Autocorrection for uneven print pressure on print media
First Claim
1. A method for printing, comprising:
- measuring a first width of a media in a printer;
comparing, via a hardware processor of the printer, the first width of the media with a second width of a printhead within the printer, said printhead comprising a plurality of heating elements, wherein said printhead;
has a width which spans at least the full width of the media; and
is mounted in the printer such as to apply a pressure to said media while printing the media;
determining by the hardware processor, based on the comparing of the first width with the second width, a variation of the pressure of the printhead across the media during the printing; and
during the printing, adjusting for each heating element of the printhead along the first width of the media an intensity of each heating element, wherein;
each said intensity adjustment for each heating element represents either an increase in heat or a decrease in heat, relative to a heat intensity required to generate a pixel at a uniform printhead pressure; and
said adjustments at each heating element are configured to compensate for the variations of the pressure of the printhead across the media.
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Accused Products
Abstract
A printer may be used to print on print media, such as labels, where the print media, as fed through the print, spans substantially less than the full width of the printhead and platen. This may result in uneven print pressure across the print media during the print process. The uneven print pressure, in turn, may result in an uneven print density on the print media, which causes poor print quality. A system and method is employed with identifies the uneven print pressure, and compensates for the uneven print pressure to ensure consistent print density and good print quality. Along segments of the printhead which apply a below average pressure to the print media, the printhead is configured to apply a proportionately higher density of an appropriate contrast-inducing element, such as ink or heat. Along segments of the printhead which apply an above average pressure to the print media, the printhead is configured to apply a proportionately lower density of an appropriate contrast-inducing element, such as ink or heat.
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Citations
10 Claims
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1. A method for printing, comprising:
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measuring a first width of a media in a printer; comparing, via a hardware processor of the printer, the first width of the media with a second width of a printhead within the printer, said printhead comprising a plurality of heating elements, wherein said printhead; has a width which spans at least the full width of the media; and is mounted in the printer such as to apply a pressure to said media while printing the media; determining by the hardware processor, based on the comparing of the first width with the second width, a variation of the pressure of the printhead across the media during the printing; and during the printing, adjusting for each heating element of the printhead along the first width of the media an intensity of each heating element, wherein; each said intensity adjustment for each heating element represents either an increase in heat or a decrease in heat, relative to a heat intensity required to generate a pixel at a uniform printhead pressure; and said adjustments at each heating element are configured to compensate for the variations of the pressure of the printhead across the media. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for printing, comprising:
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measuring a first width of a media in a printer arranged and configured to feed the media along a print path between a printhead and a platen; comparing, via a hardware processor of the printer, a first width of the media with a second width of the printhead within the printer, said printhead comprising a plurality of heating elements, wherein said printhead; has a width which spans at least the full width of the media; and is mounted in the printer such as to apply a pressure to said media while printing the media; determining by the hardware processor, based on the comparing of the first width with the second width, a variation of the pressure of the printhead across the media during the printing resulting from a compression of the media by a combination of the printhead and the platen and determining the variation of the pressure further comprises determining an induced pressure variation between; a first portion of the print path where a first portion of the printhead presses on the media which is interposed between the first portion of the printhead and the platen, and a second portion of the print path wherein said media is not present; and during the printing, adjusting for each heating element of the printhead along the first width of the media an intensity of each heating element, wherein; each said intensity adjustment for each heating element represents either an increase in heat or a decrease in heat, relative to a heat intensity required to generate a pixel at a uniform printhead pressure; and said adjustments at each heating element are configured to compensate for the variations of the pressure of the printhead across the media.
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Specification