JPS57109481A - Transmission type video projector - Google Patents

Transmission type video projector

Info

Publication number
JPS57109481A
JPS57109481A JP55186209A JP18620980A JPS57109481A JP S57109481 A JPS57109481 A JP S57109481A JP 55186209 A JP55186209 A JP 55186209A JP 18620980 A JP18620980 A JP 18620980A JP S57109481 A JPS57109481 A JP S57109481A
Authority
JP
Japan
Prior art keywords
screen
light beam
video light
incident
mirror
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
JP55186209A
Other languages
Japanese (ja)
Inventor
Tsuyoshi Kondo
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP55186209A priority Critical patent/JPS57109481A/en
Publication of JPS57109481A publication Critical patent/JPS57109481A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
    • H04N5/7408—Direct viewing projectors, e.g. an image displayed on a video CRT or LCD display being projected on a screen

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Projection Apparatus (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

PURPOSE:To further shorten the size of a back space of a screen, by constituting so that a video light beam can be made incident diagonally onto a screen. CONSTITUTION:A video light beam emitted from a CRT11 is enlarged by a lens 12 and is made incident to a mirror 13. The mirror 13 reflects the incoming video light beam diagonally downward and makes it incident diagonally to a screen 14. On the screen 14, when the video light beam is made incident from the diagonal upper direction, this incident light beam is reflected by the lower surface side of each triangular prism element 14C, and vertically transmits through a screen body 14B. Accordingly, a diffusion spectrum distribution 14A in each point of the body 14B comes to have its directivity in front of the body 14B. In this way, when the video light beam is made incident diagonally onto the screen 14, size of the mirror 13 provided on the upper part of the back of the screen can be made small, by which depth size of the back of the screen of a cabinet can be made small.
JP55186209A 1980-12-26 1980-12-26 Transmission type video projector Pending JPS57109481A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55186209A JPS57109481A (en) 1980-12-26 1980-12-26 Transmission type video projector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55186209A JPS57109481A (en) 1980-12-26 1980-12-26 Transmission type video projector

Publications (1)

Publication Number Publication Date
JPS57109481A true JPS57109481A (en) 1982-07-07

Family

ID=16184272

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55186209A Pending JPS57109481A (en) 1980-12-26 1980-12-26 Transmission type video projector

Country Status (1)

Country Link
JP (1) JPS57109481A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60173533A (en) * 1984-02-20 1985-09-06 Mitsubishi Rayon Co Ltd Back projection screen
JPS62249134A (en) * 1986-04-22 1987-10-30 Mitsubishi Rayon Co Ltd Back projection screen
JPS62257140A (en) * 1986-04-30 1987-11-09 Mitsubishi Rayon Co Ltd Back projection screen
US5408282A (en) * 1992-06-01 1995-04-18 Pioneer Electronic Corporation Projection system for projection TV set
WO2005096073A1 (en) * 2004-04-02 2005-10-13 Kazunari Era Projection display and projection display system
JP2006011176A (en) * 2004-06-28 2006-01-12 Tohoku Univ Screen for rear projection display
JP2006313187A (en) * 2005-05-06 2006-11-16 Seiko Epson Corp Screen and picture display device
JP2020148950A (en) * 2019-03-14 2020-09-17 コニカミノルタ株式会社 Head-up display device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60173533A (en) * 1984-02-20 1985-09-06 Mitsubishi Rayon Co Ltd Back projection screen
JPS62249134A (en) * 1986-04-22 1987-10-30 Mitsubishi Rayon Co Ltd Back projection screen
JPS62257140A (en) * 1986-04-30 1987-11-09 Mitsubishi Rayon Co Ltd Back projection screen
US5408282A (en) * 1992-06-01 1995-04-18 Pioneer Electronic Corporation Projection system for projection TV set
WO2005096073A1 (en) * 2004-04-02 2005-10-13 Kazunari Era Projection display and projection display system
CN100412613C (en) * 2004-04-02 2008-08-20 江良一成 Projection display and projection display system
US7488076B2 (en) 2004-04-02 2009-02-10 Kazunari Era Projection display device and projection display system
JP2006011176A (en) * 2004-06-28 2006-01-12 Tohoku Univ Screen for rear projection display
JP2006313187A (en) * 2005-05-06 2006-11-16 Seiko Epson Corp Screen and picture display device
JP2020148950A (en) * 2019-03-14 2020-09-17 コニカミノルタ株式会社 Head-up display device

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