JP2006021484A - Control system of printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that a printer which can perform printing at a plurality of resolutions cannot select and print with an appropriate resolution with respect to print data not including a control command specifying a resolution. <P>SOLUTION: The control system of this printer is configured to check whether a characteristic operator to be used upon specification of high-resolution print information is present or not in the print data not including the control command specifying a resolution. When the operator is present, printing is performed at a high resolution. When it is not present, printing is performed at a low resolution. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a printer control device.

  Some printers that receive and print print data from the host can print at multiple resolutions, with these printers printing at lower resolutions faster and printing at higher resolutions slower become.

  Switching between high resolution and low resolution is specified by a control command in the print data. If there is no resolution control command in the print data, it is conventional to print at the default resolution of the printer controller. Met. However, some print data that does not have a resolution control command have high-precision print information, but information is lost because it was printed at a low resolution, or only low-precision print information. In spite of the lack of printing, printing was performed at a higher resolution, and printing was slower than necessary. For example, when printing barcodes, precise print position and line width adjustments are required, so it is necessary to print at a high resolution, but when there is no control command for specifying the resolution in the print data, a conventional printer Since printing is performed at the default resolution of the control device, if the default value is a low resolution, an expected print result may not be obtained.

  In order to specify an appropriate resolution for such a case, it is necessary to add a control command for specifying the resolution to the print data, or to set an appropriate resolution as a default value of the printer control device in advance.

Japanese Patent Laid-Open No. 05-07489

  The problem to be solved is that an appropriate resolution cannot be automatically selected for print data having no resolution information.

  The most significant feature of the present invention is that the printer control device determines whether or not high-precision print information exists in the print data, and thereby sets the resolution at the time of printing.

  The printer control apparatus of the present invention has an advantage that printing data having no control command for designating resolution can be automatically printed at an appropriate resolution.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments according to the invention will be described with reference to the accompanying drawings.

  FIG. 2 shows a conceptual diagram of the present invention. Printer B is connected to host A. The printer B has a function of performing printing at high resolution or low resolution. The printer control device C processes the print data from the host A according to the resolution, and prints it with the printer B. The automatic resolution switching process D is an additional processing unit according to the present invention.

  FIG. 1 is a flowchart showing the processing contents of the present invention. This routine starts by receiving postscript print data. First, it is determined whether or not a control command for specifying a resolution exists in the print data. When there is a control command for designating the resolution, the printing resolution follows this control command, that is, printing is performed in the same manner as in the prior art. If there is no control command for designating the resolution, it is next checked whether or not a setstrokeadjust operator exists in the print data. Since the setstroke adjustment operator performs fine control over the PostScript drawing operator, it is determined that the print data including this operator includes high-precision print information, and printing is performed at a high resolution. If the setstrokeadjust operator does not exist in the print data, it is subsequently determined whether or not the setlinewidth operator exists in the print data. Since the setlinewidth operator can finely control the postscript drawing operator as in the case of the setstrokeadjust operator, printing is performed at a high resolution when the operator exists in the print data. If none of the control command for specifying the resolution, the setstroke adjustment operator, and the setlinewidth operator are included in the print data, it is determined that high-precision print information is not included, and printing at a low resolution is executed.

It is the flowchart which showed embodiment of this invention. (Example 1) It is the conceptual diagram which showed embodiment of this invention. (Example 1)

Explanation of symbols

A Host B Printer C Printer control device D Automatic resolution switching processing

Claims (2)

  In a printer capable of printing by switching between multiple resolutions, there is provided means for analyzing the characteristics of print data and automatically switching between high resolution and low resolution operations when print data having no resolution information is received. A printer control device. 2. The determination criterion for the high resolution / low resolution of the print data is whether or not there is a characteristic operator used when high-precision print information is specified in the print data. The printer control device described.

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