Drive device and drive method for liquid crystal display

Abstract

The invention relates to a drive device and a drive method for a liquid crystal display. The drive device comprises a liquid crystal display, a grid drive, a data drive and a time sequence controller, wherein the time sequence controller is connected with the grid drive, the data drive and a backlight source, and is used for generating a gray scale level data signal and an internal logic synchronous signal according to an input signal, and generating a grid scanning control signal, a data input control signal and a backlight source control signal according to the internal logic synchronous signal and the time sequence of a data transmission channel to make the backlight source closed between the end moment of a last row of grid scanning control signal of the frame and the start moment of a first row of grid scanning control signal of next frame. The invention controls the on-off of the backlight source between two frames, makes the liquid crystal display screen generate periodic black frame, effectively improves the trailing phenomenon of moving images caused by persistence of vision, improves the frame quality, and simultaneously reduces the power consumption of the backlight source as the backlight source is closed between the two frames.

Description

technical field [0001] The invention relates to a display driving device and a driving method, in particular to a liquid crystal display driving device and a driving method. Background technique [0002] When displaying static images, the advantages of liquid crystal displays (Liquid Crystal Display, referred to as LCD) are obvious, such as no flicker, but when displaying dynamic images, there will be serious smearing, which makes liquid crystal displays in digital TVs. , video playback and game applications have been greatly limited. [0003] The prior art liquid crystal display includes a liquid crystal display screen, a driving circuit (including a timing controller, a grid driver, and a data driver), a backlight source and an inverter, and the backlight source is composed of several CCFL lamp tubes (or LED light sources), optical films and Composed of outer frame brackets, the light emitted by the lamp tube is transformed into a surface light source through a reflective...

AI Technical Summary

Problems solved by technology

When the data of the next frame is rewritten, the gray level of the pixels in this row will directly jump to the gray level of the next frame, which will easily cause the original picture to stay in the human eye, and the visual residue of the previous frame will affect the vision. The acceptance of the next frame of picture forms a visual smear, and the visual smear directly causes the picture to be blurred

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