Illuminating device and liquid crystal display apparatus
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F21V-007/04
F21V-007/00
출원번호
US-0064461
(2005-02-23)
등록번호
US-7497609
(2009-03-03)
발명자
/ 주소
Maeda,Satoshi
Aritake,Hirokazu
출원인 / 주소
Fujitsu Limited
Sharp Kabushiki Kaisha
대리인 / 주소
Greer, Burns & Crain, Ltd.
인용정보
피인용 횟수 :
8인용 특허 :
19
초록▼
An illuminating device comprises a pair of light sources and a rod-like photoconductor. The rod-like photoconductor includes a pair of planes of incidence entered by the light from the light sources, a reflection surface having a plurality of prisms and an exit plane located opposite to the reflecti
An illuminating device comprises a pair of light sources and a rod-like photoconductor. The rod-like photoconductor includes a pair of planes of incidence entered by the light from the light sources, a reflection surface having a plurality of prisms and an exit plane located opposite to the reflection surface. The width between the reflection surface and the exit plane at the planes of incidence of the rod-like photoconductor is smaller than the width of the light sources in the same direction. As a result, the brightness distribution of the light exiting from the rod-like photoconductor becomes uniform. The illuminating device is combined with a plate-like photoconductor to make up a planar illuminating device. Also, the illuminating device is combined with a liquid crystal panel to make up a liquid crystal display apparatus.
대표청구항▼
The invention claimed is: 1. A display apparatus comprising: a plate photoconductor; a display panel adjacent to the plate photoconductor; and an illuminating device, wherein the illuminating device further comprises: a light source; and a rod photoconductor providing light to the plate photoconduc
The invention claimed is: 1. A display apparatus comprising: a plate photoconductor; a display panel adjacent to the plate photoconductor; and an illuminating device, wherein the illuminating device further comprises: a light source; and a rod photoconductor providing light to the plate photoconductor, wherein the rod photoconductor includes a plane of incidence entered by light from the light source, a reflection surface having a plurality of prisms and an exit plane located opposite to the reflection surface, wherein a width between the reflection surface and the exit plane at the plane of incidence of the rod photoconductor is smaller than a width of a light emission surface of the light source, the width between the reflection surface and the exit plane at the plane of incidence of the rod photoconductor being a width in a first direction from the reflection surface to the exit plane of the rod photoconductor, the width of the light emission surface of the light source being a width in the first direction, and wherein the reflection surface of the rod photoconductor is formed of a convex surface defined by a linear central portion between two linear tapered portions, such that an entire outer surface of the reflection surface is completely defined by the central portion and the tapered portions. 2. A display apparatus according to claim 1, wherein a width between the reflection surface and the exit plane at a central portion of the rod photoconductor is larger than the width between the reflection surface and the exit plane at an end portion of the rod photoconductor. 3. A display apparatus according to claim 1, wherein the plurality of prisms on the reflection surface of the rod photoconductor are formed in such a manner as to emit the light from the exit plane substantially at right angles thereto. 4. A display apparatus according to claim 1, wherein the center of the light source is displaced from the center of a corresponding plane of incidence of the rod photoconductor. 5. A display apparatus according to claim 4, wherein the light source is displaced toward the exit plane of said rod photoconductor from the center of the corresponding plane of incidence of the rod photoconductor. 6. A display apparatus according to claim 1, wherein the reflection surface includes a reflection means. 7. A display apparatus according to claim 6, wherein the reflection means is integrally configured. 8. A display apparatus comprising: a plate photoconductor; a display panel adjacent to the plate photoconductor; and an illuminating device, wherein the illuminating device further comprises: a light source; and a rod photoconductor providing light to the plate photoconductor; wherein the rod photoconductor includes a plane of incidence entered by light from the light source, a reflection surface having a plurality of prisms and an exit plane located opposite to the reflection surface, wherein the plate photoconductor includes a plane of incidence entered by the light from the exit plane of the rod photoconductor and another exit plane, wherein a width between the reflection surface and the exit plane at the plane of incidence of the rod photoconductor is smaller than a width of a light emission surface of the light source, the width between the reflection surface and the exit plane at the plane of incidence of the rod photoconductor being a width in a first direction from the reflection surface to the exit plane of the rod photoconductor, the width of the light emission surface of the light source being a width in the first direction, and wherein the reflection surface of the rod photoconductor is formed of a convex surface defined by a linear central portion between two linear tapered portions, such that an entire outer surface of the reflection surface is completely defined by the central portion and the tapered portions. 9. A display apparatus according to claim 8, wherein a width between the reflection surface and the exit plane at a central portion of the rod photoconductor is larger than the width between the reflection surface and the exit plane at an end portion of the rod photoconductor. 10. A display apparatus according to claim 8, wherein the plurality of prisms on the reflection surface of the rod photoconductor are formed in such a manner as to emit the light from the exit plane substantially at right angles thereto. 11. A display apparatus according to claim 8, wherein the center of the light source is displaced from the center of a corresponding plane of incidence of the rod photoconductor. 12. A display apparatus according to claim 11, wherein the light sources is displaced toward the exit plane of said rod photoconductor from the center of the corresponding plane of incidence of the rod photoconductor. 13. A display apparatus according to claim 8, wherein the reflection surface includes a reflection means. 14. A display apparatus according to claim 13, wherein the reflection means is integrally configured. 15. A display apparatus comprising: a plate photoconductor; a display panel adjacent to the plate photoconductor; and an illuminating device, wherein the illuminating device further comprises: a light emitting diode (LED) light source; and a rod photoconductor providing light to the plate photoconductor, wherein the rod photoconductor includes a plane of incidence entered by light from the light source, a reflection surface having a plurality of prisms and an exit plane located opposite to the reflection surface, and wherein a width between the reflection surface and the exit plane at the plane of incidence of the rod photoconductor is smaller than a width of a light emission surface of the light source, the width between the reflection surface and the exit plane at the plane of incidence of the rod photoconductor being a width in a first direction from the reflection surface to the exit plane of the rod photoconductor, the width of the light emission surface of the light source being a width in the first direction, and wherein the reflection surface of the rod photoconductor is formed of a convex surface defined by a linear central portion between two linear tapered portions, such that an entire outer surface of the reflection surface is completely defined by the central portion and the tapered portions. 16. A display apparatus according to claim 15, wherein a width between the reflection surface and the exit plane at a central portion of the rod photoconductor is larger than the width between the reflection surface and the exit plane at an end portion of the rod photoconductor. 17. A display apparatus according to claim 15, wherein the plurality of prisms on the reflection surface of the rod photoconductor are formed in such a manner as to emit the light from the exit plane substantially at right angles thereto. 18. A display apparatus according to claim 15, wherein the center of the light source is displaced from the center of a corresponding plane of incidence of the rod photoconductor. 19. A display apparatus according to claim 18, wherein the light source is displaced toward the exit plane of said rod photoconductor from the center of the corresponding plane of incidence of the rod photoconductor. 20. A display apparatus according to claim 15, wherein the reflection surface includes a reflection means. 21. A display apparatus according to claim 20, wherein the reflection means is integrally configured. 22. A display apparatus comprising according to claim 1, wherein the display panel is a liquid crystal display panel. 23. A display apparatus according to claim 8, wherein the display panel is a liquid crystal display panel. 24. A display apparatus according to claim 15, wherein the display panel is a liquid crystal panel.
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이 특허에 인용된 특허 (19)
Sonehara Tomio (Suwa JPX), Color display device using light shutter and color filters.
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