Television channel selection apparatus employing multi-picture display
US4855833A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1987 |
| Grant date | Aug 8, 1989 |
| Priority date | — |
| Expiry date | Nov 4, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/482
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for selecting one of a number of television channels is operable to be set in a mode whereby an array of miniature pictures corresponding to the respective channels is displayed, with each channel being sequentially selected for a predetermined interval during which image data for the selected channel are repetitively written into one of a set of regions (42 to 50) of a one-field memory, with the entire memory contents being continuously and repetitively read out, whereby the picture for the selected channel appears as a moving picture while those of the other channels are static. The apparatus can then be set in a normal operating mode, with the channel selected at the time of mode changeover being thereafter held fixedly selected and a normal display picture produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.