Title:
THREE-TERMINAL LED AND DRIVE CIRCUIT THEREOF
Document Type and Number:
WIPO Patent Application WO/2013/181986
Kind Code:
A1
Abstract:
A three-terminal LED and a drive circuit thereof. The three-terminal LED (1) has an anode, a cathode and a gate. The three-terminal LED (1) comprises a LED group (3) formed by connecting at least one LED in series and a gate circuit (2), the first terminal (21) of the gate circuit (2) and the anode of the LED group (3) are connected with the anode of the three-terminal LED (1), the second terminal (22) of the gate circuit (2) and the cathode of the LED group (3) are connected with the cathode of the three-terminal LED (1), the third terminal (23) of the gate circuit (2) is connected with the gate pole of the three-terminal LED (1). The drive circuit comprises a DC power supply and at least one branch, wherein all the branches are connected between the positive terminal and the negative terminal of the DC input power supply. The branch is formed by at least one three-terminal LED (1) with the anode and the cathode connected sequentially and a constant-current source via serial connection. The constant-current source provides a control end connected with all the gate poles of the three-terminal LEDs (1). The drive circuit features simple structure, high efficiency, linear operation, no EMI problems, small size, high reliability, flexible control and wide application range.
Inventors:
LV FANGLING (CN)
Application Number:
PCT/CN2013/075792
Publication Date:
December 12, 2013
Filing Date:
May 17, 2013
Export Citation:
Assignee:
HANGZHOU ZHANSHUN TECHNOLOGY CO LTD (CN)
International Classes:
H05B37/02; H05B44/00
Foreign References:
| CN102740561A | 2012-10-17 | |||
| CN201533437U | 2010-07-21 | |||
| CN202004656U | 2011-10-05 | |||
| US20100308743A1 | 2010-12-09 | |||
| US20120032614A1 | 2012-02-09 | |||
| US20100134018A1 | 2010-06-03 |
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