Color-filterless liquid crystal display device
AssigneeLG. Philips LCD Co., Ltd.
InventorJeong Min Moon
Life of this patent
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Abstract
A color-filterless liquid crystal display device is capable of realizing a full color without any color filters in sub-pixels of the display. In the device, a three primary color selector is arranged at a light incident surface of a light guide to generate three primary color light beams sequentially, color-by-color. The three primary color selector may be provided on one or more sides of a light guide in a back light, or it may be provided above the back light. Use of a color filter is eliminated to reduce a manufacturing cost and improve a process yield and an aperture ratio of the device. Also, independent light sources corresponding to three primary colors are replaced by a single light source, so that light utilization efficiency may be optimized and a slim-type LCD may be provided.
Claims24
A liquid crystal display device, comprising:
- a liquid crystal panel;
- a light source to generate light for illuminating the liquid crystal panel;
- a light guide to guide light from the light source to the liquid crystal panel;
- and
- a three primary color selector, having only one light selection member, optically coupled to the light source to sequentially generate three original color light beams from incident light from the light source.
A back light unit for use in a display device, the unit comprising:
- a light source to generate light;
- a light guide to guide light from the light source;
- and
- a color selector, having only one light selection member, arranged in an optical path of the light source to sequentially transmit a plurality of colors within incident light from the light source.
A liquid crystal display device, comprising:
- a liquid crystal panel;
- a light source to generate light for illuminating the liquid crystal panel;
- a light guide to guide light from the light source to the liquid crystal panel;
- a three primary color selector, arranged between the light guide and the liquid crystal panel, and optically coupled to the light source to sequentially generate three original color light beams from incident light from the light source, said light source being arranged at an end of the light guide, which re-directs light upward toward the three primary color selector;
- another light source arranged at another end of the light guide;
- and another three original color selector arranged between the another light source and the light guide to sequentially generate three original color light beams from incident light from the another light source.
Dependencies are inferred from the claim text.