Remote coordinate designating device
US5949403A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1995 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | Nov 29, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J2200/22
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A remote coordinate designating device has a remote control with a light emitting device for emitting light, and a controller for detecting a designated position by receiving light from the remote control at a distance from the remote control. One cycle of a light signal from the light emitting device is composed of switch data and a coordinate detection timing header at the head, and a coordinate detection carrier. The switch data and the coordinate detection timing header use the same frequency as the normal remote control frequency band, and the frequency of the coordinate detection carrier is lower than the frequency of the switch data and the coordinate detection timing header. The switch data contains on-off information about a switch for pointing, and coordinate detection is started when a predetermined time has passed from the rise of a burst portion in the switch data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.