Electronic whiteboard and penholder used for the same
US6654008B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2001 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Feb 17, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0428
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An electronic whiteboard capable of being drawn by using marker pens of several colors and one penholder, and a penholder for use in such an electronic whiteboard are disclosed. In a penholder for mounting marker pens, an infrared light emitting unit emits infrared light containing color information of the marker pen, an ultrasonic wave emitting unit emits a the ultrasonic wave, and color information changeover means changes over color information depending on the color of marker pen. The electronic whiteboard main body receives the infrared light and ultrasonic wave emitted from the penholder, and issues information about a position of the penholder depending on the reception timing of the infrared light and ultrasonic wave.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.