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Print method of a thick density image

IP.com Disclosure Number: IPCOM000131213D
Original Publication Date: 2005-Nov-10
Included in the Prior Art Database: 2005-Nov-10
Document File: 3 page(s) / 58K

Publishing Venue

IBM

Abstract

Disclosed is a method for improving the print performance on divided printing of a high density image.

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Print method of a thick density image

Disclosed is a method for improving the print performance on divided printing of a high density image.

Figure 1 shows the flow of this disclosure.

When the printer receives a transaction data to print after the insertion of a document, the printer creates the print image.

The printer checks the density in a certain range (=R) throughout the image whether the image can be printed by a specified speed. If the density is too high to print by the specified speed, the printer decreases the print speed to print the image.

When the printer has a limitation of its power unit, that limits the number of printing dots in a unit of time, the printer sets a limitation (=T) for the printing to protect the power unit. The limitation (T) is defined as (printing dots)*(printing speed)/(distance).

If the density of the image is above the limitation (>T) of the printer in order to print in a single operation by a single speed (=S), the printer divides the image into two parts to complete the printing in two operations. The printer creates two divided images by using two checkered pattern masks. Figure 2 shows an example of how the printer creates the divided images.

The printer checks the density of these divided images again in the double range of R (=2R). If the density of both divided images are below the half of the limitation (<T/2), the printer prints these images by double speed (=2S).

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Insertion of a document

Receive Transa...