Apparatus for converting two dimensional pixel image into one-di

Details Apparatus for converting two dimensional pixel image into one-di Apparatus for converting two dimensional pixel image into one-di

1994-09-26

1996-12-31

Bayerl, Raymond J.

Computer graphics processing and selective visual display system

Display peripheral interface input device

Light pen for fluid matrix display panel

345133, 345138, 345112, 348584, G09G 536

Patent

active

055898505

ABSTRACT:
An converter apparatus to convert the (X, Y) coordinate of the two-dimensional screen position of a pixel to a linear address. The converter apparatus, which can be used with a variety of video displays of various resolutions including 1280.times.1024, 1152.times.900, 640.times.480, 1024.times.768, 1600.times.1280, and 800.times.600, contains three circuits in parallel disposition to receive and process various portions of the X and Y bits, and to output a Z-bit linear address. The first circuit mainly contains a multiplexer and it receives lower X bits as inputs; the second circuit contains a plurality of adders and multiplexers and a logical operation circuit, and it receives higher X bits and lower Y bits as inputs; and the third circuit mainly contains a multiplexer and it receives higher Y bits and at least a portion of the lower Y bits as inputs. The converter apparatus does not require a system CPU thus very high speed conversion can be achieved.

REFERENCES:
patent: 4492161 (1985-07-01), Johnson et al.
patent: 4536801 (1985-08-01), Torkelson et al.
patent: 4841292 (1989-06-01), Zeno
patent: 5117296 (1992-05-01), Hoebing
patent: 5119442 (1992-06-01), Brown
patent: 5173948 (1992-12-01), Blackham et al.
Windows Magazine and Windows Upgrades, "Upgrade Your Video Card" Summer 1993, vol. 1 No. 1 by Ken Milburn.

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