Liquid crystal pixel circuit, driving method thereof, display panel and display device

Abstract

The invention discloses a liquid crystal pixel circuit, a driving method thereof, a display panel and a display device. Two control modules are used to separately charge the liquid crystal equivalent capacitance, the storage capacitance and the compensation capacitance, so that the liquid crystal equivalent capacitance, the storage capacitance and the compensation capacitance can be guaranteed. Compensate the charging rate of the capacitor, and will not cause insufficient charging of the liquid crystal equivalent capacitor, storage capacitor, and compensation capacitor due to limitations such as charging time. On the other hand, by increasing the compensation capacitor set in parallel with the storage capacitor, the capacitor after parallel connection The value is greater than the capacitance value of the storage capacitor, which is equivalent to increasing the capacitance value of the storage capacitor at both ends of the liquid crystal equivalent capacitance, which can better latch the voltage at both ends of the liquid crystal equivalent capacitance, even if the first control module is caused by pixel design and other reasons. When leakage occurs, it will not affect the voltage at both ends of the liquid crystal equivalent capacitance, so as to ensure that the liquid crystal equivalent capacitance remains stable for a long time, so as not to cause problems such as vertical crosstalk and afterimages.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a liquid crystal pixel circuit, a driving method thereof, a display panel and a display device. Background technique [0002] Thin Film Transistor Liquid Crystal Display (TFT-LCD) has many advantages such as thin body, power saving, and no radiation, and has been widely used. In the existing liquid crystal display, the pixels on both sides of the liquid crystal layer The electrode and the common electrode constitute the equivalent capacitance of the liquid crystal, figure 1 It is a structural schematic diagram of an existing liquid crystal pixel circuit, which includes a switching transistor T, a liquid crystal equivalent capacitor Clc composed of a pixel electrode 1 and a common electrode 2, and a storage capacitor Cst, the gate of the switching transistor T and the gate line Gate The source of the switching transistor T is connected to the data line Data, the drain of the swi...

AI Technical Summary

Problems solved by technology

[0003] In view of this, an embodiment of the present invention provides a liquid crystal pixel circuit, its driving method, a display panel, and a display device to solve the problems of vertical crosstalk and afterimages in the display screen due to the leakage current of the pixel switching transistor in the off state.

Images