Liquid crystal display device and method of driving the same
First Claim
1. A liquid crystal display device comprising:
- an array substrate having a plurality of signal lines, a plurality of scanning lines crossing to the signal lines, switching elements disposed at each crossing points of the signal and scanning lines, the switching element connected with one of the signal lines and one of the scanning lines, pixel electrodes each connected with one of the switching elements;
a counter substrate having a counter electrode opposed to the pixel electrodes;
a liquid crystal layer including liquid crystal molecules disposed between the array and counter substrates;
a first and second alignment layers, said first alignment layer disposed between the array substrate and the liquid crystal layer, said second alignment layer disposed between the counter substrate and the liquid crystal layer, and each alignment layers treated so as to apply a predetermined pre-tilt angle to the liquid crystal molecules;
a signal line driver circuit applying signal voltages to each signal lines;
a scanning line driver circuit applying scanning voltages to each scanning lines;
a counter electrode driver circuit applying a counter electrode voltage to the counter electrode;
a shield electrode disposed in a region applied a lateral electric field which is against a direction of the pre-tilt angle; and
control means for adjusting a potential difference between the shield electrode and the counter electrode to a first potential difference during a first period, and adjusting the potential difference between the shield electrode and the counter electrode to a second potential difference, which is smaller than the first potential difference, during a second period continuing after the first period.
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Accused Products
Abstract
A liquid crystal display device includes an array substrate having a plurality of pixel electrodes in a matrix form, a counter substrate having a counter electrode opposed to the pixel electrodes, a liquid crystal layer including liquid crystal molecules disposed between the array and counter substrate, a first and second alignment layers, the first alignment layer disposed between the array substrate and the liquid crystal layer, the second alignment layer disposed between the counter substrate and the liquid crystal layer, and each of which are treated so as to give a predetermined pre-tilt angle to the liquid crystal molecules, and a shield electrode disposed a region applied a lateral electric field which is against to a direction of the pre-tilt angle. A potential difference between the shield electrode and the counter electrode is adjusted to a first potential difference during a first period, and the potential difference between the shield electrode and the counter electrode is adjusted to a second potential difference, which is smaller than the first potential difference, during a second period continuing after the first period so as to apply an alternating current voltage between the counter electrode and the shield electrode.
30 Citations
16 Claims
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1. A liquid crystal display device comprising:
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an array substrate having a plurality of signal lines, a plurality of scanning lines crossing to the signal lines, switching elements disposed at each crossing points of the signal and scanning lines, the switching element connected with one of the signal lines and one of the scanning lines, pixel electrodes each connected with one of the switching elements; a counter substrate having a counter electrode opposed to the pixel electrodes; a liquid crystal layer including liquid crystal molecules disposed between the array and counter substrates; a first and second alignment layers, said first alignment layer disposed between the array substrate and the liquid crystal layer, said second alignment layer disposed between the counter substrate and the liquid crystal layer, and each alignment layers treated so as to apply a predetermined pre-tilt angle to the liquid crystal molecules; a signal line driver circuit applying signal voltages to each signal lines; a scanning line driver circuit applying scanning voltages to each scanning lines; a counter electrode driver circuit applying a counter electrode voltage to the counter electrode; a shield electrode disposed in a region applied a lateral electric field which is against a direction of the pre-tilt angle; and control means for adjusting a potential difference between the shield electrode and the counter electrode to a first potential difference during a first period, and adjusting the potential difference between the shield electrode and the counter electrode to a second potential difference, which is smaller than the first potential difference, during a second period continuing after the first period. - View Dependent Claims (2, 3, 4, 5)
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6. A method of driving a liquid crystal display device including an array substrate having a plurality of pixel electrodes in a matrix form, a counter substrate having a counter electrode opposed to the pixel electrodes, a liquid crystal layer including liquid crystal molecules disposed between the array and counter substrates, a first and second alignment layers, said first alignment layer disposed between the array substrate and the liquid crystal layer, said second alignment layer disposed between the counter substrate and the liquid crystal layer, and aligment layers treated so as to apply a predetermined pre-tilt angle to the liquid crystal molecules, and a shield electrode disposed in a region applied a lateral electric field which is against a direction of the pre-tilt angle, comprising the steps of:
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applying a signal voltageat least one of the pixel electrodes in each perditermined periods and applying a counter electrode voltage to the counter electrode; holding potential difference between the one of the pixel electrodes and the counter electrode during each predetermined holding periods; and displaying an image corresponding to the potential difference; wherein a potential difference between the shield electrode and the counter electrode is adjusted to a first potential difference during a first period, and the potential difference between the shield electrode and the counter electrode is adjusted to a second potential difference, which is smaller than the first potential difference, during a second period continuing after the first period. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification