Liquid crystal display device

Abstract

The invention discloses a liquid crystal display device comprising a source driver, a grid driver, a pixel array unit and a grid pulse modulation unit, wherein the source driver is used for providing a plurality of data signals, the grid driver is used for providing a plurality of grid signals according to the modulation voltage of a high-potential grid signal, and the pixel array unit is used for displaying images according to the data signals and the grid signals. In addition, the grid driver can execute shutdown ghost attenuation operation on the pixel array unit according to a reset signal. The grid pulse modulation unit is used for providing the modulation voltage of the high-potential grid signal and executing waveform chamfering operation on the grid signals according to the modulation voltage of the high-potential grid signal. The waveform chamfering operation has a voltage clamping function controlled by the reset signal, and the voltage clamping function is disabled within a preset time interval after the liquid crystal display device is started up.

Description

technical field [0001] The invention relates to a liquid crystal display device, in particular to a liquid crystal display device capable of avoiding the phenomenon of noise in the start-up screen. Background technique [0002] Liquid crystal display (Liquid Crystal Display; LCD) has the advantages of light and thin appearance, power saving and low radiation, so it has been widely used in computer screens, mobile phones, personal digital assistants (PDAs), flat-screen TVs, and other communication / Electronic products such as entertainment equipment. The working principle of the liquid crystal display device is to change the arrangement state of the liquid crystal molecules in the liquid crystal layer by changing the voltage difference between the two ends of the liquid crystal layer, thereby changing the light transmittance of the liquid crystal layer, and then cooperate with the light source provided by the backlight module to display images. figure 1 It is a schematic dia...

AI Technical Summary

Problems solved by technology

During the operation of the liquid crystal display device 10, the clamping voltage Vclamp can quickly rise to the input voltage level and be fed into the gate driver 106 through the diode 125 within a predetermined period of time after starting up, but at this time the low potential gate signal reference The voltage VGL has not yet established a working potential, so the gate driver 106 cannot perform normal logic operations, thus generating multiple noise-like gate signals

And because the reset signal XON at this time will enable the gate driver 106 to output all gate signals to the pixel array unit 100 at the same time, that is, multiple noise-like gates generated by the gate driver 106 within a predetermined period of time after power-on. All polar signals will be fed into the pixel array unit 100, which will cause noise phenomenon in the boot screen. In other words, the noise phenomenon is caused by the voltage clamp function being enabled during the predetermined period of power-on.

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