JPH02291763A - Scanner device - Google Patents

Scanner device

Info

Publication number
JPH02291763A
JPH02291763A JP11266089A JP11266089A JPH02291763A JP H02291763 A JPH02291763 A JP H02291763A JP 11266089 A JP11266089 A JP 11266089A JP 11266089 A JP11266089 A JP 11266089A JP H02291763 A JPH02291763 A JP H02291763A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
speed
subscanning
cpu
image data
buffer memory
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11266089A
Inventor
Toshio Seto
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Abstract

PURPOSE: To increase the processing speed by providing a subscanning control means which can control the subscanning speed to plural stages and a speed detecting means which detects the image data taking-in average speed of a host device and setting a maximum subscanning speed in such range based on this image data taking-in average speed that a buffer memory does not overflow.
CONSTITUTION: A transfer speed detecting circuit 30 outputs a detected transfer speed to a CPU 31, and the CPU 31 sets the subscanning speed based on this transfer speed so that image data taken into a buffer memory 27 and image data read out from the buffer memory 27 are balanced, and the rotating speed of a subscanning motor 32 is controlled based on the set subscanning speed. That is, the CPU 31 properly controls the rotating speed of the subscanning motor 32 in plural stages, and the rotating speed corresponding to the set subscanning speed is selected to control the subscanning speed. At the time of setting the subscanning speed, the CPU 31 sets such highest subscanning speed that the buffer memory 27 does not overflow.
COPYRIGHT: (C)1990,JPO&Japio
JP11266089A 1989-05-01 1989-05-01 Scanner device Pending JPH02291763A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11266089A JPH02291763A (en) 1989-05-01 1989-05-01 Scanner device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11266089A JPH02291763A (en) 1989-05-01 1989-05-01 Scanner device

Publications (1)

Publication Number Publication Date
JPH02291763A true true JPH02291763A (en) 1990-12-03

Family

ID=14592289

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11266089A Pending JPH02291763A (en) 1989-05-01 1989-05-01 Scanner device

Country Status (1)

Country Link
JP (1) JPH02291763A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0614159A (en) * 1992-06-24 1994-01-21 Fujitsu Ltd Image scanner reading method
US6962288B2 (en) 2000-09-05 2005-11-08 Canon Kabushiki Kaisha Image reading apparatus and method
JP2008271035A (en) * 2007-04-18 2008-11-06 Canon Inc Document reader and its data transfer method
US7742201B2 (en) 1998-11-11 2010-06-22 Canon Kabushiki Kaisha Control method for document scanning device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0614159A (en) * 1992-06-24 1994-01-21 Fujitsu Ltd Image scanner reading method
US7742201B2 (en) 1998-11-11 2010-06-22 Canon Kabushiki Kaisha Control method for document scanning device
US6962288B2 (en) 2000-09-05 2005-11-08 Canon Kabushiki Kaisha Image reading apparatus and method
JP2008271035A (en) * 2007-04-18 2008-11-06 Canon Inc Document reader and its data transfer method
US8064106B2 (en) 2007-04-18 2011-11-22 Canon Kabushiki Kaisha Document reading apparatus and related data transfer method

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