Display driving circuit, voltage conversion device, and display device and shutdown control method thereof

A technology for voltage conversion and display driving, applied in the field of voltage conversion devices and display driving circuits, can solve the problems of fast voltage drop of the voltage converter, incomplete recovery of pixels, after-image after shutdown, etc. The effect of prolonging time and improving performance

Active Publication Date: 2019-03-01
BOE TECH GRP CO LTD +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in some application scenarios, the voltage drop rate at the power connection terminal of the voltage converter may be too fast, so that the voltage obtained by the relevant components has dropped below the working voltage before the shutdown operation is completed.
For example, when shutting down, th

Method used

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  • Display driving circuit, voltage conversion device, and display device and shutdown control method thereof
  • Display driving circuit, voltage conversion device, and display device and shutdown control method thereof
  • Display driving circuit, voltage conversion device, and display device and shutdown control method thereof

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Embodiment Construction

[0040] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are some, not all, embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by those skilled in the art to which the present invention belongs. "First", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Comprising" or similar words mean that the elements...

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Abstract

The invention discloses a display driving circuit, a voltage conversion device, and a display device and a shutdown control method thereof, and belongs to the field of display. The display driving circuit includes a voltage converter and a source driver. The voltage converter has a first end to be connected to the positive voltage of a power source, and a second end for outputting a digital positive voltage to the source driver. The display driving circuit further includes a switch module and a voltage comparison module, wherein the switch module is disposed on a voltage transmission path between the second end of the voltage converter and the source driver; and the voltage comparison module is connected to the first end of the voltage converter and is configured to control the switch module to cut off the voltage transmission path when a voltage at the first end of the voltage converter is less than a reference voltage. The display driving circuit helps to eliminate the shutdown display anomaly caused by the excessively fast power-down speed and improve the performance of the display device.

Description

technical field [0001] The invention relates to the display field, in particular to a display driving circuit, a voltage conversion device, a display device and a shutdown control method thereof. Background technique [0002] In existing display devices, the voltage converter (DC-DC Converter) is mainly used to convert the power supply voltage into various voltages required by other components, such as timing controller (Timimg Controller, TCON), gate driver (Gate Driver ) and the digital positive voltage (AVDD) required by both the source driver (Source Driver), the turn-on voltage (Von) and turn-off voltage (Voff) required by the gate driver, and the common voltage (Vcom) required by the display panel, etc. Wait. During the normal shutdown process of the display device, the voltage converter that loses power supply will use the charge stored in the capacitor to supply power to other components for a short period of time, so that the relevant components can complete operat...

Claims

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Application Information

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IPC IPC(8): G09G3/36
CPCG09G3/32G09G3/3275G09G3/3696G09G2330/028G09G2330/027G09G3/2092G09G3/2096G09G2310/027H02M3/155G09G3/3258
Inventor 侯帅徐波伏思庆刘兴洪
Owner BOE TECH GRP CO LTD
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