Apparatus for continuous variation of object size on a raster type video screen
US4107665A · kind A · utility
35Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1977 |
| Grant date | Aug 15, 1978 |
| Priority date | — |
| Expiry date | Jun 23, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63F13/55
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
Apparatus for continuous variation of object size on a raster type video screen in a television game. The input of a voltage controlled oscillator is varied by a game controller. The output of the oscillator drives horizontal and vertical counters at rates corresponding to the object size. These counters provide respectively horizontal and vertical addresses to a picture generator read only memory. The faster the counters are incremented the smaller the object; and with regard to the vertical address, horizontal lines of the picture are actually skipped in order to reduce the size of the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.