JPS55151744A - Projection image displayer - Google Patents

Projection image displayer

Info

Publication number
JPS55151744A
JPS55151744A JP6021179A JP6021179A JPS55151744A JP S55151744 A JPS55151744 A JP S55151744A JP 6021179 A JP6021179 A JP 6021179A JP 6021179 A JP6021179 A JP 6021179A JP S55151744 A JPS55151744 A JP S55151744A
Authority
JP
Japan
Prior art keywords
projection
screen
projection screen
focus
picture light
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.)
Granted
Application number
JP6021179A
Other languages
Japanese (ja)
Other versions
JPS6321304B2 (en
Inventor
Arinobu Suzuki
Nozomi Arimoto
Toshinobu Inoue
Masayuki Sekida
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 Electronics Corp
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 Electronics Corp filed Critical Matsushita Electronics Corp
Priority to JP6021179A priority Critical patent/JPS55151744A/en
Publication of JPS55151744A publication Critical patent/JPS55151744A/en
Publication of JPS6321304B2 publication Critical patent/JPS6321304B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/89—Optical or photographic arrangements structurally combined or co-operating with the vessel
    • H01J29/894—Arrangements combined with the vessel for the purpose of image projection on a screen

Abstract

PURPOSE:To obtain projection images of a high definition by letting the focusing face of image formed on a fluorescent screen coincide with the curved surface of projection screen. CONSTITUTION:The difference d between the curved surface of a projection screen and the focus of picture light is obtained at each point on the projection screen and the points on a fluorescent screen, corresponding to the points on the projection screen, are made uneven as much as d'=d/M2 (where M is the scale factor of projection), larger than the spherical surface R. In short, when d>O, the focus of picture light is on cathode-ray tube rather than the projection screen and the fluorescent screen structure becomes convex. Also, when d<O, the focus point of the picture light is located at a position on the opposite side of the cathode-ray tube begond the projection screen and therefore the fluorescent screen structure becomes concave.
JP6021179A 1979-05-16 1979-05-16 Projection image displayer Granted JPS55151744A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6021179A JPS55151744A (en) 1979-05-16 1979-05-16 Projection image displayer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6021179A JPS55151744A (en) 1979-05-16 1979-05-16 Projection image displayer

Publications (2)

Publication Number Publication Date
JPS55151744A true JPS55151744A (en) 1980-11-26
JPS6321304B2 JPS6321304B2 (en) 1988-05-06

Family

ID=13135583

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6021179A Granted JPS55151744A (en) 1979-05-16 1979-05-16 Projection image displayer

Country Status (1)

Country Link
JP (1) JPS55151744A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002159339A (en) * 2000-11-24 2002-06-04 Leben Co Ltd Roll paper cleaning utensil for attached grease- removing paper and cleaning paper

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002159339A (en) * 2000-11-24 2002-06-04 Leben Co Ltd Roll paper cleaning utensil for attached grease- removing paper and cleaning paper

Also Published As

Publication number Publication date
JPS6321304B2 (en) 1988-05-06

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