Display system
USRE32632E · kind E · reissue
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1985 |
| Grant date | Mar 29, 1988 |
| Priority date | — |
| Expiry date | Dec 20, 2005 |
Classification
- Technology area (CPC —)General
Abstract
A cursor control device having particular application to a computer display system is disclosed. The cursor control includes a unitary frame, having a domed portion substantially surrounding and retaining a ball which is free to rotate. X-Y position indicating means are provided, such that rotation of the ball provides signals indicative of X-Y positions on the display system. The ball is free to "float" in the vertical direction within the dome, and thereby maintain good surface contact. X-Y positions are established by movement of the control device over a surface. A display system and method is disclosed for use in conjunction with the cursor control device, which permits a user to select command options simply by movement of the displayed cursor over a "pull-down" menu bar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.