Vehicle lighting

Abstract

To provide a vehicular lighting fixture capable of enhancing visibility.SOLUTION: A vehicular lighting fixture comprises: a plurality of light sources which emit excitation light; an optical member which is provided for each of the light sources, and guides and emits the excitation light from the light source; a light generation part which has a light emission layer provided for each of optical members and irradiated with the excitation light emitted from the optical member to emit generated light; a lens member which is provided for each of light emission layers and arranged on the front side of the light emission layer, and irradiates the front in a vehicle mounted state with the generated light from the light emission layer; and a light source control part which controls electric power supplied to the plurality of light sources, wherein the light generation parts are arranged, side by side, in the right-left direction in the vehicle mounted state, and the light generation parts arranged outside the vehicle are located on back sides with respect to the light generation parts arranged inside the vehicle.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to vehicle lamps.

Background Art

[0002] There is known a vehicle lamp including a light source, a reflector that reflects excitation light from the light source, a light emitting layer that emits generated light when irradiated with the excitation light reflected by the reflector, and a lens member that irradiates excitation light from the light emitting layer (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the vehicle lamp as described above, it is required to enhance visibility so as to be clearly visible from the outside.

[0005] The present disclosure has been made in view of the above, and an object thereof is to provide a vehicle lamp capable of enhancing visibility.

Means for Solving the Problems

[0006] The vehicle lighting device according to this disclosure comprises a plurality of light sources that emit excitation light; an optical member provided for each light source that emits the excitation light from the light source; a light generating unit provided for each optical member and having a light-emitting layer that emits generated light when irradiated with the excitation light emitted from the optical member; a lens member provided for each light-emitting layer, positioned on the front side relative to the light-emitting layer, that irradiates the generated light from the light-emitting layer in the front direction when mounted on a vehicle; and a light source control unit that controls the power supplied to the plurality of light sources, wherein the light generating units are arranged in the left-right direction when mounted on a vehicle, and the light generating units positioned on the outside of the vehicle are positioned on the rear side more than the light generating units positioned on the inside of the vehicle. [Effects of the Invention]

[0007] According to this disclosure, it is possible to provide vehicle lighting devices that can improve visibility. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is an exploded perspective view showing an example of a vehicle lighting fixture according to this embodiment. [Figure 2] Figure 2 is a side cross-sectional view showing an example of a vehicle lighting fixture. [Figure 3] Figure 3 shows an example of the arrangement of multiple photogenerating units. [Figure 4] Figure 4 shows an example of the arrangement of multiple photogenerating units. [Figure 5] Figure 5 shows an example of the arrangement of multiple photogenerating units. [Figure 6] Figure 6 shows an example of the arrangement of multiple photogenerating units. [Figure 7] Figure 7 shows an example of the illumination state of a vehicle light fixture. [Figure 8] Figure 8 shows another example of the arrangement of the light source, light guide member, and light generation unit. [Figure 9] Figure 9 shows another example of the arrangement of the light source, light guide member, and light generation unit. [Figure 10]Figure 10 shows another example of the arrangement of the light source, light guide member, and light generation unit. [Figure 11] Figure 11 shows another example of the arrangement of the light source, light guide member, and light generation unit. [Modes for carrying out the invention]

[0009] Hereinafter, embodiments of the vehicle lighting device according to this disclosure will be described with reference to the drawings. However, this invention is not limited by these embodiments. Furthermore, the components in the embodiments below include those that are easily substituted or substantially identical to those that are easily substituted by those skilled in the art. In the following description, the front-rear, up-down, and left-right directions refer to the directions when the vehicle lighting device is mounted on a vehicle, as viewed from the driver's seat in the direction of vehicle travel. In this embodiment, the up-down direction is parallel to the vertical direction, and the left-right direction is the horizontal direction. Furthermore, the front direction is defined as the direction in which light is emitted from the vehicle lighting device, and the opposite direction to the front direction is defined as the rear direction.

[0010] Figure 1 is a schematic exploded perspective view showing an example of a vehicle lighting fixture 100 according to this embodiment. Figure 2 is a schematic side cross-sectional view showing an example of a vehicle lighting fixture 100. The vehicle lighting fixture 100 shown in Figures 1 and 2 is, for example, a signal light such as a taillight. Therefore, in this embodiment, the front direction is the rear direction, and the rear direction is the front direction. Also, the left direction is the outside of the vehicle, and the right direction is the inside of the vehicle. The vehicle lighting fixture 100 includes a light source unit 10, a light guide member (optical member) 20, a light generation unit 30, a lens member 40, a housing 50, and a light source control unit 60.

[0011] The light source unit 10 includes a light source 11 and a support substrate 12. The light source 11 is a light source such as an LED or an organic EL. The number of light sources 11 provided is the same as the number of light generation units 30 described later. The light source 11 has a light emitting surface 11a facing upward. The light source 11 emits blue light from the light emitting surface 11a as excitation light. Note that the light source 11 is not limited to a light source that emits blue light, and a light source capable of irradiating light with a shorter wavelength (violet light, ultraviolet light, etc.) than the wavelength of the generated light generated in the light generation unit 30 described later can be used.

[0012] The light guide member 20 is provided for each light source 11 and is disposed above each light source 11. The light guide member 20 is disposed inside the housing 50. The light guide member 20 is disposed so as to be hidden by the housing 50 so that it cannot be directly seen when the vehicle lamp 100 is viewed from the front side.

[0013] The light guide member 20 has a first incident surface 21, a second incident surface 22, a first reflection surface 23, a first light guide portion 24, a second reflection surface 25, a second light guide portion 26, a third reflection surface 27, and an emission surface 28.

[0014] The first incident surface 21 is disposed above the light source 11 and faces the light emitting surface 11a. Light traveling upward from the light emitting surface 11a enters the first incident surface 21. The second incident surface 22 is disposed so as to surround the side of the light emitting surface 11a of the light source 11. Light traveling laterally from the light emitting surface 11a enters the second incident surface 22. The first reflection surface 23 internally reflects the light incident from the second incident surface 22.

[0015] The first light guide portion 24 extends obliquely upward in the front direction from the portion where the first incident surface 21 and the second incident surface 22 are provided. The first light guide portion 24 guides the excitation light incident from the first incident surface 21 and the excitation light incident from the second incident surface 22 and reflected by the first reflection surface 23.

[0016] [[ID=第十九]] The second reflection surface 25 is disposed on the upper surface of the first light guide portion 24. The second reflection surface 25 internally reflects the excitation light guided by the first light guide portion 24 toward the second light guide portion 26.

[0017] The second light guide part 26 extends from the first light guide part 24 toward the front side. A part of the second light guide part 26 is provided so as to protrude from the light generation part 30 toward the front side. The second light guide part 26 guides the excitation light internally reflected by the second reflection surface 25 toward the front side.

[0018] The third reflection surface 27 is provided at the front-side end of the second light guide part 26. The third reflection surface 27 internally reflects the excitation light guided by the second light guide part 26 downward.

[0019] The emission surface 28 is provided on the lower surface of the second light guide part 26. The emission surface 28 emits the excitation light internally reflected by the third reflection surface 27 downward.

[0020] Thus, the light guide member 20 is arranged so as to protrude from the back side of the light generation part 30 upward and then迂回 around to the front side. With this arrangement, the light guide member 20 guides the excitation light emitted from the light source 11 arranged on the back side of the light generation part 30 to reach the front side via above the light generation part 30, and irradiates the light emitting layer 32 arranged in front of the light generation part 30.

[0021] The light generation part 30 is provided for each light guide member 20. A plurality of light generation parts 30 are arranged in the left-right direction. The light generation part 30 is arranged so that the normal direction R of the light emitting layer 32 is inclined obliquely upward with respect to the front direction. With this arrangement, the light generation part 30 makes it easier for the light emitted from the emission surface 28 of the light guide member 20 to reach the light emitting layer 32. The light generation part 30 includes a holding member 31 and a light emitting layer 32.

[0022] The holding member 31 is capable of transmitting the excitation light emitted from the light source 11. By transmitting the excitation light, the holding member 31 guides the excitation light inside the holding member 31 and can irradiate the entire surface of the light emitting layer 32 described later. In the present embodiment, the holding member 31 is, for example, in the shape of a rectangular plate and is capable of transmitting the generated light emitted by the light emitting layer 32 described later. As such a holding member 31, for example, glass or the like is used.

[0023] The light-emitting layer 32 is held on the first surface 31a of the holding member 31. The light-emitting layer 32 is excited when irradiated with excitation light from the light source 11 and emits generated light. The light-emitting layer 32 is held on, for example, the first surface 31a of the holding member 31. The light-emitting layer 32 is formed in a shape that corresponds to, for example, the shape of the tail lamp in a front view. For example, the light-emitting layer 32 may have a predetermined pattern (not shown).

[0024] In this embodiment, the light-emitting layer 32 is, for example, an organic material obtained by doping a host material such as polyvinylcarbazole with a guest material such as acetylacetone at a concentration of about 5%. In this case, the light-emitting layer 32 emits red light as generated light. The combination of the host material and the guest material is not limited to the above.

[0025] When the light-emitting layer 32 is made of an organic material, it can be formed, for example, by co-depositing a host material and a guest material onto the holding member 31. Alternatively, the light-emitting layer 32 may be formed by a wet method such as spin coating or spray coating. When an organic material is used as the light-emitting layer 32, the holding member 31 can be a substrate such as glass.

[0026] Furthermore, an inorganic material such as CASN (CaAlSiN3:Eu) may be used as the light-emitting layer 32. In this case, the light-emitting layer 32 can be formed by applying a mixed material of a transparent resin such as silicone and CASN onto the holding member 31 and baking it. Alternatively, the light-emitting layer 32 can be formed by applying a mixed material of an inorganic material such as low-melting-point glass and CASN onto the holding member 31 and baking it.

[0027] When an inorganic material is used as the light-emitting layer 32, the holding member 31 can be a substrate such as glass. Alternatively, other types of materials such as SCASN(Sr,Ca)AlSiN3:Eu may be used as the light-emitting layer 32.

[0028] Figures 3 to 6 show examples of arrangements of multiple photogenerating units 30. Figures 3 to 6 schematically show the multiple photogenerating units 30 as viewed from above. In Figures 3 to 6, for example, three photogenerating units 30 are arranged in the left-right direction. Note that the number of photogenerating units 30 is not limited to three, but may be two or four or more.

[0029] As shown in Figures 3 to 6, the multiple light-generating units 30 are arranged in a left-right direction when mounted on a vehicle. Furthermore, the light-generating units 30 located on the outside of the vehicle are positioned further back than the light-generating units 30 located on the inside of the vehicle. This configuration allows for an arrangement that corresponds to the so-called slant shape of the vehicle, enabling a compact arrangement of the multiple light-generating units 30 and a design that conforms to the shape of the vehicle.

[0030] In the examples shown in Figures 3 and 4, the multiple light-generating units 30 are arranged so that the normal direction R of the light-emitting layer 32 faces forward. In Figure 3, the multiple light-generating units 30 are arranged apart from each other in the left-right direction. This arrangement allows each light-generating unit 30 to form an independent pattern when emitting light. In Figure 4, the multiple light-generating units 30 are arranged so that adjacent light-generating units 30 partially overlap in the left-right direction. This arrangement allows the light-emitting patterns from the multiple light-generating units 30 to be connected when emitting light.

[0031] In the examples shown in Figures 5 and 6, the multiple light-generating units 30 are arranged such that the light-generating units 30 located on the outside of the vehicle have a more inclined orientation (normal R) of the light-emitting layer 32 towards the outside of the vehicle relative to the front direction than the light-generating units 30 located on the inside of the vehicle. This arrangement ensures visibility when viewed from an oblique direction on the outside of the vehicle relative to the front when the light is emitted. In Figure 5, the multiple light-generating units 30 are arranged separated from each other in the left-right direction. This configuration allows each light-generating unit 30 to form an independent pattern when the light is emitted. In Figure 6, the multiple light-generating units 30 are arranged partially overlapping each other in the left-right direction. This configuration allows the light-emitting patterns from the multiple light-generating units 30 to be connected when the light is emitted.

[0032] The lens member 40 is positioned in a frontal direction relative to the light generation unit 30. The lens member 40 has an incident surface 41 and an exit surface 42. Red light, which is generated light from the light generation unit 30, is incident on the incident surface 41. The exit surface 42 emits the light incident on the incident surface 41 in a forward direction. The lens member 40 transmits red light and absorbs light other than red light. Therefore, the excitation light component contained in the external light is absorbed by the lens member 40. The lens member 40 is held by, for example, a housing 50.

[0033] The housing 50 is formed using a resin material such as black. The housing 50 supports or houses the light source unit 10, light guide member 20, light generation unit 30, lens member 40, and light source control unit 60 described above.

[0034] Next, the operation of the vehicle lighting device 100 configured as described above will be explained. By supplying power to the light source 11 from the light source control unit 60, the light source 11 can be lit. When the light source 11 is lit, a portion of the excitation light Lb emitted from the light-emitting surface 11a is irradiated either directly to the light-emitting layer 32 or through the holding member 31.

[0035] When the light-emitting layer 32 is irradiated with excitation light Lb, the light-emitting layer 32 is excited and emits red light L. A portion of the red light L generated in the light-emitting layer 32 is emitted backward (towards the front). Also, if a reflective layer is formed on the second surface 31b of the holding member 31, a portion of the red light generated in the light-emitting layer 32 is emitted forward (towards the back), reflected by the reflective layer, and propagates backward. Therefore, the red light L generated in the light-emitting layer 32 is emitted forward as planar light. This red light L is incident on the incident surface 41 of the lens member 40 and emitted forward from the exit surface 42, illuminating, for example, as a taillight pattern.

[0036] The light source control unit 60 can control the power supplied to the light source 11 so that the larger the area of ​​overlap between the light generation units 30 in the left-right direction, the greater the power supplied to the light source 11. For example, the area of ​​overlap between the light generation units 30 in the left-right direction is larger in the arrangement shown in Figure 4 than in the arrangement shown in Figure 3. In this case, the light source control unit 60 can control the power supplied to the light source 11 so that the power supplied to the light source 11 is greater in the arrangement shown in Figure 4 than in the arrangement shown in Figure 3. Similarly, the area of ​​overlap between the light generation units 30 in the left-right direction is larger in the arrangement shown in Figure 6 than in the arrangement shown in Figure 5. In this case, the light source control unit 60 can control the power supplied to the light source 11 so that the power supplied to the light source 11 is greater in the arrangement shown in Figure 6 than in the arrangement shown in Figure 5.

[0037] Furthermore, the light source control unit 60 can control the power supplied to the light source 11 to increase as the angle at which the light generation unit 30 is tilted outward relative to the front direction increases. For example, the arrangement shown in Figure 5 has a larger angle at which the light generation unit 30 is tilted outward relative to the front direction compared to the arrangement shown in Figure 3. In this case, the light source control unit 60 can control the power supplied to the light source 11 to increase in the arrangement shown in Figure 5 compared to the arrangement shown in Figure 3. Similarly, the arrangement shown in Figure 6 has a larger angle at which the light generation unit 30 is tilted outward relative to the front direction compared to the arrangement shown in Figure 4. In this case, the light source control unit 60 can control the power supplied to the light source 11 to increase in the arrangement shown in Figure 6 compared to the arrangement shown in Figure 4.

[0038] Figure 7 shows an example of the light emission state of the vehicle light fixture 100. The example shown in Figure 7 is explained using the case where multiple light generating units 30 of the vehicle light fixture 100 partially overlap in the left-right direction, and the light generating units 30 located on the outside of the vehicle are tilted outward more than the light generating units 30 located on the inside of the vehicle (the arrangement shown in Figure 6).

[0039] As shown in Figure 7, when the multiple light-generating units 30 are arranged so that they partially overlap in the left-right direction, the light-emitting patterns P from the multiple light-generating units 30 appear connected when the illuminated vehicle light fixture 100 is viewed from the front. This improves the aesthetic appearance when the light is emitted.

[0040] Furthermore, as shown in Figure 7, in an arrangement where the light-emitting layer 32 normal direction R of the light-emitting layer 32 is tilted outward relative to the front direction for the light-emitting unit 30 located on the outside of the vehicle than for the light-emitting unit 30 located on the inside of the vehicle, visibility can be ensured when viewed from a direction corresponding to the slant shape of the vehicle, for example, a direction tilted outward relative to the front of the vehicle light fixture 100. Therefore, the aesthetic appearance in the illuminated state can be improved.

[0041] Figures 8 to 11 show other examples of the arrangement of the light source unit 10, the light guide member 20, and the light generation unit 30. In the example shown in Figure 8, the light guide member 20A is positioned above the light source unit 10, and the light generation unit 30 is positioned above the light guide member 20A. The light guide member 20A has a first incident surface 21A, a second incident surface 22A, and a first reflective surface 23A on its lower surface facing the light source unit 10. The light guide member 20A also has an exit surface 28A on its upper surface facing the light generation unit 30. In this case, excitation light from the light source 11 is incident from the first incident surface 21A and the second incident surface 22A. The excitation light Lb incident from the first incident surface 21A and the excitation light Lb incident from the second incident surface 22A and reflected by the first reflective surface 23A are emitted upward from the exit surface 28A. The excitation light Lb emitted from the emission surface 28A irradiates the photogenerating unit 30. When the photogenerating unit 30 is irradiated with the excitation light Lb, the light-emitting layer 32 is excited and emits red light L, which is emitted in the forward direction.

[0042] In the example shown in Figure 9, a light guide member 20B is positioned above the light source unit 10, and a light generation unit 30 is positioned above the light guide member 20B. The light guide member 20B has an incident surface 21B on its lower surface facing the light source unit 10. A Fresnel lens portion 22B is formed on the incident surface 21B. The Fresnel lens portion 22B focuses the incident light. The light guide member 20B also has an exit surface 28B on its upper surface facing the light generation unit 30. In this case, excitation light Lb from the light source 11 enters through the Fresnel lens portion 22B on the incident surface 21B. The incident excitation light Lb is focused by the Fresnel lens portion 22B and emitted upward from the exit surface 28B. The excitation light Lb emitted from the exit surface 28B irradiates the light generation unit 30. When the photogenerating unit 30 is irradiated with excitation light Lb, the light-emitting layer 32 is excited and emits red light L, which is emitted in the forward direction.

[0043] In the example shown in Figure 10, a light guide member 20C is positioned above the light source unit 10, and a light generation unit 30 is positioned above the light guide member 20C. The light guide member 20C has an incident surface 21C on its lower surface facing the light source unit 10. The light guide member 20C also has an exit surface 28C on its upper surface facing the light generation unit 30. A Fresnel lens portion 22C is formed on the exit surface 28C. The Fresnel lens portion 22C focuses the emitted light. In this case, excitation light Lb from the light source 11 is incident from the incident surface 21C. The incident excitation light Lb is focused by the Fresnel lens portion 22C and emitted upward from the exit surface 28C. The excitation light Lb emitted from the exit surface 28C irradiates the light generation unit 30. When the photogenerating unit 30 is irradiated with excitation light Lb, the light-emitting layer 32 is excited and emits red light L, which is emitted in the forward direction.

[0044] In the example shown in Figure 11, a light guide member 20D is positioned on the front side of the light source unit 10, and a light generation unit 30 is positioned above the light guide member 20D. The light source unit 10 is positioned with the light-emitting surface 11a of the light source 11 facing forward. The light guide member 20D is configured to extend from the incident surface 21D facing the light source unit 10 toward the front. The light guide member 20D has a prism section 22D on its lower surface 27D. The prism section 22D reflects the excitation light Lb guiding the light guide member 20D upward in a diffused state. The light guide member 20D also has an exit surface 28D on its upper surface facing the light generation unit 30. In this case, the excitation light Lb from the light source 11 is incident from the incident surface 21D. The excitation light Lb incident from the incident surface 21D travels through the inside of the light guide member 20D toward the front and is reflected upward by the prism section 22D. The excitation light Lb reflected by the prism section 22D is emitted upward from the emission surface 28D. The excitation light Lb emitted upward from the emission surface 28D irradiates the photogenerating section 30. When the photogenerating section 30 is irradiated with the excitation light Lb, the light-emitting layer 32 is excited and emits red light L, which is emitted in the forward direction.

[0045] As described above, the vehicle lighting device 100 according to this embodiment includes a plurality of light sources 11 that emit excitation light Lb, a light guide member 20 provided for each light source 11 that guides and emits the excitation light Lb from the light source 11, a light generation unit 30 provided for each light guide member 20 that emits generated light when irradiated with the excitation light Lb emitted from the light guide member 20, a lens member 40 provided for each light emitter 32 that is positioned on the front side relative to the light emitter 32 and irradiates the generated light from the light emitter 32 in the front direction when mounted on a vehicle, and a light source control unit 60 that controls the power supplied to the plurality of light sources 11, wherein the light generation units 30 are arranged in the left-right direction when mounted on a vehicle, and the light generation units 30 positioned on the outside of the vehicle are positioned on the rear side more than the light generation units 30 positioned on the inside of the vehicle.

[0046] With this configuration, the multiple light-generating units 30 are arranged in the left-right direction when mounted on the vehicle, and the light-generating units 30 located on the outside of the vehicle are positioned further back than the light-generating units 30 located on the inside of the vehicle. This allows for an arrangement that corresponds to the so-called slant shape of the vehicle. As a result, visibility can be enhanced so that the unit is clearly visible from the outside.

[0047] In the vehicle lighting device 100 according to this embodiment, the multiple light-generating units 30 are arranged such that adjacent light-generating units 30 partially overlap in the left-right direction. With this configuration, when the light is emitted, the light-emitting patterns of the multiple light-generating units 30 are connected to each other.

[0048] In the vehicle lighting device 100 according to this embodiment, the light source control unit 60 controls the power supplied to the light source 11 to increase as the area of ​​the overlapping portion of the light generation units 30 in the left-right direction increases. This configuration makes it possible to suppress the decrease in light utilization efficiency caused by the overlapping of the light generation units 30 in the left-right direction.

[0049] In the vehicle lighting device 100 according to this embodiment, the multiple light generating units 30 are arranged such that the light generating units 30 located on the outside of the vehicle are inclined outward relative to the front direction compared to the light generating units 30 located on the inside of the vehicle. This configuration ensures visibility when viewed from an oblique direction on the outside of the vehicle relative to the front when the light is emitted.

[0050] In the vehicle lighting device 100 according to this embodiment, the light source control unit 60 controls the power supplied to the light source 11 to increase as the angle at which the light generation unit 30 is tilted toward the outward direction relative to the front direction increases. With this configuration, a decrease in light utilization efficiency due to the tilting of the light generation unit 30 toward the outward direction relative to the front direction can be suppressed.

[0051] In the vehicle lighting device 100 according to this embodiment, the light source 11 is positioned on the rear side of the light generation unit 30 and emits excitation light Lb upward. The light guide member 20 is positioned above the light source 11 and the light generation unit 30, and guides the excitation light Lb from the light source 11 to the front side and emits it downward toward the light generation unit 30. The light generation unit 30 has a light-emitting layer 32 formed in a flat plate shape, and is positioned so that the normal direction R of the light-emitting layer 32 faces diagonally upward with respect to the front. With this configuration, the light source 11, the light guide member 20, and the light generation unit 30 can be compactly arranged in a limited space.

[0052] In the vehicle lighting device 100 according to this embodiment, the light guide member 20 has a first incident surface 21 that faces the light source 11 in the vertical direction and a second incident surface 22 that surrounds the side of the light source 11. With this configuration, excitation light Lb directed upward from the light source 11 and excitation light Lb directed laterally from the light source 11 can be incident on the light guide member 20. This makes it possible to increase the utilization efficiency of the excitation light Lb.

[0053] In the vehicle lighting device 100 according to this embodiment, the light guide members 20B and 20C are provided on the incident surface 21B into which the excitation light Lb from the light source 11 is incident, or on the exit surface 28C into which the excitation light Lb is emitted, and have Fresnel lens portions 22B and 22C that concentrate the excitation light Lb. With this configuration, the utilization efficiency can be increased by concentrating the excitation light Lb from the light source 11 while keeping the thickness of the light guide members 20B and 20C low.

[0054] In the vehicle light fixture 100 according to this embodiment, the light guide member 20D has a prism portion 22D that internally reflects the guided excitation light Lb so as to diffuse it toward the light-emitting layer 32. With this configuration, the excitation light Lb can be emitted with a uniform amount of light by the prism portion 22D.

[0055] The scope of this disclosure is not limited to the embodiments described above, and modifications can be made as appropriate without departing from the spirit of this disclosure. For example, the arrangement of the light source unit 10, light guide members 20 (including light guide members 20A to 20D), and light generation unit 30 shown in the embodiments described above may be reversed vertically.

[0056] Furthermore, although the above embodiment described an example in which light guide members 20, 20A to 20D that guide and emit excitation light are used as optical elements, the configuration is not limited to this. The optical elements may be other optical elements such as lenses, reflective members, etc., or combinations thereof, as long as they are configured to emit excitation light from the light source 11, in place of the light guide members 20, 20A to 20D, or in addition to the light guide members 20, 20A to 20D. [Explanation of Symbols]

[0057] L...Red light, P...Emission pattern, R...Normal direction, EL...Organic, Lb...Excitation light, 10...Light source unit, 11...Light source, 11a...Emitting surface, 12...Support substrate, 20,20A,20B,20C,20D...Light guide members, 21,21A...First incident surface, 21B,21C,21D,41...Incident surface, 22,22A...Second incident surface, 22B,22C...Fresnel lens unit, 22D...P Rhythm section, 23, 23A...First reflective surface, 24...First light guide section, 25...Second reflective surface, 26...Second light guide section, 27...Third reflective surface, 28, 28A, 28B, 28C, 28D, 42...Emitting surface, 30...Light generating section, 31...Holding member, 31a...First surface, 31b...Second surface, 32...Light emitting layer, 40...Lens member, 50...Housing, 60...Light source control section, 100...Vehicle lighting fixture

Claims

1. Multiple light sources that emit excitation light, An optical member provided for each of the aforementioned light sources, which emits the excitation light from the light source, A light generating unit is provided for each optical member and has a light-emitting layer that emits generated light when irradiated with the excitation light emitted from the optical member, A lens member is provided for each of the aforementioned light-emitting layers, positioned on the front side of the light-emitting layer, and irradiates the generated light from the light-emitting layer in the forward direction when mounted on the vehicle. A light source control unit that controls the power supplied to multiple light sources, and Equipped with, The light-generating units are arranged in a left-right direction when mounted on a vehicle, and the light-generating units located on the outside of the vehicle are positioned further back than the light-generating units located on the inside of the vehicle. Multiple photo-generating units are arranged such that adjacent photo-generating units partially overlap in the left-right direction. Vehicle lighting fixtures.

2. A plurality of light sources that emit excitation light, An optical member provided for each of the aforementioned light sources, which emits the excitation light from the light source, A light generating unit is provided for each optical member and has a light-emitting layer that emits generated light when irradiated with the excitation light emitted from the optical member, A lens member is provided for each of the aforementioned light-emitting layers, positioned on the front side of the light-emitting layer, and irradiates the generated light from the light-emitting layer in the forward direction when mounted on the vehicle. A light source control unit that controls the power supplied to multiple light sources, and Equipped with, The light-generating units are arranged in a left-right direction when mounted on a vehicle, and the light-generating units located on the outside of the vehicle are positioned further back than the light-generating units located on the inside of the vehicle. The optical member consists of a light guide member, The light source is positioned on the rear side of the light generation unit and emits the excitation light upward. The light guide member is positioned above the light source and the light generating unit, guides the excitation light from the light source to the front side, and emits it downward toward the light generating unit. The light-generating unit has a light-emitting layer formed in a flat plate shape, and is positioned so that the normal direction of the light-emitting layer is obliquely upward relative to the front. Vehicle lighting fixtures.

3. The light source control unit controls the power supplied to the light source so that the larger the area of ​​the overlapping portion of the light generation units in the left-right direction, the greater the power supplied to the light source. A vehicle light fixture according to claim 1.

4. The multiple light-generating units are arranged such that the light-generating units located on the outside of the vehicle are more inclined outward relative to the front direction than the light-generating units located on the inside of the vehicle. A vehicle light fixture according to claim 1 or claim 2.

5. The light source control unit controls the power supplied to the light source so that the greater the angle at which the light generation unit is tilted toward the outward direction of the vehicle relative to the front direction, the greater the power supplied to the light source. The vehicle light fixture according to claim 4.

6. The optical member consists of a light guide member, The light guide member has a first incident surface that faces the light source in the vertical direction and a second incident surface that surrounds the side of the light source. A vehicle light fixture according to claim 1 or claim 2.

7. The optical member consists of a light guide member, The light guide member is provided on the incident surface into which the excitation light from the light source enters or on the exit surface into which the excitation light exits, and has a Fresnel lens portion that focuses the excitation light. A vehicle light fixture according to claim 1 or claim 2.

8. The optical member consists of a light guide member, The light guide member has a prism portion that internally reflects the guided excitation light so as to diffuse it toward the light-emitting layer. A vehicle light fixture according to claim 1 or claim 2.

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