Invention Grant
US08183795B2 LED current-supplying circuit and LED current-controlling circuit
有权
LED电流供应电路和LED电流控制电路
- Patent Title: LED current-supplying circuit and LED current-controlling circuit
- Patent Title (中): LED电流供应电路和LED电流控制电路
-
Application No.: US12489984Application Date: 2009-06-23
-
Publication No.: US08183795B2Publication Date: 2012-05-22
- Inventor: Chung-Tsai Huang , Shang-Jin Yan , Po-Yi Lee
- Applicant: Chung-Tsai Huang , Shang-Jin Yan , Po-Yi Lee
- Applicant Address: TW Taoyuan Hsien
- Assignee: Delta Electronics, Inc.
- Current Assignee: Delta Electronics, Inc.
- Current Assignee Address: TW Taoyuan Hsien
- Agency: Kirton McConkie
- Agent Evan R. Witt
- Priority: TW97124766A 20080701
- Main IPC: G05F1/00
- IPC: G05F1/00 ; H05B37/02 ; H05B39/04 ; H05B41/36
Abstract:
A LED current-controlling circuit includes a first magnetic amplifier, a first current detecting circuit, a first magnetic amplifier controller and a first diode. The first magnetic amplifier is connected to an input terminal of the LED current-controlling circuit and the first LED string. The first current detecting circuit is connected to the first LED string in series for detecting the first current flowing through the first LED string. The first magnetic amplifier controller is used for controlling on/off statuses of the first magnetic amplifier. The first diode is connected to an output terminal of the first magnetic amplifier, the first LED string and the first magnetic amplifier controller. The first magnetic amplifier controller controls on/off statuses of the first magnetic amplifier according to the magnitude of the first current, thereby maintaining the first current at a specified DC current level.
Public/Granted literature
- US20100001661A1 LED CURRENT-SUPPLYING CIRCUIT AND LED CURRENT-CONTROLLING CIRCUIT Public/Granted day:2010-01-07
Information query
IPC分类:
