Passive data display and method and means for control and monitoring thereof
US4420748A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 1980 |
| Grant date | Dec 13, 1983 |
| Priority date | — |
| Expiry date | Dec 16, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13306
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In the disclosed display, the symbol segments of a passive cell, such as a liquid crystal cell, are each connected to one of two leads through an elastic connector layer having mutually insulated conductors running through the layer transverse thereto. According to an embodiment of the invention, the leads are on a printed circuit board and a control bus connects one of the leads to a control unit that operates the cell and a second bus connects the other of each of the leads to a monitor unit that compares the potential at each segment with the potential at the control unit. This checks the connections between the control unit and each segment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.