EP1031125B1 - Afficheur d'informations - Google Patents

Afficheur d'informations Download PDF

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Publication number
EP1031125B1
EP1031125B1 EP98963359A EP98963359A EP1031125B1 EP 1031125 B1 EP1031125 B1 EP 1031125B1 EP 98963359 A EP98963359 A EP 98963359A EP 98963359 A EP98963359 A EP 98963359A EP 1031125 B1 EP1031125 B1 EP 1031125B1
Authority
EP
European Patent Office
Prior art keywords
light
light source
information display
display
display surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98963359A
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German (de)
English (en)
Other versions
EP1031125A1 (fr
Inventor
Fariborz Khavand
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.)
Infosystems Visuelle und Akustische Systeme fur Die Verkehrstechnik GmbH
InfoSystems GmbH
Original Assignee
Infosystems Visuelle und Akustische Systeme fur Die Verkehrstechnik GmbH
InfoSystems GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Infosystems Visuelle und Akustische Systeme fur Die Verkehrstechnik GmbH, InfoSystems GmbH filed Critical Infosystems Visuelle und Akustische Systeme fur Die Verkehrstechnik GmbH
Priority to DE29824715U priority Critical patent/DE29824715U1/de
Publication of EP1031125A1 publication Critical patent/EP1031125A1/fr
Application granted granted Critical
Publication of EP1031125B1 publication Critical patent/EP1031125B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • 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
    • 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

Definitions

  • the invention relates to an information display according to the Preamble of claim 1.
  • ballasts of the fluorescent lamps send out electromagnetic signals, for example can interfere with the control of the display device.
  • This Interference must be in the known devices relatively complex measures, for example corresponding Shields or the like.
  • the invention is therefore based on the object of an information display of the type mentioned at the beginning to provide the disadvantages mentioned or not to a lesser extent Has dimensions.
  • an easy to manufacture as space-saving and flexible as possible Illumination device can be specified.
  • the task is based on an information display according to the preamble of claim 1, by the in the characterizing Part of claim 1 specified features solved.
  • the invention includes the technical teaching that one a particularly space-saving, inexpensive and flexible Generic device to be used for illumination the ad interface of an information ad, if the light source is formed by a number of light emitting diodes is.
  • LEDs Through the use of LEDs, a Numerous advantages over the known devices achieved. This is how the LEDs are characterized a much smaller space requirement than the known Fluorescent lamps as light sources. Farther the LEDs can be operated directly on DC voltage are and therefore do not require any complex Ballasts. On the one hand, this reduces the Expenditure for the switching electronics of the device itself, on the other hand, they are also used in conjunction with for example electromagnetically operated display devices no further complex shielding measures or the like for the control devices of the display device required.
  • Another advantage is the almost arbitrary length and the flexibility that can be achieved when using the inventive Light source from light emitting diodes.
  • the light source can be done simply by choosing the appropriate number and the distance between the individual according to the invention in at least one essentially parallel to the longitudinal edge Row arranged LEDs to practically any Dimensions of the display device can be adjusted.
  • the LEDs are characterized by their vastness lower energy requirements and their long lifespan, so that one is not only in the acquisition, but also in the Operation results in particularly economical information display.
  • the light guide device can by appropriate Prisms or lenses or reflectors or constructed from them Light guide systems are formed, which are the light of the light source accordingly in a known manner on the ad interface to distribute.
  • the light guide device is preferably particularly simple to be produced in the manner of a concave reflector trained, the at least one before, d. H. observer side level of the ad interface, the Light source facing and essentially parallel to this has a running reflection surface.
  • This reflection surface is made up of a number of reflective surfaces formed, each of the light striking them Reflect light source on the display surface. there at least one reflection surface is provided, the light the light source to the furthest perpendicular to the long edge remote area of the ad surface to be illuminated reflected.
  • the reflective surface that the light on the farthest remote area of the ad surface to be illuminated reflected is a complete in a simple manner Illumination of the area of the display surface to be illuminated ensured.
  • the one to be illuminated Range can be the entire ad interface, if, for example, just along a light source a longitudinal edge of the display device is provided is. However, is on two opposite Long edges of the display device each have a light source provided with appropriate light guide, so extends the one to be illuminated by the respective light source It makes sense only to the middle of the Ad surface between the two longitudinal edges on which the light sources are arranged.
  • the corresponding reflective surface must then only be designed so that they then light the light source to the maximum Center line reflected.
  • the reflection surfaces are designed such that the decrease in light intensity with the beam path between Light source and display surface is compensated.
  • This compensation for the decrease in light intensity with the Distance from the light source can be known in many ways Be realized wisely.
  • the reflector can for example be trained that the light between the light source and Ad interface regardless of the distance between the point of impact of the light on the display surface and the light source always travels approximately the same beam path. This can be done by placing the light on closer Areas of the ad surface that are near the light source strikes, for example over several and / or over reflection surfaces directed away from the light source and thus runs through approximately the same beam path as Light that shines on areas further away from the light source the ad interface, for example only via a reflection surface close to the light source is directed.
  • the area of the reflecting surfaces is proportional to Square of the mean beam path between the light source and the respective area of the ad interface which the light from the light source is reflected.
  • the inventive design of the reflective surfaces this decrease in intensity becomes easier Compensated for by the increasing beam path increasing surface area of the corresponding reflection surfaces a correspondingly larger proportion of the light the light source is reflected in areas to which the light has to travel a longer distance.
  • the light rays from the light source are included also hit several reflection surfaces and from these can be reflected.
  • Information display is the reflection surface designed in such a way that for uniform illumination the ad surface the more light on an area the flatter the Angle of incidence of the coming from the reflection surface Light on the respective area of the ad surface is. This makes compensation easy the influence of the angle of incidence of the light on the reflection of light through the display surface towards of the viewer, which is that all the more less light from the ad interface towards one usually some distance from the ad interface viewer is reflected, the flatter the light hits the ad surface.
  • the reflection surface of essentially flat reflection surfaces running parallel to the longitudinal edge educated can be special easy to manufacture and correspondingly easy align with the conditions of the ad interface.
  • the light guide preferably comprises for steering that is not emitted in the direction of the reflection surface
  • Light of the light source on the reflection surface an essentially U-shaped surrounding the light source, collector reflector open towards the reflection surface, so that if possible the whole of the light source emitted amount of light reaches the display surface and thus the necessary for the illumination Number of LEDs reduced.
  • a particularly space-saving version of the invention Information display is available with other variants, where the light source is essentially behind the plane the ad interface.
  • the Device together with the display device vertically to the ad interface relatively small dimensions, since only the reflective surface and the ones supporting it Components of the information display on the side in front of the display interface are arranged.
  • Information displays that are beneficial, such as this for destination displays of buses or rail vehicles the case is arranged behind a glass pane or the like are. The smaller the distance between the ad surface and the glass pane is the less design the disturbing reflections are sufficient Extraneous light, for example strong sunlight, and switched off light source.
  • the light-emitting diodes as light-emitting diodes with directed radiation in an angular range of essentially at most 15 ° are formed.
  • the light source comprises for this purpose at least two essentially parallel to each other Rows of light emitting diodes. The radiation directions of the light emitting diodes run parallel within the respective row to each other.
  • the areas of the reflection surface, on which the light of the rows strikes different are aligned so that they light up the they directed rows of LEDs in different Directions and thus to different areas of the ad interface reflect. Additionally or alternatively can also determine the respective radiation directions of the rows of LEDs run inclined to each other.
  • the uniform illumination of the advertising surface especially just be set.
  • the transparent windscreen of the display device even the reflector, in which part of the light from the LED thrown from the inside onto the display surface becomes.
  • the display area is parallel arranged to the windscreen, while at single-line Arrangement itself with increasing distance from the LEDs approach the windscreen at an angle of 5 to 15 °.
  • the ad interface is at least partially visible Spectral region formed material showing luminescence and the light emitting diodes emit light that has a wavelength range which, when the light strikes the reflective surfaces causes luminescence. hereby the display is easy to read increased even further.
  • the material of the reflective surfaces preferably shows fluorescence or phosphorescence.
  • the LEDs send to easily increase the readability of the display colored light in a wavelength range with a high degree of brightness sensitivity of an observer.
  • control device for controlling the Luminosity of the light source depending on the incidence of extraneous light provided on the ad interface, thereby always in a simple way for easy readability of the ad surface sufficient illumination required the ad interface is secured.
  • the control device preferably comprises a photosensor to capture the incidence of extraneous light on the advertising interface , one connected to the output of the photosensor Processing device and at least one of the light emitting diodes upstream constant current regulator for regulating the LED current, whose control input with the output is connected to the processing device.
  • the constant current regulator leads controlled by the processing device the strength of the LED current and regulates so the brightness with little circuit complexity the light source and thus the additional one as required Illumination of the advertising interface.
  • the information display is the display device as Dot matrix display device with on a common Printed circuit board arranged dot matrix elements and the light emitting diodes are on the side of the dot matrix elements arranged on the circuit board so that there is a particularly quick and easy to manufacture closed Unit results. It is also preferred that Photosensor arranged on the circuit board.
  • (N) light-emitting diodes are connected in series with an upstream constant current regulator, wherein the sum of the voltages of the (N) light-emitting diodes occurring at the set current essentially corresponds to the minimum voltage of the power supply device of the device.
  • At least two on opposite longitudinal sides the light source arranged with associated Light guiding devices are provided so that the respective Light source only half of those to be illuminated Has to illuminate the ad interface. This reduces on the one hand, the number of required per light source LEDs, on the other hand reduce the dimensions the respective light guide with the resulting resulting advantages mentioned above. This effect intensifies still if, as in other preferred versions the case on all long sides of the display device arranged light sources with associated light guide devices are provided.
  • Figure 1 shows an embodiment of the information display according to the invention with a display device 1, which as Dot matrix display device is executed, and one Device 2 for illuminating the display surface 3 of the Display device 1.
  • the device 2 comprises four each side along one of the four longitudinal edges 1.1 to 1.4 of the display device 1 in a housing 2.1 extending light sources 4.1 to 4.4 and each of these adjacent and parallel to these in the housing 2.1 Light guide devices 5.1 to 5.4, which the of the respective light source 4.1 to 4.4 emitted light direct the display interface 3.
  • the light sources 4.1 to 4.4 each consist of a parallel to the respective Longitudinal edge 1.1 to 1.4 arranged row of light emitting diodes 6th
  • the light sources 4.1 and 4.3 light up via the associated ones Light guide devices 5.1 and 5.3 each of them adjacent half of the ad surface 3 to the horizontal Center line 1.5 off during this illumination superimposes the light sources 4.2 and 4.4 over the associated ones Light guide devices 5.2 and 5.4 each give them adjacent half of the ad surface 3 to the vertical Irradiate center line 1.6 so that a complete Illumination of the display surface 3 is achieved.
  • a photosensor 8 is arranged, which Incident light captured on the display surface 3.
  • the Photosensor 8 is part of a control device which the luminosity of the light sources 4.1 to 4.4 depending on from the incidence of extraneous light on the display surface 3 regulates.
  • Figure 2 shows a partial section through the design Figure 1 to the horizontal center line 1.5 of the information display.
  • the light emitting diodes forming the light source 4.1 6 are to the side of the display device 1
  • Dot matrix elements 3.1 on a common circuit board 9 arranged over a back plate 2.2 in the housing 2.1 is fixed.
  • the circuit board carries everything electrical connection lines to the dot matrix elements 3.1 or the light emitting diodes 6. To be as low as possible Dimensions perpendicular to the plane of the display surface 3 too achieve the LEDs behind, d. H. on the a viewer of the display facing away from the level the display surface 3 arranged.
  • the light guide device 5.1 arranged in the housing 2.1 is, as can be seen in Figure 2, in the manner of a concave Reflector formed, where one before, d. H. observer side the level of the display surface 3 arranged Has reflection surface 10 that the light source 4.1 is facing and the light of the Light source 4.1 reflected on the display surface 3.
  • the reflection surface 10 runs parallel to Light source 4.1 and thus also parallel to the longitudinal edge 1.1 the display device 1.
  • the reflection surface 10 consists of parallel to Longitudinal edge 1.1 flat reflection surfaces 11.1, 11.2 and 11.3 together, the different tendency to Have level of the ad surface 3.
  • the reflective surface 11.1 runs so steeply to the level of the advertising interface 3 inclined that, as through the beam path 12.1 is indicated that from the direction of the light source 4.1 light striking them on the perpendicular to the longitudinal edge 1.1 to be illuminated most distant from the light source 4.1 Area of the display surface 3 reflected that ends at the horizontal center line 1.5.
  • the other reflection surfaces 11.2 and 11.3 are flatter to the level of the ad surface 3 and reflect how is indicated by the beam paths 12.2 and 12.3, that light striking it from the direction of the light source 4.1 to areas of the display surface closer to the light source 4.1 3, creating a full illumination the ad surface 3 is achieved.
  • the area of the reflection surfaces is proportional to the square of the average beam path of light between the light source 4.1 and the respective area of the Display surface 3 on which the respective reflection surface reflects the light coming from the direction of the light source 4.1, so that the influence of the decrease in intensity of light with increasing beam path between light source 4.1 and display surface 3 is compensated.
  • the light guide 5.1 comprises another Reflecting surface 11.4, which is from the direction of the light source 4.1 light striking them on the reflection surface 11.3 reflects from where, as the beam path 12.4 indicates, on the farthest from the light source 4.1 Area of the display surface to be illuminated 3 is reflected.
  • the amount of light reaching the area becomes the influence of the very flat angle of incidence of the reflection surface 11.1 compensated light reflected in this area. hereby results for a viewer via the ad interface 3 uniform brightness impression.
  • the whole of the light source 4.1 To project light onto the display surface 3 comprises the light guide device 5.1 continues to be a collective reflector 13, which is the light source formed by light-emitting diodes 6 4.1 U-shaped surrounds.
  • the collecting reflector 13 runs here also parallel to the longitudinal edge 1.1 of the display device 1 and is open to the reflection surface 10. It is shaped in such a way that it strikes it Directs light onto the reflective surface 10 from which it is gets to the ad surface 3.
  • the light guide 5.1 is as a one-piece component executed in the area of the collector reflector 13 on the circuit board side has a foot 13.1 with a mounting opening 13.2 is provided. This assembly opening 13.2 for exact alignment of the light guide 5.1 Light source 4.1 over the mounting base 6.1 of the light source 4.1 managed. Then the light guide 5.1 for final fixation by suitable means with the Printed circuit board 9 and / or the housing 2.1.
  • the photosensor 8 also firmly mounted on the printed circuit board 9, which of course, all connecting lines too this carries.
  • the photosensor 8 extends on the observer side the circuit board through a recess 7 in the housing 2.1 and has one outside of the light by Light source 4.1 illuminated room arranged detection surface 8.1 for incidence of light, so that it is from the light source 4.1 reaching the display surface 3 Light is not captured, but only the extraneous light that shines on it or in the vicinity of the display surface 3. This makes it particularly easy to regulate the brightness the light source 4.1 possible.
  • the rotary plate forming the display surface 3 of the Dot matrix elements 3.1 have on their colored side - the other side is the usual one for such advertisements Blackened way - a color coating that matches the hue corresponds to the light emitted by the light emitting diodes 6.
  • This colored light is in a wavelength range with a high degree of sensitivity to light of an observer. Such light is perceived as particularly bright Daytime viewing in a wavelength range between 500 and 650 nm, this range at night (about 50 nm) is shifted towards somewhat lower wavelengths. It it is understood that by complete or in sections Change in the wavelength of the light emitted by the LEDs Light shown on the display surface Information for a viewer is particularly plastic and can be designed to be easy to read. Here are particular Yellows are special because of their longer-wave proportion of light suitable, the atmosphere under invisible conditions (Fog, haze, etc.).
  • Figure 3 shows a further embodiment of the invention, which in their structure essentially the embodiment of Figure 1 and 2 is similar, so that only the differences are dealt with here shall be.
  • the light source 4.1 ' comprises three for this variant Longitudinal edge 1.1 'of the display device 1' parallel rows 14.1, 14.2 and 14.3 of light emitting diodes 6 '.
  • the LEDs 6 'of rows 14.1, 14.2 and 14.3 are concerned LEDs with directional radiation in an angular range of about 10 °, d. H. they send a cone of light with them half an opening angle of 5 ° around their respective radiation direction 15.1, 15.2 or 15.3.
  • the light emitting diodes 6 ' are corresponding at their end on the observer side bevelled mounting base 16.1, 16.2 and 16.3 see above aligned that the radiation directions of the LEDs 6 'in parallel within the rows 14.1, 14.2 and 14.3 run to each other, while radiation directions 15.1, 15.2 and 15.3 are arranged inclined to each other.
  • the radiation directions 15.1, 15.2 and 15.3 are each on one of the flat reflection surfaces fixed in the housing 2.1 ' 11.1 ', 11.2' or 11.3 'directed, the reflection surface 10 'of the light guide 5.1' form.
  • the reflection surfaces 11.1 ', 11.2' and 11.3 ' are included via swivel joints that can be locked in any swivel positions 17 connected to the housing 2.1 '.
  • the swivel axes the swivel joints 17 run parallel to the longitudinal edge 1.1 'of the display device 1'.
  • lockable swivel joints 17 is a simple, possibly also subsequent adjustment of the illumination the display surface 3 'by a corresponding Alignment of the angle of inclination of the reflection surfaces 11.1 ', 11.2' or 11.3 'to the level of the display surface 3' possible to the given requirements.
  • the arrangement of the reflection surfaces 11.1 ', 11.2' and 11.3 ' and their inclination to the level of the display surface 3 ' is in shown embodiment selected so that the mean beam paths of the individual rows 14.1, 14.2 and 14.3 emitted light between the respective LEDs 6 'and the display surface 3' only slightly differ.
  • These differences in the middle Beam paths and the resulting differences in intensity of the different areas of the ad interface 3 'of incident light are in this Execution compensated in that the impact angle of the Light through the arrangement and alignment of the reflective surfaces 11.1 ', 11.2' or 11.3 'is correspondingly flatter, the shorter the mean beam path.
  • the rotary plate forming the display surface 3 ' Point matrix elements 3.1 bear on their information-bearing, colored reflective side - the other side is blacked out in the usual way with such advertisements - one Coating made of a phosphorescent material. Furthermore, the light emitting diodes 6 'emit light, the one Has wavelength range, when the light hits of the light emitting diodes 6 'to those with the phosphorescent Coated side of the rotary plate the phosphorescence of the coating material. This will on the one hand the readability of the display when the display is switched on Illumination increased, on the other hand this is due to the phosphorescence the coating even if the lighting fails guaranteed for a certain period of time.
  • FIG. 4 shows a block diagram of a preferred embodiment the device for illuminating the display surface according to the present invention.
  • the device for illuminating the display surface according to the present invention.
  • the invention are (N) light emitting diodes 6 "of a light source 4.1 "with an upstream constant current regulator 18 connected in series.
  • Several such rows are in parallel with a power supply device 19 and a constant voltage regulator 20 connected in series connected.
  • the sum of the by constant current regulator 18 current setting voltages of the (N) LEDs 6 “corresponds to the minimum voltage of the Power supply device 19.
  • the constant voltage regulator 20 always ensures constant tension. This Voltage is also at the minimum voltage of the power supply device 19, so that when the Minimum voltage of the power supply device 19 a reliable Operation of the device is ensured.
  • the device further comprises a control device 21 with a photosensor 8 for detecting the incidence of extraneous light on the ad interface and a processing facility 22, whose input 22.1 with the output 8.2 of the photosensor 8 is connected.
  • Control inputs 18.1 of the respective Constant current regulators 18 are used to regulate the LED current with the output 22.2 of the processing device connected is.
  • the processing device 22 processes the corresponding to the incidence of light on the detection surface of the photo sensor 8 applied to its output 8.2 Input signals by storing them with Compares reference values. Depending on the range of reference values the output signal of the photosensor 8 falls, is at the output 22.2 of the processing device 22 and the constant current controller at the control inputs 18.1 18 a corresponding control signal.
  • the constant current regulator 18 carry the current in according to the respective row of light-emitting diodes, whereby one each more or less strong according to the set current Light emission from the LEDs 6 "results.
  • the circuit board 9 ' with increasing distance from the LEDs 6 of the front window 23 approximated - stands at an angle of approx. 5 to 15 ° to. In this way, the proportion of light rays which reach the front surface of the display elements 1 directly - And thus the lighting intensity of the display elements elevated.
  • the arrangement of the light-emitting diodes is preferred here limited to one line.

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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)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
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Claims (21)

  1. Dispositif d'affichage d'informations comprenant un dispositif d'affichage passif (1, 1'), notamment un dispositif d'affichage à matrice de points, et un dispositif pour éclairer la surface d'affichage (3, 3') du dispositif d'affichage (1, 1'), et qui comprend une source de lumière (4.1, 4.1', 4.2, 4.3, 4.4) qui s'étend latéralement le long d'un bord longitudinal (1.1, 1.1', 1.2, 1.3, 1.4) du dispositif d'affichage (1, 1') et un dispositif formant guide de lumière (5.1, 5.1', 5.2, 5.3, 5.4), qui jouxte la source de lumière (4.1, 4.1', 4.2, 4.3, 4.4) est sensiblement parallèle à cette source de lumière et ne chevauche pas, au moins selon une vue en plan, la surface d'affichage (3, 3') et sert à dévier au moins une partie de la lumière émise par la source de lumière (4.1, 4.1', 4.2, 4.3, 4.4), en direction de la surface d'affichage (3, 3') du dispositif d'affichage (1,1'),
    caractérisé en ce que la source de lumière (4.1, 4.1', 4.2, 4.3, 4.4) est formée par un nombre de diodes à luminescence (6, 6', 6"), qui sont disposées suivant au moins une rangée (14.1, 14.2, 14.3) qui s'étend essentiellement parallèlement au bord longitudinal (1.1, 1.1'), 1.2, 1.3, 1.4) et le dispositif formant guide de lumière (5.1, 5.1', 5.2, 5.3, 5.4) est agencé de telle sorte que la surface d'affichage (3, 3') du dispositif d'affichage (1, 1') est éclairé d'une manière sensiblement uniforme.
  2. Dispositif d'affichage d'informations selon la revendication 1, caractérisé en ce que le dispositif formant guide de lumière (5.1, 5.1') est agencé à la manière d'un réflecteur concave ou plan, qui comporte au moins une surface réfléchissante (10, 10'), qui est disposée devant, c'est-à-dire sur le côté observateur, du plan de la surface d'affichage (3, 3'), est tournée vers la source de lumière (4.1, 4.1'), est sensiblement parallèle à cette source de lumière, est constituée par au moins une surface réfléchissante (11.1, 11.2, 11.3, 11.1', 11.2', 11.3') et réfléchit la lumière, qui l'atteint, de la source de lumière (4.1, 4.1') sur la surface d'affichage (3, 3'), et
    dans lequel il est prévu au moins une surface réfléchissante (11.1, 11.1'), qui réfléchit la lumière de la source de lumière (4.1, 4.1') sur la partie devant être éclairée, qui est la plus éloignée perpendiculairement au bord longitudinal (1.1, 1.1') de la surface d'affichage (3, 3'),
    dans lequel la surface réfléchissante (10, 10') est agencée de telle sorte que la réduction de l'intensité de la lumière est sensiblement compensée par le trajet du faisceau entre la source de lumière (4.1, 4.1') et la surface d'affichage (3, 3').
  3. Dispositif d'affichage d'informations selon la revendication 2, caractérisé en ce que l'aire des surfaces réfléchissantes (11.1, 11.2, 11.3, 11.1', 11.2', 11.3') est proportionnelle au carré du trajet moyen du rayonnement entre la source de lumière (4.1, 4.1') et la zone respective de la surface d'affichage (3, 3') sur laquelle la surface réfléchissante respective (11.1, 11.2, 11.3, 11.1', 11.2', 11.3') réfléchit la lumière qui arrive de la direction de la source de lumière (4.1, 4.1') et rencontre cette surface, ou
    que les surfaces réfléchissantes (11.1, 11.2, 11.3, 11.1', 11.2', 11.3') sont disposées et orientées de telle sorte que les trajets moyens respectifs du rayonnement entre la source de lumière (4.1, 4.1') et la zone respective de la surface d'affichage (3, 3') sur laquelle la surface réfléchissante respective (11.1, 11.2, 11.3, 11.1', 11.2', 11.3') réfléchit la lumière qui arrive dans la direction provenant de la source de lumière (4.1, 4.1') et qui rencontre cette surface, possèdent sensiblement la même longueur.
  4. Dispositif d'affichage d'informations selon la revendication 2 ou 3, caractérisé en ce que la surface réfléchissante (10, 10') est conformée de telle sorte que pour l'éclairement uniforme de la surface d'affichage (3, 3'), une quantité d'autant plus importante de lumière est réfléchie sur une partie de la surface d'affichage (3, 3') que l'angle d'incidence de la lumière arrivant de la surface réfléchissante (10, 10') et rencontrant la partie respective de la surface d'affichage (3, 3') est faible.
  5. Dispositif d'affichage d'informations selon l'une des revendications précédentes, caractérisé en ce que la surface réfléchissante (10, 10') est formée par des surfaces réfléchissantes (11.1, 11.2, 11.3, 11.1', 11.2', 11.3') qui sont sensiblement planes et s'étendent parallèlement au bord longitudinal (1.1, 1.1').
  6. Dispositif d'affichage d'informations selon l'une des revendications précédentes, caractérisé en ce que le dispositif formant guide de lumière (5.1) servant à dévier la lumière de la source de lumière (4.1), qui n'est pas émise en direction de la surface réfléchissante (10), en direction de la surface réfléchissante (10), comprend un réflecteur de collecte (13) qui entoure la source de lumière (4.1), est agencé essentiellement en forme de U et est ouvert en direction de la surface réfléchissante (10).
  7. Dispositif d'affichage d'informations selon l'une des revendications précédentes, caractérisé en ce que la plaque avant (23) du dispositif d'affichage forme simultanément le réflecteur.
  8. Dispositif d'affichage d'informations selon l'une des revendications précédentes, caractérisé en ce que la source de lumière (4.1, 4.1') est disposée essentiellement en arrière du plan de la surface d'affichage (3, 3').
  9. Dispositif d'affichage d'informations selon l'une des revendications précédentes, caractérisé en ce que les diodes à luminescence (6') sont agencées sous la forme de diodes à luminescence ayant une émission dirigée dans une plage angulaire égale pour l'essentiel tout au plus à 15°.
  10. Dispositif d'affichage d'informations selon la revendication 9, caractérisé en ce que la source de lumière (4.1') comporte au moins deux rangées (14.1, 14.2, 14.3) essentiellement parallèles entre elles, de diodes à luminescence (6'), les directions d'émission (15.1, 15.2, 15.3) des diodes à luminescence (6'), et dans lequel les directions d'émission s'étendent parallèlement entre elles à l'intérieur de chaque rangée (14.1, 14.2, 14.3), et pour l'éclairement ciblée de la surface d'affichage (3'), les parties de la surface réfléchissante (10'), que rencontre respectivement la lumière des rangées (14.1, 14.2, 14.3), sont orientées différemment et/ou les dispositifs respectifs d'émission (15.1, 15.2, 15.3) des rangées (14.1, 14.2, 14.3) sont inclinées.
  11. Dispositif d'affichage d'informations selon l'une des revendications précédentes, caractérisé en ce que les surfaces réfléchissantes de la surface d'affichage (3, 3') sont formées au moins en partie par un matériau présentant une luminescence dans la plage spectrale visible, et que les diodes à luminescence (6') émettent une lumière qui possède une gamme de longueurs d'onde, qui produit une luminescence lors de l'impact de la lumière sur les surfaces réfléchissantes.
  12. Dispositif d'affichage d'informations selon la revendication 11, caractérisé en ce que le matériau des surfaces réfléchissantes produit une fluorescence et/ou une phosphorescence.
  13. Dispositif d'affichage d'informations selon l'une des revendications précédentes, caractérisé en ce que les diodes à luminescence (6) émettent une lumière colorée dans une gamme de longueurs d'onde pour une sensiblement élevée de l'oeil humain et/ou pour une grande capacité de pénétration de l'atmosphère.
  14. Dispositif d'affichage d'informations selon l'une des revendications précédentes, caractérisé en ce qu'il est prévu un dispositif de régulation (21) pour régler l'intensité lumineuse de la source de lumière (4.1) en fonction de l'incidence d'une lumière étrangère sur la surface d'affichage (3).
  15. Dispositif d'affichage d'informations selon la revendication 4, caractérisé en ce que le dispositif de régulation (21) comprend un photodétecteur (8) servant à détecter l'incidence d'une lumière étrangère sur la surface d'affichage (3), un dispositif de traitement (22) relié à la sortie (8.2) du photodétecteur (8), et au moins un régulateur de courant constant (18), qui est branché en amont d'au moins l'une des diodes à luminescence (6") et sert à régler le courant de la diode à luminescence et dont l'entrée de commande (18.1) est reliée à la sortie (22.2) du dispositif de traitement (22), le régulateur de courant constant (18) réalisant l'asservissement de l'intensité du courant de la diode à luminescence, d'une manière commandée par le dispositif de traitement (22).
  16. Dispositif d'affichage d'informations selon la revendication 15, caractérisé en ce que le photodétecteur (8) comporte au moins une surface de détection (8.1) qui s'étend parallèlement à la surface d'affichage (3), pour une incidence de la lumière, cette surface de détection étant disposée à l'extérieur de l'espace éclairé par la lumière de la source de lumière (4.1, 4.1").
  17. Dispositif d'affichage d'informations selon l'une des revendications précédentes, caractérisé en ce que le dispositif d'affichage (1, 1') est agencé sous la forme d'un dispositif d'affichage à matrice de points comportant des éléments de matrice de points (3.1, 3.1') disposés sur une plaquette à circuits imprimés commune (9, 9'), et les diodes à luminescence (6, 6') sont disposées latéralement par rapport aux éléments de la matrice de points, sur la plaquette à circuits imprimés (9, 9').
  18. Dispositif d'affichage d'informations selon la revendication 17, caractérisé en ce que le photodétecteur (8) est disposé sur la plaquette à circuits imprimés (9).
  19. Dispositif d'affichage d'informations selon l'une des revendications précédentes, caractérisé en ce que respectivement (N) diodes à luminescence (6") sont branchées en série avec un régulateur de courant constant (18) branché en amont, la somme des tensions, qui s'établissent pour le courant réglé, des N diodes à luminescence (6") correspondant essentiellement à la tension minimale du dispositif d'alimentation en courant (19) du dispositif.
  20. Dispositif d'affichage d'informations selon l'une des revendications précédentes, caractérisé en ce qu'au moins deux sources de lumière (4.1, 4.2, 4.3, 4.4), disposées sur des côtés longitudinaux respectivement opposés du dispositif d'affichage (1) sont prévues ainsi que des dispositifs associés formant guides de lumière (5.1, 5.2, 5.3, 5.4).
  21. Dispositif d'affichage d'informations selon l'une des revendications précédentes, caractérisé en ce que des sources de lumière (4.1, 4.2, 4.3, 4.4) sont prévues sur tous les côtés longitudinaux du dispositif d'affichage (1), ainsi que des dispositifs associés formant guides de lumière (5.1, 5.2, 5.3, 5.4).
EP98963359A 1997-11-10 1998-11-10 Afficheur d'informations Expired - Lifetime EP1031125B1 (fr)

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DE19750766A DE19750766A1 (de) 1997-11-10 1997-11-10 Informationsanzeige
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PCT/DE1998/003384 WO1999024958A1 (fr) 1997-11-10 1998-11-10 Afficheur d'informations

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AT (1) ATE215722T1 (fr)
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DE10258313A1 (de) * 2002-12-13 2004-07-15 Patentwerk.De Gmbh Nachleucht-Anzeigeeinheit
DE102013108976A1 (de) * 2013-08-20 2015-02-26 Josef Voldrich Vorrichtung zur Übermittlung von Botschaften
DE102015001930A1 (de) 2015-02-13 2016-08-18 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Anzeigevorrichtung für ein Fahrzeug

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US1609989A (en) * 1924-09-23 1926-12-07 Rowland N Chubb Changeable sign
CH660249A5 (en) * 1982-10-21 1987-03-31 Brose Carl Gmbh Device for displaying information in public transport vehicles on one or two lines
DE3541953A1 (de) * 1985-11-27 1987-06-04 Siemens Ag Anzeigeeinheit fuer elektrische geraete
DE29723042U1 (de) * 1997-12-23 1998-03-12 Brose Carl Gmbh Anzeigevorrichtung

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ATE215722T1 (de) 2002-04-15
DE59803666D1 (de) 2002-05-08
EP1031125A1 (fr) 2000-08-30
WO1999024958A1 (fr) 1999-05-20
DE19750766A1 (de) 1999-06-02

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