Multi-level television receiver channel indicia display
US3945003A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1974 |
| Grant date | Mar 16, 1976 |
| Priority date | — |
| Expiry date | Apr 23, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J1/045
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A channel number display device for a television receiver for displaying the numerals of the channel to which the receiver is tuned with the display being initially bright immediately after a channel change, and then after a predetermined time of several seconds, being reduced in brightness so as not to distract from the program material. Through the use of a thyristor, regardless of the number of individual elements in the numerical display, the brightness levels may be held to predetermined quantities. PAC BACKGROUND OF THE INVENTION Over the years, it has been a desire of television manufacturers to provide a display of the channel numbers on the television receiver so that they can be easily read, especially immediately after tuning to a new station so that the viewer can determine if he is at the desired station. This is especially true for television receivers having remote control, wherein the viewer is spaced at the viewing distance from the receiver while tuning to a new station. Various efforts to accomplish this display in the past have been largely unsuccessful due to cost or inefficient displays. While it has been a goal to initially illuminate the channel number displ…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.