Vehicular lighting device | |
ICHIKAWA, TOMOYUKI | |
2019-03-05 | |
著作权人 | KOITO MANUFACTURING CO., LTD. |
专利号 | US10220779 |
国家 | 美国 |
文献子类 | 授权发明 |
其他题名 | Vehicular lighting device |
英文摘要 | A first photosensor is sensitive to the wavelength of excitation light, insensitive to the wavelength of fluorescent light, and receives a portion of the output light to generate a first current corresponding to the amount of light received. A second photosensor is sensitive to the fluorescent light wavelength, insensitive to excitation light wavelength, and receives a portion of the output light to generate a second current corresponding to the received light amount. A first current/voltage conversion circuit outputs a first detection voltage corresponding to the voltage drop across a first resistor. A second current/voltage conversion circuit outputs a second detection voltage corresponding to the voltage drop across a second resistor. If (i) a relation between the magnitudes of the first detection voltage and the second detection voltage has reversed, or (ii) if the first detection voltage deviates from a normal voltage range, a judgment unit asserts an abnormality detection signal. |
公开日期 | 2019-03-05 |
申请日期 | 2017-06-01 |
状态 | 授权 |
内容类型 | 专利 |
源URL | [http://ir.opt.ac.cn/handle/181661/34352] ![]() |
专题 | 半导体激光器专利数据库 |
作者单位 | KOITO MANUFACTURING CO., LTD. |
推荐引用方式 GB/T 7714 | ICHIKAWA, TOMOYUKI. Vehicular lighting device. US10220779. 2019-03-05. |
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