Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1992-12-14
1994-06-21
Weldon, Ulysses
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345134, G09G 106
Patent
active
053231732
ABSTRACT:
A display device having display memory and a display unit including a display plane for displaying contents of the display memory includes a boundary co-ordinate setting unit for setting co-ordinate values on the display plane of boundaries demarcating various display sections which are made by dividing a display area of the display plane into a plurality of areas, a co-ordinate memory for storing the set boundary co-ordinate values, an input data memory for storing input data having co-ordinate values corresponding to the display area of the display plane, a display scale factor setting unit for setting display scale factors of the input data of each of the display sections and a scale factor memory for storing the set display scale factors. A unit is provided for reading the display scale factors corresponding to the co-ordinate values of the input data read out from the input data memory on the basis of contents of the co-ordinate memory and the scale factor memory, and an operating unit is provided for operating enlargement or reduction of the co-ordinate values of the read input data in accordance with the read display scale factor, converting the co-ordinate values into display data and for supplying the display data to the display memory. A plurality of areas having different display scale factors of the input data can be displayed at the display area of the display plane.
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Konaka Kiyoshi
Sakuma Yasuaki
Shimizu Eiji
Hitachi , Ltd.
Hitachi Process Computer Engineering Inc.
Weldon Ulysses
Wu Xiao M.
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