Backlight drive circuit

A technology of backlight drive circuit and drive voltage, which is applied in the field of backlight, can solve problems such as increased power consumption, and achieve the effect of reducing drive voltage and backlight power consumption

Active Publication Date: 2016-12-07
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

LED lights are physical components with PN junction characteristics. As the working time becomes longer, the current flowing through the LED will increase as the temperature rises under the same voltage, so the power consumption will also increase.

Method used

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Embodiment Construction

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them.

[0023] Throughout this specification, reference to features, advantages, or similar language, does not imply that all of the features and advantages that can be achieved with the invention should be or are in any single embodiment of the invention. Rather, words referring to the features and advantages are understood to mean that a specific feature, advantage, or characteristic described in connection with an embodiment is included in at least one embodiment of the invention. Thus, discussions of the features and advantages, and similar language, throughout this specification may, but do not necessarily refer to the sa...

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PUM

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Abstract

The invention relates to a backlight drive circuit, and the drive circuit comprises a voltage supply part which is configured to supply a first drive voltage; and a voltage regulating part which is configured to output a first drive voltage to a light-emitting element when the environment temperature of the light-emitting element is lower than a preset threshold value, and to output a second drive voltage less than the first drive voltage to the light-emitting element when the environment temperature of the light-emitting element is higher than the preset threshold value.

Description

technical field [0001] The invention relates to the field of backlight technology, in particular to a backlight driving circuit. Background technique [0002] Backlight is an important part of LCD module. The main working modules of the backlight source are LED (Light Emitting Diode (light emitting diode)) driver and LED lamp. Therefore, the aspects that mainly affect the power consumption of the backlight source are the operating voltage and operating current of the LED lamp. [0003] The formula for calculating backlight power consumption is: power consumption = voltage × current. LED lights are physical components with PN junction characteristics. As the working time becomes longer, the current flowing through the LED will increase as the temperature rises under the same voltage, so the power consumption will also increase. Contents of the invention [0004] According to an aspect of the present invention, there is provided a backlight driving circuit, including: a vo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34H05B44/00
CPCG09G3/3406H05B45/18G09G2320/041H05B45/397Y02B20/30H05B45/46G02F1/133603G09G3/34
Inventor 孟昭晖
Owner BOE TECH GRP CO LTD
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