Printing apparatus

Details Printing apparatus Printing apparatus

1993-04-30

1996-08-20

Bayerl, Raymond J.

395102, G06F 1500

Patent

active

055486908

ABSTRACT:
An interpolation dot generating circuit having a determination circuit, a selecting circuit, and interpolation data A for 300 dpi and the interpolation data B for 600 dpi. A one of the interpolation data A or B is selected based on a signal output from a selection switch which shows a resolution of 300 dpi or 600 dpi. If interpolation dot data is generated from the interpolation data A or B, selected by the determination circuit, the dot data from the line memory and the generated interpolation dot data are output to the data selector. The data selector outputs image information VDO based on the dot information and the interpolation dot data output thereto. Therefore, a printing output with higher-quality can be obtained since a high dot density and high-level gradation in compliance with the preset resolution is produced. As a result, a nicely appearing and accurate image can be recorded.

REFERENCES:
patent: 4847641 (1989-07-01), Tung
patent: 5005139 (1991-04-01), Tung
patent: 5008752 (1991-04-01), Van Nostrand
patent: 5045869 (1991-09-01), Isaka et al.
patent: 5124802 (1992-06-01), Ito et al.
patent: 5157417 (1992-10-01), Anzai
patent: 5235436 (1993-08-01), Sakamoto et al.
patent: 5301037 (1994-04-01), Kang et al.
patent: 5327257 (1994-07-01), Hrytzak et al.

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