KR101151203B1 - L e d or l e d assembly for sh owing freshness of meat and l e d lamp using the same - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a meat light emitting diode (LED) or an assembly thereof and an LED lamp using the same, wherein the meat's inherent color and contrast with marbling are highlighted and the highest freshness is exhibited. Or 0.310 ≦ x ≦ 0.340 and 0.300 ≦ y ≦ 0.320 or 0.370 ≦ y ≦ 0.400 in CIE (Commission Internationale d'Eclairage) 1931 x, y color coordinates which have been found to be optimal for the selection of such high fresh meats. Since light is irradiated in a specific color gamut defined by the lighting system, a transparent display booth or a transparent viewing booth of a meat store, a lighting of a selection table of a store or a kitchen, or a desktop cabinet for color evaluation ( It is applied to lamps for color assessment desktop cabinets or portable lamps for freshness evaluation of meats. By showing that the state of the can enhance consumer gumaeyok of course, it can not effectively be used in operations such as for evaluating the freshness of meat, and the specific category the appointed level or usage accordingly.

Meat, freshness, LED, lens cover, color conversion, film, sheet, lighting, phosphor, CIE color coordinate

Description

Meat freshness LED or LED assembly and LED lamp using it {LED OR LED ASSEMBLY FOR SHOWING FRESHNESS OF MEAT AND LED LAMP USING THE SAME}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to meat display LEDs or LED assemblies and LED lamps using the same, and more particularly, to transparent display booths or transparent viewing booths of meat stores. Color of meat displayed on display, for example, for lighting of a selection table in a store or kitchen, a lamp for a color assessment desktop cabinet, or a portable lamp for meat evaluation. Meat LED display LEDs and LED assemblies and LED lamps that can be effectively used for tasks such as showing fresh optimal conditions or evaluating specific meat lines and classifying and classifying them accordingly. .

In general, the superiority or freshness evaluation of a food material is a first of all, because each food material itself has its own color, a visual evaluation of the vividness, naturalness, or discoloration of the color is made first. An olfactory evaluation of and a taste evaluation of taste will follow.

In addition, cooked foods and favorite foods have been scientifically established that the taste or evaluation of taste by taste prior to taste and smell is the first and most important function, which means that 'Dahongchima' or 'Good rice cake is good to eat'. Is an empirical fact as confirmed by the didactic proverb.

Therefore, in the food industry, it is said that customers feel more than 85% taste before they taste the tongue, and 'impressive visual taste' for customers has become an important issue.

As described above, the color or color of food ingredients and cooked foods is one of the main factors indicating the freshness and quality, and also causing the increase or loss of appetite.

On the other hand, color is closely related to lighting, and artificial lighting, in particular, greatly changes the color atmosphere of food ingredients or cooked foods due to complementary or similar color harmony due to interaction with food colors, causing appetite enhancement or decline. do.

In addition, since the color developed from food ingredients or cooked food by artificial lighting is recognized as a direct relationship with the freshness or taste of the food, the consumer who purchases the product is one of the important judgment factors that determine the purchase or not. do.

In particular, the color of meat is assessed seriously and rigorously by consumers in terms of freshness, and is an important criterion for the choice or rejection of meat products. As it is perceived as a leading indicator of taste in cooking, the fresh intrinsic color of meat is one of the important quality features that make consumers decide to buy in the store.

The inherent red color of meat is due to pigment molecules called myoglobin and hemoglobin called hemoglobin, but most hemoglobin is released during blood loss by slaughter, so that most of the meat pigments are used in meat. Occupied.

When light is irradiated to meat myoglobin molecules, electrons shift (shifting), and the myoglobin molecules absorb light of the turquoise wavelength, so that the reddish pink color in complementary relationship with the meat is expressed in the color of meat. Color is mainly determined by the concentration of myoglobin and heme pigments.

Also, in meat, especially beef, marbling, which is a pattern of intramuscular fat spread throughout the muscles and skeletal muscles, determines the taste and moisture of the beef, so its shape, distribution, and uniformity. Sex is the most important element in the classification of beef quality grades. Beef with dense, even, and white distribution of marbling is classified as superlative meat.

Therefore, in meat, especially beef, the color contrast of the inherent red portion and the white marbling portion distributed in between is also an important factor, so the inherent characteristic of lean meat is used in meat display cases where the red system is illuminated. The contrast of pink marbling with one red color and some white tint is also an important consideration in purchasing.

However, the appearance color of the meat expressed by the daylight fluorescent lamp coated on the surface of the conventional red paint which is installed in the display booth or the viewing booth of the meat shop of the butcher or mart shows the excessive redness of the high saturation, Marbling's hue also shows excessive red color, which makes it difficult for consumers to blur the judgment on the freshness or quality of meat, and to induce purchase intention to lead to product purchase. .

Therefore, in order to solve the conventional problems as described above, the applicant has been exposed to the highest freshness due to the inherent color of meat and the contrast with marbling through the patent application No. 2009-101110 (filed on Oct. 23, 2009). The Commission Internationale d'Eclairage (CIE) 1931 x, y color coordinates, which are optimal for the selection of such high-fresh meats, are specified as 0.310 ≤ x ≤ 0.340 and 0.300 ≤ y ≤ 0.320 or 0.370 ≤ y ≤ 0.400 Although it is the first to show a meat freshness or inspection lighting lamp using RGB LED and phosphor coated LED which irradiate light of color gamut, phosphor coated LED or its cover or color diffusing film or sheet for color conversion No specific reference is made to this document, but only a specific color gamut in the CIE 1931 x, y color coordinates examined by him. Only.

On the other hand, when the LED is briefly mentioned, LED is a kind of semiconductor device that converts electrical energy into light energy, and because the light conversion efficiency is high, power consumption is very low, and the light source is small, so it is suitable for miniaturization, thinning, and light weight. Infinitely expandable installation, semi-permanently long life, no thermal or discharge light emission, no preheating required, very fast response speed, very simple lighting circuit, no discharge gas and filament It has the advantages of large impact, safety, low environmental pollution, high repetitive pulse operation, less optic nerve fatigue, and full color, which enables mobile phones, camcorders, digital cameras and personal portable devices. Light source for back light of liquid crystal display (LCD) such as information terminal (PDA), traffic light, sign board, vehicle front For display lamps for lighting and tail lamps, display parts of various electronic devices, office equipment, fax equipment, night light of remote control or surveillance camera, infrared communication, information display of outdoor billboards using various combinations of red and green pixels. It is widely used for high-precision LED display and high-end indoor / outdoor lighting. In particular, the high-brightness LED which improves the low-brightness problem, which is a general problem of the conventional LED, is commercially available, and its use and use are rapidly expanding.

However, as far as the applicant and inventor are aware, 0.310 ≤ x ≤ 0.340 and 0.300 ≤ y ≤ 0.320 or 0.370 ≤ on CIE 1931 x, y color coordinates as defined in patent application No. 2009-101110 by the applicant as described above. The development of phosphor-coated LEDs or their lens covers or light diffusing films or sheets for color conversion, which is effective for use in meat freshness by emitting light in a color gamut specified by y ≦ 0.400, has never been attempted at this time. Nothing is known about it.

Therefore, the first object of the present invention is to display the unique red-based color of the meat, as well as the contrast between the unique color and marbling to show the highest freshness, or to optimize the selection of the meat having such high freshness. The present invention provides a phosphor surface-coated LED capable of effectively irradiating color gamut light defined as 0.310 ≦ x ≦ 0.340 and 0.300 ≦ y ≦ 0.320 or 0.370 ≦ y ≦ 0.400 on a CIE 1931 x, y color coordinate.

The second object of the present invention is CIE 1931 which is optimal for the selection of meats having the highest freshness, as well as the inherent red-based color of meat, as well as the contrast between these unique colors and marbling. A lens cover or color conversion light diffusing film or sheet, or a lens cover capable of effectively irradiating color gamut light defined by 0.310 ≦ x ≦ 0.340 and 0.300 ≦ y ≦ 0.320 or 0.370 ≦ y ≦ 0.400 on an x, y color coordinate To provide an LED assembly comprising a UV coating layer.

A third object of the present invention is to provide an LED lamp using the LED or LED assembly according to the first and second objects described above.

According to a preferred aspect of the present invention for smoothly achieving the first object of the present invention described above, i) color 0.335 ≤ x ≤ 0.355 and 0.590 ≤ y ≤ 0.610 on the surface of a blue LED chip on i) CIE 1931 x, y color coordinates. A phosphor mixture having a weight ratio of 1: 1 to 2.4 of a yellow green phosphor representing a region and a red phosphor representing a color region of 0.445 ≦ x ≦ 0.465 and 0.500 ≦ y ≦ 0.520; Or ii) a yellow green phosphor having a color gamut of 0.335 ≦ x ≦ 0.355 and 0.590 ≦ y ≦ 0.610 and a yellow phosphor having a color gamut of 0.422 ≦ x ≦ 0.450 and 0.538 ≦ y ≦ 0.558; mixture; Or iii) a phosphor having a weight ratio of 1: 1 to 2.4 of a yellow green phosphor having a color gamut of 0.335 ≦ x ≦ 0.355 and 0.590 ≦ y ≦ 0.610 and a yellow phosphor having a color gamut of 0.452 ≦ x ≦ 0.472 and 0.518 ≦ y ≦ 0.535 The meat diagram is doped with a thickness of 500 nm to 2000 nm to irradiate color gamut light defined by 0.310 ≦ x ≦ 0.340 and 0.300 ≦ y ≦ 0.320 or 0.370 ≦ y ≦ 0.400 on CIE 1931 x, y color coordinates. Display LEDs are provided.

According to a preferred embodiment of the present invention for smoothly achieving the second object of the present invention, a silicone resin, polymethyl pentene resin, polyether sulfon resin, polyether imide 65-96.9 weight% of 1 type of heat resistant transparent resins chosen from the group which consists of a polyether imide resin, a polyarylate resin, and a polymethyl methacylate resin, Preferably it is 88-92 weight %Wow; 3 to 15% by weight, preferably 6 to 12% by weight, of the above-described phosphor mixture for illumination color conversion; 0.01 to 20% by weight, preferably 0.1 to 0.3% by weight of a light diffusing beads mixture having an average particle diameter of 1 to 4 μm: 5 to 10 μm: 11 to 30 μm in a weight ratio of 1: 0.4 to 0.8: 0.1 to 0.3 Meat diagram display LEDs molded into% composition to convert the emitted color of a blue LED into color gamut light defined as 0.310 ≦ x ≦ 0.340 and 0.300 ≦ y ≦ 0.320 or 0.370 ≦ y ≦ 0.400 on CIE 1931 x, y color coordinates It can be achieved smoothly by the lens cover or the light diffusion film or sheet for color conversion.

According to another preferred aspect of the present invention for smoothly achieving the second object of the present invention, a silicone resin, a polymethyl pentene resin, a polyether sulfon resin, a polyether already Of a lens cover or film or sheet for LEDs formed of one heat-resistant transparent resin selected from the group consisting of polyether imide resins, polyarylate resins, and polymethyl methacrylate resins. One type of UV curable resin selected from the group consisting of urethane acrylate, epoxy acrylate, polyester acrylate and acrylic acrylate resin on the outer surface 83 to 96.99% by weight, preferably 88 to 92% by weight; 3 to 12% by weight, preferably 5 to 9% by weight of the above-described phosphor mixture for illumination color conversion; 0.01 to 5.0% by weight, preferably 0.01 to 0.3% by weight of a light diffusing beads mixture having an average particle diameter of 1 to 4 μm: 5 to 10 μm: 11 to 30 μm with a weight ratio of 1: 0.4 to 0.8: 0.1 to 0.3 A color conversion light diffusion UV coating layer having a thickness of 1 to 250 μm was formed, and the emission color of the blue LED was determined by 0.310 ≦ x ≦ 0.340 and 0.300 ≦ y ≦ 0.320 or 0.370 ≦ y ≦ 0.400 on CIE 1931 x, y color coordinates. It can be smoothly achieved by a lens cover for LED display for light or color conversion light diffusion film or sheet for converting into color gamut light.

According to a preferred aspect of the present invention for smoothly achieving the third object of the present invention described above, the LED according to the above-described aspect, or the blue LED and the lens cover or color conversion film or sheet for color conversion according to the above-mentioned aspect, Or there is provided a meat freshness LED lamp consisting of a lens cover or film or sheet having a color diffusion light diffusion UV coating layer according to the above-described aspect, and a power supply for the one LED.

As described above, an LED or a blue LED emitting a specific color gamut according to the present invention and a lens cover or color conversion film or sheet for converting LED into a specific color gamut according to the present invention, and an LED lamp using the same The unique red color of the meat, as well as the contrast between this unique color and the marbling, is well represented and manifested at the highest freshness, or 0.310 ≤ x in the CIE 1931 x, y color coordinates, which is optimal for the selection of meat with such high freshness. Color gamut light, which is defined as ≤ 0.340 and 0.300 ≤ y ≤ 0.320 or 0.370 ≤ y ≤ 0.400, can be effectively irradiated, so that a transparent display booth lighting in a meat store or a selection table in a store or kitchen is selected. lamps for table lighting or color assessment desktop cabinets or meat assessment Applied to portable portable lamps, the color of the meat displayed on the display is displayed in the fresh and optimal state, so it can be effectively used for increasing purchasing power or evaluating the freshness of a specific meat and classifying the grade or use accordingly. .

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

As originally identified in the above-described patent application No. 2009-101110 (hereinafter, abbreviated as 'Previous Application Invention') by the applicant and inventor, the unique red-based color of meat, as well as such unique color and Contrast with marbling is well highlighted and manifested at the highest freshness, or the optimal light for the selection of meat with such high freshness is defined by 0.310 ≤ x ≤ 0.340 and 0.370 ≤ y ≤ 0.400 on CIE 1931 x, y color coordinates. Light in the color gamut, but in the range of more than 2000 lux, ranges of 0.310 ≦ x ≦ 0.340 and 0.300 ≦ y ≦ 0.320 may also be desirable.

However, the use of a combination of three types of red, green and blue LEDs (RGB LED assembly) in order to effectively emit light in the above-mentioned color gamut is relatively expensive to manufacture and the size of the product is large due to the complicated driving circuit. Since the temperature characteristics of the three types of LEDs are different from each other, precise control is not easy, and therefore, the optical characteristics and reliability are not so preferable.

Accordingly, the present invention uses a blue LED having a wavelength range of 420 to 470 nm, particularly 455 to 460 nm, to which meat of a specific phosphor mixture is doped so as to emit light of a specific color region on the CIE 1931 x, y color coordinate. It is directly related to the leading display LEDs, or assemblies thereof, and LED lamps comprising them.

As shown in the above-mentioned prior invention, an example of an image pair of a pair comparison experiment for selecting a grade for a photographed image is illustrated in FIG. 1 in which four of the sample images are arranged on one screen. Figures 2a to 2c show images of the freshest meat color using the Ordinal scale, which is shown as a photographic figure and scored from 1st to 4th by subject's subjective choice. Each is represented.

The picture shows the KS 5G 5/8 paper on dry ice to maintain freshness and placed the beef as meat on it without wrapping it, and then the camera (Canon / EOS40D) at an angle of 45 degrees from the meat. The picture was taken with the.

In addition, the memory color of the meat identified by the subjects as freshest is in the range of hue 7.5R, value 4-5 and chroma 14-16 in the KS color system, which is the KS color system and brightness of FIG. 3. The chromaticity coordinates test shows the fresh color that is remembered by a group of 10 adult women over 30 years of age who passed the color blindness test from the Korean Standard Color Book. This is done by selecting.

The present invention provides a color gamut defined by 0.310 ≦ x ≦ 0.340 and 0.300 ≦ y ≦ 0.320 or 0.370 ≦ y ≦ 0.400 on CIE 1931 x, y color coordinates capable of expressing fresh meat images as shown in FIGS. 2a to 2c. In order to obtain an illumination light of (approximately coincided with the KS color system and brightness-saturation coordinates shown in FIG. 3), the color gamut described by the combination of blue light and light excited from the phosphor mixture by coating the surface of the blue LED with a specific phosphor mixture. Lens covers for LEDs, or light diffusing films or sheets for color conversion, or color conversion light, designed to produce illumination light of the above-mentioned color gamut independently, without touching a single LED designed to produce illumination light of Using a lens cover for the LED to which the diffusion UV coating layer is applied, or an LED assembly using a film or sheet, using the LED assembly In this case, the illumination light of the above-mentioned color gamut can be easily obtained by simply and easily replacing only the lens cover or the light conversion film or sheet for color conversion without shortening the lifespan due to deterioration of the existing long-life blue LED. .

The phosphor mixture-doped blue LED according to the present invention is a meat freshness LED which is doped with a phosphor mixture of any one of the following three on the surface of a blue LED chip with a thickness of 500 nm to 2000 nm.

First, a yellowish green phosphor representing a color gamut of 0.335 ≦ x ≦ 0.355 and 0.590 ≦ y ≦ 0.610 on a CIE 1931 x, y color coordinate and a red phosphor representing a color gamut of 0.445 ≦ x ≦ 0.465 and 0.500 ≦ y ≦ 0.520 Phosphor mixed powder mixed in 1: 1 to 2.4.

Second, a yellowish green phosphor representing a color gamut of 0.335 ≦ x ≦ 0.355 and 0.590 ≦ y ≦ 0.610 on a CIE 1931 x, y color coordinate, and a yellow phosphor representing a color gamut of 0.422 ≦ x ≦ 0.450 and 0.538 ≦ y ≦ 0.558 A phosphor mixed powder mixed at 1: 4 to 100.

Third, a yellow green phosphor representing a color gamut of 0.335 ≦ x ≦ 0.355 and 0.590 ≦ y ≦ 0.610 on a CIE 1931 x, y color coordinate, and a yellow phosphor representing a color gamut of 0.452 ≦ x ≦ 0.472 and 0.518 ≦ y ≦ 0.535. Phosphor mixture powder mixed 1: 1 to 2.4.

The blue LED used in the present invention is not preferred a blue LED exhibiting the highest efficiency for an excitation light source of about 405 nm because the yellow YAG phosphor is generally excited at blue light of 450 to 460 nm and thus has low luminance. This is because the color rendering is only about 60-75.

Thus, the blue LEDs that can be preferably used in the present invention may be, but not limited to, InGaN-based blue LED having a wavelength of about 450 ~ 460nm.

In addition, the yellow phosphors usable in the present invention are various phosphors known in the art that can be excited at 450-460 nm (typically yttrium-aluminum-garnet: (YGd) ₃ Al ₅ O ₁₂ : Ce; YAG System compound or equivalent phosphors such as Sr ₂ Ga ₂ S ₅ : Eu ²⁺ and the like, and satisfying the above-mentioned color gamut value on the CIE 1931 x, y color coordinate is sufficient.

The red phosphors usable in the present invention can also be excited in various art known red phosphors (eg, Y ₂ O ₂ S: Eu, Gd, Li ₂ TiO ₃ : Mn, LiAlO ₂₎ that can be excited in the wavelength region of 430 nm-480 nm. : Mn, 6MgO As ₂ O ₅ : Mn ⁴⁺ , or 3.5MgO 0.5MgF ₂ GeO ₂ : Mn ⁴⁺ ), it is sufficient to satisfy the above-mentioned color gamut value on CIE 1931 x, y color coordinates.

Various green phosphors known in the art that can be excited in the wavelength range of 450 nm to 520 nm can also be used for the yellow green phosphors used in the present invention, and various known green phosphors in the art (eg, ZnS: Cu, Al, Ca _2). MgSi ₂ O ₇ : Cl, Y ₃ (GaxAl _1-x ) ₅ O ₁₂ : Ce (0 <x <1), La ₂ O _{3 11} Al ₂ O ₃ : Mn, Ca ₈ Mg (SiO ₄ ) ₄ Cl ₂ Mixed phosphors of: Eu, Mn) and the above-mentioned yellow phosphors, and various ones which satisfy the above-mentioned color gamut values on CIE 1931 x, y color coordinates are commercially available.

As the type of the yellow green phosphor, the red phosphor, and the yellow phosphor, a wide variety of those known in the art manufactured by various companies can be purchased commercially, and the color gamut specified by the CIE 1931 x, y color coordinate as described above. If it has a type, the manufacturer, there is no particular limitation on the kind of the compound, so further description thereof will be omitted.

In addition, the doping of the above-mentioned phosphor mixture for the blue LED is preferable because nano doping uniformly on the LED chip can minimize the loss of light efficiency, but the present invention is not limited thereto. Coating methods such as a slurry method, settling method, electrophoretic deposition (EPD) and the like may also be applied.

On the other hand, the lens cover for LED or the light diffusion film or cover for color conversion according to the present invention will be described.

As the lens cover for LED or the matrix resin for color converting light diffusing film or sheet applicable in the present invention, 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. Heat resistant transparent matrix resins include silicone resins, polymethyl pentene resins, polyether sulfon resins, polyether imide resins, polyarylate resins, or poly The methyl methacrylate (polymethyl methacylate) resin is mentioned, The addition amount of these matrix resins is 65-96.9 weight%, Preferably it is 88-92 weight% based on the total weight of the composition for shaping | molding.

When the content of the heat-resistant transparent matrix resin is less than 65% 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. In this case, the degree of alleviation of the glare due to the high brightness may not be sufficient, so it is not preferable. Since all of the above resins are known as heat-resistant transparent resins in the art, the description thereof will be omitted.

On the other hand, since the type and the mixing ratio of the phosphor for the illumination color conversion to the meat freshness illumination light in the present invention is essentially the same as described above, the description thereof will be omitted, 3 to 15 weight based on the total composition weight %, Preferably 6 to 12% by weight, and when the content of the above-mentioned phosphor is less than 3% by weight based on the total weight of the composition, satisfactory meat freshness illumination light may not be obtained and conversely exceeds 15% by weight. This is not preferable because the luminance may be excessively lowered.

The lens cover or color conversion light diffusion film or sheet for LED according to the present invention is to be mounted to the blue LED as a separate member to obtain the illumination light for meat freshness.

Subsequently, the light diffusing beads mixture in the lens cover for LED or the light diffusing film or sheet composition for color conversion according to the present invention has an average particle diameter of 1 to 4 µm, 5 to 10 µm, and 11 to 30 µm of light. The diffuser is a mixture in a weight ratio of 1: 0.4 to 0.8: 0.1 to 0.3, and is 0.01 to 20% by weight, preferably 0.1 to 0.3% by weight, based on the total weight of the molding composition.

Examples of the light diffuser described above include silicone resin (refractive index 1.43), polyacrylate (refractive index 1.49), polyurethane (refractive index 1.51), polyethylene (refractive index 1.54), polypropylene (refractive index 1.46), nylon (refractive index 1.54), Organic light diffusing agents such as homopolymers such as polystyrene (refractive index 1.59), polymethyl methacrylate (PMMA: refractive index 1.49), polycarbonate (refractive index 1.59) and copolymers of monomers thereof; Silica (refractive index 1.47), alumina (refractive index 1.50 to 1.56), glass (refractive index 1.51), calcium carbonate (refractive index 1.51), talc (refractive index 1.56), mica (refractive index 1.56), barium sulfate (refractive index 1.63), zinc oxide (refractive index) 2.03), inorganic light diffusing agents such as cesium oxide (refractive index 2.15), titanium dioxide (refractive index 2.50∼2.71), iron oxide (2.90), or any mixture thereof, but organic light diffusing agents are preferred. Preferred is polymethylmethacrylate in terms of high transparency.

As the light diffuser, a mixture having an average particle diameter of 1 to 4 μm, 5 to 10 μm, and an 11 to 30 μm light diffuser having a weight ratio of 1: 0.4 to 0.8: 0.1 to 0.3 is used. If it exceeds or falls below, it is not preferable because it may impair transparency or translucency, partially inhibit excitation of the phosphor, or conversely, it may be impossible to obtain uniform diffused light.

The case of applying the color diffusion light-diffusion UV coating layer to the outer surface of the lens cover or film or sheet for LED according to the present invention will be described.

The lens cover or film or sheet for the LED is not particularly limited in the present invention as long as the transparency and the heat resistance is good, the preferred example is the same as described above, so the description thereof will be omitted.

As a UV curable resin which comprises the UV coating layer applied to the said lens cover for LEDs, or the outer surface of a film or a sheet, urethane acrylate, an epoxy acrylate, polyester acrylate, an acrylic acrylate resin, or arbitrary mixed resins thereof The amount of the addition may be 83 to 96.99% by weight, preferably 88 to 92% by weight based on the total weight of the UV coating layer.

On the other hand, the amount of the above-mentioned phosphor mixture for the illumination color conversion is 3 to 12% by weight, preferably 5 to 9% by weight, based on the total weight of the UV coating layer on the premise that the UV coating layer is a thin film, the above-mentioned light diffuser mixture is weight ratio The mixture 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 is 0.01 to 5.0% by weight, preferably 0.01 to 0.3% by weight, based on the total weight of the UV coating layer. .

The coating thickness of said UV coating layer is 1-250 micrometers, Preferably it is 3-100 micrometers.

The light diffusing UV coating layer for color conversion is coated on the outer surface of the lens cover or film or sheet for the LED to convert the emission color of the blue LED into 0.310 ≤ x ≤ 0.340 and 0.300 ≤ y ≤ 0.320 or 0.370 ≤ on CIE 1931 x, y color coordinates. conversion to color gamut light defined by y?

When the light diffusion UV coating layer for color conversion is applied, it is not only economical by reducing the use of expensive phosphors, but is also environmentally friendly due to almost no volatile organic volatiles, and significantly higher productivity than thermosetting, and the formed coating film has high scratch resistance (anti- It has a scratch property, and if necessary, antistatic agent or stain resistance may be imparted by adding an antistatic agent or antifouling agent known in the art.

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

Example 1:

On the surface of the blue LED (IV: 24mW; WD 455 ~ 460nm), the yellow green phosphor of Cx: 0.345, Cy: 0.597 and the red phosphor of Cx: 0.456, Cy: 0.507 in CIE 1931 x, y color coordinates are 1: 1.2. Phosphor mixtures were then doped to a thickness of 750 nm by electrophoretic deposition.

As a result of measuring the area on the CIE 1931 x, y color coordinates for the illumination light of the manufactured LED, C10: 0.331, Cy: 0.380, 0.310 ≤ x ≤ 0.340 and 0.300 ≤ on CIE 1931 x, y color coordinates, which is optimal for meat diagram display. It was found to be within the central white region range in the accompanying FIG. 4, with y ≦ 0.320 or 0.370 ≦ y ≦ 0.400.

Example 2:

A yellow green phosphor of Cx: 0.345, Cy: 0.597 and yellow phosphors of Cx: 0.432 and Cy: 0.548 in CIE 1931 x, y color coordinates on the surface of a blue LED (IV: 24 mW; WD 455-460 nm). To prepare a LED doped with a mixture of phosphors to a thickness of 750nm by electrophoretic deposition.

As a result of measuring the area on the CIE 1931 x, y color coordinates for the illumination light of the manufactured LED, C10: 0.329, Cy: 0.397, 0.310 ≤ x ≤ 0.340 and 0.300 ≤ on CIE 1931 x, y color coordinates, which is optimal for meat diagram display. It was found to be within the central white region range in the accompanying FIG. 4, with y ≦ 0.320 or 0.370 ≦ y ≦ 0.400.

Example 3:

On the surface of the blue LED (IV: 24mW; WD 455∼460nm), the yellow phosphor of Cx: 0.345, Cy: 0.597, and the yellow phosphor of Cx: 0.438, Cy: 0.544 are represented by CIE 1931 x, y color coordinates. To prepare a LED doped with a phosphor mixture of 750nm thickness by the electrophoretic deposition method.

As a result of measuring the area on the CIE 1931 x, y color coordinates for the illumination light of the manufactured LED, 0.310 ≦ x ≦ 0.340 and 0.300 ≦ on the CIE 1931 x, y color coordinates as Cx: 0.335, Cy: 0.392 It was found to be within the central white region range in the accompanying FIG. 4, with y ≦ 0.320 or 0.370 ≦ y ≦ 0.400.

Example 4:

On the surface of the blue LED (IV: 24mW; WD 455 ~ 460nm), yellow phosphors of Cx: 0.345, Cy: 0.597 and yellow phosphors of Cx: 0.462, Cy: 0.527 in CIE 1931 x, y color coordinates are 1: 1. To prepare a LED doped with a phosphor mixture of 510nm thickness by the electrophoretic deposition method.

As a result of measuring the area on the CIE 1931 x, y color coordinates for the illumination light of the manufactured LED, C10: 0.316, Cy: 0.372, 0.310 ≤ x ≤ 0.340 and 0.300 ≤ on CIE 1931 x, y color coordinates, which is optimal for meat diagram display. It was found to be within the central white region range in the accompanying FIG. 4, with y ≦ 0.320 or 0.370 ≦ y ≦ 0.400.

Example 5:

On the surface of the blue LED (IV: 24mW; WD 455 ~ 460nm), the yellow phosphor of Cx: 0.345, Cy: 0.597 and yellow phosphor of Cx: 0.462, Cy: 0.528 in CIE 1931 x, y color coordinates are 1: 2 weight ratio. To prepare a LED doped with a mixture of phosphors to a thickness of 860nm by electrophoretic deposition.

As a result of measuring the area on the CIE 1931 x, y color coordinates for the illumination light of the manufactured LED, C10: 0.325, Cy: 0.379, 0.310 ≤ x ≤ 0.340 and 0.300 ≤ on CIE 1931 x, y color coordinates, which is optimal for meat diagram display. It was found to be within the central white region range in the accompanying FIG. 4, with y ≦ 0.320 or 0.370 ≦ y ≦ 0.400.

Example 6:

The injection molding of the transparent lens for LED made of epoxy resin was carried out, followed by 88% by weight of a silicone resin (Dow Corning, 409 HS), 8% by weight of the phosphor mixture in Example 1, and an average particle diameter of 2.0, The resin composition for LED lenses for light emission color conversion using polymethyl methacrylate (refractive index 1.50, light transmittance 91%) of 8.0 and 15.0 micrometers consisting of 0.2 weight% of light-diffusion bodies of the ratio of 1: 0.5: 0.2 by weight ratio is used. The lens for LED was manufactured by double-injecting a lens cover with a thickness of 2 mm on the molded LED transparent lens.

The prepared LED lens was mounted on the surface of a blue LED (IV: 24 mW; WD 455 to 460 nm), and the area on the CIE 1931 x, y color coordinate for the illumination light was measured. As a result, Cx: 0.331 and Cy: 0.381 were measured. It has been found to be within the central white region range in FIG. 4 attached to within the ranges of 0.310 ≦ x ≦ 0.340 and 0.300 ≦ y ≦ 0.320 or 0.370 ≦ y ≦ 0.400 on CIE 1931 x, y color coordinates that are optimal for display purposes.

Example 7:

The injection molding of the transparent lens for LED made of epoxy resin was carried out, followed by 88% by weight of a silicone resin (Dow Corning, 409 HS), 10% by weight of the phosphor mixture in Example 3, and an average particle diameter of 2.0 and 8.0, respectively. By using a resin composition for LED lenses for light emission color conversion, polymethyl methacrylate (refractive index of 1.50, light transmittance of 91%) of 15.0 μm is composed of 0.3 wt% of a light diffuser having a ratio of 1: 0.6: 0.2 by weight. The lens for LED was manufactured by double-injecting a lens cover to a molded LED transparent lens at a thickness of 2 mm.

The prepared LED lens was mounted on the surface of a blue LED (IV: 24 mW; WD 455 to 460 nm) and the area on the CIE 1931 x, y color coordinate for the illumination light was measured. As a result, Cx: 0.317 and Cy: 0.393 were obtained. It has been found to be within the central white region range in FIG. 4 attached to within the ranges of 0.310 ≦ x ≦ 0.340 and 0.300 ≦ y ≦ 0.320 or 0.370 ≦ y ≦ 0.400 on CIE 1931 x, y color coordinates that are optimal for display purposes.

Example 8:

The injection molding of the transparent lens for LED made of epoxy resin was carried out, followed by 88% by weight of a silicone resin (Dow Corning, 409 HS), 11% by weight of the phosphor mixture in Example 5, and an average particle diameter of 2.0 and 8.0, respectively. By using a resin composition for LED lenses for light emission color conversion, 15.0 μm polymethyl methacrylate (refractive index 1.50, light transmittance 91%) is composed of 0.1 wt% of a light diffuser having a ratio of 1: 0.6: 0.15 by weight. The lens for LED was manufactured by double-injecting a lens cover to a molded LED transparent lens with a thickness of 3 mm.

The manufactured LED lens was mounted on the surface of a blue LED (IV: 24 mW; WD 455 to 460 nm), and the area on the CIE 1931 x, y color coordinate for the illumination light was measured. As a result, Cx: 0.326 and Cy: 0.375 were measured. It has been found to be within the central white region range in FIG. 4 attached to within the ranges of 0.310 ≦ x ≦ 0.340 and 0.300 ≦ y ≦ 0.320 or 0.370 ≦ y ≦ 0.400 on CIE 1931 x, y color coordinates that are optimal for display purposes.

Example 9:

An epoxy resin transparent sheet (thickness: 1.2 mm) was extruded, followed by 96.3% by weight of a urethane acrylate (Kolon Emulsifier), 3.5% by weight of the phosphor mixture in Example 1, and an average particle diameter of 2.0, The outer surface of the color-diffused UV-coating layer for color conversion, consisting of 0.2 wt% of a polymethyl methacrylate (refractive index of 1.50 and a light transmittance of 91%) having a ratio of 1: 0.6: 0.15 by weight ratio of 8.0 and 15.0 µm It was coated with a thickness of 80㎛ and UV cured to prepare a sheet having a light diffusion UV coating layer for color conversion.

The fabricated sheet was assembled to a distance of 1 mm from the outer surface of a 14-clustered lamp (2200 lux) of blue LEDs (IV: 24 mW; WD 455 to 460 nm), and the CIE 1931 x, y The measurement of the area revealed that Cx: 0.314 and Cy: 0.312 were in the ranges of 0.310 ≤ x ≤ 0.340 and 0.300 ≤ y ≤ 0.320 or 0.370 ≤ y ≤ 0.400 on CIE 1931 x, y color coordinates, which are optimal for meat diagram display. It became.

The present invention has been described in detail above, but is not intended to limit the present invention, but is intended to illustrate the present invention, and various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention. It should be noted that it is within the realm.

FIG. 1 is an exemplary photograph showing a state in which four images are arranged in one screen in a pair comparison experiment for selecting a rating for a photographed image.

2A to 2C are photographs of meat images corresponding to first to third positions showing freshest meat colors using an ordinal scale.

3 is a KS colorimetric and lightness-saturation coordinate diagram that a subject is remembered to represent the hue of fresh meat.

4 is a CIE color coordinate for an illumination light according to an embodiment of the LED and LED assembly according to the present invention which can effectively implement a meat freshness hue similar to FIGS. 2A-2C.

Claims (11)

On the surface of the blue LED chip i) Yellow Green phosphor exhibiting a color gamut of 0.335 ≤ x ≤ 0.355 and 0.590 ≤ y ≤ 0.610 on the Commission Internationale d'Eclairage (CIE) 1931 x, y color coordinates and capable of excitation in the wavelength region of 450 nm-520 nm And a phosphor mixture having a color ratio of 0.445 ≦ x ≦ 0.465 and 0.500 ≦ y ≦ 0.520 and having a weight ratio of 1: 1 to 2.4 of a red phosphor capable of excitation in a wavelength range of 430 nm to 480 nm; or ii) a color gamut of 0.335 ≤ x ≤ 0.355 and 0.590 ≤ y ≤ 0.610, and a yellowish green phosphor capable of excitation in the wavelength range of 450 nm-520 nm and a color gamut of 0.422 ≤ x ≤ 0.450 and 0.538 ≤ y ≤ 0.558 A phosphor mixture having a weight ratio of 1: 4 to 100 of a yellow phosphor capable of excitation at ˜460 nm; or iii) a color gamut of 0.335 ≦ x ≦ 0.355 and 0.590 ≦ y ≦ 0.610 and a yellowish green phosphor capable of excitation in the wavelength range of 450 nm-520 nm and a color gamut of 0.452 ≦ x ≦ 0.472 and 0.518 ≦ y ≦ 0.535 A phosphor mixture with a weight ratio of 1: 1 to 2.4 of yellow phosphors that can be excited at ˜460 nm Doped to a thickness of 500 nm to 2000 nm, Irradiating color gamut light defined by 0.310 ≦ x ≦ 0.340 and 0.370 ≦ y ≦ 0.400 on CIE 1931 x, y color coordinates, or 0.310 ≦ x ≦ 0.340 and 0 ≦ y ≦ 0.320 at least at 2000lux. Meat Light Emitting Diode (LED). delete delete delete The yellow phosphor of claim 1, wherein the yellow phosphor is a YAG compound of (YGd) ₃ Al ₅ O ₁₂ : Ce or an Sr ₂ Ga ₂ S ₅ : Eu ²⁺ phosphor, wherein the red phosphor is 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 ㅇ GeO ₂ : Mn ⁴⁺ , the yellow-green phosphor is green Phosphor ZnS: Cu, Al, Ca ₂ MgSi ₂ O ₇ : Cl, Y ₃ (GaxAl _1-x ) ₅ O ₁₂ : Ce (0 <x <1), La ₂ O _{3 11} Al ₂ O ₃ : Mn, or Ca ₈ Mg (SiO ₄ ) ₄ Cl ₂ : Eu, Mn with yellow phosphor (YGd) ₃ Al ₅ O ₁₂ : Ce or Sr ₂ Ga ₂ S ₅ : Euro ²⁺ A mixture of meat freshness LEDs. A blue LED; Silicone resins, polymethyl pentene resins, polyether sulfon resins, polyether imide resins, polyarylate resins, and polymethyl methacylate 65-96.9 weight% of 1 type heat-resistant transparent resin chosen from the group which consists of resin, 3-15 weight% of said fluorescent substance mixture for illumination color conversion, and the average particle diameter of 1: 0.4-0.8: 0.1-0.3 It consists of a lens cover or a light diffusing film or sheet for color conversion, which is molded from a composition of 0.01 to 20% by weight of a mixture of light diffusing beads of 5 to 10 µm to 11 to 30 µm. Converting the blue light of the blue LED to color gamut light of 0.310 ≦ x ≦ 0.340 and 0.300 ≦ y ≦ 0.320 or 0.370 ≦ y ≦ 0.400 on CIE 1931 x, y color coordinates Meat freshness LED assembly. A blue LED; Lens cover for LED molded from 1 type of heat resistant transparent resin selected from the group which consists of a silicone resin, polymethyl pentene resin, polyether sulfone resin, polyether imide resin, polyarylate resin, and polymethylmethacrylate resin Or a film or sheet; Urethane acrylate, epoxy acrylate, polyester acrylate, and acrylic acrylate coated on the outer surface of the lens cover or film or sheet for the LED 83-96.99 weight% of 1 type UV-curable resin chosen from the group which consists of resin, 3-12 weight% of the above-mentioned fluorescent substance mixture for light color conversion, and the average particle diameters 1-4 of 1: 0.4-0.8: 0.1-0.3 It consists of a color-converted light-diffusion UV coating layer having a thickness of 1-250 μm with a thickness of 0.01-5.0 wt% of a light diffusion mixture of 5-10 μm: 11-30 μm: The color conversion light diffusion UV coating layer converts the blue light of the blue LED into color gamut light of 0.310 ≦ x ≦ 0.340 and 0.300 ≦ y ≦ 0.320 or 0.370 ≦ y ≦ 0.400 on CIE 1931 x, y color coordinates. Meat freshness LED assembly. The meat diagram display according to claim 6 or 7, wherein the LEDs doped with the phosphor mixture phosphor mixture irradiate color gamut light of 0.310 ≦ x ≦ 0.340 and 0.370 ≦ y ≦ 0.400 on CIE 1931 x, y color coordinates. LED assembly. The meat according to claim 6 or 7, wherein the LED doped with the phosphor mixture phosphor mixture irradiates color gamut light of 0.310 ≦ x ≦ 0.340 and 0.300 ≦ y ≦ 0.320 on a CIE 1931 x, y color coordinate at at least 2000 lux. Leading display LED assembly. The yellow phosphor according to claim 6 or 7, wherein the yellow phosphor is capable of excitation at 450 to 460 nm, the red phosphor is capable of excitation at a wavelength region of 430 nm to 480 nm, and the yellow green phosphor. Is excited in the wavelength range of 450 nm to 520 nm, and the yellow phosphor is a YAG compound of (YGd) ₃ Al ₅ O ₁₂ : Ce or a Sr ₂ Ga ₂ S ₅ : Eu ²⁺ phosphor, The phosphor is 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 ㅇ GeO ₂ : Mn ⁴⁺ , The yellow green phosphor is a green phosphor ZnS: Cu, Al, Ca ₂ MgSi ₂ O ₇ : Cl, Y ₃ (GaxAl _1-x ) ₅ O ₁₂ : Ce (0 <x <1), La ₂ O ₃ ㅇ 11Al ₂ O ₃ : Mn, or Ca ₈ Mg (SiO ₄ ) ₄ Cl ₂ : Eu, Mn and yellow phosphor (YGd) ₃ Al ₅ O ₁₂ : Ce or Sr ₂ Ga ₂ S ₅ : Eu ²⁺ Leading display LED assembly. delete

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