Semiconductor optical logical device
US4626878A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1982 |
| Grant date | Dec 2, 1986 |
| Priority date | — |
| Expiry date | Dec 6, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F55/25
Abstract
A semiconductor optical logical device comprises two light-emitting elements (2a, 2b) formed on one main surface of a transparent substrate (1), and two light sensitive elements (3a, 3b) formed on the other main surface faced to the light emitting elements (2a, 2b), respectively. The two light sensitive elements (3a, 3b) are comprised of amorphous semiconductor and are electrically connected in series. On the other hand, the light-emitting elements (2a, 2b) are driven responsive to individual input signals, respectively. If and when two input signals are applied simultaneously, the two light-emitting elements (2a, 2b) emit light simultaneously, so that an output is obtained from the two light sensitive elements connected in series. If and when only one input signal is applied, no output is obtained. Thus, an optical logical product circuit is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.