Patent ID: 11889600
Assignee: TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A display device, comprising a display panel, the display panel comprising:
a backlight module comprising a back plate, a light source assembly, and a printed circuit board disposed on the back plate, wherein the printed circuit board comprises a low voltage level signal generation circuit, and the low voltage level signal generation circuit comprises:
a signal input terminal;
a signal output terminal;
a detection sub-circuit, wherein one end of the detection sub-circuit is connected to the signal input terminal, the detection sub-circuit comprises at least one photoresistor, the photoresistor can obtain a light signal from the light source assembly to change a resistance value, and the detection sub-circuit can generate a first signal; and
a generation sub-circuit, wherein one end of the generation sub-circuit is connected to the other end of the detection sub-circuit, the other end of the generation sub-circuit is connected to the signal output terminal, and the generation sub-circuit is configured to obtain the first signal and process the first signal to obtain a low voltage level signal;
a thin film transistor; and
a driving circuit connected to the low voltage level signal generation circuit in the backlight module and the thin film transistor, wherein the driving circuit can obtain the low voltage level signal from the low voltage level signal generation circuit and transmit the low voltage level signal to the thin film transistor for the low voltage level signal to turn off the thin film transistor, wherein the generation sub-circuit comprises:
a driving chip, wherein one end of the driving chip is connected to the other end of the detection sub-circuit, the other end of the driving chip is connected to the signal output terminal, and the driving chip outputs the low voltage level signal according to the first signal; and
a memory chip, communicatively connected to the driving chip, and storing a memory mapping table and outputs a voltage value corresponding to the first signal and obtained according to the memory mapping table to the driving chip for the driving chip to output the low voltage level signal according to the voltage value.