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.
CN1372512AInactive Publication Date: 2002-10-02HEWLETT PACKARD CO
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HEWLETT PACKARD CO
Publication Date
2002-10-02
Estimated Expiration
Not applicable · inactive patent

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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.
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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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