JPS5646376A - Projection type display - Google Patents

Projection type display

Info

Publication number
JPS5646376A
JPS5646376A JP12065779A JP12065779A JPS5646376A JP S5646376 A JPS5646376 A JP S5646376A JP 12065779 A JP12065779 A JP 12065779A JP 12065779 A JP12065779 A JP 12065779A JP S5646376 A JPS5646376 A JP S5646376A
Authority
JP
Japan
Prior art keywords
lenses
projective
taken
constitution
aperture
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
JP12065779A
Other languages
Japanese (ja)
Inventor
Masanori Ogino
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP12065779A priority Critical patent/JPS5646376A/en
Publication of JPS5646376A publication Critical patent/JPS5646376A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

PURPOSE:To increase the factor of light collection without increasing the angle of concentration, by taking the shape of the projective lens such that it is shorter toward the arrangement of video developing device such as picture tube and longer toward the vertical direction to the arrangement direction. CONSTITUTION:The optical system of color TV receiver is constituted by locating the mono-color picture tubes 1R, 1G and 1B having fluorescent substance of red, green and blue, screen 2 and projective lenses 3R, 3G and 3B. The width of the projective lenses 3R', 3G', and 3B' for the optical system with the constitution like this is taken equal as the aperture of the conventional circular projection lenses 3R, 3G and 3B, and the height is taken twice the aperture, and such rectangular lenses are located at the position of the projection lenses 3R, 3G and 3B. Further, the area of the projective lenses 3R', 3G' and 3B' is taken as 8/pi times the projective lenses 3R, 3G, and 3B to increase the light collection factor without increasing the collection angle.
JP12065779A 1979-09-21 1979-09-21 Projection type display Pending JPS5646376A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12065779A JPS5646376A (en) 1979-09-21 1979-09-21 Projection type display

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12065779A JPS5646376A (en) 1979-09-21 1979-09-21 Projection type display

Publications (1)

Publication Number Publication Date
JPS5646376A true JPS5646376A (en) 1981-04-27

Family

ID=14791653

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12065779A Pending JPS5646376A (en) 1979-09-21 1979-09-21 Projection type display

Country Status (1)

Country Link
JP (1) JPS5646376A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6094583A (en) * 1983-10-28 1985-05-27 Konishiroku Photo Ind Co Ltd Optical system for television projector
JPS62271994A (en) * 1986-05-21 1987-11-26 Matsushita Seiko Co Ltd Blower

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6094583A (en) * 1983-10-28 1985-05-27 Konishiroku Photo Ind Co Ltd Optical system for television projector
JPS62271994A (en) * 1986-05-21 1987-11-26 Matsushita Seiko Co Ltd Blower

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