KR20200126290A - Lighting module and lighting apparatus - Google Patents

Abstract

A lighting device disclosed in the embodiment includes: a substrate; a phosphor layer disposed on the substrate; a light source disposed on the substrate; and a resin layer covering the phosphor layer and the light source on the substrate, wherein the phosphor layer is disposed between the substrate and the resin layer, and the light source includes a first light source disposed between a first side of the resin layer and a first side of the phosphor layer, and a second light source disposed between the second side of the resin layer and the second side of the phosphor layer, and a distance between the first surface and the second surface of the phosphor layer may be smaller than the minimum distance between the first light source and the second light source.

Description

A lighting module and a lighting device equipped with it {LIGHTING MODULE AND LIGHTING APPARATUS}

The embodiment relates to a lighting module and a lighting device having a plurality of light sources.

The embodiment relates to a lighting module and a lighting device providing a surface light source.

The embodiment relates to a light unit or vehicle lamp having a lighting module or device.

Typical lighting applications include vehicle lights as well as backlights for displays and signs.

Light-emitting devices, for example, light-emitting diodes (LEDs) have advantages such as low power consumption, semi-permanent life, fast response speed, safety, and environmental friendliness compared to conventional light sources such as fluorescent lamps and incandescent lamps. Such light-emitting diodes are applied to various display devices, various lighting devices such as indoor or outdoor lights.

Recently, as a vehicle light source, a lamp employing a light emitting diode has been proposed. Compared with an incandescent lamp, a light emitting diode is advantageous in that power consumption is small. However, since the emission angle of light emitted from the light emitting diode is small, when the light emitting diode is used as a vehicle lamp, there is a demand for increasing the light emitting area of the lamp using the light emitting diode.

Since the light emitting diode is small, it can increase the design freedom of the lamp, and it is economical due to its semi-permanent life.

An embodiment of the invention provides a lighting module or lighting device that provides a surface light source.

An embodiment of the present invention provides a lighting module or lighting device having a phosphor layer for converting wavelength of light irradiated from a light source between a substrate and a resin layer.

An embodiment of the present invention provides a lighting module or lighting device in which a plurality of light sources and a phosphor layer are disposed at an edge between a substrate and a resin layer.

An embodiment of the present invention provides a lighting module or lighting device including at least one of a plurality of light sources and a resin layer covering a phosphor layer, and an ink layer and a diffusion layer on the resin layer.

An embodiment of the present invention provides a lighting module or lighting device having an opening on a resin layer and a housing disposed to block a region overlapping with a light source.

An embodiment of the invention provides a flexible lighting module or lighting device.

An embodiment of the invention provides a lighting module and a lighting device that irradiates a surface light source.

The embodiment may provide a light unit having a lighting module, a display device, or a vehicle lamp.

A lighting device according to an embodiment of the present invention includes a substrate; A phosphor layer disposed on the substrate; A plurality of light sources disposed on the substrate; And a resin layer covering the phosphor layer and the light source on the substrate, wherein the plurality of light sources include a first light source adjacent to a first side surface of the resin layer and a second light source adjacent to a second side surface of the resin layer. In addition, the phosphor layer may be disposed between the first light source and the second light source.

A lighting device according to an embodiment of the present invention includes a substrate; A phosphor layer disposed on the substrate; A plurality of light sources disposed on the substrate; And a resin layer covering the phosphor layer and the light source on the substrate, wherein the phosphor layer is disposed between the substrate and the resin layer, and the light source comprises a first side surface of the resin layer and a first phosphor layer. A first light source disposed between surfaces and a second light source disposed between a second side surface of the resin layer and a second surface of the phosphor layer, wherein the distance between the first surface and the second surface of the phosphor layer is the It may be smaller than the minimum distance between the first light source and the second light source.

According to an embodiment of the present invention, the first light source may be arranged in plural along the first side of the resin layer, and the second light source may be arranged in plural along the second side of the resin layer. The phosphor layer may be disposed lower than upper surfaces of the first and second light sources, and may be spaced apart from the first and second light sources.

According to an embodiment of the present invention, the first light source and the second light source correspond to each other in a first direction, and the plurality of first light sources and the plurality of second light sources are the first "? Arranged in two directions, the minimum distances between the plurality of first light sources and the first surface of the phosphor layer may be the same, and the minimum distance between the plurality of second light sources and the second surface of the phosphor layer may be the same. have.

According to an embodiment of the present invention, the length of the phosphor layer in the first direction is 50% or more of the length of the resin layer in the first direction, or the first light source and the first light source in a region between the first and second light sources. It may have a length of 80% or more of the minimum distance between the second light sources. The distance between the first surface of the phosphor layer and the plurality of first light sources, or the distance between the second surface of the phosphor layer and the plurality of second light sources is a distance between the plurality of first light sources or the plurality of light sources. It may be smaller than at least one of the intervals between the second light sources of. According to an embodiment of the present invention, the first and second light sources may be disposed closer to the side surface of the resin layer than the phosphor layer.

According to an embodiment of the present invention, the first surface of the phosphor layer includes a plurality of first recesses corresponding to each of the plurality of first light sources, and the second surface of the phosphor layer is each of the plurality of second light sources. And a plurality of second recesses corresponding to, and the first recess and the second recess may be concave in the center direction on the first and second surfaces of the phosphor layer. The minimum distance between the first light source and the first surface having the first recess is smaller than the distance between the first light sources, and the minimum distance between the second light source and the second surface having the second recess The distance may be smaller than the distance between the second light sources.

According to an embodiment of the present invention, an ink layer having a color series of the phosphor layer may be included on the resin layer, and the ink layer may overlap the phosphor layer and the light source in a vertical direction. It may include a housing having an opening open at an upper portion of the resin layer and covering upper portions of the first and second light sources around the resin layer.

According to an embodiment of the present invention, the phosphor layer includes at least one of yellow and red phosphors, and is formed to have a predetermined thickness on the substrate, or the thickness of the edge region and the thickness of the center region adjacent to the first and second light sources May include other areas.

According to an embodiment of the present invention, it is possible to reduce a decrease in the luminous intensity of the surface light source.

According to an embodiment of the invention, it is possible to improve the uniformity of the surface light source.

According to the embodiment of the invention, reducing the thickness of the lighting module?? Can give.

According to an embodiment of the present invention, an unlit image in a module that provides a surface light source can be improved.

According to the practice of the invention, by disposing the phosphor layer closer to the substrate than the emission surface of the resin layer, it is possible to reduce reflection or absorption loss of light by the phosphor.

According to an embodiment of the present invention, it is possible to improve the wavelength conversion efficiency of light emitted from light sources disposed at different edges based on the phosphor layer.

According to an exemplary embodiment of the present invention, a hot spot may be reduced by a housing disposed on each light source in the lighting module.

According to an embodiment of the present invention, by laminating an ink layer or/and a diffusion layer on a resin layer covering the phosphor layer, it is possible to improve the light uniformity of the surface light source.

According to an embodiment of the invention, a flexible lighting module can be implemented.

The embodiment may improve light efficiency and light distribution characteristics of a lighting module.

Optical reliability of a lighting module and a lighting device having the same according to the embodiment may be improved.

It is possible to improve the reliability of the vehicle lighting device having the lighting module according to the embodiment.

The embodiment may be applied to a light unit having a lighting module, various display devices, a surface light source lighting device, or a vehicle lamp.

1 is a plan view showing a lighting device according to a first embodiment of the present invention.
2 is an example of a side cross-sectional view of the lighting device of FIG. 1.
3 is another example of the lighting device of FIG. 2.
4 is a diagram illustrating a first modified example of the lighting device of FIG. 1.
5 is an example of a side cross-sectional view of the lighting device of FIG. 4.
6 is an enlarged view of a first surface of the first light source and the phosphor layer of FIG. 4.
7 is an example in which a light-transmitting member is disposed on the resin layer of the present invention.
8 is an example in which an ink layer is disposed on the resin layer of the present invention.
9 is a modified example of the ink layer of FIG. 8.
10 is a modified example of the phosphor layer of the present invention.
11 is an example in which a housing is disposed on and around the resin layer of FIG. 8.
12 is a modified example of the resin layer of FIG. 11.
13 is an example in which a housing and a lens plate are disposed on the resin layer of the present invention.
14 is a first modified example of the incident surface of the phosphor layer of the present invention.
15 is an example in which the light source on the incident side of the phosphor layer of the present invention is changed.
16 is an example in which a light guide passage is disposed in the phosphor layer of the present invention.
17 is an example of disposing a diffusion agent in the phosphor layer of the present invention.
18 is a modified example of the incident surface of the phosphor layer of the present invention.
19 is another example of the phosphor layer of the present invention.
20 is an example in which a light source is disposed on the front side of a phosphor layer of the present invention.
21 is a perspective view showing another form of a lighting device according to an embodiment of the present invention.
Figure 22 (A) (B) is a view comparing the light uniformity of the comparative example and the invention.
24 is an example of a light source according to an embodiment of the present invention.
25 is a plan view of a vehicle to which a lighting device or a lamp having a lighting module according to an embodiment is applied.
26 is a diagram illustrating a lamp having a lighting module or a lighting device according to an embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it should be understood that the embodiments described in the present specification and the configurations shown in the drawings are only preferred embodiments of the present invention, and there may be various equivalents and modified examples that can replace them at the time of application.

When it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. The terms described below are terms defined in consideration of functions in the present invention, and the meaning of each term should be interpreted based on the contents throughout the present specification. The same reference numerals are used for parts having similar functions and functions throughout the drawings.

The lighting device according to the present invention can be applied to various lamp devices that require lighting, such as vehicle lamps, home lighting devices, and industrial lighting devices. For example, when applied to vehicle lamps, headlamps, sidelights, side mirrors, fog lights, tail lamps, brake lights, daytime running lights, vehicle interior lights, door scars, rear combination lamps, backup lamps It is applicable to etc. The lighting device of the present invention can be applied to indoor and outdoor advertising devices, display devices, and various electric vehicle fields, and in addition, it can be applied to all lighting-related fields or advertisement-related fields that have been developed and commercialized or can be implemented according to future technological development I would say.

Hereinafter, embodiments will be clearly revealed through the accompanying drawings and descriptions of the embodiments. In the description of the embodiments, each layer (film), region, pattern, or structure is formed "on" or "under" of the substrate, each layer (film), region, pad, or patterns. When described as "on" and "under", both "directly" or "indirectly" are formed. In addition, standards for the top or bottom of each layer will be described based on the drawings.

1 is a plan view illustrating a lighting device according to a first embodiment of the present invention, FIG. 2 is an example of a side cross-sectional view of the lighting device of FIG. 1, and FIG. 3 is another example of the lighting device of FIG. 2.

1 and 2, the lighting device 100 includes a substrate 11, light sources 21 and 23 disposed on the substrate 11, and a resin layer 41 covering the light sources 21 and 23. , And a phosphor layer 51 disposed between the resin layer 41 and the substrate 11. The lighting device 100 may emit first light emitted from the light sources 21 and 23 to a surface light source of a different color. The lighting device 100 may be a module or lamp that emits a surface light source, and the second light emitted to the surface light source may include light converted by wavelength by the phosphor layer 51.

The lighting device 100 may include a light transmitting member or a light guide member having a single layer or a plurality of layers. The layer(s) disposed on the resin layer 41 may be a layer having ink, a layer having a diffusion agent, or a layer having ink and a diffusion agent. The region between the resin layer 41 and the substrate 11 includes a layer having a phosphor, or a layer having a colored powder or ink on the upper surface or/and the lower surface of the layer having the phosphor, or/and a diffusion agent A layer with may be disposed. Here, the substrate 11 may be a support member, and the resin layer 41 may be a first resin layer or a light guide member. The phosphor layer 51 may be a second resin layer or a wavelength conversion member.

The thickness t0 of the lighting device 100 is a vertical distance from the lower surface of the substrate 11 to a surface from which light is emitted, and is 3.3 mm or less, for example, in the range of 2 mm to 3.3 mm or in the range of 2.5 mm to 3 mm Can be Since the lighting device 100 is provided with a thin thickness t0, it may be applied in a flexible structure or applied to a lamp housing or bracket having various curves or curved surfaces. The thickness t0 of the lighting device 100 may be 200% or less of the thickness t2 of the resin layer 41, for example, in the range of 150% to 200%. If the thickness t0 of the lighting device 100 is thinner than the above range, the light diffusion space may be reduced and a hot spot may occur. If it is greater than the thickness range, spatial installation restrictions and design freedom may be reduced due to the module thickness. I can. According to the embodiment, the thickness t0 of the lighting device 100 is provided with a thickness of 3.2 mm or less, for example, 3 mm or less, thereby enabling a curved structure, thereby reducing design freedom and spatial restrictions.

The lighting device 100 can be applied to various modules or lamp devices that require lighting, such as vehicle lamps, home lighting devices, and industrial lighting devices. For example, in the case of lighting modules applied to vehicle lamps, head lamps, vehicle width lights, side mirror lights, fog lights, tail lamps, turn signal lamps, back up lamps, and stop lamps ), Daytime running right, vehicle interior lighting, door scarf, rear combination lamp, backup lamp, etc.

<Substrate (11)>

The substrate 11 may include a printed circuit board (PCB) having wiring. The substrate 11 may include, for example, a resin-based printed circuit board (PCB), a metal core PCB, a flexible PCB, a non-flexible PCB, a ceramic PCB, or an FR-4 substrate. have.

The substrate 11 includes a wiring layer (not shown) thereon, and the wiring layer may be electrically connected to the light sources 21 and 23. When a plurality of light sources 21 and 23 are arranged on the substrate 11, the plurality of light sources 21 and 23 may be connected in series, parallel, or in series-parallel by the wiring layer. The substrate 11 may function as a base member or a support member positioned under the light sources 21 and 23, the resin layer 41 and the phosphor layer 51.

The length (a1) of the first direction (X) and the length (a2) of the second direction (Y) of the substrate 11 may be the same or different, and the first direction (X) and the second direction (Y ) May be directions orthogonal to each other. The length a1 in the first direction may be equal to or longer than the length a2 in the second direction. The thickness of the substrate 11 may be 0.5 mm or less, for example, 0.3 mm to 0.5 mm. Since the thickness of the substrate 11 is provided to be thin, the thickness of the lighting module may not be increased. In the lighting device 100, a plurality of light sources 21 and 23 may be arranged in N columns (N is an integer of 2 or more). The plurality of light sources 21 and 23 may be arranged in N columns and M rows (N and M are integers of 2 or more). The plurality of light sources 21 and 23 may be disposed adjacent to at least one side of the side surfaces of the substrate 11, two side surfaces opposite to each other, different side surfaces, or the front side surfaces of the substrate 11.

The substrate 11 may be provided with a connector in a part to supply power to the light sources 21 and 23. A region in which the connector is disposed on the substrate 11 is a region in which the resin layer 41 is not formed, and may be a partial region of the substrate 11. When the connector is disposed on the bottom of the substrate 11, the region may be removed. The substrate 11 may have a rectangular top view, a square shape, or another polygonal shape, and may be a bar shape having a curved shape. The substrate 11 may include a member having a protective layer or a reflective layer thereon. The protective layer or the reflective layer may include a member having a solder resist material, and the solder resist material is a white material, and may reflect incident light.

<Resin layer (41)>

The resin layer 41 may be disposed on the substrate 11. The light sources 21 and 23 may be disposed on the substrate 11. The light sources 21 and 23 and the phosphor layer 51 may be disposed on the substrate 11. The light sources 21 and 23 may be covered or sealed with the resin layer 41. The light sources 21 and 23 and the phosphor layer 51 may be covered or sealed with the resin layer 41. The light sources 21 and 23 are adjacent to at least one side (S1, S2) of the side surfaces (S1, S2, S3, S4) of the resin layer 41, adjacent to at least two side surfaces, or two different side surfaces It may be disposed adjacent to, or adjacent to all sides.

The side surfaces (S1, S2, S3, S4) of the resin layer 41 include first and second side surfaces S1 and S2 disposed opposite to each other, and third and fourth side surfaces S3 disposed opposite to each other. S4) may be included. At least one or two or more of the first to fourth side surfaces S1, S2, S3, S4 may be a flat or curved surface having a long length in one direction (eg, Y). For example, the first and second side surfaces S1 and S2 extend in a long length in the second direction Y, and the third and fourth side surfaces S3 and S4 have a long length in the first direction X. Can be extended to At least one or two or more of the side surfaces S1, S2, S3, and S4 of the resin layer 41 may be the same vertical plane as the side surface of the substrate 11. At least one or two or more of the side surfaces S1, S2, S3, and S4 of the resin layer 41 may be disposed inside the side surface of the substrate 11. The upper area of the resin layer 41, that is, the inner area formed by the side surfaces S1, S2, S3, S4 of the resin layer 41 may be an area from which light is emitted or an area of illumination, and the light source ( 21, 23) may vary depending on the number or arrangement. The upper surface or/and side surfaces of the resin layer 41 may be a surface from which light is emitted, for example, light may be emitted through the upper surface.

The upper surface of the resin layer 41 may be a flat horizontal surface, or may include a concave surface or a convex surface. A corner portion between the upper surface of the resin layer 41 and each side surface (S1, S2, S3, S4) may be an angled surface or a curved surface. The resin layer 41 may be adhered to the upper surface of the substrate 11 or may be adhered to the substrate 11 and the reflective layer 31 as shown in FIG. 3.

The resin layer 41 may be formed of a transparent material. The resin layer 41 may include a transparent resin material or plastic material such as silicone or epoxy. The resin layer 41 may be a transparent resin material, for example, a resin material such as UV (Ultra violet) resin, epoxy, or silicone. The UV resin may be, for example, a resin (oligomer type) containing a urethane acrylate oligomer as a main material. For example, it is possible to use a synthetic oligomer urethane acrylate oligomer. The main material may further include a monomer in which a low boiling point dilution reactive monomer such as IBOA (isobornyl acrylate), HBA (Hydroxybutyl Acrylate), HEMA (Hydroxy Metaethyl Acrylate), and the like are mixed, and a photoinitiator (such as 1-hydroxycyclohexyl) as an additive. Phenyl-ketone, Diphenyl), Diphwnyl (2,4,6-trimethylbenzoyl phosphine oxide), or an antioxidant may be mixed. The UV resin may be formed of a composition comprising 10 to 21% oligomer, 30 to 63% monomer, and 1.5 to 6% additive. In this case, the monomer may be composed of a mixture of IBOA (isobornyl Acrylate) 10 to 21%, HBA (Hydroxybutyl Acrylate) 10 to 21%, and HEMA (Hydroxy Metaethyl Acrylate) 10 to 21%. The additive may be formed into a mixture capable of improving the yellowing phenomenon by adding 1 to 5% of a photoinitiator to initiate photoreactivity, and adding 0.5 to 1% of an antioxidant. The resin layer 41 using the above-described composition is formed of a resin such as silicone, epoxy or UV resin instead of the light guide plate, so that the refractive index and thickness can be easily adjusted, and adhesive properties, reliability, and mass production speed can be satisfied. As another example, a diffusing agent may be added to the resin layer 41 to diffuse light. The diffusion agent may include at least one of PMMA (Poly Methyl Meth Acrylate) series, TiO ₂ , SiO ₂ , Al ₂ O ₃ , and silicon series. When the diffusing agent is added, it may be in contact with or without contact with the phosphor layer 51.

<Light source (21,23)>

The plurality of light sources 21 and 23 may include a plurality of first light sources 21 or/and a plurality of second light sources 23. The first light source 21 may be adjacent to or face the first side surface S1 of the resin layer 41. The second light source 23 may be adjacent to or face the second side surface S2 of the resin layer 41. When the illumination area of the resin layer 41 is small, either of the first or second light sources 21 and 23 may be removed, or the number of each light source 21 and 23 may be reduced. The first light source 21 may be disposed in at least one row on the first region of the substrate 11. The second light sources 23 may be disposed in at least one row on the second region of the substrate 11. Any one of the first or second light sources 21 and 23 may be arranged in two or more rows. The plurality of first light sources 21 may be defined as a first light emitting part, and the plurality of second light sources 23 may be defined as a second light emitting part. When the first and second light sources 21 and 23 are arranged in an N×M matrix on the substrate 11, N may be one or two or more rows, and M may be one or two or more columns.

The light sources 21 and 23 have an upper surface and a plurality of side surfaces, and the upper surface faces an upper surface of the resin layer 41 to emit light, and the plurality of side surfaces may emit light in different directions. At least one or two or more of the side surfaces of the light sources 21 and 23 may emit light in the inner direction of the resin layer 41. That is, since the light sources 21 and 23 emit light through the upper surface or/and the side surface, at least five surfaces may emit light. The light sources 21 and 23 may be LED chips or may include at least one LED chip. The light sources 21 and 23 may be disposed on the substrate 11 in a flip chip shape. The light sources 21 and 23 may be formed to have a thickness of 0.4 mm or less or 0.2 mm to 0.36 mm. As another example, the light sources 21 and 23 may be implemented as a horizontal chip or a vertical chip. Here, in the case of the horizontal chip or the vertical chip, since the wire is connected to another chip or wiring pattern, the thickness of the resin layer 41 may be increased due to the height of the wire, and a connection space may be required according to the length of the wire. have. As another example, the light sources 21 and 23 may include a top view type package or a side view type package including an LED chip. The package includes a body or a reflective body disposed around the LED chip, and it is possible to adjust the beam angle of the LED chip and protect the LED chip. The light sources 21 and 23 in the form of such a package may emit light in one direction or one surface. The light sources 21 and 23 may emit blue light. As another example, the light sources 21 and 23 may emit at least one or two or more of blue, green, red, or white light. The first light source 21 may emit at least one of blue, green, red, or white light. The second light source 23 may emit at least one of blue, green, red, or white light. At least one of the light sources 21 and 23 may emit ultraviolet (UV) or infrared rays. The light sources 21 and 23 may optionally include a compound semiconductor layer of a group II to VI element, for example, a compound semiconductor layer of a group III-V element or a compound semiconductor layer of a group II-VI element. A support member having a ceramic support member or a metal plate may be disposed under the light sources 21 and 23, and the support member may be used as an electric conduction and heat conduction member.

<phosphor layer 51>

The phosphor layer 51 according to an embodiment of the present invention may be spaced apart from the light sources 21 and 23 in a horizontal direction. The phosphor layer 51 may be disposed between the substrate 11 and the resin layer 41. The phosphor layer 51 and the light sources 21 and 23 may not overlap in a vertical direction. The phosphor layer 51 and the light sources 21 and 23 may overlap in a horizontal direction. The upper surface area of the phosphor layer 51 may be 50% or more or 60% or more of the upper surface area of the resin layer 41.

The phosphor layer 51 may be disposed in a center region rather than a side surface or an edge of the substrate 11. The phosphor layer 51 may be disposed in a center region or an inner region of the substrate 11 than the light sources 21 and 23. The phosphor layer 51 may be spaced apart from the first light source 21 or/and the second light sources 23 in a center direction of the substrate 11. The phosphor layer 51 may be disposed between the first light sources 21 and the second light sources 23. The phosphor layer 51 may be disposed between a straight line passing through the first light sources 21 and a straight line passing through the second light sources 23. Each side (S11, S12, S13, S14) of the phosphor layer 51 may face each side (S1, S2, S3, S4) of the resin layer (41). At least one or two or more of each surface (S11, S12, S13, S14) of the phosphor layer 51 may be provided in a linear shape or a curved shape extending in one direction.

The phosphor layer 51 includes first to fourth surfaces S11, S12, S13, S14, and the first surface S11 faces the first side surface S1 of the resin layer 41 or Adjacent, and the second surface (S12) faces or is adjacent to the second side surface (S2) of the resin layer 41, and the third surface (S13) is a third side surface (S3) of the resin layer 41 ) Faces or is adjacent, and the fourth surface S14 may face or be adjacent to the fourth side surface S4 of the resin layer 41. Here, among the first to fourth surfaces S11, S12, S13, and S14, surfaces facing the light sources 21 and 23 or adjacent to the light sources 21 and 23 may be defined as incident surfaces. For example, the first surface S11 facing the first light source 21 may be a first incident surface. The second surface S12 facing the second light source 23 may be a second incident surface. As another example, as shown in FIG. 20, when light sources 21, 23, 24, and 25 are disposed around the phosphor layer 51, the first to fourth surfaces S11, S12, S13, S14 are It may be an incident surface on which light is incident.

The first surface S11 of the phosphor layer 51 may be a surface facing the first light source 21 or a surface facing the first side surface S1 of the resin layer 41. The second surface S12 of the phosphor layer 51 may be a surface facing the second light source 23 or a surface facing the second side surface S2 of the resin layer 41. The first surface S11 and the second surface S12 may be opposite or adjacent to each other in the phosphor layer 51. The phosphor layer 51 converts light incident through the upper surface and the incident surface of the phosphor layer 51 into wavelength.

Here, the plurality of first light sources 21 or the first light emitting part may be disposed between the first side surface S1 of the resin layer 41 and the first surface S11 of the phosphor layer 51. . The plurality of second light sources 23 or the second light emitting portion may be disposed between the second side surface S2 of the resin layer 41 and the second surface S12 of the phosphor layer 51. As shown in FIG. 20, a plurality of third light sources 24 may be disposed between the third side surface S3 of the resin layer 41 and the third surface S13 of the phosphor layer 51. The plurality of fourth light sources 25 may be disposed between the fourth side surface S4 of the resin layer 41 and the fourth surface S14 of the phosphor layer 51.

The phosphor layer 51 may include a phosphor for desired illumination light. For example, the phosphor layer 51 may include at least one of yellow and red phosphors. As another example, the phosphor layer 51 may include at least one or two or more of a blue phosphor, a green phosphor, a red phosphor, a purple phosphor, and a yellow phosphor. The phosphor layer 51 may include the phosphor added in a resin material. The size of the phosphor may range from 1 μm to 100 μm. The higher the density of the phosphor, the higher the wavelength conversion efficiency may be, but since the luminous intensity may decrease, it may be added in consideration of the luminous efficiency within the above size. The resin material of the phosphor layer 51 may include a transparent resin material such as silicone, UV resin, or epoxy, or a plastic material. The phosphor layer 51 may include a diffusion agent, and the diffusion agent may be added in an amount smaller than that of the phosphor. The diffusion agent may include at least one of PMMA (Poly Methyl Meth Acrylate) series, TiO ₂ , SiO ₂ , Al ₂ O ₃ , and silicon series. The diffusion agent may not be added in the phosphor layer 51.

The phosphor layer 51 may be formed on the substrate 11 or the reflective layer 31 (refer to FIG. 3) by a printing method. The thickness of the phosphor layer 51 may be smaller than the thickness t2 of the resin layer 41. The thickness of the phosphor layer 51 may be 30 micrometers or more, for example, 30 to 150 micrometers or 50 to 100 micrometers. When the thickness of the phosphor layer 51 is smaller than the above range, the wavelength conversion efficiency may be reduced, and when the thickness of the phosphor layer 51 is thicker than the above thickness, the improvement in the wavelength conversion efficiency may be negligible. The thickness of the phosphor layer 51 may be smaller than the thickness t1 of the light sources 21 and 23 or the thickness of the LED chip. The upper surface of the phosphor layer 51 may be disposed lower than the thickness t1 of the light sources 21 and 23 or the upper surface of the LED chip.

The length f1 of the phosphor layer 51 in the first direction X may be 50% or more of the length a1 in the first direction of the substrate 11 or the resin layer 41, for example, the length ( f1) may range from 50% to 85% of the length a1. The length f1 of the phosphor layer 51 in the first direction X may be 80% or more of the distance f0 between the first and second light sources 21 and 23. The length (f2) of the phosphor layer 51 in the second direction (Y) may be 60% or more of the length (a2) of the substrate 11 or the resin layer 41 in the second direction, for example, the length ( f2) may range from 60% to 95% of the length a2. The lengths f1 and f2 of the phosphor layer 51 in the first and second directions may vary depending on the light emitting area and the arrangement of the light sources 21 and 23, and may be the minimum length in each direction. Here, in the phosphor layer 51, the length in the direction in which the first and second light sources 21 and 23 correspond (eg, f1) is the length in the direction in which the light sources 21 and 23 are arranged (eg, f2) Can be placed longer.

The length f1 of the phosphor layer 51 in the first direction X may be smaller than the first interval f0 between the first and second light sources 21 and 23. The first gap f0 between the first and second light sources 21 and 23 may be greater than the thicknesses t2 and t2 <f0 of the resin layer 41. The first interval f0 may be 4mm or more, for example, in the range of 4mm to 25mm or in the range of 4mm to 20mm. The first interval f0 may be a minimum distance between the first light source 21 and the second light source 23. The first interval f0 may be two or more times greater than the second intervals d0 and d1 of each of the light sources 21 and 23. The second intervals d0 and d1 are the intervals in the second direction of the first light source 21 or the second light sources 23. The second intervals d0 and d1 of the first and second light sources 21 and 23 may be the same or different from each other. The second intervals d0 and d1 of each of the light sources 21 and 23 may be greater than the third intervals d2 and d3. Here, the third interval (d2, d3) is a distance between the first light source 21 and the first surface (S11) of the phosphor layer 51, or the second light source 23 and the phosphor layer ( It may be a distance between the second surfaces S12 of 51). The third intervals d2 and d3 may be the minimum distance between the phosphor layer 51 and the light sources 21 and 23, and may be 3 mm or less, for example, 2 mm to 3 mm. The third intervals d2 and d3 may be the same as or different from each other. If the third interval (d2, d3) is larger than the range, the incidence efficiency of light may be lowered, and if it is smaller than the range, the light has an abnormal optical path or is hot on the surface of the region having the third interval (d2, d3). Spots may occur. The third interval (d2, d3) may be less than 0.6 times the second interval (d0, d1), for example, may be in the range of 0.4 times to 0.6 times. The second intervals d0 and d1 may be in the range of 1.8 times or more, for example, 1.8 times to 2.2 times the third interval d2 and d3. When the first and second light sources 21 and 23 are arranged in the second direction, the third interval d2 and d3 reduces optical interference between adjacent light sources together with the second interval d0 and d1. I can.

Here, when there is no light source on the third and fourth side surfaces S3 and S4 of the resin layer 41, the third surface S13 of the phosphor layer 51 is a third surface than the light sources 21 and 23. The fourth surface S14 may be disposed closer to the side surface S3, and the fourth surface S14 may be disposed closer to the fourth side surface S4 than the light sources 21 and 23.

The first light sources 21 may have the same distance b1 as the first side surface S1 of the resin layer 41, or at least one may have a different distance. The second light source 23 may have the same distance as the second side surface S2 of the resin layer 41, or at least one of the second light sources 23 may have a different distance. The first and second light sources 21 and 23 may be disposed closer to the first and second side surfaces S1 and S2 of the resin layer 41 than the phosphor layer 51. The plurality of first light sources 21 may be connected to each other in series or connected in parallel to be driven. The plurality of second light sources 23 may be connected to each other in series or connected in parallel to be driven. The first and second light sources 21 and 23 may be driven individually or simultaneously.

The first and second light sources 21 and 23 may be disposed facing each other in a first direction. As shown in FIG. 14, the first light sources 21 and the second light sources 23 may be disposed to be shifted from each other in the first direction. Light emitted from the first and second light sources 21 and 23 may be guided through the resin layer 41 and converted into wavelength by the phosphor layer 51. The occurrence of dark areas in the illumination area corresponding to the phosphor layer 51 can be suppressed by the first gap f0 between the first and second light sources 21 and 23, and uniform light uniformity is provided. can do.

For example, when the illumination device 100 is provided as light whose color of the illuminated light is wavelength-converted, the wavelength conversion efficiency by the phosphor layer 51 should be increased and the light intensity should be provided in a structure that lowers the light intensity. That is, looking at the amount of light emitted through the resin layer 41, the light emitted through the light sources 21 and 23 is the first light, and the light converted by the phosphor layer 51 is the second light. And the amount of light of the second light in the illuminated area may be greater than that of the first light. That is, in order to increase the wavelength conversion efficiency of converting the first light into second light by the phosphor layer 51, the content of the phosphor may be increased. The content of the phosphor added to the phosphor layer 51 may be 60 wt% or less relative to the weight of the phosphor layer 51, for example, 20 wt% to 60 wt% or 40 wt% to 60 wt%. As a comparative example, when a phosphor layer having a high phosphor content is disposed on the resin layer, loss or luminance when the first light emitted from the light source transmits may be reduced. Therefore, by arranging the light sources 21 and 23 in the edge region of the phosphor layer 51, direct emission of the first light from the light sources 21 and 23 toward the top surface of the phosphor layer 51 is blocked or Can be suppressed. By providing the phosphor layer 51 having high wavelength conversion efficiency on the bottom of the resin layer 41, the second light converted by the phosphor layer 51 may be emitted as a surface light source.

In the embodiment of the present invention, since the phosphor layer 51, the resin layer 41, and the light sources 21 and 23 are provided in the above structure, the thickness of the lighting device 100 or module can be provided as thin as 3.3 mm or less. And, it can improve the luminous intensity of the surface light source. In addition, light loss on the resin layer 41 may be reduced. In addition, since the light sources 21 and 23 are disposed in the edge area of the phosphor layer 51, the number of light sources may be reduced since the light sources 21 and 23 do not need to be disposed in all areas. In addition, since the light sources 21 and 23 are exposed to the surface of the lighting device 100 or the module when viewed from the outside, or the phosphor layer 51 is not exposed, it is possible to improve the emotional quality when not lit.

Referring to FIG. 3, the reflective layer 31 may be disposed between the upper surface of the substrate 11 and the resin layer 41. The reflective layer 31 may be disposed between an upper surface of the substrate 11 and a lower surface of the resin layer 41 and the phosphor layer 51. The reflective layer 31 may be disposed at a position spaced apart from the side surface of the substrate 11, thereby preventing a problem in which the resin layer 41 is lifted from the edge of the substrate 11. The reflective layer 31 may be disposed in a range of 0.2 mm or less, for example, 0.1 mm to 0.2 mm. When the reflective layer 31 is larger than the above range, light absorption or improvement in reflection efficiency may be insignificant, and when it is smaller than the above range, the reflection distribution may be irregular or reflection efficiency due to light transmission may be reduced. The reflective layer 31 may be adhered or adhered between the resin layer 41 and the substrate 11. The reflective layer 31 may be provided as a film made of any one of a resin material, transparent PET, white polyethylene terephthalate (PET), and Ag sheet. The reflective layer 31 may include any one of TiO ₂ , CaCO ₃ , BaSO ₄ , Al ₂ O ₃ , Silicon, and PS on the inside or/and the surface.

The reflective layer 31 may include a through hole through which the lower portions of the light sources 21 and 23 are inserted. Each of the light sources 21 and 23 may be disposed or two or more may be disposed in the through hole, and a part of the resin layer 41 may be disposed.

4 and 5 are another example of the lighting device disclosed above, a plan view and a side cross-sectional view thereof, and FIG. 6 is a partially enlarged view of FIG. 4. In describing FIGS. 4 to 6, the same configuration as the above-described configuration may be selectively included or combined with the structure of another example, and redundant descriptions will be omitted.

4 to 6, the lighting device 100 includes a substrate 11, a resin layer 41, a phosphor layer 51, and a light source 21 and 23 on at least one side of the phosphor layer 51. It may include a light emitting unit having.

The phosphor layer 51 may have a surface corresponding to the light source 21 and 23 or an incident surface including a recess. For example, the phosphor layer 51 is recessed in at least one or both of the first surface S11 corresponding to the first light source 21 or the second surface S12 corresponding to the second light source 23 (R1, R2) may be included. The first surface S11 may include a plurality of first recesses R1. The second surface S12 may include a plurality of second recesses R2. The first recess R1 may correspond to each region of the plurality of first light sources 21 or may correspond to at least two or more regions. The second recess R2 may correspond to each of the plurality of second light sources 23 or may correspond to at least two or more regions.

The first recess R1 may be concave or recessed in a direction from an outer end of the first surface S11 to a second surface. The second recess R2 may be concave or recessed in the direction of the first surface from the outer end of the second surface S12. The depth of the first and second recesses R1 and R2 is the shortest distance between the first light source 21 and the first surface S11 and between the second light source 23 and the second surface S12. It may be equal to or smaller than the third interval (d2, d3). The first and second surfaces S11 and S12 having the first and second recesses R1 and R2 may include concave curved surfaces. The first and second surfaces S11 and S12 having such a concave curved surface face each of the light sources 21 and 23, and the incident area may be increased, thereby increasing light incident efficiency. The concave curved surface in each of the recesses R1 and R2 may include a continuous hemispherical shape, a semi-elliptical shape, or a semicircular shape having an aspherical shape. Here, the radius of the first and second recesses (R1, R2) is smaller than the second interval (d0, d1) between the light sources (21, 23) and may be equal to or greater than the third interval (d2, d3). have.

The phosphor layer 51 may include a plurality of first and second protrusions P1 and P2. The first protrusion P1 may be disposed between or outside the plurality of first recesses R1, or may protrude in the direction of the first side surface S1 of the resin layer 41. The second protrusion P2 may be disposed between or outside the plurality of second recesses R2, or may protrude in the direction of the second side surface S2 of the resin layer 41. The plurality of first recesses R1 may be spaced apart or separated by the first protrusions P1. The plurality of second recesses R2 may be spaced apart or separated by the second protrusions P2. Each of the first protrusions P1 may protrude into a region between the first light sources 21, thereby blocking optical interference between adjacent first light sources 21, and concave a path of incident light. It can be changed in the direction of the 1 side (S11). Each of the second protrusions P2 may protrude into a region between the second light sources 23 to block optical interference between adjacent second light sources 23, and a concave path of incident light It can be changed in the direction of the 2 side (S12).

The length f1 in the first direction of the phosphor layer 51 is a maximum length, and may be 50% or more of the length a1 in the first direction of the substrate 11 or the resin layer 41, for example, the length (f1) may range from 50% to 85% of the length (a1). The minimum length f4 in the first direction of the phosphor layer 51 may be smaller than the length f1 and may be smaller than the first interval f0 between the first and second light sources 21 and 23. .

The lighting device or lighting module disclosed above may include a light-transmitting member or/and an ink layer. The lighting device or the lighting module disclosed above may have a housing coupled to the outer periphery. 7 is a side cross-sectional view showing an example in which a translucent member is disposed on the resin layer of the invention, and FIG. 8 is an example in which an ink layer is disposed on the resin layer of the invention.

Referring to FIG. 7, the light-transmitting member 91 may be spaced apart from the surface of the resin layer 41 or disposed adjacent to the resin layer 41. The light-transmitting member 91 may include an inner lens or/and an outer lens. The light-transmitting member 91 may have convex convex portions arranged on an upper surface or/and a lower surface thereof, so that the condensing efficiency of incident light may be adjusted. The light-transmitting member 91 may be formed of a colored material, for example, may be formed of a material having the same color as the color of light converted by the phosphor layer 51. The transmissive member 91 blocks or reflects the first light emitted from the light sources 21 and 23, and emits second light converted by the phosphor layer 51. The translucent member 91 may be disposed on the entire area of the resin layer 41 and may overlap the light sources 21 and 23 in a vertical direction. Accordingly, the light-transmitting member 91 blocks the first light directly incident through the light sources 21 and 23 and emits the wavelength-converted second light, thereby removing the hot spot caused by the first light. And improve the uniformity of light. The translucent member 91 may include a plastic material or a glass material.

Referring to FIG. 8, the ink layer 61 may be disposed on the resin layer 41. The ink layer 61 may be deposited or dispensed on the upper surface of the resin layer 41. The ink layer 61 may have a color series of the phosphor layer 51. The ink layer 61 may include ink particles therein. The ink particles may include at least one of metal ink, UV ink, or curing ink. The size of the ink particles may be smaller than the size of the phosphor. The surface color of the ink particles may be any one of green, red, yellow, and blue. The ink types are PVC (Poly vinyl chloride) ink, PC (Polycarbonate) ink, ABS (acrylonitrile butadiene styrene copolymer) ink, UV resin ink, epoxy ink, silicone ink, PP (polypropylene ) ink, water-based ink, plastic ink, PMMA. It can be selectively applied from (poly methyl methacrylate) ink and PS (polystyrene ) ink. Here, the width or diameter of the ink particles may be 5 μm or less, or may range from 0.05 μm to 1 μm. At least one of the ink particles may be smaller than a wavelength of light. The color of the ink particles may include at least one of red, green, yellow, and blue. For example, the phosphor emits a red wavelength, and the ink particles may include red. For example, the red color of the ink particles may be darker than the color of the phosphor or the wavelength of light. The ink particles may have a color different from the color of light emitted from the light sources 21 and 23. The ink particles may have an effect of blocking or blocking incident light. The ink particles may include the same color series as the phosphor. The thickness of the ink layer 61 may be provided to be thinner than that of the phosphor layer 51.

Since the ink layer 61 is provided on the upper surface of the resin layer 41, it may be provided in the color of ink particles when viewed from the outside. Accordingly, in a lamp such as a lighting device, there is no difference in color sense between an appearance image when turned on and an exterior image when not lit, or can be reduced. The ink layer 61 may or may not include a phosphor therein.

9, the ink layer 61 may extend from the upper surface of the resin layer 41 in the direction of the substrate. The side portions 61A of the ink layer 61 may extend to each side of the resin layer 41. Since the ink layer 61 covers the top and side surfaces of the resin layer 41, an external image can be provided as a color color of the wavelength-converted second light. The lower end of the side portion 61A of the ink layer 61 may contact the upper surface of the substrate 11 or may contact the reflective layer disclosed above. Accordingly, the ink layer 61 may suppress moisture penetration or reduce light loss emitted to each side of the resin layer 41.

Referring to FIG. 10, the thickness of the phosphor layer 51 may change toward the first and second side surfaces S1 and S2 of the resin layer 41 with the center 51C as the center. For example, the phosphor layer 51 may include a region in which the thickness increases or/and a region in which the thickness decreases. The rate of increasing or decreasing the thickness may be gradual or stepwise. The phosphor layer 51 may include first and second fluorescent portions 51A and 51B disposed on both sides of the center 51C. The first fluorescent part 51A is an area between the first surface S11 and the center 51C adjacent to the first light source 21, and the second fluorescent part 51B is the second light source 23 It may be an area between the second surface S12 adjacent to and the center 51C. The first fluorescent part 51A may have a thickness increased from the first surface S11 to the center 51C. The thickness of the second fluorescent part 51B may be increased from the second surface S12 toward the center 51C. That is, since the phosphor layer 51 has a lower thickness or height of the first and second surfaces S11 and S12 than the center 51C, the incidence efficiency of light emitted from the light sources 21 and 23 is increased. I can. Since the surface area of the upper surface of the phosphor layer 51 may be increased, wavelength conversion efficiency may be increased, and light extraction efficiency may also be increased due to the concave surfaces of the first and second fluorescent parts 51A and 51B. have.

Referring to FIG. 11, the housing 71 may have an opening 75 and may be disposed around the outside of the resin layer 41. The housing 71 may be a part of the lighting device disclosed above or may be a separate configuration. The housing 71 may include a lower cover 72 that is a side portion covering the side surface of the resin layer 41 and an upper or upper cover 73 having an opening 75. The lower cover 72 may overlap the resin layer 41 and the light sources 21 and 23 in a horizontal direction. The lower cover 72 of the housing 71 overlaps the resin layer 41 in the first and second directions and may reflect light leaking through the side surfaces of the resin layer 41. The lower cover 72 of the housing 71 may be disposed on an edge of the upper surface of the substrate 11. The lower cover 72 of the housing 71 may overlap the upper surface of the substrate 11 in a vertical direction. The upper cover 73 of the housing 71 covers the upper region of the resin layer 41 except for the opening 75.

The upper cover 73 of the housing 71 may be extended or bent from the lower cover 72 in the direction of the opening 75. The upper cover 73 of the housing 71 may be disposed above the first light source 21 and the second light source 23. The upper cover 73 of the housing 71 may be disposed on the first and second light emitting units.

The upper cover 73 of the housing 71 may overlap with the first light source 21 and the second light source 23 in a vertical direction, so that the top cover 73 of the first and second light sources 21 and 23 Hot spots can be avoided. The width g1 of the upper cover 73 of the housing 71 is less than the distance between the light sources 21 and 23 from the outer side of the resin layer 41 (e.g., b1 (see FIGS. 2 and 5)). Can be provided widely. The thickness of the upper cover 73 of the housing 71 may be 0.5 mm or more, for example, in the range of 0.5 to 2 mm, so that upper separation may be prevented.

The upper cover 73 of the housing 71 may be bent in a direction orthogonal to the lower cover 72 of the housing 71, or may be inclined or extended with a curved surface as described later. Since the housing 71 is disposed to surround the side surface and the upper circumference of the resin layer 41, light loss in the lateral direction may be reduced, and light may be condensed toward the opening 75 to be emitted. The housing 71 may include a reflective material or a material that blocks light. The housing 71 may include at least one of a plastic material, such as PC, PP, ABS, PBT, and PET. As another example, the housing 71 may include at least one of a metal material, such as aluminum, silver, and copper.

The housing 71 may be coupled to a bracket of a lamp together with a lighting device having the resin layer 41 and the phosphor layer 51. The lower cover 72 of the housing 71 may be bonded to the substrate 11 with an adhesive or may be coupled with a screw fastening member. The inner surfaces of the lower cover 72 and the upper cover 73 of the housing 71 may be bonded to the resin layer 41 with an adhesive. Alternatively, between the housing 71 and the resin layer 41 may be disposed with a predetermined air gap. The coupling between the housing 71 and the resin layer 41 may be fastened with a separate screw fastening member.

At least one of the resin layer 41 and/or the ink layer 61 may be exposed through the opening 75 of the housing 71. The phosphor layer 51 may overlap the opening 75 in a vertical direction. The width f5 of the opening 75 of the housing 71 may be equal to or smaller than the first distance f0 between the first and second light sources 21 and 23 in a first direction. The width f5 of the opening 75 may be equal to or greater than 80% of the minimum length of the phosphor layer 51 in the first direction. The length of the opening 75 in the second direction may be equal to or greater than 80% of the length of the phosphor layer 51 in the second direction. That is, the opening 75 may reduce a problem in which an area other than the phosphor layer 51 is exposed or the light sources 21 and 23 are exposed. The resin layer 41 or/and the ink layer 61 may not protrude from the opening 75.

In an exemplary embodiment of the present invention, since the housing 71 is coupled to the substrate 11, it may be easy to separate or combine the lighting device or module. In addition, by using the housing 71 to move or fix the lighting device or module, there is a convenient effect of a process of combining the lighting device or module. In addition, a work process through the housing 71 may be convenient. In an embodiment of the present invention, by combining the housing 71 with a device or module having light sources 21 and 23, durability and assembly properties of the module may be improved, and advantageous effects may be provided when designing or changing the device. . In addition, by providing a device or module having the housing 71, it is possible to provide an advantageous effect when fixing or supporting the flexible module when it is deformed.

As shown in FIG. 12, the upper portion 41A of the resin layer 41 may protrude toward the opening 75 of the housing 71. The upper portion 41A of the resin layer 41 may protrude more than the upper surface of the upper cover 73. Here, the housing 71 may be assembled or combined after the resin layer 41 is formed. In this case, light may be emitted through the upper side, that is, the protruding side of the resin layer 41.

Here, when the ink layer 61 is disposed on the resin layer 41, a part of the ink layer 61 is exposed to the outside of the opening 75 at the upper portion 41A of the resin layer 41 Can be. In such a lighting device or module, wavelength-converted light may be emitted through the phosphor layer 51 through the opening 75 of the housing 71.

Referring to FIG. 13, the upper portion 41A of the resin layer 41 may protrude through the opening 75 of the housing 71, and may have the same height as or different from the upper surface of the upper cover 73. have. A light shielding layer 62 may be disposed on an upper surface of the resin layer 41 overlapping the light sources 21 and 23, and the light shielding layer 61 may include an upper cover 73 of the housing 71 and the resin. It may be disposed between the layers 41. The light blocking layer 61 may reflect or absorb light traveling upward from the light sources 21 and 23. The light blocking layer 61 may be formed of the ink layer disclosed above or may be formed of a white resin material.

Referring to FIG. 14, a plurality of first light sources 21 and a plurality of second light sources 23 disposed in regions opposite to each other may be disposed on different lines or may be disposed to deviate from each other. That is, the second light source 23 may correspond to each region between the plurality of first light sources 21. Accordingly, since the first light source 21 and the second light source 23 irradiate light in a path that is shifted from each other, light having a uniform distribution can be irradiated to the entire area of the phosphor layer 51. In this structure, the second recess R2 may correspond to each of the regions between the plurality of first recesses R1.

Referring to FIG. 15, the first light-emitting portion includes a plurality of first light sources 21 and third light sources 21A in front of the first surface S11 of the phosphor layer 51, and the first light source The (21) and the third light source (21A) may be alternately disposed. The second light emitting part includes a plurality of second light sources 23 and a fourth light source 23A in front of the second surface S12 of the phosphor layer 51, and the second light source 23 and the fourth light source The light sources 23A may be alternately disposed. The first and second light sources 21 and 23 may emit light of the same color or peak wavelength. The third and fourth light sources 21A and 23A may emit light of the same color or peak wavelength, and may emit light of a color different from that of the first and second light sources 21 and 23 or a different peak wavelength.

Each of the first and third light sources 21 and 21A may correspond to the first surface S11 of the phosphor layer 51 or may correspond to the first recess R1. Each of the second and fourth light sources 23 and 23A may correspond to the second surface S12 of the phosphor layer 51 or may correspond to the second recess R2. Accordingly, the phosphor layer 51 can prevent a decrease in incidence efficiency of light emitted through each of the light sources 21, 21A, 23, and 23A. In addition, by providing different types of light sources 21, 21A, 23, and 23A, different signals or lighting effects can be provided.

Referring to FIG. 16, the phosphor layer 51 may include light guide passages Pa and Pb. The light guide passages Pa and Pb may have a long length in a first direction and may be formed of a groove having a thin width or a transparent material. The light guide passages Pa and Pb are one or more first passages Pa extending in the center direction from the first surface S11 adjacent to the first light source 21 and adjacent to the second light source 23. It may include one or a plurality of second passages Pb extending in the center direction from the second surface S12. The first flow path Pa and the second flow path Pb may be connected to or separated from each other. The first flow paths Pa and the second flow paths Pb may be parallel to each other or cross each other. Accordingly, some light emitted through the light sources 21 and 23 may be wavelength converted while flowing along the flow paths Pa and Pb in the center direction of the phosphor layer 51. The flow paths Pa and Pb The phosphor layer 51 may reduce luminous intensity and increase wavelength conversion efficiency.

Referring to FIG. 17, the phosphor layer 51 may include a diffusion agent Pc. In the diffusion agent Pc, a density of a region adjacent to the first and second surfaces S11 and S12 of the phosphor layer 51 may be lower than a density of a center region. Accordingly, a difference in wavelength conversion efficiency in each region of the phosphor layer 51, that is, a center region and a side region may not increase.

Referring to FIG. 18, the width d5 of the first and second recesses R1 and R2 in the phosphor layer 51 may correspond to at least two light source regions, respectively. For example, two or three or more groups of the first light sources 21 may correspond to each of the first recesses R1, and each of the second recesses R2 may correspond to the second light source ( Two or three or more groups of 23) may correspond to each other. The width d5 of the first and second recesses R1 and R2 may be greater than the second interval d0 in the first light sources 21, for example, 1.5 times the second interval d0 It may be more than or equal to 1.5 times to 2 times. The phosphor layer 51 may effectively receive light from light sources in a group through the first and second surfaces S11 and S12 having the first and second recesses R1 and R2. In addition, since the incident area can be increased compared to a structure in which the recess is divided by individual light sources, light loss can be reduced.

Referring to FIG. 19, the phosphor layers 51A and 53 may have a long length in a first direction and may be arranged as a heterogeneous phosphor layer in a second direction. For example, the first phosphor layers 51A and the second phosphor layers 53 may be alternately disposed in the second direction. The width w1 of the first phosphor layer 51A and the second phosphor layer 53 may be the same as the second interval d0 between the light sources 21 and 23. The first phosphor layer 51A and the second phosphor layer 53 may include different phosphors, for example, a red phosphor and a yellow phosphor.

As shown in FIG. 20, when light sources 21, 23, 24, and 25 are disposed around the phosphor layer 51, light is incident on the first to fourth surfaces S11, S12, S13, and S14. It may be an incident surface. The plurality of first and second light sources 21 and 23 will be referred to the description disclosed above. A plurality of third light sources 24 may be disposed between the third side surface S3 of the resin layer 41 and the third surface S13 of the phosphor layer 51. The plurality of fourth light sources 25 may be disposed between the fourth side surface S4 of the resin layer 41 and the fourth surface S14 of the phosphor layer 51.

In the device or module of FIGS. 1 to 20 as described above, the components disclosed above may be combined with other embodiments or modified examples or may be selectively combined.

21 is a perspective view showing another form of a lighting device according to an embodiment of the present invention, and FIG. 22(A)(B) is a view comparing the light uniformity of the comparative example and the invention.

The structure of FIG. 21 may be provided in a shape in which the outer shape of the substrate 11 has a round shape in the lighting device of FIG. 9. A resin layer is disposed on the substrate 11 and an ink layer 61 is disposed on the resin layer. In the case of lighting in such a structure, it can be seen that light can be emitted with light uniformity of 75% or more over the entire area of the phosphor layer, as shown in FIG. 22B, and hot spots are removed. 22A is a comparative example, in which a phosphor layer is disposed on an upper surface of a resin layer and light sources are uniformly distributed over the entire substrate. It can be seen that a hot spot is generated when the comparative example is lit, and has a low luminous intensity and a light uniformity of 30% or less over the entire area. Accordingly, according to an exemplary embodiment of the present invention, hot spots caused by a light source can be removed, and uniform light distribution can be provided over the entire illumination area.

23 is an example of a light emitting device in a lighting module or lighting device according to an embodiment.

Referring to FIG. 23, the light sources 21 and 23 include a light emitting structure 123 and a plurality of bonding parts 121 and 122. The light emitting structure 123 may be formed of a compound semiconductor layer of a group II to VI element, for example, a compound semiconductor layer of a group III-V element or a compound semiconductor layer of a group II-VI element. The plurality of bonding parts 121 and 122 are selectively connected to the semiconductor layer of the light emitting structure 123 and supply power.

The light sources 21 and 23 may include a translucent substrate 124. The light-transmitting substrate 124 is disposed on the light emitting structure 123. The light-transmitting substrate 124 may be, for example, a light-transmitting, insulating, or conductive substrate. The light-transmitting substrate 124 may include, for example, at least one of sapphire (Al ₂ O ₃ ), SiC, Si, GaAs, GaN, ZnO, Si, GaP, InP, Ge, and Ga ₂ O ₃ . A plurality of convex portions (not shown) are formed on at least one or both of the top surface and the bottom surface of the light-transmitting substrate 124, so that light extraction efficiency may be improved. The side cross-sectional shape of each convex portion may include at least one of a hemispherical shape, a semi-elliptic shape, or a polygonal shape. The light-transmitting substrate 124 may be removed.

At least one of a buffer layer (not shown) and a low conductivity semiconductor layer (not shown) may be included between the light-transmitting substrate 124 and the light emitting structure 123. The buffer layer is a layer for alleviating a difference in lattice constant between the light-transmitting substrate 124 and the semiconductor layer, and may be selectively formed from group II to group VI compound semiconductors. An undoped Group III-V compound semiconductor layer may be further formed under the buffer layer, but the embodiment is not limited thereto.

The light emitting structure 123 may be disposed under the light-transmitting substrate 124 and includes a first conductive type semiconductor layer, an active layer, and a second conductive type semiconductor layer. Another semiconductor layer may be further disposed on at least one of the top and bottom of the semiconductor layer, but is not limited thereto. The first conductive type semiconductor layer, the active layer, and the second conductive type semiconductor layer are a group II-VI compound semiconductor or/and a compound semiconductor of a group III-V element, such as GaN, AlN, AlGaN, InGaN, InN, InAlGaN, AlInN , AlGaAs, GaP, GaAs, GaAsP, AlGaInP can be selected from.

As another example of the light emitting structure 123, the first conductive type semiconductor layer may be an n-type semiconductor layer and the second conductive type semiconductor layer may be a p-type semiconductor layer. Conversely, the first conductive type semiconductor layer may be implemented as a p-type semiconductor layer, and the second conductive type semiconductor layer may be implemented as an n-type semiconductor layer. In addition, the light emitting structure 123 may be implemented in any one of an n-p junction structure, a p-n junction structure, an n-p-n junction structure, and a p-n-p junction structure. The light emitting structure 123 may emit at least one of blue, green, red, and UV light. As another example, a phosphor layer may be disposed on the surface of the light emitting structure.

The first and second bonding parts 121 and 122 may be disposed under the light emitting structure 123. The first bonding part 121 is electrically connected to the first conductive type semiconductor layer, and the second bonding part 122 is electrically connected to the second conductive type semiconductor layer. The first and second bonding portions 121 and 122 include electrodes, and a bottom shape thereof may be a polygonal shape or a circular shape. At least one or two or more of an electrode layer, a reflective layer, a diffusion layer, and an insulating layer may be included between the first and second bonding portions 121 and 122 and the light emitting structure 123.

24 is a plan view of a vehicle to which a vehicle lamp to which a lighting module is applied according to an embodiment is applied, and FIG. 25 is a view showing a vehicle lamp having a lighting module or a lighting device disclosed in the embodiment.

24 and 25, in the vehicle 900, the tail light 800 includes a first lamp unit 812, a second lamp unit 814, a third lamp unit 816, and a housing 810. can do. Here, the first lamp unit 812 may be a light source for the role of a direction indicator, the second lamp unit 814 may be a light source for the role of a vehicle width lamp, and the third lamp unit 816 serves as a brake light. It may be a light source for, but is not limited thereto. At least one or all of the first to third lamp units 812, 814, and 816 may include the lighting device or module disclosed in the embodiment. The housing 810 accommodates the first to third lamp units 812, 814, and 816, and may be made of a light-transmitting material. In this case, the housing 810 may have a curvature according to the design of the vehicle body, and the first to third lamp units 812, 814, and 816 may implement a surface light source that may have a curved surface according to the shape of the housing 810. I can. Such a vehicle lamp may be applied to a turn signal lamp of a vehicle when the lamp unit is applied to a tail lamp, a brake lamp, or a turn signal lamp of a vehicle.

Features, structures, effects, and the like described in the above embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, and the like illustrated in each embodiment can be implemented by combining or modifying other embodiments by a person having ordinary knowledge in the field to which the embodiments belong. Accordingly, contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

In addition, although the embodiments have been described above, these are only examples and do not limit the present invention, and those of ordinary skill in the field to which the present invention belongs are illustrated above within the scope not departing from the essential characteristics of the present embodiment. It will be seen that various modifications and applications that are not available are possible. For example, each component specifically shown in the embodiment can be modified and implemented. And differences related to these modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

11: substrate
21,23: light source
41: resin layer
51: phosphor layer
61: ink layer
71: housing
72: lower cover
73: top cover
100: lighting module

Claims (12)

Board;
A phosphor layer disposed on the substrate;
A plurality of light sources disposed on the substrate; And
And a resin layer covering the phosphor layer and the light source on the substrate,
The plurality of light sources include a first light source adjacent to a first side surface of the resin layer and a second light source adjacent to a second side surface of the resin layer,
The phosphor layer is a lighting device disposed between the first light source and the second light source. Board;
A phosphor layer disposed on the substrate;
A plurality of light sources disposed on the substrate; And
And a resin layer covering the phosphor layer and the light source on the substrate,
The phosphor layer is disposed between the substrate and the resin layer,
The plurality of light sources include a first light source disposed between the first side of the resin layer and the first side of the phosphor layer, and a second light source disposed between the second side of the resin layer and the second side of the phosphor layer Including,
A lighting device in which a distance between a first surface and a second surface of the phosphor layer is smaller than a minimum distance between the first light source and the second light source. The method according to claim 1 or 2,
The first light source is arranged in plurality along the first side of the resin layer,
The second light source is a lighting device arranged in plurality along the second side of the resin layer. The method of claim 3,
The phosphor layer is disposed lower than upper surfaces of the first and second light sources,
A lighting device spaced apart from the first and second light sources. The method of claim 4,
The first light source and the second light source are disposed at positions corresponding to each other in a first direction,
The plurality of first light sources and the plurality of second light sources are arranged in a second direction orthogonal to the first direction,
Minimum distances between the plurality of first light sources and the first surface of the phosphor layer are the same,
A lighting device having the same minimum distance between the plurality of second light sources and the second surface of the phosphor layer. The method of claim 4,
The phosphor layer has a length of at least 80% of a minimum distance between the first light source and the second light source in a region between the first and second light sources. The method of claim 6,
The distance between the first surface of the phosphor layer and the plurality of first light sources, or the distance between the second surface of the phosphor layer and the plurality of second light sources is a distance between the plurality of first light sources or the plurality of light sources. The lighting device is smaller than at least one of the intervals between the second light sources of. The method of claim 4,
The first and second light sources are disposed closer to a side surface of the resin layer than the phosphor layer. The method of claim 4,
The first surface of the phosphor layer includes a plurality of first recesses corresponding to each of the plurality of first light sources,
The second surface of the phosphor layer includes a plurality of second recesses corresponding to each of the plurality of second light sources,
The first recess and the second recess are concave in a center direction on the first and second surfaces of the phosphor layer. The method of claim 9,
The minimum distance between the first light source and the first surface having the first recess is smaller than the distance between the first light sources,
A lighting device in which a minimum distance between the second light source and the second surface having the second recess is smaller than a distance between the second light sources. The method of claim 4,
A lighting device including a housing having an opening open at an upper portion of the resin layer and covering upper portions of the first and second light sources around the resin layer. The method of claim 4,
The phosphor layer includes at least one of yellow and red phosphors,
The phosphor layer includes a region in which a thickness of an edge region adjacent to the first and second light sources and a thickness of a center region are different from each other.

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