Backlight circuit, and method and terminal for controlling voltage of backlight circuit
A backlight circuit and voltage technology, applied in the field of terminal equipment, can solve the problems of low backlight efficiency, inability to guarantee backlight brightness, and voltage consumption.
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[0029] The backlight brightness of the terminal product is often adjustable, and several levels of brightness are set on the user interface for the user to set. The hardware achieves the purpose of changing the backlight brightness by adjusting the current in the LED. Different backlight brightness levels correspond to different current levels. The higher the LED operating current, the higher the voltage across the LED; on the contrary, the smaller the LED operating current, the lower the voltage across the LED. The LED backlight circuit with DC / DC function in the prior art always provides a sufficiently high voltage, so that the voltage provided at low brightness levels will have a lot of surplus. These voltages will be consumed in the current control circuit and become unnecessary Heat loss.
[0030] The embodiment of the present invention mainly aims at a backlight circuit with DC / DC function, and provides a backlight circuit without affecting user experience, so as to improv...
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