JPS56165134A - Transmission type screen - Google Patents

Transmission type screen

Info

Publication number
JPS56165134A
JPS56165134A JP6934480A JP6934480A JPS56165134A JP S56165134 A JPS56165134 A JP S56165134A JP 6934480 A JP6934480 A JP 6934480A JP 6934480 A JP6934480 A JP 6934480A JP S56165134 A JPS56165134 A JP S56165134A
Authority
JP
Japan
Prior art keywords
center
circular arc
screen
lens
proportion
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
JP6934480A
Other languages
Japanese (ja)
Inventor
Akira Izawa
Fumio Takagi
Taiji Ishii
Masaki Tsukada
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.)
Dai Nippon Printing Co Ltd
Original Assignee
Dai Nippon Printing 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 Dai Nippon Printing Co Ltd filed Critical Dai Nippon Printing Co Ltd
Priority to JP6934480A priority Critical patent/JPS56165134A/en
Publication of JPS56165134A publication Critical patent/JPS56165134A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/62—Translucent screens
    • G03B21/625—Lenticular translucent screens

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Abstract

PURPOSE:To improve uniformly of brightness at the center and on the periphery of a picture by changing gradually the form of the lens surface of a lenticular screen from the center toward the left and right edges. CONSTITUTION:A form of a sectional contour of the surface of a lenticular lens a0 at a center of a screen is a circular arc and in proportion to a distance from the center one part of the circular arc in the side approached to the center of each lens a1, a2, an has a form cut down gradually and largely to a direction parpendicular to the screen surface. A radius of each lenticular lens is do well either to be the same or to be changed. Although a light concentrates to the center in proportion to a quantity of ones cut down, the diffusibility being reduced and a scope of an observation being narrowed. To prevent the situation, at the top part of the left and right sides a circular arc over at least 1/2 of the central circular arc is necessary.
JP6934480A 1980-05-23 1980-05-23 Transmission type screen Pending JPS56165134A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6934480A JPS56165134A (en) 1980-05-23 1980-05-23 Transmission type screen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6934480A JPS56165134A (en) 1980-05-23 1980-05-23 Transmission type screen

Publications (1)

Publication Number Publication Date
JPS56165134A true JPS56165134A (en) 1981-12-18

Family

ID=13399827

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6934480A Pending JPS56165134A (en) 1980-05-23 1980-05-23 Transmission type screen

Country Status (1)

Country Link
JP (1) JPS56165134A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5865427A (en) * 1981-10-14 1983-04-19 Matsushita Electric Ind Co Ltd Screen
JPH02171825A (en) * 1988-12-23 1990-07-03 Yokogawa Medical Syst Ltd Screen switching device
JPH08254757A (en) * 1996-04-22 1996-10-01 Hitachi Ltd Transmission type screen
JP2003029344A (en) * 2001-07-13 2003-01-29 Arisawa Mfg Co Ltd Screen
KR100613840B1 (en) 2005-08-29 2006-08-17 주식회사 엘지에스 Lenticular lens and 3d display having the same
US7568820B2 (en) 2005-10-14 2009-08-04 Dai Nippon Printing Co., Ltd. Light-controlling sheet and surface illuminant unit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5136932B2 (en) * 1973-07-02 1976-10-13
JPS5382329A (en) * 1976-12-23 1978-07-20 Polaroid Corp Back projection type screen and projector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5136932B2 (en) * 1973-07-02 1976-10-13
JPS5382329A (en) * 1976-12-23 1978-07-20 Polaroid Corp Back projection type screen and projector

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5865427A (en) * 1981-10-14 1983-04-19 Matsushita Electric Ind Co Ltd Screen
JPH02171825A (en) * 1988-12-23 1990-07-03 Yokogawa Medical Syst Ltd Screen switching device
JPH08254757A (en) * 1996-04-22 1996-10-01 Hitachi Ltd Transmission type screen
JP2003029344A (en) * 2001-07-13 2003-01-29 Arisawa Mfg Co Ltd Screen
KR100613840B1 (en) 2005-08-29 2006-08-17 주식회사 엘지에스 Lenticular lens and 3d display having the same
US7568820B2 (en) 2005-10-14 2009-08-04 Dai Nippon Printing Co., Ltd. Light-controlling sheet and surface illuminant unit

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