Patent ID: 11915635
Assignee: TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 9:
10. A dimming device of a display panel, comprising:
an input unit configured to input a light-emitting signal determined according to a grayscale value of a pending displayed frame;
a low grayscale control unit configured to generate a control signal according to the grayscale value of the pending displayed frame when a light-emitting stage of the display panel is a first dimming stage; and
a light-emitting unit configured to control the display panel to emit light by superposing the control signal in the light-emitting signal when the light-emitting stage is the first dimming stage, and control the display panel to emit light by the light-emitting signal when the light-emitting stage is a second dimming stage,
wherein the control signal and the light-emitting signal are synchronously inputted, a frequency of the control signal and a frequency of the light-emitting signal are same, an amplitude of the control signal is less than an amplitude of the light-emitting signal, and a polarity of the amplitude of the control signal is opposite to a polarity of the amplitude of the light-emitting signal,
wherein the first dimming stage is a light-emitting stage when the grayscale value of the pending displayed frame does not exceed a grayscale threshold, the second dimming stage is a light-emitting stage when the grayscale value of the pending displayed frame exceeds the grayscale threshold, and the grayscale threshold is 8%-21% of a maximum grayscale value of the display panel.