公开(公告)号：US20210076463A1

公开(公告)日：2021-03-11

申请号：US16562457

申请日：2019-09-06

Applicant: NOVATEK Microelectronics Corp.

Inventor： Hsiang-Yi CHIU

IPC: H05B33/08

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.

公开(公告)号：US20210063449A1

公开(公告)日：2021-03-04

申请号：US16799498

申请日：2020-02-24

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Hsiang-Yi CHIU

IPC: G01R19/165 ,  H02H1/00

Abstract: An overcurrent detector for multiple level shifter circuits includes an overcurrent detecting circuit that senses currents acquired through level shifter circuits, and that outputs an indication signal indicating occurrence of overcurrent when one of the currents sensed thereby is greater than a predefined current level.