Lighting equipment

Abstract

An illumination device disclosed in an embodiment of the invention includes a substrate, a light source disposed on the substrate, and a light-guiding member disposed on the substrate and the light source, the light-guiding member including an exit surface and a first reflective surface opposite the exit surface, the first reflective surface including a plurality of reflective portions having different heights based on a top surface of the substrate, and each of the plurality of reflective portions including a plurality of first surfaces inclined based on the top surface of the substrate.

Description

[Technical field]

[0001] The embodiments relate to a lighting device having a light source. The embodiments relate to a lighting device that emits light in a pattern shape or matrix shape on a reflective surface. The embodiments relate 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 life, 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 life. Summary of the Invention [Problem to be solved by the invention]

[0003] An embodiment of the invention provides a lighting device having a dot-shaped pattern image. An embodiment of the invention provides a lighting device having an exit surface of a light guide member and a reflective surface in a dot matrix form facing the exit surface. An embodiment of the invention provides a lighting device in which the vertical height between the reflective surface and the exit surface of the light guide member decreases as the distance from the light source increases. An embodiment of the invention provides a lighting device including a light guide member having an exit surface and a reflective surface inclined along a step-shaped difference. An embodiment of the invention provides a lighting device including a light source at a lower side of one side of the light guide member, a primary reflection surface, a secondary reflection surface and an exit surface of the light guide member, and having a dot-shaped pattern or a prism pattern light shape through the exit surface. An embodiment of the invention can provide a vehicle lamp such as a moving body having the above lighting device. [Means for solving the problem]

[0004] An illumination device according to an embodiment of the invention includes a substrate, a light source disposed on the substrate, and a light-guiding member disposed on the substrate and the light source, the light-guiding member including an exit surface and a first reflective surface opposite the exit surface, the first reflective surface including a plurality of reflective portions having different heights based on a top surface of the substrate, and each of the plurality of reflective portions including a plurality of first surfaces inclined based on the top surface of the substrate.

[0005] According to an embodiment of the invention, the plurality of reflecting portions include a first reflecting portion having a first height with respect to an upper surface of the substrate, and a second reflecting portion having a second height greater than the first height, and the first reflecting portion is disposed closer to the light source than the second reflecting portion. The first surface may be inclined at a first angle of 120 degrees or more with respect to a straight line horizontal to the upper surface of the substrate. The first angle may be in the range of 120 degrees to 150 degrees or in the range of 128 degrees to 140 degrees.

[0006] According to an embodiment of the invention, each of the plurality of reflecting portions includes a plurality of inclined second surfaces disposed between the plurality of first surfaces, and the plurality of second surfaces are disposed closer to the light source than the first surfaces. The second surfaces may have an inclination angle equal to an inclination angle of the first surfaces with respect to a straight line horizontal to an upper surface of the substrate. The heights of the first surfaces and the second surfaces may be equal to each other. According to an embodiment of the invention, the plurality of reflecting portions may have a higher height as the reflecting portions are disposed farther from the light source.

[0007] According to an embodiment of the invention, the light guide distance of light horizontally incident on the second reflecting unit via a different reflecting surface from the light source may be greater than the light guide distance of light horizontally incident on the first reflecting unit via a different reflecting surface from the light source, and the light guide distance of light traveling vertically from the first reflecting unit to the exit surface may be greater than the light guide distance of light traveling vertically from the second reflecting unit to the exit surface.

[0008] An illumination device according to an embodiment of the invention includes a substrate, a light source disposed on the substrate, and a light guiding member disposed on the substrate and the light source, the light guiding member including an exit surface and a first reflecting surface opposite the exit surface, the exit surface including a plurality of patterns, the first reflecting surface including a plurality of first surfaces having different heights based on an upper surface of the substrate, and the number of the plurality of patterns may be different from the number of the plurality of first surfaces.

[0009] According to an embodiment of the invention, the number of the plurality of patterns may be greater than the number of the plurality of first surfaces. The plurality of patterns are connected to each other in first and second directions perpendicular to each other.

[0010] According to an embodiment of the invention, the light-guiding member may include a second reflective surface disposed on an upper end of the light source, an upper end of the second reflective surface being connected to one end of the exit surface, and one end of the first reflective surface being connected to the other end of the exit surface. The second reflective surface may overlap the substrate in a vertical direction, the second reflective surface may include a lower reflective portion in an area adjacent to the light source and a convex curved reflective portion on the lower reflective portion, and a distance between the light source and one end of the first reflective surface may be greater than a minimum distance between the light source and the second reflective surface.

[0011] According to an embodiment of the invention, each of the plurality of first surfaces may be inclined, and a thickness of the light-guiding member may be gradually reduced toward a first surface farther from the light source.

[0012] According to an embodiment of the invention, the substrate is disposed on the underside of the light-guiding member, the light source is embedded inside the underside of the light-guiding member, and a pattern on the exit surface of the light-guiding member can vertically overlap the underside of the light-guiding member.

[0013] According to an embodiment of the invention, a portion of the first surface may be formed with a concave-convex pattern. The first surface having the concave-convex pattern may face central portions of upper and lower ends of the second reflecting surface. The pattern of the exit surface corresponding to the first reflecting surface may include a pattern overlapping the first surface in a vertical direction and a pattern overlapping the bottom surface of the first reflecting surface in a vertical direction.

[0014] A vehicle lamp according to an embodiment of the invention includes the lighting device disclosed above, and the lighting device emits a dot-matrix shaped pattern through an emission surface. Effect of the Invention

[0015] According to the lighting device according to the embodiment of the present invention, a dot-type matrix pattern image can be provided, various light distribution images can be provided, and the light uniformity of the pattern image can be improved. In addition, the light distribution of the lighting device can be improved, and lighting images can be provided in various forms.

[0016] In the embodiment of the present invention, the light guide member has reflective surfaces that are corroded to adjust the light reflection intensity of different reflective surfaces, thereby improving the uniformity of the light emitted from the light guide member.

[0017] The optical reliability of the lighting device and the vehicle lamp having the lighting device according to the embodiment of the invention can be improved. The embodiment 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]

[0018] [Figure 1] FIG. 1 is a perspective view of a lighting device according to an embodiment.

[0019] [Diagram 2] 2 is a perspective view showing a first reflecting surface of a light-guiding member in the lighting device of FIG. 1.

[0020] [Diagram 3] 2 is a side cross-sectional view of the lighting device of FIG. 1.

[0021] [Figure 4] 4 is a diagram for explaining first and second reflecting surfaces in the lighting device of FIG. 3.

[0022] [Diagram 5] 4 is a diagram for explaining the inclination angle of a first reflecting surface of the lighting device of FIG. 3.

[0023] [Figure 6] 2 is a rear view of the light-guiding member of the lighting device of FIG. 1.

[0024] [Figure 7] 2 is a side view showing a second reflecting surface of the lighting device of FIG. 1. FIG.

[0025] [Figure 8] 3 is a diagram illustrating a lower portion of a first reflecting surface of the lighting device of FIG. 2.

[0026] [Figure 9] 3 is a diagram illustrating an upper portion of a first reflecting surface of the lighting device of FIG. 2.

[0027] [Figure 10] 4 is a diagram for explaining a traveling path of light in the lighting device of FIG. 3.

[0028] [Figure 11] 3 is a perspective view for explaining a first reflecting surface of the light-guiding member of FIG. 2. FIG.

[0029] [Figure 12] 2 is another example of the lighting device of FIG. 1.

[0030] [Figure 13] FIG. 13 is a partial cross-sectional side view of the lighting device of FIG. 12.

[0031] [Figure 14] 13 is a diagram for explaining a pattern of an emission surface and a reflecting surface of the lighting device of FIG. 12.

[0032] [Figure 15] 2 is another example of the lighting device of FIG. 1.

[0033] [Figure 16] 13 is an example in which a reflecting member is disposed on the second reflecting surface of the lighting device according to the embodiment of the invention.

[0034] [Figure 17] 17A, 17B, and 17C are diagrams illustrating the distribution of light emitted through a pattern on an emission surface in a lighting device according to an embodiment of the present invention.

[0035] [Figure 18] 2 is a diagram for explaining a distribution shape of light emitted by the lighting device of FIG. 1.

[0036] [Figure 19]1 is a diagram comparing a corroded surface and a non-corroded surface of a first reflecting surface in an embodiment of the invention.

[0037] [Figure 20] 4 is a diagram illustrating a distribution of light passing through a light-guiding member according to an embodiment of the present invention;

[0038] [Figure 21] 1 is a diagram showing a lighting device or a lamp having a lighting device according to an embodiment;

[0039] [Figure 22] 22 is an example of a taillight of the vehicle in FIG. 21.

[0040] [Diagram 23] 1 is a diagram showing a pattern of a lighting device according to an embodiment of the invention applied to a vehicle lamp; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0041] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0042] 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.

[0043] 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.

[0044] <Lighting equipment> 1 is a perspective view of an illumination device according to an embodiment, FIG. 2 is a perspective view showing a first reflecting surface of a light-guiding member in the illumination device of FIG. 1, FIG. 3 is a cross-sectional view of the illumination device of FIG. 1 taken along line AA, FIG. 4 is a drawing for explaining first and second reflecting surfaces in the illumination device of FIG. 3, FIG. 5 is a drawing for explaining the first reflecting surface of the illumination device of FIG. 3, FIG. 6 is a rear view of a light-guiding member of the illumination device of FIG. 1, FIG. 7 is a side view showing a second reflecting surface of the illumination device of FIG. 1, and FIG. 8 is a cross-sectional view of the illumination device of FIG. FIG. 10 is a drawing to explain the path of light in the lighting device of FIG. 3; FIG. 11 is a perspective view to explain the first reflecting surface of the light-guiding member of FIG. 2; FIG. 12 is another example of the lighting device of FIG. 1; FIG. 13 is a partial side cross-sectional view of the lighting device of FIG. 12; and FIG. 13 is a drawing to explain the pattern of the exit surface and the reflecting surface of the lighting device of FIG. 12.

[0045] 1 to 13, an illumination device 200 according to an embodiment of the invention includes a light-emitting unit 100 and a light-guiding member 110. The light-emitting unit 100 includes a substrate 101 disposed under the light-guiding member 110 and a light source 102 disposed on the substrate 101.

[0046] The light emitting unit 100 is disposed under one side of the light guiding member 110 and emits light from a lower portion to an upper portion of the light guiding member 110. As another example, the light emitting unit 100 may emit light from one side of the light guiding member 110 to the other side.

[0047] The lighting device 200 may be defined as a light emitting cell with respect to a structure including the light guide member 110, the light source 102, and the substrate 101. In the lighting device 200, a plurality of the light emitting cells may be integrally connected as shown in FIG. 15, or a plurality of the light emitting cells may be arranged in a state where they are partially or entirely separated from each other. Also, the lighting device 200 may have one light emitting cell or a plurality of light emitting cells disposed on the substrate 101. The lighting device 200 may emit light in a reflective structure or matrix shape of a reflective surface 131. The lighting device may provide a lamp having various lighting shapes.

[0048] <Substrate 101> The substrate 101 may include a printed circuit board (PCB). The substrate 101 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 101 is configured as a metal core PCB having a metal layer on the bottom surface, the heat dissipation efficiency of the light source 102 may be improved.

[0049] The substrate 101 is electrically connected to the light source 102. The substrate 101 includes a wiring layer (not shown) on an upper portion thereof, and the wiring layer is electrically connected to the light source 102. When a plurality of light sources 102 are arranged on the substrate 101, the plurality of light sources 102 may be connected in series, in parallel, or in a series-parallel configuration by the wiring layer. The substrate 101 may function as a base member or a support member disposed under the light source 102 and the light guide member 110.

[0050] The upper surface of the substrate 101 may have an XY plane. The upper surface of the substrate 101 may be a flat plane or a curved surface. The thickness of the substrate 101 may be a height in a vertical direction or a Z direction. Here, the X direction may be a first direction, and the Y direction may be a second direction. The Z direction may be a direction perpendicular to the first and second directions. The light source 102 may be disposed on the substrate 101 in a single unit, or may be arranged in a second direction Y when a plurality of light sources are disposed.

[0051] The substrate 101 may be a flexible material, and the flexible substrate may be closely attached to a housing of a lamp in a vehicle. The substrate 101 may include a light-transmitting material through which light is transmitted through an upper surface and a lower surface. The light-transmitting material may include at least one of PET (Polyethylene terephthalate), PS (Polystyrene), and PI (Polyimide). A reflective layer (not shown) is disposed on the substrate 101. The reflective layer is disposed between the substrate 101 and the light-guiding member 110 and may 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.

[0052] <Light source 102> The light source 102 is disposed on the substrate 101 and emits light in a third direction Z from one side of the light-guiding member 110. The light source 102 emits light from one side of the light-guiding member 110 through a side surface different from the top surface.

[0053] The light source 102 is disposed at a lower portion on one side of the light guiding member 110. The light source 102 is disposed inside one side of the light guiding member 110. That is, the light guiding member 110 is disposed on the surface of the light source 102 or seals the light source 102. The upper surface of the light source 102 is disposed above the lower surface S0 of the light guiding member 110, and a number of sides of the light guiding member 110 may be in contact with the light guiding member 110.

[0054] The light source 102 emits light having the highest intensity in a third direction Z. The light source 102 is electrically connected to the substrate 101 and is provided as an LED chip or a package in which a surface of an LED chip is covered with resin. The light source 102 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), and infrared light, and the light source 102 may emit at least one of white, blue, red, green, and infrared light.

[0055] <Light guiding member 110> The light guiding member 110 is disposed on the substrate 101. A lower surface S0 of the light guiding member 110 may face the substrate 101. The light guiding member 110 is disposed on a partial region of the substrate 101. An area of ​​the lower surface S0 of the light guiding member 110 facing the substrate 101 may be equal to or smaller than an area of ​​an upper surface of the substrate 101. The substrate 101 may be disposed under one side of the light guiding member 110.

[0056] The light guide member 110 may be made of a transparent material. The light guide member 110 may include a resin material such as silicone or epoxy. The light guide member 110 may include a thermosetting resin material, and may selectively include, for example, PC, OPS, PMMA, PVC, etc. The light guide member 110 may be made of glass, but is not limited thereto. For example, the main material of the light guide member 110 may be a resin material having urethane acrylate oligomer as a main raw material.

[0057] The light guide member 110 is provided as a resin layer that guides light, and therefore can be provided as a flexible plate with a smaller thickness than glass material. The light guide member 110 can emit light emitted from the light source 102 in a circular dot pattern or a polygonal dot pattern. The light guide member 110 can include beads (not shown), which can diffuse and reflect the incident light to increase the amount of light. The beads can be made of any one selected from silicon, silica, glass bubbles, PMMA (Polymethyl methacrylate), urethane, Zn, Zr, Al2O3, and acrylic.

[0058] The light source 102 is embedded in the light guide member 110. The light source 102 is disposed in the light guide member 110 and emits generated light toward the light guide member 110. The light guide member 110 can protect the light source 102 therein and reduce loss of light emitted from the light source 102. The light source 102 is disposed in an area that does not overlap with an emission surface 151 of the light guide member 110 in the vertical direction.

[0059] The top layer or upper surface of the substrate 101 may be in contact with the bottom surface S0 of the light-guiding member 110. When the reflective layer disclosed above is disposed on the top layer, the reflective layer may be in contact with the bottom surface S0 of the light-guiding member 110. Here, the reflective layer is fixed between the light-guiding member 110 and the substrate 101.

[0060] 3 and 6, the maximum length X1 of the light-guiding member 110 in the first direction X may be greater than the width Y1 of the light-guiding member 110 in the second direction Y. In this case, the light-guiding member 110 may have one, two or more, or four or less light-emitting cells. The maximum length of the light-guiding member 110 in the first direction X may be greater than the width of the light-emitting cell in the second direction Y.

[0061] The maximum height TO of the light guide member 110 in the third direction Z may be smaller than the maximum length X1 of the first direction X and may be equal to or different from the width Y1 of the light guide member 110 in the second direction Y. For example, the maximum height TO of the light guide member 110 in the third direction Z may be larger than the width Y1 of the light guide member 110 in the second direction Y (FIG. 6), and the difference between the height TO and the width Y1 may be 5 mm or less, for example, 3 mm or less. By providing the maximum height TO of the light guide member 110 in the third direction Z larger than the width Y1, a guide space in a vertical direction for the light emitted from the light source 102 can be provided, and if the width Y1 is smaller than the width Y1, the light extraction efficiency is reduced. By providing the width Y1 of the light guide member 110 in the second direction Y narrow and the length X1 of the light guide member 110 in the first direction X long, a dot pattern illumination can be provided for a vehicle lamp having a narrow width.

[0062] The light-guiding member 110 includes an exit surface 151 and a first reflecting surface 131 opposite to the exit surface 151. The first reflecting surface 131 may be disposed on the other side of the light-guiding member 110. The light-guiding member 110 may include a second reflecting surface 111 on one side. The second reflecting surface 111 is a surface on one side of the light-guiding member 110 and can reflect light emitted from the light source 102 to the first reflecting surface 131.

[0063] The exit surface 151 is a surface from which light emitted from the light source 102 exits, and may be an upper surface of the light-guiding member 110. The first reflection surface 131 is a surface that reflects incident light in the direction of the exit surface 151.

[0064] The emission surface 151 may have a pattern P1 having a predetermined shape arranged in a first direction X and / or a second direction Y. The plurality of patterns P1 may be arranged in a matrix shape, with each unit pattern being connected in the first and second directions X and Y perpendicular to each other, and may have a convex curved shape or a polygonal pyramid or prism pattern P2 as shown in Figures 12 and 14. As another example, the pattern P1 may be arranged in a diagonal direction inclined with respect to the first direction X and / or the second direction Y.

[0065] The exit surface 151 may overlap the first reflecting surface 131 in the vertical direction Z. The exit surface 151 may not overlap the second reflecting surface 111 in the vertical direction Z. The first reflecting surface 131 may not overlap the second reflecting surface 111 in the vertical direction Z. The first reflecting surface 131 may overlap the second reflecting surface 111 in the first direction X. Here, the substrate 101 may overlap the second reflecting surface 111 and the exit surface 151 in the vertical direction. A part of the substrate 101 may overlap the first reflecting surface 131 in the vertical direction. One end or a start position of the first reflecting surface 131 is disposed outside an upper end or a terminal position of the second reflecting surface 111, or is disposed closer to the other end of the light-guiding member 110 than an upper end or a terminal position of the second reflecting surface 111.

[0066] An area of ​​the exit surface 151 may be larger than an area of ​​the first reflecting surface 131. A length of the exit surface 151 in the first direction X may be larger than a length of the first reflecting surface 131 in the first direction X. A width Y1 of the exit surface 151 in the second direction Y may be the same as a width of the first reflecting surface 131 in the second direction Y. A width Y1 of the exit surface 151 in the second direction Y may be the same as a width of the second reflecting surface 111 in the second direction Y.

[0067] The first reflective surface 131 may be provided in a multi-step structure. The first reflective surface 131 may be lowest at a first position adjacent to the light source 102, and the position of the first reflective surface 131 may become gradually higher as the region is farther from the light source 102. That is, based on a straight line horizontally extended with respect to the upper surface of the substrate 101, heights T1, T2, T3, T4, T5, and T6 of the first reflective surface 131 may become gradually higher as the region is farther from the light source 102.

[0068] The multi-step structure of the first reflecting surface 131 includes an inclined surface. The inclined surface may be horizontally opposed to the second reflecting surface 111. The inclined surface may reflect the light reflected by the second reflecting surface 111 toward the light exit surface. A straight line passing through the lower ends of the reflecting portions C1-C6 of the second reflecting surface 111 may be set at an angle of 70 degrees or less, for example, in the range of 30 degrees to 70 degrees or 40 degrees to 52 degrees, based on a straight line horizontal to the upper surface of the substrate 101.

[0069] 6, the first reflective surface 131 includes a plurality of reflective portions C1, C2, C3, C4, C5, and C6, and the plurality of reflective portions C1, C2, C3, C4, C5, and C6 may include n (n is 3 or more) reflective portions. The plurality of reflective portions C1, C2, C3, C4, C5, and C6 may be arranged in a step structure having heights that gradually increase from one end to the other end of the first reflective surface 131. The plurality of reflective portions C1, C2, C3, C4, C5, and C6 may include a first reflective portion C1 adjacent to the light source 102, a second reflective portion C2 adjacent to or disposed outside the first reflective portion C1, an outermost reflective portion C6, and one or more intermediate reflective portions C3, C4, and C5 between the outermost reflective portion C6 and the second reflective portion C2. The intermediate reflective portions C3, C4, and C5 may include, for example, third to fifth reflective portions C3, C4, and C5, and the outermost reflective portion may be a sixth reflective portion C6. For example, the first reflective portion C1 may have a first height T1 based on the upper surface of the substrate 101, and the second reflective portion C2 may have a second height T2 greater than the first height T1. In this manner, the heights may increase gradually from the first reflective portion C1 to the sixth reflective portion C6.

[0070] Each of the plurality of reflecting portions C1, C2, C3, C4, C5, and C6 is disposed at equal intervals in the first direction, and the last reflecting portion C6 may be disposed up to the last inclined surface or may include the other end. Here, the other end of the first reflecting surface 131 may be connected to the pattern P1 and extend horizontally from the inclined surface. The other end of the first reflecting surface 131 may have an outer first end 29A and an inner second end 29B, and the first and second ends 29A and 29B may be disposed in a zigzag shape. The second end 29B may be disposed inward of the first end 29A and between protruding portions 152 having a concave or open region 30. Here, the region 30 between the protruding portions 152 may be open from the bottom to the top, and the region 30 between the first to fifth reflecting portions C1-C5 may be a concave region.

[0071] Each of the plurality of reflective portions C1, C2, C3, C4, C5, and C6 includes a plurality of first surfaces 31, 32, 33, 34, 35, and 36 and a plurality of second surfaces 41, 42, 43, 44, 45, and 46, and the plurality of first surfaces 31, 32, 33, 34, 35, and 36 may be spaced apart from each other in the second direction Y, and the plurality of second surfaces 41, 42, 43, 44, 45, and 46 may be spaced apart from each other in the second direction Y. Each of the first surfaces 31, 32, 33, 34, 35, and 36 and the second surfaces 41, 42, 43, 44, 45, and 46 may be disposed in a zigzag shape in the second direction Y and may have regular intervals. The plurality of first surfaces 31, 32, 33, 34, 35, 36 are spaced apart by a width E1 of the second surfaces 41, 42, 43, 44, 45, 46, and the plurality of second surfaces 41, 42, 43, 44, 45, 46 are spaced apart by the width of the first surfaces 31, 32, 33, 34, 35, 36. The widths E1 of the first surfaces 31, 32, 33, 34, 35, 36 and the widths E1 of the second surfaces 41, 42, 43, 44, 45, 46 may be the same as each other in the second direction. Each of the plurality of reflective portions C1-C6 may have a matrix shape in which the first surfaces 31, 32, 33, 34, 35, and 36 and the second surfaces 41, 42, 43, 44, 45, and 46 are alternately arranged, and light in a dot matrix shape may be emitted according to the matrix-shaped pattern P1 of the light exit surface 151.

[0072] With respect to a straight line extended to the upper surface of the substrate 101 as a reference, the heights T1, T2, T3, T4, T5, and T6 of the lower ends of the first surfaces 31, 32, 33, 34, 35, and 36 in each of the reflective portions C1-C6 may be the same as the heights of the lower ends of the second surfaces 41, 42, 43, 44, 45, and 46. The heights T1, T2, T3, T4, T5, and T6 of the lower ends of the first surfaces 31, 32, 33, 34, 35, and 36 in different reflective portions may be different from each other. The heights of the lower ends of the second surfaces 41, 42, 43, 44, 45, and 46 in different reflective portions may be different from each other. The height T6 of the lower surface of the sixth reflective portion C6, which is the last reflective portion, may be located at a position that is 80% or more of the maximum thickness T0 of the light-guiding member 110, for example, in a range of 80% to 90%, with respect to a straight line horizontal to the upper surface of the substrate 101 as a reference. In the heights T1-T6 of the reflective portions C1-C6, the height difference between adjacent reflective portions may be the same as the first height T1. That is, the height differences between the adjacent reflective portions may be the same. The height T1 of the first reflective portion C1 adjacent to the light source 102 may be the smallest, and the height of the last reflective portion C6 may be the largest. That is, the height of the lower space of the first reflective portion C1 may be the smallest, and the height C6 of the lower space of the sixth reflective portion C6 may be the largest.

[0073] In each of the reflecting portions C1-C6, the first surfaces 31, 32, 33, 34, 35, 36 may be farther away from the light source 102 or one end of the first reflecting surface 131 than the second surfaces 41, 42, 43, 44, 45, 46. In each of the reflecting portions C1-C6, the first surfaces 31, 32, 33, 34, 35, 36 are disposed outward in the first direction X based on one end of the first reflecting surface 131 than the second surfaces 41, 42, 43, 44, 45, 46. The first surfaces 31, 32, 33, 34, 35, 36 may be located on the other side of the first direction X than the second surfaces 41, 42, 43, 44, 45, 46, and may be disposed on one side, the other side, or both sides in the second direction Y. The second surfaces 41, 42, 43, 44, 45, and 46 may be located on one side in the first direction X relative to the first surfaces 31, 32, 33, 34, 35, and 36, and may be located on one side, the other side, or both sides in the second direction Y.

[0074] The first surfaces 31, 32, 33, 34, 35, and 36 or the second surfaces 41, 42, 43, 44, 45, and 46 may be exposed at a first side surface S1 of the light guide member 131. The second surfaces 41, 42, 43, 44, 45, and 46 or the first surfaces 31, 32, 33, 34, 35, and 36 may be exposed at a second side surface S2 of the light guide member 131.

[0075] The first and second sides S1 and S2 of the light guide member 131 may have first surfaces 31, 32, 33, 34, 35, 36 and second surfaces 41, 42, 43, 44, 45, 46 that are different from each other. As another example, the first and second sides S1 and S2 of the light guide member 131 may have the same first surfaces 31, 32, 33, 34, 35, 36 or second surfaces 41, 42, 43, 44, 45, 46. The shape of the reflective surface exposed on both sides of the light guide member 131 is variable according to the pattern shape. Thus, the lighting device can provide various light distribution images according to the pattern shape. The shapes of the first and second sides 31-36 and 41-46 may be not only rectangular but also polygonal structures having more than one triangle, a line shape long in the first direction, a line shape long in the second direction, a circle, or an ellipse. The shape of the pattern P1 may be a polygon such as a triangle or pentagon, a circle, or an ellipse, as well as a polygonal shape. The pattern P1 may be a line shape that is long in a first direction, or a line shape that is long in a second direction.

[0076] 6, 10 and 18, in the matrix-shaped pattern P1, each pattern P1 corresponding to the first surface 31-36 and the second surface 41-46 of the reflective portion C1-C6 may be defined as a bright portion B1 that emits light, and each pattern P1 corresponding to the area between the first surface 31-36 and the second surface 41-46 may be a dark portion B2 having low luminous intensity or low light amount. Thus, the patterns of the bright portion B1 and the dark portion B2 are alternately arranged in the first and second directions on the light output surface 151. In FIG. 18, the area A1 is an area corresponding to the intermediate reflective portion of the reflective portion C1-C6.

[0077] 4 to 6, the lower surface of the first reflecting surface 131 may include a plurality of bottom surfaces 21, 22, 23, 24, 25, and 26. The plurality of bottom surfaces 21, 22, 23, 24, 25, and 26 may be bottom surfaces of the respective reflecting portions C1-C6.

[0078] The plurality of bottom surfaces 21, 22, 23, 24, 25, 26 are connected to the lower end of the first surface 31-36 at one or both sides in the second direction Y of the second surface 41-46 of each of the reflecting portions C1-C6. Each of the bottom surfaces 21, 22, 23, 24, 25, 26 has a bottom region 20 between the upper end of the first surface 31-36 and the lower end of the second surface 41-36, and the bottom region 20 is connected to the upper end of the first surface 31-36 and to the lower end of the second surface 41-36. In addition, a portion 20A of the bottom region 20 extends to the region between the bottom surfaces 21-26.

[0079] The plurality of bottom surfaces 21-26 may be arranged as horizontal or non-reflective surfaces in the region between the first surface 31-36 and the second surface 41-46, and the bottom surfaces of the adjacent reflecting portions may be extended horizontally. Such a region of the bottom surface 21-26 may correspond to a dark pattern on the emission surface 151. Here, the sum of the number of the first surfaces 31-36 and the number of the second surfaces 41-46 may be different from the number of the plurality of patterns P1, and may be smaller than the number of the patterns P1, for example. The number of the patterns P1 may be more than twice the sum of the number of the first surfaces 31-36 and the number of the second surfaces 41-46, or may be in the range of two to three times.

[0080] As shown in FIG. 6 and FIG. 11, the length W1 of the first surface 31-36 and the length W2 of the second surface 41-46 in the horizontal direction are lengths on a straight line passing through both ends of the first surface 31-36 and the second surface 41-46, and may be the same as each other. The width E1 of the first surface 31-36 and the second surface 41-46 in the second direction may be the same as the horizontal lengths W1, W2 of the first surface 31-36 and the second surface 41-46. The length between the lower end and the upper end of each of the first surface 31-36 and the second surface 41-46 in the inclined direction may be larger than the width E1 of each of the first surface 31-36 and the second surface 41-46. As a result, the first surface 31-36 and the second surface 41-46 can vertically overlap with each pattern P1 of the exit surface 151, and the incident light can be reflected toward each pattern P1 of the exit surface 151.

[0081] 11, a light guide distance of light traveling horizontally from the light source 102 to the center of the first surface 32 of the second reflector C2 through the second reflector surface 111 may be greater than a light guide distance of light traveling horizontally from the light source 102 to the center of the first surface 31 of the first reflector C1 through the second reflector surface 111. Also, a light guide distance of light traveling vertically from the center of the first surface 31 of the first reflector C1 to the exit surface 151 may be greater than a light guide distance of light traveling vertically from the center of the first surface 32 of the second reflector C2 to the exit surface 151. In this way, the thickness of the light guide member 110 can be made thinner in an area farther from the light source 102 so that the light guide distance of the light passing through each reflector C1-C6 does not affect the light distribution.

[0082] 11, a width W3 between the lower end of the first surface 31-36 and the upper end of the second surface 41-46 may be equal to horizontal lengths W1, W2 of the first surface 31-36 and the second surface 41-46. This allows the light exit surface 151 to emit light in a matrix shape having a constant unit dot pattern area.

[0083] As shown in FIG. 6, the distance E5 between the first surface 31-36 and the second surface 41-46 of the adjacent reflecting portion C1-C6 may be the same as the length W1 of the first surface 31, 32, 33, 34, 35, 36 or / and the length W2 of the second surface 41, 42, 43, 44, 45, 46. As shown in FIG. 11, the interval W2 between the first surface 31-36 and the second surface 41-46 in each reflecting portion C1-C6 may be the same as the length W1 of the first surface 31-36 or / and the length W2 of the second surface 41-46. Also, the heights T11 of the reflecting portions C1-C6 may be the same as each other. As a result, the light reflected by the first reflecting surface 131 is uniformly extracted through the pattern P1 of the exit surface 151.

[0084] 5, the inclination angle R12 of the first surfaces 31-36 may have an internal angle of 120 degrees or more with respect to a straight line horizontal to the upper surface of the substrate 101. The inclination angle R12 of the first surfaces 31, 32, 33, 34, 35, and 36 may have a range of, for example, 120 degrees to 150 degrees or 128 degrees to 140 degrees.

[0085] The inclination angles of the second surfaces 41, 42, 43, 44, 45, and 46 may be in the range of 120 degrees to 150 degrees or 128 degrees to 140 degrees as an interior angle with respect to a straight line horizontal to the upper surface of the substrate 101. The inclination angle R12 of the first surfaces 31, 32, 33, 34, 35, and 36 may be the same as the inclination angle of the second surfaces. As a result, the light reflected by the first surfaces 31-36 and the second surfaces 41-46 may have a uniform light distribution through each pattern P1 of the exit surface 151. Here, FIG. 17(a) shows the light distribution in the unit pattern of the exit surface 151 when the inclination angle R12 between the first surface 31-36 and the second surface 41-46 is 135 degrees, and FIG. 17(b) shows the light distribution in the unit pattern of the exit surface 151 when the inclination angle between the first surface 31-36 and the second surface 41-46 is 133 degrees. The pattern P1 in this case may be a polygonal plane. FIG. 17(c) shows the light distribution when the inclination angle between the first surface 31-36 and the second surface 41-46 is 133 degrees and the unit pattern P1 of the exit surface 151 is a convex curved surface, and a three-dimensional pattern can be emitted. In this way, the embodiment of the invention can provide a uniform light distribution in each pattern P1 by making the inclined first and second surfaces of the first reflecting surface 131 correspond to each convex pattern of the exit surface 151.

[0086] FIG. 10 shows the distribution of light reflected by the second reflecting surface 111. As shown in FIG. 10, the light source 102 includes an LED chip, and the LED chip has the highest luminosity of light emitted from the center of the upper surface. As a result, the light source 102 may have the highest light distribution (i.e., the distribution of the main light) at the center of the upper surface where the distribution angle R1 of the main light is 70 degrees or less, for example, in the range of 30 degrees to 60 degrees. That is, the highest light distribution (i.e., the distribution of the main light) on the light source 102 may have a sum (i.e., R1) of the outer angle R10 and the inner angle R11 based on the optical axis of 70 degrees or less or in the range of 30 degrees to 60 degrees. Here, the outer angle R10 may be equal to or greater than the inner angle R11, and the difference between the inner angle R11 and the outer angle R10 may be 5 degrees or less. As the distribution of light emitted from the light source 102 varies depending on the region, the distribution of the light reflected by the first reflecting surface 131 is also transmitted differently.

[0087] 4 and 10, the distance D1 between the lower end of the second reflecting surface 111 and the light source 102 may be 5 mm or less, for example, in the range of 1 to 5 mm or in the range of 2 to 4 mm. If the minimum distance D2 between the light source 102 and the second reflecting surface 111 is smaller than the range, the dark area in the lower end central region G1 disclosed in FIG. 20 increases, and if it is larger than the range, the overall luminous intensity decreases. FIG. 20 shows a light distribution diagram on the other side of the light guide member, and it can be seen that the middle regions G3 and G4 of the outer region of the lower end central region G1 appear higher than other regions. In order to solve such a luminous intensity difference, the invention can process the surface of the first reflecting surface 131 corresponding to the middle regions G3 and G4 into an inclined surface of a concave-convex pattern. That is, the center between the upper end and the lower end of the second reflecting surface 111 can face the first and second surface regions A11 having the concave-convex pattern.

[0088] The present invention may have a concave-convex pattern for reducing light reflection in the area of ​​the first reflecting surface 131 through which the main light is transmitted. The concave-convex pattern may be provided as a rough surface by surface treatment in a chemical or mold process. As shown in FIG. 19, the concave-convex pattern may have an inclined surface 33A and an inclined plane 23A, and the inclined surface 33A of the inclined concave-convex pattern may reduce the intensity or amount of reflected light transmitted to each bright pattern. The first surface 31-36 or the second surface 41-46 may include the inclined surface 33A or the inclined plane 23A of the inclined concave-convex pattern. Thus, the corroded inclined surface 33A may be located in the center area A11 through which the main light is transmitted, and the center area A11 of the first reflecting surface 131 may be a surface of the center area of ​​the distribution of the first surface 31-36 and the second surface 41-46. As a result, the difference in intensity or distribution between the light reflected at the peripheral region of the first reflecting surface 131 and the light reflected at the center region A11 is reduced, and the light distribution becomes uniform on the exit surface 151. The center region A11 of the first reflecting surface 131 may be a central region of the region of the first reflecting surface 131 in the second and third directions.

[0089] The lower surface S0 of the light guide member 110 may be the lowest surface and may have an area smaller than that of the first reflecting surface 131. The lower surface S0 of the light guide member 110 is provided as a horizontal plane and is attached to the substrate 101.

[0090] A maximum length X1 in the first direction of the light guiding member 110 may be smaller than a maximum length Y1 in the second direction Y of the first reflecting surface 131, and may be less than 60% of the maximum length in the second direction Y of the first reflecting surface 131. This can increase the area of ​​the first reflecting surface 131 of the light guiding member 110, and minimize the area of ​​the lower surface S0 facing the substrate 101. A width Y1 in the second direction Y of the lower surface S0 of the light guiding member 110 may be the same as the width in the second direction Y of the first reflecting surface 131.

[0091] 3, 4 and 7, the second reflective surface 111 is one side of the light-guiding member 110 and includes a flat reflective portion 112 and a curved reflective portion 113. The flat reflective portion 112 is disposed outside the light source 102 and may overlap the light source 102 in a horizontal direction. A height H1 of the flat reflective portion 112 from a lower end to an upper end may be twice or more higher than a thickness of the light source 102 and may be 30% or less of a maximum height T0 of the light-guiding member 110, for example, in a range of 15% to 30% or 15% to 25%.

[0092] A straight line passing through the upper end of the planar reflector 112 and the center of the upper surface of the light source 102 has a third angle R3 with respect to the central axis of the light source 102, and the third angle R3 may be 60 degrees or more, for example, in the range of 60 degrees to 80 degrees or in the range of 65 degrees to 80 degrees. When the upper end position of the planar reflector 112 is provided in the above range, the light emitted through the outer surface of the light source 102 is reflected by the planar reflector 112. The planar reflector 112 has a higher reflection efficiency than a convex curved surface, and is provided as a plane perpendicular to the outer side of the light source 102, so that the size of the dark area due to the light emitted to the outside of the light source 102 can be reduced. In addition, the area of ​​the planar reflector 112 can reflect the light of the directional angle distribution of the light source 102, i.e., 60 degrees or more or 65 degrees or more with respect to the optical axis.

[0093] The curved reflector 113 is disposed around the planar reflector 112 and is provided with a convex curved surface between an upper end of the planar reflector 112 and one end of the exit surface 151, and between an edge of the planar reflector 112 and both side surfaces S1 and S2 of the light-guiding member 110. The curved reflector 113 may have a curved surface that is convex from a straight line passing through an edge of the planar reflector 112 and one end of the exit surface 151, and may have a curved surface that is convex from a straight line passing through the edge of the planar reflector 112 and the side surfaces S1 and S2 of the light-guiding member 110. This can improve the reflection efficiency of the curved reflector 113.

[0094] The curved reflecting portion 113 may include an inner second angle R2 and an outer third angle R3 based on the optical axis, and the sum of the second and third angles R2 and R3 may be 70 degrees or more, for example, in the range of 70 degrees to 110 degrees or in the range of 80 degrees to 100 degrees. Such a curved reflecting portion 113 may reflect the light emitted from the light source 102 to the first reflecting surface 131.

[0095] The curved reflecting portion 113 may overlap the first reflecting surface 131 in the first direction X. The curved reflecting portion 113 may overlap the first faces 31-36 and the second faces 41-46 of the reflecting portions C1-C6 in the first direction X. The second reflecting surface 111 may not overlap the first reflecting surface 131 in the vertical direction. A part of the planar reflecting portion 112 may overlap the first reflecting portion C1 in the first direction X. That is, the height H1 of the planar reflecting portion 112 may be greater than the height (e.g., T1) of the step portion 21A between the first reflecting surface 131 and the lower surface S0, and may be less than the height T2 of the lower end of the second reflecting portion C2. This can minimize a reduction in the amount of light incident on the first reflecting portion C1.

[0096] The curved reflecting portion 113 is disposed outside the exit surface 151. The exit surface 151 may overlap a lower surface S0 of the light-guiding member 110 and the first reflecting surface 131 in a vertical direction.

[0097] A distance D2 from the light source 102 to the step portion 21A is a distance between the light source 102 and one end of the first reflecting portion C1, and may be 5 mm or more, for example, in the range of 5 to 20 mm or 10 to 20 mm. By providing the distance D2 from the light source 102 to the first reflecting portion C1 within the above range, it is possible to reduce a problem of an increase in the luminous intensity of the light reflected by the first reflecting portion C1.

[0098] The exit surface 151 has unit patterns having convex curved surfaces arranged in a matrix, and light reflected by the first surfaces 31-36 and the second surfaces 41-46 of the reflecting parts C1-C6 is emitted in a dot matrix form. For example, as shown in Fig. 12, a dark part B2 that is lower in luminance than a bright part B1 that emits light or does not emit light is extracted in a dot matrix form. Here, a region that does not overlap with the first reflecting surface 131, i.e., one side region of the exit surface 151 that vertically overlaps with the lower surface S0 of the light-guiding member 110, can emit light in the bright part B1 without the dark part. Such one side region of the exit surface 151 is blocked by an external lamp structure.

[0099] 12 to 14 are another example of the lighting device disclosed above, and the configuration different from the lighting device disclosed above will be mainly described.

[0100] 12 to 14, the light guide member 110 includes an exit surface 151, a first reflecting surface 131, and a second reflecting surface 111. The first reflecting surface 131 may be applied to the description of the embodiment disclosed above. The second reflecting surface 111 of the light guide member 110 includes an upper curved reflecting portion 113 and a lower reflecting portion 112A. The lower reflecting portion 112A may have a number of sub-reflecting surfaces 11-16, and the first sub-reflecting surfaces 11, 13, 15 having a curved or inclined surface at a lower end adjacent to the light source 102 and the second sub-reflecting surfaces 12, 14, 16 perpendicular to the first sub-reflecting surfaces 11, 13, 15 are alternately arranged. The lower reflecting portion 112A of the second reflecting surface 111 may have sub-reflecting surfaces 11-16 arranged in multiple stages to reduce light loss outside the light source 102. Also, the lower reflecting portion 112A closest to the light source 102 may be provided as a third sub-reflecting surface 11A that is a vertical plane.

[0101] The first sub-reflecting surfaces 11, 13, 15 and the second sub-reflecting surfaces 12, 14, 16 having the curved or inclined surfaces may have a concentric circular shape at the center of the outer lower end of the second reflecting surface 111, and may have a semicircular shape. The upper end height of the lower reflecting portion 112A may be less than 50% of the maximum thickness T0 (see FIG. 3) of the light-guiding member 110 based on the upper surface of the substrate 101. The upper end height of the lower reflecting portion 112A may be the same as or lower than the lower end height of the third reflecting portion C3. Here, among the first sub-reflecting surfaces 11, 13, 15, a part of the 1-2 and 1-3 sub-reflecting surfaces 11, 13, 15 and the 2-1, 2-2, 2-3 sub-reflecting surfaces 12, 14, 16 may overlap the first and second reflecting portions C1 and C2 in the horizontal direction. In this way, the lower reflector 112A can reflect the light traveling in a lateral direction from the light source 102 to the first reflector 131 as much as possible, thereby reducing light loss and providing a uniform light distribution over the entire area. As a result, the lower reflector 112A can reduce the amount of light loss below the second reflector 111 and prevent an increase in the size of a dark area due to this.

[0102] The pattern P2 of the exit surface 151 is a prism pattern, for example, a polygonal pyramid-shaped unit pattern arranged in a matrix form. The period or interval of the pattern P2 of the exit surface P2 may be equal to or smaller than the length in the first direction of the first surfaces 31-36 or the second surfaces 41-46. Thus, the emitted light is uniformly distributed through the center and polygonal surfaces of the pattern P2 by the triangular pyramid-shaped pattern.

[0103] 1 and 12 can be defined as one light emitting cell, and a lighting device 200A having a plurality of light emitting cells can be provided as shown in FIG.

[0104] 15, the lighting device 200A may include a light emitting unit 100B having a substrate 101 and a plurality of light sources 102 arranged in a second direction, and a light guiding member 110A that guides, reflects, and emits light emitted from the light emitting unit 100B. The light guiding member 110A may include the above-disclosed emission surface 151B and a first reflection surface 131 (FIG. 6) opposite to the emission surface 151B. The light guiding member 110A may include a plurality of second reflection surfaces 111B that overlap the substrate 101 in a vertical direction on one side.

[0105] The lighting device 200A may be formed integrally with a plurality of light emitting cells. That is, the distance between both sides S11 and S12 of the light guide member 110A may be calculated by multiplying the distance between both sides in FIG. 1 or FIG. 12 by the number of cells (where x is multiplication). The maximum length of the light guide member 110A in the first direction may be equal to or less than twice the length X1 in FIG. 1 or FIG. 12.

[0106] Here, each of the second reflecting surfaces 111B may be the same as the second reflecting surface 111 in FIG. 1 or FIG. 12. The first reflecting surface 131 may be the same as the first reflecting surface 131 in FIG. 1 or FIG. 12. The exit surface is an exit surface 151 in FIG. 1 or FIG. 12 arranged in a second direction. A unit width Y1 of the second reflecting surface 111 in the second direction Y may be the width of the second reflecting surface 111 in FIG. 1 or FIG. 12. A recessed groove R0 may be formed in an area between unit sizes of the second reflecting surface 111 to provide the curved reflecting portion 113 disclosed above. As another example, although the light emitting cells of the lighting device as shown in FIG. 1 or FIG. 12 have been described as being integrally formed in the second direction, the light emitting cells may be arranged in a zigzag shape, adjacent light emitting cells may be partially connected to each other to have an angle of 10 degrees to 90 degrees, and the light emitting cells may be arranged in a triangular or rectangular shape. As shown in FIG. 23, the lighting device 200, 200A disclosed above can emit light in a dot matrix shape by exposing the pattern P1 disclosed above to a rear lamp of a vehicle.

[0107] 16, a reflective member 115 is disposed on the outer side of the flat reflective portion 112 of the second reflective surface 111 of the light-guiding member 110. The reflective member 115 may be made of a resin material to which a reflective material, for example, a metal oxide, is added. The metal oxide may include at least one of TiO2, SiO2, and Al2O3.

[0108] The reflecting member 115 reflects light leaked to the outside of the light source 102 to reduce light loss and to reduce dark areas caused by light leaking through the flat reflecting portion 112 .

[0109] FIG. 21 is a plan view of a vehicle to which a lighting device according to an embodiment of the present invention is applied, and FIG. 22 is a diagram showing an example of a tail light of the vehicle of FIG.

[0110] 21 and 22, in a moving body or vehicle 900, a front lamp 850 may include one or more lighting modules, and the driving timings of these lighting modules may be individually controlled to provide not only a normal headlight function but also additional functions 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.

[0111] In the vehicle 900, the tail lamp 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 disposed on the outside, a second lamp unit 814 disposed around the inside of the first lamp unit 810, and a third and fourth lamp units 814, 816 disposed on the inside of the second lamp unit 814. The first to fourth lamp units 810, 812, 814, 816 may selectively apply 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, 816. The lighting device disclosed in the embodiment applied to the lamp units 810, 812, 814, 816 may emit surface light with a uniform distribution.

[0112] 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 in which these shapes are mixed. The first and second lamp units 810 and 812 may be arranged in one or more tail lights. The first lamp unit 810 may be provided as a tail light, the second lamp unit 812 may be provided as a brake light, the third lamp unit 814 may be provided as a backup lamp, and the fourth lamp unit 816 may be provided 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 the light distribution regulations for stop lamps, tail lamps, etc. As shown in FIG. 23, the illumination device can emit light in a dot matrix form in the tail light.

[0113] 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.

[0114] 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; a light source disposed on the substrate; a light guiding member disposed on the substrate and the light source; the light guiding member includes an exit surface and a first reflecting surface facing the exit surface, the first reflecting surface includes a plurality of reflecting portions having different heights with respect to an upper surface of the substrate, An illumination device, wherein each of the plurality of reflecting portions includes a plurality of first surfaces inclined with respect to an upper surface of the substrate.

2. The plurality of reflecting portions include a first reflecting portion having a first height based on an upper surface of the substrate, and a second reflecting portion having a second height greater than the first height, The lighting device according to claim 1 , wherein the first reflecting portion is disposed closer to the light source than the second reflecting portion is.

3. The lighting device according to claim 1 , wherein the first surface is inclined at a first angle of 120 degrees or more with respect to a straight line horizontal to an upper surface of the substrate.

4. Each of the plurality of reflecting portions is disposed between the plurality of first surfaces and includes a plurality of inclined second surfaces, The lighting device according to claim 1 , wherein the second surfaces are disposed closer to the light source than the first surface is.

5. The lighting device of claim 4 , wherein the second surface has an inclination angle equal to an inclination angle of the first surface with respect to a straight line parallel to an upper surface of the substrate.

6. The lighting device according to claim 4 , wherein the reflecting portions are arranged so that ...

7. a light guide distance of light horizontally incident on the second reflector from the light source through a different reflecting surface is greater than a light guide distance of light horizontally incident on the first reflector from the light source through a different reflecting surface, The lighting device according to claim 4 , wherein a guided distance of light traveling perpendicularly from the first reflecting portion to the exit surface is greater than a guided distance of light traveling perpendicularly from the second reflecting portion to the exit surface.

8. A substrate; a light source disposed on the substrate; a light guiding member disposed on the substrate and the light source; the light guiding member includes an exit surface and a first reflecting surface facing the exit surface, the exit surface includes a plurality of patterns; the first reflecting surface includes a plurality of first surfaces having different heights with respect to an upper surface of the substrate; A lighting device, wherein a number of the plurality of patterns is different from a number of the plurality of first surfaces.

9. The lighting device according to claim 8 , wherein a number of the plurality of patterns is greater than a number of the plurality of first surfaces.

10. The lighting device according to claim 8 , wherein the plurality of patterns are connected to each other in first and second directions perpendicular to each other.

11. The lighting device according to claim 8 , wherein each of the plurality of first surfaces is inclined, and a thickness of the light-guiding member gradually decreases toward a first surface farther from the light source.

12. The lighting device according to claim 11 , wherein the pattern on the exit surface corresponding to the first reflecting surface includes a pattern overlapping the first surface in a vertical direction and a pattern overlapping a bottom surface of the first reflecting surface in a vertical direction.

Images