Method and device to improve backlight uniformity

Details Method and device to improve backlight uniformity Method and device to improve backlight uniformity

2007-07-19

2008-11-04

Alavi, Ali (Department: 2875)

Illumination

Edge lighted panel

Light modifier with emission face combined with light guide...

C362S607000, C362S618000

Reexamination Certificate

active

07445367

ABSTRACT:
A hot spot filter for a light guide is created by taking an image of the light output pattern of an illuminated light guide. The hot spot filter may be a film, a layer, or an additional liquid crystal display dedicated to attenuating bright spots from the light guide. The hot spot filter may be incorporated into the image display by adjusting the grey scale of individual pixels to provide sufficient compensation.

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patent: 2002/0163529 (2002-11-01), Evanicky
patent: 2004/0263718 (2004-12-01), Tsai
patent: 2005/0030732 (2005-02-01), Kimura et al.
patent: 0571173 (1993-11-01), None
patent: 03009306 (1991-01-01), None
patent: 2002008423 (2002-01-01), None

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