Thin film transistor gate voltage supply circuit

Abstract

The invention provides a thin film transistor gate voltage supply circuit. The thin film transistor gate voltage supply circuit is used for providing gate voltage supply for a thin film transistor. The thin film transistor gate voltage supply circuit includes a voltage generating circuit and a temperature compensation circuit, wherein the voltage generating circuit is used for generating original voltage, the temperature compensation circuit is electrically connected with the voltage generating circuit and is used for detecting ambient temperature, and the temperature compensation circuit performs compensation on the original voltage according to the difference value of the ambient temperature and preset temperature so as to obtain first voltage when the ambient temperature is smaller than the preset temperature, and provides the first voltage for the gate of the thin film transistor so as to drive the thin film transistor to work normally. The thin film transistor gate voltage supply circuit can drive the thin film transistor to work normally under low-temperature environment.

Description

technical field [0001] The invention relates to the display field, in particular to a thin film transistor gate voltage supply circuit. Background technique [0002] With the development of display technology, liquid crystal display devices (Liquid Crystal Display, LCD) have been favored by a large number of users due to advantages such as small size and low power consumption. Array substrate row drive technology (GateDriveronArray, GOA) is a technology that directly manufactures gate drive circuits or gate drive chips (GatedriverIC) on thin film transistor array substrates (ThinFilmTransistorArray, TFTArray) instead of external CMOS driver chips. . In the GOA technology, the driver chip can be directly made around the display panel, with fewer manufacturing procedures and lower product costs, and the TFT-LCD display panel has a higher integration level, and makes the display panel thinner. The gate voltage supply circuit of the thin film transistor in the prior art usuall...

AI Technical Summary

Problems solved by technology

However, the threshold voltage V between the gate and source of the thin film transistor TH As the temperature drift is relatively large, when the ambient temperature is lower than the preset temperature (for example, -10°C), the V of the thin film transistor TH big change

Under low temperature conditions, when the existing thin film transistor gate voltage supply circuit supplies a fixed voltage V to the gate of the thin film transistor GH , will cause V GH less than V TH , which in turn causes the thin film transistors to fail to work normally, and finally causes the display panel to fail to display normally

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