Liquid crystal driver and liquid crystal display device using the same
First Claim
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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.
22 Citations
19 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 displaying an image in accordance with display data and having a plurality of gate lines and a plurality of data lines delimiting a plurality of pixels; a scanner driver connected to the plurality of gate lines; and a data driver arranged on a single side of the display panel, and having a circuit simultaneously outputting a plurality of display voltages, a plurality of selectors, and a plurality of output terminals connected to the plurality of data lines; wherein the plurality of display voltages include a set of positive polarity gray scale voltages and a set of negative polarity gray scale voltages, and each of the plurality of selectors outputs a selected voltage based on the plurality of display voltages according to each of the display data, and each of the plurality of the output terminals outputs the selected voltage to each of the plurality of data lines; and wherein voltages corresponding to an adjacent two of the data lines are of different polarity from each other, and a polarity of each pixel is inverted at intervals of one frame time. - View Dependent Claims (18, 19)
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Specification