Transflective liquid-crystal-display device with pair switching device
First Claim
Patent Images
1. A transflective liquid-crystal-display (LCD) device comprising:
- a liquid crystal (LC) layer defining a plurality of pixels each having a transmissive area and a reflective area, at least said transmissive area operating in a lateral-electric-field mode;
first and second polarizing films sandwiching therebetween said LC layer, said first polarizing film being effective common to said transmissive area and said reflective area, said second polarizing film being effective only to said transmissive area; and
a retardation film sandwiched between said first polarizing film and said LC layer,wherein each of said pixels includes a pixel electrode driven by a pixel data signal supplied in common to said transmissive area and said reflective area, a first common electrode driven by a first common signal supplied in common to said reflective areas of said plurality of pixels, and a second common electrode driven by a second common signal supplied in common to said transmissive areas of said plurality of pixels,wherein said first and second common signals are inverted in synchrony with a synchronizing signal, and said first common signal is substantially an inverted signal of said second common signal.
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Abstract
A LCD device has a LC layer sandwiched between a TFT substrate and a counter substrate, first and second polarizing films, a first λ/2 film between the first polarizing film and the counter substrate, and a second λ/2 film between the second polarizing film and the TFT substrate. Angle θ1 between the direction of the optical axis of the LC layer and the polarized direction of the light entering the LC layer satisfies the relationship: 0 degree<θ1<45 degrees. The resultant LCD device has lower leakage light and coloring.
10 Citations
19 Claims
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1. A transflective liquid-crystal-display (LCD) device comprising:
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a liquid crystal (LC) layer defining a plurality of pixels each having a transmissive area and a reflective area, at least said transmissive area operating in a lateral-electric-field mode; first and second polarizing films sandwiching therebetween said LC layer, said first polarizing film being effective common to said transmissive area and said reflective area, said second polarizing film being effective only to said transmissive area; and a retardation film sandwiched between said first polarizing film and said LC layer, wherein each of said pixels includes a pixel electrode driven by a pixel data signal supplied in common to said transmissive area and said reflective area, a first common electrode driven by a first common signal supplied in common to said reflective areas of said plurality of pixels, and a second common electrode driven by a second common signal supplied in common to said transmissive areas of said plurality of pixels, wherein said first and second common signals are inverted in synchrony with a synchronizing signal, and said first common signal is substantially an inverted signal of said second common signal.
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2. A transflective liquid-crystal-display (LCD) device comprising:
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a liquid crystal (LC) layer defining a plurality of pixels each having a transmissive area and a reflective area, at least said transmissive area operating in a lateral-electric-field mode; first and second polarizing films sandwiching therebetween said LC layer, said first polarizing film being effective common to said transmissive area and said reflective area, said second polarizing film being effective only to said transmissive area; and a retardation film sandwiched between said first polarizing film and said LC layer, wherein each of said pixels includes a pixel electrode driven by a pixel data signal supplied in common to said transmissive area and said reflective area, a first common electrode driven by a first common signal supplied in common to said reflective areas of said plurality of pixels, and a second common electrode driven by a second common signal supplied in common to said transmissive areas of said plurality of pixels, wherein each of said pixels includes a first pixel electrode in said transmissive area, a second pixel electrode in said reflective area, a first switch for supplying a data signal to said first pixel electrode, and a second switch for supplying said data signal to said second pixel electrode. - View Dependent Claims (3, 4, 5, 6, 7)
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8. A transflective liquid-crystal-display (LCD) device comprising:
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a liquid crystal (LC) layer defining a plurality of pixels each having a transmissive area and a reflective area, at least said transmissive area operating in a lateral-electric-field mode; first and second polarizing films sandwiching therebetween said LC layer, said first polarizing film being effective common to said transmissive area and said reflective area, said second polarizing film being effective only to said transmissive area; and a retardation film sandwiched between said first polarizing film and said LC layer, wherein each of said pixels includes a pixel electrode driven by a pixel data signal supplied in common to said transmissive area and said reflective area, a first common electrode driven by a first common signal supplied in common to said reflective areas of said plurality of pixels, and a second common electrode driven by a second common signal supplied in common to said transmissive areas of said plurality of pixels, wherein each of said pixels includes a first pixel electrode in said transmissive area, a second pixel electrode in said reflective area, a first switching device for supplying a data signal to said first pixel electrode, and a second switch for supplying said data signal to said second pixel electrode. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification