US 12,289,813 B2
Self-adaptive constant-current driving circuit and method for three-channel multi-color LED
Zhenli Liu, Jiangsu (CN); Sheng Zhou, Jiangsu (CN); Dongmin Ding, Jiangsu (CN); and Pengfei Cai, Jiangsu (CN)
Assigned to CRM ICBG(WUXI)CO., LTD., Jiangsu (CN)
Appl. No. 18/266,403
Filed by CRM ICBG (WUXI) CO., LTD., Jiangsu (CN)
PCT Filed Dec. 15, 2021, PCT No. PCT/CN2021/138234
§ 371(c)(1), (2) Date Jun. 9, 2023,
PCT Pub. No. WO2022/233139, PCT Pub. Date Nov. 10, 2022.
Claims priority of application No. 202110495126.0 (CN), filed on May 7, 2021.
Prior Publication US 2024/0121870 A1, Apr. 11, 2024
Int. Cl. H05B 45/345 (2020.01); H05B 45/10 (2020.01)
CPC H05B 45/345 (2020.01) [H05B 45/10 (2020.01)] 15 Claims
OG exemplary drawing
 
1. A self-adaptive constant-current driving circuit for a three-channel multi-color LED, comprising a decoder, a two-phase non-overlapping circuit, and a LED constant-current driving circuit, wherein
the decoder is used to determine the number of lighted channels according to a first input signal, and to generate a first switch control signal and a second switch control signal;
the two-phase non-overlapping circuit is used to modulate the first switch control signal into a first two-phase non-overlapping signal and a second two-phase non-overlapping signal, and to modulate the second switch control signal into a third two-phase non-overlapping signal and a fourth two-phase non-overlapping signal; and
the LED constant-current driving circuit is used to control an on/off state of a respective channel of the LED according to a second input signal, and to output a current to control a brightness of the respective channel of the LED according to the first two-phase non-overlapping signal, the second two-phase non-overlapping signal, the third two-phase non-overlapping signal, and the fourth two-phase non-overlapping signal.