BACKLIGHT CIRCUIT, METHOD FOR CONTROLLING VOLTAGE OF BACKLIGHT CIRCUIT AND TERMINAL

摘要

A backlight circuit, a method for controlling the voltage of the backlight circuit and a terminal are provided. The backlight circuit includes a light emitting device module (8), a current control circuit module (3), a switch powder supply module (5) and a micro-processor (4). The light emitting device module (8) is connected with the current control circuit module (3) in series, and the voltage is supplied to the light emitting device module (8) by the switch powder supply module (5). During the process of turning on the backlight, the output voltage of the switch powder supply module (5) is controlled by the micro-processor (4), and the voltage of the current control circuit module (3) is equal to or slightly higher than the previously stored reference voltage of the current control circuit module (3) that corresponds to the corresponding brightness level. The supplying voltage can be automatically controlled by the backlight circuit according to the backlight brightness level, and the backlight power consumption is reduced without influencing user's experience, thus the purpose of saving energy is achieved.