Photoelectric joystick
US4250378A · kind A · utility
21Cited by
6References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 6, 1978 |
| Grant date | Feb 10, 1981 |
| Priority date | — |
| Expiry date | Oct 6, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05G2009/04759
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A device and method for producing a digital signal representative of the position of a moveable control stick relative to one or more reference planes. The device includes means for detecting the location of a shadow cast by a portion of the control stick extending between one or more light-emitting elements and one or more light-sensitive elements, and means for generating a digital signal representative of the detected location. With the light-emitting or light-sensitive elements oriented in a planar array, the signal thus generated is representative of the position of the control stick relative to the plane of the array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.