Title:
INFRARED RAY TRANSMISSION AND RECEPTION SYSTEM
Document Type and Number:
Japanese Patent JPH05327623
Kind Code:
A
Abstract:
PURPOSE: To provide a infrared ray transmission reception system in which no beat interference takes place.
CONSTITUTION: In the system in which a voice signal is sent from a transmission unit (microphone 10) to a relay unit in terms of an infrared ray signal and the relay unit applies the infrared ray signal to the reception unit (headphone 40), a light interrupt means (33d) is provided to one or both of a light receiving means 21 and a light emitting means 33 in the relay unit or the directivity of them is controlled to prevent the input of an infrared ray output from the light emitting means 33 to the light receiving means 21.
Inventors:
MIURA MASAMI
FUNABASHI YOKO
FUNABASHI YOKO
Application Number:
JP15619192A
Publication Date:
December 10, 1993
Filing Date:
May 25, 1992
Export Citation:
Assignee:
SONY CORP
International Classes:
G02B26/08; H04B10/11; H04B10/114; H04B10/548; H04R1/10; (IPC1-7): H04B10/10; G02B26/08; H04B10/22; H04R1/10
Attorney, Agent or Firm:
Akio Waki