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GB2325330A - Ambient illuminated electro-optic display device - Google Patents

Ambient illuminated electro-optic display device

Info

Publication number
GB2325330A
GB2325330A GB9820095A GB9820095A GB2325330A GB 2325330 A GB2325330 A GB 2325330A GB 9820095 A GB9820095 A GB 9820095A GB 9820095 A GB9820095 A GB 9820095A GB 2325330 A GB2325330 A GB 2325330A
Authority
GB
United Kingdom
Prior art keywords
cell
electro
display device
light ray
optic
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.)
Granted
Application number
GB9820095A
Other versions
GB9820095D0 (en
GB2325330B (en
Inventor
George T Valliath
Robert B Akins
Kevin W Jelley
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.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Publication of GB9820095D0 publication Critical patent/GB9820095D0/en
Publication of GB2325330A publication Critical patent/GB2325330A/en
Application granted granted Critical
Publication of GB2325330B publication Critical patent/GB2325330B/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

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

An electro-optic display device (10) includes an electro-optic cell (14), such as a liquid crystal cell, a reflector (16), and a transmission holographic optical element (12). The electro-optic cell (14) includes a cell front (56), a cell back (58) opposite the cell front (56), and at least one cell region having a transparent mode. The reflector (16, 46) receives light that traverses the cell region and reflects the light toward the cell front (56). The transmission holographic optical element (12) is optically coupled to the cell front (56) and includes a front face (24). The holographic optical element (12) receives a light ray (26) at a first angle (31) and a second reflected light ray and diffracts the reflected light ray, such that the reflected light ray is emitted from the front face (24) at a third angle (34) that is distinct from the first angle (31), thereby increasing the contrast and apparent brightness of the display device (10).
GB9820095A 1997-01-16 1998-01-16 Ambient illuminated electro-optic display device Expired - Fee Related GB2325330B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US78373197A 1997-01-16 1997-01-16
PCT/US1998/000860 WO1998032047A1 (en) 1997-01-16 1998-01-16 Ambient illuminated electro-optic display device

Publications (3)

Publication Number Publication Date
GB9820095D0 GB9820095D0 (en) 1998-11-11
GB2325330A true GB2325330A (en) 1998-11-18
GB2325330B GB2325330B (en) 2001-06-20

Family

ID=25130222

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9820095A Expired - Fee Related GB2325330B (en) 1997-01-16 1998-01-16 Ambient illuminated electro-optic display device

Country Status (4)

Country Link
AU (1) AU6027998A (en)
DE (1) DE19880175T1 (en)
GB (1) GB2325330B (en)
WO (1) WO1998032047A1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100703140B1 (en) 1998-04-08 2007-04-05 이리다임 디스플레이 코포레이션 Interference modulator and its manufacturing method
US8928967B2 (en) 1998-04-08 2015-01-06 Qualcomm Mems Technologies, Inc. Method and device for modulating light
US6636285B2 (en) 2001-11-01 2003-10-21 Motorola, Inc. Reflective liquid crystal display with improved contrast
TWI289708B (en) 2002-12-25 2007-11-11 Qualcomm Mems Technologies Inc Optical interference type color display
US7342705B2 (en) 2004-02-03 2008-03-11 Idc, Llc Spatial light modulator with integrated optical compensation structure
US7630123B2 (en) 2004-09-27 2009-12-08 Qualcomm Mems Technologies, Inc. Method and device for compensating for color shift as a function of angle of view
US7916980B2 (en) 2006-01-13 2011-03-29 Qualcomm Mems Technologies, Inc. Interconnect structure for MEMS device
US8872085B2 (en) 2006-10-06 2014-10-28 Qualcomm Mems Technologies, Inc. Display device having front illuminator with turning features
CN101600901A (en) 2006-10-06 2009-12-09 高通Mems科技公司 Optical loss structure integrated in illumination device of display
US8721149B2 (en) 2008-01-30 2014-05-13 Qualcomm Mems Technologies, Inc. Illumination device having a tapered light guide
WO2009102731A2 (en) * 2008-02-12 2009-08-20 Qualcomm Mems Technologies, Inc. Devices and methods for enhancing brightness of displays using angle conversion layers
US20100302218A1 (en) 2009-05-29 2010-12-02 Qualcomm Mems Technologies, Inc. Illumination devices and methods of fabrication thereof
US8902484B2 (en) 2010-12-15 2014-12-02 Qualcomm Mems Technologies, Inc. Holographic brightness enhancement film

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837729A (en) * 1973-05-14 1974-09-24 Hoffmann La Roche Liquid crystal display
US5629784A (en) * 1994-04-12 1997-05-13 Ois Optical Imaging Systems, Inc. Liquid crystal display with holographic diffuser and prism sheet on viewer side

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2306229B (en) * 1995-10-13 1999-04-07 Ibm Diffusely reflective display cell

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837729A (en) * 1973-05-14 1974-09-24 Hoffmann La Roche Liquid crystal display
US5629784A (en) * 1994-04-12 1997-05-13 Ois Optical Imaging Systems, Inc. Liquid crystal display with holographic diffuser and prism sheet on viewer side

Also Published As

Publication number Publication date
WO1998032047A1 (en) 1998-07-23
GB9820095D0 (en) 1998-11-11
DE19880175T1 (en) 1999-04-15
AU6027998A (en) 1998-08-07
GB2325330B (en) 2001-06-20

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Legal Events

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

Effective date: 20050116