Graphics display pointer with integrated selection
US5912659A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1997 |
| Grant date | Jun 15, 1999 |
| Priority date | — |
| Expiry date | Sep 3, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/83
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A threshold discrimination filter circuit compares signals output by a graphic input device such as an isometric joystick including strain gauges and a fixed resistance in a hierarchical voltage divider with threshold reference signals and corrects the output of the graphic input device based on previously stored samples thereof when a selection or deselection action by a user is discriminated to values at a time of onset of selection. Onset of selection may be achieved by estimating maximum curvature of a plot of output values over time. Changes in output signals during selection and other signal signatures such as would correspond to a lift are exploited to provide a plurality of selection operations which can be recognized. User actions may be adaptively captured to increase discrimination capability (e.g. resolution) and/or user recognition. Outputs of the graphic input device are supplied directly to a CPU of a data processing device between masking periods so that graphic manipulations such as dragging can be performed while masking unintended change of specified display location during selection and deselection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.