US 11,854,465 B2
Driving circuit of display device and display device
Bo Yang, Guangdong (CN); and Pengfei Liang, Guangdong (CN)
Assigned to Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Shenzhen (CN)
Appl. No. 17/040,602
Filed by Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Guangdong (CN)
PCT Filed Jun. 3, 2020, PCT No. PCT/CN2020/094130
§ 371(c)(1), (2) Date Sep. 23, 2020,
PCT Pub. No. WO2021/227148, PCT Pub. Date Nov. 18, 2021.
Claims priority of application No. 202010402876.4 (CN), filed on May 13, 2020.
Prior Publication US 2023/0104084 A1, Apr. 6, 2023
Int. Cl. G09G 3/32 (2016.01); G09G 3/20 (2006.01)
CPC G09G 3/32 (2013.01) [G09G 3/2011 (2013.01); G09G 3/2014 (2013.01); G09G 3/2081 (2013.01); G09G 2300/0426 (2013.01); G09G 2300/0852 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0233 (2013.01); G09G 2320/0242 (2013.01); G09G 2320/064 (2013.01); G09G 2360/141 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A driving circuit of a display device, comprising:
an input unit;
a control unit coupled to the input unit; and
a light emitting unit coupled to the control unit, and the control unit configured to drive the light emitting unit to emit light;
wherein the control unit comprises a pulse width modulation (PWM) control unit and a pulse amplitude modulation (PAM) control unit, the PWM control unit and the PAM control unit are mutually independent, the PWM control unit is configured to control a light emitting time of the light emitting unit, and the PAM control unit is configured to control a magnitude of a driving current in the light emitting unit; and
wherein the PWM control unit comprises a frequency sweep control module, a PWM data control module, and a PWM time control module, a first end of the PWM time control module is coupled to the frequency sweep control module, a second end of the PWM time control module is coupled to the PWM data control module, and a third end of the PWM time control module is coupled to the light emitting unit.