Image reading device with different reflectivity coefficients in a transparent layer and a substrate
US5101099A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1990 |
| Grant date | Mar 31, 1992 |
| Priority date | — |
| Expiry date | Oct 9, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F55/255
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image reading device in which light receiving elements formed on a first substrate are disposed in opposition to light emitting elements formed on a second substrate with a transparent layer being interposed therebetween. The transparent layer is made of a material whose reflectivity is smaller than that of the second substrate. In another embodiment, gas layers are provided between the transparent layer and the light emitting elements and the gas therein has an index of refraction less than the second substrate. Light transmitting windows provided in an opaque electrode of the light emitting elements have peripheral portions where no light is emitted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.