Transflective Liquid Crystal Display Device
First Claim
1. A transflective liquid crystal display device including a liquid crystal display panel, the liquid crystal display panel comprising:
- a pair of substrates;
liquid crystal which is sandwiched between the pair of substrates;
a plurality of sub pixels each of which includes a transmissive portion and a reflective portion;
each sub pixel having a pixel electrode formed on one substrate out of the pair of substrates and a counter electrode formed on one substrate, the pixel electrode being arranged in common in the transmissive portion and the reflective portion and the counter electrode being arranged individually in the transmissive portion and the reflective portion in one sub pixel, the pixel electrode and the counter electrode generating an electric field therebetween thus driving the liquid crystal, whereinthe liquid crystal display panel further includes video lines each of which supplies a video voltage to the pixel electrode of each one of the plurality of sub pixels, anda portion of the pixel electrode in the reflective portion is overlapped to the video line when the pixel electrode in the reflective portion and the video line are projected from the direction orthogonal to a main surface of the liquid crystal display panel on one substrate.
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Accused Products
Abstract
In an IPS-type transflective liquid crystal display device in which reflective portions of sub pixels possess a normally white characteristic, contrast of the reflective portions can be enhanced. The present invention provides a transflective liquid crystal display device including a liquid crystal display panel which includes a pair of substrates; liquid crystal which is sandwiched between the pair of substrates; a plurality of sub pixels each of which includes a transmissive portion and a reflective portion; each sub pixel having a pixel electrode formed on one substrate out of the pair of substrates and a counter electrode formed on one substrate, the pixel electrode being arranged in common in the transmissive portion and the reflective portion and the counter electrode being arranged individually in the transmissive portion and the reflective portion in one sub pixel, the pixel electrode and the counter electrode generating an electric field therebetween thus driving the liquid crystal, wherein the liquid crystal display panel further includes video lines, and a portion of the pixel electrode in the reflective portion is overlapped to the video line when the pixel electrode in the reflective portion and the video line are projected from the direction orthogonal to a main surface of the liquid crystal display panel on one substrate.
29 Citations
15 Claims
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1. A transflective liquid crystal display device including a liquid crystal display panel, the liquid crystal display panel comprising:
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a pair of substrates; liquid crystal which is sandwiched between the pair of substrates; a plurality of sub pixels each of which includes a transmissive portion and a reflective portion;
each sub pixel having a pixel electrode formed on one substrate out of the pair of substrates and a counter electrode formed on one substrate, the pixel electrode being arranged in common in the transmissive portion and the reflective portion and the counter electrode being arranged individually in the transmissive portion and the reflective portion in one sub pixel, the pixel electrode and the counter electrode generating an electric field therebetween thus driving the liquid crystal, whereinthe liquid crystal display panel further includes video lines each of which supplies a video voltage to the pixel electrode of each one of the plurality of sub pixels, and a portion of the pixel electrode in the reflective portion is overlapped to the video line when the pixel electrode in the reflective portion and the video line are projected from the direction orthogonal to a main surface of the liquid crystal display panel on one substrate. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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2. A transflective liquid crystal display device including a liquid crystal display panel, the liquid crystal display panel comprising:
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a pair of substrates; liquid crystal which is sandwiched between the pair of substrates; a plurality of sub pixels each of which includes a transmissive portion and a reflective portion;
each sub pixel having a pixel electrode formed on one substrate out of the pair of substrates and a counter electrode formed on one substrate, the pixel electrode being arranged in common in the transmissive portion and the reflective portion and the counter electrode being arranged individually in the transmissive portion and the reflective portion in one sub pixel, the pixel electrode and the counter electrode generating an electric field therebetween thus driving the liquid crystal, whereinthe liquid crystal display panel includes color filters, and a length of the color filter in the first direction in the reflective portion of at least one sub pixel out of the plurality of sub pixels is set different from a length of the color filter in the first direction in the transmissive portion of one sub pixel. - View Dependent Claims (9)
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3. A transflective liquid crystal display device including a liquid crystal display panel, the liquid crystal display panel comprising:
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a pair of substrates; liquid crystal which is sandwiched between the pair of substrates; a plurality of sub pixels each of which includes a transmissive portion and a reflective portion;
each sub pixel having a pixel electrode formed on one substrate out of the pair of substrates and a counter electrode formed on one substrate, the pixel electrode being arranged in common in the transmissive portion and the reflective portion and the counter electrode being arranged individually in the transmissive portion and the reflective portion in one sub pixel, the pixel electrode and the counter electrode generating an electric field therebetween thus driving the liquid crystal, whereinthe liquid crystal display panel includes color filters, and a shape of the color filter in the reflective portion of at least one sub pixel out of the plurality of sub pixels is displaced in the first direction with respect to a shape of the color filter in the transmissive portion.
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4. A transflective liquid crystal display device including a liquid crystal display panel, the liquid crystal display panel comprising:
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a pair of substrates; liquid crystal which is sandwiched between the pair of substrates; a plurality of sub pixels each of which includes a transmissive portion and a reflective portion;
each sub pixel having a pixel electrode formed on one substrate out of the pair of substrates and a counter electrode formed on one substrate, the pixel electrode being arranged in common in the transmissive portion and the reflective portion and the counter electrode being arranged individually in the transmissive portion and the reflective portion in one sub pixel, the pixel electrode and the counter electrode generating an electric field therebetween thus driving the liquid crystal, whereinthe numbers of pixel electrodes in the reflective portions of the sub pixels of first color, second color and third color out of the plurality of sub pixels differ from each other for the respective sub pixels of the first color, the second color and the third color. - View Dependent Claims (5)
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6. A transflective liquid crystal display device including a liquid crystal display panel, the liquid crystal display panel comprising:
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a pair of substrates; liquid crystal which is sandwiched between the pair of substrates; a plurality of sub pixels each of which includes a transmissive portion and a reflective portion;
each sub pixel having a pixel electrode formed on one substrate out of the pair of substrates and a counter electrode formed on one substrate, the pixel electrode being arranged in common in the transmissive portion and the reflective portion and the counter electrode being arranged individually in the transmissive portion and the reflective portion in one sub pixel, the pixel electrode and the counter electrode generating an electric field therebetween thus driving the liquid crystal, whereinthe liquid crystal display panel includes video lines, and a distance between the pixel electrode in the reflective portion of at least one sub pixel out of the plurality of sub pixels and the video line is set smaller than a distance between the pixel electrode in the transmissive portion of one sub pixel and the video line.
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7. A transflective liquid crystal display device including a liquid crystal display panel, the liquid crystal display panel comprising:
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a pair of substrates; liquid crystal which is sandwiched between the pair of substrates; a plurality of sub pixels each of which includes a transmissive portion and a reflective portion;
each sub pixel having a pixel electrode formed on one substrate out of the pair of substrates and a counter electrode formed on one substrate, the pixel electrode being arranged in common in the transmissive portion and the reflective portion and the counter electrode being arranged individually in the transmissive portion and the reflective portion in one sub pixel, the pixel electrode and the counter electrode generating an electric field therebetween thus driving the liquid crystal, whereinthe lengths in the first direction of the sub pixels of first color, second color and third color out of the plurality of sub pixels in the reflective portions differ from each other for the respective sub pixels of the first color, the second color and the third color. - View Dependent Claims (8)
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Specification