EP0306659A2 - Unité d'affichage éclairée, en particulier numéro de maison, panneau de signalisation ou support de publicité - Google Patents

Unité d'affichage éclairée, en particulier numéro de maison, panneau de signalisation ou support de publicité Download PDF

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Publication number
EP0306659A2
EP0306659A2 EP88111105A EP88111105A EP0306659A2 EP 0306659 A2 EP0306659 A2 EP 0306659A2 EP 88111105 A EP88111105 A EP 88111105A EP 88111105 A EP88111105 A EP 88111105A EP 0306659 A2 EP0306659 A2 EP 0306659A2
Authority
EP
European Patent Office
Prior art keywords
display unit
guide plate
light
light guide
unit according
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
EP88111105A
Other languages
German (de)
English (en)
Other versions
EP0306659B1 (fr
EP0306659A3 (en
Inventor
Karl-Heinz Schöniger
Winfried Scheid
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.)
Inotec GmbH Gesellschaft fuer Innovative Technik
Original Assignee
Inotec GmbH Gesellschaft fuer Innovative Technik
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 Inotec GmbH Gesellschaft fuer Innovative Technik filed Critical Inotec GmbH Gesellschaft fuer Innovative Technik
Priority to AT88111105T priority Critical patent/ATE98035T1/de
Publication of EP0306659A2 publication Critical patent/EP0306659A2/fr
Publication of EP0306659A3 publication Critical patent/EP0306659A3/de
Application granted granted Critical
Publication of EP0306659B1 publication Critical patent/EP0306659B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
    • 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
    • G09F13/0418—Constructional details
    • G09F13/0472—Traffic signs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S136/00—Batteries: thermoelectric and photoelectric
    • Y10S136/291—Applications
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00—Illumination
    • Y10S362/802—Position or condition responsive switch
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00—Illumination
    • Y10S362/812—Signs

Definitions

  • the invention relates to an illuminated display unit according to the preamble of claim 1.
  • Such a display unit is known from DE-OS 33 22 393.
  • light-emitting diodes are inserted from the narrow edges into a diffusing screen in order to introduce the light as completely as possible into it. From Fig. 1 it can be concluded that a symbol is hereby illuminated from behind, so that a contrast arises.
  • the luminous efficacy is, however, very low, so that this arrangement is not suitable, for example, for larger display areas.
  • the known display units overall have the disadvantage of a relatively high power requirement, so that a large number of solar cells and a large storage capacity are required when operating with solar cells.
  • the invention is therefore based on the object of an illuminated display unit of the type mentioned To develop, which ensures a more uniform lighting and larger display areas with improved light output.
  • the invention is based on the consideration that light from a fluorescent light guide plate can essentially only emerge at contact points or cut edges. Since all the lateral boundary edges are provided with a reflective layer, the light cannot escape there, but is reflected back into the plate. The light can thus only emerge at the point at which the display symbols or their negatives are attached, namely on the rear surface of the light guide plate. These points are thus illuminated very intensively from all sides by the light distributed in the light guide plate and are therefore very well visible through the light guide plate, which is further improved by the contrast surface arranged behind it. Since all of the light is concentrated on these areas with almost no loss, the light output is very good. In contrast, for example, to the arrangements known from DE-OS 36 02 819 or US Pat. No.
  • the display symbols or their negatives can be inexpensively designed as tight-fitting foils that are glued to the back of the light guide plate to achieve the closest possible contact or are designed as adhesive foils. However, they can also be formed as a vapor-deposited coating or molded, in particular milled, into the light guide plate.
  • At least one inclined side wall of the housing and / or the reflective layer on the front surface of the light guide plate and / or the contrast surface is expediently provided with solar cells.
  • the solar cells are illuminated through the light guide plate, for which solar cells are particularly suitable for diffuse light.
  • the housing has a rechargeable battery, to which a charging device operated by the solar cell is assigned.
  • the display unit is expediently provided with a twilight switch which only switches on the lighting elements below a predeterminable external brightness.
  • the display surface is formed by a rectangular, fluorescent light guide plate 10, for example 8 mm thick.
  • Such light guide plates usually consist of clear plastic, which is colored with fluorescent dye or mixed with fluorescent particles.
  • Such light guide plates have the property of emitting absorbed light again by fluorescence. The fluorescence radiation is guided to the boundary edges by total reflection and radiated there in a concentrated manner, unless measures to prevent this are provided. In addition, light is emitted at those points where other bodies come into close contact with the light guide plate.
  • five light-emitting diodes 11 are arranged in corresponding recesses in the light guide plate 10, arranged at regular intervals.
  • the number of LEDs used is of course arbitrary and depends on the desired brightness. In general, a single light emitting diode, for. B. sufficient for a house number if the arrangement described below is provided.
  • the remaining boundary edges can of course also be provided with embedded light-emitting diodes. This is particularly useful with very large light guide plates.
  • a reflective layer 12 In the simplest case, this can consist of an aluminum foil, but it can also be mirrored by coating or vapor deposition. In any case, it proves advantageous to smooth the boundary edges very well, preferably to polish them, before applying the reflective layer 12, so that there is close contact with the reflective layer 12 and good reflectivity.
  • the front and the back of the light guide plate 10 are provided in the region of the light-emitting diodes 1 with a strip-shaped reflective layer 13 in order to prevent direct light emission. This reflecting layer 13 has such an extent that the total reflection on the front and back is retained.
  • the numbers 5 and 3 are applied as display symbols 14. These can either be designed as adhesive films or glued in the form of films. It is essential that there is a very intimate contact with the light guide plate 10, which allows light to escape at the contact points.
  • the display symbols 14 can also be generated by coating, in particular by vapor deposition.
  • the display symbols 14 preferably have a light color so that the light emerging there is absorbed as little as possible.
  • the display symbols illuminated in this way are clearly visible through the transparent light guide plate 10.
  • it is also possible to generate a negative of these display symbols that is to say that the entire rear side of the light guide plate 10 is included provided a close-fitting layer from which only the digits, letters or the like are left blank.
  • the light guide plate 10 is inserted into a box-shaped housing 15, the front wall being formed by the light guide plate 10 itself and the rear wall 16 being a contrast surface at a distance from it.
  • the light guide plate can also be arranged only in the front area of a housing-like display unit and can still be covered by a transparent wall to protect the light guide plate, the cover also being able to extend to the sides.
  • the contrast surface is expediently colored dark, while in the case of display symbols designed as negatives the contrast surface is colored light.
  • An inclined solar cell unit 17 is arranged on the top of the housing 15, a favorable inclination angle, for example, depending on the geographic location, being 70 °.
  • a rechargeable battery 19 and a charging device 20 are arranged in the space 18 formed between the solar cell unit 17 and the housing 15. These can of course also be arranged in the housing 15 and colored according to the contrast surface or provided with a corresponding cover.
  • the display symbols can also be molded, in particular milled, into the light guide plate.
  • the light can emerge from the resulting oblique edges, as a result of which the corresponding display symbols 14 appear brightly.
  • the electrical energy generated in the solar cell unit 17 is supplied to the rechargeable battery 19 for energy storage via the charging device 20, which is designed, for example, as a constant current source. This ensures a constant charging current to protect the battery.
  • the charging device 20 can also be provided with a voltage converter.
  • the battery 19 is connected to the five light-emitting diodes 11 via a twilight switch 21. During the day, this twilight switch 21 is open, so that the battery 19 can be charged without removing current. Only below a predeterminable external brightness, e.g. B.
  • this twilight switch 21 closes, and the LEDs 11 are fed by the battery 19.
  • the current generated by the solar cell unit 17 can be supplied to a threshold device, the light-emitting diodes 11 or a single light-emitting diode being switched on when the value falls below a predefinable threshold value.
  • the twilight switch 21 can also be omitted, or it can be replaced, for example, by a manually operated switch.
  • the light-emitting diodes 11 can also be operated in a conventional manner Low voltage line can be fed from the outside. Since the energy requirement of this display unit is extremely low, the LEDs can then remain switched on at all times, so that switching devices can be dispensed with.
  • the light guide plate 10 can of course also have a different shape, z. B. be round, oval or triangular.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Road Signs Or Road Markings (AREA)
EP88111105A 1987-09-11 1988-07-12 Unité d'affichage éclairée, en particulier numéro de maison, panneau de signalisation ou support de publicité Expired - Lifetime EP0306659B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88111105T ATE98035T1 (de) 1987-09-11 1988-07-12 Beleuchtete anzeigeeinheit, insbesondere hausnummer, verkehrsschild, werbetraeger.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3730591 1987-09-11
DE3730591A DE3730591C1 (de) 1987-09-11 1987-09-11 Beleuchtete Anzeigeeinheit,insbesondere Hausnummer,Verkehrsschild,Werbetraeger

Publications (3)

Publication Number Publication Date
EP0306659A2 true EP0306659A2 (fr) 1989-03-15
EP0306659A3 EP0306659A3 (en) 1990-06-20
EP0306659B1 EP0306659B1 (fr) 1993-12-01

Family

ID=6335824

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88111105A Expired - Lifetime EP0306659B1 (fr) 1987-09-11 1988-07-12 Unité d'affichage éclairée, en particulier numéro de maison, panneau de signalisation ou support de publicité

Country Status (5)

Country Link
US (1) US4903172A (fr)
EP (1) EP0306659B1 (fr)
AT (1) ATE98035T1 (fr)
DE (2) DE3730591C1 (fr)
ES (1) ES2049228T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2653925A1 (fr) * 1989-10-27 1991-05-03 Giol Lucien Dispositif d'affichage a generateur photovoltauique integre.
WO1999003086A1 (fr) * 1997-07-08 1999-01-21 Lisol Scandinavia Ab Moyens d'affichage eclaires
DE19853106A1 (de) * 1998-11-18 2000-05-31 Bayer Ag Fluoreszierende, strukturierte Formkörper
WO2002047055A1 (fr) * 2000-12-04 2002-06-13 Pekka Talstila Panneau indicateur ou publicitaire
KR100354242B1 (ko) * 1995-09-30 2003-03-04 삼성에스디아이 주식회사 자동차번호판

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DE3322393A1 (de) * 1983-06-22 1985-01-10 Data Faktor Ind Products Gmbh Leuchte, insbesondere hauseingangs- oder schummerleuchte
US4573766A (en) * 1983-12-19 1986-03-04 Cordis Corporation LED Staggered back lighting panel for LCD module
SE461305B (sv) * 1984-11-06 1990-01-29 Labino Patent Ab Armatur innefattande en laadformig kropp
DE8437903U1 (de) * 1984-12-22 1986-04-17 Elliger, Peter Leuchtobjekt zur Symbol- und Objektdarstellung für Werbung, Information und Dekoration in Räumen und Schaufenstern, etc.
JPS61127506U (fr) * 1985-01-30 1986-08-11
DE8514941U1 (de) * 1985-05-21 1985-10-24 Jakoby, Rene, Dipl.-Ing., 6900 Heidelberg Schild aus an sich durchsichtigem Kunststoff als Träger von Buchstaben und/oder Bildzeichen
US4715137A (en) * 1986-01-31 1987-12-29 Scheve William J Illuminated display with beaded light-transmitting image
US4782432A (en) * 1986-05-29 1988-11-01 Me Generations Inc. Multi-function light
CA1299157C (fr) * 1986-12-19 1992-04-21 Akira Tanaka Dispositif d'eclairage

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2653925A1 (fr) * 1989-10-27 1991-05-03 Giol Lucien Dispositif d'affichage a generateur photovoltauique integre.
KR100354242B1 (ko) * 1995-09-30 2003-03-04 삼성에스디아이 주식회사 자동차번호판
WO1999003086A1 (fr) * 1997-07-08 1999-01-21 Lisol Scandinavia Ab Moyens d'affichage eclaires
DE19853106A1 (de) * 1998-11-18 2000-05-31 Bayer Ag Fluoreszierende, strukturierte Formkörper
WO2002047055A1 (fr) * 2000-12-04 2002-06-13 Pekka Talstila Panneau indicateur ou publicitaire

Also Published As

Publication number Publication date
US4903172A (en) 1990-02-20
ATE98035T1 (de) 1993-12-15
ES2049228T3 (es) 1994-04-16
DE3730591C1 (de) 1988-07-07
EP0306659B1 (fr) 1993-12-01
DE3885977D1 (de) 1994-01-13
EP0306659A3 (en) 1990-06-20

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