GB2222293B - Backlight for radio pager lcd - Google Patents

Backlight for radio pager lcd

Info

Publication number
GB2222293B
GB2222293B GB8820077A GB8820077A GB2222293B GB 2222293 B GB2222293 B GB 2222293B GB 8820077 A GB8820077 A GB 8820077A GB 8820077 A GB8820077 A GB 8820077A GB 2222293 B GB2222293 B GB 2222293B
Authority
GB
United Kingdom
Prior art keywords
backlight
radio pager
lcd
pager lcd
radio
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 - Lifetime
Application number
GB8820077A
Other versions
GB8820077D0 (en
GB2222293A (en
Inventor
Kenneth Robert Hattersley
Alan George Zimmerman
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.)
STC PLC
Nortel Networks Optical Components Ltd
Original Assignee
STC PLC
Northern Telecom Europe 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 STC PLC, Northern Telecom Europe Ltd filed Critical STC PLC
Priority to GB8820077A priority Critical patent/GB2222293B/en
Publication of GB8820077D0 publication Critical patent/GB8820077D0/en
Publication of GB2222293A publication Critical patent/GB2222293A/en
Application granted granted Critical
Publication of GB2222293B publication Critical patent/GB2222293B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G02B6/0021—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
    • 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
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/18—Edge-illuminated signs
    • G09F2013/1804—Achieving homogeneous illumination
    • G09F2013/1831—Achieving homogeneous illumination using more than one light source
GB8820077A 1988-08-24 1988-08-24 Backlight for radio pager lcd Expired - Lifetime GB2222293B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8820077A GB2222293B (en) 1988-08-24 1988-08-24 Backlight for radio pager lcd

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8820077A GB2222293B (en) 1988-08-24 1988-08-24 Backlight for radio pager lcd

Publications (3)

Publication Number Publication Date
GB8820077D0 GB8820077D0 (en) 1988-09-28
GB2222293A GB2222293A (en) 1990-02-28
GB2222293B true GB2222293B (en) 1992-06-17

Family

ID=10642621

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8820077A Expired - Lifetime GB2222293B (en) 1988-08-24 1988-08-24 Backlight for radio pager lcd

Country Status (1)

Country Link
GB (1) GB2222293B (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3752974A (en) * 1971-12-13 1973-08-14 Coastal Dynamics Corp Uniform illumination with edge lighting
GB2192084A (en) * 1986-06-30 1987-12-31 Mitsubishi Electric Corp Planar light emitting device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3752974A (en) * 1971-12-13 1973-08-14 Coastal Dynamics Corp Uniform illumination with edge lighting
GB2192084A (en) * 1986-06-30 1987-12-31 Mitsubishi Electric Corp Planar light emitting device

Also Published As

Publication number Publication date
GB8820077D0 (en) 1988-09-28
GB2222293A (en) 1990-02-28

Similar Documents

Publication Publication Date Title
GB2234621B (en) Liquid crystal display
HK75496A (en) Illumination system for an lcd display system
EP0433999A3 (en) Liquid crystal display
EP0435529A3 (en) Liquid crystal device
GB8911697D0 (en) Liquid crystal devices
GB2216703B (en) Display pager with supplemental display means
EP0422613A3 (en) Liquid crystal device
AR243988A1 (en) Microcomputer controlled display backlight
EP0414048A3 (en) Matrix-liquid crystal display
EP0430299A3 (en) Liquid crystal device
EP0410949A3 (en) Liquid crystal display
GB2219422B (en) Pager display control
GB2202989B (en) Crystal resonnator
EP0422996A3 (en) Liquid crystal compound
EP0350330A3 (en) Liquid crystal compounds
EP0435240A3 (en) Liquid crystal compound
GB2264583B (en) Data display radio pager
AU7376787A (en) Pager with display
KR950005936B1 (en) Driving circuit for lcd
GB8904609D0 (en) Crystal oscillator-controlled clocks
EP0434000A3 (en) Liquid crystal display
GB8811130D0 (en) Liquid crystal material
EP0420072A3 (en) Liquid crystal device
GB2222293B (en) Backlight for radio pager lcd
EP0425366A3 (en) Liquid crystal compound

Legal Events

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

Effective date: 19920917