Touch apparatus with separated compartments
US8872801B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2011 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Dec 14, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0421
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A touch-sensitive apparatus for determining a location of at least one object on a touch surface. The touch-sensitive apparatus extends in a direction of depth and comprises a light transmissive panel, a display arranged behind the light transmissive panel, and a first compartment and second compartment arranged behind the display. Light from a light emitter arrangement in the first compartment is introduced into the light transmissive panel for propagation by internal reflection. The light is thereafter coupled out to be received by a light detection arrangement in the second compartment. The first and second compartments are separated, such that light from the light emitter arrangement is prevented from reaching the light detection arrangement without first having propagated in the light transmissive panel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.