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US 2003/0210218 A1Published application
Liquid-crystal display apparatus capable of reducing line crawling
AssigneeAlps Electric Co., Ltd.
InventorsHiroyuki Hebiguchi, Akira Nakano, Yukimitsu Yamada
Life of this patent
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Abstract
In a liquid-crystal display apparatus, each color pixel has three dots enclosed by adjacent signal lines and adjacent scanning lines. Each dot is provided with a switching device and a dot electrode. Each color pixel is provided with three display electrodes electrically connected to three dot electrodes through contact holes passing through an insulation layer. The display electrodes are disposed so as to overlap with the three dot electrodes. Each of the display electrodes is electrically connected to only one of the three dot electrodes. Each of the dot electrodes is electrically connected to only one of the display electrodes.
Claims20
A liquid-crystal display apparatus comprising:
- a liquid crystal sandwiched between a pair of substrates;
- a plurality of signal lines and a plurality of scanning lines arranged in a matrix on one of the substrates;
- a plurality of pixels each pixel having a plurality of dots, a plurality of first electrodes and a plurality of second electrodes, wherein the number of dots in each pixel corresponds to a number of basic colors used in the display apparatus and wherein the number of first electrodes and the number of second electrodes in each pixel are both equal to the number of dots in such pixel and wherein each of the second electrodes within each pixel are arranged to overlie each of the first electrodes in their associated pixel;
- an insulation layer disposed between the first and second electrodes, the insulation layer having a plurality of holes provided therein to permit the second electrodes to be electrically coupled to associated first electrodes, wherein each second electrode is electrically connected with only a single one of the first electrodes and each first electrode is electrically connected with only a single one of the second electrodes;
- and
- a plurality of switching devices, each switching device being arranged to be electrically connected with an associated first electrode, an associated scanning line and an associated signal line.
3 more elements
A liquid-crystal display apparatus comprising:
- a liquid crystal sandwiched between a pair of substrates;
- a plurality of signal lines and a plurality of scanning lines arranged in a matrix on one of the substrates;
- a plurality of pixels each pixel having a plurality of dots, a plurality of first electrodes and a plurality of second electrodes, wherein the number of dots in each pixel corresponds to a number of basic colors used in the display apparatus and wherein the number of first electrodes and the number of second electrodes in each pixel is equal to the number of dots in such pixel and wherein each of the second electrodes within each pixel are arranged to overlie each of the first electrodes in their associated pixel;
- an insulation layer disposed between the first and second electrodes, the insulation layer having a plurality of holes provided therein to permit the second electrodes to be electrically coupled to associated first electrodes, wherein each second electrode is electrically connected with only a single one of the first electrodes and each first electrode is electrically connected with only a single one of the second electrodes;
- and
- a plurality of switching devices, each switching device being arranged to be electrically connected with an associated first electrode, an associated scanning line and an associated signal line and wherein the switching devices and second electrodes are not stacked over one another.
3 more elements
A liquid-crystal display apparatus comprising:
- a liquid crystal sandwiched between a pair of substrates;
- a plurality of signal lines and a plurality of scanning lines arranged in a matrix on one of the substrates;
- a plurality of pixels each pixel having a plurality of dots, a plurality of first electrodes and a plurality of second electrodes, wherein the number of dots in each pixel corresponds to a number of basic colors used in the display apparatus and wherein the number of first electrodes and the number of second electrodes in each pixel is equal to the number of dots in such pixel and wherein each of the second electrodes within each pixel are arranged to overlie each of the first electrodes in their associated pixel;
- an insulation layer disposed between the first and second electrodes, the insulation layer having a plurality of holes provided therein to permit the second electrodes to be electrically coupled to associated first electrodes, wherein each second electrode is electrically connected with only a single one of the first electrodes and each first electrode is electrically connected with only a single one of the second electrodes;
- and
- a plurality of switching devices, each switching device being arranged to be electrically connected with an associated first electrode, an associated scanning line and an associated signal line and wherein at least one of the switching devices and at least one of the second electrodes are stacked over one another and the number of switching devices which overlap with each second electrode is the same for all the second electrodes.
3 more elements
A liquid-crystal display apparatus comprising:
- a liquid crystal sandwiched between a pair of substrates;
- a plurality of signal lines and a plurality of scanning lines on one of the substrates, wherein the scanning lines are arranged in a plurality of scanning-line groups;
- a plurality of pixels each pixel having a plurality of dots, a plurality of first electrodes and a plurality of second electrodes, wherein the number of dots in each pixel corresponds to a number of basic colors used in the display apparatus and wherein the number of first electrodes and the number of second electrodes in each pixel is equal to the number of dots in such pixel and wherein each of the second electrodes within each pixel are arranged to overlie each of the first electrodes in their associated pixel;
- an insulation layer disposed between the first and second electrodes, the insulation layer having a plurality of holes provided therein to permit the second electrodes to be electrically coupled to associated first electrodes, wherein each second electrode is electrically connected with only a single one of the first electrodes and each first electrode is electrically connected with only a single one of the second electrodes;
- a plurality of thin-film transistors, each thin film transistor being associated with a dot and driven by an associated signal line and an associated scanning-line group;
- and
- a plurality of selection circuits, each selection circuit electrically connected with an associated thin-film transistor, an associated scanning line group, a plurality of inputs and one output,
- wherein the plurality of inputs of each of the selection circuits is connected with different scanning lines within its associated scanning-line group and the output is connected with a gate electrode of the thin-film transistor, and
- whereby the thin film transistors of adjacent dots within the same pixel are arranged to be scanned in different scanning periods.
6 more elements
A liquid-crystal display apparatus comprising:
- a liquid crystal sandwiched between a pair of substrates;
- a plurality of signal lines and a plurality of scanning lines on one of the substrates, wherein the scanning lines are arranged in a plurality of scanning-line groups;
- a plurality of pixels each pixel having a plurality of dots, a plurality of first electrodes and a plurality of second electrodes, wherein the number of dots in each pixel corresponds to a number of basic colors used in the display apparatus and wherein the number of first electrodes and the number of second electrodes in each pixel is equal to the number of dots in such pixel and wherein each of the second electrodes within each pixel are arranged to overlie each of the first electrodes in their associated pixel;
- an insulation layer disposed between the first and second electrodes, the insulation layer having a plurality of holes provided therein to permit the second electrodes to be electrically coupled to associated first electrodes, wherein each second electrode is electrically connected with only a single one of the first electrodes and each first electrode is electrically connected with only a single one of the second electrodes;
- and
- a plurality of thin-film-transistor sets, each thin-film-transistor set being associated with a dot and driven by an associated signal line and an associated scanning-line group,
- wherein each thin-film-transistor set consists of a plurality of thin-film transistors connected in series between the associated signal line and associated dot,
- wherein the number of thin-film transistors within each thin-film-transistor set is less than the number of scanning lines within the associated scanning-line group
- wherein each of the thin-film transistors has a gate electrode, each gate electrode electrically connected with different scanning lines within its associated scanning-line group,
- wherein the combination of connections between each gate electrode and each of the scanning lines within its associated scanning-line group is different for adjacent dots within a pixel, and
- whereby the thin film transistors of adjacent dots within the same pixel are arranged to be scanned in different scanning periods.
8 more elements
A liquid-crystal display apparatus comprising:
- a liquid crystal sandwiched between a pair of substrates;
- a plurality of signal lines and a plurality of scanning lines arranged in a matrix on one of the substrates;
- a plurality of pixels each pixel having a plurality of dots, a plurality of first electrodes and a plurality of second electrodes, wherein the number of dots in each pixel corresponds to a number of basic colors used in the display apparatus and wherein the number of first electrodes and the number of second electrodes in each pixel is equal to the number of dots in such pixel and wherein each of the second electrodes within each pixel are arranged to overlie each of the first electrodes in their associated pixel;
- an insulation layer disposed between the first and second electrodes, the insulation layer having a plurality of holes provided therein to permit the second electrodes to be electrically coupled to associated first electrodes, wherein each second electrode is electrically connected with only a single one of the first electrodes and each first electrode is electrically connected with only a single one of the second electrodes;
- and
- a plurality of thin-film transistors, each thin-film transistor being associated with a dot and driven by an associated signal line and an associated scanning line,
- wherein each scanning line has section that runs parallel to the signal lines.
4 more elements
A liquid-crystal display apparatus comprising:
- a liquid crystal sandwiched between a pair of substrates;
- a plurality of signal lines and a plurality of scanning lines arranged in a matrix on one of the substrates;
- a plurality of pixels each pixel having a plurality of dots, a plurality of first electrodes and a plurality of second electrodes, wherein the number of dots in each pixel corresponds to a number of basic colors used in the display apparatus and wherein the number of first electrodes and the number of second electrodes in each pixel is equal to the number of dots in such pixel and wherein each of the second electrodes within each pixel are arranged to overlie each of the first electrodes in their associated pixel;
- an insulation layer disposed between the first and second electrodes, the insulation layer having a plurality of holes provided therein to permit the second electrodes to be electrically coupled to associated first electrodes, wherein each second electrode is electrically connected with only a single one of the first electrodes and each first electrode is electrically connected with only a single one of the second electrodes;
- and
- a plurality of thin-film transistors, each thin-film transistor being associated with a dot and driven by an associated signal line and an associated scanning line,
- wherein each scanning line has section that runs parallel to the signal lines.
4 more elements
A liquid-crystal display apparatus according to claim 19, wherein a scanning-line group is formed of three or more scanning lines, and three scanning-line groups are electrically connected with each other.
Dependencies are inferred from the claim text.