Coordinate input device
Abstract
Abstract A coordinate input device is provided of the type comprising main loops made of conductors embedded parallelly in an input plane, a compensating loop disposed in the vicinity of the common wire of the main loops, switching elements for successively sending out a scanning signal to the individual main loops, a switching element for sending out a current to the compensating loop, a current drive circuit pertinent to the main loops, and a current drive circuit pertinent to the compensating loop, wherein a position is obtained on the basis of signals detected by a coordinate designating means capable of pointing out any spot on the input plane, which is characterized in that the output side of the main loops is connected with the input side of the compensating loop, whereby the total consumption power is not increased even by addition of the compensating loop.
Inventors
- 👤 Kiyoshi Kimura
Bibliographic Details
Claims Analysis
Total Claims: 5References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-30 | 1991-06-01 | 1991-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-30 | 1995-06-01 | 1995-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-30 | 1999-06-01 | 1999-12-01 | $7700.00 | Window Closed / Lapsed |