Grey insertion method and drive circuit for LCD display

Abstract

The invention is applied in the technical field of LCD display, and provides a grey insertion method and a drive circuit for the LCD display, wherein the method comprises the following steps of: judging that the LCD display displays a dynamic frame or static frame; when the LCD display displays the dynamic frame, improving the extent of the grey insertion of the frame displayed by the LCD display, and synchronously prolonging a working cycle of a pulse width modulation signal, wherein the pulse width modulation signal is used for driving a backlight module of the LCD display; and when the LCDdisplay displays the static frame, reducing the extent of the grey insertion of the frame displayed by the LCD display, and synchronously shortening the working cycle of the pulse width modulation signal. Because a frame detector is used to judge that a second frame displayed by the LCD display is the dynamic frame or static frame, the increase or decrease of the extent of the grey insertion of the frame is determined, and the working cycle of the pulse width modulation signal is synchronously prolonged or shortened, the method and the drive circuit can be suitably used for adjusting the extent of the grey insertion of the frame, synchronously adjusting the brightness of the backlight, and improving the dynamic fuzzy problem of the dynamic frame.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal displays, and in particular relates to a gray insertion method and a driving circuit of a liquid crystal display. Background technique [0002] The Liquid Crystal Display (LCD) adopts a hold-type display mode, so when the LCD displays dynamic images, the image will be blurred. Generally speaking, the prior art adopts a gray insertion technique to reduce motion blur. The following briefly describes how to drive the LCD panel. [0003] The LCD panel driving signal is mainly divided into two parts, one is the data signal provided by the source driver (Source Driver), and the other is the scanning signal provided by the gate driver (Gate Driver). The data signal mainly provides a voltage signal corresponding to the gray scale of each pixel. The scan signal is used to control the switch signal input by the pixel voltage of each column, and the scan signal is scanned column by column. General...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the embodiments of the present invention is to provide a gray insertion method for a liquid crystal display, which aims to solve the problem that the brightness of the display screen varies greatly when the gray insertion function is turned on or off in the existing liquid crystal display, which causes discomfort to the human eyes.

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