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:
Jul. 27, 2021
Filed:
Sep. 06, 2019
Novatek Microelectronics Corp., Hsinchu, TW;
Hsiang-Yi Chiu, New Taipei, TW;
NOVATEK Microelectronics Corp., Hsinchu, TW;
Abstract
A driving circuit, for providing a driving current to a light emitting diode, includes a PWM demodulator, a current source and a local clock generator. The PWM demodulator is configured to sample a PWM input signal in reference with a local clock signal and generate a brightness code according to a duty ratio of the PWM input signal. The current source is coupled with the PWM demodulator and the light emitting diode. The current source is configured to generate the driving current with a current amplitude according to the brightness code. The local clock generator is configured to generate the local clock signal according to a global clock signal during a first cycle period of successive cycle periods of the PWM input signal. The local clock generator suspends oscillation of the local clock signal during a second cycle period of the successive cycle periods of the PWM input signal.