Liquid crystal display device

Details Liquid crystal display device Liquid crystal display device

2005-10-25

2005-10-25

Nguyen, Dung T. (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

C349S110000, C349S114000, C349S119000

Reexamination Certificate

active

06958793

ABSTRACT:
In a transflective liquid crystal display device including a transmissive portion and a reflective portion in each pixel, the width of portions of a black matrix that are opposed to respective side portions of the transmissive portion is set greater than the width of portions of the black matrix that are opposed to respective side portions of the reflective portion. This measure prevents a phenomenon that leakage light coming from slant portions located on both sides of the transmissive portion or specular reflective light coming from flat portions would otherwise be mixed into reflective light from the reflective portion. As a result, highly legible, high-quality display without any glare can be realized. Contrast ratio evaluation results were such that the contrast ratio was 74 in the reflective mode and 194 in the transmissive mode. That is, high-contrast display was obtained in both of the reflective mode and the transmissive mode.

REFERENCES:
patent: 6639639 (2003-10-01), Baek et al.
patent: 2003/0076464 (2003-04-01), Ozawa et al.
patent: 2000-187220 (2000-07-01), None

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