发明名称 SIMPLE INTRODUCTION SYSTEM OF VIDEO PROJECTOR
摘要 PURPOSE:To eliminate nuisance sound to people, by projecting the video signal as video with video projector, radiating the audio signal with the transmitter in space as electromagnetic waves, and enabling the hearing only to desired people with the receiver and the ear-phone. CONSTITUTION:In the video projector in which audio can be listened only with the receiver, the signal generator V produces the video signal a and audio signal b, and the input selection switch S supplies the signal a to the video projector P and the signal b to the transmitter T. Further, the projector P projects the signal a as video, the transmitter T modulates the signal b and radiates it into space as electromagnetic waves. On the other hand, this is received with the receivers R1, R2 and demodulated into audio signal and heard individually with the ear-phone Re. Accordingly, while directly viewing the picture projected on the projector P, audio signal is listened only by people who desire, eliminating the nuisance sound to the other people.
申请公布号 JPS55115778(A) 申请公布日期 1980.09.05
申请号 JP19790022648 申请日期 1979.02.28
申请人 MICRON KIKI KK 发明人 TAKEHANA HIDEAKI
分类号 H04N7/18;H04N5/74;(IPC1-7):04N5/74 主分类号 H04N7/18
代理机构 代理人
主权项
地址