Display apparatus and method of driving the same
First Claim
1. A method of driving a display apparatus having a plurality of pixels, each pixel including a liquid crystal cell connected between a pixel electrode and a first common voltage electrode and a storage capacitor connected between the pixel electrode and a second common voltage electrode, the method comprising:
- determining whether image data of a current frame is changed, as compared to image data of a previous frame;
when the image data of the current frame is changed, storing a voltage level corresponding to the image data of the current frame in the storage capacitor of each of the plurality of pixels;
when the image data of the current frame is not changed, changing a level of a second common voltage applied to the second common voltage electrode of each of the plurality of pixels; and
when a reference time elapses after the voltage level is changed to the level of the second common voltage applied to the second common voltage electrode of each of the plurality of pixels, changing the level of the second common voltage to a level before the second common voltage is changed.
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Abstract
A method of driving a display apparatus including a plurality of pixels that respectively store a voltage level corresponding to a data signal and respectively include a storage capacitor connected between a pixel electrode and a second common voltage electrode, the method including operations of determining whether image data of a current frame is changed, compared to image data of a previous frame, when the image data of the current frame is changed, storing a voltage level corresponding to the image data of the current frame in the storage capacitor of each of the plurality of pixels, and when the image data of the current frame is not changed, changing a level of a second common voltage applied to the second common voltage electrode of each of the plurality of pixels.
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Citations
16 Claims
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1. A method of driving a display apparatus having a plurality of pixels, each pixel including a liquid crystal cell connected between a pixel electrode and a first common voltage electrode and a storage capacitor connected between the pixel electrode and a second common voltage electrode, the method comprising:
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determining whether image data of a current frame is changed, as compared to image data of a previous frame; when the image data of the current frame is changed, storing a voltage level corresponding to the image data of the current frame in the storage capacitor of each of the plurality of pixels; when the image data of the current frame is not changed, changing a level of a second common voltage applied to the second common voltage electrode of each of the plurality of pixels; and when a reference time elapses after the voltage level is changed to the level of the second common voltage applied to the second common voltage electrode of each of the plurality of pixels, changing the level of the second common voltage to a level before the second common voltage is changed. - View Dependent Claims (2, 3, 4, 5, 6, 15)
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7. A display apparatus, comprising:
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a pixel unit including a plurality of pixels, each of the plurality of pixels including a liquid crystal cell connected between a pixel electrode and a first common voltage electrode and a storage capacitor connected between the pixel electrode and a second common voltage electrode; a common voltage driver to supply a second common voltage to the plurality of pixels; and a compensation controller to determine whether image data of a current frame is changed, as compared to image data of a previous frame, wherein, when the image data of the current frame is changed, the compensation controller is to control the common voltage driver to store a voltage level corresponding to the image data of the current frame in the storage capacitor of each of the plurality of pixels, wherein, when the image data of the current frame is not changed, the compensation controller is to control the common voltage driver to change a level of the second common voltage applied to the second common voltage electrode of each of the plurality of pixels, and wherein, when a reference time elapses after the voltage level is changed to the level of the second common voltage applied to the second common voltage electrode of each of the plurality of pixels, the compensation controller is to control the common voltage driver to change the level of the second common voltage to a level before the second common voltage is changed. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 16)
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Specification