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Control method, backlight control circuit, liquid crystal display (LCD) panel and LCD

A liquid crystal display panel, backlight control technology, applied in static indicators, instruments, etc., can solve problems such as circuit shutdown

Inactive Publication Date: 2013-03-13
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a control method, a backlight control circuit, a liquid crystal display panel and a liquid crystal display to solve the problem of circuit shutdown caused by over-temperature protection in the prior art

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  • Control method, backlight control circuit, liquid crystal display (LCD) panel and LCD
  • Control method, backlight control circuit, liquid crystal display (LCD) panel and LCD
  • Control method, backlight control circuit, liquid crystal display (LCD) panel and LCD

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Embodiment Construction

[0027] The control method for controlling the backlight control circuit of the liquid crystal display panel provided by the present invention detects the temperature, compares the detected temperature value with a preset temperature threshold, and outputs a processing signal according to the comparison result; and then according to the processing signal, control the driving circuit in the backlight control circuit to adjust the current duty ratio of the backlight current, and control the adjusted current RMS value within the range of the current RMS value matching the temperature threshold, which can reduce the backlight control circuit. Power consumption, and enable electronic components to adjust operating parameters according to actual conditions in an environment exceeding the specified parameters, and improve the adaptability of electronic products to the external environment.

[0028] Embodiment 1 of the present invention provides a control method for controlling the back...

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Abstract

The invention discloses a control method, a backlight control circuit, a liquid crystal display (LCD) panel and an LCD, aiming at solving the problem that a circuit is cut off by over-temperature protection in the prior art. The backlight control circuit comprises a backlight, a drive circuit, a control circuit and a temperature detection circuit connected with the control circuit, wherein the temperature detection circuit is used for detecting the temperature, and comparing the temperature value with the preset temperature threshold value; and the control circuit is used for controlling the drive circuit to adjust the current duty ratio of the current of the backlight according to processing signals output based on the comparison results, and controlling the current effective value to be within the current effective value variation range matched with the temperature threshold value, thus guaranteeing electron components to work still normally under the condition of exceeding the specified parameters.

Description

technical field [0001] The invention relates to the field of liquid crystal display manufacture, in particular to a control method, a backlight control circuit, a liquid crystal display panel and a liquid crystal display. Background technique [0002] With the development of liquid crystal technology and the needs of users, the size of liquid crystal display screens is also increasing, and thus the size of liquid crystal display panels is also increasing accordingly. [0003] In the prior art, LED (Light Emitting Diode, light emitting diode) light strings are widely used in large-sized liquid crystal display panels as backlight sources. In the backlight control circuit, when the driving circuit drives the backlight, it is necessary to control multiple strings of LED lights at the same time, adjust the magnitude of the current through the driving circuit, and accurately control the current of each LED light string. However, as the size of the liquid crystal display panel inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34G09G3/36
Inventor 孟智明
Owner BOE TECH GRP CO LTD
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