JPS55102980A - Projection television unit - Google Patents

Projection television unit

Info

Publication number
JPS55102980A
JPS55102980A JP1024079A JP1024079A JPS55102980A JP S55102980 A JPS55102980 A JP S55102980A JP 1024079 A JP1024079 A JP 1024079A JP 1024079 A JP1024079 A JP 1024079A JP S55102980 A JPS55102980 A JP S55102980A
Authority
JP
Japan
Prior art keywords
sound
infrared
screen
rays
reflected
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1024079A
Other languages
Japanese (ja)
Inventor
Masahito Inoue
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP1024079A priority Critical patent/JPS55102980A/en
Publication of JPS55102980A publication Critical patent/JPS55102980A/en
Pending legal-status Critical Current

Links

Landscapes

  • Television Receiver Circuits (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

PURPOSE: To make it possible to hear easily a TV sound multiplex signal by reflecting infrared rays by a screen and then by receiving them by an infrared-ray sound receiver.
CONSTITUTION: A TV video signal is processed by video signal processing circuit 13 and applied to projection tube 14 and rays from projection tube 14 are reflected by reflex mirror 15 and then projected on screen 16 with directivity. Simultaneously, a TV sound multiplex signal is processed by sound signal processing circuit 17 and a processed sound signal is modulated by infrared-ray modulation circuit 18 and applied to projection tube 19 including a light source and optical system. Rays from projection tube 19 are also reflected by reflex mirror 15 and projected on screen 16. Reflected infrared rays are received by infrared-ray sound receiver 20 and heard via a headphone, etc. As a result, it is convenient because no wire is used and since reflected rays from the screen are received, a sound can be heard securely while there is no influence of the infrared-ray sound signal upon other places because of the directivity of the screen.
COPYRIGHT: (C)1980,JPO&Japio
JP1024079A 1979-01-30 1979-01-30 Projection television unit Pending JPS55102980A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1024079A JPS55102980A (en) 1979-01-30 1979-01-30 Projection television unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1024079A JPS55102980A (en) 1979-01-30 1979-01-30 Projection television unit

Publications (1)

Publication Number Publication Date
JPS55102980A true JPS55102980A (en) 1980-08-06

Family

ID=11744769

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1024079A Pending JPS55102980A (en) 1979-01-30 1979-01-30 Projection television unit

Country Status (1)

Country Link
JP (1) JPS55102980A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4941036A (en) * 1987-11-12 1990-07-10 Mitsubishi Denki Kabushiki Kaisha Command sensor in projection display apparatus
US7137710B2 (en) 2003-07-28 2006-11-21 Hewlett-Packard Development Company, L.P. Projection system
DE112004002945B4 (en) * 2004-09-07 2008-10-02 Hewlett-Packard Development Co., L.P., Houston projection machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4941036A (en) * 1987-11-12 1990-07-10 Mitsubishi Denki Kabushiki Kaisha Command sensor in projection display apparatus
US7137710B2 (en) 2003-07-28 2006-11-21 Hewlett-Packard Development Company, L.P. Projection system
GB2404809B (en) * 2003-07-28 2007-03-07 Hewlett Packard Development Co Projection system
DE112004002945B4 (en) * 2004-09-07 2008-10-02 Hewlett-Packard Development Co., L.P., Houston projection machine

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