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GB2314943B - Improvements in or relating to light diffusers - Google Patents

Improvements in or relating to light diffusers

Info

Publication number
GB2314943B
GB2314943B GB9713925A GB9713925A GB2314943B GB 2314943 B GB2314943 B GB 2314943B GB 9713925 A GB9713925 A GB 9713925A GB 9713925 A GB9713925 A GB 9713925A GB 2314943 B GB2314943 B GB 2314943B
Authority
GB
United Kingdom
Prior art keywords
relating
light diffusers
diffusers
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.)
Expired - Fee Related
Application number
GB9713925A
Other versions
GB2314943A (en
GB9713925D0 (en
Inventor
Terence Edward Yeo
Christopher A Barnett
Robin Clabburn
Michael Dorling
Basil Omar
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.)
Nashua Photo Ltd
Nashua Corp
Original Assignee
Nashua Photo Ltd
Nashua 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 Nashua Photo Ltd, Nashua Corp filed Critical Nashua Photo Ltd
Publication of GB9713925D0 publication Critical patent/GB9713925D0/en
Publication of GB2314943A publication Critical patent/GB2314943A/en
Application granted granted Critical
Publication of GB2314943B publication Critical patent/GB2314943B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • 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
    • 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)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)
GB9713925A 1996-07-01 1997-07-01 Improvements in or relating to light diffusers Expired - Fee Related GB2314943B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB9613802.9A GB9613802D0 (en) 1996-07-01 1996-07-01 Improvements in or relating to light diffusers

Publications (3)

Publication Number Publication Date
GB9713925D0 GB9713925D0 (en) 1997-09-03
GB2314943A GB2314943A (en) 1998-01-14
GB2314943B true GB2314943B (en) 2000-08-30

Family

ID=10796170

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB9613802.9A Pending GB9613802D0 (en) 1996-07-01 1996-07-01 Improvements in or relating to light diffusers
GB9713925A Expired - Fee Related GB2314943B (en) 1996-07-01 1997-07-01 Improvements in or relating to light diffusers

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB9613802.9A Pending GB9613802D0 (en) 1996-07-01 1996-07-01 Improvements in or relating to light diffusers

Country Status (1)

Country Link
GB (2) GB9613802D0 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7742124B2 (en) 2001-04-20 2010-06-22 Puredepth Limited Optical retarder
US7742239B2 (en) 2002-03-17 2010-06-22 Puredepth Limited Method to control point spread function of an image
US8146277B2 (en) 2002-09-20 2012-04-03 Puredepth Limited Multi-view display
US8149353B2 (en) 2001-10-11 2012-04-03 Puredepth Limited Visual display unit illumination
US8416150B2 (en) 2007-08-22 2013-04-09 Igt Method and system for determining a position for an interstital diffuser for use in a multi-layer display
US9137525B2 (en) 2002-07-15 2015-09-15 Pure Depth Limited Multilayer video screen

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6724535B1 (en) 1998-12-31 2004-04-20 Microsharp Corporation Limited Stepped surface diffuser
RU2242037C2 (en) * 1999-07-08 2004-12-10 АРСЕНИЧ Святослав Иванович Projecting system
GB9919689D0 (en) 1999-08-19 1999-10-20 Microsharp Corp Limited Back-lighting arrangement and the like
CN1201168C (en) 2000-11-17 2005-05-11 深度视频成像有限公司 Altering surface of display screen from matt to optically smooth
JP2006500601A (en) * 2002-02-27 2006-01-05 イノヴェイティヴ ソリューションズ アンド サポート インコーポレイテッド Improved low reflection flat panel display
WO2004051364A2 (en) * 2002-11-05 2004-06-17 Patrick Normand Argall A projection screen for front projection
NZ526028A (en) 2003-05-21 2006-02-24 Pure Depth Ltd Backlighting system for display screen utilised to control the distribution of power to at least one light source
NL1023737C2 (en) * 2003-06-24 2004-12-28 Klaus Herbert Gunter Wenger Light-distributing optical foil.
DK1701203T3 (en) * 2005-03-10 2007-09-24 Nanogate Advanced Materials Gmbh Flat
JP5792969B2 (en) * 2011-03-04 2015-10-14 キヤノン株式会社 Optical writing head and image forming apparatus

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB477825A (en) * 1936-04-06 1938-01-06 Mclennan Lennard Improvements in projection screens
GB481435A (en) * 1936-09-05 1938-03-07 Lino Tansini Improvements in or relating to projection screens
GB782033A (en) * 1954-06-28 1957-08-28 Johan Sam Jacobson Improvements in and relating to picture projection screens
GB1419945A (en) * 1971-12-15 1975-12-31 Freen Ltd Reag projection screen
US3966301A (en) * 1974-12-19 1976-06-29 Qantix Corporation Transparent screen having intermittent portions for reducing reflection from ambient light
GB2048514A (en) * 1979-04-11 1980-12-10 Minnesota Mining & Mfg Front projection screen
US4329019A (en) * 1968-03-21 1982-05-11 Takanori Okoshi Three-dimensional image display apparatus and a screen therefor
WO1983001310A1 (en) * 1981-10-06 1983-04-14 Chung, Chi, H. Liquid crystal display having high brightness reflector
GB2118210A (en) * 1982-03-12 1983-10-26 Marconi Co Ltd Reflectors for passive display devices
EP0163766A1 (en) * 1981-06-15 1985-12-11 Mitsubishi Rayon Co., Ltd. Rear projection screen
WO1987001470A1 (en) * 1985-08-30 1987-03-12 Scan Screen A/S Transparent rear projection screen

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB477825A (en) * 1936-04-06 1938-01-06 Mclennan Lennard Improvements in projection screens
GB481435A (en) * 1936-09-05 1938-03-07 Lino Tansini Improvements in or relating to projection screens
GB782033A (en) * 1954-06-28 1957-08-28 Johan Sam Jacobson Improvements in and relating to picture projection screens
US4329019A (en) * 1968-03-21 1982-05-11 Takanori Okoshi Three-dimensional image display apparatus and a screen therefor
GB1419945A (en) * 1971-12-15 1975-12-31 Freen Ltd Reag projection screen
US3966301A (en) * 1974-12-19 1976-06-29 Qantix Corporation Transparent screen having intermittent portions for reducing reflection from ambient light
GB2048514A (en) * 1979-04-11 1980-12-10 Minnesota Mining & Mfg Front projection screen
EP0163766A1 (en) * 1981-06-15 1985-12-11 Mitsubishi Rayon Co., Ltd. Rear projection screen
WO1983001310A1 (en) * 1981-10-06 1983-04-14 Chung, Chi, H. Liquid crystal display having high brightness reflector
GB2118210A (en) * 1982-03-12 1983-10-26 Marconi Co Ltd Reflectors for passive display devices
WO1987001470A1 (en) * 1985-08-30 1987-03-12 Scan Screen A/S Transparent rear projection screen

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7742124B2 (en) 2001-04-20 2010-06-22 Puredepth Limited Optical retarder
US8149353B2 (en) 2001-10-11 2012-04-03 Puredepth Limited Visual display unit illumination
US8687149B2 (en) 2001-10-11 2014-04-01 Pure Depth Limited Visual display unit illumination
US7742239B2 (en) 2002-03-17 2010-06-22 Puredepth Limited Method to control point spread function of an image
US9137525B2 (en) 2002-07-15 2015-09-15 Pure Depth Limited Multilayer video screen
US8146277B2 (en) 2002-09-20 2012-04-03 Puredepth Limited Multi-view display
US8416150B2 (en) 2007-08-22 2013-04-09 Igt Method and system for determining a position for an interstital diffuser for use in a multi-layer display

Also Published As

Publication number Publication date
GB2314943A (en) 1998-01-14
GB9713925D0 (en) 1997-09-03
GB9613802D0 (en) 1996-09-04

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20010701

728V Application for restoration filed (sect. 28/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
728Y Application for restoration allowed (sect. 28/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20050701