EP2237250A1 - Sign - Google Patents
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- 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
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- 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.)
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- 230000003287 optical effect Effects 0.000 claims description 6
- 238000004026 adhesive bonding Methods 0.000 claims 1
- 230000000717 retained effect Effects 0.000 claims 1
- 239000011888 foil Substances 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000004313 glare Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating 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
- G09F9/33—Indicating 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
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/095—Traffic 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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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
Description
Die Erfindung betrifft ein Schild gemĆ¤Ć dem Oberbegriff von Anspruch 1.The invention relates to a shield according to the preamble of
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 Ćffnungen 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
Diese Lƶsung ist zwar im Grunde fĆ¼r kleinere Schilder gut geeignet. Bei grƶĆeren 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 Ćffnungen, 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 gemĆ¤Ć 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
Diese Aufgabe wird erfindungsgemĆ¤Ć durch Anspruch 1 gelƶst. Vorteilhafte Weiterbildungen ergeben sich aus den UnteransprĆ¼chen.This object is achieved by
ErfindungsgemĆ¤Ć ist es vorgesehen, dass die beiden Masken miteinander Ć¼bereinstimmen und auf den beiden Seiten der Scheibe angebracht sind. Die Ćbereinstimmung 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
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 erfindungsgemƤĆe 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 erfindungsgemƤĆe 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 Ćffnungen der Masken kƶnnen auch minimal grƶĆer sein, wie es auch in der
Insofern ist es gĆ¼nstig, wenn die Ćffnungen beider Masken zueinander formƤquivalent sind. In modifizierter Ausgestaltung ist es vorgesehen, dass die vordere Ćffnung je kleiner als die hintere Ćffnung 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.
ErfindungsgemĆ¤Ć 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 Ćffnungen 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 erfindungsgemƤĆen Schilds;
- Fig. 2
- eine schematische Ansicht einer AusfĆ¼hrungsform eines erfindungsgemƤĆen Schilds;
- Fig. 3
- eine schematische Ansicht des Musters einer Maske fĆ¼r eine weitere AusfĆ¼hrungsform eines erfindungsgemƤĆen Schilds;
- Fig. 4
- ein Schnitt durch eine AusfĆ¼hrungsform eines erfindungsgemƤĆen Schilds; und
- Fig. 5
- eine vergrƶĆerte Ansicht eines Details eines erfindungsgemƤĆen Schilds, unter Darstellung einer LED, eines Teils der Scheibe und der Masken.
- 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.
GemĆ¤Ć der Darstellung in
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
Die in
Hinter jeder der Ćffnungen 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
Wie aus
Die erfindungsgemƤĆe Ausgestaltung der Frontplatte 12 gestattet es auch, randnah zu arbeiten, also die Ćffnungen 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 Ćffnungen 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 grƶĆeren Schildes eingesetzt werden kƶnnen.The inventive design of the
Das erfindungsgemƤĆe 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
Eine weitere Mƶglichkeit der Anordnung von Ćffnungen 18 in der Maske 16 ist aus
In diesem Beispielsfall ist der Abstand zwischen Abstand 22 zwischen einzelnen Ćffnungen 18 deutlich geringer, wobei teilweise auch einige Ćberlappungen der Ćffnungen miteinander realisiert sind, was dazu fĆ¼hrt, dass die zugehƶrigen LEDs aneinander anliegen.In this example, the distance between the
Aus
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
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 Ćffnungen 18 belassen. Derartige Folien sind zweckmƤĆig aufgeklebt und haben bevorzugt den gleichen WƤrmeausdehnungskoeffizient wie die Scheibe14.Instead, however, it is also possible to use films for the
ErfindungsgemĆ¤Ć besonders gĆ¼nstig ist es, wenn unmittelbar anschlieĆend 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
Die FĆ¼hrungsvorrichtung 26 legt die exakte Position von LEDs 28 fest, die je in Ausnehmungen 30 in die FĆ¼hrungsvorrichtung 26 eingesteckt sind.The
Die LEDs 28 sind Ć¼ber AnschlussdrƤhte 32 mit einer Printplatte 34 verbunden. Die AnschlussdrƤhte 32 sind im gewissen MaĆe 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 groĆflƤchige 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
Aus
Es ist ersichtlich, dass bei dieser AusfĆ¼hrungsform die LED das FĆ¼hrungselement 26 nicht Ć¼berragt, sondern im Wesentlichen bĆ¼ndig mit dem FĆ¼hrungselement 26 vorne abschlieĆt. 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
In an sich bekannter Weise dienen die AnschlussdrƤhte 32 gepaart mit der Printplatte 34 zusƤtzlich der WƤrmeabfuhr fĆ¼r den heiĆen LED-Chip.In a manner known per se, the connecting
Claims (15)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200910015877 DE102009015877A1 (en) | 2009-04-01 | 2009-04-01 | sign |
Publications (2)
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EP2237250A1 true EP2237250A1 (en) | 2010-10-06 |
EP2237250B1 EP2237250B1 (en) | 2014-09-24 |
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EP20100157669 Active EP2237250B1 (en) | 2009-04-01 | 2010-03-25 | Sign |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102022116234A1 (en) | 2022-06-29 | 2024-01-04 | Pfanner Schutzbekleidung Gmbh | Flat display device |
Citations (6)
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US3768188A (en) * | 1972-02-15 | 1973-10-30 | Daktronics | Readout |
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 |
DE10305631A1 (en) | 2003-02-11 | 2004-08-19 | Bremicker Verkehrstechnik Gmbh & Co. Kg | Display arrangement for traffic lights, has a perforated mask arranged next to light sources to support the light sources |
DE10306631A1 (en) | 2003-02-14 | 2004-09-09 | Institut fĆ¼r Polymerforschung Dresden eV | Process for the production of activated polyolefin surfaces and / or interfaces and molded parts with activated polyolefin surfaces and / or interfaces |
DE102005002535B3 (en) * | 2005-01-14 | 2006-03-23 | Siemens Ag | Traffic sign for guidance of road vehicles has array of LED's giving variable display, each with scattering lens behind opaque screen with transparent windows |
-
2009
- 2009-04-01 DE DE200910015877 patent/DE102009015877A1/en not_active Withdrawn
-
2010
- 2010-03-25 EP EP20100157669 patent/EP2237250B1/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3768188A (en) * | 1972-02-15 | 1973-10-30 | Daktronics | Readout |
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 |
DE10305631A1 (en) | 2003-02-11 | 2004-08-19 | Bremicker Verkehrstechnik Gmbh & Co. Kg | Display arrangement for traffic lights, has a perforated mask arranged next to light sources to support the light sources |
DE10306631A1 (en) | 2003-02-14 | 2004-09-09 | Institut fĆ¼r Polymerforschung Dresden eV | Process for the production of activated polyolefin surfaces and / or interfaces and molded parts with activated polyolefin surfaces and / or interfaces |
DE102005002535B3 (en) * | 2005-01-14 | 2006-03-23 | Siemens Ag | Traffic sign for guidance of road vehicles has array of LED's giving variable display, each with scattering lens behind opaque screen with transparent windows |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Also Published As
Publication number | Publication date |
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DE102009015877A1 (en) | 2010-10-07 |
EP2237250B1 (en) | 2014-09-24 |
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