Sound and light control apparatus
US8213639B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Dec 30, 2009 |
| Grant date | Jul 3, 2012 |
| Priority date | — |
| Expiry date | Oct 9, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R27/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sound and light control apparatus includes an audio signal input terminal for receiving an audio signal, a voltage dividing circuit electrically connected to the audio signal input terminal for dividing the voltage of the audio signal into two divided voltages, a control knob electrically connected to the voltage dividing circuit for adjusting the divided voltages, at least one audio signal output terminal electrically connected to the voltage dividing circuit and at least one loudspeaker for transmitting one divided voltage to the loudspeaker, a frequency-divider crossover circuit electrically connected to the voltage dividing circuit for filtering the other divided voltage according to a plurality of different audio frequencies to generate corresponding frequency division voltages, and transmitting each frequency division voltage to a corresponding frequency division voltage output terminal electrically connected to a light emitting diode and enabling the light emitting diode to produce light corresponding to the frequency division voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.