Linear light-emitting elements, lamp assemblies, and automobiles

Abstract

The present invention provides a linear light-emitting element having a side light emission region. The linear light-emitting element comprises a rod-shaped core layer, the core layer having at least one end face that allows light from a light source to be received and incident on it; a cladding layer surrounding the outer surface of the core layer, having a lower refractive index than the core layer, and allowing light from the core layer to be incident on the cladding layer by refraction; a transparent light-emitting layer surrounding the outer surface of the cladding layer, which transmits light from the cladding layer; and a reflective layer at least partially covering the outer surface of the transparent light-emitting layer, which at least partially faces the side light emission region and reflects light from the transparent light-emitting layer toward the side light emission region.

Description

Technical Field

[0001] Embodiments of the present invention generally relate to the field of lighting and / or signaling, particularly to linear light-emitting elements, lamp assemblies, and motor vehicles.

Background Art

[0002] Linear light-emitting elements such as optical fibers are often used in motor vehicles to provide specific lighting and / or signaling functions and decorative functions. For example, they are used as ambient lights to improve the atmosphere inside the vehicle. Prior art linear light-emitting elements generally consist of a core layer and a cladding layer surrounding the outside of the core layer. The cladding layer contains scattering elements, and these scattering elements enable the light entering the core layer from the end face of the linear light-emitting element to come out from the entire outer peripheral surface of the linear light-emitting element. Thus, prior art linear light-emitting elements emit light evenly in a 360-degree range. This type of linear light-emitting element has the problem of low brightness.

Summary of the Invention

[0003] An object of the present invention is to solve or overcome at least one of the above-mentioned other problems and drawbacks in the prior art.

[0004] According to one aspect of the present invention, in a linear light-emitting element having a side light-emitting region, there is a rod-shaped core layer configured such that at least one end face of the core layer is capable of receiving and admitting light from a light source, a cladding layer surrounding the outer peripheral surface of the core layer, having a refractive index lower than that of the core layer, and into which light from the core layer enters by refraction, a transparent light-emitting layer surrounding the outer peripheral surface of the cladding layer, configured to transmit light from the cladding layer, and a reflective layer at least partially covering the outer peripheral surface of the transparent light-emitting layer, configured to reflect light from the transparent light-emitting layer toward the side light-emitting region and at least partially facing the side light-emitting region. A linear light-emitting element is provided.

[0005] In some embodiments, the reflective layer is configured to cover at least half the area of ​​the outer surface of the cladding layer.

[0006] In some embodiments, the materials for the transparent light-emitting layer and the reflective layer are selected such that the adhesion between the transparent light-emitting layer and the cladding layer is stronger than the adhesion between the reflective layer and the cladding layer.

[0007] In some embodiments, the cladding layer is formed from a fluorine-containing material, and the transparent light-emitting layer is formed from a fluorine-free material.

[0008] In some embodiments, the outer surface of the transparent light-emitting layer is configured as a flat or curved surface.

[0009] In some embodiments, the transparent light-emitting layer includes a scattering element for scattering light.

[0010] In some embodiments, the lateral light emission region includes at least a portion of the outer surface of the transparent light emission layer.

[0011] In some embodiments, fixing means for securing the linear light-emitting element to a mounting member are formed on the reflective layer.

[0012] In some embodiments, the fastening means includes an engaging portion configured to form a snap-fit ​​connection (snap-type fitting) with the mounting member.

[0013] In some embodiments, the engaging portion comprises an elastic engaging head, which extends away from the reflective layer and has an arrow-shaped cross-section, and is configured to cooperate with a through-slot of the mounting member.

[0014] In some embodiments, a hollow portion is formed in the elastic engagement head to facilitate elastic deformation.

[0015] In some embodiments, the engaging portion comprises an engaging surface that includes at least a portion of the outer surface of the reflective layer, and is configured to contact an elastic snap-fit ​​connector (connector for snap-type mating) on ​​the mounting member.

[0016] In some embodiments, the fastening means includes through holes configured to be connected to the mounting member by bolts via threads.

[0017] In some embodiments, an extension is formed in the reflective layer, which extends substantially in the opposite direction to the direction in which light emanates laterally from the linear light-emitting element, and through holes are formed in the extension.

[0018] In some embodiments, two wing-shaped portions extending in opposite directions are formed in the reflective layer, both of which extend in a direction that intersects the direction in which light is emitted laterally from the linear light-emitting element, and through holes are formed in the two wing-shaped portions.

[0019] In some embodiments, a rounded groove is formed at the connection point between the wing-shaped portion and the reflective layer.

[0020] In some embodiments, the fixing means includes a joint portion configured to form an adhesive bond with the mounting member.

[0021] In some embodiments, the linear light-emitting element further comprises an outer lens formed integrally with a transparent light-emitting layer, and the lateral light-emitting area includes at least a portion of the outer surface of the outer lens.

[0022] In some embodiments, a fixing means for fixing the linear light-emitting element to a mounting member is further formed on an integral part consisting of an outer lens and a transparent light-emitting layer.

[0023] In some embodiments, the fixing means includes at least one of an engaging portion for forming a snap-fit connection with the mounting member, a through hole for forming a screw connection, and a joining portion for forming an adhesion connection.

[0024] In some embodiments, the linear light-emitting element includes a flexible optical fiber that emits light to the side.

[0025] In some embodiments, the base material of the core layer comprises an acrylic block copolymer and / or polymethyl methacrylate.

[0026] In some embodiments, the base material of the cladding layer comprises a fluoropolymer.

[0027] In some embodiments, the fluoropolymer comprises an ethylene propylene fluoride copolymer and / or polyvinylidene fluoride.

[0028] In some embodiments, the cladding layer contains an ultraviolet absorbing substance, The cladding layer contains a light diffusing substance.

[0029] In some embodiments, the base material of the transparent light-emitting layer comprises a flexible thermoplastic transparent resin.

[0030] In some embodiments, the flexible thermoplastic transparent resin has a hardness of less than A100, The flexible thermoplastic transparent resin comprises a flexible thermoplastic acrylic resin.

[0031] In some embodiments, the transparent light-emitting layer contains an antioxidant, The transparent light-emitting layer contains an ultraviolet absorbing substance.

[0032] In some embodiments, the base material of the reflective layer comprises a flexible thermoplastic transparent resin.

[0033] In some embodiments, the flexible thermoplastic transparent resin has a hardness of less than A100. The flexible thermoplastic transparent resin comprises a flexible thermoplastic acrylic resin.

[0034] In some embodiments, the substrate for the reflective layer and the substrate for the transparent light-emitting layer are the same.

[0035] In some embodiments, the reflective layer contains an antioxidant, The reflective layer contains ultraviolet absorbing material. The reflective layer contains color powder and / or color masterbatch.

[0036] In some embodiments, the ultraviolet absorbing material comprises at least one of the low-volatility dimers 2-hydroxybenzotriazole and hydroxyphenylbenzotriazole.

[0037] According to another aspect of the present invention, embodiments further provide a lamp assembly comprising one of the linear light-emitting elements described above and a light source that emits light toward at least one end face of the linear light-emitting element.

[0038] In some embodiments, the lamp assembly further comprises a mounting member for attaching and securing a linear light-emitting element, wherein the connection between the mounting member and the linear light-emitting element includes at least one of a snap-fit ​​connection, a screw connection, or a bonding connection.

[0039] According to another aspect of the present invention, embodiments further provide a vehicle equipped with the lamp assembly described above.

[0040] Other objects and advantages of the present invention will become apparent through the following detailed description of the invention with reference to the drawings, which also aid in a broader understanding of the invention.

[0041] These and / or other aspects, features, and advantages of the present invention will become clearer and easier to understand through the following description of exemplary embodiments in connection with the accompanying drawings. [Brief explanation of the drawing]

[0042] [Figure 1] A schematic diagram showing a perspective view of the linear light-emitting element 100 according to the present invention. [Figure 2] This figure schematically shows a cross-section of the linear light-emitting element 100 in Figure 1, cut along the line F-F. [Figure 3] A schematic diagram showing a perspective view of a lamp assembly according to the first embodiment of the present invention. [Figure 4] This figure schematically shows a cross-section of the lamp assembly cut along line G-G in Figure 3. [Figure 5] A schematic diagram showing a perspective view of a lamp assembly according to a second embodiment of the present invention. [Figure 6] This figure schematically shows a cross-section of the lamp assembly cut along line H-H in Figure 5. [Figure 7] A schematic diagram showing a perspective view of a lamp assembly according to a third embodiment of the present invention. [Figure 8] This figure schematically shows a cross-section of the lamp assembly cut along line I-I in Figure 7. [Figure 9] Figures 7 and 8 schematically show a cross-sectional view of a modified embodiment of the lamp assembly according to the third embodiment of the present invention. [Figure 10] A schematic diagram showing a perspective view of a lamp assembly according to a fourth embodiment of the present invention. [Figure 11] This figure schematically shows a cross-section of the lamp assembly cut along line J-J in Figure 10. [Figure 12] A schematic diagram showing a perspective view of a lamp assembly according to a fifth embodiment of the present invention. [Figure 13] This figure schematically shows a cross-section of the lamp assembly cut along line K-K in Figure 12. [Modes for carrying out the invention]

[0043] The embodiments of the present invention will now be described in detail in reference to the accompanying drawings. In this description, identical or similar components are indicated by identical or similar reference numerals. The following description of embodiments of the present invention with reference to the accompanying drawings is intended to illustrate the general concepts disclosed in the present invention and should not be interpreted as limiting the invention.

[0044] Furthermore, in the following detailed description, many specific details are elaborated to facilitate explanation and to provide a broad understanding of the embodiments of the present invention. However, it is clear that one or more embodiments can be carried out without these specific details. In other sections, well-known structures and devices are shown in the form of references to simplify the drawings.

[0045] Figure 1 schematically shows a perspective view of the linear light-emitting element 100 according to the present invention.

[0046] Figure 2 schematically shows a cross-section of the linear light-emitting element 100 in Figure 1, cut along line F-F. As shown in each figure, the linear light-emitting element 100 has two end faces 110 and a side light emission area 120. At least one end face 110 is configured to receive and allow light from a light source (not shown) to enter it. Light that enters the interior of the linear light-emitting element 100 exits from the side light emission area 12. In other words, the linear light-emitting element 100 is an element that emits light to the sides. Specifically, the linear light-emitting element 100 further comprises a rod-shaped core layer 130 made of a transparent material. Light from the light source enters the core layer 130 through the end face 110 and can propagate in the longitudinal direction of the linear light-emitting element 100 toward the other end face by total internal reflection inside the core layer 130. Furthermore, although the core layer 130 has a circular cross-sectional shape in this embodiment, the core layer 130 may have an elliptical, polygonal, irregular, or any other suitable cross-sectional shape. The cladding layer 140 surrounds the outer surface of the core layer 130, that is, completely covers the outer surface of the core layer 130. The cladding layer 140 may be made of a transparent material and have a lower refractive index than the core layer 130. Some of the light from the core layer 130 can enter the cladding layer 12 by refraction. For example, the cladding layer 140 may be made of a scattering material, or light extraction elements (e.g., optical protrusions, optical recesses, optical rough surfaces, and sawtooth groups, but not limited to these) may be provided on the cladding layer 140. This eliminates the conditions for total internal reflection of some of the light within the core layer 130, allowing this light to enter the cladding layer 140.

[0047] In this invention, "transparent material" means a material that can transmit light, but it must be explained that this may be completely transparent, or semi-transparent, or may have a different transmittance or haze value. This is not specifically defined here.

[0048] In an embodiment of the present invention, the linear light-emitting element 100 further comprises a reflective layer 150 and a transparent light-emitting layer 160. The transparent light-emitting layer 160 surrounds the outer circumferential surface of the cladding layer 140, that is, completely covers the outer circumferential surface of the cladding layer 140. The transparent light-emitting layer 160 is made of a transparent material and is configured to transmit light from the cladding layer 140. In the example shown in Figure 2, the side light-emitting region 120 includes at least a portion of the outer circumferential surface of the transparent light-emitting layer 160. The reflective layer 150 covers at least partially the outer circumferential surface of the transparent light-emitting layer 160. Thus, the reflective layer 150 is separated from the cladding layer 140, that is, it is not in contact with the cladding layer 140. The reflective layer 150 contains an opaque material and is configured to at least partially face the side light-emitting region 120 and reflect light from the transparent light-emitting layer 160 toward the side light-emitting region 120. The reflected light then passes through the transparent light-emitting layer 160, the cladding layer 140, and the core layer 130, thus reaching the side light-emitting region 120.

[0049] In embodiments of the present invention, by providing a reflective layer containing an opaque material on the outside of the cladding layer, the linear light-emitting element no longer emits light throughout the entire 360-degree range, but rather emits light only in the required partial area (side light emission area), thereby reducing light leakage and improving optical efficiency. The overall brightness of the linear light-emitting element is increased, and the requirements can be met even with minimal brightness.

[0050] In embodiments of the present invention, the cladding layer is protected by a transparent light-emitting layer covering it, preventing scratches on the cladding layer and thus avoiding undesirable bright spots caused by scratches on the cladding layer. The transparent light-emitting layer can also improve the wear resistance of the linear light-emitting element.

[0051] In embodiments of the present invention, if a portion of the outer surface of the cladding layer is covered by the reflective layer, then if the adhesion between the cladding layer material and the reflective layer material is insufficient (for example, but not limited to, if the cladding layer is made of a fluorine-containing material), a void will appear between the cladding layer and the reflective layer. Since the cladding layer is transparent and the reflective layer is opaque, the void will be very noticeable and will have a significant impact on the appearance. For this reason, in embodiments of the present invention, since the cladding layer is surrounded by a transparent light-emitting layer, even if a void appears (because both layers are transparent), the void will not be easily noticeable.

[0052] Preferably, the materials of the transparent light-emitting layer 160 and the reflective layer 150 are selected such that the adhesion between the transparent light-emitting layer 160 and the cladding layer 140 is stronger than the adhesion between the reflective layer 150 and the cladding layer 140. In a non-limiting example, the cladding layer 140 is formed of a fluorine-containing material, and the transparent light-emitting layer 160 is formed of a fluorine-free material.

[0053] In order to allow more light to be emitted through the side light emission area 120, it is preferable that the reflective layer 150 is configured to cover at least half the area of ​​the outer surface of the transparent light emission layer 160.

[0054] The transparent light-emitting layer 160 preferably includes scattering elements to scatter light from the cladding layer and reflective layer, thereby improving the uniformity of the illumination effect. For example, but not limited to, the transparent light-emitting layer 160 may be made of a scattering material, or scattering unit elements such as optical protrusions, optical depressions, or optical rough surfaces may be formed on the inner and / or outer surfaces of the transparent light-emitting layer. Furthermore, as shown in each figure, the transparent light-emitting layer 160 has a flat outer surface to satisfy the styling requirement of a flat appearance, but of course the transparent light-emitting layer 160 may also have a curved outer surface in response to other styling requirements.

[0055] To reduce costs and simplify the process, it is preferable that each layer of the linear light-emitting element 100 is formed by a co-extrusion process.

[0056] The substrate of the core layer 130 preferably comprises an acrylic block copolymer (MAM) and / or polymethyl methacrylate (PMMA).

[0057] The substrate of the clad layer 140 preferably comprises a fluoropolymer. The fluoropolymer includes, for example, ethylene fluoride propylene (FEP) and / or polyvinylidene fluoride (PVDF). The clad layer 140 may further contain several additives. For example, the clad layer 140 may contain an ultraviolet absorbing substance, or the clad layer 140 may contain a light-diffusing substance that has a light-diffusing effect.

[0058] The substrate of the transparent light-emitting layer 160 is preferably made of a flexible thermoplastic transparent resin. The hardness of the flexible thermoplastic transparent resin is preferably less than A100. The flexible thermoplastic transparent resin includes, for example, a flexible thermoplastic acrylic resin. The transparent light-emitting layer 160 may further contain several additives. For example, the transparent light-emitting layer 160 may contain an antioxidant that has the effect of preventing oxidation of the substrate, and the transparent light-emitting layer 160 may contain an ultraviolet absorbing substance.

[0059] The substrate of the reflective layer 150 is preferably made of a flexible thermoplastic transparent resin. The hardness of the flexible thermoplastic transparent resin is preferably less than A100. The flexible thermoplastic transparent resin includes, for example, a flexible thermoplastic acrylic resin. Furthermore, it is preferable that the substrate of the reflective layer 150 and the substrate of the transparent light-emitting layer 160 are the same in order to ensure good adhesion between the reflective layer 150 and the transparent light-emitting layer 160. The reflective layer 150 may further contain several additives. For example, the reflective layer 150 may contain an antioxidant, the reflective layer 150 may contain an ultraviolet-absorbing substance, and the reflective layer 150 may contain a color powder and / or a color masterbatch. The color powder and / or color masterbatch can improve reflectivity by changing the substrate of the reflective layer 150.

[0060] In the above embodiment, the ultraviolet-absorbing material absorbs ultraviolet light, providing the linear light-emitting element 100 with ultraviolet resistance, and preventing yellowing of the linear light-emitting element 100 when exposed to ultraviolet light. Thus, the lifespan and quality of the linear light-emitting element 100 can be extended. Furthermore, compared to adding the ultraviolet-absorbing material to the cladding layer 140, adding the ultraviolet-absorbing material to the transparent light-emitting layer 160 simplifies the manufacturing process without incurring extra costs and also increases the ultraviolet resistance of the linear light-emitting element 100. This is because the transparent light-emitting layer 160 has a greater thickness than the cladding layer 140 and is located on the outermost part of the linear light-emitting element 100 overall.

[0061] The ultraviolet absorbing material includes, for example, at least one of the low-volatility dimers 2-hydroxybenzotriazole and hydroxyphenylbenzotriazole, but this application is not limited thereto.

[0062] Hereinafter, lamp assemblies equipped with the linear light-emitting element 100 described above will be presented using various embodiments.

[0063] An embodiment of the present invention comprises a linear light-emitting element 100 and a light source (not shown). As stated above, the linear light-emitting element 100 is rod-shaped and of the side-emitting type. Light from the light source enters the interior of the linear light-emitting element 100 through at least one end face of the linear light-emitting element 100 and exits from at least a portion of the outer surface of the linear light-emitting element 100. Optionally, the lamp assembly may further comprise a mounting member 200 (used to mount and fix the linear light-emitting element 100), or it may be embedded in another structure to achieve a complete and smooth appearance. An embodiment of the present invention can provide any suitable type of lighting function (for example, but not limited to, illumination, signaling, decorative, etc.).

[0064] 1. First embodiment of a lamp assembly

[0065] Figure 3 schematically shows a perspective view of a lamp assembly according to the first embodiment of the present invention, and Figure 4 schematically shows a schematic cross-section of the lamp assembly in Figure 3 cut along line G-G. As shown in Figures 3 and 4, the reflective layer 150 of the linear light-emitting element 100 also has fixing means formed therein for fixing the linear light-emitting element 100 to the mounting member 200. The fixing means includes an engaging portion configured to form a snap-fit ​​connection with the mounting member 200. Specifically, the engaging portion includes an elastic engaging head 300 made of an elastic material. The elastic engaging head 300 extends away from the reflective layer 150 in a direction substantially opposite to the direction in which light is emitted laterally from the linear light-emitting element 100. The elastic engaging head 300 and the reflective layer 150 may be made of the same material or different materials, and for example, without limitation, they may be formed as a single unit by co-extrusion or injection molding. The elastic engagement head 300 has an arrow-shaped cross-section, with the portion connected to the reflective layer 150 being the handle portion 310, and the portion connected to the handle portion 310 being the deformable portion 320. Correspondingly, the mounting member 200 is provided with a through-slot 210. When the linear light-emitting element 100 is attached, the elastic engagement head 300 passes through the through-slot 210, and in this process, the deformable portion 320 undergoes elastic deformation. After passing through the through-slot 210, the deformable portion 320 recovers from its deformation and contacts the surface near the through-slot 210, preventing it from detaching.

[0066] It is preferable that a hollow portion 330 is formed in the deformable portion 320 of the elastic engagement head 300. This is because it allows the deformable portion 320 to deform more easily during the process of passing through the through slot 210.

[0067] In embodiments of the present invention, the fixing means is formed in the reflective layer and does not directly act on the core layer or cladding layer. This prevents abnormal bright spots caused by pressure on the core layer or cladding layer and also improves the appearance of the linear light-emitting element.

[0068] 2. Second embodiment of the lamp assembly

[0069] Figure 5 schematically shows a perspective view of a lamp assembly according to a second embodiment of the present invention, and Figure 6 schematically shows a schematic cross-section of the lamp assembly of Figure 5 cut along line H-H. As shown in Figures 5 and 6, the mounting member 200 comprises a translucent portion 230 and an opaque portion 240. The opaque portion 240 covers the outside of the translucent portion 230, leaving a light-transmitting window 220. This is so that light from the lateral light-emitting area 120 of the linear light-emitting element 100 can exit through the light-transmitting window 220. The opaque portion 240 may be a layer of paint, a film sheet, a painted layer, a screen-printed layer, an injection-molded layer, etc. As shown in each figure, two elastic snap-fit ​​connectors 250, positioned opposite each other, are integrally formed on the rear side of the translucent portion 230. A space capable of accommodating the linear light-emitting element 100 is formed between the two elastic snap-fit ​​connectors 250. When the linear light-emitting element 100 is attached, the linear light-emitting element 100 causes each elastic snap-fit ​​connector 250 to undergo elastic deformation. Once the linear light-emitting element 100 is fully inserted into the accommodating space between the two snap-fit ​​connectors, each elastic snap-fit ​​connector 250 returns to its original shape and contacts the outer surface of the reflective layer 150, preventing detachment. That is, in this embodiment, the fixing means for fixing the linear light-emitting element 100 to the mounting member 200 includes an engaging portion configured to form a snap-fit ​​connection with the mounting member 200. The engaging portion includes an engaging surface that includes at least a portion of the outer surface of the reflective layer 150. This engaging surface is configured to contact each elastic snap-fit ​​connector 250 on the mounting member 200.

[0070] Furthermore, in addition to the elastic snap-fit ​​connector 250, at least one recess for accommodating a linear light-emitting element may be formed on the back side of the translucent portion 230, and the shape of the recess may be made to match the shape of the linear light-emitting element.

[0071] It should be understood that the structure of the mounting member in this embodiment is not limited thereto. For example, the translucent portion 230 may be replaced with an opaque portion, and the elastic snap-fit ​​connector 250 or recess may be formed on the opaque portion. Then, for example, the translucent portion may be integrally formed on the opaque portion by injection molding or co-extrusion, and the translucent portion may form a translucent window 220.

[0072] In embodiments of the present invention, the fixing means is formed in the reflective layer and does not directly act on the core layer or cladding layer. This prevents abnormal bright spots caused by pressure on the core layer or cladding layer and also improves the appearance of the linear light-emitting element.

[0073] 3. Third Embodiment

[0074] Figure 7 schematically shows a perspective view of a lamp assembly according to a third embodiment of the present invention, and Figure 8 schematically shows a schematic cross-section of the lamp assembly in Figure 7 cut along line I-I. As shown in Figures 7 and 8, an extension portion 400 is formed on the reflective layer 150 of the linear light-emitting element 100. The extension portion 400 extends away from the reflective layer 150 in a direction substantially opposite to the direction in which light is emitted laterally from the linear light-emitting element 100. The extension portion 400 and the reflective layer 150 may be made of the same material or different materials, and are formed as a single unit by, for example, co-extrusion or injection molding, without limitation. A through hole is also formed in the extension portion 400. The mounting member 200 includes an upper mounting part 260 and a lower mounting part 270 that are arranged facing each other. The upper mounting part 260 and the lower mounting part 270 may be made of an opaque material and have through holes formed in both. During the installation of the linear light-emitting element 100, the linear light-emitting element 100 is inserted between the upper mounting part 260 and the lower mounting part 270, that is, the three components form a sandwich structure (with their respective through holes concentric with each other). Then, the bolt 500 is driven through the through holes of the three components in a direction that crosses the direction in which light is emitted laterally from the linear light-emitting element 100, and is connected to the nut 600 by threads. In other words, in this embodiment, the fixing means for fixing the linear light-emitting element 100 to the mounting member 200 is configured to have through holes formed in the extension part 400 and to be connected to the mounting member 200 by threads using a bolt.

[0075] Furthermore, as shown in each figure, in this embodiment the transparent light-emitting layer 160 has a T-shaped cross-section. The T-shaped cross-section extends outward, upward, and downward in the direction from which light emerges from the space between the upper mounting component 260 and the lower mounting component 270, and ultimately covers the outside of the upper mounting component 260 and the lower mounting component 270 so that the mounting member 200 does not require a transparent portion.

[0076] Figure 9 schematically shows a cross-sectional view of a modified embodiment of the lamp assembly according to the third embodiment of the present invention. As shown in Figure 9, in this modified embodiment, the core layer 130 has a D-shaped cross-section, that is, a flat portion on the side closer to the lateral light emission area. Correspondingly, both the inner and outer surfaces of the transparent light emission layer 160 are relatively flat to satisfy the styling requirement for a flat appearance. Two wing-shaped portions 700 extending in opposite directions are formed on the reflective layer 150. Both of the two wing-shaped portions 700 extend in a direction that crosses the direction in which light is emitted laterally from the linear light-emitting element 100. The wing-shaped portions 700 and the reflective layer 150 may be made of the same material or different materials, and are formed as a single unit by, for example, co-extrusion or injection molding, without limitation. Also, through holes are formed in each wing-shaped portion 700. The mounting member 200 includes an upper mounting part 260 and a lower mounting part 270 arranged facing each other. The upper mounting component 260 and the lower mounting component 270 may be made of an opaque material and have screw holes formed in both. The transparent light-emitting layer 160 is completely embedded between the upper mounting component 260 and the lower mounting component 270 so that no transparent portion is required in the mounting member 2. During the installation of the linear light-emitting element 100, the linear light-emitting element 100 is inserted between the upper mounting component 260 and the lower mounting component 270, and the through holes of the two wing-shaped portions 700 are aligned with the screw holes of the upper mounting component 260 and the lower mounting component 270. Two bolts 500 are each passed through the through holes in a direction in which light substantially exits the linear light-emitting element 100 to the side, and are finally screwed into the screw holes of the upper mounting component 260 and the lower mounting component 270. In other words, in this embodiment, the fixing means for fixing the linear light-emitting element 100 to the mounting member 200 is configured to include through holes formed in each wing-shaped portion 700 and to be connected to the mounting member 200 by screws using bolts.

[0077] As shown in each figure, it is preferable that a rounded groove is formed at the connection point between the wing-shaped portion 700 and the reflective layer 150 to prevent stress concentration.

[0078] In embodiments of the present invention, the fixing means is formed in the reflective layer and does not directly act on the core layer or cladding layer. This prevents abnormal bright spots caused by pressure on the core layer or cladding layer and also improves the appearance of the linear light-emitting element.

[0079] 4. Fourth Embodiment

[0080] Figure 10 schematically shows a perspective view of a lamp assembly according to a fourth embodiment of the present invention, and Figure 11 schematically shows a cross-sectional view of the lamp assembly in Figure 10 cut along line J-J.

[0081] As shown in Figures 10 and 11, two wing-shaped portions 700 extending in opposite directions are similarly formed on the reflective layer 150, and both of the two wing-shaped portions 700 extend in a direction that crosses the direction in which light is emitted laterally from the linear light-emitting element 100. The wing-shaped portions 700 and the reflective layer 150 may be made of the same material or different materials, and are formed as a single unit by, for example, co-extrusion or injection molding, without limitation. It is preferable that a round groove is formed at the connection point between the wing-shaped portion 700 and the reflective layer 150 to prevent stress concentration. The mounting member 200 comprises a translucent portion 230 and an opaque portion 240. The translucent portion 230 and the opaque portion 240 are integrally formed by co-extrusion, injection molding, or another manufacturing method, such that the translucent portion 230 is embedded in the opaque portion 240 to form a light-transmitting window 220. A T-shaped recess matching the shape of the linear light-emitting element 100 is formed in the opaque portion 240. During installation, the linear light-emitting element 100 can be placed in the T-shaped recess such that the side light emission area 120 faces the light-transmitting window 220. The reflective layer 150 and each wing-shaped portion 700 may then be joined (bonded) to the rubber block 800. The linear light-emitting element 100 is fixed by the rubber block 800 being joined to the inner wall of the T-shaped recess at the same time. In this embodiment, the joining area can be increased by each wing-shaped portion 700. However, it should be understood that it is also possible not to form wing-shaped portions 700 on the reflective layer 150 by using the outer surface of the reflective layer 150 as the joining surface.

[0082] In other words, in this embodiment, the fixing means for fixing the linear light-emitting element 100 to the mounting member 200 includes a joint portion formed in the reflective layer 150. The joint portion is configured to form an adhesive bond with the mounting member. The joint portion may include the outer surface of the reflective layer 150.

[0083] Furthermore, the structure of the mounting member 200 is not limited to this, and it could also be the structure of the second embodiment shown in Figure 6. That structure will not be described again here.

[0084] In embodiments of the present invention, the fixing means is formed in the reflective layer and does not directly act on the core layer or cladding layer. This prevents abnormal bright spots caused by pressure on the core layer or cladding layer and also improves the appearance of the linear light-emitting element.

[0085] 5. Fifth Embodiment

[0086] Figure 12 schematically shows a perspective view of a lamp assembly according to the fifth embodiment of the present invention, and Figure 13 schematically shows a cross-sectional view of the lamp assembly in Figure 12 cut along the line K-K.

[0087] As shown in Figures 12 and 13, the linear light-emitting element 100 further comprises an outer lens 170. The outer lens 170 is located outside the transparent light-emitting layer 160 in the direction from which light is emitted to the side. In this case, the side light-emitting area 120 includes at least a portion of the outer surface of the outer lens 170. The outer lens 170 and the transparent light-emitting layer 160 are integrally formed from the same material or different materials by, for example, injection molding or co-extrusion. The mounting member 200 comprises an upper mounting member 260 and a lower mounting member 270. Both of these members may be made of opaque material and surround the concave space 900. During the mounting of the linear light-emitting element 100, the linear light-emitting element 100 can be positioned within the concave space 900. The outer lens 170 protrudes outward from the concave space 900, but of course it can also be completely housed within the concave space 900. A fixing means for fixing a linear light-emitting element to a mounting member 200 is also formed on the integral part consisting of a transparent light-emitting layer 160 and an outer lens 170. The fixing means includes a fixing plate 180. The fixing plate 180 extends backward from the transparent light-emitting layer 160 and the outer lens 170 in a direction substantially opposite to the direction in which light is emitted to the side, and has through holes formed therein. The fixing plate 180 may be integrally formed with the transparent light-emitting layer 160 and the outer lens 170 (of the same or different materials). A gap 280 remains in the concave space 900 of the mounting member 200, and the fixing plate 180 extends out of the concave space 900 through the gap 280. Screw holes are formed in the lower mounting member 270 and are aligned with the through holes in the fixing plate 180. The bolt 500 is passed downward through the through hole in the fixing plate 180 (in a direction that crosses the direction in which light is emitted laterally from the linear light-emitting element 100) and is finally screwed into the threaded hole of the lower mounting member 270.

[0088] It should be understood that the fixing means formed on the integral product consisting of the transparent light-emitting layer 160 and the outer lens 170 is not limited to through holes used for screw connection with the mounting member, but may also include engaging parts for snap-fit ​​connection with the mounting member or joining parts for adhesive connection, as in the above embodiment. Furthermore, the fixing means formed on the integral product consisting of the transparent light-emitting layer 160 and the outer lens 170 may also be used in combination with the fixing means on the reflective layer 150 in the above embodiment.

[0089] In embodiments of the present invention, the linear light-emitting element can be better protected by an outer lens integrally formed with the transparent light-emitting layer, thus avoiding the need to further form a translucent portion on the mounting member. Thus, the process can be simplified and manufacturing costs can be reduced. Furthermore, by forming fixing means on the integral product consisting of the outer lens and the transparent light-emitting layer, it is possible to improve the appearance of the linear light-emitting element while preventing abnormal bright spots caused by direct pressure on the core layer and cladding layer.

[0090] Although various possible structures of the lamp assembly have been described above using different embodiments, it should be understood that the embodiments of the present invention are not limited to these, and any obvious variations of the above embodiments will still fall within the scope of protection of the present invention.

[0091] In embodiments of the present invention, in non-limiting embodiments, the linear light-emitting element may comprise a side-emitting type flexible optical fiber that can be bent as required. However, the present invention is not limited thereto, and any other suitable type of light-emitting element may be used.

[0092] Embodiments of the present invention further provide a vehicle equipped with a lamp assembly as described in any of the above embodiments.

[0093] While the present invention has been described in relation to the drawings, the embodiments disclosed in the drawings are intended to provide illustrative depictions of preferred embodiments of the present invention and should not be construed as limitations of the invention. The dimensional proportions in the drawings are merely schematic and should not be construed as limitations of the invention.

[0094] While several embodiments of the overall concept of the present invention have been illustrated and described, those skilled in the art will understand that modifications to these embodiments can be made without departing from the principles and spirit of the overall disclosure concept. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. In a linear light-emitting element having a lateral light emission area, A core layer having a rod shape, wherein at least one end face of the core layer is configured to allow light from a light source to be received and incident upon it, A cladding layer surrounding the outer surface of the core layer, having a lower refractive index than the core layer, such that light from the core layer is incident on the cladding layer by refraction; A transparent light-emitting layer surrounding the outer surface of the cladding layer, configured to transmit light from the cladding layer, A reflective layer that at least partially covers the outer surface of the transparent light-emitting layer, the reflective layer is configured to at least partially face the side light-emitting region so as to reflect light from the transparent light-emitting layer toward the side light-emitting region, A linear light-emitting element characterized by comprising the following features.

2. The linear light-emitting element according to claim 1, characterized in that the reflective layer is configured to cover at least half the area of ​​the outer surface of the transparent light-emitting layer.

3. The linear light-emitting element according to claim 1, characterized in that the materials of the transparent light-emitting layer and the reflective layer are selected such that the adhesion between the transparent light-emitting layer and the cladding layer is stronger than the adhesion between the reflective layer and the cladding layer.

4. The linear light-emitting element according to claim 3, characterized in that the cladding layer is formed of a fluorine-containing material and the transparent light-emitting layer is formed of a fluorine-free material.

5. The linear light-emitting element according to claim 1, characterized in that the outer surface of the transparent light-emitting layer is configured as a flat surface or a curved surface.

6. The linear light-emitting element according to claim 1, characterized in that the transparent light-emitting layer includes a scattering element for scattering light.

7. The linear light-emitting element according to any one of claims 1 to 6, characterized in that the lateral light emission area includes at least a portion of the outer circumferential surface of the transparent light emission layer.

8. A linear light-emitting element according to any one of claims 1 to 6, characterized in that a fixing means for fixing the linear light-emitting element to a mounting member is formed on the reflective layer.

9. The linear light-emitting element according to claim 8, characterized in that the fixing means includes an engaging portion configured to form a snap-fit ​​connection with the mounting member.

10. The linear light-emitting element according to claim 9, characterized in that the engaging portion comprises an elastic engaging head, the elastic engaging head extends away from the reflective layer and has an arrow-shaped cross-section, and is configured to cooperate with the through-slot of the mounting member.

11. The linear light-emitting element according to claim 10, characterized in that a hollow portion is formed in the elastic engagement head to facilitate elastic deformation.

12. The linear light-emitting element according to claim 9, characterized in that the engaging portion comprises an engaging surface including at least a part of the outer surface of the reflective layer, and the engaging surface is configured to contact an elastic snap-fit ​​connector on the mounting member.

13. The linear light-emitting element according to claim 8, characterized in that the fixing means has a through hole configured to be connected to the mounting member by a bolt via a screw.

14. The linear light-emitting element according to claim 13, characterized in that an extended portion is formed in the reflective layer, the extended portion extends substantially in a direction opposite to the direction in which light is emitted laterally from the linear light-emitting element, and the through hole is formed in the extended portion.

15. The linear light-emitting element according to claim 13, characterized in that two wing-shaped portions extending in opposite directions are formed in the reflective layer, both of the two wing-shaped portions extend in a direction that crosses the direction in which light is emitted laterally from the linear light-emitting element, and the through holes are formed in the two wing-shaped portions.

16. The linear light-emitting element according to claim 15, characterized in that a circular groove is formed at the connection point between the wing-shaped portion and the reflective layer.

17. The linear light-emitting element according to claim 8, characterized in that the fixing means includes a joint portion configured to form an adhesive bond with the mounting member.

18. A linear light-emitting element according to any one of claims 1 to 6 and 9 to 17, further comprising an outer lens formed integrally with the transparent light-emitting layer, wherein the lateral light-emitting region includes at least a portion of the outer surface of the outer lens.

19. The linear light-emitting element according to claim 18, characterized in that fixing means for fixing the linear light-emitting element to the mounting member are further formed in the integral product comprising the outer lens and the transparent light-emitting layer.

20. The linear light-emitting element according to claim 19, characterized in that the fixing means comprises at least one of an engaging portion for snap-fit ​​coupling with the mounting member, a through hole for screw coupling, and a joining portion for adhesive coupling.

21. The linear light-emitting element according to any one of claims 1 to 6, 9 to 17, and 19 to 20, characterized in that the linear light-emitting element comprises a flexible optical fiber that emits light to the side.

22. The linear light-emitting element according to any one of claims 1 to 6, 9 to 17, and 19 to 20, characterized in that the substrate of the core layer comprises an acrylic block copolymer and / or polymethyl methacrylate.

23. The linear light-emitting element according to any one of claims 1 to 6, 9 to 17, and 19 to 20, characterized in that the substrate of the cladding layer comprises a fluoropolymer.

24. The linear light-emitting element according to claim 23, characterized in that the fluoropolymer comprises fluoroethylene propylene copolymer and / or polyvinylidene fluoride.

25. The aforementioned cladding layer contains an ultraviolet absorbing material. The linear light-emitting element according to claim 1, characterized in that the cladding layer contains a light-diffusing material.

26. The linear light-emitting element according to any one of claims 1 to 6, 9 to 17, and 19 to 20, characterized in that the substrate of the transparent light-emitting layer comprises a flexible thermoplastic transparent resin.

27. The aforementioned flexible thermoplastic transparent resin has a hardness of less than A100. The linear light-emitting element according to claim 26, characterized in that the flexible thermoplastic transparent resin comprises a flexible thermoplastic acrylic resin.

28. The transparent light-emitting layer contains an antioxidant, The linear light-emitting element according to claim 1, characterized in that the transparent light-emitting layer contains an ultraviolet-absorbing substance.

29. The linear light-emitting element according to any one of claims 1 to 6, 9 to 17, and 19 to 20, characterized in that the substrate of the reflective layer comprises a flexible thermoplastic transparent resin.

30. The aforementioned flexible thermoplastic transparent resin has a hardness of less than A100. The linear light-emitting element according to claim 29, characterized in that the flexible thermoplastic transparent resin comprises a flexible thermoplastic acrylic resin.

31. A linear light-emitting element according to any one of claims 1 to 6, 9 to 17, and 19 to 20, characterized in that the substrate of the reflective layer and the substrate of the transparent light-emitting layer are the same.

32. The reflective layer contains an antioxidant, The aforementioned reflective layer contains an ultraviolet absorbing material. The linear light-emitting element according to claim 1, characterized in that the reflective layer comprises a color powder and / or a color masterbatch.

33. The linear light-emitting element according to claim 25, 28, or 32, characterized in that the ultraviolet-absorbing substance comprises at least one of the low-volatility dimers 2-hydroxybenzotriazole and hydroxyphenylbenzotriazole.

34. A linear light-emitting element according to any one of claims 1 to 33, A light source that emits light toward at least one end face of the linear light-emitting element, A lamp assembly characterized by having the following features.

35. The lamp assembly according to claim 34, further comprising a mounting member for attaching and fixing the linear light-emitting element, wherein the connection between the mounting member and the linear light-emitting element includes at least one of a snap-fit ​​connection, a screw connection, and an adhesive connection.

36. A vehicle characterized by comprising a lamp assembly according to any one of claims 34 to 35.

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