KR101979723B1 - Illuminating device - Google Patents

Illuminating device Download PDF

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Publication number
KR101979723B1
KR101979723B1 KR1020120065263A KR20120065263A KR101979723B1 KR 101979723 B1 KR101979723 B1 KR 101979723B1 KR 1020120065263 A KR1020120065263 A KR 1020120065263A KR 20120065263 A KR20120065263 A KR 20120065263A KR 101979723 B1 KR101979723 B1 KR 101979723B1
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KR
South Korea
Prior art keywords
light source
portion
light
upper surface
side
Prior art date
Application number
KR1020120065263A
Other languages
Korean (ko)
Other versions
KR20130142034A (en
Inventor
김철홍
박무룡
박광호
Original Assignee
엘지이노텍 주식회사
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Application filed by 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Priority to KR1020120065263A priority Critical patent/KR101979723B1/en
Priority claimed from JP2013110628A external-priority patent/JP6192987B2/en
Publication of KR20130142034A publication Critical patent/KR20130142034A/en
Application granted granted Critical
Publication of KR101979723B1 publication Critical patent/KR101979723B1/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/61Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using light guides
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/68Details of reflectors forming part of the light source
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/69Details of refractors forming part of the light source
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00Globes; Bowls; Cover glasses
    • F21V3/04Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • F21V7/22Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/24Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

Abstract

The present invention relates to a lighting apparatus, comprising: at least one light source disposed on a printed circuit board, a resin layer disposed on the printed circuit board to embed the light source, and formed between the printed circuit board and the resin layer and formed therein. A light source module including a reflection unit having an air area in the air; An indirect light emitting unit formed on at least one of the one side and the other side of the light source module and reflecting light emitted from the light source; A diffusion plate having an upper surface formed on the light source module and a sidewall formed integrally with the upper surface and extending in a downward direction and in close contact with an outer surface of the indirect light emitting part; It includes, to provide a lighting device having a structure in which a first air gap is formed between the light source module and the upper surface of the diffuser plate to ensure the flexibility of the product itself, while improving the brightness while implementing indirect light emission using the flare effect Will have an effect.

Description

Lighting device {ILLUMINATING DEVICE}

The present invention relates to the field of lighting devices.

LED (Light Emitted Diode) is a device that converts an electric signal into infrared or light by using compound semiconductor characteristics, and unlike fluorescent lamps, it does not use harmful substances such as mercury, and causes less environmental pollution. It has the advantage of long life. In addition, it has a low power consumption compared to the conventional light source, and because of the high color temperature has excellent visibility and less glare.

Therefore, the current lighting apparatus has been developed from the conventional light source such as incandescent lamps or fluorescent lamps to the light source using the above-described LED element as a light source, in particular, as disclosed in Korean Patent Publication No. 10-2012-0009209 There is provided an illumination device that performs a surface emitting function.

In the above-described conventional lighting apparatus, a flat light guide plate is disposed on a substrate, and a side surface of the light guide plate has a structure in which a plurality of side type LEDs are arranged in an array form. The light guide plate is a kind of plastic molded lens that performs a function of supplying uniform light to the light emitted from the LED. Therefore, such a light guide plate is used as an essential component in a conventional lighting device. Due to the thickness of the light guide plate itself, there is a limit to reducing the thickness of the entire product, and because the material of the light guide plate itself is inflexible, it is difficult to apply to the bent portion, and thus, product design and design modification are not easy. Was implicated.

In addition, as the light is emitted to the side of the light guide plate, there is a problem that light loss occurs due to light loss, and the characteristics of the LED (for example, brightness and wavelength change) change as the temperature of the LED increases during light emission. There was also a problem.

Publication No. 10-2012-0009209

The present invention has been proposed to solve the above-described problems, and can provide a lighting device capable of thinning, improving the degree of freedom in product design, improving heat dissipation efficiency, and suppressing wavelength shift and brightness reduction. For that purpose.

In addition, an object of the present invention is to form a reflection unit having an air region on a printed circuit board to improve the light reflectance to maximize the brightness of the lighting device without the addition of a light source.

In addition, an object of the present invention is to differentiate the design of the lighting device without additional light source by implementing an indirect light emitting unit using the lost light.

The lighting apparatus of the present invention for solving the above problems, the light source module including a printed circuit board, a light source disposed on the printed circuit board and a resin layer disposed on the printed circuit board; An indirect light emitting part disposed on at least one of the one side and the other side of the light source module and reflecting light emitted from the light source; And a diffusion plate integrally formed with the upper surface and the upper surface disposed on the light source module and including a sidewall extending downward from an end of the upper surface. The indirect light emitting unit includes a light reflection member disposed on any one of the one side and the other side of the light source module, and an indirect light emitting air gap disposed between the light reflection member and the light source module. A reflection unit disposed between the printed circuit board and the resin layer, wherein the reflection unit comprises: a first reflection sheet disposed on an upper surface of the printed circuit board; A second reflective sheet of transparent material spaced apart from the first reflective sheet; And an air region and a spacer disposed between the first reflecting sheet and the second reflecting sheet, wherein the plurality of light sources pass through the first reflecting sheet and the second reflecting sheet and pass through the printed circuit. Electrically connected to a substrate, wherein a portion of the light source is disposed between the first reflecting sheet and the second reflecting sheet, and a portion of the light source irradiates light between the first reflecting sheet and the second reflecting sheet; do.

In the lighting apparatus of the present invention, the printed circuit board may be made of a flexible printed circuit board.

In the lighting apparatus of the present invention, the thickness of the first air gap may be formed in the range of more than 0 and 30mm or less.

In the lighting apparatus of the present invention, the reflection unit, the first reflection sheet in close contact with the surface of the printed circuit board; A second reflective sheet of transparent material spaced apart from the first reflective sheet to form the air region; It may include.

In the lighting apparatus of the present invention, the reflecting unit may further include a spacer formed between the first reflecting sheet and the second reflecting sheet to separate the first reflecting sheet and the second reflecting sheet. have.

In the lighting apparatus of the present invention, the spacer member may include at least one unit spacer member formed of an adhesive material having a cavity formed therein and forming a first air portion.

In the lighting apparatus of the present invention, the spacer member may be formed of at least one of a thermosetting PSA, a thermosetting adhesive, and a UV curing PSA type material.

In the lighting apparatus of the present invention, a plurality of unit spacers are spaced apart from each other in the spacer member, a second air portion may be formed in a space that is spaced apart from each other.

In the lighting apparatus of the present invention, the first reflective sheet may include a first substrate laminated on the base substrate and a metal layer laminated on the first substrate.

In the lighting apparatus of the present invention, the first reflective sheet may be made of white polyethylen terephthalate (PET) or Ag film.

In the lighting apparatus of the present invention, the reflection unit may further include a reflection pattern formed on the surface of the second reflection sheet.

In the lighting apparatus of the present invention, the reflective pattern may include any one of TiO 2 , CaCO 3 , BaSO 4 , Al 2 O 3 , Silicon, and polystyrene (PS).

In the lighting apparatus of the present invention, the indirect light emitting portion, the light reflection member formed on at least one of the one side and the other side of the light source module; An indirect light-emitting air gap formed between the light source module and the light reflection member; It may include.

In the lighting apparatus of the present invention, the light reflection member may be formed on the inner side surface of the side wall of the diffusion plate.

In the lighting apparatus of the present invention, the thickness of the indirect light-emitting air gap may be formed in the range of more than 0 and 20 mm or less.

In the lighting apparatus of the present invention, the light reflecting member may be formed including a white pigment or a metal.

In the lighting device of the present invention, the resin layer, urethane acrylate (Urethane Acrylate), epoxy acrylate (Epoxy Acrylate), polyester acrylate (Polyester Acrylate), polyether acrylate (Polyether Acrylate), polybutadiene acrylic It may be made of an ultraviolet curable resin including at least one of polybutadiene acrylate and silicon acrylate.

In the lighting apparatus of the present invention, the resin layer may be made of a thermosetting resin containing at least one of a polyester polyol resin, an acrylic polyol resin, a hydrocarbon-based or ester-based solvent. .

In the lighting device of the present invention, the resin layer, silicon (silica), silica (silica), glass bubble (glass bubble), PMMA, urethane (urethane), Zn, Zr, Al 2 O 3 , acrylic (acryl) It may further include a diffusion material for diffusing light composed of at least one selected from among.

In the lighting apparatus of the present invention, the refractive index of the resin layer may be formed in the range of 1.4 to 1.8.

In the lighting apparatus of the present invention, the thickness of the diffusion plate may be formed in the range of 0.5 to 5mm.

In the lighting apparatus of the present invention, the light source module may further include a first optical sheet formed on the resin layer and dispersing light emitted from the resin layer.

In the lighting apparatus of the present invention, the light source module may further include an optical pattern formed on the first optical sheet and blocking or reflecting the light emitted from the resin layer.

In the lighting apparatus of the present invention, the light source module may further include a second optical sheet disposed on the first optical sheet.

In the lighting apparatus of the present invention, the light source module may further include an adhesive layer formed between the first optical sheet and the second optical sheet, and an air gap may be further formed on the adhesive layer.

In the lighting apparatus of the present invention, the light source may be formed of a side view type light emitting device package.

In the lighting apparatus of the present invention, the light source, the package body having a cavity; A first lead frame including one end exposed to the cavity and the other end penetrating through the package body and exposed to one surface of the package body; A second lead frame including an end exposed to one side of the one surface of the package body, the other end exposed to the other side of the one surface of the package body, and an intermediate portion exposed to the cavity; The light source package may include a first semiconductor layer, an active layer, a second semiconductor layer, and at least one light emitting chip disposed on the first lead frame.

In the lighting apparatus of the present invention, the middle portion of the second lead frame may electrically connect the one end and the other end of the second lead frame to each other.

In the lighting apparatus of the present invention, the first lead frame, the first upper surface portion exposed to the cavity; It may include a first side portion that is bent from the first side of the first upper surface portion, and exposed to the one surface of the package body.

In the lighting apparatus of the present invention, one or more first through holes may be formed in at least one of the first upper surface portion or the first side surface portion.

In the lighting apparatus of the present invention, the first lead frame may include at least one first through hole formed adjacent to a boundary portion of the first upper surface portion and the first side surface portion.

In the lighting apparatus of the present invention, the at least one first through hole may be filled with a portion of the package body.

In the lighting apparatus of the present invention, the first lead frame includes connecting portions connecting the first upper surface portion and the first side portion to each other, wherein the first through hole is positioned between the connecting portions, and the connecting portion The length of at least one of these may be different from the others.

In the lighting apparatus of the present invention, the at least one light emitting chip may be disposed on the first upper surface portion.

In the lighting apparatus of the present invention, the length of the first direction of the first connection portion aligned with the light emitting chip among the connection portions is greater than the length of the first direction of the second connection portion unaligned with the light emitting chip, The first direction may be an x-axis direction in an xyz coordinate system.

In the lighting apparatus of the present invention, at least one of the connection portions may be formed with a second through hole having a diameter smaller than that of the first through hole.

In the lighting apparatus of the present invention, the second lead frame includes: a second upper surface portion disposed around at least one side of the first upper surface portion and exposed to the cavity of the package body; And a second side portion bent from the second upper surface portion and exposed to each of the one side and the other side of the one surface of the package body.

In the lighting apparatus of the present invention, the second side portion of the first upper surface portion may be provided with at least one groove portion, and the first side portion and the second side portion of the first upper surface portion may be sides facing each other.

In the lighting apparatus of the present invention, the second upper surface portion may be formed with at least one protrusion corresponding to the groove portion.

In the lighting apparatus of the present invention, the second upper surface portion may include first to third portions disposed corresponding to the remaining portions except for the first side portion of the first upper surface portion.

In the lighting apparatus of the present invention, the second side surface portion, the first portion bent from the first portion of the second upper surface portion; And a second portion that is bent from the third portion of the second upper surface portion, wherein the first portion and the second portion may be symmetrical with respect to the first side portion.

In the lighting apparatus of the present invention, the first side portion may be divided into an upper end including the connecting parts, and a lower end positioned below the upper end, and the lower end may protrude laterally from the upper end.

In the lighting apparatus of the present invention, the ratio of the length in the first direction of the second connection portion and the first connection portion may be 1: 1.2 to 1.8.

In the lighting apparatus of the present invention, the ratio of the length in the first direction of the first through hole and the length in the first direction of the upper end of the first side portion is 1: 3.8 to 6.3, and the first direction is in the xyz coordinate system. It may be in the x-axis direction.

In the lighting apparatus of the present invention, the length of the first through hole in the second direction may be 0.19 mm to 0.29 mm.

In the lighting apparatus of the present invention, the light emitting chip comprises: a first electrode layer disposed on the first semiconductor layer; A reflective layer disposed under the second semiconductor layer; And a second electrode layer disposed below the reflective layer.

In the lighting apparatus of the present invention, the light emitting chip may be a device for emitting red light having a wavelength range of 600nm to 690nm.

In the lighting apparatus of the present invention, the light source module is disposed on the flexible printed circuit board, and may further include at least one connector for electrical connection with the outside.

In the lighting apparatus of the present invention, the flexible printed circuit board may further include a fastening fixing part for fastening with the outside.

According to the present invention, the indirect light emitting unit including the light reflecting member has an advantage of realizing various lighting effects using a flare phenomenon and an effect of realizing various designs of lighting.

In addition, according to the present invention to implement the lighting effect using the light emitted to the resin layer side, there is an advantage that can implement a double lighting effect without adding a separate light source.

In addition, according to the present invention, the reflection unit having an air region on the surface of the printed circuit board is provided to maximize the brightness and improve the reflectivity of the light, and to increase the brightness without increasing the thickness of the lighting device or the number of light sources and air Due to the pattern design of the spacer (spacer) forming the area, there is also an effect to maximize the control and reflection effect of the light.

In addition, according to the present invention by removing the light guide plate to guide the light using the resin layer, it is possible to reduce the number of light emitting device packages, it is possible to reduce the overall thickness of the lighting device.

In addition, according to the present invention, the resin layer may be formed of a high heat resistant resin, and thus, an effect of realizing stable luminance and providing a reliable lighting device despite the heat generated in the light emitting device package may be provided.

In addition, according to the present invention, it is possible to secure flexibility by forming a lighting device using a flexible printed circuit board and a resin layer has the effect of increasing the degree of freedom of product design.

In addition, according to the present invention, by allowing the diffusion plate itself to surround the side of the light source module, the diffusion plate itself can perform the housing function at the same time, the effect of improving the manufacturing process efficiency and the product itself by not using a separate structure It has the effect of improving the durability and reliability. In addition, according to the present invention, it is possible to improve heat dissipation efficiency, and to suppress wavelength shift and luminous intensity decrease.

1 shows a lighting apparatus according to an embodiment of the present invention.
FIG. 2 shows a first embodiment of the light source module shown in FIG. 1.
3 and 4 illustrate an embodiment of the spacer constituting the reflection unit described above with reference to FIG. 2.
5 to 19 illustrate second to sixteenth embodiments of the light source module illustrated in FIG. 1.
20 illustrates an embodiment of the reflective pattern illustrated in FIG. 1.
FIG. 21 is a plan view illustrating a seventeenth embodiment of the light source module illustrated in FIG. 1.
FIG. 22 is a sectional view taken along the AA ′ direction of the light source module shown in FIG. 21.
FIG. 23 is a sectional view taken along the BB ′ direction of the light source module shown in FIG. 21.
FIG. 24 is a sectional view taken along the direction CC ′ of the light source module illustrated in FIG. 21.
25 shows a head lamp for a vehicle according to an embodiment of the present invention.
26 is a perspective view of a light emitting device package according to an embodiment of the present invention.
27 is a top view of a light emitting device package according to an embodiment of the present invention.
28 is a front view of a light emitting device package according to an embodiment of the present invention.
29 is a side view of a light emitting device package according to an embodiment of the present invention.
30 is a perspective view of the first lead frame and the second lead frame shown in FIG. 26.
FIG. 31 is a diagram for describing dimensions of respective portions of the first lead frame and the second lead frame shown in FIG. 30.
FIG. 32 shows an enlarged view of the connecting parts shown in FIG. 31.
33 to 38 illustrate modified embodiments of the first lead frame and the second lead frame.
39 is a perspective view of a light emitting device package according to another embodiment of the present invention.
40 is a top view of the light emitting device package illustrated in FIG. 39.
FIG. 41 is a front view of the light emitting device package shown in FIG. 39.
FIG. 42 is a cross-sectional view of the cd direction of the light emitting device package illustrated in FIG. 39.
FIG. 43 illustrates a first lead frame and a second lead frame shown in FIG. 39.
44 is a view illustrating a measurement temperature of a light emitting device package according to an embodiment of the present invention.
45 illustrates an embodiment of the light emitting chip illustrated in FIG. 26.
46 illustrates a lighting device according to another embodiment.
Fig. 47 shows a general vehicle headlamp which is a point light source.
48 is a view illustrating a tail light for a vehicle according to an embodiment of the present invention.
49 shows a general vehicle tail light.
50A and 50B illustrate light emitting device package intervals of a light source module used in a tail light for a vehicle according to an exemplary embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it is to be understood that the embodiments shown in the specification and the drawings shown in the drawings are only exemplary embodiments of the present invention, and that various equivalents and modifications may be substituted for them at the time of the present application. In addition, in describing the operating principle of the preferred embodiment of the present invention in detail, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. The following terms are terms defined in consideration of functions in the present invention, and the meaning of each term should be interpreted based on the contents throughout the present specification. The same reference numerals are used for parts having similar functions and functions throughout the drawings.

The present invention relates to a lighting apparatus, which removes the light guide plate and replaces it with a resin layer, but forms an indirect light emitting unit on the side of the resin layer, thereby implementing various lighting effects using a light leakage effect and improving the overall thickness of the lighting apparatus. It is an object of the present invention to provide a lighting device structure that can reduce the number of light sources while ensuring flexibility while reducing innovation.

In addition, the lighting device according to the present invention can be applied to various lamp devices, such as a vehicle lamp, home lighting device, industrial lighting device that requires lighting. For example, when applied to a vehicle lamp, it is also applicable to headlights, vehicle interior lighting, doorscar, rear lights and the like. In addition, the lighting apparatus of the present invention can be applied to the field of the backlight unit applied to the liquid crystal display device, and can be applied to all the lighting related fields that are currently developed and commercialized or can be implemented according to future technology development.

Hereinafter, the light source module refers to the components except for the diffusion plate and the indirect light emitting unit.

1 shows a lighting device 1 according to an embodiment of the present invention. Referring to FIG. 1, the lighting apparatus 1 may include a light source module 100 that is a surface light source, and further include a housing 150 that accommodates the light source module 100.

The light source module 100 may include at least one light source 20 for generating light, and the light source 20 may be formed of a light emitting device package including a light emitting chip. The light source module 100 may implement a surface light source by diffusing and dispersing light generated from the light source 20, which is a point light source, and may be bent due to its flexibility.

The housing 150 may protect the light source module 100 from impact and may be made of a material (eg, acrylic) through which light emitted from the light source module 100 may be transmitted. In addition, the housing 150 may include a curved portion in terms of design, and since the light source module 100 has flexibility, it may be easily accommodated in the curved housing 150. Of course, the housing 150 itself has a certain flexibility, it is also possible that the assembly structure itself of the entire lighting device 1 has a certain flexibility.

FIG. 2 illustrates a first embodiment 100-1 of the light source module illustrated in FIG. 1, and more specifically, illustrates a cross-sectional view in the AB direction of the lighting apparatus illustrated in FIG. 1. Referring to FIG. 2, the light source module 100-1 may include a resin layer 40 that functions as a flexible printed circuit board 10, a light source 20, and a light guide plate. And a reflection unit 30 formed between the printed circuit board 10 and the resin layer 40 and penetrated by the light source 20. The indirect light emitting unit P is formed on at least one of one side and the other side of the resin layer 40, and the diffusion plate 70 is formed on the light source module 100-1 described above.

The printed circuit board 10 may be a printed circuit board using a flexible insulating board, that is, a flexible printed circuit board 10.

For example, the flexible printed circuit board 10 may include a base member (eg, 5) and a circuit pattern (eg, 6, 7) disposed on at least one surface of the base member (eg, 5), and the base member (eg, , 5) may be a film having flexibility and insulation, such as polyimide or epoxy (eg FR-4).

More specifically, the flexible printed circuit board 10 may include an insulating film 5 (eg, polyimide or FR-4), a first copper foil pattern 6, a second copper foil pattern 7, and a via contact 8. ) May be included. The first copper foil pattern 6 is formed on one surface (for example, the upper surface) of the insulating film 5, the second copper foil pattern 7 is formed on the other surface (for example, the lower surface) of the insulating film 5, and is insulating The first copper foil pattern 6 and the second copper foil pattern 7 may be connected through the via contact 8 formed through the film 5.

Hereinafter, the case in which the printed circuit board 10 includes the flexible printed circuit board as described above will be described as an example, and the terms printed circuit board and flexible printed circuit board will be used interchangeably, but this is only one example. The substrate can be used as the printed circuit board 10 of the present invention.

The light source 20 is disposed on the flexible printed circuit board 10 in one or more numbers, and emits light. For example, the light source 20 may be a side view type light emitting device package disposed so that the emitted light travels in the direction 3 toward the side of the resin layer 40. In this case, the light emitting chip mounted on the light emitting device package may be a vertical light emitting chip, for example, a red light emitting chip illustrated in FIG. 45, but embodiments are not limited thereto.

The resin layer 40 is disposed above the flexible printed circuit board 10 and the light source 20 to fill the light source 20, and is emitted from the light source 20 in the lateral direction 3 of the resin layer 40. The light may be diffused and induced in a direction toward one surface (eg, the upper surface) of the resin layer 40.

The resin layer 40 may be made of a resin that can diffuse light, and the refractive index may be formed in the range of 1.4 to 1.8, but is not limited thereto.

For example, the resin layer 40 may be made of a high heat resistant ultraviolet curable resin including an oligomer. At this time, the content of the oligomer may be made of 40 to 50 parts by weight. In addition, as the UV curing resin, urethane acrylate (Urethane Acrylate) may be used, but is not limited thereto. In addition, epoxy acrylate (Polyester Acrylate), polyester acrylate (Polyester Acrylate), polyether acrylate (Polyether Acrylate), At least one material of polybutadiene acrylate (Polybutadiene Acrylate) and silicon acrylate (Silicon Acrylate) may be used.

In particular, when using an urethane acrylate (Urethane Acrylate) as the oligomer, by using a mixture of two types of urethane acrylate (Urethane Acrylate) it is possible to implement different physical properties at the same time.

For example, in the process of synthesizing urethane acrylate (Isocyanate) isocyanate (Isocyanate) is used, the physical properties of the urethane acrylate (Urethane Acrylate) (is yellowing, weather resistance, chemical resistance, etc.) is determined by the isocyanate. At this time, any one type of urethane acrylate (Urethane Acrylate) is implemented with Urethane Acrylate type-Isocyanate, but the NCO% of isophorone diisocyanate (PDI) or isophorone diisocyanate (IPDI) is 37% (hereinafter referred to as 'first oligomer' Implement another type of urethane acrylate (Urethane Acrylate) as Urethane Acrylate type-Isocyanate, so that NCO% of PDI (isophorone diisocyanate) or IPDI (isophorone diisocyanate) is 30-50% or 25-35% (Hereinafter, 'second oligomer') to form an oligomer according to the embodiment. According to this, the first oligomer and the second oligomer having different physical properties can be obtained according to NCO% control, and the oligomer constituting the resin layer 40 can be obtained by mixing them. At this time, the weight ratio of the first oligomer in the oligomer is 15 to 20, the weight ratio of the second oligomer may be implemented in the range of 25 to 35.

Meanwhile, the resin layer 40 may further include at least one of a monomer and a photo initiator. In this case, the content of the monomer may be 65 to 90 parts by weight, more specifically 35 to 45 parts by weight of IBOA (isobornyl acrylate), 10 to 15 parts by weight of 2-HEMA (2-Hydroxyethyl methacrylate), and 2-HBA (2-Hydroxybutyl). Acrylate) may be made of a mixture containing 15 to 20 parts by weight. In addition, in the case of a photoinitiator (eg, 1-hydroxycyclohexyl phenyl-ketone, Diphenyl), Diphwnyl (2,4,6-trimethylbenzoyl phosphine oxide, etc.) may be composed of 0.5 to 1 parts by weight.

In addition, the resin layer 40 may be made of a thermosetting resin having high heat resistance. Specifically, the resin layer 40 may be made of a thermosetting resin including at least one of a polyester polyol resin, an acrylic polyol resin, a hydrocarbon-based and / or ester-based solvent. The thermosetting resin may further include a thermosetting agent to improve the coating film strength.

In the case of a polyester polyol resin, the content of the polyester polyol resin may be 9 to 30% of the total weight of the thermosetting resin. In addition, in the case of the acrylic polyol (Acryl Polyol) resin, the content of the acrylic polyol may be made 20 to 40% of the total weight of the thermosetting resin.

In the case of a hydrocarbon-based or ester-based solvent, the content thereof may be 30 to 70% of the total weight of the thermosetting resin. In the case of a thermosetting agent, the content of the thermosetting resin may be 1 to 10% of the total weight. When the resin layer 40 is formed of the above materials, the heat resistance is enhanced, so that the luminance deterioration due to heat can be minimized even when used in a lighting device that emits high temperature heat, thereby providing a reliable lighting device. have.

In addition, according to the present invention, the thickness of the resin layer 40 can be innovatively reduced by using the material as described above for realizing the surface light source, thereby realizing thinning of the whole product. In addition, according to the present invention, the illumination device is formed by using a flexible printed circuit board and a resin layer made of a flexible material, and can be easily applied to a curved surface to improve the degree of freedom of design, and to other flexible displays. There are advantages that can be applied and applied.

The resin layer 40 may include a diffusion material 41 having a hollow (or void) formed therein, and the diffusion material 41 may be mixed or diffused with the resin forming the resin layer 40. It may serve to improve the reflection and diffusion characteristics of light.

For example, the light emitted from the light source 20 into the resin layer 40 is reflected and transmitted by the hollow of the diffusing material 41 so that the light is diffused and condensed in the resin layer 40. Light may be emitted to one surface (eg, the upper surface) of the resin layer 40. In this case, the reflectance and the diffusion rate of the light are increased by the diffusion material 41 to improve the light quantity and uniformity of the emitted light supplied to the upper surface of the resin layer 40, and consequently to improve the brightness of the light source module 100-1. Can be.

The content of the diffusing material 41 may be appropriately adjusted to obtain the desired light diffusing effect. Specifically, it may be adjusted in the range of 0.01 to 0.3% by weight of the total resin layer 40, but is not limited thereto. The diffusion material 41 may be formed of any one selected from silicon, silica, glass bubble, PMMA, urethane, Zn, Zr, Al 2 O 3, and acrylic. The particle diameter of the diffusion material 41 may be 1 μm to 20 μm, but is not limited thereto.

The reflective unit 30 may be formed between the flexible printed circuit board 10 and the resin layer 40, and the reflective pattern 31 may be further formed on the reflective unit 30. The reflecting unit 30 and the reflecting pattern 31 serve to improve the reflectance of the light emitted from the light source 20, and more details will be described later with reference to FIGS. 3 and 4.

An indirect light emitting part P may be formed on at least one of one side and the other side of the resin layer 40. The indirect light emitter P is a part that implements an additional light emitter by using the lost light emitted to the side of the resin layer 40 among the light components irradiated from the light source 20. As shown in FIG. 2, the indirect light emitting part P is formed between the light reflecting member 90 formed on the side of the resin layer 40 and the side of the resin layer 40 and the light reflecting member 90. Indirect light emitting air gap 91 is included.

When the light emitted from the light source 20 is emitted through the side of the resin layer 40, the light reflecting member 90 reflects the emitted light to form reflected light (or indirect light). Accordingly, the light lost from the lighting device is re-reflected by the light reflecting member 90 to cause a flare phenomenon or a light bleeding phenomenon. Various lighting effects applicable to lighting can be realized.

The light reflecting member 90 may be made of a material having excellent light reflectance, for example, a white resist, and may be made of a synthetic resin containing white pigment dispersed therein or a metal resin having excellent light reflecting properties. It may be. In this case, as the white pigment, titanium oxide, aluminum oxide, zinc oxide, lead carbonate, barium sulfate, calcium carbonate and the like may be used, and when the metal powder is included, Ag powder having excellent reflectance may be included. In addition, it will be possible to further include a separate optical brightener. That is, the light reflecting member 90 of the present invention may be formed using all materials that are excellent in light reflectance, which are currently developed or can be implemented according to future technology development. On the other hand, the light reflecting member 90 is molded directly into the side wall 73 of the diffusion plate 70 is bonded, or attached via a separate adhesive material (for example, adhesive tape or thermosetting PSA), or the side wall ( 73 may be combined with the diffusion plate 70 by printing directly inside.

In addition, although the light reflecting member 90 is shown as being formed over the entire inner surface of the side wall 73 of the diffusion plate 70 in the drawing, this is only one example and the range of the light reflecting member 90 is limited. I will say no.

Meanwhile, in order to maximize the flare phenomenon described above, an indirect light emitting air gap 91 may be formed between the light reflection member 90 and the resin layer 40, and thus light emitted to the side of the resin layer 40 may be formed. Scattered from the indirect light emitting air gap 91 by the refractive index difference, the scattered light is reflected back by the light reflecting member 90 to maximize the flare phenomenon. The width of the indirect light emitting air gap 91 may be formed in a range of more than 0 and 20 mm or less, but is not limited thereto and may be appropriately changed according to the specification of the lighting device and the degree of indirect light emission to be implemented.

The diffusion plate 70 may be disposed on the light source module 100-1, more specifically, on the resin layer 40, and uniformly spreads the light emitted through the resin layer 40 over the entire surface. Do it. The thickness of the diffusion plate 70 may be basically formed in the range of 0.5 to 5mm, but is not limited thereto and may be appropriately changed according to the specification of the lighting apparatus. In particular, the diffusion plate 70 of the present invention has a structure having a top surface 71 and a side wall 73 formed integrally with the top surface 71 as shown in FIG. 2, wherein the side wall 73 is The outer surface of the indirect light emitting unit P is wrapped. The diffusion plate 70 may be generally formed of an acrylic resin, but is not limited thereto. In addition, polystyrene (PS), polymethyl methacrylate (PMMA), cyclic olefin copoly (COC), and polyethylene terephthalate (PET) may be used. ), And may be made of a material capable of performing a light diffusing function such as a high permeability plastic such as resin.

A first air gap 80 may be present between the upper surface 71 of the diffusion plate 70 and the resin layer 40. Due to the presence of the first air gap 80, it is possible to generate a difference in refractive index with the resin layer 40, thereby increasing the uniformity of the light supplied to the diffuser plate 70. It is possible to improve the uniformity (uniformity) of the light diffused and emitted through the 70. At this time, in order to minimize the deviation of the light transmitted through the resin layer 40, the thickness of the first air gap 80 may be in the range of more than 0 and less than 30mm, but is not limited to this and can be changed in design as necessary.

The side wall 73 of the diffuser plate 70 surrounds the outer surface of the indirect light emitting portion P, in particular the outer surface of the light reflecting member 90, and the side wall 73 is the light reflecting member 90 as described above. ) Serves as a support for supporting and a housing for protecting the light source module (100-1). That is, the diffusion plate 70 according to the present invention can perform the role of the housing 150 shown in FIG. 1 as needed. According to this, the diffusion plate 70 itself covers not only the upper portion of the light source module 100-1 but also the side portion thereof, so that the diffusion plate 70 itself can perform the housing function at the same time, and thus does not use a separate structure. According to the manufacturing process efficiency improvement effect and has the effect of improving the durability and reliability of the product itself.

FIG. 3 shows an embodiment of a configuration of the reflection unit 30 and the spacer constituting the reflection unit 30 among the lighting devices of the present invention described above with reference to FIG. 2.

2 to 3 (a), the reflective unit 30 formed on the flexible printed circuit board (10 of FIG. 2) has an air region 36 therein, and an air region ( 26) is to maximize the luminance by improving the reflection efficiency of the light emitted from the light source (20 of FIG. 2).

In particular, the reflective unit 30 may be spaced apart from the first reflective sheet 33 and the first reflective sheet 33 in close contact with the surface of the flexible printed circuit board 10 of FIG. 2 to form an air region 36. It may be configured to include a second reflective sheet 35 of a transparent material. The first and second reflecting sheets 33 and 35 are stacked on the flexible printed circuit board 10 (see FIG. 2), and penetrate the holes formed on the reflecting unit 30 so that the light source (20 of FIG. 2) is moved to the outside. It will protrude.

The air region 36 may be formed by integrally compressing the first and second reflecting sheets 33 and 35 without using a member such as an adhesive, and further, as shown in the drawing, It is also possible to implement an air region 36 in which air is received between the first reflecting sheet 33 and the second reflecting sheet 35 through a spacer 37 such as a separate adhesive member.

The first reflection sheet 33 may be formed using a reflective material that reflects light, for example, a film on which a metal layer such as Ag is formed on a base substrate. Alternatively, the first reflective sheet 33 may be embodied with a synthetic resin, for example, white polyethylen terephthalate (PET), containing a white pigment in order to implement a property of promoting reflection and dispersion of light. At this time, titanium oxide, aluminum oxide, zinc oxide, lead carbonate, barium sulfate, calcium carbonate and the like may be used, and as the synthetic resin, polyethylene terephthalate, polyethylene naphthalate, acrylic resin, colicarbonate, polystyrene, polyolefin , Cellulose source acetate, weather resistant vinyl chloride, etc. may be used, but is not limited thereto.

The second reflecting sheet 35 may be implemented with a film of transparent material such as PET so that the light emitted from the light source 20 (FIG. 2) is transmitted to the surface of the first reflecting sheet 33 to be reflected again.

On the other hand, the reflective pattern 31 may be further formed on the second reflecting sheet 33 so as to further promote the dispersion of light to improve luminance. The reflective pattern 31 is configured to scatter and disperse incident light. The reflective pattern 31 may include a reflective ink including any one of TiO 2, CaCo 3, BaSo 4, Al 2 O 3, Silicon, and polystyrene (PS). The above-described reflective pattern 31 may be formed by printing on the surface, but is not limited thereto.

The structure of the reflective pattern 31 may be a plurality of protruding patterns, and may be regular or irregular. The reflection pattern 31 may be formed in a prism shape, a lenticular shape, a lens shape, or a combination thereof in order to increase the light scattering effect, but is not limited thereto. 2 and 3 (a), the cross-sectional shape of the reflective pattern 31 is shown as being made of a rectangle, but this is only one example. In addition, the cross-sectional shape of the reflective pattern 31 may be triangular, pentagonal, or the like. It may be made of a polygonal, semi-circular, sinusoidal structure having a variety of shapes, such as the shape of the reflection pattern 31 viewed from above may be a polygon (for example, hexagonal), circular, oval, or semicircular.

20 illustrates an embodiment of the reflective pattern 31 illustrated in FIGS. 2 and 3A. Referring to FIG. 20, the reflection patterns 31 may have different diameters depending on a distance from the light source 20. For example, the reflection pattern 31 may have a larger diameter as it is closer to the light source 20. In detail, the diameter of the first reflective pattern 71, the second reflective pattern 72, the third reflective pattern 73, and the fourth reflective pattern 74 may be increased in order. However, the embodiment is not limited thereto, and in addition, the reflective pattern 31 of the present invention may be formed in various configurations such as a configuration for changing the density according to the distance from the light source, a configuration for changing both the size and the density. .

Figure 3 (b) shows an embodiment of the spacer constituting the reflection unit 30 described above in Figure 3 (a). The spacer member 37 according to the present invention performs only a general separation function such as a spacer member for easily separating the first reflective sheet 33 and the second reflective sheet 35 or an adhesive spacer member, thereby performing the air region 36. It is also possible to implement, but more preferably in order to improve the efficiency of the arrangement of the air region and at the same time to improve the adhesion efficiency, in the implementation of the spacer member to form a random patterning structure uniformly shown in Figure 3 (b) can do.

The spaced member 37 shown in FIG. 3B has a plurality of unit spaced members 37a in which a cavity is implemented, and has a hollow structure inside the unit spaced members 37a. One air unit 37b may be implemented in a two-dimensional or three-dimensional structure. In this case, the cross section of the unit spacer 37a may be implemented in various shapes such as polygon, circle, ellipse. In particular, as shown in the figure, in addition to the structure in which each unit spaced member 37a is arranged in close contact with each other, the first air portion 37b inside the unit spaced member 37a is disposed in an irregular structure. In addition, it is also possible to further form a second air portion (37c) consisting of an empty space between each unit spacer 37a. According to this, the lighting apparatus of the present invention including the above-described reflective unit 30 is provided with a reflecting unit 30 having an air region to improve the reflectance of the light and to maximize the brightness improvement, the thickness of the lighting apparatus or the number of light sources Due to the effect of increasing the brightness without increasing the pattern design of the spacer (spacer) forming the air region has the effect of maximizing the control and reflection of the light.

4 illustrates a specific embodiment of the reflection unit described above with reference to FIG. 3.

As described above, the reflective unit 30 according to the present invention includes a first reflective sheet 33 which is in close contact with the surface of the flexible printed circuit board and a second reflective sheet which is spaced apart from the first reflective sheet 33. 35).

In particular, the second reflection sheet 35 may apply a film of a transparent material such as PET, and is provided with a spacer 37 spaced apart from the first and second reflective sheets 33 and 35 by patterning an adhesive material. To form an air region.

In particular, in order to maximize the reflection efficiency, the first reflection sheet 33 includes a film 331 in which the metal reflection layer 38 is adhered through an adhesive, and the film 331 is also on the release film 335. It may be implemented in a structure that is laminated on the adhesive material (PSA) 333 to the medium. However, this is just one example and in addition, the first reflective sheet 33 of the present invention may be implemented in white PET or the like as described above with reference to FIG. 3.

FIG. 5 shows a second embodiment 100-2 of the light source module shown in FIG. The same reference numerals as in FIG. 2 denote the same configuration, and the descriptions overlapping with the above description will be omitted or briefly described.

Referring to FIG. 5, in order to improve heat radiation efficiency, the second embodiment may further include a heat radiation member 110 in the first embodiment 100-1.

The heat dissipation member 110 is disposed on the bottom surface of the flexible printed circuit board 10 and serves to discharge heat generated from the light source 20 to the outside. That is, the heat dissipation member 110 may improve the efficiency of dissipating heat generated from the light source 20 as a heat source to the outside.

For example, the heat dissipation member 110 may be disposed on a portion of the bottom surface of the flexible printed circuit board 10. The heat dissipation member 110 may include a plurality of spaced apart heat dissipation layers (eg, 110-1 and 110-2). At least a portion of the heat dissipation layers 110-1 and 110-2 may overlap the light source 20 in the vertical direction to improve the heat dissipation effect. The vertical direction may be a direction from the flexible printed circuit board 10 to the resin layer 40.

The heat dissipation member 110 may be a material having high thermal conductivity, for example, aluminum, an aluminum alloy, copper, or a copper alloy. Alternatively, the heat dissipation member 110 may be a metal core printed circuit board (MCPCB). The heat dissipation member 110 may be attached to the bottom surface of the flexible printed circuit board 10 by an acrylic adhesive (not shown).

In general, when the temperature of the light emitting device increases due to heat generated from the light emitting device, the luminous intensity of the light emitting device may decrease, and a wavelength shift of the generated light may occur. In particular, when the light emitting device is a red light emitting diode, the degree of wavelength shift and intensity decrease is severe.

However, the light source module 100-2 has a heat dissipation member 110 on the bottom surface of the flexible printed circuit board 10, thereby efficiently dissipating heat generated from the light source 20 to the outside, thereby suppressing a temperature increase of the light source. As a result, the luminous intensity of the light source module 100-2 may be reduced or the wavelength shift of the light source module 100-2 may be suppressed.

FIG. 6 shows a third embodiment 100-3 of the light source module shown in FIG. The same reference numerals as in FIG. 5 denote the same components, and a description overlapping with the above description will be omitted or briefly described.

Referring to FIG. 6, the light source module 100-3 may have a structure in which the first optical sheet 52 is added to the second embodiment.

The first optical sheet 52 is disposed on the resin layer 40 and transmits light emitted from one surface (eg, an upper surface) of the resin layer 40. The first optical sheet 52 may be formed using a material having excellent light transmittance. For example, polyethylene telephthalate (PET) may be used.

Meanwhile, when the first optical sheet 52 is formed, the first air gap 80 described above with reference to FIG. 2 has the upper surface 71 and the first optical sheet 52 of the diffusion plate 70. It can be formed between). Due to the presence of the first air gap 80, the uniformity of light supplied to the diffuser plate 70 may be increased, and as a result, the uniformity of light diffused and emitted through the diffuser plate 70 may be improved. Yes is as described above in the description of FIG.

In addition, although the light reflecting member 90 is shown as being formed over the entire inner surface of the side wall 73 of the diffusion plate 70 in the drawing, this is only one example and the range of the light reflecting member 90 is limited. None is as described above in the description of FIG. 2.

FIG. 7 shows a fourth embodiment 100-4 of the light source module shown in FIG.

Referring to FIG. 7, the light source module 100-4 may have a structure in which an adhesive layer 56, a light shielding pattern 60, and a second optical sheet 54 are added to the third embodiment 100-3. .

The second optical sheet 54 is disposed on the first optical sheet 52. The second optical sheet 54 may be formed using a material having excellent light transmittance, and PET may be used as an example.

The adhesive layer 56 is disposed between the first optical sheet 52 and the second optical sheet 54 to adhere the first optical sheet 52 and the second optical sheet 54.

The optical pattern 60 may be disposed on at least one of an upper surface of the first optical sheet 52 or a lower surface of the second optical sheet 54. The optical pattern 60 may be attached to at least one of the upper surface of the first optical sheet 52 or the lower surface of the second optical sheet 54 by the adhesive layer 56. Another embodiment may further include one or more optical sheets (not shown) on the second optical sheet 56. In this case, the structure including the first optical sheet 52, the second optical sheet 54, the adhesive layer 56, and the optical pattern 60 may be defined as the optical pattern layer 50.

The optical pattern 60 may be a light shielding pattern for preventing concentration of light emitted from the light source 20. The optical pattern 60 is aligned with the light source 20, and may be formed in such a manner that the optical pattern 60 is adhered to the first optical sheet 52 and the second optical sheet 54 by the adhesive layer 56, or It may be formed by directly printing on at least one surface of the first optical sheet 52 and the second optical sheet 54.

The first optical sheet 52 and the second optical sheet 54 may be formed using a material having excellent light transmittance, and PET may be used as an example.

The optical pattern 60 basically functions to prevent the light emitted from the light source 20 from being concentrated. That is, the optical pattern 60 together with the above-described reflective pattern 31 serves to realize uniform surface emission.

The optical pattern 60 may be a blocking pattern that shields a part of the light emitted from the light source 20, and may prevent a phenomenon that the light is excessively strong and the optical characteristics deteriorate or yellowish light is emitted. For example, the optical pattern 60 may serve to prevent light from being concentrated in a region adjacent to the light source 20 and to disperse the light.

The optical pattern 60 may be formed by performing a printing process on the upper surface of the first optical sheet 52 or the lower surface of the second optical sheet 54 using light blocking ink. The optical pattern 60 may not control the light blocking or diffusing degree of light by adjusting the density and / or the size of the optical pattern so as to perform a function of partially blocking and diffusing the light. For example, in order to improve the light efficiency, the optical pattern 60 may be adjusted to decrease the density of the optical pattern as it moves away from the light source 20, but is not limited thereto.

Specifically, the optical pattern 60 may be implemented as a superimposed printing structure of a complex pattern. The superimposition printing structure refers to a structure that forms one pattern and prints another pattern shape thereon.

For example, the optical pattern 60 may include a diffusion pattern and a light shielding pattern, and may have a structure in which the diffusion pattern and the light shielding pattern overlap. For example, using a light shielding ink including any one or more materials selected from TiO 2 , CaCO 3 , BaSO 4 , Al 2 O 3 , Silicon, and PS (polystyrene), the polymer film (eg, the second optical sheet ( 54) may be formed on the bottom surface of the diffusion pattern. A light shielding pattern may be formed on the surface of the polymer film by using a light shielding ink including Al or a mixed material of Al and TiO 2 .

That is, after the diffusion pattern is formed on the surface of the polymer film by white printing, a light shielding pattern may be formed thereon, or a double structure may be formed in the reverse order. Of course, it will be apparent that the patterned design of the pattern may be variously modified in consideration of light efficiency, intensity, and light blocking rate.

Alternatively, in another embodiment, the optical pattern 60 may have a triple structure including a first diffusion pattern, a second diffusion pattern, and a light shielding pattern disposed therebetween. In such a triple structure, it is possible to select and implement the above materials. As an example, the first diffusion pattern may include TiO 2 having excellent refractive index, and the second diffusion pattern may have CaCO 3 having excellent light stability and color. And TiO 2 may be included together, and the light shielding pattern may include Al excellent in concealment. Through the optical pattern of the triple structure, the embodiment can secure the efficiency and uniformity of light. In particular, CaCO 3 functions to realize white light through the function of subtracting the exposure of yellow light, thereby realizing more stable light. In addition to CaCO 3 , BaSO 4 and Al 2 are used as diffusion materials for diffusion patterns. Inorganic materials having large particle sizes and similar structures, such as O 3 and Silicon, may be utilized.

The adhesive layer 56 may surround the periphery of the optical pattern 60, and may fix the optical pattern 60 to at least one of the first optical sheet 52 and the second optical sheet 54. In this case, the adhesive layer 56 may use a thermosetting PSA, a thermosetting adhesive, or a UV curing PSA type material, but is not limited thereto.

On the other hand, when the second optical sheet 54 is formed on the first optical sheet 52, the first air gap 80 described above in the description of FIG. 2 is the upper surface of the diffusion plate 70 ( 71) and the first optical sheet 52. In this case, the thickness of the first air gap 80 and a description of its function are the same as described above in the description of FIG.

In addition, as long as the range including the side surface of the resin layer 40 is not limited to the range in which the light reflection member 90 is formed, as described above with reference to FIG. 2.

FIG. 8 shows a fifth embodiment 100-5 of the light source module shown in FIG.

Referring to FIG. 8, the light source module 100-5 may have a structure in which a second air gap 81 is added to the fourth embodiment 100-4. That is, the fifth embodiment 100-5 may include a second air gap 81 between the first optical sheet 52 and the second optical sheet 54.

For example, a second air gap 81 may be formed in the adhesive layer 56. The adhesive layer 56 forms a space (second air gap 81) spaced around the optical pattern 60, and an adhesive material is coated on the other portions to form the first optical sheet 52 and the second optical sheet ( 54 may be implemented as a structure for adhering each other.

The adhesive layer 56 may have a structure in which the second air gap 81 is positioned at the periphery of the optical pattern 60. Alternatively, the adhesive layer 56 may have a structure surrounding the peripheral portion of the optical pattern 60, and the second air gap 81 is positioned at a portion other than the peripheral portion. The adhesive structure of the first optical sheet 52 and the second optical sheet 54 may be implemented together with the function of fixing the printed optical pattern 60. The structure including the first optical sheet 52, the second optical sheet 54, the second air gap 81, the adhesive layer 56, and the optical pattern 60 may be defined as the optical pattern layer 50. have.

Since the second air gap 81 and the adhesive layer 56 have different refractive indices, the second air gap 81 diffuses light traveling from the first optical sheet 52 in the direction of the second optical sheet 56. Dispersion can be improved. And because of this, the embodiment can implement a uniform surface light source.

9 shows a sixth embodiment 100-6 of the light source module shown in FIG. Referring to FIG. 9, the light source module 100-6 may have a structure in which via holes 212 and 214 are provided in the flexible printed circuit board 10 to improve heat dissipation.

The via holes 212 and 214 may penetrate the flexible printed circuit board 110 and expose a part of the light source 20 or a part of the resin layer 40. For example, the via holes 212 and 214 may include a first via hole 212 exposing a portion of the light source 20 and a second via hole 214 exposing a portion of the bottom surface of the resin layer 40.

Heat generated from the light source 20, which is a heat source, may be directly emitted to the outside through the first via hole 212, and the heat conducted from the light source 20 to the resin layer 40 may be transferred to the second via hole 214. It can be emitted directly to the outside through. In the sixth embodiment, heat generated from the light source 20 is discharged to the outside through the via holes 212 and 214, thereby improving heat dissipation efficiency. The shape of the first via hole 212 and the second via hole 214 may be various shapes such as polygonal, circular, and elliptical.

FIG. 10 shows a seventh embodiment (100-7) of the light source module shown in FIG. Referring to FIG. 10, the light source module 100-7 may have a structure in which the first optical sheet 52 is added to the sixth embodiment. In the seventh embodiment 100-7, heat dissipation efficiency may be improved by the first and second via holes 212 and 214. Descriptions of the components 30, 31, and 52 added in the present embodiment are the same as described above with reference to FIG. 6, and thus will be omitted.

FIG. 11 shows an eighth embodiment (100-8) of the light source module shown in FIG. Referring to FIG. 11, the light source module 100-8 has a structure in which a second optical sheet 52, an adhesive layer 56, a light shielding pattern 60, and a second optical sheet 54 are added to a seventh embodiment. It can have Configurations 52, 54, 56, and 60 added in the present embodiment are the same as described above in FIG. 7, and thus will be omitted.

12 illustrates a ninth embodiment 100-9 of the light source module shown in FIG. 12, in the seventh embodiment, the light source module 100-9 includes the second optical sheet 52, the adhesive layer 56, the light shielding pattern 60, the second optical sheet 54, and the second air. The gap 81 may have an added structure. A second air gap 81 may exist between the first optical sheet 52 and the second optical sheet 54 of the tenth embodiment 100-10, and the second air gap 81 is illustrated in FIG. 8. It may be the same as described.

FIG. 13 illustrates a tenth embodiment (100-10) of the light source module shown in FIG. The same reference numerals as in FIG. 1 denote the same components, and the descriptions overlapping with the above description will be omitted or briefly described.

Referring to FIG. 13, unlike the heat dissipation member 110 of the second embodiment 100-2, the heat dissipation member 310 of the light source module 100-10 is disposed on the bottom surface of the flexible printed circuit board 10. The lower heat dissipation layer 310-1 and a portion of the lower heat dissipation layer 310-1 may have a through part 310-1 penetrating the flexible printed circuit board 10 and contacting the light source 20.

For example, the through part 310-1 may contact the first side part 714 of the first lead frames 620 and 620 ′ of the light emitting device packages 200-1 and 200-2, which will be described later.

According to the tenth embodiment, since heat generated from the light source 20 is directly transmitted to the heat dissipation member 310 by the penetrating portion 310-1, the heat dissipation efficiency can be improved.

FIG. 14 shows an eleventh embodiment 100-11 of the light source module shown in FIG. Referring to FIG. 14, the light source module 100-11 may have a structure in which a first optical sheet 52 is added to the tenth embodiment, and the additional components 30, 31, and 52 are described with reference to FIG. 6. May be the same as

FIG. 15 shows a twelfth embodiment (100-12) of the light source module shown in FIG. Referring to FIG. 13, in the eleventh embodiment 100-11, the light source module 100-12 includes a second optical sheet 52, an adhesive layer 56, a light shielding pattern 60, and a second optical sheet 54. ) May be added structure. Additional configurations 52, 54, 56, and 60 may be the same as described in FIG. 7.

FIG. 16 shows a thirteenth embodiment (100-13) of the light source module shown in FIG. Referring to FIG. 16, the light source modules 100-13 may have a structure in which a second air gap 81 is added to the twelfth embodiment 100-12. That is, a second air gap 81 may exist between the first optical sheet 52 and the second optical sheet 54 of the thirteenth embodiment 100-13, and the second air gap 81 is illustrated in FIG. 8. It may be the same as described above.

17 shows a fourteenth embodiment of the light source module shown in FIG. 1, FIG. 18 shows a fifteenth embodiment of the light source module shown in FIG. 1, and FIG. 19 shows a sixteenth embodiment of the light source module shown in FIG. 1. For example.

The reflection unit 30-1, the second optical sheet 54-1, and the diffuser plate 70-1 shown in FIGS. 17 to 19 are formed by the reflection unit shown in FIGS. 8, 12, and 16. 30), the second optical sheet 54, and the diffusion plate 70 may be modified.

Unevenness R1, R2, and R3 may be formed on one or both surfaces of at least one of the reflection unit 30-1, the second optical sheet 54-1, and the diffusion plate 70-1. The unevenness R1, R2, and R3 serve to reflect and diffuse incident light so that light emitted to the outside forms a geometric pattern.

For example, a first unevenness R1 may be formed on one surface (eg, an upper surface) of the reflection unit 30-1, and a second unevenness R2 may be formed on one surface (eg, an upper surface of the second optical sheet 54-1). ) May be formed, and a third unevenness R3 may be formed on one surface (eg, a lower surface) of the diffusion plate 70. The unevenness R1, R2, and R3 may have a plurality of regular or irregular patterns. In order to increase the reflection and diffusion effects of light, the structure may be formed in a prism shape, a lenticular shape, a concave lens shape, a convex lens shape, or a combination thereof, but is not limited thereto.

In addition, the cross-sectional shape of the uneven (R1, R2, R3) may be made of a structure having a variety of shapes, such as triangle, square, semicircle, sinusoidal. The size or density of each pattern may be changed according to the distance from the light source 20.

Unevenness (R1, R2, R3) can be formed by directly processing the reflecting unit 30-1, the second optical sheet 54-1, and the diffusion plate 70, but there is no limitation and a predetermined pattern is formed It can be formed in any way that is currently developed and commercialized, such as a method of attaching a film, or can be implemented according to future technological developments.

According to the embodiment, the geometric light pattern may be easily implemented through the combination of the patterns of the first to third unevennesses R1, R2, and R3. In another embodiment, irregularities may be formed on one or both surfaces of the second optical sheet 52.

However, the embodiment in which the unevenness R1, R2, or R3 is formed is not limited to FIGS. 17 to 19, and the reflection unit 30, the first optical sheet 52, and the second optical included in other embodiments are not limited thereto. At least one or both surfaces of the sheet 54 and the diffusion plate 70 may be formed with irregularities for increasing the reflection and diffusion effects of light.

FIG. 21 is a plan view of a seventeenth embodiment (100-17) of the light source module shown in FIG. 1, and FIG. 22 is a sectional view taken along the AA 'direction of the light source module 100-17 shown in FIG. 23 is a sectional view in the BB 'direction of the light source modules 100-17 shown in FIG. 19, and FIG. 24 is a sectional view in the CC' direction of the light source modules 100-17 shown in FIG.

21 to 24, the light source modules 100-17 include a plurality of sub-light source modules (natural numbers of 101-1 to 101-n, n> 1). The sub light source modules 101-1 to 101-n may be separated from or combined with each other. In addition, the plurality of sub light source modules 101-1 to 101-n may be electrically connected to each other. In this case, the diffusion plate 70 and the light reflection member 90 are formed by coupling the sub light source modules 101-1 to 101-n with each other, and then the light reflection member 90 is formed on the entire coupling structure. 73) by combining the diffusion plate 70 formed inside.

Each of the sub light source modules 101-1 to 101-n includes at least one connector (eg, 510, 520, 530) that may be connected to the outside. For example, the first sub light source module 101-1 may include a first connector 510 including at least one terminal (eg, S1 and S2). The second sub light source module 101-2 includes a first connector 520 and a second connector 530, respectively, for connecting to the outside, and the first connector 520 includes at least one terminal (eg, P1, P2), and the second connector 530 may include at least one terminal (eg, Q1 and Q2). In this case, the first terminals S1, P1, and Q1 may be positive terminals, and the second terminals S2, P2 and Q2 may be negative terminals. 23 illustrates that each connector (eg, 510, 520, and 530) includes two terminals, but the number of terminals is not limited thereto.

22 to 24 illustrate a structure in which a connector 510, 520, or 530 is added to the fifth embodiment 100-5, but is not limited thereto. The sub light source modules 101-1 to 101- n) a connector (eg, 510, 520, or 530) and a connection fixing part (eg, 410-1, 420-1) to the light source modules 100-1 to 100-20 according to any one of the above-described embodiments. , 410-2) may be added.

22 and 23, each of the sub light source modules 101-1 to 101-n includes a flexible printed circuit board 10, a light source 20, a reflection unit 30, a reflection pattern 31, and a resin. Layer 40, first optical sheet 52, second optical sheet 54, adhesive layer 56, optical pattern 60, heat dissipation member 110, at least one connector 510, 520, or 530, and at least one connection fixing portion 410, and 420. The same reference numerals as in FIG. 1 denote the same components, and the descriptions overlapping with the above description will be omitted or briefly described. Compared to other embodiments, each of the sub light source modules 101-1 to 101-n of the seventeenth embodiment may have a difference in size or the number of light sources, except for a connector and a connection fixing part. May be the same.

The first sub light source module 101-1 may be electrically connected to the light source 20 and may include a first connector 510 provided on the flexible printed circuit board 10 to be electrically connected to the outside. For example, the first connector 510 may be implemented in a patterned form on the flexible printed circuit board 10.

In addition, the second sub light source module 101-2 may include a first connector 520 and a second connector 530 electrically connected to the light source 20. The first connector 520 is provided at one side of the flexible printed circuit board 10 to electrically connect to the outside (eg, the first connector 510 of the first sub light source module 101-1). The second connector 530 may be provided at the other side of the flexible printed circuit board 10 to electrically connect with another external device (eg, a connector (not shown) of the third sub light source module 101-3).

The connection fixing part (eg, 410-1, 420-1, and 410-2) is coupled to other external sub light source modules, and serves to fix the combined two sub light source modules with each other. The connection fixing parts (eg, 410-1, 420-1, and 410-2) are protrusions in which part of the side of the resin layer 40 protrudes, or grooves in which part of the side of the resin layer 40 is recessed. It may be wealth.

Referring to FIG. 24, the first sub light source module 101-1 may include a first connection fixing part 410-1 having a structure in which a part of the side of the resin layer 40 protrudes. In addition, the second sub light source module 101-2 has a structure in which a part of the side of the resin layer 40 is recessed and a first connection fixing part 420-1 and another part of the side of the resin layer 40 protrude. It may include a second connection fixing portion (410-2).

The first connection fixing part 410-1 of the first sub light source module 101-1 and the first connection fixing part 420-1 of the second sub light source module 101-2 may be fixedly coupled to each other. Can be.

Although the embodiment shows that the connection fixing parts (eg, 410-1, 420-1, and 410-2) are implemented as part of the resin layer 40, the present invention is not limited thereto, and a separate connection fixing part may be provided. The connection fixing part may be modified in another form in which it can be connected.

The shapes of the sub light source modules 101-1 to 101-n, and n> 1 may be in the form of protruding portions, but are not limited thereto and may be implemented in various forms. For example, the shapes of the sub light source modules 101-1 to 101-n, and natural numbers of n> 1, as viewed from above, may be circular, elliptical, or polygonal, and a part may protrude in a lateral direction.

For example, one end of the first sub light source module 101-1 may include a protrusion 540 in the center, and a first connector 510 may be provided on the flexible printed circuit board 10 corresponding to the protrusion 540. The first connection fixing part 410-1 may be provided on the resin layer 40 of the remaining portion of one end of the first sub light source module 101-1 other than the protrusion 540.

In addition, one end of the second sub light source module 101-2 may have a groove portion 545 in the center thereof, and a first connector 520 may be provided on the flexible printed circuit board 10 corresponding to the groove portion 545. The first connection fixing part 420-1 may be provided on the resin layer 40 of the remaining portion of one end of the second sub light source module 101-2 other than 545. The other end of the second sub light source module 101-2 may include a protrusion 560 at the center thereof, and a second connector 530 may be provided on the flexible printed circuit board 10 corresponding to the protrusion 560. The second connection fixing part 410-2 may be provided on the resin layer 40 of the remaining portion of one end of the second sub light source module 101-2 other than the protrusion 560.

Each of the sub light source modules 101-1 to 101-n may be an independent light source itself, may be variously modified in shape, and two or more sub light source modules may be assembled to each other independently by a connection fixing part. The embodiment can improve the degree of freedom of product design because it can be used as a phosphorescent light source. In addition, in an embodiment, when some of the assembled sub light source modules are damaged or damaged, only the broken sub light source modules may be replaced.

The light source module described above may be used in a display device, an indicator device, and an illumination system requiring a surface light source. In particular, lighting is required, but the light source module according to the embodiment may be easily installed even in a place where lighting is not easily installed (for example, a ceiling or a floor having a bend) because the portion to which the light is to be mounted has a bend. There is an advantage. For example, the lighting system may include a lamp or a street lamp, and the lamp may be a head lamp for a vehicle, but is not limited thereto.

FIG. 25 illustrates a vehicle head lamp 900-1 according to an embodiment, and FIG. 47 illustrates a general vehicle head lamp that is a point light source. Referring to FIG. 25, the vehicle head lamp 900-1 includes a light source module 910 and a light housing 920.

The light source module 910 may be the embodiments 100-1 to 100-17 described above. The light housing 920 accommodates the light source module 910 and may be made of a light transmissive material. The vehicle light housing 920 may include a curvature depending on the vehicle portion and the design of the vehicle. Meanwhile, as described above, the diffusion plate itself may serve as the vehicle light housing 920, and a separate vehicle light housing 920 may be provided in addition to the diffusion plate. Since the light source module 910 uses the flexible printed circuit board 10 and the resin layer 40, since the light source module 910 has flexibility, the light source module 910 may be easily mounted on the vehicle housing 920 having a bend. In addition, since the light source modules 100-1 to 100-21 have a structure that improves heat dissipation efficiency, the vehicle head lamp 900-1 according to the embodiment can prevent the wavelength shift and the brightness decrease. In addition, as described above, since a separate light reflection member is formed on the side of the resin layer, it is possible to reduce the light loss and to improve the luminance compared to the same power.

Since the general vehicle head lamp illustrated in FIG. 47 is a point light source, a partial spot 930 may appear on the light emitting surface when light is emitted, but the vehicle head lamp 900-1 according to the embodiment is a surface light source. It is possible to realize uniform luminance and illuminance in the entire light emitting surface without generating spots.

FIG. 26 is a perspective view of the light emitting device package 200-1 according to the first embodiment, FIG. 27 is a top view of the light emitting device package 200-1 according to the first embodiment, and FIG. 28 is a first view. The front view of the light emitting device package 200-1 according to the embodiment is shown, and FIG. 29 is the side view of the light emitting device package 200-1 according to the first embodiment.

The light emitting device package 200-1 illustrated in FIG. 26 may be a light emitting device package included in the light source modules 100-1 to 100-17 according to the above embodiments, but is not limited thereto.

26 to 29, the light emitting device package 200-1 may include a package body 610, a first lead frame 620, a second lead frame 630, a light emitting chip 640, and a zener diode 645. ), And the wire 650-1.

The package body 610 may be formed of a substrate having good insulation or thermal conductivity, such as a silicon-based wafer level package, a silicon substrate, silicon carbide (SiC), aluminum nitride (AlN), or the like. It may have a structure in which a plurality of substrates are stacked. However, the embodiment is not limited to the material, structure, and shape of the body described above.

For example, the length X1 of the first direction (eg, X-axis direction) of the package body 610 is 5.95 mm to 6.05 mm, and the length Y1 of the second direction (eg, Y-axis direction) is 1.35 mm to It can be 1.45mm. The length Y2 of the third body (eg, Z-axis direction) of the package body 610 may be 1.6 mm to 1.7 mm. For example, the first direction may be a direction parallel to the long side of the package body 610.

The package body 610 may have a cavity 601 having an open top and consisting of a sidewall 602 and a bottom 603. The cavity 601 may be formed in a cup shape, a concave container shape, or the like, and the sidewalls 602 of the cavity 601 may be perpendicular to or inclined with respect to the bottom 603. The shape of the cavity 601 as viewed from above may be circular, elliptical, or polygonal (eg, rectangular). The corner portion of the cavity 601 that is polygonal may be curved. For example, the length X3 of the first direction (eg, X-axis direction) of the cavity 601 is 4.15 mm to 4.25 mm, and the length X4 of the second direction (eg, Y-axis direction) is 0.64 mm to 0.9. mm, and the depth of the cavity 601 (eg, length in the Z-axis direction, Y3) may be 0.33 mm to 0.53 mm.

The first lead frame 620 and the second lead frame 630 may be disposed on the surface of the package body 610 to be electrically separated from each other in consideration of heat dissipation or mounting of the light emitting chip 640. The light emitting chip 640 is electrically connected to the first lead frame 620 and the second lead frame 630. The number of light emitting chips 640 may be one or more.

A reflection member (not shown) may be provided on the sidewall of the cavity of the package body 610 to reflect the light emitted from the light emitting chip 640 in a predetermined direction.

The first lead frame 620 and the second lead frame 630 may be spaced apart from each other in the upper surface of the package body 610. A portion of the package body 610 (eg, the bottom 603 of the cavity 601) may be disposed between the first lead frame 620 and the second lead frame 630 to electrically isolate the two.

The first lead frame 620 may include one end (eg, 712) exposed to the cavity 601 and the other end (eg, 714) exposed through one surface of the package body 610 through the package body 610. have. In addition, the second lead frame 630 has one end (eg, 744-1) exposed to one side of one surface of the package body 610 and the other end (eg, 744-′) exposed to the other side of one surface of the package body 610. 2) and an intermediate portion (eg, 742-2) exposed to the cavity 601.

The separation distance X2 between the first lead frame 620 and the second lead frame 630 may be 0.1 mm to 0.2 mm. The top surface of the first lead frame 620 and the top surface of the second lead frame 630 may be coplanar with the bottom 603 of the cavity 601.

FIG. 30 illustrates a perspective view of the first lead frame 620 and the second lead frame 630 illustrated in FIG. 26, and FIG. 31 illustrates angles of the first lead frame 620 and the second lead frame illustrated in FIG. 30. 32 is a view for explaining the dimensions of the portion, and FIG. 32 is a connection of the first lead frame 620 adjacent to the boundary portion 801 of the first upper surface portion 712 and the first side portion 714 shown in FIG. 31. An enlarged view of portions 732, 734, and 736 is shown.

30 to 32, the first lead frame 620 includes a first upper surface portion 712 and a first side portion 714 bent from a first side portion of the first upper surface portion 712.

The first upper surface part 712 is positioned on the same plane as the bottom of the cavity 601, is exposed by the cavity 601, and the light emitting chips 642 and 644 may be disposed.

As illustrated in FIG. 31, both ends of the first upper surface portion 712 may have a portion S3 protruding in a first direction (x-axis direction) with respect to the first side surface portion 714. The protruding portion S3 of the first upper surface portion 712 may be a portion supporting the first lead frame in the lead frame array. The length of the protruding portion S3 of the first upper surface portion 712 in the first direction may be 0.4 mm to 0.5 mm. The length K of the first upper surface portion 712 in the first direction may be 3.45 mm to 3.55 mm, and the length J1 of the second direction may be 0.6 mm to 0.7 mm. The first direction may be the x-axis direction in the xyz coordinate system, and the second direction may be the y-axis direction.

The second side portion of the first upper surface portion 712 may have at least one groove portion 701. In this case, the second side portion of the first upper surface portion 712 may face the first side portion of the first upper surface portion 712. For example, the second side portion of the first upper surface portion 712 may have one groove portion 701 in the middle, but is not limited thereto. The number of the groove portions formed on the second side portion may be two or more. The groove 701 may have a shape corresponding to the protrusion 702 provided in the second lead frame 630 to be described later.

The groove 701 illustrated in FIG. 31 may be trapezoidal, but is not limited thereto. The groove 701 may be implemented in various forms such as a circle, a polygon, and an oval. The length S2 of the groove 701 in the first direction may be 1.15 mm to 1.25 mm, and the length S1 of the groove 701 in the second direction may be 0.4 mm to 0.5 mm.

In addition, the angle θ1 formed between the bottom 701-1 and the side surface 701-2 of the groove 701 may be greater than or equal to 90 ° and smaller than 180 °. The light emitting chips 642 and 644 may be disposed on the first upper surface 712 on both sides of the groove 701.

The first side portion 714 may be bent at a predetermined angle downward from the first side portion of the first upper surface portion 712, and the first side portion 714 may be exposed from one side surface of the package body 610. . For example, an angle formed by the first upper surface portion 712 and the first side surface portion 714 may be greater than or equal to 90 ° and smaller than 180 °.

The first lead frame 620 may have one or more through holes 720 in at least one of the first upper surface portion 712 and the first side portion 714. For example, the first lead frame 620 may have one or more through holes 720 adjacent to a boundary portion between the first upper surface portion 712 and the first side surface portion 714. In FIG. 28, two through holes 722 and 724 are spaced apart from each other adjacent to a boundary portion between the first upper surface portion 712 and the first side surface portion 714, but embodiments are not limited thereto.

One or more through holes 720 may be formed in one region of each of the first upper surface part 712 and the first side surface part 714 adjacent to the boundary between the first upper surface part 712 and the first side surface part 714. have. In this case, the through holes (eg, 722-1) formed in one region of the first upper surface portion 712 and the through holes (eg, 722-2) formed in one region of the first side surface portion 714 may be connected to each other. .

A portion of the package body 610 may be filled in the through hole 720 to serve to improve coupling between the first lead frame 620 and the package body. In addition, the through hole 720 serves to easily form a bend between the first upper surface portion 712 and the first side portion 714. However, if the size of the through hole 720 is too large or the number of the through holes 720 is too large, the first upper surface portion 712 and the first side portion 714 may be broken when the first lead frame 620 is bent. Since the size and number of the through-holes 720 must be properly adjusted. In addition, since the size of the through hole 720 is related to the size of the connection parts 732, 734, and 736 to be described later, it is also related to the heat dissipation of the light emitting device package.

Embodiments according to the sizes of each of the first lead frame 620 and the second lead frame 630 having the through holes to be described below may achieve an optimum heat dissipation efficiency in consideration of coupling and ease of bending.

In an embodiment, the first through hole 722 and the second through hole 724 are improved in order to improve engagement with the package body 610 and to facilitate bending of the first lead frame 620 and to prevent damage during bending. The length D11 of the first direction of the first through hole 722 and the length D12 of the first direction of the second through hole 724 may be 0.58 mm to 0.68 mm, The length D2 in the second direction may be 0.19 mm to 0.29 mm. The area of the first through hole 722 may be the same as the area of the second through hole 724, but is not limited thereto.

Referring to FIG. 32, the first lead frame 620 is positioned adjacent to the boundary portion 801 of the first upper surface portion 712 and the first side surface portion 714, and spaced apart from each other by the through hole 720. The first upper surface portion 712 and the first side portion 714 may have connecting portions 732, 734, and 736. For example, the connecting portions 732, 734, 736 of the first portion 732-1, 734-1, or 736-1 and the first side portion 714 each correspond to a portion of the first top surface 712. The second portion 732-2, 734-2, or 736-2 may correspond to a portion thereof. The through hole 720 may be positioned between the connection portions 732, 734, and 736.

The first lead frame 620 may have at least one connection portion corresponding to or aligned with the light emitting chip 642 or 644.

In detail, the first lead frame 620 may include first to third connection portions 732, 734, and 736. The first connecting portion 732 may be positioned corresponding to or aligned with the first light emitting chip 642, and the second connecting portion 734 may be positioned corresponding to or aligned with the second emitting chip 644. have. The third connection portion 736 may be positioned between the first connection portion 732 and the second connection portion 734, and may be misaligned with the first light emitting chip 642 or the second light emitting chip 644. It may be part. For example, the third connection portion 736 may be positioned corresponding to or aligned with the groove portion 701 of the first lead frame 620, but is not limited thereto.

The length C11 in the first direction of the first connecting portion 732 and the length C2 in the first direction of the second connecting portion 734 are the length E of the first direction of the third connecting portion 736. Can be greater than For example, the length C11 of the first direction of the first connection portion 732 and the length C2 of the first direction of the second connection portion 734 may be 0.45 mm to 0.55 mm, and the third connection portion ( The length E of the first direction 736 may be 0.3 mm to 0.4 mm. The reason for placing the third connecting portion 736 between the first through hole 722 and the second through hole 724 is to prevent breakage between the first upper surface portion 712 and the first side portion 714 during bending. For sake.

The ratio of the length E in the first direction of the third connection part 736 and the length C11 in the first direction of the first connection part 732 may be 1: 1.2 to 1.8. The ratio of the length D11 or D12 in the first direction of the through hole 722 to the length B1 in the first direction of the upper end portion 714-1 of the first side portion 714 may be 1: 3.8 to 6.3. .

Since the first connection portion 732 is aligned with the first light emitting chip 642 and the second connection portion 734 is aligned with the second light emitting chip 644, the heat generated from the first light emitting chip 642 The heat may be mainly emitted to the outside through the first connection portion 732, and the heat generated from the second light emitting chip 644 may be discharged to the outside through the second connection portion 734.

According to the embodiment, since the lengths C11 and C2 of the first connecting portion 732 and the second connecting portion 734 in the first direction are larger than the length E of the first connecting portion 732 and the first connecting portion 736 in the first direction. The area of the first connecting portion 732 and the second connecting portion 734 is larger than that of the third connecting portion 736. Therefore, by widening the area of the connection portions 732 and 734 disposed adjacent to the light source 20, the embodiment improves the efficiency of emitting heat generated from the first light emitting chip 642 and the second light emitting chip 644 to the outside. Can be improved.

The first side portion 714 may be divided into an upper end portion 714-1 connected to the first upper surface portion 712 and a lower end portion 714-2 connected to the upper end portion 714-1. That is, the upper portion 714-1 may include some of the first to third connection portions 732, 734, and 736, and the lower portion 714-2 may be positioned below the upper portion 714-1.

The length F1 in the third direction of the upper end 714-1 may be 0.6 mm to 0.7 mm, and the length F2 in the third direction of the lower end 714-2 may be 0.4 mm to 0.5 mm. The third direction may be a z-axis direction in the xyz coordinate system.

Side surfaces of the upper and lower portions 714-1 and 714-2 may have a step in order to improve the coupling between the package body 620 and the airtightness to prevent moisture penetration. For example, both side ends of the lower end 714-2 may protrude laterally based on the side surface of the upper end 714-1. The length B1 in the first direction of the upper end 714-1 may be 2.56 mm to 2.66 mm, and the length B2 in the first direction of the lower end 714-2 may be 2.7 mm to 3.7 mm. The thickness t1 of the first lead frame 620 may be 0.1 mm to 0.2 mm.

The second lead frame 630 may be disposed to wrap around at least one side of the first lead frame 620. For example, the second lead frame 630 may be disposed around the other side portions except for the first side portion 714 of the first lead frame 630.

The second lead frame 630 may include a second upper surface portion 742 and a second side portion 744. The second upper surface portion 742 may be disposed to surround the other side portions except for the first side portion of the first upper surface portion 712. As illustrated in FIGS. 26 and 30, the second upper surface portion 742 may be coplanar with the bottom of the cavity 601 and the first upper surface portion 712, and may be exposed by the cavity 601. The thickness t2 of the second lead frame 630 may be 0.1 mm to 0.2 mm.

The second upper surface portion 742 includes the first portion 742-1, the second portion 742-2, and the third portion 742-3, depending on the position surrounding the first upper surface portion 712. It can be divided into. The second portion 742-2 of the second upper surface portion 742 may be a portion corresponding to or facing the second side portion of the first upper surface portion 712. The first portion 742-1 of the second upper surface portion 742 is connected to one end of the second portion 742-2, and corresponds to or faces one of the remaining sides of the first upper surface portion 712. Can be. The third portion 742-3 of the second upper surface portion 742 is connected to the other end of the second portion 742-2, and corresponds to or faces another one of the remaining sides of the first upper surface portion 712. can see.

The length H1 in the second direction of the first portion 742-1 and the third portion 742-3 may be 0.65 mm to 0.75 mm, and the length H2 in the first direction may be 0.78 mm to 0.88 mm. Can be. The length I of the second portion 742-2 in the first direction may be about 4.8 mm to about 4.9 mm.

The second portion 742-2 of the second upper surface portion 742 may have a protrusion 702 corresponding to the groove portion 701 of the first upper surface portion 712. For example, the shape of the protrusion 702 may match the shape of the groove 701, and the protrusion 702 may be positioned to align with the groove 701. The protrusion 702 may be located in the groove 701. The number of protrusions 702 may be equal to the number of grooves 701. The protrusion 702 and the groove 701 may be spaced apart from each other, and a portion of the package body 610 may be located therebetween. The protrusion 702 is an area for wire bonding between the first light emitting chip 642 and the second light emitting chip 644. The protrusion 702 is aligned between the first light emitting chip 642 and the second light emitting chip 644. Wire bonding can be facilitated.

The length S5 of the protrusion 702 in the first direction may be 0.85 mm to 0.95 mm, the length S4 in the second direction may be 0.3 mm to 0.4 mm, and the protrusion 702 may include the second portion ( An angle θ2 with 742-2 may be greater than or equal to 90 ° and smaller than 180 °.

The second side portion 744 may be bent from at least one side of the second upper surface portion 742. The second side portion 744 may be bent at a predetermined angle (eg, 90 °) downward from the second upper surface portion 742.

For example, the second side portion 744 may be bent at one side of the first portion 742-1 of the second upper surface portion 742 and the third portion of the second upper surface portion 742. The second portion 744-2 may be bent at one side of the portion 742-3.

The first portion 744-1 and the second portion 744-2 of the second side portion 744 may be bent to be positioned at the same side of the second lead frame 630. The first portion 744-1 of the second side portion 744 may be spaced apart from the first side portion 714 and positioned on one side (eg, the left side) of the first side portion 714. The second portion 744-2 of the second side portion 744 may be spaced apart from the first side portion 714 and positioned on the other side (eg, the right side) of the first side portion 714. The first side portion 714 and the second side portion 744 may be located on the same plane. As a result, as shown in FIG. 26, the first side portion 714 and the second side portion 744 may be exposed to the same side of the package body 610. The length A in the first direction of the second side portion 744 may be 0.4 mm to 0.5 mm, and the length G in the third direction may be 1.05 mm to 1.15 mm.

One side of the first portion 742-1 and the third portion 742-3 of the second upper surface portion 742 may have a bent step g1. For example, the bent step g1 is a portion where one side of the first portion 742-1 of the second upper surface portion 742 and one side of the first portion 744-1 of the second side portion 744 meet. It can be located adjacent to. Since the areas of the first upper surface portion 712 and the first side surface portion 714 that are correspondingly positioned by the curved step g1 can be designed to be wider, the embodiment can increase the heat generation area to improve the heat generation efficiency. . This is because the area of the first lead frame 620 is related to the heat dissipation of the light emitting chips 642 and 644.

The other side surfaces of the first portion 742-1 and the third portion 742-3 of the second upper surface portion 742 may have a bent step g2. The reason for forming the bent step g2 is to make it possible to easily observe the bonding material (eg, solder) when the light emitting device package 200-1 is bonded to the flexible printed circuit board 10. to be.

The first side part 714 of the first lead frame 620 and the second side part 744 of the second lead frame 630 are flexible printed circuits of the light source modules 100-1 to 100-21 according to the embodiment. The light emitting chip 640 may be irradiated with light in a direction 3 toward the side surface of the resin layer 40. That is, the light emitting device package 200-1 may have a side view type structure.

The zener diode 645 may be disposed on the second lead frame 630 to improve the breakdown voltage of the light emitting device package 200-1. For example, the zener diode 645 may be disposed on the second upper surface 742 of the second lead frame 630.

The first light emitting chip 642 may be electrically connected to the second lead frame 630 by the first wire 652, and the second light emitting chip 644 may be the second lead following the second wire 654. The zener diode 645 may be electrically connected to the frame 630, and the zener diode 645 may be electrically connected to the first lead frame 620 by a third wire 656.

For example, one end of the first wire 652 may be connected to the first light emitting chip 642, and the other end may be connected to the protrusion 702. In addition, one end of the second wire 654 may be connected to the second light emitting chip 644, and the other end thereof may be connected to the protrusion 702.

The light emitting device package 200-1 may further include a resin layer (not shown) filled in the cavity 601 to surround the light emitting chip. The resin layer may be made of a colorless transparent polymer resin material such as epoxy or silicone.

The light emitting device package 200-1 may implement red light using only a red light emitting chip without using a phosphor, but embodiments are not limited thereto. The resin layer may include a phosphor to change the wavelength of light emitted from the light emitting chip 640. For example, even if a light emitting chip of a color other than red is used, the light emitting device package may emit light of a desired color by changing the wavelength of light using a phosphor.

33 illustrates a first lead frame 620-1 and a second lead frame 630 according to another embodiment. The same reference numerals as in FIG. 28 denote the same configuration, and the descriptions overlapping with the above description will be omitted or briefly described.

Referring to FIG. 33, the first lead frame 620-1 has a structure in which the third connector 736 is removed from the first lead frame 620 shown in FIG. 30. That is, the first lead frame 620-1 may have one through hole 720-1 adjacent to a boundary portion between the first upper surface portion 712 and the first side surface portion 714 ′. The first connection part 732 may be located at one side of the through hole 720-1, and the second connection part 734 may be located at the other side of the through hole 720-1.

34 is a view illustrating a first lead frame 620-2 and a second lead frame 630-1 according to another embodiment. The same reference numerals as in FIG. 30 represent the same configuration, and the descriptions overlapping with the above description will be omitted or briefly described.

Referring to FIG. 34, the first upper surface portion 712 ′ of the first lead frame 620-2 may have a groove portion 701 in the first upper surface portion 712 of the first lead frame 620 illustrated in FIG. 30. May be an omitted structure. The second portion 742-2 ′ of the second upper surface portion 742 ′ of the second lead frame 630-1 is the second upper surface portion 742 of the second lead frame 630 illustrated in FIG. 32. The protrusion 702 may be omitted from the second portion 742-2 of FIG. Other components may be the same as described with reference to FIG. 28.

35 is a view illustrating a first lead frame 620-3 and a second lead frame 630 according to another embodiment. The same reference numerals as in FIG. 30 represent the same configuration, and the descriptions overlapping with the above description will be omitted or briefly described.

Referring to FIG. 35, the first lead frame 620-3 passes through the first lead frame 620 in at least one of the connection portions 732, 734, and 736 of the first lead frame 620 shown in FIG. 30. The through holes h1, h2 and h3 may be formed.

At least one of the connection parts 732-1, 734-1, and 736-1 of the first lead frame 620-3 may be formed at a boundary between the first upper surface part 712 and the first side surface part 714. h1, h2, h3). In this case, the diameters of the fine through holes h1, h2 and h3 may be smaller than the lengths D11 and D12 in the first direction or the lengths D2 in the second direction of the through holes 722 and 724. In addition, the number of minute through holes h1 and h2 formed in the first connection part 732-1 and the second connection part 734-1 is equal to the number of fine through holes formed in the third connection part 736-1. It may be larger than the number of h3), but is not limited thereto. In addition, the shape of the fine through holes h1, h2, h3 may be circular, elliptical, or polygonal. The fine through holes h1, h2, and h3 may not only bend the first lead frame 620-3 but also improve the coupling force between the first lead frame 620-3 and the package body 610.

36 is a view illustrating a first lead frame 620-4 and a second lead frame 630 according to another embodiment. The same reference numerals as in FIG. 30 represent the same configuration, and the descriptions overlapping with the above description will be omitted or briefly described.

Referring to FIG. 36, the first lead frame 620-4 includes a first upper surface portion 712 ″ and a first side portion 714 ″. The first upper surface portion 712 ″ and the first side surface portion 714 ″ are modified examples of the first upper surface portion 712 and the first side surface portion 714 illustrated in FIG. 32. That is, in the first lead frame 620-4, through holes 722 and 724 are omitted from the first upper surface part 712 and the first side surface part 714 of the first lead frame 620 shown in FIG. A plurality of fine through holes h4 spaced apart from each other are provided in one region Q2 of the boundary portion Q of the first upper surface portion 712 ″ and the first side surface portion 714 ″, from which the 722 and 724 are omitted. to be.

The boundary portion Q of the first upper surface portion 712 ″ and the first side portion 714 ″ may be divided into a first boundary region Q1, a second boundary region Q2, and a third boundary region Q3. Can be. The first boundary area Q1 may be an area corresponding to or aligned with the first light emitting chip 642, and the second boundary area Q2 may be an area corresponding to or aligned with the first light emitting chip 642. The third boundary area Q3 may be an area between the first boundary area Q1 and the second boundary area Q2. For example, the first boundary region Q1 may be an area corresponding to the first connecting portion 732 shown in FIG. 30, and the second boundary region Q2 is the second connecting portion 734 shown in FIG. 30. It may be an area corresponding to.

The first boundary area Q1 and the second boundary area Q2 serve as a path for transferring heat generated from the first light emitting chip 642 and the second light emitting chip 644 and include a plurality of fine through holes h4. ) May serve to facilitate bending between the first upper surface portion 712 ″ and the first side portion 714 ″. In FIG. 36, although the diameters of the plurality of fine through holes h4 are the same and the separation distances are the same, the embodiment is not limited thereto. In another embodiment, at least one of the plurality of fine through holes h4 may be formed. The diameter may be different or the separation distance may be different.

37 illustrates a first lead frame 620 and a second lead frame 630-2 according to another embodiment. The second lead frame 630-2 of FIG. 37 may be a modified example of the second lead frame 630 of FIG. 30. The same reference numerals as in FIG. 30 represent the same configuration, and the descriptions overlapping with the above description will be omitted or briefly described.

Referring to FIG. 37, unlike the second portion 742-2 of the second upper surface portion 742 shown in FIG. 30, the second portion 742-of the second upper surface portion 742 ″ shown in FIG. 2 ") has a broken structure and does not connect the first portion 742-1 and the third portion 742-3.

The second upper surface portion 742 ″ of the second lead frame 630-2 may include a first portion 742-1, a second portion 742-2 ″, and a third portion 742-3. Can be. Each of the first to third portions 742-1, 742-2 ″, 742-3 may be positioned around a corresponding one of the sides of the first top portion 712 of the first lead frame 620. Can be.

The second portion 742-2 ″ of the second upper surface portion 742 ″ is connected to the first region 704 and the third portion 742-3 connected to the first portion 742-1. The second region 705 may be spaced apart from the first region 704. Since the package body 610 is filled in the space 706 spaced between the first region 704 and the second region 705, the coupling force between the package body 610 and the second lead frame 630-2 is increased. Can be improved. The second lead frame 630-2 illustrated in FIG. 37 may be divided into first subframes 744-1, 742-1, and 704, and second subframes 744-2, 742-3, and 705. The two may be electrically separated from each other.

38 illustrates a first lead frame 810 and a second lead frame 820 according to another embodiment.

Referring to FIG. 38, the first lead frame 810 may include a first side portion 814 and a second side portion 816 that are bent from a first side portion 812 and a first side portion of the first top portion 812. It may include. Light emitting chips 642 and 644 may be disposed on the first upper surface portion 812.

The second side of the first upper surface portion 812 may have one or more first grooves 803 and 804 and the first protrusion 805. In this case, the second side portion of the first upper surface portion 812 may be an opposite side portion of the first side portion of the first upper surface portion 812. For example, the second side of the first upper surface portion 812 may have two first grooves 803 and 804 and one first protrusion 805 positioned between the first grooves 803 and 804, but is not limited thereto. It doesn't happen. The first grooves 803 and 804 have a shape corresponding to the second protrusions 813 and 814 provided in the second lead frame 820, which will be described later, and the first protrusion 805 is provided in the second lead frame 820. It may have a shape corresponding to the second groove 815. The first grooves 803 and 804 and the first protrusion 805 illustrated in FIG. 38 may have a rectangular shape, but are not limited thereto. The light emitting chips 642 and 644 may be disposed on the first upper surface 812 on both sides of the first grooves 803 and 804.

The first side portion 814 is connected to one region of the first side of the first upper surface portion 712, the second side portion 816 is connected to another region of the first side of the first upper surface portion 712, The first side portion 814 and the second side portion 816 may be spaced apart from each other. The first side portion 814 and the second side portion 816 may be exposed from the same one side of the package body 610.

The first lead frame 610 may have one or more through holes 820 in at least one of the first upper surface portion 812 and the first side surface portion 814. For example, the first lead frame 810 may have one or more through holes 840 adjacent to a boundary portion between the first upper surface portion 812 and the first side surface portion 814. The through hole 820 may have the same structure as described with reference to FIGS. 30 and 32, and may have the same function.

The first lead frame 810 is positioned adjacent to the boundary portion 801 of the first upper surface portion 812 and the first side surface portion 814, spaced apart from each other by the through hole 720, and the first upper surface portion 712. ) And the first side portion 714 may have connecting portions 852, 854, and 856. The structure and function of the connecting portions 852, 854, 856 may be the same as described with reference to FIGS. 30 and 32. The first lead frame 810 may have at least one connection portion corresponding to or adjacent to the light emitting chip 642 or 644.

The length of the first direction of the connection portion (eg, 852, 854) corresponding to or adjacent to the light emitting chips 642 and 644 is the first length of the connection portion (eg, 856) that does not correspond to or is adjacent to the light emitting chip 642, 644. It may be greater than the length of the direction.

The lower side portion of the side surface of the second side surface portion 814 may be protruded in a lateral direction in order to improve the coupling with the package body 620 and the airtightness to prevent moisture penetration.

The second lead frame 820 may be disposed around at least one side of the first lead frame 810. The second lead frame 820 may include a second upper surface portion 822 and a third side portion 824. The second upper surface portion 822 may be divided into a first portion 832 and a second portion 834 according to a position disposed around the first upper surface portion 812.

The second portion 834 of the second top surface 822 may be a portion corresponding to or facing the second side of the first top surface 812. The first portion 832 of the second upper surface portion 822 is connected to one end of the second portion 834 and may correspond to or face the third side portion of the first upper surface portion 712. The third side may be a side perpendicular to the first side or the second side.

The second portion 834 of the second upper surface portion 822 may have second protrusions 813 and 814 corresponding to the first groove portions 803 and 804 of the first upper surface portion 812. The second protrusions 813 and 814 are areas for wire bonding between the first light emitting chip 642 and the second light emitting chip 644, and are disposed between the first light emitting chip 642 and the second light emitting chip 644. Positioning can facilitate wire bonding.

The third side portion 824 may be bent at a predetermined angle (eg, 90 °) downward from the second upper surface portion 822. For example, the third side portion 824 may be bent at one side of the first portion 832 of the second upper surface portion 822. The second side part 816 and the third side part 824 may have a symmetrical shape with respect to the first side part 814. The lower side portion of the side surface of the third side portion 824 may be protruded in a lateral direction in order to improve the coupling with the package body 620 and the airtightness to prevent moisture infiltration. The first side portion 814, the second side portion 816 and the third side portion 824 may be exposed to the same side of the package body 610.

39 is a perspective view of a light emitting device package 200-2 according to another embodiment, FIG. 40 is a top view of the light emitting device package 200-2 shown in FIG. 39, and FIG. 41 is shown in FIG. 39. The front view of the light emitting device package 200-2 is shown, FIG. 42 is a sectional view of the cd direction of the light emitting device package 200-2 shown in FIG. 39, and FIG. 43 is the first lead frame shown in FIG. 39. 620 'and the second lead frame 630'. The same reference numerals as in FIGS. 26 to 30 denote the same configuration, and the descriptions overlapping with the above description will be omitted or briefly described.

39 to 43, the first lead frame 620 ′ of the light emitting device package 200-2 may include a first upper surface portion 932 and a first side portion 934. Unlike the first upper surface portion 712 illustrated in FIG. 30, the first upper surface portion 932 illustrated in FIG. 43 does not have a groove portion. In addition, the second upper surface portion 942 of the second lead frame 630 ′ may be similar to a structure in which the second portion 742-2 of the second upper surface portion 742 of FIG. 34 is omitted.

The first side portion 934 may have the same structure as the first side portion 714 illustrated in FIG. 34. The length P1 of the first upper surface portion 932 in the first direction may be smaller than the length of the first upper surface portion 712 shown in FIG. 30, and the length of the first upper surface portion 932 in the second direction ( J2 may be greater than the length J1 of the first upper surface portion 712 in the second direction. For example, the length P1 of the first upper surface portion 932 in the first direction may be 4.8 mm to 4.9 mm, and the length J2 of the second direction may be 0.67 mm to 0.77 mm. Therefore, since the area of the first upper surface portion 932 illustrated in FIG. 39 is larger than that of the first upper surface portion 712 illustrated in FIG. 34, the embodiment of FIG. 39 may mount a light emitting chip having a larger size. have. The size of the first side portion 944, the through holes 722 and 724, and the connection portions may be the same as described with reference to FIG. 31.

The second lead frame 630 ′ may include a second upper surface portion 942 and a second side portion 944. The second upper surface portion 942 may include a first portion 942-1 disposed around the third side portion of the first upper surface portion 932 and a second portion 942-2 disposed around the fourth side portion. Can be. The third side portion of the first upper surface portion 932 is a side portion perpendicular to the first side portion of the first upper surface portion 932, and the fourth side portion of the first upper surface portion 932 is formed of the first upper surface portion 932. It may be a side facing the three sides.

The first portion 942-1 and the second portion 942-2 of the second upper surface portion 942 may be spaced apart from each other and electrically separated from each other.

The second side portion 944 has a first portion 944-1 connected to the first portion 942-1 of the second upper surface portion 942 and a second portion 942-2 of the second upper surface portion 942. ) May include a second portion 944-2. However, the length P2 of the first portion 942-1 and the second portion 942-2 in the first direction of the second upper surface portion 942 is formed by the second upper surface portion 742 of FIG. 34. The first portion 742-1 and the third portion 742-3 may be larger than the length H2 in the first direction.

For example, the length P2 in the first direction 942-1 and the second portion 942-2 of the second upper surface part 942 in the first direction is 1.04 mm to 1.14 mm, and the length in the second direction ( P3) may be 0.45 mm to 0.55 mm.

The length of the first direction of the protruding portion S22 of the first upper surface portion 932 protruding to support the first lead frame 620 ′ in the lead frame array may be 0.14 mm to 0.24 mm.

The first light emitting chip 642 may be electrically connected to the first portion 942-1 of the second upper surface portion 942 by the first wire 653, and the second light emitting chip 644 may be the second wire. 655 may be electrically connected to the first portion 942-2 of the second upper surface portion 942.

The first light emitting chip 642 and the second light emitting chip 644 may both emit light of the same wavelength. For example, the first light emitting chip 642 and the second light emitting chip 644 may be red light emitting chips that generate red light.

In addition, the first light emitting chip 642 may generate light having different wavelengths. For example, the first light emitting chip 642 may be a red light emitting chip, and the second light emitting chip 644 may be a yellow light emitting chip, and the first light emitting chip may be mounted on the light source package 200-2 according to the second embodiment. 642 and the second light emitting chip 644 may operate separately.

First power (eg, negative power) may be supplied to the first lead frame 620 ′, and second power (eg, positive power) may be supplied to the second lead frame 630 ′. have. Since the second lead frame 630 'is divided into two parts 942-1 and 944-1 and 942-2 and 944-2 that are electrically separated from each other, the first lead frame 620' is common. By using the electrode and supplying second power to the first portion 942-1 and the second portion 942-2 of the second upper surface portion 942 of the second lead frame 630 ′ separately, The light emitting chip 642 and the second light emitting chip 644 may be operated separately.

Therefore, when the light emitting device package 200-2 shown in FIG. 39 is mounted on the light source modules 100-1 to 100-21 according to the embodiment, the light source modules 100-1 to 100-21 are various colors. Can generate a light source. For example, the embodiment may generate a red surface light source when only the first light emitting chip 642 is operated, and the embodiment may generate a yellow surface light source when the second light emitting chip 644 is operated.

44 illustrates measured temperatures of the light emitting device packages 200-1 and 200-2 according to the embodiment. The measurement temperature shown in FIG. 44 represents the temperature of the light emitting chip when the light emitting device package emits light.

Case 1 represents the measurement temperature of the light emitting chip when the length of the first part of the side part of the first lead frame and the second part in the first direction is the same as the length of the third part. ) Represents a measurement temperature of the light emitting chip shown in FIG. 26, and case 3 represents a measurement temperature of the light emitting chip shown in FIG. 37.

Referring to FIG. 44, the measurement temperature t1 of case 1 is 44.54 ° C, the measurement temperature t2 of case 2 is 43.66 ° C, and the measurement temperature t3 of case 3 represents 43.58 ° C.

Accordingly, by changing the design of the connection portions 732, 734, 736 of the first side surface portion 714 of the first lead frame 620, the embodiment can improve the heat dissipation effect, so that the light emitting device packages 200-1, 200 during light emission are provided. Since the temperature rise of the light emitting chip 640 mounted at -2) can be alleviated, it is possible to prevent the decrease of the brightness and the generation of the wavelength shift.

45 illustrates an embodiment of the light emitting chip 640 shown in FIG. 26. The light emitting chip 640 illustrated in FIG. 45 may be, for example, a vertical chip emitting red light having a wavelength range of 600 nm to 690 nm.

Referring to FIG. 45, the light emitting chip 640 includes a second electrode layer 1801, a reflective layer 1825, a light emitting structure 1840, a passivation layer 1850, and a first electrode layer 1860.

The second electrode layer 1801 supplies power to the light emitting structure 1840 together with the first electrode layer 1860. The second electrode layer 1801 may include an electrode material layer 1810 for current injection, a support layer 1815 located on the electrode material layer 1810, and a bonding layer 1820 located on the support layer 1815. have. The second electrode layer 1801 may be bonded to the first lead frame 620 of the light emitting device package 200-1, for example, the first upper surface part 712.

The electrode material layer 1810 may be Ti / Au, and the support layer 1815 may be a metal or semiconductor material. In addition, the support layer 1815 may be a material having high electrical conductivity and thermal conductivity. For example, the support layer 1815 may include at least one of copper (Cu), copper alloy (Cu alloy), gold (Au), nickel (Ni), molybdenum (Mo), and copper-tungsten (Cu-W). It may be a material or a semiconductor including at least one of Si, Ge, GaAs, ZnO, and SiC.

The bonding layer 1820 is disposed between the support layer 1815 and the reflective layer 1825, and the bonding layer 1820 serves to bond the support layer 1815 to the reflective layer 1825. The bonding layer 1820 may include at least one of a bonding metal material, for example, In, Sn, Ag, Nb, Pd, Ni, Au, and Cu. Since the bonding layer 1820 is formed to bond the support layer 815 in a bonding manner, the bonding layer 1820 may be omitted when the support layer 1815 is formed by a plating or deposition method.

The reflective layer 1825 is disposed on the bonding layer 820. The reflective layer 1825 may reflect light incident from the light emitting structure 1840 to improve light extraction efficiency. The reflective layer 825 may be formed of a metal or an alloy including at least one of a reflective metal material, for example, Ag, Ni, Al, Rh, Pd, Ir, Ru, Mg, Zn, Pt, Au, Hf.

In addition, the reflective layer 1825 may include a conductive oxide layer, for example, indium zinc oxide (IZO), indium zinc tin oxide (IZTO), indium aluminum zinc oxide (IAZO), indium gallium zinc oxide (IGZO), and indium gallium tin oxide (IGTO). , AZO (aluminum zinc oxide), ATO (antimony tin oxide) can be formed in a single layer or multiple layers. In addition, the reflective layer 825 may be formed by multilayering a metal and a conductive oxide such as IZO / Ni, AZO / Ag, IZO / Ag / Ni, AZO / Ag / Ni, and the like.

An ohmic region 1830 may be located between the reflective layer 1825 and the light emitting structure 1840. The ohmic region 1830 is an area in ohmic contact with the light emitting structure 1840 and serves to smoothly supply power to the light emitting structure 1840.

A material including ohmic contact with the light emitting structure 1840, for example, at least one of Be, Au, Ag, Ni, Cr, Ti, Pd, Ir, Sn, Ru, Pt, and Hf, may be formed of the light emitting structure 1840. The ohmic region 1830 may be formed by ohmic contact with the ohmic region. For example, the material forming the ohmic region 1830 may include AuBe and may have a dot shape.

The light emitting structure 1840 may include a window layer 1842, a second semiconductor layer 1844, an active layer 1846, and a first semiconductor layer 1848. The window layer 1842 is a semiconductor layer disposed on the reflective layer 1825, and its composition may be GaP.

The second semiconductor layer 1844 is disposed on the window layer 1842. The second semiconductor layer 1844 may be implemented with compound semiconductors such as Groups III-5, II-6, and the like, and may be doped with the second conductivity type dopant. For example, the first semiconductor layer 1844 may include any one of AlGaInP, GaInP, GaN, AlN, AlGaN, InGaN, InN, InAlGaN, AlInN, AlGaAs, GaP, GaAs, GaAsP, and dopant (eg, p-type dopant). Mg, Zn, Ca, Sr, Ba) may be doped.

The active layer 1846 is disposed between the second semiconductor layer 1844 and the first semiconductor layer 848, and has electrons and holes provided from the second semiconductor layer 1844 and the first semiconductor layer 1848. Light may be generated by energy generated during the recombination of holes.

The active layer 1846 may be a compound semiconductor of Groups 3-5 and 2-6, and may include a single well structure, a multi well structure, a quantum-wire structure, a quantum dot structure, or the like. Can be formed.

For example, the active layer 1846 may have a single or multiple quantum well structure having a well layer and a barrier layer. The well layer may be a material having a band gap lower than the energy band gap of the barrier layer. For example, the active layer 1846 may be AlGaInP or GaInP.

The first semiconductor layer 1848 may be formed of a semiconductor compound. The first semiconductor layer 1848 may be implemented with compound semiconductors such as Groups 3-5 and 2-6, and may be doped with the first conductivity type dopant. For example, the first semiconductor layer 1848 may include any one of AlGaInP, GaInP, GaN, AlN, AlGaN, InGaN, InN, InAlGaN, AlInN, AlGaAs, GaP, GaAs, GaAsP, and an n-type dopant (eg, Si, Ge, Sn, etc.) may be doped.

The light emitting structure 1840 may generate red light having a wavelength range of 600 nm to 690 nm, and the first semiconductor layer 1848, the active layer 1846, and the second semiconductor layer 1844 may have a composition capable of generating red light. have. In order to increase light extraction efficiency, a roughness 1870 may be formed on the top surface of the first semiconductor layer 848.

The passivation layer 1850 is disposed on the side of the light emitting structure 1840. The passivation layer 1850 serves to electrically protect the light emitting structure 1840. The passivation layer 1850 may be an insulating material, such as SiO 2 , SiO x , SiO x N y , Si 3 N 4 , or Al 2 O 3 to be formed Can be. The passivation layer 1850 may be disposed on at least a portion of the upper surface of the first semiconductor layer 1848.

The first electrode layer 1860 may be disposed on the first semiconductor layer 1848 and may have a predetermined pattern. The first electrode layer 1860 may be a single or a plurality of layers. For example, the first electrode layer 1860 may include a first layer 1862, a second layer 1864, and a third layer 1866 that are sequentially stacked. The first layer 1862 is in ohmic contact with the first semiconductor layer 1848 and may be formed of GaAs. The second layer 1864 may be formed of AuGe / Ni / Au alloy. The third layer 1866 may be formed of a Ti / Au alloy.

As shown in FIGS. 26 and 39, the first electrode layer 860 may be electrically bonded to the second lead frame 630 or 630 ′ by wires 652, 654, 653, or 655.

In general, when the temperature of the light emitting chip increases, wavelength shift occurs and the brightness decreases. However, the red light emitting chip (Red LED) that generates red light has a degree of wavelength shift and the brightness decrease with increasing temperature, compared to the blue light emitting chip (Blue LED) generating blue light and the light emitting chip (Amber LED) generating yellow light. Is worse. Therefore, in the light emitting device package and the light source module using the red light emitting chip, a heat dissipation measure for suppressing the temperature increase of the light emitting chip is very important.

However, the light source modules 100-1 to 100-21 and the light emitting device packages 200-1 to 200-2 included in the lighting apparatus 1 according to the embodiment may improve heat dissipation efficiency as described above. Therefore, even when the red light emitting chip is used, the temperature increase of the light emitting chip can be suppressed to suppress the wavelength shift and the brightness decrease.

46 shows a lighting device 2 according to another embodiment. Referring to FIG. 46, the lighting device 2 includes a housing 1310, a light source module 1320, a diffusion plate 1330, and a micro lens array 1340.

The housing 1310 accommodates the light source module 1320, the diffusion plate 1330, and the micro lens array 1340, and may be made of a light-transmissive material.

The light source module 1320 may be any one of the above-described embodiments 100-1 to 100-17.

The diffusion plate 1330 may serve to uniformly spread the light emitted through the light source module 1320 over the entire surface. The diffusion plate 1330 may be made of the same material as the diffusion plate 70, but is not limited thereto. In other embodiments, the diffusion plate 1330 may be omitted.

The micro lens array 1340 may have a structure in which a plurality of micro lenses 1344 are disposed on the base film 1342. Each micro lens 1344 may be spaced apart from each other by a predetermined interval. Between each micro lens 1344 may be planar, and each micro lens 1344 may be spaced apart from each other with a pitch of 50-500 micrometers.

In FIG. 46, the diffusion plate 1330 and the micro lens array 1340 are formed as separate components, but in another embodiment, the diffusion plate 1330 and the micro lens array 1340 may be integrally formed.

48 illustrates a tail light 900-2 for a vehicle according to an embodiment, and FIG. 49 illustrates a tail light for a general vehicle.

Referring to FIG. 48, the vehicle tail light 900-2 may include a first light source module 952, a second light source module 954, a third light source module 956, and a housing 970.

The first light source module 952 may be a light source for acting as a turn signal, the second light source module 954 may be a light source for acting as a traffic light, and the third light source module 956 may serve as a stop light. The light source may be, but is not limited thereto, and the roles may be interchanged.

The housing 970 accommodates the first to third light source modules 952, 954 and 956, and may be made of a light transmitting material. The housing 970 can have a bend depending on the design of the vehicle body. At least one of the first to third light source modules 952, 954, and 956 may be implemented as one of the above-described embodiments 100-1 to 100-17.

In the case of taillights, the light intensity at the time of stopping should be 110 candela (cd) or more, so that visual recognition is possible from a long distance and usually requires 30% or more light intensity. For the light output of more than 30%, the number of light emitting device packages applied to the light source module (eg, 952,954 or 956) should be increased by 25% to 35% or more, or the output of the individual light emitting device packages should be increased by 25% to 35%. .

If the number of light emitting device packages is increased, it may be difficult to manufacture due to the limitation of the layout space. Therefore, by increasing the output power of the individual light emitting device packages mounted on the light source module, the desired light intensity may be reduced (eg, 110 candela or more). ) Can be obtained. In general, a value obtained by multiplying the output (W) of the light emitting device package by the number (N) is the total output of the light source module. Therefore, in order to obtain a desired light intensity, an appropriate output and number of light emitting device packages can be determined according to the area of the light source module. have.

For example, in the case of a light emitting device package having a power consumption of 0.2 watts and outputting 13 lumens (lm), light intensity of about 100 candelas may be generated by arranging 37 to 42 in a predetermined area. However, in the case of a light emitting device package having a power consumption of 0.5 watts and a luminous flux of 30 lumens (lm), light of similar intensity can be obtained by arranging only 13 to 15 in the same area. The number of light emitting device packages to be disposed in a light source module having a predetermined area in order to obtain a constant output may be determined according to the pitch, the content of the light diffusion material in the resin layer, the pattern shape of the reflective layer. The interval may be a distance from one intermediate point of two neighboring light emitting device packages to the other intermediate point.

When the light emitting device package is disposed in the light source module, the light emitting device package is disposed at regular intervals. In the case of the high power light emitting device package, the number of arrangements can be relatively reduced, and the light emitting device package can be disposed at a wide interval so that space can be efficiently used. In addition, when the high power light emitting device packages are arranged at narrow intervals, the light intensity may be higher than that at high intervals.

50A and 50B illustrate intervals of a light emitting device package of a light source module used in a tail light for a vehicle according to an embodiment. For example, FIG. 50A may be the first light source module 952 illustrated in FIG. 48, and FIG. 50B may be the second light source module 954 illustrated in FIG. 48.

50A and 50B, the light emitting device packages 99-1 to 99-n, or 98-1 to 98-m may be spaced apart from the substrate 10-1 or 10-2. have. It may be a natural number of n> 1, it may be a natural number of m> 1.

The distance between two adjacent light emitting device packages (eg, ph1, ph2, ph3 or pc1, pc2, pc3) may be different from each other, but the interval is appropriately in the range of 8 to 30 mm.

Because there may be a change depending on the power consumption of the light emitting device package (99-1 to 99-n, or 98-1 to 98-m), the arrangement interval (for example, ph1, ph2, ph3 or pc1, pc2, pc3) This is because the light of neighboring light emitting device packages (for example, 99-3 to 99-4) may interfere with each other to generate a noticeable light in the case of 8 mm or less. In addition, when the arrangement interval (for example, ph1, ph2, ph3 or pc1, pc2, pc3) is 30mm or more, it is possible to generate a dark part due to the area where the light does not reach.

As described above, since the light source modules 100-1 to 100-17 themselves have flexibility, the light source modules 100-1 to 100-17 can be easily mounted on the curved housing 970, so that the tail light 900-2 for the vehicle according to the embodiment of the present disclosure Freedom can be improved.

In addition, since the light source modules 100-1 to 100-17 have a structure of improving heat dissipation efficiency, the tail light 900-2 for a vehicle according to the embodiment can prevent the wavelength shift and the brightness decrease.

Since the general vehicle tail light illustrated in FIG. 49 is a point light source, partial spots 962 and 964 may appear on the light emitting surface during light emission. However, the vehicle tail light 900-2 according to the embodiment emits light because it is a surface light source. Uniform luminance and illuminance can be achieved throughout.

As described above and described with reference to a preferred embodiment for illustrating the technical idea of the present invention, the present invention is not limited to the configuration and operation as shown and described as such, without departing from the scope of the technical idea It will be appreciated by those skilled in the art that many suitable modifications and variations of the present invention are possible. Accordingly, all such suitable modifications and variations and equivalents should be considered to be within the scope of the present invention.

10: printed circuit board 20: light source
30: reflection unit 31: reflection pattern
33: first reflection sheet 35: second reflection sheet
36: air zone 37: spacer
40: resin layer 50: optical pattern layer
52: first optical sheet 54: second optical sheet
56: adhesive layer 60: optical pattern
70: diffuser plate
80: first air gap 81: second air gap
90: light reflecting member 91: indirect light emitting air gap
110: heat dissipation member 101-1 to 101-n: sub light source module
410-1, 420-1, 410-2: connection fixing part 510, 520, 530, 540: connector
610: package body 620: first lead frame
630: second lead frame 640: light emitting chip
645: Zener Diode 650: Wire
712: first upper surface portion 714: first side surface portion
722, 724: through hole 742: second upper surface portion
744: second side portion 801: second electrode layer
810: electrode material layer 815: support layer
820: bonding layer 825: reflective layer
830: ohmic region 840: light emitting structure
850: passivation layer 860: first electrode layer
900: vehicle light 910: light source module
920: light housing

Claims (48)

  1. A light source module including a printed circuit board, a light source disposed on the printed circuit board, and a resin layer disposed on the printed circuit board;
    An indirect light emitting part disposed on at least one of the one side and the other side of the light source module and reflecting light emitted from the light source; And
    A diffuser plate integrally formed with the upper surface and the upper surface disposed on the light source module and including a sidewall extending downward from an end of the upper surface; Including;
    The indirect light emitting unit,
    It includes a light reflection member disposed on any one side and the other side of the light source module and an indirect light emitting air gap disposed between the light reflection member and the light source module,
    The light source module further includes a reflection unit disposed between the printed circuit board and the resin layer.
    The reflection unit may include a first reflection sheet disposed on an upper surface of the printed circuit board;
    A second reflective sheet of transparent material spaced apart from the first reflective sheet; And
    An air region and a spacer disposed between the first reflecting sheet and the second reflecting sheet,
    The plurality of light sources are electrically connected to the printed circuit board through the first reflection sheet and the second reflection sheet,
    Some areas of the light source are disposed between the first reflection sheet and the second reflection sheet,
    And a portion of the light source irradiates light between the first reflective sheet and the second reflective sheet.
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  4. The method according to claim 1,
    The spacer member,
    And at least one unit spacer including the air region therein, wherein the unit spacer comprises an adhesive material.
  5. The method according to claim 4,
    The spacer member,
    Lighting apparatus formed of at least one of a thermosetting PSA, a thermosetting adhesive, a UV curing PSA type material.
  6. The method according to claim 4,
    The spacer member is a plurality of unit spacer members are spaced apart from each other,
    A lighting device having a first air portion formed in the spaced apart space of the unit spacer member.
  7. The method according to claim 1,
    Lighting device comprising a first air gap disposed between the light source module and the upper surface of the diffusion plate.
  8. The method according to claim 1,
    The first reflection sheet,
    Lighting device consisting of white PET (white polyethylen terephthalate) or Ag film.
  9. The method according to claim 1,
    A reflection pattern disposed on an upper surface of the second reflection sheet; Lighting device further comprising.
  10. The method according to claim 9,
    The reflection pattern is,
    A lighting device comprising any one of TiO 2 , CaCO 3 , BaSO 4 , Al 2 O 3 , Silicon, and polystyrene (PS).
  11. The method according to claim 1,
    The light reflection member,
    Lighting device formed of white pigment or metal.
  12. The method according to claim 1,
    The thickness of the indirect light emitting air gap,
    Lighting arrangements formed in the range between 0 and 20 mm.
  13. The method according to claim 1,
    The light source module,
    Further comprising an optical pattern layer disposed on the resin layer,
    The optical pattern layer,
    A first optical sheet disposed on an upper surface of the resin layer to disperse light emitted from the resin layer;
    A second optical sheet disposed on the first optical sheet;
    An optical pattern and an adhesive layer disposed between the first optical sheet and the second optical sheet; And
    And a second air gap disposed around the optical pattern to separate the optical pattern from the adhesive layer.
  14. The method according to claim 1,
    The light source is
    Lighting device as a side view type light emitting device package.
  15. The method according to claim 1,
    The light source is
    A package body having a cavity;
    A first lead frame including one end exposed to the cavity and the other end penetrating through the package body and exposed to one surface of the package body;
    A second lead frame including an end exposed to one side of the one surface of the package body, the other end exposed to the other side of the one surface of the package body, and an intermediate portion exposed to the cavity;
    An illumination device comprising a light source package including a first semiconductor layer, an active layer, and a second semiconductor layer, the light source package including at least one light emitting chip disposed on the first lead frame.
  16. The method according to claim 15,
    The first lead frame,
    A first upper surface portion exposed to the cavity;
    A first side portion bent from a first side portion of the first upper surface portion and exposed to the one surface of the package body; And
    And at least one first through hole formed adjacent to a boundary portion of the first upper surface portion and the first side surface portion.
  17. The method according to claim 16,
    The first lead frame includes connecting portions connecting the first upper surface portion and the first side portion to each other, wherein the first through hole is positioned between the connecting portions, and at least one of the connecting portions has a length remaining. Different from the field,
    The at least one light emitting chip is disposed on the first upper surface portion.
  18. The method according to claim 17,
    At least one of the connecting portions is provided with a second through hole having a diameter smaller than the first through hole.
  19. The method according to claim 16,
    The second lead frame,
    A second upper surface portion disposed around at least one side of the first upper surface portion and exposed to the cavity of the package body; And
    And a second side portion bent from the second upper surface portion and exposed to each of the one side and the other side of the one surface of the package body.
  20. The method according to claim 19,
    At least one groove portion is provided on the second side portion of the first upper surface portion, and the first side portion and the second side portion of the first upper surface portion are sides facing each other.
  21. The method of claim 20,
    The second upper surface portion is an illumination device formed with at least one protrusion corresponding to the groove portion.
  22. The method according to claim 16,
    The ratio of the length in the first direction of the first through-hole and the length in the first direction of the upper end of the first side portion is 1: 3.8 to 6.3, the first direction is the x-axis direction in the xyz coordinate system.
  23. The method according to claim 15,
    The light emitting chip,
    A first electrode layer disposed on the first semiconductor layer;
    A reflective layer disposed under the second semiconductor layer; And
    Lighting device further comprises a second electrode layer disposed below the reflective layer.
  24. The method according to claim 15,
    The light emitting chip is a lighting device for emitting red light having a wavelength range of 600nm ~ 690nm.
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KR1020120065263A 2012-06-18 2012-06-18 Illuminating device KR101979723B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120065263A KR101979723B1 (en) 2012-06-18 2012-06-18 Illuminating device

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
KR1020120065263A KR101979723B1 (en) 2012-06-18 2012-06-18 Illuminating device
JP2013110628A JP6192987B2 (en) 2012-06-12 2013-05-27 Lighting device
US13/907,093 US9312458B2 (en) 2012-06-12 2013-05-31 Lighting device
EP13171316.6A EP2677556B1 (en) 2012-06-12 2013-06-10 Lighting device
CN201310233799.4A CN103486460B (en) 2012-06-12 2013-06-13 Illuminator

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KR20130142034A KR20130142034A (en) 2013-12-27
KR101979723B1 true KR101979723B1 (en) 2019-09-03

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Citations (2)

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JP2006276186A (en) * 2005-03-28 2006-10-12 Dainippon Printing Co Ltd Retroreflection sheet and manufacturing method therefor
JP2011146715A (en) * 2010-01-18 2011-07-28 Lg Innotek Co Ltd Light emitting device package, and light unit with the same

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JP4830768B2 (en) * 2006-05-10 2011-12-07 日亜化学工業株式会社 Semiconductor light emitting device and method for manufacturing semiconductor light emitting device
KR101255280B1 (en) * 2008-02-22 2013-04-15 엘지디스플레이 주식회사 Backlight Unit
US8568012B2 (en) * 2010-01-18 2013-10-29 Lg Innotek Co., Ltd. Lighting unit and display device having the same
KR101168404B1 (en) * 2010-07-02 2012-07-25 엘지이노텍 주식회사 Back light umit within resin layer for light-guide and LCD using the same
KR101171546B1 (en) 2010-07-23 2012-08-06 희성전자 주식회사 Edge type Backlight unit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006276186A (en) * 2005-03-28 2006-10-12 Dainippon Printing Co Ltd Retroreflection sheet and manufacturing method therefor
JP2011146715A (en) * 2010-01-18 2011-07-28 Lg Innotek Co Ltd Light emitting device package, and light unit with the same

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