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WO2004051364A2 - Ecran de projection frontale - Google Patents

Ecran de projection frontale Download PDF

Info

Publication number
WO2004051364A2
WO2004051364A2 PCT/ZA2003/000164 ZA0300164W WO2004051364A2 WO 2004051364 A2 WO2004051364 A2 WO 2004051364A2 ZA 0300164 W ZA0300164 W ZA 0300164W WO 2004051364 A2 WO2004051364 A2 WO 2004051364A2
Authority
WO
WIPO (PCT)
Prior art keywords
projection screen
screen according
image
screen
transparent
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.)
Ceased
Application number
PCT/ZA2003/000164
Other languages
English (en)
Other versions
WO2004051364A3 (fr
Inventor
Patrick Normand Argall
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AU2003302535A priority Critical patent/AU2003302535A1/en
Publication of WO2004051364A2 publication Critical patent/WO2004051364A2/fr
Publication of WO2004051364A3 publication Critical patent/WO2004051364A3/fr
Anticipated expiration legal-status Critical
Ceased 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

Definitions

  • This invention relates to a projection screen, onto which an image is projected from the same side as that from which it is viewed.
  • Hot spotting Where the image is brighter in a spot in the centre this becomes progressively worse as the gain (reflective properties) increases.
  • Hot spotting (the reduced brightness / reflected lights drop off as the angle of incidence decreases towards the outer edges) this is not noticeable.
  • the screen material is flat or of uniform curvature, thus Ripples, Creases and the like have been prevented.
  • Brightness The entire screen surface is utilised to convert all of the limited light emitted by the projector in to a uniform, bright and lifelike image.
  • a projection screen for front projection with a focal error (the screen produces an image slightly out of focus to reduce the resolution in order to mask the pixilation and produce a smooth realistic image) comprising:
  • the layer of transparent material may be between the layer of translucent material and the reflective surface
  • the reflective surface is metallic
  • the transparent layer is glass
  • the translucent layer is a urethane
  • the reflective surface may be achieved by a metallised film, reflective paint, metal plated, reduced metal oxide or vapour deposited on to the surface
  • the transparent layer may be provided by applying a transparent film, such as urethane or acrylic to the reflective surface
  • the translucent layer may be provided by applying a translucent layer, such as film to the reflective surface or matting a film of silicon oxide, chemically or by abrading the surface.
  • the front projection screen comprises a flexible substrate in the case of a roll up screen or a rigid substrate in the case of a rigid screen, onto which the reflective surface is applied and the transparent layer is provided on the opposite side of the reflective surface to the substrate, the translucent layer is provided on the opposite side of the transparent layer to the reflective surface.
  • the accompanying drawing is a diagrammatic cross-sectional view through a flat front projection screen according to the invention.
  • a transparent layer 13 Adjacent to this surface is a transparent layer 13; alternatively a laminated or cast transparent layer is applied to the reflective surface.
  • a translucent layer 14 Adjacent to this surface is a translucent layer 14, alternatively a laminated translucent film is applied to the transparent surface, and other layers may clearly be added to the composition of the screen and or elements embodied within the various layers to correct the colour or image or affect its optical properties or to facilitate manufacture.
  • the translucent surface is achieved by spraying a uniform layer of urethane developed for this purpose on to the transparent surface.
  • the translucency may be achieved by roughening, or abrading the surface of a transparent layer or by laminating or electrostatically applying a translucent film to the surface of the transparent layer.
  • the reflective, mirrored surface may be provided with silvering, as in a common mirror, or a metallised plastic film. As with the translucent and transparent layer this surface may include various properties to either enhance or reduce various colour spectra within the visible spectrum of light.
  • One method of manufacturing a projection screen according to the invention is to produce a rigid glass reinforced plastic substrate of determined two plane curvature and texture, to mirror the concave surface. Thereafter a transparent urethane of controlled thickness is spray applied to the mirrored surface Thereafter a translucent urethane is spray applied to the transparent surface.

Landscapes

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

Abstract

L'invention concerne un écran de projection frontale qui produit une image correcte à température de couleur réaliste avec profondeur de champ, tout en masquant la pixilation générée par le projecteur, ce qui permet de produire une image réaliste, lissée et de qualité élevée. Dans un mode de réalisation préféré de la présente invention, cet écran de projection frontale comprend un substrat rigide surmonté d'une surface miroir réfléchissante (12). Une couche transparente (13) ou une couche transparente stratifiée ou coulée est appliquée sur cette surface. Une couche translucide (14) ou une pellicule translucide stratifiée est appliquée sur ladite surface transparente. D'autres couches peuvent être ajoutées à la structure de l'écran et/ou d'autres éléments peuvent être intégrés dans les différentes couches pour corriger la couleur ou l'image ou modifier les propriétés optiques de l'écran ou faciliter sa production.
PCT/ZA2003/000164 2002-11-05 2003-11-05 Ecran de projection frontale Ceased WO2004051364A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003302535A AU2003302535A1 (en) 2002-12-05 2003-11-05 A projection screen for front projection

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2002/8951 2002-11-05
ZA200208951 2002-12-05

Publications (2)

Publication Number Publication Date
WO2004051364A2 true WO2004051364A2 (fr) 2004-06-17
WO2004051364A3 WO2004051364A3 (fr) 2004-07-15

Family

ID=32470940

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ZA2003/000164 Ceased WO2004051364A2 (fr) 2002-11-05 2003-11-05 Ecran de projection frontale

Country Status (2)

Country Link
AU (1) AU2003302535A1 (fr)
WO (1) WO2004051364A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2434002A (en) * 2006-01-05 2007-07-11 Hae-Yong Choi Thin film reflective screen
CN110868579A (zh) * 2019-12-19 2020-03-06 嘉兴市永旺企业管理咨询有限公司 一种演讲屏

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4767186A (en) * 1987-10-06 1988-08-30 North American Philips Consumer Electronics Corp. Front projection screen with rear light concentrating lens array
US5473469A (en) * 1994-05-12 1995-12-05 Philips Electronics North America Corporation Front projection screen with lenticular front surface
GB9613802D0 (en) * 1996-07-01 1996-09-04 Nashua Corp Improvements in or relating to light diffusers
JPH10239777A (ja) * 1997-02-28 1998-09-11 Kuraray Co Ltd 背面投写型映像表示装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2434002A (en) * 2006-01-05 2007-07-11 Hae-Yong Choi Thin film reflective screen
GB2434002B (en) * 2006-01-05 2008-04-16 Hae-Yong Choi Thin film reflective screen
US7623288B2 (en) 2006-01-05 2009-11-24 Hae-Yong Choi High definition thin film reflective screen
CN110868579A (zh) * 2019-12-19 2020-03-06 嘉兴市永旺企业管理咨询有限公司 一种演讲屏

Also Published As

Publication number Publication date
AU2003302535A1 (en) 2004-06-23
WO2004051364A3 (fr) 2004-07-15

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