Method and apparatus for driving liquid crystal display
AssigneeLG.Philips LCD Co., Ltd.
InventorsJong Sang Baek, Sun Young Kwon
Life of this patent
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Abstract
A method and apparatus for driving a liquid crystal display for reducing the number of data lines is disclosed. In the apparatus, a timing controller receives red sub-pixel data, green sub-pixel data and blue sub-pixel data from the exterior thereof and then divides the received data into odd-numbered sub-pixel data and even-numbered sub-pixel data. A data driver receives the odd-numbered sub-pixel data and the even-numbered sub-pixel data from the timing controller during one horizontal period and then applies the received odd-numbered and even-numbered sub-pixel data to data lines during the one horizontal period.
Claims21
A driving apparatus for a liquid crystal display including a plurality of data lines with sub-pixels arranged at the left and right sides of the data lines connected to each data line, the apparatus comprising:
- a liquid crystal display panel having a first and a second liquid crystal cells provided at crossings of a plurality of gate lines and a plurality of data lines, a first switching part driving the first liquid crystal cell, and a second switching part driving the second liquid crystal cell, wherein the first liquid crystal cell and the first switching part are provided at one side of the data lines, wherein the second liquid crystal cell and the second switching part are provided at another side of the data line;
- a timing controller that receives red sub-pixel data, green sub-pixel data and blue sub-pixel data and then divides the received data into odd-numbered sub-pixel data and even-numbered sub-pixel data;
- a data driver that receives the odd-numbered sub-pixel data and the even-numbered sub-pixel data from the timing controller during one horizontal period and then applies the received odd-numbered and even-numbered sub-pixel data to the data lines during the one horizontal period;
- and
- a gate driver sequentially applying a first and second gate signals to the gate lines so that the second gate signal applied to a ith (wherein i is an integer) gate line overlaps with a part of the first gate signal applied to a (i+2)th gate line,
- wherein the first switching part drives the first liquid crystal cell in response to the second gate signal applied to the ith gate line and the first gate signal applied to the (i+2)th gate line,
- wherein the second switching part drives the second liquid crystal cell in response to the the second gate signal applied to the ith gate line.
A method of driving a liquid crystal display including first and a second liquid crystal cells provided at crossings of a plurality of gate lines and a plurality of data lines, a first switching part driving the first liquid crystal cell, and a second switching part driving the second liquid crystal cell, the method comprising the steps of:
- (A) making a two-frequency-division of a data enable signal supplied from the exterior thereof to generate a modified data enable signal;
- (B) dividing received a sub-pixel data into odd-numbered sub-pixel data and even-numbered sub-pixel data;
- (C) applying the odd-numbered sub-pixel data to the data lines during one period of the modified data enable signal;
- (D) applying the even-numbered sub-pixel data to the data lines during one period of the modified data enable signal;
- (E) sequentially applying a first and second gate signals to the gate lines so that the second gate signal applied to a ith (wherein i is an integer) gate line overlaps with a part of the first gate signal applied to a (i+2)th gate line;
- (F) charging the odd-numbered sub-pixel data to the first liquid crystal cell in response to the second gate signal applied to the ith gate line and the first gate signal applied to the (i+2)th gate line using the first switching part;
- and
- (G) charging the even-numbered sub-pixel data to the second liquid crystal cell in response to the the second gate signal applied to the ith gate line using the second switching part.
Dependencies are inferred from the claim text.