IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
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| 국제특허분류(IPC7판) |
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| 출원번호 |
UP-0337170
(2006-01-19)
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| 등록번호 |
US-7733310
(2010-06-29)
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발명자
/ 주소 |
- Hajjar, Roger A.
- Kindler, David
- Tan, Patrick
- Kent, David
- Malyak, Phillip H.
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| 출원인 / 주소 |
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| 대리인 / 주소 |
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| 인용정보 |
피인용 횟수 :
14 인용 특허 :
132 |
초록
▼
Fluorescent screens and display systems and devices based on such screens using at least one excitation optical beam to excite one or more fluorescent materials on a screen which emit light to form images. The fluorescent materials may include phosphor materials and non-phosphor materials such as qu
Fluorescent screens and display systems and devices based on such screens using at least one excitation optical beam to excite one or more fluorescent materials on a screen which emit light to form images. The fluorescent materials may include phosphor materials and non-phosphor materials such as quantum dots. A screen may include a multi-layer dichroic layer.
대표청구항
▼
What is claimed is: 1. A device, comprising a display screen and an optical module that includes one or more lasers producing excitation light of one or more optical excitation beams modulated to carry optical pulses carrying images and scans the excitation light onto the display screen in a two di
What is claimed is: 1. A device, comprising a display screen and an optical module that includes one or more lasers producing excitation light of one or more optical excitation beams modulated to carry optical pulses carrying images and scans the excitation light onto the display screen in a two dimensional pattern to direct the optical pulses at different locations on the display screen to display the images, wherein the display screen further comprises: a fluorescent layer that absorbs excitation light to emit visible light, comprises a plurality of different fluorescent materials which absorb the excitation light to emit light at different visible wavelengths which are different in wavelength from the excitation light, and is patterned into parallel stripes, wherein three adjacent stripes are made of three different fluorescent materials and emit light at three different visible wavelengths, respectively, and define a color pixel dimension of the display screen, a first layer on a first side of the fluorescent layer to transmit the excitation light and to reflect the visible light, the first layer comprising a composite film stack of multiple polymer films that are coextruded to have alternating high and low refractive indices to form an optical interference filter, a second layer on a second side of the fluorescent layer to transmit the visible light and to block the excitation light, and a Fresnel lens located on the first side of the fluorescent layer to direct the excitation light of the one or more optical excitation beams scanned by the optical module at different incident angles at different locations on the display screen to be approximately normal to the first layer and the fluorescent layer. 2. The device as in claim 1, wherein the fluorescent layer comprises a phosphor material. 3. The device as in claim 2, wherein the phosphor material comprises nanoscale phosphor grains. 4. The device as in claim 2, wherein the phosphor material absorbs excitation light at an ultra violet wavelength. 5. The device as in claim 2, wherein the phosphor material absorbs excitation light at a violet wavelength. 6. The device as in claim 2, wherein the phosphor material absorbs excitation light at a wavelength less than 420 nm. 7. The device as in claim 2, wherein the fluorescent layer comprises a non-phosphor fluorescent material. 8. The device as in claim 7, wherein the fluorescent material comprises quantum dots. 9. The device as in claim 7, wherein the non-phosphor fluorescent material absorbs excitation light at an ultra violet wavelength. 10. The device as in claim 7, wherein the non-phosphor fluorescent material absorbs excitation light at a violet wavelength. 11. The device as in claim 7, wherein the non-phosphor fluorescent material absorbs excitation light at a wavelength less than 420 nm. 12. The device as in claim 1, wherein the Fresnel lens is in a telecentric configuration for the incident excitation light. 13. The device as in claim 1, wherein the display screen comprises a contrast enhancing layer formed over the second layer that comprises different filtering regions that spatially match the fluorescent stripes to receive and filter emitted visible light from the fluorescent layer, where each filtering region transmits light of a color that is emitted by a corresponding matching fluorescent stripe and blocks light of other colors. 14. The device as in claim 1, wherein each fluorescent stripe includes a boundary that separates the fluorescent stripe from an adjacent fluorescent stripe and is optically reflective. 15. The device as in claim 1, wherein each fluorescent stripe includes a boundary that separates the fluorescent stripe from an adjacent fluorescent stripe and is optically absorbent. 16. A device, comprising: a display screen comprising a fluorescent layer that absorbs excitation light to emit visible light, wherein the fluorescent layer comprises a plurality of parallel fluorescent stripes, wherein at least three adjacent phosphor stripes are made of three different fluorescent materials: a first fluorescent material to absorb the excitation light to emit light of a first color, a second fluorescent material to absorb the excitation light to emit light of a second color, and a third fluorescent material to absorb the excitation light to emit light of a third color, the display screen further comprising dividers formed at boundaries between two adjacent fluorescent stripes to separate different fluorescent stripes and configured to reduce an amount of light emitted by one fluorescent stripe that enters an adjacent fluorescent stripe, and an optical module that includes one or more lasers producing excitation light of one or more optical excitation beams modulated to carry optical pulses carrying images and scans the excitation light onto the display screen in a two dimensional pattern to direct the optical pulses at different locations on the display screen to display the images, wherein the display screen further comprises a screen gain layer which modifies light emitted by the fluorescent layer, and wherein the screen gain layer comprises a diffractive optical element. 17. A device, comprising: a display screen comprising a fluorescent layer that absorbs excitation light to emit visible light, wherein the fluorescent layer comprises a plurality of parallel fluorescent stripes, wherein at least three adjacent phosphor stripes are made of three different fluorescent materials: a first fluorescent material to absorb the excitation light to emit light of a first color, a second fluorescent material to absorb the excitation light to emit light of a second color, and a third fluorescent material to absorb the excitation light to emit light of a third color, the display screen further comprising dividers formed at boundaries between two adjacent fluorescent stripes to separate different fluorescent stripes and configured to reduce an amount of light emitted by one fluorescent stripe that enters an adjacent fluorescent stripe, and an optical module that includes one or more lasers producing excitation light of one or more optical excitation beams modulated to carry optical pulses carrying images and scans the excitation light onto the display screen in a two dimensional pattern to direct the optical pulses at different locations on the display screen to display the images, wherein the display screen further comprises: a first layer on a first side of the fluorescent layer to transmit the excitation light and to reflect the visible light, and a second layer on a second side of the fluorescent layer to transmit visible light and to block the excitation light, wherein the first layer comprises a composite film stack of polymer films that are coextruded to have alternating high and low refractive indices and form an optical interference filter. 18. A device, comprising: a display screen comprising a fluorescent layer that absorbs excitation light to emit visible light, wherein the fluorescent layer comprises a plurality of parallel fluorescent stripes, wherein at least three adjacent phosphor stripes are made of three different fluorescent materials: a first fluorescent material to absorb the excitation light to emit light of a first color, a second fluorescent material to absorb the excitation light to emit light of a second color, and a third fluorescent material to absorb the excitation light to emit light of a third color, the display screen further comprising dividers formed at boundaries between two adjacent fluorescent stripes to separate different fluorescent stripes and configured to reduce an amount of light emitted by one fluorescent stripe that enters an adjacent fluorescent stripe, and an optical module that includes one or more lasers producing excitation light of one or more optical excitation beams modulated to carry optical pulses carrying images and scans the excitation light onto the display screen in a two dimensional pattern to direct the optical pulses at different locations on the display screen to display the images, wherein the display screen further comprises: a lens layer formed on the fluorescent layer, the lens layer comprising a plurality of cylindrical lenses having cylindrical axes parallel to the fluorescent stripes and being positioned to correspond to the fluorescent stripes, respectively, and a reflective layer coated on a lens surface of each cylindrical lens that faces the fluorescent layer and configured to have a slit aperture along the cylindrical axis of the cylindrical lens to transmit the excitation light while the excitation light entering at other positions of the cylindrical lens is blocked by the reflective layer. 19. A display device, comprising: a carrier layer optically transparent to at least light of an excitation wavelength; a lens array layer formed on a first surface of the carrier layer to include a plurality of lenses; a reflector array layer optically transparent to the light of the excitation wavelength and formed on a second, opposite surface of the carrier layer to include a plurality of reflectors that spatially correspond to the lenses in the lens array layer, respectively, each reflector comprising a concave reflective surface facing away from the lens array layer and the carrier layer to reflect light and an aperture in the concave reflective surface at or near a center of each reflector to receive light of the excitation wavelength; and a fluorescent layer formed over the reflector array layer to include different fluorescent areas spatially corresponding to different reflectors to receive the light of the excitation wavelength that passes through the concave reflective surfaces of the reflectors, each fluorescent area comprising a fluorescent material to absorb the light of the excitation wavelength and to emit visible light. 20. The device as in claim 19, further comprising: an input lens placed away from the lens array layer to direct the light of the excitation to be perpendicular to the lens array layer. 21. The device as in claim 20, wherein the input lens is a Fresnel lens. 22. The device as in claim 19, wherein the lenses in the lens array layer are a plurality of cylindrical lenses having cylindrical axes parallel to one another, and wherein the fluorescent layer comprises parallel fluorescent stripes positioned to spatially correspond to the cylindrical lenses, respectively. 23. The device as in claim 22, wherein each aperture in each reflector of the reflector array layer is a slit aperture along the cylindrical axis of the cylindrical lens. 24. The device as in claim 19, wherein edges in the reflector array layer between adjacent reflectors are blackened to reduce mixing of light emitted from different fluorescent areas. 25. The device as in claim 19, further comprising an optical filler material filled between the concave reflective surfaces and the fluorescent layer. 26. The device as in claim 19, wherein there is no material filled between the concave reflective surfaces and the fluorescent layer. 27. The device as in claim 19, further comprising a supporting substrate engaged to the reflector array layer to receive light from the reflector array layer, wherein the fluorescent layer is deposited on the supporting substrate. 28. The device as in claim 19, wherein each lens in the lens array layer has a focus at the aperture of a corresponding reflector in the reflector array layer. 29. The device as in claim 19, wherein the fluorescent layer comprise a phosphor material. 30. The device as in claim 29, wherein the phosphor material comprises nanoscale phosphor grains. 31. The device as in claim 19, wherein the fluorescent layer comprises a non-phosphor fluorescent material. 32. The device as in claim 31, wherein the non-phosphor fluorescent material comprises quantum dots. 33. The device as in claim 19, further comprising a contrast enhancing layer formed over the fluorescent layer to comprise a plurality of different filtering areas that spatially match the fluorescent areas of the fluorescent layer, where each filtering area transmits light of a color that is emitted by a corresponding matching fluorescent area and blocks light of other colors. 34. A method, comprising: providing a structure which comprises a carrier layer optically transparent to at least light of an excitation wavelength, a lens array layer formed on a first surface of the carrier layer to include a plurality of lenses, and a reflector array layer formed on a second, opposite surface of the carrier layer to include a plurality of reflector areas that spatially correspond to the lenses in the lens array layer, respectively, each reflector area comprising a surface facing away from the lens array layer and the carrier layer; forming a photoresist layer on the concave surface of each reflector area; using the lenses in the lens array layer to direct and focus light through each individual lens onto a focus location on the photoresist layer to expose the illuminated photoresist at the focus location; removing unexposed photoresist on the surfaces of the reflector areas in the reflector array layer; depositing a layer of a reflective material on to a top surface of the exposed photoresist at the focus location in the concave surface of each reflector area and on remaining areas of the surface in each reflector area; and removing the exposed photoresist at the focus location in the surface of each reflector area to remove the reflective material thereon, thus forming an aperture at the focus location and a reflective surface in the remaining areas of the concave surface in each reflector area. 35. The method as in claim 34, further comprising: forming a phosphor layer formed over the reflector array layer to include different phosphor areas spatially corresponding to different reflectors to receive the light of the excitation wavelength that passes through the reflective surfaces of the reflectors. 36. The method as in claim 34, wherein the surface of each reflector area is a concave surface. 37. The method as in claim 34, wherein the surface of each reflector area is not a concave surface. 38. The method as in claim 34, wherein the surface of each reflector area includes at least two different surfaces. 39. A device, comprising an optical module and a screen which comprises: a substrate; a light-emitting layer formed on the substrate and comprising a plurality of fluorescent regions formed on the substrate, wherein at least two adjacent fluorescent regions include two different fluorescent materials that absorb excitation light to emit light at two different colors; a contrast enhancing layer formed over the light-emitting layer comprising the fluorescent regions and comprising a plurality of different filtering regions that spatially match the fluorescent regions, where each filtering region transmits light of a color that is emitted by a corresponding matching fluorescent region and blocks light of other colors; and a composite film stack positioned in an optical path of the excitation light between the light-emitting layer and the optical module to receive the excitation light from the optical module and to transmit the excitation light to the light-emitting layer, the composite film stack reflecting the colored light emitted by the light-emitting layer, wherein the optical module is positioned relative to the screen and includes one or more lasers producing excitation light of one or more optical excitation beams modulated to carry optical pulses carrying images, the optical module scanning the excitation light onto the display screen in a two dimensional pattern to direct the optical pulses at different locations on the display screen to display the images. 40. The device as in claim 39, wherein the fluorescent materials comprise phosphor materials. 41. The device as in claim 40, wherein the phosphor materials comprise nanoscale phosphor grains. 42. The device as in claim 39, wherein the fluorescent materials comprise non-phosphor fluorescent materials. 43. The device as in claim 42, wherein the non-phosphor fluorescent materials comprise quantum dots. 44. The device as in claim 39, wherein the composite film stack comprises films which have different refractive indices between two adjacent films and are laminated or fused with one another to transmit the excitation light and to reflect the colored light emitted by the light-emitting layer.
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