Liquid crystal display apparatus and method for driving the same
First Claim
1. A method for driving a liquid crystal display apparatus which includes liquid crystal having spontaneous polarization disposed between a plurality of pixel electrodes arranged in a matrix form and a common electrode disposed to face the pixel electrodes, the liquid crystal having a dark state when no voltage is applied to the liquid crystal and a bright state when a positive or a negative voltage is applied to the liquid crystal, comprising:
- a polarity inversion step of periodically inverting polarities of at least one part of voltages applied between the plurality of pixel electrodes and the common electrode; and
a write-in step of applying voltages to the pixel electrodes to hold display voltages corresponding to the applied voltages to the pixel electrodes, respectively;
wherein the polarity of inversion step includes a step of effecting the polarity inversion to satisfy an expression of TS/TF≧
2 when a frame period is set to TF and a period for effecting the polarity inversion is set to TS.
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Abstract
In a method for driving a liquid crystal display apparatus which includes liquid crystal having spontaneous polarization disposed between a plurality of pixel electrodes arranged in a matrix form and a common electrode disposed to face the pixel electrodes, the method for driving the liquid crystal display apparatus includes a polarity inversion of periodically inverting polarities of at least one part of voltages applied between the plurality of pixel electrodes and the common electrode, and a write-in operation of applying the voltages to the pixel electrodes to hold display voltages, respectively, corresponding to the applied voltages on the pixel electrode, wherein the polarity inversion is effected to satisfy the expression of TS/TF≧2 when a frame period is set to TF and a period for effecting the polarity inversion is set to TS.
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Citations
22 Claims
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1. A method for driving a liquid crystal display apparatus which includes liquid crystal having spontaneous polarization disposed between a plurality of pixel electrodes arranged in a matrix form and a common electrode disposed to face the pixel electrodes, the liquid crystal having a dark state when no voltage is applied to the liquid crystal and a bright state when a positive or a negative voltage is applied to the liquid crystal, comprising:
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a polarity inversion step of periodically inverting polarities of at least one part of voltages applied between the plurality of pixel electrodes and the common electrode; and
a write-in step of applying voltages to the pixel electrodes to hold display voltages corresponding to the applied voltages to the pixel electrodes, respectively;
wherein the polarity of inversion step includes a step of effecting the polarity inversion to satisfy an expression of TS/TF≧
2 when a frame period is set to TF and a period for effecting the polarity inversion is set to TS.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A liquid crystal display apparatus comprising:
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a first substrate;
a plurality of pixel electrodes arranged in a matrix form on the first substrate;
a second substrate disposed to face a surface of the first substrate on which the plurality of pixel electrodes are formed;
a common electrode formed on the second substrate to face the plurality of pixel electrodes; and
liquid crystal having spontaneous polarization and held between the first and the second substrate;
wherein the liquid crystal display apparatus has a dark state when no voltage is applied to the liquid crystal, a bright state when a positive or a negative voltage is applied to the liquid crystal, and an operation of periodical polarity inversion for at least one part of voltages applied between the plurality of pixel electrode and the common electrode, and a write-in operation for applying voltages to the pixel electrode to hold display voltages corresponding to the applied voltages to the pixel electrodes, respectively, and the polarity inversion operation is effected to satisfy an expression of TS/TF≧
2 when a frame period is set to TF and a period for effecting the polarity inversion is set to TS.- View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification