发明申请
- 专利标题： LIGHTING DEVICE
- 专利标题（中）： 照明设备
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申请号： US13449624申请日： 2012-04-18
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公开(公告)号： US20120268927A1公开(公告)日： 2012-10-25
- 发明人: Takashi SAITO , Ayako Tsukitani , Hiroki Noguchi , Naohiro Toda , Sayaka Yamaguchi
- 申请人： Takashi SAITO , Ayako Tsukitani , Hiroki Noguchi , Naohiro Toda , Sayaka Yamaguchi
- 申请人地址： JP Osaka
- 专利权人： Panasonic Corporation
- 当前专利权人： Panasonic Corporation
- 当前专利权人地址： JP Osaka
- 优先权： JP2011-094841 20110421
- 主分类号： F21S4/00
- IPC分类号： F21S4/00
摘要：
A lighting device includes a lower irradiation portion for irradiating light mainly in a vertically downward direction and an upper irradiation portion for irradiating light more horizontally than the lower irradiation portion. An irradiation angle of the upper irradiation portion is smaller than that of the lower irradiation portion. The upper irradiation portion is configured to reduce an S/P ratio denoting a ratio of scotopic vision luminance to photopic vision luminance.
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