WO2004051364A2 - Ecran de projection frontale - Google Patents
Ecran de projection frontale Download PDFInfo
- 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
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.
Abstract
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 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 (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2434002A (en) * | 2006-01-05 | 2007-07-11 | Hae-Yong Choi | Thin film reflective screen |
Citations (4)
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 |
GB2314943A (en) * | 1996-07-01 | 1998-01-14 | Nashua Corp | Projection or depixelating screen |
US20020012165A1 (en) * | 1997-02-28 | 2002-01-31 | Kuraray Co., Ltd. | Rear Projection Image Display Apparatus Including Light Exit Surface Configured to Reduce Noise |
-
2003
- 2003-11-05 WO PCT/ZA2003/000164 patent/WO2004051364A2/fr not_active Application Discontinuation
- 2003-11-05 AU AU2003302535A patent/AU2003302535A1/en not_active Abandoned
Patent Citations (4)
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 |
GB2314943A (en) * | 1996-07-01 | 1998-01-14 | Nashua Corp | Projection or depixelating screen |
US20020012165A1 (en) * | 1997-02-28 | 2002-01-31 | Kuraray Co., Ltd. | Rear Projection Image Display Apparatus Including Light Exit Surface Configured to Reduce Noise |
Cited By (3)
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 |
Also Published As
Publication number | Publication date |
---|---|
AU2003302535A1 (en) | 2004-06-23 |
WO2004051364A3 (fr) | 2004-07-15 |
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