Display control apparatus having a cursor
US4768028A · kind A · utility
27Cited by
5References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 28, 1986 |
| Grant date | Aug 30, 1988 |
| Priority date | — |
| Expiry date | Mar 28, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/08
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The apparatus includes alignment means (13, 14) for determining the direction of a sight-line (12) extending from an observer (11) to a display surface (10), projection means (15, 16) for projecting an image of a graticule into the sight-line for movement therewith, and control means (17) operable to cause the display of a movable cursor on the display surface (10) when the sight-line (12) intersects the display surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.