Shadow mask assemblies and reusing methods of shadow mask assemblies thereof

An electronic device comprises a power supply circuit and a LED module, the power supply circuit is used to output the power supply voltage, the LED module comprises a positive terminal, a ground terminal, and at least one LED lamp and a detection resistor connected between the positive terminal and the ground terminal, wherein, the electronic device further comprises a backlight control circuit, the backlight control circuit comprises:

• a driving chip comprising a feedback terminal, a reference voltage terminal and an output terminal, the reference voltage terminal is connected with a reference voltage;
• a feedback voltage regulating unit connected between the feedback terminal of the driving chip and a remote terminal of the detection resistor for adjusting the detection voltage of the remote terminal of the detection resistor to the feedback terminal voltage of the feedback terminal;
• and
• a power supply regulating unit connected between the power supply circuit of the electronic device and the positive terminal of the LED module and connected with the output terminal of the driving chip for adjusting the power supply circuit to output to a supply voltage of the LED module in response to the control of the driving chip;
• wherein the feedback voltage adjustment unit is also connected to a 2D/3D signal terminal for receiving a two-dimensional signal or a three-dimensional signal generated by the 2D/3D signal terminal, wherein the 2D/3D signal terminal generates a two-dimensional signal when the electronic device is in the two-dimensional mode and generates a three-dimensional signal when the electronic device is in the three-dimensional mode;
• when the three-dimensional signal is received, the feedback voltage regulating unit controls the lowering of the feedback voltage of the detection voltage to the feedback terminal so that the feedback terminal voltage is smaller than the reference voltage, the driving chip controls the power supply adjusting unit to increase the supply voltage to the LED module when the feedback terminal voltage is less than the reference voltage to increase the current flowing through the LED lamp of the LED module.