|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||G02F-001/133.5 H01J-005/16 F21V-009/14 G01D-011/28 F21S-014/00|
|미국특허분류(USC)||349/065 ; 349/061 ; 349/062 ; 313/110 ; 362/019 ; 362/026 ; 362/257|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 120 인용 특허 : 49|
A light source for illuminating a display panel comprises a light-emitting device such as an incandescent light bulb or LED array disposed within a cavity having diffusely reflecting walls and an aperture. In one embodiment, a diffuser and brightness enhancing film are situated proximate the opening of the aperture which illuminates the display. Preferably, light emerging from the aperture is substantially uniform in intensity and color, and in one embodiment, a color filter is employed to whiten the light emerging from the aperture. The ratio of the are...
[ What is claimed is:] [1.]1. An apparatus for providing a substantially uniform distribution of light across a two-dimensional region, said apparatus comprising:an optical cavity formed by a member comprising first and second end portions and first and second side portions, the first end portion adapted for mounting a light source for illuminating the optical cavity, said member having a bottom portion which forms a central bottom surface of the optical cavity, said optical cavity having an aperture for outputting light from the cavity to illuminate sai...