Liquid crystal display device

Abstract

The invention relates to a liquid crystal display device. The device comprises a source driver for providing a plurality of data signals, a grid driver for modulating a voltage according to a high level grid signal to provide a plurality of grid signals, a pixel array unit for displaying images according to the plurality of data signals and the plurality of grid signals, and a grid pulse modulating unit. The grid pulse modulating unit comprises a waveform chamfering circuit, a diode and a transistor. The waveform chamfering circuit is used for providing a high level grid signal modulating voltage according to a chamfering control signal and a reference voltage of the high level grid signal so as to execute a waveform chamfering operation on the plurality of grid signals. The waveform chamfering operation has a voltage clamping function according to the unidirectional transmission property of the diode, and the transistor enables / removes the voltage clamping function according to the chamfering control signal.

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 boot 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 diagram...

AI Technical Summary

Problems solved by technology

However, within a predetermined period of time after the liquid crystal display device 10 is powered on, during the operation of the gate pulse modulating unit 120 with the waveform shaving function, the clamping voltage used to provide the waveform shaving function can be quickly increased to Micro Motion bit and fed into the gate driver 106, but at this time the low-level gate signal reference voltage VGL has not yet established an operating level, so the gate driver 106 cannot perform normal logic operations, thus generating complex noise-like gates Signal

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, the complex noise-like gates generated by the gate driver 106 within a predetermined period after power-on. All the signals will be fed into the pixel array unit 100, which will cause noise phenomenon in the boot screen

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