Variable speed, image pan method and apparatus
US5075673A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 16, 1989 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | Jun 16, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0485
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A display apparatus is described having the capability to pan a viewport image across a world-plane image. The viewport image has defined boundaries and exhibits a cursor whose position is movable by a user operated mouse or keyboard controls. The invention comprises a method for providing a variable-rate pan action of the viewport image which includes panning the viewport image at a preset rate in the direction of a first viewport boundary, if the cursor has been moved to the first boundary. The viewport image is panned at a proportionally faster rate in the direction of the first viewport boundary, as the cursor is moved further beyond the first viewport boundary thus enabling a variable speed pan under user control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.