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Interface apparatus, printing machine information processing and printing method

An interface device, printer technology, applied in the direction of electrical digital data processing, digital output to printing unit, data processing input/output process, etc., can solve the problem that the noise cannot be removed, the noise removal circuit cannot set the optimal cutoff frequency, digital Information transmission speed is not constant, etc.

Inactive Publication Date: 2002-05-08
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the noise removal circuit based on the filter circuit having a single cutoff frequency as shown in the conventional circuit cannot set an optimum cutoff frequency if the transmission speed of digital information is not constant
[0008] Since the protocol of digital information is not judged, there is a problem that even if noise that does not exist in the protocol is input to a signal at or below the cutoff frequency, the noise cannot be removed , or similar

Method used

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  • Interface apparatus, printing machine information processing and printing method
  • Interface apparatus, printing machine information processing and printing method
  • Interface apparatus, printing machine information processing and printing method

Examples

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no. 1 example

[0020] FIG. 1 is a block diagram showing an example of an interface device according to a first embodiment of the present invention.

[0021] In FIG. 1, reference numeral 201 denotes an I / F connector input from the outside. Digital information is input to the I / F connector 201 in a similar manner to conventional connectors. The input digital information is input to the glitch noise filter 202 . When the input digital information changes within a time shorter than a predetermined time, the glitch noise filter 202 invalidates the changed value. Reference numeral 203 denotes a logic filter having a function of skipping information according to the protocol when information that does not match the protocol of the input digital information is input. A printer controller 204 and a printer engine 205 are connected to the logic filter 203, and perform printing according to input information.

[0022] For this embodiment, it is assumed that digital data input from the outside has al...

no. 2 example

[0031] Fig. 4 is a block diagram illustrating the structure of an interface device according to a second embodiment of the present invention.

[0032] In FIG. 4, reference numeral 501 denotes an I / F connector input from the outside. Digital information is input to the I / F connector 501 in a similar manner to conventional connectors. The input digital information is input to the glitch noise filter 502 . When the input digital information changes within a time shorter than a predetermined time, the glitch noise filter 502 invalidates the changed value. Reference numeral 503 denotes a logic filter which has a function of skipping information according to the protocol when information not matching the protocol of the input digital information is input. For example, in the case of using a protocol that discontinuously transmits the same information, when the same information is continuously received, a process of skipping information at a second time is performed. Information n...

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Abstract

An interface apparatus which inputs information from an external apparatus. When the inputted information is information which was changed within a predetermined time, the information is invalidated. When the inputted information is not matched with a protocol, such information is skipped. Thus, complicated noise components can be removed.

Description

technical field [0001] The present invention relates to an interface device for inputting information from an external device, a printer, an information processing method, and a printing method. Background technique [0002] Noise filters composed of resistors, capacitors, coils, etc. are used in interface devices used in conventional information processing devices or image processing devices. Digital filters obtained by replacing analog devices with digital circuits are also used. Fig. 7 shows an example of a conventional circuit. [0003] Fig. 7 is a circuit diagram showing an example of such an interface device. [0004] In FIG. 7, reference numeral 101 denotes an I / F connector. The I / F connector 101 is connected to one end of the series resistor 102 , and the other end of the series resistor 102 (not connected to the I / F connector 101 ) is connected to the shunt capacitor 103 and one end of the input device 104 . [0005] The other end of the parallel capacitor 103 (...

Claims

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Application Information

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IPC IPC(8): G06F3/00G06F13/40
CPCG06F13/4077
Inventor 樱井俊夫
Owner CANON KK
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