Picture-in-picture television receiver
US4729027A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 1987 |
| Grant date | Mar 1, 1988 |
| Priority date | — |
| Expiry date | Jan 5, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/45
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
According to the invention, there is provided a so-called picture-in-picture type television receiver in which a sub-picture screen is displayed within a main picture screen in a picture-in-picture fashion. When a picture based on a base band video signal from an external source such as a VTR, for example, is displayed on the sub-picture screen, if the sub-picture channel selecting means is then operated, the picture of a broadcast television channel is then automatically displayed on the sub-picture screen. This feature allows the omission of a video signal source switching means for the sub-picture, thus protecting the viewer from being confused when using the controls of the television receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.