System and method for providing a uniform backlight

Details System and method for providing a uniform backlight System and method for providing a uniform backlight

2007-06-06

2010-06-08

O'Shea, Sandra L (Department: 2875)

Illumination

Plural light sources

With modifier

C362S373000, C362S332000, C362S633000, C362S224000, C362S294000, C362S612000

Reexamination Certificate

active

07731391

ABSTRACT:
An illumination system includes an illumination source such as an array of LED's over which is provided a diffuser. The illumination source provides light which, because of light refraction, radiates generally uniformly from edge to edge of the diffuser. The diffuser may be a planar flat piece of may include a hollow, cup like structure formed by a frame with a cover. The illumination system may be scaled up to provide multiple such illumination devices side by side to provide a greater area or strength of illumination. Multiple systems may utilize multiple diffusers or a single diffuser covering multiple illumination sources. The illumination source may be mounted to a backplate or heatsink which is larger than the illumination source to facilitate the addition of further electronic circuitry and or mounting capabilities.

REFERENCES:
patent: 5416683 (1995-05-01), McCarthy
patent: 5607227 (1997-03-01), Yasumoto et al.
patent: 5936353 (1999-08-01), Triner et al.
patent: 2003/0174517 (2003-09-01), Kiraly et al.
patent: 2005/0270766 (2005-12-01), Kung et al.
patent: 2007/0103939 (2007-05-01), Huang et al.
patent: 20 2004 009194 (2004-12-01), None
07109782.8-2423—European Search Report, Oct. 15, 2007, European Patent Office.

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