Control circuit, backlight driving device and display device

Abstract

The present invention provides a control circuit, including a current source module, a conversion module and a first comparison module: the current source module is used to generate a current signal whose magnitude is positively correlated with temperature; the conversion module includes a first conversion unit and / or a second conversion unit , the first conversion unit is used to provide the first voltage signal to the positive input terminal of the first comparison module, and the first voltage signal is positively correlated with the magnitude of the current signal generated by the current source module; the second conversion unit is used to provide the first comparison module The reverse input terminal of the module provides a second voltage signal, and the second voltage signal is negatively correlated with the magnitude of the current signal generated by the current source module; the first comparison module is used to output control when the positive input terminal is greater than the voltage signal of the reverse input terminal signal, the control signal is negatively correlated with the voltage signal difference between the positive input terminal and the negative input terminal of the first comparison module. Correspondingly, the invention also provides a backlight driving device and a display device, and the invention can prevent the temperature of the display device from being too high.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a control circuit, a backlight driving device and a display device. Background technique [0002] In a liquid crystal display device, both the driving circuit and the backlight source generate a large amount of heat during operation, which leads to an increase in the temperature of the liquid crystal display device. When the temperature is too high to a certain height, it may cause the liquid crystal display panel or the driving circuit to be in an abnormal working state or even burn out. Contents of the invention [0003] The present invention aims to solve at least one of the technical problems in the prior art, and proposes a control circuit, a backlight driving device and a display device to prevent the temperature of the display device from being too high. [0004] In order to solve one of the above technical problems, the present invention provides a control circuit, in...

AI Technical Summary

Problems solved by technology

[0002] In a liquid crystal display device, both the drive circuit and the backlight will generate a large amount of heat during operation, which will cause the temperature of the liquid crystal display device to rise

When the temperature is too high to a certain height, it may cause the LCD panel or the driving circuit to be in an abnormal working state or even burn out.

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