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

A technology of a liquid crystal display panel and a driving circuit, applied in the field of its driving circuit and display device, liquid crystal display panel, and its driving method, capable of solving problems affecting the display quality of the liquid crystal display panel, abnormal display screen, and increased TFT leakage current, etc. To achieve the effect of avoiding abnormal display screen

Inactive Publication Date: 2015-07-15
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the liquid crystal display panel is in a low-temperature environment, the mobility of carriers in the active layer of the thin film transistor (Thin Film Transistor, TFT) will decrease, and it is necessary to increase the gate signal turn-on voltage V gh To improve the driving capability of the TFT, however, the gate signal turn-on voltage V gh Increasing the capacitance C between the gate line and the source gs increased by Among them, ΔV P V gh is the gate signal turn-on voltage, V gl is the gate signal off voltage, C gs is the capacitance between the gate line and the source, C lc is the capacitance between the pixel electrode and the liquid crystal molecules, C s is the storage capacitance between the pixel electrode and the common electrode, it can be deduced that the gate signal turn-on voltage V gh and the capacitance C between the gate line and the source gs Increasing the voltage difference ΔV before and after the voltage of the pixel electrode jumps P becomes larger, and the common electrode voltage V com Left unchanged, can cause serious flickering issues with LCD panels
When the LCD panel is in a high temperature environment, the threshold voltage V of the TFT th will drift toward lower voltages, and a gate signal shutdown voltage V gl greater than the threshold voltage V th In this case, the leakage current of the TFT will increase, which will affect the display quality of the liquid crystal display panel.
[0004] Therefore, how to avoid the abnormality of the display screen of the liquid crystal display panel in different temperature environments is a technical problem that those skilled in the art need to solve urgently.

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

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Embodiment Construction

[0026] The specific implementation manners of the liquid crystal display panel, its driving method, its driving circuit and display device provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] A method for driving a liquid crystal display panel provided by an embodiment of the present invention, such as figure 1 shown, including the following steps:

[0028] S101. The temperature detector sends the detected temperature of the environment where the liquid crystal display panel is located to the clock controller;

[0029] Specifically, a thermistor can be used to detect the temperature, or other devices capable of real-time temperature detection can also be used, which is not limited here;

[0030] S102. The clock controller controls the power management circuit to output the gate signal turn-on voltage to the gate drive circuit according to the corresponding relationship between the received...

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Abstract

The invention discloses a liquid crystal display panel, a driving method and a driving circuit thereof and a display device. The driving method comprises the following steps: a temperature detector detects the temperature of an environment in which the liquid crystal display panel is located, and transmits the temperature to a clock controller; the clock controller controls a power supply management circuit to output a grid signal opening voltage and a grid signal closing voltage to a grid driving circuit and controls a public electrode driving circuit to output a public electrode voltage according to the received temperature and the pre-stored correspondence of the temperature and the grid signal opening voltage, the grid signal closing voltage and the public electrode voltage; thus, the grid signal opening voltage, the grid signal closing voltage and the public electrode voltage can be adjusted to optimum values in real time according to the temperature of the environment in which the liquid display panel is located, so as to avoid the problem of abnormal displayed pictures of the liquid display panel in different temperature environments.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a liquid crystal display panel, a driving method thereof, a driving circuit thereof and a display device. Background technique [0002] Due to the advantages of low power consumption, low driving voltage, easy driving, direct drive by large-scale integrated circuits, simple structure, low cost, and long life, liquid crystal display panels have become a new star in the display field and a bright spot in economic development. [0003] When the liquid crystal display panel is in a low-temperature environment, the mobility of carriers in the active layer of the thin film transistor (Thin Film Transistor, TFT) will decrease, and it is necessary to increase the gate signal turn-on voltage V gh To improve the driving capability of the TFT, however, the gate signal turn-on voltage V gh Increasing the capacitance C between the gate line and the source gs increased by Among them, ΔV ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
Inventor 宋嘉嘉
Owner BOE TECH GRP CO LTD
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