Drive method, compensation processor and drive device of liquid crystal display device

A technology of a liquid crystal display device and a driving method, which is applied to lighting devices, static indicators, instruments, etc., can solve the problems of reducing the display effect of the display device, flicker, and the brightness change of the backlight, so as to overcome the problem of screen flicker and improve the display effect. , Improve the effect of dynamic contrast

Inactive Publication Date: 2009-09-30
BOE TECH GRP CO LTD +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0006] However, there is a defect in the driving method of the existing liquid crystal display device using the dynamic contrast technology: although the data signal can be compensated by analyzing the frequency spectrum of the data signal, the output data signal can be changed according to the set driving frequency, but due to the backlight The change of light brightness has a step-by-step characteristic, and it does not change smoothly. Therefore, after the compensation and adjustment of the pictures of adjacent frames, there will be a sharp change in the brightness of the backlight as a whole, which may lead to flickering. Therefore, The display effect of the liquid crystal display device is reduced

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  • Drive method, compensation processor and drive device of liquid crystal display device
  • Drive method, compensation processor and drive device of liquid crystal display device
  • Drive method, compensation processor and drive device of liquid crystal display device

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Embodiment Construction

[0041] Such as Figure 4 Shown is the flow chart of a specific embodiment of the driving method of the liquid crystal display device of the present invention. The driving method is especially suitable for driving the backlight source during the driving process of the liquid crystal display. The specific steps are:

[0042] Step A1, the compensation processor receives the three primary colors (R, G, B) data signals of the current frame from the system, at the same time, the clock controller receives the synchronization signal from the system, and the transformer receives the power supply voltage from the system;

[0043] Step A2, the compensation processor performs spectrum analysis on the data signal, obtains the average luminance value of the current frame picture, and records the average luminance value of the current frame;

[0044] Step A3, the compensation processor queries to obtain the average brightness value of the previous frame and the average brightness value of th...

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Abstract

The invention relates to a drive method, a compensation processor and a drive device of a liquid crystal display device. The drive method comprises the following steps: a data signal of a current frame is received, the average brightness value of the current frame is acquired, at least two backlight drive pulse signals which have graded duty cycles are generated and output to drive a backlight if the difference value between the brightness values of the current frame and the last frame is larger or equal to a preset threshold value. The compensation processor comprises a data analysis module, a data compensation module, a backlight linear filtering module and a pulse generation module. The drive device adopts the compensation processor. The invention realizes the gradient of the brightness of the backlight by adopting a technological measure for generating a plurality of backlight drive pulse signals, thereby solving the problem that the liquid crystal display device suffers from flicker as the brightness of the backlight changes suddenly and improving the display effect of the liquid crystal display device.

Description

technical field [0001] The present invention relates to a driving method for a liquid crystal display device, a compensation processor and a driving device, in particular to a driving method for performing compensation after analyzing video data input to a liquid crystal display device, and a compensation processor for realizing analysis and compensation, and A drive unit using the compensation processor. Background technique [0002] Liquid crystal display devices, especially thin film transistor liquid crystal display devices (Thin Film Transistor-Liquid Crystal Display, hereinafter referred to as TFT-LCD) have the characteristics of light weight, thin thickness, low power consumption, suitable for low voltage drive, etc., and are widely used in mobile phones, Various image display media devices such as monitors and TVs. [0003] The main structure of the existing common liquid crystal display device includes an array substrate and a color filter substrate arranged in pai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G3/34H05B37/02
CPCG09G2320/0247G09G2360/16G09G2320/0653G09G2320/064G09G3/3406G09G2320/0646
Inventor 郑喆奎
Owner BOE TECH GRP CO LTD
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