公开(公告)号：US20180206301A1

公开(公告)日：2018-07-19

申请号：US15741992

申请日：2016-12-07

Applicant: Sengled Co., Ltd.

Inventor： Yongtao WANG ,  Junshan LOU ,  Jinxiang SHEN

IPC: H05B33/08 ,  H02H7/20

CPC classification number: H05B33/089 ,  H02H7/20 ,  H05B33/0887 ,  H05B39/044 ,  Y02B20/341

Abstract: LED device protection circuits and protection methods are provided. An exemplary LED device protection circuit includes a first comparator, a protection-signal generating circuit, a sampling-voltage acquisition circuit, and a first reference-voltage acquisition circuit. The first comparator is connected with the sampling-voltage acquisition circuit and the first reference-voltage acquisition circuit, respectively. The first comparator is further connected with the protection-signal generating circuit. The first comparator is configured for comparing a sampling voltage outputted from the sampling-voltage acquisition circuit with a first reference voltage outputted from the first reference-voltage acquisition circuit, and outputting a pulse signal in accordance with a comparison result to the protection-signal generating circuit for generating a protection signal when the pulse signal satisfies a preset condition. The protection signal is configured for turning off an output load connected to a dimmer.

公开(公告)号：US20190306944A1

公开(公告)日：2019-10-03

申请号：US16444314

申请日：2019-06-18

Applicant: SENGLED CO., LTD.

Inventor： Junshan LOU ,  Jinxiang SHEN

IPC: H05B33/08 ,  H05B37/02 ,  H01F27/30 ,  F21V23/04

Abstract: The present disclosure provides an LED lamp including one or more LED loads, a transformer, a wireless module, a control switch, and a resistor. The transformer includes a primary coil, a first secondary coil configured to power the one or more LED loads of the LED lamp, and a second secondary coil configured to power the wireless module. The resistor is connected in series with the control switch and then connected in parallel with at least one of the one or more LED loads. The wireless module is configured to send a connection signal to turn on the control switch during a turn-off process of the LED lamp.

公开(公告)号：US20190363641A1

公开(公告)日：2019-11-28

申请号：US16331795

申请日：2017-09-12

Applicant: Sengled Co., Ltd.

Inventor： Zhibin TIAN ,  Junshan LOU ,  Jinxiang SHEN

IPC: H02M7/217

Abstract: A rectifier circuit and a dimmer circuit are provided, comprising: an isolating driver circuit, a switching control circuit, a before-bridge damper circuit, and a rectifier bridge. The isolating driver circuit is connected to the before-bridge damper circuit via the switching control circuit, two ends of the switching control circuit are connected to two input ends of the rectifier bridge, respectively, and two ends of the before-bridge damper circuit are connected to the two input ends of the rectifier bridge, respectively. In the disclosed rectifier circuit and damper circuit, the isolating driver circuit receives the after-bridge control signal after the rectifier bridge, the switching control circuit controls connection or disconnection of the before-bridge damper circuit to the rectifier circuit based on the after-bridge control signal. Accordingly, the before-bridge damper circuit may be adjusted based on the after-bridge control signal, and flexibility in controlling and adjusting the rectifier bridge circuit is improved.