Backlight adjustment circuit and backlight adjustment method

Abstract

The invention relates to the field of display circuits, and discloses a backlight adjustment circuit and a backlight adjustment method. The backlight adjustment circuit comprises a backlight adjustment unit, an amplification module and a switching module, wherein the backlight adjustment unit is used for generating backlight adjustment signals according to environmental light intensity changes, and the backlight adjustment unit comprises a first light detection module and a second light detection module for generating corresponding photocurrent signals according to the environmental light intensity changes in an on state; the amplification module is used for receiving the photocurrent signals and converting the photocurrent signals to the backlight adjustment signals; and the switching module is used for enabling one of the first light detection module and the second light detection module to enter the on state according to the backlight adjustment signals. when the current working light detection module works abnormally, the current light detection module is automatically switched to the other light detection module, the backlight adjustment circuit of the display device is ensured to work continuously, and the stability of the backlight adjustment circuit of the liquid crystal display device is improved.

Description

technical field [0001] The invention relates to the field of display circuits, and more particularly relates to a backlight adjustment circuit for driving a backlight and a backlight adjustment method. Background technique [0002] A liquid crystal display device is a display device that uses the phenomenon that the alignment direction of liquid crystal molecules changes under the action of an electric field to change the light transmittance of a light source. Due to the advantages of good display quality, small size and low power consumption, liquid crystal display devices have been widely used in mobile terminals such as mobile phones and large-sized display panels such as flat-panel televisions. [0003] The liquid crystal display device includes a backlight assembly for generating backlight. The backlight assembly includes multiple LEDs (Light Emitting Diodes, light emitting diodes) as light sources. The backlight assembly is located on the second surface side of the f...

AI Technical Summary

Problems solved by technology

However, when the backlight adjustment circuit of the prior art works abnormally in the light detection module, its backlight adjustment circuit cannot perform normal backlight adjustment.

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