发明授权
- 专利标题: Laser projector
- 专利标题(中): 激光投影机
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申请号: US12424149申请日: 2009-04-15
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公开(公告)号: US08057052B2公开(公告)日: 2011-11-15
- 发明人: Hiroshi Nishigaki , Atsuya Hirano , Ken Nishioka , Atsuhiko Chikaoka
- 申请人: Hiroshi Nishigaki , Atsuya Hirano , Ken Nishioka , Atsuhiko Chikaoka
- 申请人地址: JP Daito-shi
- 专利权人: Funai Electric Co., Ltd.
- 当前专利权人: Funai Electric Co., Ltd.
- 当前专利权人地址: JP Daito-shi
- 代理机构: Crowell & Moring LLP
- 优先权: JP2008-106333 20080416
- 主分类号: G03B21/22
- IPC分类号: G03B21/22 ; H01S3/13
摘要:
Disclosed in a laser projector to display an image by projecting a laser beam from a laser light source to a projection screen including an electromagnetic driven scan mirror to scan the laser beam from the laser light source, a detection unit to detect a back EMF which is generated by a drive of the electromagnetic driven scan mirror at a time of start-up of the laser projector, a first determination unit to determine whether a value of the back EMF which is detected by the detection unit exceeded a predetermined threshold or not and a light source control unit to start a lighting of the laser light source when the value of the back EMF is determined as exceeding the predetermined threshold by the determination unit.
公开/授权文献
- US20090262314A1 Laser Projector 公开/授权日:2009-10-22