Liquid-crystal display device
First Claim
1. A liquid-crystal display device comprising:
- a panel having a flat construction and formed of a pair of substrates bonded together with a predetermined spacing therebetween and a liquid crystal held in the spacing, one of the substrates having pixel electrodes arranged in a matrix and switching elements for driving the pixel electrodes formed thereon, and the other substrate having opposing electrodes facing the corresponding pixel electrodes formed thereon; and
a driving circuit for driving each switching element in order to write a signal to each pixel electrode, and for applying a voltage corresponding to the signal between the opposing electrode and the pixel electrode to control the transmittance of the liquid crystal, wherein the orientation of said liquid crystal is controlled by the pair of substrates in such a manner that the liquid crystal exhibits bistability such that bistable states having different transmittances are maintained when no voltage is applied and the bistable states can be switched when a voltage exceeding a predetermined threshold value is applied, and exhibits a response characteristic in which the transmittance changes continuously, in response to an applied voltage, in a range which does not exceed the threshold value, and wherein said driving circuit can selectively control the voltage applied to the liquid crystal between a voltage equal to or higher than a threshold value and a voltage lower than the threshold value, and a two-gradation display using the bistability and a multi-gradation display using the response characteristic are made.
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Accused Products
Abstract
In a liquid-crystal display device, one of substrates has pixel electrodes and TFTs for driving these pixel electrodes formed thereon, and the other substrate has opposing electrodes facing the corresponding pixel electrodes formed thereon. The orientation of a liquid crystal is controlled to exhibit bistability in which bistable states having different transmittances are maintained when no voltage is applied and the bistable state can be switched as a result of applying a voltage exceeding a threshold value, and to exhibit response characteristic such that the transmittance varies continuously in response to an applied voltage in a predetermined range which does not exceed the threshold value. The voltage applied to the liquid crystal can be selectively controlled between a voltage equal to or higher than a threshold value and a voltage lower than the threshold value, and a two-gradation display using the bistability and a multi-gradation display using the response characteristic are made.
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Citations
8 Claims
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1. A liquid-crystal display device comprising:
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a panel having a flat construction and formed of a pair of substrates bonded together with a predetermined spacing therebetween and a liquid crystal held in the spacing, one of the substrates having pixel electrodes arranged in a matrix and switching elements for driving the pixel electrodes formed thereon, and the other substrate having opposing electrodes facing the corresponding pixel electrodes formed thereon; and
a driving circuit for driving each switching element in order to write a signal to each pixel electrode, and for applying a voltage corresponding to the signal between the opposing electrode and the pixel electrode to control the transmittance of the liquid crystal, wherein the orientation of said liquid crystal is controlled by the pair of substrates in such a manner that the liquid crystal exhibits bistability such that bistable states having different transmittances are maintained when no voltage is applied and the bistable states can be switched when a voltage exceeding a predetermined threshold value is applied, and exhibits a response characteristic in which the transmittance changes continuously, in response to an applied voltage, in a range which does not exceed the threshold value, and wherein said driving circuit can selectively control the voltage applied to the liquid crystal between a voltage equal to or higher than a threshold value and a voltage lower than the threshold value, and a two-gradation display using the bistability and a multi-gradation display using the response characteristic are made. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification