Monitoring apparatus for television
US8624979B1 · kind B1 · utility
Assignees
Inventor
Key dates
| Filing date | Jul 11, 2013 |
| Grant date | Jan 7, 2014 |
| Priority date | — |
| Expiry date | Jul 11, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N17/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A monitoring apparatus includes a detection circuit, a filter circuit, an amplifying circuit, a regulation circuit, a delay and charging circuit, and a driving circuit. The detection circuit receives a video signal, and performs an operation to obtain an image signal from the video signal. The filter circuit obtains an average intensity of a luminance signal corresponding to the image signal. The delay and charging circuit charges an input capacitor when receiving a low level regulated signal from the amplifying circuit. The driving circuit activates an alarm when a charging voltage of the chargeable capacitor exceeds a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.