KR102640552B1 - Lighting module and lighting apparatus having thereof - Google Patents

Abstract

The lighting device disclosed in the embodiment includes a rotating body; a plurality of blades along the outer peripheral surface of the rotating body; and a first lighting module disposed on the surface of the rotating body or the front of the blade, wherein the first lighting module includes: a substrate attached to one surface of the rotating body or the front of the blade; A plurality of light emitting devices on the substrate; A first resin layer covering the light emitting device, and at least one upper resin layer on the first resin layer, wherein at least one of the first resin layer and the at least one upper resin layer includes a phosphor, The at least one upper resin layer may include at least one of ink particles and a diffusion agent.

Description

Lighting module and lighting device having the same {LIGHTING MODULE AND LIGHTING APPARATUS HAVING THEREOF}

An embodiment of the invention relates to a lighting module having a light-emitting element.

Embodiments of the invention relate to a lighting module having a light emitting element and a plurality of resin layers.

Embodiments of the invention relate to lighting modules that provide area light sources.

Embodiments of the invention relate to a light unit or vehicle lamp having a lighting module.

Embodiments of the invention relate to a floating or rotating lighting module or a lighting device having the same.

Typical lighting applications include backlights for displays and signage, as well as automotive lights.

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

Recently, lamps employing light-emitting diodes have been proposed as light sources for vehicles. Compared to incandescent lamps, light emitting diodes have an advantage in that they consume less power. However, because the emission angle of light emitted from a light emitting diode is small, when a light emitting diode is used as a vehicle lamp, there is a need to increase the light emitting area of the lamp using the light emitting diode.

Because light emitting diodes are small in size, they can increase the design freedom of lamps and are economical due to their semi-permanent lifespan.

Embodiments of the invention may provide a lighting module that provides a surface light source.

Embodiments of the invention can provide a lighting module in which a resin layer is disposed on a plurality of light-emitting devices.

Embodiments of the invention can provide a lighting module in which a plurality of resin layers are disposed on light-emitting elements having a plurality of light emission surfaces.

Embodiments of the invention may provide a lighting module in which a phosphor is added to at least one of a plurality of resin layers on a circuit board and a light emitting device.

Embodiments of the invention can provide a lighting module having ink particles in at least one of a plurality of resin layers disposed on a circuit board and a light emitting device.

Embodiments of the invention can provide a lighting module having a phosphor in a resin layer spaced apart from the circuit board and the light emitting device.

Embodiments of the invention can provide a lighting module having ink particles in a resin layer spaced apart from the circuit board and the light emitting device.

Embodiments of the invention may provide a lighting module in which phosphor and ink particles are added to at least one of a plurality of resin layers disposed on a circuit board.

Embodiments of the invention can provide a lighting module in which ink particles are added to the top layer of a plurality of resin layers disposed on a circuit board and a light emitting device.

Embodiments of the invention provide a flexible lighting module having a plurality of light-emitting devices and a plurality of resin layers.

Embodiments of the invention provide a lamp having a lighting module disposed on a rotating member.

An embodiment of the invention provides a lamp having a lighting module at a position opposite to the rotating member.

Embodiments of the invention provide a lighting module with improved light extraction efficiency and light distribution characteristics.

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

Embodiments of the invention may provide a light unit, a liquid crystal display, or a vehicle lamp having a lighting module.

A lighting device according to an embodiment of the invention includes a rotating body; a plurality of blades along the outer peripheral surface of the rotating body; and a first lighting module disposed on the surface of the rotating body or the front of the blade, wherein the first lighting module includes: a substrate attached to one surface of the rotating body or the front of the blade; a plurality of light emitting devices on the substrate; A first resin layer covering the light emitting device, and at least one upper resin layer on the first resin layer, wherein at least one of the first resin layer and the at least one upper resin layer includes a phosphor, The at least one upper resin layer may include at least one of ink particles and a diffusion agent.

According to an embodiment of the invention, the first lighting module is disposed on the entire front surface of the blade, and the surface color of the first lighting module may include the same color as the ink particles.

According to an embodiment of the invention, the first lighting module may include a plurality of lighting modules that emit different lights on the front surfaces of different blades.

According to an embodiment of the invention, it includes a second lighting module disposed on the rear of the blade, wherein the first lighting module emits red light, and the second lighting module may emit yellow or blue light.

According to an embodiment of the invention, the first lighting module may be arranged along the outer peripheral surface of the rotating body.

According to an embodiment of the invention, the blade may include a thermally conductive material or a transparent material, and the rotating body may include a transparent material.

According to an embodiment of the invention, the at least one upper resin layer includes at least one of a diffusion layer and a second resin layer, the second resin layer includes ink particles, and the second resin layer includes the first resin. It extends to the side of the layer and may contact the top surface of the substrate.

According to an embodiment of the invention, the second resin layer includes a phosphor, the emission wavelength of the phosphor and the ink particle include the same red color, and the content of the phosphor in the second resin layer is 12 wt% to 23 wt. % range, and the content of the ink particles in the second resin layer may range from 3 wt% to 13 wt%.

According to an embodiment of the invention, the light emitting device includes: a substrate made of a light-transmitting material; a light emitting structure having a first conductive semiconductor layer, an active layer, and a second conductive semiconductor layer below the substrate; a first electrode connected to the first conductive semiconductor layer below the light emitting structure; It includes a second electrode connected to the second conductive semiconductor layer below the light emitting structure, and the first and second electrodes of the light emitting device may be connected to the circuit board in a flip manner.

According to an embodiment of the invention, light uniformity of a surface light source in a lighting module can be improved.

According to an embodiment of the invention, the uniformity of the planar light source can be improved by guiding and diffusing light from the lighting module.

According to an embodiment of the invention, the uniformity of the wavelength-converted light can be improved by converting the light diffused from the lighting module into a phosphor.

According to an embodiment of the invention, hot spots on each light-emitting element in a lighting module can be reduced.

According to an embodiment of the invention, a colored phosphor film is provided on the lighting module, so that an image can be realized in the color of the phosphor film when turned on.

According to an embodiment of the invention, a flexible lighting module can be implemented by stacking a plurality of diffusion layers made of resin material.

According to an embodiment of the invention, a lamp capable of dynamic lighting can be provided by placing a lighting module on the surface of a rotating member or a structure facing the rotating member.

According to an embodiment of the invention, the heat dissipation effect when the lighting module is driven can be improved by arranging the lighting module on the surface of the rotating member or on the structure facing the rotating member.

According to an embodiment of the invention, the light efficiency and light distribution characteristics of the lighting module can be improved.

Embodiments of the invention can reduce the difference in chromaticity between the external image of the resin layer of the lighting module and the luminous image.

An embodiment of the invention can reduce the amount of phosphor by placing ink particles having the same color as the luminous color of the phosphor on the top layer of the lighting module.

Embodiments of the invention can improve the unlit color of the lighting module.

The optical reliability of the lighting module and the lighting device having the same according to an embodiment of the invention can be improved.

The reliability of a vehicle lighting device having a lighting module according to an embodiment of the invention can be improved.

Embodiments of the invention can be applied to backlight units with lighting modules, various display devices, surface light source lighting devices, or vehicle lamps.

1 is a side cross-sectional view showing a lighting module according to a first embodiment of the invention.
Figure 2 is an example of a top view of the lighting module of Figure 1.
Figure 3 is a diagram showing a first modified example of the lighting module of Figure 1.
Figure 4 is a diagram showing a second modified example of the lighting module of Figure 1.
Figure 5 is another example of the lighting module of Figure 4.
Figure 6 is a diagram showing a third modified example of the lighting module of Figure 1.
Figure 7 is another example of the lighting module of Figure 6.
Figure 8 is a diagram showing a fourth modified example of the lighting module of Figure 1.
Figure 9 is another example of the lighting module of Figure 8.
Figure 10 is another example of the lighting module of Figure 1.
Figure 11 is a fifth modified example of the lighting module of Figure 1.
Figure 12 is another example of the lighting module of Figure 11.
Figure 13 is a sixth modified example of the lighting module of Figure 1.
Figure 14 is an example of a side cross-sectional view of a lighting module according to a second embodiment of the invention.
Figure 15 is a first modified example of the lighting module according to the second embodiment.
Figure 16 is a second modified example of the lighting module of Figure 15.
Figure 17 is a third modified example of the lighting module according to the second embodiment.
Figure 18 is a fourth modified example of the lighting module according to the second embodiment.
Figure 19 is a fifth modified example of the lighting module according to the second embodiment.
Figure 20 is a sixth modified example of the lighting module according to the second embodiment.
Figure 21 is a seventh modified example of the lighting module according to the second embodiment.
Figure 22 is an example of an eighth modification of the lighting module according to the second embodiment.
Figure 23 is a ninth modified example of the lighting module according to the second embodiment.
Figure 24 is a tenth modified example of the lighting module according to the second embodiment.
Figure 25 is an 11th modified example of the lighting module according to the second embodiment.
FIG. 26 is a diagram illustrating an example of a change in surface color according to the turn-on or turn-off of a light emitting device in a resin layer with ink particles according to the second embodiment.
Figure 27 is an example of a lamp to which lighting modules according to the first and second embodiments are applied in the third embodiment of the invention.
FIG. 28 is an example of a blade portion on which a lighting module is disposed in the lamp of FIG. 27.
FIG. 29 is another example of the blade portion on which the lighting module is disposed in the lamp of FIG. 27.
Figure 30 is an example of the blade portion where the lighting module in Figures 28 and 29 is disposed.
Figure 31 is another example in which the lighting module according to an embodiment of the invention is arranged above and below the blade part.
Figure 32 is an example in which a light emitting element is disposed on one surface of the rotating body of the blade unit in an embodiment of the invention.
Figure 33 is an example of a lighting module in which a light emitting element is coupled to a recess disposed on one side of the rotating plate of Figure 32.
FIG. 34 is another example of FIG. 32 in which a light emitting element is disposed at a position corresponding to the blade around the rotating body.
FIG. 35 is a diagram showing the path along which light emitted from the light emitting device in FIG. 34 is irradiated to the blade.
Figure 36 is another example of a blade portion on which a light emitting element is disposed according to an embodiment of the invention.
Figure 37 is an exploded side cross-sectional view of the reflective layer of the housing disposed around the blade portion of Figure 36;
Figure 38 is a cross-sectional view of the front side of the blade portion and the fixed body of the housing where the light emitting device is disposed, according to an embodiment of the invention.
Figure 39 is an example of a light emitting device in a lighting module according to an embodiment of the invention.
40 is a plan view of a vehicle to which a lamp having a lighting module according to an embodiment is applied.
41 is a diagram showing a lamp having a lighting module or lighting device according to an embodiment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

However, the technical idea of the present invention is not limited to some of the described embodiments, but may be implemented in various different forms, and as long as it is within the scope of the technical idea of the present invention, one or more of the components may be optionally used between the embodiments. It can be used by combining and replacing. In addition, terms (including technical and scientific terms) used in the embodiments of the present invention, unless specifically defined and described, are generally understood by those skilled in the art to which the present invention pertains. It can be interpreted as meaning, and the meaning of commonly used terms, such as terms defined in a dictionary, can be interpreted by considering the contextual meaning of the related technology. Additionally, the terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention. In this specification, the singular may also include the plural unless specifically stated in the phrase, and when described as "at least one (or more than one) of A and B and C", it is combined with A, B, and C. It can contain one or more of all possible combinations. Additionally, when describing the components of an embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the essence, order, or order of the component is not determined by the term. And, when a component is described as being 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also is connected to the other component. It may also include cases where other components are 'connected', 'coupled', or 'connected' by another component between them. Additionally, when described as being formed or disposed "above" or "below" each component, "above" or "below" refers not only to cases where two components are in direct contact with each other, but also to one This also includes cases where another component described above is formed or placed between two components. In addition, when expressed as "top (above) or bottom (bottom)", it can include not only the upward direction but also the downward direction based on one component.

The lighting device according to the present invention can be applied to various lamp devices that require lighting, such as vehicle lamps, household lighting devices, or industrial lighting devices. For example, when applied to vehicle lamps, head lamps, side lights, side mirror lights, fog lights, tail lamps, brake lights, daytime running lights, vehicle interior lights, door scars, rear combination lamps, backup lamps Applicable to etc. The lighting device of the present invention can be applied to indoor and outdoor advertising devices, display devices, and various electric train fields. In addition, it can be applied to all lighting-related fields or advertising-related fields that are currently developed and commercialized or can be implemented in the future according to technological development. It will be said that it is.

<First embodiment>

Figure 1 is a side cross-sectional view showing a lighting module according to a first embodiment, and Figure 2 is an example of a top view of the lighting module of Figure 1.

Referring to Figures 1 and 2, the lighting module 100 includes a substrate 11, a light emitting device 21 disposed on the substrate 11, and a light emitting device 21 covering the light emitting device 21 on the substrate 11. It may include a first resin layer 31 and at least one upper layer 41 and 51 on the first resin layer 31.

The lighting module 100 may emit light emitted from the light emitting device 21 as a surface light source. The lighting module 100 may include a reflective member disposed on the upper surface of the substrate 11. The reflective member may reflect light traveling toward the upper surface of the substrate 11 to the first resin layer 31. The light emitting devices 21 may be disposed on the substrate 11 in plural numbers. In the lighting module 100, the plurality of light emitting elements 21 may be arranged in N columns (N is an integer greater than 1) or/and M rows (M is an integer greater than 1). The plurality of light emitting devices 21 may be arranged in N columns and M rows (N and M are integers of 2 or more) as shown in FIG. 2. The lighting module 100 can be applied to various lamp devices that require lighting, such as vehicle lamps, household lighting devices, and industrial lighting devices. For example, in the case of lighting modules applied to vehicle lamps, head lamps, side lights, side mirror lights, fog lights, tail lamps, turn signal lamps, back up lamps, and stop lamps. ), daytime running lights, vehicle interior lighting, door scarf, rear combination lamp, backup lamp, etc.

1 and 2, the substrate 11 may function as a base member or support member located below the light emitting device 21 and the first resin layer 31.

The substrate 11 includes a printed circuit board (PCB). The board 11 may include, for example, at least one of a resin-based printed circuit board (PCB), a metal core PCB, a flexible PCB, a ceramic PCB, or an FR-4 board. . The substrate 11 may include, for example, a flexible PCB or a rigid PCB. The upper surface of the substrate 11 has an X-axis-Y axis plane, and the thickness of the substrate 11 may be the height of the Z direction orthogonal to the X and Y directions. Here, the X direction may be a first direction, the Y direction may be a second direction orthogonal to the X direction, and the Z direction may be a third direction orthogonal to the X and Y directions.

The substrate 11 includes a wiring layer (not shown) on the top, and the wiring layer may be electrically connected to the light emitting device 21. A reflective member or protective layer disposed on the substrate 11 may protect the wiring layer. The plurality of light emitting devices 21 may be connected in series, parallel, or series-parallel by the wiring layer of the substrate 11. The plurality of light emitting devices 21 may be connected in series or parallel in groups of two or more, or the groups may be connected in series or parallel.

The length (x1) in the X direction and the length (y1) in the Y direction of the substrate 11 may be different from each other. For example, the length (x1) in the The length (x1) in the X direction may be arranged to be twice or more than the length (y1) in the Y direction. The thickness of the substrate 11 may be 0.5 mm or less, for example, in the range of 0.3 mm to 0.5 mm. Since the thickness of the substrate 11 is thin, the thickness of the lighting module may not be increased. Since the substrate 11 is provided with a thickness of 0.5 mm or less, it can support a flexible module. The thickness of the substrate 11 may be less than or equal to 0.1 times the distance from the bottom of the substrate 11 to the top of the uppermost layer 51, or may range from 0.1 to 0.06 times. The distance from the bottom of the substrate 11 to the top of the uppermost layer 51 may be the module thickness.

The thickness of the lighting module 100 may be less than 1/3 of the shorter length (x1, y1) of the substrate 11 in the X and Y directions, but is not limited thereto. The thickness of the lighting module 100 may be 5.5 mm or less from the bottom of the substrate 11, may be in the range of 4.5 mm to 5.5 mm, or may be in the range of 4.5 mm to 5 mm. The thickness of the lighting module 100 may be the straight line distance between the lower surface of the substrate 11 and the upper surface of the upper layers 41 and 51. The thickness of the lighting module 100 may be 220% or less of the thickness of the first resin layer 31, for example, in the range of 180% to 220%. Since the lighting module 100 is provided with a thickness of 5.5 mm or less, it can be provided as a flexible and slim surface light source module.

If the thickness of the lighting module 100 is thinner than the above range, the light diffusion space may be reduced and a hot spot may occur, and if it is greater than the above range, spatial installation restrictions and design freedom may be reduced due to an increase in module thickness. The embodiment provides the lighting module 100 with a thickness of 5.5 mm or less or 5 mm or less, and provides a module capable of a curved structure, thereby reducing design freedom and spatial constraints. The ratio of the length (y1) in the Y direction of the lighting module 100 to the thickness of the lighting module 100 may be 1:m, and may have a ratio relationship of m=1, where m is at least 1. It is a natural number or more, and the row of the light emitting device 21 may be an integer smaller than m. For example, if m is 4 times greater than the thickness of the lighting module 100, the light emitting devices 21 may be arranged in 4 rows.

The substrate 11 may have a connector 14 on a portion thereof to supply power to the light emitting elements 21. The area 13 of the substrate 11 where the connector 14 is disposed is an area where the first resin layer is not formed, and may be equal to or smaller than the Y-direction length (y1) of the substrate 11. The connector 14 may be disposed on a portion of the upper or lower surface of the substrate 11. If the connector 14 is placed on the bottom of the substrate 11, this area can be removed. The substrate 11 may have a top view shape of a rectangle, a square, or another polygonal shape, or may have a curved bar shape. The connector 14 may be a terminal connected to the light emitting device 21 or may be a female connector or a male connector.

The substrate 11 may include a protective layer or a reflective layer on top. The protective layer or reflective layer may include a member made of a solder resist material, and the solder resist material is a white material and can reflect incident light.

As another example, the substrate 11 may include a transparent material. Since the substrate 11 is made of a transparent material, light emitted from the light emitting device 21 can be emitted in the upper and lower directions of the substrate 11.

The light emitting device 21 may be disposed on the substrate 11 and sealed by the first resin layer 31. The plurality of light emitting devices 21 may be in contact with the first resin layer 31. The first resin layer 31 may be disposed on the side and top surfaces of the light emitting device 21. The first resin layer 31 protects the light emitting devices 21 and may be in contact with the upper surface of the substrate 11.

Light emitted from the light emitting device 21 may be emitted through the first resin layer 31. The light emitting device 21 has a light emitting surface S1 and a plurality of side surfaces S2, and the light emitting surface S1 faces the upper surfaces of the upper layers 41 and 51 and the upper layers 41 and 51. ) The light is emitted in the direction. The light emission surface S1 is the upper surface of the light emitting device 21 and emits most of the light. The plurality of side surfaces S2 includes at least four sides and emits light in a side direction of the light emitting device 21. This light emitting device 21 is an LED chip that emits light on at least five sides, and may be placed on the substrate 11 in the form of a flip chip. The light emitting device 21 may be formed to have a thickness of 0.3 mm or less. As another example, the light emitting device 21 may be implemented as a horizontal chip or a vertical chip. In the case of the horizontal chip or vertical chip, it can be connected to another chip or wiring pattern by a wire. When a wire is connected to the LED chip, the thickness of the diffusion layer may increase due to the height of the wire, and the distance between the light emitting devices 21 may increase due to the connection space according to the length of the wire. The light emitting device 21 according to the embodiment may emit light from five sides, thereby increasing the beam angle distribution. The light emitting device 21 may be disposed on the substrate 11 as a flip chip. The gap (a) between the light emitting devices 21 may be equal to or greater than the thickness (b, b=a) of the first resin layer 31. The spacing (a) may be, for example, 2.5 mm or more, and may vary depending on the LED chip size. The minimum gap between the light emitting devices 21 may be equal to or greater than the individual thickness of each first resin layer 31.

Since the light emitting device 21 disclosed in the embodiment is provided as a flip chip that emits light on at least five sides, the luminance distribution and beam angle distribution of the light emitting device 21 can be improved. It can be seen that the lighting module of the embodiment does not generate dark areas even if the spacing between light-emitting elements is arranged wider. In addition, the beam angle distribution of the light emitting device can be provided at 130 degrees or more. In other words, the beam angle distribution becomes wider, which can provide a light diffusion effect, reduce the occurrence of dark areas, and increase the spacing between light emitting devices.

When the light emitting elements 21 are arranged in an NХM matrix on the substrate 11, N may be one or more columns, and M may be one or more rows. The N and M are integers of 1 or more. The light emitting elements 21 may be arranged in the Y-axis and X-axis directions, respectively.

The light emitting device 21 is a light emitting diode (LED) chip and can emit at least one of blue, red, green, ultraviolet (UV), or infrared light. The light emitting device 21 may emit light, for example, at least one of blue, red, and green. The light emitting device 21 may be electrically connected to the substrate 11, but is not limited thereto.

The light emitting device 21 may be sealed on the surface with a transparent insulating layer or resin, but is not limited thereto. The light emitting device 21 may have a phosphor layer having a phosphor on its surface.

The light emitting device 21 may have a support member having a ceramic support member or a metal plate disposed at the bottom, and the support member may be used as an electrically conductive and heat-conductive member.

A lighting module according to an embodiment may include a light emitting element 21 and a plurality of resin layers on the substrate 11. The plurality of resin layers may include, for example, two or more layers or three or more layers. The plurality of resin layers may optionally include at least two or three layers among a layer without impurities, a layer to which a phosphor is added, a layer with a diffusion agent, and a layer to which a phosphor/diffuser is added. At least one of the plurality of resin layers may optionally include at least one of a diffusion agent, a phosphor, and ink particles. That is, the phosphor and the diffuser may be added to separate resin layers, or may be mixed with each other and placed in one resin layer. The impurities may include phosphors, diffusion agents, or ink particles. The layers each provided with the phosphor and the diffusion agent may be arranged adjacent to each other or spaced apart from each other. When the phosphor and the layer on which the diffusion agent is disposed are separated from each other, the layer on which the phosphor is disposed may be disposed above the layer on which the diffusion agent is disposed. The phosphor and ink particles may be placed on the same layer or may be placed on different layers. The resin layer to which the INK particles are added may be disposed higher than the resin layer to which the phosphor is added.

The phosphor may include at least one of blue phosphor, green phosphor, red phosphor, amber phosphor, and yellow phosphor. The size of the phosphor may range from 1 ㎛ to 100 ㎛. The higher the density of the phosphor, the higher the wavelength conversion efficiency, but since the luminous intensity may decrease, it can be added within the above size taking light efficiency into consideration. The diffusion agent may include at least one of PMMA (Poly Methyl Meth Acrylate) series, TiO ₂ , SiO ₂ , Al ₂ O ₃ , and silicon series. The diffuser has a refractive index in the range of 1.4 to 2 at the emission wavelength, and its size may be in the range of 1 ㎛ to 100 ㎛. The dispersing agent may have a spherical shape, but is not limited thereto. For example, when the diffusing agent has a refractive index of 1.4 or more, the uniformity of light may be 90% or more, or when the size of the diffuser is in the range of 1 ㎛ to 30 ㎛, the uniformity of light may be 90% or more. The light uniformity is the light uniformity in the area where the light emitting elements are connected to each other, and can be provided at 90% or more.

The ink particles may include at least one of metallic ink, UV ink, or curing ink. The size of the ink particles may be smaller than the size of the phosphor. The surface color of the ink particles may be any one of green, red, yellow, and blue. The types of ink include PVC (poly vinyl chloride) ink, PC (polycarbonate) ink, ABS (acrylonitrile butadiene styrene copolymer) ink, UV resin ink, epoxy ink, silicone ink, PP (polypropylene) ink, water-based ink, plastic ink, and PMMA. (poly methyl methacrylate) ink and PS (polystyrene) ink can be selectively applied. Here, the width or diameter of the ink particles may be 5㎛ or less, for example, in the range of 0.05㎛ to 1㎛. At least one of the ink particles may be smaller than the wavelength of light. The color of the ink particles may include at least one of red, green, yellow, and blue. For example, the phosphor emits red wavelengths, and the ink particles may contain red. For example, the red color of the ink particles may be darker than the color of the phosphor or the wavelength of light. The ink particles may have a color different from the color of light emitted from the light emitting device. The ink particles can have the effect of blocking or blocking incident light.

The resin layer may include resin or a resin-based material. The plurality of resin layers may have the same refractive index, or at least two layers may have the same refractive index, or the layers adjacent to the uppermost layer may have gradually lower or higher refractive indices.

Referring to FIG. 1, the lighting module 100 may include at least one upper layer on the first resin layer 31. The upper layer may include a first diffusion layer 41 disposed on the first resin layer 31 and a second diffusion layer 51 disposed on the first diffusion layer 41. The first and second diffusion layers 41 and 51 may be resin layers disposed on top of the first resin layer 31. Alternatively, the first diffusion layer 41 may be defined as a second resin layer disposed on the first resin layer, and the second diffusion layer 51 may be defined as a third resin layer disposed on the second resin layer. .

The first resin layer 31 is disposed on the substrate 11 and seals the light emitting device 21. The first resin layer 31 may be thicker than the thickness of the light emitting device 21. The first resin layer 31 may be made of a transparent resin material, such as UV (Ultra violet) resin, silicone, or epoxy. The first resin layer 31 may be a diffusion layer or a molding layer without a diffusion agent.

The thickness (b) of the first resin layer 31 may be thicker than the thickness of the substrate 11. The thickness (b) of the first resin layer 31 may be at least 5 times thicker than the thickness of the substrate 11, for example, in the range of 5 to 9 times. By being disposed with the above thickness, the first resin layer 31 can seal the light emitting device 21 on the substrate 11, prevent moisture from penetrating, and support the substrate 11. The first resin layer 31 and the substrate 11 may be flexible plates. The thickness (b) of the first resin layer 31 may be 2.7 mm or less, for example, in the range of 2 mm to 2.7 mm. If the thickness (b) of the first resin layer 31 is smaller than the above range, the gap between the light emitting element 21 and the first diffusion layer 41 may be reduced or the thickness of the layer for diffusion may be thickened, If it is larger than the range, the module thickness may increase or the luminous intensity may decrease.

The first resin layer 31 is disposed between the substrate 11 and the first diffusion layer 41, and guides the light emitted from the light emitting device 21 to be emitted to the first diffusion layer 41. The first resin layer 31 may be a transparent material layer to which no impurities are added. Since the first resin layer is free of impurities, light can pass through the first resin layer in a straight line.

The light emitted from the light emitting device 21 is emitted through the light emitting surface (S1) and the side (S2), and the light emitted through the light emitting surface (S1) and the side (S2) is emitted through the first resin layer ( 31). Light emitted through the side S2 or reflected within the first and second diffusion layers 41 and 51 may be re-reflected from the upper surface of the substrate 11. For example, the light emitting device 21 may emit blue light in the range of 420 nm to 470 nm.

The first diffusion layer 41 may be in contact with the first resin layer 31. The first diffusion layer 41 may be formed of a resin material containing a diffusion agent after the first resin layer 31 is cured and then cured. Here, the diffusion agent may be added in the range of 1.5 wt% to 2.5 wt% based on the amount of the first diffusion layer 41 during the process. The first diffusion layer 41 may be made of a transparent resin material, such as UV (Ultra violet) resin, epoxy, or silicone. The refractive index of the first diffusion layer 41 may be 1.8 or less, for example, in the range of 1.1 to 1.8 or 1.4 to 1.6, and may be lower than the refractive index of the diffusion agent.

For example, the UV resin may use a resin (oligomer type) whose main material is urethane acrylate oligomer. For example, urethane acrylate oligomer, a synthetic oligomer, can be used. The main material may further include monomers mixed with low boiling point diluted reactive monomers such as IBOA (isobornyl acrylate), HBA (Hydroxybutyl Acrylate), and HEMA (Hydroxy Metaethyl Acrylate), and a photoinitiator (such as 1-hydroxycyclohexyl) as an additive. Phenyl-ketone, Diphenyl), Diphwnyl (2,4,6-trimethylbenzoyl phosphine oxide), etc. or antioxidants can be mixed. The UV resin may be formed of a composition containing 10 to 21% of oligomers, 30 to 63% of monomers, and 1.5 to 6% of additives. In this case, the monomer may be composed of a mixture of 10 to 21% isobornyl acrylate (IBOA), 10 to 21% hydroxybutyl acrylate (HBA), and 10 to 21% hydroxy metaethyl acrylate (HEMA). The additive can perform the function of initiating photoreactivity by adding 1-5% of a photoinitiator, and can be formed into a mixture that can improve the yellowing phenomenon by adding 0.5-1% of an antioxidant. The formation of the resin layer using the above-described composition allows the refractive index and thickness to be adjusted by forming a layer with a resin such as UV resin instead of a light guide plate, and at the same time, using the above-described composition, adhesion characteristics, reliability, and mass production speed are all achieved. It can be done to satisfy.

The first resin layer 31 and the first diffusion layer 41 may be made of the same resin material. When the first resin layer 31 and the first diffusion layer 41 are made of the same resin material, the first resin layer 31 and the first diffusion layer 41 are in close contact with each other and the first resin layer 31 and the first diffusion layer 41 are made of the same resin material. Light loss at the interface between the first diffusion layers 41 can be reduced. The refractive index of this resin material may be 1.8 or less, for example, in the range of 1.1 to 1.8 or 1.4 to 1.6, and may be lower than the refractive index of the diffusion agent.

The first diffusion layer 41 may be formed to have a thickness (c, b>c) that is thinner than the thickness (b) of the first resin layer 31. The thickness (c) of the first diffusion layer 41 may be 80% or less of the thickness (b) of the first resin layer 31, for example, in the range of 40% to 80%. Since the first diffusion layer 41 is provided with a thin thickness, the ductility characteristics of the lighting module can be secured.

The first diffusion layer 41 may include a dispersing agent (beads or dispersing agent) therein. The first diffusion layer 41 may be disposed between the first resin layer 31 and the second diffusion layer 51. The diffuser has a refractive index in the range of 1.4 to 2 at the emission wavelength, and its size may be in the range of 4 ㎛ to 6 ㎛. The dispersing agent may have a spherical shape, but is not limited thereto.

The diffusion agent of the first diffusion layer 41 can diffuse light incident through the first resin layer 31. Accordingly, the occurrence of hot spots caused by light emitted through the first diffusion layer 41 can be reduced. The diffuser may have a size smaller than the wavelength of light emitted from the light emitting device 21. Since this diffuser is disposed with a size smaller than the wavelength, the light diffusion effect can be improved.

The content of the diffusion agent in the first diffusion layer 41 may be 5 wt% or less, for example, in the range of 2 wt% to 5 wt%. If the content of the diffusion agent is less than the above range, there is a limit to lowering the hot spot, and if it is greater than the above range, light transmittance may be reduced. Accordingly, the diffuser can be disposed in the above amount in the first diffusion layer 41 to diffuse light and reduce hot spots without reducing light transmittance.

The second diffusion layer 51 may be made of a resin material different from that of the first resin layer 31 and the first diffusion layer 41. The second diffusion layer 51 may be a transparent layer and may contain a phosphor therein. The second diffusion layer 51 may include at least one type of phosphor, such as red phosphor, amber phosphor, or yellow phosphor. By adding a phosphor into the second diffusion layer 51, the wavelength conversion efficiency of the diffused light can be increased. The second diffusion layer 51 may include a material such as silicon or epoxy. The second diffusion layer 51 may have a refractive index in the range of 1.45 to 1.6. The refractive index of the second diffusion layer 51 may be equal to or higher than the refractive index of the diffusion agent. The second diffusion layer 51 may have a higher refractive index than the first resin layer 31 and the first diffusion layer 41. If the refractive index of the second diffusion layer 51 is lower than the above range, the uniformity of light may be lowered, and if it is higher than the above range, the light transmittance may be reduced. Accordingly, the refractive index of the second diffusion layer 51 is within the above range, so that light transmittance and light uniformity can be adjusted. The second diffusion layer 51 may be defined as a layer that has a phosphor inside and diffuses light.

The content of the phosphor may be added in the same amount as the resin material forming the second diffusion layer 51. The phosphor may be added at a ratio of 40% to 60% compared to the resin material of the second diffusion layer 51. For example, the third phosphor and the resin material of the second diffusion layer 51 may be added at the same ratio, for example, mixed at 50% to 50%. As another example, the phosphor may range from 40 wt% to 60 wt%, and the resin material of the second diffusion layer 51 may range from 40 wt% to 60 wt%. The content of the phosphor may differ from the resin material of the second diffusion layer 51 by 20% or less or 10% or less. Additionally, it can be seen that as the density of diffusers (beads) added to the first diffusion layer increases, the amount of phosphor required for color coordinates Cx and Cy decreases. Accordingly, it can be seen that the amount of fluorescent substance is adjusted depending on the degree of light diffusion by the diffusion agent.

In the embodiment, the content of the phosphor in the second diffusion layer 51 is 40 wt% or more or in the range of 40 wt% to 60 wt%, so that the color on the surface of the second diffusion layer 51 is provided as the color of the phosphor. It can improve the diffusion and wavelength conversion efficiency of light. In addition, transmission of the wavelength of light emitted from the light emitting device 21, for example, blue light, through the second diffusion layer 51 can be reduced. Additionally, light extracted through the second diffusion layer 51 may be provided as a planar light source based on the wavelength of the phosphor.

For example, the second diffusion layer 51 may be provided in the form of a film by adding a phosphor to a resin material and then curing it. This second diffusion layer 51 may be formed directly on the first diffusion layer 41, or may be formed separately and then adhered. The second diffusion layer 51 manufactured in the form of a film may be adhered to the upper surface of the first diffusion layer 41. An adhesive may be disposed between the second diffusion layer 51 and the first diffusion layer 41.

The adhesive is a transparent material and may be an adhesive such as UV adhesive, silicone, or epoxy. Since the second diffusion layer 51 is provided in the form of a film, internal phosphor distribution can be uniformly provided and surface color sensibility can be provided at a certain level or higher.

By using a resin film as the second diffusion layer 51, it is possible to provide a module with higher ductility than when a polyester (PET) film is used. The second diffusion layer 51 may be a protective film with a phosphor or a release film with a phosphor. The second diffusion layer 51 may be provided as a film that can be attached or separated from the first diffusion layer 41.

The second diffusion layer 51 may have a thickness (d, d<c<b) that is smaller than the thickness (c) of the first diffusion layer 41, for example, in the range of 0.3 mm to 0.5 mm. The thickness (d) of the second diffusion layer 51 may be 25% or less of the thickness (c) of the first diffusion layer 41, for example, in the range of 16% to 25%. The thickness (d) of the second diffusion layer 51 may be 18% or less of the thickness (b) of the first resin layer 31, for example, in the range of 14% to 18%. If the thickness (d) of the second diffusion layer 51 is thicker than the above range, light extraction efficiency may decrease or the module thickness may increase, and if it is smaller than the above range, it may be difficult to suppress hot spots or wavelength conversion efficiency may be reduced. You can. In addition, the second diffusion layer 51 is a layer for wavelength conversion and external protection, and if it is thicker than the above range, the ductility characteristics of the module may be reduced and the degree of design freedom may be reduced.

The phosphor converts the wavelength of light emitted from the light emitting device 21. If the phosphor is a red phosphor, it is converted into red light. Most of the light emitted from the light emitting device 21 can be converted to wavelength. Light is uniformly diffused through a diffusion agent added to the first diffusion layer 41, and the diffused light can be wavelength converted by a phosphor added to the second diffusion layer 51. As another example, the phosphor may include at least one or two of amber phosphor, yellow phosphor, green phosphor, red phosphor, or blue phosphor.

Since the second diffusion layer 51 includes a phosphor, the exterior color can be displayed as the color of the phosphor. For example, when the phosphor is red, the surface color of the second diffusion layer 51 may appear red. The surface of the second diffusion layer 51 or the surface of the lighting module may be provided as a red image when the light-emitting device 21 is turned off, and a red image with a predetermined luminance when the light-emitting device 21 is turned on. The light can be diffused to provide a red image of a planar light source. Depending on whether the light emitting device 21 is turned on or off, the color coordinates of the surface color may have different values within the color of the phosphor.

The lighting module 100 according to the embodiment has a thickness of 5.5 mm or less, can emit a surface light source through the upper surface, and can have flexible characteristics. The lighting module 100 may emit light through a side surface.

The embodiment may provide a flexible lighting module having a plurality of resin layers, for example, a first resin layer 31 and diffusion layers 41 and 51, on a substrate 11. The lighting module of the embodiment spreads the light by guiding it in the radial or direct direction within the first resin layer 31, and diffuses it through the diffusion agent of the first diffusion layer 41, and the second diffusion layer 51 ) can be converted to wavelength and diffused through the phosphor. Accordingly, the light to be finally emitted through the lighting module is emitted as a surface light source. In addition, the plurality of light-emitting devices 21 in the lighting module 100 are flipped to emit light from five sides on the flexible circuit board, and the light emitted through the top and side surfaces of the light-emitting devices 21 is transmitted through the first and second diffusion layers. It may be emitted in the (41,51) direction and the side direction of the first resin layer (31). The light emitted from the light emitting element (210) may emit light in the upper surface and all side directions of the lighting module. The lighting module may be a vehicle lamp, a display device having a micro LED, or various types of lighting. Can be applied to devices.

As the above-mentioned lighting module provides a surface light source, an additional inner lens can be removed, and the first resin layer 31 seals the light-emitting devices 21, thereby allowing air to be released on the light-emitting device 21. The gap or structure for inserting the light emitting device 21 can be removed.

When viewed from the side, the lighting module 100 may have a flat plate shape, a convex curved shape, a concave curved shape, or a convex/concave shape. When viewed from the top, the lighting module may have a bar shape such as a stripe, a polygonal shape, a circular shape, an oval shape, a shape with a convex side surface, or a shape with a concave side surface.

Hereinafter, as an example in which the diffusion layer in the lighting module is modified or changed to another structure as shown in FIGS. 3 to 13, the same configuration as the above refers to the above description, and can be selectively applied to this modified example or other examples.

Figure 3 is a first modified example of the lighting module of Figure 1.

Referring to FIG. 3, the lighting module may have a plurality of light-emitting devices 21 disposed on a substrate 11, and a first resin layer 32 may be disposed on the plurality of light-emitting devices 21. The lighting module is a configuration in which two layers are removed from the lighting module described in FIG. 1.

The first resin layer 32 may include a phosphor and a diffusion agent. The phosphor may include, for example, at least one of red phosphor, amber phosphor, yellow phosphor, green phosphor, or white phosphor. The first resin layer 32 may be defined as a diffusion layer or a resin layer. The first resin layer 32 may be formed of the same material as the first resin layer shown in FIG. 1.

The content of the dispersing agent added to the first resin layer 32 may be 5 wt% or less, for example, in the range of 2 wt% to 5 wt%. If the content of the diffusion agent is less than the above range, there is a limit to lowering the hot spot, and if it is greater than the above range, light transmittance may be reduced. Accordingly, by disposing the diffuser in the above content in the first resin layer 32, it can diffuse light and reduce hot spots without reducing light transmittance.

The phosphor added into the first resin layer 32 may have a content difference from the resin material of the first resin layer 32 of 25% or less or 15% or less. The content of phosphor may be added to the first resin layer 32 in an amount of 35 wt% or more or in the range of 35 wt% to 45 wt%. The content of phosphor in the first resin layer 32 may be added at least 5 times higher than the content of the diffusion agent. Accordingly, the color on the surface of the first resin layer 32 can be provided as the color of the phosphor, and light diffusion and wavelength conversion efficiency can be improved. In addition, transmission of the wavelength of light emitted from the light emitting device 21, such as blue light, through the first resin layer 32 can be reduced. Additionally, light extracted through the first resin layer 32 may be provided as a surface light source based on the wavelength of the phosphor. The thickness of the first resin layer 32 may be 3 mm or more, for example, in the range of 3 mm to 5 mm. By providing the first resin layer 32 with a thickness within the above range, it is possible to diffuse light and convert its wavelength. These lighting modules can be provided as area light sources. The thickness of the first resin layer 32 may be equal to or smaller than the gap between the light emitting devices 21.

The lighting module in FIG. 3 has a structure in which the first and second diffusion layers in FIG. 1 are removed, and can provide a wavelength-converted surface light source using the thickness of the first resin layer 32. The first resin layer 32 may include the functions of the first and second diffusion layers disclosed in FIG. 1. The first resin layer 32 may be molded on the light emitting device 21 and hardened. The lighting module according to the embodiment has a thickness of 5.5 mm or less, can emit a planar light source through the upper surface, and can have flexible characteristics. The lighting module may emit light through a side surface.

Figure 4 is a second modified example of the lighting module of Figure 1.

Referring to FIG. 4, the lighting module has a plurality of light-emitting devices 21 disposed on a substrate 11, and the plurality of light-emitting devices 21 are molded with a first resin layer 33, and the first resin A first diffusion layer 55 may be disposed on layer 33. The lighting module is a configuration in which one layer is removed from the lighting module illustrated in FIG. 1 .

The first resin layer 33 can mold the light emitting device 21. The first resin layer 33 may be formed of a resin material containing the diffusion agent and then cured. Here, the dispersing agent may be added in the range of 1.5 wt% to 2.5 wt% based on the amount of the first resin layer 33 during the process. The first resin layer 33 may be made of a transparent resin material, such as UV (Ultra violet) resin, epoxy, or silicone. The first diffusion layer 55 and the first resin layer 33 may be made of the same resin material. By removing some of the layers in FIG. 1, the lighting module can be provided with a thin module thickness, and hot spots can be reduced by diffusing light through the first resin layer 33. The first resin layer 33 may include the function of a layer having a diffusion agent in FIG. 1.

The first resin layer 33 is formed to have a thickness of 3 mm or more, for example, in the range of 3 mm to 4 mm, to prevent a decrease in light diffusion. The first resin layer 33 may contain a dispersing agent (beads or dispersing agent) therein. The first resin layer 33 may be disposed between the substrate 11 and the first diffusion layer 55. This first resin layer 33 can diffuse the light emitted through the light emitting device 21. Accordingly, the occurrence of hot spots caused by light emitted through the first resin layer 33 can be reduced. The diffuser may have a size smaller than the wavelength of light emitted from the light emitting device 21. Since this diffuser is disposed with a size smaller than the wavelength, the light diffusion effect can be improved.

The content of the dispersant in the first resin layer 33 may be 5 wt% or less, for example, in the range of 2 wt% to 5 wt%. If the content of the diffusion agent is less than the above range, there is a limit to lowering the hot spot, and if it is greater than the above range, light transmittance may be reduced. Accordingly, by disposing the diffuser in the above content in the first resin layer 33, it can diffuse light and reduce hot spots without reducing light transmittance.

The first diffusion layer 55 may include a phosphor, and the phosphor may include, for example, at least one of red phosphor, amber phosphor, yellow phosphor, green phosphor, or white phosphor. The phosphor added into the first diffusion layer 55 may have a content difference from the resin material of the first diffusion layer 55 of 20% or less or 10% or less. The content of phosphor may be added to the first diffusion layer 55 in an amount of 40 wt% or more or in the range of 40 wt to 60 wt%. Accordingly, the color on the surface of the first diffusion layer 55 can be provided as the color of the phosphor, and light diffusion and wavelength conversion efficiency can be improved. In addition, transmission of the wavelength of light emitted from the light emitting device 21, for example, blue light, through the first diffusion layer 55 can be reduced. Additionally, light extracted through the first diffusion layer 55 may be provided as a planar light source based on the wavelength of the phosphor. The thickness of the first diffusion layer 55 may be 0.3 mm or more, for example, in the range of 0.3 mm to 0.7 mm. By providing the first diffusion layer 55 with a thickness within the above range, it is possible to diffuse light and convert its wavelength. These lighting modules can be provided as area light sources. The lighting module according to the embodiment has a thickness of 5.5 mm or less, can emit a planar light source through the upper surface, and can have flexible characteristics. The lighting module may emit light through a side surface.

Figure 5 is another example of Figure 4, in which the lighting module has a first diffusion layer 55 disposed on a first resin layer 33 covering the light emitting device 21 disclosed in the embodiment, and the first diffusion layer 55 may include a side portion 55a covering the side surface of the first resin layer 33. The side portion 55a of the first diffusion layer 55 is disposed along the side of the first resin layer 33 and covers the side of the first resin layer 33. The side portion 55a may extend from the upper edge of the first resin layer 33 toward the upper surface of the substrate 11. The side surface 55a of the first diffusion layer 55 may be in contact with the upper surface of the substrate 11. By contacting the side surface 55a of the first diffusion layer 55 along the outer circumference of the substrate 11, moisture infiltration can be prevented and the side surface of the lighting module can be protected. The phosphor disclosed above may be added to the side portion 55a of the first diffusion layer 55, but there is no limitation thereto. The side portion 55a of the first diffusion layer 55 may be formed on one side, at least two sides, or all sides of the first resin layer 33, or may leave at least one side open. Some light may be extracted through the open area.

Figure 6 is a third modified example of the lighting module of Figure 1.

Referring to FIG. 6, the lighting module has a plurality of light-emitting devices 21 disposed on a substrate 11, the plurality of light-emitting devices 21 are molded with a first resin layer 33, and the first resin layer 33 is molded. A first diffusion layer 52 may be disposed on layer 33 . The lighting module is a configuration in which one layer is removed from the lighting module illustrated in FIG. 1 .

The first resin layer 33 can mold the light emitting device 21. The first resin layer 33 may be formed of a resin material containing the diffusion agent and then cured. Here, the dispersing agent may be added in the range of 1.5 wt% to 2.5 wt% based on the amount of the first resin layer 33 during the process. The first resin layer 33 may be made of a transparent resin material, such as UV (Ultra violet) resin, epoxy, or silicone. By removing one layer from the module of FIG. 1, the lighting module can provide a thin module thickness and can reduce hot spots by diffusing light through the first resin layer 33.

The first resin layer 33 is formed to have a thickness of 3 mm or more, for example, in the range of 3 mm to 4 mm, to prevent a decrease in light diffusion. The first resin layer 33 may include a dispersing agent (beads or dispersing agent) therein. The first resin layer 33 may be disposed between the substrate 11 and the first diffusion layer 52. This first resin layer 33 can diffuse the light emitted through the light emitting device 21. Accordingly, the occurrence of hot spots caused by light emitted through the first resin layer 33 can be reduced. The diffuser may have a size smaller than the wavelength of light emitted from the light emitting device 21. Since this diffuser is disposed with a size smaller than the wavelength, the light diffusion effect can be improved.

The content of the dispersant in the first resin layer 33 may be 5 wt% or less, for example, in the range of 2 wt% to 5 wt%. If the content of the diffusion agent is less than the above range, there is a limit to lowering the hot spot, and if it is greater than the above range, light transmittance may be reduced. Accordingly, by disposing the diffuser in the above content in the first resin layer 33, it can diffuse light and reduce hot spots without reducing light transmittance.

The first diffusion layer 52 may include a phosphor and a diffusion agent, and the phosphor may include, for example, at least one of red phosphor, amber phosphor, yellow phosphor, green phosphor, or white phosphor. The diffusion agent may include at least one of PMMA (Poly Methyl Meth Acrylate) series, TiO ₂ , SiO ₂ , Al ₂ O ₃ , and silicon series. The diffuser has a refractive index in the range of 1.4 to 2 at the emission wavelength, and its size may be in the range of 4 ㎛ to 6 ㎛. The dispersing agent may have a spherical shape, but is not limited thereto. The content of the dispersant in the first resin layer 33 may be 5 wt% or less, for example, in the range of 2 wt% to 5 wt%. If the content of the diffusion agent is less than the above range, there is a limit to lowering the hot spot, and if it is greater than the above range, light transmittance may be reduced. Accordingly, by disposing the diffuser in the above content in the first resin layer 33, it can diffuse light and reduce hot spots without reducing light transmittance.

The content difference between the phosphor added in the first diffusion layer 52 and the resin material of the first diffusion layer 52 may be 35% or less or 25% or less. The content of phosphor may be added to the first diffusion layer 52 in an amount of 35 wt% or more or in the range of 35 wt% to 45 wt%. The content of phosphor in the first diffusion layer 52 may be added at least 5 times higher than the content of the diffusion agent. Accordingly, the color on the surface of the first diffusion layer 52 can be provided as the color of the phosphor, and light diffusion and wavelength conversion efficiency can be improved. In addition, transmission of the wavelength of light emitted from the light emitting device 21, for example, blue light, through the first diffusion layer 52 can be reduced. Additionally, light extracted through the first diffusion layer 52 may be provided as a planar light source based on the wavelength of the phosphor. The thickness of the first diffusion layer 52 may be 0.3 mm or more, for example, in the range of 0.3 mm to 0.7 mm. By providing the first diffusion layer 52 with a thickness within the above range, light can be diffused and its wavelength converted. These lighting modules can be provided as area light sources. The lighting module can be provided as a thin, flexible surface light source module.

Figure 7 is another example of the lighting module of Figure 6.

Referring to FIG. 7, the lighting module has a first diffusion layer 52 disposed on a first resin layer 33 covering the light emitting device 21 disclosed in the embodiment, and the first diffusion layer 52 is the first diffusion layer 52. It may include a side portion (52a) covering the side surface of the resin layer (33). The side surface portion 52a of the first diffusion layer 52 covers the side surface of the first resin layer 33 and may extend in the direction of the upper surface of the substrate 11. The side surface 52a of the first diffusion layer 52 may be in contact with the upper surface of the substrate 11. By contacting the side surface 52a of the first diffusion layer 52 along the outer circumference of the substrate 11, moisture infiltration can be prevented and the side surface of the lighting module can be protected. The phosphor and diffusion agent disclosed above may be added to the side surface of the first diffusion layer 52, but there is no limitation thereto. The side portion 52a of the first diffusion layer 52 may be formed on one side, at least two sides, or all sides of the first resin layer 33, or may leave at least one side open. Some light may be extracted through the open area.

Figure 8 is a fourth modified example of the lighting module of Figure 1. The fourth modified example is an example modified from the structure of FIG. 1, and will be described focusing on examples that are different from the description of FIG. 1.

Referring to FIG. 8, the lighting module includes a substrate 11, a plurality of light-emitting devices 21 on the substrate 11, a first resin layer 31 covering the light-emitting devices 21, and the first resin layer. (31) It may include a first diffusion layer 41 on the first diffusion layer 41 and a second diffusion layer 53 on the first diffusion layer 41. For the configuration of the first and second diffusion layers, refer to the description of FIG. 1. The second diffusion layer 53 may be defined as a second resin layer, a diffusion layer, or a phosphor layer.

The second diffusion layer 53 may include a phosphor and a diffusion agent, and the phosphor may include, for example, at least one of red phosphor, amber phosphor, yellow phosphor, green phosphor, or white phosphor. The diffusion agent may include at least one of PMMA (Poly Methyl Meth Acrylate) series, TiO ₂ , SiO ₂ , Al ₂ O ₃ , and silicon series. The diffuser has a refractive index in the range of 1.4 to 2 at the emission wavelength, and its size may be in the range of 4 ㎛ to 6 ㎛. The dispersing agent may have a spherical shape, but is not limited thereto. The content of the diffusion agent in the first diffusion layer 41 may be 5 wt% or less, for example, in the range of 2 wt% to 5 wt%. If the content of the diffusion agent is less than the above range, there is a limit to lowering the hot spot, and if it is greater than the above range, light transmittance may be reduced. Accordingly, the diffuser can be disposed in the above amount in the first diffusion layer 41 to diffuse light and reduce hot spots without reducing light transmittance.

The content difference between the phosphor added in the second diffusion layer 53 and the resin material of the second diffusion layer 53 may be 35% or less or 25% or less. The content of phosphor may be added to the second diffusion layer 53 in an amount of 35 wt% or more or in the range of 35 wt% to 45 wt%. Accordingly, the color on the surface of the second diffusion layer 53 can be provided as the color of the phosphor, and light diffusion and wavelength conversion efficiency can be improved. In addition, transmission of the wavelength of light emitted from the light emitting device 21, for example, blue light, through the second diffusion layer 53 can be reduced. Additionally, light extracted through the second diffusion layer 53 may be provided as a planar light source based on the wavelength of the phosphor. The thickness of the second diffusion layer 53 may be 0.3 mm or more, for example, in the range of 0.3 mm to 0.5 mm. By providing the second diffusion layer 53 with a thickness within the above range, light can be diffused and its wavelength converted. These lighting modules can be provided as area light sources.

Figure 9 is another example of the lighting module of Figure 8. In the lighting module of Figure 8, the first and second diffusion layers are the same, and the second diffusion layer 52 further includes a side portion 52a. The second diffusion layer 52 may include the first resin layer 31 and a side surface portion 52a covering the side surfaces of the first diffusion layer 41. The side portion 52a of the second diffusion layer 52 covers the side surfaces of the first resin layer 31 and the first diffusion layer 41 and may extend in the direction of the upper surface of the substrate 11. The side surface 52a of the second diffusion layer 52 may be in contact with the upper surface of the substrate 11. By contacting the side surface 52a of the second diffusion layer 52 along the outer circumference of the substrate 11, moisture infiltration can be prevented and the side surface of the lighting module can be protected. The phosphor and diffusion agent disclosed above may be added to the side portion 52a of the second diffusion layer 52. The side portion 52a of the second diffusion layer 52 may be formed on one side, at least two sides, or all sides of the first resin layer 31 and the first diffusion layer 41, or may have at least one side open. there is.

Figure 10 is another example of the lighting module of Figure 1. In the lighting module of Figure 1, the first and second diffusion layers are the same, and the second diffusion layer 51 further includes a side portion 51a. The second diffusion layer 51 may include the first resin layer 31 and a side surface portion 51a covering the side surfaces of the first diffusion layer 41. The side surface of the second diffusion layer 51 covers the side surfaces of the first resin layer 31 and the first diffusion layer 41 and may extend in the direction of the upper surface of the substrate 11. The side surface 51a of the second diffusion layer 51 may be in contact with the upper surface of the substrate 11. By contacting the side surface 51a of the second diffusion layer 51 along the outer circumference of the substrate 11, moisture infiltration can be prevented and the side surface of the lighting module can be protected. The phosphor disclosed above may be added to the side surface 51a of the second diffusion layer 51, but there is no limitation thereto. The side portion 51a of the second diffusion layer 51 may be formed on one side, at least two sides, or all sides of the first and second diffusion layers, or may have at least one side open.

Figure 11 is a fifth modified example of the lighting module of Figure 1. The fifth modified example is an example modified from the structure of FIG. 1, and will be explained focusing on examples that are different from the description of FIG. 1.

Referring to FIG. 11, the lighting module includes a substrate 11, a plurality of light-emitting devices 21 on the substrate 11, a first resin layer 31 covering the light-emitting devices 21, and the first resin. A first diffusion layer 54 may be included on the layer 31 . The configuration of the first resin layer 31 refers to the description of FIG. 1, and is a configuration in which one layer is removed from the lighting module of FIG. 1.

The first diffusion layer 54 may include a phosphor and a diffusion agent, and the phosphor may include, for example, at least one of a red phosphor, an amber phosphor, a yellow phosphor, a green phosphor, or a white phosphor. You can. The diffusion agent may include at least one of PMMA (Poly Methyl Meth Acrylate) series, TiO ₂ , SiO ₂ , Al ₂ O ₃ , and silicon series. The diffuser has a refractive index in the range of 1.4 to 2 at the emission wavelength, and its size may be in the range of 4 ㎛ to 6 ㎛. The dispersing agent may have a spherical shape, but is not limited thereto. The content of the diffusion agent in the first diffusion layer 54 may be 5 wt% or less, for example, in the range of 2 wt% to 5 wt%. If the content of the diffusion agent is less than the above range, there is a limit to lowering the hot spot, and if it is greater than the above range, light transmittance may be reduced. Accordingly, the diffuser is disposed in the above amount in the first diffusion layer 54, thereby diffusing light and reducing hot spots without reducing light transmittance.

The content difference between the phosphor added in the first diffusion layer 54 and the resin material of the first diffusion layer 54 may be 35% or less or 25% or less. The content of phosphor may be added to the first diffusion layer 54 in an amount of 35 wt% or more or in the range of 35 wt% to 45 wt%. The content of phosphor in the first diffusion layer 54 may be 5 times higher than that of the diffusion agent. Accordingly, the color on the surface of the first diffusion layer 54 can be provided as the color of the phosphor, and light diffusion and wavelength conversion efficiency can be improved. In addition, transmission of the wavelength of light emitted from the light emitting device 21, for example, blue light, through the first diffusion layer 54 can be reduced. Additionally, light extracted through the first diffusion layer 54 may be provided as a planar light source based on the wavelength of the phosphor. The thickness of the first diffusion layer 54 may be 1.7 mm or more, for example, in the range of 1.7 mm to 2.2 mm. By providing the first diffusion layer 54 with a thickness within the above range, light can be diffused and its wavelength converted. These lighting modules can be provided as area light sources. The lighting module can be provided as a thin, flexible surface light source module. The first diffusion layer 54 may be defined as a resin layer, diffusion layer, or phosphor layer.

Figure 12 is another example of the lighting module of Figure 11. In the lighting module of FIG. 11, the first resin layer 31 is the same and further includes a side portion 54a of the first diffusion layer 54. The first diffusion layer 54 may include a side portion 54a covering the side surface of the first resin layer 31. The side surface portion 54a of the first diffusion layer 54 covers the side surface of the first resin layer 31 and may extend in the direction of the upper surface of the substrate 11. The side surface 54a of the first diffusion layer 54 may be in contact with the upper surface of the substrate 11. By contacting the side portion 54a of the first diffusion layer 54 along the outer circumference of the substrate 11, moisture infiltration can be prevented and the side surface of the lighting module can be protected. The phosphor disclosed above may be added to the side surface 54a of the first diffusion layer 54, but there is no limitation thereto. The side portion 54a of the first diffusion layer 54 may be formed on one side, at least two sides, or all sides of the first resin layer 31, or may leave at least one side open.

Figure 13 is a sixth modified example of the lighting module of Figure 1. Figure 13 is an example of variation between the first and second diffusion layers in the lighting module of Figure 1.

Referring to FIG. 13, the lighting module includes a substrate 11, a light emitting element 21 disposed on the substrate 11, and a first resin layer 31 on the substrate 11. (31) on the adhesive layer 45 and the light blocking portion 46, on the adhesive layer 45 and the light blocking portion 46, a first diffusion layer 41, and on the first diffusion layer 41, a second diffusion layer ( 51) may be included. In this lighting module, the first resin layer 31 and the first and second diffusion layers 41 and 51 are the same as those in FIG. 1, and redundant description will be omitted.

The adhesive layer 45 may be adhered between the first resin layer 31 and the first diffusion layer 41. The adhesive layer 45 may be made of the same material as that of the first resin layer 31 and the first diffusion layer 41 or may be made of a different material. The adhesive layer 45 may be made of a resin material such as silicone or epoxy. The adhesive layer 45 may be disposed around the light blocking part 46 or may extend to the lower surface of the light blocking part 46. The light blocking portion 46 may be disposed on the lower surface of the first diffusion layer 41 in an area corresponding to the light emitting device 21. The light blocking portion 46 may be 50% or more of the top surface area of the light emitting device 21, for example, 50% to 120% of the area. The light blocking portion 46 may be formed through an area printed with a white material. The light blocking portion 46 can be printed using a reflective ink containing any one of, for example, TiO ₂ , Al ₂ O ₃ CaCO ₃ , BaSO ₄ , and Silicon. The light blocking portion 46 reflects light emitted through the light emitting surface of the light emitting device 21, thereby reducing the occurrence of hot spots caused by the luminance of light on the light emitting device 21. The light blocking part 46 can print a light blocking pattern using light blocking ink. The light blocking portion 46 may be formed by printing on the lower surface of the first diffusion layer 41. The light blocking portion 46 does not block 100% of the incident light and its transmittance may be lower than its reflectance, so it can perform the function of blocking and diffusing light. The light blocking portion 46 may be formed of a single layer or multiple layers, and may have the same pattern shape or different pattern shapes.

The second diffusion layer 51 may include the side portion disclosed above, and may cover the first resin layer 31 and the side surfaces of the first diffusion layer 41. As another example, the side portion may be formed to be extended by the first diffusion layer 31. As another example, the side surface of the second diffusion layer 51 has been described as being in contact with the upper surface of the substrate 11, but the side surface of the second diffusion layer 51 is not connected to the upper surface of any one of the first resin layer 31 and the first diffusion layer 41. may be contacted. As another example, the side surface of the second diffusion layer 51 may be in contact with at least one of the first resin layer 31 and the upper surface of the first diffusion layer 41 and the upper surface of the substrate 11. In this case, the outer periphery of the first resin layer 31 and the first diffusion layer 41 may be formed in the form of a concave-convex pattern.

The lighting module according to the embodiment may have the best wavelength conversion efficiency when the diffusion layer containing the phosphor is disposed at the farthest position from the light emitting device. These first to second diffusion layers may be stacked in the same order as above or in a different order. For example, the first diffusion layer containing the diffusion agent may be disposed adjacent to the light emitting device or lower than the first resin layer. For example, the second diffusion layer having the phosphor may be disposed adjacent to the light emitting device or lower than the first resin layer, but is not limited thereto. The lighting module can be provided as a thin, flexible surface light source module.

The top surface area of the substrate 11 disclosed in the first embodiment may be equal to or larger than the bottom surface area of the first resin layer disclosed above. The length of the substrate 11 in the first and second directions (X, Y) may be greater than the length of the first and second directions of the first resin layer. The outer perimeter of the substrate 11 may extend outward from the side of the first resin layer. The outer perimeter of the substrate 11 may extend further outward than the side surfaces of the first and second diffusion layers. The length of the substrate 11 in the first and second directions may be 10% or less, or may protrude in the range of 1% to 10%, from at least one of the side surfaces of the first resin layer and the side surfaces of the first and second diffusion layers. there is.

Embodiments of the invention can solve the problem that the material of the diffusion plate, such as the light guide plate, is not flexible and is therefore unsuitable for a curved structure. Additionally, the number of light emitting elements can be reduced for a surface light source.

The embodiment may provide a flexible lighting module having a plurality of resin layers, for example, a first resin layer 31 and diffusion layers 41 and 51, on a substrate 11. A flexible lighting module having such a laminated structure can be provided. The lighting module of the embodiment spreads the light by guiding it in the radial or direct direction within the first resin layer 31, and diffuses it through the diffusion agent of the first diffusion layer 41, and the second diffusion layer 51 ) can be converted to wavelength and diffused through the phosphor.

Accordingly, the light to be finally emitted through the lighting module is emitted as a surface light source. In addition, the plurality of light-emitting devices 21 in the lighting module 100 are flipped to emit light from five sides on the flexible circuit board, and the light emitted through the top and side surfaces of the light-emitting devices 21 is transmitted through the first and second diffusion layers. It may be emitted in the (41,51) direction and the side direction of the first resin layer (31).

<Second Embodiment>

In describing the second embodiment, duplicate description of the same configuration as the first embodiment will be omitted, and the same configuration as the first embodiment will be referred to in the first embodiment. The lighting module according to the second embodiment may include a light emitting element and one or more resin layers on the circuit board. The resin layer may include, for example, one or more layers or two or more layers. The resin layer is at least two layers among a layer without impurities, a layer to which a phosphor is added, a layer with a diffusion agent, a layer to which ink particles are added, a layer to which a phosphor and a diffusion agent are added, and a layer to which a phosphor and ink particles are added. Alternatively, it may optionally include three or more layers. The impurities may include phosphors, diffusion agents, or ink particles. At least one of the plurality of resin layers may optionally include at least one of a diffusion agent, a phosphor, and ink particles. That is, the phosphor, diffusion agent, and ink particles may each be added to separate resin layers, or may be mixed together and placed in one resin layer. At least one or more of the phosphor, diffusion agent, and ink particles may be added to one resin layer. The layers provided with the phosphor and the diffusion agent may be arranged adjacent to each other or spaced apart from each other. When the phosphor and the layer on which the diffusion agent is disposed are separated from each other, the layer on which the phosphor is disposed may be disposed above the layer on which the diffusion agent is disposed. The phosphor and ink particles may be placed on the same layer or may be placed on different layers. The resin layer to which the INK particles are added may be disposed higher than the resin layer to which the phosphor is added.

Figure 14 is a side cross-sectional view of the lighting module according to the second embodiment.

Referring to FIG. 14, the lighting module 101 includes a substrate 11, a light emitting device 21 disposed on the substrate 11, and a first resin covering the light emitting device 21 on the substrate 11. It may include a layer (61). For the substrate 11 and the light emitting device 21, refer to the configuration disclosed in FIGS. 1 to 13.

The lighting module 101 may emit light emitted from the light emitting device 21 as a planar light source. The lighting module 101 may include a reflective member disposed on the upper surface of the substrate 11. The reflective member may reflect light traveling toward the upper surface of the substrate 11 to the first resin layer 61. The light emitting devices 21 may be disposed on the substrate 11 in plural numbers. The plurality of light emitting devices 21 disposed on the substrate 11 may be arranged as shown in FIG. 2 or may be arranged in N columns and M rows (N and M are integers of 1 or more). A connector may be provided on a portion of the upper or lower surface of the substrate 11 to supply power to the light emitting elements 21.

The light emitting device 21 is an LED chip that emits light on at least five sides, and may be disposed on the substrate 11 in the form of a flip chip. As another example, the light emitting device 21 may be implemented as a horizontal chip or a vertical chip. The light emitting device 21 is a light emitting diode (LED) chip and can emit at least one of blue, red, green, ultraviolet (UV), or infrared light. The light emitting device 21 may emit light, for example, at least one of blue, red, and green. The light emitting device 21 may be sealed on the surface with a transparent insulating layer or resin, but is not limited thereto. The light emitting device 21 may have a phosphor layer having a phosphor formed on its surface.

The light emitting device 21 may be disposed on the substrate 11 and sealed by the first resin layer 61. The plurality of light emitting devices 21 may be in contact with the first resin layer 61. The first resin layer 61 may be disposed on the side and top surfaces of the light emitting device 21.

The first resin layer 61 protects the light emitting devices 21 and may be in contact with the upper surface of the substrate 11. Light emitted from the light emitting device 21 may be emitted through the first resin layer 61. For example, the light emitting device 21 may emit blue light in the range of 420 nm to 470 nm.

The first resin layer 61 may be thicker than the thickness of the light emitting device 21. The first resin layer 61 may be made of a transparent resin material, such as UV (Ultra violet) resin, silicone, or epoxy.

The first resin layer 61 may include a phosphor. The first resin layer 61 may include phosphor and ink particles. The first resin layer 61 may include a phosphor, ink particles, and a diffusion agent. The first resin layer 61 may include at least one or two of phosphors, ink particles, and diffusion agents. The phosphor may include, for example, at least one of red phosphor, amber phosphor, yellow phosphor, green phosphor, or white phosphor. The diffusion agent may include at least one of PMMA (Poly Methyl Meth Acrylate) series, TiO ₂ , SiO ₂ , Al ₂ O ₃ , and silicon series. The diffuser has a refractive index in the range of 1.4 to 2 at the emission wavelength, and its size may be in the range of 1 ㎛ to 100 ㎛. The dispersing agent may have a spherical shape, but is not limited thereto. The light uniformity due to the diffusion agent is the light uniformity in the area where the light emitting elements 21 are connected to each other, and can be provided at 90% or more.

The ink particles may include at least one of metallic ink, UV ink, or curing ink. The size of the ink particles may be smaller than the size of the phosphor. The surface color of the ink particles may be any one of green, red, yellow, and blue. The types of ink include PVC (poly vinyl chloride) ink, PC (polycarbonate) ink, ABS (acrylonitrile butadiene styrene copolymer) ink, UV resin ink, epoxy ink, silicone ink, PP (polypropylene) ink, water-based ink, plastic ink, and PMMA. (poly methyl methacrylate) ink and PS (polystyrene) ink can be selectively applied. Here, the width or diameter of the ink particles may be 5㎛ or less or in the range of 0.05㎛ to 1㎛. At least one of the ink particles may be smaller than the wavelength of light.

The ink particles may include at least one of metallic ink, UV ink, or curing ink. The size of the ink particles may be smaller than the size of the phosphor. The surface color of the ink particles may be any one of green, red, yellow, and blue. The types of ink include PVC (poly vinyl chloride) ink, PC (polycarbonate) ink, ABS (acrylonitrile butadiene styrene copolymer) ink, UV resin ink, epoxy ink, silicone ink, PP (polypropylene) ink, water-based ink, plastic ink, and PMMA. (poly methyl methacrylate) ink and PS (polystyrene) ink can be selectively applied. Here, the width or diameter of the ink particles may be 5㎛ or less, for example, in the range of 0.05㎛ to 1㎛. At least one of the ink particles may be smaller than the wavelength of light. The color of the ink particles may include at least one of red, green, yellow, and blue. For example, the phosphor emits red wavelengths, and the ink particles may contain red. For example, the red color of the ink particles may be darker than the color of the phosphor or the wavelength of light. The ink particles may have a color different from the color of light emitted from the light emitting device 21. The ink particles can have the effect of blocking or blocking incident light.

The lighting module 101 according to the second embodiment may include phosphor and ink particles in the first resin layer 61. Since the light generated from the light emitting device 21 is blocked by the ink particles, hot spots can be reduced. The concentration of phosphors can be significantly reduced by the ink particles. For example, in the case of a lighting module without ink particles, the phosphor content can be increased to 35% or more, and in the case of a lighting module containing ink particles, the phosphor content can be reduced to 23% or less. By using the first resin layer 61 having the ink particles, the surface of the lighting module 101 or the surface of the first resin layer 61 can be provided similar to the surface color when light is emitted. In other words, the chromaticity or color difference of the surface of the first resin layer 61 depending on whether the light emitting device 21 is turned on or off can be reduced.

The first resin layer 61 may include a phosphor, a diffusion agent, and ink particles. In this case, the content of the diffusion agent may be 3 wt% or less, for example, in the range of 1 wt% to 3 wt%, and the content of the phosphor may be 23 wt%. % or less or in the range of 10 wt% to 23 wt%, and the ink particles may be added in 12 wt% or less, for example, in the range of 4 wt% to 12 wt%. In this first resin layer 61, hot spots can be reduced and light transmittance can be prevented from decreasing by the content of the diffusion agent, and wavelength conversion efficiency can be prevented from decreasing by the content of the phosphor, and the ink particles The content of can reduce the difference in surface color and lower hot spots.

When the first resin layer 61 includes phosphor and ink particles, the diffusion agent may be 0 wt%. In this structure, the content of the phosphor may be added at 23 wt% or less or in the range of 10 wt% to 23 wt%, and the ink particles may be added at 12 wt% or less, for example, in the range of 4 wt% to 12 wt%. The phosphor content in the first resin layer 61 may be 3 wt% or more than the content of the ink particles, or may be added higher in the range of 3 wt% to 13 wt%. Since the weight of the ink particles is smaller than that of the phosphor, the ink particles may be distributed in an area closer to the surface of the first resin layer than the phosphor. Accordingly, the color of the surface of the first resin layer 61 can be provided as the color of ink particles. Transmission of light can be suppressed by these ink particles, and hot spots can be reduced.

The color on the surface of the first resin layer 61 can be provided as the color of ink particles, and the color difference in the external image depending on the on/off of the light emitting device 21 can be reduced and the wavelength conversion efficiency can be reduced. can be prevented. Additionally, transmission of the wavelength of light or blue light emitted from the light emitting device 21 through the first resin layer 61 can be reduced. Additionally, the light emitted through the first resin layer 61 can be provided as a surface light source based on the wavelength of the phosphor. The thickness of the first resin layer 61 may be 3 mm or more, for example, in the range of 3 mm to 5 mm. The thickness of the first resin layer 61 may be equal to or smaller than the gap between the light emitting devices 21.

The first resin layer 61 may be molded on the light emitting device 21 and hardened. The lighting module 101 has a thickness of 5.5 mm or less, can emit a planar light source through its upper surface, and can have flexible characteristics. The lighting module 101 may emit light through the top and side surfaces.

Figure 15 is a first modified example of the lighting module of Figure 14.

Referring to FIG. 15, the lighting module 101A may include a substrate 11, a light emitting element 21, a first resin layer 47, and a first diffusion layer 62.

In the lighting module 101, the first structural example may include a diffusion agent and a phosphor in the first resin layer 47, and may include ink particles in the first diffusion layer 62. The second structural example may include a diffusion agent in the first resin layer 47, and may include a phosphor and ink particles in the first diffusion layer 62. The third structural example is a layer in which the first resin layer 47 is free of impurities, and the first diffusion layer 62 may include a phosphor, ink particles, and a diffusion agent. The fourth structural example may include a phosphor added to the first resin layer 47 and ink particles in the first diffusion layer 62. The fifth structural example may be a layer containing no impurities in the first resin layer 47 and a layer containing phosphor and ink particles in the first diffusion layer 62. In the fourth and fifth structural examples, a diffusion agent may not be added to the first resin layer 47 and the first diffusion layer 62.

The content of the dispersant in the first resin layer 47 may be 3 wt% or less, for example, in the range of 1 wt% to 3 wt%. If the content of the diffusion agent is less than the above range, there is a limit to lowering the hot spot, and if it is greater than the above range, light transmittance may be reduced. Accordingly, by disposing the diffuser in the above content in the first resin layer 47, it can diffuse light and reduce hot spots without reducing light transmittance.

The content of the phosphor added to the first resin layer 47 or the first diffusion layer 62 may be 23 wt% or less or in the range of 10 wt to 23 wt%. Accordingly, the diffusion and wavelength conversion efficiency of light in the lighting module can be improved. In addition, transmission of the wavelength of light emitted from the light emitting device 21, for example, blue light, through the first diffusion layer 62 can be reduced. Additionally, light extracted through the first diffusion layer 62 may be provided as a planar light source based on the wavelength of the phosphor. The phosphor may include, for example, at least one of red phosphor, amber phosphor, yellow phosphor, green phosphor, or white phosphor.

The content of ink particles added to the first diffusion layer 62 may be 12 wt% or less or in the range of 4 wt to 12 wt%. Accordingly, the surface color on the surface of the first diffusion layer 62 can be improved and light diffusion and hot spots can be prevented. The color of the ink particles may be the same as the color of light whose wavelength is converted by the phosphor. The color of the ink particles may be the same as the color of the phosphor.

The first resin layer 47 molds the light emitting device 21 and may be in contact with the upper surface of the substrate 11. The first resin layer 47 may have a thickness of 3 mm or more, for example, in the range of 3 mm to 4 mm. Since the first resin layer 47 is provided in the above thickness range, it can improve the spreadability of light. The first resin layer 47 can improve light diffusion when at least one of a diffusion agent and a phosphor is disposed therein.

The first diffusion layer 62 may be made of a transparent resin material, such as UV (Ultra violet) resin, epoxy, or silicone. The refractive index of the first diffusion layer 62 may be 1.8 or less, for example, in the range of 1.1 to 1.8 or 1.4 to 1.6, and may be lower than the refractive index of the diffusion agent. The thickness of the first diffusion layer 62 may be smaller than the thickness of the first resin layer 47. The thickness of the first diffusion layer 62 may be 0.3 mm or more, for example, in the range of 0.3 mm to 0.7 mm.

The phosphor added into the first diffusion layer 62 may have a content difference from the resin material of the first diffusion layer 62 of 20% or less or 10% or less. The content of phosphor may be added to the first diffusion layer 62 in an amount of 10 wt% or more or in the range of 10 wt to 23 wt%. Accordingly, the color on the surface of the first diffusion layer 62 can be provided as the color of the phosphor, and light diffusion and wavelength conversion efficiency can be improved. In addition, transmission of the wavelength of light emitted from the light emitting device 21, for example, blue light, through the first diffusion layer 62 can be reduced. Additionally, light extracted through the first diffusion layer 62 may be provided as a planar light source based on the wavelength of the phosphor. By providing the first diffusion layer 62 with a thickness within the above range, light can be diffused and its wavelength converted. These lighting modules can be provided as area light sources. The lighting module according to the embodiment has a thickness of 5.5 mm or less, can emit a planar light source through the upper surface, and can have flexible characteristics. The lighting module may emit light through a side surface. The lighting module may include a flexible structure or a curved structure.

FIG. 16 is a modified example of the lighting module of FIG. 15. For parts identical to the configuration of FIG. 15, the configuration and description of FIG. 15 will be referred to. Referring to FIG. 16, the lighting module 102 has a first diffusion layer 62 disposed on a first resin layer 47 covering the light emitting device 21 disclosed in the embodiment, and the first diffusion layer 62 is It may include a side portion 62a covering a side surface of the first resin layer 47.

The side portion 62a of the first diffusion layer 62 is disposed along the side of the first resin layer 47 and covers the side of the first resin layer 47. The side portion 62a may extend from the upper edge of the first resin layer 47 toward the upper surface of the substrate 11. The side surface 62a of the first diffusion layer 62 may be in contact with the upper surface of the substrate 11. By contacting the side portion 62a of the first diffusion layer 62 along the outer circumference of the substrate 11, moisture infiltration can be prevented and the side surface of the lighting module can be protected. The side surface 62a of the first diffusion layer 62 may include the phosphor and ink particles described above. The side portion 62a of the first diffusion layer 62 may be formed on one side, at least two sides, or all sides of the first resin layer 47, or may leave at least one side open. Some light may be extracted through the open area.

Since ink particles are added to the first diffusion layer 62 and its side surface 62a, the color of the surface color of the first diffusion layer 62 is different from the color when the light emitting device 21 is driven. The difference in color may be reduced. That is, the color produced by the ink particles can be seen as a clearer and darker color when viewed from a relatively long distance, even when the light emitting device 21 is turned off. Accordingly, even if the light emitting device 21 is in the on/off state, the difference in surface color of the lighting module can be reduced.

An adhesive may be disposed between the first resin layer 47 and the first diffusion layer 62. The adhesive is a transparent material and may be an adhesive such as UV adhesive, silicone, or epoxy. The first diffusion layer 62 may be adhered in the form of a film or may be injection molded. When the first diffusion layer 62 is provided in the form of a film, it can be attached with an adhesive, provide uniform light distribution, and provide surface color at a certain level or higher. The first diffusion layer 62 may be a second resin layer, which will be described later.

In the second embodiment of the invention, without adding a diffusion agent to the first resin layer 47, the luminous flux according to the content of the phosphor and ink particles added to the first diffusion layer 62 is compared as follows. For the experiment, as shown in Table 1, an example in which red phosphor and red ink particles were added to the first diffusion layer, and the reference example (Ref) contained 50 wt% of red phosphor and 10 wt% of diffusion agent without red ink particles. This is an example of addition.

In the first diffusion layer 62, in Examples 1 to 3, the phosphor content is 10 wt% and the red ink particle content is 5 wt%, 7 wt%, and 10 wt%, respectively. In Examples 4 to 6, the phosphor content is 15 wt%, and the red ink particle content is 5 wt%, 7 wt%, and 10 wt%, respectively. In Examples 7 to 9, the phosphor content is 15 wt%, and the red ink particle content is 5 wt%, 7 wt%, and 10 wt%, respectively.

Phosphor [wt%] Red Ink [wt%] Example 1 10 5 Example 2 7 Example 3 10 Example 4 15 5 Example 5 7 Example 6 10 Example 7 20 5 Example 8 7 Example 9 10

Table 1 shows the experimental configurations of Examples 1 to 9 in which phosphor and ink particles were added to the first diffusion layer in the above amounts. As shown in Figure 26, when the light emitting device is in the off state, the surface color of the reference example (Ref) appears yellow (amber), but the surface color of Examples 1 to 9 appears red. When the light emitting device is in the on state, the surface color may become brighter as the content of the phosphor increases, and it can be seen that the luminous flux decreases as the content of the ink particles increases.

Table 2 is a diagram comparing the color coordinates and luminous flux of the reference example in Table 1 and Examples 1 to 9.

Experiment example CIE (Cx,Cy) Luminous flux (lm) Ref Cx: 0.6903Cy: 0.3011 74.88 Example 1 Cx: 0.6882Cy: 0.3053 59.86 Example 2 Cx: 0.6912Cy: 0.3006 43.60 Example 3 Cx: 0.6942Cy: 0.2968 30.70 Example 4 Cx: 0.6902Cy: 0.3031 63.75 Example 5 Cx: 0.6885Cy: 0.3028 52.27 Example 6 Cx: 0.6938Cy: 0.2971 34.08 Example 7 Cx: 0.6921Cy: 0.3011 60.45 Example 8 Cx: 0.6872Cy: 0.3037 53.63 Example 9 Cx: 0.6917Cy: 0.2994 34.46

In Table 2, the standard example has the highest luminous flux, but the color difference in the outer image depending on the off/on state of the light emitting element in the lighting module is large. In this case, the visibility of the module when the light emitting element is turned off may be reduced. In addition, it may cause the content of phosphor to increase. In Examples 1 to 9, the difference in color coordinates from the reference example is not large, and it can be seen that the color of the external image is red when the light emitting device is on and off. Among examples 1 to 9, examples 1, 4, and 7 can be selected where the difference in luminous flux is 20% or less and the surface color is red compared to the reference example. Here, it can be seen that Examples 1, 4, and 7 have the highest luminous flux when the red ink particles are 5 wt% relative to the content of the first diffusion layer and the phosphor content is in the range of 10 wt% to 20 wt%.

Therefore, in the second embodiment of the invention, referring to Examples 1 to 9, the content of ink particles in the first diffusion layer is selectively added within the range of 4wt% to 12wt% and the content of the phosphor is within the range of 10wt% to 23wt%. can do.

Figure 17 is a third modified example of the lighting module according to the second embodiment.

Referring to FIG. 17, the lighting module may include a substrate 11, a light emitting element 21, a first resin layer 47, a first diffusion layer 51, and a second resin layer 63. The first resin layer may include a diffusion agent or may be provided without a diffusion agent. The first diffusion layer may be a layer to which a phosphor is added. The second resin layer 63 may be a layer to which ink particles are added. As another example, the first diffusion layer may be a layer to which a phosphor and a diffusion agent are added. As another example, the second resin layer 63 may include phosphor and ink particles. Here, a phosphor may be added to the first diffusion layer and the second resin layer 63, and the first diffusion layer and the second resin layer 63 may include the same phosphor or different phosphors.

The second resin layer 63 may be disposed on the first diffusion layer. The first diffusion layer may be disposed between the first resin layer and the second resin layer 63. The thickness of the second resin layer 63 may be smaller than the thickness of the first diffusion layer. The thickness of the first diffusion layer may be 0.3 mm or more, for example, in the range of 0.3 mm to 0.7 mm. The thickness of the second resin layer 63 may be 0.1 mm or more, for example, in the range of 0.1 mm to 0.5 mm.

At least one or both of the first diffusion layer and the second resin layer 63 may cover the side surface of the first resin layer.

The phosphor may include at least one of red, green, blue, amber, and yellow phosphors. The ink particles may have the same color as the color of the phosphor or a color wavelength converted from the phosphor.

FIG. 18 is a modified example of FIG. 17 and is a fourth modified example of the lighting module according to the second embodiment.

Referring to FIG. 18, the lighting module may include a substrate 11, a light emitting element 21, a first resin layer 31, a first diffusion layer 41, and a second resin layer 64. A second resin layer 64 may be disposed on the side of the first resin layer 31. The side portion 64a of the second resin layer 64 may be adhered to the upper surface of the substrate 11. The side surface 64a of the second resin layer 64 may be in contact with the side surface of the first diffusion layer 41 and the side surface of the first resin layer 31. Accordingly, the second resin layer 64 can improve the color difference between surface colors in the lateral direction. A phosphor may be disposed in the first diffusion layer 41, or a phosphor and a diffusion agent may be added. The second resin layer 64 may include phosphor and ink particles.

FIG. 19 is a modified example of FIG. 17 and is a fifth modified example of the lighting module according to the second embodiment.

Referring to FIG. 19, the lighting module may include a substrate 11, a light emitting element 21, a first resin layer 31, a first diffusion layer 56, and a second resin layer 66. A second resin layer 66 may be disposed on the side of the first resin layer 31. The side portion 66a of the second resin layer 66 may be adhered to the upper surface of the substrate 11. The side portion 66a of the second resin layer 66 may contact the side surface of the first diffusion layer 56 and the side surface of the first resin layer 31. The first diffusion layer 56 may be formed by adding a phosphor or a phosphor and a diffusion agent. The second resin layer 66 may include ink particles without phosphor. Accordingly, the second resin layer 66 can improve the color difference between surface colors in the lateral direction.

FIG. 20 is a modified example of FIG. 17 and is a sixth modified example of the lighting module according to the second embodiment.

Referring to FIG. 20, the lighting module may include a substrate 11, a light emitting element 21, a first resin layer 47, a first diffusion layer 52, and a second resin layer 63. A first diffusion layer 52 may be disposed on the side of the first resin layer 47. The side surface 52a of the first diffusion layer 52 may be adhered to the upper surface of the substrate 11. The side surface 52a of the first diffusion layer 52 may be in contact with the side surface of the first resin layer 47. The first resin layer 47 may be provided as a transparent material with or without a diffusion agent. The first diffusion layer 52 may have a phosphor added thereto. The second resin layer 63 may include ink particles without phosphor. The side surface portion 52a of the first diffusion layer 52 covers the side surface of the first resin layer 47. The side portion 52a of the first diffusion layer 52 may be exposed in the side direction of the lighting module. The surface color of the side surface 52a of the first diffusion layer 52 and the second resin layer 63 may be different from each other. The surface color of the second resin layer 63 may have a darker color than the color of the side surface 52a of the first diffusion layer 52.

In the structures of FIGS. 17 and 20 disclosed above, the content of ink particles added to the first resin layers 63, 64, and 66 may be 12 wt% or less or in the range of 4 wt to 12 wt%. Accordingly, the surface color of the surfaces of the first resin layers 63, 64, and 66 can be improved and hot spots can be prevented by blocking light. The color of the ink particles may be the same as the color of light whose wavelength is converted by the phosphor. The color of the ink particles may be the same as the color of the phosphor.

The thickness of the first diffusion layers 51, 41, and 52 may be 0.3 mm or more, for example, in the range of 0.3 mm to 0.7 mm. The content of the phosphor added in the first diffusion layer (51, 41, 52) may be 10 wt% or more or in the range of 10 wt to 23 wt%.

21 to 24 show seventh to tenth modifications of the second embodiment, which have a structure in which two or more layers are stacked on a first resin layer.

Referring to Figure 21, the lighting module includes a substrate 11, a light emitting element 21, a first resin layer 31, a first diffusion layer 41, a second diffusion layer 56, and a second resin layer 63. It can be included. The configuration of the second resin layer 63 is the same as the above configuration, and the configuration of the first and second diffusion layers 41 and 56 will refer to the description of the first embodiment.

For example, a diffusion agent may be added to the first diffusion layer 41, and a phosphor may be added to the second diffusion layer 56. The ink particles disclosed above may be added to the second resin layer 63. The side portion 63a of the second resin layer 63 covers the side surfaces of the first and second diffusion layers 41 and 56 and the side surfaces of the first resin layer 31. The side portion 63a of the second resin layer 63 is in contact with the side surface of the first and second diffusion layers 41 and 56 and the side surface of the first resin layer 31 and is in contact with the upper surface of the substrate 11. You can.

Referring to FIG. 22, the lighting module may include a substrate 11, a light emitting element 21, a first resin layer 47, a first diffusion layer 52, and a second resin layer 63. The configuration of the second resin layer 63 is the same as the above configuration, and the configuration of the first diffusion layer 52 will refer to the descriptions of the first and second embodiments.

For example, a phosphor may be added to the first diffusion layer 52, or a phosphor and a diffusion agent may be added. If the first diffusion layer 52 has a diffusion agent, phosphor and ink particles may be added to the second resin layer 63. When a phosphor is added to the first diffusion layer 52, the second resin layer 63 may include ink particles without a phosphor.

The side surface portion 52a of the first diffusion layer 52 may be disposed on the side surface of the first resin layer 63. The side portion 63a of the second resin layer 63 may be disposed outside the side portion 52a of the first diffusion layer 52. The side surface 63a of the second resin layer 63 may be disposed between the side surface 52a of the first diffusion layer 52 and the side surface of the first resin layer 47. The side surface 52a of the first diffusion layer 52 and the side surface 63a of the second resin layer 63 may be in contact with the upper surface of the substrate 11.

Referring to Figure 23, the lighting module includes a substrate 11, a light emitting element 21, a first resin layer 31, a first diffusion layer 41, a second diffusion layer 57, and a second resin layer 63. It can be included. The configuration of the second resin layer 63 is the same as the above configuration, and the configuration of the first and second diffusion layers 41 and 57 will refer to the description of the first embodiment.

For example, a diffusion agent may be added to the first diffusion layer 41, and a phosphor may be added to the second diffusion layer 57. The ink particles disclosed above may be added to the second resin layer 63.

The side portion 57a of the second diffusion layer 57 may be disposed on the side of the first resin layer 31. The side portion 63a of the second resin layer 63 may be disposed outside the side portion 57a of the second diffusion layer 57. The side surface 63a of the second resin layer 63 may be disposed between the side surface 57a of the second diffusion layer 57 and the side surface of the first resin layer 31. The side surface 57a of the second diffusion layer 57 and the side surface 63a of the second resin layer 63 may be in contact with the upper surface of the substrate 11.

Referring to Figure 24, the lighting module includes a substrate 11, a light emitting element 21, a first resin layer 31, a first diffusion layer 41, a second diffusion layer 56, and a second resin layer 63. It can be included. The configuration of the second resin layer 63 is the same as the above configuration, and the configuration of the first and second diffusion layers 41 and 56 will refer to the description of the first embodiment.

For example, a diffusion agent may be added to the first diffusion layer 41, and a phosphor may be added to the second diffusion layer 56. The ink particles disclosed above may be added to the second resin layer 63.

The side portion 41a of the first diffusion layer 41 may be disposed on the side of the first resin layer 31. The side portion 56a of the second diffusion layer 56 may be disposed outside the side portion 41a of the first diffusion layer 41. The side portion 63a of the second resin layer 63 may be disposed outside the side portion 56a of the second diffusion layer 56. The side portion 56a of the second diffusion layer 56 may be disposed between the side portion 41a of the first diffusion layer 41 and the side portion 63a of the second resin layer 63. The side portion 41a of the first diffusion layer 41, the side portion 56a of the second diffusion layer 56, and the side portion 63a of the second resin layer 63 may be in contact with the upper surface of the substrate 11. there is.

Figure 25 is an 11th modified example of the lighting module according to the second embodiment.

Referring to FIG. 25, the lighting module includes a substrate 11, a light emitting element 21 disposed on the substrate 11, a first resin layer 31 on the substrate 11, and the first resin layer. (31) on the adhesive layer 45 and the light blocking portion 46, on the adhesive layer 46 and the light blocking portion 46, a first diffusion layer 52, and on the first diffusion layer 52, a second resin layer. (63) may be included. For the configuration of the first diffusion layer 52 and the second resin layer 63, refer to the description of the second embodiment disclosed above.

The adhesive layer 45 may be adhered between the first resin layer 31 and the first diffusion layer 52. The adhesive layer 45 may be made of the same material as that of the first resin layer 31 and the first diffusion layer 52, or may be made of a different material. The adhesive layer 45 may be made of a resin material such as silicone or epoxy. The adhesive layer 45 may be disposed around the light blocking part 46 or may extend to the lower surface of the light blocking part 46. The light blocking portion 46 may be disposed on the lower surface of the first diffusion layer 41 in an area corresponding to the light emitting device 21. The light blocking portion 46 may be 50% or more of the top surface area of the light emitting device 21, for example, in the range of 50% to 120%. The light blocking portion 46 may be formed through an area printed with a white material. The light blocking portion 46 can be printed using a reflective ink containing any one of, for example, TiO ₂ , Al ₂ O ₃ CaCO ₃ , BaSO ₄ , and Silicon. The light blocking portion 46 reflects light emitted through the light emitting surface of the light emitting device 21, thereby reducing the occurrence of hot spots caused by the luminance of light on the light emitting device 21. The light blocking part 46 can print a light blocking pattern using light blocking ink. The light blocking portion 46 may be formed by printing on the lower surface of the first diffusion layer 52. The light blocking portion 46 does not block 100% of the incident light and its transmittance may be lower than its reflectance, so it can perform the function of blocking and diffusing light. The light blocking portion 46 may be formed of a single layer or multiple layers, and may have the same pattern shape or different pattern shapes.

The second resin layer 63 may include the side portion 63a disclosed above, and may cover the side surfaces of the first resin layer 31 and the first diffusion layer 52. As another example, the side portion 63a may be formed to be extended by the first diffusion layer 52. As another example, the side portion 63a of the second resin layer 63 has been described as being in contact with the upper surface of the substrate 11, but any one of the first resin layer 31 and the first diffusion layer 52 It may be contacted with the upper surface of the layer. As another example, the side portion 63a of the second resin layer 63 may be in contact with at least one of the upper surfaces of the first resin layer 31 and the first diffusion layer 52 and the upper surface of the substrate 11. there is. In this case, the outer periphery of the first resin layer 31 and the first diffusion layer 52 may be provided in the form of a concavo-convex pattern or a stepped structure.

Referring to FIG. 26, the lighting modules of FIGS. 15 and 16 according to an embodiment of the present invention may be turned on or not turned on. Light emitting element 21, for example, the surface color (Color1) of the first diffusion layer or the second resin layer, which is the uppermost layer when the LED is open, and the surface color of the first diffusion layer or the second resin layer, which is the uppermost layer when the LED is on. The color difference in (Color2) can be reduced.

The lighting module of the embodiment may dispose a first resin layer or/and a second resin layer on the first diffusion layer on the substrate 11. The embodiment may provide a flexible lighting module having a plurality of resin layers on the substrate 11. The lighting module of the embodiment guides and spreads light in the radial or direct direction within the first resin layer 31, converts the wavelength to the phosphor of the first diffusion layer 41, and ink particles of the second resin layer. Through this, the color difference in surface color can be improved. Accordingly, the light to be finally emitted through the lighting module is emitted as a surface light source. In addition, the plurality of light emitting elements 21 in the lighting module 100 emit light on five sides on the flexible circuit board in a flip manner, and the light emitted through the top and side surfaces of the light emitting elements 21 is emitted in the top and side directions. It can be.

The light emitted from the light emitting device 21 may emit light in the upper surface and all side directions of the lighting module. The above-mentioned lighting module can be applied to vehicle lamps, display devices with micro LEDs, or various lighting devices.

As the above-mentioned lighting module provides a surface light source, an additional inner lens can be removed, and the first resin layer 31 seals the light-emitting devices 21, thereby allowing air to be released on the light-emitting device 21. The gap or structure for inserting the light emitting device 21 can be removed.

When viewed from the side, the lighting module 100 may have a flat plate shape, a convex curved shape, a concave curved shape, or a convex/concave shape. When viewed from the top, the lighting module may have a bar shape such as a stripe, a polygonal shape, a circular shape, an oval shape, a shape with a convex side surface, or a shape with a concave side surface.

<Third embodiment>

The third embodiment is an example of a lighting device to which the lighting module disclosed above is applied. Figure 27 is an example of a lamp to which the lighting module according to the first and second embodiments disclosed above is applied in the third embodiment of the invention, and Figure 27 is an example of a lamp to which the lighting module according to the embodiment of the invention is applied. , FIG. 28 is an example of a blade portion on which a lighting module is disposed in the lamp of FIG. 27, FIG. 29 is another example of a blade portion on which a lighting module is disposed in the lamp of FIG. 27, and FIG. 30 is an example of a blade portion on which a lighting module is disposed. is an example of the blade unit where the lighting module is arranged, and Figure 31 is another example where the lighting module according to an embodiment of the invention is arranged above and below the blade unit. In describing the third embodiment, the configurations of the first and second embodiments disclosed above can be selectively applied, and redundant description will be omitted.

27 to 29, the lamp includes a housing 110, a blade portion 130 having a rotating body 132 and a blade 134 coupled to the housing 110, and the rotating body ( It may include a light-transmitting cover 120 covering 132).

The housing 110 includes a motor unit (not shown) therein, and the motor unit may be coupled to the shaft protrusion 139 of the rotating body 132. This housing 110 may be a cover placed inside the vehicle or at the rear of the vehicle.

Here, the blade unit 130 may include a rotating body 132 at the center and a plurality of blades 134 on the outer peripheral surface of the rotating body 132. The blade unit 130 may have an accommodating space therein or may be coupled with a shaft protrusion 139. The blade unit 130 may include the disclosed lighting module 102 on each blade 134.

The blades 134 may be arranged radially from the outer peripheral surface of the rotating body 132. The rotating body 132 may have a cylindrical shape. The rotating body 132 may be arranged one or more on the housing 110.

The blade 134 may be formed integrally with the rotating body 132, or may be manufactured separately and then combined. The rotating body 132 may function as a hub supporting the blade 134. The blades 134 may be spaced apart at equal intervals along the outer peripheral surface of the rotating body 132. The blades 134 may be provided in a twisted shape with respect to the axis of rotation to generate axial flow and/or transverse flow.

The rotating body 132 may be rotated by rotational force transmitted from the motor unit, and the blade 134 may rotate along the rotating body 132. Here, when the lamp is coupled to a moving means such as a vehicle, the rotating body 132 can be rotated by the motor unit, and the motor unit increases or decreases the rotation speed according to the moving speed of the vehicle, and the number is controlled by a control unit. (not shown) may be included. For example, if the vehicle is below the reference speed, the rotation speed of the rotating body 132 may be controlled to be below the reference speed, and if the vehicle is above the reference speed, the rotation speed of the rotating body 132 may be controlled to be above the reference speed. Alternatively, the rotating body 132 can be controlled at a rotation speed that is proportional or inversely proportional to the vehicle speed.

The light-transmitting cover 120 may be placed on the rotating body 132 and coupled to the housing 110. The light-transmitting cover 120 may cover the rotating body 132 and protect the rotating body 132.

The light-transmitting cover 120 may include at least one of a transparent material, a red material, or a yellow material.

A lamp according to an embodiment of the invention may emit rotatable light therein or may include a rotating lighting module 102.

For example, as shown in FIGS. 28 and 30, the lighting module 102 disclosed above may be coupled to the front surface of at least one or two or more of the blades 134. The lighting module 102 includes a substrate 11 disposed on the front surface of the blade 134, a light emitting element 21 on the substrate 11, a first resin layer 55 on the light emitting element 21, and It may include a first diffusion layer 62 or/and a second resin layer (63 in FIG. 22) on the first resin layer 55. When the first diffusion layer 62 is disposed on the first resin layer 55, the first diffusion layer 62 may include at least one of a diffusion agent and a phosphor. As another example, at least one of the first resin layer 55 and the first diffusion layer 62 may include a phosphor. When the second resin layer is disposed on the first resin layer 55, the second resin layer may include ink particles. At least one of the first and second resin layers may include a phosphor.

The blade 134 may be made of a thermally conductive material, or may be made of a metal or non-metal material. The blade 134 can dissipate heat generated from the light emitting device 21. The front surface of the blade 134 and the bottom surface of the substrate 11 may be bonded using adhesive or thermally conductive adhesive. Since the substrate 11 and the lighting module 102 having the same are provided in a flexible manner, they can be in close contact with the front surface of the blade 134.

The size of the lower surface of the lighting module 102 disposed in front of each blade 134 may be the same as or smaller than the size of the front surface of the blade 134. The lighting module 102 may receive power from the housing 110 through the rotating body 132.

Each blade 134 may provide a plurality of recesses or/and holes (not shown) to strengthen the coupling of the lighting module 102 with the substrate 11. That is, the adhesive area or amount of adhesive can be increased through the recess, and the lighting module 102 can be fastened to the lighting module 102 through the hole as a fastening member. As another example, the first resin layer 55 may be exposed to the lower surface of the substrate 11, and the first resin layer 55 may be adhered to an adhesive disposed on the front side of the blade 134. there is. The support of the lighting module 102 can be strengthened by adhesion of the first resin layer 55 and the adhesive.

The lighting module 102 disclosed in the embodiment can selectively apply surface color or emitted light. As shown in FIG. 28, the lighting modules 102 disposed on the front of the blade 134 may have a red color or a yellow color on the surface. The same lighting module 102 may be placed on the front of all blades 134. As shown in FIG. 30 , different lighting modules 102 and 102A may be placed in front of different blades 134, and the different lighting modules 102 and 102A may emit different lights. Alternatively, different lighting modules 102 may have different surface colors. Here, the surface color or different lights may include at least two of red, green, yellow, blue, and white. For example, when the first and second lights are emitted from different lighting modules 102, the first light may emit red light and the second light may emit yellow light.

FIG. 31 is another example of FIG. 30, and the blade unit may include different lighting modules 102 and 103. A first lighting module 102 may be disposed on the front of the blade 134 and a second lighting module 103 may be disposed on the rear of the blade 134. The first lighting module 102 may be the lighting module of FIG. 30. The second lighting module 103 may be the same as or different from the first lighting module 102. For example, the first lighting module 102 is a lighting module disclosed in the second embodiment, and the second lighting module 103 is a lighting module. It may be the lighting module disclosed in the first embodiment.

Since the second lighting module 103 is disposed at the rear of the blade 134, it may not be visible to the user from the front. This second lighting module 103 may emit light of a different color or different from that of the first lighting module 102. The light emitted from the second lighting module 103 is reflected by a reflective layer disposed in the storage area of the housing 110 and may be emitted in all directions.

For example, when the first lighting module 102 is driven, it may emit red light, and when the second lighting module 103 is driven, it may emit yellow or blue light. The first and second lighting modules 102 and 103 may be driven separately or simultaneously. For example, when the first and second lighting modules 102 and 103 are driven separately, the mode of the first lighting module 102 emitting a red lamp and the second lighting module 103 emitting a yellow or blue lamp are used. It can be driven in mode. It can provide red or yellow light depending on the initial vehicle driving condition.

The side of the blade 134 on which the lighting modules 102 and 102A are not installed may provide the same color as the surface color of the lighting modules 102 and 103. For example, the side of the blade 134 may be treated with paint having the same color as the ink added to the second resin layer. Accordingly, the surface of the blade 134 and the lighting modules 102 and 102A can be provided as a lamp without color distinction.

By arranging the lighting module 102 on the blade 134 according to an embodiment of the invention, it can be provided as a lamp that provides a beautiful finish or dynamic lighting by the rotating lighting module.

Additionally, the lighting order of the lighting module 102 of each blade 134 can be controlled to sequentially turn on or turn off. Additionally, to save power, the light-emitting elements within each lighting module can be partially driven in the entire area. The lighting module 102 having these light-emitting elements can have an improved heat dissipation effect due to the rotational flow of air.

Figure 32 is a modified example of Figures 28 and 29, and is an example of illumination using the light emitting device 21.

Referring to FIG. 32, a plurality of light emitting elements 21 may be arranged on the front or/and rear of the rotating body 132. The light emitting device 21 may be connected through the substrate 11, as shown in FIG. 33, or may be connected through a separate wiring pattern. The light emitting device 21 may emit light toward the center of the rotating body 132. As another example, the light emitting device 21 may emit light in a direction opposite to the rotating body 132.

The rotating body 132 may include a transparent resin material. This transparent resin material can function as a light guide plate that transmits the light emitted from the light emitting device 21. The blade 134 may be made of a transparent or reflective material. Additionally, since the rotating body 132 rotates, the light emitted from the light emitting device 21 may be irradiated through the rotating body 132 or may be radiated in the direction of the blade 134. Light traveling through the blade 134 or the rotating body 132 may be provided as a surface light source.

Here, as shown in FIG. 33, the rear surface of the rotating body 132 may include a plurality of recesses r1. The recess r1 may have a ring shape and may be single or may be spaced apart from one another. A first resin layer 55, a first diffusion layer 62, and a light emitting device 21 may be disposed in the recess r1. As another example, the recess r1 includes at least one of the components on the substrate disclosed in the first and second embodiments, such as a light emitting element and a first resin layer, a first diffusion layer, a second resin layer, or a second diffusion layer. can be placed.

The light emitting elements 21 disposed in the plurality of recesses r1 may be disposed on the substrate 11. The substrate 11 may be electrically connected to a plurality of light emitting devices 21 and may be attached to the rear surface of the rotating body 132. Here, the rotating body 132 may be made of a transparent material. The blade 134 may be made of a transparent or reflective material. The light emitted from the light emitting element 21 disposed in each recess r1 of the rotating body 132 is emitted in the front direction through the rotating body 132, is transmitted through the blade 134, or is transmitted through the blade 134. It can be reflected by (134). Light reflected or transmitted through the blade 134 may be diffused in the rotational direction, and the diffused light may be emitted through the light-transmitting cover. Accordingly, light from the surface light source may be emitted through the light-transmissive cover.

Figures 34 and 35 are other examples of Figure 32. Referring to FIGS. 34 and 35 , a plurality of light emitting devices 21 or the lighting module 104 may be disposed on the outer peripheral surface of the rotating body 132. The light emitting device 21 or lighting module 104 may be disposed between the front or rear of the rotating body 132 and the blade 134. The light emitting device 21 or lighting module 104 irradiates the generated light in the direction of the blade 134. At this time, the blade 134 may be made of a transparent material. The rotating blade 134 may change the path of light incident through the light emitting device 21 or the lighting module 104 and emit it toward the front of the rotating body 132. The light emitting device 21 may be a side view type package. The light emitting device 21 may be coupled to a groove or recess on the outer peripheral surface of the rotating body 132 as shown in FIG. 33. In the case of the lighting module 104, since it provides a surface light source, it can be illuminated through the blade 134. The blade 134 can diffuse incident light in a rotational direction, and the diffused light can be emitted through a light-transmitting cover.

Figure 36 is another example of a rotating body on which the light emitting element 21 is disposed in an embodiment of the invention, Figure 37 is an exploded side cross-sectional view showing the reflective layer of the housing disposed around the blade portion of Figure 36, and Figure 38 is a In an embodiment of the invention, this is a cross-sectional view of the front side of the blade portion and the fixed body of the housing where the light emitting device is disposed.

36 to 37, the fixed body 159 of the housing 170 may include a motor unit, and the outer cover 174 of the housing 170 may be spaced apart from the fixed body 159.

A plurality of reflective layers 172 may be disposed on the inner surface of the outer cover 174. The inner surface of the outer cover 174 may have a predetermined curvature or may include an inclined surface. The surface of the reflective layer 172 may have a predetermined curvature or may be formed as an inclined surface. The reflective layers 172 may be alternately arranged with the inner surface of the outer cover 174. The inner surface of the outer cover 174 may be made of a reflective material. The reflective layer 172 may be formed of a metallic or non-metallic material in a protruding or concave area. The reflective layer 172 may be formed as a reflective pattern having an embossed shape.

The rotating body 132A has a connecting portion 161 on its outer peripheral surface, and a blade portion 130A having a plurality of blades 136 may be disposed along the connecting portion. The blade portion may be arranged in a vertical direction or may be arranged in a twisted shape.

One or more light emitting devices 21 may be disposed on each outer surface of the blade 136. The light emitting device 21 emits light in a direction outside the blade 136. The light emitting device 21 may be disposed on the lower outer side of the blade 136. The light emitting device 21 may face the inner surface of the outer cover 174 of the housing 170. Accordingly, the light emitted from the light emitting device 21 may be reflected by the inner surface of the outer cover 174 of the housing 170 and emitted toward the top of the housing 170. Additionally, since the light emitting elements 21 of each blade 136 rotate together with the blade 136 and emit light, a diffused surface light source can be irradiated. The light emitting elements 21 disposed on each of the blades 136 may emit light with the same peak band wavelength or at least two peak band wavelengths.

As another example, the lighting module disclosed in the first and second embodiments may be disposed on the entire outer surface or the outer lower surface of each blade 136. The lighting module may emit a surface light source, and the surface light source may be reflected through the outer cover 174 of the housing 170 and emitted toward the top of the housing 170.

FIG. 38 is another example of FIG. 37 , and a plurality of light emitting devices 21 may be disposed along the outer circumference of the fixed body 159. The light emitting device 21 may be disposed to face the inside of the rotating body 132A. This light emitting device 21 may emit light through an area between the blades 136 of the rotating body 132A when the rotating body 132A rotates. Light emitted through the area between the blades 136 may be diffused by the blades 136, and the diffused light may be reflected through the outer cover 174 of the housing 170. . Additionally, light can be reflected more effectively by the reflective layer 172.

In this structure, the light-emitting element 21 is arranged around the fixed body 159 to which the shaft protrusion 139 is coupled, and light is emitted between the light-emitting element 21 and the corresponding blade 136. You can. Accordingly, the surface light source may be emitted through the housing 170. The light emitting devices 21 may emit light of the same peak band or light of different peak bands.

Here, the rotating body 132A or the blade 136 may be made of a transparent material, and the emitted light may be transmitted through the rotating body 132A or the blade 136. As another example, the lighting module disclosed in the first and second embodiments may be applied to the area where the light emitting device 21 shown in FIGS. 37 and 38 is disposed.

The housing according to an embodiment of the invention includes a headlamp, a sidelight, a side mirror light, a fog light, a tail lamp, a turn signal lamp, a back up lamp, a stop lamp, It can be applied to at least one of daytime running lights, vehicle interior lighting, door scarf, rear combination lamp, and backup lamp.

Figure 39 is a diagram showing an example of a light-emitting device of a lighting module according to an embodiment.

Referring to FIG. 39, the light emitting device includes a light emitting structure 225 and a plurality of electrodes 245 and 247. The light emitting structure 225 may be formed of a compound semiconductor layer of group II to VI elements, for example, a compound semiconductor layer of group III-V elements or a compound semiconductor layer of group II-VI elements. The plurality of electrodes 245 and 247 are selectively connected to the semiconductor layer of the light emitting structure 225 and supply power.

The light emitting device may include a substrate 221. The substrate 221 is disposed on the light emitting structure 225. The substrate 221 may be, for example, a light-transmitting, insulating, or conductive substrate. For example, the substrate 221 may be made of at least one of sapphire (Al ₂ O ₃ ), SiC, Si, GaAs, GaN, ZnO, Si, GaP, InP, Ge, and Ga ₂ O ₃ . A plurality of convex portions (not shown) may be formed on at least one or both of the top and bottom surfaces of the substrate 221 to improve light extraction efficiency. The side cross-sectional shape of each convex portion may include at least one of a hemispherical shape, a semi-elliptical shape, or a polygonal shape. This substrate 221 may be removed, but there is no limitation thereto.

At least one of a buffer layer (not shown) and a low-conductivity semiconductor layer (not shown) may be included between the substrate 221 and the light emitting structure 225. The buffer layer is a layer to alleviate the difference in lattice constant between the substrate 221 and the semiconductor layer, and can be selectively formed from group II to VI compound semiconductors. An undoped group III-V compound semiconductor layer may be further formed under the buffer layer, but the present invention is not limited thereto.

The light emitting structure 225 may be disposed under the substrate 221 and includes a first conductive semiconductor layer 222, an active layer 223, and a second conductive semiconductor layer 224. Another semiconductor layer may be further disposed on at least one of the above and below each of the layers 222, 223, and 224, but is not limited thereto.

The first conductive semiconductor layer 222 is disposed under the substrate 221 and may be implemented as a semiconductor doped with a first conductive dopant, for example, an n-type semiconductor layer. The first conductive semiconductor layer 222 includes a composition of In _x Al _y Ga _{1 -x- y} N (0≤x≤1, 0≤y≤1, 0≤x+y≤1). The first conductive semiconductor layer 222 may be selected from compound semiconductors of group III-V elements, such as GaN, AlN, AlGaN, InGaN, InN, InAlGaN, AlInN, AlGaAs, GaP, GaAs, GaAsP, and AlGaInP. . The first conductive dopant is an n-type dopant and includes dopants such as Si, Ge, Sn, Se, and Te. The active layer 223 is disposed under the first conductive semiconductor layer 222 and optionally includes a single quantum well, multiple quantum well (MQW), quantum wire structure, or quantum dot structure. It includes the cycle of the well layer and the barrier layer. The period of the well layer/barrier layer is, for example, InGaN/GaN, GaN/AlGaN, AlGaN/AlGaN, InGaN/AlGaN, InGaN/InGaN, AlGaAs/GaA, InGaAs/GaAs, InGaP/GaP, AlInGaP/InGaP, InP/GaAs Contains at least one of the pairs. The second conductive semiconductor layer 224 is disposed below the active layer 223. The second conductive semiconductor layer 224 is a semiconductor doped with a second conductive dopant, for example, In _x Al _y Ga _{1 -xy} N (0≤x≤1, 0≤y≤1, 0≤x+y≤ 1) It includes the composition formula. The second conductive semiconductor layer 224 may be made of at least one of compound semiconductors such as GaN, InN, AlN, InGaN, AlGaN, InAlGaN, AlInN, AlGaAs, GaP, GaAs, GaAsP, and AlGaInP. The second conductive semiconductor layer 224 is a p-type semiconductor layer, and the first conductive dopant is a p-type dopant and may include Mg, Zn, Ca, Sr, and Ba.

As another example of the light emitting structure 225, the first conductive semiconductor layer 222 may be implemented as a p-type semiconductor layer, and the second conductive semiconductor layer 224 may be implemented as an n-type semiconductor layer. A third conductive semiconductor layer having a polarity opposite to that of the second conductive type may be formed under the second conductive semiconductor layer 224. Additionally, the light emitting structure 225 may be implemented as any one of an n-p junction structure, a p-n junction structure, an n-p-n junction structure, and a p-n-p junction structure.

First and second electrodes 245 and 247 are disposed below the light emitting structure 225. The first electrode 245 is electrically connected to the first conductive semiconductor layer 222, and the second electrode 247 is electrically connected to the second conductive semiconductor layer 224. The first and second electrodes 245 and 247 may have a polygonal or circular bottom shape. A plurality of recesses 226 may be provided within the light emitting structure 225.

The light emitting device includes first and second electrode layers 241 and 242, a third electrode layer 243, and insulating layers 231 and 233. Each of the first and second electrode layers 241 and 242 may be formed as a single layer or multiple layers and may function as a current diffusion layer. The first and second electrode layers 241 and 242 include a first electrode layer 241 disposed below the light emitting structure 225; And it may include a second electrode layer 242 disposed below the first electrode layer 241. The first electrode layer 241 spreads the current, and the second electrode layer 241 reflects the incident light.

The first and second electrode layers 241 and 242 may be formed of different materials. The first electrode layer 241 may be formed of a light-transmitting material, for example, metal oxide or metal nitride. The first electrode layer 241 is, for example, indium tin oxide (ITO), ITO nitride (ITON), indium zinc oxide (IZO), IZO nitride (IZON), indium zinc tin oxide (IZTO), and indium aluminum zinc oxide (IAZO). , it can be selectively formed from indium gallium zinc oxide (IGZO), indium gallium tin oxide (IGTO), aluminum zinc oxide (AZO), antimony tin oxide (ATO), and gallium zinc oxide (GZO). The second electrode layer 242 is in contact with the lower surface of the first electrode layer 241 and may function as a reflective electrode layer. The second electrode layer 242 includes metal, such as Ag, Au, or Al. The second electrode layer 242 may partially contact the lower surface of the light emitting structure 225 when a portion of the first electrode layer 241 is removed.

As another example, the first and second electrode layers 241 and 242 may be stacked in an omni directional reflector layer (ODR) structure. The non-directional reflective structure may be formed as a stacked structure of a first electrode layer 241 having a low refractive index and a second electrode layer 242 made of a highly reflective metal in contact with the first electrode layer 241. The electrode layers 241 and 242 may, for example, be made of a laminated structure of ITO/Ag. The omnidirectional reflection angle can be improved at the interface between the first electrode layer 241 and the second electrode layer 242.

As another example, the second electrode layer 242 may be removed and formed of a reflective layer made of another material. The reflective layer may be formed in a distributed Bragg reflector (DBR) structure, which includes a structure in which two dielectric layers with different refractive indices are alternately arranged, for example, a SiO ₂ layer. , Si ₃ N ₄ layer, TiO ₂ layer, Al ₂ O ₃ layer, and MgO layer may each be included. As another example, the electrode layers 241 and 242 may include both a distributed Bragg reflection structure and a non-directional reflection structure, and in this case, a light emitting device having a light reflectance of 98% or more can be provided. Since the light emitting device mounted in the flip manner emits light reflected from the second electrode layer 242 through the substrate 221, it can emit most of the light in the vertical direction. Light emitted from the side of the light emitting device may be reflected to the light emission area by a reflective member through an adhesive member according to an embodiment.

The third electrode layer 243 is disposed below the second electrode layer 242 and is electrically insulated from the first and second electrode layers 241 and 242. The third electrode layer 243 is made of metal, such as titanium (Ti), copper (Cu), nickel (Ni), gold (Au), chromium (Cr), tantalum (Ta), platinum (Pt), and tin (Sn). ), silver (Ag), and phosphorus (P). A first electrode 245 and a second electrode 247 are disposed below the third electrode layer 243.

The insulating layers 231 and 233 block unnecessary contact between the first and second electrode layers 241 and 242, the third electrode layer 243, the first and second electrodes 245 and 247, and the layers of the light emitting structure 225. The insulating layers 231 and 233 include first and second insulating layers 231 and 233, and the first insulating layer 231 is disposed between the third electrode layer 243 and the second electrode layer 242. The second insulating layer 233 is disposed between the third electrode layer 243 and the first and second electrodes 245 and 247.

The third electrode layer 243 is connected to the first conductive semiconductor layer 222. The connection portion 244 of the third electrode layer 243 protrudes as a via structure through the lower portion of the first and second electrode layers 241 and 242 and the light emitting structure 225 and contacts the first conductive semiconductor layer 222. do. The connection portions 244 may be arranged in plural numbers. A portion 232 of the first insulating layer 231 extends along the recess 226 of the light emitting structure 225 around the connection portion 244 of the third electrode layer 243, and the third electrode layer 243 and blocks the electrical connection between the first and second electrode layers 241 and 242, the second conductive semiconductor layer 224, and the active layer 223. An insulating layer may be disposed on the side of the light emitting structure 225 to protect the side, but this is not limited.

The second electrode 247 is disposed below the second insulating layer 233 and contacts at least one of the first and second electrode layers 241 and 242 through an open area of the second insulating layer 233. becomes or is connected. The first electrode 245 is disposed below the second insulating layer 233 and is connected to the third electrode layer 243 through an open area of the second insulating layer 233. Accordingly, the protrusion 248 of the second electrode 247 is electrically connected to the second conductive semiconductor layer 224 through the first and second electrode layers 241 and 242, and the protrusion 246 of the first electrode 245 ) is electrically connected to the first conductive semiconductor layer 222 through the third electrode layer 243.

FIG. 40 is a plan view of a vehicle equipped with a vehicle lamp to which a lighting module is applied according to an embodiment, and FIG. 41 is a diagram showing a vehicle lamp having a lighting module or lighting device disclosed in an embodiment.

40 and 41, in the vehicle 900, the tail light 800 includes a first lamp unit 812, a second lamp unit 814, a third lamp unit 816, and a housing 810. can do. Here, the first lamp unit 812 may be a light source to serve as a turn signal, the second lamp unit 814 may be a light source to serve as a sidelight, and the third lamp unit 816 may serve as a brake light. It may be a light source for use, but is not limited thereto. At least one or all of the first to third lamp units 812, 814, and 816 may include the lighting module disclosed in the embodiment. The housing 810 accommodates the first to third lamp units 812, 814, and 816, and may be made of a light-transmitting material. At this time, the housing 810 may have a curve depending on the design of the vehicle body, and the first to third lamp units 812, 814, and 816 may implement a surface light source that may have a curved surface depending on the shape of the housing 810. You can. These vehicle lamps can be applied to a vehicle's turn signal lamp when the lamp unit is applied to a vehicle's tail light, brake light, or turn signal lamp.

Here, at least one of a rotating plate having a lighting module according to the embodiment of FIGS. 27 to 38, a rotating plate having a light-emitting element, a fixed plate having a light-emitting element, or a housing having a reflective layer is used for the lamp unit 812, 814, and 816. It can be applied within. By arranging a lighting module or light-emitting device on the rotating plate or in the air path of the rotating plate, the sense of lighting for lighting can be maximized. Additionally, the heat dissipation effect of the lighting module can be improved due to the rotational force generated by the rotating plate.

Additionally, by arranging means for adjusting the number of rotations of the rotating plate proportionally or adaptively to the vehicle speed, the color dynamics of the lighting module can be changed depending on the vehicle speed. It can also provide dynamic vehicle ramps.

The features, structures, effects, etc. described in the embodiments above are included in at least one embodiment of the present invention and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. illustrated in each embodiment can be combined or modified and implemented in other embodiments by a person with ordinary knowledge in the field to which the embodiments belong. Therefore, contents related to such combinations and modifications should be construed as being included in the scope of the present invention.

In addition, although the above description has been made focusing on the examples, this is only an example and does not limit the present invention, and those skilled in the art will understand the above examples without departing from the essential characteristics of the present embodiment. You will be able to see that various modifications and applications are possible. For example, each component specifically shown in the examples can be modified and implemented. And these variations and differences in application should be construed as being included in the scope of the present invention as defined in the appended claims.

Claims (8)

rotating body;
a plurality of blades along the outer peripheral surface of the rotating body; and
It includes a first lighting module disposed on the surface of the rotating body or the front of the blade,
The first lighting module is,
A substrate attached to one side of the rotating body or the front of the blade;
a plurality of light emitting devices on the substrate;
A first resin layer disposed on the substrate and covering the plurality of light emitting devices, and
Comprising at least one upper resin layer on the first resin layer,
At least one of the first resin layer and the at least one upper resin layer includes a phosphor,
The at least one upper resin layer includes at least one of ink particles and a diffusion agent,
The at least one upper resin layer includes a diffusion layer and a second resin layer,
The second resin layer includes ink particles,
A lighting device wherein the second resin layer extends to a side of the first resin layer and is in contact with the upper surface of the substrate. rotating body;
a plurality of blades along the outer peripheral surface of the rotating body; and
It includes a first lighting module disposed on the surface of the rotating body or the front of the blade,
The first lighting module is,
A substrate attached to one side of the rotating body or the front of the blade;
a plurality of light emitting devices on the substrate;
A first resin layer covering the substrate light emitting device, and
Comprising at least one upper resin layer on the first resin layer,
At least one of the first resin layer and the at least one upper resin layer includes a phosphor,
wherein the at least one upper resin layer includes ink particles and a diffusion agent,
The first lighting module is disposed on the entire front surface of the blade,
A lighting device wherein the surface color of the first lighting module has the same color as the ink particles. According to paragraph 2,
The first lighting module is a lighting device including a plurality of lighting modules that emit different lights on front surfaces of different blades. According to any one of claims 1 to 3,
It includes a second lighting module disposed on the rear of the blade,
The first lighting module emits red light,
The second lighting module is a lighting device that emits yellow or blue light. According to any one of claims 1 to 3,
The first lighting module is a lighting device disposed along the outer peripheral surface of the rotating body. According to any one of claims 1 to 3,
The blade includes a thermally conductive material or a transparent material,
A lighting device wherein the rotating body includes a transparent material. According to paragraph 2,
The at least one upper resin layer includes at least one of a diffusion layer and a second resin layer,
The second resin layer includes ink particles,
A lighting device wherein the second resin layer extends to a side of the first resin layer and is in contact with the upper surface of the substrate. According to claim 1 or 7,
The second resin layer includes a phosphor,
The emission wavelength of the phosphor and the ink particle contain the same red color,
The content of phosphor in the second resin layer ranges from 12 wt% to 23 wt%,
A lighting device wherein the content of the ink particles in the second resin layer ranges from 3 wt% to 13 wt%.

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