Liquid crystal apparatus that changes a voltage level of a correction pulse based on a detected temperature
First Claim
1. A liquid crystal apparatus, comprising:
- a liquid crystal device comprising a pair of substrates having thereon a group of scanning electrodes and a group of data electrodes intersecting the scanning electrodes so as to form an electrode matrix, and a liquid crystal disposed between the substrates so as to form a pixel at each intersection of the scanning electrodes and the data electrodes,temperature-detection means for detecting a temperature of the liquid crystal device,drive means for applying a scanning signal comprising a clear pulse, a write pulse and a correction pulse to the scanning electrodes and for applying data signals to the data electrodes in synchronism with the scanning signal, andvoltage control means for changing a voltage level of the correction pulse based on temperature data from the temperature-detection means,wherein the voltage control means changes the voltage level of the correction pulse based on a table showing a relationship between the detected temperature and a temperature distribution of the liquid crystal device.
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Abstract
A liquid crystal apparatus includes a liquid crystal device formed by a pair of substrates having thereon a group of scanning electrodes and a group of data electrodes intersecting the scanning electrodes so as to form an electrode matrix, and a liquid crystal disposed between the substrates so as to form a pixel at each intersection of the scanning electrodes and the data electrodes; and temperature-detection means for detecting a temperature of the liquid crystal device. The liquid crystal device is driven by applying a scanning signal comprising a clear pulse, a write pulse and a correction pulse to the scanning electrodes and for applying data signals to the data electrodes in synchronism with the scanning signal, while changing a voltage level of the correction pulse based on temperature data from the temperature-detection means. As a result, the liquid crystal device can effect a stable display over the entire area even if it has a temperature distribution therealong.
24 Citations
13 Claims
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1. A liquid crystal apparatus, comprising:
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a liquid crystal device comprising a pair of substrates having thereon a group of scanning electrodes and a group of data electrodes intersecting the scanning electrodes so as to form an electrode matrix, and a liquid crystal disposed between the substrates so as to form a pixel at each intersection of the scanning electrodes and the data electrodes, temperature-detection means for detecting a temperature of the liquid crystal device, drive means for applying a scanning signal comprising a clear pulse, a write pulse and a correction pulse to the scanning electrodes and for applying data signals to the data electrodes in synchronism with the scanning signal, and voltage control means for changing a voltage level of the correction pulse based on temperature data from the temperature-detection means, wherein the voltage control means changes the voltage level of the correction pulse based on a table showing a relationship between the detected temperature and a temperature distribution of the liquid crystal device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A driving method for a liquid crystal device of the type comprising a pair of substrates having thereon a group of scanning electrodes and a group of data electrodes intersecting the scanning electrodes so as to form an electrode matrix, and a liquid crystal disposed between the substrates so as to form a pixel at each intersection of the scanning electrodes and the data electrodes;
- said driving method comprising;
detecting a temperature of the liquid crystal device by temperature detection means, sequentially applying a scanning signal comprising a clear pulse, a write pulse and a correction pulse to the scanning electrodes and applying data signals to the data electrodes in synchronism with the scanning signal, and changing a voltage level of the correction pulse based on temperature data from the temperature detection means, wherein the voltage level of the correction pulse is changed based on a table showing a relationship between the detected temperature and a temperature distribution of the liquid crystal device. - View Dependent Claims (13)
- said driving method comprising;
Specification