Light emitting display device having light receiving element for receiving light from light emitting element and self-holding and optical passage for guiding drive light to the light receiving element
US5546496A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1995 |
| Grant date | Aug 13, 1996 |
| Priority date | — |
| Expiry date | Apr 7, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/3512
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
There is provided an inexpensive light emitting display device which has a simple wiring structure and produces a bright screen display. A photo-transistor is connected in series with a light emitting diode. The photo-transistor is arranged so that light emitted from the light emitting diode enters into the photo-transistor. There is provided an optical guide for guiding a data signal light to the photo-transistor and an optical guide for guiding a scanning signal light to the phototransistor. Further, an optical control section has a laser diode array, a lens array, and a deflection mirror. The above-mentioned arrangement obviates the need of an electric wiring for a data signal and a scanning signal, and is able to turn on the photo-transistor with the emission light from the light emitting diode and makes the photo-transistor self-hold its conductive state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.