Liquid crystal driver and liquid crystal display device using the same
First Claim
Patent Images
1. A liquid crystal driver comprising:
- a plurality of output terminals for outputting display voltages to be applied to a liquid crystal display device;
an input terminal for receiving display data corresponding to said plurality of output terminals; and
output means for converting said input display data into said output display voltages;
wherein said output means selects a display voltage level corresponding to one input display data and simultaneously generates two different display voltages from the selected display voltage level so that either one of said two different display voltages can be selected as an output display voltage for each of said output terminals.
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Abstract
A liquid crystal driver includes a voltage generator for generating gray scale voltages on the basis of reference voltages, and an output device for selecting one gray scale voltage from the generated gray scale voltages in accordance with display data, for applying inversion/non-inversion control to the selected gray scale voltage with respect to an inversion reference voltage on the basis of the selected gray scale voltage, an AC switching signal and the inversion reference voltage, and for outputting different liquid crystal supply voltages for one and the same display data to a liquid crystal panel.
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Citations
28 Claims
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1. A liquid crystal driver comprising:
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a plurality of output terminals for outputting display voltages to be applied to a liquid crystal display device;
an input terminal for receiving display data corresponding to said plurality of output terminals; and
output means for converting said input display data into said output display voltages;
wherein said output means selects a display voltage level corresponding to one input display data and simultaneously generates two different display voltages from the selected display voltage level so that either one of said two different display voltages can be selected as an output display voltage for each of said output terminals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of applying display voltages to a liquid crystal display device, the method comprising the steps of:
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receiving display data corresponding to output terminals which output display voltages;
generating gray scale display voltage levels on the basis of reference voltages;
selecting one of the gray scale display voltage levels for each output terminal in accordance with said display data, the selected gray scale display voltage level being a first display voltage for the output terminal;
supplying an AC switching signal and an inversion reference voltage, said AC switching signal having a polarity which is periodically inverted;
inverting said selected gray scale voltage level with respect to said inversion reference voltage to generate an inverted selected gray scale display voltage level, the inverted selected gray scale display voltage level being a second display voltage for the output terminal, the second display voltage being different from the first display voltage, the first display voltage and the second display voltage being available simultaneously;
selecting one of the first display voltage and the second display voltage in accordance with the AC switching signal as an output display voltage for the output terminal; and
outputting the output display voltage from the output terminal.
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17. A display device comprising:
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a display panel having a plurality of columns and a plurality of rows for displaying an image in accordance with display data; and
a data driver coupled to said display panel, said data driver being arranged on a single side of said display panel, said data driver having an input terminal and a plurality of output terminals, each of said output terminals corresponding to each of at least a part of said columns of said display panel, said data driver including;
a generator for simultaneously generating a plurality of display voltages, said display voltages including a set of positive and negative polarity gray scale voltages corresponding to each of gray scales, a selector for selecting one of said plurality of display voltages according to each of said display data, and an output circuit for outputting said selected one of said display voltages to said each of said output terminals;
wherein selected display voltages which correspond to adjacent two of said output terminals have different polarity from each other. - View Dependent Claims (18, 19, 20)
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21. A data driver for coupling to a display panel, said display panel having a plurality of columns and a plurality of rows for displaying an image in accordance with display data, said data driver being arranged on a single side of said display panel, said data driver having an input terminal and a plurality of output terminals, each of said output terminals corresponding to each of at least a part of said columns of said display panel, said data driver comprising:
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a generator for simultaneously generating a plurality of display voltages, said display voltages including a set of positive and negative polarity gray scale voltages corresponding to each of gray scales;
a selector for selecting one of said plurality of display voltages according to each of said display data; and
an output circuit for outputting said selected one of said display voltages to said each of said output terminals;
wherein selected display voltages which correspond to adjacent two of said output terminals have different polarity from each other. - View Dependent Claims (22, 23, 24)
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25. A method of applying display voltages to a display panel, said display panel having a plurality of columns and a plurality of rows for displaying an image in accordance with display data, said method comprising the steps of:
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providing an input terminal and a plurality of output terminals, said output terminals being coupled to said display panel, said output terminals being arranged on a single side of said display panel, each of said output terminals corresponding to each of at least a part of said columns of said display panel;
simultaneously generating a plurality of display voltages, said display voltages including a set of positive and negative polarity gray scale voltages corresponding to each of gray scales;
selecting one of said plurality of display voltages according to each of said display data; and
outputting said selected one of said display voltages to said each of said output terminals, thereby applying said selected one of said display voltages to said display panel;
wherein selected display voltages which correspond to adjacent two of said output terminals have different polarity from each other. - View Dependent Claims (26, 27, 28)
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Specification