Led backlight driver circuit

A light emitting diode (LED) backlight driver circuit, comprising:

• an LED lightbar, and
• a driver module of the LED lightbar;
• wherein the driver module comprises a backlight driver integrated chip (IC) regulating an output voltage of the driver module, and the backlight driver IC comprises a first comparator correcting the output voltage of the driver module;
• an output end of each LED lightbar is coupled to an inverting input end of the first comparator, and a non-inverting input end of the first comparator is coupled to protection module having a variable output voltage;
• wherein the protection module comprises a detection unit detecting an output current of the driver module;
• wherein when the output current of the driver module detected by the detection unit is lower than a preset second current, the protection module outputs a first reference voltage to the non-inverting input end of the first comparator, when the output current of the driver module detected by the detection unit is greater than the preset second current, the protection module outputs a fifth reference voltage, which is greater than the first reference voltage, to the non-inverting input end of the first comparator.

A light emitting diode (LED) backlight driver circuit, comprising:

• an LED lightbar, and
• a driver module of the LED lightbar;
• wherein the driver module comprises a backlight driver IC regulating an output voltage of the driver module, and the backlight driver IC comprises a first comparator correcting the output voltage of the driver module;
• an output end of each LED lightbar is coupled to an inverting input end of the first comparator, an non-inverting input end of the first comparator is coupled to a protection module having a variable output voltage;
• wherein the protection module comprises a detection unit detecting an output current of the driver module;
• when the detection unit detects that the output current of the driver module is increased, a voltage output by the protection module to the non-inverting input of the first comparator is increased;
• when the detection unit detects that the output current of the driver module is reduced, the voltage output by the protection module to the non-inverting input of the first comparator is reduced.