Digital computer writing board
US4833279A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1987 |
| Grant date | May 23, 1989 |
| Priority date | — |
| Expiry date | Oct 21, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A digital computer writing board making use of the piezoelectric characteristics by means of a soft piezoelectric film material to convert a physical pressure into an electrical signal, which is utilized to form fine electric polar lines of high resolution to be arranged into an upper layer and a lower layer quadraturally for sub-group encoding, then for reading out the positions of various signals which will be detected by a detection circuits and stored into a memory for processing by a computer and for displaying on the corresponding positions on the screen. The digital computer writing board is capable of having a common writing instrument (such as a pencil, ball pen . . . etc.) directly writing or drawing and having those character tracings or graphic patterns thus left to be processed digitally for storage in a memory for further processing, display, identification within the computer terminal or for the transmission as an electronic document and printing out, with a view to providing a solution to such problems as one in which a hand writing of characters or graphs is insusceptibly connected within an interface of the computer or communication link. This has been a revolutio…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.