WO1998010956A1 - Improved lighting means for motor vehicle dashboard - Google Patents

Improved lighting means for motor vehicle dashboard Download PDF

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Publication number
WO1998010956A1
WO1998010956A1 PCT/FR1997/001575 FR9701575W WO9810956A1 WO 1998010956 A1 WO1998010956 A1 WO 1998010956A1 FR 9701575 W FR9701575 W FR 9701575W WO 9810956 A1 WO9810956 A1 WO 9810956A1
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WO
WIPO (PCT)
Prior art keywords
color
radiation
table according
light source
dial
Prior art date
Application number
PCT/FR1997/001575
Other languages
French (fr)
Inventor
Catherine Jury
Jérôme Wroblewski
Jean-Jacques Bezard
Original Assignee
Magneti Marelli France
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 Magneti Marelli France filed Critical Magneti Marelli France
Publication of WO1998010956A1 publication Critical patent/WO1998010956A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/10—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors for dashboards
    • B60Q3/14—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors for dashboards lighting through the surface to be illuminated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/60—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects
    • B60Q3/62—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects using light guides
    • B60Q3/64—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects using light guides for a single lighting device

Definitions

  • the present invention relates to the field of dashboards for motor vehicles. Numerous motor vehicle dashboards have already been proposed. However, for many years dashboards have not experienced any significant development, especially in terms of aesthetics.
  • the lighting means used in dashboards were most often formed in the past from filament lamps and tend to be replaced today by light-emitting diodes (LEDs). To obtain a variety of colors on the dashboard dial, the following means have been proposed:
  • the present invention now aims to improve the known dashboards.
  • a dashboard of a motor vehicle comprising:
  • FIG. 1 and 2 schematically illustrate the device according to the present invention applied to a dashboard dial
  • FIG. 3 schematically illustrates the device according to the present invention applied to a dashboard needle.
  • the light source designed to emit light radiation of a first color C l, of coordinates XI, Yl on the chromaticity diagram of the CIE 1931 is referenced 10.
  • the partially transparent element in the first color Cl and comprising a fluorescent material capable of transforming part of the radiation of the first color C1 received from the light source 10 into radiation of a second color C2, of coordinates X2, Y2 on the chromaticity diagram of the CIE 1931 is referenced 20 This element 20 is interposed between the source 10 and the observer.
  • the radiation at the first color C l and the radiation at the second color C2 define in combination radiation at a third length C3, with coordinates X3, Y3 on the chromaticity diagram of the CIE 1931 of visible wave for an observer.
  • the dial is preferably formed from a transparent or translucent plastic sheet 40 printed at least two-color as shown diagrammatically in FIG. 2.
  • the first color emitted by the source 10 may be blue (430 nm), while the second color C2 can be orange (610 nm), to form a third color C3 in combination which corresponds to white.
  • the energy hv of the first color C1 must be greater than the energy of the second color C2.
  • a transparent or translucent element of the third color C3 can be placed in front of element 20, ie between element 20 and the observer.
  • the element 30 can be formed of a screen-printed area on the front face of a dial plate 40 of optically transparent or translucent plastic material, while the element 20 is screen-printed on the rear face of the same plate. , opposite the areas of the element 30.
  • Said plate 40 may also include areas 42 screen-printed with a color different from the color C2, in particular areas 42 with a color corresponding to the color C1 of the light source 10
  • the light source 10 is supplied, the user observes the areas 30 of a color C3 and the areas 42 of a color C1.
  • the areas 30 can constitute the background of the dial, while the areas 42 constitute symbols to display, or vice versa.
  • the light source 10 is preferably formed of at least one light-emitting diode.
  • the present invention makes it possible with a single color of light source 10, for example an LED of green color, to illuminate screen-printed dials of several colors, for example dials having screen-printed areas of white and green colors.
  • the present invention thus allows real color rendering without requiring mechanical separations, which are generally expensive.
  • the present invention is not limited to the particular embodiment which has just been described, but extends to any variant in accordance with its spirit.
  • the element 20 can be not only fluorescent but also phosphorescent so that the radiation of the second color C2 generated persists for some time after interruption of the radiation of the first color C1.
  • the device according to the present invention can be used to illuminate an indicator needle 50.
  • the element 20 is placed between the source 10 and the index 52 of the needle, either by example on the source 10 (reference 20a), or on an intermediate element between the source 10 and the pointer index 52, for example on the front face or the rear face of an indicator dial 40 (reference 20b or 20c) , or even directly on the index finger 52 of the needle (reference 20d).
  • An additional transparent or translucent element 30 of the third color C3 can also be placed in front of the element 20 emitting the radiation in the second color C2, between the source 10 and the index 52, for example on the source 10, on the dial 40 or on the index 52.
  • the light source 10 may not be a point source, but formed from an emitting surface, for example an electroluminescent surface.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Instrument Panels (AREA)
  • Details Of Measuring Devices (AREA)

Abstract

The invention concerns a motor vehicle dashboard comprising a light source (10) designed for emitting a luminous radiation of a first colour (C1), and an element (20) partially transparent to the first colour (C1) and comprising a fluorescent material capable of transforming part of the radiation with the first colour (C1) received from the light source (10) into a radiation of a second colour (C2), such that the radiation with the first colour (C1) and the radiation with the second colour (C2) define in combination a radiation with a third colour (C3) visible for an observer.

Description

MOYENS D'ECLAIRAGE PERFECTIONNES POUR TABLEAU DE BORD DE VEHICULE AUTOMOBILE IMPROVED LIGHTING MEANS FOR MOTOR VEHICLE DASHBOARD
La présente invention concerne le domaine des tableaux de bord de véhicules automobiles. De très nombreux tableaux de bord de véhicules automobiles ont déjà été proposés. Cependant depuis de nombreuses années les tableaux de bord n'ont pas connu d'évolution marquante, notamment sur le plan de l'esthétique.The present invention relates to the field of dashboards for motor vehicles. Numerous motor vehicle dashboards have already been proposed. However, for many years dashboards have not experienced any significant development, especially in terms of aesthetics.
Cette limitation semble due en particulier au fait que les moyens d'éclairage utilisés dans les tableaux de bord restreignent les gammes de couleur et/ou luminances disponibles.This limitation seems to be due in particular to the fact that the lighting means used in the dashboards restrict the ranges of color and / or luminances available.
Les moyens d'éclairage utilisés dans les tableaux de bord étaient formés le plus souvent par le passé de lampes à filament et tendent à être remplacés aujourd'hui par des diodes électroluminescentes (LED). Pour obtenir une variété de couleurs sur le cadran de tableaux de bord on a proposés les moyens suivants :The lighting means used in dashboards were most often formed in the past from filament lamps and tend to be replaced today by light-emitting diodes (LEDs). To obtain a variety of colors on the dashboard dial, the following means have been proposed:
- utilisation de sources de plusieurs couleurs, LED notamment, placées en regard de plages respectivement de même couleur avec un cloisonnement par des murets ou puits entre les sources et lesdites plages, - interposition d'un filtre entre la source lumineuse et une plage colorée de couleur différente du cadran,- use of sources of several colors, LED in particular, placed opposite areas respectively of the same color with a partitioning by walls or wells between the sources and said areas, - interposition of a filter between the light source and a colored area of different color of the dial,
- utilisation de plages de couleur dégradée.- use of degraded color ranges.
Cependant ces solutions connues ne donnent pas totalement satisfaction. La présente invention a maintenant pour but dé perfectionner les tableaux de bord connus.However, these known solutions are not entirely satisfactory. The present invention now aims to improve the known dashboards.
Ce but est atteint selon la présente invention grâce à un tableau de bord de véhicule automobile comprenant :This object is achieved according to the present invention thanks to a dashboard of a motor vehicle comprising:
- une source lumineuse conçue pour émettre un rayonnement lumineux d'une première couleur, et- a light source designed to emit light radiation of a first color, and
- un élément partiellement transparent à la première couleur et comportant un matériau fluorescent apte à transformer une partie du rayonnement de la première couleur reçu de la source lumineuse en un rayonnement d'une seconde couleur, de telle sorte que le rayonnement à la première couleur et le rayonnement à la seconde couleur définissent en combinaison un rayonnement à une troisième couleur visible pour un observateur.an element partially transparent to the first color and comprising a fluorescent material capable of transforming part of the radiation of the first color received from the light source into radiation of a second color, such that the radiation of the first color and radiation at the second color define in combining radiation with a third color visible to an observer.
D'autres caractéristiques, buts et avantages de la présente invention apparaîtront à la lecture de la description détaillée qui va suivre et en regard des dessins annexés donnés à titre d'exemple non limitatif et sur lesquelsOther characteristics, objects and advantages of the present invention will appear on reading the detailed description which follows and with reference to the appended drawings given by way of non-limiting example and in which
- les figures 1 et 2 illustrent schématiquement le dispositif conforme à la présente invention appliquées à un cadran de tableau de bord et- Figures 1 and 2 schematically illustrate the device according to the present invention applied to a dashboard dial and
- la figure 3 illustre schématiquement le dispositif conforme à la présente invention appliqué à une aiguille de tableau de bord.- Figure 3 schematically illustrates the device according to the present invention applied to a dashboard needle.
Sur les figures annexées la source lumineuse conçue pour émettre un rayonnement lumineux d'une première couleur C l , de coordonnées XI, Yl sur le diagramme de chromaticité de la CIE 1931, est référencée 10. L'élément partiellement transparent à la première couleur Cl et comportant un matériau fluorescent apte à transformer une partie du rayonnement de la première couleur Cl reçu de la source lumineuse 10 en un rayonnement d'une seconde couleur C2, de coordonnées X2, Y2 sur le diagramme de chromaticité de la CIE 1931 est référencé 20. Cet élément 20 est intercalé entre la source 10 et l'observateur.In the appended figures, the light source designed to emit light radiation of a first color C l, of coordinates XI, Yl on the chromaticity diagram of the CIE 1931, is referenced 10. The partially transparent element in the first color Cl and comprising a fluorescent material capable of transforming part of the radiation of the first color C1 received from the light source 10 into radiation of a second color C2, of coordinates X2, Y2 on the chromaticity diagram of the CIE 1931 is referenced 20 This element 20 is interposed between the source 10 and the observer.
Il est de préférence intégré dans un cadran du tableau de bord.It is preferably integrated into a dial on the dashboard.
Ainsi le rayonnement à la première couleur C l et le rayonnement à la seconde couleur C2 définissent en combinaison un rayonnement à une troisième longueur C3, de coordonnées X3, Y3 sur le diagramme de chromaticité de la CIE 1931 d'onde visible pour un observateur.Thus the radiation at the first color C l and the radiation at the second color C2 define in combination radiation at a third length C3, with coordinates X3, Y3 on the chromaticity diagram of the CIE 1931 of visible wave for an observer.
Le cadran est de préférence formé d'une feuille de matière plastique transparente ou translucide 40 imprimée au moins bicolore comme schématisé sur la figure 2. A titre d'exemple non limitatif, la première couleur émise par la source 10 peut être du bleu (430 nm), tandis que la seconde couleur C2 peut être de l'orange (610 nm), pour former en combinaison une troisième couleur C3 qui correspond à du blanc. L'énergie hv de la première couleur Cl doit être supérieure à l'énergie de la seconde couleur C2. Le cas échéant un élément 30 transparent ou translucide de la troisième couleur C3 peut être placé en avant de l'élément 20, c'est à dire entre l'élément 20 et l'observateur.The dial is preferably formed from a transparent or translucent plastic sheet 40 printed at least two-color as shown diagrammatically in FIG. 2. By way of nonlimiting example, the first color emitted by the source 10 may be blue (430 nm), while the second color C2 can be orange (610 nm), to form a third color C3 in combination which corresponds to white. The energy hv of the first color C1 must be greater than the energy of the second color C2. Where appropriate, a transparent or translucent element of the third color C3 can be placed in front of element 20, ie between element 20 and the observer.
En pratique, l'élément 30 peut être formé d'une plage sérigraphiée sur la face avant d'une plaque 40 de cadran en matière plastique optiquement transparente ou translucide, tandis que l'élément 20 est sérigraphié sur la face arrière de la même plaque, en regard des plages de l'élément 30. Ladite plaque 40 peut comporter par ailleurs des plages 42 sérigraphiées d'une couleur différente de la couleur C2, notamment des plages 42 d'une couleur correspondant à la couleur Cl de la source lumineuse 10. Ainsi lorsque la source lumineuse 10 est alimentée, l'utilisateur observe les plages 30 d'une couleur C3 et les plages 42 d'une couleur Cl. Les plages 30 peuvent constituer le fond du cadran, tandis que les plages 42 constituent des symboles à afficher, ou inversement.In practice, the element 30 can be formed of a screen-printed area on the front face of a dial plate 40 of optically transparent or translucent plastic material, while the element 20 is screen-printed on the rear face of the same plate. , opposite the areas of the element 30. Said plate 40 may also include areas 42 screen-printed with a color different from the color C2, in particular areas 42 with a color corresponding to the color C1 of the light source 10 Thus, when the light source 10 is supplied, the user observes the areas 30 of a color C3 and the areas 42 of a color C1. The areas 30 can constitute the background of the dial, while the areas 42 constitute symbols to display, or vice versa.
La source lumineuse 10 est de préférence formée d'au moins une diode électroluminescente.The light source 10 is preferably formed of at least one light-emitting diode.
La présente invention permet avec une seule couleur de source lumineuse 10, par exemple une LED de couleur verte, d'éclairer des cadrans sérigraphiés de plusieurs couleurs, par exemple des cadrans possédant des plages sérigraphiées de couleurs blanche et verte. La présente invention permet ainsi un rendu réel des couleurs sans exiger de séparations mécaniques, généralement coûteuses.The present invention makes it possible with a single color of light source 10, for example an LED of green color, to illuminate screen-printed dials of several colors, for example dials having screen-printed areas of white and green colors. The present invention thus allows real color rendering without requiring mechanical separations, which are generally expensive.
Bien entendu la présente invention n'est pas limitée au mode de réalisation particulier qui vient d'être décrit, mais s'étend à toute variante conforme à son esprit. Ainsi par exemple l'élément 20 peut être non seulement fluorescent mais en outre phosphorescent de sorte que le rayonnement de la seconde couleur C2 généré persiste quelque temps après interruption du rayonnement de la première couleur Cl .Of course the present invention is not limited to the particular embodiment which has just been described, but extends to any variant in accordance with its spirit. Thus for example the element 20 can be not only fluorescent but also phosphorescent so that the radiation of the second color C2 generated persists for some time after interruption of the radiation of the first color C1.
En outre comme schématisé sur la figure 3, le dispositif conforme à la présente invention peut être utilisé pour éclairer une aiguille indicatrice 50. Dans ce cas l'élément 20 est placé entre la source 10 et l'index 52 d'aiguille, soit par exemple sur la source 10 (référence 20a), ou sur un élément intermédiaire entre la source 10 et l'index 52 d'aiguille, par exemple sur la face avant ou la face arrière d'un cadran indicateur 40 (référence 20b ou 20c), ou encore directement sur l'index 52 de l'aiguille (référence 20d). Un élément additionnel 30 transparent ou translucide de la troisième couleur C3 peut également être placé en avant de l'élément 20 émettant le rayonnement à la seconde couleur C2, entre la source 10 et l'index 52, par exemple sur la source 10, sur le cadran 40 ou encore sur l'index 52.Furthermore, as shown diagrammatically in FIG. 3, the device according to the present invention can be used to illuminate an indicator needle 50. In this case the element 20 is placed between the source 10 and the index 52 of the needle, either by example on the source 10 (reference 20a), or on an intermediate element between the source 10 and the pointer index 52, for example on the front face or the rear face of an indicator dial 40 (reference 20b or 20c) , or even directly on the index finger 52 of the needle (reference 20d). An additional transparent or translucent element 30 of the third color C3 can also be placed in front of the element 20 emitting the radiation in the second color C2, between the source 10 and the index 52, for example on the source 10, on the dial 40 or on the index 52.
Selon une variante de réalisation, la source lumineuse 10 peut être non pas une source ponctuelle, mais formée d'une surface émettrice, par exemple une surface électroluminescente. According to an alternative embodiment, the light source 10 may not be a point source, but formed from an emitting surface, for example an electroluminescent surface.

Claims

R E V E N D I C A T I O N S
1. Tableau de bord de véhicule automobile caractérisé par le fait qu'il comprend :1. Motor vehicle dashboard characterized in that it comprises:
- une source lumineuse ( 10) conçue pour émettre un rayonnement lumineux d'une première couleur (Cl), et- a light source (10) designed to emit light radiation of a first color (Cl), and
- un élément (20) partiellement transparent à la première couleur (Cl ) et comportant un matériau fluorescent apte à transformer une partie du rayonnement de la première couleur (Cl ) reçue de la source lumineuse ( 10) en un rayonnement d'une seconde couleur (C2), de telle sorte que le rayonnement à la première couleur (Cl) et le rayonnement à la seconde couleur (C2) définissent en combinaison un rayonnement à une troisième couleur (C3) visible pour un observateur.- an element (20) partially transparent to the first color (Cl) and comprising a fluorescent material capable of transforming part of the radiation of the first color (Cl) received from the light source (10) into radiation of a second color (C2), so that the radiation in the first color (C1) and the radiation in the second color (C2) define in combination a radiation in a third color (C3) visible to an observer.
2. Tableau selon la revendication 1, caractérisé par le fait que la première couleur (Cl ) émise par la source (10) est du bleu, tandis que la seconde couleur (C2) est de l'orange, pour former en combinaison une troisième couleur (C3) qui correspond à du blanc.2. Table according to claim 1, characterized in that the first color (Cl) emitted by the source (10) is blue, while the second color (C2) is orange, to form in combination a third color (C3) which corresponds to white.
3. Tableau selon l'une des revendications 1 ou 2, caractérisé par le fait que l'élément (20) comportant le matériau fluorescent est intégré dans un cadran du tableau de bord. 3. Table according to one of claims 1 or 2, characterized in that the element (20) comprising the fluorescent material is integrated in a dial of the dashboard.
4. Tableau selon la revendication 3, caractérisé par le fait que le cadran est formé d'une feuille de matière plastique transparente ou translucide (40) imprimée au moins bicolore.4. Table according to claim 3, characterized in that the dial is formed of a transparent or translucent plastic sheet (40) printed at least two colors.
5. Tableau selon l'une des revendications 1 à 4, caractérisé par le fait que l'élément (20) comportant le matériau fluorescent est intercalé entre la source lumineuse ( 10) et un index (52) d'aiguille indictrice (50).5. Table according to one of claims 1 to 4, characterized in that the element (20) comprising the fluorescent material is interposed between the light source (10) and an index (52) of indicator needle (50) .
6. Tableau selon l'une des revendications 1 à 5, caractérisé par le fait qu'un élément additionnel (30) transparent ou translucide de la troisième couleur (C3) est placé en avant de l'élément (20) émettant le rayonnement à la seconde couleur. 6. Table according to one of claims 1 to 5, characterized in that an additional element (30) transparent or translucent of the third color (C3) is placed in front of the element (20) emitting the radiation at the second color.
7. Tableau selon la revendication 6, caractérisé par le fait que l'élément additionnel (30) est formé d'une plage sérigraphiée sur la face avant d'une plaque (40) de cadran en matière plastique optiquement transparente ou translucide, tandis que l'élément (20) générant le rayonnement à la seconde couleur est sérigraphié sur la face arrière de la même plaque, en regard des plages de l'élément additionnel (30). 7. Table according to claim 6, characterized in that the additional element (30) is formed of a screen-printed area on the front face of a dial plate (40) of optically transparent or translucent plastic material, while the element (20) generating the radiation in the second color is screen printed on the rear face of the same plate, opposite the ranges of the additional element (30).
8. Tableau selon la revendication 7, caractérisé par le fait que ladite plaque (40) comporte par ailleurs des plages (42) sérigraphiées d'une couleur différente de la seconde couleur (C2), notamment des plages (42) d'une couleur correspondant à la couleur (Cl) de la source lumineuse (10).8. Table according to claim 7, characterized in that said plate (40) further comprises areas (42) screen printed with a color different from the second color (C2), in particular areas (42) of a color corresponding to the color (Cl) of the light source (10).
9. Tableau selon l'une des revendications 1 à 8, caractérisé par le fait que la source lumineuse ( 10) est formée d'au moins une diode électroluminescente.9. Table according to one of claims 1 to 8, characterized in that the light source (10) is formed of at least one light emitting diode.
10. Tableau selon l'une des revendications 1 à 8, caractérisé par le fait que la source lumineuse ( 10) est formée d'une surface électroluminescente.10. Table according to one of claims 1 to 8, characterized in that the light source (10) is formed of an electroluminescent surface.
11. Tableau selon la revendication 5, caractérisé par le fait que l'élément (20) comportant le matériau fluorescent est placé dans l'une des positions définies dans le groupe suivant : sur la source lumineuse ( 10), dans une position intermédiaire par exemple en face avant ou en face arrière d'un cadran (40), ou sur l'index (52) d'aiguille. 11. Table according to claim 5, characterized in that the element (20) comprising the fluorescent material is placed in one of the positions defined in the following group: on the light source (10), in an intermediate position by example on the front or rear face of a dial (40), or on the pointer index (52).
PCT/FR1997/001575 1996-09-10 1997-09-08 Improved lighting means for motor vehicle dashboard WO1998010956A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR96/11021 1996-09-10
FR9611021A FR2753150B1 (en) 1996-09-10 1996-09-10 IMPROVED LIGHTING MEANS FOR MOTOR VEHICLE DASHBOARD

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WO1998010956A1 true WO1998010956A1 (en) 1998-03-19

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2779694B1 (en) * 1998-06-10 2000-08-11 Sagem POLYCHROME LIGHTED DASHBOARD

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2054877A5 (en) * 1969-07-30 1971-05-07 Arfina Luminous panels illuminated through their section
GB2094051A (en) * 1981-02-28 1982-09-08 Thorn Emi Ltd Display device
DE4121607A1 (en) * 1990-06-29 1992-01-16 Yazaki Corp Display device for motor vehicle - has illuminated pointer needle rotatable w.r.t. scale rate and illuminated via light conducting plates

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2054877A5 (en) * 1969-07-30 1971-05-07 Arfina Luminous panels illuminated through their section
GB2094051A (en) * 1981-02-28 1982-09-08 Thorn Emi Ltd Display device
DE4121607A1 (en) * 1990-06-29 1992-01-16 Yazaki Corp Display device for motor vehicle - has illuminated pointer needle rotatable w.r.t. scale rate and illuminated via light conducting plates

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FR2753150B1 (en) 1998-12-04
FR2753150A1 (en) 1998-03-13

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