KR20120021633A - Color changing ultraviolet coating composition for light emitting diode - Google Patents

Color changing ultraviolet coating composition for light emitting diode Download PDF

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KR20120021633A
KR20120021633A KR1020100077397A KR20100077397A KR20120021633A KR 20120021633 A KR20120021633 A KR 20120021633A KR 1020100077397 A KR1020100077397 A KR 1020100077397A KR 20100077397 A KR20100077397 A KR 20100077397A KR 20120021633 A KR20120021633 A KR 20120021633A
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led
phosphor
weight
color conversion
light
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KR1020100077397A
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Korean (ko)
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심현섭
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심현섭
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/44—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the coatings, e.g. passivation layer or anti-reflective coating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/50—Wavelength conversion elements
    • H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/10—Details of semiconductor or other solid state devices to be connected
    • H01L2924/11—Device type
    • H01L2924/12—Passive devices, e.g. 2 terminal devices
    • H01L2924/1204—Optical Diode
    • H01L2924/12041—LED

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Led Device Packages (AREA)
  • Planar Illumination Modules (AREA)

Abstract

PURPOSE: A UV coating compostion is provided to obtain white light from high-intensity blue LED or purple LED, or selectively ultraviolet LED, thereby remarkably increasing the life of a LED light source. CONSTITUTION: A UV coating composition for converting color comprises 25-97 weight% of a UV-curable resin, 3-75 weight% of phosphors for changing color, or 25-96.99 weight% of a UV curable resin, 3-65 weight% of phosphors for changing color, and 0.01-10.0 weight% of light diffusing beads with the average diameter of 0.2-30 micron. The UV-curable resin is at least one kind of resin selected from a group consisting of urethane acrylate, epoxy acrylate, polyester acrylate, and acryl acrylate.

Description

UV coating composition for LED color conversion {COLOR CHANGING ULTRAVIOLET COATING COMPOSITION FOR LIGHT EMITTING DIODE}

The present invention relates to a UV coating composition for LED (Light Emitting Diode) color conversion, and more particularly, a color conversion phosphor, and optionally an optical dispersion and / or pigment are mixed in a heat-resistant transparent UV curing matrix resin. It is possible to obtain white light for lighting or display simply and inexpensively from a long life high brightness blue LED, a purple LED, or an ultraviolet LED without using a relatively short and expensive high brightness white LED. Since it is formed as a surface, the color conversion phosphor is uniformly distributed and coated, and when used as a light, it can effectively alleviate the glare caused by high-brightness LED light to obtain a milder and more comfortable light. Can be simplified.

LED is a kind of semiconductor device that converts electrical energy into light energy by using the characteristics of a semiconductor made of a specific compound.It has very low power consumption due to its high light conversion efficiency, and is small in size, thin, and light in weight due to its small light source. Suitable but infinitely extended installation, semi-permanently long lifetime (approximately 100,000 hours for blue, purple, or UV LEDs and approximately 30,000 hours for white LEDs), no thermal or discharge light, no preheating required The response speed is very fast, the lighting circuit is very simple, and it does not use gas and filament for discharging, so the impact resistance is large and safe, the cause of environmental pollution is small, and high repeat pulse operation is possible. Less fatigue and full color can be used for mobile phones, camcorders and digital cameras. And light sources for liquid crystal display (LCD) back lights, such as personal digital assistants (PDAs), signal lamps, electronic signs, vehicle headlights and tail lights, light emitting devices for various electronic devices, office equipment, fax machines, and remote controllers. It is widely used for information transmission of outdoor billboards by various combinations of night light of illumination camera, infrared communication, red and green pixels, high precision billboard display, and high quality indoor and outdoor lighting. As the high-brightness LED that improves the low-brightness problem is commercially available on the market, its use and application are rapidly expanding.

In particular, since white LEDs are very useful for liquid crystal display (LCD) back light and indoor / outdoor lighting, the frequency of their use is rapidly increasing, and it is not long before the market withdrawal of incandescent bulbs by fluorescent lamps. It is expected to be.

The method for obtaining white light by the LED is as follows.

First, there is a method of obtaining white light by combining three LEDs of red, green, and blue as a classical method. However, the manufacturing cost is high and the driving circuit is complicated, which increases the size of the product and the temperature characteristics of the three LEDs are different. Because of its inferior optical properties and reliability, it is rarely used at present.

Therefore, in recent years, a white LED is adopted as a single LED that generates white light, and the surface of the white LED is coated with a phosphor, or the periphery or lens is mixed and molded, and a single LED having a specific wavelength is produced. A method is used in which light excites phosphors to produce light of different wavelengths and mix them with the light produced by the single LED chip to obtain white light.

However, since the conventional method uses a method of coating a phosphor directly on the surface of a blue, purple, or ultraviolet LED, or by mixing and molding a phosphor in a peripheral portion or a lens portion thereof, heat dissipation characteristics are deteriorated. Due to deterioration, there is a problem that the life of the LED is significantly shortened to about 1/3 or less, and in particular, there is a problem that the light emission color becomes heterogeneous unless a very homogeneous coating or dispersion distribution of the phosphor is made, and a homogeneous coating of the phosphor. Or a serious problem that it is quite difficult to achieve a variance distribution.

The oldest type of white LED, widely used, is coated with a yellow phosphor (typically yttrium-aluminum-garnet: Y 3 Al 5 O 12 : Ce, YAG-based compound) on an InGaN-based blue LED having a wavelength of 450 nm, or By molding, the blue light of the blue LED excites the YAG yellow phosphor and complements the short wavelength region of blue light having a narrow peak of the blue LED and yellow light having a wide peak by the YAG-based yellow phosphor. This technique is disclosed in US Pat. No. 5,998,925 to Nichia, which allows human eyes to recognize white light.

However, this white light is a mixture of two wavelengths of light that are not completely complementary and only holds a part of the spectrum of visible light. Therefore, the color rendering property is about 60-75 and cannot be recognized as white light close to natural light. While not very satisfactory, blue LEDs exhibit the highest efficiency for an excitation light source of about 405 nm, while YAG-based phosphors are excited by blue light of 450-460 nm, resulting in low luminance, especially in coating or molding YAG-based phosphors. Since it is difficult to ensure homogeneous and uniform dispersibility, the uniformity and reproducibility of the product is low in the brightness and spectral distribution of white light, and the LED life is also shortened significantly.

Another type of white LED uses a high luminance UV LED having a wavelength of 250 nm to 390 nm as an excitation light source and combines red, green, and blue phosphors to solve the problems of the blue LED and the white LED by the YAG-based phosphor. As a technique of obtaining white light close to a natural color of three wavelengths having high color rendering property, it is disclosed in US Pat. No. 5,952,681 to Solidlite. However, blue and green phosphors show satisfactory luminous efficiency, but the luminous efficiency of red phosphors decreases, which impedes practical use. In particular, ultraviolet LEDs not only degrade organic resins by ultraviolet rays having strong energy, but also significantly reduce LED lifetimes. It is shortened.

Another type of white LED is obtained by solidlite using a purple LED with a wavelength of 390 nm to 410 nm and combining red, blue, and green phosphors. High-brightness purple LEDs are commercially available from Cree Corporation of the United States, and are known to emit relatively natural three-wavelength white light by emitting red, blue and green phosphors evenly by violet light in the range of 390-410 nm. .

Factors affecting the characteristics of the white light emitted from the white LED element include, for example, the intensity of the emitted light from the LED, the combined suitability of the emitted light from the LED and the light fluorescence converted by the phosphor, the composition and content of the phosphor, and the dispersion of the phosphor. And the like, and the emitted light is significantly affected by these factors. In particular, in the case of a white LED by a blue LED and a YAG-based phosphor, a problem in which the emission color is biased toward blue or yellow is often prone to occur due to difficulty in controlling the addition amount of the yellow phosphor and homogeneous dispersion.

In order to obtain a white LED having excellent luminescence properties, the phosphor should be homogeneously dispersed in the transparent matrix resin, but the phosphor having a specific gravity much higher even before the matrix resin is completely cured in the manufacturing process (depending on the type of phosphor, but the specific gravity is about 3.8 to 6.0 ) Is precipitated in the lower portion of the light-transmitting matrix resin (specific gravity of 1.1 to 1.5 in the case of epoxy resin) is difficult to obtain white light having excellent optical properties, it is not easy to precisely control the dispersion degree of the phosphor There is a problem that the white LED device is not easy to manufacture and the manufacturing reproducibility is also poor.

On the other hand, in the LED lighting device, the LED lens is used for the purpose of making the diffuse light emission of the LED by voltage application to be parallel light and increasing the radiation intensity within the directivity angle. By controlling the curvature of the upper surface of the lens to be emitted, the orientation angle is adjusted. It can select from the things suitably, and to use.

1 is a cross-sectional view of a conventional conventional LED lens, which is not necessarily the case, but is generally a variety of forms, but generally in the form of a spherical sphere of the light beam narrowing, the annular side 7 and the flange ( 8) has an upper surface 7a formed thereon, and the LED mounting portion 9 is formed in a cylindrical shape on the bottom thereof, and the upper portion of the LED mounting portion 9 has a planar shape, but generally an inner convex portion 7b for condensing. ) Is formed.

The upper surface 7a of the LED lens may be formed with a comb pattern or a plurality of dots or a smooth smooth surface for softening the emission illumination light, and may have a shape having an opening in the center of the upper surface, and an irradiation angle For adjustment, the gradation and length of the side 7 may vary and the shape of the upper surface 7a may be convex, smooth or concave, or some other shape. Sometimes.

In the figure, reference numeral 5 denotes a substrate, and 6 denotes an LED element molding light diffusion lens.

2 is an exploded perspective view showing a schematic configuration of a conventional edge type backlight unit 100 ', the main configuration of which is a light source 15a and a light guide plate 10 having one end portion facing the light source 15a. ′), The reflective sheet 20 below it, the prism sheet 30 above the light guide plate 10 ′, the light diffusion sheet 40 stacked thereon again, and the protective sheet thereon ( 50).

Specifically, the illustrated example includes a linear light source 15a or a white LED (not shown) provided with a reflecting plate 15b connected to a thick side of the light guide plate 10 'that is tapered in its entirety. The light source unit 15 is positioned, and the reflective sheet 20 is placed below the light guide plate 10 ', and the prism sheet 30, the light diffusion sheet 40, and the protective sheet 50 are disposed above the light guide plate 10'. In order to form a stacked structure, a plurality of mutually parallel prism patterns (not shown) are formed on the prism sheet 30.

The upper surface of the light guide plate 10 ′ forms an emission surface 11, the bottom surface 13 is in contact with the reflective sheet 20, and one side adjacent to the light source 15a is a smooth entrance surface 12. On the bottom surface 13 of the light guide plate 10 ', a plurality of prism patterns 14 are formed to be parallel to each other in a direction orthogonal to a direction in which light emitted from the light source unit 15 travels, thereby forming a prism slope ( 14a, 14b).

Here, the light irradiated from the light source unit 15 is received by the incident surface 12 formed as a smooth surface and scattered by the prism slopes 14a and 14b of the prism pattern 14 at the bottom of the light guide plate 10 '. The plurality of light guide plates 10 'are emitted toward the prism sheet 30 through the exit surface 11 of the light guide plate 10' and then formed in a direction perpendicular to the prism pattern 14 formed on the bottom surface 3 of the light guide plate 10 '. The parallel prism pattern (not shown) is scattered again by the formed prism sheet 30, and then converted into light homogenized by the light diffusion sheet 40 and emitted.

The light diffusion sheet 40 serves to convert the incident light into light having a homogeneous luminance over the entire area of the display panel by diffusing and scattering the incident light, and thus the prism in the conventional backlight unit having the structure as shown. Due to the stacking of the light diffusing sheet 40 to the sheet 30, not only is it an obstacle to lightening, but there is also a problem of increasing production cost and lowering process efficiency due to the increase in the number of labor and parts.

Therefore, the first object of the present invention is a high brightness blue LED or purple LED or optionally ultraviolet light having a long life (approximately 100,000 hours of service life) without using a conventional high brightness white LED having a relatively short life time (about 30,000 hours service life). It is to significantly increase the life of the white light emitting LED light source by obtaining white light for lighting or display by a simple and easy surface protection hard thin film from the LED.

The second object of the present invention is to adjust the white light to the desired intensity easily, at a low cost, by a user or a builder, or by using a relatively low-cost blue LED, purple LED, or ultraviolet LED instead of the existing high-brightness white LED. It is for making a mild white light use.

A third object of the present invention is to effectively and easily eliminate the fear of uneven distribution of light emitting color due to uneven distribution or coating of the phosphor for illumination color conversion.

The fourth object of the present invention is to effectively alleviate the glare caused by high-brightness white LED lighting to obtain a more gentle and comfortable lighting.

A fifth object of the present invention is to reduce the risk of deterioration of lighting equipment due to its excellent heat resistance.

A sixth object of the present invention is to provide a durable backlight unit having a thinness and simplicity of structure by using a color conversion light guide plate for a backlight unit.

The above object of the present invention is an LED color composed of 25 to 97% by weight of UV curable resin, preferably 40 to 95% by weight, and 3 to 75% by weight of phosphor for color conversion, preferably 5 to 60% by weight. It can be achieved smoothly by the conversion UV coating composition.

In addition, the general object of the present invention is 25 to 96.99% by weight, preferably 45 to 94.99% by weight, 3 to 65% by weight of the phosphor for color conversion, preferably 5 to 50% by weight, and an average particle diameter of 0.2? UV coating for LED color conversion consisting of 0.01 to 10.0% by weight, preferably 0.01 to 5.0% by weight of light diffusing beads of 30 μm, preferably 0.5 to 5 μm, and specifically 1.0 to 3.5 μm It can be achieved smoothly by the composition.

In addition, the general object of the present invention can be smoothly achieved by the above-described UV coating composition for LED color conversion containing 0.1 to 3.0% by weight, preferably 0.1 to 1.0% by weight.

The above-mentioned various objects are achieved by the above-mentioned UV coating composition for LED color conversion, wherein the UV curable resin is at least one resin selected from the group consisting of urethane acrylate, epoxy acrylate, polyester acrylate, and acrylic acrylate. It can be achieved smoothly.

According to the UV coating composition for LED color conversion according to the present invention, by using only a white light emitting LED lens or light guide plate independently without touching the blue, purple, or ultraviolet LED itself emits white light as in the conventional white light LED As a result, it is not necessary to use a relatively expensive and short life white LED having a lifespan of about one third, and, if desired, simply and easily replace the lens of the existing long life blue, purple or ultraviolet LED. Since white light can be obtained, the user or contractor can easily replace the existing LED lens with a gentle white light of a desired brightness by replacing the LED lens of the present invention with a user of a non-producer. Effectively alleviates glare It is possible to obtain a light, in the display device can achieve a reduction in thickness of the backlight unit to simplify the structure, it can reduce the deterioration of the light concerned or the display device due to the excellent heat resistance is efficiently and economically.

1 is a longitudinal cross-sectional view of a conventional LED lens of the prior art.
2 is an exploded perspective view illustrating a schematic configuration of a conventional typical edge type backlight unit.
Figure 3 is a longitudinal cross-sectional view of the LED lens coated with a color conversion UV coating composition of the present invention.
Figure 4 is an exemplary schematic diagram of the coating layer of the color conversion UV coating composition according to the present invention.
5 to 7 are exploded perspective views illustrating a schematic configuration of a backlight unit to which a color conversion light guide plate coated with a color conversion UV coating composition of the present invention is applied to an entrance surface or an emission surface.

Hereinafter, the present invention will be described in more detail.

First it will be described with reference to Figure 4 as an exemplary schematic diagram of the coating layer (1) of the UV coating composition for LED color conversion according to the present invention, in the present specification UV coating composition for LED color conversion (1) ) May optionally be used to refer to the UV coating layer 1 for LED color conversion.

As the UV curable matrix resin (2), those having excellent transparency and heat resistance can be preferably used. If the transparency and heat resistance are good, there is no particular limitation in the present invention. However, urethane acrylate is preferable as the heat resistant transparent UV curable matrix resin (2). , Epoxy acrylate, polyester acrylate, acrylic acrylate, or any mixed resin thereof, and the amount of these matrix resins added is 25 to 97% by weight, preferably 40 to 95% by weight based on the total weight of the composition. Range of%.

When the content of these heat resistant transparent UV curable matrix resins (2) is less than 25% by weight based on the total weight of the composition, the transparency is inferior and the brightness may be excessively lowered due to the halo effect caused by scattering, which is not preferable. When it exceeds 97% by weight, the white light emission effect due to the illumination color conversion is insufficient, which may be inferior to the illumination color or the color of the display device.

Since all of the above UV curable matrix resins 2 are commonly used as heat-resistant transparent resins in which polymerization is initiated by ultraviolet rays, the description thereof will be omitted.

On the other hand, as the phosphors 3c and 4c for color conversion to white light applicable to the present invention, when using a blue LED, only a YAG-based yellow phosphor known in the art may be used, but preferably a green phosphor and a red phosphor are used. It is preferable to obtain natural white light having three wavelengths. When using a purple LED or an ultraviolet LED, it is preferable to use a green phosphor, a red phosphor, and a blue phosphor for the same reason.

The white LED obtained when using a blue LED and a YAG yellow phosphor is typically (YGd) 3 Al 5 O 12 : Ce or Sr 2 Ga 2 S 5 : Eu 2 + phosphor developed by Nichia, and the yellow phosphor is 550? It is mainly excited at 560 nm.

On the other hand, when using a blue LED (425 nm ~ 475 nm wavelength region), green phosphor and red phosphor and blue phosphor, the present invention is not limited to this, although various known in the art can be used 430 nm to 480 nm Examples of red phosphors that can be excited in the wavelength region of are Y 2 O 2 S: Eu, Gd, Li 2 TiO 3 : Mn, LiAlO 2 : Mn, 6MgO · As 2 O 5 : Mn 4+ , or 3.5MgO.0.5 MgF 2 · Ge 2 : Mn 4+ , and examples of the green phosphor that can be excited in the wavelength region of 515 nm to 520 nm include ZnS: Cu, Al, Ca 2 MgSi 2 O 7 : Cl, Y 3 (Ga x Al 1-x ) 5 O 12 : Ce (0 <x <1), La 2 O 3 .11Al 2 O 3 : Mn, Ca 8 Mg (SiO 4 ) 4 C l2 : Eu, Mn.

A three-wavelength white LED using a blue LED and red and green phosphors excites a mixture of red and green phosphors to produce red and green light mixed with the blue light of the blue LED chip to emit three wavelength white light.

In addition, the red and green phosphors that can be excited by the blue LED chip described above are stable in oxide form and have an extended lifetime.

In the present invention, the green phosphor and the red phosphor are mixed in an appropriate ratio to directly and indirectly coat the blue LED chip to obtain 3-wavelength white light, and the smooth upper surface 7a of the LED lens is not directly related to the LED itself. ) Or by forming the UV coating layer 1 for LED color conversion on the smooth entrance surface 12 and / or exit surface 11 of the light guide plates 10, 10a, and 10b of the display device. There is.

When the UV coating layer 1 for LED color conversion is applied to the light guide plates 10, 10a, and 10b, in particular, to the incident surface, it is economical due to the reduction of the amount of phosphors and eco-friendly since volatile organic volatiles are hardly generated. Productivity is significantly higher than that of the thermosetting type, and the formed coating film has high anti-scratch property, and if necessary, antistatic or antistatic agent is added by adding an antistatic agent or antifouling agent known in the art. It can also give a pollution resistance easily.

Among the red and green phosphors, the red phosphor is preferably Li 2 TiO 3 : Mn when the emission peak wavelength is about 659 nm, and LiAlO 2 : Mn is preferable when the emission peak wavelength is about 670 nm, and the emission peak is If the wavelength of 650㎚ has 6MgO and As 2 o 5: Mn 4+, and is preferably, if the peak emission wavelength is about 650㎚ and 3.5MgO 0.5MgF 2 o GeO 2: Mn 4 + is preferred.

Among the red and green phosphors, the green phosphor is preferably La 2 O 3 · 11Al 2 O 3 : Mn when the emission peak wavelength is about 520 nm, and Y 3 (Ga x when the emission peak wavelength is about 516 nm. Al 1-x ) 5 O 12 : Ce (0 <x <1) is preferable, and when the emission peak wavelength is about 515 nm, Ca 8 Mg (SiO 4 ) 4 Cl 2 : Eu, Mn is preferable.

The green phosphor and the red phosphor may be mixed in various ratios and may form an intermediate color LED such as pink or blue white. Meanwhile, the blue LED chip may be InGaN type, SiC type, or ZnSe type.

On the other hand, in the case of a purple LED or an ultraviolet LED, in addition to the green phosphor and the red phosphor as described above, BaMgAl 10 O 17 or (Sr, Ca, BaMg) 10 (PO 4 ) 6 Cl 2 : Eu may be used as the blue phosphor. .

By appropriate combination of the red, blue and green phosphors described above, white light or light of various colors or various light having different color temperatures can be obtained.

The white light obtained can be appropriately adjusted within the color temperature range of 3200 to 7500K depending on the characteristics of the lighting device or the display device by appropriate combination of red, blue and green phosphors.

The content of the red phosphor, blue phosphor, green phosphor, or a combination thereof (3c, 4c) is 3 to 75% by weight, preferably 5 to 60% by weight, based on the total weight of the composition, and red with respect to the blue LED. When the phosphor and the green phosphor are used, the weight ratio is 1: 0.2 to 1.2, preferably 1: 0.3 to 0.8, and when the red phosphor, the blue phosphor, and the green phosphor are used for the purple LED or the ultraviolet LED. The weight ratio of is also in a ratio of 1: 0.2 to 1.2: 0.2 to 1.2, preferably 1: 0.3 to 0.8: 0.3 to 0.8.

When the content of the color converting phosphors 3c and 4c is less than 3.0 wt% based on the weight of the total composition, satisfactory white light may not be obtained. It is unpreferable because there is a possibility that it may be excessively lowered.

On the other hand, examples of the light diffusers 3b and 4b that may be selectively added in the present invention include a silicone resin (refractive index 1.43), polyacrylate (refractive index 1.49), polyurethane (refractive index) 1.51), polyethylene (refractive index 1.54), polypropylene (polypropylene: refractive index 1.46), nylon (Nylon: refractive index 1.54), polystyrene (refractive index 1.59), polymethylmethacrylate (refractive index 1.49), polycarbonate organic light diffusing agents such as homopolymers such as (polycarbonate: refractive index 1.59) and copolymers of these monomers; Silica (refractive index 1.47), alumina (refractive index 1.50 to 1.56), glass (glass: refractive index 1.51), calcium carbonate (CaCO3: refractive index 1.51), talc (talc: refractive index 1.56), mica (mica: 1.56) Inorganic light diffusing agents such as barium sulfate (BaSO 4: refractive index 1.63), zinc oxide (ZnO: refractive index 2.03), cesium oxide (CeO 2: refractive index 2.15), titanium dioxide (TiO 2: refractive index 2.50? 2.71), iron oxide (2.90), Or any mixture thereof.

When the light diffusing bodies 3b and 4b are added, those having an average particle diameter of 0.2 to 30 µm, preferably 0.5 to 5 µm, and specifically 1.0 to 3.5 µm are used, and the addition amount thereof is 0.01 based on the total weight of the composition. It is -10.0 weight%, Preferably it is 0.01-5.0 weight%, More preferably, it is 0.01-2.0 weight%.

If the average particle diameters of the light diffusers 3b and 4b are less than 0.2 µm, the transparency or light transmittance may be inferior. In contrast, if the average diameter of the light diffusers 3b and 4b exceeds 30 µm, the excitation of the phosphor may be insufficient or uneven. Likewise not preferred.

If the amount of the light diffusers 3b and 4b added to the total composition is less than 0.01% by weight, the excitation of the phosphor may be insufficient or uneven, which is not preferable. This may be inferior, which is not preferable.

0.01 to 10.0% by weight, preferably 0.01 to 5.0% by weight of the light diffusing bodies 3b and 4b having the average particle diameter of 0.2 to 30 µm, preferably 0.5 to 5 µm, and specifically 1.0 to 3.5 µm. When added to, the content of the UV-curable matrix resin (2) is controlled to 25 to 96.99% by weight, preferably 45 to 94.99% by weight, the content of the color conversion phosphor (3c, 4c) is 3 to 65% by weight It is preferably controlled at 5 to 50% by weight.

Specifically, in order to express homogeneous white light by the above-mentioned LED color conversion UV coating layer (1), a light diffuser having an average particle diameter of 1 to 4 µm: 5 to 10 µm: 11 to 30 µm is weight ratio 1: 0.4 to 0.8: 0.1. Mixtures mixed at ˜0.3 can also be used.

In addition, rarely, an inorganic or organic pigment may be included in an amount of 0.1 to 3.0% by weight, preferably 0.1 to 1.0% by weight for color control of a lighting device or a display device, and an organic pigment is preferable in view of transparency. Examples of the nitro pigments, azo pigments, indanthrene pigments, thioindigo pigments, perylene pigments, dioxazine pigments, quinatridone pigments, phthalocyanine pigments, quinophthalone pigments can be used a variety of known . For example, a warm yellow pigment may include monoazo, diazo, naphthalazo benzene, yellow wall, rhubarb or any mixed pigment thereof, but this is optional in the present invention.

On the other hand, the coating film thickness of the LED color conversion UV coating composition according to the present invention is not limited, but is generally 1 ~ 250㎛, preferably about 3 ~ 100㎛.

Next, an example in which the UV coating composition for LED color conversion of the present invention is applied as the coating layer 1 will be described with reference to the accompanying drawings showing the LED lens of FIG. 3 and the light guide plates 10, 10a, 10b of FIGS. 5 to 6. It will be described in more detail.

3 is a longitudinal cross-sectional view of the LED lens 10 is coated on the smooth upper surface 7a of the UV coating layer 1 for LED color conversion according to the present invention.

Here, the LED lens is not necessarily limited, but has a smooth upper surface 7a in which an annular side portion 7 and a flange 8 are formed as a spherical shape of the upper and lower straits, and the LED mounting portion 9 is formed in a cylindrical shape at the bottom thereof. In the conventional epoxy LED lens having an inner convex portion 7b above the LED mounting portion 9, the smooth upper surface 7a described above has a coating layer 1 made of the UV coating composition for LED color conversion according to the present invention. This coating is used to simplify the emission color by simply fitting an LED lens coated with the appropriate LED color conversion UV coating layer 1 according to the present invention irrespective of a predetermined color tone such as a blue LED, a purple LED, an ultraviolet LED, and a white LED. Can be converted easily.

In addition, the upper surface of the LED lens may be in the form of a comb-shaped upper surface or a plurality of dot-shaped upper surfaces or a smooth smooth upper surface for softening the emission illumination light, and if necessary, the shape having an opening in the center of the upper surface It may be a convex shape, a smooth surface, a concave surface, or a certain other shape that protrudes forward, but in the present invention, the coated surface in order to easily secure the homogeneous distribution of the phosphor for color conversion. It is preferable to form this smooth surface.

4 again, the phosphors 3c and / or 4c and / or the light diffuser (beads) 3b and / or 4b, and / or the pigment 3a in the UV curable matrix resin 2 are further reduced. And / or the state in which 4a) is homogeneously dispersed is shown schematically.

As can be seen from Figure 4, the LED color conversion UV coating composition (1) is independently applied to the LED lens or the light guide plate without touching the light emitting LED itself, it is simple and inexpensive to change the emitting color of the LED blue, purple, ultraviolet Strict homogeneity of the phosphor as it can be converted from to white light, and the phosphors 3c and / or 4c can perform sufficient emission color conversion by scattering by light diffusers (beads) 3b and / or 4b. While one distribution is not particularly a problem, it is possible to remarkably reduce or alleviate eye sting and fatigue caused by the high brightness of the LED when directly looking at the light source.

5 is a schematic view of a backlight unit 100 using a light guide plate 10 in which a coating layer 1 by the UV coating composition for LED color conversion according to the present invention is applied to an incident surface 12 (see an enlarged portion “B”). As an exploded perspective view showing the configuration, the light source unit 15 made of a plurality of LED light sources 19 of any one type of blue, purple, or ultraviolet LED and the incident surface 12 face the light source unit 15 described above. The prism sheet 30, the light diffusion sheet 40, and the protective sheet 50 which are sequentially stacked on the light guide plate 10, the reflective sheet 20 on the bottom surface thereof, and the upper surface constituting the emission surface 11. ).

FIG. 6 is a schematic view of a backlight unit 100a using a light guide plate 10a having a coating layer 1 coated with an UV coating composition for LED color conversion according to the present invention applied to an exit surface 11 (see enlarged portion “C”). It is an exploded perspective view showing the configuration, and except for the difference in the coating position of the coating layer 1 by the UV coating composition for LED color conversion according to the present invention is essentially the same as in Fig. 5 and further description will be omitted.

In the above-described example, the prism patterns 14 formed of the prism slopes 14a and 14b are formed on the bottom surface 13 of the light guide plates 10 and 10a described above, as shown in the enlarged portion “A”.

Subsequently, FIG. 7 shows that the coating layer 1 by the UV coating composition for LED color conversion according to the present invention is applied to the incident surface 12 (see enlarged portion “D”), and the interior adjacent to the incident surface 12 described above. The internal prism pattern 18, which consists of a plurality of longitudinal slits spaced in parallel with each other, formed by a laser beam, shows a schematic configuration of the backlight unit 100b using the light guide plate 10b formed in parallel with the incident surface 12. As an exploded perspective view, the light source unit 15 made of a plurality of LED light sources 19 of any one of blue, purple, or ultraviolet LEDs, and the incident surface 12 on which the UV coating layer 1 for color conversion is formed are described above. The reflective sheet 20 is positioned on the bottom surface of the light source unit 15, and only the protective sheet 50 is present on the upper surface of the emission surface 11. Practically all the same.

Therefore, in the backlight units 100, 100a, and 100b to which the UV coating composition or coating layer 1 for LED color conversion according to the present invention shown in FIGS. 5 to 7 described above is applied, the light source 19 is relatively expensive and short lifespan. Without using a white LED having a low cost and long life, using a blue, purple, or ultraviolet LED and using a coating layer (1) made of a UV coating composition for LED color conversion to a simple and convenient white light Not only can the long life be maintained by the conversion, but it is also economical and effective.

6 shows an example in which the prism sheet 30, the light diffusing sheet 40, and the protective sheet 50 are all present, as described above in the UV coating layer 1 for LED color conversion. When the light diffusers 3b and 4b are added, the UV coating layer 1 for LED color conversion itself performs the functions of the light diffusion sheet 40 and the protective sheet 50 simultaneously, and the prism in the configuration of the backlight unit. Since the structure of the sheet 30 is not essential, all of them may be omitted at the same time. If necessary, the UV light for LED color conversion in which the above-described light diffusers 3b and 4b are added with the prism sheet 30 attached thereto may be omitted. By coating the coating layer 1, the backlight unit 100a can be thinned and simplified, thereby providing economical efficiency and excellent durability according to the reduction of the number of labor and parts.

In addition, in the example of FIG. 7, mutually side by side in the longitudinal direction (width direction) by irradiating and focusing the laser beam output from a well-known laser oscillator to the inside adjacent to the incident surface 12 of the light guide plate 10b. Since the inner prism pattern 18 has a plurality of inner prism patterns 18 spaced apart in parallel, the inner prism pattern 18 disperses light emitted from the light source 19 thinly and uniformly in a horizontal direction orthogonal thereto. (10b) The prism pattern 14 on the bottom face shows the surface light source of uniform brightness on the emission surface 11.

In the illustrated example, since the inner prism pattern 18 is present inside the light guide plate 10b, the incident surface 12 itself is formed as a smooth surface, thus coating the UV coating composition 1 for LED color conversion containing phosphors. Even smoothly under uniform dispersion of the phosphor, the operation can also be easily performed.

The light guide plates 10, 10a, and 10b are made of various known heat-resistant transparent resins such as acrylic, polycarbonate, polymethyl methacrylate, or crystal or glass.

In addition, in the example shown in FIG. 7, the UV coating composition 1 for LED color conversion is coated on the smooth incident surface 12 and the inner inner prism pattern 18 and the bottom surface adjacent to the incident surface 12 described above. By applying the light guide plate 10b according to the present invention in which the prism pattern 14 of FIG. 13 is formed, the back light unit 100b having a thin and simplified structure in which only the protective sheet 50 is laminated on the exit surface 11 is formed. Although not limited thereto, a coating layer made of another LED color conversion UV coating composition (1) containing the light diffusing body as described above may be provided on the exit surface 11 instead of the protective sheet 50 described above. By further forming to function as a light diffusion and protective sheet, the backlight unit 100b can be dramatically thinned and simplified, thereby providing economical efficiency and excellent durability due to the reduction in the number of parts and the number of parts.

On the other hand, there is no particular limitation as to the type of photoinitiator that can be used in the present invention, and alpha hydroxy ketone, phenyl glyoxylate, alpha amino ketone, butyl dihydroxy ketone, and acyl phosphine, which are generally widely used for ultraviolet curing hard coatings. Oxides and the like, but in the present invention, alpha hydroxyketone or phenyl glyoxylate is preferred in terms of good light transmissivity, and the amount thereof is usually 0.1 to 8% by weight based on the weight of the UV curable resin. It is about 0.1 to 4% by weight, and the selection and addition amount of these photoinitiators are well known in the art, and thus, in the present specification, the weight of the UV curable resin is included in the present specification without specific consideration of the addition amount thereof.

In addition, when referring to the curing conditions, irradiated with a wavelength of 350 ~ 400nm, using a mercury lamp or xenon lamp of 700 ~ 1300mJ, typically 700 ~ 1000mJ, about 1 ~ 60 seconds, generally 10 ~ 30 seconds To the extent the UV hard coat layer is cured.

Hereinafter, the present invention will be described in more detail with reference to the following examples.

Example 1:

The lens for LEDs of the epoxy resin of the form as shown in FIG. 3 was injection-molded, 92 weight% of epoxy acrylate monomers and oligomers (including 3.5 weight% of alpha-hydroxy ketones as photoinitiators), and (YGd) as yellow phosphors A mixture of 3 Al 5 O 12 : Ce 8% by weight was applied to the upper surface of the LED lens and irradiated for 30 seconds at an irradiation dose of 890 mJ using a xenon lamp to form a UV coating layer for LED color conversion having a thickness of 58 μm.

The LED lens produced as described above was mounted on a blue LED and used to obtain a slightly yellowish white light.

Example 2:

The lens for LEDs of epoxy resin was injection-molded, 92 weight% of epoxy acrylate monomers and oligomers (including 3.5 weight% of alpha-hydroxy ketone as a photoinitiator), and (YGd) 3 Al 5 O 12 : Ce 6 as yellow phosphors A mixture of 2% by weight of polymethyl methacrylate (refractive index of 1.50, light transmittance of 91%) having an average particle diameter of 2.0 μm as a light diffusing body was applied to the upper surface of the lens for LEDs described above, and an irradiation dose of 890 mJ was obtained using a xenon lamp. Irradiation for 30 seconds to form a UV coating layer for LED color conversion of 85㎛ thickness.

As a result of mounting and using the LED lens manufactured as described above on a blue LED, white light was obtained.

Example 3:

87% by weight of the urethane acrylate monomer and oligomer (including 1.8% by weight of phenylglyoxylate as photoinitiator) on the smooth top surface of the epoxy LED lens, 7% by weight of Y 2 O 2 S: Eu, Gd as a red phosphor and ZnS as a green phosphor : 3% by weight of Cu, Al and 3% by weight of polymethyl methacrylate having an average particle diameter of 2.0 μm as a light diffusing body, as in Example 1, a UV coating layer for LED color conversion on the smooth upper surface of the LED lens Formed.

As a result of mounting and using the LED lens manufactured as described above on a blue LED, white light was obtained.

Example 4:

92.5 wt% of acrylic acrylate monomer and oligomer (including 1.5 wt% of phenylglyoxylate as photoinitiator) on the top surface of epoxy LED lens, 3 wt% of LiAlO 2 : Mn as red phosphor and Y 3 (Ga x Al) as green phosphor 1-x ) 5 O 12 : 2% by weight of Ce (0 <x <1), 1% by weight of BaMgAl 10 O 17 as a blue phosphor, and 1.5% by weight of polymethyl methacrylate having an average particle diameter of 2.0 μm as a light diffuser Except that was formed in the same manner as in Example 1 UV coating layer for LED color conversion on the smooth upper surface of the LED lens.

As a result of mounting and using the LED lens manufactured as described above on a purple LED, white light was obtained.

Example 5:

95 wt% of polyester acrylate monomer and oligomer (including 2.5 wt% of alpha-hydroxy ketone as photoinitiator) and Sr 2 Ga 2 S 5 : Eu as yellow phosphor on the entrance surface of the light guide plate of the type as shown in FIG. 5. 2+ 5 wt% of the mixture was applied and irradiated for 20 seconds with an irradiation dose of 1000 mJ using a xenon lamp to form a UV coating layer for LED color conversion having a thickness of 96 μm.

White light was obtained when the backlight unit using the light guide plate for color conversion manufactured as described above and the backlight using the blue LED were observed.

Example 6:

On the exit surface of the light guide plate of the type shown in FIG. 6, 88 weight% of epoxy acrylate monomers and oligomers (including 3.5 weight% of alpha-hydroxy ketones as photoinitiators), and 5 weight% of Li 2 TiO 3 : Mn as red phosphors And a mixture of 4 wt% Ca 2 MgSi 2 O 7 : Cl as a green phosphor and 3 wt% of a polycarbonate (refractive index: 1.59) having an average particle diameter of 3.0 μm as a light diffuser, and an irradiation dose of 1000 mJ using a xenon lamp. Irradiation for 28 seconds to form a UV coating layer for LED color conversion of 150㎛ thickness.

As a result of observing backlighting using a backlight unit and a blue LED using the light conversion plate manufactured as described above, white light having high luminance was obtained.

Example 7:

The exit surface in the form of a light guide plate as shown in Figure 7, an epoxy acrylate monomer and oligomer 86% by weight (including a photoinitiator, 2.2% by weight of phenyl-glyoxylic rate) and, LiAlO 2 as a red phosphor: Mn 5% by weight of a green phosphor As Y 3 (Ga x Al 1-x ) 5 O 12 : 4% by weight of Ce (0 <x <1), 3% by weight of BaMgAl 10 O 17 as a blue phosphor, polymethylmetha with an average particle diameter of 2.0 μm as a light diffuser A mixture of 2% by weight of acrylate was applied and irradiated for 25 seconds at an irradiation dose of 1000 mJ using a xenon lamp to form a UV coating layer for LED color conversion having a thickness of 100 μm.

As a result of observing backlighting using the backlight unit and the ultraviolet LED using the light conversion plate manufactured as described above, white light having high luminance was obtained.

Example 8:

The exit surface in the form of a light guide plate as shown in Figure 7, the urethane acrylate monomer and oligomer 79% by weight (including a photoinitiator, 3.5% by weight of alpha-hydroxy ketone) and, LiAlO 2 as a red phosphor: Mn 8% by weight of a green phosphor As a Y 3 (Ga x Al 1-x ) 5 O 12 : Ce (0 <x <1) 7% by weight, a mixture of BaMgAl 10 O 17 6% by weight as a blue phosphor, and the irradiation dose using a xenon lamp Irradiation at 1000 mJ for 25 seconds to form a UV coating layer for LED color conversion of 120 ㎛ thickness.

As a result of observing backlighting using the backlight unit and the purple LED using the light conversion plate manufactured as described above, white light having high luminance was obtained.

Example 9:

Injection molding the LED lens for the epoxy resin, and an epoxy acrylate monomer and oligomer 42 wt% - (YGd) as the (alpha as photoinitiator hydroxy ketone 5.5% by weight is included), a yellow fluorescent material 3 Al 5 O 12: Ce 46 12% by weight of a polymethyl methacrylate (refractive index of 1.50, light transmittance of 91%) having an average particle diameter of 2.0 μm as a light diffusing body was applied to the upper surface of the lens for LEDs described above, and the irradiation dose was 890 mJ using a xenon lamp. Irradiation for 30 seconds to form a UV thin film coating layer for LED color conversion of 63㎛ thickness.

As a result of mounting and using the LED lens manufactured as described above on a blue LED, white light was obtained.

Example 10:

45% by weight of the urethane acrylate monomer and oligomer (including 6.8% by weight of phenyl glyoxylate as photoinitiator) on the smooth bottom of the epoxy LED lens in the form of a convex lens and a top of the surface, and Y 2 O 2 S as a red phosphor. : LED in the same manner as in Example 9, except that 27 wt% of Eu, Gd, 23 wt% of ZnS: Cu, Al as green phosphors, and 5 wt% of polymethyl methacrylate having an average particle diameter of 2.0 μm were used as the light diffusing body. A UV thin film coating layer for LED color conversion having a thickness of 38 μm was formed on the smooth bottom surface of the lens.

As a result of mounting and using the LED lens manufactured as described above on a blue LED, white light was obtained.

Example 11:

40.0% by weight of acrylic acrylate monomer and oligomer (including 7.5% by weight of phenylglyoxylate as photoinitiator) on the smooth top surface of epoxy LED lens, 20% by weight of LiAlO 2 : Mn as red phosphor and Y 3 (Ga x Al as green phosphor) 1-x ) 5 O 12 : 15% by weight of Ce (0 <x <1), 15% by weight of BaMgAl 10 O 17 as a blue phosphor, and 10% by weight of polymethyl methacrylate having an average particle diameter of 2.0 μm as a light diffuser A UV coating layer for LED color conversion having a thickness of 56 μm was formed on the smooth upper surface of the LED lens in the same manner as in Example 9.

As a result of mounting and using the LED lens manufactured as described above on a purple LED, white light was obtained.

Example 12:

5 wt% of polyester acrylate monomer and oligomer (including 6.5 wt% of alpha-hydroxy ketone as photoinitiator) and Sr 2 Ga 2 S 5 : Eu as yellow phosphors on the incidence surface of the light guide plate of the type as shown in FIG. 5. 2+ 35% by weight, a mixture of 5% by weight of polymethyl methacrylate having an average particle diameter of 2.0 μm as a light diffusing body, and irradiated for 20 seconds at an irradiation dose of 1000 mJ using a xenon lamp for LED color conversion having a thickness of 72 μm A UV coating layer was formed.

White light was obtained when the backlight unit using the light guide plate for color conversion manufactured as described above and the backlight using the blue LED were observed.

Example 13:

On the exit surface of the light guide plate of the form as shown in FIG. 6, 55 weight% of epoxy acrylate monomer and oligomer (including 3.5 weight% of alpha-hydroxy ketone as a photoinitiator), and 25 weight% of Li 2 TiO 3 : Mn as a red phosphor And a mixture of 15 wt% Ca 2 MgSi 2 O 7 : Cl as a green phosphor and 5 wt% of a polycarbonate having an average particle diameter of 3.0 μm as a light diffuser, and an irradiation dose of 1000 mJ using a xenon lamp. Irradiation for 28 seconds to form a UV coating layer for LED color conversion of 150㎛ thickness.

As a result of observing backlighting using a backlight unit and a blue LED using the light conversion plate manufactured as described above, white light having high luminance was obtained.

Example 14:

The incident surface of the shape of the light guide plate as shown in Figure 7, an epoxy acrylate monomer and oligomer 50 and the weight% (with a photoinitiator and 7.2% by weight of phenyl-glyoxylic rate), LiAlO 2 as a red phosphor: Mn 25% by weight of a green phosphor As Y 3 (Ga x Al 1-x ) 5 O 12 : 12% by weight of Ce (0 <x <1), 10% by weight of BaMgAl 10 O 17 as a blue phosphor, polymethylmetha with an average particle diameter of 2.0 μm as a light diffuser A mixture of 3% by weight of acrylate was applied and irradiated for 25 seconds at an irradiation dose of 1000 mJ using a xenon lamp to form a UV coating layer for LED color conversion having a thickness of 48 μm.

As a result of observing backlighting using the backlight unit and the ultraviolet LED using the light conversion plate manufactured as described above, white light having high luminance was obtained.

1, 1a: UV coating composition (or coating layer) for LED color conversion according to the present invention
2: UV curable matrix resin 3a, 4a: pigment
3b, 4b: light diffuser (bead) 3c, 4c: phosphor
5: Substrate 6: LED element molding light diffusion lens
7: annular side 7a: top
7b: inner convex portion 8: flange
9: LED mounting
10,10a, 10b: light guide plate
11: exit face 12: entrance face
13: bottom 14: prism pattern
14a and 14b: prism slope 15: light source portion
18: Internal Prism Pattern 19: Blue, Purple, or Ultraviolet LED
20: reflective sheet 30: prism sheet
40: light diffusion sheet 50: protective sheet
100,100a, 100b: backlight unit

Claims (10)

UV coating composition for LED color conversion consisting of 25 to 97% by weight of UV-curable resin, and 3 to 75% by weight of phosphor for color conversion. UV coating for LED color conversion comprising 25 to 96.99% by weight of UV-curable resin, 3 to 65% by weight of phosphor for color conversion, and 0.01 to 10.0% by weight of light diffusing beads having an average particle diameter of 0.2 to 30 µm. Composition. The UV for LED color conversion according to claim 1 or 2, wherein the UV curable resin is at least one resin selected from the group consisting of urethane acrylate, epoxy acrylate, polyester acrylate, and acrylic acrylate. Coating composition. The color conversion phosphor according to claim 1 or 2, wherein the color conversion phosphor is a YAG-based (YGd) 3 Al 5 O 12 : Ce or Sr 2 Ga 2 S 5 : Eu 2+ yellow phosphor. UV coating composition for LED color conversion. The method of claim 1 or 2, wherein the phosphor for color conversion is a red phosphor and a green phosphor, and the red phosphor is Y 2 O 2 S: Eu, Gd, Li 2 TiO 3 : Mn, LiAlO 2 : Mn , 6MgO and As 2 O 5: Mn 4 + , or and 3.5MgO 0.5MgF 2 and GeO 2: Mn 4 +, and wherein the green phosphor is ZnS: Cu, Al, Ca 2 MgSi 2 O 7: Cl, Y 3 (Ga x Al 1- x ) 5 O 12 : Ce (0 <x <1), La 2 O 3 .11Al 2 O 3 : Mn, or Ca 8 Mg (SiO 4 ) 4 C l2 : Eu, Mn, UV coating composition for converting blue LED to white LED. The UV coating composition for LED color conversion according to claim 5, wherein the weight ratio of the red phosphor and the green phosphor is 1: 0.2 to 1.2. The method of claim 1 or 2, wherein the color conversion phosphors are red phosphors, green phosphors and blue phosphors, and the red phosphors are Y 2 O 2 S: Eu, Gd, Li 2 TiO 3 : Mn, LiAlO. 2 : Mn, 6MgO.As 2 O 5 : Mn 4+ , or 3.5MgO.0.5MgF 2 .GeO 2 : Mn 4+ , and the above-mentioned green phosphor is ZnS: Cu, Al, Ca 2 MgSi 2 O 7 : Cl , Y 3 (Ga x Al 1-x ) 5 O 12 : Ce (0 <x <1), La 2 O 3 11Al 2 O 3 : Mn, or Ca 8 Mg (SiO 4 ) 4 C l2 : Eu, Mn, wherein the blue phosphor is BaMgAl 10 O 17 or (Sr, Ca, BaMg) 10 (PO 4 ) 6 Cl 2 : Eu, wherein the UV coating composition for LED color conversion converts a purple LED or an ultraviolet LED into a white LED. The UV coating composition for LED color conversion according to claim 7, wherein the weight ratio of the red phosphor, the blue phosphor, and the green phosphor is 1: 0.2 to 1.2: 0.2 to 1.2. The UV coating composition for LED color conversion according to claim 1 or 2, wherein the pigment further comprises 0.1 to 3.0% by weight. The LED color conversion device according to claim 2, wherein the light diffuser is composed of a light diffuser mixture having a weight ratio of 1: 0.4 to 0.8: 0.1 to 0.3 with an average particle diameter of 1 to 4 µm: 5 to 10 µm: 11 to 30 µm. UV coating composition.
KR1020100077397A 2010-08-11 2010-08-11 Color changing ultraviolet coating composition for light emitting diode KR20120021633A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130133994A (en) * 2012-05-30 2013-12-10 엘지이노텍 주식회사 Optical member, light emitting device and display device
KR101508963B1 (en) * 2012-12-28 2015-04-07 손재설 Chip on Board Type LED Module
KR20170033491A (en) * 2015-09-16 2017-03-27 엘지디스플레이 주식회사 Ink Composition for Light Guiding Pattern and Light Guide Plate and Backlight Unit using the same
CN108148474A (en) * 2017-12-15 2018-06-12 广州前延新材料发展有限公司 It is a kind of for composite coating of marine settings and its preparation method and application

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130133994A (en) * 2012-05-30 2013-12-10 엘지이노텍 주식회사 Optical member, light emitting device and display device
KR101508963B1 (en) * 2012-12-28 2015-04-07 손재설 Chip on Board Type LED Module
KR20170033491A (en) * 2015-09-16 2017-03-27 엘지디스플레이 주식회사 Ink Composition for Light Guiding Pattern and Light Guide Plate and Backlight Unit using the same
CN108148474A (en) * 2017-12-15 2018-06-12 广州前延新材料发展有限公司 It is a kind of for composite coating of marine settings and its preparation method and application
CN108148474B (en) * 2017-12-15 2020-12-29 广州前延新材料发展有限公司 Composite coating for marine equipment and preparation method and application thereof

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