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Title:
ELECTRONIC EQUIPMENT AND IMAGE SCANNER
Document Type and Number:
Japanese Patent JP2007074535
Kind Code:
A
Abstract:

To solve the problem of an image scanner operated by USB bus power supply that a USB's specification current value is exceeded when a back light of an LCD monitor is turned on during scanning and the back light must be turned off during scanning.

The back light is turned on intermittently in synchronism with a driving signal of a motor. By turning off the back light for a period when much power is consumed by the motor, and by turning it on for a period when less power is consumed; the maximum value of a total power consumption of the image scanner is controlled and an excess of rated current of the USB is prevented.


Inventors:
SASAKI YASUSHI
Application Number:
JP2005000260981
Publication Date:
March 22, 2007
Filing Date:
September 08, 2005
Export Citation:
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Assignee:
CANON KK
International Classes:
H04N1/04; H04N1/00
Attorney, Agent or Firm:
西山 恵三
内尾 裕一



 
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