Lighting equipment

Abstract

The lighting device disclosed in the embodiment of the invention includes a lighting module having a substrate, a plurality of light sources arranged on the substrate in a second direction, and a light guiding portion arranged on the substrate and the light source, an optical lens arranged on the lighting module and having an incident surface having a width greater than the width of the lighting module in a first direction and an exit surface from which light incident on the incident surface exits, an insertion hole in which the light guiding portion is arranged, a reflecting member extending to both sides of the insertion hole and covering both sides of the light guiding portion, and a support portion supporting a lower edge of the optical lens, wherein the width of the light guiding portion and the insertion hole in the first direction is smaller than the length in the second direction, and an upper end of the reflecting portion is positioned higher than an upper end of the light guiding portion.

Description

[Technical field]

[0001] The embodiment relates to a lighting device having a light source.The embodiment relates to a vehicle lamp having a lighting device. [Background technology]

[0002] Lighting applications include not only vehicle lighting, but also backlights for displays and signboards. Light-emitting elements, such as light-emitting diodes (LEDs), have advantages such as low power consumption, semi-permanent lifespan, fast response speed, safety, and environmental friendliness compared to existing light sources such as fluorescent lamps and incandescent lamps. Such light-emitting diodes are applied to various display devices and various lighting devices such as interior and exterior lights. Recently, lamps using light-emitting diodes as vehicle light sources have been proposed. Compared to incandescent lamps, light-emitting diodes have the advantage of low power consumption. However, since the emission angle of light emitted from light-emitting diodes is small, there is a demand for increasing the light-emitting area of ​​lamps using light-emitting diodes when using light-emitting diodes as vehicle lamps. Light-emitting diodes are small in size, which allows for greater freedom in lamp design, and are also economical due to their semi-permanent lifespan. Summary of the Invention [Problem to be solved by the invention]

[0003] An embodiment of the invention provides a lighting device with an improved light distribution image. An embodiment of the invention provides a lighting device having a line width for a daytime running light (DRL) and made of a flexible material. An embodiment of the invention can provide a lamp for a vehicle such as a moving object having the lighting device. [Means for solving the problem]

[0004] An illumination device according to an embodiment of the invention includes a substrate having a length in a second direction longer than a width in a first direction, a plurality of light sources arranged on the substrate in a second direction, and an illumination module having a light guiding portion arranged on the substrate and the light sources, an optical lens arranged on the illumination module and having an incident surface having a width greater than the width of the illumination module in the first direction and an exit surface from which light incident on the incident surface exits, and an insertion hole in which the light guiding portion is arranged, a reflecting member extending to both sides of the insertion hole and covering both sides of the light guiding portion, and a support portion supporting a lower edge of the optical lens, wherein the light guiding portion and the insertion hole have a width smaller than the length in the second direction, and an upper end of the reflecting portion is positioned higher than an upper end of the light guiding portion.

[0005] According to an embodiment of the invention, the exit surface of the optical lens can refract the light incident on the entrance surface into parallel light.

[0006] According to an embodiment of the invention, a diffusion layer for diffusing light may be included on the light guide portion, and an upper end of the diffusion layer may be positioned higher than an upper end of the reflector portion.

[0007] The diffusion layer may be spaced from an incident surface of the light guiding section, and a width of the diffusion layer in a first direction may be the same as a width of the light guiding section in the first direction, and a length of the diffusion layer in a second direction may be the same as a length of the light guiding section in the second direction.

[0008] According to an embodiment of the invention, the entrance surface may be any one of a concave curved surface, a convex curved surface, and a flat surface in the minor axis direction. The exit surface may have a hemispherical shape or a Fresnel lens pattern.

[0009] According to an embodiment of the invention, a housing is included below the reflective member, and the reflective member may include a first recess in which the substrate is accommodated and a second recess in which an upper portion of the housing is accommodated. The reflective member may have a recess between the support portion and the reflective portion.

[0010] According to an embodiment of the invention, the material of the optical lens may be PMMA or PC, and the light guide may be made of a silicone or epoxy material that seals the light source. The width of the light guide in a first direction may be in the range of 3 mm to 7 mm, and the length of the light guide in a second direction may be 50 times or more the width in the first direction.

[0011] According to an embodiment of the invention, there is provided a lighting device including a substrate, a plurality of light sources arranged in one direction on the substrate, a lighting module having a light guide covering the plurality of light sources and having a length longer than a width, and a diffusion layer arranged on the light guide, an optical lens arranged on the lighting module and having an incident surface having a width greater than a width of the lighting module and an exit surface from which light incident on the incident surface exits, and a reflecting member having an insertion hole into which the light guide is inserted, a reflecting portion extending to both sides of the insertion hole and arranged along a periphery of the light guide, and a support portion supporting a lower edge of the optical lens, wherein the light guide and the insertion hole have a length greater than twice the width, and the reflecting portions of the reflecting member are arranged along both long sides and both short sides of the light guide, and the lighting module and the optical lens may have flexibility in a thickness direction and a width direction of the lighting module relative to the length direction.

[0012] According to an embodiment of the invention, an upper end of the reflector may be disposed higher than an upper end of the light guide and lower than an upper end of the diffusion layer. The reflector may have a recess between both outer sides of the reflector on the inside and both inner sides of the support on the outside. The exit surface of the optical lens may emit parallel light.

[0013] An illumination device according to an embodiment of the invention includes a substrate having a length in a second direction longer than a width in a first direction, a plurality of light sources arranged on the substrate in a second direction, a light guide disposed on the substrate and covering the plurality of light sources, a diffusion layer disposed on the light guide, an optical lens spaced apart on the diffusion layer and having an incident surface having a width greater than the width of the diffusion layer in the first direction and an exit surface from which light incident on the incident surface exits, and a reflective member having an insertion hole in which the light guide and the diffusion layer are disposed, first and second reflecting portions covering an extension on both sides of the insertion hole, and support portions supporting both end edges of the optical lens, wherein the diffusion layer may have an upper width smaller than a lower width in the first direction.

[0014] According to an embodiment of the invention, the diffusion layer includes a first region having the same width as the light guide portion, and a second region on the first region having a width smaller than the width of the light guide portion, and the outer surface of the second region of the diffusion layer may include a curved surface or an inclined surface.

[0015] According to an embodiment of the invention, the thickness of the second region may be greater than the thickness of the first region. The reflective member may include first and second protrusions protruding inward from one side and the other side of the second region, and an upper surface of the second region may be exposed in an area between the first and second protrusions. The width of the incident surface of the optical lens in the first direction may be in the range of 1.5 to 4.5 times the upper width of the diffusion layer.

[0016] A vehicle lamp according to an embodiment of the invention includes the lighting device disclosed above, wherein the lighting device is arranged as a line-shaped daytime running light. Effect of the Invention

[0017] According to the lighting device according to the embodiment of the present invention, it is possible to improve the luminous intensity and image, provide various light distribution images, provide lighting having a line width applicable to daytime running lights, and provide uniform light distribution of line lighting.

[0018] The embodiments of the invention can improve the light distribution of the lighting device, can use the lighting image in various forms, and can improve the optical reliability of the lighting device and the vehicle lamp having the same. The embodiments of the invention can be applied to a light unit having a lighting device, or an external or internal lighting lamp. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a side cross-sectional view of a lighting device according to an embodiment. [Diagram 2] FIG. 2 is a partially enlarged view of the lighting device of FIG. [Diagram 3] FIG. 3 is an example of a plan view of the lighting device of FIG. [Figure 4] 4A to 4C are diagrams showing examples of optical lenses in the illumination device of FIG. [Diagram 5] FIG. 5 is a diagram illustrating a light extraction path of the lighting device of FIG. [Figure 6] FIG. 6 is a diagram showing the shape, luminous intensity, and light distribution image according to each direction or position in the lighting device of the invention according to the shape of the optical lens. [Figure 7] FIG. 7 is a diagram showing the shape, luminous intensity, and light distribution image according to each direction or position in the lighting device of the invention according to the shape of the optical lens. [Figure 8] FIG. 8 is a diagram showing the shape, luminous intensity, and light distribution image according to each direction or position in the lighting device of the invention according to the shape of the optical lens. [Figure 9] FIG. 9 is a side cross-sectional view of a first modification of the illumination device of FIG. [Figure 10] FIG. 10 is a partially enlarged view of FIG. [Figure 11] FIG. 11 is a diagram showing light distribution images according to various directions or positions on the optical lens of FIG. [Figure 12] FIG. 12 is a diagram showing the luminous intensity of the lighting device of FIG. [Figure 13] FIG. 13 is a side cross-sectional view showing a second modified example of the lighting device of FIG. [Figure 14] FIG. 14 is a diagram showing light distribution images according to various directions or positions on the optical lens of FIG. [Figure 15] FIG. 15 is a diagram showing the luminous intensity of the lighting device of FIG. [Figure 16] FIG. 16 is a side cross-sectional view showing a third modified example of the lighting device of FIG. [Figure 17] FIG. 17 is a diagram showing light distribution images according to various directions or positions on the optical lens of FIG. [Figure 18] FIG. 18 is a diagram showing the luminous intensity of the lighting device of FIG. [Figure 19] FIG. 19 is a graph comparing light uniformity according to the height of the lighting module in the lighting device according to the embodiment of the present invention. [Figure 20] FIG. 20 is a diagram showing a lamp having a lighting device according to an embodiment of the invention. [Figure 21] FIG. 21 is an example of a tail light for the vehicle of FIG. [Figure 22] FIG. 22 is a diagram for explaining a running light of a vehicle to which the lighting device of the present invention is applied. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0021] The technical idea of ​​the present invention is not limited to some of the embodiments described, and may be embodied in various different forms, and one or more of the components of the embodiments may be selectively combined or substituted within the scope of the technical idea of ​​the present invention. Furthermore, the terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted as meanings that are generally understandable to those having ordinary skill in the art to which the present invention belongs, unless otherwise specifically defined and described, and commonly used terms such as terms defined in dictionaries may be interpreted in consideration of the contextual meaning of the relevant technology. Furthermore, the terms used in the embodiments of the present invention are intended to describe the embodiments, and are not intended to limit the present invention. In this specification, the singular form may include the plural form unless otherwise specifically limited, and when it is described as "at least one (or one or more) of A and B, C," it may include one or more of all combinations that can be combined with A, B, and C. Furthermore, in describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. Such terms are used to distinguish the component from other components, and do not determine the nature or order of the components. When a component is described as being "linked," "coupled," or "connected" to another component, it can include not only the case where the component is directly linked, coupled, or connected to the other component, but also the case where the component is "connected," "coupled," or "connected" by another component between the other component. When a component is described as being formed or disposed "above or below," the above or below includes not only the case where the two components are in direct contact with each other, but also the case where one or more other components are formed or disposed between the two components. When a component is described as being "above or below," it can include not only the above direction based on one component, but also the below direction.

[0022] The lighting device according to the present invention can be applied to various lamp devices requiring illumination, such as vehicle lamps, home lighting devices, and industrial lighting devices. For example, when applied to vehicle lamps, the lighting device can be applied to headlamps, side mirror lights, width lights, fog lights, tail lights, brake lights, daytime running lights, vehicle interior lighting, door scuffs, rear combination lamps, backup lamps, etc. The lighting device of the present invention can also be applied to indoor and outdoor advertising devices, display devices, and various electric vehicles, and can be applied to all lighting fields and advertising fields that are currently developed and commercialized or that can be realized through future technological development.

[0023] <Lighting equipment> FIG. 1 is a side cross-sectional view of an illumination device according to an embodiment, FIG. 2 is a partially enlarged view of the illumination device of FIG. 1, FIG. 3 is an example of a plan view of the illumination device of FIG. 1, (A)-(C) of FIG. 4 are drawings showing examples of optical lenses in the illumination device of FIG. 1, and FIG. 5 is a drawing explaining the light extraction path of the illumination device of FIG. 1.

[0024] 1 to 5, a lighting device 100 according to an embodiment of the invention includes a lighting module 10 and an optical lens 51. The lighting module 10 may include a substrate 11, light sources 13 arranged on the substrate 11, and a light guide unit 15 covering the light sources 13. The lighting module 10 may further include a diffusion layer 17 on the light guide unit 15. The lighting module 10 may have an upper width D1 in a first direction X smaller than a length in a second direction Y. The lighting module 10 may provide a line light having a narrow upper width D1 and a long length in the second direction Y, and the line light may have the same width as the upper width D1 of the lighting module 10 and be emitted with a uniform surface light distribution. In the drawings, the X direction may be a first direction, the Y direction may be a second direction perpendicular to the X direction, and the Z direction may be a thickness direction of the lighting module 10 and a third direction perpendicular to the first and second directions.

[0025] The height T1 of the lighting module 10 may be greater than the width D1 in the first direction X and less than the length in the second direction Y. Here, the ratio of the height T1 to the width D1 is 4:3 to 10:3, and the height T1 may be 4 mm or more, for example, in the range of 4 mm to 10 mm, and the width D1 may be 7 mm or less, for example, in the range of 3 mm to 7 mm or in the range of 4 mm to 6.5 mm. The height T1 may be 1.3 times or more, for example, in the range of 1.3 times to 3 times or in the range of 1.3 times to 2.5 times, of the width D1. Since the lighting module 10 has a thin width D1, the lighting module 10 can have flexibility to deform in a convex or concave shape in the first direction X with respect to the second direction Y. Furthermore, since the lighting module 10 has a low height T1, the lighting module 10 can have flexibility to deform in a convex or concave shape in the third direction Z with respect to the second direction Y. In addition, the optical lens 51 and the lighting module 10 can be flexible in the same direction.

[0026] The substrate 11 of the lighting module 10 may include a printed circuit board (PCB). The substrate 11 may include at least one of a resin-based printed circuit board (PCB), a metal core PCB, a flexible PCB, a ceramic PCB, or an FR-4 substrate. When the substrate 11 is a flexible PCB, the lighting device 100 having the lighting module 10 may be provided flexibly.

[0027] The substrate 11 is electrically connected to the light source 13. The substrate 11 includes a wiring layer (not shown) on an upper portion thereof, and the wiring layer is electrically connected to the light source 13. When a plurality of light sources 13 are arranged on the substrate 11, the plurality of light sources 13 may be connected in series, in parallel, or in a series-parallel configuration by the wiring layer. The substrate 11 may function as a base member or a support member disposed under the light source 13 and the light guide unit 15.

[0028] The upper surface of the substrate 11 may have an XY plane. The upper surface of the substrate 11 may be a flat surface or a curved surface. The thickness of the substrate 11 may be a height in a vertical direction or a Z direction. When a plurality of light sources 13 are disposed on the substrate 11, the light sources 13 may be arranged in a second direction Y.

[0029] The substrate 11 may be made of a flexible material, and the flexible substrate may be closely attached to a lamp housing inside a vehicle. The substrate 11 may include a light-transmitting material through which light passes through the upper and lower surfaces. The light-transmitting material may include at least one of PET (Polyethylene terephthalate), PS (Polystyrene), and PI (Polyimide).

[0030] A reflective layer (not shown) is disposed on the substrate 11. The reflective layer is disposed between the substrate 11 and the light guide unit 15 and can reflect incident light. The reflective layer may include a metallic material or a non-metallic material. The metallic material may include metals such as aluminum, silver, and gold. The non-metallic material may include a plastic material or a resin material.

[0031] In the lighting module 10, the width of the substrate 11 in the first direction X may be larger than the width D1 of the upper part of the lighting module 10. The width of the substrate 11 in the first direction X may be larger than the width D1 of the lighting module 10. Here, the width of the lighting module 10 may be the width of the upper part of the light guiding unit 15 or the width of the upper part of the diffusion layer 17.

[0032] The light source 13 is disposed between the substrate 11 and the light guide 15 and emits light through an upper surface or through an upper surface and a side surface. A plurality of light sources 13 are arranged along the length direction of the substrate 11 or along a second direction Y. The light sources 13 are disposed under the light guide 15 and may be arranged in one row or two rows along the length direction of the lighting module 10. The light source 13 is embedded in the light guide 15. That is, the light guide 15 seals the light source 13. The upper surface of the light source 13 is disposed above the lower surface of the light guide 15, and a plurality of side surfaces and the upper surface of the light source 13 may contact the light guide 15.

[0033] The light source 13 emits light having the highest intensity in a third direction Z or an optical axis direction. The light source 13 is electrically connected to the substrate 11 and is provided as an LED chip or a package in which a surface of the LED chip is covered with resin. The light source 13 may include a package in which a light emitting chip is packaged as a light emitting element having a light emitting diode (LED). The light emitting chip may emit at least one of blue, red, green, ultraviolet (UV), or infrared light, and the light source 13 may emit at least one of white, blue, red, green, or infrared light, and may emit light in a color such as white, blue, or green.

[0034] The light guiding unit 15 is disposed on a part of an upper surface of the substrate 11. A lower surface of the light guiding unit 15 may face or be in contact with the substrate 11. A width D1 of the light guiding unit 15 in the first direction X may be the same as a width of the lighting module 100 or may be smaller than a width of the substrate 11 in the first direction X. When a reflective layer is disposed on an upper surface of the substrate 11, the light guiding unit 15 may be in contact with the reflective layer.

[0035] The length of the light guiding unit 15 in the second direction Y may be equal to or smaller than the length of the substrate 11 in the second direction. The length of the light guiding unit 15 in the second direction Y may be equal to the length of the lighting module 10 or may be 80% or more of the length of the lighting module 10 or the substrate 11. Such a light guiding unit 15 is extended long in the length direction, so that surface light having a line width can be provided through the lighting module 10. The length of the light guiding unit 15 in the second direction Y may be twice or more, for example, in a range of 2 to 200 times or 50 to 200 times, of the width D1 in the first direction X. The width of the light guiding unit 15 in the first direction X may be 7 mm or less, for example, in a range of 3 mm to 7 mm or 4 mm to 6.5 mm.

[0036] The area of ​​a bottom surface of the light guiding unit 15 may be smaller than the area of ​​an upper surface of the substrate 11. Both sides of the light guiding unit 15 are disposed outside both sides of the light source 13. Thus, the light guiding unit 15 can seal the light source 13, prevent moisture from penetrating, and sufficiently diffuse light. Here, an outer region of the upper surface of the substrate 11 can be exposed from the bottom surface of the light guiding unit 15.

[0037] The height or thickness T4 of the light guiding unit 15 may be 80% or more of the height T1 from the lower surface of the substrate 11 to the upper surface of the diffusion layer 17. That is, the thickness T4 of the light guiding unit 15 may have a height that is 80% or more and less than 100% of the height T1 of the lighting module 10. Thus, the light guiding unit 15 can guide the light emitted from the light source 13 in an emission direction, thereby improving the light diffusion efficiency.

[0038] Both side surfaces in the length direction of the light-guiding unit 15, i.e., the long side surfaces, may be provided as vertical planes. A coating layer made of a reflective material may be formed on both side surfaces of the light-guiding unit 15. The coating layer made of the reflective material may reflect the incident light toward the output side, thereby reducing light loss.

[0039] The light guide 15 may be made of a transparent material. The light guide 15 may include a resin material such as silicone or epoxy. The light guide 15 may include a thermosetting resin material, and may selectively include, for example, PC, OPS, PMMA, PVC, etc. The light guide 15 may be made of glass, but is not limited thereto. For example, the main material of the light guide 15 may be a resin material having urethane acrylate oligomer as a main raw material.

[0040] The light guide 15 is a resin layer that guides light, and therefore can be thinner than a glass material and can be a flexible plate. The light guide 15 can emit point light emitted from the light source 13 as a line light or a surface light having a line width.

[0041] The light guide unit 15 may include beads (not shown), which may diffuse and reflect incident light to increase the amount of light. The beads may be made of any one selected from silicon, silica, glass bubbles, PMMA (Polymethyl methacrylate), urethane, Zn, Zr, Al2O3, and acrylic. The light guide unit 15 may protect the light source 13 therein and reduce loss of light emitted from the light source 13. The light source 13 may be overlapped with an exit surface of the light guide unit 15 in a vertical direction.

[0042] The diffusion layer 17 is disposed on the light guide unit 15. The diffusion layer 17 can diffuse the light incident from the light guide unit 15. The diffusion layer 17 can include a diffusion agent therein, and the diffusion agent can include at least one of Al2O3, TiO2, SiO2, ZnO, and ZrO2. The diffusion layer 17 can be made of a transparent resin or a semi-transparent resin material. The diffusion agent in the diffusion layer 17 can have a content of 8 wt% or more, for example, in a range of 8 wt% to 20 wt%, and if the content is less than the range, hot spots occur, and if the content is more than the range, light extraction efficiency decreases.

[0043] The thickness T5 or height of the diffusion layer 17 may be smaller than the thickness T4 or height of the light guiding part 15, or may be less than 50% of the thickness T4 of the light guiding part 15. The thickness T5 or height of the diffusion layer 17 may be 1.5 mm or less, for example, in the range of 0.8 mm to 1.5 mm. When the diffusion layer 17 is in the above range, the diffusion effect can be improved and a decrease in luminous intensity can be suppressed.

[0044] A lower surface of the diffusion layer 17 is attached to an upper surface of the light guide 15 and extends along the light guide 15. A width of the diffusion layer 17 in a first direction may be equal to or smaller than a width D1 of the light guide 15 in the first direction, and a length of the diffusion layer 17 in a second direction may be equal to or smaller than a length of the light guide 15 in the second direction. Since the diffusion layer 17 is disposed on the upper part of the lighting module 10, a problem of hot spots occurring on the upper part of the light source 13 can be suppressed.

[0045] The upper surface of the diffusion layer 17 may have a convex curved surface, for example, a corner portion between the upper surface and the side surface of the diffusion layer 17 may have a curved surface.

[0046] Here, the upper surface of the light guide portion 15 is provided as a flat or horizontal surface, and the upper surface of the diffusion layer 17 is provided as a convex curved surface, so that the incident light can be transmitted to a wide area of ​​the incident surface 53 of the optical lens 51.

[0047] The optical lens 51 is disposed on the lighting module 10. The optical lens 51 is disposed on the diffusion layer 17 of the lighting module 10. The optical lens 51 may include an incident surface 53 and an exit surface 55. A part of the incident surface 53 faces the lighting module 10, and the light emitted from the lighting module 10 is incident thereon. The incident surface 53 may be a curved surface concave in the minor axis direction, a convex curved surface, or a horizontal plane. The exit surface 55 may refract the light incident through the incident surface 53 when it is guided through the inside. The exit surface 55 may irradiate with parallel light or condense light. The exit surface 55 may be provided in a convex hemispherical shape or a bullet shape. As another example, the exit surface 55 may include a Fresnel lens pattern. The optical lens 51 may be a condenser lens, a parallel light lens, a collimator lens, or a Fresnel lens.

[0048] The incident surface 53 of the optical lens 51 may be disposed on the upper portion of the light guide unit 15 and may face the upper surface of the diffusion layer 17. The incident surface 53 may be spaced apart from the upper surface of the diffusion layer 17. Since the incident surface 53 of the optical lens 51 is spaced apart from the upper surface of the diffusion layer 17, the light diffused through the diffusion layer 17 may be incident on a wide area of ​​the incident surface 53. A distance G1 between the incident surface 53 and the diffusion layer 17 may be 0.01 mm or more, for example, in the range of 0.01 mm to 0.5 mm. Here, the width D2 of the incident surface 53 is the lower surface width of the optical lens 51 and may be larger than the upper width D1 of the lighting module 10, and may be 1.5 times or more, for example, in the range of 1.5 times to 10 times or 2 times to 10 times, of the upper width D1 of the lighting module 10. The maximum width D2 in the first direction X of the optical lens 51 may be smaller than or different from the height T2. When the maximum width D2 in the first direction X of the optical lens 51 is greater than the height T2, the luminous intensity decreases and the line width increases. When the maximum width D2 in the first direction X of the optical lens 51 is smaller than the height T2, the luminous intensity increases and the line width decreases. Thus, the maximum width D2 and height T2 in the first direction X of the optical lens 51 can be adjusted to match the light distribution image.

[0049] The length of the optical lens 51 in the second direction Y may be equal to or greater than the length of the lighting module 10. Thus, when viewed from the outside of the lighting device 100, the surface of the optical lens 51 is exposed, and the upper structure of the lighting module 10 is not exposed.

[0050] The optical lens 51 may include a light-transmitting material, and may selectively include, for example, PC, OPS, PMMA, PVC, etc. The optical lens 51 may include a resin material such as silicone or epoxy, or a thermosetting material. The refractive index of the optical lens 51 may be in the range of 1.4 to 1.6. Since the optical lens 51 has the above-mentioned material and refractive index, it is possible to refract the incident light toward the target without loss. The optical lens 51 may emit a surface light having a line width of 30 mm or less in the first direction X and a long length in the second direction Y. As a result, the external image of the lighting device 100 is provided as an image having the line width. That is, as shown in FIG. 21, it is possible to emit an image having a line width.

[0051] As shown in (A)-(C) of FIG. 4, the optical lens 51 may have a concave curved shape based on the length direction, a convex curved shape, or one end and the other end of the optical lens 51 may have a shape twisted in opposite directions.

[0052] 4A, the incident surface 53A of the optical lens 51 has a convex curved surface having a first radius of curvature in the minor axis direction, (B) the incident surface 53B has a convex curved surface having a second radius of curvature larger than the first radius of curvature in the minor axis direction, and (C) the incident surface 53C has a concave curved surface having a third radius of curvature in the minor axis direction. The first and second radii of curvature may have a difference of 20 mm or more, a positive radius of curvature, and the third radius of curvature may have a negative radius of curvature, and may have a difference of 20 mm or more from the first radius of curvature in absolute value. The first radius of curvature may be 50 mm or more, and the second and third radii of curvature may be less than 50 mm, and may be the same as each other or may have a difference of 5 mm or less.

[0053] The lighting device 100 may include at least one or both of a housing 31 and a reflective member 40 to be coupled to a moving body such as a vehicle. The housing 31 may support the lighting module 10 and the reflective member 40. The housing 31 supports a lower surface of the substrate 11 of the lighting module 10, and both side extensions 32 and 33 extending in a width direction support an outer lower portion of the reflective member 40. The housing 31 may be a heat dissipation member.

[0054] The reflective member 40 has an insertion hole R1 therein and includes first and second bottom parts 41 and 41A disposed on both sides of the substrate 11. The first and second bottom parts 41 and 41A are connected to each other on both short sides in the length direction of the lighting module 10. The reflective member 40 includes first and second reflecting parts 42 and 43 on both sides of the insertion hole R1, and the first and second reflecting parts 42 and 43 have the insertion hole R1 therein and may protrude toward the incident surface 53 from the inside of the first and second bottom parts 41 and 41A. The width of the insertion hole R1 in the first direction X may be smaller than the length of the second direction Y. The width of the insertion hole R1 in the first direction may correspond to the width of the light guiding part 15 in the first direction, and the length of the insertion hole R1 in the second direction may correspond to the length of the light guiding part 15 in the second direction. The insertion hole R1 has a line shape in top view.

[0055] The first and second reflecting parts 42 and 43 are disposed on both long sides of the light guide part 15. The first and second reflecting parts 42 and 43 extend to both sides of the insertion hole R1. Thus, the first and second reflecting parts 42 and 43 can reflect light incident on both long sides of the light guide part 15 and cause the light to re-enter the light guide part 15. The first and second reflecting parts 42 and 43 are connected to each other on both short sides of the light guide part 15 in the length direction.

[0056] The reflective member 40 includes a recess C0 that is recessed in a concave shape, and the recess C0 may include an area that is lower than the incident surface 53 of the optical lens 51. The recess C0 is provided with a center distance of a gap G1 between the diffusion layer 17 and the incident surface 53. The gap G1 is a vertical distance, and the width of the area having the gap G1 may be smaller than the width of the lower surface of the diffusion layer 17 in the first direction X, and the length may be the same as the length of the diffusion layer 17 in the second direction Y.

[0057] A height G4 of the upper ends of the first and second reflecting parts 42 and 43 is a height at the bottom surfaces of the recessed first and second grooves C1 and C2, and is disposed higher than an upper end of the light guide part 15. This allows the first and second reflecting parts 42 and 43 to reflect light leaking through a side surface of the light guide part 15, thereby improving the light extraction efficiency of the lighting module 10. The first and second grooves C1 and C2 may be disposed on both sides of the recess C0. The first and second grooves C1 and C2 may be disposed on both sides of the recess C0 in the first direction X. The first and second grooves C1 and C2 may be disposed on both sides of the recess C0 in the first and second directions.

[0058] The height G4 of the upper ends of the first and second reflecting parts 42 and 43 of the reflecting member 40 may be arranged lower than the upper end of the diffusion layer 17. That is, the interval G2 between the first and second reflecting parts 42 and 43 and the incident surface 53 may be larger than the interval G1 between the diffusion layer 17 and the incident surface 53. As a result, the first and second reflecting parts 42 and 43 reflect the light incident through the side surface of the light guide part 15, and enable the light to be emitted through the side surface of the diffusion layer 17. In addition, the upper surfaces of the first and second reflecting parts 42 and 43 can reflect the light emitted through the diffusion layer 17 to the incident surface 53 of the optical lens 51.

[0059] The reflecting member 40 includes first and second lens supporting parts 45 and 46, which are disposed along the outer edge of the optical lens 51. The first and second lens supporting parts 45 and 46 have step structures 45A and 46A recessed inward from the upper ends, and the step structures 45A and 46A support the outer edge of the optical lens 51. As shown in FIG. 3, the first and second lens supporting parts 45 and 46 may further include step structures 45B and 46B supporting the outer edge of the optical lens 51 at their short sides.

[0060] The upper ends of the first and second lens support parts 45 and 46 are disposed higher than the lower end or outer edge of the incident surface 53 of the optical lens. Thus, the lower end edge of the optical lens 51 is coupled along the inner upper end of the first and second lens support parts 45 and 46. At this time, the lower end edge of the optical lens 51 is bonded to the step structures 45A and 46A with an adhesive. The height G3 of the step structures 45A and 46A may be smaller than the height to the upper ends of the first and second lens support parts 45 and 46 and larger than the height to the upper surface of the diffusion layer 17. The height G4 from the substrate 11 to the step structures 45A and 46A is located higher than the upper surface position of the diffusion layer 17, so that the incident surface 53 of the optical lens 51 and the diffusion layer 17 can be spaced apart.

[0061] A width D3 in the first direction X of the reflective member 40 may be greater than a lower end width D2 of the optical lens 51. A height T3 from a lower surface of the substrate 11 to an upper end of the optical lens 51 may be equal to or greater than the width D3 in the first direction of the reflective member 40. In this case, the optical lens 51 may have a hemispherical exit surface. As another example, a height T3 from a lower surface of the substrate 11 to an upper end of the optical lens 51 may be equal to or smaller than the width D3 in the first direction of the reflective member 40. In this case, an exit surface 55 of the optical lens 51 may include a Fresnel lens pattern.

[0062] The reflective member 40 includes first and second recesses R2 and R3 at the bottom of the bottom surface, and the upper part of the housing 31 is received or coupled to the second recess R3. The first recess R2 is included inside the second recess R3, and the substrate 11 is inserted or received in the first recess R2. The first recess R2 has a depth from the second recess R3 that is equal to or greater than the thickness of the substrate 11, so that the lower surface of the substrate 11 does not protrude outside the first recess R2. The substrate 11 is attached to the housing 31 with an adhesive or attached to the reflective member 40 within the first recess R2.

[0063] The width of the first recess R2 may be smaller than the width of the second recess R3, and the width of the second recess R3, which is the upper width of the housing 31, is equal to or is 80% or more of the lower width D2 of the optical lens 51, so that the housing 31 can be supported at the lower part of the lighting device 100. As another example, when the housing 31 is a heat dissipation member made of a metal or non-metallic material, it can effectively dissipate heat transferred from the substrate 11. The upper ends of the extensions 32 and 33 on both sides of the housing 31 contact or are coupled to the lower ends on both sides of the reflective member 40, so that the reflective member 40 can be prevented from moving or tilting downward.

[0064] The reflecting member 40 may include a first groove C1 on one side of the recess C0 and a second groove C2 on the other side. The first groove C1 is disposed to be recessed between the first reflecting part 42 and the first lens support part 45, and the second groove C2 is disposed to be recessed between the second reflecting part 43 and the second lens support part 46. The width D4 of each of the first and second grooves C1 and C2 is disposed in an area equal to or larger than the width D1 of the light guide part 15, and the surfaces of the first and second grooves C1 and C2 may reflect light reflected by the incident surface 53 of the optical lens 51. The first and second grooves C1 and C2 are extended long along the long side of the light guide part 15 and connected to each other on the short side of the light guide part 15.

[0065] For the explanation of Figs. 6 to 8, the optical lenses are defined as first to sixth lenses. Fig. 6 (A) shows the shape of a first lens having a convex entrance surface and a convex exit surface with a first radius of curvature, and Fig. 6 (B) shows the shape of a second lens having a convex entrance surface and a convex exit surface with a second radius of curvature. Fig. 7 (A) shows the shape of a third lens having a concave entrance surface and a convex exit surface with a third radius of curvature, and Fig. 7 (B) shows the shape of a fourth lens having a flat entrance surface and an exit surface with a Fresnel lens pattern. Fig. 8 (A) shows a fifth lens having a flat entrance surface and a convex exit surface, and Fig. 8 (B) shows the shape of a sixth lens that is the same as the fifth lens but made of a different material.

[0066] The first to fifth lenses are made of PMMA, and the sixth lens is made of PC. The difference between the first and second radii of curvature is less than 20 mm, the first radius of curvature is 50 mm or more, for example, in the range of 50 mm to 90 mm, and the second radius of curvature may be less than 50 mm, for example, in the range of 10 mm to 49 mm. The third radius of curvature has a negative radius of curvature, and is smaller than the first lens radius by 20 in absolute value, and may be less than 50 mm, for example, in the range of 10 mm to 49 mm.

[0067] The luminous intensity of the third lens may be greater than that of the first, second, fourth, fifth and sixth lenses, and the luminous intensity of the second lens may be the smallest. It can be seen that the luminous intensity of the sixth lens is lower than that of the first, third, fourth and fifth lenses. This shows that when an optical lens is made of PMMA material, has a concave entrance surface or a flat entrance surface, and a convex exit surface, the luminous intensity is high.

[0068] 6 to 8, when the lighting device disclosed above is applied to the front, rear, side or inside of a moving body, 10U (Up) is a view viewed from 10 degrees above, 5U (Up) is a view viewed from 5 degrees above, HV is a view viewed from the intersection point of the horizontal and vertical positions, and 10L (Left), 20L, 40L, 60L, and 80L are views viewed from the left side at 10 degrees, 20 degrees, 40 degrees, 60 degrees, and 80 degrees, respectively, based on the intersection point where the horizontal and vertical intersect with the lighting device of the moving body.

[0069] 6 to 8, the light distribution image in 10U (Up) shows that the light distribution of the first lens, the third lens, the fifth lens, and the sixth lens is uniform. The light distribution image in 5U (Up) shows that the light distribution of the first lens, the third lens, the fourth lens, and the fifth lens is uniform. The light distribution image in HV shows that the fourth lens, the fifth lens, and the sixth lens have a uniform distribution, and the light distribution images in 10L (Left), 20L, 40L, 60L, and 80L show that the fourth lens and the fifth lens have a more uniform distribution than the other lenses. Therefore, the first, third, or fifth lens shows a light distribution image and a higher luminous intensity than the other lenses. This is because a lens having a concave or convex entrance surface with a curvature radius in the width direction of less than 50 and a convex exit surface can be used to provide a uniform distribution of the light distribution image.

[0070] When comparing the luminance when the lighting module width is 3mm and 4mm, it can be seen that the luminance at 3mm width is higher than the luminance at 4mm width at HV point and its surroundings (H5L, H5R). When comparing the luminance when the lighting module height is 6mm and 5mm, it can be seen that the luminance is above the standard value in the entire area when the height is 5mm and 6mm. When comparing the luminance when the lighting module height is 7mm and 4mm, it can be seen that the luminance is above the standard value in the entire area for each lighting module, even though there is a difference in the height of the lighting module.

[0071] A modified example of Fig. 1 will be described below, but the configuration of the modified example may selectively be the same as the configuration of the embodiment disclosed above, and the duplicated description will be omitted. Such a lighting module may have a flexible characteristic according to the flexible characteristic of the optical lens, and may selectively include the housing configuration disclosed in Fig. 1.

[0072] Fig. 9 is a first modified example of the side cross-sectional view of the lighting device of Fig. 1, Fig. 10 is a partial enlarged view of Fig. 9, Fig. 11 is a diagram showing a light distribution image according to each direction or position on the optical lens of Fig. 9, and Fig. 12 is a diagram showing the luminous intensity of the lighting device of Fig. 9. Referring to Figs. 9 and 10, a lighting device 100A includes a lighting module 10 and an optical lens 51. The lighting module 10 includes a substrate 11, light sources 13 arranged on the substrate 11, and a light guide unit 15 covering the light sources 13. The lighting module 10 may further include a diffusion layer 17 on the light guide unit 15.

[0073] The width D1 of the light guiding unit 15 in the first direction X may be equal to the bottom width and the top width. The diffusion layer 17 is disposed on the light guiding unit 15 and may be spaced apart from the incident surface 53 of the optical lens 51 by a predetermined distance G1.

[0074] The diffusion layer 17 may have an upper width D5 in the first direction X smaller than a lower width (e.g., D1). By making the upper width D5 of the diffusion layer 17 in the first direction X narrower than the lower width, the diffusion layer 17 can provide higher luminous intensity. Also, by making the upper width of the diffusion layer 17 narrower than the lower width, hot spots in the light emitted through the optical lens 51 can be prevented. That is, when the upper width of the diffusion layer 17 is the same as the lower width, the light emitted to the edge portion of the diffusion layer 17 in the first direction is emitted as a surface light image through the optical lens 51, and at this time, hot spots may occur along one side or edge of the surface light image. Therefore, in the modified example of the invention, the upper width of the diffusion layer 17 is made narrower than the width of the light guide 15, so that hot spots caused by light proceeding to the edge of the diffusion layer 17 can be prevented.

[0075] A thickness T51 of a first region 17B having a lower width D1 in the diffusion layer 17 may be smaller than a thickness T52 of a second region 17C having a width smaller than the lower width D1. The first region 17B is a region bonded to an upper surface of the light guiding unit 15, and the second region 17C may include at least one of a surface inclined from an upper end of the first region 17B, a curved surface, or a surface with a vertical step. Preferably, an outer region of the second region 17C may include a sloped surface or a curved surface.

[0076] The upper surface 17A of the diffusion layer 17 is provided as a flat surface or the highest surface between both upper ends of the second region 17C. As another example, the upper surface 17A of the diffusion layer 17 may be provided with an uneven structure. The upper width D5 of the diffusion layer 17 may be a width of an area exposed to the upper portion R11 of the through hole R1 and may be larger than the width D6 of the upper surface 17A. In addition, since the width D6 of the upper surface 17A of the diffusion layer 17 is provided smaller than the width (i.e., D5) of the upper portion R11 of the through hole R1 of the second region 17C, the light proceeding to the lower surface edge of the diffusion layer 17 can be guided in the center direction or the optical axis direction. The width D1 of the light guide portion 55 may be 7 mm or less, for example, in the range of 3 mm to 7 mm or in the range of 4 mm to 6.5 mm. The lower surface width of the diffusion layer 17 may be 7 mm or less, for example, in the range of 3 mm to 7 mm or in the range of 4 mm to 6.5 mm. The upper width D5 of the diffusion layer 17 may be 6 mm or less, for example, in the range of 3 mm to 6 mm or 4 mm to 5.5 mm. The upper surface width D6 of the diffusion layer 17 may have a difference of 1 mm or less from the upper width D5.

[0077] The width D2 in the first direction X of the incident surface 53 of the optical lens 51 may be 1.5 times or more, for example, in the range of 1.5 to 2.5 times or 1.7 to 2.3 times, of the top width D5 of the lighting module 10 or the top width D5 of the diffusion layer 17. This is because the width D2 of the incident surface 53 of the optical lens 51 can be reduced by reducing the top width D5 of the diffusion layer 17. The width D2 in the first direction X of the incident surface 53 of the optical lens 51 may exceed 5 mm.

[0078] The lighting device 100A may include at least one or both of a housing (31 in FIG. 1) and a reflective member 40 for coupling to a moving body such as a vehicle. The housing (31 in FIG. 1) may support the lighting module 10 and the reflective member 40.

[0079] The reflective member 40 includes a recess C0 that is recessed in an upper portion, and the recess C0 may include an area that is lower than the incident surface 53 of the optical lens 51. The recess C0 is provided with a center distance of a gap G1 between the diffusion layer 17 and the incident surface 53. The gap G1 is a vertical distance, and the width of the area having the gap G1 may be smaller than the width of the lower surface of the diffusion layer 17 in the first direction X, and the length may be the same as the length of the diffusion layer 17 in the second direction Y.

[0080] The reflective member 40 may have an insertion hole R1 therein and may include first and second reflecting parts 42A and 43A on both sides of the insertion hole R1. The first and second reflecting parts 42A and 43A may have the insertion hole R1 therein and may protrude toward the incident surface 53 of the optical lens 51. The width of the insertion hole R1 in the first direction X may be smaller than the length of the insertion hole R1 in the second direction Y. The width of the insertion hole R1 in the first direction may correspond to the width of the light guiding part 15 in the first direction, and the length of the insertion hole R1 in the second direction may correspond to the length of the light guiding part 15 in the second direction. The insertion hole R1 has a line shape that is long in the second direction when viewed from above.

[0081] The first and second reflecting parts 42A and 43A are disposed on both long sides of the light guide part 15. The first and second reflecting parts 42A and 43A extend to both sides of the insertion hole R1. Thus, the first and second reflecting parts 42A and 43A can reflect light incident on both long sides of the light guide part 15 and cause the light to re-enter the light guide part 15. The first and second reflecting parts 42A and 43A are connected to each other on both short sides of the light guide part 15 in the length direction.

[0082] An upper width (i.e., D5) of the insertion hole R1 in the first direction X may be smaller than a lower width (e.g., D1). Here, the reflective member 40 may include a first protrusion P1 and a second protrusion P2 protruding inward from an upper end of the insertion hole R1. The first protrusion P1 extends from an upper end of one side of the first region 17B of the diffusion layer 17 to be inclined inward. The second protrusion P2 extends from an upper end of the other side of the first region 17B of the diffusion layer 17 to be inclined inward.

[0083] The second region 17C of the diffusion layer 17 may be exposed in a region between the first and second protrusions P1 and P2. The upper surface 17A of the diffusion layer 17 may be flush with the upper surfaces of the first and second protrusions P1 and P2 or may be disposed within a range of 0.5±mm based on the upper surfaces of the first and second protrusions P1 and P2. The protrusion length D7 of each of the first and second protrusions P1 and P2 may be a distance between a straight line extending from an inner side surface to a side surface of the light guide unit 15 and may be in a range of 0.5±0.1mm. The upper width of the diffusion layer 17 may be reduced by using the protrusion length D7, thereby preventing hot spots.

[0084] The inner surfaces of the first and second protrusions P1 and P2 may include an inclined surface or a concave curved surface. The minimum distance between the first and second protrusions P1 and P2 may be greater than the top width D6 of the diffusion layer 17 and may be equal to the top width D5 of the diffusion layer 17. The minimum distance between the first and second protrusions P1 and P2 may be a width for exposing the top of the diffusion layer 17, which is a width for exposing the second region 17C to the top R11 of the insertion hole R1.

[0085] The reflecting member 40 has first and second lens support parts 45 and 46 on both sides of the recess C0, and has a structure that can eliminate the first and second grooves C1 and C2 disclosed in Fig. 1. The entire area of ​​the recess C0 of the reflecting member 40 faces the incident surface 53 of the optical lens 51 at a constant interval, thereby reducing light loss within the recess C0.

[0086] The first lens support part 45 may extend or protrude to an upper part of the first reflecting part 42A, and the second lens support part 46 may extend or protrude to an upper part of the second reflecting part 43A.

[0087] The width D2 in the first direction X of the incident surface 53 of the optical lens 51 may be greater than the height T2. The length in the second direction Y of the incident surface 53 of the optical lens 51 may be greater than the width D2, and the lengths of the incident surface 53 and the exit surface 55 in the second direction may be the same. As another example, the length of the incident surface 53 in the second direction may be greater than the length of the exit surface 55.

[0088] As shown in Fig. 11, when the lighting device of Fig. 9 is applied to the front, rear, side or inside of a moving object, 2U(Up) is a view seen from 2 degrees above, 10U(Up) is a view seen from 10 degrees above, 20U(Up) is a view seen from 20 degrees above, and HV is a view seen from the intersection point of the horizontal and vertical positions based on the lighting device of the moving object. As shown in these figures, the lighting device is provided as a line image having a certain width, and the line width can be smaller when viewed from 10 degrees or 20 degrees above than when viewed from 2 degrees. As shown in Fig. 12, it can be seen that the difference between the center brightness and the edge brightness of the lighting device of Fig. 9 is small, and the full width at half maximum (FWHM) of the brightness is 40 degrees or more, for example, about 45±2 degrees.

[0089] Fig. 13 is a side cross-sectional view showing a second modified example of the lighting device of Fig. 1, Fig. 14 is a diagram showing light distribution images according to various directions or positions on the optical lens of Fig. 13, and Fig. 15 is a diagram showing the luminous intensity of the lighting device of Fig. 13. The second modified example is structurally the same as the first modified example, and is an example in which the width of the entrance surface 51 of the optical lens 51 is increased.

[0090] 13, the lighting device 100A includes a lighting module 10 and an optical lens 51. The lighting module 10 includes a substrate 11, light sources 13 arranged on the substrate 11, and a light guide 15 covering the light sources 13. The lighting module 10 may further include a diffusion layer 17 on the light guide 15.

[0091] The width D1 in the first direction X of the light guiding unit 15 may be the same as the bottom width and the top width. The diffusion layer 17 is disposed on the light guiding unit 15 and may be spaced apart from the incident surface 53 of the optical lens 51 by a predetermined distance G1. The width D2 in the first direction X of the incident surface 53 of the optical lens 51 may exceed 10 mm and may be 2.5 times or more, for example, in the range of 2.5 to 3.5 times, of the upper width D5 of the diffusion layer 17.

[0092] The lighting device 100A may include at least one or both of a housing (31 in FIG. 1) and a reflective member 40 for coupling to a moving body such as a vehicle. The housing (31 in FIG. 1) may support the lighting module 10 and the reflective member 40.

[0093] As shown in Fig. 14, when the lighting device of Fig. 13 is applied to the front, rear, side or inside of a moving object, 2U(Up) is a view seen from 2 degrees above, 10U(Up) is a view seen from 10 degrees above, 20U(Up) is a view seen from 20 degrees above, and HV is a view seen from the intersection point of the horizontal and vertical positions based on the lighting device of the moving object. As shown in these figures, the lighting device is provided as a line image having a certain width, and the line width can be smaller when viewed from 10 degrees or 20 degrees above than 2 degrees. As shown in Fig. 15, the luminance of the lighting device of Fig. 13 shows a small difference between the center luminance and the edge luminance, and the full width at half maximum (FWHM) of the luminance is less than 40 degrees, for example, about 34±2 degrees.

[0094] Fig. 16 is a side cross-sectional view showing a third modified example of the lighting device of Fig. 1, Fig. 17 is a drawing showing a light distribution image according to each direction or position on the optical lens of Fig. 16, and Fig. 18 is a drawing showing the luminous intensity of the lighting device of Fig. 16. The third modified example is structurally the same as the first modified example, and has a configuration in which the width of the incident surface 51 of the optical lens 51 is increased, and is an example in which the shape of the reflective member 40 is changed due to the increase in the width of the incident surface 51 of the optical lens 51.

[0095] 16, the lighting device 100A includes a lighting module 10 and an optical lens 51. The lighting module 10 includes a substrate 11, light sources 13 arranged on the substrate 11, and a light guide 15 covering the light sources 13. The lighting module 10 may further include a diffusion layer 17 on the light guide 15.

[0096] The width D1 in the first direction X of the light guiding unit 15 may be equal to the bottom width and the top width. The diffusion layer 17 is disposed on the light guiding unit 15 and may be spaced apart from the incident surface 53 of the optical lens 51 by a predetermined distance G1. The width D2 in the first direction X of the incident surface 53 of the optical lens 51 may be greater than 15 mm and less than 25 mm, and may be 3.5 times or more, for example, in the range of 3.5 to 4.5 times, of the upper width D5 of the diffusion layer 17.

[0097] The lighting device 100A may include at least one or both of a housing (31 in FIG. 1) and a reflective member 40 for coupling to a moving body such as a vehicle. The housing (31 in FIG. 1) may support the lighting module 10 and the reflective member 40.

[0098] As shown in FIG. 17, when the lighting device of FIG. 16 is applied to the front, rear, side or inside of a moving object, 2U(Up) is a view seen from 2 degrees above, 10U(Up) is a view seen from 10 degrees above, 20U(Up) is a view seen from 20 degrees above, and HV is a view seen from the intersection point of the horizontal and vertical positions based on the lighting device of the moving object. As shown in these figures, the lighting device is provided as a line image having a certain width, and the line width may be smaller when viewed from 2 degrees above than when viewed from 10 degrees above, and the line width may be smaller than 50% above 20 degrees. As shown in FIG. 18, the luminance of the lighting device of FIG. 16 shows a small difference between the center luminance and the edge luminance, and the full width at half maximum (FWHM) of the luminance is less than 30 degrees, for example, about 27±2 degrees. FIG. 19A shows the light uniformity when the height of the lighting module disclosed above is 7 mm, and FIG. 19B shows the light uniformity when the height of the lighting module is 4 mm. Both are 120000 cd / m 2 It can be seen that it is expressed as

[0099] FIG. 20 is a plan view of a vehicle to which a lighting device according to an embodiment of the present invention is applied, and FIG. 21 is a diagram showing an example of a tail light of the vehicle of FIG.

[0100] 20 and 21, in a moving body or vehicle 2000, a front lamp 2100 may include one or more lighting modules, and the driving time of these lighting modules may be individually controlled to provide not only a function as a normal headlight but also an additional function such as a welcome light or a celebration effect when a driver opens a vehicle door. The lamp may be applied to a daytime running light, a high beam, a low beam, a fog lamp, or a turn signal light. In a vehicle 2000, a tail lamp 2200, 800 is provided with a number of lamp units 810, 812, 814, 816 supported by a housing. For example, the lamp units 810, 812, 814, 816 may include a first lamp unit 810 arranged on the outside, a second lamp unit 814 arranged around the inside of the first lamp unit 810, and third and fourth lamp units 814, 816 arranged inside the second lamp unit 814, respectively. The first to fourth lamp units 810, 812, 814, and 816 may selectively adopt the lighting device disclosed in the embodiment, and a red lens cover or a white lens cover may be disposed on the outside of the lighting device for the lighting characteristics of the lamp units 810, 812, 814, and 816. The lighting device disclosed in the embodiment applied to the lamp units 810, 812, 814, and 816 may emit surface light with a uniform distribution.

[0101] The first and second lamp units 810 and 812 may be provided in at least one of a curved shape, a linear shape, an angular shape, an inclined shape, and a flat shape, or a structure that is a mixture of these. One or more of the first and second lamp units 810 and 812 may be disposed in each tail light. The first lamp unit 810 may be provided as a tail light, the second lamp unit 812 as a brake light, the third lamp unit 814 as a backup lamp, and the fourth lamp unit 816 as a turn signal lamp. Such an illumination lamp can provide higher luminous intensity in the rear direction than in the side direction, and therefore can comply with light distribution regulations for stop lamps, tail lamps, etc.

[0102] As shown in FIG. 22, a plurality of the lighting devices 100 may be arranged in front of a vehicle 2000 as daytime running lights, each of which is provided in a line shape having a curved surface.

[0103] The features, structures, effects, etc. described in the above embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to one embodiment. In addition, the features, structures, effects, etc. exemplified in each embodiment can be combined or modified in other embodiments by a person having ordinary skill in the art to which the embodiment belongs. Therefore, the contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

[0104] In addition, the above description has been centered on the embodiments, but these are merely examples and do not limit the present invention. A person having ordinary skill in the art to which the present invention pertains may make various modifications and applications not exemplified above within the scope of the essential characteristics of the present embodiments. For example, each component specifically presented in the embodiments may be modified and implemented. The differences related to such modifications and applications should be interpreted as being included in the scope of the present invention defined in the appended claims.

Claims

1. a substrate having a length in a second direction greater than a width in a first direction; A plurality of light sources arranged on the substrate in a second direction; an illumination module having a light guide disposed on the substrate and the light source; an optical lens disposed on the lighting module, the optical lens having an incident surface having a width greater than a width of the lighting module in a first direction, and an exit surface from which light incident on the incident surface exits; a reflecting member including an insertion hole in which the light guide is disposed, a reflecting portion extending to both sides of the insertion hole and covering both sides of the light guide, and a supporting portion supporting a lower edge of the optical lens, a width of the light guiding portion and the insertion hole in the first direction is smaller than a length of the light guiding portion and an upper end of the reflecting portion is located higher than an upper end of the light guiding portion.

2. The illumination device according to claim 1 , wherein the exit surface of the optical lens refracts light incident on the entrance surface into parallel light.

3. a diffusion layer on the light guide portion for diffusing light, The lighting device according to claim 1 , wherein an upper end of the diffusion layer is positioned higher than an upper end of the reflector.

4. the diffusion layer is spaced apart from an incident surface of the light guiding portion; The lighting device according to claim 3 , wherein a width of the diffusion layer in a first direction is the same as a width of the light guiding portion in the first direction, and a length of the diffusion layer in a second direction is the same as a length of the light guiding portion in the second direction.

5. The illumination device according to claim 1 , wherein the entrance surface is any one of a curved surface recessed in the minor axis direction, a curved surface convex, and a flat surface.

6. The width of the light guiding portion in the first direction is in the range of 3 mm to 7 mm; The lighting device according to claim 1 , wherein a length of the light guiding portion in the second direction is equal to or greater than 50 times a width of the light guiding portion in the first direction.

7. A substrate; A plurality of light sources arranged in one direction on the substrate; an illumination module including a light guide covering the plurality of light sources and having a length greater than a width, and a diffusion layer disposed on the light guide; an optical lens disposed on the lighting module, the optical lens having an incident surface having a width greater than a width of the lighting module, and an exit surface from which light incident on the incident surface exits; a reflecting member including an insertion hole into which the light guide is inserted, a reflecting portion extending to both sides of the insertion hole and disposed around the light guide, and a supporting portion supporting a lower edge of the optical lens, The light guide and the insertion hole have a length that is at least twice as long as their widths, The reflecting portion of the reflecting member is disposed along both long sides and both short sides of the light guiding portion, A lighting device, wherein the lighting module and the optical lens have flexibility in a thickness direction and a width direction of the lighting module relative to the length direction.

8. The lighting device according to claim 7 , wherein an upper end of the reflecting portion is disposed higher than an upper end of the light guiding portion and lower than an upper end of the diffusing layer.

9. The lighting device according to claim 7 , wherein the reflective member has recessed grooves between both outer sides of the inner reflective portion and both inner sides of the outer support portion.

10. a substrate having a length in a second direction greater than a width in a first direction; A plurality of light sources arranged on the substrate in a second direction; a light guiding section disposed on the substrate and covering the plurality of light sources; a diffusion layer disposed on the light guiding portion; an optical lens having an incident surface spaced apart from the diffusion layer and having a width greater than a width of the diffusion layer in a first direction, and an exit surface from which light incident on the incident surface exits; a reflecting member having an insertion hole in which the light guide and the diffusion layer are disposed, first and second reflecting parts covering an extension on both sides of the insertion hole, and supporting parts supporting both end edges of the optical lens, The diffusing layer has an upper width in the first direction that is smaller than a lower width.

11. the diffusion layer includes a first region having a width equal to a width of the light guiding portion, and a second region on the first region having a width smaller than the width of the light guiding portion, The lighting device of claim 10 , wherein an outer surface of the second region of the diffusing layer comprises a curved or inclined surface.

12. The lighting device according to claim 11 , wherein the width of the incident surface of the optical lens in the first direction is in the range of 1.5 to 4.5 times the width of the top of the diffusion layer.

Images