Television pick-up device suitable for a discontinuous recording of information during continuous operation
US4233633A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1978 |
| Grant date | Nov 11, 1980 |
| Priority date | — |
| Expiry date | Dec 22, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/41
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A television pick-up device suitable for a discontinuous recording of information during continuous operation, such as, for example, in X-ray television. When information recording is interrupted at a continuing field scanning of a target plate in the pick-up tube, the cathode thereof is supplied from a supply circuit with a higher voltage than during the field scanning during information recording. As a result thereof a negative charging of the free surface of the target plate by the more rapid electrons in the electron beam is prevented, so that at the next recording of information the picture quality on display is not poorer due to signal clipping.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.