LED light source assembly and side lighting device employing same

Abstract

The disclosed high-power LED light source assembly comprises: an LED chip for emitting light toward the facet of an optical fiber; a chip mount on which the LED chip is mounted; a refractive lens disposed between the chip mount and the light incident surface of the optical fiber to concentrate the light from the LED chip on the facet of the optical fiber; and an optical fiber connector for positioning the facet of the optical fiber on a light traveling path from the LED chip.

Description

LED light source assembly and side lighting device applying the same

[0001] The present disclosure relates to a high-power LED light source assembly and a side lighting device applying the same, and more particularly, to a light source assembly using an LED as a light source and a side lighting optical fiber lighting device applying the same.

[0002] Optical fibers are optical transmission media used for a variety of purposes, including optical communications, solar power generation, decorative lighting, and artificial lighting for horticulture. These optical fibers comprise a core through which light propagates and a cladding, a coating covering the core. These fibers are available in single strands or bundles, depending on the application.

[0003] Typically, an optical fiber comprises a core through which light propagates and a cladding, a membrane-like structure covering the core. Depending on the application, a single optical fiber may be used, or in plant cultivation systems such as solar power generation or smart farms, optical fibers may be bundled to transmit large amounts of light energy.

[0004] Among the optical fibers used for solar power generation, information display, decorative lighting, or artificial lighting, there are so-called side-emitting optical fibers, or more precisely side-emitting optical fibers, that emit light from the side of the optical fiber.

[0005] This optical fiber has light-passing windows formed in the cladding surrounding the core, through which light traveling through the core exits. These light-passing windows are opening areas through which some of the light traveling through the core of the optical fiber exits. Research is needed on a light-exiting structure that allows light to exit from the core with low loss and high efficiency.

[0006] LEDs can be used as a light source for these optical fibers. However, unlike LDs, which form a directional light beam, LEDs generate diffuse light. Therefore, in order to effectively inject this diffuse light into the optical fiber, a highly efficient optical coupling device is required, and research into this is necessary.

[0007] Meanwhile, the inventors of the present invention have proposed an optical fiber structured with a refractive lens implanted in the optical fiber. However, this optical fiber has a structure in which the refractive lens is attached using an adhesive. The process of bonding the refractive lens to the optical fiber using an adhesive is extremely difficult and requires a considerable amount of time. In particular, the adhesive used to bond the refractive lens is located along the light propagation path, making it impossible to avoid light transmission loss due to light blocking, absorption, or scattering.

[0008] The present disclosure presents a high-efficiency LED light source assembly capable of injecting LED light into a fiber-optic fiber.

[0009] The present disclosure proposes a high-efficiency LED light source assembly and a side-emitting lighting device capable of effectively outputting light supplied therefrom.

[0010] LED light source assembly according to the present disclosure:

[0011] An LED chip that irradiates light toward the facet of an optical fiber;

[0012] A chip mount on which the above LED chip is mounted;

[0013] A refractive lens disposed between the chip mount and the light incident surface of the optical fiber to focus light from the LED chip onto the mirror surface of the optical fiber; and

[0014] An optical fiber connector is provided that positions the mirror surface of the optical fiber on the light propagation path from the LED chip.

[0015] According to one or more embodiments,

[0016] The above assembly:

[0017] A housing having heat dissipation fins formed on its outer surface to accommodate the above chip mount; and

[0018] A tube for accommodating the refractive lens may be further provided between the housing and the optical fiber connector.

[0019] According to one or more embodiments,

[0020] Both ends of the above-mentioned optical fiber are fixed to the housing and the optical fiber connector, and

[0021] The above optical fiber connector may further include a fixed wing to which the optical tube is fixed.

[0022] According to one or more embodiments,

[0023] A reflective surface may be formed on one side of the chip mount facing the refractive lens to reflect light emitted from the LED chip to the refractive lens.

[0024] According to one or more embodiments,

[0025] A reflective surface may be formed on one side of the chip mount facing the refractive lens to reflect light emitted from the LED chip onto the lens.

[0026] According to one or more embodiments, the reflective surface has a conical reflective surface, at the center of which the LED chip may be positioned.

[0027] According to one or more embodiments,

[0028] The above reflective surface has a conical reflective surface, and the LED chip can be positioned at the center thereof.

[0029] A lighting device according to one or more embodiments:

[0030] A high-power LED light source assembly comprising: an LED chip that irradiates light toward a facet of an optical fiber; a chip mount on which the LED chip is mounted; a refractive lens that is positioned between the chip mount and a light incident surface of the optical fiber to focus light from the LED chip onto the facet of the optical fiber; and an optical fiber connector that positions the facet of the optical fiber on a light propagation path from the LED chip; and

[0031] An optical fiber is provided, which is coupled to the above light source assembly and includes a core through which light propagates and a clad covering the core, in which one or more light passage windows are formed through which light exits from the core.

[0032] According to one or more embodiments,

[0033] A refractive lens may be installed in the optical passage window of the above optical fiber.

[0034] According to one or more embodiments,

[0035] The refractive lens of the above side-emitting illumination device may be an in-situ formed resin refractive lens directly fixed to the light passage window.

[0036] According to one or more embodiments,

[0037] The above side-emitting lighting device:

[0038] A housing having heat dissipation fins formed on its outer surface to accommodate a top chip mount; and

[0039] A tube for accommodating the refractive lens may be further provided between the housing and the optical fiber connector.

[0040] A side-emitting lighting device according to one or more embodiments:

[0041] Both ends of the above-mentioned optical fiber are fixed to the housing and the optical fiber connector, and

[0042] The above optical fiber connector may further include a fixed wing to which the optical tube is fixed.

[0043] In a side-emitting lighting device according to one or more embodiments, a reflective surface may be formed on one surface of the chip mount facing the refractive lens to reflect light emitted from the LED chip to the refractive lens.

[0044] In the side-emitting lighting device according to one or more embodiments, the reflective surface may have a conical reflective surface, and the LED chip may be positioned at the center thereof.

[0045] FIG. 1 is a schematic perspective view of a side-emitting lighting device having a high-power light source assembly according to the present disclosure.

[0046] FIG. 2 is a cross-sectional view of a portion of an optical fiber applied to the side-emitting lighting device illustrated in FIG. 1.

[0047] FIG. 3 is a schematic exploded perspective view of the high-power light source assembly according to the present disclosure.

[0048] Figure 4 is a front view of the assembled high-power light source assembly illustrated in Figure 3.

[0049] FIG. 5 is a partial cross-sectional view of an LED mount applied to the high-power light source assembly illustrated in FIG. 3.

[0050] Figure 6 is a schematic cross-sectional view of the assembled state of the high-power light source assembly illustrated in Figure 3.

[0051] FIG. 7 shows the optical relationship between the LED chip, the optical fiber, and the refractive lens therebetween in the light source assembly according to the present disclosure.

[0052] FIGS. 8a to 8e show an optical fiber structure and its manufacturing process according to one embodiment of the present disclosure.

[0053] FIGS. 9a and 9b are enlarged photographs showing a solid refractive lens portion of an optical fiber manufactured according to the present disclosure.

[0054] FIG. 10 is an enlarged photograph of a solid refractive lens of an optical fiber manufactured according to the present disclosure.

[0055] FIGS. 11 and 12 show the output of light through a solid refractive lens of a plurality of light-passing windows provided on the side of an optical fiber when light is injected from the mirror surface of an optical fiber manufactured according to the present disclosure.

[0056] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. However, the embodiments of the present invention may be modified in various different forms, and the scope of the present invention should not be construed as being limited by the embodiments described below. It is preferable to interpret that the embodiments of the present invention are provided to more completely explain the present invention to a person having average knowledge in the art. Like reference numerals denote like elements throughout. Furthermore, various elements and areas in the drawings are schematically drawn. Therefore, the present invention is not limited by the relative sizes or intervals drawn in the attached drawings.

[0057] While terms like "first" and "second" may be used to describe various components, these components are not limited by these terms. These terms are used solely to distinguish one component from another. For example, a first component could be referred to as a "second component," and vice versa, without departing from the scope of the present invention.

[0058] The terminology used in this application is only used to describe specific embodiments and is not intended to limit the concept of the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, it should be understood that the expressions “comprises” or “has” are intended to specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, operations, components, parts, or combinations thereof.

[0059] Unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention pertains. Furthermore, it is to be understood that commonly used terms, such as those defined in dictionaries, should be interpreted to have a meaning consistent with their meaning within the relevant technical context, and should not be interpreted in an overly formal sense unless explicitly defined herein.

[0060] In some embodiments, where the implementation is otherwise feasible, a particular process sequence may be performed in a different order than described. For example, two processes described in succession may be performed substantially simultaneously, or in a reverse order from the described order.

[0061] In the attached drawings, variations in the shapes depicted may be expected, for example, depending on manufacturing techniques and / or tolerances. Therefore, embodiments of the present invention should not be construed as limited to the specific shapes of the regions depicted herein, and should include, for example, changes in shapes resulting from the manufacturing process. As used herein, the term "and / or" includes each and every combination of the mentioned components.

[0062] Hereinafter, with reference to the attached drawings, an embodiment of a high-power light source assembly according to the present disclosure and a side-emitting lighting device applying the same will be described.

[0063] FIG. 1 is a schematic perspective view of a side-emitting lighting device (1) having a high-power light source assembly (100) according to the present disclosure.

[0064] Referring to Fig. 1, a plurality of light-emitting refractive lenses (300) are attached to one side of an optical fiber (200) such as an optical fiber, and a light source assembly (100) is connected to the other end thereof.

[0065] The lighting device (1) as described above receives light from a light source assembly (100) on one side (right side in the drawing) and emits light through a plurality of light-emitting refracting lenses (300) provided on the other side (left side in the drawing).

[0066] The above-mentioned light-emitting refractive lens (300) is fixed to a light-passing window penetrating the clad of the optical fiber (200). Fig. 2 schematically illustrates a cross-section of the optical fiber (200) to which the above-mentioned light-emitting refractive lens (300) is fixed.

[0067] The optical fiber (200) includes a core (201) and a clad (202) covering the core. A light-transmitting window (203) is formed in the clad (202), and the surface of the core (201) is partially exposed at the lower portion of the light-transmitting window (203). The light-emitting refractive lens (300) is fixed to the light-transmitting window (203). The light-emitting refractive lens (300) is formed in situ by a liquid resin supplied to the light-transmitting window (203) and fixed in place. That is, the light-emitting refractive lens (300) is physically very strongly bonded to the light-transmitting window (203) without relying on an adhesive. This bonding force is generated by molecular interactions, physical forces, chemical forces, etc. between the surface of the optical fiber and the surface of the refractive lens.

[0068] The above-described light-emitting refractive lens (300) has a dome-shaped lens head (301) with a rounded upper surface protruding above the opening plane of the light-passing window (203) and a stem (302) in the form of a short leg below it. In addition, a skirt (303) is formed around the lower side of the lens head (301). The stem (302) is a portion that is fixed by contacting the core (201) of the optical fiber (200) below the opening plane of the light-passing window (203) and has a shape that matches the inner profile of the cavity above the core (201) below the light-passing window (203). This is because the stem (302) is formed by a liquid resin injected into the cavity below the light-passing window (203).

[0069] Accordingly, the stem (302) is fixed to the core (201) while filling the cavity, and the dome-shaped lens head (301) thereon is positioned to protrude above the light passage window (203), and the skirt (303) is overlapped on the clad (202) at the edge of the light passage window (203).

[0070] The above-described light-passing window (203) can be formed by mechanical processing such as drilling so that the surface of the core (201) is exposed to the outside at the lower bottom by penetrating the outer skin, i.e., the clad (202), of the optical fiber (200). According to this mechanical processing, processing is also performed on a part of the surface of the core, and according to this processing, the surface of the core that is cut off due to the limitations of mechanical processing is not as clean as a mirror but is rough. This rough surface to be processed causes light transmission loss by absorbing and scattering the passing light. However, according to the present invention, since the light-emitting refractive lens (300) is formed directly on the surface of the optical fiber by a material such as a liquid resin, the above-described problem is greatly improved.

[0071] FIG. 3 is a schematic exploded perspective view of the high-power light source assembly (100) according to the present disclosure, and FIG. 4 is a front view of the assembled state.

[0072] Referring to FIGS. 3 and 4, an optical fiber connector (130) and a light source lens head (110) that secure an optical fiber (200) on both sides of the optical axis (x-x') are arranged.

[0073] Between the optical fiber connector (130) and the light source lens head (110), a refractive lens optical part (120) is positioned to focus LED light from the lens head (110) onto the optical fiber connector (130).

[0074] The above light source lens head (110) has an LED mount (114) on which an LED chip (111) positioned on the optical axis is mounted, and a housing (113) having a plurality of heat dissipation fins (113a) for accommodating the LED chip (111) and dissipating heat. As shown in FIG. 5, the LED mount (114) has a structure in which a concave cone-shaped reflective surface (114a) is formed on the upper surface of a cylindrical body, and the LED chip (111) is installed at the center of the bottom thereof. The LED mount (114) may be fixed to the housing (113) using an adhesive, and according to another embodiment, may be fixed using a general fastening part or fastening structure. The reflective surface (114a) may be a surface of the LED mount (114) that has been subjected to a reflective treatment, and according to another embodiment, may be provided by a separately manufactured reflector.

[0075] Returning to FIGS. 3 and 4, the optical fiber connector (130) is connected to a ferrule-shaped fixing sleeve (131) to which the optical fiber (200) is fixed, and a fixing wing (132) to which the fixing sleeve (131) is coupled, and a cross-section of the optical fiber (200), i.e., a mirror surface (facet, 200a), is exposed toward the LED chip (111) through a light-passing opening (132a) of the fixing wing (132).

[0076] The above refractive lens optical part (120) has a refractive lens (121) that focuses light from the LED chip (111) onto the mirror surface (200a) of the optical fiber (200) and a barrel (122) that receives the refractive lens and is coupled to the fixed wing (132).

[0077] The above-mentioned tube (122) is coupled to the fixed wing (132) and the housing (113), and can be integrally fixed to the fixed wing (132) and coupled to the housing (113) by a ring-shaped nut (123).

[0078] The above ring-shaped nut (123) is used to fix the skirt-shaped flange (113b) of the housing (113) to the end of the barrel (122), and for this purpose, a screw portion (122a) that is coupled to the ring-shaped nut (123) may be formed on the outer surface of the skirt-shaped flange (113b). The barrel (122) may be coupled to the fixed wing (132) by the screw portion (122a) located thereon, and thus, a screw portion may be formed on the inner side of the optical tube and the opening of the long-term fixed wing (132).

[0079] A refractive lens (121) is installed inside the above-mentioned barrel (122), and the refractive lens (121) located inside the barrel (122) can be fixed to the barrel (122) by a screw-type spacer.

[0080] Figure 6 is a schematic front view of the assembled state of the high-power light source assembly (100) illustrated in Figure 3.

[0081] Referring to Fig. 6, in the light source assembly (100), the optical lens head (110) as a main body in which the LED chip is built is coupled to the barrel (122) of the refractive lens optical part (120) by a ring-shaped nut (123). A heat dissipation for radiating heat from the LED chip is formed on the outer periphery of the optical lens head (110).

[0082] A refractive lens (121) is positioned inside the above-mentioned barrel (122), and a ring screw-type spacer (124) fixes the refractive lens (121) inside the barrel (122).

[0083] The above-mentioned optical tube (122) is coupled to a fixed wing (132) of an optical fiber connector (130) to which an optical fiber (200) is coupled. A sleeve (131) that fixes the optical fiber (200) coaxially to a refractive lens (121) within the optical tube (122) is fixed to the fixed wing (132).

[0084] The sleeve (131) has a ferrule shape provided at the end of the optical fiber (200) and is fixed so that the mirror surface of the optical fiber (200) faces the refractive lens (121).

[0085] Figure 7 shows the optical relationship between the LED chip (111) of the optical lens head (110), the mirror surface (200a) of the optical fiber (200), and the optical refractive lens (121) between them.

[0086] As illustrated in FIG. 7, light (111a) from an LED chip (111) is focused to converge on the mirror surface (200a) of the optical fiber (200) as diffused light while passing through an optical refractive lens (121). At this time, the light (111a) does not form a focus on the mirror surface (200a) of the optical fiber (200), but is focused within a region of a certain area, specifically, within an area of ​​the mirror surface (200a) of a certain diameter. If the light (111a) forms a focus on the mirror surface, the mirror surface of the optical fiber (200) may be damaged due to excessive energy concentration.

[0087] In the LED light source assembly as described above, according to one embodiment, the LED chip may be a white chip, and a color filter of a predetermined color that determines the passing wavelength may be installed between the LED chip and the optical fiber. According to another embodiment, the reflective surface of the light wave concentrator may contain a coloring agent such as a pigment or dye, thereby functioning as a color filter.

[0088] Hereinafter, according to one embodiment of the present invention, a process for manufacturing a fiber-type optical fiber that forms a refractive lens without an adhesive by forming a light-emitting refractive lens (300) in situ on an optical fiber, i.e., an optical fiber (200) itself, and in particular, suppresses light scattering and absorption at an interface will be described.

[0089] As shown in Fig. 8a, an optical fiber (200) having a core (201) and a clad (202) covering the core (201) is prepared.

[0090] As illustrated in FIG. 8b, the clad (202) is partially machined to form a light-transmitting window (203) in the clad (202). A high-speed drilling machine can be used to form the light-transmitting window (203), and thus a concave machined surface (201') is generated on the surface of the core (201) below the light-transmitting window (203). The depth of this machined surface (201') can be adjusted according to design conditions, and can be formed to a very shallow depth as illustrated in FIG. 4b, or can be formed close to the center of the core in the form of a well of a predetermined depth.

[0091] As illustrated in FIG. 8c, a resin (301") for forming a refractive lens is supplied in the form of a droplet to the light-passing window (203) using a nozzle (400) of a liquid resin supply device. The liquid resin supply device may have a needle-shaped supply nozzle (400) and a resin supply unit that supplies liquid resin to the nozzle.

[0092] The above resin may be a naturally curing crystal resin that is used by mixing the main agent and the hardener, or a UV resin that is cured by ultraviolet rays as a single material.

[0093] The above liquid resin (301") contains a coloring agent of a specific color, so that a color refractive lens can be implemented using the liquid resin.

[0094] FIG. 8d shows a state in which a liquid refractive lens (300') is formed on a light-passing window (203) by a liquid resin (301"). The liquid resin (301") supplied to the light-passing window (203) has a dome-shaped lens head (301) whose upper surface is rounded by surface tension, and the stem (302) at the bottom thereof is in contact with the light-passing window (203) and the machined surface (201') of the core at the bottom thereof. In addition, the edge of the lens head (301) overlaps the clad (202) around the light-passing window (203). The liquid resin (301") is supplied from above the light-passing window (203) to fill the cavity at the bottom thereof, thereby completely covering the surface of the core (201) and the clad (202) of the light-passing window (203), thereby protecting the exposed portion of the core (201) and its periphery from the air.

[0095] In this way, the liquid resin (301") supplied in the form of a droplet to the light passage window (203) is formed into a liquid refractive lens (30') that completely covers the light passage window (203) and protrudes partially above it, and hardens over time.

[0096] Crystal resin is supplied in the form of droplets containing a hardener (or curing agent) in the base resin, so after being supplied to the light-transmitting window (203), it gradually hardens naturally in the form of a refractive lens. In the case of UV resin, ultraviolet light is required for curing.

[0097] Figure 8e shows a state in which a solid-state refractive lens (300) is formed in situ on an optical fiber (200) after the curing of the resin is complete. The refractive lens (300) may be formed of a colorless resin, and a coating film may be formed on its surface. The coating film may be formed not only on the refractive lens (300) but also on the entire surface of the optical fiber (200). Such a coating film may be obtained by applying a coating material to the entire optical fiber after the formation of the refractive lens is complete.

[0098] According to one or more embodiments, the coating film may be a protective coating or a color coating film, and further, according to one or more embodiments, the refractive lens may be a color refractive lens containing at least one of a transparent dye, a pigment, and a pigment dispersion.

[0099] According to one or more embodiments of the present disclosure, by forming a refractive lens in situ using a liquid material on an optical fiber, which is an element of an optical fiber, the light-emitting refractive lens (300) is very strongly fixed to the optical fiber (200) by physical adhesion. This adhesion of the light-emitting refractive lens (300) is generated by molecular interactions, physical forces, chemical forces, etc., between the optical fiber and the surface and the refractive lens surface.

[0100] By forming a light-emitting refractive lens (300) in the optical fiber's light-passing window through the above process, an adhesive that causes optical loss becomes unnecessary. In addition, the machined surface of the core, which has been roughened by mechanical processing, is densely filled with liquid resin, thereby integrating the core and the solid refractive lens, thereby reducing optical loss due to optical scattering and reflection at the interface between the core and the refractive lens.

[0101] FIG. 9 is a partially enlarged photograph of an optical fiber having a solid refractive lens formed in situ on the surface of the optical fiber according to an embodiment of the present disclosure. As shown, a liquid resin supplied in the form of droplets forms a round solid refractive lens on the surface of the optical fiber.

[0102] Figure 10d is a planar magnified photograph of a solid refractive lens formed in situ in a light-transmitting window. As shown in Figure 7, the contact portion with the core of the optical fiber is shown to be very brightly illuminated, and light scattering in the refractive lens formation region is greatly reduced, resulting in a very bright donut-shaped bright region in the center.

[0103] Figures 11 and 12 show the output of light through a solid refractive lens of a plurality of light-passing windows provided on the side of the optical fiber when light is injected from one end of the optical fiber.

[0104] As illustrated in Figures 11 and 12, the intensity of light emitted from the side of the optical fiber is very high. This is because the solid refractive lens is completely integrated into the core of the optical fiber, so that the boundary between the core and the refractive lens is completely physically bonded, and thus very high intensity light can escape through the refractive lens.

[0105] If only a light-transmitting window is processed on the side of an optical fiber, the light has limitations in directivity and angle, and since the unprocessed side does not scatter light, the optical fiber must be processed in three or five or more radial directions as shown in FIGS. 1 and 2. However, this process requires very difficult mass-production processing equipment. However, when a solid refractive lens is formed using resin in only one direction around the optical fiber as in the present invention, light is scattered in all 360 degrees and the intensity of the light also increases significantly.

[0106] While the light source assembly and lighting device using the same according to embodiments of the present invention have been described with reference to the embodiments illustrated in the drawings to aid understanding, these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent embodiments are possible. Therefore, the true technical protection scope of the present invention should be defined by the appended claims.

Claims

1. An LED chip that irradiates light toward the facet of an optical fiber; A chip mount on which the above LED chip is mounted; A refractive lens disposed between the chip mount and the light incident surface of the optical fiber to focus light from the LED chip onto the mirror surface of the optical fiber; and A high-power LED light source assembly comprising an optical fiber connector that positions the mirror surface of the optical fiber on the light propagation path from the LED chip.

2. In paragraph 1, A housing having heat dissipation fins formed on its outer surface to accommodate the above chip mount; and A high-power LED light source assembly further comprising a tube that accommodates the refractive lens and is provided between the housing and the optical fiber connector.

3. In paragraph 2, Both ends of the above-mentioned optical fiber are fixed to the housing and the optical fiber connector, and A high-power LED light source assembly further comprising a fixing wing to which the optical fiber connector is fixed.

4. In paragraph 2 or paragraph 3, A high-power LED light source device, wherein a reflective surface is formed on one side of a chip mount facing the refractive lens to reflect light emitted from the LED chip to the refractive lens.

5. In paragraph 1, A high-power LED light source device, wherein a reflective surface is formed on one side of a chip mount facing the refractive lens to reflect light emitted from the LED chip onto the lens.

6. In paragraph 5, A high-power LED light source assembly having a conical reflective surface and the LED positioned at the center thereof.

7. In either of paragraphs 1 or 3, A high-power LED light source assembly having a conical reflective surface and the LED chip positioned at the center thereof.

8. A high-power LED light source assembly comprising: an LED chip that irradiates light toward a facet of an optical fiber; a chip mount on which the LED chip is mounted; a refractive lens that is positioned between the chip mount and the light incident surface of the optical fiber to focus light from the LED chip onto the facet of the optical fiber; and an optical fiber connector that positions the facet of the optical fiber on the light propagation path from the LED chip; and A side-emitting lighting device comprising: an optical fiber; coupled to the light source assembly; comprising a core through which light propagates; and a clad covering the core, wherein one or more light-transmitting windows are formed through which light from the core escapes.

9. In paragraph 8, A side-emitting lighting device having a refractive lens installed in the above light-passing window.

10. In paragraph 8, A side-emitting illumination device, wherein the above refractive lens is an in-situ formed resin refractive lens directly fixed to the light passage window.

11. In paragraph 8, A housing having heat dissipation fins formed on its outer surface to accommodate a top chip mount; and A side-emitting lighting device further comprising a tube provided between the housing and the optical fiber connector to accommodate the refractive lens.

12. In paragraph 11, Both ends of the above-mentioned optical fiber are fixed to the housing and the optical fiber connector, and A side-emitting lighting device further comprising a fixed wing to which the optical fiber connector is fixed.

13. In paragraph 12, A side-emitting lighting device having a reflective surface formed on one side of a chip mount facing the refractive lens to reflect light emitted from the LED chip onto the refractive lens.

14. In paragraph 13, A side-emitting lighting device having a conical reflective surface and an LED chip positioned at the center thereof.

15. In any one of paragraphs 8 to 14, A side-emitting lighting device in which a conical reflective surface is formed on one side of a chip mount facing the refracting lens to reflect light emitted from the LED chip to the refracting lens, and the LED is positioned at the center of the conical reflecting surface.

Images