최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | UP-0625374 (2007-01-22) |
등록번호 | US-7579939 (2009-09-08) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 135 인용 특허 : 496 |
A vehicular video mirror system comprises an interior electrochromic mirror having a transflective mirror reflector and a video screen disposed behind the mirror reflector so that its presence is substantially unobservable to a driver of the vehicle until the video screen is actuated to emit light t
A vehicular video mirror system comprises an interior electrochromic mirror having a transflective mirror reflector and a video screen disposed behind the mirror reflector so that its presence is substantially unobservable to a driver of the vehicle until the video screen is actuated to emit light that passes through the electrochromic reflective element to be viewed by the driver of the vehicle. Common control circuit circuitry may control dimming of the electrochromic medium and actuation of the video screen. The control circuitry may receive a signal indicative of selection of a reverse gear of the vehicle by the driver and actuates the video screen in order to display video images captured by a video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle.
We claim: 1. A video mirror system suitable for use in a vehicle, said video mirror system comprising: an interior rearview mirror assembly; said interior rearview mirror assembly comprising an electrochromic reflective element, said reflective element providing a rearward field of view to a driver
We claim: 1. A video mirror system suitable for use in a vehicle, said video mirror system comprising: an interior rearview mirror assembly; said interior rearview mirror assembly comprising an electrochromic reflective element, said reflective element providing a rearward field of view to a driver of a vehicle when said interior rearview mirror assembly is mounted in the vehicle; said electrochromic reflective element comprising an electrochromic medium disposed between a first substrate and a second substrate; said first substrate being closer to the driver of the vehicle than said second substrate when said interior rearview mirror assembly is mounted in the vehicle; said first substrate having a first surface and a second surface; said first surface being closer to the driver of the vehicle than said second surface when said interior rearview mirror assembly is mounted in the vehicle; said second substrate having a third surface and a fourth surface; said third surface being closer to the driver of the vehicle than said fourth surface when said interior rearview mirror assembly is mounted in the vehicle; a transparent electrical conductor disposed at said second surface of said first substrate; a mirror reflector disposed at said third surface of said second substrate; said mirror reflector comprising a metal layer; said metal layer comprising at least one of (i) silver, (ii) aluminum, (iii) an alloy of silver, and (iv) an alloy of aluminum; said interior rearview mirror assembly comprising a video screen; said video screen disposed to the rear of said fourth surface of said second substrate; said video screen comprising one of (i) a back-lit liquid crystal device, (ii) a light emitting diode display device, (iii) an electroluminescent display device, (iv) a plasma display device, and (v) a field emission display device; said video screen emitting light when actuated to display a video image, said emitted light passing through said electrochromic reflective element to be viewed by the driver of the vehicle; said mirror reflector comprising a transflective mirror reflector and wherein the presence of said video screen disposed to the rear of said fourth surface of said second substrate is substantially unobservable to a driver of the vehicle until said video screen is actuated to emit light that passes through said electrochromic reflective element to be viewed by the driver of the vehicle; said interior rearview mirror assembly comprising at least one light sensing photosensor, said at least one light sensing photosensor sensing the intensity of ambient light present when said interior rearview mirror assembly is being operated in the vehicle; said interior rearview mirror assembly comprising control circuitry; said control circuitry increasing the intensity of light emitted by said video screen when said ambient light is high and said control circuit circuitry decreasing the intensity of light emitted by said video screen when said ambient light is low; said control circuitry comprising said at least one light sensing photosensor; said control circuitry comprising at least one of (i) electronic components that commonly control dimming of said electrochromic medium and actuation of said video screen and (ii) sub-circuitry that commonly controls dimming of said electrochromic medium and actuation of said video screen; said control circuitry receiving a signal indicative of selection of a reverse gear of the vehicle by the driver of the vehicle; wherein said control circuitry actuates said video screen while a reversing maneuver is being undertaken by the driver of the vehicle in order to display video images captured by a video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; wherein said control circuitry deactuates said video screen when the reversing maneuver of the vehicle is completed in order to cease display of video images captured by said video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; and wherein said video screen has a diagonal screen dimension in a range of about 1 inch to about 4 inches. 2. The video mirror system according to claim 1, wherein said interior rearview mirror assembly connects to a network bus of the vehicle. 3. The video mirror system according to claim 1, wherein said interior rearview mirror assembly comprises a wireless link to another accessory of the vehicle, said wireless link being in accordance with a short-range RF communication protocol. 4. The video mirror system according to claim 1, wherein at least one of (a) said interior rearview mirror assembly comprises at least one of (i) a metal foil and (ii) a metallized sheet or film to reduce EMI/RF emissions, (b) said interior rearview mirror assembly comprises a plurality of light emitting diodes, said plurality of light emitting diodes emitting white light when actuated, (c) said video screen serves as a video screen for at least one of (i) a vehicular camera and (ii) a portable electronic device, (d) a forward-facing video camera is provided and wherein said video screen displays at least one of (i) an area immediately forward of the vehicle and (ii) an area down field of the forward direction of motion of the vehicle as imaged by said forward-facing video camera when a forward gear of the vehicle is selected and when the vehicle is moving slowly, (e) said interior rearview mirror assembly functions as part of a wireless communication telematic system of the vehicle, (f) wiring or cabling required for operation of said video screen passes through a support arm and least one ball joint of said mirror assembly, (g) wiring or cabling required for operation of said video screen passes through a support arm and two ball joints of said mirror assembly, (h) said control circuitry receives video data via a fiber-optic link, (i) said video imaging device views a towbar/hitch connection and (j) said video imaging device comprises a CMOS camera. 5. The video mirror system according to claim 1, further comprising indicia overlaying the video images captured by said video imaging device as seen on said video screen, and wherein at least one of (a) said indicia includes an indication of a distance to an object and (b) said indicia includes an indication of a distance to an object, said indication comprising an electronically generated graphic display. 6. The video mirror system according to claim 1, wherein said interior rearview mirror assembly includes at least one accessory selected from the group consisting of (i) a trainable garage door opener, (ii) a universal home access system, (iii) an INTERNET interface, (iv) a remote keyless entry receiver, (v) a video device, (vi) a rain sensor, (vii) a compass sensor, (viii) a flip computer, (ix) an intrusion detector, (x) a phone, (xi) an interior light, (xii) a seat occupancy detector, (xiii) a phone attachment, (xiv) a compass direction display, (xv) a map light, (xvi) a headlamp controller, (xvii) a printer, (xviii) a transmitter/receiver, (xix) a modem, (xx) an instrumentation light (xxi) a console light, (xxii) a solar panel, (xxiii) a windshield portion defogger device, (xxiv) an antenna, (xxv) a loudspeaker, (xxvi) a microphone, (xxvii) a digital message recorder, (xxviii) a magnetic tape message recorder, (xxix) a phone control panel, and (xxx) a digital storage device. 7. The video mirror system according to claim 1, wherein said interior rearview mirror assembly includes at least one of (a) a user input for a telematic system of the vehicle, (b) a compass sensor and (c) a compass direction display. 8. A video mirror system suitable for use in a vehicle, said video mirror system comprising: an interior rearview mirror assembly; said interior rearview mirror assembly comprising an electrochromic reflective element, said reflective element providing a rearward field of view to a driver of a vehicle when said interior rearview mirror assembly is mounted in the vehicle; said electrochromic reflective element comprising an electrochromic medium disposed between a first substrate and a second substrate; said first substrate being closer to the driver of the vehicle than said second substrate when said interior rearview mirror assembly is mounted in the vehicle; said first substrate having a first surface and a second surface; said first surface being closer to the driver of the vehicle than said second surface when said interior rearview mirror assembly is mounted in the vehicle; said second substrate having a third surface and a fourth surface; said third surface being closer to the driver of the vehicle than said fourth surface when said interior rearview mirror assembly is mounted in the vehicle; a transparent electrical conductor disposed at said second surface of said first substrate; a mirror reflector disposed at said third surface of said second substrate; said interior rearview mirror assembly comprising a video screen; said video screen disposed to the rear of said fourth surface of said second substrate; said video screen comprising a back-lit liquid crystal device; said video screen emitting light when actuated to display a video image, said emitted light passing through said electrochromic reflective element to be viewed by the driver of the vehicle; said mirror reflector comprising a transflective mirror reflector and wherein the presence of said video screen disposed to the rear of said fourth surface of said second substrate is substantially unobservable to a driver of the vehicle until said video screen is actuated to emit light that passes through said electrochromic reflective element to be viewed by the driver of the vehicle; said interior rearview mirror assembly comprising at least one light sensing photosensor, said at least one light sensing photosensor sensing the intensity of ambient light present when said interior rearview mirror assembly is being operated in the vehicle; said interior rearview mirror assembly comprising control circuitry; said control circuitry comprising at least one of (i) electronic components that commonly control dimming of said electrochromic medium and actuation of said video screen and (ii) sub-circuitry that commonly controls dimming of said electrochromic medium and actuation of said video screen; said control circuitry receiving a signal indicative of selection of a reverse gear of the vehicle by the driver of the vehicle; wherein said control circuitry actuates said video screen while a reversing maneuver is being undertaken by the driver of the vehicle in order to display video images captured by a video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; wherein said control circuitry deactuates said video screen when the reversing maneuver of the vehicle is completed in order to cease display of video images captured by said video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; wherein said video screen has a diagonal screen dimension in a range of about 1 inch to about 4 inches; and wherein said interior rearview mirror assembly comprises a plurality of light emitting diodes, said plurality of light emitting diodes emitting white light when actuated. 9. The video mirror system according to claim 8, wherein said interior rearview mirror assembly includes at least one of (a) a user input for a telematic system of the vehicle, (b) a compass sensor and (c) a compass direction display. 10. The video mirror system according to claim 8, wherein said control circuitry at least one of (i) increases the intensity of light emitted by said video screen when said ambient light is high and decreases the intensity of light emitted by said video screen when said ambient light is low, and (ii) increases the intensity of light emitted by said video screen to compensate for loss of transmission trough said electrochromic reflective element when said electrochromic medium dims responsive to a voltage applied thereto. 11. The video mirror system according to claim 8, wherein said control circuit circuitry comprises at least one of (i) electronic components that commonly control dimming of said electrochromic medium and actuation of said video screen and (ii) sub-circuitry that commonly controls dimming of said electrochromic medium and actuation of said video screen. 12. A video mirror system suitable for use in a vehicle, said video mirror system comprising: an interior rearview mirror assembly; said interior rearview mirror assembly comprising an electrochromic reflective element, said reflective element providing a rearward field of view to a driver of a vehicle when said interior rearview mirror assembly is mounted in the vehicle; said electrochromic reflective element comprising an electrochromic medium disposed between a first substrate and a second substrate; said first substrate being closer to the driver of the vehicle than said second substrate when said interior rearview mirror assembly is mounted in the vehicle; said first substrate having a first surface and a second surface; said first surface being closer to the driver of the vehicle than said second surface when said interior rearview mirror assembly is mounted in the vehicle; said second substrate having a third surface and a fourth surface; said third surface being closer to the driver of the vehicle than said fourth surface when said interior rearview mirror assembly is mounted in the vehicle; a transparent electrical conductor disposed at said second surface of said first substrate; a mirror reflector disposed at said third surface of said second substrate; said interior rearview mirror assembly comprising a video screen; said video screen disposed to the rear of said fourth surface of said second substrate; said video screen comprising a back-lit liquid crystal device; said video screen emitting light when actuated to display a video image, said emitted light passing through said electrochromic reflective element to be viewed by the driver of the vehicle; said mirror reflector comprising a transflective mirror reflector and wherein the presence of said video screen disposed to the rear of said fourth surface of said second substrate is substantially unobservable to a driver of the vehicle until said video screen is actuated to emit light that passes through said electrochromic reflective element to be viewed by the driver of the vehicle; said interior rearview mirror assembly comprising at least one light sensing photosensor, said at least one light sensing photosensor sensing the intensity of ambient light present when said interior rearview mirror assembly is being operated in the vehicle; said interior rearview mirror assembly comprising control circuitry; said control circuitry comprising at least one of (i) electronic components that commonly control dimming of said electrochromic medium and actuation of said video screen and (ii) sub-circuitry that commonly controls dimming of said electrochromic medium and actuation of said video screen; said control circuitry receiving a signal indicative of selection of a reverse gear of the vehicle by the driver of the vehicle; wherein said control circuitry actuates said video screen while a reversing maneuver is being undertaken by the driver of the vehicle in order to display video images captured by a video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; wherein said control circuitry deactuates said video screen when the reversing maneuver of the vehicle is completed in order to cease display of video images captured by said video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; wherein said video screen has a diagonal screen dimension in a range of about 1 inch to about 4 inches; and including indicia overlaying the video images captured by said video imaging device as seen on said video screen. 13. The video mirror system according to claim 12, wherein said mirror reflector comprises a metal layer and wherein said metal layer comprises at least one of (i) silver, (ii) aluminum, (iii) an alloy of silver, and (iv) an alloy of aluminum. 14. The video mirror system according to claim 12, wherein said video screen serves as a video screen for at least one of (i) a vehicular camera and (ii) a portable electronic device. 15. The video mirror system according to claim 12, wherein said interior rearview mirror assembly functions as part of a wireless communication telematic system of the vehicle. 16. The video mirror system according to claim 12, wherein wiring or cabling required for operation of said video screen passes through a support arm and two ball joints of said mirror assembly. 17. The video mirror system according to claim 12, wherein said interior rearview mirror assembly includes at least one of (a) a user input for a telematic system of the vehicle, (b) a compass sensor and (c) a compass direction display. 18. A video mirror system suitable for use in a vehicle, said video mirror system comprising: an interior rearview mirror assembly; said interior rearview mirror assembly comprising an electrochromic reflective element, said reflective element providing a rearward field of view to a driver of a vehicle when said interior rearview mirror assembly is mounted in the vehicle; said electrochromic reflective element comprising an electrochromic medium disposed between a first substrate and a second substrate; said first substrate being closer to the driver of the vehicle than said second substrate when said interior rearview mirror assembly is mounted in the vehicle; said first substrate having a first surface and a second surface; said first surface being closer to the driver of the vehicle than said second surface when said interior rearview mirror assembly is mounted in the vehicle; said second substrate having a third surface and a fourth surface; said third surface being closer to the driver of the vehicle than said fourth surface when said interior rearview mirror assembly is mounted in the vehicle; a transparent electrical conductor disposed at said second surface of said first substrate; a mirror reflector disposed at said third surface of said second substrate; said interior rearview mirror assembly comprising a video screen; said video screen disposed to the rear of said fourth surface of said second substrate; said video screen comprising a back-lit liquid crystal device; said video screen emitting light when actuated to display a video image, said emitted light passing through said electrochromic reflective element to be viewed by the driver of the vehicle; said mirror reflector comprising a transflective mirror reflector and wherein the presence of said video screen disposed to the rear of said fourth surface of said second substrate is substantially unobservable to a driver of the vehicle until said video screen is actuated to emit light that passes through said electrochromic reflective element to be viewed by the driver of the vehicle; said interior rearview mirror assembly comprising at least one light sensing photosensor, said at least one light sensing photosensor sensing the intensity of ambient light present when said interior rearview mirror assembly is being operated in the vehicle; said interior rearview mirror assembly comprising control circuitry; said control circuitry comprising at least one of (i) electronic components that commonly control dimming of said electrochromic medium and actuation of said video screen and (ii) sub-circuitry that commonly controls dimming of said electrochromic medium and actuation of said video screen; said control circuitry receiving a signal indicative of selection of a reverse gear of the vehicle by the driver of the vehicle; wherein said control circuitry actuates said video screen while a reversing maneuver is being undertaken by the driver of the vehicle in order to display video images captured by a video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; wherein said control circuitry deactuates said video screen when the reversing maneuver of the vehicle is completed in order to cease display of video images captured by said video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; wherein said video screen has a diagonal screen dimension in a range of about 1 inch to about 4 inches; including electronically generated indicia overlaying the video images captured by said video imaging device as seen on said video screen; wherein said interior rearview mirror assembly connects to a network bus of the vehicle; wherein said video imaging device comprises a CMOS camera; and wherein said interior rearview mirror assembly comprises at least one light emitting diode, said at least one light emitting diode emitting white light when actuated. 19. The video mirror system according to claim 18, wherein said interior rearview mirror assembly includes at least one of (a) a user input for a telematic system of the vehicle, (b) a compass sensor and (c) a compass direction display. 20. The video mirror system according to claim 18, wherein said control circuitry at least one of (i) increases the intensity of light emitted by said video screen when said ambient light is high and decreases the intensity of light emitted by said video screen when said ambient light is low, and (ii) increases the intensity of light emitted by said video screen to compensate for loss of transmission through said electrochromic reflective element when said electrochromic medium dims responsive to a voltage applied thereto. 21. A video mirror system suitable for use in a vehicle, said video mirror system comprising: an interior rearview mirror assembly; said interior rearview mirror assembly comprising an electrochromic reflective element, said reflective element providing a rearward field of view to a driver of a vehicle when said interior rearview mirror assembly is mounted in the vehicle; said electrochromic reflective element comprising an electrochromic medium disposed between a first substrate and a second substrate; said first substrate being closer to the driver of the vehicle than said second substrate when said interior rearview mirror assembly is mounted in the vehicle; said first substrate having a first surface and a second surface; said first surface being closer to the driver of the vehicle than said second surface when said interior rearview mirror assembly is mounted in the vehicle; said second substrate having a third surface and a fourth surface; said third surface being closer to the driver of the vehicle than said fourth surface when said interior rearview mirror assembly is mounted in the vehicle; a transparent electrical conductor disposed at said second surface of said first substrate; a mirror reflector disposed at said third surface of said second substrate; said mirror reflector comprising a metal layer; said metal layer comprising at least one of (i) silver, (ii) aluminum, (iii) an alloy of silver, and (iv) an alloy of aluminum; said interior rearview mirror assembly comprising a video screen; said video screen disposed to the rear of said fourth surface of said second substrate; said video screen comprising a back-lit liquid crystal device; said video screen emitting light when actuated to display a video image, said emitted light passing through said electrochromic reflective element to be viewed by the driver of the vehicle; said mirror reflector comprising a transflective mirror reflector and wherein the presence of said video screen disposed to the rear of said fourth surface of said second substrate is substantially unobservable to a driver of the vehicle until said video screen is actuated to emit light that passes through said electrochromic reflective element to be viewed by the driver of the vehicle; said interior rearview mirror assembly comprising at least one light sensing photosensor, said at least one light sensing photosensor sensing the intensity of ambient light present when said interior rearview mirror assembly is being operated in the vehicle; said interior rearview mirror assembly comprising control circuitry; said control circuitry increasing the intensity of light emitted by said video screen when said ambient light is high and said control circuit circuitry decreasing the intensity of light emitted by said video screen when said ambient light is low; said control circuitry receiving a signal indicative of selection of a reverse gear of the vehicle by the driver of the vehicle; wherein said control circuitry actuates said video screen while a reversing maneuver is being undertaken by the driver of the vehicle in order to display video images captured by a video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; wherein said control circuitry deactuates said video screen when the reversing maneuver of the vehicle is completed in order to cease display of video images captured by said video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; wherein said video screen has a diagonal screen dimension in a range of about 1 inch to about 4 inches; and wherein said video screen is disposed to the rear of said reflective element at the side of said reflective element that corresponds to the driver-side of said interior rearview mirror assembly when said interior rearview mirror assembly is mounted in a vehicle and is viewed by a driver of said vehicle sitting at the driver-side front seat of said vehicle. 22. The video mirror system according to claim 21, wherein at least one of (a) said interior rearview mirror assembly functions as part of a wireless communication telematic system of the vehicle and (b) wiring or cabling required for operation of said video screen passes through a support arm and two ball joints of said mirror assembly. 23. The video mirror system according to claim 21, wherein said control circuitry comprises at least one of (i) electronic components that commonly control dimming of said electrochromic medium and actuation of said video screen and (ii) sub-circuitry that commonly controls dimming of said electrochromic medium and actuation of said video screen. 24. The video mirror system according to claim 21, wherein said photo sensor comprises at least one of a photo diode or a photo transistor. 25. The video mirror system according to claim 21, wherein said interior rearview mirror assembly includes at least one of (a) a user input for a telematic system of the vehicle, (b) a compass sensor and (c) a compass direction display. 26. A video mirror system suitable for use in a vehicle, said video mirror system comprising: an interior rearview mirror assembly; said interior rearview mirror assembly comprising an electrochromic reflective element, said reflective element providing a rearward field of view to a driver of a vehicle when said interior rearview mirror assembly is mounted in the vehicle; said electrochromic reflective element comprising an electrochromic medium disposed between a first substrate and a second substrate; said first substrate being closer to the driver of the vehicle than said second substrate when said interior rearview mirror assembly is mounted in the vehicle; said first substrate having a first surface and a second surface; said first surface being closer to the driver of the vehicle than said second surface when said interior rearview mirror assembly is mounted in the vehicle; said second substrate having a third surface and a fourth surface; said third surface being closer to the driver of the vehicle than said fourth surface when said interior rearview mirror assembly is mounted in the vehicle; a transparent electrical conductor disposed at said second surface of said first substrate; a mirror reflector disposed at said third surface of said second substrate; said mirror reflector comprising a metal layer; said metal layer comprising at least one of (i) silver, (ii) aluminum, (iii) an alloy of silver, and (iv) an alloy of aluminum; said interior rearview mirror assembly comprising a video screen; said video screen disposed to the rear of said fourth surface of said second substrate; said video screen comprising a back-lit liquid crystal display screen; said video screen emitting light when actuated to display a video image, said emitted light passing through said electrochromic reflective element to be viewed by the driver of the vehicle; said mirror reflector comprising a transflective mirror reflector and wherein the presence of said video screen disposed to the rear of said fourth surface of said second substrate is substantially unobservable to a driver of the vehicle until said video screen is actuated to emit light that passes through said electrochromic reflective element to be viewed by the driver of the vehicle; said interior rearview mirror assembly comprising at least one light sensing photosensor, said at least one light sensing photosensor sensing the intensity of ambient light present when said interior rearview mirror assembly is being operated in the vehicle; said interior rearview mirror assembly comprising control circuitry; said control circuitry increasing the intensity of light emitted by said video screen when said ambient light is high and said control circuit circuitry decreasing the intensity of light emitted by said video screen when said ambient light is low; said control circuitry comprising at least one of (i) electronic components that commonly control dimming of said electrochromic medium and actuation of said video screen and (ii) sub-circuitry that commonly controls dimming of said electrochromic medium and actuation of said video screen; said control circuitry receiving a signal indicative of selection of a reverse gear of the vehicle by the driver of the vehicle; wherein said control circuitry actuates said video screen while a reversing maneuver is being undertaken by the driver of the vehicle in order to display video images captured by a video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; wherein said control circuitry deactuates said video screen when the reversing maneuver of the vehicle is completed in order to cease display of video images captured by said video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; wherein said video screen has a diagonal screen dimension in a range of about 1 inch to about 4 inches; and wherein said interior rearview mirror assembly comprises a metal emitted radiation shield that reduces electromagnetic radiation therefrom. 27. The video mirror system of claim 26, wherein said video screen is housed in a video display housing along with electronic circuitry and wherein said video display housing comprises said metal emitted radiation shield that reduces electromagnetic radiation from said electronic circuitry and/or said video screen. 28. The video mirror system of claim 27, wherein said metal emitted radiation shield comprises at least one of (i) a metal foil, (ii) a metal sheet and (iii) a metal film. 29. The video mirror system of claim 27, wherein said video screen comprises a flat-panel matrix-addressable reconfigurable backlit liquid crystal display screen. 30. The video mirror system of claim 29, wherein said video screen is disposed in said interior rearview mirror assembly at a position at the rear of said reflective element and at the side of said interior rearview mirror assembly that is closer to the driver when said interior rearview mirror assembly is mounted and operated in the vehicle. 31. The video mirror system of claim 26, wherein said video screen comprises a backlit pixelated liquid crystal display screen. 32. The video mirror system of claim 26, wherein said video screen comprises a backlit reconfigurable liquid crystal display screen. 33. A video mirror system suitable for use in a vehicle, said video mirror system comprising: an interior rearview mirror assembly; said interior rearview mirror assembly comprising an electrochromic reflective element, said reflective element providing a rearward field of view to a driver of a vehicle when said interior rearview mirror assembly is mounted in the vehicle; said electrochromic reflective element comprising an electrochromic medium disposed between a first substrate and a second substrate; said first substrate being closer to the driver of the vehicle than said second substrate when said interior rearview mirror assembly is mounted in the vehicle; said first substrate having a first surface and a second surface; said first surface being closer to the driver of the vehicle than said second surface when said interior rearview mirror assembly is mounted in the vehicle; said second substrate having a third surface and a fourth surface; said third surface being closer to the driver of the vehicle than said fourth surface when said interior rearview mirror assembly is mounted in the vehicle; a transparent electrical conductor disposed at said second surface of said first substrate; a mirror reflector disposed at said third surface of said second substrate; said mirror reflector comprising a metal layer; said metal layer comprising at least one of (i) silver, (ii) aluminum, (iii) an alloy of silver, and (iv) an alloy of aluminum; said interior rearview mirror assembly comprising a video screen; said video screen disposed to the rear of said fourth surface of said second substrate; said video screen comprising a back-lit liquid crystal display screen; said video screen emitting light when actuated to display a video image, said emitted light passing through said electrochromic reflective element to be viewed by the driver of the vehicle; said mirror reflector comprising a transflective mirror reflector and wherein the presence of said video screen disposed to the rear of said fourth surface of said second substrate is substantially unobservable to a driver of the vehicle until said video screen is actuated to emit light that passes through said electrochromic reflective clement to be viewed by the driver of the vehicle; said interior rearview mirror assembly comprising at least one light sensing photosensor, said at least one light sensing photosensor sensing the intensity of ambient light present when said interior rearview mirror assembly is being operated in the vehicle; said interior rearview mirror assembly comprising control circuitry; said control circuitry increasing the intensity of light emitted by said video screen when said ambient light is high and said control circuit circuitry decreasing the intensity of light emitted by said video screen when said ambient light is low; said control circuitry comprising at least one of (i) electronic components that commonly control dimming of said electrochromic medium and actuation of said video screen and (ii) sub-circuitry that commonly controls dimming of said electrochromic medium and actuation of said video screen; wherein contrast enhancement is provided for said video screen to increase the contrast ratio between a video image displayed by said video screen and ambient light; said control circuitry receiving a signal indicative of selection of a reverse gear of the vehicle by the driver of the vehicle; wherein said control circuitry actuates said video screen while a reversing maneuver is being undertaken by the driver of the vehicle in order to display video images captured by a video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; wherein said control circuitry deactuates said video screen when the reversing maneuver of the vehicle is completed in order to cease display of video images captured by said video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; and wherein said video screen has a diagonal screen dimension in a range of about 1 inch to about 4 inches. 34. A video mirror system suitable for use in a vehicle, said video mirror system comprising: an interior rearview mirror assembly; said interior rearview mirror assembly comprising an electrochromic reflective element, said reflective element providing a rearward field of view to a driver of a vehicle when said interior rearview mirror assembly is mounted in the vehicle; said electrochromic reflective element comprising an electrochromic medium disposed between a first substrate and a second substrate; said first substrate being closer to the driver of the vehicle than said second substrate when said interior rearview mirror assembly is mounted in the vehicle; said first substrate having a first surface and a second surface; said first surface being closer to the driver of the vehicle than said second surface when said interior rearview mirror assembly is mounted in the vehicle; said second substrate having a third surface and a fourth surface; said third surface being closer to the driver of the vehicle than said fourth surface when said interior rearview mirror assembly is mounted in the vehicle; a transparent electrical conductor disposed at said second surface of said first substrate; a mirror reflector disposed at said third surface of said second substrate; said mirror reflector comprising a metal layer; said metal layer comprising at least one of (i) silver, (ii) aluminum, (iii) an alloy of silver, and (iv) an alloy of aluminum; said interior rearview mirror assembly comprising a video screen; said video screen disposed to the rear of said fourth surface of said second substrate; said video screen comprising a back-lit liquid crystal display screen; said video screen emitting light when actuated to display a video image, said emitted light passing through said electrochromic reflective element to be viewed by the driver of the vehicle; said mirror reflector comprising a transflective mirror reflector and wherein the presence of said video screen disposed to the rear of said fourth surface of said second substrate is substantially unobservable to a driver of the vehicle until said video screen is actuated to emit light that passes through said electrochromic reflective element to be viewed by the driver of the vehicle; said interior rearview mirror assembly comprising at least one light sensing photosensor, said at least one light sensing photosensor sensing the intensity of ambient light present when said interior rearview mirror assembly is being operated in the vehicle; said interior rearview mirror assembly comprising control circuitry; said control circuitry increasing the intensity of light emitted by said video screen When said ambient light is high and said control circuit circuitry decreasing the intensity of light emitted by said video screen when said ambient light is low; said control circuitry comprising at least one of (i) electronic components that commonly control dimming of said electrochromic medium and actuation of said video screen and (ii) sub-circuitry that commonly controls dimming of said electrochromic medium and actuation of said video screen; said control circuitry receiving a signal indicative of selection of a reverse gear of the vehicle by the driver of the vehicle; wherein said control circuitry actuates said video screen while a reversing maneuver is being undertaken by the driver of the vehicle in order to display video images captured by a video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; wherein said control circuitry deactuates said video screen when the reversing maneuver of the vehicle is completed in order to cease display of video images captured by said video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; wherein said video screen has a diagonal screen dimension in a range of about 1 inch to about 4 inches; and wherein a contrast enhancement element is provided for said video screen to increase the contrast ratio between a video image displayed by said video screen and ambient light and wherein said contrast enhancement element encompasses substantially the entire video screen dimension. 35. A video mirror system suitable for use in a vehicle, said video mirror system comprising: an interior rearview mirror assembly; said interior rearview mirror assembly comprising an electrochromic reflective element, said reflective element providing a rearward field of view to a driver of a vehicle when said interior rearview mirror assembly is mounted in the vehicle; said electrochromic reflective element comprising an electrochromic medium disposed between a first substrate and a second substrate; said first substrate being closer to the driver of the vehicle than said second substrate when said interior rearview mirror assembly is mounted in the vehicle; said first substrate having a first surface and a second surface; said first surface being closer to the driver of the vehicle than said second surface when said interior rearview mirror assembly is mounted in the vehicle; said second substrate having a third surface and a fourth surface; said third surface being closer to the driver of the vehicle than said fourth surface when said interior rearview mirror assembly is mounted in the vehicle; a transparent electrical conductor disposed at said second surface of said first substrate; a mirror reflector disposed at said third surface of said second substrate; said mirror reflector comprising a metal layer; said metal layer comprising at least one of (i) silver, (ii) aluminum, (iii) an alloy of silver, and (iv) an alloy of aluminum; said interior rearview mirror assembly comprising a video screen; said video screen disposed to the rear of said fourth surface of said second substrate; said video screen comprising a back-lit liquid crystal display screen; said video screen emitting light when actuated to display a video image, said emitted light passing through said electrochromic reflective element to be viewed by the driver of the vehicle; said mirror reflector comprising a transflective mirror reflector and wherein the presence of said video screen disposed to the rear of said fourth surface of said second substrate is substantially unobservable to a driver of the vehicle until said video screen is actuated to emit light that passes through said electrochromic reflective element to be viewed by the driver of the vehicle; said interior rearview mirror assembly comprising at least one light sensing photosensor, said at least one light sensing photosensor sensing the intensity of ambient light present when said interior rearview mirror assembly is being operated in the vehicle; said interior rearview mirror assembly comprising control circuitry; said control circuitry increasing the intensity of light emitted by said video screen when said ambient light is high and said control circuit circuitry decreasing the intensity of light emitted by said video screen when said ambient light is low; said control circuitry comprising at least one of (i) electronic components that commonly control dimming of said electrochromic medium and actuation of said video screen and (ii) sub-circuitry that commonly controls dimming of said electrochromic medium and actuation of said video screen; said control circuitry receiving a signal indicative of selection of a reverse gear of the vehicle by the driver of the vehicle; wherein said control circuitry actuates said video screen while a reversing maneuver is being undertaken by the driver of the vehicle in order to display video images captured by a video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; wherein said control circuitry deactuates said video screen when the reversing maneuver of the vehicle is completed in order to cease display of video images captured by said video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; wherein said video screen has a diagonal screen dimension in a range of about 1 inch to about 4 inches; wherein said interior rearview mirror assembly connects to a network bus of the vehicle; and wherein said interior rearview mirror assembly includes at least one accessory selected from the group consisting of (i) a trainable garage door opener, (ii) a video device, (iii) a compass sensor, (iv) an interior light, (v) a compass direction display, (vi) a map light, (vii) a headlamp controller, (viii) a console light, (ix) a microphone, and (x) a user input for a telematic system of the vehicle. 36. The video mirror system of claim 35, wherein said interior rearview mirror assembly includes at least one accessory selected from the group consisting of (i) a trainable garage door opener, (ii) a compass sensor, (iii) a headlamp controller, (iv) a microphone, and (v) a user input for a telematic system of the vehicle. 37. The video mirror system of claim 35, wherein said interior rearview mirror assembly includes at least one of (i) a user input for a telematic system of the vehicle, (ii) a compass sensor and (iii) a compass direction display. 38. The video mirror system of claim 35, wherein said video screen comprises a flat-panel matrix-addressable reconfigurable backlit liquid crystal display screen. 39. The video mirror system of claim 35, wherein said video screen is disposed in said interior rearview mirror assembly at a position at the rear of said reflective element and at the side of said interior rearview mirror assembly that is closer to the driver when said interior rearview mirror assembly is mounted and operated in the vehicle. 40. A video mirror system suitable for use in a vehicle, said video mirror system comprising: an interior rearview mirror assembly; said interior rearview mirror assembly comprising an electrochromic reflective element, said reflective element providing a rearward field of view to a driver of a vehicle when said interior rearview mirror assembly is mounted in the vehicle; said electrochromic reflective element comprising an electrochromic medium disposed between a first substrate and a second substrate; said first substrate being closer to the driver of the vehicle than said second substrate when said interior rearview mirror assembly is mounted in the vehicle; said first substrate having a first surface and a second surface; said first surface being closer to the driver of the vehicle than said second surface when said interior rearview mirror assembly is mounted in the vehicle; said second substrate having a third surface and a fourth surface; said third surface being closer to the driver of the vehicle than said fourth surface when said interior rearview mirror assembly is mounted in the vehicle; a transparent electrical conductor disposed at said second surface of said first substrate; a mirror reflector disposed at said third surface of said second substrate; said mirror reflector comprising a metal layer; said metal layer comprising at least one of (i) silver, (ii) aluminum, (iii) an alloy of silver, and (iv) an alloy of aluminum; said interior rearview mirror assembly comprising a video screen; wherein said video screen comprises a flat-panel matrix-addressable reconfigurable backlit liquid crystal display screen; said video screen disposed to the rear of said fourth surface of said second substrate; wherein said video screen is disposed in said interior mirror assembly at a position that is at the side of said interior rearview mirror assembly that is closer to the driver when said interior rearview mirror assembly is mounted and operated in the vehicle; said video screen emitting light when actuated to display a video image, said emitted light passing through said electrochromic reflective element to be viewed by the driver of the vehicle; said mirror reflector comprising a transflective mirror reflector and wherein the presence of said video screen disposed to the rear of said fourth surface of said second substrate is substantially unobservable to a driver of the vehicle until said video screen is actuated to emit light that passes through said electrochromic reflective element to be viewed by the driver of the vehicle; said interior rearview mirror assembly comprising at least one light sensing photosensor, said at least one light sensing photosensor sensing the intensity of ambient light present when said interior rearview mirror assembly is being operated in the vehicle; said interior rearview mirror assembly comprising control circuitry; said control circuitry increasing the intensity of light emitted by said video screen when said ambient light is high and said control circuit circuitry decreasing the intensity of light emitted by said video screen when said ambient light is low; said control circuitry comprising said at least one light sensing photosensor; said control circuitry receiving a signal indicative of selection of a reverse gear of the vehicle by the driver of the vehicle; wherein said control circuitry actuates said video screen while a reversing maneuver is being undertaken by the driver of the vehicle in order to display video images captured by a video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; and wherein said interior mirror assembly comprises a metal emitted radiation shield that reduces electromagnetic radiation therefrom. 41. The video mirror system of claim 40, wherein said video screen is housed in a video display housing along with electronic circuitry and wherein said video display housing comprises said metal emitted radiation shield that reduces electromagnetic radiation from said electronic circuitry and/or said video screen. 42. The video mirror system of claim 41, wherein said metal emitted radiation shield comprises at least one of (i) a metal foil, (ii) a metal sheet and (iii) a metal film. 43. The video mirror system of claim 41, wherein at least one of (a) said control circuitry comprises at least one of (i) electronic components that commonly control dimming of said electrochromic medium and actuation of said video screen and (ii) sub-circuitry that commonly controls dimming of said electrochromic medium and actuation of said video screen, (b) said control circuitry deactuates said video screen when the reversing maneuver of the vehicle is completed in order to cease display of video images captured by said video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle, and (c) said video screen has a diagonal screen dimension in a range of about 1 inch to about 4 inches. 44. The video mirror system of claim 40, wherein said video screen optically couples at said fourth surface of said second substrate via at least one of (i) an index matching medium having a refractive index measured at the sodium D line of from about 1.45 to about 1.57, (ii) an optical adhesive and (iii) an optical polymer. 45. A video mirror system suitable for use in a vehicle, said video mirror system comprising: an interior rearview mirror assembly; said interior rearview mirror assembly comprising an electrochromic reflective element, said reflective element providing a rearward field of view to a driver of a vehicle when said interior rearview mirror assembly is mounted in the vehicle; said electrochromic reflective element comprising an electrochromic medium disposed between a first substrate and a second substrate; said first substrate being closer to the driver of the vehicle than said second substrate when said interior rearview mirror assembly is mounted in the vehicle; said first substrate having a first surface and a second surface; said first surface being closer to the driver of the vehicle than said second surface when said interior rearview mirror assembly is mounted in the vehicle; said second substrate having a third surface and a fourth surface; said third surface being closer to the driver of the vehicle than said fourth surface when said interior rearview mirror assembly is mounted in the vehicle; a transparent electrical conductor disposed at said second surface of said first substrate; a mirror reflector disposed at said third surface of said second substrate; said mirror reflector comprising a metal layer; said metal layer comprising at least one of (i) silver, (ii) aluminum, (iii) an alloy of silver, and (iv) an alloy of aluminum; said interior rearview mirror assembly comprising a video screen; said video screen disposed to the rear of said fourth surface of said second substrate; wherein said video screen comprises a backlit pixelated liquid crystal display screen; said video screen emitting light when actuated to display a video image, said emitted light passing through said electrochromic reflective element to be viewed by the driver of the vehicle; said mirror reflector comprising a transflective mirror reflector and wherein the presence of said video screen disposed to the rear of said fourth surface of said second substrate is substantially unobservable to a driver of the vehicle until said video screen is actuated to emit light that passes trough said electrochromic reflective element to be viewed by the driver of the vehicle; said interior rearview mirror assembly comprising at least one light sensing photosensor, said at least one light sensing photosensor sensing the intensity of ambient light present when said interior rearview mirror assembly is being operated in the vehicle; said interior rearview mirror assembly comprising control circuitry; said control circuitry increasing the intensity of light emitted by said video screen when said ambient light is high and said control circuit circuitry decreasing the intensity of light emitted by said video screen when said ambient light is low; said control circuitry comprising said at least one light sensing photosensor; said control circuitry comprising at least one of (i) electronic components that commonly control dimming of said electrochromic medium and actuation of said video screen and (ii) sub-circuitry that commonly controls dimming of said electrochromic medium and actuation of said video screen; said control circuitry receiving a signal indicative of selection of a reverse gear of the vehicle by the driver of the vehicle; wherein said control circuitry actuates said video screen while a reversing maneuver is being undertaken by the driver of the vehicle in order to display video images captured by a video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; wherein said control circuitry deactuates said video screen when the reversing maneuver of the vehicle is completed in order to cease display of video images captured by said video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; and wherein said video screen is housed in a video display housing along with electronic circuitry and wherein said video display housing comprises a metal emitted radiation shield that reduces electromagnetic radiation from said electronic circuitry and/or said video screen. 46. The video mirror system of claim 45, wherein said metal emitted radiation shield comprises at least one of (i) a metal foil, (ii) a metal sheet and (iii) a metal film. 47. The video mirror system of claim 45, wherein said video screen optically couples at said fourth surface of said second substrate via at least one of (i) an index matching medium having a refractive index measured at the sodium D line of from about 1.45 to about 1.57, (ii) an optical adhesive and (iii) an optical polymer. 48. The video mirror system of claim 45, wherein said video screen has a diagonal screen dimension in a range of about 1 inch to about 4 inches. 49. A video mirror system suitable for use in a vehicle, said video mirror system comprising: an interior rearview mirror assembly; said interior rearview mirror assembly comprising an electrochromic reflective element, said reflective element providing a rearward field of view to a driver of a vehicle when said interior rearview mirror assembly is mounted in the vehicle; said electrochromic reflective element comprising an electrochromic medium disposed between a first substrate and a second substrate; said first substrate being closer to the driver of the vehicle than said second substrate when said interior rearview mirror assembly is mounted in the vehicle; said first substrate having a first surface and a second surface; said first surface being closer to the driver of the vehicle than said second surface when said interior rearview mirror assembly is mounted in the vehicle; said second substrate having a third surface and a fourth surface; said third surface being closer to the driver of the vehicle than said fourth surface when said interior rearview mirror assembly is mounted in the vehicle; a transparent electrical conductor disposed at said second surface of said first substrate; a mirror reflector disposed at said third surface of said second substrate; said mirror reflector comprising a metal layer; said metal layer comprising at least one of (i) silver, (ii) aluminum, (iii) an alloy of silver, and (iv) an alloy of aluminum; said interior rearview mirror assembly comprising a video screen; said video screen disposed to the rear of said fourth surface of said second substrate; wherein said video screen is disposed in said interior mirror assembly at a position at the rear of said reflective element that is at the side of said interior mirror assembly that is closer to the driver when said interior mirror assembly is mounted and operated in the vehicle; wherein said video screen comprises a flat-panel matrix-addressable reconfigurable backlit liquid crystal display screen; said video screen emitting light when actuated to display a video image, said emitted light passing through said electrochromic reflective element to be viewed by the driver of the vehicle; said mirror reflector comprising a transflective mirror reflector and wherein the presence of said video screen disposed to the rear of said fourth surface of said second substrate is substantially unobservable to a driver of the vehicle until said video screen is actuated to emit light that passes through said electrochromic reflective element to be viewed by the driver of the vehicle; said interior rearview mirror assembly comprising at least one light sensing photosensor, said at least one light sensing photosensor sensing the intensity of ambient light present when said interior rearview mirror assembly is being operated in the vehicle; said interior rearview mirror assembly comprising control circuitry; said control circuitry increasing the intensity of light emitted by said video screen when said ambient light is high and said control circuit circuitry decreasing the intensity of light emitted by said video screen when said ambient light is low; said control circuitry comprising said at least one light sensing photosensor; said control circuitry comprising at least one of (i) electronic components that commonly control dimming of said electrochromic medium and actuation of said video screen and (ii) sub-circuitry that commonly controls dimming of said electrochromic medium and actuation of said video screen; said control circuitry receiving a signal indicative of selection of a reverse gear of the vehicle by the driver of the vehicle; wherein said control circuitry actuates said video screen while a reversing maneuver is being undertaken by the driver of the vehicle in order to display video images captured by a video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; wherein said control circuitry deactuates said video screen when the reversing maneuver of the vehicle is completed in order to cease display of video images captured by said video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; wherein said video screen is housed in a video display housing along with electronic circuitry and wherein said video display housing comprises a metal emitted radiation shield that reduces electromagnetic radiation from said electronic circuitry and/or said video screen; and wherein a contrast enhancement element is provided for said video screen to increase the contrast ratio between a video image displayed by said video screen and ambient light and wherein said contrast enhancement element encompasses substantially the entire video screen dimension. 50. The video mirror system of claim 49, wherein said metal emitted radiation shield comprises at least one of (i) a metal foil, (ii) a metal sheet and (iii) a metal film. 51. The video mirror system of claim 49, wherein said interior rearview mirror assembly connects to a network bus of the vehicle. 52. The video mirror system of claim 51, wherein said video screen has a diagonal screen dimension in a range of about 1 inch to about 4 inches. 53. The video mirror system of claim 49, wherein said video screen optically couples at said fourth surface of said rear substrate via at least one of (i) an index matching medium having a refractive index measured at the sodium D line of from about 1.45 to about 1.57, (ii) an optical adhesive and (iii) an optical polymer. 54. A video mirror system suitable for use in a vehicle, said video mirror system comprising: an interior rearview mirror assembly; said interior rearview mirror assembly comprising an electrochromic reflective element, said reflective element providing a rearward field of view to a driver of a vehicle when said interior rearview mirror assembly is mounted in the vehicle; said electrochromic reflective element comprising an electrochromic medium disposed between a first substrate and a second substrate; said first substrate being closer to the driver of the vehicle than said second substrate when said interior rearview mirror assembly is mounted in the vehicle; said first substrate having a first surface and a second surface; said first surface being closer to the driver of the vehicle than said second surface when said interior rearview mirror assembly is mounted in the vehicle; said second substrate having a third surface and a fourth surface; said third surface being closer to the driver of the vehicle than said fourth surface when said interior rearview mirror assembly is mounted in the vehicle; a transparent electrical conductor disposed at said second surface of said first substrate; a mirror reflector disposed at said third surface of said second substrate; said mirror reflector comprising a metal layer; said metal layer comprising at least one of (i) silver, (ii) aluminum, (iii) an alloy of silver, and (iv) an alloy of aluminum; said interior rearview mirror assembly comprising a video screen; wherein said video screen comprises a flat-panel matrix-addressable reconfigurable backlit liquid crystal display screen; said video screen disposed to the rear of said fourth surface of said second substrate; wherein said video screen is disposed in said interior mirror assembly at a position that is at the side of said interior mirror assembly that is closer to the driver when said interior mirror assembly is mounted and operated in the vehicle; said video screen emitting light when actuated to display a video image, said emitted light passing through said electrochromic reflective element to be viewed by the driver of the vehicle; said mirror reflector comprising a transflective mirror reflector and wherein the presence of said video screen disposed to the rear of said fourth surface of said second substrate is substantially unobservable to a driver of the vehicle until said video screen is actuated to emit light that passes through said electrochromic reflective element to be viewed by the driver of the vehicle; said interior rearview mirror assembly comprising at least one light sensing photosensor, said at least one light sensing photosensor sensing the intensity of ambient light present when said interior rearview mirror assembly is being operated in the vehicle; said interior rearview mirror assembly comprising control circuitry; said control circuitry increasing the intensity of light emitted by said video screen when said ambient light is high and said control circuit circuitry decreasing the intensity of light emitted by said video screen when said ambient light is low; said control circuitry comprising said at least one light sensing photosensor; said control circuitry comprising at least one of (i) electronic components that commonly control dimming of said electrochromic medium and actuation of said video screen and (ii) sub-circuitry that commonly controls dimming of said electrochromic medium and actuation of said video screen; said control circuitry receiving a signal indicative of selection of a reverse gear of the vehicle by the driver of the vehicle; wherein said control circuitry actuates said video screen while a reversing maneuver is being undertaken by the driver of the vehicle in order to display video images captured by a video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; wherein said control circuitry deactuates said video screen when the reversing maneuver of the vehicle is completed in order to cease display of video images captured by said video imaging device disposed to the rear of the vehicle and having a field of view rearward of and external to the vehicle; wherein said video screen is housed in a video display housing along with electronic circuitry and wherein said video display housing comprises a metal emitted radiation shield that reduces electromagnetic radiation from said electronic circuitry and/or said video screen; wherein a contrast enhancement element is provided for said video screen to increase the contrast ratio between a video image displayed by said video screen and ambient light and wherein said contrast enhancement element encompasses substantially the entire video screen dimension; and wherein said video screen has a diagonal screen dimension in a range of about 1 inch to about 4 inches.
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