Patent ID: 9182629
Filing Date: 2015-11-10
Classification: G02F,G09G,H05B

Abstract:
1. A light emitting diode (LED) backlight source drive circuit, comprising: a voltage input terminal; a coupling module connected to the voltage input terminal for receiving a current complying with a total working voltage of two power consumption modules from the voltage input terminal, and converting the current into a current complying with a working voltage of one power consumption module; and a rectifier module connected to the coupling module for inputting the current complying with the working voltage of one power consumption module into two serially-connected power consumption modules, thereby supplying power to the power consumption modules; wherein the rectifier module comprises a first current input terminal, a current output terminal and a second current input terminal; wherein the first current input terminal of the rectifier module is connected to the coupling module for inputting the current complying with the working voltage of one power consumption module into two serially-connected power consumption modules, the current output terminal of the rectifier module is connected to a current input terminal of the two serially-connected power consumption modules, and the second current input terminal of the rectifier module is connected to a current output terminal of the two serially-connected power consumption modules; wherein the LED backlight source ddrive circuit further comprising a voltage conversion module, a control.module and a protecting module; wherein the voltage conversion module is configured for receiving the current from a current output terminal of an external power source, and converting the current into the current complying with the total working voltage of two power consumption modules to be inputted into the coupling module; wherein the protecting module is connected to the control module, wherein if the power consumption module is in an open-circuit state, an over-current state or a short-circuit state, the protecting module issues a high or low voltage-level fault signal to the control module; and wherein after the fault signal is received by the control module, the voltage conversion module is disabled by the control module.