EP2425418B1 - Enseigne lumineuse pour l'affichage d'une interdiction et/ou d'une indication pour le trafic aérien au sol dans un aéroport - Google Patents

Enseigne lumineuse pour l'affichage d'une interdiction et/ou d'une indication pour le trafic aérien au sol dans un aéroport Download PDF

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Publication number
EP2425418B1
EP2425418B1 EP10719321.1A EP10719321A EP2425418B1 EP 2425418 B1 EP2425418 B1 EP 2425418B1 EP 10719321 A EP10719321 A EP 10719321A EP 2425418 B1 EP2425418 B1 EP 2425418B1
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EP
European Patent Office
Prior art keywords
light
panel
display panel
matrix
sign
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.)
Not-in-force
Application number
EP10719321.1A
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German (de)
English (en)
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EP2425418A1 (fr
Inventor
Martijn Beukema
Pierre TRÉMOUROUX
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ADB bvba
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ADB bvba
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Publication of EP2425418A1 publication Critical patent/EP2425418A1/fr
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Not-in-force 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
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • 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
    • G09F13/0413—Frames or casing structures therefor
    • 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
    • G09F13/0422—Reflectors
    • 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
    • G09F13/0445—Frames
    • 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
    • G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
    • 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
    • G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
    • G09F2013/222—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent with LEDs
    • 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 sign for displaying a command and / or reference for the rolling air traffic at an airport according to the preamble of claim 1.
  • Such luminescent signs are arranged on taxiways and in the apron area at airports and have to comply in terms of their size, their photometric values, their protection and the like international standards, such as in Appendix 14, Volume 1, Chapter 5.4 and Appendix 4 of the ICAO (short for: International Civil Aviation Organization ) is given.
  • ICAO International Civil Aviation Organization
  • mandatory signs are used to identify a site that, if exceeded, requires authorization from the tower.
  • the respective mandatory signs are displayed in white on a red background. Examples include taxiway stop line signs, runway stop signs, Cat I, II and III runway category signs, runway designation signs and "NO ENTRY" signs. All other signs are informational signs.
  • Signposts indicate destination labels with directional arrows, with black information signs on a yellow background. Location signs indicate the taxiway currently in use, with the signs in yellow on black Background are shown. Special signs show the so-called runway markers whose signs are shown in white on a black background.
  • Another disadvantage of fluorescent lamps is their divergent switching times, which increases the time from power up to the full operation of the shield. Full operation is typically only achieved after about a minute of warm-up.
  • Another disadvantage is the high reactive load of the ballast on the primary circuit, which limits the total number of signs in a circuit.
  • a brightness control of the light source is required to fill the important international standards.
  • a dimming of fluorescent lamps is hardly possible, certainly not at low temperatures.
  • Dimming halogen lamps is easily possible, even at low temperatures.
  • For halogen lamps have the disadvantage that at low currents a significant shift of the color locus to yellow is observed, resulting in a deterioration of the color contrast. For example, with mandatory characters representing white characters on a red background, the letters appear yellow while the red turns orange.
  • the number of light-emitting diodes used in the known illuminated sign is defined by the size of the display panel, by the distance between the light-emitting diodes and the display panel and by the radiation pattern of the light-emitting diodes.
  • the number of LEDs used can not be reduced arbitrarily, such as through the use of light emitting diodes with a high light intensity or of light emitting diodes with a better light output.
  • light-emitting diodes are to be regarded as punctiform light sources, objects in the light path between the light source and the display panel produce sharp shadows on the display panel. Such sharp shadows can lead to misinterpretations of the bid or hint displayed on the display panel.
  • Another disadvantage with the use of light emitting diodes for direct lighting arises when these are retrofitted into a light sign, which was originally designed for the use of a fluorescent lamp as a light source.
  • the transmission of the blue portion of the light spectrum emitted by an LED can be visible through a yellow or red display panel.
  • the LED light source through the display panel in a different color, e.g. Violet in the case of a red display panel.
  • the transmission coefficient for the LED spectrum is too small for display panels designed for fluorescent lamps or halogen lamps as the light source.
  • CA 2260583 describes a light-emitting sign for displaying an indication, comprising a frame which supports a transparent front wall and an opaque rear wall, and a light source with light-emitting diodes arranged between the front wall and the rear wall.
  • DE 94 12944 U1 describes a traffic sign, in particular as a destination and location sign or as a mandatory sign on aerodromes serving rolling traffic signs with a housing that is coated inside white matt, the one or double-sided on the side surfaces or a caption disk and equipped with the side surfaces of the inside lighting lamps is.
  • the lamps are connected via a over the entire length of the housing extending arranged and their light heads receiving light carrier tube.
  • the light carrier tube has a light exit slot extending over the entire length and facing the white coated side surface.
  • WO 02/089101 describes a luminous sign comprising light emitting diodes as illumination means, which are arranged within a body.
  • the body includes a light-diffusing inner surface and a light-transmitting screen, which are disposed opposite to each other.
  • the light emitting diodes are arranged such that emitting light is directed substantially to the light scattering inner surface of the body prior to transmission through the light transmitting screen.
  • the invention is based on the object to provide a luminous sign of the type mentioned, which overcomes the mentioned disadvantages while maintaining the advantageous use of light emitting diodes as a light source.
  • the object is achieved by a generic illuminated sign with the features specified in the characterizing part of claim 1.
  • the illuminated sign has a diffusion panel, which is designed for scattering and / or backscattering incident light, wherein the light-emitting diodes is aligned on the diffusion panel, that the display panel is illuminated by stray light of the diffusion panel.
  • An essential feature of the illuminated sign according to the invention thus consists in the indirect backlighting of the display panel by one or more light emitting diodes, which emitted by their orientation light initially falls mainly on the diffusion panel and scattered by this and / or backscattered to illuminate the display panel inside the housing. Due to the spacing between the diffusion and display panel, the latter is illuminated by a significantly larger virtual light source.
  • Indirect lightening reduces or even eliminates sharp shadows cast on the display panel by objects placed in the light path between the diffusion panel and the display panel. Only partial and intrinsic shadows are visible, causing only soft brightness variations on the display panel.
  • existing objects can be left in the housing, which significantly reduces the downtime by retrofitting.
  • the indirect spreading lighting promotes considerably a uniform Color on the display panel. Indirect distribution lighting also achieves a consistent color location over the entire display panel, which prevents irritation in color perception.
  • a particular advantage of indirect lighting is the maintenance of the efficiency of the illuminated sign in the event of failure of individual or even several light-emitting diodes, since the contrast to the background light is smaller than in direct lighting.
  • the diffusion panel are formed as a rear wall and the display panel as a front wall of the housing, wherein the diffusion panel is provided with a scattering layer for the backscattering of incident light.
  • the diffusion panel is here opaque, but inside provided with a litter layer, which scatters incident light back.
  • the application of a diffusive coating on the back wall virtually increases the surface of the LEDs.
  • the backscatter is also essential for the homogeneity of the illumination of the display panel, for soft shadow contours as well as for a consistent color location and a uniform color.
  • the housing has two side walls, a top wall and a bottom wall, which are either also provided with a litter layer or formed inside highly reflective with advantage are. In the latter variant polished metal can be used or a highly reflective coating with low scattering properties. As a result, the brightness is increased, in particular at the edge of the display panel.
  • the diffusion panel of the illuminated sign according to the invention preferably has color pigments whose distribution determines a color location of the display panel.
  • the display panel has a disc and attached thereto a film, which according to the displayed bid and / or Information sign is colored.
  • the disc consists of a 5 mm thick special Plexiglas, such as translucent polycarbonate, while the inside or outside glued foil is a color layer with Lambert radiator properties.
  • the display panel may be given its color design by a layer of paint applied to the pane or by coloring the pane.
  • the at least one light-emitting diode is designed as a high-power light-emitting diode.
  • the high-performance LED is charged with a rated current of at least 100 mA and has a luminous intensity of at least 20 lm.
  • the light output may also increase up to 100 lm / W, which allows the restriction to a smaller number of LEDs in order to achieve the standard brightness levels required.
  • the light-emitting diodes have significantly longer lifetimes of more than 30,000 hours or more than 50,000 hours or even over 100,000 hours.
  • Luminescence diodes are also at low temperatures below 0 ° C, preferably below -40 ° C, functional, by having very short switching times and the light output and the setting of the color place done instantaneously.
  • light-emitting diodes are adjustable in their brightness, without the color location shifts.
  • High-performance light-emitting diodes have a low thermal resistance of, for example, 10 K / W, which makes it very easy to achieve the dissipation of heat, for example by enabling small base-point solutions for the heat sink.
  • Reduced heat sink heatsinks reduce self-shading on the display panel, which improves the light output of the light emitting diodes.
  • the low thermal resistance of the LEDs contributes to the extension of their life, which depends directly on the base temperature and the applied flow stream.
  • conventional light sources such as a fluorescent lamp
  • consumes a bid sign which is operated with high-power LEDs, only 2/3 of the current.
  • the low heat losses heat the illuminated sign only moderately, which not only increases the life of the LEDs, but also the color film on the display panel.
  • ultra-bright light-emitting diodes which emit a light intensity of, for example, 10 Im at a power consumption of 200 mW.
  • Ultrabright light emitting diodes can be arranged close together to achieve comparable brightness characteristics to high performance light emitting diodes.
  • the at least one light-emitting diode is designed to emit white light in the form of a Lambert radiator.
  • White light-emitting diodes now achieve a comparable light output to the fluorescent lamps.
  • the generation of white light is known to be based, for example, on phosphorus-based conversion from blue to white light.
  • White light emitting diodes are commercially available with different lenses or without an external lens. Can be used both inorganic and organic light-emitting diodes, but also so-called potential well-emitting diodes.
  • Particularly suitable for indirect lighting is the lambert radiation characteristic.
  • the at least one light-emitting diode is covered by a transparent protective layer.
  • the protective layer is highly transparent, so that the transmission losses are low. It can for example consist of polycarbonate or PMMA and serves to protect the LEDs from dust and dirt, which could significantly affect the light intensity of the LEDs.
  • the light source in the form of a matrix arranged on light-emitting diodes.
  • the matrix is, for example, a planar arrangement which is aligned parallel to the rear wall or to the display panel.
  • the matrix can be arranged laterally on the side, top or bottom wall or also on a combination thereof.
  • the light-emitting diodes are arranged spaced apart in equidistant units, for example in a row and column pattern.
  • the matrix arrangement favors a highly homogeneous lighting of the display area in order to meet the requirements of international standards. According to the invention, a uniformity factor between adjacent measuring points, which may not exceed 1.5, is changed.
  • the light source can be easily adapted to the type and size of the respective illuminated sign, of which there are over 70 different in the airfield area.
  • the density of the light emitting diode array can be easily changed, in which the distance unit is adjusted.
  • Signs for example, require a lower LED density than mandatory signs.
  • a simple adaptation to future developments in the LED technology in terms of light intensity and luminous efficiency of the LEDs is given.
  • different variants for bidding, information and in particular location signs can be provided, which helps to save electricity costs, because. Signs, for example, require 20% less energy than mandatory signs.
  • At least part of the light-emitting diodes of a luminous shield according to the invention has an optical element for beam shaping.
  • the brightness level of the light source can be improved approximately at the edge of the display panel.
  • the light-emitting diodes of a light shield according to the invention have a higher light intensity at the matrix edge than the light-emitting diodes in the matrix interior.
  • expensive high-performance LEDs can be used at the edge, while in the middle of the matrix cheaper light emitting diodes can be installed. This also allows brightness changes to be reduced by setting adjacent measurement points more uniformly.
  • At least one light-emitting diode in the matrix center has a greater light intensity than the light-emitting diodes on the matrix edge.
  • the texts for the mandatory signs (white letters on a red background) and the signs (yellow letters on a black background) are shown in the center of the display panel, and thus the brightness of the characters can be increased by using higher intensity light emitting diodes in the center of the display Luminous matrix can be increased.
  • the matrix has a plurality of separately replaceable matrix modules with light-emitting diodes.
  • a matrix module of a luminous shield according to the invention has a printed circuit board equipped with the light-emitting diodes, which can be fixed to a holding device in the housing.
  • a simple retrofitting of existing signs is ensured if both conventional light sources and the matrix modules inventive luminous signs can be fixed to the holding device.
  • the transparent protective layer extends over the matrix module to cover all the light-emitting diodes arranged thereon, for example as a cap or cover.
  • this comprises a heat sink, which is thermally conductively connected to the removal of heat with the one or more light-emitting diodes.
  • a heat sink is thermally conductively connected to the removal of heat with the one or more light-emitting diodes.
  • the heat sink is essentially the temperature management, which is essential in particular when using high-power LEDs.
  • the heat sink of a luminous shield according to the invention preferably has a metal core arranged in the printed circuit board.
  • the metal core printed circuit board, or MCPCB Metal Core Printed Circuit Board
  • MCPCB Metal Core Printed Circuit Board
  • the metal core acts as a heat sink and distributor, the narrow version leads to only a slight intrinsic shadow on the display panel when the module is mounted in the light path of the light-emitting diodes.
  • the heat sink of a luminous shield according to the invention has a ribbed metal profile against the printed circuit board.
  • the heat transfer properties are improved when an additional heat sink in the form of a ribbed metal profile is mounted to the metal core of the circuit board. This improves the life of the light-emitting diodes, especially at high currents.
  • light-emitting diodes with a greatly reduced base point can be mounted on thin metal-core printed circuit board strips, which improves the heat distribution. Additional heatsinks can thus be made smaller, which in turn improves the heat distribution.
  • the additional heat sink can be increased in the direction perpendicular to the circuit board without causing photometric losses on the display panel.
  • this comprises a control device for controlling the brightness of the at least one light-emitting diode.
  • this comprises a monitoring device for monitoring the function of the light source.
  • the monitoring device of an illuminated sign according to the invention has at least one photodiode for detecting the light emitted by the at least one light-emitting diode.
  • a photodiode for detecting the light emitted by the at least one light-emitting diode.
  • the monitoring device of an illuminated sign has measuring means for determining the current and / or voltage of the at least one light-emitting diode.
  • An instantaneous LED failure of one or more matrix modules may result in the loss of uniform brightness distribution on the display panel.
  • the electronic monitoring circuit detects such catastrophic failures so that they can be corrected immediately.
  • the housing is divided by at least one partition into at least a first and a second housing part, wherein the first housing part, a first light source and a first display panel and the second housing part have a second light source and a second display panel, and wherein the first and second light sources are separately controllable in such a way that the illuminated sign is designed to alternately display a first or second bid and / or reference by the first or second display panel.
  • Such change signs can be used very advantageously, especially at night.
  • a luminous shield 10 comprises a box-shaped housing 20 having a front, translucent display panel 21, with a rear wall 22 arranged opposite thereto, with two opposite side walls 23, with a removable top wall 24 and with a bottom wall 25 arranged opposite thereto.
  • the housing 20 is made of metal because of its advantageous thermal resistance between a light source arranged in the housing 20 and the outer ambient air.
  • the housing 20 may also be made of organic material, for example of glass fiber reinforced plastic.
  • the display panel 21 comprises a front screen, which is formed for example of 5 mm thick acrylic glass or translucent polycarbonate, and an inside-mounted film, which is designed in accordance with the displayed bid or sign Z color.
  • the color foil can be glued on and has Lambert radiator properties.
  • the light source with a plurality of light emitting diodes 32 is disposed within the housing 20.
  • the housing 20 of the illuminated sign 10 is placed on two support legs 40 with breakaway coupling.
  • the display panel 21 of the light-emitting diodes 32 is not directly, but indirectly, by backscattering their emitted light, illuminated by the diffusion panel 22 formed as a rear wall.
  • the rear wall 22 is provided for this purpose with a litter layer, which scatters incident light back.
  • This diffusive layer is preferably in the form of a polyester powder coating with a silk-matt surface finish, eg with a gloss level of 60%. The degree of gloss influences the tendency of adhesion to be minimized by protection, which is particularly important in the case of the indirect illumination provided according to the invention.
  • the light source preferably has high-power light-emitting diodes which are arranged in the form of a matrix.
  • the matrix comprises a plurality of vertically aligned matrix modules 30 arranged side by side in the housing 20 and each fixed to a holding device 33.
  • the matrix modules 30 can be plugged in and can be exchanged separately.
  • the light-emitting diodes 32 are arranged on a plane in equidistant units, which is aligned in parallel between the display panel 21 and the rear wall 22.
  • the light-emitting diodes 32 are aligned with the rear wall 22 in such a way that light emitted by them is at least partially reflected by the rear wall 22 and illuminates the display panel 21.
  • the display panel 21 is indirectly illuminated by a virtual light source, which is shown on the rear wall 22, and which is significantly larger than the real light source. Due to the indirect backscatter on the rear wall 22, the failure of individual light emitting diodes 32 on the display panel 21 is not or at least less than visible in direct lighting.
  • the inventive indirect backscattering also causes a high consistency of the color locus over the entire display panel 21, which prevents irritation in DesirbwahrEnglishung.
  • the litter layer itself also increases the surface area of the virtual light source projected onto the rear wall 22. Overall, a very high uniformity of the luminance over the entire display panel 21 is achieved according to the invention.
  • FIG. 4 shows the profile 60 of the luminance L of a light-emitting diode 32 as a function of the vertical position y on the display panel 21.
  • the dashed line 61 shows the profile of the luminance L in direct illumination of the display panel 21 through a light emitting diode 32, while the solid line 62 shows the course of indirect illumination.
  • the maxima of both curves coincide at the vertical position of the considered light-emitting diode 32, but are of different heights.
  • both curves 61 and 62 fall to the value of the backlight 63, which consists of housing-internal reflections and scattering.
  • the lower luminance difference between the maximum for indirect illumination 62 and the backlight 63 which is significantly smaller than the brightness contrast between the maximum in direct illumination 61 and the background 63, is exploited.
  • the failure of such a light-emitting diode 32 is therefore essential for indirect illumination less important as with direct lighting.
  • the functionality of the illuminated sign according to the invention and thus the availability of the associated taxiway are thus higher than in the prior art.
  • the modular structure of the matrix-shaped light source offers great advantages.
  • the area density of the light-emitting diodes 32 can be adjusted both by the spacing of the light-emitting diodes 32 on a matrix module 30 and by the distance of the individual matrix modules 30 from one another.
  • This also allows a simple adaptation of the light source to different sizes of illuminated signs according to the invention, of which there are for example over 70 different in the airfield area.
  • the mandatory signs require, for example, a higher luminance than signs.
  • both require highly homogeneous illumination of the display panel 21 to meet the requirements of international airport standards.
  • the uniformity factor between adjacent measuring points must not exceed 1.5.
  • the light-emitting diodes 32 at the edge of the matrix have a greater light intensity than the light-emitting diodes 32 in the matrix center.
  • the luminance at the edge of the display panel 21 can be improved.
  • At least one light-emitting diode 32 in the center of the matrix has a greater light intensity than the light-emitting diodes 32 at the matrix edge.
  • the light-emitting diodes 32 are formed in the illustrated embodiment as high-performance light-emitting diodes. These are energized with a rated current of at least 100 mA and have a light intensity of at least 20 Im. There are also light levels of over 100 lm possible, reducing the number of required LEDs 32 can be reduced for the standard to be fulfilled luminance. In addition to the very high lifetimes, the LEDs 32 are characterized by their puncture even at very low temperatures. They have very short switching times and are instantaneously fully functional in terms of light output and color location. For example, the LED types K2 from Philips Lumileds or type XR-E from CREE are particularly suitable. The low thermal resistance of these light-emitting diodes simplifies the heat dissipation in illuminated signs 10 according to the invention; In addition, it contributes to an extended life of the LEDs 32. The low power consumption of high power LEDs 32 is another advantage.
  • the light-emitting diodes 32 are designed to emit white light in the form of a Lambert radiator. These today have a luminous efficacy comparable to that of a fluorescent lamp.
  • the white light is generated, for example, by phosphor-based conversion of blue light.
  • an outer lens in front of the light emitting diode 32 is dispensed with.
  • the light-emitting diode 32 is covered by a transparent protective layer.
  • a transparent protective layer This consists of a highly transparent material, such as polycarbonate or PMMA, to keep the transmission losses low.
  • the protective layer keeps dust and dirt from the light emitting diodes 32, which could otherwise affect their light intensity.
  • FIG. 2 shows a matrix module 30 of the light source of a luminous sign 10 according to the invention.
  • the module 30 comprises a strip-shaped printed circuit board 31, on which the high-performance light-emitting diodes 32 are arranged at equidistant intervals.
  • the printed circuit board 31 is designed as MCPCB, thus comprising a metal core as a heat sink, which in FIG. 2 is not explicitly shown.
  • the width of the printed circuit board strip 31 is not dimensioned substantially larger than the LED housing itself. In this way, the matrix module 30 inserted into the housing 20 forms only a slight shadow. Due to the low self-shading on the display panel 21, the light output of the light source is improved.
  • the heat transfer properties of the printed circuit board 31 is further improved by an additional, designed as a ribbed metal profile 34 heat sink, which is thermally conductively connected to the circuit board 31.
  • the rib profile extends in a direction perpendicular to the printed circuit board 31 and thus parallel to the main light path between the rear wall 22 and the display panel 21. This configuration of the metal profile 34 also keeps the self-shading of the matrix module 30 low.
  • the high-power light-emitting diodes 32 have a lambert radiation characteristic whose maximum light emission is perpendicular to the printed circuit board 31.
  • the protective layer extends over the matrix module to cover all the light-emitting diodes arranged thereon. This results in a smooth surface over the matrix module, which prevents the accumulation of dust and dirt and allows easy removal of dirt.
  • the protective layer may be provided as a cap or cover for one or more matrix modules.
  • control device by means of which the light source is continuously dimmable.
  • the control device regulates the brightness of the LEDs 32 for example by pulse width modulation of the LED current supply.
  • the color location is not shifted.
  • a monitoring device for monitoring the function of the light source. This comprises on the one hand on the circuit board 31 arranged photodiodes to monitor the light emitted by the LEDs 32 light. If the light intensity of a light-emitting diode 32 decreases over time, a corresponding message is output to a maintenance center. The failure of individual light emitting diodes 32 or a complete matrix module 30 is also reported to the maintenance center in order to restore the normal functioning of a luminous shield 10 according to the invention as soon as possible.
  • the transmission spectrum 50 of a display panel 21 is applied with a red colored foil for a bid sign.
  • the spectrum is normalized to the value 100, which is achieved at 51, namely the wavelength ⁇ of 650 nm red color.
  • the cut-off wavelength 52 which is at a wavelength ⁇ of slightly less than 600 nm, light having lower wavelengths is substantially filtered out, which is equivalent to the effect of a low-pass filter.
  • the transmission spectrum has a transmission peak 53 between 400 nm and 450 nm.
  • the emission spectrum of the light-emitting diodes 32 used in accordance with the invention exhibits a maximum at about 450 nm, which would be visible in the transmission spectrum at least in the case of direct illumination of the display panel 21 due to the transmission peak 53.
  • This problem of direct lighting occurs especially in use from high power LEDs that emit photons from a much smaller area than fluorescent lamps, for example.
  • the blue maximum of high power LEDs on the red display panel is perceived in a different color, such as purple.

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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)
  • Led Device Packages (AREA)

Claims (15)

  1. Panneau lumineux (10) destiné à afficher une instruction et/ou une indication pour le trafic roulant d'aéronefs dans un aéroport, comprenant un boîtier (20) muni d'un panneau d'affichage (21) translucide servant à présenter des signes relatifs à une instruction ou à une indication (Z), un panneau de diffusion (22) et une source de lumière disposée dans le boîtier (20) et entre le panneau d'affichage et le panneau de diffusion, dotée d'une pluralité de diodes électroluminescentes (32) servant à l'éclairage du panneau d'affichage (21),
    caractérisé en ce que le panneau de diffusion est configuré pour la diffusion et/ou la rétrodiffusion de la lumière incidente, les diodes électroluminescentes (32) étant orientées sur le panneau de diffusion (22) de telle sorte que la lumière émise par les diodes électroluminescentes vient principalement frapper le panneau de diffusion (22) et est diffusée et/ou rétrodiffusée par le panneau de diffusion, de sorte que le panneau d'affichage (21) n'est pas éclairé directement mais indirectement par une source de lumière virtuelle représentée sur le panneau de diffusion, laquelle est plus grande que la source de lumière réelle, l'éclairage du panneau d'affichage (21) n'excédant pas un facteur d'uniformité de 1,5 entre des points de mesure voisins.
  2. Panneau lumineux (10) selon la revendication 1, dans lequel le panneau de diffusion (22) est configuré comme une paroi arrière et le panneau d'affichage (21) comme une paroi avant du boîtier (20), et dans lequel le panneau de diffusion (22) est pourvu d'une couche de diffusion destinée à rétrodiffuser la lumière incidente.
  3. Panneau lumineux (10) selon la revendication 1, dans lequel le panneau de diffusion (22) est disposé dans le boîtier (20) entre une paroi avant et une paroi arrière du boîtier (20) et il est de configuration semitranslucide ou translucide, et dans lequel la paroi arrière et la paroi avant sont configurées comme des panneaux d'affichage (21), au moins une diode électroluminescente (32) étant disposée entre la paroi arrière et le panneau de diffusion (22) de telle sorte que la paroi avant est éclairée par de la lumière diffusée qui la traverse.
  4. Panneau lumineux (10) selon l'une des revendications 1 à 3, dans lequel le panneau de diffusion (22) possède des pigments colorés dont la répartition définit une localisation chromatique du panneau d'affichage (21).
  5. Panneau lumineux (10) selon l'une des revendications 1 à 4, dans lequel les diodes électroluminescentes (32) sont conçues comme des diodes électroluminescentes haute puissance.
  6. Panneau lumineux (10) selon l'une des revendications 1 à 5, dans lequel la source de lumière possède des diodes électroluminescentes (32) disposées sous la forme d'une matrice.
  7. Panneau lumineux (10) selon la revendication 6, dans lequel les diodes électroluminescentes (32) sur le bord de la matrice présentent une intensité lumineuse supérieure à celle des diodes électroluminescentes (32) à l'intérieur de la matrice.
  8. Panneau lumineux (10) selon la revendication 6, dans lequel au moins une diode électroluminescente (32) au centre de la matrice présente une intensité lumineuse supérieure à celle des diodes électroluminescentes (32) au bord de la matrice.
  9. Panneau lumineux (10) selon l'une des revendications 6 à 8, dans lequel la matrice possède plusieurs modules matriciels (30) interchangeables séparés munis de diodes électroluminescentes (32).
  10. Panneau lumineux (10) selon la revendication 9, dans lequel un module matriciel possède une couche de protection transparente qui recouvre les diodes électroluminescentes du module matriciel.
  11. Panneau lumineux (10) selon la revendication 9 ou 10, dans lequel un module matriciel (30) possède un circuit imprimé (31) équipé des diodes électroluminescentes (32), lequel peut être fixé à un dispositif de maintien (33) dans le boîtier (20).
  12. Panneau lumineux (10) selon l'une des revendications 1 à 11, comprenant un corps dissipateur de chaleur qui est relié de manière thermoconductrice aux diodes électroluminescentes (32) afin d'évacuer la chaleur.
  13. Panneau lumineux (10) selon l'une des revendications 1 à 12, comprenant un dispositif de contrôle destiné à contrôler le fonctionnement de la source de lumière.
  14. Panneau lumineux (10) selon la revendication 13, dans lequel le dispositif de contrôle possède des moyens de mesure destinés à déterminer le courant et/ou la tension des diodes électroluminescentes (32).
  15. Panneau lumineux (10) selon l'une des revendications 1 à 14, dans lequel le boîtier (20) est divisé par au moins une paroi de séparation en au moins une première et une deuxième partie de boîtier, la première partie de boîtier possédant une première source de lumière et un premier panneau d'affichage et la deuxième partie de boîtier une deuxième source de lumière et un deuxième panneau d'affichage, et les première et deuxième sources de lumière pouvant être commandées séparément de telle sorte que le panneau lumineux (10) soit configuré pour l'affichage alterné d'une première ou d'une seconde instruction et/ou indication par le premier ou le deuxième panneau d'affichage.
EP10719321.1A 2009-04-30 2010-04-30 Enseigne lumineuse pour l'affichage d'une interdiction et/ou d'une indication pour le trafic aérien au sol dans un aéroport Not-in-force EP2425418B1 (fr)

Applications Claiming Priority (2)

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DE102009019288A DE102009019288A1 (de) 2009-04-30 2009-04-30 Leuchtschild zur Anzeige eines Gebots und/oder Hinweises für den rollenden Flugzeugverkehr auf einem Flughafen
PCT/EP2010/055940 WO2010125198A1 (fr) 2009-04-30 2010-04-30 Enseigne lumineuse pour l'affichage d'une interdiction et/ou d'une indication pour le trafic aérien au sol dans un aéroport

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EP2425418A1 EP2425418A1 (fr) 2012-03-07
EP2425418B1 true EP2425418B1 (fr) 2016-07-06

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EP10719321.1A Not-in-force EP2425418B1 (fr) 2009-04-30 2010-04-30 Enseigne lumineuse pour l'affichage d'une interdiction et/ou d'une indication pour le trafic aérien au sol dans un aéroport

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US (1) US8884786B2 (fr)
EP (1) EP2425418B1 (fr)
KR (1) KR20120020142A (fr)
CN (1) CN102483890B (fr)
DE (1) DE102009019288A1 (fr)
RU (1) RU2519504C2 (fr)
WO (1) WO2010125198A1 (fr)
ZA (1) ZA201108089B (fr)

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DE102011000702A1 (de) * 2011-02-14 2012-08-16 Hella Kgaa Hueck & Co. Rollfeldverkehrszeichen
USD751648S1 (en) 2013-08-21 2016-03-15 Cooper Technologies Company Light-emitting diode edge lighted airfield guidance sign
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WO2019046045A1 (fr) * 2017-08-30 2019-03-07 Green Light Innovations Ensemble cadre destiné à être utilisé avec un ou plusieurs dispositifs d'affichage électroniques
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FR3085528B1 (fr) 2018-08-31 2021-11-19 I P Sign Dispositif de controle d'enseignes lumineuses
CN109887403B (zh) * 2019-04-18 2021-07-23 浙江麦知网络科技有限公司 一种飞机入库指示装置
CN115599125B (zh) * 2022-12-14 2023-04-07 电子科技大学 一种基于边缘计算的助航灯光控制策略选择方法
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Publication number Publication date
RU2011148098A (ru) 2013-06-10
KR20120020142A (ko) 2012-03-07
US8884786B2 (en) 2014-11-11
WO2010125198A1 (fr) 2010-11-04
CN102483890B (zh) 2015-07-01
ZA201108089B (en) 2013-04-24
EP2425418A1 (fr) 2012-03-07
DE102009019288A1 (de) 2010-11-11
RU2519504C2 (ru) 2014-06-10
CN102483890A (zh) 2012-05-30
US20120119924A1 (en) 2012-05-17

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