WO2020189185A1

WO2020189185A1 - Vehicular lamp

Info

Publication number: WO2020189185A1
Application number: PCT/JP2020/007373
Authority: WO
Inventors: 雄哉金子; 真司佐藤; 徹伊東; 靖佐藤
Original assignee: 株式会社小糸製作所
Priority date: 2019-03-19
Filing date: 2020-02-25
Publication date: 2020-09-24
Also published as: CN113574314A; JPWO2020189185A1; CN113574314B

Abstract

This vehicular lamp (1) is provided with: a first light-emitting part (8a) and a second light-emitting part (8b) that each have a planar light source (14) and emit light in a first direction; and an outer cover (4) that is translucent and that constitutes an outer casing of the vehicular lamp (1). The first light-emitting part (8a) and the second light-emitting part (8b) are aligned so that at least a portion of a light-emitting surface (18) of the first light-emitting part (8a) opposes a rear surface (24) on the opposite side from the light-emitting surface (18) of the second light-emitting part (8b), and the rear surface (24) constitutes a reflecting surface that reflects the light of the first light-emitting part (8a) in a second direction that crosses the first direction. The outer cover (4) allows the emission of light in the first direction and the second direction.

Description

Vehicle lighting

The present invention relates to a vehicle lamp, and particularly to a vehicle lamp used for a vehicle such as an automobile.

Conventionally, vehicles are equipped with various vehicle lighting fixtures such as headlamps, tail lamps, stop lamps, and side marker lamps. When a vehicle is equipped with a plurality of lighting fixtures, the installation space for the entire lighting fixtures naturally increases. On the other hand, Patent Document 1 discloses a vehicle lighting fixture in which a side marker lamp unit having a planar light source with a light emitting surface facing the vehicle side is housed in a lighting chamber together with a tail lamp unit and a stop lamp unit. There is. In Patent Document 1, one vehicle lamp has a plurality of lamp functions.

Japanese Unexamined Patent Publication No. 2016-051653

Implementing multiple lighting functions in one vehicle lighting will lead to an increase in the size of the vehicle lighting. In particular, the size of the vehicle lighting equipment that can be visually recognized, in other words, the ratio of the area of the vehicle lighting equipment to the vehicle body surface can be increased. On the other hand, in order to increase the degree of freedom in vehicle design and to increase the space that can be used for purposes other than the installation of lighting equipment, it may be required to reduce the size of lighting equipment for vehicles.

The present invention has been made in view of such a situation, and an object of the present invention is to provide a technique for miniaturizing a vehicle lamp having a plurality of lamp functions.

In order to solve the above problems, one aspect of the present invention is a vehicle lamp. Each of the vehicle lighting fixtures has a planar light source and has a first light emitting portion and a second light emitting portion that emit light in the first direction, and has translucency, and constitutes an outer housing of the vehicle lighting fixture. It is equipped with an outer cover. The first light emitting unit and the second light emitting unit are arranged so that at least a part of the light emitting surface of the first light emitting unit faces the back surface of the second light emitting unit opposite to the light emitting surface, and the back surface is the first light emitting unit. The outer cover constitutes a reflective surface that reflects the light of the portion in the second direction intersecting the first direction, and the outer cover allows the light to be emitted in the first direction and the second direction. According to this aspect, it is possible to reduce the size of the vehicle lighting equipment.

In the above aspect, the planar light source may be an organic EL element. Further, in any of the above aspects, the first direction may be the front of the lamp and the second direction may be the side of the lamp. Further, in any of the above embodiments, the second light emitting portion may have a support plate that supports the planar light source, and the surface of the support plate facing the first light emitting portion side may form a reflective surface. Further, in any of the above aspects, a part of the light emitting surface of the first light emitting unit may be located outside the second light emitting unit when viewed from the first direction. Further, in any of the above embodiments, the light emitting surface of the first light emitting unit and the light emitting surface of the second light emitting unit have a pointed head that gradually narrows from one end side to the other end side, and the first light emitting unit. At least a part of the apex of the head may be located outside the second light emitting portion when viewed from the first direction. Further, in any of the above embodiments, the outer cover may have a shape that gradually narrows toward the front of the lamp. Further, in any one of the above embodiments, the vehicle lamp is composed of at least a first light emitting unit and a second light emitting unit, and drives a plurality of light emitting units having different sizes of the planar light sources and a plurality of light emitting units. The lighting circuit may supply a plurality of light emitting units with a current determined according to the size of the planar light source in the light emitting unit having the smallest planar light source among the plurality of light emitting units. Further, in any one of the above embodiments, the vehicle lighting fixture includes a first lighting circuit for driving the first light source and a second lighting circuit for driving the second light source, and the first lighting circuit is the first. The first light emitting unit may be driven so that the brightness of the planar light source of the first light emitting unit is higher than the brightness of the planar light source of the second light emitting unit.

It should be noted that any combination of the above components and the conversion of the expression of the present invention between methods, devices, systems, etc. are also effective as aspects of the present invention.

According to the present invention, it is possible to reduce the size of a vehicle lamp having a plurality of lamp functions.

It is a perspective view of the lighting equipment for a vehicle which concerns on Embodiment 1. FIG. It is a front view of the lighting equipment for a vehicle. It is sectional drawing which follows the AA line of FIG. It is sectional drawing along the line BB of FIG. It is sectional drawing of the lighting equipment for a vehicle which concerns on Embodiment 2. FIG.

Hereinafter, the present invention will be described based on a preferred embodiment with reference to the drawings. The embodiments are not limited to the invention, but are exemplary, and all the features and combinations thereof described in the embodiments are not necessarily essential to the invention. The same or equivalent components, members, and processes shown in the drawings shall be designated by the same reference numerals, and redundant description will be omitted as appropriate. In addition, the scale and shape of each part shown in each figure are set for convenience in order to facilitate explanation, and are not limitedly interpreted unless otherwise specified. In addition, when terms such as "first" and "second" are used in the present specification or claims, these terms do not represent any order or importance unless otherwise specified, and have a certain structure. It is for distinguishing between and other configurations. In addition, some of the members that are not important for explaining the embodiment in each drawing are omitted and displayed.

(Embodiment 1)
FIG. 1 is a perspective view of a vehicle lamp according to the first embodiment. FIG. 2 is a front view of a vehicle lighting fixture. FIG. 3 is a cross-sectional view taken along the line AA of FIG. FIG. 4 is a cross-sectional view taken along the line BB of FIG. The vehicle lamp 1 of the present embodiment is, for example, a rear combination lamp arranged at the rear of the vehicle.

The vehicle lamp 1 includes a lamp body 2 having an opening in front of the lamp body and a translucent outer cover 4 that covers the opening of the lamp body 2. The lamp body 2 is also called a housing, and the outer cover 4 is also called an outer lens. The outer cover 4 has translucency, and together with the lamp body 2, constitutes an outer housing of the vehicle lighting equipment 1. A plurality of light emitting units 8, an extension member 10, and a lighting circuit 12 are housed in a lamp chamber 6 formed by the lamp body 2 and the outer cover 4.

The plurality of light emitting units 8 are composed of at least a first light emitting unit 8a and a second light emitting unit 8b. The vehicle lighting tool 1 of the present embodiment has a first light emitting unit 8a, a second light emitting unit 8b, and a third light emitting unit 8c as a plurality of light emitting units 8. Hereinafter, when the first light emitting unit 8a to the third light emitting unit 8c are not distinguished as appropriate, these are collectively referred to as a light emitting unit 8. Each light emitting unit 8 has a planar light source 14 and a support plate 16 that supports the planar light source 14.

The planar light source 14 of the present embodiment is an organic EL element. The organic EL element constituting the planar light source 14 has a known structure. Specifically, the organic EL element has a plate-shaped substrate, an anode, an organic EL light emitting layer and a cathode laminated on the substrate, and a sealing plate for sealing the organic EL light emitting layer from the outside. .. The substrate is made of, for example, transparent thin film glass. The organic EL light emitting layer is formed by laminating a hole injection layer, a hole transport layer, an organic light emitting layer, and an electron transport layer from the anode side. A transparent electrode mainly composed of indium tin oxide (ITO) or the like is used for the anode, and a metal electrode mainly composed of aluminum is used for the cathode. As the cathode, a transparent electrode made of ITO or the like may be used.

The anode is a thin-film electrode layer, which is arranged between the substrate and the organic EL light emitting layer, and one end thereof extends to one end side of the organic EL element. The cathode is a thin-film electrode layer, which is disposed between the organic EL light emitting layer and the sealing plate, and one end thereof extends to the other end side of the organic EL element. The anode, the organic EL light emitting layer, and the cathode are sequentially laminated by, for example, thin film deposition. External power supply terminals are connected to the anode and cathode. The sealing plate is a flexible substrate made of thin film glass, and its peripheral edge is fixed to the substrate via an adhesive. In the present embodiment, an adhesive having translucency is used. The organic EL light emitting layer is sealed from the outside by a sealing member composed of a sealing plate and an adhesive. The space inside the sealing member is filled with an inert gas.

When a voltage is applied to the organic EL element, holes are injected from the anode and electrons are injected from the cathode. These are bonded by the organic light emitting layer, and the organic compound such as a fluorescent organic compound is excited by the energy generated at that time, and the organic EL light emitting layer emits light. The light emitted at this time is emitted to the front side through the transparent anode and the substrate. That is, the surface of the organic EL element on the substrate side is the main light emitting surface. Further, the light emitting surface of the planar light source 14 constitutes the light emitting surface 18 of the light emitting unit 8.

Although the substrate is made of thin film glass in the present embodiment, a flexible material such as a thin film resin film may be used. Further, the planar light source 14 may be a light source that emits light in a planar manner other than the organic EL element.

The support plate 16 is made of metal or resin. The support plate 16 has a pair of main surfaces facing each other, and a planar light source 14 is mounted on one main surface. For example, the planar light source 14 is fixed to the main surface of the support plate 16 with an adhesive tape. One end of the support plate 16 is fixed to the extension member 10.

The extension member 10 includes a back plate 20 and a pedestal 22. The back plate 20 is a plate that is arranged on the rear side of the lamp with respect to the plurality of light emitting units 8 and covers the opening of the lamp body 2. The main surfaces of the back plate 20 facing each other face the front-rear direction of the lamp. The pedestal 22 projects forward from the main surface of the back plate 20 facing the front side of the lamp. One end of each support plate 16 is fixed to the pedestal 22. Therefore, the plurality of light emitting units 8 are supported by the pedestal 22. The back plate 20 and the pedestal 22 are, for example, integrally molded products of resin. The extension member 10 is fixed to the lamp body 2 via a support mechanism (not shown).

The posture of the plurality of light emitting units 8 is determined so as to emit light in the first direction. That is, each light emitting unit 8 is arranged so that the light emitting surface 18 faces the first direction. In the present embodiment, the first direction is the front of the lamp. Further, since the vehicle lamp 1 of the present embodiment is a rear combination lamp, the front of the lamp is the rear of the vehicle. Further, the plurality of light emitting units 8 are arranged at predetermined intervals in the front-rear direction of the lamp. In the present embodiment, the first light emitting unit 8a, the second light emitting unit 8b, and the third light emitting unit 8c are arranged in this order from the rear of the lamp to the front of the lamp.

Further, in the first light emitting unit 8a and the second light emitting unit 8b, at least a part of the light emitting surface 18 of the first light emitting unit 8a faces the back surface 24 of the second light emitting unit 8b opposite to the light emitting surface 18. Be arranged. The first light emitting unit 8a and the second light emitting unit 8b of the present embodiment are arranged so that the centers of the respective light emitting surfaces 18 in the left and right directions of the lamp overlap with each other when viewed from the front of the lamp.

The second light emitting unit 8b extends on the front side of the lamp of the light emitting surface 18 of the first light emitting unit 8a. Therefore, at least a part of the light emitted from the light emitting surface 18 of the first light emitting unit 8a is irradiated to the back surface 24 of the second light emitting unit 8b. The back surface 24 of the second light emitting unit 8b constitutes a reflecting surface that reflects the light of the first light emitting unit 8a toward the second direction intersecting the first direction. In the present embodiment, the second direction is the side of the lamp. Further, the side of the lamp is the side of the vehicle. The reflecting surface reflects at least a part of the light of the first light emitting unit 8a irradiated on the reflecting surface toward an angle range of 90 ° or more with respect to the first direction.

Further, in the present embodiment, the second light emitting unit 8b and the third light emitting unit 8c are also arranged in the same positional relationship as the first light emitting unit 8a and the second light emitting unit 8b. That is, at least a part of the light emitting surface 18 of the second light emitting unit 8b is arranged so as to face the back surface 24 of the third light emitting unit 8c. The second light emitting unit 8b and the third light emitting unit 8c of the present embodiment are arranged so that the centers of the respective light emitting surfaces 18 in the left and right directions of the lamp overlap with each other when viewed from the front of the lamp. At least a part of the light emitted from the light emitting surface 18 of the second light emitting unit 8b is applied to the back surface 24 of the third light emitting unit 8c. The back surface 24 of the third light emitting unit 8c constitutes a reflecting surface that reflects the light of the second light emitting unit 8b toward the second direction intersecting the first direction.

The back surface 24 of the second light emitting unit 8b is the main surface of the support plate 16 of the second light emitting unit 8b facing the first light emitting unit 8a side. Therefore, the reflective surface that reflects the light of the first light emitting unit 8a is formed by the surface of the support plate 16 that faces the first light emitting unit 8a side. Similarly, the back surface 24 of the third light emitting unit 8c is the main surface of the support plate 16 of the third light emitting unit 8c facing the second light emitting unit 8b side. Therefore, the reflective surface that reflects the light of the second light emitting unit 8b is formed by the surface of the support plate 16 that faces the second light emitting unit 8b side.

When the support plate 16 is made of resin, the back surface 24 can be made a reflective surface by subjecting the front surface of the support plate 16 to a mirror surface such as aluminum vapor deposition. Further, when the support plate 16 is made of metal, the back surface 24 can be made a reflective surface by performing a treatment such as mirror polishing. An optical element such as a step may be provided on the back surface 24 so as to more reliably reflect light in the second direction.

Further, a part of the light emitting surface 18 of the first light emitting unit 8a is located outside the second light emitting unit 8b when viewed from the first direction. Similarly, a part of the light emitting surface 18 of the second light emitting unit 8b is located outside the third light emitting unit 8c when viewed from the first direction. In each light emitting unit 8 of the present embodiment, the outer shape of the light emitting unit 8 seen from the front of the lamp and the outer shape of the planar light source 14 have similar shapes. The outer shape of the light emitting unit 8 is also the outer shape of the support plate 16. Further, the first light emitting unit 8a to the third light emitting unit 8c have similar shapes to each other, the first light emitting unit 8a is the largest, the second light emitting unit 8b is an intermediate size, and the third light emitting unit 8c is the largest. small. Therefore, the plurality of light emitting units 8 gradually become smaller from the rear side of the lamp toward the front side of the lamp.

Therefore, when viewed from the front of the lamp, the light emitting surface 18 of the first light emitting unit 8a borders the second light emitting unit 8b, and the light emitting surface 18 of the second light emitting unit 8b borders the third light emitting unit 8c. Therefore, all the light emitting surfaces 18 of the first light emitting unit 8a to the third light emitting unit 8c can be visually recognized from the front of the lamp.

The outer cover 4 allows light to be emitted in the first direction and the second direction. The outer cover 4 of the present embodiment has a first direction, that is, a first translucent surface 26 facing the front of the lamp, and a pair of second transmissive surfaces 28 facing the second direction, that is, the side of the lamp. The light emitted from each of the portion of the light emitting surface 18 of the first light emitting unit 8a and the second light emitting unit 8b that is visible from the front of the lamp and the entire light emitting surface 18 of the third light emitting unit 8c is mainly the first. It is emitted toward the front of the lamp through the translucent surface 26.

The light emitted from the light emitting surface 18 of the first light emitting unit 8a that overlaps with the second light emitting unit 8b when viewed from the front of the lamp is mainly reflected by the back surface 24 of the second light emitting unit 8b and is reflected by the pair of second light emitting units 8b. It is emitted toward the side of the lamp through the translucent surface 28. Of the light emitting surface 18 of the second light emitting unit 8b, the light emitted from the portion overlapping the third light emitting unit 8c when viewed from the front of the lamp is mainly reflected by the back surface 24 of the third light emitting unit 8c and is reflected by the pair of second light emitting units 8c. It is emitted toward the side of the lamp through the translucent surface 28.

The vehicle lamp 1 can function as a tail lamp and / or a stop lamp by emitting light in front of the lamp. Further, the vehicle lighting tool 1 can function as a rear side marker lamp by emitting light to the side of the lighting tool. For example, each of the planar light sources 14 of the first light emitting unit 8a to the third light emitting unit 8c is an organic EL panel that emits red light. The planar light source 14 of the first light emitting unit 8a and the second light emitting unit 8b is turned on by operating a light switch (not shown) mounted on the vehicle. Then, the tail lamp is turned on by emitting light from the first light emitting unit 8a and the second light emitting unit 8b to the front of the lamp.

Further, the light of the first light emitting unit 8a is reflected to the side of the lamp by the back surface 24 of the second light emitting unit 8b, and the light of the second light emitting unit 8b is reflected to the side of the lamp by the back surface 24 of the third light emitting unit 8c. As a result, the rear side marker lamp lights up. As a light distribution requirement, the side marker lamp illuminates a range of 45 ° on the front side of the vehicle and 45 ° on the rear side of the vehicle with reference to the normal on the side of the vehicle, and lights in the range of 75 ° to 90 ° on the front side of the vehicle. Is required not to be emitted. Therefore, the reflection characteristics of the back surface 24 of the second light emitting unit 8b and the third light emitting unit 8c are adjusted so as to satisfy the light distribution requirement.

Further, the third light emitting unit 8c is turned on by operating a brake pedal (not shown) mounted on the vehicle. Then, the stop lamp is turned on by emitting light from the third light emitting unit 8c in front of the lamp.

The vehicle body BD is provided so that at least a part of the second translucent surface 28 located on the outer side of the outer cover 4 in the vehicle width direction (the side indicated by the arrow OS in FIG. 4) is not covered by the vehicle body BD. Attached to. As a result, the light of the first light emitting unit 8a and the second light emitting unit 8b reflected to the side of the lamp can be more reliably used as the side marker lamp. An opening may be provided in the vehicle body BD so that at least a part of the second translucent surface 28 located outside in the vehicle width direction is exposed. Further, in the present embodiment, the second translucent surface 28 located inside in the vehicle width direction (the side indicated by the arrow IS in FIG. 4) is also attached to the vehicle body BD so as not to be covered with the vehicle body BD. As a result, the light emitting range of the vehicle lamp 1 can be expanded, and the visibility of the vehicle lamp 1 can be improved.

Further, each light emitting surface 18 of the first light emitting unit 8a to the third light emitting unit 8c has a pointed head 30 that gradually narrows from one end side to the other end side. In the present embodiment, the pointed head 30 is provided at the upper end of the first light emitting unit 8a to the third light emitting unit 8c. Then, at least a part of the pointed head 30 of the first light emitting unit 8a is located outside the second light emitting unit 8b when viewed from the first direction. Further, at least a part of the pointed head 30 of the second light emitting unit 8b is located outside the third light emitting unit 8c when viewed from the first direction. Further, the outer cover 4 has a third translucent surface 32 facing upward of the lamp. The pointed head 30 of each light emitting portion 8 can be visually recognized through the third translucent surface 32.

Further, the outer cover 4 has a shape that gradually narrows toward the front of the lamp. That is, the pair of second translucent surfaces 28 are inclined so that the distance between them gradually approaches from the rear of the lamp to the front of the lamp. Further, each of the second translucent surfaces 28 is inclined with respect to the front-rear axis of the vehicle. In the present embodiment, the second translucent surface 28 located on the outside in the vehicle width direction is inclined toward the inside in the vehicle width direction from the rear of the lamp to the front of the lamp, and the second translucent surface is located on the inside in the vehicle width direction. The surface 28 inclines toward the outside in the vehicle width direction from the rear of the lamp to the front of the lamp. The portion of the outer cover 4 that gradually narrows toward the front of the lamp protrudes outward from the vehicle body BD.

A lighting circuit 12 is arranged behind the lamp on the back plate 20. The lighting circuit 12 is a circuit that drives a plurality of light emitting units 8. The lighting circuit 12 and the first light emitting unit 8a to the third light emitting unit 8c are connected by, for example, a flexible printed circuit board 34. The lighting circuit 12 of the present embodiment supplies the plurality of light emitting units 8 with a current determined according to the size of the planar light source 14 in the smallest light emitting unit 8 of the planar light source 14 among the plurality of light emitting units 8. In the present embodiment, the smallest light emitting unit 8 of the planar light source 14 is the third light emitting unit 8c. Therefore, the magnitude of the current supplied by the lighting circuit 12 to the first light emitting unit 8a to the third light emitting unit 8c is set to the magnitude at which the planar light source 14 of the third light emitting unit 8c emits light with a desired brightness. ..

The brightness of the planar light source 14 changes according to the area of the planar light source 14 and the magnitude of the supplied current. When trying to obtain an arbitrary predetermined brightness, the larger the area of the planar light source 14, the larger the required current. Therefore, if the supplied currents have the same magnitude, the larger the area of the planar light source 14, the lower the brightness. In the present embodiment, the smallest planar light source 14 is arranged on the front side of the lamp, and the planar light source 14 gradually increases toward the rear of the lamp. Therefore, when each of the planar light sources 14 of the first light emitting unit 8a to the third light emitting unit 8c is turned on, gradation light emission in which the brightness gradually decreases from the front to the back of the lamp can be obtained.

As described above, the vehicle lamp 1 according to the present embodiment has the first light emitting unit 8a and the second light emitting unit 8b, each of which has a planar light source 14 and emits light in the first direction, and is transparent. It includes an outer cover 4 that has lightness and constitutes an outer housing of the vehicle lamp 1. The first light emitting unit 8a and the second light emitting unit 8b are arranged so that at least a part of the light emitting surface 18 of the first light emitting unit 8a faces the back surface 24 of the second light emitting unit 8b opposite to the light emitting surface 18. To. The back surface 24 constitutes a reflecting surface that reflects the light of the first light emitting unit 8a toward the second direction intersecting the first direction. Further, the outer cover 4 allows light to be emitted in the first direction and the second direction.

The light emission in the first direction can exert the first lamp function, and the light emission in the second direction can exert the second lamp function. That is, according to the present embodiment, one vehicle lighting tool can have a plurality of lighting tool functions. For light emission in the second direction, the first light emitting unit 8a and the second light emitting unit 8b are arranged in the first direction, and the light of the first light emitting unit 8a is directed to the second direction on the back surface 24 of the second light emitting unit 8b. It is realized by reflecting. Therefore, the vehicle lamp can be miniaturized as compared with the case where the light source for the first lamp function and the light source for the second lamp function are arranged independently. In particular, the ratio of the area of the vehicle lighting equipment to the vehicle body surface can be reduced.

Therefore, according to the present embodiment, it is possible to reduce the size of the vehicle lighting equipment while giving the vehicle lighting equipment a plurality of lighting equipment functions. Further, by combining the vehicle lighting equipment that exhibits the first lighting equipment function and the vehicle lighting equipment that has the second lighting equipment function into one, the number of vehicle lighting equipment mounted on the vehicle can be reduced. Therefore, the installation space of the entire lamp can be reduced. In addition, the number of parts of vehicle lighting equipment can be reduced and the weight can be reduced. As a result, the cost and weight of the vehicle can be reduced.

In the present embodiment, the vehicle lamp 1 is arranged behind the lamp, the first direction is the front of the lamp, and the second direction is the side of the lamp. Therefore, the vehicle lamp 1 can function as a tail lamp and / or a stop lamp by emitting light in front of the lamp. Further, the vehicle lamp 1 can function as a rear side marker lamp by emitting light to the side of the lamp.

The planar light source 14 is an organic EL element. By using the organic EL element, it is possible to more easily realize the miniaturization of the vehicle lighting equipment 1. In addition, the number of light emitting units 8 arranged can be increased while avoiding an increase in the size of the vehicle lamp 1.

The second light emitting unit 8b has a support plate 16 that supports the planar light source 14, and the surface of the support plate 16 facing the first light emitting unit 8a constitutes a reflective surface. As a result, the number of parts can be reduced as compared with the case where the plate material constituting the reflective surface is separately provided. Further, since it is easier to mirror-process the surface of the support plate 16 than to mirror-process the planar light source 14, a structure that reflects the light of the first light emitting unit 8a in the second direction can be easily realized. can do.

Further, a part of the light emitting surface 18 of the first light emitting unit 8a is located outside the second light emitting unit 8b when viewed from the first direction. Therefore, a part of the light emitting surface 18 of the first light emitting unit 8a can be visually recognized from the first direction. As a result, a sense of depth, that is, a three-dimensional appearance can be presented to the viewer, and the attractiveness and design of the vehicle lighting tool 1 can be enhanced. Further, since the first light emitting unit 8a is also used for a plurality of lamp functions, the vehicle lamp 1 can be miniaturized. In addition, the number of parts of the vehicle lighting tool 1 can be reduced and the weight can be reduced.

Further, the light emitting surface 18 of the first light emitting unit 8a and the light emitting surface of the second light emitting unit 8b have a pointed head 30 that gradually narrows from one end side to the other end side. Then, at least a part of the pointed head 30 of the first light emitting unit 8a is located outside the second light emitting unit 8b when viewed from the first direction. Therefore, at least a part of the pointed head 30 of the first light emitting unit 8a can be visually recognized from the first direction. As a result, the attractiveness and design of the vehicle lighting tool 1 can be improved.

Further, the outer cover 4 has a shape that gradually narrows toward the front of the lamp. As a result, the attractiveness and design of the vehicle lighting tool 1 can be improved.

Further, the vehicle lamp 1 includes a first light emitting unit 8a and a second light emitting unit 8b, and a plurality of light emitting units 8 having different sizes of the planar light sources 14 and a lighting circuit for driving the plurality of light emitting units 8. 12 and. The lighting circuit 12 supplies each light emitting unit 8 with a current determined according to the size of the planar light source 14 in the smallest light emitting unit 8 of the planar light source 14 among the plurality of light emitting units 8. As a result, a plurality of light emitting units 8 having different sizes of the planar light source 14 can be made to emit light with different brightness. As a result, the attractiveness and design of the vehicle lighting tool 1 can be improved.

In addition, it is possible to form a gradation emission in which the brightness gradually decreases from the front to the back of the lamp. Therefore, it is possible to present the viewer with an even deeper appearance. Therefore, the attractiveness and design of the vehicle lighting tool 1 can be further enhanced. Further, by determining the magnitude of the supplied current according to the smallest planar light source 14, it is possible to prevent an overcurrent from flowing to another planar light source 14. Further, by sharing the lighting circuit 12 among the plurality of light emitting units 8, it is possible to reduce the size and cost of the vehicle lamp 1. Further, other parts can be installed in the space in the lighting chamber 6 obtained by not mounting the plurality of lighting circuits 12. Therefore, it is possible to further increase the number of functions while suppressing the increase in size of the vehicle lighting tool 1.

(Embodiment 2)
The vehicle lighting fixture according to the second embodiment has the same configuration as the first embodiment except that the number of lighting circuits 12 is different. Hereinafter, the vehicle lighting equipment according to the present embodiment will be mainly described with a configuration different from that of the first embodiment, and the common configuration will be briefly described or omitted. FIG. 5 is a cross-sectional view of the vehicle lighting fixture according to the second embodiment.

The vehicle lighting tool 1 of the present embodiment has a first light emitting unit 8a, a second light emitting unit 8b, and a third light emitting unit 8c as a plurality of light emitting units 8. Further, the vehicle lamp 1 includes a first lighting circuit 12a for driving the first light emitting unit 8a, a second lighting circuit 12b for driving the second light emitting unit 8b, and a third lighting circuit for driving the third light emitting unit 8c. It has 12c and. Each lighting circuit 12 can independently drive the corresponding light emitting unit 8.

The first lighting circuit 12a drives the first light emitting unit 8a so that the brightness of the planar light source 14 of the first light emitting unit 8a is higher than the brightness of the planar light source 14 of the second light emitting unit 8b. As a result, the amount of light emitted from the first light emitting unit 8a can be increased, so that the amount of light emitted in the second direction can be increased. As a result, the vehicle lamp 1 can more reliably exert its function as a side marker lamp. Further, when the light of the first light emitting unit 8a is also emitted in the first direction, the amount of light emitted in the first direction can be increased. As a result, the brightness of the tail lamp can also be increased. The second lighting circuit 12b drives the second light emitting unit 8b so that the brightness of the planar light source 14 of the second light emitting unit 8b becomes a desired brightness. The third lighting circuit 12c drives the third light emitting unit 8c so that the brightness of the planar light source 14 of the third light emitting unit 8c becomes a desired brightness.

The embodiments of the present invention have been described in detail above. The above-described embodiment merely shows a specific example in carrying out the present invention. The content of the embodiment does not limit the technical scope of the present invention, and many design changes such as modification, addition, and deletion of components are made without departing from the idea of the invention defined in the claims. Is possible. The new embodiment with the design change has the effects of the combined embodiment and the modification. In the above-described embodiment, the contents that can be changed in such a design are emphasized by adding notations such as "in the present embodiment" and "in the present embodiment". Design changes are allowed even if there is no content. Any combination of the above components is also valid as an aspect of the present invention. The hatching attached to the cross section of the drawing does not limit the material of the object to which the hatching is attached.

In the embodiment, the vehicle lamp 1 is a rear combination lamp, and the rear side marker lamp is composed of the lights of the first light emitting unit 8a and the second light emitting unit 8b reflected toward the side of the lamp. However, the present invention is not limited to this configuration, and the vehicle lamp 1 may be used as a headlamp, and the front side marker lamp may be configured by the light of the first light emitting unit 8a and the second light emitting unit 8b reflected toward the side of the lamp. Good.

Further, in the embodiment, the surface of the support plate 16 constitutes a reflective surface. However, the present invention is not limited to this configuration, for example, the support plate 16 is used as a frame to support the outer periphery of the planar light source 14, the back surface of the planar light source 14 is exposed, and the exposed back surface is used as a reflecting surface. May be good. Further, a reflector may be provided on the back surface of the planar light source 14.

Further, in the embodiment, a part of the light emitting surface 18 of the first light emitting unit 8a is arranged outside the second light emitting unit 8b when viewed from the front of the lamp, and a part of the light of the first light emitting unit 8a is directed to the front of the lamp. It is emitted to. However, the present invention is not limited to this configuration, and the entire light emitting surface 18 of the first light emitting unit 8a may be overlapped with the second light emitting unit 8b, and the first light emitting unit 8a may be used as a light source dedicated to the side marker lamp. Further, in the present embodiment, a part of the light emitting surface 18 of the second light emitting unit 8b is overlapped with the third light emitting unit 8c, and a part of the light of the second light emitting unit 8b is emitted to the side of the lamp. However, the present invention is not limited to this configuration, and the entire light emitting surface 18 of the second light emitting unit 8b may not overlap with the third light emitting unit 8c, and the second light emitting unit 8b may be used as a light source dedicated to the tail lamp.

Further, a part of the light emitting surface 18 of the first light emitting unit 8a is arranged outside the second light emitting unit 8b when viewed from the front of the lamp, and the entire light emitting surface 18 of the second light emitting unit 8b is overlapped with the third light emitting unit 8c. The first light emitting unit 8a may be used as a light source for the side marker lamp and the tail lamp, and the second light emitting unit 8b may be used as a light source dedicated to the side marker lamp. Further, the first light emitting unit 8a and the second light emitting unit 8b may be used as a light source dedicated to the side marker lamp, the third light emitting unit 8c may be used as a light source dedicated to the tail lamp, and the fourth light source (not shown) may be used as a light source dedicated to the stop lamp. The roles of the light emitting units 8 can be appropriately combined. The number of light emitting units 8 is not limited to three. For example, the third light emitting unit 8c may be omitted. In addition, two or more light emitting units may be arranged on the front side of the lamp of the second light emitting unit 8b. In addition, one or more light emitting units may be arranged on the rear side of the lamp fixture of the first light emitting unit 8a.

The present invention can be used for vehicle lamps.

1 Vehicle lighting equipment, 4 Outer cover, 8 Light emitting part, 8a 1st light emitting part, 8b 2nd light emitting part, 8c 3rd light emitting part, 12 lighting circuit, 12a 1st lighting circuit, 12b 2nd lighting circuit, 12c 3rd Lighting circuit, 14 planar light source, 16 support plate, 18 light emitting surface, 24 back surface, 30 pointed head.

Claims

A first light emitting unit and a second light emitting unit, each of which has a planar light source and emits light in the first direction,
It is equipped with an outer cover that is translucent and constitutes the outer housing of vehicle lighting equipment.
The first light emitting unit and the second light emitting unit are arranged so that at least a part of the light emitting surface of the first light emitting unit faces the back surface of the second light emitting unit opposite to the light emitting surface.
The back surface constitutes a reflecting surface that reflects the light of the first light emitting unit in the second direction intersecting with the first direction.
The outer cover is a vehicle lighting fixture that allows light to be emitted in the first direction and the second direction.
The vehicle lamp according to claim 1, wherein the planar light source is an organic EL element.
The vehicle lamp according to claim 1 or 2, wherein the first direction is the front of the lamp and the second direction is the side of the lamp.
The second light emitting unit has a support plate that supports the planar light source, and has a support plate.
The vehicle lighting tool according to any one of claims 1 to 3, wherein the surface of the support plate facing the first light emitting portion side constitutes the reflective surface.
The vehicle lighting device according to any one of claims 1 to 4, wherein a part of the light emitting surface of the first light emitting unit is located outside the second light emitting unit when viewed from the first direction.
The light emitting surface of the first light emitting unit and the light emitting surface of the second light emitting unit have a pointed head that gradually narrows from one end side to the other end side.
The vehicle lighting device according to any one of claims 1 to 5, wherein at least a part of the pointed head of the first light emitting unit is located outside the second light emitting unit when viewed from the first direction.
The vehicle lighting device according to any one of claims 1 to 6, wherein the outer cover has a shape that gradually narrows toward the front of the lighting device.
The vehicle lamp is composed of at least the first light emitting unit and the second light emitting unit, and includes a plurality of light emitting units having different sizes of the planar light sources.
A lighting circuit for driving the plurality of light emitting units is provided.
Any of claims 1 to 7, wherein the lighting circuit supplies a current determined according to the size of the planar light source in the smallest light emitting portion of the planar light source among the plurality of light emitting units to the plurality of light emitting units. The vehicle lighting equipment described in item 1.
The vehicle lighting fixture includes a first lighting circuit that drives the first light emitting unit and the first lighting circuit.
A second lighting circuit for driving the second light emitting unit is provided.
The first lighting circuit drives the first light emitting unit so that the brightness of the planar light source of the first light emitting unit is higher than the brightness of the planar light source of the second light emitting unit. The vehicle lighting equipment according to any one of 7.