Determining stylus location relative to projected whiteboard using secondary IR emitter on stylus
US10275047B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2016 |
| Grant date | Apr 30, 2019 |
| Priority date | — |
| Expiry date | Apr 1, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H11/245
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In one aspect, a device includes a processor, an infrared (IR) detector accessible to the processor and that receives signals from a primary IR emitter on a hand-held device and a secondary IR emitter on the hand-held device, a projector accessible to the processor, a transceiver accessible to the processor, and storage accessible to the processor. The storage bears instructions executable by the processor to use a location of the secondary IR emitter as sensed by the IR detector and orientation data of the hand-held device received from the transceiver to extrapolate a handwriting projection reference. The instructions are also executable to use the handwriting projection reference to project handwriting onto a projected whiteboard.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.