Indication control circuit for indicating workload of electronic device
US8981956B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2013 |
| Grant date | Mar 17, 2015 |
| Priority date | — |
| Expiry date | Jul 17, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/382
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A workload indicating control circuit includes a coupling circuit, a square wave signal producing circuit, and an integral circuit. The coupling circuit induces a current output by a power input circuit of an electronic device and produces a proportional induced voltage, the current output by the power input circuit being proportional to the workload of the electronic device. The square wave signal producing circuit converts the induced voltage from the coupling circuit into a square wave voltage with corresponding amplitude. The integral circuit takes the square wave signal and modulates the square wave voltage into a sawtooth voltage, to drive the light-emitting unit to emit light according to the sawtooth voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.