Graphic display method

Details Graphic display method Graphic display method

1991-03-15

1992-12-15

Oberley, Alvin E.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340731, 340729, 358182, G09G 106

Patent

active

051721023

ABSTRACT:
In the case where a map is used as a figure upon vertical scrolling for enlarging or reducing a map having a predetermined accuracy, a map having a higher accuracy as well as a map having a less amount of graphic data are subjected to vertical scrolling so that the map having a lower accuracy or the less amount of data is displayed superposing on the map having the higher accuracy. Upon vertical scrolling, the speed of vertical scrolling is improved in such a manner that the brightness of one of the maps which is gradually reduced is decreased to an extent in which a positional relation of the one map with the other map which is gradually enlarged is not unrecognizable to an operator and the one map displayed with a predetermined size is erased from a display device when the brightness of the one map is decreased to zero. Even in the case where the above-mentioned vertical scrolling and horizontal scrolling are used in combination, the scrolling is made with an improved speed. In the case where a three-dimensional figure is to be subjected to horizontal scrolling, a two-dimensional version of the three-dimensional figure from which information of height is eliminated is subjected to visual-point conversion and the visual-point converted two-dimensional figure is used upon horizontal scrolling, thereby improving the speed of horizontal scrolling.

REFERENCES:
patent: 2240420 (1941-04-01), Schnitzer
patent: 3006993 (1961-10-01), Barndt
patent: 3821468 (1974-06-01), Busch
patent: 4356511 (1982-10-01), Tsujimura
patent: 4760531 (1988-07-01), Yasui et al.

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