发明申请
- 专利标题: ILLUMINATION DEVICE
- 专利标题(中): 照明装置
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申请号: US14417235申请日: 2013-07-02
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公开(公告)号: US20150167924A1公开(公告)日: 2015-06-18
- 发明人: Tatsuo Uchida , Yoshito Suzuki , Tohru Kawakami , Takahiro Ishinabe , Katsunori Ehara , Yoshihiro Hashimoto , Toshiki Matsuoka , Kozo Nakamura , Yasuhisa Itoh , Yoshitaka Yamamoto , Yutaka Ishii
- 申请人: Sharp Kabushiki Kaisha , TOHOKU UNIVERSITY
- 优先权: JP2012-167663 20120727
- 国际申请: PCT/JP2013/068124 WO 20130702
- 主分类号: F21V5/00
- IPC分类号: F21V5/00
摘要:
A lighting device (100) includes: a surface light source (1); a first lens (L1) having a first focal point (F1), the first lens being provided on the light exit surface side of the surface light source; and a second lens (L2) having a second focal point (F2), the second lens being provided on a light exit surface side of the first lens, the surface light source, the first lens, and the second lens being configured such that a first virtual image (I1) is formed by the first lens and a second virtual image (I2) is formed by the second lens, wherein the first virtual image (I1) is formed between the second focal point (F2) and the first lens, the second focal point (F2) is on a side opposite to the light source side relative to a predetermined focal position f′, and at least either of a light entry surface or a light exit surface of the first lens or the second lens includes a non-revolution surface (SO) as a lens surface, and a plurality of boundary lines (B1-B4) whose curvatures vary discontinuously are provided in the non-revolution surface.
公开/授权文献
- US09217552B2 Illumination device 公开/授权日:2015-12-22
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