Vertical orientation mode liquid crystal display device

Abstract

The present invention discloses a vertical orientation type liquid crystal display device, which includes a plurality of pixels defined by crossing a grid scanning beam and a data line, each pixel is divided into at least a first sub-pixel and a second sub-pixel; and a plurality of pixel circuits connected to the grid scanning beam and the data line. The pixel circuit includes at least a first membrane transistor, a second membrane transistor, a third membrane transistor, a first sub-pixel capacitor, a second sub-pixel capacitor, a storage capacitor, and an additional capacitor. The storage capacitor is connected with the first sub-pixel capacitor in parallel to keep the data signal voltage transmitted through the data line. The additional capacitor is connected with the second sub-pixel capacitor in series, is connected with the second membrane transistor in parallel. One terminal of the second sub-pixel capacitor is connected with the second electrode of the third membrane transistor electrically. The second membrane transistor and the third membrane transistor are controlled by the previous row of grid scanning beam.

Description

Technical field [0001] The invention relates to a liquid crystal display device, in particular to a thin film transistor liquid crystal display device in a vertical alignment mode. Background technique [0002] The liquid crystal in the liquid crystal display device itself does not emit light. The liquid crystal display controls the light transmittance of the liquid crystal cell by controlling the twist of the liquid crystal molecules by an electric field, so as to achieve the purpose of display. Generally, in TFT-LCD (Thin Film Transistor Liquid Crystal Display), liquid crystal is enclosed between the upper and lower substrates. In a vertical alignment mode TFT-LCD, liquid crystal molecules are generally composed of a liquid crystal material with a negative dielectric constant and anisotropy. With reference to US Patent 6661488B1, when no voltage is applied to the upper and lower substrates of the liquid crystal display device, the liquid crystal molecules 106 are arranged perpe...

AI Technical Summary

Problems solved by technology

These two implementation methods need to add additional gate scanning lines or data lines compared with ordinary MVA or PVA liquid crystal display devices, and require the cooperation of the system driving circuit, the circuit is complex, and the implementation cost is high.

Referring to Figure 7, similar to the circuit in Figure 6, by increasing the capacitance C that can achieve charge redistribution CSA with C CSB , although the differentiated voltages on the nodes Va and Vb can be realized, the influence of the voltage signal of the previous frame cannot be ruled out, and the correctness of the voltage data written in the current frame cannot be guaranteed by relying on the design of the pixel circuit itself

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