Printing apparatus printer driver, and buffer management method

Details Printing apparatus printer driver, and buffer management method Printing apparatus printer driver, and buffer management method

Filed on

2008-07-29

Date issued

2008-07-29

Examiner

Lee, Thomas D (Department: 2625)

Patent Class

Facsimile and static presentation processing

SubClass

Static presentation processing

SubSubClass

Memory

Other Related Categories

C709S215000

Type

Reexamination Certificate

Status

active

Patent number

07405839

Description

ABSTRACT:
In a printing apparatus which performs printing by scanning a printhead having printing elements arrayed in a predetermined direction on a printing medium in a direction crossing to the array direction on the basis of information transmitted from a host apparatus, stores print data transmitted from the host apparatus, and has a buffer smaller in capacity than a print data amount printed on the printing medium by one scanning of the printhead, the buffer is divided into a plurality of blocks corresponding to rectangular regions printed by scanning. The use order of the blocks is so managed as to circularly store print data in the blocks along with the progress of printing. When print data representing non-driving of the printing elements successively exist in a predetermined amount, the predetermined amount of print data is represented by specific control data without storing the predetermined amount of print data in the blocks. High-speed, high-quality printing can be achieved with a low-cost arrangement having a memory smaller in capacity than a data amount printed by one main scanning.

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