Illumination module and lighting device including the same

Abstract

To provide a luminaire which prevents reduction in light loss due to a phosphor layer, and which has improved visibility.SOLUTION: A luminaire includes: a lighting module 60 for emitting first light and second light; and a lens 70 arranged on the lighting module, for cutting off short wavelength light out of the first light and the second light, and for allowing the long wavelength light to transmit. The lighting module includes: a substrate 20; a plurality of light emitting elements 30 arranged on the substrate, and for emitting the first light; a resin layer 40 for covering the plurality of light emitting elements; and a phosphor layer 50 arranged on the resin layer, and for converting the first light into the second light. The first light and the second light advance in the lens direction through the phosphor layer, and the second light can transmit the lens.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] An embodiment of the invention relates to a lighting device that includes a light emitting module and a lens.

[0002] An embodiment of the invention relates to a lighting device that provides an area light source. [Background technology]

[0003] Typical lighting applications include vehicle lighting as well as displays and signboards. Includes backlight.

[0004] Light-emitting elements, such as light-emitting diodes (LEDs), have lower power consumption than existing light sources such as fluorescent lamps and incandescent lamps. It has advantages such as low power consumption, semi-permanent lifespan, fast response speed, safety, and environmental friendliness. Such light-emitting diodes are used in various display devices and various lighting devices such as indoor and outdoor lights. It is applied.

[0005] Recently, lamps that use light-emitting diodes have been proposed as vehicle light sources. Compared to heat lamps, light-emitting diodes have the advantage of consuming less power. Since the angle of light emitted from a light emitting diode is small, it is difficult to use a light emitting diode as a vehicle lamp. When using as a lamp using a light-emitting diode, there is a requirement to increase the light-emitting area. In addition, the small size of light-emitting diodes allows for greater freedom in lamp design. It can be used for a long time and is economical due to its semi-permanent lifespan.

[0006] In conventional vehicle lighting modules, in order to form a uniform surface light source, high-temperature A high density phosphor layer is placed on the surface of the light source. Therefore, the light emitted from the light emitting element is reflected or absorbed, and the light extraction efficiency of the lighting module is improved. The problem of deterioration occurs, and in order to prevent the reduction of the light extraction efficiency of the lighting module, When the phosphor layer is disposed, a problem occurs in that it is difficult to form a uniform surface light source. Summary of the Invention [Problem to be solved by the invention]

[0007] The embodiment provides a lighting device that prevents light loss due to the phosphor layer and improves visibility. It is possible.

[0008] The embodiment improves the light extraction efficiency of the lighting module by a lens disposed on the phosphor layer. Therefore, it is possible to provide a lighting device that can realize a uniform surface light source. [Means for solving the problem]

[0009] According to an embodiment of the invention, a lighting device includes a lighting module for emitting a first light and a second light, and a front a light source disposed on the lighting module and blocking light of a short wavelength from among the first light and the second light; and a lens that transmits light of a long wavelength. The lighting module includes a substrate and a plurality of light-emitting elements that emit the first light, and a resin that covers the plurality of light-emitting elements; a resin layer, and a phosphor layer disposed on the resin layer and converting the first light into the second light. The first and second lights travel through the phosphor layer toward the lens. The second light can be transmitted through the lens.

[0010] According to an embodiment of the invention, the lens is a red lens and is spaced apart from the phosphor layer by a predetermined distance. are placed apart.

[0011] According to an embodiment of the invention, the lens is a red lens, and the lower surface of the lens is It can be in contact with the top surface of the phosphor layer.

[0012] According to an embodiment of the invention, the lens comprises a first lens arranged on the phosphor layer; A second lens may be included that is disposed above the first lens.

[0013] According to an embodiment of the invention, the second lens is disposed at a predetermined distance from the first lens. can be.

[0014] According to an embodiment of the invention, the lower surface of the second lens is in contact with the upper surface of the first lens. This can be done.

[0015] According to an embodiment of the invention, the first lens is a red lens and the second lens is transparent. It may be a lens.

[0016] According to an embodiment of the invention, the phosphor content of the phosphor layer is 2% by weight of the phosphor layer. % or more and 10% or less.

[0017] According to an embodiment of the invention, the light efficiency of the first light and the second light passing through the phosphor layer is The optical efficiency of the second light passing through the lens may be 170% to 210%. [Effects of the Invention]

[0018] In the lighting device according to the embodiment, a lens disposed on the phosphor layer transmits red light and blue light. By reflecting the light, the visibility of the lighting module can be improved.

[0019] The lighting device according to the embodiment reduces the phosphor content by a lens disposed on the phosphor layer. This makes it possible to provide a uniform surface light source while preventing light loss due to the phosphor layer. can. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a cross-sectional view of a lighting device according to an embodiment. [Figure 2] FIG. 2 is a plan view of the light emitting module according to the embodiment. [Figure 3] FIG. 3 is a diagram showing the amount of light depending on the phosphor content of the lighting device according to the example. [Figure 4] FIG. 4 is a diagram showing the transmittance of the outer lens of the lighting device according to the embodiment according to the wavelength. [Figure 5] FIG. 5 is a plan view of a lighting device according to a comparative example and a diagram showing intensity according to wavelength. [Figure 6] FIG. 6 is a plan view of a lighting device according to a comparative example and a diagram showing intensity according to wavelength. [Figure 7] FIG. 7 is a plan view of an illumination device according to an embodiment and a diagram showing intensity according to wavelength. [Figure 8] FIG. 8 is a plan view of a lighting device according to an embodiment and a diagram showing intensity according to wavelength. [Figure 9] FIG. 9 is a graph showing irradiance as a function of wavelength for the example and comparative examples. [Figure 10] FIG. 10 is a cross-sectional view of a modified example of the lighting device according to the embodiment. [Figure 11] FIG. 11 is a cross-sectional view of a modified example of the lighting device according to the embodiment. [Figure 12] FIG. 12 is a cross-sectional view of a modified example of the lighting device according to the embodiment. [Figure 13] FIG. 13 is a cross-sectional view of a modified example of the lighting device according to the embodiment. [Figure 14] FIG. 14 is a diagram showing a comparison between a modified example of the illumination device according to the example and an illumination device according to the comparative example. [Figure 15]FIG. 15 is a plan view of a vehicle to which a lamp having an illumination module according to an embodiment is applied. [Figure 16] FIG. 16 is a diagram showing a lamp having a lighting module or lighting device according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0021] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0022] However, the technical idea of ​​the present invention is not limited to the described embodiments, and various The present invention can be embodied in various forms, and the components between the embodiments can be combined within the scope of the technical concept of the present invention. can be selectively combined or substituted. Unless expressly and specifically stated otherwise, all terms (including technical and scientific terms) to which the present invention pertains are intended. The meaning of the term "commonly understood by a person of ordinary skill in the art" is interpreted as meaning that is not defined in a dictionary. Commonly used terms such as those mentioned above should be interpreted in light of the contextual meaning of the technology involved. In addition, the terms used in the embodiments of the present invention are intended to be used to describe the embodiments. It is intended to be illustrative and not limiting of the present invention.

[0023] In this specification, the singular form can also include the plural form unless otherwise specified, and When it says "A and at least one of B and C (or more than one)," it means A, B and C. It is possible to include one or more of all possible combinations. In describing the components of the embodiment, terms such as first, second, A, B, (a), (b), etc. may be used. Such terms are used to distinguish the component from other components. The terms do not limit the nature or order of the components. When an element is described as being "coupled," "coupled," or "connected" to another element, The component may be directly connected or connected to other components, or may be connected to each other. Furthermore, this includes all cases where other components are "coupled," "coupled," or "connected."

[0024] In addition, when it is described as being formed or arranged "above or below" each component, it is also "At or below" does not only mean when two components are in direct contact, but also when one or more further components are in contact. This also includes cases where a component is formed or placed between two components. When expressed, it means not only the upward direction but also the downward direction based on one component. It can include.

[0025] The lighting device according to the present invention can be used in a variety of lamp devices that require illumination, such as vehicle lamps, It can be applied to home lighting devices or industrial lighting devices, for example, vehicle lamps. If so, headlights, width lights, side mirror lights, fog lights, tail lights, and control lights are Moving lights, daytime running lights, vehicle interior lighting, door scuffs, rear combination lamps, back The lighting device of the present invention can be applied to indoor and outdoor advertising devices, display devices, etc. It can also be applied to various electric vehicles and other fields, and there are other products currently being developed and commercialized. All lighting-related fields and advertising-related fields that can be realized with future technological developments It can be said that this can be applied to the following:

[0026] FIG. 1 is a cross-sectional view showing an illumination device according to an embodiment, and FIG. 2 is a cross-sectional view showing a light-emitting module according to an embodiment. FIG. 1 is a cross-sectional view of a module.

[0027] As shown in FIGS. 1 and 2, the lighting device 100 includes a housing 10. 10 and may include a lighting module 60 and an outer lens 70. The lighting module 60 includes a substrate 20, a plurality of light-emitting elements 30 disposed on the substrate 20, a connector 24 for supplying power to the light-emitting element 30; and a resin layer 40 for covering the light-emitting element 30. The outer layer 40 may include a phosphor layer 50 disposed on the resin layer 40. A lens 70 is disposed on top of the phosphor layer 50 .

[0028] The housing 10 is disposed to surround the side of the lighting module 60. It is coupled to the light module 60 .

[0029] The lighting module 60 emits the light emitted from the light emitting element 30 as a surface light source. A plurality of the light emitting elements 30 are disposed on the substrate 20. In the device 100, the plurality of light emitting elements 30 are arranged in N columns (N is an integer of 1 or more) and / or M rows (M The plurality of light emitting elements 30 are arranged in N rows and M rows, as shown in FIG. They are arranged in rows (N and M are integers greater than or equal to 2).

[0030] As shown in FIGS. 1 and 2, the substrate 20 is provided with a plurality of light emitting elements 30 and a resin layer 40 therebelow. The substrate 20 can function as a base member or a support member positioned on the substrate. For example, the substrate 20 may include a printed circuit board (PCB). , resin-based printed circuit boards (PCB), metal core PCB, flexible PC B, the substrate may include at least one of a ceramic PCB or an FR-4 substrate.

[0031] The upper surface of the substrate 20 has an X-axis-Y-axis plane, and the thickness d1 of the substrate 20 is and the height in the Z direction perpendicular to the Y direction. Here, the X direction is the first direction, The Y direction is a second direction perpendicular to the X direction, and the Z direction is perpendicular to the X and Y directions. It may be a third direction.

[0032] The substrate 20 includes a wiring layer (not shown) on the top thereof, and the wiring layer is connected to the light emitting element 30. The substrate 20 is electrically connected to the reflective member or protective layer disposed thereon. The wiring layer of the substrate 20 can be protected. The plurality of light emitting devices 30 are connected in series, parallel, or series-parallel. The groups are connected in series or parallel, or the groups are connected in series or parallel. will be done.

[0033] The length X1 of the substrate 20 in the first direction (X direction) and the length Y1 of the substrate 20 in the second direction (Y direction) are For example, the length X1 in the first direction may be longer than the length Y1 in the second direction. The length X1 in the first direction may be set to be at least twice the length X1 in the second direction. The thickness d1 of the substrate 20 is 1.0 mm or less, for example, 0.3 mm to 1.0 mm. Since the thickness d1 of the substrate 20 is thin, the lighting module The thickness d1 of the substrate 20 is 1.0 mm or less. The thickness d of the substrate 20 is d. 1 is equal to or less than 0.1 times the distance from the bottom surface of the substrate 20 to the top surface of the top layer, or The thickness of the substrate 20 from the bottom surface of the substrate 20 to the top surface of the uppermost layer may be in the range of 0.06 to 0.06. The spacing at may be the thickness d1 of the substrate 20.

[0034] The distance from the lower surface of the substrate 20 to the upper surface of the phosphor layer 50, which is the uppermost layer, is The thickness e1 of the lighting module 60 may be the thickness e1 of the substrate 2. 1 / 3 or more of the shorter of the lengths x1 and y1 in the first direction (X direction) and the second direction (Y direction) of 0 The thickness e1 of the lighting module 60 may be, but is not limited to, The thickness of the substrate 20 may be 6 mm or less at the bottom, or may range from 4 mm to 6 mm. The thickness e1 of the lighting module 60 is 200% or less of the thickness b1 of the resin layer 40. For example, the thickness of the lighting module 60 can be in the range of 120% to 200%. The thickness e1 is available in 4mm to 6mm, making it a flexible and slim surface light source module. can be provided.

[0035] If the thickness e1 of the lighting module 60 is thinner than the above range, the light diffusion space is reduced. If the thickness of the lighting module is increased, the light spot will be generated. The installation constraints and the degree of freedom in design are reduced. It is provided as a module that can be curved, allowing for freedom of design. The thickness of the lighting module 60 can be reduced. The ratio of the length Y1 of the module 60 in the Y direction may be 1:m, where m≧1. The m is a natural number equal to or greater than 1, and the row of the light-emitting elements 30 can have the following: For example, m may be an integer smaller than the thickness e1 of the lighting module 60. If it is four times larger, the light emitting elements 30 are arranged in four rows.

[0036] The substrate 20 includes a connector 24 at a portion thereof, and supplies power to the plurality of light-emitting elements 30. The area 23 in which the connector 24 is arranged on the substrate 20 can be The region 23 where the resin layer 40 is not formed has a length Y1 of the substrate 20 in the Y direction or The connector 24 is disposed on a part of the upper surface or a part of the lower surface of the substrate 20. If the connector 24 is placed on the bottom surface of the substrate 20, the area 23 is removed. The substrate 20 may have a rectangular or square shape in top view. However, it may have other polygonal shapes, or may have a bar shape with a curved surface. The connector 24 is a terminal connected to the light emitting device 30 or a female connector. It may be a male or female connector.

[0037] The substrate 20 may include a protective layer or a reflective layer thereon. The protective layer may include a member having a solder resist material, and the solder resist material As a white material, it can reflect incident light.

[0038] As another example, the substrate 20 may include a transparent material. Since the plate 20 is provided, the light emitted from the light emitting device 30 is directed toward the upper surface of the substrate 20. At this time, the light emitted in the direction of the bottom surface of the substrate 20 is The light is reflected by the inner surface of the housing 10 and guided to the outer lens 70 side.

[0039] The light emitting element 30 is disposed on the substrate 20. The light emitting element 30 has a light emitting surface The light emitting surface S1 faces the upper surface of the phosphor layer 50, and the light emitting surface S2 faces the upper surface of the phosphor layer 50. The light is emitted in the direction of the phosphor layer 50. The light emitting surface S1 is the upper surface of the light emitting element 30. The plurality of side surfaces S2 includes at least four side surfaces, and the plurality of side surfaces S2 are arranged to form a light-emitting element. The light emitting element 30 emits light in the lateral direction of the element 30. The ED chip is disposed on the substrate 20 in a flip-chip configuration. 30 may be formed with a thickness of 0.3 mm or less.

[0040] The light emitting device 30 may be implemented as a horizontal chip or a vertical chip. In the case of the horizontal or vertical chip, the wires can be used to connect to other chips or wiring. When a wire is connected to the LED chip, The thickness of the diffusion layer increases with the height of the wire, and the diffusion layer is generated by the connection space due to the length of the wire. The distance between the optical elements 30 increases. The light emitting element 30 according to the embodiment emits light from five sides. The light emitting element 30 is flip-chip mounted on the substrate 20. The distance a1 between the light emitting elements 30 may be determined by the thickness b1 of the resin layer 40 (b1≦ a1) may be equal to or larger than the distance a1. The distance a1 may be in the range of 4 mm to 7 mm. For example, it is in the range of 6.5mm to 8mm, and can be changed depending on the size of the LED chip. The minimum distance between the light emitting elements 30 is equal to or greater than the thickness b1 of the resin layer 40. It's okay.

[0041] The light emitting device 30 disclosed in the embodiment is provided as a flip chip that emits light from at least five sides. Therefore, the luminance distribution and the directivity angle distribution of the light emitting element 30 are improved.

[0042] When the light emitting elements 30 are arranged in an N×M matrix on the substrate 20, N is one row or is two or more columns, and M can have one or more rows. The light emitting elements 30 are arranged in the Y-axis and X-axis directions.

[0043] The light emitting element 30 is a light emitting diode (LED) chip that emits blue, red, green, ultraviolet ( The light emitting element 30 can emit at least one of UV (ultraviolet) and infrared light. For example, the light emitting element 3 can emit at least one of blue, red, and green light. 0 is electrically connected to the substrate 20, but is not limited thereto.

[0044] The plurality of light emitting elements 30 arranged on the substrate 20 are sealed by a resin layer 40. The plurality of light emitting elements 30 may be in contact with the resin layer 40. The resin layer 40 is disposed on the side and top surfaces of the light emitting element 30. The light emitted from the light emitting element 30 is emitted through the resin layer 40. The light is emitted to the outside through the resin layer 40 and the phosphor layer 50 disposed on the resin layer 40. The thickness b1 of the resin layer 40 is smaller than the thickness e1 of the lighting module 60, or The thickness d1 of the plate 20 and the thickness c1 of the phosphor layer 50 may be thicker than the thickness d1 of the resin layer 50. The thickness b1 of 40 can be 3 mm to 5 mm.

[0045] The resin layer 40 is made of a transparent resin material, for example, UV (Ultra Violet) resin, silicone, etc. The resin layer 40 may be made of a resin material such as polycarbonate or epoxy. The UV resin may be a diffusion layer or a molding layer. It is possible to use resin (oligomer type) whose main raw material is acrylate oligomer. For example, urethane acrylate oligomer, which is a synthetic oligomer, can be used. The main material is IBOA (isobornyl acrylate), a low-boiling point dilutable reactive monomer. (Isobornyl acrylate), HBA (Hydroxybutyl Acrylate) Acrylate), HEMA (Hydroxy Metaethyl Acrylate) The monomer may further contain a mixed monomer such as a photoinitiator (e.g., a photoinitiator) as an additive. , 1-hydroxycyclohexyl phenyl-ketone, Diphenyl(1-hydroxycyclohexylphenyl) Diphenyl(2,4,6-trimethylbenzoyl phosphine oxide( Diphenyl (2,4,6-trimethylbenzoylphosphine oxide) etc. or antioxidant The UV resin may contain 10 to 21% of oligomer and 3% of monomer. The composition may contain 0 to 63% of the above-mentioned components and 1.5 to 6% of additives. The resin layer formed using the composition is formed by using a resin such as a UV resin instead of a light guide plate. By using the above-mentioned composition, it is possible to adjust the refractive index and thickness, and the adhesive properties and It is possible to satisfy both reliability and mass production speed.

[0046] A phosphor layer 50 is disposed on the resin layer 40. The phosphor layer 50 is The phosphor layer 50 disposed on the resin layer 40 is The phosphor layer 50 extends to the side of the resin layer 40. The phosphor layer 50 extending to the side of the resin layer 40 may be surrounded by the substrate. The phosphor layer 50 may be in contact with the upper surface of the substrate 20. The phosphor layer 50 may have a thickness c1 of 0.5 mm to 1 mm. The phosphor content of the phosphor layer 50 can be determined by the ratio of the phosphor content to the weight of the phosphor layer 50. The phosphor content of the phosphor layer 50 may be determined by the weight of the phosphor layer 50. For example, the phosphor content of the phosphor layer 50 may be 2% to 10%. If the weight of the light body layer 50 is less than 2%, the lighting module 60 may suffer from hot spots. The amount of wavelength-converted light decreases as the phosphor content of the phosphor layer 50 increases. When the weight ratio of the phosphor layer 50 is 10% or more, the light absorbed or reflected by the phosphor layer 50 is As a result, the light extraction efficiency of the lighting module 60 decreases. The first light L1 is diffused by the resin layer 40 and then incident on the phosphor contained in the phosphor layer 50. Therefore, the first light L1 emitted from the light emitting element 30 is converted into the second light L2. can be diffused by the resin layer 40 and pass through the phosphor layer 50. The light L1 emitted from the light emitting element 30 is converted (L2) by the phosphor layer 50. Alternatively, the light may pass through the phosphor layer 50 (L1) and face the outer lens 70. The phosphor layer 50 has a low content of 2% to 10% by weight of the phosphor layer 50, The light reflected or absorbed by the phosphor layer 50 is reduced. The amount of light passing through or converted by the phosphor layer 50 is increased, The light extraction efficiency of the module 60 can be improved. By having such a content, the light reflected or absorbed by the phosphor layer 50 is reduced, and The amount of light passing through the phosphor layer 50 increases, and the distance a1 between the adjacent light emitting elements 30 decreases. The thickness of the light emitting element disposed on the substrate 20 can be improved to 4 mm to 6 mm or 7 mm to 8 mm. You can reduce the number by 30.

[0047] The phosphor layer 50 may include a transparent material. The phosphor layer 50 may be made of a silicone material. Silicone materials may also be used, which have different chemical bonds. For example, silicone may be used It is a polymer that combines silicon, an organic substance, and carbon, an organic substance, and has the thermal stability and chemical stability of inorganic substances. Chemical stability, abrasion resistance, gloss, etc., and the properties of organic materials such as reactivity, solubility, elasticity, and processability Silicone has the following physical properties: general silicone, fluorine silicone with a high fluorine content, Increasing the fluorine content of fluorine silicone can improve moisture resistance. This has the effect of

[0048] The phosphor layer 50 receives the light emitted from the light emitting element 30 and converts the wavelength of the light. For example, the phosphor layer 50 may include a wavelength conversion means for providing light. , quantum dots, etc. Phosphors or quantum dots can emit blue, green, or red light.

[0049] The phosphor is uniformly distributed within the phosphor layer 50. The phosphor is a fluoride. It may contain a compound phosphor, such as an MGF-based phosphor, a KSF-based phosphor, or a KTF-based phosphor. It can include at least one of the following:

[0050] When the phosphor is a red phosphor, the red phosphor has a wavelength of 610 nm to 650 nm. The wavelength may have a range of wavelengths between 1000 and 10000 nm, and the wavelength may have a width of less than 10 nm. The red phosphor may include a fluoride-based phosphor.

[0051] An outer lens 70 is disposed on the phosphor layer 50. The outer lens 70 , and is coupled to the housing 10. The outer lens 70 is attached to the side of the housing 10. 0 may be arranged to couple the outer lens 70 and the housing 10. The outer lens 70 is spaced apart from the upper surface of the phosphor layer 50 with a predetermined gap G therebetween. The outer lens 70 is disposed in such a manner that the light emitted from the lighting module 60 is reflected from the front. It can irradiate in a concentrated manner in a direction, or conversely, irradiate in a dispersed manner. The outer lens 70 may be a red lens. It can be made of polymethylmethacrylate (PC) or PC (Polycarbonate) material. In the lighting device 100 according to the present invention, the light beams emitted from the lighting modules 60 have different refractive indices. The phosphor layer 50 and the outer lens 70 are By passing through the gap G between the two electrodes, the light extraction efficiency can be improved. In addition, the first light L1 emitted from the light emitting element 30 and passing through the phosphor layer 50 is The outer lens 70 absorbs or reflects the light emitted from the light emitting element 30. The second light L2 converted by the phosphor layer 50 passes through the outer lens 70. Therefore, it is possible to prevent a peak that may occur due to the first light L1. The hot spot phenomenon caused by the phosphor layer 50 having a low density is prevented by the above. This can be prevented by the target lens 70.

[0052] In conventional vehicle lighting modules, when a low-density phosphor layer is placed on a light-emitting element, There is a problem that it is difficult to form a uniform surface light source, and in order to solve this problem, a high density However, when a high density phosphor layer is placed on the light emitting element, The light emitted from the light emitting element is reflected or absorbed by the high density phosphor layer, In the example, a new problem occurred in which the light extraction efficiency of the fluorescent material layer 50 was reduced. A uniform surface light source can be formed even when placed on a light emitting element, and a low density phosphor layer 50 is placed It prevents the light extraction efficiency from decreasing in the case of a uniform surface light source while maintaining the light extraction efficiency. An improved lighting device 100 can be provided.

[0053] In the lighting device 100 according to the embodiment, the phosphor content of the phosphor layer 50 is The low content of 2% to 10% by weight of the lighting module 60 The efficiency can be improved by the outer lens 70 disposed on the phosphor layer 50. Therefore, the hot spot phenomenon can be prevented and a uniform surface light source can be formed. In the lighting device 100 according to the embodiment, the light emitted from the light emitting element 30 has different refractive indexes. and an outer lens 70 having the phosphor layer 50 and the outer lens The light passes through the gap G between the lenses 70 and is emitted to the outside, thereby increasing the light extraction efficiency of the lighting device 100. The rate can be improved.

[0054] FIG. 3 shows the luminous efficiency depending on the phosphor content of the lighting devices according to the example and the comparative example (ref). 3, the light emitted from the lighting devices of the comparative example and the example is The light efficiency is known. [Table 1]

[0055] Here, the light efficiency of the module is determined by the ratio of the amount of light emitted from the light emitting element to the amount of light passing through the resin layer 40 and the phosphor layer. The luminous efficiency of the lens is measured when the light emitted from the light-emitting element of the lighting device is transmitted through a lens. The light measured when the incident light passes through the resin layer 40, the phosphor layer 50, and the outer lens 70. The comparative example (ref) shows that the light emitted from the light emitting element of the lighting device is The light efficiency is measured when light passes through the phosphor layer and ink layer containing the phosphor.

[0056] In Table 1, when the phosphor content of Ref is 20% by weight of the phosphor layer 50, In comparison, in the comparative example of Ref, the light emitted from the light emitting element passes through the resin layer, the phosphor layer, The light efficiency measured through the ink layer was 32 lm / W, and in the example after passing through the lens, The light efficiency measured through the resin layer, phosphor layer, ink layer, and outer lens was 29 lm / In the light-emitting device of the embodiment, the phosphor content is 20 W relative to the weight of the phosphor layer 50. %, the light emitted from the light emitting element is measured after passing through the resin layer 40 and the phosphor layer 50. The light efficiency was 72 lm / W, measured after passing through the phosphor layer 50 and then through the outer lens 70. The light efficiency is 42 lm / W, so the light emitted from the light emitting element of the lighting device is It can be seen that the light extraction efficiency is significantly reduced when passing through the layer. In the light emitting device, light emitted from the light emitting element passes through the resin layer 40, the phosphor layer 50, and the outer lens 7. Since only 0 is transmitted, it can be seen that the light extraction efficiency is improved compared to when an ink layer is present. do.

[0057] In the embodiment, the phosphor content of the phosphor layer 50 is 2% by weight. If the ratio is more than 10%, the amount of light emitted from the light-emitting element and measured externally will gradually increase. Next, it can be seen that the phosphor content of the comparative example and the example is 1% by weight of the phosphor layer 50. If the luminous efficiency is 0% or more, the luminous efficiency measured externally after being emitted from the light emitting element decreases. Therefore, in the lighting device according to the embodiment, the phosphor content of the phosphor layer 50 is When the weight ratio of the phosphor layer 50 is 2% or more and 10% or less, the phosphor layer 50 can reflect or absorb the phosphor. The amount of light collected is reduced, and the light loss due to the phosphor layer 50 can be reduced. The phosphor content of layer 50 may range from 6% to 10%.

[0058] In addition, when the phosphor content is 2% or more and 10% or less by weight of the phosphor layer 50, When comparing the comparative example and the example, it is found that the light emitted from the light emitting element of the lighting device is reflected by the resin layer 4. The light efficiency measured when light was transmitted through the resin layer 40 and the phosphor layer 50 was , 170% to 210% higher than the light efficiency measured when transmitted through the outer lens 70 can have:

[0059] FIG. 4 is a graph showing the transmittance of the outer lens according to wavelength. As shown, the outer lens 70 has a transmittance of 5.5 in the blue wavelength region, for example, 420-480 nm. %, so most blue light is blocked and red wavelengths, e.g., 590-750 nm, are blocked. Since the transmittance gradually increases in the As a result, the low-density phosphor layer 50 of the lighting device 100 according to the embodiment allows light to be emitted from the light-emitting element 30. A peak may occur in the wavelength region (blue) of the first light L1 emitted from the outer The lens 70 reflects the first light L1 passing through the phosphor layer 50 and heading toward the outer lens 70. The low-density This prevents the blue peak caused by the phosphor layer 50 and improves light extraction efficiency. It is possible.

[0060] 5 and 6 show comparative examples of illumination without a low-density phosphor layer and an outer lens. 7 and 8 are diagrams showing the plan view of the illumination device and the intensity according to the wavelength. 1 is a plan view of an illumination device according to an embodiment having a low-density phosphor layer and an outer lens, and a wavelength 5, 6, 7 and 8 are graphs showing the intensity as a function of wavelength. 5, in the lighting device according to the comparative example, the low-density phosphor The hot spot phenomenon occurred because of the use of the layer, but as shown in FIG. In this lighting device, hot spots do not occur even when a low density phosphor layer is used. It can be seen that visibility is improved compared to the lighting device according to the comparative example.

[0061] Furthermore, as shown in FIG. 6, in the lighting device according to the comparative example, the light in the blue wavelength region Although there is some intensity, as shown in FIG. 8, the illumination device according to the embodiment It can be seen that the light intensity in the blue wavelength region is reduced compared to the comparative example.

[0062] FIG. 9 shows the irradiance (Irr) depending on the wavelength of the lighting devices according to Comparative Example 2 (dotted line) and Example (solid line). 9 is a diagram showing irradiance according to wavelength shown in FIG. The results of the comparative example will be explained with reference to Table 2. [Table 2]

[0063] Referring to Table 2, in the blue wavelength region, for example, in the region around 450 nm, an outer lens is used. The irradiance of the lighting device according to Comparative Example 2, which does not include the outer lens 70, is It can be seen that the irradiance of the lighting device according to the embodiment is reduced by 44.1%. In the bright device, the outer lens 70 reduces the illuminance in the blue wavelength region by 44.1%. It is possible to prevent the occurrence of peaks in the wavelength region.

[0064] In the red wavelength range, for example, 590nm to 750nm, the outer lens is included. The irradiance of the illumination device of the example including the outer lens 70 is higher than that of the illumination device of the comparative example 2, which does not include the outer lens 70. It can be seen that the irradiance of the light device is reduced by 6.0% and 2.1%, respectively. The lighting device including the outer lens 70 absorbs blue light and emits blue wavelengths. It prevents peaks from occurring in the long range, and allows red light to pass through without being absorbed, This can prevent the reduction in red light extraction efficiency due to the lens.

[0065] Next, Fig. 10 is a diagram showing a modified example of the lighting device according to the embodiment. The details described in the illumination devices according to the embodiments shown in FIGS. 1 to 9 can be adopted.

[0066] The lighting device 100 includes a lighting module 60 and an outer casing 10. The outer lens 70 may cover the entire upper surface of the phosphor layer 50. The lower surface of the outer lens 70 can cover the upper surface of the phosphor layer 50. can come into contact with the surface.

[0067] In the lighting device 100 according to the embodiment shown in FIG. 10, The outer lens 70 may be included. 0 and the phosphor layer 50 are bonded to the housing 10 without forming a gap. The size of the lighting device 100 can be reduced, and the degree of freedom in design can be increased.

[0068] Next, Fig. 11 is a diagram showing a modified example of the lighting device according to the embodiment. The details described in the illumination devices according to the embodiments shown in FIGS. 1 to 9 can be adopted.

[0069] The lighting device 100 includes a housing 10, a lighting module 60, an inner lens, and a The inner lens 70 may include an outer lens 80. The outer lens 80 may be in contact with the upper surface of the phosphor layer 50. The inner lens 70 is disposed on the outer lens 80. The inner lenses 70 are spaced apart from each other with a regular gap G therebetween. The outer lens 80 may be made of a transparent material.

[0070] In the lighting device 100 according to the embodiment shown in FIG. 11, the light emitted from the lighting module 60 The light passing through the inner lens 70 is guided to the inner lens 70 with a predetermined gap therebetween. The outer lens 80 to be arranged, the inner lens 70 and the outer lens 80 The light is emitted to the outside through the gap G between the light sources. The inner lens 70 and the outer lens 71 have different refractive indices. The lens 80 passes through the gap G between the inner lens 70 and the outer lens 80. By this, the light extraction efficiency of the lighting device 100 can be improved.

[0071] Next, Fig. 12 is a diagram showing a modified example of the lighting device according to the embodiment. The details described in the illumination devices according to the embodiments shown in FIGS. 1 to 9 can be adopted.

[0072] The lighting device 100 includes a housing 10, a lighting module 60, an inner lens, and a The inner lens 70 may include an outer lens 80. The inner lens 70 can cover the entire upper surface of the phosphor layer 50. The outer lens 80 can be in contact with the upper surface of the optical body layer 50. The outer lens 80 is disposed on the upper surface of the inner lens 70. The lower surface of the outer lens 80 is covered by the inner lens 82. The inner lens 70 can be in contact with the upper surface of the inner lens 70. The outer lens 80 may be made of a transparent material.

[0073] The lighting device 100 according to the embodiment shown in FIG. 12 includes an inner lens 70 and the inner The illumination device may include an outer lens 80 that contacts the upper surface of the inner lens 70. Light emitted from the light module 60 passes through the outer lens 80 and the inner lens 70. As a result, the inner lens 70 and the outer lens 8 10 is coupled to the housing 10 without forming a gap, The lighting module 60 can reduce the size and increase the degree of freedom in design. The incident light passes through the inner lens 70 and the outer lens 80, which have different refractive indices. By emitting the light to the outside, the light extraction efficiency of the lighting device 100 can be improved.

[0074] FIG. 13 is a diagram showing a modified example of the lighting device according to the embodiment. In FIG. 13, the lighting device shown in FIGS. The details described in the lighting device according to the embodiment shown in FIG. 9 can be adopted.

[0075] As shown in FIG. 13, the modified example of the lighting device according to the embodiment includes a housing 10, a substrate 2, and a a lighting module 60 including the light-emitting element 30, the resin layer 40, the diffusion layer 55, and the phosphor layer 50; A lens 70 may be included.

[0076] 13, a diffusion layer 55 is disposed on the resin layer 40. The diffusion layer 55 The diffusion layer 55 is disposed so as to surround the side and top surfaces of the resin layer 40. The diffusion layer 55 is disposed on the resin layer 40. The diffusion layer 55 is adhered onto the resin layer 40 by applying a predetermined pressure or pressure / heat. The diffusion layer 55 can be adhered by the adhesive strength of the resin layer 40 itself without any additional adhesive. This reduces the process of applying adhesive separately and eliminates the use of adhesives that are harmful to the human body. Since it is not necessary to use it, it reduces waste in processes and materials.

[0077] The diffusion layer 55 is adhered to the entire upper surface of the resin layer 40. The diffusion layer 55 diffuses light. When the light intensity is high, certain colors may not mix, so try to diffuse the light and mix it. The material of the diffusion layer 55 may be a light-transmitting material. For example, The diffusion layer 55 is made of a polyester (PET) film, a PMMA (Poly Methyl Methacrylate) film, or the like. e (Polymethyl methacrylate) material and PC (Poly Carbonate) The diffusion layer 55 may include at least one of silicone or epoxy. The diffusion layer 55 may be a single layer or a multi-layer. may include:

[0078] The phosphor layer 50 is arranged in a pattern shape and adhered to the lower surface of the diffusion layer 55. The pattern shape of the phosphor layer 50 may be a triangle, a square, or a circle. The phosphor layer 50 corresponds to the light emitting element 30, but is not limited thereto. The phosphor layer 50 is disposed so as to overlap the light emitting element 30 in the vertical direction. The color of the phosphor contained in the phosphor layer 50 may be the same as the color of the lens 70. However, the present invention is not limited to this. For example, the color of the phosphor contained in the phosphor layer 50 may be When the color of the lens 70 is the same, a part of the light emitted from the light emitting element 30 The remaining light passes through the phosphor layer 50 and the lens 70 and exits the lighting device. The light can be incident on the lens 70 without passing through the phosphor layer 50 and can pass through the lens 70. As a result, the light emitted from the light emitting element 30 may not be able to be emitted to the outside. The phosphor layer 50 separates the light into light that is emitted to the outside and light that is not emitted to the outside. The image of the lighting device can be realized according to the pattern shape of the phosphor layer 50.

[0079] The thickness of the phosphor layer 50 is 5 μm or more, and may be thinner than the thickness of the diffusion layer 55. The thickness of the phosphor layer 50 may be the same as that of the diffusion layer 55, but is not limited thereto. If the thickness is greater than 5 μm or less, the lighting device may emit light to the outside when turned on. In this case, the pattern shape of the phosphor layer 50 may not be recognized. When the lighting device is not turned on, the diffusion layer 55 is exposed to the outside. This allows for early recognition and improves the appearance of the lighting device.

[0080] As described above, in the modified example of the lighting device according to the embodiment, the hot spot phenomenon occurs. This prevents the phosphor layer 50 from being discolored, thereby enabling the image of the pattern shape to be realized.

[0081] FIG. 14 is a diagram showing a comparison between the illumination devices according to the example and the comparative example. As shown in FIG. 13, a pattern of a phosphor layer 50 is disposed on the light emitting element 30. , and a comparative example. In the LED, no phosphor layer is placed on top of the light-emitting element, and a red lens is placed on top of the light-emitting element. This relates to lighting devices that do not have a built-in LED.

[0082] When comparing the comparative example and the embodiment with reference to FIG. 14, when the lighting devices of the comparative example and the embodiment are turned on, If not, in the embodiment, a red lens is disposed externally so that the lighting device lights up in red when not lit. Therefore, the appearance can be improved compared to the comparative example.

[0083] When the illumination devices of the comparative example and the embodiment are turned on, in the comparative example, In the embodiment, the light emitting element 30 is projected as it is, but in the embodiment, the light emitting element 30 is The phosphor layer 50 placed on the surface projects an image of the light emitting element 30 disposed inside the lighting device. Since the lighting device according to the embodiment does not have to be tampered with, the appearance can be improved. Since an image corresponding to the pattern of the phosphor layer 50 can be recognized externally, the phosphor layer 50 The image of the lighting device can be realized according to the shape of the pattern, so various image objects can be realized. It is possible to provide a lighting device that can realize this.

[0084] FIG. 15 is a plan view of a vehicle to which a vehicle lamp to which a lighting device according to an embodiment is applied is applied. FIG. 16 shows a vehicle lamp having the lighting module or lighting device disclosed in the embodiment. 1 is a diagram showing a pump.

[0085] Referring to FIG. 15 and FIG. 16, in the vehicle 900, the tail light (800) is a first lamp unit. unit 812, second lamp unit 814, third lamp unit 816, and housing 810. Here, the first lamp unit 812 functions as a turn signal light. The second lamp unit 814 may be a light source for serving as a sidelight. The third lamp unit 816 may be a light source for serving as a brake light. However, the present invention is not limited to this. At least one or all of the knits 812, 814, 816 may be fabricated using the fabrication methods disclosed in the embodiments. The housing 810 may include a first lamp unit to a second lamp unit. It houses three lamp units 812, 814, and 816 and can be made of a light-transmitting material. At this time, the housing 810 may have a bend depending on the design of the vehicle body. The first to third lamp units 812, 814, and 816 are arranged in a housing 810. A surface light source that can have a curved surface depending on the shape can be realized. The lamp unit is applied to a tail light, a brake light, or a turn signal lamp of a vehicle. If so, it can be applied to the turn signal lamps of the vehicle.

[0086] The features, structures, effects, etc. described in the above embodiments may be used in at least one embodiment of the present invention. The present invention is not limited to any one embodiment. The features, structures, effects, etc. of the present invention may be easily understood by a person having ordinary skill in the art to which the present invention pertains. The examples can be combined or modified in various ways. The contents of the present invention should be construed as being included in the scope of the present invention.

[0087] Although the above description has focused on the examples, these are merely examples and do not limit the present invention. It is understood that those skilled in the art will be able to understand the essence of the present invention. Various modifications and applications not exemplified above are possible within the scope of the basic characteristics. For example, each component specifically presented in the embodiments can be modified and implemented. The differences relating to such modifications and applications are the subject of the present invention as defined in the appended claims. should be interpreted as being within the scope of

Claims

1. an illumination module emitting first and second lights different from each other; an inner lens disposed on the lighting module; The inner lens has a light transmittance for a long wavelength of the first light and the second light that is higher than a light transmittance for a short wavelength of the first light and the second light, The transmittance of the first light through the inner lens is within 5%, the inner lens has a color having a wavelength longer than the wavelength of the color of the first light; The lighting device including the lighting module and the inner lens emits the second light through the entire upper surface; The lighting module emits a mixed surface light source of the first light and the second light, the lighting module includes a plurality of light emitting elements and a plurality of layers of a resin material sequentially stacked on the plurality of light emitting elements; a thickness of a layer of the plurality of layers adjacent to or in contact with the light-emitting element is greater than a thickness of a layer disposed on a surface of the lighting module; The inner lens has transmittance for the first light over the entire upper surface of the lighting module and a color with a wavelength longer than the wavelength of the color of the first light.

2. A lighting module that emits first and second lights that are different from each other; an inner lens disposed on the lighting module; The inner lens has a light transmittance for a long wavelength of the first light and the second light that is higher than a light transmittance for a short wavelength of the first light and the second light, The transmittance of the first light through the inner lens is within 5%, the inner lens has a color having a wavelength longer than the wavelength of the color of the first light; The lighting device including the lighting module and the inner lens emits the second light through the entire upper surface; The lighting module emits a mixed surface light source of the first light and the second light, the lighting module includes a plurality of light emitting elements and a plurality of layers of a resin material sequentially stacked on the plurality of light emitting elements; the thicknesses of the layers are different from one another; the surface of the lighting module and the inner lens have the same color; the second light has a wavelength longer than the wavelength of blue light; the inner lens has a transmittance of the first light and a color having a wavelength longer than the wavelength of the color of the first light on the entire upper surface of the lighting module; The second light has a wavelength longer than that of blue light.

3. The first light is blue, the lighting module emits a surface light source having light of two or less colors through the entire upper surface of the lighting module; the second light is red; The lighting device according to claim 1 , wherein the first light has a wavelength shorter than that of red light.

4. the first light is blue; The lighting device according to claim 1 , wherein the second light is red.

5. 5. The lighting device according to claim 1, wherein the inner lens is a red lens that transmits light with wavelengths of 590 nm to 750 nm.

6. The lighting device according to claim 1 , wherein the luminous intensity of the second light emitted through the inner lens is greater than the luminous intensity of the first light emitted through the inner lens.

7. The lighting module comprises: A substrate; the plurality of light-emitting elements disposed on the substrate and emitting the first light; a resin layer covering the plurality of light-emitting elements and disposed on the substrate; The lighting device according to claim 1 , further comprising: a reflecting member disposed between the substrate and the resin layer.

8. the lighting module includes a phosphor layer disposed between the resin layer and the inner lens, the phosphor layer converting a portion of the first light into the second light; the plurality of layers of resin material are the resin layer and the phosphor layer, all light emitting elements in the lighting module emit the first light; The lighting device according to claim 7 , wherein the phosphor layer converts a part of the first light incident through the entire surface of the resin layer into a second light.

9. a housing disposed on the lower surface of the substrate and outside the phosphor layer; The top of the housing is open, the inner lens is coupled to an upper portion of the housing; The lighting device according to claim 8 , wherein the inner lens is spaced apart from the resin layer.

10. a housing disposed on a lower surface and an outer surface of the lighting module; The housing is open at the top, the inner lens is coupled to an upper portion of the housing; the inner lens is spaced apart from the top surface of the lighting module and overlaps the plurality of layers in a vertical direction; The lighting device according to claim 1 , wherein the vertical direction is a direction from the lighting module to the inner lens.

11. 11. The lighting device according to claim 9, wherein a bottom surface and a side surface of the lighting module are in contact with the housing.

12. an outer lens made of a transparent material disposed on the inner lens; the outer lens is coupled to an upper portion of the housing; The lighting device according to claim 10 , wherein the outer lens overlaps the plurality of light-emitting elements in a vertical direction.

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