Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2006-02-28
2008-03-25
Pyo, Kevin (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C356S617000, C341S013000
Reexamination Certificate
active
07348547
ABSTRACT:
There is provided a position detecting apparatus that has a high ability of detecting a correct position even if there is mechanical play in a moving mechanical member, a position of which is detected, and an image processing apparatus provided with the position detecting apparatus. In a position detecting apparatus100of the invention, even if there is a certain degree of play in a slide plate11that moves in a slide direction DN and reading by bit mark reading sensors21to24deviates from regular reading of binary numbers, since binary numbers appended to a surface of the slide plate is formed by gray codes, a position derived by a position deriving unit is more likely to be controlled to be as small as adjacent binary numbers with respect to a slide direction of the slide plate compared with the case of the conventional simple binary numbers.
REFERENCES:
patent: 4644322 (1987-02-01), Fujita
patent: 5017972 (1991-05-01), Daughton
patent: 6885321 (2005-04-01), Blaum et al.
patent: 2-22570 (1990-05-01), None
patent: 4-226253 (2002-08-01), None
patent: 2002-332120 (2002-11-01), None
Kabushiki Kaisha Toshiba
Pyo Kevin
Sereboff Steven C.
SoCal IP Law Group LLP
Toshiba Tec Kabushiki Kaisha
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