Vehicle lamp

Abstract

The invention provides a vehicle lamp capable of improving visibility. The vehicle lamp includes: a plurality of light sources that emit excitation light; optical members that are provided for each of the light sources, guide the excitation light from the light sources, and emit the excitation light; a light generation unit provided for each optical member, the light generation unit having a light-emitting layer that emits generated light by being irradiated with excitation light emitted from the optical member; a lens member which is provided for each light-emitting layer, is disposed on the front surface side with respect to the light-emitting layer, and irradiates the generated light from the light-emitting layer in the front surface direction in a vehicle-mounted state; and a light source control unit that controls power supplied to the plurality of light sources, the light generation units being arranged in the left-right direction in a vehicle-mounted state, and the light generation units arranged on the outside of the vehicle being located on the back side than the light generation units arranged on the inside of the vehicle.

Description

Technical Field

[0001] The present invention relates to a vehicle lamp. Background Art

[0002] A vehicle lamp is known, which includes a light source, a reflector that reflects excitation light from the light source, a light-emitting layer that emits generated light by being irradiated with the excitation light reflected by the reflector, and a lens member that irradiates the excitation light from the light-emitting layer (for example, refer to Patent Document 1).

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2022-79423 Summary of the Invention

[0006] Problems to be Solved by the Invention

[0007] In the vehicle lamp as described above, it is desired to improve visibility in a manner that can be clearly visible from the outside.

[0008] The present disclosure has been made in view of the above circumstances, and an object thereof is to provide a vehicle lamp capable of improving visibility.

[0009] Solutions to the Problems

[0010] The vehicle lamp according to the first aspect of the present invention includes: a plurality of light sources that emit excitation light; optical members provided for each of the light sources, which emit the excitation light from the light sources; a light generation unit provided for each of the optical members, which has a light-emitting layer that emits generated light by being irradiated with the excitation light emitted from the optical members; a lens member provided for each of the light-emitting layers, which is disposed on the front side with respect to the light-emitting layer and irradiates the generated light from the light-emitting layer in the front direction in the vehicle-mounted state; and a light source control unit that controls the power supplied to the plurality of light sources. The light generation unit is configured to be arranged in the left-right direction in the vehicle-mounted state, and the light generation unit disposed on the outer side of the vehicle is located more on the back side than the light generation unit disposed on the inner side of the vehicle.

[0011] The vehicle lamp according to the second aspect of the present invention is the vehicle lamp according to the first aspect, wherein the plurality of light generation units are arranged such that adjacent light generation units partially overlap each other in the left-right direction.

[0012] The vehicle lamp according to the third aspect of the present invention is the vehicle lamp according to the first aspect or the second aspect, wherein the light source control unit controls in such a manner that the greater the area of the overlapping portion of the light generation units with each other in the left-right direction, the greater the power supplied to the light sources.

[0013] In a fourth aspect of the present invention, there is provided a vehicle lamp according to any one of the first to third aspects described above, wherein the plurality of light generation units are arranged such that the light generation unit arranged on the outer side of the vehicle is inclined more toward the outer side of the vehicle than the light generation unit arranged on the inner side of the vehicle with respect to the front direction.

[0014] In a fifth aspect of the present invention, there is provided a vehicle lamp according to any one of the first to fourth aspects described above, wherein the light source control unit controls the power supplied to the light source such that the greater the angle at which the light generation unit is inclined toward the outer side of the vehicle with respect to the front direction, the greater the power supplied to the light source.

[0015] In a sixth aspect of the present invention, there is provided a vehicle lamp according to any one of the first to fifth aspects described above, wherein the optical component is constituted by a light guide component, the light source is arranged on the back side with respect to the light generation unit, emits the excitation light upward, the light guide component is arranged above the light source and the light generation unit, guides the excitation light from the light source to the front side and emits it downward toward the light generation unit, and the light generation unit is arranged such that the light emitting layer is formed in a flat plate shape and the normal direction of the light emitting layer is obliquely upward with respect to the front.

[0016] In a seventh aspect of the present invention, there is provided a vehicle lamp according to any one of the first to sixth aspects described above, wherein the optical component is constituted by a light guide component, and the light guide component has a first incident surface facing the light source in the vertical direction and a second incident surface surrounding the side of the light source.

[0017] In an eighth aspect of the present invention, there is provided a vehicle lamp according to any one of the first to seventh aspects described above, wherein the optical component is constituted by a light guide component, and the light guide component has a Fresnel lens portion provided on an incident surface where the excitation light from the light source is incident or an exit surface where the excitation light is emitted, and condenses the excitation light.

[0018] In a ninth aspect of the present invention, there is provided a vehicle lamp according to any one of the first to eighth aspects described above, wherein the optical component is constituted by a light guide component, and the light guide component has a prism portion that internally reflects the guided excitation light so as to diffuse it toward the light emitting layer side.

[0019] Advantageous Effects of the Invention

[0020] According to the present disclosure, a vehicle lamp capable of improving visibility can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is an exploded perspective view showing an example of the vehicle lamp according to the present embodiment.

[0022] Figure 2 It is a side cross-sectional view showing an example of a vehicle lamp.

[0023] Figure 3 It is a diagram showing an example of the arrangement of a plurality of light generation units.

[0024] Figure 4 It is a diagram showing an example of the arrangement of a plurality of light generation units.

[0025] Figure 5 It is a diagram showing an example of the arrangement of a plurality of light generation units.

[0026] Figure 6 It is a diagram showing an example of the arrangement of a plurality of light generation units.

[0027] Figure 7 It is a diagram showing an example of the light emission state of a vehicle lamp.

[0028] Figure 8 It is a diagram showing another example of the arrangement of a light source unit, a light guide member, and a light generation unit.

[0029] Figure 9 It is a diagram showing another example of the arrangement of a light source unit, a light guide member, and a light generation unit.

[0030] Figure 10 It is a diagram showing another example of the arrangement of a light source unit, a light guide member, and a light generation unit.

[0031] Figure 11 It is a diagram showing another example of the arrangement of a light source unit, a light guide member, and a light generation unit. Detailed Embodiments

[0032] Hereinafter, embodiments of the vehicle lamp of the present disclosure will be described based on the accompanying drawings. In addition, the present invention is not limited to this embodiment. Further, the constituent elements in the following embodiments include elements that can be easily replaced by those skilled in the art or substantially identical elements. In the following description, the front-back, up-down, and left-right directions are the directions in the vehicle-mounted state in which the vehicle lamp is mounted on the vehicle, and represent the directions when observing the traveling direction of the vehicle from the driver's seat. In addition, in the present embodiment, the up-down direction is parallel to the vertical direction, and the left-right direction is the horizontal direction. Further, regarding the front direction and the back direction, the direction in which light is emitted from the vehicle lamp is defined as the front direction, and the opposite direction of the front direction is defined as the back direction.

[0033] Figure 1 It is an exploded perspective view schematically showing an example of the vehicle lamp 100 of the present embodiment. Figure 2 It is a side cross-sectional view schematically showing an example of the vehicle lamp 100.Figure 1 and Figure 2 The vehicle lamp 100 shown in Figure 2 is, for example, a signal lamp such as a taillight. Therefore, in the present embodiment, the front direction is the rear direction (rear), and the back direction is the front direction (front). In addition, the left direction (left side) is the outside of the vehicle, and the right direction (right side) is the inside of the vehicle. The vehicle lamp 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.

[0034] The light source unit 10 includes a light source 11 and a support substrate 12. The light source 11 is, for example, a light source such as an LED or an organic EL. The same number of light sources 11 as the number of the light generation units 30 described later is provided. The light emitting surface 11a of the light source 11 faces upward. The light source 11 emits blue light from the light emitting surface 11a, for example, as excitation light. In addition, as the light source 11, it is not limited to a light source that emits blue light, and a light source that can irradiate 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.

[0035] The light guide member 20 is provided for each light source 11 and is disposed above the light source 11, respectively. The light guide member 20 is disposed inside the housing 50. The light guide member 20 is disposed so as to be hidden in the housing 50 in a manner that cannot be directly seen when observing the vehicle lamp 100 from the front side.

[0036] The light guide member 20 includes 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 exit surface 28.

[0037] The first incident surface 21 is disposed above the light source 11 and is disposed opposite to the light emitting surface 11a. The first incident surface 21 receives the light emitted upward from the light emitting surface 11a. The second incident surface 22 is disposed so as to surround the side of the light emitting surface 11a of the light source 11. The second incident surface 22 receives the light emitted from the light emitting surface 11a toward the side. The first reflection surface 23 internally reflects the light incident from the second incident surface 22.

[0038] The first light guide portion 24 extends obliquely upward toward the front side from the portion provided with the first incident surface 21 and the second incident surface 22. 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.

[0039] 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.

[0040] The second light guide part 26 extends from the first light guide part 24 toward the front side. The second light guide part 26 is arranged such that a part thereof protrudes toward the front side from the light generation part 30. The second light guide part 26 guides the excitation light that has undergone internal surface reflection by the second reflection surface 25 toward the front side.

[0041] The third reflection surface 27 is provided at the front side end of the second light guide part 26. The third reflection surface 27 performs internal surface reflection of the excitation light guided by the second light guide part 26 downward.

[0042] 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 that has undergone internal surface reflection by the third reflection surface 27 downward.

[0043] In this way, the light guide member 20 is arranged to protrude from the back side of the light generation part 30 around above 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.

[0044] 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 such 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 emitted from the emission surface 28 of the light guide member 20 easily reaches the light emitting layer 32 of the light generation part 30. The light generation part 30 has a holding member 31 and a light emitting layer 32.

[0045] The holding member 31 can transmit 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, a rectangular plate shape and can transmit the generated light emitted from the light emitting layer 32 described later. As such a holding member 31, for example, glass or the like is used.

[0046] The light emitting layer 32 is held on the first surface 31a of the holding member 31. The light emitting layer 32 is excited by being irradiated with the excitation light from the light source 11 and emits generated light. The light emitting layer 32 is held, for example, on the first surface 31a in the holding member 31. The light emitting layer 32 is formed, for example, in a shape corresponding to the shape of the taillight when viewed from the front. For example, the light emitting layer 32 may also be a structure having a predetermined pattern (not shown).

[0047] In the present embodiment, as the light-emitting layer 32, for example, an organic material in which about 5% of a guest material such as acetylacetone is doped into a host material such as polyvinylcarbazole is used. In this case, the light-emitting layer 32 emits red light as the generated light. The combination of the host material and the guest material is not limited to the above.

[0048] In the case where the light-emitting layer 32 is made of an organic material, for example, the light-emitting layer 32 can be formed by co-evaporating the host material and the guest material on the holding member 31. In addition, the light-emitting layer 32 can also be formed by a wet method such as a spin coating method or a spray method. In the case where an organic material is used as the light-emitting layer 32, the holding member 31 can be made of a substrate such as glass, for example.

[0049] In addition, as the light-emitting layer 32, an inorganic material such as CASN (CaAlSiN3:Eu) can also be used. In this case, the light-emitting layer 32 can be formed by coating a mixture of a transparent resin such as silicone and CASN on the holding member 31 and baking it. In addition, the light-emitting layer 32 can be formed by coating a mixture of an inorganic material such as a low-melting glass and CASN on the holding member 31 and baking it.

[0050] In the case where an inorganic material is used as the light-emitting layer 32, the holding member 31 can be made of a substrate such as glass, for example. In addition, as the light-emitting layer 32, other types of materials such as SCASN (Sr,Ca)AlSiN3:Eu can also be used, for example.

[0051] Figures 3 to 6 It is a diagram showing an example of the arrangement of a plurality of light generation units 30. Figures 3 to 6 Schematically shows the state of observing a plurality of light generation units 30 from above. In Figures 3 to 6 for example, three light generation units 30 are arranged in the left-right direction. In addition, the number of the light generation units 30 is not limited to three, and can also be two or four or more.

[0052] As Figures 3 to 6 shown, the plurality of light generation units 30 are arranged in a manner of being arranged in the left-right direction in the vehicle-mounted state. In addition, the plurality of light generation units 30 are arranged such that the light generation unit 30 disposed on the outer side of the vehicle is more on the back side than the light generation unit 30 disposed on the inner side of the vehicle. With this structure, an arrangement corresponding to the so-called inclined shape of the vehicle is achieved, so that a plurality of light generation units 30 can be arranged compactly, and a design corresponding to the shape of the vehicle can be achieved.

[0053] In Figure 3 and Figure 4 shown in the example, the plurality of light generation units 30 are arranged such that the normal direction R of the light-emitting layer 32 faces the front direction. In Figure 3In [description], a plurality of light generation units 30 are arranged in a state of being separated from each other in the left-right direction. With this arrangement, each light generation unit 30 can form an independent pattern in the light-emitting state. In addition, in Figure 4 In [description], a plurality of light generation units 30 are arranged in a state where adjacent light generation units 30 overlap with each other in part in the left-right direction. With this arrangement, it is possible to form a state where the light-emitting patterns of the plurality of light generation units 30 are connected to each other in the light-emitting state.

[0054] In Figure 5 and Figure 6 In the example shown, the plurality of light generation units 30 are arranged such that the normal direction R of the light-emitting layer 32 of the light generation unit 30 arranged on the outer side of the vehicle is more inclined toward the outer side of the vehicle than the normal direction R of the light-emitting layer 32 of the light generation unit 30 arranged on the inner side of the vehicle with respect to the front direction. With this arrangement, it is possible to ensure visibility when viewed from the inclined direction on the outer side of the vehicle with respect to the front in the light-emitting state. In Figure 5 In [description], a plurality of light generation units 30 are arranged in a state of being separated from each other in the left-right direction. With this structure, each light generation unit 30 can form an independent pattern in the light-emitting state. In addition, in Figure 6 In [description], a plurality of light generation units 30 are arranged in a state where they overlap with each other in part in the left-right direction. With this structure, it is possible to form a state where the light-emitting patterns of the plurality of light generation units 30 are connected to each other in the light-emitting state.

[0055] The lens member 40 is arranged in the front direction with respect to the light generation unit 30. The lens member 40 has an incident surface 41 and an exit surface 42. The incident surface 41 receives red light as the generated light from the light generation unit 30. The exit surface 42 emits the light incident on the incident surface 41 in the front direction. The lens member 40 transmits red light and absorbs light different from 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 or the like.

[0056] The housing 50 is formed of a resin material such as black, for example. The housing 50 supports or houses the above-described light source unit 10, light guide member 20, light generation unit 30, lens member 40, and light source control unit 60.

[0057] Next, the operation of the vehicle lamp 100 configured as described above will be described. By supplying power from the light source control unit 60 to the light source 11, the light source 11 can be turned on. By turning on the light source 11, a part of the excitation light Lb emitted from the light-emitting surface 11a irradiates the light-emitting layer 32 directly or through the holding member 31.

[0058] When the excitation light Lb is irradiated onto the light-emitting layer 32, the light-emitting layer 32 is excited to emit red light L. A part of the red light L generated by the light-emitting layer 32 is emitted rearward (in the front direction). In addition, when a reflective layer is formed on the second surface 31b of the holding member 31, a part of the red light L generated by the light-emitting layer 32 is emitted forward (in the back direction), and is reflected by the reflective layer and travels rearward. Therefore, the red light L generated in the light-emitting layer 32 is emitted as planar light in the front direction. The red light L is incident on the incident surface 41 of the lens member 40, and is emitted from the emission surface 42 in the front direction, and is irradiated, for example, as a pattern of a taillight.

[0059] The light source control unit 60 can control such that the larger the area of the overlapping portion of the light generation units 30 with each other in the left-right direction, the greater the power supplied to the light source 11. For example, compared with the Figure 3 configuration shown, Figure 4 the area of the overlapping portion of the light generation units 30 with each other in the left-right direction in the configuration shown is larger. In this case, the light source control unit 60 can supply power to the light source 11 having the structure of the configuration shown for the plurality of light generation units 30 Figure 4 in a manner greater than the power supplied to the light source 11 having the structure of the configuration shown for the plurality of light generation units 30 Figure 3 shown. Similarly, compared with the Figure 5 configuration shown, Figure 6 the area of the overlapping portion of the light generation units 30 with each other in the left-right direction in the configuration shown is larger. In this case, the light source control unit 60 can supply power to the light source 11 having the structure of the configuration shown for the plurality of light generation units 30 Figure 6 in a manner greater than the power supplied to the light source 11 having the structure of the configuration shown for the plurality of light generation units 30 Figure 5 shown.

[0060] In addition, the light source control unit 60 can control such that the larger the angle at which the light generation unit 30 is inclined in the direction toward the outside of the vehicle with respect to the front direction, the greater the power supplied to the light source 11. For example, compared with the Figure 3 configuration shown, Figure 5 the angle at which the light generation unit 30 is inclined in the direction toward the outside of the vehicle with respect to the front direction in the configuration shown is larger. In this case, the light source control unit 60 can supply power to the light source 11 having the structure of the configuration shown for the plurality of light generation units 30 Figure 5 in a manner greater than the power supplied to the light source 11 having the structure of the configuration shown for the plurality of light generation units 30 Figure 3 shown. Similarly, compared with the Figure 4 configuration shown, Figure 6The light generation unit 30 with the configuration shown is inclined at a greater angle in the direction facing the outside of the vehicle with respect to the front direction. In this case, the light source control unit 60 can supply power to the light source 11 of the structure with the configuration shown for the plurality of light generation units 30 Figure 6 in a manner that is greater than the power supplied to the light source 11 of the structure with the configuration shown for the plurality of light generation units 30 Figure 4 and control it.

[0061] Figure 7 FIG. is an example showing the light emission state of the vehicle lamp 100. Figure 7 In the example shown, the plurality of light generation units 30 of the vehicle lamp 100 partially overlap each other in the left - right direction, and the light generation unit 30 arranged on the outside of the vehicle is more inclined toward the outside of the vehicle than the light generation unit 30 arranged on the inside of the vehicle ( Figure 6 the configuration shown). This case will be described as an example.

[0062] As Figure 7 shown, in the configuration where the plurality of light generation units 30 partially overlap each other in the left - right direction, when the vehicle lamp 100 in the light emission state is observed from the front, the light emission patterns P of the plurality of light generation units 30 are connected to each other. Therefore, the appearance in the light emission state can be improved.

[0063] In addition, as Figure 7 shown, in the configuration where the normal direction R of the light emission layer 32 of the light generation unit 30 arranged on the outside of the vehicle is more inclined toward the outside of the vehicle than the normal direction R of the light emission layer 32 of the light generation unit 30 arranged on the inside of the vehicle with respect to the front direction, visibility can be ensured when observed from a direction corresponding to the inclined shape of the vehicle, for example, from a direction inclined toward the outside of the vehicle with respect to the front of the vehicle lamp 100. Therefore, the appearance in the light emission state can be improved.

[0064] Figures 8 to 11 FIG. is a diagram showing another example of the configuration of the light source unit 10, the light guide member 20, and the light generation unit 30. In Figure 8In the example shown, a light guide member 20A is disposed above the light source unit 10, and a light generation unit 30 is disposed 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 reflection surface 23A on the lower surface facing the light source unit 10. In addition, the light guide member 20A has an emission surface 28A on the upper surface facing the light generation unit 30. In this case, the excitation light Lb from the light source 11 enters from the first incident surface 21A and the second incident surface 22A. The excitation light Lb entering from the first incident surface 21A and the excitation light Lb entering from the second incident surface 22A and reflected by the first reflection surface 23A are emitted upward from the emission surface 28A. The excitation light Lb emitted from the emission surface 28A is irradiated onto the light generation unit 30. By irradiating the excitation light Lb onto the light generation unit 30, the light emitting layer 32 is excited to emit red light L, and the red light L is emitted in the front direction.

[0065] In Figure 9 In the example shown, a light guide member 20B is disposed above the light source unit 10, and a light generation unit 30 is disposed above the light guide member 20B. The light guide member 20B has an incident surface 21B on the 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 condenses the incident light. In addition, the light guide member 20B has an emission surface 28B on the upper surface facing the light generation unit 30. In this case, the excitation light Lb from the light source 11 enters from the Fresnel lens portion 22B of the incident surface 21B. The incident excitation light Lb is condensed by the Fresnel lens portion 22B and emitted upward from the emission surface 28B. The excitation light Lb emitted from the emission surface 28B is irradiated onto the light generation unit 30. By irradiating the excitation light Lb onto the light generation unit 30, the light emitting layer 32 is excited to emit red light L, and the red light L is emitted in the front direction.

[0066] In Figure 10 In the example shown, a light guide member 20C is disposed above the light source unit 10, and a light generation unit 30 is disposed above the light guide member 20C. The light guide member 20C has an incident surface 21C on the lower surface facing the light source unit 10. In addition, the light guide member 20C has an emission surface 28C on the upper surface facing the light generation unit 30. A Fresnel lens portion 22C is formed on the emission surface 28C. The Fresnel lens portion 22C condenses the emitted light. In this case, the excitation light Lb from the light source 11 enters from the incident surface 21C. The incident excitation light Lb is emitted upward from the emission surface 28C in a state of being condensed by the Fresnel lens portion 22C. The excitation light Lb emitted from the emission surface 28C is irradiated onto the light generation unit 30. By irradiating the excitation light Lb onto the light generation unit 30, the light emitting layer 32 is excited to emit red light L, and the red light L is emitted in the front direction.

[0067] InFigure 11 In the example shown, a light guide member 20D is disposed on the front side of the light source unit 10, and a light generation unit 30 is disposed above the light guide member 20D. The light source unit 10 is disposed with the light emitting surface 11a of the light source 11 facing the front. The light guide member 20D has a structure that extends from the incident surface 21D facing the light source unit 10 toward the front side. The light guide member 20D has a prism portion 22D on the lower surface 27D. The prism portion 22D reflects the excitation light Lb guided in the light guide member 20D upward in a diffused state. In addition, the light guide member 20D has an emission surface 28D on the upper surface facing the light generation unit 30. In this case, the excitation light Lb from the light source 11 enters from the incident surface 21D. The excitation light Lb incident from the incident surface 21D travels toward the front side inside the light guide member 20D and is reflected upward by the prism portion 22D. The excitation light Lb reflected by the prism portion 22D is emitted upward from the emission surface 28D. The excitation light Lb emitted upward from the emission surface 28D is irradiated onto the light generation unit 30. By irradiating the excitation light Lb onto the light generation unit 30, the light emitting layer 32 is excited to emit red light L, and the red light L is emitted toward the front direction.

[0068] As described above, the vehicle lamp 100 according to the present 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 has a light emitting layer 32 that generates light by being irradiated with the excitation light Lb emitted from the light guide member 20; a lens member 40 provided for each light emitting layer 32 that is disposed on the front side with respect to the light emitting layer 32 and irradiates the generated light from the light emitting layer 32 in the front direction in the vehicle-mounted state; and a light source control unit 60 that controls the power supplied to the plurality of light sources 11. The light generation units 30 are arranged in the left-right direction in the vehicle-mounted state, and the light generation unit 30 disposed on the outer side of the vehicle is located more on the rear side than the light generation unit 30 disposed on the inner side of the vehicle.

[0069] According to this structure, since the plurality of light generation units 30 are arranged in the left-right direction in the vehicle-mounted state and the light generation unit 30 disposed on the outer side of the vehicle is located more on the rear side than the light generation unit 30 disposed on the inner side of the vehicle, it is possible to achieve a configuration corresponding to the so-called inclined shape of the vehicle. As a result, visibility can be improved in a manner that can be clearly visible from the outside.

[0070] In the vehicle lamp 100 according to the present embodiment, the plurality of light generation units 30 are arranged such that adjacent light generation units 30 partially overlap each other in the left-right direction. According to this structure, it is possible to form a state in which the light emission patterns of the plurality of light generation units 30 are connected to each other in the light emission state.

[0071] In the vehicle lamp 100 of the present embodiment, the light source control unit 60 controls such that the larger the area of the overlapping portion of the light generation units 30 in the left-right direction, the greater the power supplied to the light source 11. According to this configuration, it is possible to suppress a decrease in light utilization efficiency due to the overlapping of the light generation units 30 in the left-right direction.

[0072] In the vehicle lamp 100 of the present embodiment, the plurality of light generation units 30 are arranged such that the light generation unit 30 arranged on the outer side of the vehicle is inclined more toward the outer side of the vehicle than the light generation unit 30 arranged on the inner side of the vehicle with respect to the front direction. According to this configuration, it is possible to ensure visibility when viewed from the inclined direction on the outer side of the vehicle with respect to the front in the light-emitting state.

[0073] In the vehicle lamp 100 of the present embodiment, the light source control unit 60 controls such that the greater the angle of inclination of the light generation unit 30 toward the outer side of the vehicle with respect to the front direction, the greater the power supplied to the light source 11. According to this configuration, it is possible to suppress a decrease in light utilization efficiency due to the inclination of the light generation unit 30 toward the outer side of the vehicle with respect to the front direction.

[0074] In the vehicle lamp 100 of the present embodiment, the light source 11 is arranged on the back side with respect to the light generation unit 30, emits the excitation light Lb upward, the light guide member 20 is arranged above the light source 11 and the light generation unit 30, guides the excitation light Lb from the light source 11 to the front side and emits it downward toward the light generation unit 30, and the light generation unit 30 is arranged such that the light emitting layer 32 is formed in a flat plate shape, and the normal direction R of the light emitting layer 32 is obliquely upward with respect to the front. According to this configuration, it is possible to compactly arrange the light source 11, the light guide member 20, and the light generation unit 30 in a limited space.

[0075] In the vehicle lamp 100 of the present embodiment, the light guide member 20 has a first incident surface 21 that faces the light source 11 in the up-down direction and a second incident surface 22 that surrounds the side of the light source 11. According to this configuration, it is possible to make the excitation light Lb from the light source 11 incident upward and the excitation light Lb from the light source 11 incident laterally enter the light guide member 20 respectively. Thereby, it is possible to improve the utilization efficiency of the excitation light Lb.

[0076] In the vehicle lamp 100 of the present embodiment, the light guide members 20B and 20C have Fresnel lens portions 22B and 22C, which are provided on the incident surface 21B for incident of the excitation light Lb from the light source 11 or the exit surface 28C for exit of the excitation light Lb, and condense the excitation light Lb. According to this configuration, it is possible to suppress the thickness of the light guide members 20B and 20C, and improve the utilization efficiency by condensing the excitation light Lb from the light source 11.

[0077] In the vehicle lamp 100 of the present 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 side. According to this structure, the excitation light Lb can be emitted with a uniform light amount by the prism portion 22D.

[0078] The technical scope of the present disclosure is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist of the present disclosure. For example, regarding the configurations of the light source unit 10, the light guide members 20 (including the light guide members 20A to 20D), and the light generation unit 30 shown in the above-described embodiment, they may also be configurations that are inverted in the vertical direction, respectively.

[0079] In addition, in the above-described embodiment, as the optical member, the case where the light guide members 20, 20A to 20D that guide and emit the excitation light are used is described as an example, but it is not limited to this structure. As long as the optical member is a structure that emits the excitation light from the light source 11 instead of the light guide members 20, 20A to 20D or a structure that emits the excitation light from the light source 11 in combination with the light guide members 20, 20A to 20D, it may also be other optical members such as a lens or a reflection member, or a combination thereof.

[0080] Symbol Explanation

[0081] L - red light, P - light emitting pattern, R - normal direction, EL - organic, Lb - excitation light, 10 - light source unit, 11 - light source, 11a - light 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 portion, 22D - prism portion, 23, 23A - first reflection surface, 24 - first light guide portion, 25 - second reflection surface, 26 - second light guide portion, 27 - third reflection surface, 28, 28A, 28B, 28C, 28D, 42 - exit surface, 30 - light generation unit, 31 - holding member, 31a - first surface, 31b - second surface, 32 - light emitting layer, 40 - lens member, 50 - housing, 60 - light source control unit, 100 - vehicle lamp.

Claims

1. A vehicle lamp, characterized in that, Comprising: A plurality of light sources that emit excitation light; Optical components, each provided for each of the light sources, that emit the excitation light from the light sources; A light generation unit, each provided for each of the optical components, having a light emitting layer that emits generated light by being irradiated with the excitation light emitted from the optical component; Lens components, each provided for each of the light emitting layers, arranged on the front side with respect to the light emitting layer, and irradiating the generated light from the light emitting layer in the front direction in the vehicle-mounted state; and A light source control unit that controls the power supplied to the plurality of light sources, The light generation unit is configured to be arranged in the left-right direction in the vehicle-mounted state, and the light generation unit arranged on the outer side of the vehicle is located more on the back side than the light generation unit arranged on the inner side of the vehicle.

2. The vehicle lamp according to claim 1, wherein: The plurality of light generation units are arranged such that adjacent light generation units partially overlap each other in the left-right direction.

3. The vehicle lamp according to claim 2, wherein: The light source control unit controls in such a manner that the greater the area of the overlapping portion of the light generation units with each other in the left-right direction, the greater the power supplied to the light source.

4. The vehicle lamp according to claim 1, wherein: The plurality of light generation units are arranged such that the light generation unit arranged on the outer side of the vehicle is inclined more in the direction outside the vehicle than the light generation unit arranged on the inner side of the vehicle with respect to the front direction.

5. The vehicle lamp according to claim 4, wherein: The light source control unit controls in such a manner that the greater the angle of inclination of the light generation unit in the direction outside the vehicle with respect to the front direction, the greater the power supplied to the light source.

6. The vehicle lamp according to claim 1, wherein: The optical component is constituted by a light guide component, The light source is arranged on the back side with respect to the light generation unit and emits the excitation light upward, The light guide component is arranged above the light source and the light generation unit, guides the excitation light from the light source to the front side, and emits it downward toward the light generation unit, The light generation unit is configured such that the light emitting layer is formed in a flat plate shape, and the normal direction of the light emitting layer is obliquely upward with respect to the front.

7. The vehicle lamp according to claim 1, wherein: The optical component is constituted by a light guide component, The light guide component has a first incident surface that faces the light source in the up-down direction and a second incident surface that surrounds the side of the light source.

8. The vehicle lamp according to claim 1, wherein: The optical component is constituted by a light guide component, The light guide component has a Fresnel lens portion that is provided on the incident surface where the excitation light from the light source is incident or on the exit surface where the excitation light is emitted, and condenses the excitation light.

9. The vehicle lamp according to claim 1, wherein: The optical component is constituted by a light guide component, 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 side.

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