LED backlight and liquid crystal display device using thereof

Details LED backlight and liquid crystal display device using thereof LED backlight and liquid crystal display device using thereof

2011-03-15

2011-03-15

Lee, Jong-Suk (James) (Department: 2885)

Illumination

Illuminated scale or dial

Edge illuminated modifier or light rod/pipe

C362S027000, C362S600000, C362S606000, C362S610000, C362S612000

Reexamination Certificate

active

07905613

ABSTRACT:
An object of the present invention is to improve the color reproduction capability of a liquid crystal display backlight using white LEDs.A backlight of the present invention includes: a light guide plate6; a light diffusing optical waveguide3disposed adjacent the light guide plate6; a plurality of white LEDs1disposed on the light diffusing optical waveguide3; and single color LEDs (red LEDs)2disposed on respective opposite sides of the light diffusing optical waveguide3; wherein light from the white LEDs1passes through the light diffusing optical waveguide3and enters the light guide plate6through a side thereof, whereas light from the single color LEDs2is diffused by the light diffusing optical waveguide3before entering the light guide plate6through the same side thereof. Thus, the light diffusing optical waveguide3mixes light from the white LEDs1and single color LEDs2, resulting in improved color reproduction capability of the backlight.

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