发明名称 |
LIGHT-EMITTING DIODE DRIVING APPARATUS |
摘要 |
Provided is a light-emitting diode driving apparatus, including: a switching transistor which becomes an on-state or an off-state in response to a pulse width modulation signal; a light-emitting diode electrically connected with a second terminal of the switching transistor; a first comparison circuit which outputs a first voltage depending on a comparison result between a first input voltage corresponding to a voltage applied to the light-emitting diode and a first threshold voltage; a second comparison circuit which outputs a second voltage depending on a comparison result between a second input voltage corresponding to a voltage applied to the light-emitting diode and a second threshold voltage; and a signal processing circuit which detects a failure in the light-emitting diode on the basis of an output state of the pulse width modulation signal, the first voltage, the second voltage and a third voltage on the second terminal side of the switching transistor. |
申请公布号 |
EP3082382(A2) |
申请公布日期 |
2016.10.19 |
申请号 |
EP20160000770 |
申请日期 |
2016.04.04 |
申请人 |
KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO |
发明人 |
KOSHIMIZU, TORU;INOUE, MASAHIRO |
分类号 |
H05B33/08 |
主分类号 |
H05B33/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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