Abstract: The present application relates to a driving circuit for display panel, which drives a plurality of pixel structures of a display panel. Each of pixel structures comprises a light emitting element, which is coupled between a first voltage and a second voltage. The driving circuit comprises a power supply circuit, which is coupled to the pixel structures, provides the first voltage and the second voltage, and adjusts the first voltage or/and the second voltage for adjusting a voltage difference between the first voltage and the second voltage. That is, a current flowing through the light emitting elements of the pixel structures may be adjusted for reducing the flicker in the display panel.

Abstract: A driving method to improve response time of twisted nematic (TN) and super twisted nematic (STN) passive matrix LCDs without increasing graphic memory (GRAM) adopts an over-driving operation principle to convert data of three primary colors to YCbCr data and over-driving YCbCr data. Then compressing, sampling and combining are performed through a video compression standard to further reduce a portion of storage bits of the YCbCr data and over-driving YCbCr data. Through an output frequency doubling circuit an over-driving compensation potential higher or lower than the original output potential is flexibly given N times according to the over-driving Y?Cb?Cr? data within the update time period of each data bus. Thereby the response time of the LCDs improves without increasing the GRAM and dynamic picture blurring phenomenon also improves.

Abstract: The present invention discloses a driving method for reducing the response time of TN LCD and STN LCD, wherein a dynamic picture judgment mechanism is arranged behind the RGB data bus and used to compare the current picture with the previous picture; if the pictures are different, an over-driving compensation voltage is output N times within each refresh time of the data bus, and the over-driving compensation voltage is flexibly higher or lower than the original output voltage. Thereby, the liquid crystal can twist to attain the target brightness within a shorter time. Therefore, the present invention can solve the problem of the blurring phenomenon resulting from a too long response time of PM-LCD (such as TN LCD and STN LCD).