Patent ID: 9165511
Filing Date: 2015-10-20
Classification: G09G

Abstract:
1. A backlight driving circuit, comprising: a monitoring device; and a conversion device; wherein the conversion device comprises a microcontroller (MCU) and a switch module, a control end of the switch module is coupled to the monitoring device, and the monitoring device outputs a monitoring signal to directly turn on or turn off the switch module; an input end of a power source of the MCU is coupled to a power end of the backlight driving circuit through the switch module, and the MCU is only powered on when the switch module is turned on; and the switch module comprises a first resistor connected to the power end of the backlight driving circuit, a second resistor connected to a ground end of the backlight driving circuit, a first controllable switch, and a second controllable switch; the first controllable switch and the second controllable switch are connected in series between the first resistor and the second resistor, and the first controllable switch and the second controllable switch are connected in parallel, a first conducting end of the first controllable switch is directly coupled to a first conducting end of the second controllable and a second conducting end of the first controllable switch is directly coupled to a second conducting end of the second controllable switch; the input end of the power source of the MCU is coupled between the second resistor and a connected-in-parallel first and second controllable switches.