Image scanner and display apparatus
US5929845A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1996 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Sep 3, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K59/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Image scanner and display apparatus including an array of organic electroluminescent devices, each device operating as a light emitter when forward biased and as a light detector when reverse biased. Electronics coupled to the array and having a display mode and a scanner mode, the electronics sequentially forward biasing the array of organic electroluminescent devices, one row at a time, to emit light in the display mode, and sequentially forward biasing alternate columns of devices to emit light, one column at a time, and reverse biasing an associated column of devices for detecting light in the scanning mode, whereby light emitted from a forward biased column and reflected by information being scanned is received by the reverse biased associated column.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.