Lighting device and system for motor vehicle using a surface light source

Abstract

A lighting device including at least one surface light source and a support for this, wherein the surface light source includes a fixing element which has a T-shaped cross-section, and wherein the support includes a receiving part for the fixing element, a cross-section through the receiving part having a shape complementary to the cross-section of the fixing element. In the lighting device according to the invention, the fixing element includes an upright and a head, the upright extending from a lower face of the surface light source, the upright and the head together with this lower face delimiting at least one engagement groove for the receiving part of the support. Application to motor vehicles.

Claims

1. Lighting device comprising at least one surface light source and a support for this, wherein the surface light source comprises a fixing element which extends in a longitudinal direction and has a T-shaped cross-section, and wherein the support comprises a receiving part for the fixing element, a cross-section through the receiving part having a shape complementary to the cross-section of the fixing element, the lighting device comprising at least one stop of the fixing element against the receiving part, the stop being arranged on an end face of the fixing element that intersects the longitudinal direction, wherein the fixing element comprises an upright capped with a head, the upright extending from a lower face of the surface light source, the upright and the head together with this lower face of the surface light source delimiting at least one engagement groove for the receiving part of the support.

2. Lighting device according to claim 1, wherein the stop comprises at least one blocking wall which extends substantially perpendicularly to the longitudinal direction of the fixing element.

3. Lighting device according to claim 1, wherein the receiving part comprises a guide portion for the fixing element and an engagement portion for the fixing element, the guide portion and the engagement portion being situated in the extension of each other in the main extension direction of the receiving part.

4. Lighting device according to claim 3, wherein the engagement portion extends protruding from the guide portion in an elevation direction perpendicular to the main extension direction.

5. Lighting device according to claim 3, wherein the engagement portion comprises an upper wall wherein a slot is arranged, the greatest dimension of which extends substantially in the main extension direction of the receiving part.

6. Lighting device according to claim 5, wherein the engagement portion comprises a first side wall, a second side wall and an inlet wall which, together with the upper wall, delimit a receiving cavity for the fixing element of the surface light source.

7. Lighting device according to t claim 6, wherein the inlet wall extends at the intersection of the guide portion and the engagement portion in the main extension direction, substantially perpendicularly to this main extension direction.

8. Lighting and/or signalling system for a motor vehicle comprising at least one lighting device according to claim 1.

9. Lighting and/or signalling system according to claim 8, wherein the lighting and/or signalling system comprises a plurality of lighting devices and a support common to the plurality of lighting devices.

10. Lighting and/or signalling system according to claim 9, wherein the lighting and/or signalling system comprises a monobloc piece configured to block at least two surface light sources on the support.

11. Lighting device according to claim 2, wherein the receiving part comprises a guide portion for the fixing element and an engagement portion for the fixing element, the guide portion and the engagement portion being situated in the extension of each other in the main extension direction of the receiving part.

12. Lighting device according to claim 2, wherein the receiving part comprises a guide portion for the fixing element and an engagement portion for the fixing element, the guide portion and the engagement portion being situated in the extension of each other in the main extension direction of the receiving part.

13. Lighting device according to claim 4, wherein the engagement portion comprises an upper wall wherein a slot is arranged, the greatest dimension of which extends substantially in the main extension direction of the receiving part.

14. Lighting device according to claim 5, wherein the lighting device comprises a pre-assembly hook for the surface light source on the support, formed by a lug protruding from a side wall of the engagement portion and a flexible tab arranged on the fixing element.

15. Lighting device according to claim 6, wherein the lighting device comprises a pre-assembly hook for the surface light source on the support, formed by a lug protruding from a side wall of the engagement portion and a flexible tab arranged on the fixing element.

16. Lighting device according to claim 7, wherein the lighting device comprises a pre-assembly hook for the surface light source on the support, formed by a lug protruding from a side wall of the engagement portion and a flexible tab arranged on the fixing element.

17. Lighting and/or signalling system for a motor vehicle comprising at least one lighting device according to claim 1.

18. Lighting device comprising at least one surface light source and a support for this, wherein the surface light source comprises a fixing element which extends in a longitudinal direction and has a T-shaped cross-section, wherein the support comprises a receiving part for the fixing element, a cross-section through the receiving part having a shape complementary to the cross-section of the fixing element, the lighting device comprising at least one stop of the fixing element against the receiving part, the stop being arranged on an end face in the extension of the fixing element that intersects the longitudinal direction, wherein the receiving part comprises a guide portion for the fixing element and an engagement portion for the fixing element, the guide portion and the engagement portion being situated in the extension of each other in the main extension direction of the receiving part, and wherein the lighting device comprises a pre-assembly hook for the surface light source on the support, formed by a lug protruding from a side wall of the engagement portion and a flexible tab arranged on the fixing element.

19. Lighting device comprising at least one surface light source and a support for this, wherein the surface light source comprises a fixing element which extends in a longitudinal direction and has a T-shaped cross-section, wherein the support comprises a receiving part for the fixing element, a cross-section through the receiving part having a shape complementary to the cross-section of the fixing element, the lighting device comprising at least one stop of the fixing element against the receiving part, the stop being arranged on an end face in the extension of the fixing element that intersects the longitudinal direction, wherein the receiving part comprises a guide portion for the fixing element and an engagement portion for the fixing element, the guide portion and the engagement portion being situated in the extension of each other in the main extension direction of the receiving part, wherein the engagement portion extends protruding from the guide portion in an elevation direction perpendicular to the main extension direction, and wherein the lighting device comprises a pre-assembly hook for the surface light source on the support, formed by a lug protruding from a side wall of the engagement portion and a flexible tab arranged on the fixing element.

Description

(1) Further characteristics, details and advantages of the invention will arise more clearly from reading the description, given below for information, in relation to the attached drawings in which:

(2) FIG. 1 is a perspective view of an organic light-emitting diode of a lighting device according to the invention,

(3) FIG. 2 is a perspective view of a receiving part of a support of the organic light-emitting diode of the lighting device according to the invention,

(4) FIG. 3 is a cross-sectional view of a lighting device according to the invention,

(5) FIG. 4 is a perspective view of a variant embodiment of an organic light-emitting diode of a lighting device according to the invention,

(6) FIG. 5 is a view from below of a detail of the lighting device according to the invention as shown on FIG. 4,

(7) FIG. 6 is a perspective view of a lighting device as illustrated by FIGS. 4 and 5 in which the organic light-emitting diode is assembled with its support,

(8) FIG. 7 is an exploded view of the various components of a lighting and/or signalling system according to the invention, and

(9) FIG. 8 is a rear view of a lighting and/or signalling system according to the invention.

(10) It should first be noted that although the figures present the invention in detail for its implementation, these figures may naturally serve to better define the invention where applicable.

(11) Also, to simplify reading, the organic light-emitting diodes are designated below under the name OLED diodes.

(12) With reference to the various figures, and as described above, a lighting device according to the invention comprises at least one OLED diode 100 and a support 200 for fixing this. The OLED diode 100 and the support 200 are mechanically connected by a fixing element 1 arranged on the OLED diode 100, and by a receiving part 2 for the fixing element 1 arranged on the support 200.

(13) With reference in particular to FIG. 1, an OLED diode 100 of a lighting device according to the invention is formed by a part 110 emitting light rays, which is attached to a base 120 advantageously produced by injection of synthetic material into a mould. The OLED diode 100 also comprises a connecting element 130 for its electrical connection to a supply assembly, not shown on FIG. 1. The connecting element 130 is for example a flexible printed circuit board or connection wires.

(14) The emitter part 110 of the OLED diode 100, formed from the assembly of organic layers, electrodes and substrates, according to the embodiment shown in FIG. 1, has the general form of a flat plate, a lower face 111 of which is coupled to an upper face 121 of the base 120. The lower face 111 of the emitter part 110 is here defined as being the face opposite the emitter face 112 of the OLED diode 100, from which the light rays generated by the OLED diode 100 emerge, also referred to in the description below as the upper face 112 of the OLED diode 100.

(15) As FIG. 1 shows, the fixing element 1 of the OLED diode 100 comprises an upright 10 which extends from the lower face 101 of the base 120. The lower face 101 of the base 120 is here defined as being the face of this base opposite the upper face 121 via which it is coupled to the emitter part 110 of the OLED diode 100. By extension, the lower face 101 of the base 120 is designated below as the lower face of the OLED diode 100. Advantageously, the upright 10 of the fixing element 1 extends opposite the upper face 112 of the OLED diode 100, in the Z direction or height substantially perpendicular to the lower face 101 of the OLED diode 100. Along the lower face 101 of the OLED diode 100, the upright 10 of the fixing element 1 extends in a main extension direction X, called the longitudinal direction in the description which follows. The dimensions in this longitudinal direction are designated below as lengths.

(16) According to the variant embodiment illustrated more particularly by the figures, the upright 10 of the fixing element 1 takes the general form of a rectangular parallelepiped comprising two side faces, respectively 10a, 10b, substantially parallel to each other and perpendicular to the lower face 101 of the OLED diode 100. More precisely, the side faces 10a, 10b of the upright 10 extend in a plane substantially parallel to the height Z and to the longitudinal direction X defined above. As has just been defined, the upright 10 of the fixing element 1 in particular has a longitudinal plane of symmetry P1 defined by said longitudinal direction X and parallel to the side faces 10a, 10b, the longitudinal plane of symmetry P1 being a central longitudinal plane of the upright 10 in the transverse direction Y or width, perpendicular to the longitudinal direction X and the height Z defined above. The upright 10 also comprises, in the longitudinal direction X, an end wall 10d called the front end, and an end wall 10e called the rear end. The front end 10d and the rear end 10e are substantially perpendicular to the side walls 10a, 10b. With reference to FIG. 1, the front end 10d is the end of the upright 10 which is closest to the connecting element 130 of the OLED diode 100, the rear end 10e being the end of the upright 10 which is furthest away from this connecting element 130. By extension, the front end 10d and the rear end 10e of the upright 10 are designated below as the front end and the rear end respectively of the fixing element 1, and the terms “front” and “rear” are applied with reference to the longitudinal direction X.

(17) The fixing element 1 also comprises a head 11 which extends substantially parallel to the lower face 101 of the OLED diode 100 on either side of the upright 10 in the width Y. It is noted that the fixing element 1 is advantageously formed as a single piece from the same material as the base 120. According to the embodiment illustrated more particularly on the figures, the head 11 has the form of a substantially parallelepipedic plate arranged symmetrically relative to the longitudinal plane P1.

(18) The result of the respective configuration of the upright 10 and head 11 is that these two elements, in cross-section along a cross-section plane P2 perpendicular to the previously defined longitudinal direction X, form an inverted T-shape, the vertical branch of which is formed by the upright 10 and the horizontal branch of which is formed by the head 11. This inverted T extends below the base 120 of the OLED diode 100, substantially perpendicularly to the lower face 101 thereof. The term “below” here means that this inverted T-shape extends opposite the emitter part 110 of the OLED diode 100, relative to the base 120 and in the height Z previously defined. This inverted T-shape is visible more particularly on FIG. 3 which shows a cross-section of the lighting device according to the invention in said cross-section plane P2. In other words, the head 11 on each side of the upright 10, together with each side face 10a, 10b of the latter and the lower face 101 of the OLED diode 100, delimits an engagement groove respectively referenced 3a, 3b which extends in the longitudinal direction X.

(19) As FIG. 1 shows, the lighting device comprises a stop 12 of the fixing element 1 against the receiving part 2. Such a stop 12 limits the relative movement between this fixing element 1 and the receiving part 2 in the longitudinal direction X of the fixing element 1. The stop 12 is made at the end of the fixing element 1, more particularly at the end of the T-shaped part of this fixing element 1. This stop 12 longitudinally closes at least one of the grooves 3a, 3b.

(20) In one embodiment, the stop 12 comprises at least one blocking wall 12a which extends from the lower face 101 of the OLED diode 100, substantially perpendicularly to the upright 10 and the head 11. The blocking wall 12a thus extends in a plane substantially parallel to both the previously defined height Z and the width Y. More precisely, the blocking wall 12a extends to the rear end 10e of the upright 10 which is furthest away from the electrical connecting element 130 of the OLED diode 100. Advantageously, the blocking wall 12a forms a closure of the engagement grooves 3a, 3b at the end 10e of the upright 10. As an example, the width of the blocking wall 12a is at least equal to the width of the head 11.

(21) With reference to FIG. 2, the receiving part 2 of the support 200 of the lighting device according to the invention comprises a first portion 21 called the guide portion, and a second portion 22 called the engagement portion.

(22) According to the embodiment illustrated more particularly in this figure, the guide portion 21 extends protruding from a surface of the support 200 from which the receiving part 2 emerges, in a direction B of the receiving part 2 called the elevation direction. The guide portion 21 is formed by a substantially flat upper wall 21a and two side walls 21b, 21c which are substantially parallel to each other and perpendicular to the upper wall 21a. The side walls 21b, 21c of the guide portion 21 in particular extend substantially parallel to the elevation direction B. The upper wall 21a of the guide portion extends between the edges of the side walls 21b, 21c opposite the edges by which the side walls are attached to the surface of the support 200.

(23) The invention provides that the engagement portion 22 extends from the guide portion 21 protruding in said elevation direction B. The invention also provides that the guide portion 21 and the engagement portion 22 extend in the extension of each other in a main extension direction A of the receiving part 2, perpendicular to said elevation direction B. More precisely, the engagement portion 22 extends side by side with the guide portion 21 in the main extension direction A of the receiving part 2, from one end of the guide portion 21. It is understood here that the term “side by side” means that the engagement portion 22 is attached at one of its ends in said main extension direction A to one end of the guide portion 21 in this main extension direction A. According to the embodiment variant illustrated more particularly in FIG. 2, the guide portion 21 and the engagement portion 22 each have the general form of a substantially parallelepipedic block, the longest side of which extends in the main extension direction A. This variant embodiment, which is not exclusive, is particularly advantageous with regard to production of the support 200, in that the production of substantially parallelepipedic forms of the receiving part 2 by injection of a synthetic material into a mould, does not require the use of compartments in this mould. This allows a reduction in the costs of production of the support 200.

(24) The engagement portion 22 is formed by an upper wall 23 and two side walls 24a, 24b which are substantially parallel to each other and perpendicular to the upper wall 23 of the engagement portion 22. It also comprises an inlet wall 25 at its end via which it is attached to the guide portion 21 and, at its opposite end in the main extension direction A, an end wall 26 substantially parallel to the inlet wall 25. The inlet wall 25, upper wall 23, side walls 24a, 24b and optionally the end wall 26 of the engagement portion 22 together delimit a receiving cavity 220 for the fixing element 1 of the OLED diode 100.

(25) According to the invention, the receiving cavity 220 for the fixing element 1 opens in the inlet wall 25 of the engagement portion 22 into an opening 250. According to the embodiment variant illustrated more particularly in FIG. 2, the opening 250 is extended on the upper wall 21a of the guide portion 21 into a presentation orifice 210, the purpose of which will be specified below.

(26) It is noted that according to the variant embodiment illustrated more particularly by the figures, the side walls 21c and 21a respectively of the guide portion 21 and the engagement portion 22 form a single and same wall, in the same way as the side walls 21b and 24b respectively of the guide portion 21 and the engagement portion 22. In other words, the dimension between the side walls 21c, 21b of the guide portion 21, measured perpendicularly to the main extension direction A of the receiving part 2, is substantially equal to the dimension between the side walls 24a, 24b of the engagement portion 22, measured perpendicularly to said main extension direction A.

(27) The upper wall 23 of the engagement portion 22 comprises a slot 230 which extends in the main extension direction A of the receiving part 2. The slot 230 is limited by two side edges 230a, 230b substantially parallel to each other and to the main extension direction A. The slot 230 opens in the inlet wall 25 into an engagement opening 231. Advantageously, the slot 230 is centred on the upper wall 23 of the engagement portion 22, i.e. it extends symmetrically on either side of the plane of symmetry P3 defined by the main extension direction A of the receiving part 2 and by the elevation direction B defined above. The plane of symmetry P3 is a central longitudinal plane of the upper wall 23 in a transverse direction C perpendicular to the elevation direction B and to the main extension direction A.

(28) At its end opposite the engagement opening 231 in the main extension direction A of the receiving part 2, the slot 230 is closed by an end edge 230c substantially perpendicular to the side edges 230a, 230b delimiting the slot 230. In other words, the slot 230 forms a substantially rectangular incision in the upper wall 23 of the engagement portion 22, the long side of which is oriented in the previously defined main extension direction A.

(29) It is noted that a width 11 between the side edges 230a, 230b of the slot 230, measured perpendicularly to the main extension direction A, is slightly greater than the width 12 of the upright 10 of the fixing element 1 measured in the same direction. Also, a length of the slot 230 in the main extension direction A is substantially equal to a length of the upright 10 of the fixing element 1. It is understood here that these dimensions are defined such that the upright 10 of the fixing element 1 may be fully inserted easily but without excessive play in the slot 230.

(30) As FIG. 3 shows, each side wall 24a, 24b of the engagement portion 22, on its inner face situated on the side of the inner volume of the receiving cavity 220, comprises at least one shoulder, or two shoulders referenced 27a, 27b, which extends or extend substantially between the inlet wall and the end wall which longitudinally delimit the receiving cavity 220. As FIG. 3 shows more precisely, the shoulders 27a, 27b are advantageously arranged from the inner face 23b of the upper wall 23 situated inside the receiving cavity 220. Each shoulder 27a, 27b forms a constriction of the inner volume of the receiving cavity 220. More precisely, a width 13 between the shoulders 27a and 27b, measured perpendicularly to the main extension direction A, is slightly less than a width 13 between the inner faces of the side walls 24a, 24b of the engagement portion 22, measured in the same direction.

(31) The width 13 measured between the shoulders 27a and 27b is greater than the width of the head 11 measured in the width Y of the fixing element 1. It must be understood here that this dimension is defined such that the head 11 of the fixing element 1 may be inserted between the shoulders 27a, 27b easily but without excessive play, in particular in the width direction of said head 11.

(32) The result of the above is that, in a cross-sectional plane substantially perpendicular to the main extension direction A, the slot 230 and receiving cavity 220 have a shape substantially complementary to the inverted T-shape of the assembly formed by the upright 10 and the head 11 of the fixing element 1.

(33) With reference to FIG. 3, the process of assembly of the OLED diode 100 with its support 200 is as follows.

(34) In a first assembly step, the fixing element 1 of the OLED diode 100 is engaged in the previously defined receiving cavity 220. To facilitate this guidance, the fixing element 1 may be brought to rest by its head 11 against the upper wall 21a of the guide portion 21. The front end 10d of the upright 10 of the fixing element 1 is thus engaged in the opening 250 of the inlet wall 25. As a result of the respective configurations and dimensions of the slot 230 and fixing element 1, the upright 10 then engages in the engagement opening 231 via which the slot 230 opens in the inlet wall 25. In this operation, the upper wall 21a of the guide portion 21 and the presentation orifice 210 arranged therein play a guiding role and facilitate the engagement of the fixing element 1 in the receiving cavity 220.

(35) The fixing element 1 and the OLED diode 100 which carries it are then slid in the main extension direction A of the receiving part 2, in the direction of the end wall 26 of the receiving cavity 220 and of the end edge 230c of the slot 230. In this longitudinal sliding movement, because of the respective dimensions of the slot 230 and the upright 10 of the fixing element 1, the side edges 230a, 230b of the slot 230 each engage in an engagement groove 3a, 3b of the fixing element 1. In other words, each engagement groove 3a, 3b forms a rail in which part of the upper wall 23 of the engagement portion 22 engages. It is noted that the lower face 101 of the OLED diode 100 is then substantially resting against the outer face 23a of the upper wall 23 of the engagement portion 22, the outer face 23a being the face of the upper wall situated outside the receiving cavity 220.

(36) In said sliding movement, the side walls of the head 11 of the fixing element 1 are guided by the shoulders 27a, 27b arranged in the receiving cavity 220. The OLED diode 100 is therefore guided, by cooperation of its fixing element 1 with the slot 230 and advantageously the shoulders 27a, 27b respectively, in its sliding in the receiving part 2.

(37) This sliding movement in the main extension direction A continues until the front end 10d of the upright 10 of the fixing element 1 meets the end edge 230c of the slot 230. Advantageously, the dimensions and in particular the width of the stop 12, and the dimension of the opening 250 in the previously defined transverse direction C, are defined such that the stop 12 substantially fully closes this opening 230, thus closing the receiving cavity 220. Such an arrangement limits any leakage of light between the technical part and the visible part of the lighting system according to the invention.

(38) When the sliding movement of the fixing element 1 along the slot 230 is terminated, i.e. when the front end 10d of the upright 10 of the fixing element 1 comes to stop against the end edge 230c of the slot 230, the OLED diode 100 is assembled with the support 200 via the receiving part 2, thus forming the lighting device according to the invention. In this position, the longitudinal direction X of the fixing element 1 and the main extension direction A of the receiving part 2 are congruent or substantially congruent. Similarly, the direction in which the receiving part 2 extends protruding from the support 200 is congruent or substantially congruent with the height Z of the fixing element 1. The longitudinal direction X, the height Z and the width Y of the fixing element 1 therefore become respectively the longitudinal direction, height and width of the lighting device according to the invention. It also follows that the planes of symmetry P1 and P3 previously defined are congruent or substantially congruent.

(39) In this assembled position of the lighting device according to the invention illustrated on FIG. 3, the OLED diode 100 is blocked relative to the receiving part 2 in various ways and directions: the engagement of the side edges 230a, 230b of the slot 230 in the engagement grooves 3a, 3b of the fixing element 1 achieves a blocking of the fixing element 1 in the receiving part 2 in both ways of the height direction Z of the lighting device according to the invention. In fact, the lower face 101 of the OLED diode 100, resting against the outer face 23a of the upper wall 23 of the engagement portion, limits any relative movement of the OLED diode 100 and receiving part 2 in both ways of direction Z, corresponding to the height of the lighting device according to the invention. also, the engagement of the side edges 230a, 230b of the slot 230 in the engagement grooves 3a, 3b of the fixing element 1, and the particular configuration of the head 11 of the fixing element 1 with the receiving cavity 220, achieve a blocking of the fixing element 1 relative to the receiving part 2 in both ways of direction Y, corresponding to the width of the lighting device according to the invention. finally, the stop 12 achieved by the front end 10d of the upright 10 of the fixing element 1 resting against the end edge 230c of the slot 230, and/or the stopping of the blocking wall 12a of the stop 12 against the inlet wall 25 of the receiving part 2, achieve a blocking of the fixing element 1 with the support 200 in one way of the longitudinal direction X of the lighting device according to the invention. More precisely, this longitudinal blocking is achieved in the longitudinal direction of insertion of the fixing element 1 in the receiving cavity 220.

(40) The OLED diode 100 is thus assembled with its support 200 in a simple and reproducible fashion.

(41) FIGS. 4 and 5 illustrate a variant embodiment of the invention in which the OLED diode 100 with its support 200 is blocked, in particular in the previously defined longitudinal direction X, in both ways of this longitudinal direction. To achieve this, the lighting device in this embodiment comprises a pre-assembly hook 3.

(42) With reference to FIG. 5, the pre-assembly hook 3 comprises a lug 30 arranged protruding, in the width direction Y of the lighting device according to the invention, from at least one of the side walls 24a, 24b of the engagement portion 22, here the side wall 24a. Advantageously, in the longitudinal direction X of the lighting device according to the invention, the lug 30 is arranged directly adjacent to the end edge of the slot provided in the engagement portion 22, i.e. closer to this end edge than to the inlet wall of the engagement portion 22.

(43) With reference to FIGS. 4 and 5, the pre-assembly hook 3 also comprises a flexible tab 31 and a slit 32 provided on or in the head 11 of the fixing element 1. More precisely, the flexible tab 31 and the slit 32 are arranged in at least one of the side walls of the head 11. Advantageously, the flexible tab 31 protrudes relative to the side wall of the head 11. According to the variant but not exclusive embodiment illustrated more particularly in FIGS. 4 and 5, the flexible tab 31 has generally an L-shape, the short branch 31b of which is oriented in the longitudinal direction X of the lighting device according to the invention, and the long branch 31a of which is oriented in said transverse direction Y.

(44) According to this variant embodiment, the slit 32 also has an L-shape substantially complementary to the L-shape of the flexible tab 31. More precisely, the slit 32 is formed by a cut-out in the head 11 around the branches of the L formed by the flexible tab 31.

(45) According to the invention, the dimensions and/or respective positions of the lug 30 and flexible tab 31 are defined such that, during the longitudinal sliding movement on insertion of the fixing element 1 inside the receiving cavity 220, the lug 30 forms an obstacle to the progression of the fixing element 1. In other words, during the sliding movement, the long branch 31a of the flexible tab 31 comes to stop against the lug 30.

(46) Because of the flexibility of the flexible tab 31 and the specific shape of the slit 32, the flexible tab 31 deforms under the effect of the stress applied longitudinally by the continued sliding movement of the fixing element 1 in the receiving cavity 220. The long branch 31 then escapes the lug 30 and passes this.

(47) In the continuation of the sliding movement of the fixing element 1 in the receiving cavity 220 in the direction of the end wall 26, because of the natural elasticity of the material constituting the fixing element 1 and because of the slit 32, the flexible tab 31 resumes its initial position. A rear face of the long branch 31a of the flexible tab 31 then constitutes a longitudinal stop, preventing any sliding of the fixing element 1 towards the rear, i.e. in the direction of the inlet wall 25 of the receiving cavity 220.

(48) By providing the pre-assembly hook 3 formed by the lug 30 and the flexible tab 31, the invention allows provision of an intermediate blocking of the OLED diode 100 in its support 200, i.e. prior to its final blocking.

(49) FIG. 6 shows in perspective a lighting device according to the invention as just described, and part of its assembly for connection to an electrical power supply. The figure shows the OLED diode 100 and its support 200, together with the engagement portion 22 of the receiving part 2. The figure shows that on the front end of the fixing element 1, the support 200 comprises a protruding portion 4, part of which is configured to be positioned above the upper face 112 of the OLED diode 100, thus achieving a masking of the longitudinal end of the head 11.

(50) This figure also depicts diagrammatically a connector 5 intended to ensure the electrical connection between the connecting element 130 previously described and an electrical power supply of the OLED diode 100, not shown on the figure. It is clear that the connector 5 is arranged opposite the receiving part 2 relative to the support 200. In other words, the connector 5 and the lighting device formed by the OLED diode 100 and the receiving part 2 are each arranged on one side of a wall forming the support 200.

(51) FIG. 7 illustrates diagrammatically the various components of the lighting and/or signalling system of a motor vehicle comprising at least one lighting device according to the invention. With reference to this figure, such a system comprises a housing 6 and a transparent or translucent lens 7, which together delimit a receiving volume 600 of at least one lighting device according to the invention.

(52) At least one OLED diode 100 received on a support 200 is placed in the receiving volume 600. According to the exemplary but not exclusive embodiment illustrated on FIG. 7, the support 200 comprises a plurality of receiving parts 2a, 2b, 2c, 2d, each intended to receive an OLED diode 100 (only one OLED diode 100 is shown on FIG. 7).

(53) According to the particular arrangement illustrated on FIG. 7, the OLED diodes 100 are arranged side by side on the support 200 in the transverse direction Y previously defined. According to other exemplary embodiments, not shown here, the OLED diodes 100 and the corresponding receiving parts may for example be arranged staggered on the support 200, in particular in pairs.

(54) The support 200 here forms a mask which separates the receiving volume 600 into a first sub-volume containing the OLED diodes and corresponding receiving parts, and the second sub-volume, also called the technical volume, containing the connectors such as the connector 5 illustrated on FIG. 6, via which the OLED diodes 100 are connected to an electrical power supply.

(55) FIG. 8 illustrates in a rear view the lighting and/or signalling system as just described. The term “rear view” here means a view of the support 200 observed from said technical volume. According to the invention, a monobloc piece 8 is placed against a face 201 of the support 200 oriented on the side of this technical volume, such that it blocks at least two OLED diodes 100 in their respective receiving parts, in particular in said longitudinal direction X. Advantageously, the monobloc piece 8 blocks the assembly of OLED diodes 100 of the lighting and/or signalling system in a direction opposite the direction of insertion of the OLED diodes 100 in the receiving part concerned.

(56) As FIG. 8 shows more precisely, the monobloc piece 8 is common to a plurality of lighting devices according to the invention.

(57) The common piece 8, advantageously fixed on the support 200 for example via at least one screw (not shown on FIG. 8), allows complete fixing of the assembly of OLED diodes 100 in their receiving parts in a single step of fixing the monobloc piece 8.

(58) The lighting devices according to the invention are electrically connected to a printed circuit board 35 via a common connection element 500, to which some or all of the connecting elements 130 previously described may be connected. The electrical connection of the printed circuit board 35 is then achieved by means of an assembly 9 for connection to an electrical power supply outside the lighting system.

(59) The invention thus achieves a lighting device and a lighting and/or signalling system for a motor vehicle which uses at least one OLED-type diode, a lighting system and device in which the OLED diode or diodes are fixed in a simple and reproducible fashion on a support 200 or mask, which is simple and cheap to produce.

(60) The invention described above is applied particularly advantageously but not exclusively to the lighting and/or signalling lamps situated at the rear of motor vehicles.

(61) The invention described above is not however reduced to the means and configurations described and illustrated, and may also apply to all equivalent means or configurations and to any combination of such means. In particular, the forms described and illustrated here, in particular the form of the emitter part of the OLED diode, the substantially parallelepipedic forms of the elements of the fixing element 1 of the OLED diode 100 and of the receiving part 2, are not exclusive and any other shape may be considered insofar as it fulfils the functionalities described in the present document.

(62) Furthermore, although the invention has been illustrated considering the particular example of an OLED source as a surface light source, it is evident that the invention applies to any type of surface light source as defined in the present text.