EP2237250A1 - Sign - Google Patents

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Publication number
EP2237250A1
EP2237250A1 EP10157669A EP10157669A EP2237250A1 EP 2237250 A1 EP2237250 A1 EP 2237250A1 EP 10157669 A EP10157669 A EP 10157669A EP 10157669 A EP10157669 A EP 10157669A EP 2237250 A1 EP2237250 A1 EP 2237250A1
Authority
EP
European Patent Office
Prior art keywords
openings
shield according
masks
leds
mask
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
EP10157669A
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German (de)
French (fr)
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EP2237250B1 (en
Inventor
Anton Bettendorf
Herbert Dopfer
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.)
Bremicker Verkehrstechnik & Co KG GmbH
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Bremicker Verkehrstechnik & Co KG GmbH
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Application filed by Bremicker Verkehrstechnik & Co KG GmbH filed Critical Bremicker Verkehrstechnik & Co KG GmbH
Publication of EP2237250A1 publication Critical patent/EP2237250A1/en
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Publication of EP2237250B1 publication Critical patent/EP2237250B1/en
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/09Arrangements for giving variable traffic instructions
    • G08G1/095Traffic lights

Definitions

  • the invention relates to a shield according to the preamble of claim 1.
  • a solution that is improved in comparison, is from the DE 103 05 634 A1 seen.
  • LEDs are supported by an additional shadow mask.
  • This shadow mask is arranged behind the transparent pane, and clearly spaced therefrom, so that special optical effects are achieved.
  • Sun is the effect of sunlight that could reflect on a smooth chip surface, be suppressed, it being assumed that the sunlight is incident obliquely from above, but the light emission of the LED should be obliquely down or straight.
  • the openings in the mask plate, which is arranged in front of the disk, in this solution are significantly larger than the openings in the shadow mask, which correspond to the diameter of the LEDs.
  • the invention is based on the object to provide a shield according to the preamble of claim 1, which allows a better and trouble-free light output in terms of long-term stability and in different weather conditions.
  • the two masks coincide with each other and are mounted on the two sides of the disc.
  • the correspondence does not have to mean an identity, but an optimized form for the light emission, the glare-free and as far as possible elimination of reflections of any incident sunlight, a light output obliquely downwards or even allows, even if the two masks are not so widely spaced, like this from the DE 103 06 631 A1 is apparent.
  • the two masks are in thermal contact with each other via the disk. They may be formed as a thin body, the strength of which is, for example, less than 1/3, preferably less than 1/10 of the thickness of the disc, and in particular even less and which are consistent with each attached to the disc conforming to this flat. They may also be formed in preferred manner as films which are glued or even vapor-deposited on the disc.
  • the ever flat and compact design of the disc with vapor-deposited masks results in a compact body which can be produced inexpensively and which also makes it difficult to adhere to impurities which are disadvantageous, for example, in the additional attachment of ribs or the like.
  • the multi-layer disc according to the invention can also be cleaned extremely easily, for example by wiping or by spraying with a water hose.
  • the thermal expansion coefficient of the film or other masks is always the same as that of the disk. This also makes it possible not to risk distortions of the optical axes under extreme temperature differences, and also that the Do not remove the foils from the glass.
  • the shield according to the invention is therefore extremely durable and is characterized by special optical fidelity even during long operation.
  • the screens are preferably the same for the masks.
  • the front mask may be slightly lowered from the rear mask to facilitate light leakage somewhat obliquely downwards.
  • the openings of the masks can also be slightly larger, as it is in the DE 103 05 631 A1 is indicated, but essentially smaller dimensions, to take into account the light emission angle of the LED chip mutatis mutandis.
  • the openings of both masks are mutually equivalent in shape.
  • the front opening is smaller than the rear opening, in order to ensure an even better glare protection.
  • the pane is additionally connected to a guide element which guides the LEDs as light sources.
  • a "reverse guidanceā€ is basically achieved.
  • the spacing of the LEDs is thus likewise determined indirectly by the pane and thus by the mask openings.
  • the printed circuit board spaced mounting of the LEDs and rather elongated leads enter this, so that not the PCB determines the distance of the LEDs, but the disc and thus the masks.
  • the LEDs are preferably received in the guide elements or guided in any other suitable manner. It is understood that instead of LEDs, other suitable light sources, such as laser diodes or even incandescent lamps can be used, for cost reasons a possible low-priced type of light source is desired in relation to the light output. Inexpensive should also include the maintenance costs here.
  • the openings in the masks do not have to be circular. They may also be elliptical or circular-segment-shaped, wherein it is preferred to provide the edge of the circle at the top, so that the dazzling light output is prevented or restricted in an exactly horizontal direction.
  • a shield 10 has a front plate 12, which in turn has a disk 14.
  • the disk 14 is covered by a front mask 16 which has recesses or openings, for example the openings 18.
  • the openings are arranged in a regular grid and extend in the illustrated embodiment over the entire front side of the front panel 12th
  • the front plate 12 is supported by a frame 20 of the shield and forms together with this a liquid-tight hollow body.
  • light sources are included, as will be apparent from the following explanation.
  • FIG. 1 shows front panel 12 has in addition to the mask 16 on its back on a similar mask, as it for example Fig. 5 is apparent.
  • the masks are preferably formed as black films that leave the openings 18. Such films can also be applied by vapor deposition or printing or in any suitable manner, for example also in a rapid prototyping technique. Instead of leaving the openings 18 transparent or translucent areas can be applied additionally at this point.
  • the thickness of the mask is chosen to be extremely small and is, for example, 10 to 50 micrometers, or even less, the thickness being chosen as small as possible without impairing the durability and the lack of transparency.
  • a light source such as an LED. This results in a matrix of LEDs, which can each be controlled separately to signal a symbol.
  • the diameter of the openings 18 is significantly less than the distance 22 between them.
  • the diameter of the openings 18 is 5mm, and the pitch of the openings 18 is 20mm, so that the distance 22 between adjacent openings in both the vertical and in the horizontal direction is 15mm. It is understood that these dimensions are widely adaptable to the requirements.
  • the inventive design of the front panel 12 also allows to work close to the edge, so the openings 18 in the mask 16 also to provide immediately adjacent to the frame 20.
  • a square panel or shield member is shown having circular apertures 18, it should be understood that any other geometric shapes are readily feasible as well, with a square shape having the advantage of being modular, that is, providing an overall larger one Shield can be used.
  • the shield 10 according to the invention may be liquid-tight or at least splash-proof. Due to the closed structure, which also takes into account the thermal expansion, it is possible, in combination with a molded transformer, to realize a high protection class, such as, for example, protection class II or III.
  • FIG. 3 Another possibility of the arrangement of openings 18 in the mask 16 is made Fig. 3 seen.
  • the film 16 forming the mask is provided with openings 18, which show together a speed limit sign with a recorded 40.
  • This shield is designed so that all the LEDs for the backlighting of the openings 18 can be switched on and off at the same time.
  • the distance between the distance 22 between individual openings 18 is significantly smaller, and in some cases some overlaps of the openings are realized with each other, which results in the associated LEDs abutting each other.
  • Fig. 4 it can be seen how a shield 10 is constructed internally.
  • the frame 20 receives the front panel 12, which consists of the disc 14, the mask 16 and mask 24.
  • the masks 16 and 24 are formed to match each other and made by printing on the transparent plate 14.
  • films for the masks 16 and 24, which are then glued on and transparent regions for the realization of the openings 18 leave are conveniently glued and preferably have the same coefficient of thermal expansion as the Scheibe14.
  • a guide device 26 is provided, which is thermally and positively connected to the mask 24 and thus to the disk 14.
  • the guide device 26 determines the exact position of LEDs 28, which are each inserted into recesses 30 in the guide device 26.
  • the LEDs 28 are connected via connecting wires 32 to a printed circuit board 34.
  • the lead wires 32 are flexible to some extent, so that the exact position of each LED 28 is determined by the recess 30 in the guide device 26 and not by the printed circuit board. This results in a "entrainment" of the LEDs upon expansion of the disc 14, as can be done by the heating of the LEDs. Due to the large area of concern, the guide device 26 is heated to substantially the same temperature as the disc 14, it being understood that the thermal expansion coefficient of the guide device 26 is preferably adapted to that of the disc 14.
  • Fig. 5 is the partial structure of a sign according to the invention can be seen. Like reference numerals indicate similar parts here as well as in the other figures. It can be seen that the light exit angle is essentially determined by the distance between the light source of the LED 28 and the opening 18 in the mask 16. However, the contrast effect and external light immunity is significantly higher when the mask 24, as provided for in the invention, is used. Nevertheless, thermal errors do not arise for the known reasons, wherein Fig. 5 It can be seen that it is harmless if a small gap between the guide member 26 and the mask 24 remains.
  • the LED does not project beyond the guide element 26, but terminates substantially flush with the guide element 26 at the front. As a result, there is also a small distance between the LED and the disc 14, which prevents excessive selective heating of the disc 14.
  • the connecting wires 32 paired with the printed circuit board 34 additionally serve for heat dissipation for the hot LED chip.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

The signboard (10) has a front plate (12) comprising masks (16), via which translucent areas are separated from non-translucent areas. The translucent areas are provided in a transparent disk (14), and the masks are attached on a side of the disk, where the side is distanced from light sources e.g. LEDs or laser diodes. Additional masks coincide with the former masks, and are attached on another side of the disk, where the latter side is adjacent to the light sources. The LEDs are designed as surface mounted device-chips, and the masks are designed as black foils.

Description

Die Erfindung betrifft ein Schild gemƤƟ dem Oberbegriff von Anspruch 1.The invention relates to a shield according to the preamble of claim 1.

Schilder, bei denen die Frontplatte Masken aufweist, die den Lichtdurchtritt steuern, sind seit langem bekannt. Mit den Masken werden entweder Symbole festgelegt, oder die Masken lassen Ɩffnungen in einem bestimmten Muster frei, die dahinter angeordneten Lichtquellen, beispielsweise LEDs, den Lichtdurchtritt ermƶglichen. Derartige Masken sollen insofern einen prƤzisen Lichtaustritt mit geringer Blendneigung ermƶglichen.Signs in which the front panel has masks that control the passage of light, have long been known. The masks either set icons, or the masks leave openings in a particular pattern free, the light sources behind them, such as LEDs, allow the passage of light. Such masks should allow a precise light emission with low tendency to glare.

Eine Lƶsung, die demgegenĆ¼ber verbessert ist, ist aus der DE 103 05 634 A1 ersichtlich. Bei dieser Lƶsung sind LEDs von einer zusƤtzlichen Lochmaske abgestĆ¼tzt. Diese Lochmaske ist hinter der transparenten Scheibe angeordnet, und deutlich von dieser beabstandet, damit besondere optische Wirkungen erzielt werden. So soll die Wirkung von Sonnenlicht, das auf einer glatten Chip-OberflƤche spiegeln kƶnnte, unterbunden werden, wobei davon ausgegangen wird, dass das Sonnenlicht schrƤg von oben einfƤllt, der Lichtaustritt der LED aber schrƤg nach unten oder gerade erfolgen sollte. Die Ɩffnungen in der Maskenplatte, die vor der Scheibe angeordnet ist, sind bei dieser Lƶsung deutlich grĆ¶ĆŸer als die Ɩffnungen in der Lochmaske, die dem Durchmesser der LEDs entsprechen.A solution that is improved in comparison, is from the DE 103 05 634 A1 seen. In this solution, LEDs are supported by an additional shadow mask. This shadow mask is arranged behind the transparent pane, and clearly spaced therefrom, so that special optical effects are achieved. Sun is the effect of sunlight that could reflect on a smooth chip surface, be suppressed, it being assumed that the sunlight is incident obliquely from above, but the light emission of the LED should be obliquely down or straight. The openings in the mask plate, which is arranged in front of the disk, in this solution are significantly larger than the openings in the shadow mask, which correspond to the diameter of the LEDs.

Diese Lƶsung ist zwar im Grunde fĆ¼r kleinere Schilder gut geeignet. Bei grĆ¶ĆŸeren Schildern ist sie jedoch nicht ganz befriedigend. Gerade sehr helle LEDs, deren Verwendung angestrebt wird, haben eine erhebliche WƤrmeabgabe, wobei durch die Sonneneinstrahlung das Verkehrsschild erwƤrmt wird. Durch die WƤrmeabgabe erwƤrmt sich auch die Lochmaske, die sich dementsprechend ausdehnt. Dies fĆ¼hrt zur Ausrichtung- und Parallaxenfehlern zwischen den Ɩffnungen, so dass die an sich technisch mƶglich exakte Festlegung der optischen Achse hierdurch untergraben wird.This solution is basically well suited for smaller signs. For larger signs, however, it is not quite satisfactory. Especially very bright LEDs, the use of which is sought, have a significant heat dissipation, the road sign is heated by the sunlight. Due to the heat release, the shadow mask also warms up and expands accordingly. This leads to alignment and parallax errors between the openings, so that the per se technically possible exact fixing of the optical axis is thereby undermined.

Dies gilt im besonderen Masse fĆ¼r Schilder, die nachts ausgeschaltet sind und dann abkĆ¼hlen. Zwar kƶnnte man die Lochmaske auf dem "Warmzustand" dimensionieren. Dies fĆ¼hrt jedoch dann zu optischen Fehlern, wenn die Lochmaske noch nicht erwƤrmt ist, also beispielsweise durchaus in den ersten Stunden nach dem Einschalten des Schildes, und gerade bei kalter Witterung, da dann der Temperaturgradient innerhalb des Schildes besonders hoch ist.This is especially true for signs that are off at night and then cool. Although you could dimension the shadow mask on the "warm state". However, this leads to optical errors when the shadow mask is not heated, so for example, certainly in the first hours after switching on the shield, and especially in cold weather, since then the temperature gradient within the shield is particularly high.

Ferner ist es bereits vorgeschlagen worden, separate Platten mit Lƶchern vorzusehen, die sich vor und hinter einer Scheibe erstrecken. Wenn die LEDs bei der hinteren Lochplatte angeordnet sind, erwƤrmt sich diese, so dass der vorstehend genannte nachteilige Effekt in gleicher Weise auftritt.Furthermore, it has already been proposed to provide separate plates with holes extending in front of and behind a disc. When the LEDs are arranged at the back hole plate, it heats up, so that the above-mentioned adverse effect occurs in the same way.

Daher liegt der Erfindung die Aufgabe zu Grunde, ein Schild gemƤƟ Oberbegriff von Anspruch 1 zu schaffen, das hinsichtlich der LangzeitstabilitƤt und auch bei unterschiedlichen Witterungsbedingungen eine bessere und stƶrungsfreie Lichtabgabe ermƶglicht.Therefore, the invention is based on the object to provide a shield according to the preamble of claim 1, which allows a better and trouble-free light output in terms of long-term stability and in different weather conditions.

Diese Aufgabe wird erfindungsgemƤƟ durch Anspruch 1 gelƶst. Vorteilhafte Weiterbildungen ergeben sich aus den UnteransprĆ¼chen.This object is achieved by claim 1. Advantageous developments emerge from the subclaims.

ErfindungsgemƤƟ ist es vorgesehen, dass die beiden Masken miteinander Ć¼bereinstimmen und auf den beiden Seiten der Scheibe angebracht sind. Die Ɯbereinstimmung muss hierbei nicht eine IdentitƤt bedeuten, sondern eine fĆ¼r die Lichtabgabe optimierte Form, die blendfrei und unter mƶglichst weitgehender Ausschaltung von Reflexionen des etwaigen einfallenden Sonnenlichts eine Lichtabgabe schrƤg nach unten oder gerade ermƶglicht, auch wenn die beiden Masken nicht so stark beabstandet sind, wie dies aus der DE 103 06 631 A1 ersichtlich ist.According to the invention, it is provided that the two masks coincide with each other and are mounted on the two sides of the disc. The correspondence here does not have to mean an identity, but an optimized form for the light emission, the glare-free and as far as possible elimination of reflections of any incident sunlight, a light output obliquely downwards or even allows, even if the two masks are not so widely spaced, like this from the DE 103 06 631 A1 is apparent.

Besonders gĆ¼nstig ist es hierbei, dass die beiden Masken Ć¼ber die Scheibe zueinander im thermischen Kontakt sind. Sie kƶnnen als dĆ¼nne Kƶrper ausgebildet sein, deren StƤrke beispielsweise weniger als 1/3, bevorzugt weniger als 1/10 der StƤrke der Scheibe, und insbesondere noch weniger betrƤgt und die miteinander Ć¼bereinstimmend je sich flach an die Scheibe anschmiegend an diese angebracht sind. Sie kƶnnen auch in bevorzugterweise als Folien ausgebildet sein, die auf die auf Scheibe aufgeklebt oder sogar aufgedampft sind.It is particularly favorable in this case that the two masks are in thermal contact with each other via the disk. They may be formed as a thin body, the strength of which is, for example, less than 1/3, preferably less than 1/10 of the thickness of the disc, and in particular even less and which are consistent with each attached to the disc conforming to this flat. They may also be formed in preferred manner as films which are glued or even vapor-deposited on the disc.

Durch die je flache und kompakte Ausgestaltung der Scheibe mit beispielsweise aufgedampften Masken entsteht ein kompakter und preisgĆ¼nstig herstellbarer Kƶrper, der auch das Anhaften von Unreinigungen erschwert, die beispielsweise bei dem zusƤtzlichen Anbringen von Rippen oder dergleichen nachteilig sind. Die erfindungsgemƤƟe Mehrschichtscheibe lƤsst sich auch ausgesprochen leicht reinigen, beispielsweise abwischen oder auch mit einem Wasserschlauch abspritzen.The ever flat and compact design of the disc with vapor-deposited masks, for example, results in a compact body which can be produced inexpensively and which also makes it difficult to adhere to impurities which are disadvantageous, for example, in the additional attachment of ribs or the like. The multi-layer disc according to the invention can also be cleaned extremely easily, for example by wiping or by spraying with a water hose.

Bevorzugt ist der WƤrmeausdehnungskoeffizient der Folie oder der sonstigen Masken je gleich wie derjenige der Scheibe. Dies erlaubt es auch, bei extremen Temperaturunterschieden keine Verzerrungen der optischen Achsen zu riskieren, und auch, dass sich die Folien nicht von der Scheibe ablƶsen. Das erfindungsgemƤƟe Schild ist daher ausgesprochen langlebig und fƤllt durch besondere optische Treue auch bei langem Betrieb auf.Preferably, the thermal expansion coefficient of the film or other masks is always the same as that of the disk. This also makes it possible not to risk distortions of the optical axes under extreme temperature differences, and also that the Do not remove the foils from the glass. The shield according to the invention is therefore extremely durable and is characterized by special optical fidelity even during long operation.

Es versteht sich, dass die Raster bei den Masken bevorzugt gleich sind. Die vordere Maske kann gegenĆ¼ber der hinteren Maske leicht abgesenkt sein, um einen Lichtaustritt etwas schrƤg nach unten zu erleichtern. Die Ɩffnungen der Masken kƶnnen auch minimal grĆ¶ĆŸer sein, wie es auch in der DE 103 05 631 A1 angedeutet ist, jedoch im Wesentlich geringeren MaƟe, um dem Lichtaustrittwinkel des LED-Chips sinngemƤƟ Rechnung zu tragen.It is understood that the screens are preferably the same for the masks. The front mask may be slightly lowered from the rear mask to facilitate light leakage somewhat obliquely downwards. The openings of the masks can also be slightly larger, as it is in the DE 103 05 631 A1 is indicated, but essentially smaller dimensions, to take into account the light emission angle of the LED chip mutatis mutandis.

Insofern ist es gĆ¼nstig, wenn die Ɩffnungen beider Masken zueinander formƤquivalent sind. In modifizierter Ausgestaltung ist es vorgesehen, dass die vordere Ɩffnung je kleiner als die hintere Ɩffnung ist, um eine noch bessere Blendsicherung zu gewƤhrleisten.In this respect, it is favorable if the openings of both masks are mutually equivalent in shape. In a modified embodiment, it is provided that the front opening is smaller than the rear opening, in order to ensure an even better glare protection.

ErfindungsgemƤƟ besonders gĆ¼nstig ist es, wenn die Scheibe zusƤtzlich mit einem FĆ¼hrungselement verbunden ist, das die LEDs als Lichtquellen fĆ¼hren. Hierdurch wird im Grunde eine "umgekehrte FĆ¼hrung" erreicht. Der Abstand der LEDs wird so ebenfalls indirekt durch die Scheibe und damit durch die Maskenƶffnungen festgelegt. Bei entsprechender, der Printplatte beabstandeten Montage der LEDs und eher lƤnglichen AnschlussdrƤhten geben diese nach, so dass nicht die Printplatte den Abstand der LEDs festlegt, sondern die Scheibe und damit die Masken.According to the invention, it is particularly favorable if the pane is additionally connected to a guide element which guides the LEDs as light sources. As a result, a "reverse guidance" is basically achieved. The spacing of the LEDs is thus likewise determined indirectly by the pane and thus by the mask openings. With appropriate, the printed circuit board spaced mounting of the LEDs and rather elongated leads enter this, so that not the PCB determines the distance of the LEDs, but the disc and thus the masks.

Alternativ ist es auch mƶglich, die Printplatte aufzuteilen und mehrere kleine Printplatten je separat fĆ¼hren zu lassen, was es ermƶglicht, auch mit kurzen AnschlussdrƤhten zu arbeiten.Alternatively, it is also possible to divide the printed circuit board and to let run several small printed circuit boards separately, which makes it possible to work with short connecting wires.

Die LEDs sind bevorzugt in den FĆ¼hrungselementen aufgenommen oder in sonstiger geeignete Weise gefĆ¼hrt. Es versteht sich, dass anstelle von LEDs auch andere geeignete Lichtquellen, wie beispielsweise Laserdioden oder sogar GlĆ¼hlampen eingesetzt werden kƶnnen, wobei aus KostengrĆ¼nden eine mƶglichst preisgĆ¼nstige Art der Lichtquelle im VerhƤltnis zur Lichtabgabe angestrebt ist. PreisgĆ¼nstig soll hier auch die Wartungskosten mit einbeziehen.The LEDs are preferably received in the guide elements or guided in any other suitable manner. It is understood that instead of LEDs, other suitable light sources, such as laser diodes or even incandescent lamps can be used, for cost reasons a possible low-priced type of light source is desired in relation to the light output. Inexpensive should also include the maintenance costs here.

Die Ɩffnungen in den Masken mĆ¼ssen keineswegs kreisrund sein. Sie kƶnnen auch elliptisch oder kreisabschnittsfƶrmig ausgebildet sein, wobei es bevorzugt ist, die Kante des Kreises je oben vorzusehen, so dass die blendende Lichtabgabe in exakt horizontaler Richtung unterbunden oder eingeschrƤnkt wird.The openings in the masks do not have to be circular. They may also be elliptical or circular-segment-shaped, wherein it is preferred to provide the edge of the circle at the top, so that the dazzling light output is prevented or restricted in an exactly horizontal direction.

Weitere Vorteile, Einzelheiten und Merkmale ergeben sich aus der nachfolgenden Beschreibung eines AusfĆ¼hrungsbeispiels anhand der Zeichnung. Es zeigen:

Fig. 1
eine schematische perspektivische Ansicht einer AusfĆ¼hrungsform eines erfindungsgemƤƟen Schilds;
Fig. 2
eine schematische Ansicht einer AusfĆ¼hrungsform eines erfindungsgemƤƟen Schilds;
Fig. 3
eine schematische Ansicht des Musters einer Maske fĆ¼r eine weitere AusfĆ¼hrungsform eines erfindungsgemƤƟen Schilds;
Fig. 4
ein Schnitt durch eine AusfĆ¼hrungsform eines erfindungsgemƤƟen Schilds; und
Fig. 5
eine vergrĆ¶ĆŸerte Ansicht eines Details eines erfindungsgemƤƟen Schilds, unter Darstellung einer LED, eines Teils der Scheibe und der Masken.
Further advantages, details and features will become apparent from the following description of an embodiment with reference to the drawing. Show it:
Fig. 1
a schematic perspective view of an embodiment of a shield according to the invention;
Fig. 2
a schematic view of an embodiment of a shield according to the invention;
Fig. 3
a schematic view of the pattern of a mask for a further embodiment of a shield according to the invention;
Fig. 4
a section through an embodiment of a shield according to the invention; and
Fig. 5
an enlarged view of a detail of a shield according to the invention, showing an LED, a part of the disc and the masks.

GemƤƟ der Darstellung in Fig. 1 weist ein Schild 10 eine Frontplatte 12 auf, die ihrerseits eine Scheibe 14 aufweist. Die Scheibe 14 ist von einer vorderen Maske 16 abgedeckt, die Aussparungen oder Ɩffnungen, beispielsweise die Ɩffnungen 18 aufweist. Die Ɩffnungen sind in einem regelmƤƟigen Raster angeordnet und erstrecken sich in der dargestellten AusfĆ¼hrungsform Ć¼ber die gesamte Vorderseite der Frontplatte 12.As shown in Fig. 1 For example, a shield 10 has a front plate 12, which in turn has a disk 14. The disk 14 is covered by a front mask 16 which has recesses or openings, for example the openings 18. The openings are arranged in a regular grid and extend in the illustrated embodiment over the entire front side of the front panel 12th

Die Frontplatte 12 wird von einem Rahmen 20 des Schilds getragen und bildet mit diesem zusammen einen flĆ¼ssigkeitsdichten Hohlkƶrper. In dem Hohlkƶrper sind Lichtquellen aufgenommen, wie es sich aus der nachstehenden ErlƤuterung ergibt.The front plate 12 is supported by a frame 20 of the shield and forms together with this a liquid-tight hollow body. In the hollow body light sources are included, as will be apparent from the following explanation.

Die in Fig. 1 und schematisch auch in Fig. 2 dargestellte Frontplatte 12 weist neben der Maske 16 auf ihrer RĆ¼ckseite eine gleichartige Maske auf, wie es beispielsweise aus Fig. 5 ersichtlich ist. Die Masken sind bevorzugt als Schwarzfolien ausgebildet, die die Ɩffnungen 18 belassen. Derartige Folien kƶnnen auch durch Aufdampfen oder Drucken oder in beliebiger geeigneter Weise aufgebracht werden, beispielsweise auch in einer Rapid-Prototyping-Technik. Anstelle des Belassens der Ɩffnungen 18 kƶnnen auch an dieser Stelle durchsichtige oder durchscheinende Bereiche zusƤtzlich aufgebracht sein. Die Dicke der Maske ist ausgesprochen gering gewƤhlt und betrƤgt beispielsweise 10 bis 50 Mikrometer, oder sogar weniger, wobei die Dicke mƶglichst gering gewƤhlt wird, ohne die Dauerhaltbarkeit und Intransparenz zu beeintrƤchtigen.In the Fig. 1 and schematically also in Fig. 2 shown front panel 12 has in addition to the mask 16 on its back on a similar mask, as it for example Fig. 5 is apparent. The masks are preferably formed as black films that leave the openings 18. Such films can also be applied by vapor deposition or printing or in any suitable manner, for example also in a rapid prototyping technique. Instead of leaving the openings 18 transparent or translucent areas can be applied additionally at this point. The thickness of the mask is chosen to be extremely small and is, for example, 10 to 50 micrometers, or even less, the thickness being chosen as small as possible without impairing the durability and the lack of transparency.

Hinter jeder der Ɩffnungen 18 erstreckt sich eine Lichtquelle, beispielsweise eine LED. Es ergibt sich insofern eine Matrix von LEDs, die je getrennt angesteuert werden kƶnnen, um ein Symbol zu signalisieren.Behind each of the openings 18 extends a light source, such as an LED. This results in a matrix of LEDs, which can each be controlled separately to signal a symbol.

Wie aus Fig. 2 ferner ersichtlich ist, betrƤgt der Durchmesser der Ɩffnungen 18 deutlich weniger als der Abstand 22 zwischen diesen. Im Beispielsfall betrƤgt der Durchmesser der Ɩffnungen 18 5mm, und das Rastermass der Ɩffnungen 18 20mm, so dass der Abstand 22 zwischen einander benachbarten Ɩffnungen sowohl in vertikaler als auch in horizontaler Richtung 15mm betrƤgt. Es versteht sich, dass diese MaƟe in weiten Bereich an die Erfordernisse anpassbar sind.How out Fig. 2 Furthermore, it can be seen, the diameter of the openings 18 is significantly less than the distance 22 between them. In the example, the diameter of the openings 18 is 5mm, and the pitch of the openings 18 is 20mm, so that the distance 22 between adjacent openings in both the vertical and in the horizontal direction is 15mm. It is understood that these dimensions are widely adaptable to the requirements.

Die erfindungsgemƤƟe Ausgestaltung der Frontplatte 12 gestattet es auch, randnah zu arbeiten, also die Ɩffnungen 18 in der Maske 16 auch unmittelbar angrenzend an den Rahmen 20 vorzusehen. Auch wenn im vorliegenden Fall ein quadratisches Panel oder Schildelement dargestellt ist, das kreisrunde Ɩffnungen 18 aufweist, versteht es sich, dass beliebige andere geometrische Formen ohne Weiteres ebenso realisierbar sind, wobei eine quadratische Form den Vorteil hat, modular, also zur Bereitstellung eines insgesamt grĆ¶ĆŸeren Schildes eingesetzt werden kƶnnen.The inventive design of the front panel 12 also allows to work close to the edge, so the openings 18 in the mask 16 also to provide immediately adjacent to the frame 20. Although in the present case a square panel or shield member is shown having circular apertures 18, it should be understood that any other geometric shapes are readily feasible as well, with a square shape having the advantage of being modular, that is, providing an overall larger one Shield can be used.

Das erfindungsgemƤƟe Schild 10 kann flĆ¼ssigkeitsdicht sein oder ist zumindest spritzwassergeschĆ¼tzt. Durch den geschlossenen Aufbau, der auch die thermische Ausdehnung berĆ¼cksichtigt, ist es mƶglich, in Kombination mit einem vergossenen Transformator eine hohe Schutzklasse, wie beispielsweise Schutzklasse II oder III, zu realisieren.The shield 10 according to the invention may be liquid-tight or at least splash-proof. Due to the closed structure, which also takes into account the thermal expansion, it is possible, in combination with a molded transformer, to realize a high protection class, such as, for example, protection class II or III.

Eine weitere Mƶglichkeit der Anordnung von Ɩffnungen 18 in der Maske 16 ist aus Fig. 3 ersichtlich. Dort ist die die Maske 16 bildende Folie mit Ɩffnungen 18 versehen, die in Zusammenschau ein Geschwindigkeitsbegrenzungsschild mit einer aufgenommenen 40 zeigen. Dieses Schild ist so ausgelegt, dass alle LEDs fĆ¼r die Hinterleuchtung der Ɩffnungen 18 gleichzeitig eingeschaltet und ausgeschaltet werden kƶnnen.Another possibility of the arrangement of openings 18 in the mask 16 is made Fig. 3 seen. There, the film 16 forming the mask is provided with openings 18, which show together a speed limit sign with a recorded 40. This shield is designed so that all the LEDs for the backlighting of the openings 18 can be switched on and off at the same time.

In diesem Beispielsfall ist der Abstand zwischen Abstand 22 zwischen einzelnen Ɩffnungen 18 deutlich geringer, wobei teilweise auch einige Ɯberlappungen der Ɩffnungen miteinander realisiert sind, was dazu fĆ¼hrt, dass die zugehƶrigen LEDs aneinander anliegen.In this example, the distance between the distance 22 between individual openings 18 is significantly smaller, and in some cases some overlaps of the openings are realized with each other, which results in the associated LEDs abutting each other.

Aus Fig. 4 ist ersichtlich, in welcher Weise ein Schild 10 innen aufgebaut ist. Der Rahmen 20 nimmt die Frontplatte 12 auf, die aus der Scheibe 14, der Maske 16 und Maske 24 besteht. Die Masken 16 und 24 sind passend zueinander ausgebildet und durch Drucken auf die transparente Scheibe 14 herstellt.Out Fig. 4 it can be seen how a shield 10 is constructed internally. The frame 20 receives the front panel 12, which consists of the disc 14, the mask 16 and mask 24. The masks 16 and 24 are formed to match each other and made by printing on the transparent plate 14.

Durch das Bedrucken ist sicher gestellt, dass die Scheibe 14 fest mit den Masken 16 und 24 verbunden ist und auch das gleiche Temperaturniveau hat.By printing is ensured that the disc 14 is firmly connected to the masks 16 and 24 and also has the same temperature level.

Anstelle dessen kƶnnen aber auch Folien fĆ¼r die Masken 16 und 24 verwendet werden, die dann aufgeklebt sind und transparente Bereiche fĆ¼r die Realisierung der Ɩffnungen 18 belassen. Derartige Folien sind zweckmƤƟig aufgeklebt und haben bevorzugt den gleichen WƤrmeausdehnungskoeffizient wie die Scheibe14.Instead, however, it is also possible to use films for the masks 16 and 24, which are then glued on and transparent regions for the realization of the openings 18 leave. Such films are conveniently glued and preferably have the same coefficient of thermal expansion as the Scheibe14.

ErfindungsgemƤƟ besonders gĆ¼nstig ist es, wenn unmittelbar anschlieƟend an die Maske 24 eine FĆ¼hrungsvorrichtung 26 vorgesehen ist, die thermisch und formschlĆ¼ssig mit der Maske 24 und damit der Scheibe 14 verbunden ist.According to the invention, it is particularly favorable if, immediately following the mask 24, a guide device 26 is provided, which is thermally and positively connected to the mask 24 and thus to the disk 14.

Die FĆ¼hrungsvorrichtung 26 legt die exakte Position von LEDs 28 fest, die je in Ausnehmungen 30 in die FĆ¼hrungsvorrichtung 26 eingesteckt sind.The guide device 26 determines the exact position of LEDs 28, which are each inserted into recesses 30 in the guide device 26.

Die LEDs 28 sind Ć¼ber AnschlussdrƤhte 32 mit einer Printplatte 34 verbunden. Die AnschlussdrƤhte 32 sind im gewissen MaƟe biegsam, so dass die exakte Position jeder LED 28 durch die Ausnehmung 30 in der FĆ¼hrungsvorrichtung 26 und nicht durch Printplatte festgelegt ist. Hierdurch erfolgt eine "MitfĆ¼hrung" der LEDs bei Ausdehnung der Scheibe 14, wie sie durch die ErwƤrmung der LEDs erfolgen kann. Durch das groƟflƤchige Anliegen erwƤrmt sich die FĆ¼hrungsvorrichtung 26 im Wesentlichen auf die gleiche Temperatur wie die Scheibe 14, wobei es sich versteht, dass der WƤrmeausdehnungskoeffizient auch der FĆ¼hrungsvorrichtung 26 bevorzugt an denjenigen der Scheibe 14 angepasst ist.The LEDs 28 are connected via connecting wires 32 to a printed circuit board 34. The lead wires 32 are flexible to some extent, so that the exact position of each LED 28 is determined by the recess 30 in the guide device 26 and not by the printed circuit board. This results in a "entrainment" of the LEDs upon expansion of the disc 14, as can be done by the heating of the LEDs. Due to the large area of concern, the guide device 26 is heated to substantially the same temperature as the disc 14, it being understood that the thermal expansion coefficient of the guide device 26 is preferably adapted to that of the disc 14.

Aus Fig. 5 ist der Teilaufbau eines erfindungsgemƤƟen Schilds ersichtlich. Gleiche Bezugszeichen weisen hier wie auch in den weiteren Figuren auf gleiche Teile hin. Es ist ersichtlich, dass der Lichtaustrittwinkel im Wesentlichen durch den Abstand zwischen der Lichtquelle der LED 28 und der Ɩffnung 18 in der Maske 16 bestimmt wird. Jedoch ist die Kontrastwirkung und Fremdlichtunempfindlichkeit deutlich hƶher, wenn die Maske 24, wie es erfindungsgemƤƟ vorgesehen ist, eingesetzt wird. Thermische Fehler entstehen aus den bekannten GrĆ¼nden dennoch nicht, wobei aus Fig. 5 ersichtlich ist, dass es unschƤdlich ist, wenn ein kleiner Spalt zwischen dem FĆ¼hrungselement 26 und der Maske 24 verbleibt.Out Fig. 5 is the partial structure of a sign according to the invention can be seen. Like reference numerals indicate similar parts here as well as in the other figures. It can be seen that the light exit angle is essentially determined by the distance between the light source of the LED 28 and the opening 18 in the mask 16. However, the contrast effect and external light immunity is significantly higher when the mask 24, as provided for in the invention, is used. Nevertheless, thermal errors do not arise for the known reasons, wherein Fig. 5 It can be seen that it is harmless if a small gap between the guide member 26 and the mask 24 remains.

Es ist ersichtlich, dass bei dieser AusfĆ¼hrungsform die LED das FĆ¼hrungselement 26 nicht Ć¼berragt, sondern im Wesentlichen bĆ¼ndig mit dem FĆ¼hrungselement 26 vorne abschlieƟt. Hierdurch besteht auch ein geringer Abstand zwischen der LED und der Scheibe 14, der ein zu starkes punktuelles Erhitzen der Scheibe 14 verhindert.It can be seen that in this embodiment, the LED does not project beyond the guide element 26, but terminates substantially flush with the guide element 26 at the front. As a result, there is also a small distance between the LED and the disc 14, which prevents excessive selective heating of the disc 14.

In an sich bekannter Weise dienen die AnschlussdrƤhte 32 gepaart mit der Printplatte 34 zusƤtzlich der WƤrmeabfuhr fĆ¼r den heiƟen LED-Chip.In a manner known per se, the connecting wires 32 paired with the printed circuit board 34 additionally serve for heat dissipation for the hot LED chip.

Claims (15)

Schild, das einen Rahmen sowie eine Frontplatte aufweist, die in dem Rahmen gehalten ist, wobei die Frontplatte mindestens teilweise lichtdurchlƤssig ist und mindestens eine Maske aufweist, Ć¼ber welche lichtdurchlƤssige Bereiche von lichtundurchlƤssigen Bereichen getrennt sind und welche die Grenzen dieser festlegt, und wobei die lichtdurchlƤssigen Bereiche in einer transparenten Scheibe festgelegt sind, und die Maske auf der von den Lichtquellen beabstandeten Seite der Scheibe angebracht ist, dadurch gekennzeichnet, dass eine weitere Maske (16), die mit der ersten Maske (16) Ć¼bereinstimmt, auf der der Lichtquelle benachbarten Seite der Scheibe (14) angebracht ist.A sign comprising a frame and a faceplate retained in the frame, the faceplate being at least partially translucent and having at least one mask over which translucent areas are separated from opaque areas and defining the boundaries thereof, and wherein the translucent ones Areas are defined in a transparent disc, and the mask is mounted on the side of the disc spaced from the light sources, characterized in that a further mask (16), which coincides with the first mask (16), on the side adjacent to the light source the disc (14) is mounted. Schild nach Anspruch 1, dadurch gekennzeichnet, dass die beiden Masken (16, 24) im thermischen Kontakt mit der Scheibe (14) angebracht sind, und insbesondere mit dieser fest verbunden sind.Shield according to claim 1, characterized in that the two masks (16, 24) are mounted in thermal contact with the disc (14), and are in particular fixedly connected thereto. Schild nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die erste und die zweite Maske (16, 24) mindestend zwischen jedem dritten lichtdurchlƤssigen Bereich mit der Scheibe (14) fest verbunden sind, bevorzugt zwischen allen lichtdurchlƤssigen Bereichen, und insbesondere durch Kleben oder Formschluss.Shield according to claim 1 or 2, characterized in that the first and the second mask (16, 24) at least between each third translucent area with the disc (14) are firmly connected, preferably between all light-transmissive areas, and in particular by gluing or positive engagement , Schild nach Anspruch 1, dadurch gekennzeichnet, dass die Masken (16, 24) je Ɩffnungen (18), insbesondere kreisrunde oder lƤngliche Ɩffnungen (18) aufweisen, und dass die Ɩffnungen (18) beider Masken (16, 24) zueinander kongruent sind.Shield according to claim 1, characterized in that the masks (16, 24) per openings (18), in particular circular or elongated openings (18), and that the openings (18) of both masks (16, 24) are congruent to each other. Schild nach einem der vorhergehenden AnsprĆ¼che, dadurch gekennzeichnet, dass die Ɩffnungen (18) beider Masken (16, 24) einander formƤquivalent sind und insbesondere im Wesentlichen die gleiche GrĆ¶ĆŸe haben.Shield according to one of the preceding claims, characterized in that the openings (18) of both masks (16, 24) are mutually equivalent in shape and in particular have substantially the same size. Schild nach einem der vorhergehenden AnsprĆ¼che, dadurch gekennzeichnet, dass die Ɩffnungen (18) beider Masken (16, 24) zueinander formƤquivalent sind und die vordere Ɩffnung grĆ¶ĆŸer als die hintere Ɩffnung, also die der Lichtquelle benachbarte Ɩffnung ist.Shield according to one of the preceding claims, characterized in that the openings (18) of both masks (16, 24) are mutually equivalent to form and the front opening is larger than the rear opening, that is, the opening adjacent to the light source. Schild nach einem der AnsprĆ¼che 1 bis 5, dadurch gekennzeichnet, dass die Ɩffnungen (18) zueinander formƤquivalent sind und die vordere Ɩffnung kleiner als die hintere Ɩffnung ist und insbesondere, dass die Ɩffnungen (18) beider Masken (16, 24) auf der gleichen optischen Achse liegen.Shield according to one of claims 1 to 5, characterized in that the openings (18) are mutually equivalent in form and the front opening is smaller than the rear opening and in particular that the openings (18) of both masks (16, 24) on the same optical axis lie. Schild nach einem der vorhergehenden AnsprĆ¼che, dadurch gekennzeichnet, dass die je vordere der Ɩffnungen (18) je gegenĆ¼ber der zugehƶrigen hinteren Ɩffnung etwas nach unten versetzt ist.Shield according to one of the preceding claims, characterized in that the per each front of the openings (18) is offset slightly downwards relative to the associated rear opening. Schild nach einem der vorhergehenden AnsprĆ¼che, dadurch gekennzeichnedass die Ɩffnungen (18) in einem gleichmƤƟigen Raster angeordnet sind und ihr Rasterabstand das ein- bis zehnfache ihres Durchmessers betrƤgt.Shield according to one of the preceding claims, characterized in that the openings (18) are arranged in a uniform grid and their grid spacing is one to ten times their diameter. Schild nach einem der AnsprĆ¼che 1 bis 9, dadurch gekennzeichnet, dass die Ɩffnungen (18) in jeder Maske (16, 24) insbesondere Ć¼berwiegend voneinander beabstandet sind, und insbesondere wenige Ɩffnungen (18) einander Ć¼berlappen und insbesondere, dass die Ɩffnungen (18) in Symbole bildenden Reihen angeordnet sind.Shield according to one of claims 1 to 9, characterized in that the openings (18) in each mask (16, 24) are in particular predominantly spaced from each other, and in particular a few openings (18) overlap each other and in particular that the openings (18) arranged in symbols forming rows. Schild nach einem der vorhergehenden AnsprĆ¼che, dadurch gekennzeichnet, dass die Scheibe (14) mit einem FĆ¼hrungselement (26) verbunden ist, das Aufnahmen aufweist, in denen LEDs (28) als Lichtquellen gefĆ¼hrt sind.Shield according to one of the preceding claims, characterized in that the disc (14) is connected to a guide element (26) having receptacles in which LEDs (28) are guided as light sources. Schild nach einem der vorhergehenden AnsprĆ¼che, dadurch gekennzeichnet, dass Aufnahmen fĆ¼r LEDs (28) als Lichtquellen im Wesentlichen den gleichen Durchmesser wie die Ɩffnungen (18) aufweisen.Shield according to one of the preceding claims, characterized in that recordings for LEDs (28) as light sources have substantially the same diameter as the openings (18). Schild nach einem der vorhergehenden AnsprĆ¼che, dadurch gekennzeichnet, dass die LEDs (28) in FĆ¼hrungselementen (26) gefĆ¼hrt sind und vor der Maske (16, 24) enden, insbesondere um weniger als 1 mm.Shield according to one of the preceding claims, characterized in that the LEDs (28) are guided in guide elements (26) and terminate in front of the mask (16, 24), in particular by less than 1 mm. Schild nach einem der vorhergehenden AnsprĆ¼che, dadurch gekennzeichnet, dass LEDs (28) in Printplatten gefĆ¼hrt und aufgenommen sind, die die FĆ¼hrung der LEDs in Lichtaustrittsrichtung festlegen und dass die LEDs in vertikaler und horizontaler Richtung in FĆ¼hrungselementen (26) gefĆ¼hrt sind, die, insbesondere formschlĆ¼ssig, an der Scheibe (14) gefĆ¼hrt sind.Shield according to one of the preceding claims, characterized in that LEDs (28) are guided and accommodated in printed circuit boards which define the guidance of the LEDs in the light exit direction and in that the LEDs are guided in vertical and horizontal directions in guide elements (26) which, in particular positively, are guided on the disc (14). Schild nach einem der vorhergehenden AnsprĆ¼che, dadurch gekennzeichnet, dass die LEDs (28) als SMD-Chips ausgebildet sind, die auf einer Printplatte (34) angebracht sind und dass jede SMD hinter einer Ɩffnung (18) und ggf. hinter einer Aufnahme des FĆ¼hrungselements (26) angeordnet ist.Shield according to one of the preceding claims, characterized in that the LEDs (28) are formed as SMD chips, which are mounted on a printed circuit board (34) and that each SMD behind an opening (18) and possibly behind a receptacle of the guide element (26) is arranged.
EP20100157669 2009-04-01 2010-03-25 Sign Active EP2237250B1 (en)

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CN106023616A (en) * 2016-07-26 2016-10-12 马åæ ę° Anti-fog traffic light

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DE29822207U1 (en) * 1998-12-12 1999-03-25 Adolf Nissen Elektrobau GmbH & Co. KG, 25832 Tƶnning Variable message sign
DE10305634A1 (en) 2002-09-11 2004-03-25 Siemens Ag Printer with paper transport roller e.g. for motor vehicles tachographs, includes wedge for sealing in first position paper outlet slot during non-use of printer
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CN105976628A (en) * 2016-07-26 2016-09-28 马åæ ę° Wireless anti-fog traffic light
CN106023616A (en) * 2016-07-26 2016-10-12 马åæ ę° Anti-fog traffic light

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