GB1438639A – Indicator panels
– Google Patents
GB1438639A – Indicator panels
– Google Patents
Indicator panels
Info
Publication number
GB1438639A
GB1438639A
GB4981972A
GB4981972A
GB1438639A
GB 1438639 A
GB1438639 A
GB 1438639A
GB 4981972 A
GB4981972 A
GB 4981972A
GB 4981972 A
GB4981972 A
GB 4981972A
GB 1438639 A
GB1438639 A
GB 1438639A
Authority
GB
United Kingdom
Prior art keywords
panel
light
indicia
ridges
oct
Prior art date
1972-10-28
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
Application number
GB4981972A
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.)
Lucas Electrical Co Ltd
Original Assignee
Lucas Electrical Co 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.)
1972-10-28
Filing date
1972-10-28
Publication date
1976-06-09
1972-10-28
Application filed by Lucas Electrical Co Ltd
filed
Critical
Lucas Electrical Co Ltd
1972-10-28
Priority to GB4981972A
priority
Critical
patent/GB1438639A/en
1973-10-16
Priority to AU61438/73A
priority
patent/AU481778B2/en
1973-10-18
Priority to IN2320/CAL/73A
priority
patent/IN139638B/en
1973-10-24
Priority to FR7337835A
priority
patent/FR2205245A5/fr
1973-10-26
Priority to DE19732353712
priority
patent/DE2353712A1/en
1973-10-26
Priority to IT5336573A
priority
patent/IT996335B/en
1973-10-26
Priority to JP48120075A
priority
patent/JPS4977650A/ja
1976-06-09
Publication of GB1438639A
publication
Critical
patent/GB1438639A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
G02B6/0013—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
G02B6/0018—Redirecting means on the surface of 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
G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
G02B6/0028—Light guide, e.g. taper
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
G02B6/0033—Means for improving the coupling-out of light from the light guide
G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
G02B6/006—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to produce indicia, symbols, texts or the like
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
G02B6/0095—Light guides as housings, housing portions, shelves, doors, tiles, windows, or the like
Abstract
1438639 Illuminated signs LUCAS ELECTRICAL CO Ltd 9 Oct 1973 [28 Oct 1972] 49819/72 Heading G5C An indicator panel 11 for use in a road vehicle instrument panel is formed from light conductive material having an inclined end surface 13 by which light entering the panel is reflected down to opposed reflecting surfaces 14, 15 which return the light back along the panel interior. The double passage of light inside the panel gives even illumination of symbols or indicia on ridges 12. The panel may be used in a housing 16 adjacent a switch whose four positions are shown by the indicia on ridges 12. The light input for surface 13 may be from a lightpipe cable plugged into a socket in housing 16.
GB4981972A
1972-10-28
1972-10-28
Indicator panels
Expired
GB1438639A
(en)
Priority Applications (7)
Application Number
Priority Date
Filing Date
Title
GB4981972A
GB1438639A
(en)
1972-10-28
1972-10-28
Indicator panels
AU61438/73A
AU481778B2
(en)
1972-10-28
1973-10-16
Indicator panels
IN2320/CAL/73A
IN139638B
(en)
1972-10-28
1973-10-18
FR7337835A
FR2205245A5
(en)
1972-10-28
1973-10-24
DE19732353712
DE2353712A1
(en)
1972-10-28
1973-10-26
DISPLAY BOARD
IT5336573A
IT996335B
(en)
1972-10-28
1973-10-26
INDICATOR PANEL AND DEVICE THAT INCLUDES IT IN PARTICULAR FOR MOTOR VEHICLES
JP48120075A
JPS4977650A
(en)
1972-10-28
1973-10-26
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB4981972A
GB1438639A
(en)
1972-10-28
1972-10-28
Indicator panels
Publications (1)
Publication Number
Publication Date
GB1438639A
true
GB1438639A
(en)
1976-06-09
Family
ID=10453657
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB4981972A
Expired
GB1438639A
(en)
1972-10-28
1972-10-28
Indicator panels
Country Status (6)
Country
Link
JP
(1)
JPS4977650A
(en)
DE
(1)
DE2353712A1
(en)
FR
(1)
FR2205245A5
(en)
GB
(1)
GB1438639A
(en)
IN
(1)
IN139638B
(en)
IT
(1)
IT996335B
(en)
1972
1972-10-28
GB
GB4981972A
patent/GB1438639A/en
not_active
Expired
1973
1973-10-18
IN
IN2320/CAL/73A
patent/IN139638B/en
unknown
1973-10-24
FR
FR7337835A
patent/FR2205245A5/fr
not_active
Expired
1973-10-26
JP
JP48120075A
patent/JPS4977650A/ja
active
Pending
1973-10-26
DE
DE19732353712
patent/DE2353712A1/en
active
Pending
1973-10-26
IT
IT5336573A
patent/IT996335B/en
active
Also Published As
Publication number
Publication date
IT996335B
(en)
1975-12-10
JPS4977650A
(en)
1974-07-26
FR2205245A5
(en)
1974-05-24
AU6143873A
(en)
1975-04-17
IN139638B
(en)
1976-07-10
DE2353712A1
(en)
1974-05-02
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(en)
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Legal Events
Date
Code
Title
Description
1976-10-20
PS
Patent sealed
1982-05-19
PCNP
Patent ceased through non-payment of renewal fee
