发明授权
US5701001A Optical bar code reading apparatus with signal processing circuit for
eliminating regular reflection condition
失效
具有消除正常反射条件的信号处理电路的光学条形码读取装置
- 专利标题: Optical bar code reading apparatus with signal processing circuit for eliminating regular reflection condition
- 专利标题(中): 具有消除正常反射条件的信号处理电路的光学条形码读取装置
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申请号: US782137申请日: 1997-01-13
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公开(公告)号: US5701001A公开(公告)日: 1997-12-23
- 发明人: Shin Sugifune , Tsutomu Kanno , Hajime Nabeya
- 申请人: Shin Sugifune , Tsutomu Kanno , Hajime Nabeya
- 申请人地址: JPX Tokyo
- 专利权人: Alps Electric Co., Ltd.
- 当前专利权人: Alps Electric Co., Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX6-214023 19940907
- 主分类号: G06K7/10
- IPC分类号: G06K7/10
摘要:
An optical reading apparatus (bar code reader) including a plurality of light emitting elements, each light emitting element emitting light in different directions onto an information recording surface which has a linear recording (bar code pattern) printed thereon. A light receiving element receives reflected light from the information recording surface and generates a recording medium read signal for each light emitting element which is transmitted to a signal processing section. The signal processing section includes a plurality of conversion processing routes for converting the recording medium read signals from the plurality of light emitting elements into a plurality of display signals. Each of the display signals is then decoded separately. When a regular reflection condition occurs in a first display signal (that is, the first display signal does not produce a valid code), but does not occur in a second display signal (that is, the second display signal produces a valid code), then the signal processing circuit only outputs the accurately decoded display signal, thereby eliminating errors caused by the occurrence of the regular reflection condition.
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