KR20100029878A - Planar type led lamp - Google Patents

Abstract

PURPOSE: A planar type an LED lamp is provided to obtain a white light from a blue LED or a ultraviolet-ray LED by installing a fluorescent plate and a light diffusion plate with mixture of a fluorescent substance and light diffusing agent. CONSTITUTION: A dot-type light-emitting diode module plate(10) has a plurality of mounting holes. A plurality of LED mount units are installed in matrix comprised of row and column. A plurality of LEDs or the LED chip are installed on mounting unit and connected to the printed circuit board(40). A transparent lighting plate(30) emits the light which is changed from a fluorescent plate to the outside.

Description

Flat type LED lighting lamp {PLANAR TYPE LED LAMP}

The present invention relates to an LED (Light Emitting Diode) light, and more particularly, a phosphor for converting illumination colors into a heat-resistant transparent resin matrix on a front surface of a dot type LED module plate installed in a matrix form. And / or by installing an optical color-converting fluorescent plate and a light diffusing plate incorporating an optical diffuser, it is simple and easy to obtain from a long-life high-brightness blue LED, a purple LED or an ultraviolet LED without using a relatively short-lived and expensive high-brightness white LED. In addition, it is possible to obtain white light to yellow white light at low cost, and there is no need to strictly distribute or coat the illumination color conversion phosphor by the scattering effect of the light diffuser, and effectively prevent the glare caused by the high brightness LED light. Regarding the flat type LED lighting that can relax and get more gentle and comfortable lighting All.

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 high light conversion efficiency, and is small in size, thin and Suitable for light weight, yet infinitely scalable installation, very long lifetime semi-permanently (approximately 100,000 hours for blue, purple, or UV LEDs, approximately 30,000 hours for white LEDs), no thermal or discharge light emission Very fast response speed with no preheating, very simple lighting circuit, no discharge gas and filament, high impact resistance, safe and low environmental pollution, high repetition pulse operation It has the advantage of less fatigue of the optic nerve and full color, so mobile phones, camcorders, Light source for liquid crystal display (LCD) back light, such as digital cameras and personal digital assistants (PDAs), signal lamps, electronic signs, vehicle headlights and taillights, various electronic devices, office equipment, fax machines, etc. It is widely used for night light of remote control or surveillance camera, infrared communication, information display of outdoor billboard by various combination of red and green pixels, high precision electronic display, high quality indoor and outdoor lighting. As the high-brightness LED that improves the low-brightness problem, which was a problem, is commercially available on a commercial scale, its use and use are rapidly expanding.

In particular, since white LEDs are very useful for liquid crystal display (LCD) back light sources and indoor / outdoor lighting, the use frequency is rapidly increasing, and the lighting market does not last as long as the trend of ousting 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 the excited light excites the phosphor to produce light of different wavelengths, which is mixed with the light produced by the single LED chip to obtain white light.

However, this 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. There is a problem that the life of the LED is significantly shortened to about one third or less. In particular, there is a problem that the emission color becomes uneven if a very homogeneous coating or dispersion distribution of the phosphor is not achieved. There is a serious problem that it is quite difficult to achieve.

The oldest type of white LED widely used is coated or molded with a yellow phosphor (typically yttrium-aluminum-garnet: Y3Al5O12: Ce, YAG-based compound) on an InGaN-based blue LED having a wavelength of 450 nm. Blue light 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 broad peak by the YAG-based yellow phosphor to the human eye. This technique, which is recognized as white light, is disclosed in US Pat. No. 5,998,925 to Nichia.

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, the blue LED exhibits the highest efficiency for an excitation light source of about 405 nm, while the YAG phosphor is excited by blue light of 450 to 460 nm, which causes a problem of low luminance, particularly for coating or molding YAG phosphors. Since it is difficult to guarantee homogeneous and uniform dispersibility, the uniformity and reproducibility of the product is low in the luminance and spectral distribution of white light, and the LED life is significantly shortened.

In addition, there is a difficulty in having a high uniformity and reproducibility of the product using a constant dispersion using a dot-type LED module plate of the matrix form in a flat LED lighting using a conventional LED.

Accordingly, an object of the present invention is to provide a high brightness blue LED or a purple LED or optionally an ultraviolet LED with a long life (approximately 100,000 hours of service life) without using a conventional high brightness white LED having a relatively short lifetime (about 30,000 hours of service life). It is to provide a flat type LED lighting lamp that can significantly increase the life of the white light emitting LED lighting device by simply and easily obtaining the white light to yellow-white light for lighting.

Another object of the present invention is that the dot-shaped LED module plate is in the form of a square plate having a lattice-shaped LED mounting unit, so as to match a bar, square or rectangular lighting of various sizes. It can be used by cutting to provide a flat type LED lighting that increases the ease of use.

Still another object of the present invention is to provide a user or a builder who is not a producer to easily adjust the white light to a desired intensity easily and at low cost, or to use a relatively low-cost blue LED, purple LED, or ultraviolet LED instead of the existing expensive high-brightness white LED. Using to provide a flat type LED lighting that can obtain a gentle white light.

Still another object of the present invention is to provide a flat LED lighting lamp that can effectively and easily eliminate the problem of occurrence of uneven distribution of light emission hue due to uneven distribution of the phosphor for illumination color conversion or coating.

Another object of the present invention is to effectively reduce the glare caused by high-brightness white LED light to obtain a more gentle and comfortable lighting, and to provide a flat-type LED lighting lamp that can reduce the deterioration of lighting equipment due to excellent heat resistance To provide.

In order to achieve the above object, the flat type LED lighting lamp according to the present invention includes a dot-type LED module plate having a plurality of mounting holes such that a plurality of LED mounting units are installed in a matrix form in rows and columns; A plurality of LEDs or LED chips mounted on the LED mounting unit and electrically connected to a power source; An illumination color conversion fluorescent plate for converting emission colors emitted from the plurality of LEDs or LED chips installed on the dot-type LED module plate; Characterized in that it comprises a transparent light emitting plate for emitting the light emitted by the conversion is converted in the fluorescent color conversion plate for the outside.

Here, the dot-type LED module plate is preferably cut into at least one LED unit unit to form a flat type LED lighting.

In addition, a light diffusion plate is interposed between the illumination color conversion fluorescent plate and the LED module plate or between the transparent light emitting plate and the illumination color conversion fluorescent plate so that the light emission color conversion is performed by scattering the illumination color conversion fluorescent plate.

In addition, the LED or the LED chip is preferably connected to the power source by wiring to the "+" and "-" lattice electrode plate formed before and after the LED module plate, respectively.

In addition, each of the LED mounting unit is preferably formed in the inner end portion corresponding to each mounting hole of the dot-type LED module plate.

In addition, it is preferable that a reflecting plate is further formed at the rear and side portions of the LED module plate.

In addition, it is preferable that the fluorescent plate for illumination color conversion is uniformly dispersed in the matrix resin and the phosphor, and the light diffuser is also uniformly dispersed in the matrix resin.

In addition, the illumination color conversion fluorescent plate and the light diffusion plate may be integrally formed.

In addition, the matrix resin may be a silicone resin, polymethyl pentene resin, polyether sulfon resin, polyether imide resin, polyarylate resin, and poly It is preferable that it is 1 type of heat resistant transparent matrix selected from the group which consists of a methyl methacrylate resin.

In addition, it is preferable that the illumination color conversion phosphor is a YAG-based (YGd) 3 Al 5 O 12: Ce yellow phosphor for converting a blue LED into a white LED.

In addition, the illumination color converting phosphor is a red phosphor and a green phosphor, and the above-mentioned red phosphor is Y2O2S: Eu, Gd, Li2TiO3: Mn, LiAlO2: Mn, 6MgO · As2O5: Mn4 +, or 3.5MgO · 0.5MgF2 · GeO2: Mn4 + Wherein the green phosphor is ZnS: Cu, Al, Ca2MgSi2O7: Cl, Y3 (GaxAl1-x) 5O12: Ce (0 <x <1), La2O3.11Al2O3: Mn, or Ca8Mg (SiO4) 4Cl2: Eu, Mn As a preference, it is preferable for the conversion of the blue LED to the white LED.

Further, the illumination color conversion phosphors are red phosphors, green phosphors and blue phosphors, and the red phosphors are Y2O2S: Eu, Gd, Li2TiO3: Mn, LiAlO2: Mn, 6MgO · As2O5: Mn4 +, or 3.5MgO.0.5MgF2. GeO2: Mn4 +, wherein the green phosphor is ZnS: Cu, Al, Ca2MgSi2O7: Cl, Y3 (GaxAl1-x) 5O12: Ce (0 <x <1), La2O3.11Al2O3: Mn, or Ca8Mg (SiO4) 4Cl2: Eu, Mn, and the above-mentioned blue phosphor is BaMgAl10O17 or (Sr, Ca, BaMg) 10 (PO4) 6Cl2: Eu, which is preferable for converting a purple LED or an ultraviolet LED to a white LED.

In addition, the light diffusing body is a silicone resin (refractive index 1.43), polyacrylate (polyacrylate: refractive index 1.49), polyurethane (polyurethane: refractive index 1.51), polyethylene (polyethylene: refractive index 1.54), polypropylene (polypropylene: refractive index 1.46 ), Nylon (Nylon: refractive index 1.54), polystyrene (polystyrene: 1.59), polymethylmethacrylate (polymethylmethacrylate: 1.49), polycarbonate (polycarbonate: 1.59), silica (silica: 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: refractive index 1.56), barium sulfate (BaSO4: refractive index 1.63), oxide Zinc (ZnO: refractive index 2.03), cesium oxide (CeO2: refractive index 2.15), titanium dioxide (TiO2: refractive index 2.50 to 2.71), iron oxide (2.90), or any mixture thereof, and when the light diffuser is a resin, A heat resistant transparent plum Riggs resin and the same resin is preferably not.

According to the flat LED lighting according to the present invention configured as described above, the phosphor and / or optical diffuser for illumination color conversion in a heat-resistant transparent resin matrix (matrix) in front of the dot (dot) LED module plate installed in a matrix form By installing the mixed-color fluorescent plate and light diffusion plate, it is simple and inexpensive from long-life high-brightness blue LED, purple LED or ultraviolet LED without using relatively short-lived and expensive high-brightness white LED. In addition to obtaining light, there is no need to strictly distribute or coat the phosphor for illumination color conversion by the scattering effect of the light diffuser, and effectively alleviate the glare caused by the high-brightness LED light, making it more gentle and comfortable. The effect is to get the lighting.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

1 is a schematic exploded perspective view of a flat panel LED lighting according to the present invention, Figure 2 is an enlarged view of the LED module plate of the flat panel LED lighting according to the present invention, Figure 3 is a flat type LED lighting lamp according to the present invention FIG. 4 is a schematic cross-sectional view, and FIG. 4 will be described together for convenience as an enlarged schematic view of an illumination color conversion fluorescent plate and a light diffusion plate sheet or film applied to FIG. 1.

As shown, the flat LED lamp (not shown) according to the present invention, the dot-type LED module is a plurality of mounting holes 13 so that a plurality of LED mounting unit 11 is installed in a matrix form A plate 10, a plurality of LEDs 12 mounted on the LED mounting unit 11 and electrically connected to the printed circuit board 40, and an illumination color for converting the color of light emitted from the LEDs 12. Conversion fluorescent plate 20, a transparent light emitting plate 30 for emitting light emitted and converted by the illumination color conversion fluorescent plate 20, the LED module plate 10, the illumination color conversion fluorescent plate ( 20) and the rectangular housing 60 for accommodating and fixing the transparent light emitting plate 30 therein.

Here, the transparent light emitting plate 30 for emitting the light to the outside is preferably a transparent material such as acrylic, glass or PVC, the housing 60 is made of a substantially thin rectangular box shape simply attached to the wall surface It is preferable to be inserted into the groove formed in the wall to be installed.

In addition, in the illustrated example, the transparent light emitting plate 30 and the fluorescent color converting plate 20 have separate shapes, but the phosphor or light diffuser (powder or sheet) to be described below is integrally applied to the transparent light emitting plate. It may be formed, but the present invention is not limited thereto.

In addition, the illumination color conversion is selectively performed by scattering through the light diffusion plate 21 between the illumination color conversion fluorescent plate 20 and the LED module plate 10 or between the transparent light emitting plate 30 and the illumination color conversion fluorescent plate 20. The fluorescent plate 20 can perform sufficient light emission color conversion.

In addition, the reflective module 50 is formed on the rear side of the LED module plate 10 and the printed circuit board 40 to selectively reflect the light emitted to the rear side to the front side to perform a function as a heat sink. It is.

The dot-type LED module plate 10 is in the form of a substantially rectangular lattice plate, and a plurality of lattice-shaped mounting holes such that a plurality of rectangular LED mounting units 11 are arranged in rows and columns in a matrix form. 13, the plurality of LEDs 12 are electrically connected in a dot form to the printed circuit board 40 through the circular holes 11a of the LED mounting unit 11.

The mounting hole 13 has a substantially square shape in the illustrated example, but may have various shapes such as a circle, an ellipse, or a polygon such as a triangle, a rectangle, a pentagon, a rhombus, and the like.

Here, even if a large number of LEDs 12 are formed sparingly, the LEDs 12 may be attached to all the LED mounting units 11 because sufficient brightness may be exhibited through the fluorescent plate 20 and the light diffusion plate 21 for converting the illumination colors. There is no need to install it.

In addition, in the illustrated example, a plurality of LEDs 12 are mounted through circular holes 11a (circular grooves, elliptical or polygonal grooves (triangle, square, pentagon, etc.) of the LED mounting unit 11). Although various types of LED attachment structures are possible, the printed circuit board 40 electrically connected to the LEDs 12 is also mounted on the front and rear surfaces of the dot-type LED module plate 10. That is, a plurality of LEDs 12 mounted as a structure for connecting " + " and "-" lattice-shaped electrode plates 41 and 42, respectively, before and after the dot-shaped LED module plate 10 in a matrix form. ) To supply power. In the illustrated example, the "+" and "-" lattice type electrode plates 41 and 42 have a printed circuit board 40 structure formed before and after the LED module plate 10, but various types of printed circuit boards are shown. A structure (simply including a power wiring connection structure of "+" and "-" electrodes) is also possible and does not limit the structure and type in the present invention.

On the other hand, since the dot-type LED module plate 10 is in the form of a square plate having a lattice-shaped LED mounting unit 11, square or rectangular lighting lamps of various sizes {transparent] The light emitting plate 30 can be cut and used to meet the convenience of use.

The fluorescent color plate 20 for converting the illumination color is also in a substantially rectangular plate shape and is spaced a predetermined distance in front of the dot type LED module plate 10 on which the plurality of LEDs 12 are mounted in the housing 60. It is attached. Therefore, as will be described later, the LED 12 according to the present invention housing the appropriate illumination color conversion fluorescent plate 20 according to the present invention irrespective of the predetermined color tone, such as blue LED, purple LED, ultraviolet LED, white LED. The light emission color can be converted simply and easily by just inserting it inside.

On the other hand, the upper surface of the transparent light emitting plate 30 made of a transparent material such as acrylic, glass, or PVC to emit light to the outside has a form of a smooth surface, but the upper surface of the comb pattern or a plurality of It may be in the form of a dot top surface. In addition, it may be a shape having an opening in the center of the upper surface if necessary, may be a convex shape projecting forward, a smooth surface or a concave surface, or may be any other shape.

As illustrated in FIG. 4, the fluorescent plate 20 and the light diffusion plate 21 for converting illumination colors are manufactured in the form of a sheet or a film, respectively.

That is, the phosphor 20b and the pigment 20c are homogeneously dispersed in the matrix resin 20a in the illumination color conversion fluorescent plate 20, and the light diffusion plate 21 is also the matrix resin 21a. The light diffuser (bead) 21b and the pigment 21c are homogeneously dispersed in the inside.

Here, in the illustrated example, although the fluorescent plate 20 and the light diffusing plate 21 for illumination color conversion are formed in the form of two sheets or films separated, the pigment, the phosphor and the light diffuser are uniformly dispersed in the above-described matrix resin. Of course, it can be made in the form of one sheet or film.

As can be seen from FIG. 4, the fluorescent plate 20 and the light diffusing plate 21 for illumination color conversion are applied to a flat panel LED lamp independently without touching the light emitting LEDs themselves, and the light emitting colors of the LEDs are simple and inexpensive. Can be converted from blue, purple, and ultraviolet light to white light to yellow white light, and the phosphor 20b of the fluorescent plate 20 for illumination color conversion by scattering by the light diffuser (bead) 21b of the optical diffuser 21. ) Makes it possible to perform sufficient light emission color conversion, so that the strictly homogeneous distribution of the phosphor is not particularly a problem, and it can remarkably reduce or alleviate eye sting and fatigue caused by the high brightness of the LED when looking directly at a light source. .

Also, if necessary, a dichroic filter having a refractive index of 1.4 to 1.6 may be disposed on the bottom surface of the optical diffuser 21 as described above, for example, to allow light having a wavelength of 500 nm or less and reflect light having a wavelength longer than that. have. The dichroic filter contributes to the stabilization of the light emitting module by forming a dielectric layer such as neodymium or holmium on the upper surface of the phosphor, thereby reducing the damage of the LED device due to backscattering of the light by the phosphor. It is also possible to increase the service life of the.

As the above-mentioned matrix resins 20a and 21a, 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, as the preferred heat resistant transparent matrix resin, silicone resins are preferred. , Polymethyl pentene resin, polyether sulfon resin, polyether imide resin, polyarylate resin, or polymethyl methacylate resin. The amount of these matrix resins added may range from 50 to 99% by weight, preferably from 82 to 97% by weight, based on the total weight of the composition.

When the content of these heat-resistant transparent matrix resin is less than 50% by weight based on the total weight of the composition, transparency may be inferior, and the luminance may be excessively lowered due to the halo effect caused by scattering. In this case, there is a concern that the light color change effect is insufficient or the degree of alleviation of the glare due to high brightness is insufficient.

All of the above-mentioned resins are those known in the art as heat-resistant transparent resins, so the description thereof will be omitted.

On the other hand, as the phosphor 20b for illumination color conversion into white light applicable to the present invention, only a YAG-based yellow phosphor known in the art may be used when a blue LED is used, and preferably a green phosphor and a red phosphor are used. It is preferable in that it can obtain 3 wavelengths of natural white light, and when using a purple LED or an ultraviolet LED, it is preferable to use a green fluorescent substance, a red fluorescent substance, and a blue fluorescent substance 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 developed by Nichia, and the above-mentioned YAG yellow phosphor is excited at 550 to 560 nm.

On the other hand, when using the blue LED (425 nm to 475 nm wavelength region) and the green phosphor and the red phosphor and blue phosphor, the present invention is not limited thereto, but various ones known in the art can be used 430 nm to 480 nm Examples of red phosphors that can be excited in the wavelength range of include Y2O2S: Eu, Gd, Li2TiO3: Mn, LiAlO2: Mn, 6MgO · As2O5: Mn4 +, or 3.5MgO.0.5MgF2.GeO2: Mn4 +, and 515 nm-. Examples of green phosphors that can be excited in the wavelength region of 520 nm include ZnS: Cu, Al, Ca2MgSi2O7: Cl, Y3 (GaxAl1-x) 5O12: Ce (0 <x <1), La2O3 · 11Al2O3: Mn, Ca8Mg (SiO4 ) 4Cl2: 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 LEDs described above are stable in oxide form and have an extended lifetime.

In the present invention, the above-mentioned green phosphor and red phosphor are mixed at an appropriate ratio and directly coated directly or indirectly on a blue LED chip to obtain 3-wavelength white light, and are mounted as a separate member thereof without being directly related to the LED. It is to be noted that 3-wavelength white light is obtained by forming a film or sheet of the fluorescent plate 20 for illumination color conversion.

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 when the emission peak wavelength is about 670 nm, LiAlO 2: Mn is preferable and the emission peak wavelength is about 650 nm. In the case of nm, 6MgO.As2O5: Mn4 + is preferable, and in the case where the emission peak wavelength is about 650 nm, 3.5MgO.0.5MgF2.GeO2: Mn4 + is preferable.

Among the red and green phosphors described above, 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 (GaxAl 1-x) 5 O 12: Ce (0) when the emission peak wavelength is about 516 nm. <x <1) is preferred, and Ca8Mg (SiO4) 4Cl2: Eu, Mn is preferred when the emission peak wavelength is about 515 nm.

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 the purple LED or the ultraviolet LED, in addition to the green phosphor and the red phosphor, 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.

It is a matter of course that the white light obtained can be appropriately adjusted within the range of 3200 to 7500K according to the needs of the consumer by appropriate combination of red, blue and green phosphors.

The content of the red phosphor, the blue phosphor, the green phosphor, or a combination thereof is 0.8 to 30% by weight, preferably 2.0 to 15% by weight, based on the total weight of the composition, and red phosphor and green phosphor may be used for the blue LED. In this case, the weight ratio is 1: 0.2 to 1.2, preferably 1: 0.3 to 0.8, and the weight ratio when using the red phosphor, the blue phosphor, and the green phosphor with respect to the purple LED or the ultraviolet LED is also 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 phosphor is less than 0.8 wt% based on the total weight of the composition, satisfactory white light may not be obtained. On the contrary, when the content of the phosphor exceeds 30 wt%, the luminance may be excessively lowered.

On the other hand, examples of the light diffuser 21b to be added include a silicone resin (refractive index 1.43), polyacrylate (refractive index 1.49), polyurethane (refractive index 1.51), polyethylene (polyethylene: 1.54 refractive index) , Homopolymers such as polypropylene (refractive index 1.46), nylon (Nylon: refractive index 1.54), polystyrene (polystyrene: 1.59), polymethylmethacrylate (refractive index 1.49), polycarbonate (polycarbonate: 1.59) Organic light diffusing agents such as copolymers of monomers thereof; 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 to 2.71), iron oxide (2.90), Or any mixture thereof, but preferred is an organic light diffusing agent, most preferred is polymethylmethacrylate in terms of high transparency, and by appropriate light diffusion intended not to add the same kind as the matrix resin. This is necessary in terms of ensuring sufficient excitation of the phosphor.

The light diffuser 21b has an average particle diameter of 0.2 to 30 μm, preferably 0.5 to 5 μm, and specifically 1.0 to 3.5 μm, and the amount of the light diffuser 21b is 0.2 to 20 wt% based on the total weight of the composition, Preferably it is 0.5-10 weight%, Specifically, 1.0-3.0 weight%.

If the average particle diameter of the light diffuser 21b is less than 0.2 µm, transparency or light transmittance may be inferior, and if the average particle diameter exceeds 30 µm, the excitation of the phosphor may be insufficient or uniform. Likewise not preferred.

If the amount of the light diffuser 21b added to the entire composition is less than 0.2% by weight, the excitation of the phosphor may be insufficient or uneven, which is not preferable. It is not preferable because there is a possibility of doing so.

In addition, rarely, inorganic or organic pigments may be included in an amount of 0.1 to 3.0% by weight, preferably 0.1 to 1.0% by weight, depending on the degree of preference such as illumination color.In view of transparency, organic pigments are preferable. 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, yellow pigments that give a warm feeling include monoazo, diazo, naphthalazobenzene, yellow wall, rhubarb or any mixed pigments thereof, but these are optional in the present invention.

5A to 5C are schematic side cross-sectional views each showing an example of an LED mounting unit according to another embodiment of the present invention.

Here, instead of a large rectangular flat LED lamp having a matrix type LED module plate shown in FIG. 3, a large rectangular dot-shaped LED module plate is formed of a single LED unit unit and a plurality of LED unit units of a rod type. Or, it may be cut into a plurality of LED unit units of square or rectangular shape of a slightly smaller square shape, and can be cut and used to meet lighting of various sizes and various shapes. In this case, the fluorescent plate for converting the illumination color, light diffusing plate and reflecting plate is also directly cut together can be applied directly to the flat LED lighting, there is a great advantage that the ease of use is greatly increased.

First, as shown in FIG. 5A, the flat LED lighting lamp 100 according to another embodiment of the present invention includes an LED chip 112 having a "+" electrode plate 141 and a "" in the mounting hole 113. Are electrically connected and wired to the electrode plate 142, and the light-color conversion plate 120 and the light diffusion plate 121 are sequentially formed on the front surface thereof to form a rod, square, or rectangle. It can be used as a flat panel LED lamp by cutting the unit of a single or multiple LED units.

Here, the reflective plate 150 is formed at the rear side of the “−” electrode plate 142, but the reflective plate 150 may be replaced with the “−” electrode plate. In this case, there is an advantage that the LED chip 112 is more stably seated on the front surface of the reflector plate 150.

Of course, in the illustrated example, the "+" electrode plate 141 and the "-" electrode plate 142 as the printed circuit board (electrode plate) is separated from the front and rear of the LED module plate 110, two electrodes All the plates may be arranged together on the front or rear of the LED module plate (110).

Subsequently, in the flat LED lamp 200 according to another embodiment of the present invention shown in FIG. 5B, the LED chip 212 is stable to the "+" electrode plate 141 and the "-" electrode plate 142, respectively. It is substantially the same as that of FIG. 5A except that it is disposed and wired at an inner end portion corresponding to each mounting hole 213 of the dot-shaped LED module plate 210 for electrical connection.

Finally, in the flat LED lighting 300 according to another embodiment of the present invention shown in Figure 5c, the LED chip 312 is attached to the "+" electrode plate 341 and the "-" electrode plate 342 An additional reflector in a diagonal form to each mounting hole 313 is disposed and wired at an inner end of the dot-shaped LED module plate 310 corresponding to each mounting hole 313 for stable electrical connection. It is substantially the same as that of FIG. 5B except that 360 is extended to “-” electrode plate 242.

Although the present invention has been described in detail with reference to preferred embodiments according to the present invention, this is only for illustrating the present invention and is not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the scope of the present invention. It should be noted that this is possible as well as this is also within the scope of the present invention.

1 is a schematic exploded perspective view of a flat panel LED lighting according to the present invention.

Figure 2 is an enlarged view of the LED module plate of the flat LED lamp according to the present invention.

3 is a schematic cross-sectional view of the flat LED lamp according to the present invention.

FIG. 4 is an enlarged schematic view of an illuminating plate for converting illumination colors and a light diffusion plate sheet or film applied to FIG. 1.

Explanation of symbols on the main parts of the drawings

10: Dot-type LED module plate 11: LED mounting unit

11a: round hole 12: LED

20: tube for converting illumination color 20a, 21a: matrix resin

20b: phosphor 20c for illumination color conversion, 21c: pigment

21b: light diffuser 30: transparent light emitting plate

40: printed circuit board 50: reflecting plate

60: square housing

Claims (15)

Dot-type LED module plate having a plurality of mounting holes so that a plurality of LED mounting units are installed in a matrix form in rows and columns, A plurality of LEDs or LED chips mounted on the LED mounting unit and electrically connected to a power source; An illumination color conversion fluorescent plate for converting emission colors emitted from the plurality of LEDs or LED chips installed on the dot-type LED module plate; The flat type LED lamp, characterized in that consisting of a transparent light emitting plate for emitting the light emitted by the conversion is converted in the fluorescent plate for the color conversion. The method of claim 1, The dot (dot) LED module plate is cut into at least one LED unit unit flat LED lighting, characterized in that to form a flat LED lighting. The method of claim 1, A flat panel LED, characterized in that the light color conversion between the fluorescent color plate for converting the fluorescent light emitting plate and the LED module plate or between the transparent light emitting plate and the light color conversion fluorescent plate is interposed by the light emitting color conversion fluorescent plate is performed. Lighting. The method of claim 2, The LED or LED chip is a flat panel LED lamp, characterized in that connected to the power supply is wired to the "+" and "-" grating electrode plate formed before and after the LED module plate, respectively. The method of claim 4, wherein And each of the LED mounting units is formed at an inner end portion corresponding to each of the mounting holes of the dot-type LED module plate. The method of claim 1, Each mounting hole of the dot (dot) LED module plate is a flat-shaped LED lamp, characterized in that the cross-sectional shape is circular, elliptical or polygonal. The method of claim 3, wherein Flat panel LED lighting, characterized in that the reflector is formed in the rear of the LED module plate. The method of claim 7, wherein And the reflector is an electrode plate or a heat sink electrically connected to the power source. The method of claim 3, wherein The fluorescent color plate for the illumination color conversion is a homogeneous dispersion of the phosphor and pigment in the matrix resin, the light diffusion plate is a flat LED lamp, characterized in that the light diffuser and pigment is uniformly dispersed in the matrix resin . The method of claim 3, wherein Flat type LED lighting, characterized in that the illumination plate for converting the color and the light diffusion plate is formed integrally. The method of claim 9, And said matrix resin is a thermally transparent matrix. The method of claim 9, And said illumination color converting phosphor is a yellow phosphor for converting a blue LED into a white LED. The method of claim 9, And said illumination color converting phosphor is a red phosphor and a green phosphor for converting a blue LED into a white LED. The method of claim 9, And said illumination color converting phosphor is for converting a purple LED or an ultraviolet LED into a white LED as a red phosphor, a green phosphor, and a blue phosphor. The method of claim 1, Flat transparent LED lighting lamp, characterized in that the transparent light emitting plate and the illumination color conversion fluorescent plate is formed integrally.

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