公开(公告)号：US11076466B2

公开(公告)日：2021-07-27

申请号：US17030413

申请日：2020-09-24

Applicant: QISDA CORPORATION

Inventor： Tsung-Hsun Wu ,  Chi-Jen Chen ,  Yuan-Ting Fang

IPC: H05B45/10 ,  H05B47/10

Abstract: A light intensity adjustment circuit includes a delay circuit, a switching circuit and a light-emitting circuit. The delay circuit includes a capacitor and is used to receive a first pulse width modulation signal and generate a delay signal according to the first pulse width modulation signal. The switching circuit includes a switching unit and an isolation circuit. The switching unit includes a control terminal coupled to the delay circuit and used to receive the delay signal, and a first terminal used to generate a current according to the delay signal. The isolation circuit is coupled to the first terminal of the switching unit and generate a second pulse width modulation signal according to the current. The light-emitting circuit is used to receive the second pulse width modulation signal and emit light accordingly.

公开(公告)号：US20210204378A1

公开(公告)日：2021-07-01

申请号：US17030413

申请日：2020-09-24

Applicant: QISDA CORPORATION

Inventor： Tsung-Hsun Wu ,  Chi-Jen Chen ,  Yuan-Ting Fang

IPC: H05B47/10

Abstract: A light intensity adjustment circuit includes a delay circuit, a switching circuit and a light-emitting circuit. The delay circuit includes a capacitor and is used to receive a first pulse width modulation signal and generate a delay signal according to the first pulse width modulation signal. The switching circuit includes a switching unit and an isolation circuit. The switching unit includes a control terminal coupled to the delay circuit and used to receive the delay signal, and a first terminal used to generate a current according to the delay signal. The isolation circuit is coupled to the first terminal of the switching unit and generate a second pulse width modulation signal according to the current. The light-emitting circuit is used to receive the second pulse width modulation signal and emit light accordingly.