GB1585392A - Luminous panel - Google Patents

Luminous panel Download PDF

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Publication number
GB1585392A
GB1585392A GB20575/77A GB2057577A GB1585392A GB 1585392 A GB1585392 A GB 1585392A GB 20575/77 A GB20575/77 A GB 20575/77A GB 2057577 A GB2057577 A GB 2057577A GB 1585392 A GB1585392 A GB 1585392A
Authority
GB
United Kingdom
Prior art keywords
panel
diodes
diode
radiation
plate
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
Application number
GB20575/77A
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.)
International Vibration Engineering SRL
Original Assignee
International Vibration Engineering SRL
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 International Vibration Engineering SRL filed Critical International Vibration Engineering SRL
Publication of GB1585392A publication Critical patent/GB1585392A/en
Expired 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
    • G02B6/0013—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
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • G09F13/08—Signs, boards or panels, illuminated from behind the insignia using both translucent and non-translucent layers
    • 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
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0051—Diffusing sheet or layer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/4805—Shape
    • H01L2224/4809—Loop shape
    • H01L2224/48091—Arched
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/481—Disposition
    • H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
    • H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
    • H01L2224/48245—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
    • H01L2224/48247—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a bond pad of the item

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Description

(54) LUMINOUS PANEL (71) We, INTERNATIONAL VIBRATION ENGINEERING, a French Body Corporate of 29, route de Milly, 91820 Boutigny sur Essonne, France, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: The present invention relates to a luminous panel of a type having indications or inscriptions which have to be illuminated in order to be readable.
Luminous panels of this sort are known which are made, for example, of Plexiglass (Registered Trade Mark) and are intended to form instrument panels for aircraft which have to be visible both in the light and in the dark. Moreover, certain of these panels have to be illuminated in different colours, such as red, green, yellow or amber.
These known panels are formed by a plate of transparent synthetic material on the inside of which are placed small electric light bulbs. The plate is covered, generally on both its surfaces, with a layer of clear or diffusing colour, and then with an opaque layer, and a suitable engraving process, partially eliminating the opaque layer at the point of the inscriptions, allows these inscriptions to become visible due to the light diffused inside the panel.
When it is desired to obtain a particular colour of lighting, it is then necessary to apply a coloured varnish, either on the light bulbs or on the sides of its housing, in the transparent panel. As a variation it is possible equally to use lamps the glass of which has been tinted by pigments introduced into the mass.
These known panels have a certain number of disadvantages. First of all, the heat emitted by the incandescent lighting is not insignificant and brings about deterioration of the colour varnish. Moreover due to the fact that the greatest part of the electric power used by the lighting is transformed into heat it is necessary to limit the number of lamps on each unit of the surface of the synthetic panel if there is to be no risk of a premature deterioration of this support.
Also, in aircraft, the light given out by the instrument panels is reflected onto the transparent surfaces of the cockpit and that can be an annoyance for the pilots, particularly when they use night binoculars or other photomultiplying apparatus.
Finally, the low luminous output of the incandescent lighting can necessitate relatively powerful electric sources in order to obtain a good quality panel, which can be a disadvantage if the available power is limited, as in the case of panels on aircraft.
The present invention proposes to remedy these disadvantages and to provide a luminous panel having an increased quality and longevity, less use of electricity and constant illumination, particularly from the point of view of colour.
Moreover, the invention proposes to provide a panel which has an increased resistance to shocks and vibrations.
According to the present invention a luminous panel comprises a plate of synthetic transparent material, covered with an opaque layer having on one of its surfaces light transmitting inscriptions to be illuminated, the said plate receiving in its interior one or more light sources in the form of electroluminescent diodes placed in housings formed in the plate and connected to an electric feed circuit.
In one construction the electro-luminescent diodes are placed inside the housings made in the thickness of the panel and are separated from the side of each housing by an empty space.
However, in another form of construction, the electroluminescent diodes are embedded in a transparent material in an optical continuity with the material of the synthetic plate and in this case at the time of manufacture, the diodes can advantageously be put in place in the housings or pockets of the plate, embedding them inside a settable material.
It has been shown that the panels according to the invention have a remarkable resistance to shocks and vibrations which permits their use in conditions where this was not previously possible.
Moreover, it has been shown that in time a remarkable stability of illumination was obtaines as much from the point of view of the quality of the colour as from that of its intensity.
Also, the invention allows the placing in weak panel surfaces of a large number of light sources without risking secondary effects concerning the colour or the intensity of illumination or the quality of the constituent materials.
In particular when one uses, for example in an aircraft, apparatus for nocturnal observation, such as binoculars with a photomultiplying effect, the reflections of the panels in the cockpits, which could disturb observation, can easily be eliminated by putting onto the photomultiplying apparatus or the night binoculars a specific radiation filter for the diodes used. Thus, in the case of radiation from green diodes, filters can be used which prevent the passage of the band going from green to infra-red.
Other advantages and characteristics of the invention will become apparent from reading the following description made as a non-limitative example and referring to the attached drawings in which: Figure 1 is a partial section view of a panel according to one form of construction of the invention.
Figure 2 is a partial section view of a panel according to another form of construction of the invention.
Referring to Fig. 1, there is shown in cross section a part of a panel comprising a thick plate 1, e.g. in the order of 4 to 10mum, in Plexiglass (Registered Trade Mark), 1, provided with a diffusing layer in epoxy paint 2, on its upper and lower surfaces, each of these layers being itself covered with a layer of opaque varnish below at 3 and above at 4.
The upper layer is provided in places, by a process of a type known in itself, with clear spaces 5, being part of the suitable inscriptions designed to be illuminated.
From place to place cylindrical pockets with a semi-spherical bottom 6 are made in the panel from the bottom surface. The position of these pockets is determined by the requirements of the illumination. On the inside of a pocket 6, an electroluminescent diode 7 is placed, e.g. of the type sold under the reference 50824684 by Hewlett-Packard, providing a red illumination. The two conductors 8 of the diode are linked to a printed feed circuit of suitable kind (not shown).
In accordance with the invention, the internal side of the pocket 6 does not comprise any coloured covering, the coloured radiation of the diode being used directly. It is understood that the radiation of the diode should be capable of directly illuminating the part of the inscription 5 represented on the drawing, but this radiation also travels transversely in the panel to contribute with other luminous diodes to the illumination of other distant inscriptions.
However, it is possible, if desired, to use diodes of another type having a more directed radiation, e.g. on the level of the upper surface to illuminate solely one area of small diameter which permits the use of inscriptions in different colours very close to one another, something which is always difficult to bring about, without using either a filter or a hood.
Referring to Fig. 2, there is shown a variation of the invention in which the diode 7 is also introduced into a pocket analogous to pocket 6 but the electroluminescent diode is then embedded with the aid of a polymerisable substance of the same nature as the synthetic plate 1. After polymerisation, the part situated between the radiating area of the diode and the synthetic material is practically homogeneous, and thus further increases the efficacity of the diode. Further, such an installation is particularly compact and resists shocks and vibrations particularly well.
Experiments also show that longevity is increased further as the heat given off by the diodes is negligible.
Moreover, when the panels according to the invention are used in an aircraft all effect of reflections can be avoided in night binoculars, such as those sold under the trade mark TRT or ITT, by placing in the binoculars a filter preventing the passage of the specific radiation from the diodes used.
WHAT WE CLAIM IS: 1. Luminous panel comprising a plate of synthetic transparent material, covered with an opaque layer having on one of its surfaces light transmitting inscriptions to be illuminated, the said plate receiving in its interior one or more light sources in the form of electroluminescent diodes placed in housings formed in the plate and connected to an electric feed circuit.
2. Luminous panel as claimed in claim 1, in which the electroluminescent diodes are placed inside the housings made in the thickness of the panel and are separated from the side of each housing by an empty space.
3. Luminous panel as claimed in claim 1 in which the electroluminescent diodes are embedded in a transparent material in optical continuity with the material of the synthetic plate.
4. Luminous panel as claimed in any one of the claims 1 to 3, in which each surface of the plate is covered with a clear diffusing layer topped by the opaque layer.
5. Luminous panel substantially as described herein with reference to and as shown in the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (5)

**WARNING** start of CLMS field may overlap end of DESC **. Moreover, it has been shown that in time a remarkable stability of illumination was obtaines as much from the point of view of the quality of the colour as from that of its intensity. Also, the invention allows the placing in weak panel surfaces of a large number of light sources without risking secondary effects concerning the colour or the intensity of illumination or the quality of the constituent materials. In particular when one uses, for example in an aircraft, apparatus for nocturnal observation, such as binoculars with a photomultiplying effect, the reflections of the panels in the cockpits, which could disturb observation, can easily be eliminated by putting onto the photomultiplying apparatus or the night binoculars a specific radiation filter for the diodes used. Thus, in the case of radiation from green diodes, filters can be used which prevent the passage of the band going from green to infra-red. Other advantages and characteristics of the invention will become apparent from reading the following description made as a non-limitative example and referring to the attached drawings in which: Figure 1 is a partial section view of a panel according to one form of construction of the invention. Figure 2 is a partial section view of a panel according to another form of construction of the invention. Referring to Fig. 1, there is shown in cross section a part of a panel comprising a thick plate 1, e.g. in the order of 4 to 10mum, in Plexiglass (Registered Trade Mark), 1, provided with a diffusing layer in epoxy paint 2, on its upper and lower surfaces, each of these layers being itself covered with a layer of opaque varnish below at 3 and above at 4. The upper layer is provided in places, by a process of a type known in itself, with clear spaces 5, being part of the suitable inscriptions designed to be illuminated. From place to place cylindrical pockets with a semi-spherical bottom 6 are made in the panel from the bottom surface. The position of these pockets is determined by the requirements of the illumination. On the inside of a pocket 6, an electroluminescent diode 7 is placed, e.g. of the type sold under the reference 50824684 by Hewlett-Packard, providing a red illumination. The two conductors 8 of the diode are linked to a printed feed circuit of suitable kind (not shown). In accordance with the invention, the internal side of the pocket 6 does not comprise any coloured covering, the coloured radiation of the diode being used directly. It is understood that the radiation of the diode should be capable of directly illuminating the part of the inscription 5 represented on the drawing, but this radiation also travels transversely in the panel to contribute with other luminous diodes to the illumination of other distant inscriptions. However, it is possible, if desired, to use diodes of another type having a more directed radiation, e.g. on the level of the upper surface to illuminate solely one area of small diameter which permits the use of inscriptions in different colours very close to one another, something which is always difficult to bring about, without using either a filter or a hood. Referring to Fig. 2, there is shown a variation of the invention in which the diode 7 is also introduced into a pocket analogous to pocket 6 but the electroluminescent diode is then embedded with the aid of a polymerisable substance of the same nature as the synthetic plate 1. After polymerisation, the part situated between the radiating area of the diode and the synthetic material is practically homogeneous, and thus further increases the efficacity of the diode. Further, such an installation is particularly compact and resists shocks and vibrations particularly well. Experiments also show that longevity is increased further as the heat given off by the diodes is negligible. Moreover, when the panels according to the invention are used in an aircraft all effect of reflections can be avoided in night binoculars, such as those sold under the trade mark TRT or ITT, by placing in the binoculars a filter preventing the passage of the specific radiation from the diodes used. WHAT WE CLAIM IS:
1. Luminous panel comprising a plate of synthetic transparent material, covered with an opaque layer having on one of its surfaces light transmitting inscriptions to be illuminated, the said plate receiving in its interior one or more light sources in the form of electroluminescent diodes placed in housings formed in the plate and connected to an electric feed circuit.
2. Luminous panel as claimed in claim 1, in which the electroluminescent diodes are placed inside the housings made in the thickness of the panel and are separated from the side of each housing by an empty space.
3. Luminous panel as claimed in claim 1 in which the electroluminescent diodes are embedded in a transparent material in optical continuity with the material of the synthetic plate.
4. Luminous panel as claimed in any one of the claims 1 to 3, in which each surface of the plate is covered with a clear diffusing layer topped by the opaque layer.
5. Luminous panel substantially as described herein with reference to and as shown in the accompanying drawings.
GB20575/77A 1976-05-17 1977-05-16 Luminous panel Expired GB1585392A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7614744A FR2352359A1 (en) 1976-05-17 1976-05-17 LUMINOUS PANEL

Publications (1)

Publication Number Publication Date
GB1585392A true GB1585392A (en) 1981-03-04

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ID=9173200

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20575/77A Expired GB1585392A (en) 1976-05-17 1977-05-16 Luminous panel

Country Status (5)

Country Link
DE (1) DE2722291A1 (en)
FR (1) FR2352359A1 (en)
GB (1) GB1585392A (en)
IT (1) IT1085544B (en)
NL (1) NL7705412A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227870A (en) * 1989-01-05 1990-08-08 Hi Lite Signs Limited A sign
GB2240420A (en) * 1989-12-21 1991-07-31 Hi Lite Signs Ltd A process for treating a panel for an illuminated sign
GB2279482A (en) * 1993-06-25 1995-01-04 World Auto Plate Ltd Number plate including luminous characters
EP1077441A1 (en) * 1999-08-18 2001-02-21 Eastman Kodak Company Mixed signaling device for rooms with mesopic lighting
WO2001079748A2 (en) * 2000-04-13 2001-10-25 Maxxluxx Lichtwerbung Gmbh Luminous diode arrangement in transparent, two-dimensional advertising media
WO2004068448A1 (en) * 2003-01-30 2004-08-12 Touchsensor Technologies, Llc Integrated low profile display
EP1489582A2 (en) * 2003-06-20 2004-12-22 Identity Group, Inc. Illuminated sign
WO2005091254A3 (en) * 2004-03-18 2006-03-23 Enno Ramb Display body for illuminated signs
EP2181458A1 (en) * 2007-06-25 2010-05-05 Lumination, LLC Apparatus and method for increasing signal visibility
US7850339B2 (en) 2003-01-30 2010-12-14 Touchsensor Technologies, Llc Display having thin cross-section and/or multi-colored output
US10051726B2 (en) 2013-12-17 2018-08-14 Electrolux Appliances Aktiebolag User interface arrangement

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JPS5976304A (en) * 1982-10-20 1984-05-01 ショーボンド建設株式会社 Light emittng block and light emitting display apparatus
FR2551242B1 (en) * 1983-08-30 1986-01-17 Griffon Gravure Sarl INFORMATION PANEL WITH LIGHTING, PARTICULARLY FOR CONTROL AND SYNOPTIC
DE3331724A1 (en) * 1983-09-02 1985-03-21 Robert Bosch Gmbh, 7000 Stuttgart ARRANGEMENT FOR LIGHTING PASSIVE INDICATORS
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DE3723073A1 (en) * 1987-07-11 1989-01-19 Loewe Opta Gmbh Display for alphanumeric characters and symbols
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DE8811397U1 (en) * 1988-09-09 1988-12-01 Stützer, Helmut, 8711 Willanzheim Panel or similar made of translucent material with letters, numbers, symbols or similar for motor vehicles
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DE3904656A1 (en) * 1989-02-16 1990-08-23 Vdo Schindling POINTER INSTRUMENT
FR2651356B1 (en) * 1989-08-22 1994-02-04 Thomson Csf FRONT PANEL EQUIPPED WITH LIGHT SOURCES.
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DE4109532A1 (en) * 1990-03-30 1991-10-02 Toyoda Gosei Kk Illuminated trim panel for vehicle - has small light openings for integral lamp and with plane appearance when switched off
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DE29817874U1 (en) 1998-10-07 1998-12-24 Sarnatech Paulmann & Crone Gmb Device for guiding light
DE10163116B4 (en) * 2001-12-24 2008-04-10 G.L.I. Global Light Industries Gmbh Method for producing light-conducting LED bodies in two spatially and temporally separate stages
DE10250675A1 (en) * 2002-10-31 2004-05-19 Hella Kg Hueck & Co. Display unit, especially for motor vehicles, has illumination element with diffusing coating that is joined to smoked glass coating over their areas
DE102007017637A1 (en) 2007-04-13 2008-10-16 Hidde, Axel R., Dr. Energy and information transmission method for installation engineering, involves using energy-and/or information transmission technique for transmission between device blocks, electrified attachments and frames
DE102008015550A1 (en) * 2008-03-25 2009-10-08 Osram Opto Semiconductors Gmbh Optoelectronic protection device for projecting letters or pictograms on projection surface, comprises optoelectronic semiconductor component, which comprises luminescence diode chip
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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227870A (en) * 1989-01-05 1990-08-08 Hi Lite Signs Limited A sign
GB2227870B (en) * 1989-01-05 1992-11-18 Hi Lite Signs Limited A sign
GB2240420A (en) * 1989-12-21 1991-07-31 Hi Lite Signs Ltd A process for treating a panel for an illuminated sign
GB2240420B (en) * 1989-12-21 1993-09-08 Hi Lite Signs Ltd An illuminated sign.
GB2279482A (en) * 1993-06-25 1995-01-04 World Auto Plate Ltd Number plate including luminous characters
AU673602B2 (en) * 1993-06-25 1996-11-14 World Auto Plate Ltd. Number plate including luminous characters
GB2279482B (en) * 1993-06-25 1996-12-18 World Auto Plate Ltd Number plate including luminous characters
EP1077441A1 (en) * 1999-08-18 2001-02-21 Eastman Kodak Company Mixed signaling device for rooms with mesopic lighting
FR2797705A1 (en) * 1999-08-18 2001-02-23 Eastman Kodak Co MIXED SIGNALING DEVICE FOR ROOMS WITH MESOPIC ILLUMINATION
US6325530B1 (en) 1999-08-18 2001-12-04 Eastman Kodak Company Mixed signaling device for rooms with mesopic lighting
WO2001079748A2 (en) * 2000-04-13 2001-10-25 Maxxluxx Lichtwerbung Gmbh Luminous diode arrangement in transparent, two-dimensional advertising media
WO2001079748A3 (en) * 2000-04-13 2002-05-10 Maxxluxx Lichtwerbung Gmbh Luminous diode arrangement in transparent, two-dimensional advertising media
WO2004068448A1 (en) * 2003-01-30 2004-08-12 Touchsensor Technologies, Llc Integrated low profile display
JP2006516764A (en) * 2003-01-30 2006-07-06 タッチセンサー テクノロジーズ，エルエルシー Integrated thin display
US7175304B2 (en) 2003-01-30 2007-02-13 Touchsensor Technologies, Llc Integrated low profile display
AU2004208353B2 (en) * 2003-01-30 2008-06-26 Touchsensor Technologies, Llc Integrated low profile display
US7850339B2 (en) 2003-01-30 2010-12-14 Touchsensor Technologies, Llc Display having thin cross-section and/or multi-colored output
KR101072209B1 (en) 2003-01-30 2011-10-10 터치센서 테크놀로지스, 엘엘씨 Integrated low profile display
EP1489582A2 (en) * 2003-06-20 2004-12-22 Identity Group, Inc. Illuminated sign
EP1489582A3 (en) * 2003-06-20 2005-11-02 Identity Group, Inc. Illuminated sign
US7162821B2 (en) 2003-06-20 2007-01-16 Identity Group, Inc. Illuminated sign
WO2005091254A3 (en) * 2004-03-18 2006-03-23 Enno Ramb Display body for illuminated signs
EP2181458A1 (en) * 2007-06-25 2010-05-05 Lumination, LLC Apparatus and method for increasing signal visibility
EP2181458A4 (en) * 2007-06-25 2011-05-18 Lumination Llc Apparatus and method for increasing signal visibility
US10051726B2 (en) 2013-12-17 2018-08-14 Electrolux Appliances Aktiebolag User interface arrangement

Also Published As

Publication number Publication date
FR2352359A1 (en) 1977-12-16
IT1085544B (en) 1985-05-28
FR2352359B1 (en) 1981-11-27
DE2722291A1 (en) 1977-11-24
NL7705412A (en) 1977-11-21

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee