| 摘要 |
A brightness adjustment system includes a camera, a computer, and a liquid crystal display. The liquid crystal display includes a signal processor, a backlight control circuit and a backlight unit. The camera captures environmental images and sends the environmental image to the computer. The computer analyzes the environmental image to obtain a environmental brightness and sends a control signal to the signal processor according to the environmental brightness. The signal processor receives the control signal and sends an adjusting signal to the backlight unit according to the control signal. The backlight control circuit adjusts a brightness of the backlight unit according to the adjusting signal. A method of automatically adjusting brightness of a liquid crystal display is also provided.
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