Backlight apparatus reduced in thickness

Details Backlight apparatus reduced in thickness Backlight apparatus reduced in thickness

2007-03-27

2007-03-27

Husar, Stephen F (Department: 2875)

Illumination

Illuminated scale or dial

Edge illuminated modifier or light rod/pipe

C362S612000, C362S613000, C362S618000, C362S097200, C349S065000, C349S068000

Reexamination Certificate

active

11059406

ABSTRACT:
In a backlight apparatus for an LCD, a plurality of bar-shaped first LED light sources are arranged on the reflective plate to laterally emit light. A plurality of light shades are arranged above the first light sources. A transparent plate is placed above the light shades. Scattering patterns are formed in the bottom of the transparent plate in positions corresponding to the light shades. A bar-shaped second LED light source is arranged at a side of the transparent plate to emit light into the transparent plate. The light source arranged at the side of the transparent plate prevents the formation of dark areas as a problem in the prior art, thereby enhancing the entire uniformity of light. Then, the backlight apparatus can be maintained thin even when applied to a large-sized LCD.

REFERENCES:
patent: 6883950 (2005-04-01), Adachi et al.
patent: 6969189 (2005-11-01), Lee et al.

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