Lighting module and lighting device equipped therewith

Abstract

To provide a lighting device that prevents light loss due to the phosphor layer and improves visibility. [Solution] The lighting module 60 emits first light and second light, and an outer lens 70 is placed on the lighting module and blocks short wavelength light from the first light and second light and transmits long wavelength light, wherein the lighting module 60 includes a substrate 20, a plurality of light-emitting elements 30 placed on the substrate 20 and emitting first light, a resin layer 40 covering the plurality of light-emitting elements 30, and a phosphor layer 50 placed on the resin layer 40 and converting the first light into second light, wherein the first and second light travel through the phosphor layer 50 toward the outer lens 70, and the second light can pass through the outer lens 70.

Description

Technical Field

[0001] Embodiments of the invention relate to a lighting device including a light emitting module and a lens.

[0002] Embodiments of the invention relate to a lighting device that provides a surface light source.

Background Art

[0003] Typical lighting applications include not only vehicle lighting but also backlights for displays and signs. include backlights for displays and signs.

[0004] Light emitting elements, such as light emitting diodes (LEDs), have advantages such as low power consumption, semi - permanent life, fast response speed, safety, and environmental friendliness compared to existing light sources such as fluorescent lamps and incandescent lamps. Such light emitting diodes are applied to various lighting devices such as various display devices, indoor lights or outdoor lights. are applied.

[0005] Recently, as a vehicle light source, a lamp adopting a light emitting diode has been proposed. Compared with an incandescent lamp, the light emitting diode is advantageous in that it has low power consumption. However, since the emission angle of the light emitted from the light emitting diode is small, when using the light emitting diode as a vehicle lamp, there is a need for an increase in the light emitting area of the lamp using the light emitting diode. Also, since the light emitting diode is small in size, the degree of freedom in the design of the lamp can be increased, and there is also economic efficiency due to its semi - permanent life. there is a need for an increase in the light emitting area of the lamp using the light emitting diode. Also, since the light emitting diode is small in size, the degree of freedom in the design of the lamp can be increased, and there is also economic efficiency due to its semi - permanent life. can be increased, and there is also economic efficiency due to its semi - permanent life.

[0006] In a conventional vehicle lighting module, in order to form a uniform surface light source, a high - density phosphor layer is disposed on the light emitting element. In order to form a uniform surface light source, a high - density phosphor layer disposed ​Therefore, the light emitted from the light-emitting element is reflected or absorbed, and the light extraction efficiency of the lighting module is reduced. A problem arose where the light extraction efficiency of the lighting module decreased, and in order to prevent this decrease, a low density was used. The addition of a phosphor layer presented a problem: it was difficult to form a uniform surface light source. [Overview of the Initiative] [Problems that the invention aims to solve]

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

[0008] The example shows how a lens placed on a phosphor layer improves the light extraction efficiency of the illumination module. This allows us to provide a lighting device that can create a uniform surface light source. [Means for solving the problem]

[0009] According to an embodiment of the invention, the lighting device includes a lighting module that emits first light and second light, and a front It is placed on the lighting module and blocks the short wavelength light of the first light and the second light. The lighting module includes a lens that transmits long wavelength light, and the substrate A plurality of light-emitting elements that emit the first light are arranged on top of a tree that covers the plurality of light-emitting elements. It includes an oil layer and a phosphor layer disposed on the resin layer and converting the first light into the second light. The first and second lights can travel through the phosphor layer in the direction of the lens. The aforementioned second light can pass through the lens.

[0010] According to an embodiment of the invention, the lens is a red lens and is separated from the phosphor layer by a predetermined distance. They are placed at a distance from each other.

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

[0012] According to an embodiment of the invention, the lens may include a first lens disposed on the phosphor layer and a second lens disposed on the first lens.

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

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

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

[0016] According to an embodiment of the invention, the phosphor content of the phosphor layer may be 2 % or more and 10% or less based on the weight of the phosphor layer.

[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 170% to 210% of the light efficiency of the second light passing through the lens.

Effect of the Invention

[0018] The lighting device according to the embodiment allows the lens disposed on the phosphor layer to transmit red light and reflect blue light, thereby improving the visibility of the lighting module.

[0019] The lighting device according to the embodiment reduces the phosphor content by the lens disposed on the phosphor layer This allows for the provision of a uniform surface light source while preventing light loss due to the phosphor layer. can. [Brief explanation of the drawing]

[0020] [Figure 1] Figure 1 is a cross-sectional view of a lighting device according to an embodiment. [Figure 2] Figure 2 is a plan view of the light-emitting module according to the embodiment. [Figure 3] Figure 3 is a diagram showing the light intensity of a lighting device according to an embodiment, corresponding to the phosphor content. [Figure 4] Figure 4 is a diagram showing the transmittance of the outer lens of the lighting device according to the embodiment, corresponding to the wavelength. [Figure 5] Figure 5 shows a plan view of the lighting device for the comparative example and a diagram showing the intensity according to wavelength. [Figure 6] Figure 6 shows a plan view of the lighting device for the comparative example and a diagram showing the intensity according to wavelength. [Figure 7] Figure 7 is a plan view of the lighting device according to the embodiment and a diagram showing the intensity according to wavelength. [Figure 8] Figure 8 is a plan view of the lighting device according to the embodiment and a diagram showing the intensity according to wavelength. [Figure 9] Figure 9 is a diagram showing the irradiance of the examples and comparative examples according to wavelength. [Figure 10] Figure 10 is a cross-sectional view of a modified example of the lighting device according to the embodiment. [Figure 11] Figure 11 is a cross-sectional view of a modified example of the lighting device according to the embodiment. [Figure 12] Figure 12 is a cross-sectional view of a modified example of the lighting device according to the embodiment. [Figure 13] Figure 13 is a cross-sectional view of a modified example of the lighting device according to the embodiment. [Figure 14] Figure 14 is a diagram comparing a modified example of the lighting device according to the embodiment with a lighting device according to the comparative example. [Figure 15]Figure 15 is a plan view of a vehicle to which a lamp having a lighting module according to the embodiment is applied. [Figure 16] Figure 16 is a drawing showing a lamp having a lighting module or lighting device according to an embodiment. [Modes for carrying out the invention]

[0021] Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings.

[0022] However, the technical concept of the present invention is not limited to the embodiments described, but is diverse. It can be embodied in any form, and within the scope of the technical concept of the present invention, the components between embodiments It can be selectively combined or replaced and used. Also, used in the embodiments of the present invention Unless explicitly stated otherwise, the terminology (including technical and scientific terms) used in this invention refers to the subject matter of this invention. It is interpreted as a meaning that can be generally understood by someone with ordinary knowledge in that technical field, and is defined in dictionaries. Terms that are commonly used, such as those mentioned above, should be interpreted considering their meaning within the context of the technology they relate to. The meaning can be interpreted. Furthermore, the terms used in the embodiments of the present invention are used to describe the embodiments. This invention is intended for that purpose and is not intended to limit the present invention.

[0023] In this specification, the singular form may also include the plural form unless otherwise specified. If it says "at least one of A, B, and C (or one or more)", then A, B, and C It may include one or more of all possible combinations. In describing the components of the embodiment, terms such as 1st, 2nd, A, B, (a), (b) are used. This is possible. Such terminology is used to distinguish one component from another. Furthermore, the terminology does not limit the nature or order of the constituent elements. If it is stated that a component is “linked,” “joined,” or “connected” to another component, The components may be directly connected or linked to other components, or between each component This also includes all cases where other components are "linked," "joined," or "connected."

[0024] Furthermore, if it is stated that a component is formed or positioned "above or below" each component, then "above" "or below" refers not only to cases where two components are in direct contact, but also to cases where one or more other components are in direct contact. This also includes cases where an element is formed or positioned between two constituent elements. Also, "above or below" When expressed, it can mean 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 is suitable for a variety of lamp devices that require lighting, such as vehicle lamps. Applicable to household lighting fixtures or industrial lighting fixtures. For example, applicable to vehicle lamps. In this case, headlights, side lights, side mirror lights, fog lights, taillights, and brake lights are used. Lights: daytime running lights, interior lighting, door scuffs, rear combination lamps, reverse lights. Applicable to uplights, etc. The lighting device of the present invention is suitable for indoor and outdoor advertising devices and display devices. It can be applied to various electric vehicle fields, as well as other fields currently under development and commercialized. Or, all fields related to lighting and advertising that can be realized through future technological advancements. It can be said that this is applicable to the following.

[0026] Figure 1 is a cross-sectional view showing the lighting device according to the embodiment, and Figure 2 is a light-emitting module according to the embodiment. This is a cross-section of the tubing.

[0027] As shown in Figures 1 and 2, the lighting device 100 is a housing 10, the housing The lighting module 60 and outer lens 70 which are coupled with 10 may be included. The lighting module 60 includes a substrate 20, and a plurality of light-emitting elements 30 arranged on the substrate 20. A connector 24 that supplies power to the light-emitting element 30, and a resin layer 40 that covers the light-emitting element 30. The outer layer may include a phosphor layer 50 disposed on the resin layer 40. The element 70 is placed on top of the phosphor layer 50.

[0028] The housing 10 is positioned to surround the side of the lighting module 60, and the lighting It is coupled with the Bright Module 60.

[0029] The lighting module 60 emits light from the light-emitting element 30 as a surface light source. The above-mentioned light-emitting element 30 is arranged in multiple locations on the substrate 20. In 100, the multiple light-emitting elements 30 are arranged in N columns (where N is an integer greater than or equal to 1) or / and M rows (M The array consists of integers greater than or equal to 1. The plurality of light-emitting elements 30 are arranged in N columns and M columns, as shown in Figure 2. The data is arranged in rows (where N and M are integers greater than or equal to 2).

[0030] As shown in Figures 1 and 2, the substrate 20 is located beneath the multiple light-emitting elements 30 and the resin layer 40. It can function as a base member or support member located at [location]. The substrate 20 is [ It may include a printed circuit board (PCB). For example, the board 20 is Resin-based printed circuit boards (PCBs), metal core PCBs, flexible PCs B. May include at least one of ceramic PCB or FR-4 substrate.

[0031] The upper surface of the substrate 20 has a plane along the X-axis-Y-axis, and the thickness d1 of the substrate 20 is in the X direction. The height may also be in the Z direction, which is 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 both the X and Y directions. A third direction is also acceptable.

[0032] The substrate 20 includes a wiring layer (not shown) on its upper surface, and the wiring layer is connected to the light-emitting element 30. They are electrically connected. The substrate 20 has a reflective member or protective layer positioned on top of it. The wiring layer can be protected. The plurality of light-emitting elements 30 are connected to the wiring layer of the substrate 20 They are connected in series, parallel, or series-parallel. The plurality of light-emitting elements 30 have two or more The groups are connected in series or in parallel, or the groups are connected in series or in parallel. It will be done.

[0033] The length X1 in the first direction (X direction) and the length Y1 in the second direction (Y direction) of the substrate 20 are relative to each other. They may be different; for example, the length X1 in the first direction may be longer than the length Y1 in the second direction. Good. 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. It can have a range. Since the thickness d1 of the substrate 20 is made thin, the lighting module The thickness of the board is not increased. The substrate 20 is provided with a thickness d1 of 1.0 mm or less. Therefore, it can support a flexible module. The thickness d of the substrate 20 1 is 0.1 times or less the distance from the bottom surface of the substrate 20 to the top surface of the uppermost layer, or 0.1 It can have a range of 0.06 times. From the bottom surface of the substrate 20 to the top surface of the uppermost layer The spacing may be the thickness d1 of the substrate 20.

[0034] The distance from the bottom surface of the substrate 20 to the top surface of the phosphor layer 50, which is the uppermost layer, is the illumination module The thickness of the module 60 may be e1. The thickness e1 of the lighting module 60 is the same as that of the substrate 2 The shorter of the lengths x1 and y1 in the first direction (X direction) and second direction (Y direction) of 0 is 1 / 3 or less. The thickness e1 of the lighting module 60 may be lower, but is not limited to this. The bottom of the substrate 20 can be 6 mm or less, or have a range of 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, it can have a range of 120% to 200%. The lighting module 60 has a thickness Since the e1 is available in 4mm to 6mm sizes, it is a flexible and slim surface light source module. It can be provided.

[0035] If the thickness e1 of the lighting module 60 is thinner than the range, the light diffusion space is reduced. If a spot occurs and is larger than the aforementioned range, the increased thickness of the lighting module will spatially affect the area. Installation constraints and design flexibility are reduced. In the example, the thickness e1 of the lighting module 60 is 6 Provided in sizes of less than mm, and offered as a module capable of curved structures, allowing for design freedom. The degree and spatial constraints can be reduced. The lighting module 60 has a thickness that allows the lighting The ratio of the lengths Y1 in the Y direction of module 60 may be 1:m, and the ratio relationship is m≧1. It may have, where m is a natural number of at least 1, and the row of the light-emitting element 30 is It may be an integer smaller than m. For example, if m is less than the thickness e1 of the lighting module 60 If the size is four times or more, the light-emitting elements 30 are arranged in four rows.

[0036] The substrate 20 is equipped with a connector 24 in part, which supplies power to the plurality of light-emitting elements 30. It is possible. The region 23 on the substrate 20 where the connector 24 is located is The region 23 in which the resin layer 40 is not formed is the same as the length Y1 in the Y direction of the substrate 20. It may be small. The connector 24 is located on a portion of the upper or lower surface of the substrate 20. It is placed. When the connector 24 is placed on the bottom surface of the substrate 20, the area 23 is removed. The substrate 20 may be rectangular or square in its top view shape. It may also have other polygonal shapes, and may have a bar shape with a curved surface. The connector 24 is either a terminal connected to the light-emitting element 30 or a female connector. - Or a male connector may also be used.

[0037] The substrate 20 may include a protective layer or a reflective layer on top. The spray layer may include a member having a solder resist material, and the solder resist material The material, being white, can reflect incident light.

[0038] As another example, the substrate 20 may include a transparent material. Since a plate 20 is provided, the light emitted from the light-emitting element 30 is directed towards the upper surface of the substrate 20. And is emitted in the downward direction. At this time, the light emitted in the downward direction of the substrate 20 is the The light is reflected off the inner surface of the wug 10 and guided towards the outer lens 70.

[0039] The light-emitting element 30 is placed on the substrate 20. It has S1 and a number of side surfaces S2, and the light-emitting surface S1 faces the upper surface of the phosphor layer 50, Light is emitted in the direction of the phosphor layer 50. The light emission surface S1 is the upper surface of the light-emitting element 30, and Almost all light is emitted. The aforementioned numerous sides S2 include at least four sides, and light-emitting element Light is emitted to the side of the child 30. Such a light-emitting element 30 emits light from at least 5 sides. The ED chip is arranged 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 element 30 can also be embodied as a horizontal chip or a vertical chip, as an alternative example. This is possible. In the case of the horizontal or vertical chip, the wires can be used to connect other chips and wiring. It can be connected to a pattern. When a wire is connected to the LED chip, The thickness of the diffusion layer increases with the height of the wire, and the connecting space due to the length of the wire causes The distance between the optical elements 30 increases. The light-emitting element 30 in the embodiment emits light from five sides. The angle distribution becomes larger. The light-emitting element 30 is arranged on the substrate 20 as a flip chip. The spacing a1 between the light-emitting elements 30 is equal to the thickness b1 of the resin layer 40 (b1 ≤ a1) may be the same as or larger than a1). The interval a1 includes a range of 4 mm to 7 mm. For example, it can range from 6.5mm to 8mm and can be varied depending on the size of the LED chip. The minimum spacing between the light-emitting elements 30 is equal to or greater than the thickness b1 of the resin layer 40. It's fine.

[0041] The light-emitting element 30 disclosed in the embodiment is provided as a flip chip that emits light from at least 5 sides. Therefore, the brightness distribution and directional 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 column or N has two or more columns, and M can have one or more rows. N and M are 1 or more. It is an integer of the value. The light-emitting elements 30 are arranged in the Y-axis and X-axis directions, respectively.

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

[0044] Multiple light-emitting elements 30 arranged on the substrate 20 are sealed by a resin layer 40. The plurality of light-emitting elements 30 can come into contact with the resin layer 40. The resin layer 40 is placed on the side and top surface of 0. The light is emitted through the resin layer 40. The light emitted from the light-emitting element 30 is The resin layer 40 and the phosphor layer 50 placed on the resin layer 40 are released to the outside. The thickness b1 of the resin layer 40 is thinner than the thickness e1 of the lighting module 60, or the base The thickness d1 of the plate 20 and the thickness c1 of the phosphor layer 50 may be greater than the thickness of the resin layer, for example. The thickness b1 of part 40 can be 3mm to 5mm.

[0045] The resin layer 40 is made of a transparent resin material, such as UV (Ultra Violet) resin, silicone resin. It may be made of a resin material such as epoxy or a similar material. The resin layer 40 is a spreading agent-free spreading agent. It may be a dispersed layer or a molded layer. The UV resin may, for example, have urethane as the main material. It is possible to use a resin (oligomer type) that uses tanacrylate oligomer as the main raw material. It is possible. For example, by using a synthetic oligomer such as urethane acrylate oligomer. Yes, it is possible. The main material can be a low-boiling point dilutable reactive monomer called IBOA (isobornyl acrylate). (Isobornyl acrylate), HBA (Hydroxybutyl Acrylate (Hydroxybutyl Acrylate) (Hydroxymethethyl acrylic acid)), HEMA (Hydroxymethethyl acrylic acid) The monomer may further contain a mixture of (e.g., a photoinitiator) as an additive. , 1-hydroxycyclohexyl phenyl-ketone, Diphenyl(1-hydroxycyclohexyl phenyl Nyl-ketone, diphenyl)), Diphwnyl(2,4,6-trimethylbenzoyl phosphine oxide( Diphenyl (2,4,6-trimethylbenzoylphosphine oxide) or other antioxidants Stoppers and other substances can be mixed in. The UV resin consists of 10-21% oligomer and 3% monomer. The composition may consist of 0-63% of the material and 1.5-6% of additives. The formation of the resin layer using the composition involves forming a layer with a resin such as UV resin instead of a light guide plate. This makes it possible to adjust the refractive index and thickness, and also uses the above-mentioned composition to achieve adhesive properties. It is possible to satisfy all requirements regarding reliability and mass production speed.

[0046] A phosphor layer 50 is placed on top of the resin layer 40. It is positioned to cover the upper surface of 0. The phosphor layer 50 positioned on the resin layer 40 is The phosphor layer 50 extends along the side surface of the resin layer 40. It can surround. The phosphor layer 50, which is extended to the side surface of the resin layer 40, is the substrate It can come into contact with the upper surface of 20. The phosphor layer 50 has an outer lower end that is on the substrate 20. It can come into contact with the upper surface. The thickness c1 of the phosphor layer 50 is 0.5 mm to 1 mm. This is possible. The phosphor content of the phosphor layer 50 is the amount of phosphor relative to the weight of the phosphor layer 50. The phosphor content of the phosphor layer 50 may be the weight of the phosphor layer 50. The amount may be 2% to 10%. For example, the phosphor content of the phosphor layer 50 may be the same as that of the firefly. If the light-emitting layer 50 is less than 2% of the total weight, the lighting module 60 will exhibit a hot spot phenomenon. The amount of light converted by wavelength decreases. The phosphor content of the phosphor layer 50 is If the weight ratio of 50 is 10% or more, the light absorbed or reflected by the phosphor layer 50 The light emitted from the light-emitting element 30 decreases as the light extraction efficiency of the lighting module 60 increases. The first light L1 is diffused by the resin layer 40 and then into the phosphor contained in the phosphor layer 50 Therefore, it is converted to the second light L2. Also, the first light L1 emitted from the light-emitting element 30 It can be diffused by the resin layer 40 and pass through the phosphor layer 50. Therefore The light L1 emitted from the light-emitting element 30 is converted (L2) by the phosphor layer 50. Alternatively, the phosphor can pass through the phosphor layer 50 (L1) and face the outer lens 70. The photomaterial layer 50 has a low content of 2% to 10% by weight relative to the phosphor layer 50, The amount of light reflected or absorbed by the phosphor layer 50 is reduced. As a result, the phosphor As the amount of light passing through layer 50 or converted by the phosphor layer 50 increases, the illumination The light extraction efficiency of module 60 can be improved. Also, the phosphor layer 50 is low Having this content reduces the amount of light reflected or absorbed by the phosphor layer 50. The amount of light passing through the phosphor layer 50 increases, and the gap a1 between adjacent light-emitting elements 30 The thickness can be improved to 4mm-6mm or 7mm-8mm, and the light-emitting element is placed on the substrate 20. The number 30 can be reduced.

[0047] The phosphor layer 50 may include a transparent substance. It may contain a border material. The phosphor layer 50 may be made of silicone material, and each The silicone material may have different chemical bonds. For example, silicone may have no As a polymer formed by the bonding of silicon, an inorganic substance, and carbon, an organic substance, it contributes to the thermal stability and chemical properties of inorganic materials. Scientific stability, wear resistance, gloss, etc., and the properties of organic materials such as reactivity, solubility, elasticity, and processability. It possesses the following physical properties. Silicone is general silicone, and fluorine silicone has a higher fluorine ratio. It can contain fluorine. Increasing the fluorine ratio of fluorosilicone can improve moisture resistance. It has the effect of [doing something].

[0048] The phosphor layer 50 is subjected to wavelength conversion when light emitted from the light-emitting element 30 is incident on it. It may include wavelength conversion means for providing light. For example, the phosphor layer 50 is a phosphor The group may include at least one selected from the group including quantum dots, etc. Phosphors or quantum dots can emit blue, green, and red light.

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

[0050] If the phosphor is a red phosphor, the red phosphor has a wavelength from 610 nm to 650 nm. It can have a wavelength range of less than 10 nm, and the wavelength can have a width of less than 10 nm. The aforementioned red phosphor may include a fluoride-based phosphor.

[0051] The outer lens 70 is placed on the phosphor layer 50. , and is coupled with the housing 10. The outer lens 70 is connected to the side of the housing 1 A 0 may be positioned, and the outer lens 70 and the housing 10 may be coupled. The outer lens 70 is separated from the upper surface of the phosphor layer 50 by a predetermined gap G. The outer lens 70 is positioned to direct the light emitted from the illumination module 60 forward. It can concentrate the irradiation in one direction, or conversely, disperse the irradiation. The outer lens 70 may be a red lens. The outer lens 70 is made of PMMA(p It can be made of olymethylmethacrylate or PC (polycarbonate) material. Examples In the lighting device 100 relating to this, the light emitted from the lighting module 60 has different refractive indices. The phosphor layer 50 and the outer lens 70 have a phosphor layer 50 and the outer lens 7 By passing through the gap G between 0, the efficiency of light extraction to the outside can be improved. It can. Also, the first light L1 emitted from the light-emitting element 30 and passing through the phosphor layer 50 is The light is absorbed or reflected by the outer lens 70 and 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 the peak that may be generated by the first light L1. The hot spot phenomenon generated by the low-density phosphor layer 50 is then removed from the outlet. This can be prevented by the Tarlens 70.

[0052] In conventional vehicle lighting modules, when a low-density phosphor layer is placed on top of the light-emitting element, A problem arose in that it was difficult to form a uniform surface light source, and in order to solve this, high density was applied to the light-emitting element. A high-density phosphor layer was placed on top of the light-emitting element. However, when a high-density phosphor layer is placed on top of the light-emitting element, The dense phosphor layer reflects or absorbs the light emitted from the light-emitting element, and the illumination module A new problem arose where the light extraction efficiency of the material decreased. In the example, a low-density phosphor layer 50 was used. Even when placed on top of a light-emitting element, a uniform surface light source can be formed, and a low-density phosphor layer 50 is arranged. This prevents a decrease in light extraction efficiency in certain cases, and while forming a uniform surface light source, the light extraction efficiency is maintained. 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 phosphor layer 5 Because it contains a low content of 2% to 10% by weight, the light extraction of the lighting module 60 Efficiency can be improved, and the outer lens 70 placed 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 of the embodiment, the light emitted from the light-emitting element 30 has different refractive indices. A phosphor layer 50 and an outer lens 70 having the phosphor layer 50 and the outer lens The light is emitted to the outside through the gap G between the 70s, thus enhancing the light extraction effect of the lighting device 100. The rate can be improved.

[0054] Figure 3 shows the luminous efficiency of the lighting devices according to the phosphor content of the examples and comparative examples (ref). This is a drawing. Referring to Table 1 and Figure 3, the light emitted from the lighting devices of the comparative example and the example is Light efficiency can be determined. [Table 1]

[0055] Here, the optical efficiency of the module is determined by the light emitted from the light-emitting element through the resin layer 40 and the phosphor layer. This is the light efficiency measured when light is transmitted through a 50-degree beam. The light efficiency of the lens is measured from the light-emitting element of the lighting device. The light measured when the emitted light passes through the resin layer 40, the phosphor layer 50, and the outer lens 70. Efficiency, and in the comparative example (ref), light emitted from the light-emitting element of the lighting device reaches a resin layer, 20% This is the light efficiency measured when light is transmitted through the phosphor layer and ink layer containing the specified content.

[0056] In Table 1, when Ref and the phosphor content are 20% of the weight of the phosphor layer 50, In comparison, in the case of the Ref example, the light emitted from the light-emitting element passes through the resin layer, phosphor layer, The light efficiency measured after transmission through the ink layer was 32 lm / W, in the example after transmission through the lens. The light efficiency measured through the resin layer, phosphor layer, ink layer, and outer lens was 29 lm / W is the amount of phosphor in the light-emitting element of the embodiment, and the phosphor content is 20% of the weight of the phosphor layer 50. When the value is %, the light emitted from the light-emitting element passes through the resin layer 40 and the phosphor layer 50 and is measured. The measured light efficiency was 72 lm / W, measured after passing through the phosphor layer 50 and then through the outer lens 70. Since the specified luminous efficiency is 42 lm / W, the light emitted from the light-emitting element of the lighting device is ink It can be seen that when light is transmitted through the layer, the light extraction efficiency decreases significantly. Therefore, the light according to the example In the light-emitting device, light emitted from the light-emitting element is directed to the resin layer 40, the phosphor layer 50, and the outer lens 7 Since only 0 is transmitted, it was found that the light extraction efficiency is improved compared to when an ink layer is present. ru.

[0057] Furthermore, the phosphor content of the phosphor layer 50 in the example is 2% by weight of the phosphor layer 50. If the level is 10% or less, the amount of light emitted from the light-emitting element and measured externally gradually increases. It can be seen that the phosphor content of the comparative example and the example is 1 in weight of the phosphor layer 50. If it is 0% or higher, it is understood that the light efficiency emitted from the light-emitting element and measured externally decreases. Therefore, in the lighting device according to the embodiment, the phosphor content of the phosphor layer 50 is the phosphor layer If the amount of 50 is 2% or more and 10% or less by weight, the phosphor layer 50 will reflect or absorb the light. The amount of light absorbed is reduced, and the light loss due to the phosphor layer 50 can be reduced. The phosphor content of layer 50 can be in the range of 6% to 10%.

[0058] Furthermore, when the phosphor content is 2% or more and 10% or less by weight of the phosphor layer 50. Comparing the comparative example and the example, the light emitted from the light-emitting element of the lighting device reaches the resin layer 4 The light efficiency measured when light is transmitted through 0 and the phosphor layer 50 is the same for resin layer 40 and phosphor layer 50. This value is 170% to 210% higher than the light efficiency measured when light is transmitted through the outer lens 70. It can have.

[0059] Figure 4 is a diagram showing the transmittance of the outer lens according to wavelength. In the outer lens 70, the transmittance in the blue wavelength region, for example 420-480nm, is 5. Since it is within % of the limit, most blue light is not transmitted, and red wavelengths, such as 590-750nm, are not. Therefore, since the transmittance gradually increases, it can transmit most red light. As a result, the light-emitting element 30 is illuminated by the low-density phosphor layer 50 of the lighting device 100 according to the embodiment. A peak may occur in the wavelength region (blue) of the first light L1 emitted from the outer Lens 70 receives the first light L1 that passes through the phosphor layer 50 and heads toward the outer lens 70. It does not transmit the light, but transmits only the second light L2 converted by the phosphor layer 50, resulting in low density This prevents the generation of blue peaks caused by the phosphor layer 50 and improves light extraction efficiency. It is possible.

[0060] Figures 5 and 6 show the illumination of a comparative example that does not have a low-density phosphor layer and outer lens. Figures 7 and 8 are plan views of the lighting device and diagrams showing the intensity according to wavelength. Plan view and wavelength of an illumination device according to an embodiment comprising a low-density phosphor layer and an outer lens. These are diagrams showing the intensity corresponding to the wavelength. Figures 5, 6, 7, and 8. Comparing them, as shown in Figure 5, the lighting device in the comparative example has a low density phosphor Because a layer was used, a hot spot phenomenon occurred, but as shown in Figure 7, the embodiment is related to In this lighting device, the hot spot phenomenon does not occur even when a low-density phosphor layer is used. It can be seen that the visibility has improved compared to the lighting device in the comparative example.

[0061] Furthermore, as shown in Figure 6, the lighting device in the comparative example shows that light in the blue wavelength region Although some intensity is present, as shown in Figure 8, the lighting device according to the embodiment Therefore, it can be seen that the light intensity in the blue wavelength region decreased compared to the comparative example.

[0062] Figure 9 shows the irradiance (Irr) of the lighting devices according to the wavelength of Comparative Example 2 (dotted line) and the Example (solid line). This is a diagram showing irradiance according to wavelength as shown in Figure 9. The results of the comparative examples 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, the outer lens... The irradiance of the lighting device in Comparative Example 2, which does not include the outer lens 70, is lower than that of the example including the outer lens 70. It can be seen that the irradiance of the lighting device related to the example decreases by 44.1%. In the lighting device, the outer lens 70 reduces the illuminance in the blue wavelength region by 44.1%, resulting in blue light. This prevents the occurrence of peaks in the wavelength range.

[0064] Furthermore, in the red wavelength region, for example, the 590nm-750nm region, the outer lens is not included. The irradiance of the lighting device of Comparative Example 2, which is not comparable, is greater than that of the embodiment including the outer lens 70. It can be seen that the irradiance of the light source decreases by 6.0% and 2.1%, respectively. Therefore, Example A The lighting device including the outer lens 70 absorbs blue light and blue waves This prevents peaks from occurring in long regions, and allows red light to be transmitted without being absorbed. The use of a tar lens prevents a decrease in the extraction efficiency of red light.

[0065] Next, Figure 10 is a drawing showing a modified example of the lighting device according to the embodiment. In Figure 10, The content described in the description of the lighting device according to the embodiment shown in Figures 1 to 9 can be adopted.

[0066] The lighting device 100 consists of a lighting module 60 and an outer housing 10 that are coupled to the housing 10. It may include a lens 70. The outer lens 70 covers the entire upper surface of the phosphor layer 50. It can cover the body. The lower surface of the outer lens 70 is above the phosphor layer 50. It can come into contact with a surface.

[0067] In the lighting device 100 according to the embodiment shown in Figure 10, the upper surface of the phosphor layer 50 is in contact with It can include an outer lens 70. Since 0 and the phosphor layer 50 are bonded to the housing 10 without forming a gap, This reduces the size of the lighting fixture 100, increasing design flexibility.

[0068] Next, Figure 11 is a drawing showing a modified example of the lighting device according to the embodiment. In Figure 11, The content described in the description of the lighting device according to the embodiment shown in Figures 1 to 9 can be adopted.

[0069] The lighting device 100 includes a lighting module 60 coupled to the housing 10, and an inner rail The inner lens 70 may include an outer lens 80. The outer lens 80 can come into contact with the upper surface of the phosphor layer 50. It is positioned on top of the lens 70. The inner lens 70 is positioned in relation to the outer lens 80. They are arranged with a fixed gap G between them. The inner lens 70 is a red lens It may also be a s. The outer lens 80 can be made of a transparent material.

[0070] In the lighting device 100 according to the embodiment shown in Figure 11, the light emitted from the lighting module 60 The light has a predetermined gap between the inner lens 70 and the inner lens 70. The outer lens 80 and the inner lens 70 and the outer lens 80 are arranged It passes through the gap G and is emitted to the outside. As a result, from the lighting module 60 The emitted light has different refractive indices from the inner lens 70 and the outer lens The lens 80 passes through the gap G between the inner lens 70 and the outer lens 80. By releasing the light to the outside, the light extraction efficiency of the lighting device 100 can be improved.

[0071] Next, Figure 12 is a drawing showing a modified example of the lighting device according to the embodiment. In Figure 12, The content described in the description of the lighting device according to the embodiment shown in Figures 1 to 9 can be adopted.

[0072] The lighting device 100 includes a lighting module 60 coupled to the housing 10, and an inner rail The inner lens 70 may include an outer lens 80. The entire upper surface of the phosphor layer 50 can be covered. The inner lens 70 is the same as the fluorescent It can contact the upper surface of the light-emitting layer 50. The outer lens 80 is the inner lens It is positioned on top of the inner lens 70. The outer lens 80 is positioned on the upper surface of the inner lens 70. The entire thing can be covered. The lower surface of the outer lens 80 is the inner lens It can come into contact with the upper surface of 70. The inner lens 70 is a red lens. Good. The outer lens 80 can be made of a transparent material.

[0073] The lighting device 100 according to the embodiment shown in Figure 12 includes an inner lens 70 and the inner - It may include an outer lens 80 that contacts the upper surface of lens 70. Light emitted from the light module 60 passes through the outer lens 80 and the inner lens 70. This is then emitted to the outside. As a result, the inner lens 70 and the outer lens 8 Since 0 is coupled with the housing 10 without forming a gap, the lighting device 100 This reduces noise and increases design flexibility, and the light emitted from the lighting module 60 The light passes through the inner lens 70 and outer lens 80, which have different refractive indices. By emitting light to the outside, the light extraction efficiency of the lighting device 100 can be improved.

[0074] Figure 13 is a drawing showing a modified example of the lighting device according to the embodiment. In Figure 13, Figures 1 to 1 are shown. The content described in the illustration of the lighting device shown in Figure 9 can be adopted.

[0075] As shown in Figure 13, a modified example of the lighting device according to the embodiment is a housing 10, substrate 2 A lighting module 60 including a light-emitting element 30, a resin layer 40, a diffusion layer 55, and a phosphor layer 50. It can include a lens of 70.

[0076] Referring to Figure 13, the diffusion layer 55 is placed on top of the resin layer 40. The resin layer 40 is positioned to surround the side and top surfaces of the resin layer 40. The diffusion layer 55 is the resin The diffusion layer 55 is positioned to cover the oil layer 40. The diffusion layer 55 adheres to the resin layer 40 by applying a predetermined pressure or pressure / heat. This is possible. The diffusion layer 55 adheres to the resin layer 40 by its own adhesive strength without the need for a separate adhesive. This reduces the need for a separate adhesive application process, thus eliminating the use of adhesives that are harmful to the human body. Since it doesn't have to be used, it can reduce waste in processes and materials.

[0077] The diffusion layer 55 is bonded to the entire upper surface of the resin layer 40. The diffusion layer 55 is a light When the light intensity is high, certain colors may not mix properly, so we diffuse the light to help with mixing. This can be done. The material of the diffusion layer 55 may be a light-transmitting material. For example, The diffusion layer 55 is made of polyester (PET) film, PMMA (Polymethyl Methacrylat). e (polymethyl methacrylate) material and PC (polycarbonate) It may include at least one of the following: The diffusion layer 55 is made of silicone or epoxy It may be provided as a film made of such a resin material. The diffusion layer 55 may be a single layer or a multilayer. It can include...

[0078] The phosphor layer 50 is then arranged in a pattern shape, adhering to the lower surface of the diffusion layer 55. The pattern shape of the phosphor layer 50 can be triangular, square, or circular. However, it is not limited to this. The phosphor layer 50 corresponds to the light-emitting element 30. The phosphor layer 50 is arranged to overlap the light-emitting element 30 in a vertical direction. The color of the phosphor contained in the phosphor layer 50 and the color of the lens 70 may be the same. However, it is not limited to this. For example, the color of the phosphor contained in the phosphor layer 50 and If the color of the lens 70 is the same, a portion of the light emitted from the light-emitting element 30 is The light passes through the phosphor layer 50 and the lens 70 and is emitted to the outside of the lighting device, and the other part is in front The phosphor can enter the lens 70 without passing through the phosphor layer 50 and pass through the lens 70. It may not be able to be emitted to the outside. As a result, the light emitted from the light-emitting element 30 is The phosphor layer 50 separates the light that is emitted to the outside from the light that is not emitted to the outside, and to the outside This allows the image of the lighting device to 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 is not thinner than the thickness of the diffusion layer 55. However, it is not limited to this. The thickness of the phosphor layer 50 is equal to the thickness of the diffusion layer 55. If the thickness is greater than 5 μm or less, the lighting device will be turned on and emit light to the outside. In addition, the pattern shape of the phosphor layer 50 may not be recognizable. If the diffusion layer 55 is placed on the top layer and the lighting device is not turned on, the diffusion layer 55 will be exposed to external light. Prior recognition can improve the overall appearance of the lighting device.

[0080] As described above, in the modified example of the lighting device according to the embodiment, a hot spot phenomenon occurs. This prevents the image from being lost and makes it possible to realize the image of 50 different shapes for the phosphor layer.

[0081] Figure 14 is a diagram comparing lighting devices according to the example and comparative example. The example is shown in Figure 14. As shown in 13, the pattern of the phosphor layer 50 is arranged correspondingly on the upper part of the light-emitting element 30. The present invention relates to a lighting device in which a red lens is placed on the phosphor layer 50, and to a comparative example. In this configuration, the phosphor layer is not placed on top of the light-emitting element, and the red lens is placed on top of the light-emitting element. This concerns lighting devices that are not present.

[0082] Referring to Figure 14, we can compare the comparative example and the example by turning on the lighting devices of the comparative example and the example. If not, in the embodiment, the red lens is placed externally and the lighting device is red when not lit. Because it appears in this way, the appearance can be improved compared to the comparative example.

[0083] When the lighting devices of the comparative example and the embodiment are turned on, in the comparative example, the lighting device is placed inside the lighting device. The projected light-emitting element is shown as is, but in this embodiment, the upper part of the light-emitting element 30 is The phosphor layer 50 that is placed there projects the image of the light-emitting element 30 located inside the lighting device. Since this does not occur, the appearance can be improved. And, the lighting device according to the embodiment Therefore, the image corresponding to the pattern of the phosphor layer 50 can be recognized externally, Since the image of the lighting device can be realized according to the shape of the pattern, a wide variety of image devices We can provide a lighting device that enables this.

[0084] Figure 15 is a plan view of a vehicle to which the lighting device according to the embodiment is applied, with the lamps applied. Figure 16 shows a vehicle having a lighting module or lighting device disclosed in the embodiment. This is a diagram showing the pump.

[0085] Referring to Figures 15 and 16, in vehicle 900, the taillight (800) is the first lamp unit Knit 812, second lamp unit 814, third lamp unit 816, and housing It may include 810. Here, the first lamp unit 812 serves as a turn signal. It may also be a light source for the purpose of, and the second lamp unit 814 is for the purpose of serving as a vehicle side marker light. It may also be a light source, and the third lamp unit 816 is a light source for the role of a brake light. This is acceptable, but is not limited to this. The first lamp unit to the third lamp unit At least one or all of knits 812, 814, and 816 are disclosed in the examples. Lighting modules may be included. The housing 810 includes the first lamp unit to the It can house three lamp units 812, 814, and 816 and be made of a translucent material. At this time, the housing 810 may have a bend according to the design of the vehicle body, Lamp units 1 through 3, 812, 814, and 816, are located in housing 810. A surface light source that can have a curved surface depending on its shape can be realized. The lamps are applicable to the taillights, brake lights, and turn signal lamps of a vehicle. If applicable, it can be applied to the vehicle's turn signal lamps.

[0086] The features, structure, and effects described in the above examples are those of at least one embodiment of the present invention. This includes and is not necessarily limited to a single embodiment. Furthermore, the features illustrated in each embodiment Characteristics, structure, effects, etc., are described by a person with ordinary skill in the field to which the examples belong, and may differ from those described in other examples. The examples can be combined or modified to implement the changes. The content described herein should be interpreted as being within the scope of the present invention.

[0087] Furthermore, although the above description has focused on examples, these are merely illustrative and do not limit the present invention. Rather than that, a person with ordinary skill in the art to which this invention belongs would understand the essence of this embodiment. Within the bounds of not deviating from its inherent characteristics, a wide variety of modifications and applications not exemplified above are possible. For example, each component specifically presented in the examples can be modified and implemented. The differences relating to such modifications and applications are defined in the present invention as specified in the attached claims. It should be interpreted as being included within the scope of [the relevant category].

Claims

1. A lighting module that emits first light and second light, It is placed on the aforementioned lighting module and blocks the short-wavelength light from the first light and the second light. It includes a lens that cuts and transmits long-wavelength light, The aforementioned lighting module is circuit board and A plurality of light-emitting elements that are arranged on the substrate and emit the first light, A resin layer arranged to cover the plurality of light-emitting elements, The resin layer includes a phosphor layer disposed on top of the resin layer and converting the first light into a second light, The first and second light rays travel through the phosphor layer in the direction of the lens. The second light is transmitted through the lens by the lighting device.

2. The lens is a red lens and is positioned at a predetermined distance from the phosphor layer, claim The lighting device described in item 1.

3. The lens is a red lens, and the lower surface of the lens is in contact with the upper surface of the phosphor layer. The lighting device according to claim 1.

4. The lens comprises a first lens disposed on the phosphor layer and a lens disposed on the first lens The illumination device according to claim 1, comprising a second lens that is positioned.

5. The second lens is arranged at a predetermined distance from the first lens, as described in claim 4. Lighting device.

6. The lower surface of the second lens is in contact with the upper surface of the first lens, as described in claim 4. Place.

7. The first lens is a red lens, The illumination device according to any one of claims 4 to 6, wherein the second lens is a transparent lens. Place.

8. The phosphor content of the phosphor layer is 2% or more and 10% or less relative to the weight of the phosphor layer. or the lighting device according to any one of claims 1 to 6.

9. The optical efficiency of the first and second light that passed through the phosphor layer is the optical efficiency of the light that passed through the lens. The lighting device according to claim 8, wherein the light efficiency of the second light is 170% to 210%.

10. Lighting module and Includes a lens placed on the aforementioned lighting module, The aforementioned lighting module is circuit board and A plurality of light-emitting elements are arranged on the substrate and emit first light, A resin layer arranged to cover the plurality of light-emitting elements, A diffusion layer is arranged to cover the aforementioned resin layer, It includes a phosphor layer disposed between the resin layer and the diffusion layer, The phosphor layer converts the first light into a second light having a longer wavelength than the first light. The lens is an illumination device that absorbs or reflects the first light and transmits the second light.

11. The diffusion layer is arranged to surround the side and top surfaces of the resin layer, as described in claim 10. Lighting device.

12. The phosphor layer is arranged in a region that overlaps perpendicularly with the light-emitting element, as described in claim 10. A mounted lighting device.

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