公开(公告)号：US11343886B2

公开(公告)日：2022-05-24

申请号：US16999290

申请日：2020-08-21

Applicant: Chengdu Monolithic Power Systems Co., Ltd.

Inventor： Huafei Ding ,  Changxian Zhong

IPC: H05B45/14

Abstract: A light-emitting element driving device and controller and dimming method for the light-emitting element driving device. The light-emitting driving device has a dimming resistor and a power converter. A first current is provided to the dimming resistor, and a voltage across the dimming resistor is compared with a first threshold voltage. Then a second current is provided according to the comparison result. A dimming signal is generated based the voltage across the dimming resistor and a current flowing through the dimming resistor, to control the power converter to drive a plurality of light-emitting elements. A plurality of voltage windows may be configured for the dimming signal. a 2-step dimming function may be activated for high precision.

公开(公告)号：US20210068220A1

公开(公告)日：2021-03-04

申请号：US16999290

申请日：2020-08-21

Applicant: Chengdu Monolithic Power Systems Co., Ltd.

Inventor： Huafei Ding ,  Changxian Zhong

IPC: H05B45/14

Abstract: A light-emitting element driving device and controller and dimming method for the light-emitting element driving device. The light-emitting driving device has a dimming resistor and a power converter. A first current is provided to the dimming resistor, and a voltage across the dimming resistor is compared with a first threshold voltage. Then a second current is provided according to the comparison result. A dimming signal is generated based the voltage across the dimming resistor and a current flowing through the dimming resistor, to control the power converter to drive a plurality of light-emitting elements. A plurality of voltage windows may be configured for the dimming signal. a 2-step dimming function may be activated for high precision.