Patent ID: 8305367
Filing Date: 2012-11-06
Classification: G09G

Abstract:
1. A method for driving a display device having a direct-lit backlight module having a plurality of LEDs as light source arranged in a plurality of horizontal rows where said display has a panel positioned in front of said backlight module, said panel has a plurality of horizontal scan lines and a plurality of vertical data lines, the intersection of a said scan line and a said data line defines a pixel of said panel, said pixel is turned by enabling said scan line, supplying a driving voltage on said data line, and turning on a row of said LEDs behind said pixel, said pixel has a retardation property with which the grey level of said pixel gradually approaches the grey level corresponding to said driving voltage, said method comprising the steps of: within an initial portion of the period of a frame, applying an overdriving voltage to said pixel that is larger than the voltage corresponding to a target grey level of said pixel within said period and then, with the remaining portion of said period, applying a driving voltage to said pixel that is equal to the voltage corresponding to said target grey level of said pixel; and within said period, applying a control signal whose frequency is at least equal to the frame rate of said display device so that, said row of said LEDs is turned off at a beginning period of each frame.