An illumination source for a camera includes one or more LEDs, and an electrical circuit that selectively applies power from the DC voltage source to the LEDs, wherein the illumination source is suitable for handheld portable operation. In some embodiments, the electrical circuit further includes a
An illumination source for a camera includes one or more LEDs, and an electrical circuit that selectively applies power from the DC voltage source to the LEDs, wherein the illumination source is suitable for handheld portable operation. In some embodiments, the electrical circuit further includes a control circuit for driving the LEDs with electrical pulses at a frequency high enough that light produced has an appearance to a human user of being continuous rather than pulsed, the control circuit changing a pulse characteristic to adjust a proportion of light output having the first characteristic color spectrum output to that having the second characteristic color spectrum output. Some embodiments provide an illumination source including a housing including one or more LEDs and a control circuit that selectively applies power from a source of electric power to the LEDs, thus controlling a light output color spectrum of the LEDs.
대표청구항▼
1. A method for driving a plurality of light-emitting diodes in a device having an electronic camera, the method comprising: providing a device having a camera and a plurality of light-emitting diodes (LEDs), wherein the plurality of light-emitting diodes emits light having a spectrum that is adjust
1. A method for driving a plurality of light-emitting diodes in a device having an electronic camera, the method comprising: providing a device having a camera and a plurality of light-emitting diodes (LEDs), wherein the plurality of light-emitting diodes emits light having a spectrum that is adjustable;obtaining an image signal;measuring a color balance of the image signal;generating electrical pulses and delivering the electrical pulses to the plurality of LEDs; andadjusting the spectrum of light from the plurality of LEDs based at least in part on the measured color balance. 2. The method of claim 1, wherein the plurality of LEDs includes a first LED having a first color spectrum and a second LED having a second color spectrum that is different than the first color spectrum,wherein the delivering of the electrical pulses includes delivering a first pulsed electrical signal to the first light-emitting diode and delivering a second pulsed electrical signal to the second light-emitting diode,wherein the adjusting of the spectrum includes adjusting a pulse width of the first pulsed electrical signal relative to a pulse width of the second pulsed electrical signal to adjust the spectrum of light from the plurality of LEDs based at least in part on the measured color balance, andwherein the adjusting of the pulse widths also includes maintaining a constant intensity of the light from the plurality of LEDs while adjusting the spectrum of the light from the plurality of LEDs. 3. The method of claim 2, wherein the adjusting of the pulse widths further includes: generating a feedback signal based on the measured color balance from the video camera, andcontrolling the first color spectrum of the light from the first LED by adjusting an amount of current through the first LED based on the feedback signal. 4. The method of claim 2, further comprising receiving input from a user; andadjusting an average intensity of the plurality of LEDs based at least in part on the received input from the user. 5. The method of claim 2, wherein the plurality of LEDs includes a white LED. 6. The method of claim 2, wherein the adjusting of the spectrum of light from the plurality of LEDs includes separately controlling the first light-emitting diode having the first color spectrum and the second light-emitting diode having the second color spectrum in order to provide a desired overall hue or whiteness of combined light outputted by the first light-emitting diode and the second light-emitting diode. 7. The method of claim 1, wherein the adjusting of the spectrum of light from the plurality of LEDs comprises: generating a feedback signal based on the measured color balance of light from the plurality of LEDs; andcontrolling a color of light from the plurality of LEDs by adjusting an amount of current through the plurality of LEDs based on the feedback signal. 8. The method of claim 1, wherein the adjusting of the spectrum of light from the plurality of LEDs includes mirroring a current to change an amount of current applied from the pulses through the plurality of LEDs based on a variable amount of current controlling the mirroring. 9. The method of claim 1, wherein the adjusting of the spectrum of light from the plurality of LEDs also includes controlling a pulse width of the pulses that drive the plurality of LEDs based on a measured light output intensity of the plurality of LEDs. 10. The method of claim 1, wherein the device is a handheld electronic device, and wherein the device includes a DC voltage source that includes a battery within the electronic device. 11. An apparatus comprising: a device that includes an electronic video camera configured to output a video image signal;a measurement unit configured to measure a color balance of the video image signal;a plurality of light-emitting diodes (LEDs) mounted to the device, wherein the plurality of light-emitting diodes includes a first LED having a first characteristic spectrum and a second LED having a second characteristic spectrum, wherein the first characteristic spectrum is different from the second characteristic spectrum; anda control circuit, operably coupled to the measurement unit and to the plurality of LEDs, wherein the control circuit controls generation and delivery of a first pulsed electrical signal to the first LED and generation and delivery of a second pulsed electrical signal to the second LED, wherein the control circuit controls a pulse width of at least the first pulsed electrical signal in order to change a proportion of light output having the first characteristic spectrum to that having the second characteristic spectrum based at least in part on the measured color balance of the video image signal. 12. The apparatus of claim 11, further comprising: a user interface that receives input from a user, wherein the control circuit also adjusts an average intensity of the plurality of LEDs based at least in part on the received input from the user. 13. The apparatus of claim 11, further comprising: a DC voltage source, wherein the control circuit maintains an intensity of light from the plurality of LEDs while minimizing power dissipation within the control circuit by not having a resistor in series with the plurality of LEDs and the DC power source. 14. The apparatus of claim 11, wherein the control circuit controls the pulse widths of the first pulsed electrical signal and the second pulsed electrical signal based on a measured light output intensity of the plurality of LEDs. 15. The apparatus of claim 11, further comprising: a DC voltage source, wherein the apparatus is a handheld electronic device and wherein the DC voltage source is a battery within the electronic device. 16. The apparatus of claim 11, wherein the plurality of LEDs includes a white LED. 17. The apparatus of claim 11, wherein the first LED and the second LED are controlled separately by the control circuit in order to provide a desired overall hue or whiteness of combined light outputted by the first light emitting diode and the second light emitting diode. 18. An apparatus comprising: a casing;a plurality of light-emitting diodes (LEDs) mounted to the casing, wherein the plurality of LEDs includes a first LED having a first characteristic spectrum and a second LED having a second characteristic spectrum, wherein the first characteristic spectrum is different from the second characteristic spectrum;a user interface that receives input from a user; anda control circuit, operably coupled to the user interface and to the plurality of LEDs, wherein the control circuit controls generation and delivery of a first pulsed electrical signal to the first LED and generation and delivery of a second pulsed electrical signal to the second LED, wherein the control circuit controls a first characteristic of light of at least the first pulsed electrical signal based at least in part on received input from the user while the control circuit maintains an intensity of light from the plurality of LEDs. 19. The apparatus of claim 18, further comprising: a camera mounted to the casing, wherein the camera captures at least one image of a scene illuminated by the plurality of LEDs;a measurement unit configured to measure a color balance of the at least one image, wherein the control circuit controls a pulse width of at least the first pulsed electrical signal in order to change a proportion of light output having the first characteristic spectrum to that having the second characteristic spectrum based at least in part on the measured color balance of the video image signal. 20. The method of claim 1, wherein the adjusting of the spectrum of light from the plurality of LEDs comprises maintaining a constant intensity of the light from the LEDs while adjusting the spectrum of the light from the plurality of LEDs.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (120)
Amir Israel (Ewing NJ), 3D imaging of a substrate using perpendicular scanning directions.
Yamaguchi Keiki (Tokyo JPX) Hasumi Masahiko (Tokyo JPX) Tomita Shozo (Tokyo JPX) Gow Edward L. (Tokyo JPX), Apparatus for recording CT images directly on a recording medium without using a CRT.
Nguyen Cap V. (Lantana FL) Fitzmorris Tyce (Lake Park FL) Espenhahn Eric (West Palm Beach FL) Kline Dale W. (Hatfield PA) Chang Roger (Fort Lauderdale FL), Article inspection system for analyzing end and adjacent sides.
Copeland John (1230 Alameda De Las Pulgas Apt. 3 Belmont CA 94002), Bicycle single-wire lighting system with steady-flashing-reflector rear warning device.
Hanson George E. (Cedar Rapids IA), Chromatic ranging method and apparatus for reading optically readable information over a substantial range of distances.
Jacobsen, Jeffrey; Fan, John C. C.; Pombo, Stephen A.; Zavracky, Matthew; Bumgardner, Rodney; Richard, Alan; Chern, Wen-Foo, Color display system for a camera.
Scrivo Leonard (Tuckahoe NY) Binner Paul (Dumont NJ) Weinstein Louis (Yardley PA), Electrically isolated control means for the illuminating source of a dental drill.
Cochran Don W. (Highland Heights OH) Austin James R. (Mentor-on-the-Lake OH), Engineered lighting system for TDI inspection comprising means for controlling lighting elements in accordance with spec.
Jain Kantilal (18 Algonquian Trail Briarcliff Manor NY 10510), Illumination system to produce self-luminous light beam of selected cross-section, uniform intensity and selected numeri.
Toyonaga Shuji (Kawasaki JPX) Gemma Takashi (Tokyo JPX), Interferometer for observing the interference pattern of a surface under test utilizing an adjustable aperture stop.
Frank Alan M. (Livermore CA) Edwards William R. (Modesto CA granted to U.S. Department of Energy under the provisions of 42 U.S.C. 2182), Long lifetime, low intensity light source for use in nighttime viewing of equipment maps and other writings.
Maeda Shunji,JPX ; Nakayama Yasuhiko,JPX ; Yoshida Minoru,JPX ; Kubota Hitoshi,JPX ; Oka Kenji,JPX, Manufacturing method of semiconductor substrate and method and apparatus for inspecting defects of patterns of an object to be inspected.
Womack Kenneth H. (Rochester NY) Kwarta Brian J. (Pittsford NY) Outterson David H. (Victor NY) Reda James R. (Rochester NY), Method and apparatus for digital morie profilometry calibrated for accurate conversion of phase information into distanc.
Chadwick Curt H. (Los Gatos CA) Sholes Robert R. (Ben Lomond CA) Greene John D. (Santa Cruz CA) Tucker ; III Francis D. (Menlo Park CA) Fein Michael E. (Mountain View CA) Jann P. C. (Mountain View CA, Method and apparatus for optical inspection of substrates.
Bilodeau Steve (Setauket NY) Jacovino Frank (Plainview NY) Cameron Joanne (Oakdale NY) Cain James (Calverton NY), Method for coplanarity inspection of package or substrate warpage for ball grid arrays, column arrays, and similar struc.
Collet-Beillon Olivier (27 Avenue de Brimont 78400-Chatou FRX), Method of inspecting an array of solder ball connections of an integrated circuit module.
Juengel Richard O. (Romeo MI), Optical data system having flash/receiver head for energizing/receiving information from a battery operated transmitter.
Juengel Richard O. (Romeo MI), Optical data system having flash/receiver head for energizing/receiving information from a battery operated transmitter.
Bieman Leonard H. (Farmington Hills MI) Michniewicz Mark A. (Milford MI), System for optically measuring the surface contour of a part using more fringe techniques.
Svetkoff Ronald J. (Ann Arbor MI) Rohrer Donald K. (Whitmore Lake MI) Kelley Robert W. (Ann Arbor MI), Triangulation-based 3D imaging and processing method and system.
Raposo, Danny; Carter, James; Fournier, Gregory; Murdock, James; Potucek, Kevin, Lighting system for an environment and a control module for use therein.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.