GB1438639A - Indicator panels - Google Patents
Indicator panelsInfo
- 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
- 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
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
- G02B6/0013—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.
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 | |
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 | |
DE19732353712 DE2353712A1 (en) | 1972-10-28 | 1973-10-26 | DISPLAY BOARD |
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 DE DE19732353712 patent/DE2353712A1/en active Pending
- 1973-10-26 JP JP48120075A patent/JPS4977650A/ja 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 |
AU6143873A (en) | 1975-04-17 |
DE2353712A1 (en) | 1974-05-02 |
FR2205245A5 (en) | 1974-05-24 |
IN139638B (en) | 1976-07-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |