Ink jet recording apparatus and ink jet recording method

Details Ink jet recording apparatus and ink jet recording method Ink jet recording apparatus and ink jet recording method

1992-06-05

2000-01-11

Le, N.

Incremental printing of symbolic information

Ink jet

Controller

B41J 2205

Patent

active

060127961

ABSTRACT:
A gray scale level data of each pixel is obtained as data taking 5 levels between 0 and 4 corresponding to the number of ejections from 4 individual discharging portions by the pseudo-halftoning processing. The pointer directs sequentially the memories every time an ejection data is set in responsive to the 5 level data. As a result, in forming a plurality of pixels sequentially, 4 individual discharging portions are used sequentially. So far, it will be appreciated that even if ejection failures occur in either of a plurality of discharging portions of the ink jet recording head, relatively high-quality recorded images are obtained and the lifetime of the recording head can be increased.

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IBM Technical Disclosure Bulletin, J. Kitamura, "Draft Font Generation" vol. 27, No. 4B, p.2504, Sep. 1984.

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