Vehicle lamp and substrate for vehicle lamp

Abstract

To provide a vehicular lighting fixture and a substrate for the vehicular lighting fixture capable of enhancing a degree of freedom of selection of the substrate for holding a light-emitting body.SOLUTION: The light emitting layer includes a light emitting body configured to emit the generation light, and an adhesion material configured to fix the light emitting body to the surface of the holding substrate, and a fixing temperature of the adhesion material for fixing the light emitting body to the holding substrate is lower than a heat resistant temperature of the holding substrate.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a vehicle lamp and a substrate for a vehicle lamp. [Background technology]

[0002] A vehicle lamp is known that includes an excitation light source that emits excitation light, a substrate that holds a light-emitting body that emits light when irradiated with the excitation light, and a lamp lens that directs the light emitted from the light-emitting body to the front of the vehicle (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-106200 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, a mixture of a light emitter and a solvent is applied to a substrate, and the substrate is sintered to evaporate the solvent, thereby holding the light emitter on the substrate. In this case, the substrate that holds the light emitter is limited to a substrate that has heat resistance to the sintering temperature.

[0005] The present invention has been made in view of the above, and aims to provide a vehicle lamp and a substrate for a vehicle lamp that enable greater freedom in selecting a substrate that holds an illuminant. [Means for solving the problem]

[0006] The vehicle lamp according to the present invention comprises an excitation light source that emits excitation light, a holding substrate, and a light generating unit having a light emitting layer formed on the surface of the holding substrate that generates and emits generated light upon irradiation with the excitation light, the light emitting layer including a light emitting body that emits the generated light, and an adhesive that fixes the light emitting body to the surface of the holding substrate, and the adhesive has a fixing temperature for fixing the light emitting body to the holding substrate that is lower than the heat resistance temperature of the holding substrate.

[0007] The substrate for a vehicle lamp according to the present invention is a substrate for a vehicle lamp mounted on a vehicle lamp, and comprises a holding substrate and a light generating section having a light emitting layer formed on the surface of the holding substrate and generating and emitting generated light when irradiated with excitation light, the light emitting layer including a light emitting body that emits the generated light, and an adhesive that fixes the light emitting body to the surface of the holding substrate, and the adhesive has a fixing temperature for fixing the light emitting body to the holding substrate that is lower than the heat resistance temperature of the holding substrate. [Effects of the Invention]

[0008] According to the present invention, it is possible to increase the degree of freedom in selecting a substrate for holding a light emitter. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram showing an example of a vehicle lamp according to this embodiment. [Figure 2] FIG. 2 is a flowchart showing an example of a method for manufacturing a light generating unit. [Figure 3] FIG. 3 is a diagram showing an example of a manufacturing process of the light generating unit. [Figure 4] FIG. 4 is a diagram showing an example of a manufacturing process of the light generating unit. [Figure 5] FIG. 5 is a diagram showing an example of a manufacturing process of the light generating unit. [Figure 6] FIG. 6 is a diagram showing an example of the operation of the vehicle lamp according to this embodiment. [Figure 7] FIG. 7 is a diagram showing another example of a vehicle lamp. [Figure 8]FIG. 8 is a diagram showing another example of a vehicle lamp. [Figure 9] FIG. 9 is a diagram showing another example of a vehicle lamp. [Figure 10] FIG. 10 is a diagram showing another example of a vehicle lamp. [Figure 11] FIG. 11 is a diagram showing another example of a vehicle lamp. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of a vehicle lamp and a substrate for a vehicle lamp according to the present disclosure will be described with reference to the drawings. Note that the present invention is not limited to these embodiments. Furthermore, the components in the following embodiments include those that are easily replaceable by those skilled in the art, or those that are substantially identical. In the following description, the front-rear, up-down, and left-right directions refer to directions when the vehicle lamp is mounted on a vehicle and viewed from the driver's seat in the direction of vehicle travel. Note that in this embodiment, the up-down direction is parallel to the vertical direction, and the left-right direction is horizontal. Furthermore, with regard to the front direction and rear direction, the direction in which light is emitted from the vehicle lamp is defined as the front direction, and the direction opposite to the front direction is defined as the rear direction.

[0011] FIG. 1 is a diagram showing an example of a vehicular lamp 100 according to this embodiment. The vehicular lamp 100 shown in FIG. 1 is, for example, a signal lamp such as a tail lamp. In this embodiment, the front direction is the rear direction (rear), and the back direction is the front direction (forward). Furthermore, the left direction (left side) is the outside of the vehicle, and the right direction (right side) is the inside of the vehicle. As shown in FIG. 1, the vehicular lamp 100 includes an excitation light source 10, a light generating unit 20, a lamp lens 30, and a housing 40. Note that an optical system such as a reflector may be disposed between the excitation light source 10 and the light generating unit 20.

[0012] The excitation light source 10 has a light source such as an LED or an organic EL. The excitation light source 10 emits, for example, blue light as excitation light. Note that the excitation light source 10 is not limited to a light source that emits blue light, and a light source that can irradiate light (such as violet light or ultraviolet light) with a shorter wavelength than the wavelength of light generated in the light generation unit 20, which will be described later, can be used. The excitation light source 10 is mounted on a substrate 11. The substrate 11 is fixed to the housing 40 via a heat sink 12.

[0013] The light generating unit 20 has a holding substrate 21 and a light emitting layer 22. In this embodiment, the light generating unit 20 constitutes a substrate 50 for a vehicle lamp. The holding substrate 21 is capable of transmitting excitation light emitted from the light source 11. By transmitting the excitation light, the holding substrate 21 guides the excitation light inside the holding substrate 21 and can irradiate the entire surface of the light emitting layer 22 described below.

[0014] In this embodiment, the holding substrate 21 is, for example, a rectangular plate and is capable of transmitting light generated by the light-emitting layer 22 (described later). Examples of such a holding substrate 21 include light-transmitting resin materials such as ABS (Acrylonitrile, Butadiene, Styrene), PC (Polycarbonate), PMMA (Polymethyl Methacrylate), PET (Polyethylene Terephthalate), and PVC (Polyvinyl Chloride). These resin materials may also be non-light-transmitting materials. When quantum dots (described later) are used as the light-emitting bodies 23, a transparent flexible sheet can be used as the holding substrate 21. The flexible sheet is not limited to quantum dots, and can also be used when other light-emitting bodies are used.

[0015] The holding substrate 21 has a curved first surface 21a. In this case, the light-emitting layer 22, which will be described later, can be formed in a curved shape along the first surface 21a. The first surface 21a of the holding substrate 21 may be flat. The holding substrate 21 may have a reflecting member 28 disposed on a second surface 21b on the back side of the first surface 21a. In this case, the excitation light and generated light that pass through the holding substrate 21 and the light-emitting layer 22 are reflected by the reflecting member 28, thereby enabling efficient use of light.

[0016] The light-emitting layer 22 is held on the first surface 21a of the holding substrate 21. The light-emitting layer 22 is disposed on the curved portion 21b of the holding substrate 21. The light-emitting layer 22 is excited by irradiation with excitation light from the excitation light source 10, and emits generated light. The light-emitting layer 22 may have a predetermined pattern. As shown in the enlarged portion of FIG. 1 , the light-emitting layer 22 includes a light-emitting body 23 and an adhesive 24.

[0017] The light-emitting body 23 is, for example, in the form of particles. The light-emitting body 23 can be an organic material, a fluorescent material, or the like. The light-emitting body 23 can be an organic material in which a host material such as polyvinylcarbazole is doped with a guest material such as acetylacetone at about 5%. In this case, the light-emitting layer 22 emits red light as generated light. The combination of the host material and the guest material is not limited to the above.

[0018] Note that semiconductor crystals with a diameter of about 2 nm to 10 nm, such as quantum dots, may be used as the light emitter 23. In this case, the size of the light emitter 23 itself is smaller than the above-mentioned organic materials, phosphors, etc., so the light emitter 23 can be made to look transparent. Furthermore, when quantum dots are used as the light emitter 23, the manufacturing cost can be reduced compared to the above-mentioned organic materials, phosphors, etc.

[0019] The adhesive 24 fixes the light emitter 23 to the first surface 21a of the holding substrate 21. The adhesive 24 has a fixing temperature for fixing the light emitter 23 to the holding substrate 21 that is lower than the heat-resistant temperature of the holding substrate 21. In this embodiment, the heat-resistant temperature of the holding substrate 21 is, for example, 120°C or lower.

[0020] The adhesive 24 is preferably configured to be able to transmit the excitation light and the generated light. For example, the adhesive 24 preferably has a light transmittance of 0.8 or more for light having a wavelength in the range of 350 nm to 800 nm.

[0021] The adhesive 24 preferably has a bonding temperature lower than the heat-resistant temperature of the light-emitting body 23. The bonding temperature of the adhesive 24 is preferably, for example, 80°C or lower. The heat-resistant temperature of the light-emitting body 23 is 100°C or lower when the light-emitting body 23 is an organic material, 500°C or higher when the light-emitting body 23 is a phosphor, and 100°C or lower when the light-emitting body 23 is a quantum dot.

[0022] The time required for the adhesive 24 to adhere to the holding substrate 21 is preferably 30 minutes or more and 60 minutes or less in an environment of 25°C, for example. With this configuration, the light emitter 23 can be adhered to the holding substrate 21 by natural drying without sintering or the like. When adhering the light emitter 23 to the holding substrate, the light emitter 23 may be dried by heating at a temperature lower than the heat resistance temperature of the light emitter 23. The adhesive 24 is preferably miscible with a predetermined solvent such as an organic solvent or water. Examples of such an adhesive 24 include acrylic lacquer. The adhesive 24 is not limited to the above.

[0023] In the light-emitting layer 22, the ratio of the adhesive 24 to the light-emitting body 23 is preferably, for example, 5% or more and 95% or less by weight. When the ratio of the light-emitting body 23 in the light-emitting layer 22 increases relatively, the light-emitting efficiency increases relatively, but the adhesive strength to the holding substrate 21 decreases relatively. Therefore, by appropriately specifying the ratio of the light-emitting body 23 to the adhesive 24, it is possible to appropriately set the balance between the light-emitting efficiency and the adhesive strength. Note that, for example, by using an adhesive 24 that has high adhesive strength to the holding substrate 21, it is possible to ensure high adhesive strength while relatively increasing the ratio of the light-emitting body 23.

[0024] The lamp lens 30 is disposed in a front direction relative to the light generating unit 20. The lamp lens 30 has an incident surface 31 and an exit surface 32. The incident surface 31 receives the red light generated by the light generating unit 20. The exit surface 32 emits the light that has entered the incident surface 31 in a front direction. The lamp lens 30 transmits the red light and absorbs light different from the red light. Therefore, the excitation light component contained in external light is absorbed by the lamp lens 30. The lamp lens 30 is held by, for example, a housing 40. The lamp lens 30 and the housing 40 form a lamp chamber R.

[0025] Next, a method for manufacturing the light generating unit 20 in the vehicle lamp 100 configured as described above will be described. Fig. 2 is a flowchart showing an example of a method for manufacturing the light generating unit 20. Figs. 3 to 5 are diagrams showing an example of a manufacturing process for the light generating unit 20.

[0026] First, a solution for forming the light-emitting layer 22 is prepared (step S10). In step S10, as shown in FIG. 3, a solution 26 is prepared by mixing a light-emitting body 23, an adhesive 24, and a solvent 25. For example, an organic solvent can be used as the solvent 25. In this case, the viscosity of the solution 26 can be adjusted by adjusting the weight ratio of the adhesive 24 to the solvent 25. The weight ratio of the adhesive 24 to the solvent 25 can be, for example, 1:1, but is not limited to this ratio.

[0027] Next, the generated solution 26 is applied to the holding substrate 21 (step S20). In step S20, the solution 26 is applied to the first surface 21a of the holding substrate 21 to form a coating layer 27, as shown in FIG.

[0028] Next, the formed coating layer 27 is dried (step S30). In step S30, as shown in Fig. 5, the solvent 25 in the coating layer 27 is evaporated by natural drying at room temperature (for example, about 25°C). By evaporating the solvent 25 in the coating layer 27, the solvent 25 is removed from the coating layer 27, and the light-emitting body 23 and the adhesive material 24 are fixed. The adhesive material 24 fixes the light-emitting body 23 to the first surface 21a of the holding substrate 21.

[0029] Next, an operation of the vehicular lamp 100 configured as described above will be described. Fig. 6 is a diagram showing an example of the operation of the vehicular lamp 100 according to this embodiment. When the excitation light source 10 is turned on, a portion of the excitation light Lb emitted from the excitation light source 10 is irradiated onto the light-emitting layer 22 directly or after passing through the holding substrate 21.

[0030] When excitation light is irradiated onto the light-emitting layer 22, the light-emitting layer 22 is excited and emits, for example, red generated light Lr. A portion of the generated light Lr generated in the light-emitting layer 22 is emitted backward (toward the front). Furthermore, a portion of the forward-facing generated light Lr and a portion of the excitation light are reflected by the reflecting member 28 and emitted backward. The generated light Lr generated in the light-emitting layer 22 is emitted forward as planar light. A portion of the excitation light Lb and the generated light Lr reach the lamp lens 30. The generated light Lr is incident on the incident surface 31 of the lamp lens 30 and is emitted forward from the exit surface 32, and is irradiated as, for example, a tail lamp pattern. Note that a portion of the excitation light Lb reaches the lamp lens 30. In this embodiment, the lamp lens 30 transmits red light and absorbs light other than red light, so that the excitation light Lb that reaches the lamp lens 30 is blocked.

[0031] As described above, the vehicle lamp 100 of this embodiment includes an excitation light source 10 that emits excitation light, a holding substrate 21, and a light generating unit 20 that has a light emitting layer 22 formed on a first surface 21a of the holding substrate 21 and that generates and emits generated light upon irradiation with excitation light, the light emitting layer 22 including a light emitting body 23 that emits the generated light, and an adhesive 24 that fixes the light emitting body 23 to the first surface 21a of the holding substrate 21, and the adhesive 24 has a fixing temperature for fixing the light emitting body 23 to the holding substrate 21 that is lower than the heat resistance temperature of the holding substrate 21.

[0032] According to this configuration, the light-emitting layer 22 includes the light-emitting body 23 and the adhesive 24, and the bonding temperature of the adhesive 24 is lower than the heat-resistant temperature of the holding substrate 21, so that the light-emitting body 23 can be fixed to the holding substrate 21 by the adhesive 24 without exceeding the heat-resistant temperature of the holding substrate 21. This allows for greater freedom in selecting the holding substrate 21 that holds the light-emitting body 23.

[0033] In the vehicle lamp 100 according to this embodiment, the holding substrate 21 has a curved first surface 21a, and the light emitting layer 22 is disposed on the curved portion 21b of the holding substrate 21.

[0034] According to this configuration, the light-emitting layer 22 can be formed not only by screen printing but also by pad printing, etc. This makes the light-emitting layer 22 suitable for use when it is desired to form a three-dimensional pattern using the three-dimensional shape of an inner lens or housing inside a lamp chamber, for example.

[0035] In the vehicle lamp 100 according to this embodiment, the adhesive material 24 is capable of transmitting the excitation light and the generated light.

[0036] According to this configuration, the adhesive 24 transmits the excitation light and the generated light, thereby improving the light utilization efficiency.

[0037] In the vehicle lamp 100 according to this embodiment, the ratio of the adhesive 24 to the light emitter 23 is, for example, 5% or more and 95% or less in weight ratio.

[0038] According to this configuration, by appropriately defining the ratio between the light emitting body 23 and the adhesive 24, it is possible to appropriately set the balance between the light emitting efficiency and the adhesive strength.

[0039] In the vehicle lamp 100 according to this embodiment, the adhesive material 24 has a fixing temperature that is lower than the heat-resistant temperature of the light emitter 23 .

[0040] According to this configuration, the bonding temperature of the adhesive 24 is lower than the heat-resistant temperature of the light-emitting body 23, so that the light-emitting body 23 can be bonded to the holding substrate 21 by the adhesive 24 without exceeding the heat-resistant temperature of the light-emitting body 23. This allows for greater freedom in selecting the light-emitting body 23. For example, a material with a low heat-resistant temperature, such as quantum dots, can be suitably used as the light-emitting body 23.

[0041] In the vehicle lamp 100 according to this embodiment, the holding substrate 21 is a lens that transmits the generated light.

[0042] According to this configuration, the light-emitting layer 22 can be suitably used when it is desired to form a pattern using an inner lens inside the lamp chamber.

[0043] The technical scope of the present invention is not limited to the above-described embodiments, and appropriate modifications can be made without departing from the spirit of the present invention.

[0044] For example, in the above embodiment, an example was given in which the holding substrate 21 has a first surface 21a and a second surface 21b, a reflective member 28 is arranged on the second surface 21b, and the excitation light source 10 is arranged on the first surface 21a side, but this configuration is not limited to this.

[0045] FIG. 7 is a diagram showing another example of a vehicle lamp. In a vehicle lamp 100A shown in FIG. 7, a light generating unit 20A has a holding substrate 21 and a light emitting layer 22. In this embodiment, the light generating unit 20A constitutes a substrate 50A for the vehicle lamp. The holding substrate 21 transmits the excitation light and the generated light. The excitation light source 10 is disposed on a second surface 21b of the holding substrate 21, opposite to a first surface 21a on which the light emitting layer 22 is formed. The excitation light emitted from the excitation light source 10 transmits through the holding substrate 21 from the second surface 21b side and reaches the light emitting layer 22, generating generated light. The generated light is emitted from a lamp lens 30 toward the front of the vehicle. This configuration enables the entire vehicle lamp 100A to be simplified and compact.

[0046] FIG. 8 is a diagram showing another example of a vehicle lamp. In a vehicle lamp 100B shown in FIG. 8, a light generating unit 20B has a holding substrate 21B and a light-emitting layer 22. In this embodiment, the light generating unit 20B constitutes a substrate 50B for a vehicle lamp. The holding substrate 21B is formed using a material that does not transmit the excitation light and the generated light. The holding substrate 21B has a light-emitting layer 22 on a first surface 21a. The first surface 21a functions as a reflective surface that reflects the excitation light and the generated light. The excitation light source 10 is disposed on the first surface 21a side of the holding substrate 21B. The excitation light emitted from the excitation light source 10 reaches the light-emitting layer 22 from the first surface 21a side of the holding substrate 21B, generating generated light. A portion of the excitation light and the generated light is reflected by the first surface 21a and reaches the lamp lens 30. The excitation light is blocked by the lamp lens 30, and the generated light is transmitted and emitted toward the front of the vehicle. This configuration allows for a wider range of design possibilities for the vehicle lamp 100B.

[0047] FIG. 9 is a diagram illustrating another example of a vehicle lamp. In a vehicle lamp 100C illustrated in FIG. 9, a light generating unit 20C includes a holding substrate 21 and a light-emitting layer 22. In this embodiment, the light generating unit 20C constitutes a substrate 50C for a vehicle lamp. The holding substrate 21 includes a reflecting member 28 on a first surface 21a as a light-reflecting layer that reflects the excitation light and the generated light. The light-emitting layer 22 is disposed on the reflecting member 28. The excitation light source 10 is disposed on the first surface 21a side of the holding substrate 21. The excitation light emitted from the excitation light source 10 reaches the light-emitting layer 22 on the reflecting member 28 of the holding substrate 21, generating generated light. A portion of the excitation light and the generated light is reflected by the reflecting member 28 and reaches the lamp lens 30. The lamp lens 30 blocks the excitation light, while the generated light is transmitted and emitted toward the front of the vehicle. This configuration broadens the design possibilities of the vehicle lamp 100C.

[0048] FIG. 10 is a diagram showing another example of a vehicle lamp. In a vehicle lamp 100D shown in FIG. 10, a light generating unit 20D is composed of a lamp lens 30 and a light emitting layer 22. In this embodiment, the light generating unit 20D constitutes a substrate 50D for the vehicle lamp. The light emitting layer 22 is provided on, for example, the incident surface 31 of the lamp lens 30. That is, in the light generating unit 20D, the lamp lens 30 functions as a holding substrate. This configuration broadens the design possibilities for the vehicle lamp 100D, and enables the entire vehicle lamp 100D to be simplified and compact.

[0049] FIG. 11 is a diagram showing another example of a vehicle lamp. In a vehicle lamp 100D shown in FIG. 11, a light generating unit 20E has a holding substrate 21E and a light-emitting layer 22. In this embodiment, the light generating unit 20E constitutes a substrate 50E for a vehicle lamp. The holding substrate 21E transmits excitation light and generated light. The light-emitting layer 22 is disposed on a first surface 21a of the holding substrate 21E. The second surface 21b of the holding substrate 21E is attached to, for example, the incident surface 31 of the lamp lens 30. The holding substrate 21E may be sheet-shaped. The excitation light source 10 is disposed on the back side of the light generating unit 20E. In this configuration, excitation light emitted from the excitation light source 10 reaches the light-emitting layer 22 on the first surface 21a of the holding substrate 21, generating generated light. The generated light passes through the holding substrate 21 and is emitted from the lamp lens 30 toward the front of the vehicle. This configuration allows for a wider range of design possibilities for the vehicle lamp 100E, and makes it possible to simplify and miniaturize the entire vehicle lamp 100E.

[0050] As described above, in this embodiment, there is provided a substrate for a vehicle lamp to be mounted in a vehicle lamp, the substrate comprising: a holding substrate 21, 21B, 21E (which may be a lamp lens 30); and a light generating unit 20, 20A, 20B, 20C, 20D, 20E having a light emitting layer 22 formed on the surface of the holding substrate 21, 21B, 21E that generates and emits generated light upon irradiation with excitation light, the light emitting layer 22 including a light emitting body 23 that emits the generated light, and an adhesive 24 that fixes the light emitting body 23 to the first surface 21a of the holding substrate 21, 21B, 21E, the adhesive 24 having a fixing temperature for fixing the light emitting body 23 to the holding substrate 21, 21B, 21E that is lower than the heat resistance temperature of the holding substrate 21, 21B, 21E.

[0051] According to this configuration, the light-emitting layer 22 includes the light-emitting body 23 and the adhesive 24, and the bonding temperature of the adhesive 24 is lower than the heat-resistant temperature of the holding substrate 21, so that the light-emitting body 23 can be bonded to the holding substrate 21 by the adhesive 24 without exceeding the heat-resistant temperature of the holding substrate 21. This makes it possible to provide the substrates 50, 50A, 50B, 50C, 50D, and 50E for vehicle lamps that enable greater freedom in selecting the holding substrate 21 that holds the light-emitting body 23. [Explanation of symbols]

[0052] P...pattern, Lb...excitation light, Lr...generated light, R...lamp chamber, 10...excitation light source, 11...light source, 12...heat sink, 20, 20A, 20B, 20C, 20D, 20E...light generating portion, 21, 21B, 21E...holding substrate, 21a...first surface, 21b...curved portion, 22...light emitting layer, 23...light emitter, 24...adhesive, 25...solvent, 26...solution, 27...coating layer, 28...reflective member, 30...lamp lens, 31...incident surface, 32...exit surface, 40...housing, 50, 50A, 50B, 50C, 50D, 50E...substrate for vehicle lamp, 100, 100A, 100B, 100C, 100D, 100E...vehicle lamp

Claims

1. an excitation light source that emits excitation light; a holding substrate; and a light generating unit having a light emitting layer formed on a surface of the holding substrate, the light emitting layer generating and emitting generated light upon irradiation with the excitation light; Equipped with the light-emitting layer includes a light-emitting body that emits the generated light and an adhesive that fixes the light-emitting body to the surface of the holding substrate; The adhesive has a temperature at which the light emitter is fixed to the holding substrate that is lower than the heat-resistant temperature of the holding substrate. Vehicle lighting fixtures.

2. the surface of the holding substrate has a curved shape; The light-emitting layer is disposed on the curved portion of the supporting substrate.

2. A vehicle lamp according to claim 1.

3. The adhesive material is capable of transmitting the excitation light and the generated light.

2. A vehicle lamp according to claim 1.

4. In the light-emitting layer, the ratio of the adhesive to the light-emitting body is 5% or more and 95% or less by weight.

2. A vehicle lamp according to claim 1.

5. The adhesive has a bonding temperature lower than the heat-resistant temperature of the light-emitting body.

2. A vehicle lamp according to claim 1.

6. The holding substrate is a lens that transmits the generated light.

2. A vehicle lamp according to claim 1.

7. The holding substrate transmits the excitation light and the generated light.

2. A vehicle lamp according to claim 1.

8. the holding substrate has a first surface on which the light generation unit is formed and a second surface opposite to the first surface on which a light reflecting layer that reflects the excitation light and the generated light is formed, The excitation light source is disposed on the first surface side of the holding substrate.

2. A vehicle lamp according to claim 1.

9. the holding substrate has a reflective surface that reflects the excitation light and the generated light, The excitation light source is disposed on the reflecting surface side of the holding substrate.

2. A vehicle lamp according to claim 1.

10. the holding substrate has a light reflecting layer that reflects the excitation light and the generated light, the light-emitting layer is disposed on the light-reflecting layer; The excitation light source is disposed on the light reflecting layer of the holding substrate.

2. A vehicle lamp according to claim 1.

11. The lamp further includes a lamp lens that emits the generated light emitted from the light-emitting layer to a front side when the lamp is mounted on a vehicle. the holding substrate is the lamp lens, The light-emitting layer is provided on the lamp lens.

2. A vehicle lamp according to claim 1.

12. The lamp further includes a lamp lens that emits the generated light emitted from the light-emitting layer to a front side when the lamp is mounted on a vehicle. The holding substrate is attached to the lamp lens.

2. A vehicle lamp according to claim 1.

13. A substrate for a vehicle lamp to be mounted in a vehicle lamp, A holding substrate; a light generating section having a light emitting layer formed on the surface of the holding substrate, the light emitting layer generating and emitting generated light upon irradiation with excitation light; Equipped with the light-emitting layer includes a light-emitting body that emits the generated light and an adhesive that fixes the light-emitting body to the surface of the holding substrate; The adhesive has a temperature at which the light emitter is fixed to the holding substrate that is lower than the heat-resistant temperature of the holding substrate. A circuit board for vehicle lighting fixtures.

Images