Regulating circuit and display device

Abstract

The embodiment of the invention provides a regulating circuit and a display device, which belongs to the field of display techniques and can limit the fluctuation of Vcom within a very small range, weaken flicker phenomenon and improve the display quality of a liquid display. The Vcom voltage regulating circuit comprises a voltage supply module, a temperature sensing module and a regulation output module, wherein the voltage supply module is connected with the temperature sensing module and the regulation output module, which respectively supply input voltage to the temperature sensing module and the regulation output module; the temperature sensing module is connected with the regulation output module and used for converting sensed temperature change into an electric signal to the regulation output module; and the regulation output module is used for regulating output voltage Vcom according to the electric signal sent by the temperature sensing module, the output voltage Vcom fluctuates between upper limit voltage and lower limit voltage, and the upper limit and the lower limit are preset.

Description

Technical field [0001] The present invention relates to the field of display technology, in particular to an adjusting circuit and a display device. Background technique [0002] In order to achieve a narrow frame design, the existing liquid crystal display often uses a GOA (Gate Drive on Array, gate drive) circuit provided on the substrate to replace the original gate drive chip to drive the gate scan line. Since the GOA circuit includes a large number of MOS tubes in the form of TFTs formed on the substrate, its functional characteristics are easily changed with temperature changes, which leads to the voltage V of the driving gate scan line. gate Unstable, V gate Instability can easily lead to V com Jump, resulting in a serious flicker (flicker) phenomenon. Generally, if the measured flicker percentage is higher than 10%, the flicker can be detected by human eyes, which will affect the display quality of the display device. [0003] In the existing technology, V gate Do temperat...

AI Technical Summary

Problems solved by technology

Since the GOA circuit includes a large number of MOS tubes in the form of TFTs formed on the substrate, its functional characteristics are easy to change with changes in temperature, which leads to the voltage V of the driving gate scan line gate unstable, V gate instability can easily lead to V com Jumping, which leads to serious flicker (flicker) phenomenon. Generally, if the measured flicker percentage is higher than 10%, human eyes can detect flicker, which will affect the display quality of the display device.

[0003] In the prior art, V gate do temperature compensation, which can significantly improve V gate varies with temperature, but these changes have an effect on V com The impact of the jump is small, and it still produces a large flicker (flicker) percentage, which reduces the display quality of the LCD

Images