Richard William George

US Patent:

55331700, Jul 2, 1996

Filed:

Nov 22, 1994

Appl. No.:

8/344417

Inventors:

Robin L. Teitzel - Portland OR
Matthew J. Jolley - Beaverton OR
James B. Campbell - Beaverton OR
Richard K. George - Portland OR
John Wipfli - Hillsboro OR

Assignee:

ETEC Systems, Inc. - Beaverton OR

International Classification:

G06K 1500

US Classification:

395108

Abstract:

A rasterizer for generating pixel values for a pattern generation apparatus. The pixel values drive the printing mechanism of the pattern generation apparatus. The rasterizer receives a file defining the pattern to be printed, fractures the pattern into sub frames, rasterizes each sub frame and then coordinates the provision of the shaded pixel values to the pattern generation apparatus. The rasterizer of the present invention is comprised primarily of a host processing means for fracturing and translating the file into one or more sub frames of pixels; geometry engines for rasterizing each sub frame; beam boards for providing the pixel shading values to a pattern generation system; a serial bus for coupling the host processor means to the geometry engines and beam boards and a pixel bus for coupling each of the geometry engines to each of the beam boards.

US Patent:

D2451638, Jul 26, 1977

Filed:

Jun 5, 1975

Appl. No.:

5/584016

Inventors:

Richard H. George - Spring TX

International Classification:

D0704

US Classification:

D15113