Arrangement for reading image, and its control method

A control method and image reading device technology, applied in image communication, image data processing, image data processing, etc., capable of solving problems such as increased power consumption, unstable operation, and inability to detect disconnection/connection status of communication unit 122

Inactive Publication Date: 2002-02-20
CANON KK
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AI-Extracted Technical Summary

Problems solved by technology

[0006] However, the conventional image reading apparatus must inevitably include the CPU 129a for detecting the disconnection/connection state of the communication unit 122 and detecting any abnormal conditions.
Therefore, an image reading apparatus which has a simple structure, does not integrate any CPU, and operates in response to each control command from the host computer 121 transmitted via the communication unit 121 cannot ...
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Abstract

In an image reading apparatus which has an image sensing unit for reading an image, and a communication unit for transferring an image signal read by the image sensing unit to an external apparatus, a detector detects the presence/absence of abnormality of the communication unit, and when the detector detects any abnormality of the communication unit, the image reading apparatus is set in a power saving mode.

Application Domain

Character and pattern recognitionImage data processing details +1

Technology Topic

Power savingImage sensing +4

Image

  • Arrangement for reading image, and its control method
  • Arrangement for reading image, and its control method
  • Arrangement for reading image, and its control method

Examples

  • Experimental program(1)

Example

[0027] [First Embodiment]
[0028] Figure 1 is a block diagram showing the structure of the first embodiment of the image reading device of the present invention, figure 2 It is a block diagram showing the structure of the main part of the first embodiment of the image reading apparatus of the present invention. The main structure of the first embodiment of the image reading device of the present invention will refer to FIG. 1 and figure 2 Explain below.
[0029] The image reading device 1 includes a movable optical unit 4 and a circuit board 6. In the optical unit 4, the reference numeral 24 denotes a light source control circuit for turning on the light source 15. The circuit 24 includes a so-called converter circuit when a cold cathode tube is used as the light source 15. Reference numeral 19 denotes an imaging lens for generating an image of reflected light emitted by the light source 15 and reflected by a document on the CCD 20 as a photoelectric conversion element.
[0030] In the circuit board 6, reference numerals 27R, 27G, and 27B represent analog gain adjusters, which can amplify the red (R), green (G), and blue (B) analog output from the CCD 20 with different gains. Image signal. Reference numeral 28 denotes an A/D converter for converting analog image signals output from the different analog gain adjusters 27R, 27G, and 27B into digital image signals. The CCD 20, the analog gain adjusters 27R, 27G and 27B, and the A/D converter 28 are constituted as figure 2 The image sensor 30 is shown.

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