Optical tablet construction
US4936683A · kind A · utility
30Cited by
8References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 22, 1989 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | Jun 22, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0421
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical digitizer or tablet employing a linear image sensor behind a microlouver strip and extending along a coordinate axis of a coordinate axes plane. In one embodiment, a non-directional light source floods the plane, and a cursor is provided with a reflector that reflects incident light. In another embodiment, the light source is on the reflector, and the sensor-microlouver combination is located along each tablet edge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.