Contact type image sensor having an organic type thin film light emitting element
US5105238A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1990 |
| Grant date | Apr 14, 1992 |
| Priority date | — |
| Expiry date | Sep 28, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/0313
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A contact type image sensor is disclosed, wherein an illumination source having a thin film light emitting element is opposed to a sensor section having thin film photo sensitive elements, a transparent substrate being disposed therebetween. The thin film light emitting element is so-called an organic thin film EL element, which comprises an anode, a hole transport thin film, an electron transport organic fluorescent thin film, and a cathode. Since the organic thin film EL element can be driven at a low DC voltage, it decrease the fluctuation of the intensity of the illumination light, resulting in remarkably imprving the reading accuracy of an image. In addition, the thin film light emitting element can be operated with a small amount of power. Moreover, it can be thinly structured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.