JP2018199388A - Illumination device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device for a vehicle capable of realizing a lighting mode having excellent design. SOLUTION: A lighting device 20 is composed of a plate-shaped member having light transmission, and has a planar light emitter 30 having a light emitting portion 31 that emits light toward a vehicle chamber on one plate surface 30A. Arranged so as to cover one plate surface 30A of the light emitting body 30, a part L1 of the light emitted from the light emitting unit 31 is transmitted, and the other part L2 of the light emitted from the light emitting unit 31 is transmitted. The reflecting half mirror 40 and the other part L2 of the light transmitted by the half mirror 40 and transmitted through the planar illuminant 30 are arranged so as to cover the other plate surface 30B of the planar illuminant 30. A reflecting member 50 having a reflecting surface 50A that reflects light is provided, and the reflecting surface 50A has a concavo-convex portion 53 composed of a convex portion 53A and a concave portion 53B, and light is emitted according to the distance between the half mirror 40 and the concavo-convex portion 53. It is configured so that the occupant can visually recognize the imaginary image V1 having a shape in which the real image R of the emitting unit 31 is partially distorted. [Selection diagram] Fig. 3

Description

  The present invention relates to a vehicle lighting device.

  Conventionally, the thing of the following patent document 1 is known as a vehicle lamp. The vehicular lamp disclosed in Patent Document 1 includes a planar light emitter having an organic EL light emitting unit on a part of a substrate, and repeatedly reflects light emitted from the organic EL light emitting unit, and partially transmits light to the front of the vehicle. A reflecting member and a half mirror are provided so as to face each other so as to transmit light. And it is described that according to such a structure, the appearance with a feeling of depth can be implement | achieved by the repetitive reflection using a half mirror.

JP2015-65150A

  By the way, in recent years, there is an increasing need for improving the design of a vehicle interior, and a lighting design for a vehicle lighting device that is excellent in design is also required.

  However, in the configuration disclosed in Patent Document 1, the real image of the light emitting unit and the smaller virtual image having the same shape as the real image of the light emitting unit are configured to create a sense of depth by being viewed independently of each other. It must be a monotonous lighting mode.

  This invention is completed based on the above situations, Comprising: It aims at providing the illuminating device for vehicles which can implement | achieve the illumination aspect excellent in the designability.

  In order to solve the above-described problems, a vehicle lighting device according to the present invention includes a planar light emitting device that includes a light-transmitting plate-like member and has a light emitting portion that emits light toward the vehicle interior on one plate surface. And other one of the light emitted from the light emitting part and transmitting a part of the light emitted from the light emitting part. The half mirror configured to reflect a part of the light and the light that is arranged so as to cover the other plate surface of the planar light emitter, reflected by the half mirror, and transmitted through the planar light emitter A reflective member having a reflective surface configured to reflect the other part of the mirror, wherein the reflective surface includes a convex portion protruding in a direction approaching the half mirror and a concave portion recessed in a direction away from the half mirror. A distance between the half mirror and the uneven portion. Depending on, and a virtual image in the shape as distorted part a real image of the light emitting portion is configured to visually recognize the occupant.

  According to the present invention, it is possible to irradiate the irradiation light toward the vehicle interior in such a manner that the real image of the light emitting portion and the virtual image having a shape distorted by the real image are fused. As a result, it is possible to provide a vehicle lighting device that exhibits a novel design by light from one planar light emitter.

  In the above configuration, the planar light emitter further includes a non-light emitting portion that does not emit light toward the vehicle compartment on the one plate surface, and a boundary between the light emitting portion and the non-light emitting portion is: The reflective surface is arranged so as to extend along one direction, and at the position overlapping the boundary, the reflective surface forms a ridge extending along the direction in which the convex portion intersects the one direction, The concave portion may form a concave line extending along a direction intersecting with the one direction.

  According to such a configuration, it is possible to generate a virtual image that is distorted so that the real image of the light emitting portion undulates in accordance with the shape of the convex portion and the concave portion at the boundary with the dark portion corresponding to the non-light emitting portion. As a result, it is possible to provide a vehicle lighting device that exhibits a novel design with a pronounced virtual image distortion.

  ADVANTAGE OF THE INVENTION According to this invention, the illuminating device for vehicles which can implement | achieve the illumination aspect excellent in the designability can be provided.

The perspective view which looked at the illuminating device which concerns on Embodiment 1 of this invention from the vehicle interior. Disassembled perspective view of lighting device Explanatory drawing explaining the effect | action of an illuminating device Schematic diagram schematically representing the real and virtual images of the light exit and their fused images The exploded perspective view of the illuminating device concerning Embodiment 2 of this invention. Explanatory drawing explaining the effect | action of an illuminating device Schematic diagram schematically representing the real and virtual images of the light exit and their fused images

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a lighting device (vehicle lighting device) 20 provided on the ceiling portion 11 of the vehicle 10 shown in FIG. In the X-axis, Y-axis, and Z-axis shown in a part of each drawing, the X-axis direction indicates the vehicle width direction, the Y-axis direction indicates the vehicle longitudinal direction, and the Z-axis direction indicates the vehicle vertical direction (vehicle It is drawn to show the indoor and outdoor directions).

  As shown in FIG. 2, the illuminating device 20 includes a light source 21, a planar light emitting body 30 that emits light from the light source 21, a half mirror 40, a reflecting member 50, a lower housing 23 that houses these, And an upper housing 24. As for the illuminating device 20, the reflective member 50, the planar light-emitting body 30, and the half mirror 40 are accommodated in the lower housing | casing 23 in this order. In FIGS. 2 and 3, for convenience of explanation, the reflecting member 50, the planar light emitter 30, and the half mirror 40 are drawn apart from each other, but these members are in contact with or close to each other. Are arranged to be stacked. The illuminating device 20 is attached to the ceiling portion 11 in such a posture that the lower housing 23 is located outside the passenger compartment and the upper housing 24 is located inside the passenger compartment (see FIG. 1). And the illuminating device 20 becomes a structure which irradiates light toward the vehicle interior from the opening part 24A formed in the upper housing | casing 24 at the time of lighting.

  As shown in FIG. 2, the planar light emitter 30 is composed of a plate-like member having optical transparency. Specifically, the planar light emitter 30 has a rectangular plate shape in plan view, and is formed of a synthetic resin material (for example, acrylic resin such as PMMA or polycarbonate) having a refractive index sufficiently higher than air and substantially transparent. Has been. The planar light emitter 30 is accommodated in the lower housing 23 in a posture in which one plate surface 30A faces the vehicle interior side. And the planar light-emitting body 30 has the structure which introduce | transduces the light from the light source 21 into the inside from the side surface 30C facing the light source 21, and makes it propagate from one board surface 30A, propagating inside.

  As shown in FIGS. 2 and 3, the planar light emitting body 30 includes a light emitting portion 31 that emits light toward the vehicle interior and a non-light that does not emit light toward the vehicle interior. And an emission part 32. For example, the light emitting unit 31 is configured to emit light propagating through the inside of the planar light emitter 30 to the outside by applying a fine lens processing to one plate surface 30A. In FIG. 2, the light emitting portion 31 is shown in a shaded range. On the other hand, the non-light emitting portion 32 is configured to be a flat surface, so that the light propagating inside the planar light emitter 30 is totally reflected and is not emitted outward. The non-light emitting unit 32 may be configured to have a sufficiently small amount of light emitted to the outside as compared with the light emitting unit 31, and includes a configuration in which a small amount of light is emitted from the non-light emitting unit 32 to the outside. . The light emitting part 31 and the non-light emitting part 32 are configured to transmit light incident at an angle close to the perpendicular to the one plate surface 30A.

  As shown in FIG. 2, the planar light emitter 30 is provided with a boundary 33 between the light emitting portion 31 and the non-light emitting portion 32 so as to extend along one direction. In the present embodiment, a plurality of strip-shaped light emitting portions 31 and a plurality of strip-shaped non-light emitting portions 32 are alternately arranged in parallel in the Y-axis direction, and a boundary 33 between the light emitting portions 31 and the non-light emitting portions 32 is X It extends linearly along the axial direction. In other words, the light emitting part 31 is configured to allow the occupant to visually recognize the striped real image R extending along the X-axis direction.

  As shown in FIGS. 2 and 3, the half mirror 40 has a plate shape or a film shape, and has a flat half mirror side reflection surface 40 </ b> A. The half mirror-side reflecting surface 40A only needs to have a function as a semi-transmitting and semi-reflecting surface, the light transmittance in the visible light region is 30% or more and 70% or less, and the light reflectance in the visible light region. It is preferable to use those having a ratio of 30% to 70%.

  As shown in FIG. 3, the half mirror 40 is disposed so as to cover one plate surface 30 </ b> A of the planar light emitter 30. Specifically, the half mirror 40 is disposed such that the half mirror side reflection surface 40A faces one plate surface 30A of the planar light emitter 30 and is parallel to the plate surface 30A. The half mirror 40 is configured to transmit a part L1 of the light emitted from the light emitting part 31 and reflect another part L2 of the light emitted from the light emitting part 31. The half mirror 40 is also configured to transmit part of the light reflected by the reflecting member 50 and transmitted through the planar light emitter 30 and to reflect the other part. That is, the half mirror 40 is configured to transmit a part of the light repeatedly reflected from the reflecting member 50 and reflect a part thereof.

  As shown in FIGS. 2 and 3, the reflection member 50 includes a plate-like base material and a reflection layer that is formed on one plate surface of the base material and forms the reflection surface 50 </ b> A. The reflection layer is made of, for example, a metal film such as aluminum deposited on the surface of the substrate, and most of the incident light can be mirror-reflected by the reflection surface 50A.

  As shown in FIG. 3, the reflecting member 50 is disposed so as to cover the other plate surface 30 </ b> B of the planar light emitter 30. The reflection surface 50A is configured to reflect the other part L2 of the light reflected by the half mirror 40 and transmitted through the planar light emitter 30. The reflecting surface 50A is not only such light L2, but also light in the vehicle interior that passes through the half mirror 40 and the planar light emitter 30 and enters the lighting device 20 when the lighting device 20 is not lit. Can also be reflected.

  As shown in FIGS. 2 and 3, the reflection surface 50 </ b> A has a concavo-convex portion 53 including a convex portion 53 </ b> A protruding in a direction approaching the half mirror 40 and a concave portion 53 </ b> B recessed in a direction away from the half mirror 40. The “convex portion” is a shape that protrudes with respect to a reference surface parallel to the extending direction of the half mirror 40, and the “recess portion” is a shape that is recessed with respect to the reference surface. In the present embodiment, the reference surface is located between the top surface of the convex portion 53A and the bottom surface of the concave portion 53B. The concavo-convex portion 53 constitutes a relief provided on the reflective surface 50A, and the concavo-convex shape, pitch, overall design, and the like can be set as appropriate.

  As shown in FIGS. 3 and 4, the reflecting surface 50 </ b> A has a virtual image having a shape distorted as a part of the real image R of the light emitting portion 31 according to the distance between the half mirror 40 and the uneven portion 53. It is comprised so that it may visually recognize. In the present embodiment, the light reflected near the step of the uneven portion 53 is visually recognized by the occupant as a step-shaped distortion in the virtual image V1 (see FIG. 4). A plurality of such virtual images are formed according to the number of times of reflection by the half mirror 40. When the virtual image generated after being reflected once by the half mirror 40 is a virtual image V1 and the virtual image generated after being reflected twice (n times) is V2 (Vn), the virtual image Vn is reflected by the half mirror 40. As n increases, the image becomes darker due to light attenuation. In the present embodiment, the virtual image V1 and the virtual image Vn are formed so as to be substantially overlapped. In the following description, the virtual image V1 will be described as an example of the virtual image. Such a virtual image can be formed so that the virtual image V1 and the virtual image Vn do not overlap each other by appropriately setting the shape and angle of the reflecting surface 50A and / or the half mirror side reflecting surface 40A. is there.

  As shown in FIG. 2, the reflecting surface 50 </ b> A has a protruding line extending along the direction in which the protruding portion 53 </ b> A intersects with one direction at a position overlapping the boundary 33 between the light emitting portion 31 and the non-light emitting portion 32. The recess 53B forms a recess extending along the direction intersecting with the one direction. Specifically, on the reflective surface 50A, convex portions 53A extending along the Y-axis direction and a plurality of concave portions 53B extending along the Y-axis direction are alternately arranged in parallel in the X-axis direction.

  Then, the effect | action and effect of this embodiment are demonstrated. When the lighting device 20 is not lit, no light is emitted from the light source 21, and no light is emitted from the light emitting portion 31 of the planar light emitter 30. When the external illuminance is high, such as in the daytime, external light enters the lighting device 20, is reflected by the reflecting surface 50 </ b> A of the reflecting member 50, and is emitted toward the vehicle interior side. Then, the occupant can visually recognize the relief formed by the concavo-convex portion 53 behind the half mirror 40. That is, the lighting device 20 has an effect of decorating the interior of the vehicle by visually recognizing the uneven portion 53 even when the lighting device is not lit.

  The lighting device 20 is set to light up when the door of the vehicle 10 is opened or when a switch (not shown) is turned on. As shown in FIG. 3, when the lighting device 20 is turned on, the light from the light source 21 is emitted from the light emitting unit 31 toward the vehicle interior side. A part L1 of the light emitted from the light emitting part 31 passes through the half mirror 40 and is emitted toward the vehicle interior. The light L1 transmitted through the half mirror 40 is visually recognized by the passenger as a striped real image R in which the light emitting portion 31 is a bright portion and the non-light emitting portion 32 is a dark portion (see FIG. 4A). . That is, the light L <b> 1 is emitted toward the vehicle interior side while generating the real image R of the light emitting unit 31.

  The other part L2 of the light emitted from the light emitting part 31 is reflected by the half mirror 40 toward the outside of the passenger compartment. The reflected light L2 passes through the planar light emitter 30 and enters the reflecting surface 50A of the reflecting member 50. Here, the light L2 incident on the top surface of the convex portion 53A is reflected by the surface, and when a part of the light L2 is emitted toward the interior of the vehicle interior, the half mirror 40 projects from the top surface of the convex portion 53A. It is visually recognized as a virtual image V1 at a position separated by a distance of. On the other hand, the light L2 incident on the bottom surface of the recess 53B is reflected by the surface, and when part of the light L2 is emitted toward the vehicle interior side, it is separated from the bottom surface of the recess 53B by a distance from the half mirror 40. It is visually recognized as a virtual image V1 at a position. As a result, the light L2 is visually recognized as a virtual image V1 having a wavy shape in which the stripe-shaped real image R generated by the light L1 is distorted following the shape of the uneven portion 53 (see FIG. 4B). That is, the light L2 is emitted toward the passenger compartment while generating a virtual image V1 having a shape that distorts the real image R of the light emitting unit 31 to the occupant.

  Among the part L1 of the light from the light emitting part 31 and the other part L2 of the light from the light emitting part 31, the light reflected by the reflecting surface 50A of the reflecting member 50 is superimposed on each other, Irradiated toward the passenger compartment. That is, the lights L1 and L2 that form the real image R and the virtual image V1 are emitted from the same position in the same direction. Therefore, the occupant who viewed the illumination device 20 recognizes the real image R and the virtual image V1 as a single image (see FIG. 4C).

  As described above, according to the present embodiment, the irradiation light is emitted toward the vehicle interior in such a manner that the real image R of the light emitting unit 31 and the virtual image V1 having a shape that distorts the real image R are fused. Can do. As a result, the illuminating device 20 which exhibits a novel design can be provided with the light from the one planar light-emitting body 30. FIG.

  Further, according to the present embodiment, the real image R of the light emitting portion 31 is distorted so as to wave in accordance with the shape of the convex portion 53A and the concave portion 53B at the boundary with the dark portion corresponding to the non-light emitting portion 32. Can be generated. As a result, it is possible to provide the lighting device 20 that exhibits a novel design in which the distortion of the virtual image V1 is conspicuous.

<Embodiment 2>
Next, Embodiment 2 of the present invention will be described with reference to FIGS. In the present embodiment, a lighting device (vehicle lighting device) 120 having a light emitting portion 131 and a reflecting surface 150A having shapes different from those of the light emitting portion 31 and the reflecting surface 50A of the first embodiment will be exemplified. In addition, the overlapping description about the same structure, an effect | action, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.

  As shown in FIG. 5, the light emitting portion 131 is formed over the entire surface of one plate surface 30 </ b> A of the planar light emitter 130. In FIG. 5, the light emitting portion 131 is shown in a shaded range. In other words, in the present embodiment, the non-light emitting portion 32 is not formed on one plate surface 30A of the planar light emitter 130. The light emitting unit 131 is configured to emit light from the light source 21 with substantially uniform luminance.

  As shown in FIGS. 5 and 6, the reflective surface 150 </ b> A has a raised shape in which the convex portion 153 </ b> A intersects with a plurality of ridge lines, and the concave portion 153 </ b> B has a concave shape in which a plurality of valley lines intersect. In the present embodiment, the concavo-convex portion 153 is configured as a geometric pattern. However, the concavo-convex portion 153 has a convex portion and a concave portion that are appropriately deformed, and is arranged at random, so that it looks like a natural object. May have a special design.

  As shown in FIG. 6, in the illuminating device 120, the light L1 transmitted through the half mirror 40 is visually recognized as a solid real image R by the occupant with the light emitting portion 131 being a bright portion (FIG. 7A). reference). That is, the light L1 is emitted toward the vehicle interior while generating a real image R of the light emitting unit 131. According to such irradiation light, the irradiation surface can be illuminated uniformly.

  The other part L2 of the light emitted from the light emitting part 131 is reflected by the half mirror 40 toward the outside of the passenger compartment. The light L2 is visually recognized as a three-dimensional virtual image V1 in which the solid real image R generated by the light L1 is distorted following the shape of the uneven portion 153 (see FIG. 7B). That is, the light L2 is emitted toward the passenger compartment while generating a virtual image V1 having a shape that distorts the real image R of the light emitting unit 131 to the occupant.

  Among the part L1 of the light from the light emitting part 131 and the other part L2 of the light from the light emitting part 131, the light reflected by the reflecting surface 150A of the reflecting member 150 is superimposed on each other, Irradiated toward the passenger compartment. That is, the lights L1 and L2 that form the real image R and the virtual image V1 are emitted from the same position in the same direction. Therefore, the occupant who viewed the illumination device 120 recognizes the real image R and the virtual image V1 as one image (see FIG. 7C).

  As described above, according to the present embodiment, the irradiation light is emitted toward the vehicle interior in such a manner that the real image R of the light emitting unit 131 and the virtual image V1 having a shape that distorts the real image R are fused. Can do. As a result, it is possible to provide the lighting device 120 that exhibits a novel design by the light from the planar light-emitting body 130.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiment, the planar light emitter is exemplified by a light guide member that emits light from a side light type point light source. However, the present invention is not limited to this. For example, the planar light emitter may be configured to emit light by an organic EL display having light transparency. The light source is not limited to a point light source, and may emit light in a planar shape via a light guide rod or the like.
(2) Besides the above embodiment, the shape of the light emitting part can be changed as appropriate. For example, the light emitting portion may have a stripe shape extending in a V shape, and a stripe-like portion as in the first embodiment and a solid portion as in the second embodiment. It may be configured to include. Furthermore, the arrangement of the light emitting part and the non-light emitting part is not limited to that disclosed in the first embodiment, and the light emitting part constitutes a trademark, a logo mark, various designs, and the like. A part of the boundary may be arranged so as to extend along one direction.
(3) Besides the above embodiment, the configuration of the half mirror can be changed as appropriate. For example, the half mirror is not limited to the one having a flat reflection surface on the half mirror side, and may have a concave or convex curved surface.
(4) Besides the above embodiment, the configuration of the reflecting member can be changed as appropriate. For example, the reflecting member may be formed of a concave and convex portion having a curved surface on the concave and convex portion, or may be configured such that a trademark, a logo mark, various designs and the like are embossed.
(5) Besides the above implementation, the shape and installation location of the lighting device can be set as appropriate. For example, the lighting device may be installed in a door trim of a vehicle door, or may be installed in front of the vehicle on the ceiling and used as a map lamp. In addition, it is preferable that the lighting device appropriately design the irradiation range, illuminance, directivity, and the like of the light emitted from the light emitting unit according to the installation location.
(6) In addition to the above implementation, the lighting device may be mounted on a vehicle such as a ship or an aircraft other than the vehicle.

  DESCRIPTION OF SYMBOLS 20,120 ... Lighting device (vehicle lighting device), 30, 130 ... Planar light emitter, 30A ... One plate surface, 30B ... The other plate surface, 31, 131 ... Light emission part, 32 ... Non-light emission part , 33 ... boundary, 40 ... half mirror, 50, 150 ... reflecting member, 50A, 150A ... reflecting surface, 53, 153 ... uneven part, 53A, 153A ... convex part, 53B, 153B ... concave part, L1 ... part of light , L2 ... other part of light, R ... real image, V1, V2 ... virtual image

Claims (2)

A planar light-emitting body comprising a light-transmitting plate-like member, and having a light emitting portion for emitting light toward the vehicle compartment on one plate surface;
It is arranged so as to cover the one plate surface of the planar light-emitting body, and transmits a part of the light emitted from the light emitting part and another part of the light emitted from the light emitting part. A half mirror configured to reflect,
A reflection that is arranged so as to cover the other plate surface of the planar light emitter, is reflected by the half mirror, and reflects another part of the light transmitted through the planar light emitter. A reflective member having a surface,
The reflective surface has a concavo-convex portion including a convex portion protruding in a direction approaching the half mirror and a concave portion recessed in a direction away from the half mirror, and the light emission is performed according to a distance between the half mirror and the concavo-convex portion. An illuminating device for a vehicle, characterized in that the occupant visually recognizes a virtual image having a shape obtained by partially distorting a real image of a part. The planar light emitter further includes a non-light emitting portion that does not emit light toward the vehicle compartment on the one plate surface, and a boundary between the light emitting portion and the non-light emitting portion is in one direction. It is arranged to extend along,
The reflective surface forms a ridge extending along a direction where the convex portion intersects with the one direction at a position overlapping with the boundary, and extends along a direction where the concave portion intersects with the one direction. The vehicle lighting device according to claim 1, wherein the vehicle lighting device is a concave line.

Images