Title:
LED LIGHTING CIRCUIT, TEMPORAL DIMMER CIRCUIT AND CONTROL METHOD BASED ON PWM
Document Type and Number:
WIPO Patent Application WO/2022/120677
Kind Code:
A1
Abstract:
Disclosed is an LED lighting circuit based on PWM, the LED lighting circuit comprising a power source, a control circuit and an LED light-emitting element, and being characterized in further comprising a non-light-emitting load element, which is connected in parallel to the LED light-emitting element, wherein the power source is connected to a constant-current source, the constant-current source supplies power to the LED light-emitting element and the non-light-emitting load element, and when the constant-current source is in a current rising or falling phase, the control circuit controls an LED light-emitting element loop to be disconnected, and controls a non-light-emitting load element loop to be connected; and when the current of the constant-current source is in a stable state, the control circuit controls the non-light-emitting load element loop to be disconnected, and controls the LED light-emitting element loop to be connected. Further disclosed are a temporal dimmer control circuit and control method based on PWM. The present invention can solve the problem in the prior art of it not being possible for the brightness and color accuracy of a light source to meet user requirements.
Inventors:
ZHU XIAOHUI (CN)
JI XUNRAN (CN)
JI XUNRAN (CN)
Application Number:
PCT/CN2020/135124
Publication Date:
June 16, 2022
Filing Date:
December 10, 2020
Export Citation:
Assignee:
SWIT ELECTRONICS CO LTD (CN)
International Classes:
H05B45/345; H05B45/10; H05B45/20
Foreign References:
| CN104812146A | 2015-07-29 | |||
| CN107770893A | 2018-03-06 | |||
| CN201623897U | 2010-11-03 | |||
| CN110381628A | 2019-10-25 | |||
| US20140232270A1 | 2014-08-21 | |||
| CN201110272764A | 2011-09-15 |
Attorney, Agent or Firm:
RAYTO PARTNERS, P.C. (CN)
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