发明名称 |
Light emitting device open/short detection circuit |
摘要 |
The present invention discloses a light emitting device open/short detection circuit, which is used for detecting at least one light emitting device string open/short. Each light emitting device string has a first end and a second end, wherein the first end is coupled to a voltage supply circuit to supply electrical power to the light emitting devices. The open/short detection circuit includes: an abnormal voltage detection circuit coupled to the light emitting device strings for receiving voltages of the second ends respectively and generating an abnormal voltage detection signal; a voltage setting circuit coupled to the abnormal voltage detection circuit for setting an abnormal reference level; and a determination circuit coupled to the voltage setting circuit. When the abnormal voltage detection signal is equal to or over the abnormal reference level, the determination circuit generates an open/short detection signal for an abnormal condition detected. |
申请公布号 |
US2012293082(A1) |
申请公布日期 |
2012.11.22 |
申请号 |
US201113136383 |
申请日期 |
2011.07.29 |
申请人 |
HUANG PEI-CHENG;LIU KUO-CHI;LEE MING-HSUEH;CHIEN SHIH-HUA;WU CHAO-HUA;RICHTEK TECHNOLOGY CORPORATION, R.O.C. |
发明人 |
HUANG PEI-CHENG;LIU KUO-CHI;LEE MING-HSUEH;CHIEN SHIH-HUA;WU CHAO-HUA |
分类号 |
H05B37/00 |
主分类号 |
H05B37/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|