Circuit control devices utilizing electronic display screen light
US6326956A · kind A · utility
91Cited by
9References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1998 |
| Grant date | Dec 4, 2001 |
| Priority date | — |
| Expiry date | Aug 24, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/94063
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A control device provides a variable control signal to electrical apparatus and has a control member, such as a stylus or a turnable or slidable member, that is manipulated to vary the signal. Photoelectric sensors detect and track movement of the control member. The control member is disposed at the face of an electronic image display screen which can display calibration marks, identifying labels, current setting and/or other graphics pertinent to operation of the control device. The display screen also operates as the light source for the photoelectric sensors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.