Liquid crystal display and driving method thereof
View Patent ↗According to an embodiment of the present invention, a method of driving a liquid crystal display by frame rate control (FRC) is provided, which includes: receiving an input data having a first gray from an external graphic source; converting the input data to have bit number larger than the input data; and performing FRC on the converted data.
1. A method of driving a liquid crystal display by frame rate control (FRC), the method comprising:
receiving a plurality of raw data each having n bits;
converting each of the raw data into converted data having n-d bits, where d is a predetermined number of lowermost bits; and
performing FRC on the converted data during 2 d frames,
wherein the raw data corresponding to 1st to 2 d -th lowest brightness levels of the plurality of raw data, display a same luminance.
2. The method of claim 1 , wherein n is 8 and d is 2.
3. The method of claim 1 , wherein the raw data corresponding to the 1st to 2 d -th lowest brightness levels of the plurality of raw data, display minimum luminance.
4. A method of driving a liquid crystal display by frame rate control (FRC), the method comprising:
receiving raw data having n bits;
extending the raw data into extended data having e bits, where e is bigger than n;
converting the extended data into converted data having e-d bits, where d is a predetermined number of lowermost bits;
performing FRC on the converted data during 2 d frames.
5. The method of claim 4 , wherein n is 8, e is 9 and d is 3.
6. The method of claim 4 , wherein FRC is performed by pixel blocks.
7. The method of claim 6 , wherein FRC is performed such that the pixel block is alternately subject to a normal frame and a conjugate frame for two adjacent frames.
8. The method of claim 7 , wherein the conjugate frame and the normal frame are top-bottom inverted with respect to a center line of the pixel block.
9. The method of claim 7 , wherein the normal frame and the conjugate frame are repeated every 2 d frames.
10. The method of claim 7 , wherein the normal frame and the conjugate frame are repeated every frame.
11. The method of claim 7 , wherein the pixel block has 4×2 size.
12. The method of claim 7 , wherein the FRC is performed in time and space.
13. The method of claim 7 , wherein the FRC is performed by colors.
14. The method of claim 13 , wherein the FRC for red and green colors is performed in one of the normal frame and the conjugate frame, and the FRC for blue color is performed in the other of the normal frame and the conjugate frame in a certain frame.