LIQUID CRYSTAL PANEL DRIVING DEVICE
2 Assignments
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Accused Products
Abstract
A switching-controlling section turns ON one of a transfer gate for high voltages or a transfer gate for low voltages and subsequently turns ON the other one of the transfer gates according to the outputs from the data latches only when the outputs from data latches are different from each other. Source lines are sequentially connected to a capacitor element for high voltages or a capacitor element for low voltages. For those source lines in which applied voltages change in a previous period and a subsequent period, an electric charge is stored and supplied effectively and power consumption is reduced, whereas for those source lines in which the applied voltages do not change, retained voltages do not vary so power is not consumed when subsequent voltages are applied. Power consumption in a liquid crystal panel driving device is reduced, and the time required for storing and supplying an electric charge is shortened. The circuit scale is also reduced.
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Citations
18 Claims
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1-16. -16. (canceled)
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17. A method for driving a liquid crystal display device having a first source line and a second source line, the method comprising:
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outputting a first voltage corresponding to first image data to the first source line; determining whether to connect the first source line to the second source line based on the first voltage and a second voltage corresponding to the second image data, said second voltage being output to the first source line after outputting the first voltage; and short circuiting the first source line to the second source line when the first source line is determined to be connected to the second source line at the second step. - View Dependent Claims (18)
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Specification