Graphic display apparatus with a vector generating circuit
US4580236A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 1983 |
| Grant date | Apr 1, 1986 |
| Priority date | — |
| Expiry date | May 24, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A graphic display apparatus for generating a vector comprises registers for storing a value R of a vector discrimination, a positive increment P and a negative increment N, and flip-flops for storing magnitude information of .DELTA.X, .DELTA.Y, and .DELTA.X and .DELTA.Y. An address counter of a refresh memory is counted up or down in accordance with the contents of those flip-flops. A control circuit for updating the value R of the vector discrimination is also provided, so that the vector can be generated at a high speed. The registers and the flip-flops are constructed in two stages so that data for generating the next vector can be prepared while the current vector is generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.