Offline force effect rendering
US6005551A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1997 |
| Grant date | Dec 21, 1999 |
| Priority date | — |
| Expiry date | Apr 25, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/015
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A processor in a haptic joystick renders force effects that are applied to control handle gripped by a user. A plurality of force effects specified by a host computer to the processor are stored in a random access memory (RAM) that is coupled to the processor. Further, a plurality of force effects are stored in a read only memory (ROM) that is coupled to the processor. The processor employs a scheduler to render the force effects in a specified order, for specified time intervals. The scheduler controls how the force effects are rendered, i.e., sequentially, concatenated, and/or superimposed. A play list employed by the scheduler indicates for each increment of a servo clock when each force effect should be rendered by the processor. The scheduler has a round robin queue that can implement at least five types of effects, including: behavioral, synthesized, wave table, variable parameter, and process list.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.