发明授权
- 专利标题: Projection alarm clock
- 专利标题(中): 投影闹钟
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申请号: US10138515申请日: 2002-05-06
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公开(公告)号: US06798720B2公开(公告)日: 2004-09-28
- 发明人: Rolf Wilhelm Haupt , Fritz Schäffel
- 申请人: Rolf Wilhelm Haupt , Fritz Schäffel
- 优先权: DE20108223U 20010516; DE10217516 20020419
- 主分类号: G04C1900
- IPC分类号: G04C1900
摘要:
The invention relates to a novel design for a projection alarm clock for displaying various values by means of projection, using a projector with one optical unit and one optoelectrical unit for producing the images of the data to be projected.
公开/授权文献
- US20030206494A1 Projection alarm clock 公开/授权日:2003-11-06
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