Coordinate input device and method for manufacturing same
US5530209A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1994 |
| Grant date | Jun 25, 1996 |
| Priority date | — |
| Expiry date | Oct 18, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/045
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A coordinate input device including a flexible upper substrate mounted on a rigid lower substrate and having a centrally-located input operating portion. The upper substrate includes a first resistance layer laminated thereon and X-axis electrodes formed on the first resistance layer on opposite sides of the input operating portion. The lower substrate includes a second resistance layer laminated thereon and Y-axis electrodes formed on the second resistance layer on opposite sides of the input operating portion. A spacer group is mounted between the upper and lower substrates to maintain a predetermined clearance, with spacers of the spacer group being having a height of 4 .mu.m or less, and being arranged at a pitch in the range of 0.3 to 1.0 mm. A position detecting circuit is provided for locating a depressed portion of the upper substrate by measuring a change in voltage caused by contact between the first and second resistance layers. A method is also provided for making the coordinate input device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.