Movable touchpad with high sensitivity
US8125449B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2009 |
| Grant date | Feb 28, 2012 |
| Priority date | — |
| Expiry date | Oct 26, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0428
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A highly sensitive movable touchpad is disclosed in the present invention. It is used for laptop computers and has a slidable template for users to move so that a cursor can be controlled by the touchpad. A resistive or capacitive detecting surface can be applied for detecting users' click, double click, drag, or scroll motion on any point of the surface. Additionally, there is an optical displacement sensor provided under the slidable template for detecting surface information on the back surface of the slidable template. A sequence of images of surface movement are processed by an image processing unit. Then, relative movement information is calculated and sent to an operating system in the computer. The operating system controls the cursor with the relative movement information. The present invention uses edge detectors for dynamically controlling the cursor and calibrating location of the cursor so that positioning of the touchpad is synchronous with the cursor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.