Printing system and method

Details Printing system and method Printing system and method

1994-09-21

2000-11-07

Evans, Arthur G.

395113, 395103, 395114, G06K 1500

Patent

active

RE0369470

ABSTRACT:
A image is printed from a source of drawing instructions. The image is reducible to pixels arranged in a plurality of ranked image lines. The system employs a storage device having compressed and uncompressed regions. Each region has a designated capacity and each is arranged to store pixels of one more of the plurality of image lines. A drawing processor is coupled to the storage device and can be coupled to the source of drawing instructions for responding thereto. This drawing processor can store new pixels in the storage device for successively selected ones of the image lines. The drawing processor has a conditional device, a decompression device and an insertion device. The conditional device can compressively encode and move from the uncompressed region to the compressed region, a remote one of the image lines, if: a) the selected one of the image lines is in the compressed region, and b) the uncompressed region has reached its designated capacity. The decompression device can expansively decode the selected one of the image lines, if located in the compressed region. The insertion device can insert one or more new pixels according to the drawing instructions into the selected one of the image lines by storing the selected one in the uncompressed region. The printing system also has a printing engine coupled to the storage device for printing the plurality of image lines in rank order, decompressing compressed ones of the image lines from the compressed region before printing.

REFERENCES:
patent: 3921135 (1975-11-01), Komaru et al.
patent: 4725815 (1988-02-01), Mitchell et al.
patent: 4791680 (1988-12-01), Yokoe et al.
patent: 5068805 (1991-11-01), Tsuzuki
patent: 5206735 (1993-04-01), Gauronski

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