Liquid crystal display device and method for driving the same
AssigneeLG Display Co., Ltd.
InventorChae Wook Lim
Life of this patent
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Abstract
A liquid crystal display device and method for driving the same is described for reducing a compensating deviation of a common voltage. The liquid crystal display device includes a liquid crystal display panel; a data driver for driving data lines of the liquid crystal display panel; a gate driver for driving gate lines of the liquid crystal display panel; and a common voltage compensating unit for generating a plurality of compensating signals for compensating respective distortions of common voltages at a plurality of common regions of a common electrode of the liquid crystal display panel by using common voltages fed back from the common regions, and supplying compensating signals corresponding to each of the plurality of common regions.
Claims6
A liquid crystal display device comprising:
- a liquid crystal display panel including a common electrode containing left and right peripheral common regions and a central common region between the left and right peripheral common regions;
- a data driver for driving data lines of the liquid crystal display panel;
- a gate driver for driving gate lines of the liquid crystal display panel;
- and
- a common voltage compensating unit for generating compensating signals for compensating respective distortions of common voltages at the left and right peripheral common regions and compensating signals for compensating distortions of common voltages at the central common region by using common voltages fed back from the central and left and right peripheral common regions respectively, and supplying compensating signals corresponding to each of the plurality of common regions,
- wherein the common voltage compensating unit includes:
- a first common voltage compensating unit for compensating only the central common region based on a distortion component of a peripheral common voltage fed back from only the left and right peripheral common regions, and
- a second common voltage compensating unit for compensating only the left and right peripheral common regions based on a distortion component of a central common voltage fed back from only the central common region.
A method for driving a liquid crystal display device including a common electrode containing left and right peripheral common regions and a central common region between the left and right peripheral common regions comprising:
- feeding common voltages back to a common voltage compensator from the central and peripheral common regions respectively;
- generating compensating signals for compensating distortions of common voltages at the left and right peripheral common regions and compensating signals for compensating distortions of common voltages at the central common region by using the common voltages fed back from the central and peripheral common regions respectively to the common voltage compensator for compensating distorted components of the common voltages;
- and
- supplying each of the compensating signals to corresponding ones of the plurality of common regions,
- wherein generating a plurality of compensating signals includes:
- inverting and amplifying using a distortion component of the peripheral common voltage fed back from only the left and right peripheral common regions to a first common voltage compensating unit to generate a central compensating signal and applying the central compensating signal to only the central common region, and
- inverting and amplifying using a distortion component of the central common voltage fed back from only the central common region to a second common voltage compensating unit to generate a peripheral compensating signal and applying the peripheral compensating signal to only the left and right peripheral common regions.
Dependencies are inferred from the claim text.