Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1996-06-28
1998-10-06
Mengistu, Amare
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345440, G09G 534
Patent
active
058184155
ABSTRACT:
The invention provides a graphic form inputting apparatus wherein an arbitrary one of a plurality of grids defined in advance can be selected suitably and displayed on the screen and the origin, the distances of grid lines of the grid displayed can be changed with reference to another grid. A grid origin movement section displays, when a request to move an origin of an effective grid on a display apparatus by an operator is received, one of the other grids stored in a grid information storage section which is selected by the operator to be displayed on the display apparatus. Then, when coordinate values of a destination of the movement of the origin of the effective grid are inputted by the operator, the grid origin movement section normalizes the inputted coordinate values with the grid displayed on the display apparatus and changes coordinate values of the origin of the effective grid to coordinate values obtained by the normalization. Also a grid line distance changing section and a grid axis inclination angle changing section for changing the grid line distances and the grid axis inclination angle with reference to another grid, respectively, are provided.
REFERENCES:
patent: 4267573 (1981-05-01), Chaikin et al.
HavenTree Software Ltd., EasyFlow Reference Manual, pp. 40-43 and 254-259, 1993.
Mengistu Amare
NEC Corporation
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