Raster display position detection
US4093947A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1976 |
| Grant date | Jun 6, 1978 |
| Priority date | — |
| Expiry date | Dec 30, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/033
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In order to accurately detect and commmunicate the position of a data location in a raster type luminescent display utilizing light-sensitive detection means, the permitted response time for the light detection means is extended by allowing detection of only a portion of the data locations during each scan of raster display means. Maintenance of a predetermined relationship between the number of raster scans in a detection cycle and the particular data locations for which detection is possible on each scan permits exact definition of a target data location. Detection is aided by the superimpositon of a luminescent cursor associated with each data location for which detection is permitted as the raster display is scanned.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.