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Image reading device

An image reading device and image reading technology, which are applied in printing devices, image communication, optics, etc., can solve the problems of low efficiency and cost

Inactive Publication Date: 2004-08-11
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, every time a plurality of originals are read, it is necessary to perform several round-trip operations between the original position and the originals, which becomes a very inefficient control that takes a lot of time.

Method used

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Examples

Experimental program
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Embodiment Construction

[0023] (first form)

[0024] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0025] figure 1 is a configuration diagram showing an image scanner as the image reading device of this embodiment. In the figure, 101 is a document, 102 is a lens, and 103 is a light receiving element group for converting an image formed by the lens 102 into an electric signal.

[0026] 104 is an image processing circuit for generating a binary image signal based on the read image signal output from the light receiving element group 103, and 105 is a line buffer. 106 is an interface circuit used for communication with the external device 115 and the external light source light quantity control circuit 112, and 107 is a line buffer control circuit for making the line buffer 105 control the light sources of each color.

[0027] 108 is a CPU (Central Processing Unit), 113 is a RAM (Random Access Memory), and 114 is a ROM (Read Only Memory). Utiliz...

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PUM

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Abstract

Provided is an image reader which can efficiently and successively read a plurality of arranged documents. The image reader is provided which reads images of documents by moving a sensor unit 202 for reading the images in a sub-scanning direction with respect to the documents. When the plurality of arranged documents 303 and 304 are read, control for returning the sensor unit 202 to its home position after document read and starting read of a next document, control for temporarily stopping the sensor unit 202 after document read and starting read of a next document, and control for moving the sensor unit 202 back by a specified distance after document read and then starting read of a next document are selectively carried out.

Description

technical field [0001] The invention relates to image reading devices such as scanners and copiers with reading and positioning functions. Background technique [0002] In recent years, due to the explosive spread and high functionality of personal computers, editing of full-color images, OCR, and the like can be processed at high speed. Along with this, flat-panel image scanning devices that can easily input images even for beginners are widespread. [0003] Recently, a method of scanning a large number of photos or films, etc., and storing image files in a hard disk as an electronic album for reference is used. In order to meet these needs, a flatbed image scanning device capable of continuously and easily reading multiple frames of multiple photos or films has been developed (for example, JP-A-2001-8002). [0004] However, in these scanners, the control is performed such that the home position (normal standby position of the reading unit) is returned every time one fram...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B27/50H04N1/04H04N1/10H04N1/193
CPCH04N1/0443H04N1/1013H04N1/0414H04N2201/0462H04N1/193H04N1/04
Inventor 石塚大介
Owner CANON KK
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