发明名称 |
LED driving device, illuminator, and Liquid Crystal Display device |
摘要 |
The present invention provides a light emitting diode (LED) driving device as a semiconductor device, which comprises: a direct current/direct current (DC/DC) controller, for controlling an output segment that is used to generate an output voltage from an input voltage and supply the output voltage to an LED; an output current driver, for generating an output current of the LED; and an LED short-circuit detection circuit, for monitoring a cathode voltage of the LED to perform an LED short-circuit detection, wherein the LED short-circuit detection circuit controls whether an action is performed or not according to a short-circuit detection enable signal input from outside the LED driving device. |
申请公布号 |
US8754579(B2) |
申请公布日期 |
2014.06.17 |
申请号 |
US201213544537 |
申请日期 |
2012.07.09 |
申请人 |
Rohm Co., Ltd. |
发明人 |
Kanemitsu Ryosuke;Nakayama Masaaki |
分类号 |
H05B37/03;H05B37/02 |
主分类号 |
H05B37/03 |
代理机构 |
Fish & Richardson P.C. |
代理人 |
Fish & Richardson P.C. |
主权项 |
1. A light emitting diode (LED) driving device, comprising:
a direct current/direct current (DC/DC) controller, for controlling an output segment that is used to generate an output voltage from an input voltage and supply the output voltage to an LED; an output current driver, for generating an output current of the LED; and an LED short-circuit detection circuit, for monitoring a cathode voltage of the LED to perform an LED short-circuit detection, wherein the LED short-circuit detection circuit controls whether or not an action is performed according to a short-circuit detection enable signal input from outside the LED driving device, and wherein the LED driving device supplies the output current to the LED without performing the LED short-circuit detection if the LED short-circuit detection circuit makes the action invalid according to the short-circuit detection enable signal.
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地址 |
Kyoto JP |