Vehicle lamp

Abstract

The invention provides a vehicle lamp capable of realizing good appearance. The emission surface of the optical member faces the light-emitting layer, which is the light-emitting surface of the conversion member, by means of a holding member (an inner case (5) and a support section (6)), and the excitation light source (4) faces the incidence surface of the optical member. In addition, the light-emitting device of the vehicle lamp is formed in a shape in which the emission surface of the optical member is based on the shape of the light-emitting layer, which is the light-emitting surface, and the excitation light source is disposed at a position based on the shape of the incidence surface of the optical member.

Description

Technical Field

[0001] The present invention relates to a vehicle lamp which provides a good appearance by utilizing inorganic or organic fluorescent materials and photoluminescence. Background Art

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

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: International Publication No. 2019 / 245030 Summary of the invention

[0006] Technical issues

[0007] A vehicle lamp that utilizes the principle of the above-mentioned vehicle lamp and functions as a vehicle lamp and realizes a more realistic and good appearance has not yet been developed.

[0008] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle lamp having an excellent appearance.

[0009] Technical Solution

[0010] One aspect of the vehicle lamp of the present invention is characterized in that it comprises: a lamp housing and a lamp lens, which form a space; an excitation light source, which is arranged in the space and emits blue excitation light; an optical component, which is arranged in the space and is arranged corresponding to the excitation light source so that the excitation light emitted from the excitation light source is incident and parallel light or light close to parallel light is emitted; and a light conversion component, which is arranged in the space, is set at a position to receive the light from the optical component, and is formed into a predetermined shape based on the light-emitting pattern P, and the lamp lens is a red lens, or a separate red outer lens is provided on the outside of the lamp lens.

[0011] Effects of the Invention

[0012] The vehicle lamp of the present invention can provide a vehicle lamp having excellent appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figures 1A to 1C 1 is a diagram showing the entire vehicle lamp 110 of the present invention.

[0014] Figure 2 It is a longitudinal sectional view of the vehicle lamp 100 .

[0015] Figure 3This is a diagram for explaining the mounting of the light conversion member 34 .

[0016] Figure 4A and Figure 4B It is a diagram for explaining the light conversion unit 3 .

[0017] Figure 5 is a cross-sectional view of the optical component 33 .

[0018] Figure 6 is a perspective view showing a light conversion component.

[0019] Fig. 7A and Figure 7B It is a diagram for explaining the arrangement of optical components and an excitation light source.

[0020] Figure 8 It is a diagram for explaining the positional relationship between the optical component and the light conversion component.

[0021] 9A to 9C It is a cross-sectional view for explaining another embodiment of the optical component 33 . DETAILED DESCRIPTION

[0022] The following is a detailed description of the implementation (example) of the vehicle lamp of the present invention based on the accompanying drawings. In addition, the present invention is not limited to this implementation. In addition, the constituent elements in the following implementation include elements that can be easily replaced by those skilled in the art or substantially the same elements. In the following description, the front and back, up and down, left and right directions are directions when the vehicle lamp is mounted on the vehicle, and the directions when observed from the driver's seat along the travel direction of the vehicle are shown. In addition, in the present embodiment, the up and down direction is parallel to the vertical direction, and the left and right direction is the horizontal direction. In addition, for the front direction and the back direction, the direction of light emitted from the vehicle lamp is the front direction, and the opposite direction of the front direction is the back direction.

[0023] (Description of Vehicle Lamp 100)

[0024] In this example, the vehicle lamp 100 is a rear combination lamp mounted on both left and right sides of the rear portion of a vehicle (not shown). Therefore, in the first embodiment, the front direction is the rear direction (vehicle rear) and the back direction is the front direction (vehicle front). Figures 1A to 1C 2 is a diagram illustrating the entire rear combination lamp. Figure 1A 1 is a diagram showing the interior of a housing 1 provided in a vehicle. A tail light unit 101 and a turn signal light unit 102 are accommodated in the housing 1 . Figure 1B 1 is a diagram showing the light conversion unit 3 built into the tail light portion 101 . Figure 1C 1 is a diagram showing a state where the outer lens 2 is fitted into the housing 1 . Figure 2: is a cross-sectional view of the vehicle lamp 100. A tail light section 101 and a turn signal section 102 are provided in the housing 1, which are divided by the inner housing 5. The embodiment of the present invention will be described below by taking the structure of the tail light section 101 as an example. The tail light section 101 is provided with: a light source section 30, which is provided on the lower side of the top plate surface of the inner housing 5; a light conversion component 34, which receives light from the light source section 30, performs light conversion, and emits light in the front direction; an inner lens 40, which receives light from the light conversion component 34, and emits light to the outside of the vehicle via the outer lens 2; and a support section 6, which supports the light conversion component 33. The light source section 30 irradiates the blue light emitted from the excitation light source 4 as parallel light or nearly parallel light to the light conversion component 34. The light conversion component 34 converts the blue light from the excitation light source 4 into red light, and emits the converted red light toward the inner lens 40 and the outer lens 2. The inner lens 40 and the outer lens 2 are arranged in the front direction relative to the light conversion component 34. At least one of the inner lens 40 and the outer lens 2 is a red lens. If one of the lenses is red, the other lens may be a transparent lens.

[0025] Since at least one of the inner lens 40 and the outer lens 2 is a red lens, the excitation light component included in the external light entering the vehicle lamp 100 from the outside of the vehicle is absorbed by the inner lens 40 or the outer lens 2. Therefore, it is possible to prevent the light conversion member 34 from emitting light due to the excitation light component included in the external light.

[0026] The inner housing 5 is formed of, for example, a black resin material, etc. A predetermined space is formed by the inner housing 5 and the inner lens 40 .

[0027] (Description of Supporting Section 6 and Light Conversion Component 34)

[0028] Figure 3 It is shown Figure 2 FIG. 5 shows how the light conversion component 34 is installed in the inner shell 5. Figure 3 In the embodiment, the support portion 6 installed in the inner housing 5 supports the light conversion component 34 via the adhesive sheet 7. The adhesive sheet 7 is an acrylic double-sided tape. The support portion 6 and the adhesive sheet 7 are formed so that their outer shapes follow the outer shapes of the light conversion component 34 (similar shapes). The outer shapes of the support portion 6 and the adhesive sheet 7 may be the same shape as the outer shape of the light conversion component 34, a shape smaller than the light conversion component 34, or a shape larger than the light conversion component 34. In addition, the outer shape of the support portion 6 may be a shape along which at least a part of the outer shape of the light conversion component 34 follows.

[0029] (Description of Light Source Section 30)

[0030] Figure 4A and Figure 4B 3 is a diagram for explaining the light conversion unit 3. Figure 4AIn the embodiment, the light conversion unit 3 includes a light source section 30, a light conversion component 34 composed of a substrate 35 and a light emitting layer 36. The light source section 30 has an excitation light source 4, a supporting substrate 32 supporting the excitation light source 4, and an optical component 33 that converts the blue excitation light from the excitation light source 4 into parallel light or nearly parallel light. Figure 4B This is a diagram of the optical component 33 as viewed from obliquely below, where a prism 331 is provided below the optical component 33 and the upper portion of a collimating lens 332 is visible.

[0031] The support substrate 32 supports the excitation light source 4. The support substrate 32 is supported by the cover 31, and the cover 31 is supported by the housing 1. The excitation light source 4 is, for example, a light source such as an LED or an organic EL. The excitation light source 4 is, for example, arranged above the light conversion component 34, and emits excitation light toward the optical component 33. The excitation light source 4 emits blue light as excitation light. In addition, the excitation light source 4 is not limited to a light source that emits blue light, and a light source that can irradiate light (purple light, ultraviolet light, etc.) with a wavelength shorter than the wavelength of the generated light generated in the light conversion component 34 can be used.

[0032] (Description of Optical Component 33)

[0033] The optical component 33 is a lens that controls the excitation light emitted from the excitation light source 4 and makes it incident on the light conversion component 34. The optical component 33 is arranged opposite to the excitation light source 4. The optical component 33 has an incident portion where the excitation light from the excitation light source 4 is incident, a reflection portion that reflects the incident excitation light, and an emission portion that emits the excitation light to the light conversion component 34. The incident portions are arranged corresponding to the number of the excitation light sources 4.

[0034] The optical component 33 reflects the excitation light incident from the incident part at the reflecting part. The reflecting part controls the excitation light to be directed toward the emitting part side as parallel light. The optical component 33 includes a collimating lens 333 . Figure 5 is a cross-sectional view of the optical component 33. Figure 5 For the sake of convenience, Figure 2 The positional relationship between the excitation light source 4 and the optical component 33 in the figure is shown upside down. The cross-section of the light incident portion of the collimating lens 333 is M-shaped, so-called an incident surface with an inverted cup shape. When the divergent excitation light from the excitation light source 4 is incident on the inverted cup-shaped incident surface, the light becomes approximately parallel light on the exit surface 334 of the collimating lens 333 and is incident on the light conversion component 34. That is, in the figure, the light incident from the first incident surface goes directly and approximately straight in the direction of the light conversion component 34, but the light incident from the second incident surface is first reflected on the side of the lens and goes in the direction of the light conversion component 34. In this way, approximately parallel light can be incident on the light conversion component 34.

[0035] Furthermore, although not shown, a diffusion prism may be formed on the emitting surface 334 of the collimating lens 333. The diffusion prism is a prism shape such as a fisheye prism. Through the prism, the light can be first parallelized and then locally and evenly diffused again, so that the pattern P of the light conversion component 34 can be properly illuminated.

[0036] (Description of the Light Conversion Component 34)

[0037] The light conversion component 34 is configured to be inclined relative to the front direction. Figure 2 As shown, the light conversion component 34 is arranged to have a predetermined inclination relative to the incident angle of the excitation light incident on the light conversion component 34. The angle is, for example, an angle greater than 0° and less than 90°, preferably any angle in the range of 5° to 85°. The larger the angle, the larger the area of ​​the light conversion component 34 when viewed from above, so that the light conversion component 34 can be made to receive the irradiation of the excitation light from above more easily. Thus, the generated light (red light as the secondary light) can be effectively generated.

[0038] like Figure 3 As shown, the light conversion member 34 is bonded to the support portion 6 mounted on a part of the inner case 5 and held at a desired angle. The light conversion member 34 is bonded to the support portion 6 via an acrylic adhesive sheet. Alternatively, the light conversion member 34 may be bonded to the support portion 6 using an adhesive.

[0039] exist Figure 2 In the embodiment, the excitation light emitted from the excitation light source 4 is controlled by the inner lens as the optical member 33 and enters the light conversion member 34. In addition, the excitation light irradiated from the excitation light source 4 may be controlled to enter the light conversion member 34 using a reflector.

[0040] (Description of the Light Conversion Member 34, the Holding Member 35, the Light Emitting Layer 36, and the Light Reflecting Material 37)

[0041] The light conversion member 34 is formed with Figure 4A The predetermined pattern P shown. Figure 6 As shown, the light conversion component 34 has a substrate 35 and a light emitting layer 36 .

[0042] The substrate 35 is composed of an aluminum substrate, and the light emitting layer 36 is formed on the aluminum substrate. The substrate 35 has the same shape as the light emitting layer 36 and can be formed into a predetermined pattern P. Figure 6 In the figure, the light emitting layer 36 is shown as a square shape, but the light emitting layer 36 of a desired shape pattern P can be formed by implementing an appropriate design mask in the process of forming the light emitting layer 36. In addition, the substrate 35 can be glass or the like.

[0043] In addition, whether glass or aluminum is used for the substrate 35 depends on the temperature or design when the light emitting layer 36 is formed. When aluminum is used for the substrate 35, it functions as a reflection mechanism that reflects the light from the light emitting layer 36.

[0044] Furthermore, other transparent substrates also function as the substrate 35. When glass or a transparent substrate is used as the substrate 35, aluminum is attached to the back surface thereof, and the aluminum plate functions as a reflection mechanism for reflecting light from the light emitting layer 36.

[0045] The light emitting layer 36 is held on one surface of the substrate 35. The light emitting layer 36 is excited by being irradiated with the excitation light from the excitation light source 4 to emit generated light (red light as secondary light). The light emitting layer 36 is formed, for example, in a shape corresponding to the shape of the tail lamp when viewed from the front. Figure 4A As shown, the light emitting layer 36 is a member having a predetermined pattern P.

[0046] In this embodiment, an inorganic material such as CASN (CaAlSiN3: Eu) can be used as the light-emitting layer 36. In this case, the inorganic light-emitting layer can be formed by applying a mixed material of a transparent resin such as silicone resin and CASN to the substrate 35 and firing it. Alternatively, the inorganic light-emitting layer can be formed by applying a mixed material of an inorganic material such as low-melting-point glass and CASN to the substrate 35 and firing it.

[0047] The inorganic light-emitting layer may be a product of a mixture of a transparent resin (e.g., silicone) and CASN:Eu (a powdered red light-emitting body) sintered at 50°C, etc., but is not limited to this specific example. Any material that functions as an inorganic light-emitting body falls within the scope of the present invention. For example, a phosphor may be mixed with a silicone resin, or a phosphor may be mixed with an epoxy resin.

[0048] When an inorganic material is used as the inorganic light emitting layer, a substrate such as aluminum can be used as the substrate 35. In addition, other types of materials such as SCASN (Sr, Ca) AlSiN3:Eu can also be used as the inorganic light emitting layer.

[0049] (Description of a method for producing the light conversion member 34 using an inorganic material)

[0050] The following is a method for producing the light conversion component 34 including the inorganic light emitting body. First, an inorganic solvent is produced. A low melting point powdered glass material having a desired softening point and a powdered fluorescent material called CASN (CaAlSiN) are added to an organic solvent and mixed to produce the desired solvent.

[0051] First, in step 1, a design mask layer for forming a desired pattern P is placed and fixed on a glass or aluminum substrate. In step 2, a desired solvent is applied from above the substrate on which the design mask layer is layered. In step 3, the solvent overflowing from above the design mask layer is removed. In step 4, only the design mask layer is removed, and only the portion of the solvent having high adhesion to the substrate remains with its shape maintained. In step 5, sintering is performed at a temperature above a predetermined temperature to vaporize the unnecessary solvent.

[0052] In this way, the inorganic luminescent material layer 36 forms a desired pattern P on the substrate, and the substrate 35 and the inorganic luminescent material layer 36 constitute the light conversion member 34 .

[0053] In addition, the light conversion component 34 is also made by a scraper method. In the scraper method, first, a wheel having a plurality of protrusions is rotated from a pool storing a viscous inorganic luminescent material so that the inorganic luminescent material is wound by the protrusions. Next, the inorganic luminescent material wound above the height of the protrusions is scraped off by a scraper. Next, by rotating a take-up roller disposed opposite to the wheel synchronously with the wheel, the inorganic luminescent material stored in the gaps of the protrusions is transferred to the surface of the substrate moving simultaneously with the rotation of the take-up roller. Then, the inorganic luminescent material transferred to the substrate in a layered manner is subjected to a drying process and transferred to a sintering process together with the substrate.

[0054] In this way, the inorganic luminescent material 36 transferred onto the substrate 35 forms a desired pattern P, and the substrate 35 and the inorganic luminescent material 36 constitute the light conversion member 34 .

[0055] In addition, regarding the material of the substrate, any material can be used as long as it is durable against the heating temperature required in the above-mentioned production process. Considering the flexibility and efficiency of production, aluminum substrates are preferred, and considering the design, glass substrates are preferred.

[0056] As described above, the light conversion component 34 is manufactured to be flat or substantially flat. In addition, the light conversion component 34 can be curved, and can be flat and curved.

[0057] Figure 4A The desired pattern P shown in FIG. 1 is formed by the light emitting layer 36 , and the portion other than the pattern P is a portion of the substrate where no inorganic light emitting material layer is formed due to the design of the mask layer, that is, a portion of the substrate to which the inorganic light emitting material is not transferred.

[0058] In addition, the light emitting layer 36 may be made of organic materials and form an organic light emitting body. The organic light emitting body includes a substrate, an organic light emitting layer, an aluminum layer, and a packaging part.

[0059] (Description of a method for manufacturing the light conversion member 34 using an organic material)

[0060] In the case of organic materials, in step 1, a design mask layer made of stainless steel is formed on a glass substrate. In step 2, an organic light-emitting layer made of an organic light-emitting material (fluorescent material) is deposited. The organic light-emitting material is composed of a main component that absorbs a blue energy component and an additive component that emits light using the light absorbed by the main component. The component ratio of the additive component is less than 10%. In step 3, an aluminum layer is deposited as a reflective material. In step 4, after removing the design mask layer, a SiN layer is deposited by a CVD method to form a packaging portion composed of a SiN layer. In step 5, an adhesive layer is formed, and in step 6, an aluminum material is pasted as a protective material.

[0061] The thickness of the glass substrate is about 0.7 mm. The thickness of the organic light emitting layer is about The thickness of the aluminum layer is about The thickness of the SiN layer of the encapsulation part is about several microns. The thickness of the adhesive layer is about more than 10 microns. The thickness of the aluminum material (protective material) is about 0.15 mm. In this way, the light conversion component 34 of the required pattern P, which is the same as that of the inorganic light-emitting body, can be manufactured.

[0062] Fig. 7A and Figure 7B It is a diagram for explaining the arrangement of optical components and the excitation light source 4 . Fig. 7A 1 is a diagram showing an optical component unit 701 composed of seven optical components 33. The optical component unit 701 is integrally molded from acrylic resin by injection molding. Figure 7B 4 is a diagram showing the arrangement of seven excitation light sources 4. Fig. 7A and Figure 7B It can be seen that the light source component unit is formed based on the configuration of seven excitation light sources 4. Further, in the optical component unit 701, the threaded fastening holes for mounting the optical component unit 701 on the holding substrate 34 are also integrally formed by injection molding.

[0063] Figure 8 3 is a diagram for explaining the positional relationship between the optical component 33 and the light conversion component 34. The optical component 33 is formed to correspond to the shape of the light conversion unit 34. Since the shape of the light conversion unit 34 is determined based on the light emitting pattern P made of the light emitting layer 36, it can be said that the optical component 33 is formed to correspond to the shape of the light emitting pattern P. Similarly, the configuration of the excitation light source 4 is also determined based on the shape of the light conversion unit 34 or the shape of the light emitting pattern P.

[0064] 9A to 9C It is a cross-sectional view for explaining another embodiment of the optical component 33 . Fig.9AThis is an embodiment in which a Fresnel lens 901 is used as the optical component 33. In this embodiment, the Fresnel lens 901 is arranged so that a Fresnel prism surface 901 (a) of the Fresnel lens 901 faces the excitation light source 4. Fig. 9B This is also an embodiment using the Fresnel lens 902 as the optical component 33 . In this embodiment, the Fresnel lens 902 is configured such that the Fresnel prism surface 902 ( a ) of the Fresnel lens 902 is located on the opposite side of the excitation light source 4 . Fig. 9C The embodiment using a rectangular light guide 903 as the optical member 33 is shown. A prism is formed on a side surface 903 ( a ) of the light guide 903 , and the light guide 903 is arranged and configured so that the excitation light 4 enters the light guide 903 from one end 904 .

[0065] In the present embodiment, the invention is described by taking the tail lamp as an example, but the present invention can also be applied to a brake lamp, a turn signal lamp, a rear lamp, etc.

Claims

1. A vehicle lamp, characterized in that: have: A lamp housing and a lamp lens, which form a space; An excitation light source, which is disposed in the space and emits blue excitation light; an optical component, which is arranged in the space and is disposed corresponding to the excitation light source so as to allow the excitation light emitted from the excitation light source to enter and emit parallel light or light close to parallel light; as well as a light conversion member disposed in the space, provided at a position receiving light from the optical member, and formed into a predetermined shape based on the light emitting pattern (P), The lamp lens is a red lens, or a separate red outer lens is provided on the outer side of the lamp lens.

2. The vehicle lamp according to claim 1, characterized in that: A plurality of excitation light sources and optical components are provided, and the plurality of excitation light sources and the optical components are provided at positions corresponding to the shape of the light conversion component or the shape of the light emitting pattern (P).

3. The vehicle lamp according to claim 2, characterized in that: The plurality of excitation light sources are supported on a support substrate, and the plurality of optical components are composed of optical component units integrally formed by injection molding using acrylic resin.

4. The vehicle lamp according to claim 3, characterized in that: In the optical component unit, the screw fastening holes for attaching the optical component unit to the support substrate are also integrally formed by injection molding.

5. The vehicle lamp according to claim 1, characterized in that: The optical component includes a collimating lens.

6. The vehicle lamp according to claim 4, characterized in that: The optical component includes a prism in an emission portion of the optical component.

7. The vehicle lamp according to claim 1, characterized in that: The optical component includes a Fresnel lens.

8. The vehicle lamp according to claim 1, characterized in that: The optical component is provided with a prism in an incident portion of the optical component.

9. The vehicle lamp according to claim 1, characterized in that: The excitation light source emits blue excitation light.

10. The vehicle lamp according to claim 1, characterized in that: The light conversion component includes an inorganic material.

11. The vehicle lamp according to claim 1, characterized in that: The light conversion component includes an organic material.

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