Light emitting element, image sensor and light receiving element with linearly varying waveguide index
US5124543A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Aug 8, 1990 |
| Grant date | Jun 23, 1992 |
| Priority date | — |
| Expiry date | Aug 8, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B33/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical device includes a substrate, an optical waveguide provided on a surface of the substrate, and an electroluminescence element including a first electrode layer, a first insulator layer, a light emitting layer for emitting light, a second insulator layer and a second electrode layer which are successively stacked. The light emitted from the light emitting layer is emitted from an end surface of the optical waveguide. The optical waveguide has a refractive index which increases from an outer periphery to a center portion of a cross section which is approximately parallel to the end surface, and the electroluminescence element is provided within the optical waveguide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.