发明申请
- 专利标题: IMAGE PROJECTION APPARATUS
- 专利标题(中): 图像投影设备
-
申请号: US12178740申请日: 2008-07-24
-
公开(公告)号: US20090051881A1公开(公告)日: 2009-02-26
- 发明人: Toshiyuki Noda
- 申请人: Toshiyuki Noda
- 申请人地址: JP Tokyo
- 专利权人: CANON KABUSHIKI KAISHA
- 当前专利权人: CANON KABUSHIKI KAISHA
- 当前专利权人地址: JP Tokyo
- 优先权: JP2007-196743 20070727
- 主分类号: G03B21/26
- IPC分类号: G03B21/26
摘要:
The image projection apparatus includes a light source lamp including a discharge light emitting tube and a reflector, the discharge light emitting tube including a light emitting portion disposed inside of the reflector and an electrode portion disposed outside of the reflector, a cooling fan, and a duct configured to guide a cooling air flowed by operation of the cooling fan toward the light source lamp. The duct includes a first air guiding portion and a second air guiding portion that cause parts of the cooling air to respectively proceed toward a first area and a second area opposite to each other on an outer circumferential surface of the light emitting portion, and a third air guiding portion that causes another part of the cooling air to proceed toward the electrode portion.
公开/授权文献
- US07934839B2 Image projection apparatus 公开/授权日:2011-05-03