The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 18, 2025
Filed:
Jun. 28, 2023
Shanghai Bright Power Semiconductor Co., Ltd., Shanghai, CN;
SHANGHAI BRIGHT POWER SEMICONDUCTOR CO., LTD., Shanghai, CN;
Abstract
An LED dimming method, a dimming controller and system are disclosed. In a phase where a duty cycle of a PWM signal does not exceed a first threshold, every n periods of the PWM signal is taken as one set, taking a set as an output unit, and the duty cycle of the PWM signal is changed by incrementing or decrementing a average duty cycle by a first predetermined amount ΔP1 (0<ΔP1<0.2%), thereby adjusting an output current of an LED. In this way, the duty cycle of the PWM signal can be configured to increment by the first predetermined amount ΔP1 that is smaller than 0.2%. Moreover, when the first threshold is 10%, it can be ensured that each period of the PWM signal with duty cycle value within the range of 0-10% can be identified.