Patent
1995-07-21
1997-12-30
Jankus, Almis R.
G06T 300
Patent
active
057040273
ABSTRACT:
An apparatus for generating graphic coordinates for scan type graphic display comprises a horizontal and a vertical start position generators, a horizontal and a vertical step value generators, a horizontal and a vertical position registers, and a first and a second adders. The horizontal and vertical start position generators generate respectively graphics horizontal and vertical start positions corresponding to a screen scanning line, The horizontal and vertical step value generators respectively produce graphics horizontal and vertical step values corresponding to the screen scanning line. The horizontal and vertical position registers input and store the respective horizontal and vertical start positions and temporarily store the result from the first and the second adders correspondingly. The first adder adds the horizontal step value and the contents of the horizontal position register and then outputs the results to the horizontal position register. The second adder adds the vertical step value and the contents of the vertical position register and then outputs the result to the vertical position register.
REFERENCES:
patent: 4752828 (1988-06-01), Chapuis
patent: 4754270 (1988-06-01), Murauchi
Jankus Almis R.
United Microelectronics Corporation
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