KR20130115461A - Illuminating device and liquid crystal display device including the same - Google Patents

Illuminating device and liquid crystal display device including the same Download PDF

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Publication number
KR20130115461A
KR20130115461A KR1020120037757A KR20120037757A KR20130115461A KR 20130115461 A KR20130115461 A KR 20130115461A KR 1020120037757 A KR1020120037757 A KR 1020120037757A KR 20120037757 A KR20120037757 A KR 20120037757A KR 20130115461 A KR20130115461 A KR 20130115461A
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KR
South Korea
Prior art keywords
fluorescent layer
pattern
lighting device
light
micro array
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KR1020120037757A
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Korean (ko)
Inventor
박진경
이인재
권기영
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엘지이노텍 주식회사
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Priority to KR1020120037757A priority Critical patent/KR20130115461A/en
Publication of KR20130115461A publication Critical patent/KR20130115461A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-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
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-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
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-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
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/65—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction specially adapted for changing the characteristics or the distribution of the light, e.g. by adjustment of parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/40—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0041—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided in the bulk of the light guide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
    • F21V2200/30—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides doped with fluorescent agents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING 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
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Abstract

PURPOSE: A lighting device and a liquid crystal display including the same are provided to improve the brightness and the light uniformity of the lighting device by forming micro-array patterns on one side or both sides of a fluorescent layer. CONSTITUTION: A lighting device comprises a light emitting module (100) and fluorescent layers (300, 350). The light emitting module comprises at least one LED light source (110). The fluorescent layers are formed on the light emitting module, absorb the excitation light from the LED light source and generate wavelength-converted light. Micro array patterns (400, 500) are formed on one side or both sides of the fluorescent layer. An air gap (700) is formed between the light emitting module and the fluorescent layers. The micro array patterns are in the range of 10-100 micrometers.

Description

Lighting device and liquid crystal display including the same {ILLUMINATING DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE INCLUDING THE SAME}

The present invention relates to the field of lighting technology, and more particularly, to a lighting device having at least one light source and a fluorescent layer, and a liquid crystal display device including the same.

The LED (Light Emitted Diode) device is a device that converts electric signals into infrared rays or light using compound semiconductor characteristics. Unlike fluorescent light, unlike harmful substances such as mercury, it does not cause environmental pollution, It has a long lifetime advantage. In addition, it consumes low power compared to conventional light sources, has high visibility due to high color temperature, and has a small glare.

Therefore, the current lighting device has developed from the conventional light source such as incandescent lamps or fluorescent lamps to the above-mentioned LED device as a light source, and these lighting devices are used from blue to red in combination with phosphors having various emission colors. It can emit various light depending on the purpose.

In particular, the lighting device that emits white light is used for backlight of liquid crystal display device, vehicle mounting lamp, etc., and the demand is increasing rapidly. Recently, it is also used as a lighting device that can replace fluorescent lamp (fluorescent lamp). Is greatly anticipated.

As described above, when the LED device is used for illumination purposes, mainly white light is required, and as described in Korean Patent Laid-Open Publication No. 10-2006-0125535, an illumination technology including a blue LED device and a phosphor layer has been proposed. In the conventional lighting technology, a portion of the blue light emitted from the blue LED device absorbs the phosphor layer to emit yellow light having a changed wavelength. Finally, a mixture of the blue light emitted from the LED device and the yellow light emitted from the phosphor layer is used. Embodied white light will be emitted to the outside.

However, in the lighting technology using the phosphor layer, there was a limit in improving the high brightness and the light uniformity. In the above-described conventional technology, the light uniformity is improved through the configuration of increasing the concentration of the phosphor as the distance from the LED device increases. However, there are limitations in improving luminance and light uniformity only with primary factors such as material development of the phosphor layer.

Publication No. 10-2006-0125535 (published date 2006.12.06.)

The present invention has been proposed in order to solve the above-described problems, the illumination device that can form a fluorescent layer on the light emitting module, to form a micro array pattern on one or both sides of the fluorescent layer to improve the brightness and light uniformity Its purpose is to provide a structure.

Lighting device of the present invention for solving the above problems, the light emitting module having one or more LED light source; A fluorescent layer formed on the light emitting module and including a phosphor for absorbing excitation light of the LED light source and generating wavelength converted light having a wavelength converted; It includes, and the micro-array pattern may be formed on one surface or both surfaces of the fluorescent layer.

In the lighting apparatus of the present invention, an air gap may be further formed between the light emitting module and the fluorescent layer, but is not limited thereto.

In the lighting apparatus of the present invention, the width of the micro array pattern may be formed in the range of 10 to 100 micrometers.

In the lighting apparatus of the present invention, the micro array pattern is formed on the upper surface of the fluorescent layer, it may be made of an embossed pattern.

In the lighting apparatus of the present invention, the micro array pattern may be formed of any one of lenticular shape, pyramid shape, hemispherical shape, prism shape, elliptical shape, or a combination thereof, but is not limited thereto.

In the lighting apparatus of the present invention, a space may be provided between the micro array patterns.

In the lighting apparatus of the present invention, an auxiliary intaglio pattern may be further formed in the separation space.

In the lighting apparatus of the present invention, the cross-sectional shape of the auxiliary intaglio pattern may be formed of any one of triangular, rectangular, semicircular, elliptical, or a combination thereof.

In the lighting apparatus of the present invention, a glass substrate may be further formed on the lower surface of the fluorescent layer.

In the lighting apparatus of the present invention, the micro array pattern is formed on the lower surface of the fluorescent layer, it may be made of an intaglio pattern.

In the lighting apparatus of the present invention, the micro array pattern may be formed of any one of lenticular shape, pyramid shape, hemispherical shape, prism shape, elliptical shape, or a combination thereof, but is not limited thereto.

In the lighting apparatus of the present invention, a space may be provided between the micro array patterns.

In the lighting apparatus of the present invention, an auxiliary relief pattern may be further formed in the separation space.

In the lighting apparatus of the present invention, the cross-sectional shape of the auxiliary relief pattern may be made of any one of triangular, rectangular, semicircular, elliptical, or a combination thereof.

In the lighting apparatus of the present invention, a glass substrate may be further formed on the upper surface of the fluorescent layer.

In the lighting apparatus of the present invention, the micro array pattern may be formed of an embossed pattern formed on the upper surface of the fluorescent layer and an intaglio pattern formed on the lower surface of the fluorescent layer.

In the lighting apparatus of the present invention, the fluorescent layer may be formed of a planar structure or a curved surface forming structure.

In the lighting apparatus of the present invention, the fluorescent layer may be formed of a mixture of the phosphor and the filler.

In the lighting apparatus of the present invention, the fluorescent layer may be formed further comprising a scattering material. Wherein the scattering agent is any one of ZnO, Y 2 O 3 , TiO 2 , BaSO 4 , Al 2 O 3 , SiO 2 , AlN, ZrO 2 , SiC, TaO 5 Si 3 N 4 , Nb 2 O 5 , BN It may be formed of a mixture thereof, but is not limited thereto.

In the lighting apparatus of the present invention, the content of the phosphor is 0.5 to 60wt% based on the total weight of the fluorescent layer, the content of the filler is 39.5 to 99.5wt% relative to the total weight of the fluorescent layer, the content of the scattering material is the entire fluorescent layer It may be formed in the range of 0 to 0.5wt% or less relative to the weight, but is not limited thereto.

In the lighting apparatus of the present invention, the filler may be made of a UV curable polymer resin. In this case, the UV curable polymer resin may be an acrylate resin or an epoxy resin, but is not limited thereto.

In the lighting apparatus of the present invention, the fluorescent layer may further include a monomer consisting of any one or a mixture of IBOA (isobornyl acrylate), HPA (hydroxylpropyl acrylate) 2-HEA (2-hydroxyethyl acrylate).

In the lighting apparatus of the present invention, the filler may be made of ceramic glass.

The above-described lighting apparatus of the present invention may further include a housing having an inner space to accommodate the light emitting module and the fluorescent layer.

In addition, the inner surface of the housing may be further provided with a reflective member.

On the other hand, it is also possible to implement a liquid crystal display device using the above-described lighting device as a backlight unit.

According to the present invention, by forming a micro array pattern on one surface or both surfaces of the fluorescent layer, there is an effect that can improve the brightness and light uniformity of the lighting device.

In addition, according to the present invention, the fluorescent layer can also perform the function of the light diffusion sheet at the same time, it is possible to reduce the thickness of the entire lighting device and to reduce the raw material costs by not using a separate light diffusion sheet have.

In addition, according to the present invention, when the glass substrate is formed, damage to the fluorescent layer due to external factors can be prevented, thereby providing an illumination device with improved durability and reliability.

1 shows a schematic structure of a lighting apparatus according to the present invention.
2 to 6 show each embodiment of the fluorescent layer structure of the lighting apparatus of the present invention.
7 illustrates a schematic structure of a lighting apparatus according to the present invention including a fluorescent layer having a curved surface.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the embodiments described herein and the configurations shown in the drawings are only a preferred embodiment of the present invention, and that various equivalents and modifications may be made thereto at the time of the present application. DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail to avoid obscuring the subject matter of the present invention. 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 portions having similar functions and functions throughout the drawings.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting apparatus using LED as a light source, and to improve the uniformity of the emitted light by forming a micro array pattern on one or both surfaces of the fluorescent layer.

In addition, the lighting device according to the present invention can be applied to various lamp devices that require lighting, such as a vehicle lamp, home lighting device, industrial lighting device, a backlight unit applied to the liquid crystal display device, in addition to the currently developed and commercialized or It can be said that it can be applied to all lighting related fields that can be implemented according to the future technology development.

1 shows a schematic structure of a lighting apparatus according to the present invention.

Referring to FIG. 1, the lighting apparatus according to the present invention includes a light emitting module 100, a fluorescent layer 300 formed on the light emitting module 100, and a micro array pattern 400 formed on one or both surfaces of the fluorescent layer 300. , 500, and may further include a housing 900 having an inner space to accommodate the light emitting module 100 and the fluorescent layer 300. In addition, an air gap 700 may be further formed between the light emitting module 100 and the fluorescent layer 300. That is, the lighting apparatus of the present invention may have a structure in which the air gap 700 is formed by spaced apart from the fluorescent layer 300 and the light emitting module 100. Although not shown in the drawing, the fluorescent layer directly on the light emitting module 100 is provided. It may be made of a structure in which the 300 is formed, that is, a structure in which the air gap 700 is not provided. When the lighting apparatus of the present invention has a structure in which the air gap 700 is not provided, the fluorescent layer 300 may be formed on the light emitting module 100 in close or direct contact with a separate adhesive material. Hereinafter, the case in which the air gap 700 is provided as an example, but only one example, the scope of the present invention is not limited thereto.

The light emitting module 100 includes at least one LED device 110 that emits excitation light L1 and a printed circuit board 130 that physically supports and supplies power to the LED device 110. At this time, the arrangement of the LED device 110 is not limited, such as the arrangement of 1x1, 1x3, 2x2, 2x3, 3x3, other suitable array type.

The fluorescent layer 300 is a portion including a phosphor that absorbs a part of the excitation light L1 emitted from the light emitting module 100 and emits a wavelength-changed light having a changed wavelength. Accordingly, the mixed light L2 can be finally emitted to the outside by mixing the wavelength-changing light emitted from the fluorescent layer and the light not absorbed by the fluorescent layer 300 among the excitation light L1. For example, when the LED element 110 is a blue LED element, and the phosphor is a yellow phosphor, the phosphor absorbs and excites the excitation light emitted from the LED element 110 to fall to the ground state to emit yellow light as wavelength conversion light. Done. In this case, white light, which is finally mixed light, is emitted to the outside of the lighting apparatus by color mixing of blue light and yellow light. The fluorescent layer 300 is largely made of the above-described phosphor and filler, and may further include a scattering material according to the lighting device characteristics.

At this time, the material used as a phosphor, SrS: Eu 3 + , Y 2 O 2 S: Eu 3 + , Y 2 O 3 : Eu 3 + , Y 2 SiO 5 : Eu 3 + , (Y, Gd) BO 3 : Eu 3+, Y 3 Al 5 O 12: Eu 3 +, YVO 4: Eu 3 +, Zn 3 (PO 4) 2: Mn, SrTiO 3: Pr , and Y 2 O 2 S: at least one selected from Eu red phosphor, LaPO 4: Ce 3 +: Tb 3 +, CeMgAl 11 O 19: (Ce 3 +): Tb 3 +, GdMgB 5 O 10: Ce 3+: Tb 3+, Zn 2 SiO 4: Mn, BaAl 12 O 19 : Mn, BaMgAl 14 O 23 : Mn, Y 3 (Al, Ga) 5 O 12 : Tb, LaPO 4 : (Ce, Tb), ZnS: (Cu, Al), Zn (Ga, Al) 2 O 2: Mn, Y 2 SiO 2 : Tb and Y 2 (Al, Ga) 2 O 2: 1 green phosphor, BaMg 2 Al least one selected from Tb 16 O 27: Eu 2 + , (Sr, Ca, Ba) 5 (PO 4) 3 Cl: Eu 2 +, (Zn, Cd) S: Ag, Y 2 SiO 5: Ce, BaMgAl 10 O 17: Eu 2 +, BaMgAl 14 O 23: Eu 2 +, (Ca, Sr, Ba) 10 (PO 4) 6 Cl 2: Eu 2+, ZnGaO 4, ZnSAgCl and Y 2 SiO 2: at least one selected from Ce blue phosphor, Sr 4 Al 14 O 25: Eu 2 +, (Ba, Ca, Mg) 5 (PO 4) 3 Cl: Eu 2 + , and 2SrO 0.84 P 2 O 50.16 B 2 O 3: at least one selected from Eu 2+ green A fluorescent material that represents the mid-wavelength of the blue, the red phosphor, the green phosphor, and the phosphor mixture of the blue phosphor can be used. In addition, Y 3 Al 5 O 12 : Ce 3 + , Y 3 Al 5 SiO 12 : Ce 3 + , other YAG (yttrium aluminum garnet) -based material, Tb 3 Al 5 O 12 : Ce 3 + , Tb 3 Al 5 SiO 12: Ce 3 +, Ba- orthosilicate, (Ca, Sr, Ba) - ortho silicate, (Sr, Ba, Mg) - ortho silicate and Sr 3 SiO 5: 1 yellow phosphor or more species selected from the group consisting of Eu A mixture of the above-mentioned phosphors is also available as needed. However, this is just one example, and there is no limitation, and according to the characteristics of the LED device 110 emitting the excitation light L1, the change in color temperature, and the characteristics required by the lighting device, the presently developed and commercialized or future technology development Therefore, all possible phosphors can be selected and used appropriately.

On the other hand, the content of the phosphor depends on the thickness of the phosphor layer 300 and may vary depending on the target color temperature. In particular, as the thickness of the fluorescent layer 300 decreases, the content of the phosphor is relatively increased. In addition, two or more kinds of phosphors may be mixed and used according to a target color temperature. Therefore, the content of the entire phosphor may be formed in the range of 0.5 to 60wt% relative to the total weight of the phosphor layer 300, but is not limited thereto, and may be appropriately changed according to the thickness of the phosphor layer and the target color temperature.

Scattering material is added to improve the scattering properties of the light, in the present invention ZnO, Y 2 O 3 , TiO 2 , BaSO 4 , Al 2 O 3 , SiO 2 , AlN, ZrO 2 , SiC, TaO 5 Si 3 N 4 , Nb 2 O 5 , BN or any mixture thereof may be used as the scattering material, but is not limited thereto. In addition, the content of the scattering material may be formed in the range of more than 0wt% and 0.5wt% or less with respect to the total weight of the fluorescent layer 300, but is not limited thereto, and may be appropriately changed according to the thickness of the fluorescent layer.

The filler is composed of a main component of the fluorescent layer 300 together with the phosphor, and the filler of the present invention may be made of a light transmissive material such as UV curable polymer resin or ceramic glass.

For example, the filler of the fluorescent layer 300 may be made of a UV curable polymer resin, and in this case, an acrylate resin or an epoxy resin may be used. Of course, the low-boiling dilution-type reactive monomer IBOA (isobornyl acrylate), HPA (Hydroxylpropyl acrylate, 2-HEA (2-hydroxyethyl acrylate), etc. may further include a monomer, a photoinitiator (for example, 1 -hydroxycyclohexyl phenyl-ketone, etc.) or antioxidants, etc. However, the above description is just one example, and in addition, it can perform a light diffusing function that is currently developed and commercialized or can be implemented according to future technological developments. It can be said that the resin layer 150 of the present invention can be formed of all resins present in the present invention. Meanwhile, the content of the filler may be formed in a range of 39.5 to 99.5 wt% based on the total weight of the fluorescent layer 300, but is not limited thereto. It does not need to be, and it can change suitably according to the thickness of a fluorescent layer.

An air gap 700 may be formed between the fluorescent layer 300 and the light emitting module 100, and the air gap 700 scatters the light L1 emitted from the light emitting module 100, thereby forming the fluorescent layer 300. ) To improve the uniformity (uniformity) of the light supplied to. Accordingly, the effect of improving the uniformity of the light emitted through the fluorescent layer 300 can be realized. However, this is only one example, and as described above, a separate air gap 700 may not be formed by closely forming the fluorescent layer 300 on the light emitting module 100.

Micro array patterns 400 and 500 are formed on one or both surfaces of the fluorescent layer 300. The micro array patterns 400 and 500 adjust the angle of light passing through the fluorescent layer 300, diffuse and scatter light, improve front roughness, and remove hot spots. Accordingly, the luminance and uniformity of the light passing through the fluorescent layer 300 may be improved without having a separate light diffusion sheet. The micro array patterns 400 and 500 may be formed in the form of a micro lens, and other details will be described later with reference to FIGS. 2 to 6.

The housing 900 has an inner space to accommodate the above-described light emitting module 100, the fluorescent layer 300, the micro array patterns 400 and 500, and the air gap 700. The housing 900 may be generally formed of a bottom surface 910 and a side wall 930 integrally formed with the bottom surface 910 to surround the side surface. On the other hand, although not shown in the figure, a support member for supporting the fluorescent layer 300 may be further formed inside the housing 900. On the other hand, the inner surface of the housing 900 may be further provided with a reflecting member for reflecting light emitted from the light emitting module 100, the housing 900 itself is a material having a reflective characteristic (for example, Al or white Reflective resin).

FIG. 2 illustrates a first embodiment of a fluorescent layer of the lighting apparatus of the present invention shown in FIG. 1, and more specifically, illustrates an enlarged portion P of FIG. 1.

Referring to FIGS. 1 and 2, the fluorescent layer 300 according to the first embodiment may include a micro array pattern having an embossed pattern 410 on an upper surface thereof, as shown in FIG. 400). In this case, the shape of the embossed pattern 410 may be formed in a hemispherical shape as shown in the figure, in addition to the lenticular shape, pyramid shape, prism shape, elliptical shape or any combination thereof may be implemented. In this case, the width of each embossed pattern 410 may be appropriately adjusted, and more specifically, may be formed in the range of 10 to 100 micrometers, but is not limited thereto. In addition, although the relief pattern 410 is shown as being uniformly arranged in the drawing, this is only one example, it may be arranged non-uniformly.

The above-mentioned embossed pattern 410 may be formed as follows.

For example, when the UV curable polymer resin is used as the filler of the fluorescent layer 300, the UV curable polymer resin and the phosphor are mixed to form a mixture. When the above-described mixture is filled in a mold having an intaglio pattern corresponding to the embossed pattern 410 and irradiated with ultraviolet rays, the UV curable polymer resin is cured, thereby forming the phosphor layer 300 having the embossed pattern 410. Will be.

On the other hand, in the case of using ceramic or glass as the filler of the fluorescent layer 300, the glass powder (glass powder) and the phosphor particles are mixed and melted at 1200 degrees or more. In addition, when the melt is molded using a mold having an intaglio pattern corresponding to the embossed pattern 410 and subjected to a polishing process, the phosphor layer 300 having the embossed pattern 410 may be manufactured. Accordingly, the heat resistance, thermal conductivity, and physical durability of the fluorescent layer 300 can be significantly improved, resulting in an effect of improving the reliability of the entire lighting apparatus.

However, the above description is just one example, and in addition, the embossed pattern 410 may be formed on the fluorescent layer 300 through all methods that are currently developed and commercialized, such as screen printing, or may be implemented according to future technological developments. .

On the other hand, as shown in Figure 2 (b), when the micro array pattern of the embossed pattern 410 is formed on the upper surface of the fluorescent layer 300, the glass substrate 600 is formed on the lower surface of the fluorescent layer 300 Can be further formed. As the glass substrate 600 is formed, the fluorescent layer 300 can be more firmly supported, and further foreign matters can be prevented from flowing into the lighting device, thereby improving the durability of the lighting device. It can be provided.

FIG. 3 illustrates a second embodiment in which the fluorescent layer structure shown in FIG. 2 is modified. 1 to 3, the fluorescent layer 300 according to the second embodiment of the present invention has each embossed pattern 410 forming the micro array pattern (400 of FIG. 1) as shown in FIG. 3A. Spaced apart spaces 430 are further provided, and thus, back scattering is prevented when light emitted from the light emitting module 100 (see FIG. 1) passes through the fluorescent layer 300. It is possible to achieve the effect of preventing light loss and improving light efficiency and brightness.

Meanwhile, an auxiliary intaglio pattern 450 may be further formed in the separation space 430 as shown in FIG. At this time, the shape of the auxiliary intaglio pattern 450 is not limited thereto. For example, the auxiliary intaglio pattern 450 may be embodied in any one or a combination thereof, such as a lenticular shape, a pyramid shape, a prism shape, a hemispherical shape, and an elliptical shape. It is also possible to implement the cross-sectional shape to form a triangular, square, semi-circular, oval or a combination thereof. In this embodiment, by further forming the auxiliary intaglio pattern 450, it is possible to more effectively prevent back scattering, thereby maximizing the effect of preventing light loss, improving light efficiency and luminance. Formation of the separation space 430 and the auxiliary intaglio pattern 450, for example, can be made through the pattern change of the mold described above in the description of Figure 2, in addition to all currently developed and commercialized or can be implemented according to future technology development It can be done through the method.

On the other hand, although not shown in the drawings, the glass substrate (600 in FIG. 2) described above in the description of FIG. 2B is further formed on the lower surface of the fluorescent layer 300 shown in FIGS. 3A and 3B. Naturally, it may be formed.

FIG. 4 is a view illustrating a third embodiment of a fluorescent layer in the lighting apparatus of the present invention shown in FIG. 1, and more specifically, illustrates an enlarged portion P of FIG. 1.

1, 2 and 4, the fluorescent layer 300 according to the third embodiment of the present invention, as shown in Figure 4 (a) of the micro-array pattern consisting of the intaglio pattern 510 ( 500 of FIG. 1. In this case, the intaglio pattern 510 may be formed in a hemispherical shape as shown in the drawing. In addition, the engraved pattern 510 may be implemented in any one of a lenticular shape, a pyramid shape, a prism shape, an elliptical shape, or a combination thereof. In this case, the width of each intaglio pattern 510 may be appropriately adjusted, and more specifically, may be formed in the range of 10 to 100 micrometers, but is not limited thereto. In addition, although the intaglio pattern 510 is illustrated as being uniformly disposed in the drawing, this is only one example, and it may be arranged unevenly.

On the other hand, as shown in Figure 4 (b), when the micro array pattern of the intaglio pattern 510 is formed on the lower surface of the fluorescent layer 300, the glass substrate 600 on the upper surface of the fluorescent layer 300 Can be further formed. That is, by further forming the glass substrate 600 on the upper surface of the fluorescent layer 300, the effect of preventing scratches on the fluorescent layer 300 due to external factors, the effect of preventing the inflow of foreign substances, and accordingly the durability and reliability The effect can be to provide an improved lighting device.

In addition, the formation method of the intaglio pattern 510 is the same as the formation method of the embossed pattern (400 of FIG. 2) described above in the description of FIG. do.

FIG. 5 shows a fourth embodiment in which the fluorescent layer structure shown in FIG. 4 is modified. 1, 2, 4, and 5, the fluorescent layer 300 according to the fourth embodiment includes a micro array pattern (500 of FIG. 1) as shown in FIG. 5A. A space 530 is further provided between each intaglio pattern 510, and thus, backscatter generated when the light emitted from the light emitting module 100 (FIG. 1) passes through the fluorescent layer 300. By preventing scattering, it is possible to prevent light loss and to improve the light efficiency and brightness.

Meanwhile, an auxiliary relief pattern 550 may be further formed in the separation space 530 as shown in FIG. 5B. At this time, the shape of the auxiliary relief pattern 550 is not limited, and may be embodied in any one or a combination of lenticular, pyramidal, prismatic, hemispherical, elliptical, and the cross-sectional shape is triangular. It is also possible to implement a rectangular, semi-circular, oval or a combination thereof. In this embodiment, by further forming the auxiliary relief pattern 550, it is possible to more effectively prevent back scattering, thereby maximizing the effect of preventing light loss, improving light efficiency and luminance.

Formation of the separation space 530 and the auxiliary intaglio pattern 550, for example, may be made through the pattern change of the mold described above in the description of FIG. It can be done through the method.

6 shows a fifth embodiment of a modified fluorescent layer structure according to the present invention.

Referring to FIG. 6A, a micro array pattern (400 of FIG. 1) including the relief pattern 410 described above with reference to FIG. 2 is formed on an upper surface of the fluorescent layer 300 according to the fifth embodiment. The spaced space 430 described above with reference to FIG. 3 is provided between each of the relief patterns 410.

In addition, a micro array pattern (500 of FIG. 1) formed of the intaglio pattern 510 described above with reference to FIG. 4 is further formed on the bottom surface of the fluorescent layer 300, and between the intaglio patterns 510 is illustrated in FIG. 5. In the description of the separation space 530 described above is further formed. Accordingly, by maximizing the light diffusion function, the uniformity of the light emitted to the outside can be further improved, and the light efficiency and luminance can be further improved by further preventing backscattering.

Meanwhile, the auxiliary intaglio pattern 450 and the auxiliary relief pattern 550 may be further formed in the separation spaces 410 and 510 formed on the upper and lower surfaces of the fluorescent layer, as shown in FIG. Other description is the same as described above in the description of Figures 2 to 5, and will be omitted.

7 illustrates a schematic structure of a lighting apparatus according to the present invention including a fluorescent layer having a curved surface.

1 to 7 (a), the lighting apparatus according to the present embodiment, unlike the fluorescent layer 300 of the planar structure shown in Figure 1 (300 of FIG. 1), a curved surface formed with a fluorescent layer 350 ), And the fluorescent layer 350 itself is formed of a curved surface forming structure, thereby improving light uniformity and light reflecting efficiency.

As shown in FIG. 7B, the fluorescent layer 350 includes a micro array pattern 400 formed on an upper surface and an embossed pattern 410 and a micro array formed on an under surface and an intaglio pattern 510. The pattern 500 may be further provided, thereby further maximizing the effect of improving light uniformity, light efficiency, and brightness.

On the other hand, although not shown in the drawings, in addition to the fluorescent layer 350 according to the present embodiment it will be apparent that the microarray pattern structure described above in Figures 2 to 6 can be applied.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Those skilled in the art will appreciate that many suitable modifications and variations are possible in light of the present invention. Accordingly, all such suitable modifications and variations and equivalents should be considered to be within the scope of the present invention.

100: light emitting module
110: LED light source
130: substrate
300, 350: fluorescent layer
400, 500: micro array pattern
600: glass substrate
700: air gap
900: housing

Claims (28)

A light emitting module having one or more LED light sources;
A fluorescent layer formed on the light emitting module and including a phosphor for absorbing excitation light of the LED light source and generating wavelength converted light having a wavelength converted;
/ RTI >
Illumination apparatus having a micro array pattern formed on one surface or both surfaces of the fluorescent layer.
The method according to claim 1,
An air gap is formed between the light emitting module and the fluorescent layer.
The method according to claim 1,
The width of the micro array pattern is,
Illumination device formed in the range of 10 to 100 micrometers.
The method according to claim 1,
The micro array pattern,
Is formed on the upper surface of the fluorescent layer, the illumination device consisting of an embossed pattern.
The method of claim 4,
The micro array pattern,
Lighting device consisting of any one or a combination of lenticular, pyramid, hemispherical, prism, elliptical shape.
The method of claim 4,
Illumination apparatus provided with a space between each micro array pattern.
The method of claim 6,
The lighting device further comprises an auxiliary intaglio pattern in the space.
The method of claim 7,
The cross-sectional shape of the auxiliary intaglio pattern is,
Triangular, rectangular, semi-circular, elliptical any one or a combination thereof.
The method of claim 4,
The lower surface of the fluorescent layer,
Lighting device further formed glass substrate.
The method according to claim 1,
The micro array pattern,
Is formed on the lower surface of the fluorescent layer, the illumination device consisting of an intaglio pattern.
The method of claim 10,
The micro array pattern,
Lighting device consisting of any one or a combination of lenticular, pyramid, hemispherical, prism, elliptical shape.
The method of claim 10,
Illumination apparatus provided with a space between each micro array pattern.
The method of claim 12,
The lighting device further comprises an auxiliary relief pattern in the space.
The method according to claim 13,
The cross-sectional shape of the auxiliary relief pattern is,
Triangular, rectangular, semi-circular, elliptical any one or a combination thereof.
The method of claim 10,
On the upper surface of the fluorescent layer,
Lighting device further formed glass substrate.
The method according to claim 1,
The micro array pattern,
Lighting device comprising an embossed pattern formed on the upper surface of the fluorescent layer and the intaglio pattern formed on the lower surface of the fluorescent layer.
The method according to claim 1,
The fluorescent layer,
Illumination apparatus formed of a mixture of the phosphor and the filler.
18. The method of claim 17,
The fluorescent layer,
Lighting device further comprises a scattering material.
19. The method of claim 18,
The scattering material,
Formed from any one of ZnO, Y 2 O 3 , TiO 2 , BaSO 4 , Al 2 O 3 , SiO 2 , AlN, ZrO 2 , SiC, TaO 5 Si 3 N 4 , Nb 2 O 5 , BN or mixtures thereof Lighting equipment.
19. The method of claim 18,
The content of the phosphor, 0.5 to 60wt% relative to the total weight of the phosphor layer,
The content of the filler, 39.5 to 99.5wt% relative to the total weight of the fluorescent layer,
The amount of the scattering material is greater than 0 over 0.5wt% of the total weight of the fluorescent layer.
18. The method of claim 17,
The filler,
Lighting device made of UV curable polymer resin.
23. The method of claim 21,
The UV curable polymer resin,
Lighting device which is an acrylate resin or an epoxy resin.
The method of claim 20,
The fluorescent layer,
IBOA (isobornyl acrylate), HPA (hydroxylpropyl acrylate) 2-HEA (2-hydroxyethyl acrylate) Illuminator further comprises a monomer consisting of any one or a mixture thereof.
18. The method of claim 17,
The filler,
Lighting device made of ceramic or glass.
The method according to claim 1,
The fluorescent layer,
Lighting device consisting of a planar structure or a bend forming structure.
The method according to any one of claims 1 to 25,
A housing having an inner space to accommodate the light emitting module and the fluorescent layer; Further comprising:
27. The method of claim 26,
Illumination device further formed with a reflective member on the inner surface of the housing.
A liquid crystal display device comprising the illuminating device of claim 1.
KR1020120037757A 2012-04-12 2012-04-12 Illuminating device and liquid crystal display device including the same KR20130115461A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150067906A (en) * 2013-12-10 2015-06-19 엘지이노텍 주식회사 lighting device
KR20160065063A (en) * 2016-05-23 2016-06-08 삼성디스플레이 주식회사 Backlight assembly and display divece having the same
KR20160076779A (en) * 2014-12-23 2016-07-01 주식회사 루멘스 Light converting panel, light emitting device package module and backlight unit
KR20170110125A (en) * 2015-02-04 2017-10-10 메르크 파텐트 게엠베하 Electro-optic switching element and display device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150067906A (en) * 2013-12-10 2015-06-19 엘지이노텍 주식회사 lighting device
KR20160076779A (en) * 2014-12-23 2016-07-01 주식회사 루멘스 Light converting panel, light emitting device package module and backlight unit
KR20170110125A (en) * 2015-02-04 2017-10-10 메르크 파텐트 게엠베하 Electro-optic switching element and display device
KR20160065063A (en) * 2016-05-23 2016-06-08 삼성디스플레이 주식회사 Backlight assembly and display divece having the same

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