Print medium identifying device, printing apparatus, and print medium identifying method
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United States of America Patent
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Nov 24, 2009
Grant Date -
Oct 6, 2005
app pub date -
Mar 29, 2005
filing date -
Mar 31, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An object of the present invention is to provide a print medium identifying device that can accurately detect various print media. Thus, according to the present invention, a light emitting section (LED) irradiates a surface of a print medium P with ultraviolet light and different light of a longer wave. A light receiving section (regular-reflection photo sensor and diffusive-reflection photo sensor) receives the light reflected by the surface of the print medium P to output a signal corresponding to the quantity of light received. Identifying section (signal processing section) identifies the type of the print medium on the basis of a signal output by the light receiving section when the print medium is irradiated with the ultraviolet light and a signal output by the light receiving section when the print medium is irradiated with the different light.
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