Television remote control system for selectively controlling external apparatus through the AC power line
US4386436A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1981 |
| Grant date | May 31, 1983 |
| Priority date | — |
| Expiry date | Feb 27, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/72415
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A remote control system utilizes a portion of television receiver system to control an external appliance through the AC power supply line. The user enters an appliance control command into the keyboard of the television remote control unit. Inside the television receiver, the appliance control command is encoded and modulated onto a carrier signal which is transmitted on the AC power supply line. An external appliance control module, also connected to the AC power supply line, is located near the external appliance for detecting the encoded appliance control command and for selectively controlling the AC power supplied to the external appliance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.