JPS56158328A - Transmission type screen - Google Patents

Transmission type screen

Info

Publication number
JPS56158328A
JPS56158328A JP4639280A JP4639280A JPS56158328A JP S56158328 A JPS56158328 A JP S56158328A JP 4639280 A JP4639280 A JP 4639280A JP 4639280 A JP4639280 A JP 4639280A JP S56158328 A JPS56158328 A JP S56158328A
Authority
JP
Japan
Prior art keywords
projection length
pitch
screen
lens
transmission type
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
JP4639280A
Other languages
Japanese (ja)
Inventor
Yasutomo Funakoshi
Tamotsu Wakahata
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 JP4639280A priority Critical patent/JPS56158328A/en
Priority to US06/251,903 priority patent/US4379617A/en
Priority to DE8181301520T priority patent/DE3162926D1/en
Priority to AU69134/81A priority patent/AU523917B2/en
Priority to CA000374881A priority patent/CA1158898A/en
Priority to EP81301520A priority patent/EP0037739B1/en
Publication of JPS56158328A publication Critical patent/JPS56158328A/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

Landscapes

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

Abstract

PURPOSE:To increase the directive property of a screen, by forming the section form of the pitch of a lenticular lens with a linear part and a circular part and setting the projection length of the linear part at <=about 1/3 the projection length of a pitch. CONSTITUTION:A lenticular metal mold in which the projection length (pitch) 6 of an element of a lenticular lens has a linear part 7 and a circular part 8 is provided on a surface of a brass plate 5. In this case, if the projection length of the part 7 exceeds about 1/3 of a projection length (pitch) of the lens 1 in terms of a comparison with the conventional directive property, the luminance gain is reduced at the center of a screen with an increase of luminance of the screen secured at the visual angle positions excepting the screen center. In this connection, a sudden change of contrast can be avoided at the image viewing position if the projection length of the part 7 is set at <=1/3 the projection length (pitch) of an element of the lens 1 for a transmission type screen.
JP4639280A 1980-04-08 1980-04-08 Transmission type screen Pending JPS56158328A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP4639280A JPS56158328A (en) 1980-04-08 1980-04-08 Transmission type screen
US06/251,903 US4379617A (en) 1980-04-08 1981-04-07 Rear projection screen for a color television projector
DE8181301520T DE3162926D1 (en) 1980-04-08 1981-04-07 Light-transmitting type screen for a color television projector
AU69134/81A AU523917B2 (en) 1980-04-08 1981-04-07 Rear projection screen for a colour television projector
CA000374881A CA1158898A (en) 1980-04-08 1981-04-07 Rear projection screen for a color television projector
EP81301520A EP0037739B1 (en) 1980-04-08 1981-04-07 Light-transmitting type screen for a color television projector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4639280A JPS56158328A (en) 1980-04-08 1980-04-08 Transmission type screen

Publications (1)

Publication Number Publication Date
JPS56158328A true JPS56158328A (en) 1981-12-07

Family

ID=12745867

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4639280A Pending JPS56158328A (en) 1980-04-08 1980-04-08 Transmission type screen

Country Status (1)

Country Link
JP (1) JPS56158328A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58198035A (en) * 1982-05-14 1983-11-17 Mitsubishi Rayon Co Ltd Screen of back projection

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4877830A (en) * 1971-12-15 1973-10-19
FR2276605A1 (en) * 1974-06-28 1976-01-23 Bachelot Andre Double sided optical projection surface - improved image contrast transfer and improved luminous transfer efficiency

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4877830A (en) * 1971-12-15 1973-10-19
FR2276605A1 (en) * 1974-06-28 1976-01-23 Bachelot Andre Double sided optical projection surface - improved image contrast transfer and improved luminous transfer efficiency

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58198035A (en) * 1982-05-14 1983-11-17 Mitsubishi Rayon Co Ltd Screen of back projection
JPH0261727B2 (en) * 1982-05-14 1990-12-20 Mitsubishi Rayon Co

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