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Advanced media determination system for ink jet printing

A technology for media and input media, applied in printing devices, printing, transfer materials, etc., to solve problems such as misidentification of new non-featured media, deterioration of print quality, etc.

Inactive Publication Date: 2002-10-02
HEWLETT PACKARD CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately it tends to incorrectly identify new non-characteristic media, resulting in poor print quality
Finally, one of the most serious disadvantages of such a system is that even multiple different types of media with completely different print mode classifications may produce the same reflectance

Method used

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  • Advanced media determination system for ink jet printing
  • Advanced media determination system for ink jet printing
  • Advanced media determination system for ink jet printing

Examples

Experimental program
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Embodiment Construction

[0093] Detailed Description of Preferred Embodiments

[0094] figure 1Showing an embodiment of an inkjet printing machine constructed in accordance with the present invention, it is an inkjet printer 20 that can be used in industrial, office, home or other environments to print business reports, letters, desktop publications, art goods and so on. A wide variety of inkjet printers are available in the market. For example, some inkjet printing machines that can embody the present invention include plotters, portable printing devices, copiers, cameras, image printers, facsimile machines, and the like. In general terms, the invention is described in the context of an inkjet printer 20 particularly suited for a home environment.

[0095] Although there are various types of printer components, a typical inkjet printer 20 includes a chassis 22 surrounded by a housing or housing 23, the main body of which is removed to allow a clearer view of the internal components. The printing ...

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PUM

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Abstract

The present invention provides a system for classifying the type of input media entering an inkjet or other printing machine without requiring any special manufacturer markings to identify the media. The leading edge of the input media (170) is optically scanned with a violet light (520) to obtain diffuse reflectance (200) and specular reflectance (200') values. These reflectance values ​​are Fourier transformed to produce a spatial frequency signal for the input medium. Compare this spatial frequency with known values ​​for different media types, in terms of major categories such as transparencies, glossy photo media, fine paper, plain paper, and within these categories such as matte photo premium media and very glossy photo media and other specific media types to classify input media. Select the optimal print mode for a given media type, producing outstanding images without user intervention. A printing machine for implementing the method is also provided.

Description

[0001] related application [0002] This application is a continuation of co-pending U.S. Patent Application No. 09 / 430,489, filed October 29, 1999, and a continuation of U.S. Patent Application No. 09 / 183,086, filed October 10, 1998, both of which belong to the present inventor. It is also a follow-up application of US Patent No. US6,036,298 granted on March 14, 2000. field of invention [0003] The present invention relates generally to inkjet printing machines, and more particularly to an optical detection system for determining information about the type of print media (e.g., transparencies, plain paper, fine paper, photographic paper, etc.) entering the print zone, allowing The printing machine can automatically adapt the printing mode to produce the best image on a specific type of input media, without requiring user intervention. Background of the invention [0004] Inkjet printing machines use ink cartridges, commonly referred to as "pens," to eject droplets of liqu...

Claims

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Application Information

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IPC IPC(8): B41J2/01B41J2/125B41J2/21B41J11/00B41J11/46B41J13/00B41J19/20B41J29/393B65H7/06G03G15/00H05B44/00
CPCB41J2/125B41J2/2135B41J11/009B41J11/46B41J13/0054B41J19/205B41J29/393
Inventor S·H·瓦尔克S·A·斯科菲尔德
Owner HEWLETT PACKARD CO
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