FR2536504A1 - Device for illuminating a plate of transparent or translucent material, particularly in a vehicle instrument panel - Google Patents
Device for illuminating a plate of transparent or translucent material, particularly in a vehicle instrument panel Download PDFInfo
- Publication number
- FR2536504A1 FR2536504A1 FR8219458A FR8219458A FR2536504A1 FR 2536504 A1 FR2536504 A1 FR 2536504A1 FR 8219458 A FR8219458 A FR 8219458A FR 8219458 A FR8219458 A FR 8219458A FR 2536504 A1 FR2536504 A1 FR 2536504A1
- Authority
- FR
- France
- Prior art keywords
- plate
- lamp
- face
- transparent
- ridges
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims description 11
- 230000007423 decrease Effects 0.000 claims description 3
- 239000012780 transparent material Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 101100127888 Schizosaccharomyces pombe (strain 972 / ATCC 24843) les1 gene Proteins 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
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- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
- G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
- G02B6/0021—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
- G09F13/18—Edge-illuminated signs
- G09F2013/1804—Achieving homogeneous illumination
- G09F2013/1809—Achieving homogeneous illumination using a non-homogeneous front window
- G09F2013/1813—Achieving homogeneous illumination using a non-homogeneous front window provided with a coating showing a pattern of dots of variable density
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
Description
Dispositif d'éclairage d'une plaque de matière transparente ou translucide, en particulier dans un tableau de bord de véhicule.Device for lighting a plate of transparent or translucent material, in particular in a vehicle dashboard.
L'invention concerne un dispositif d'éclairage d'une plaque de matière transparente ou translucide, en particulier dans un tableau de bokd de véhicule, à partir d'une lampe qui est située derrière cette plaque, à une extrémité de celle-ci. The invention relates to a device for lighting a plate of transparent or translucent material, in particular in a vehicle bokd panel, from a lamp which is situated behind this plate, at one end of the latter.
L'éclairage a pour but de rendre visibles, dans l'obscurité, des symboles qui sont portés par la plaque et qui sont éclairés par la lampe. Lorsque la plaque fait partie d'un tableau de bord de véhicule, il est souvent impossible de disposer la lampe directement sous la plaque et on ne peut la placer, pour des raisons d'encombrement, qu'à une extrémité de la plaque. Dans ces conditions, seule l'extrémité de la plaque voisine de la lampe est correctement éclairée, tandis que le reste de cette plaque demeure à peu près obscur.The purpose of lighting is to make visible, in the dark, symbols which are carried by the plate and which are lit by the lamp. When the plate is part of a vehicle dashboard, it is often impossible to place the lamp directly under the plate and it can only be placed, for reasons of space, at one end of the plate. Under these conditions, only the end of the plate next to the lamp is correctly lit, while the rest of this plate remains almost dark.
Pour pallier cet inconvénient, on a déjà proposé de former des stries sur la face de la plaque qui est tournée du côté de la lampe. Ces stries ont essentiellement pour fonction d'éviter la réflexion des rayons lumineux sur cette face de la plaque et d'augmenter la quantité de lumière qui la traverse. On constate alors toutefois que la plaque est éclairée de façon irrégulière et désagréable à l'oeil, selon une succession de bandes ou lignes sombres alternées avec des bandes ou lignes claires.To overcome this drawback, it has already been proposed to form ridges on the face of the plate which is turned towards the side of the lamp. The main function of these streaks is to avoid the reflection of light rays on this face of the plate and to increase the amount of light passing through it. It is then found, however, that the plate is illuminated in an irregular manner and unpleasant to the eye, according to a succession of bands or dark lines alternated with bands or light lines.
Pour éviter cet inconvénient, on a proposé de remplacer la plaque par un élément diffuseur de lumière, dont la face extérieure est lisse et la face intérieure comporte des stries parallèles propres à réfléchir vers ladite face ex- extérieure la lumière qui pénètre dans cet élément. Lorsque l'épaisseur de l'élément est suffisamment importante, llincon dénient précité disparalt et la face extérieure de l'élément est éclairée de façon relativement uniforme.To avoid this drawback, it has been proposed to replace the plate with a light-diffusing element, the outside face of which is smooth and the inside face has parallel streaks capable of reflecting towards said ex-outside face the light which penetrates this element. When the thickness of the element is sufficiently large, the above-mentioned denial disappears and the external face of the element is lit in a relatively uniform manner.
Un tel élément, qui est en général réalisé en matière plastique transparente; doit avoir une structure particulièrement uniforme et dépourvue de défauts, et est donc difficile et très coûteux à fabriquer.Such an element, which is generally made of transparent plastic; must have a particularly uniform and flawless structure, and is therefore difficult and very expensive to manufacture.
L'invention a pour objet un dispositif d'éclairage par réfraction d'une plaque de matière transparente ou translucide, qui est simple et bon marché à réaliser et permet un éclairage adapté de cette plaque, et notamment uniforme
Selon l'invention, le dispositif d'éclairage d'une plaque de matière transparente ou translucide, en particulier dans un tableau de bord de véhicule, comprend une lampe placée derrière la plaque et une boîte à parois opaques contenant la lampe et dont une face ouverte est fermée par la plaque, et est caractérisé par un élément transparent ou translucide, parallèle à la plaque, interposé entre celle-ci et la paroi opaque opposée de la boite et s'étendant sensiblement sur toute l'étendue de la plaque à partirsde la lampe.The subject of the invention is a device for lighting by refraction of a plate of transparent or translucent material, which is simple and inexpensive to produce and allows suitable lighting of this plate, and in particular uniform.
According to the invention, the device for lighting a plate of transparent or translucent material, in particular in a vehicle dashboard, comprises a lamp placed behind the plate and a box with opaque walls containing the lamp and one face of which open is closed by the plate, and is characterized by a transparent or translucent element, parallel to the plate, interposed between the latter and the opposite opaque wall of the box and extending substantially over the entire extent of the plate from the lamp.
Avantageusement, cet élément est réalisé sous la forme d'une plaque mince dont l'épaisseur diminue progressivement de son extrémité voisine de la lampe à son extrémité opposée.Advantageously, this element is produced in the form of a thin plate whose thickness gradually decreases from its end close to the lamp to its opposite end.
Un tel élément est simple à fabriquer, son coût est faible et il assure, par diffusion de la lumière émise par la lampe, un éclairage uniforme de ladite plaque ou adapté pour faire ressortir certaines indications portées par la plaque. -
Selon une autre caractéristique de l'invention, la face de cet élément orientée du côté opposé à la plaque présente des stries paralle'les1qui s'étendent sensiblement perpendiculairement à la direction des rayons lumineux émis par la lampe et pénétrant dans l'élément.Such an element is simple to manufacture, its cost is low and it ensures, by diffusion of the light emitted by the lamp, uniform illumination of said plate or adapted to bring out certain indications carried by the plate. -
According to another characteristic of the invention, the face of this element oriented on the side opposite to the plate has paralle'les1 streaks which extend substantially perpendicular to the direction of the light rays emitted by the lamp and entering the element.
On améliore ainsi l'éclairage de la plaque en augmentant la quantité de lumière dirigée vers cette plaque à travers ledit élément.This improves the lighting of the plate by increasing the amount of light directed towards this plate through said element.
Avantageusement D la densité des stries sur cette face de l'élément peut etre uniforme, si l'on désire un éclairage uniforme de la plaque ou irrégulière, la densité des stries entant plus importante dans les zones situées en regard de parties de la plaque que l'on veut éclairer pus intensément. Advantageously D the density of the streaks on this face of the element can be uniform, if a uniform or irregular lighting of the plate is desired, the density of the streaks being greater in the zones located opposite parts of the plate than we want to light up more intensely.
Dans la description qui suit, faite à titre d'exemple, on se réfère aux dessins annexés, dans lesquels la figure 1 est une vu e schématique en coupe d'un dispositif d'éclairage selon la technique antérieure; la figure 2 est une vue semblable à la figure 1, pour une autre forme de réalisation appartenant à la technique antérieure; la figure 3 est une vue semblable aux figures 1 et 2, mais représente un dispositif d'éclairage selon l'invention; la figure 4 représente une variante de ce dispositif.In the description which follows, given by way of example, reference is made to the appended drawings, in which FIG. 1 is a schematic sectional view of a lighting device according to the prior art; Figure 2 is a view similar to Figure 1, for another embodiment belonging to the prior art; Figure 3 is a view similar to Figures 1 and 2, but shows a lighting device according to the invention; Figure 4 shows a variant of this device.
On se réfère tout d'abord à la figure 1 dans laquelle on a représenté schématiquement une plaque 10 de matière transparente ou translucide, faisant par exemple partie d'un ta bleau de bord de véhicule automobile, que l'on veut éclairer par réfraction au moyen d'une lampe 12 disposée derrière la plaque par rapport à un observateur et située sous un rebord opaque 14 de la plaque ou un cadre entourant cette plaque.First of all, reference is made to FIG. 1 in which a plate 10 of transparent or translucent material is shown diagrammatically, forming for example part of an edge panel of a motor vehicle, which one wishes to illuminate by refraction with by means of a lamp 12 disposed behind the plate with respect to an observer and situated under an opaque rim 14 of the plate or a frame surrounding this plate.
La lampe 12 est contenue dans une boite 16 à parois opaques dont la plaque 10 forme un couvercle, c'est-à-dire ferme sa face ouverte supérieure ou extérieure. La bolte 16 permet d'éviter les déperditions de lumière dans des directions au- tres que celles traversant la plaque 10. The lamp 12 is contained in a box 16 with opaque walls whose plate 10 forms a cover, that is to say closes its open upper or outer face. The bolte 16 makes it possible to avoid loss of light in directions other than those passing through the plate 10.
En général, la face supérieure ou extérieure 18 de la plaque 10 comporte des symboles que l'on veut éclairer et qui sont le plus souvent imprimés ou dessinés sur un film de matière translucide qui est collé sur cette face 18 de la plaque 10.In general, the upper or outer face 18 of the plate 10 includes symbols which one wishes to illuminate and which are most often printed or drawn on a film of translucent material which is glued to this face 18 of the plate 10.
Comme indiqué plus haut, la face inférieure ou intérieure 20 de la plaque 10 présente des stries parallèles 22 qui sont propres à favoriser une réfraction à travers la plaque 10 de la lumière émise par la lampe 12. Toutefois, la plaque 10 étant d1 épaisseur relativement faible, la face extérieure 18 de cette plaque apparat striée quand elle est éclairée, car la lumière arrivant directement sur certaines faces des stries est réfractée à travers la plaque, ce qui forme des lignes ou des bandes claires, tandis que la lumière arrivant sur les faces opposées des stries ainsi que sur les parties entre des stries consécutives est réfléchie, ce qui se traduit par la formation de bandes ou de lignes sombres sur la face extérieure de la plaque.As indicated above, the lower or inner face 20 of the plate 10 has parallel ridges 22 which are capable of promoting refraction through the plate 10 of the light emitted by the lamp 12. However, the plate 10 being relatively thick weak, the outer face 18 of this plate appears striated when it is lit, because the light arriving directly on certain faces of the ridges is refracted through the plate, which forms clear lines or bands, while the light arriving on the opposite sides of the streaks as well as on the parts between consecutive streaks is reflected, which results in the formation of dark bands or lines on the outside of the plate.
Pour éviter cet inconvénient, on a proposé de remplacer la plaque 10 par un élément 24 formant diffuseur de lumière, réalisé en matière transparente et sur la face extérieure 26 duquel est collé un film translucide portant les symboles à éclairer (figure 2). Comme dans la figure 1, la lampe 12 est placée sous un rebord 28 opaque entourant cet élément et se trouve au voisinage immédiat d'une face transversale 30 de cet-élément, de façon à ce que la plus grande quantité possible de lumière émise par la lampe soit captée par l'élément diffuseur 24. To avoid this drawback, it has been proposed to replace the plate 10 by an element 24 forming a light diffuser, made of transparent material and on the outer face 26 of which a translucent film is stuck carrying the symbols to be illuminated (FIG. 2). As in FIG. 1, the lamp 12 is placed under an opaque rim 28 surrounding this element and is located in the immediate vicinity of a transverse face 30 of this element, so that the greatest possible amount of light emitted by the lamp is picked up by the diffuser element 24.
La face inférieure ou intérieure 32 de l'élément est striée, comme dans le mode de réalisation précédent. Les trajets des rayons lumineux émis par la lampe 12 sont représentés en trait pointillé. On constate en pratique que la face supérieure 26 de l'élément diffuseur 24 est éclairée de façon uniforme et sans présenter une alternance de bandes claires et de bandes sombres, malgré la présence des stries formées sur sa face intérieure 32, lorsque l'épaisseur de l'élément 24 est suffisamment importante pour qu'il y ait diffusion de la lumière entre sa face intérieure 32 et sa face extérieure 26.Toutefois, comme indiqué plus haut, il est très difficile et très coûteux de réaliser cet élément 24 par mou- lage de matière plastique, de façon parfaitement uniforme et sans qu'il présente de bulles ou d'inclusions internes et des défauts d'homogénéité.The lower or inner face 32 of the element is ridged, as in the previous embodiment. The paths of the light rays emitted by the lamp 12 are shown in dotted lines. It can be seen in practice that the upper face 26 of the diffuser element 24 is uniformly lit and without having an alternation of light bands and dark bands, despite the presence of the streaks formed on its inner face 32, when the thickness of the element 24 is sufficiently large so that there is diffusion of light between its inner face 32 and its outer face 26. However, as indicated above, it is very difficult and very expensive to produce this element 24 by lage of plastic material, perfectly uniform and without it has bubbles or internal inclusions and homogeneity defects.
On se réfère maintenant à la figure 3, qui représente schématiquement un dispositif d'éclairage selon l'invention.Referring now to Figure 3, which schematically shows a lighting device according to the invention.
La plaque 40 à éclairer par réfraction, par exemple dans un tableau de bord de véhicule, est en matière translucide ou en matière transparente et comporte, sur sa face extérieure 42, des symboles à éclairer, formés par exemple sur un film translucide collé sur cette face 42. La plaque 40 est entourée d'un rebord ou cadre opaque 44 sous lequel se trouve une lampe 12 contenue dans une boîte 46 à parois opaques dont la plaque 40 forme le couvercle.The plate 40 to be lit by refraction, for example in a vehicle dashboard, is made of translucent material or of transparent material and comprises, on its outer face 42, symbols to be lit, formed for example on a translucent film bonded to this face 42. The plate 40 is surrounded by an opaque rim or frame 44 under which there is a lamp 12 contained in a box 46 with opaque walls, the plate 40 forming the cover.
Entre la plaque 40 et la paroi 48 de la boîte 46 opposée à cette plaque, est interposé un élément 50 de matière transparente, se présentant sous forme d'une plaque de faible épaisseur, qui s'étend parallèlement à la plaque 40 et à la paroi 48 sur sensiblement toute l'étendue de la plaque 40, à partir de la lampe 12. L'épaisseur de l'élément 50 diminue progressivement de son extrémité voisine de la lampe 12 jus gulà son extrémité opposée. La face 52 de cet élément, qui est orientée du côté opposé à la plaque 40, c'est-à-dire qui est tournée vers la paroi 48 de la boite 46, présente des stries transversales parallèles 54 qui s'étendent sensiblement perpendiculairement à la direction des rayons lumineux émis par la lampe 12 et pénétrant dans l'élément 50.Comme dans les modes de réalisation précédents, ces stries ont pour but de réfléchir vers la plaque 40 la lumière émise par la lampe 12.Between the plate 40 and the wall 48 of the box 46 opposite this plate, is interposed an element 50 of transparent material, in the form of a thin plate, which extends parallel to the plate 40 and to the wall 48 over substantially the whole extent of the plate 40, starting from the lamp 12. The thickness of the element 50 gradually decreases from its end close to the lamp 12 jus gulà its opposite end. The face 52 of this element, which is oriented on the side opposite to the plate 40, that is to say which is turned towards the wall 48 of the box 46, has parallel transverse ridges 54 which extend substantially perpendicular to the direction of the light rays emitted by the lamp 12 and entering the element 50. As in the previous embodiments, these streaks are intended to reflect towards the plate 40 the light emitted by the lamp 12.
On constate que la face extérieure a2 de la plaque 40 est alors éclairée de façon uniforme, sans présenter une alternance de bandes sombres et de bandes claires.It can be seen that the outer face a2 of the plate 40 is then uniformly lit, without presenting an alternation of dark bands and light bands.
Les stries 54 peuvent être à répartition ou distribution uniforme sur la face inférieure 52 de l'élément 50 si l'on désire que toute la plaque 40 soit éclairée de façon uniforme Par contre, si l'on désire que certaines zones de cette plaque, correspondant par exemple à certains symboles portés par la face extérieure 42, soient éclairées de façon plus intense, les stries 54 sont formées de façon plus serrée ou plus dense en regard de ces zones. Si des parties de la plaque 40 doivent être éclairées de façon plus faible, les zones DQrresPDndantes de la face 52 de l'élément 50 sont formees avec des stries plus espacées les unes des autres ou sont éventuellement dépourvues de stries.L'élément 50, ainsi que la plaque 40, peuvent être réalisés en une matière plastique transparente commercialisée sous la marque "Plexiglasl.The ridges 54 can be of uniform distribution or distribution on the underside 52 of the element 50 if it is desired that the entire plate 40 be uniformly lit. On the other hand, if it is desired that certain zones of this plate, corresponding for example to certain symbols carried by the outer face 42, are more intensely lit, the streaks 54 are formed tighter or denser in relation to these areas. If parts of the plate 40 are to be dimmed, the zones DQrresPDndantes of the face 52 of the element 50 are formed with streaks spaced apart from each other or are possibly devoid of streaks. as well as the plate 40, can be made of a transparent plastic material sold under the brand "Plexiglasl.
Pour fixer les idées, on précisera, à titre d'exemple, que la plaque 40 peut avoir une longueur d'environ 15 à 20 centimètres pour une largeur de quelques centimètres, et que l'épaisseur de l'élément 50 est de 5 millimètres au voisinage de la lampe 12 et de 2 millimètres à son extrémité opposée. Les stries formées sur la face inférieure 52 de l'élément 50 sont des dièdres rectilignes ayant par exemple un angle au sommet de 60 et une profondeur d'environ 1 mm. To fix the ideas, it will be specified, by way of example, that the plate 40 can have a length of approximately 15 to 20 centimeters for a width of a few centimeters, and that the thickness of the element 50 is 5 millimeters. in the vicinity of the lamp 12 and 2 millimeters at its opposite end. The ridges formed on the underside 52 of the element 50 are rectilinear dihedra having for example an apex angle of 60 and a depth of about 1 mm.
Dans l'exemple de réalisation représenté en figure 3, laplaque 40 à éclairer et l'élément 50 ont une forme incurvée-, avec un rayon de courbure relativement important. L'invention s'applique également au cas où la plaque 40 est plane. In the embodiment shown in FIG. 3, the plate 40 to be lit and the element 50 have a curved shape, with a relatively large radius of curvature. The invention also applies to the case where the plate 40 is planar.
L'élément diffuseur 50 est, en raison de son épaisseur faible, facile et peu coûteux à fabriquer sans défauts d'homo généité. The diffuser element 50 is, because of its small thickness, easy and inexpensive to manufacture without homogeneity defects.
La figure 4 représente une variante du dispositif de la figure 3, dans laquelle la face 2 de l'élément 50 est lisse et dépourvue de stries. Cette variante permet également un bon éclairage de la plaque 40. 4 shows a variant of the device of Figure 3, in which the face 2 of the element 50 is smooth and devoid of streaks. This variant also allows good lighting of the plate 40.
Claims (10)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8219458A FR2536504A1 (en) | 1982-11-19 | 1982-11-19 | Device for illuminating a plate of transparent or translucent material, particularly in a vehicle instrument panel |
| ES1983284537U ES284537Y (en) | 1982-11-19 | 1983-11-18 | LIGHTING DEVICE FOR A TRANSPARENT OR TRANSLUCENT PLATE OF MATTER, IN PARTICULAR IN A VEHICU-LO DASHBOARD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8219458A FR2536504A1 (en) | 1982-11-19 | 1982-11-19 | Device for illuminating a plate of transparent or translucent material, particularly in a vehicle instrument panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2536504A1 true FR2536504A1 (en) | 1984-05-25 |
Family
ID=9279360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8219458A Pending FR2536504A1 (en) | 1982-11-19 | 1982-11-19 | Device for illuminating a plate of transparent or translucent material, particularly in a vehicle instrument panel |
Country Status (2)
| Country | Link |
|---|---|
| ES (1) | ES284537Y (en) |
| FR (1) | FR2536504A1 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4729185A (en) * | 1985-01-30 | 1988-03-08 | Kabushiki Kaisha Toshiba | Display panel illumination device |
| FR2612854A1 (en) * | 1987-03-23 | 1988-09-30 | Koito Mfg Co Ltd | SIGNALING DEVICE FOR AUTOMOTIVE SIGNALING PLATE |
| EP0309764A1 (en) * | 1987-09-03 | 1989-04-05 | TA TRIUMPH-ADLER Aktiengesellschaft | Device for illuminating transparent display areas |
| US4874228A (en) * | 1987-03-24 | 1989-10-17 | Minnesota Mining And Manufacturing Company | Back-lit display |
| US5079675A (en) * | 1990-11-08 | 1992-01-07 | Deilaito Co., Ltd. | Surface illuminating apparatus |
| EP0732679A1 (en) * | 1995-03-16 | 1996-09-18 | Hayashi Telempu Co., Ltd. | Display panel for instruments installed in vehicles |
| EP0881427A1 (en) * | 1997-05-27 | 1998-12-02 | THOMSON multimedia | Improvement to backlight system for transmissive electro-optical modulator |
| EP1843180A1 (en) * | 2006-04-05 | 2007-10-10 | Calsonic Kansei Corporation | Lightning device |
| WO2008092578A1 (en) * | 2007-01-29 | 2008-08-07 | Johnson Controls Gmbh | Combination display instrument and optical wave guide structure for a motor vehicle display instrument |
| DE102006047887B4 (en) * | 2005-11-23 | 2024-02-29 | Volkswagen Ag | Roof window for a motor vehicle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE905448C (en) * | 1951-12-21 | 1954-03-01 | Grundig Max | Arrangement for illuminating flat surfaces, especially scales u. like |
| GB1130601A (en) * | 1965-04-30 | 1968-10-16 | Calorific Appliances Ltd | Illuminated display apparatus |
| US3561145A (en) * | 1968-03-05 | 1971-02-09 | United States Radium Corp | Light distributing lens system |
| US3853088A (en) * | 1972-06-14 | 1974-12-10 | Bendix Corp | Arrangement for supporting a symbol in an illuminated instrument |
| DE2557238A1 (en) * | 1975-12-19 | 1977-06-30 | Vdo Schindling | Scale illumination for dual purpose dashboard instrument - with light guide lenses for separate symbols and lamps on coaxial dial glasses |
| FR2346795A1 (en) * | 1976-04-01 | 1977-10-28 | Regie Autonome Transports | Glazed illuminated display panel - contains as diffusor a surface-treated highly refractive transparent plate, pref. of PMMA, lit from the edge |
-
1982
- 1982-11-19 FR FR8219458A patent/FR2536504A1/en active Pending
-
1983
- 1983-11-18 ES ES1983284537U patent/ES284537Y/en not_active Expired
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE905448C (en) * | 1951-12-21 | 1954-03-01 | Grundig Max | Arrangement for illuminating flat surfaces, especially scales u. like |
| GB1130601A (en) * | 1965-04-30 | 1968-10-16 | Calorific Appliances Ltd | Illuminated display apparatus |
| US3561145A (en) * | 1968-03-05 | 1971-02-09 | United States Radium Corp | Light distributing lens system |
| US3853088A (en) * | 1972-06-14 | 1974-12-10 | Bendix Corp | Arrangement for supporting a symbol in an illuminated instrument |
| DE2557238A1 (en) * | 1975-12-19 | 1977-06-30 | Vdo Schindling | Scale illumination for dual purpose dashboard instrument - with light guide lenses for separate symbols and lamps on coaxial dial glasses |
| FR2346795A1 (en) * | 1976-04-01 | 1977-10-28 | Regie Autonome Transports | Glazed illuminated display panel - contains as diffusor a surface-treated highly refractive transparent plate, pref. of PMMA, lit from the edge |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4729185A (en) * | 1985-01-30 | 1988-03-08 | Kabushiki Kaisha Toshiba | Display panel illumination device |
| FR2612854A1 (en) * | 1987-03-23 | 1988-09-30 | Koito Mfg Co Ltd | SIGNALING DEVICE FOR AUTOMOTIVE SIGNALING PLATE |
| US4874228A (en) * | 1987-03-24 | 1989-10-17 | Minnesota Mining And Manufacturing Company | Back-lit display |
| EP0309764A1 (en) * | 1987-09-03 | 1989-04-05 | TA TRIUMPH-ADLER Aktiengesellschaft | Device for illuminating transparent display areas |
| US5079675A (en) * | 1990-11-08 | 1992-01-07 | Deilaito Co., Ltd. | Surface illuminating apparatus |
| EP0732679A1 (en) * | 1995-03-16 | 1996-09-18 | Hayashi Telempu Co., Ltd. | Display panel for instruments installed in vehicles |
| EP0881427A1 (en) * | 1997-05-27 | 1998-12-02 | THOMSON multimedia | Improvement to backlight system for transmissive electro-optical modulator |
| FR2764086A1 (en) * | 1997-05-27 | 1998-12-04 | Thomson Multimedia Sa | IMPROVEMENT IN THE REAR LIGHTING SYSTEM FOR A TRANSMISSIBLE ELECTRO-OPTIC MODULATOR |
| US6023550A (en) * | 1997-05-27 | 2000-02-08 | Thomson Multimedia | Backlight system for transmissive electro optical modulator |
| DE102006047887B4 (en) * | 2005-11-23 | 2024-02-29 | Volkswagen Ag | Roof window for a motor vehicle |
| EP1843180A1 (en) * | 2006-04-05 | 2007-10-10 | Calsonic Kansei Corporation | Lightning device |
| US7503666B2 (en) | 2006-04-05 | 2009-03-17 | Calsonic Kansei Corporation | Lighting device |
| WO2008092578A1 (en) * | 2007-01-29 | 2008-08-07 | Johnson Controls Gmbh | Combination display instrument and optical wave guide structure for a motor vehicle display instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| ES284537Y (en) | 1986-04-01 |
| ES284537U (en) | 1985-07-01 |
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