公开(公告)号：US10342077B1

公开(公告)日：2019-07-02

申请号：US16136447

申请日：2018-09-20

Applicant: CH Lighting Technology Co., Ltd.

Inventor： Jizhong Pu ,  Caiying Gan ,  Jiaming Zhou

IPC: H05B33/08 ,  H02M7/219 ,  F21V23/02 ,  F21V25/00 ,  F21V23/00 ,  F21Y115/10

Abstract: Provided are an LED driving circuit and a tube lamp. A grounding terminal of a rectifying unit of the LED driving circuit is electrically connected to a first ground wire, and an input terminal of an impedance detection and protection unit is electrically connected to a second input terminal of a first filtering unit. The grounding terminal is electrically connected to the first ground wire. The impedance detection and protection unit is configured to detect an impedance between the second input terminal of the first filtering unit and the first ground wire, so as to control the second input terminal of the first filtering unit to connect to or disconnect from the first ground wire according to a magnitude of the detected impedance.

公开(公告)号：US11770886B2

公开(公告)日：2023-09-26

申请号：US17612578

申请日：2021-03-08

Applicant: CH LIGHTING TECHNOLOGY CO., LTD.

Inventor： Jiaming Zhou ,  Jizhong Pu

IPC: H05B45/3725 ,  H05B45/59

CPC classification number: H05B45/3725 ,  H05B45/59

Abstract: An LED driving circuit, a light tube and an illumination device are provided. The LED driving circuit includes a first AC input end, a second AC input end, a driving module, a first protection unit, a first DC output end and a second DC output end. The first protection unit includes a voltage detection subunit and an abnormality cutoff subunit, and the voltage detection subunit is connected in parallel between two corresponding voltage nodes of the driving module, and the voltage detection subunit is configured to detect a voltage value of the driving module; and the abnormality cutoff subunit is connected in series between the second input end of the driving module and the second AC input end; the first protection unit is configured to cut off a circuit of the driving module when a voltage abnormality of the driving module is detected.