In-plane field type transflective liquid crystal display
First Claim
1. A liquid crystal display device comprising:
- an upper substrate;
a lower substrate;
a liquid crystal layer interposed between the upper substrate and the lower substrate;
an upper polarizer and a lower polarizer positioned at the upper and lower substrates respectively, with at least one of the polarizers being an extraordinary type polarizer;
a plurality of pixel regions, each pixel region comprising a pixel electrode and a common electrode, for applying a voltage to the liquid crystal layer;
wherein each pixel region includes a reflection region and a transmission region; and
all the pixel and common electrodes are positioned at either the upper substrate or the lower substrate.
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Abstract
A liquid crystal display device (10) includes an upper substrate (12), a lower substrate (14), and a liquid crystal layer (16) interposed between the upper substrate and the lower substrate. An upper polarizer (126) and a lower polarizer (146) are positioned at the upper and lower substrates respectively, with at least one of the polarizers being an extraordinary type polarizer. Each of pixel regions includes a pixel electrode (148a) and a common electrode (148b), for applying a voltage to the liquid crystal layer. Each pixel region defines a reflection region and a transmission region. All the pixel and common electrodes are positioned at the lower substrate. The display device works both in a reflection mode and a transmission mode, has a wide viewing angle, can work at high temperatures, and is relatively thin and compact.
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Citations
21 Claims
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1. A liquid crystal display device comprising:
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an upper substrate;
a lower substrate;
a liquid crystal layer interposed between the upper substrate and the lower substrate;
an upper polarizer and a lower polarizer positioned at the upper and lower substrates respectively, with at least one of the polarizers being an extraordinary type polarizer;
a plurality of pixel regions, each pixel region comprising a pixel electrode and a common electrode, for applying a voltage to the liquid crystal layer;
wherein each pixel region includes a reflection region and a transmission region; and
all the pixel and common electrodes are positioned at either the upper substrate or the lower substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A liquid crystal display device comprising:
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an upper substrate;
a lower substrate;
a liquid crystal layer interposed between the upper substrate and the lower substrate;
an upper polarizer and a lower polarizer positioned at the upper and lower substrates respectively, with at least one of the polarizers being an extraordinary type polarizer;
a plurality of pixel regions, each pixel region comprising a pixel electrode and a common electrode for applying a voltage to the liquid crystal layer, and each pixel region defining a reflection region and a transmission region; and
a color filter positioned at either the upper substrate or the lower substrate, and having different thicknesses in the reflection region and the transmission region of each pixel region;
wherein all the pixel and common electrodes are positioned at either the upper substrate or the lower substrate. - View Dependent Claims (15, 16)
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17. A liquid crystal display device comprising:
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an upper substrate;
a lower substrate;
a liquid crystal layer interposed between the upper substrate and the lower substrate;
two polarizers positioned at the upper and lower substrates respectively, and being made of a modified organic dye material which exists in a liquid crystalline phase;
a plurality of pixel regions, each pixel region comprising a pixel electrode and a common electrode for applying a voltage to the liquid crystal layer, and each pixel region defining a reflection region and a transmission region; and
a color filter positioned at either the upper substrate or the lower substrate, the color filter in each pixel region having a part in the reflection region with no color dye therein;
wherein all the pixel and common electrodes are positioned at either the upper substrate or the lower substrate. - View Dependent Claims (18, 19, 20, 21)
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Specification