Infrared emitter
US6931136B2 · kind B2 · utility
2Cited by
0References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 3, 2003 |
| Grant date | Aug 16, 2005 |
| Priority date | — |
| Expiry date | Feb 11, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2420/07
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An infrared emitter comprises a preamplifier, an infrared RF emitter, an infrared channel controller and a photodiode emitting-medium. With the emitter, by switching between two channels with an infrared channel controller, and by the mode of arrangement of a plurality of infrared emitting diodes and two Darlington amplifying circuits on the parts in a photodiode emitting-medium, crosstalk disturbance during transmitting carrier waves to a wireless earphone is inhibited. The emitter is applied to industries of audio/video playing, car audio/video equipment and hi-fi equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.