Patent ID: 9728151
Date: 2017-08-08
CPC Classifications: G09G

Claim:
1. A display panel driving and scanning system, which is used in a liquid crystal display (LCD) panel to drive pixels of the LCD panel for displaying an image, the LCD panel having a plurality of scan lines arranged in rows, a plurality of source lines arranged in columns across the scan lines, and a plurality of pixels each arranged at an intersection of the scan lines and the source lines, the display panel and scanning system comprising: a scan driver, connected to the LCD panel through the scan lines, for providing a scan driving signal to the LCD panel; a source driver, connected to the LCD panel through the source lines, for providing an image display signal to the LCD panel; an image processing device, connected to the source driver, for storing a previous frame and receiving a current frame, so as to calculate an overdriving signal for the current frame based on the previous frame and the current frame, and a timing controller, for controlling the scan driver, the source driver, and the image processing device to display the current frame on the LCD panel, wherein the image processing device outputs the overdriving signal and the current frame respectively for charging the plurality of pixels in one frame period, and the frame period is divided into a first time period, a second time period, and a third time period, such that the image processing device outputs the overdriving signal in the first time period for charging the plurality of pixels, stops outputting the overdriving signal and outputs the current frame in the second time period for charging the plurality of pixels based on the current frame, and stops outputting the current frame in the third time period; wherein the image processing device comprises: a first storage device for temporarily storing the current frame; a second storage device, connected to the first storage device, for receiving the current frame in a previous frame period and temporarily storing it as the previous frame; an overdriving signal calculator, connected to the first storage device and the second storage device, for calculating the overdriving signal for the current frame based on the current frame stored in the first device and the previous frame stored in the second storage device; and a multiplexer, connected to the first storage device, the second storage device, and the timing controller, for outputting the overdriving signal and the current frame according to an input signal from the timing controller.