Determination of pen location on display apparatus using piezoelectric point elements
US5657054A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1995 |
| Grant date | Aug 12, 1997 |
| Priority date | — |
| Expiry date | Apr 26, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0436
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A stylus location system comprises a field emission device having an anode plate 32 and an emitter plate 2, and a plurality of piezoelectric point elements 34, 42 coupled to the anode plate. The piezoelectric point elements 34, 42 are capable of transforming electrical energy into ultrasonic energy and transforming ultrasonic energy into electrical energy. A stylus 30 is also coupled to the anode plate 32 and circuitry 36, 46, 48 is coupled to the piezoelectric point elements 42 for determining the position of the stylus 30. The circuitry 36 may also send a video data signal to the emitter plate 2 in response to the position determination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.