Patent ID: 12255266

DETAILED DESCRIPTION

Hereinafter, with reference to the accompanying drawings will be described in detail preferred embodiments that may be easily carried out by the person of ordinary skill in the art. However, it should be understood that the configurations shown in the embodiments and drawings described in this specification are only preferred embodiments of the invention, and that there may be various equivalents and modifications that can replace them at the time of application.

In the detailed description of the operating principle for the preferred embodiment of the invention, when it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the subject matter of the invention, the detailed description will be omitted. Terms to be described later are terms defined in consideration of functions in the invention, and the meaning of each term should be interpreted based on the contents throughout the present specification. The same reference numerals are used for parts having similar functions and functions throughout the drawings.

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

Hereinafter, the embodiments will be apparent through the description of the accompanying drawings and embodiments. In the description of the embodiments, each layer (film), region, pattern or structure is formed “on” or “under” of the substrate, each layer (film), region, pad or patterns. In the case described as, “on” and “under” include both “directly” or “indirectly” formed through another layer. In addition, the criteria for the top or bottom of each layer will be described based on the drawings.

Lighting Module

FIG.1is a perspective view showing a lighting module according to an embodiment of the invention,FIG.2is a B-B side sectional view of the lighting module ofFIG.1,FIG.3is a C-C side sectional view of the lighting module ofFIG.1, andFIG.4is an example of a partial plan view of the lighting module ofFIG.1FIG.5is an example of light extraction of the lighting module ofFIG.1,FIG.6is an example of modifying the length of the lighting module ofFIG.1, andFIG.7is an exploded perspective view of the lighting module ofFIG.1.

FIGS.1to6, a lighting module200according to an embodiment of the invention includes one or a plurality of light emitting devices105, and may irradiate with the light emitted from the light emitting devices105to a surface light source having line shape. The light emitted from the light emitting device105may be emitted as a light source having a constant height in the vertical direction.

The lighting module200may include a substrate210, a resin layer220disposed on the substrate210, and a second reflective layer240disposed on the resin layer220. The lighting module200may include a first reflective layer230between the substrate210and the resin layer220.

As shown inFIGS.2and3, the lighting module200may have a length X1in the first direction X greater than a width Y1in the second direction Y. The lengths of the first and second directions X and Y may be greater than the thickness Z1or height of the vertical direction Z. The length X1in the first direction may vary depending on the number of arrangements of the light emitting devices105, for example, may be 30 mm or more. The width Y1in the second direction may be 16 mm or more. The width Y1of the second direction Y of the lighting module200may provide a region in which light emitted from the light emitting device105diffuses and a region protecting the rear of the light emitting device105. The lighting module200may be a flexible module or a rigid module. The lighting module200may be flat or flexible with respect to at least one of the first and second directions X and Y.

The lighting module200may include a front side surface S1facing the light emitting device105, a rear side surface S2opposite the front side surface S1, and a plurality of side surface S3and S4extending from both end portions of the front side surface S1and the rear side surface S2in the second direction. The rear side surface S2extends in the first direction X, and the front side surface S1faces the rear side surface S1and may include a curved surface. The length of the first direction X of the front side surface S1and the rear side surface S2may be greater than the height or thickness of the vertical direction. The maximum lengths of the first direction X of the front side surface S1and the rear side surface S2may be the same or different from each other. The height or thickness in the vertical direction of the front side surface S1and the rear side surface S2may be the same. The plurality of side surfaces S3and S4include a first side surface S3and a second side surface S4facing each other. The front side surface S1and the rear side surface S2may have a long length in the first direction X. The first side surface S3and the second side surface S4may face each other in a second direction Y perpendicular to the first direction X. The front side surface S1may face the exit surface111of the light emitting device105or may be a surface exposed in the second direction from the first ends of the first side surface S1and the second side surface S2. The rear side surface S2may face a rear side of the plurality of light emitting devices105or may be a surface exposed in the second direction from the second end portions of the first side surface S3and the second side surface S4. The first side surface S3and the second side surface S4may be a different side from the front side surface S1and the rear side surface S2. The rear side surface of the light emitting device105may be a surface opposite to the exit surface111.

Each the side surfaces S1, S2, S3, and S4of the lighting module200may be each side surface of the resin layer220having the thickest thickness in the lighting module200.

The plurality of light emitting devices105may be arranged in the first direction in the lighting module200. Two or more light emitting devices105may be disposed in the first direction, and may be, for example, n (n=2 or more). The plurality of light emitting devices105may be arranged on a straight line extending in the first direction X. The plurality of light emitting devices105may be arranged in one row. In another example, the plurality of light emitting devices may be arranged in two rows, and the two rows of light emitting devices may be arranged in a zigzag form. A front side or the exit surface of the light emitting device105may be exposed toward the second direction Y. The side surface or rear side of the light emitting device105may be a non-exit surface.

The plurality of light emitting devices105may face the front side surface S1. The exit surfaces111of the plurality of light emitting devices105may face the front side surface S1. The light emitted from the light emitting device105is emitted through the front side surface S1, and some light may be emitted through at least one of the rear side surface S2, the first side surface S3, and the second side surface S4. That is, most of the light emitted from the light emitting device105may be emitted through the front side surface S1.

As shown inFIG.4, the distance D2between the light emitting device105and the front side surface S1and the distance D3between the light emitting device105and the rear side surface S2based on the light emitting device105may be different from each other. The distance D3between the light emitting device105and the rear side surface S2may be 2 mm or more, for example, in a range of 2 mm to 20 mm. When the distance D3between the light emitting device105and the rear side surface S2is smaller than the above range, the region where moisture may penetrate or form a circuit pattern may be small, and when the distance D3is larger than the above range, a size of the lighting module200may increase. The distance D2is a maximum distance, may be 5 mm or more, and may range from 5 mm to 20 mm. When the distance D2is smaller than the above range, hot spots may be generated, and when the distance D2is larger than the above range, the module size may increase.

FIGS.1to3, the lighting module200may include a plurality of convex portions P0: P1, P2, and P3and at least one concave portion C1and C2. The plurality of convex portions P0: P1, P2, P3may be at least two or n (n=2 or more). The plurality of convex portions P0: P1, P2, and P3may be disposed in the first direction in which the plurality of light emitting devices105may be arranged, and may protrude convexly in the second direction orthogonal to the first direction. The plurality of convex portions P0: P1, P2, and P3may face the plurality of light emitting devices105. Each of the plurality of convex portions P0: P1, P2, and P3may protrude in a direction away from each of the light emitting devices105:101,102, and103. That is, the convex portions P0: P1, P2, and P3may have a distance from the light emitting device105as the region facing the center of the light emitting device105may be increase.

Each of the convex portions P0: P1, P2, and P3may protrude in the direction of the front side surface S1with respect to each of the light emitting devices105. The recesses C1and C2may be recessed toward the rear side surface S2with respect to the front side surface S1. The convex portions P1, P2, and P3may include convex curved surfaces. The concave portions C1and C2may include concave curved surfaces. The convex portions P1, P2and P3may have a first curvature, and the second concave portions C1and C2may have a second curvature having a radius smaller than the radius of the first curvature.

In the convex portions P0: P1, P2, and P3, the front side surface S1has a constant height, and the upper surface and the lower surface may be provided as horizontal planes. The front side surface S1may be provided as a vertical surface in the third direction Z. The rear side surface S2, the first side surface S3, and the second side surface S4may be provided as vertical surfaces in the third direction. The rear side surface S2may be arranged in a direction perpendicular to the first side surface S3and the second side surface S4. The third direction Z may be a direction orthogonal to the first and second directions X and Y. As another example, the front side surface S1may include a surface inclined with respect to the third direction Z. The front side surface S1, the rear side surface S2, the first side surface S3, and the second side surface S4may have the same thickness or the same height in the third direction Z.

The resin layer220may be disposed between the substrate210and the second reflective layer240. The resin layer220may be disposed between the upper surface of the substrate210and the lower surface of the second reflective layer240. The resin layer220includes the front side surface S1, the rear side surface S2, the first side surface S3, and the second side surface S4. The resin layer220may surround or embed the plurality of light emitting devices105disposed on the substrate210.

The lighting module200may include the first reflective layer230between the resin layer220and the substrate210. The resin layer220may be a transmissive layer. The resin layer220is a different material, and may include a glass material.

The plurality of light emitting devices105:101,102,103are, for example, a first light emitting device101adjacent to the first side surface S3, a third light emitting device103adjacent to the second side surface S4, and the at least one or two or more second light emitting devices102disposed between the first and third light emitting devices101and103. As described below, the number of the light emitting devices may be n (n is 2 or more), and for convenience of description, three light emitting devices will be described as an example.

The convex portions P1, P2, and P3may include a first convex portion P1corresponding to the first light emitting device101, a second convex portion P2corresponding to the second light emitting device102, and a third convex portion P3corresponding to the third light emitting device103. The concave portions C1and C2may include a first concave portion C1disposed between the first and the second convex portions P2and P3, and a second concave portion C2disposed between the second and third convex portions P2and P3. Each of the first to third convex portions P1, P2, and P3may face the exit surface111of each of the first to third light emitting devices101,102, and103.

The first convex portion P1overlaps with the first light emitting device101in the second direction Y, and the second convex portion P2overlaps with the second light emitting device102in the second direction Y, and the third convex portion P3may be overlapped with the third light emitting device103in the second direction Y. Each of the first to third convex portions P1, P2, and P3is disposed to overlap each of the first to third light emitting devices101,102, and103in the second direction, and may diffuse the light emitted from the exit surface111of the first to third light emitting devices101,102,103. To this end, the first to third convex portions P1, P2, and P3may overlap each exit surface111of the first to third light emitting devices101,102, and103in the second direction Y.

The first to third convex portions P1, P2, and P3may overlap in the first direction, and the first and second concave portions C1and C2may overlap in the first direction. Among the convex portions P0: P1, P2, and P3, a region overlapped with the light emitting devices105:101,102, and103in the second direction may be closer to a higher point of the convex portion P0than the concave portions C1, C2.

The first concave portion C1may overlap a region between the first and second light emitting devices101and102in the second direction, and the second concave portion C2may overlap a region between the second and third light emitting devices102and103in the second direction. The first and second recesses C1and C2may transmit or reflect some incident light. The first and second concave portions C1and C2may suppress the occurrence of dark portions in the region between the first to third light emitting devices101,102and103.

The substrate210includes a printed circuit board (PCB), for example, a resin-based printed circuit board (PCB), a metal core PCB, a flexible PCB, and a ceramic PCB, or FR-4 substrate. The substrate210may be a flexible or non-flexible material. A circuit pattern may be disposed on the substrate210. The circuit pattern of the substrate210may include a plurality of pads on a region corresponding to the light emitting device105.

Among the regions of the substrate210, a rear region based on the light emitting device105is a region opposite to a region where light is emitted, and may be a region in which a circuit patterns for connecting the light emitting devices105may be disposed. The width of the rear region may vary depending on the number of the light emitting devices105or the connection method of the light emitting devices105. The width of the rear region is the distance D3between the light emitting device105and the rear side surface S2, and may be provided in 2 mm or more. Accordingly, it is possible to suppress the penetration of moisture from the rear side of the light emitting device105and the circuit patterns for connecting the plurality of light emitting devices105may form.

The plurality of light emitting devices105may be provided with bonding portions thereunder and electrically connected to pads of the substrate210. The plurality of light emitting devices105may be connected in series by the circuit patterns of the substrate210. As another example, the plurality of light emitting devices105may be connected in parallel by circuit patterns of the substrate210, or two or more groups connected in series may be connected in parallel.

The light emitting device105may include a device having a light emitting chip or a package in which an LED chip is packaged. The light emitting chip may emit at least one of blue, red, green, and ultraviolet (UV) light. The light emitting device105may emit at least one of white, blue, red, and green. The light emitting device105emits light in a lateral direction and a bottom portion thereof may be disposed on the substrate210. The light emitting device105may be a side view type package. As another example, the light emitting device105may be an LED chip, and one surface of the LED chip may be opened and a reflective member may be disposed on the other surface.

The exit surface111of the light emitting device105may be disposed on a surface adjacent to the substrate210, for example, and may be disposed on a side surface adjacent to the upper surface of the substrate210. The exit surface111is disposed to the side surface between the bottom and the upper surface of the light emitting device105, and emits light in the second direction Y. The exit surface111of the light emitting device105may be a surface adjacent to the first reflective layer230and may be a perpendicular surface to the upper surface of the substrate210and the upper surface of the first reflective layer230.

The thickness of the light emitting device105may be smaller than the length of the first direction X of the light emitting device105. The thickness of the light emitting device105may be 3 mm or less, for example, 2 mm or less. The thickness of the light emitting device105may be in the range of 1 mm to 2 mm, for example, in the range of 1.2 mm to 1.8 mm.

The length of the light emitting device105in the first direction X may be greater than the thickness of the light emitting device105, for example, may be1.5times or more the thickness of the light emitting device105. Since the light emitting device105has a thin thickness and a long length in the first direction, the light exit angle in the first direction X in the left-right direction based on the center of the light emitting device105may be widely provided. Here, the light exit angle of the light emitting device105in the first direction X may be greater than the light exit angle of the third direction Z in the up-down direction. The light exit angle of the first direction of the light emitting device105may have a range of 110 degrees to 160 degrees. The length of the first direction X of the light emitting device105may be greater than the width of the second direction of the light emitting device105.

Here, as shown inFIG.2, the thickness Za of the substrate210may be smaller than the thickness of the light emitting device105. The thickness of the light emitting device105may be two or more times the thickness Za of the substrate210, for example, may range from 2 to 4 times. Since the thickness Za of the substrate210is provided thin, the lighting module200may be provided as a flexible plate.

As shown inFIGS.2to4, the resin layer220may be disposed on the substrate210. The first reflective layer230may be disposed between the resin layer220and the substrate210. The resin layer220may cover the light emitting device105. The resin layer220may contact the upper surface and side surfaces of the light emitting device105. The resin layer220may contact the upper surface of the first reflective layer230. A portion of the resin layer220may contact the substrate210through the first reflective layer230. The resin layer220may contact the exit surface111of the light emitting device105. The front side surface S1, the rear side surface S2, the first side surface S3and the second side surface S4of the resin layer220are side surfaces between the first and second reflective layers230and240. The front side surface S1, the rear side surface S2, the first side surface S3and the second side surface S4may be a periphery surfaces of the light emitting device105or surfaces corresponding to the side surfaces of the light emitting device105.

An area of the upper surface of the resin layer220may be the same as an area of the upper surface of the substrate210. The area of the upper surface of the resin layer220may be the same as an area of the upper surface of the first reflective layer230. The area of the upper surface of the resin layer220may be the same as the area of the upper surface of the second reflective layer240. The length X1of the resin layer220in the first direction may be the same as the length of the substrate210. The length X1of the resin layer220in the first direction may be the same as the length of the first reflective layer230. The length X1of the resin layer220in the first direction may be the same as the length of the second reflective layer240. The maximum width Y1of the resin layer220in the second direction may be the same as the maximum width of the substrate210. The maximum width Y1of the resin layer220in the second direction may be the same as the maximum width of the second reflective layer240. The minimum width of the resin layer220in the second direction may be the same as the minimum width of the substrate210. The minimum width of the resin layer220in the second direction may be the same as the minimum width of the first reflective layer230. The minimum width of the resin layer220in the second direction may be the same as the minimum width of the second reflective layer240. The maximum width in the second direction is the length between the peak of the convex portions P1, P2, and P3of the lighting module and the rear side surface S2, and the minimum width may be a length between the lower point of the concave portions C1and C2of the lighting module and the rear side surface S2.

The resin layer220may be disposed between the first and second reflective layers230and240. The first and second reflective layers230and240may have the same area and face each other on the lower surface and the upper surface of the resin layer220. Accordingly, the resin layer220may diffuse light emitted from the light emitting device105and light reflected by the first and second reflective layers230and240to guide the lateral direction.

The resin layer220may be formed to a thickness Zb greater than the thickness of the light emitting device105. Accordingly, the resin layer220may protect the upper portion of the light emitting device105and prevent moisture penetration. Since the substrate210is disposed under the light emitting device105and the resin layer220is disposed on the light emitting device105, the light emitting device105may be protected. Therefore, an interval between the upper surface of the resin layer220and the light emitting device105may be arranged in a range of 0.6 mm or less, for example, 0.5 mm to 0.6 mm. The upper portion of the resin layer220is disposed at the same thickness as the interval, thereby protecting the upper portion of the light emitting device105.

The thickness Zb of the resin layer220may be an interval between the upper surface and the lower surface of the resin layer220. The thickness Zb of the resin layer220may be a distance between the first and second reflective layers230and240. The thickness Zb may be equal to a distance (e.g., Zb) between the first and second reflective layers230and240. The thickness Zb may be smaller than the distance between the front side surface S1and the rear side surface S2. For example, the distance between the front side surface S1and the rear side surface S2may include the maximum width or the minimum width. The maximum width may be a straight line distance between the high point of the convex portions P1, P2, and P3and the rear side surface S2. The distance or interval between the first and second side surfaces S3and S4of the resin layer220may be greater than the distance between the high point of the convex portions P1, P2, and P3and the rear side surface S2. The minimum width may be a straight line distance between the bottom of the concave portions C1and C2and the rear side surface S2. The distance or interval between the first reflective layer230and the second reflective layer240may be smaller than the distance or interval between the front side surface S1and the rear side surface S2of the resin layer220. By arranging the distance between the first and second reflecting layers230and240smaller than the width Y1or the minimum width in the second direction of the lighting module200, a line-form surface light source is provided, and a brightness and hot spots may prevent. In addition, the lighting module may be provided with flexible characteristics that may be convex or concave in the third direction.

The thickness Zb of the resin layer220may be 2 times or less than the thickness of the light emitting device105, and may be, for example, more than 1 to 2 times. The thickness Zb of the resin layer220may be, for example, in the range of 1.5 mm to 1.9 mm or in the range of 1.6 mm to 1.8 mm. The thickness Zb of the resin layer220may be 0.8 times or less the thickness Z1of the lighting module200, for example, and may be in a range of 0.4 to 0.8 times the thickness Z1of the lighting module200. Since the thickness of the resin layer220is disposed at a difference of 1.2 mm or less from the thickness Z1of the lighting module200, a decrease in light efficiency in the lighting module200may prevent and the ductility characteristics may enhance.

The resin layer220may include a resin material such as silicone, silicone molding compound (SMC), epoxy, or epoxy molding compound (EMC). The resin layer220may optionally include an ultraviolet (UV) curable resin or a heat curable resin material, and PC, OPS, PMMA, PVC, and the like. For example, a resin material having a urethane acrylate oligomer as a main raw material may be used as the main material of the resin layer220. For example, a urethane acrylate oligomer which is a synthetic oligomer may be used by mixing with a polyacrylic polymer type. Of course, the low-boiling dilution type reactive monomers such as IBOA (isobornyl acrylate), HPA (Hydroxyl propyl acrylate, 2-HEA (2-hydroxyethyl acrylate), etc.) may further include a mixed monomer, and may be mixed a photo initiator (for example, 1-hydroxy cyclohexyl phenyl-ketone, etc.) or antioxidants as an additive.

A bead (not shown) may be included in the resin layer220, and the bead may diffuse and reflect incident light, thereby increasing the amount of light. The resin layer220may include a phosphor. The phosphor may include at least one of a yellow phosphor, a green phosphor, a blue phosphor, and a red phosphor.

The region where the convex portions P1, P2, and P3are formed in the resin layer220may be provided as a lens portion. The lens portion of the resin layer220is provided in a lens shape having a convex curved surface, and may include a hemispherical shape when viewed from a top view. The distance from the light emitting device105to the lens portion may be further spaced apart from the region of lens portion that corresponds to the center of the light emitting device105. The thickness of the lens portion in the third direction may be the thickness Zb of the resin layer220. Since the upper and lower surfaces of the lens portion are flat and curved surfaces are formed toward the front side surface S1, light incident in a direction of the front side surface S1may be diffused. The lens portion is disposed between the first and second reflective layers230and240which are flat on the upper and lower portions of the lens portions, so that light may be emitted by refracting light to the front side surface S1. The lens portion may refract light incident on a region outside the optical axis based on an optical axis at an exit angle greater than an incident angle.

In the resin layer220, the concave portions C1and C2disposed between the convex portions P1, P2and P3are provided as recesses recessed in a direction of the rear side surface S2, and the concave portions C1and C2may include a concave curved surface or a curved surface having an inflection point. The recesses of the resin layer220may be formed as a concave curved surface on the surface of the resin layer220to refract the incident light. The recesses of the concave portions C1and C2refract light emitted from the light emitting device105on the region between the lens portions, thereby suppressing the occurrence of dark portions.

Here, when the convex portions P1, P2and P3and the concave portions C1and C2are disposed on the resin layer220, the substrate210and the first and second reflective layers230and240has a shape corresponding to shapes of the convex portion and the concave portion. The convex portions P1, P2, and P3or the lens portion of the resin layer220may be the same as the number of the light emitting devices105.

The first reflective layer230may reflect light emitted from the light emitting device105. The first reflective layer230may be formed on the upper surface of the substrate210. The first reflective layer230may be formed as an upper layer of the substrate210or may be formed as a separate layer. The first reflective layer230may be adhered to the upper surface of the substrate210with an adhesive. The resin layer220may be adhered to the upper surface of the first reflective layer230.

The first reflective layer230is provided with a plurality of holes232in a region corresponding to the lower surface of the light emitting device105, and the light emitting device105may be connected to the substrate210through the hole232. A portion of the resin layer220may contact the substrate210through the hole232. The hole232may be a region where the light emitting device105is bonded to the substrate210.

The first reflective layer230may be formed in a single layer or multilayer structure. The first reflective layer230may include a material that reflects light, for example, a metal or non-metal material. When the first reflective layer230is a metal, the first reflective layer230may include a metal layer such as stainless, aluminum (Al), or silver (Ag). When the first reflective layer230is a non-metallic material, the first reflective layer230may include a white resin material or a plastic material. The first reflective layer230may include a white resin material or a polyester (PET) material. The first reflective layer230may include at least one of a low reflection film, a high reflection film, a diffuse reflection film, or a regular reflection film. The first reflective layer230may be provided as, for example, a regular reflection film for reflecting incident light to the front side surface S1.

The thickness Zc of the first reflective layer230may be smaller than the thickness Za of the substrate210. The thickness Zc of the first reflective layer230is disposed at least 0.5 times the thickness Za of the substrate210, thereby reducing transmission loss of incident light. The thickness Zc of the first reflective layer230may be in the range of 0.2 mm to 0.4 mm, and when it is smaller than the above range, light transmission loss may occur, and when it is thicker than the above range, the thickness Z1of the lighting module200may increase.

The second reflective layer240may be disposed on the resin layer220. The second reflective layer240may be adhered to the upper surface of the resin layer220. The second reflective layer240is disposed in the entire region of the upper surface of the resin layer220, thereby reducing light loss.

The second reflective layer240may be formed of the same material as the first reflective layer230. The second reflective layer240may have a material having a higher light reflectivity than the material of the first reflective layer230or a thicker thickness in order to reflect light and reduce light transmission loss. The second reflective layer240may be the same thickness as the first reflective layer230or a thicker thickness. For example, the first and second reflective layers230and240may be provided with the same material and the same thickness.

The thickness Zd of the second reflective layer240may be smaller than the thickness Za of the substrate210. The thickness Zd of the second reflective layer240is disposed at least 0.5 times the thickness Za of the substrate210, thereby reducing transmission loss of incident light. The thickness Zd of the second reflective layer240may be in the range of 0.2 mm to 0.4 mm, and when it is smaller than the above range, light transmission loss may occur, and when it is thicker than the above range, the thickness Z1of the lighting module200may increase.

The second reflective layer240may be formed in a single layer or multilayer structure. The second reflective layer240may include a material that reflects light, for example, a metal or non-metal material. When the second reflective layer240is a metal, the second reflective layer240may include a metal layer such as stainless, aluminum (Al), silver (Ag), and when the second reflective layer240is a non-metallic material, the second reflective layer240may include a white resin material or a plastic material. The second reflective layer240may include a white resin material or a polyester (PET) material. The second reflective layer240may include at least one of a low reflection film, a high reflection film, a diffuse reflection film, or a regular reflection film. The second reflective layer240may be provided as, for example, a regular reflection film so that incident light proceeds in a direction of the front side surface S1.

A stacked structure of the substrate210, the first reflective layer230, the resin layer220, and the second reflective layer240may include the convex portions P1, P2, P3and the concave portions C1and C2. An upper surface and a lower surface of the convex portions P1, P2, and P3have a flat shape, and may include a curved surface or a hemispherical shape in the first direction. The concave portions C1and C2may include the concave curved surface in a direction of the rear side surface S2.

The convex curved surface and the concave curved surface in the resin layer220may be formed as a haze surface to diffuse light. The haze surface may be treated as a rough surface than the inner surface of the resin layer220to diffuse the emitted light.

The lighting module200according to an embodiment of the invention may provide a thickness Z1in the third direction in a line form, thereby providing ductility and providing a line-shaped surface light source. The lighting module200may have a thickness Z1of 3 mm or less. That is, the lighting module200may be provided as a surface light source having a line shape of 3 mm or less. As another example, the lighting module200may be arranged to be 6 mm or less larger than 3 mm, in this case, the thickness of the lighting module200is increased, but the thickness of the resin layer220is provided thicker to increase the line width and the light distribution area may increase.

Referring toFIG.2, when the thickness of each component in the lighting module200, the thickness of the substrate210is Za, the thickness of the resin layer220is Zb, the thickness of the first reflective layer230is Zc and the thickness of the second reflective layer240is Zd, and there have the relationship of Zb>Za>Zd≥Zc. The interval between the upper surfaces of the second reflective layer240and the lower surface of the substrate210is the thickness Z1of the lighting module200. The thickness Zb is a ratio of 0.4 to 0.8 of Z1, the thickness Za is a ratio of 0.14 to 0.18 of Z1, and the thickness Zd or Zc may have a ratio of 0.08 to 0.12 of Z1. The Zb may have a ratio of 3.5 to 4 of Za. The Zb may have a ratio of 5.8 to 6.4 of Zc or Zd. The thickness Zb of the resin layer220is disposed to be thicker than the thickness Za of the substrate210, so that the light emitting device105may be protected and guided by diffusing light and strengthening ductility characteristics.

Referring toFIG.4, the maximum width W1of the convex portions P1, P2and P3in the first direction is a distance between the adjacent concave portions C1and C2, and may be equal to or smaller than the pitch G1of the light emitting devices105. When the maximum width W1of the convex portions P1, P2, and P3is greater than the pitch G1between the light emitting devices105, two or more light emitting devices on a region of the convex portions P1, P2, P3105may be arranged and may increase the luminosity. When the maximum width W1of the convex portions P1, P2, and P3is smaller than the pitch G1between the light emitting devices105, the size of the convex portions P1, P2, and P3becomes small, and the light may provide in a uniform distribution, but the luminous intensity may be reduced.

The maximum width W1of the convex portions P1, P2, and P3may be 15 mm or more, for example, in a range of 15 mm to 20 mm. The maximum width W1of the convex portions P1, P2, and P3may be larger than the depth D4of the concave portions C1and C2. The ratio of the maximum width W1of the convex portions P1, P2, and P3and the depth D4of the concave portions C1, C2may range from 1:0.4 to 1:0.7. When the depths of the concave portions C1and C2are smaller than the above range, the dark region may be increased between adjacent convex portions P1, P2and P3. When the depths of the concave portions C1and C2are greater than the above ranges, the light interference between the light emitting devices105may increase by proceeding to a region adjacent to the light emitting devices105. The depth D4of the concave portions C1and C2may be a straight-line distance from a straight line connecting the peaks of the convex portions P1, P2and P3to the lower points of the concave portions C1and C2.

The curved surfaces of the convex portions P1, P2and P3and the curved surfaces of the concave portions C1and C2may have curvature. The radius of curvature of the convex portions P1, P2, and P3may be 8 mm or more, for example, 8 mm to 14 mm or 9 mm to 11 mm. When the radius of curvature of the convex portions P1, P2, and P3is smaller than the above range, the improvement of luminous intensity is minimal, and when it is larger than the above range, a dark portion may be generated.

The radius of curvature of the concave portions C1and C2may be ⅛ times smaller than the radius of curvature of the convex portions P1, P2, and P3. The ratio of the radius of curvature of the concave portions C1and C2and the radius of curvature of the convex portions P1, P2and P3may range from 1:8 to 1:28. When the radius of curvature of the concave portions C1and C2is smaller than the above range, the amount of light emitted through the concave portions C1and C2may be reduced to increase the dark portion, and when it is larger than the range, the convex portions P1and P2, P3may be reduced in size, and optical interference between the light emitting devices105may occur. Accordingly, the depths D4and the radius of curvature of the concave portions C1and C2take into account the position of the light emitting device105and an angle of beam spread of the light emitting device105, and may range the improvement of light uniformity by the recesses C1and C2and the convex portions P1, P2, and P3and the suppression of dark portion by the recesses C1and C2. The radius of curvature of the concave portions C1and C2may range from 0.5 to 1 mm. Since the concave portions C1and C2have a predetermined curvature and are provided in a curved shape, the incident light may be refracted and transmitted, thereby reducing the occurrence of dark portions in the concave portions C1and C2.

The region between the peak of the convex portions P1, P2, and P3and the light emitting device105is a region for diffusing light and emitting it with a uniform light distribution, which may be defined as a light diffusion region or a light guide region. The interval between the peak of the convex portions P1, P2, and P3and the light emitting device105may range of 13 mm or more, for example, may range from 13 mm to 20 mm. The interval between the peak of the convex portions P1, P2, and P3and the light emitting device105may be provided in a uniform distribution through light diffusion when in the range, and when the interval between the convex portions P1, P2and P3and the light emitting device105is smaller than the above range, a hot spot may be generated, and when it is larger than the above range, the luminous intensity may decrease and the size of the module may increase. The interval between the convex portions P1, P2, P3and the light emitting device105may be larger than the radius of curvature of the convex portions P1, P2, and P3, for example, and may be in a range of 1.3 times or more or 1.3 to 2.0 times of the radius of curvature of the convex portions P1, P2, and P3.

The interval D1between the concave portions C1and C2and the straight lines connecting the light emitting devices105may be smaller than the depth D4of the concave portions C1and C2. The interval D1may be 5 mm or more, for example, in a range of 5 mm to 12 mm, and when it is smaller than the interval D1, the depth D4of the concave portions C1and C2is deepened or a distance D2between the light emitting device105and the convex portions P1, P2, and P3may be narrowed, and a dark portion may be generated in the concave portions C1, C2or a hot spot may be generated in the convex portions P1, P2, and P3.

Referring toFIG.5, among the light emitted from the light emitting device105, the light L1traveling in the optical axis direction passes through the center of the convex portions P1, P2, and P3, and the light L2emitted around the optical axis is emitted at an exit angle greater than the incident angle, thereby diffusing light. In addition, the light L3incident on the concave portions C1and C2is refracted and transmitted or reflected and emitted by the convex portions P1, P2and P3, thereby reducing the occurrence of dark portions on the concave portions C1and C2. That is, as shown inFIG.37, in the lighting module according to the embodiment of the invention, the dark region Rb is smaller than the bright region Ra in the emitted luminous intensity distribution as shown in (a), and may have a distribution of the equiluminance curve of light as shown in (b).FIG.38is a structure having a flat front side surface without a convex portion and a concave portion in a lighting module according to an embodiment of the invention, and may be provided as a module as shown inFIG.15, in a luminous intensity distribution, a dark region Rb becomes greater than a bright region Ra, and has an equiluminance curve distribution as in (b).

Referring toFIG.6, an angle R0between the center of the light emitting device105and the low point of the concave portion C0based on a straight line passing through the center of the light emitting device105and the center of the convex portion P0may range from 50 degrees or more, for example, in a range from 50 degrees to 80 degrees. The concave portion C0is spaced apart from the angle R0to receive light from the light emitting device105and refract it to emit the light. The convex portion P0and the concave portion C0may include convex portions P1, P2, and P3and the concave portions C1, C2disclosed inFIGS.1to5.

FIG.7is an exploded perspective view of a lighting module according to an embodiment of the invention, andFIGS.8to13are views illustrating a manufacturing process of the lighting module according to an embodiment of the invention. In describing the lighting module, the same parts as the above configuration will be referred to the above description.

Referring toFIGS.7and8, two or more light emitting devices105may be arranged on the substrate210in the first direction. The light emitting devices105to be disposed on the substrate210may be arranged to emit light toward the front side surface or in a front direction. As another example, the light emitting devices105on the substrate210are arranged in one column, but may be arranged in two columns, but are not limited thereto.

Referring toFIGS.7and9, a first reflective layer230prepared in advance is attached to the substrate210. A hole232into which the light emitting device105is to be inserted may be formed in the first reflective layer230. The first reflective layer230is disposed around the light emitting device105and is attached to the substrate210to reflect light emitted from the light emitting device105. The first reflective layer230may not be formed when a resist material of a reflective material is disposed on the substrate210, but is not limited thereto. The first reflective layer230has thinner thickness than the thickness of the light emitting device105and may be disposed below the exit surface of the light emitting device105. The first reflective layer230may be a plastic material, or a metal or non-metal material.

Referring toFIGS.7and10, a resin layer220is formed on the first reflective layer230. The resin layer220may be molded on the first reflective layer230and the light emitting device105. The resin layer220may be formed to a thickness capable of covering the light emitting device105. The resin layer220may be formed of a transparent resin material, for example, a material such as silicone, silicone molding compound, epoxy or epoxy molding compound, UV curable resin or heat curable resin.

The resin layer220may be provided with a thickness that is thicker than the thickness of the light emitting device105, and may be arranged to be twice or less, for example, 1.5 times or less, the thickness of the light emitting device105. The resin layer220may be formed by a dispensing process.

Referring toFIGS.7and11, a second reflective layer240is formed on the upper surface of the resin layer220before the resin layer220is cured. The second reflective layer240may cover the entire upper surface of the resin layer220. The second reflective layer240may be attached using an adhesive after the resin layer220is cured as another example.

Referring toFIGS.7and12, when the second reflective layer240is formed, structures from the substrate210to the second reflective layer240are cut using cutting equipment, as shown inFIGS.1,12and13. Here, the cutting equipment may be cut with a router, and a convex portions P0and a concave portions P0of the lighting module may be formed during the cutting.

Accordingly, in the lighting module, the front side surface S1of the resin layer220and the front side surface S1of the substrate210may be disposed on the same vertical plane. In addition, the resin layer220may be disposed on the same vertical plane as the front side surface S1, the first reflective layer230, and the second reflective layer240. Each of the rear side surface S2, the first side surface S3, and the second side surface S4of the resin layer220may be disposed on the same vertical plane as the rear side surface, the first side surface, and the second side of the substrate210, respectively. Each of the rear side surface S2, the first side surface S3, and the second side surface S4of the resin layer220may be disposed on a perpendicular plane such as the rear side, the first side surface and the second side surface of the first and second reflective layers230and240.

Accordingly, as shown inFIGS.7,12, and13, the light emitted from the light emitting device105may be emitted through the front side surface S1of the resin layer220. Some light reflected from the inside may be emitted to the rear side surface S2, the first side surface S3, and the second side surface S4of the resin layer220.

FIG.14is another example of the lighting module of the invention. As illustrated inFIG.14, the first reflective layer230may be spaced apart from the edge of the substrate210and a portion222of the resin layer220may contact an upper surface of the edge side of the substrate210. When the resin layer220is in contact with the edge of the substrate210, moisture penetration may be suppressed.

As another example, in the lighting module as shown inFIGS.2and14, a third reflective layer245may be further disposed on the surfaces S2, S3, and S4excluding the front side surface S1among the side surfaces of the resin layer220. The third reflective layer245may prevent leakage of light and increase the amount of light extracted to the front side surface S1. The third reflective layer245may be a material of the first and second reflective layers230and240disclosed above. The third reflective layer245may contact or be spaced apart from the side surface of the resin layer220.

In the following description, it has a stacked structure of the lighting modules as shown inFIGS.3and7, and is a configuration in which the above-described configurations are partially changed in consideration of a variable of luminous intensity degradation in the lighting modules. In the following description, the changed parts of each configuration will be mainly described, and the above configuration may be selectively applied.

FIG.15is a structure in which the lighting module disclosed above provides a flat front side surface S1without convex portions and concave portions. The lighting module may be stacked in the structure ofFIG.7. The luminous intensity in the horizontal and vertical directions of the lighting module as shown inFIG.15may be lowered, and the dark portion may be larger than the bright portion as shown inFIG.38without convex portions and concave portions. In this case, a diffusion agent may be added in the resin layer to prevent hot spots or provide a longer light guiding distance.

FIGS.16to19are examples of changing the curvature of the convex portion in the lighting module according to the embodiment of the invention. The lighting module201aofFIG.16has a radius of curvature of 5±0.5 mm of the convex portion Pa1corresponding to the light emitting device105, and in this case, the luminance intensity in the horizontal and vertical directions may be 7.5 cd or less. In this case, the region Pb2between the convex portion Pa1and the convex portion Pa1is provided in a large region with a flat surface, and thus there is a limit in improving the luminance intensity.

FIGS.17to19are structures in which the radius of curvature of the convex portions Pb1, Pc1, and Pd1corresponding to the light emitting device105in the lighting module201bof the invention is gradually increased.FIG.17has a radius of curvature of the convex portion Pb1in the range of 8 mm to 11 mm,FIG.18has a radius of curvature of the convex portion Pc1in the range of 11 mm to 14 mm, andFIG.19has a radius of curvature of the convex portion Pd1in the range of 15 mm to It is in the range of 21 mm. At this time, it may be seen that in the structures as shown inFIGS.17and18, the luminance intensity in the horizontal and vertical directions is 8.5 cd or more, and inFIG.19, the luminance intensity in the horizontal and vertical directions is reduced to 7.5 cd or more and 8.2 cd again. Therefore, when the lighting module of the invention provides a luminance intensity of 7.5 cd or more, the radius of curvature described above may be selectively applied. When the light module has the best luminance intensity, the radius of curvature of the convex portions Pb1, Pc1, and Pd1may be provided in a range of 8 mm to 14 mm, and the concave portions Pb2, Pc2, and Pd2in the region between the convex portions Pb1, Pc1, and Pd1due to the radius of curvature of the convex portions Pb1, Pc1, and Pd1may be provided without a curve or have a radius of curvature of 0.5 mm to 1 mm. The convex portions Pb1, Pc1, Pd1and concave portions Pb2, Pc2, and Pd2of the lighting module are alternately arranged, since the convex portion P overlaps the light emitting device105in the second direction and may be extracted by diffusing the light incident and the concave portions Pb2, Pc2, and Pd2may be extracted by refracting the light incident, the luminous intensity of the line-shaped surface light source may improve and hot spots may prevent. Here, the luminous intensity was measured under the condition that the distance between the light emitting device105and the front side surface S1is 13 mm, and the air gap between the lighting module and the inner lens is 11 mm.

FIGS.20to34are examples of modifying the shape of the front side surface S1in the lighting module of the invention. In this modification, when the convex portion and the concave portion disclosed above have a curvature, the luminous intensity may be lower than the luminous intensity in the horizontal and vertical directions.

As shown inFIG.20, a convex portion Pa3and a concave portion Pa4are alternately disposed on the front side surface S1of the lighting module202a, and the convex portion Pa3is disposed to overlap the light emitting device105, and the concave portion Pa4disposed between the convex portions Pa3may have a predetermined curvature. The convex portion Pa3has a convex curved surface and may be provided as a recess having a concave curved surface as it corresponds to the center of the light emitting device105.

As shown inFIG.21, the convex portion Pb3and the concave portion Pb4are alternately disposed on the front side surface S1of the lighting module202b, and the convex portion Pb3is disposed to overlap the light emitting device105, and the concave portion Pb4between the convex portions Pb3may have a flat surface. The convex portions Pb3has a convex curved surface and may be provided as a recess having a concave curved surface as it corresponds to the center of the light emitting device105. The flat surface (or low point) of the concave portion Pb4may be disposed in a region between the light emitting devices105.

As shown inFIG.22, a convex portion Pc3and a concave portion Pc4are alternately arranged on the front side surface S1of the lighting module202c, and the convex portion Pc3has a maximum width smaller than the length of the light emitting device105in the first direction. Accordingly, two or more convex portions Pc3overlapping the light emitting device105may be arranged. The concave portion Pc4is disposed between the convex portions Pc3, and the concave portion Pc4may be a curved surface having a negative curvature or a structure having an inflection point or an interface. The convex portion Pc3may be spaced apart from the light emitting device105by 13 mm or more. In this case, since the size of the convex portion Pc3is arranged with a micro lens, a uniform distribution of light may be provided, but a decrease in the luminous intensity may occur.

FIGS.23to25, convex portions Pd3, Pe3, and Pf3and concave portions Pd4, Pe4, and Pf4are alternately disposed on the front side surface S1of the lighting module202d, and the convex portions Pd3, Pe3, and Pf3may protrude in a triangular shape, for example, a right-angled triangular shape, at the lower point of the recesses Pd4, Pe4, and Pf4. The low point of the concave portions Pd4, Pe4, and Pf4may correspond to an edge portion outside of the exit surface of the light emitting device105. The convex portions Pd3, Pe3, and Pf3may provide an inclined surface between adjacent light emitting devices105, and a portion corresponding to the low point of the concave portions Pd4, Pe4, and Pf4may be provided in a perpendicular surface to the low point.FIG.23shows a flat surface with the inclined surface of the convex portion Pd3, the high point portion of the convex portion Pd3shows an angled surface, andFIG.24shows a high point portion of the convex portion Ped3having a curved surface, andFIG.25may show to arrange as a micro lens on the inclined surface of the convex portion Pf3. InFIGS.23to25, since light is transmitted along the inclined directions of the convex portions Pd3, Pe3, and Pf3, the distribution of the equiluminance curve around the light emitting device105may be formed long along the inclined direction.

FIGS.26to28are other examples of lighting modules.

Referring toFIG.26, the lighting module202ghas convex portions Pg3and concave portions Pg4alternately arranged on the front side surface S1, and the convex portions Pg3overlap the light emitting devices105and has a curved surface, and the concave portion Pg4has a low point located between the light emitting devices105. In such a structure, it is possible to provide a wide distribution of the equiluminance curve.

Referring toFIG.27, the lighting module202hhas a convex portion Ph3and a concave portion Ph4alternately arranged on the front side surface S1, and the concave portion Ph4has a polygonal shape and corresponds to the light emitting device105, and the convex portion Ph3may protrude in a region between the light emitting devices105. In such a structure, it is possible to provide a wide distribution of the equiluminance curve.

Referring toFIG.28, the lighting module202ihas convex portions Pi3and concave portions Pi4alternately arranged on the front side surface S1, and the convex portions Pi3is disposed to correspond to the light emitting devices105. The concave portion Pi3may correspond to a region between the light emitting devices105. The convex portion Pi3and the concave portion Pi4may have a curved surface and be provided in a sine wave shape. In such a structure, it is possible to provide a wide distribution of the equiluminance curve.

Referring toFIG.29, the lighting module202jhas convex portions Pj3and concave portions Pj4alternately arranged on the front side surface S1, and the convex portions Pj3have convex curved surfaces and may be smaller than the width of a concave curved surface of concave portion Pj4or radius of curvature of the concave curved surface of Pj4. One or more of the concave portions Pj4may be disposed to correspond to the light emitting device105, and thus provided in the form of a concave micro-lens, thereby providing a wide distribution of the equiluminance curve.

Referring toFIG.30, the lighting module202kis provided with a convex portion Pk3and a concave portion Pk4alternately arranged on the front side surface S1, and the convex portion Pk3is provided on a flat surface and correspond to the light emitting device105, the concave portion Pk4may correspond to a region between the light emitting devices105and has a trapezoidal shape. The width of the concave portion Pk4may be gradually narrowed as the depth increases. Since the concave portion Pk4is provided with an inclined side surface, it is possible to refract the incident light.

Referring toFIG.31, the lighting module202lmay be provided differently from the structure ofFIG.20. The lighting module202lhas a structure in which the depth of the concave portion Pl4between the convex portions Pl3is deeper, and the low point of the concave portion Pl4may be disposed deeper than a rear side surfaces of the light emitting devices105. In this case, some light traveling toward the rear side surface of the light emitting device105may be refracted and extracted to the front side surface S1.

InFIGS.32to34, the lighting modules202m,202n, and202oare arranged in convex portions Pm3, Pn3, Po3having a triangular shape and concave portions Pm4, Pn4, Po4having a triangular shape, andFIG.32is located between concave portions Pm4between the light emitting devices105, the high point portion of the convex portion Pm3may be formed in an angled surface to correspond to the center of the light emitting device105, andFIG.33shows a curved surface formed such that the high point of a convex portion Pn4inFIG.32corresponds to the center of the light emitting device105, andFIG.34shows an angled surface or curved surface formed such that the low point of the concave portion Po4corresponds to the center of the light emitting device105. The high point of the convex portion Po3corresponds to the region between the light emitting devices105and may be an angled surface or a curved surface. In the structures as shown inFIGS.32and34, the distribution of the equiluminance curve may be widened, and in the case ofFIG.33, the luminous intensity may be improved.

FIGS.35and36show a case in which the distances D11and D12between the high point of the light emitting device105and the convex portion in the lighting module of the invention are different from those ofFIG.4. In this case, the convex portion P0and the concave portion C0may have the curvature disclosed inFIG.4.

The lighting module203ofFIG.35is a case in which the distance D11between the high point of the light emitting device105and the convex portion P0is 4 to 6 mm, and a distance D12between the light emitting device105and the high point of the convex portion P0inFIG.36ranges of 13 mm to 21 mm, the luminous intensity in the horizontal and vertical directions is high rather than the structure ofFIG.35, but the luminous intensity may be low. In the structure ofFIG.35, a light spot may be short, so hot spots may be generated.

In addition, according to an embodiment of the invention, when the thickness of the resin layer220is thick, for example, when the thickness of the resin layer220is provided, the light emitting area is increased due to an increase in the thickness of the resin layer220, thereby improving light distribution.

Lighting module according to an embodiment of the invention may be applied to the lamp as shown inFIG.39. The lamp is an example of a vehicle lamp, such as a head lamp, a car width lamp, a side mirror light, a fog light, a tail lamp, a brake light, a daytime running light, a vehicle interior light, a door scar, a rear combination lamp, or applicable to backup lamps.

Referring toFIG.39, the lamp may be coupled to the lighting module200disclosed above inside the housing503having an inner lens502. The thickness of the lighting module200is such that it may be inserted into the inner width of the housing503. The width Z3of the exit portion515of the inner lens502may be equal to or less than twice the thickness of the lighting module200, and thus, it is possible to prevent a decrease in the luminous intensity.

The inner lens502may be spaced a predetermined distance, for example, 10 mm or more from the front side surface of the lighting module200. An outer lens501may be disposed on the exit side surface of the inner lens502. The lamp having the lighting module200is an example, and may be applied in a structure having ductility to other lamps, for example, a curved or curved structure when viewed from the side surface.

FIG.40is a plan view showing an example of a light emitting device applied to a lighting module according to an embodiment of the invention,FIG.41is an example of a module in which the light emitting device ofFIG.40is disposed on a circuit board, andFIG.42is another side surface ofFIG.41as viewed from the other side.

Referring toFIG.40, the light emitting device100includes a body10having a cavity20, a plurality of lead frames30and40in the cavity20, and one or a plurality of light emitting chips71disposed on at least one of the plurality of lead frames30and40. The light emitting device100is an example of the light emitting device disclosed in the above embodiment and may be implemented as a side-view type light emitting package.

The light emitting device100may have a length in the first direction of three times or more, for example, four times or more than the width of the second direction. The length of the first direction may be 2.5 mm or more, for example, in a range of 2.7 mm to 4.5 mm. The light emitting device100may provide a long length in the first direction, thereby reducing the number of light emitting devices100in the first direction. The light emitting device100may provide a relatively thin thickness, thereby reducing the thickness of the lighting module having the light emitting device100. The thickness of the light emitting device100may be 2 mm or less. The body10is provided with the cavity20and the length of the body10in the first direction may be three times or more compared to the thickness T1of the body10, thereby widening the angle of beam spread of light in the first direction.

The lead frames30and40are disposed on the bottom of the cavity20of the body10. For example, a first lead frame30and a second lead frame40are coupled to the body10.

The body10may be formed of an insulating material. The body10may be formed of a reflective material. The body10may be formed of a material having a reflectance higher than a transmittance with respect to a wavelength emitted from the light emitting chip71, for example, a material having a reflectance of 70% or more. In the case in which the reflectance is 70% or more, the body10may be defined as a non-transparent material or a reflective material. The body10may be formed of a resin-based insulating material, for example, a resin material such as Polyphthalamide (PPA). The body10may be formed of a thermosetting resin including a silicone-based, epoxy-based, or plastic material, or a material having high heat resistance and high light resistance. The body10includes a white-based resin. In the body10, an acid anhydride, an antioxidant, a release agent, a light reflector, inorganic filler, a curing catalyst, a light stabilizer, a lubricant, and titanium dioxide may be selectively added. The body10may be formed of at least one selected from the group consisting of an epoxy resin, a modified epoxy resin, a silicone resin, a modified silicone resin, an acrylic resin, and a urethane resin. For example, an epoxy resin composed of triglycidyl isocyanurate, hydrogenated bisphenol A diglycidyl ether, etc. and an acid anhydride composed of hexahydrophthalic anhydride, 3-methylhexahydrophthalic anhydride, 4-methylhexahydrophthalic anhydride, etc. are added with 1 ,8-diazabicyclo (5,4,0) undecene-7 (DBU) as a curing agent, ethylene glycol as a co-catalyst, titanium oxide pigment, and glass fiber in the epoxy resin, and thus, a solid epoxy resin composition which is partially cured by heating and B stated may be used but the present invention is not limited thereto. The body10may be formed by suitably mixing at least one selected from the group consisting of a dispersant, a pigment, a fluorescent material, a reflective material, a light shielding material, a light stabilizer, and a lubricant in a thermosetting resin.

The body10may include a reflective material, such as a resin material in which a metal oxide is added, and the metal oxide may include at least one of TiO2, SiO2, and Al2O3. Such a body10may effectively reflect incident light. As another example, the body10may be formed of a resin material having a translucent resin material or a phosphor material converting a wavelength of incident light.

The front portion15of the body10may be a surface on which the cavity20is disposed, or may be a surface on which light is emitted. The rear portion of the body10may be an opposite side of the front portion15.

The first lead frame30includes a first lead portion31disposed at the bottom of the cavity20, a first bonding portion32disposed on a first outer regions11A and11C of the first side portion11of the body10, and a first heat radiating portion33disposed on the third side portion13of the body10. The first bonding portion32is bent from the first lead portion31disposed in the body10and protrudes to the first side portion11, and the first heat radiating portion33may be bent from the first bonding portion32. The first outer regions11A and11C of the first side portion11may be a region adjacent to the third side portion13of the body10.

The second lead frame40includes a second lead portion41disposed on the bottom of the cavity20, a second bonding portion42disposed on second outer regions11B and11D of the first side portion11of the body10, and a second heat radiating portion43disposed on the fourth side portion14of the body10. The second bonding portion42is bent from the second lead portion41disposed in the body10and the second heat radiating portion43may be bent from the second bonding portion42. The second outer regions11B and11D of the first side portion11may be a region adjacent to the fourth side portion14of the body10.

A gap portion17between the first and second lead portions31and41may be formed of a material of the body10and may be the same horizontal surface with the bottom of the cavity20or may protrude, but the invention is not limited thereto. The first outer regions11A and11C and the second outer regions11B and11D has an inclined regions11A and11B and a flat regions11C and11D. The first and second bonding portions32and42of the first and second lead frames30and40may protrude through the inclined regions11A and11B, but the invention is not limited thereto.

Here, the light emitting chip71may be disposed on, for example, the first lead portion31of the first lead frame30. The light emitting chip71may be connected to the first and second lead parts31and41by wires72and73, or the light emitting chip71may be adhesively connected to the first lead part31and connected to the second lead part41by wire. The light emitting chip71may be a horizontal chip, a vertical chip, or a chip having a via-structure. The light emitting chip71may be mounted in a flip chip manner. The light emitting chip71may selectively emit light within a wavelength range of an ultraviolet ray to a visible ray. The light emitting chip71may emit ultraviolet light or a blue peak wavelength, for example. The light emitting chip71may include at least one of Group II-VI compounds and Group III-V compounds. The light emitting chip71may be formed of a compound selected from the group consisting of GaN, AlGaN, InGaN, AlInGaN, GaP, AlN, GaAs, AlGaAs, InP and mixtures thereof. The light emitting chip71may be disposed in the cavity20in one or more. The plurality of light emitting chips71may be disposed on at least one of the first lead frame30and the second lead frame40.

In an inner side of the cavity20, first, second, third and fourth inner sides21,22,23and24disposed around the cavity20may be inclined with respect to a horizontal straight line of an upper surface of the lead frames30and40. A first inner side21adjacent to the first side portion11and a second inner side22adjacent to the second side portion12is inclined at an angle to the bottom of the cavity20, and a third inner side23adjacent to the third side portion13and a fourth inner side24adjacent to the fourth side portion14may be inclined at an angle smaller than the inclination angle of the first and second inner sides21and22. Accordingly, the first and second inner sides21and22reflect the progress of the incident light toward the first axis direction Y, and the third and fourth inner sides23and24may diffuse the incident light in the second axis direction X.

The inner side surfaces21,22,23and24of the cavity20may have a stepped region vertically stepped from the front side portion15of the body10. The stepped region may be disposed to be stepped between the front side portion15of the body10and the inner sides21,22,23and24. The stepped region may control the directivity characteristic of the light emitted through the cavity20.

The light emitting chip71disposed in the cavity20of the light emitting device100according to the embodiment may be arranged in one or a plurality. The light emitting chip71may be selected from, for example, a red LED chip, a blue LED chip, a green LED chip, and a yellow green LED chip.

A molding member81is disposed in the cavity20of the body11as shown inFIG.42, and the molding member81includes a light-transmitting resin such as silicone or epoxy, and may be formed in a single layer or multiple layers.. A phosphor for changing a wavelength of light emitted on the molding member81or the light emitting chip71may be included, and the phosphor excites and emits a portion of the light emitted from the light emitting chip71to obtain a different wavelength. The phosphor may be selectively formed from quantum dots, YAG, TAG, Silicate, Nitride, and Oxy-nitride-based materials. The phosphor may include at least one of a red phosphor, a yellow phosphor, and a green phosphor, but is not limited thereto. The surface of the molding member81may be formed in a flat shape, a concave shape, a convex shape, etc., but is not limited thereto. As another example, a light-transmitting film having a phosphor may be disposed on the cavity20, but is not limited thereto.

A lens may be further formed on the upper portion of the body10, and the lens may include a concave or convex lens structure, and may control light distribution of light emitted by the light emitting device100.

A semiconductor device such as a light receiving device or a protection device may be mounted on the body10or any one of the lead frames, and the protection device may be implemented as a thyristor, a Zener diode, or a TVS (Transient Voltage Suppression), and the Zener diode protects the light emitting chip71from electrostatic discharge (ESD).

Referring toFIGS.41and42, at least one or a plurality of light emitting devices100are disposed on a substrate210, and a first reflective layer230is disposed around a lower portion of the light emitting devices100. The light emitting device100may be applied to the lighting module disclosed above as an example of the light emitting device disclosed in the embodiment.

The first and second lead portions33and43of the light emitting device100are bonded to the electrode patterns213and215of the substrate210with solder or conductive tape, which are conductive adhesive members217and219.

The characteristics, structures and effects described in the above-described embodiments are included in at least one embodiment but are not limited to one embodiment. Furthermore, the characteristic, structure, and effect illustrated in each embodiment may be combined or modified for other embodiments by a person skilled in the art. Thus, it would be construed that contents related to such a combination and such a modified example are included in the scope of the invention.

In addition, embodiments are mostly described above. However, they are only examples and do not limit the invention. A person skilled in the art may appreciate that several variations and applications not presented above may be made without departing from the essential characteristics of the embodiments. For example, each component particularly represented in the embodiments may be varied. In addition, it should be construed that differences related to such a variation and such an application are included in the scope of the invention defined in the following claims.

An embodiment of the invention provides a lighting module that irradiates light emitted from a plurality of light emitting devices with a light source having a line shape or a surface light source.

An embodiment of the invention provides a lighting module in which a resin layer having a light emitting device is disposed between plurality of reflective layers.

An embodiment of the invention provides a lighting module for irradiating a side light source having a line shape or a surface light source and a lighting apparatus having the same.

An embodiment of the invention may provide a light unit having a lighting module, a liquid crystal display device, and a vehicle lamp.

A lighting module according to an embodiment of the invention comprises: a substrate; a light emitting device disposed on the substrate; a first reflective layer disposed on the substrate; a resin layer disposed on the first reflective layer; and a second reflective layer disposed on the resin layer, wherein the resin layer includes a front side surface through which light generated from the light emitting device is emitted, and the front side surface of the resin layer may include a plurality of convex portions and a plurality of concave portions.

According to an embodiment of the invention, a plurality of light emitting devices are disposed on the substrate, the resin layer is disposed to surround the light emitting device, and the resin layer include a rear side surface facing the front side surface, and a first side surface and a second side surface opposite to each other and connecting the front side surface and the rear side surface, wherein a distance between the first reflective layer and the second reflective layer is less than a distance between the front side surface and the rear side surface of the resin layer, the convex portion of the front side surface may be protruded convexly toward the front side surface from the light emitting device, and the concave portion of the front side surface may be recessed in a direction of the rear side surface between the plurality of convex portions.

According to an embodiment of the invention, the first reflective layer may have a hole which the plurality of light emitting devices are penetrated.

According to an embodiment of the invention, the distance between the first and second side surfaces of the resin layer may be greater than the distance between the high point of the convex portion and the rear side surface.

According to an embodiment of the invention, the front side surface, the rear side surface, the first side surface, and the second side surface of the resin layer are surfaces between the first and second reflective layers, and the resin layer emits light having a constant height through the front side surface.

According to an embodiment of the invention, the convex portion may include a lens portion having a curved surface convex in a direction of the front side surface of the resin layer.

According to an embodiment of the invention, the lens portion have a maximum distance from the light emitting device as the region facing the center of the light emitting device.

According to an embodiment of the invention, the thickness of the lens portion may be an interval between the first and second reflective layers or the thickness of the resin layer.

According to an embodiment of the invention, the thickness of the resin layer may be 2 times or less of the thickness of the light emitting device.

According to an embodiment of the invention, each of the plurality of convex portions faces to each of the plurality of light emitting devices, the concave portion faces to a region between the plurality of light emitting devices, and an exit surface of the light emitting device may be disposed to face the convex portion.

According to an embodiment of the invention, the plurality of convex portions include first and second convex portions, and the plurality of light emitting devices include first and second light emitting devices arranged in a first direction, and in a second direction toward the front side surface from the rear side surface of the resin layer, the first convex portion may overlap the first light emitting device and the second convex portion may overlap the second light emitting device.

According to an embodiment of the invention, the concave portion has a concave curved surface in a direction of the rear side surface between the first and second convex portions and may correspond to a region between the first and second light emitting devices.

According to an embodiment of the invention, light emitted from the plurality of light emitting devices is totally reflected by the first and second reflective layers, and may be emitted through the front side surface.

According to an embodiment of the invention, the first and second reflective layers may have a shape corresponding to a shape of the convex portion and the concave portion disposed on the front side surface of the resin layer.

According to an embodiment of the invention, the substrate may have a shape corresponding to the shape of the convex portion and the concave portion disposed on the front side surface of the resin layer.

According to an embodiment of the invention, comprising a third reflective layer disposed on the rear side surface, the first side surface and the second side surface of the resin layer may include.

According to an embodiment of the invention, the number of convex portions of the resin layer may be the same as the number of the light emitting devices.

According to an embodiment of the invention, the first reflective layer may contact the lower surface of the resin layer, and the second reflective layer may contact the upper surface of the resin layer.

A lighting module according to an embodiment of the invention comprises: a substrate; a plurality of light emitting devices disposed on the substrate; a first reflective layer disposed on the substrate; a resin layer disposed on the first reflective layer; and a second reflective layer disposed on the resin layer, wherein the resin layer includes a front side surface through which light generated from the plurality of light emitting devices is emitted, and the front side surface of the resin layer includes a plurality of convex portions and a plurality of concave portions. The plurality of convex portions and the plurality of concave portions have the same height, and the plurality of light emitting devices include a first light emitting device, a second light emitting device and a third light emitting device disposed between the first light emitting device and the second light emitting device, and the plurality of convex portions may include a first convex portion facing the first light emitting device, a second convex portion facing the second light emitting device, and a third a third convex portion facing the third light emitting device.

According to an embodiment of the invention, the luminous intensity of the light source may improve.

According to an embodiment of the invention, a surface light source having a line shape may provide.

According to an embodiment of the invention, it is possible to reduce the process of the lighting module.

According to an embodiment of the invention, light efficiency may be improved by reducing light loss.

According to an exemplary embodiment of the invention, since a light module of a thin thickness is provided in the form of a line light source, design freedom may be increased.

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

It is possible to improve the optical reliability of the lighting module and the lighting device having the same according to an embodiment of the invention.

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

Embodiments of the invention may be applied to a light unit having a lighting module, various types of display devices, surface light source lighting devices, vehicle lamps.

Any reference in this specification to “one embodiment,” “an embodiment,” “example embodiment,” etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the purview of one skilled in the art to effect such feature, structure, or characteristic in connection with other ones of the embodiments.

Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art.