KR101241232B1 - Led lamp having reflector - Google Patents

Led lamp having reflector Download PDF

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Publication number
KR101241232B1
KR101241232B1 KR1020100100809A KR20100100809A KR101241232B1 KR 101241232 B1 KR101241232 B1 KR 101241232B1 KR 1020100100809 A KR1020100100809 A KR 1020100100809A KR 20100100809 A KR20100100809 A KR 20100100809A KR 101241232 B1 KR101241232 B1 KR 101241232B1
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South Korea
Prior art keywords
led
white light
reflector
phosphor
white
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KR1020100100809A
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Korean (ko)
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KR20120039224A (en
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심현섭
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심현섭
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/40Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • F21S2/005Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction of modular construction
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00Illumination
    • Y10S362/80Light emitting diode

Abstract

The present invention relates to a light emitting diode (LED) lighting lamp, wherein the LED lighting lamp according to the present invention is a space on which a blue LED chip of a COB (Chip on Board) type on a heat-sink top surface and a blue LED chip are spaced. The light filter according to the present invention comprises a white light conversion phosphor filter positioned to be spaced apart from each other, and a reflector located at an upper periphery of the white light conversion phosphor filter. In addition to effectively eliminating the problem of shortening lifespan, it is possible to obtain lighting white light simply and inexpensively from a relatively long-life high-brightness blue LED, purple LED, or ultraviolet LED without the necessity of using a relatively short-lived and expensive high-brightness white LED. High, and the user or contractor needs to replace the entire lamp to replace the white light with the desired color temperature. It is possible to realize white light of the desired color temperature simply and easily, and it can show relatively high illumination and brightness by preventing the decrease of transmittance due to not using the lens selectively, and more effectively by effectively eliminating the glare phenomenon. The lighting of the atmosphere can be implemented.

Description

LED lighting lamp {LED LAMP HAVING REFLECTOR}

The present invention relates to an LED (Light Emitting Diode) light lamp, and more particularly, it is simple and easy for a user or a construction person, not a producer, to replace the lamp to replace with white light of a desired color temperature. By replacing only bays, various white lights having a desired color temperature can be realized, and in addition, in a chip on board type LED, deterioration of heat dissipation characteristics caused by directly coating or molding a white light conversion phosphor on a chip surface It shortens the LED lifespan problem and low brightness problem due to the decrease in transmittance due to lens use, and eliminates the need to use a relatively short and expensive high brightness white LED and is simple and inexpensive from the long life high brightness blue LED. Economical efficiency as white light for lighting or display can be obtained The present invention relates to an LED lighting lamp having a reflector capable of effectively realizing and at the same time, effectively alleviating glare caused by high-brightness LED lighting to obtain a more gentle and comfortable lighting.

LED is a device that forms a small number of carriers (electrons or holes) injected using a pn junction structure of a semiconductor, and emits light of a predetermined wavelength by recombination thereof, a red light emitting device using GaAsP, etc., a green using GaP, etc. Various kinds of light emitting devices, such as blue light emitting devices using InGaN / AlGaN double hetero structure, are known.

Since LEDs have high light conversion efficiency, power consumption is relatively low, and the light source is small, so it is suitable for miniaturization, thinness, and light weight, but it can be installed indefinitely, and until the brightness reaches about 80% of the initial stage The lifetime of abatement life is semi-permanently long (about 100,000 hours life for blue, purple, or ultraviolet LEDs and about 30,000 hours for white LEDs), and it is not thermal or discharge emitting, so preheating is unnecessary. Very fast speed, simple lighting circuit, no discharge gas and filament, high impact resistance, safe, low environmental pollution, high repetitive pulse operation, and less optic nerve fatigue In addition, it has the advantage of being able to implement full color, and is widely used for high-end indoor and outdoor lighting, and in particular, One problem was the low intensity improves the problem due to the high brightness LED doemeuro available on a commercial scale, and its use is use is rapidly expanding.

In particular, white LEDs are very useful for indoor and outdoor high-grade lighting, and their frequency of use is rapidly increasing. Like the expulsion of the incandescent lamp market by fluorescent lamps, it is expected to replace fluorescent lamps in the near future and occupy most of the lighting lamps. Is growing rapidly every year, and by 2012, the global market is expected to exceed $ 12 billion.

White can be largely divided into two types of LEDs.

First, as a classic method, three LEDs of red, green, and blue are adjacently combined, and the light emission of each device is mixed to realize white color. However, the three LED chips have different thermal, temporal, and color temperature characteristics. Therefore, there is a problem in that the optical characteristics and reliability of the product are inferior, such as a change in color tone and color unevenness, depending on the use environment, and a problem in that the size of the product increases due to a relatively high manufacturing cost and a complicated driving circuit. Due to the current situation is rarely used.

Therefore, in recent years, various phosphors are directly coated on a surface of a monochromatic LED chip other than white or homogeneously dispersed in a lens formed by directly molding a monochromatic LED chip, thereby converting wavelengths by a part of the primary emission by the monochromatic LED chip and the phosphor. The method of realizing white color by the mixed color of secondary light emission is mainly used.

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 most typical type of white LED widely used is an InGaN-based blue LED coated or molded with a yellow phosphor (typically yttrium-aluminum-garnet: Y 3 Al 5 O 12 : Ce, YAG-based compound) of the blue LED. Blue light excites the YAG yellow phosphor and complements the single wavelength region of the blue light having the narrow peak of the blue LED and the yellow light of the broad peak by the YAG-based yellow phosphor, thereby white light in the human eye. It was recognized as.

However, this white light is a mixture of two wavelengths of light that are not completely complementary and only holds a partial spectrum of visible light. Therefore, the color rendering property is about 60 to 75 and is not recognized as white light close to natural light. In general, 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 brightness, especially homogeneous for coating or molding YAG-based phosphors. In addition, since it is difficult to ensure a constant dispersibility, there is a problem that the uniformity and reproducibility of the product are low in the luminance and spectral distribution of the white light, and the LED life is also significantly shortened.

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. Although a method of realizing white light close to a natural color of three wavelengths having high color rendering properties has been proposed, the blue and green phosphors exhibit satisfactory luminous efficiency, but the luminous efficiency of red phosphors is poor. And it is not easy to precisely control the homogeneous distribution, and there is a problem of shortening the lifetime of the LED chip due to the deterioration of heat dissipation characteristics. Especially, the ultraviolet LED has not only degraded the organic resin but also shortened the LED lifetime. There is a problem.

Another type of white LED uses purple LEDs with wavelengths from 390 nm to 410 nm and combines red, blue, and green phosphors to produce white light. High brightness purple LEDs are commercially available from Cree Corporation of the United States. It is known to emit red, blue and green phosphors evenly by the violet light in the range of 390 ~ 410nm, and emit relatively natural 3 wavelengths of white light.However, the homogeneous mixing of each phosphor and its homogeneous distribution There is a problem in that it is not easy to control and shortening the life of the LED chip due to the deterioration of heat dissipation characteristics.

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 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 about 1.1 to 1.5 in the case of epoxy resin), so it is difficult to obtain white light having excellent optical properties, and to precisely control the degree of dispersion of the phosphor and two or more kinds of phosphors. In the mixed use, it is never easy to achieve a homogeneous mixing distribution as a whole, and thus there is a problem in that it is not easy to manufacture a high-quality white LED device and the manufacturing reproducibility is also poor.

On the other hand, the high power and high efficiency white LED lighting lamps have an inherent high heat generation property, resulting in deterioration of optical output characteristics and efficiency, shortening of lifespan, and deterioration of peripheral components or elements, so that a heat sink or heat spreader ( Sufficient heat dissipation by heat spreader has emerged as an important issue. Therefore, LED lighting lamps adopt a method of exposing heat sinks or heat spreaders to the outer surface of the body to increase heat dissipation while increasing their size or area. However, a conventional structure that realizes white light by directly applying a phosphor on the surface of a blue, purple, or ultraviolet LED or homogeneously incorporating it into a lens formed therein is a deterioration and lifetime of the LED chip due to deterioration of heat dissipation characteristics of the chip. Shortening has been recognized as inevitable.

On the premise of the above-described problems with the prior art, several LED lamps with conventional reflectors will be described.

FIG. 6 is a cross-sectional view showing a white LED 10 'in the form of a lamp using a conventional blue LED chip and a yellow light emitting phosphor, and the structure thereof is a mount lead having a reflector portion 13 on which the LED chip 14 is seated. And an inner lead 12 spaced apart from each other, wherein the n and p electrodes of the LED chip 14 are each connected by the conductive wire 15 to the mount lead 11 and the inner lead 12. The LED chip 14 is electrically connected to the above, and the LED chip 14 is molded with a heat-resistant transparent resin 16 in which phosphors are homogeneously mixed, and an encapsulated lens portion 17 is molded for improving the directivity of light emission as a whole.

FIG. 7 is a schematic cross-sectional view of a white LED lamp 10 ″ proposed in Korean Patent No. 0944008, which includes a monochromatic LED chip 14 mounted on a bottom surface of a reflector 13 via a package substrate (not shown). The transparent resin encapsulation portion 17 formed by molding the periphery of the monochromatic light LED chip 14 and the fluorescent layer 16 formed on the upper surface of the transparent resin encapsulation portion 17 and the light transmission formed on the upper surface thereof again. The fluorescent layer 16 is a layer in which the fluorescent material 16a is homogeneously distributed in a transparent resin (not shown), and the light transmitting layer 18 has a critical angle at which total reflection occurs. It is composed of spherical particles 18a that form a hemispherical embossing pattern on the surface to increase.

Fig. 8 is a cross-sectional view showing a white LED lamp ('″) in the form of a lens-free (lens- not used) proposed in Korean Utility Model Model No. 0422124, with a heat-conductive plastic case 19, an input side and PCB assembly 14b having output side electrodes 11 and 12, heat dissipating plate 14a made of thermally conductive plastic, phosphor coating LED 14, and reflector 13.

However, any of the conventional white LED lamps 10 ', 10 " and 10' " as described above are molded by phosphor mixed transparent resin around the monochromatic LED chip or by molding a phosphor layer on the upper surface after the transparent resin molding. As a formed form, shortening the lifespan due to deterioration of the heat dissipation characteristics of the LED chip is inevitable, and there is a problem in that the whole should be replaced when the user wants to replace the white light with the desired color temperature.

Therefore, there has been a need in the art for the development of a new type of white LED lighting lamp that overcomes the inherent problems of the prior art as described above.

Therefore, the first object of the present invention is to provide an LED lighting lamp that can be easily and easily implemented by the user or the builder the white light of the desired color temperature without the need of replacing the entire lamp when replacing the white light having the desired color temperature.

The second object of the present invention eliminates the necessity of using a relatively short-lived and expensive high-brightness white LED in addition to the first object described above, and can obtain a white light for illumination simply and inexpensively from a relatively long-life high-brightness blue LED. An object of the present invention is to provide an LED lighting lamp that can effectively implement economical efficiency.

The third object of the present invention is to provide an LED lighting lamp that effectively solves the problem of shortening the lifespan of the LED lamp due to the deterioration of the heat dissipation characteristics of the LED chip in addition to the above-mentioned various objects.

A fourth object of the present invention is to provide an LED lighting lamp which exhibits high illuminance and brightness in addition to the above-mentioned general objects.

The fifth object of the present invention is to provide an LED lighting lamp that can achieve a more gentle and comfortable illumination by effectively eliminating the glare phenomenon in addition to the above-mentioned object.

According to a preferred aspect of the present invention for smoothly achieving the object of the present invention, a reflector; A blue LED chip of a chip on board (COB) type formed on an upper surface of a heat-sink and having a circular protrusion; It has an upper and lower opening, an insertion groove in the center of the inner circumferential portion, a press-in groove or a step of the upper portion, and is attached to the COB by double-sided adhesive tape in a state where the lower inner circumferential portion is in close contact with the outer circumference of the circular protrusion. A detachable housing in which a lower end of the reflector is attached to one press-in groove or step; There is provided an LED lighting lamp that is fitted in the insertion groove of the housing and is composed of a phosphor filter for white light conversion spaced apart from the blue LED chip with a space therebetween.

According to another preferred aspect of the present invention for smoothly achieving the object of the present invention, the fixing portion is formed on the outer peripheral lower end of the reflector and the heat sink is formed with a fixing hole LED is coupled by mutual fixing means An illumination lamp is provided.

According to still another preferred aspect of the present invention for smoothly achieving the object of the present invention, an LED lighting lamp having a plurality of lateral radiating openings is provided below the side of the housing.

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LED lighting lamp according to the present invention can easily and easily implement the white light of the desired color temperature without the need of replacing the whole lamp when replacing the white light having the desired color temperature, in addition to the heat radiation characteristics of the LED chip In addition to effectively eliminating the problem of shortening the lifespan of LED lamps, it is possible to obtain white light for lighting from a relatively long-life high-brightness blue LED simply and inexpensively without the necessity of using a relatively short-lived and expensive high-brightness white LED. It is possible to implement a relatively high illuminance and brightness by preventing a decrease in transmittance due to the absence of a lens, and optionally to effectively remove the glare, it is possible to implement a more calm atmosphere lighting.

1 is a side cross-sectional view of an LED lighting lamp according to the present invention.
FIG. 2 is an exploded view illustrating the assembled state of FIG. 1. FIG.
3 is a plan view of a reflector applicable to the present invention.
4 is a plan view of a COB applicable to the present invention.
5A and 5B are exemplary cross-sectional views of filter housings applicable to the present invention, respectively.
6 is an exemplary structural cross-sectional view of a typical LED lamp of the related art.
7 is a structural cross-sectional view of a conventional reflector mounted LED lamp.
8 is a structural sectional view of a conventional lens-free type LED lamp.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

1 and 2 are side cross-sectional views and exploded assembly state explanatory diagrams of the LED lighting lamp 1 according to the present invention, respectively, for convenience.

The LED lighting lamp 1 according to the present invention comprises a COB (Chip on Board) 2 having a blue LED chip 2a mounted on a circuit board, a heat sink 3 at the bottom thereof, and the blue LED chip described above. It consists of the white light conversion fluorescent substance filter 5 which is spaced apart from (2a) with the space part 4 interposed, and the reflector 8 located in the upper periphery part of the above-mentioned white light conversion fluorescent substance filter 5. .

In the present invention, the above-described space is left without changing the blue LED chip 2a without molding the transparent resin directly on the blue LED chip 2a or applying the phosphor for white light conversion directly on the surface thereof. The arrangement in which the phosphor filter 5 for white light conversion is arranged along the portion 4 eliminates the inhibition of heat radiation from the surface of the blue LED chip 2a and at the same time provides smooth heat radiation through the space portion 4. In addition, since the angle of incidence of the back light scattered by the phosphor from the dense medium to the medium is oriented away from the normal, the damage of the LED element is reduced, thereby contributing to the stabilization of the light emitting module, and as a result, it is relatively expensive and singular. Using the low cost and long life blue LED chip (2a) without the need for bright white LEDs, it is easier to achieve white light with a desired color temperature. Thereby the number of hyeonhal.

The blue LED chip 2a described above is a plurality of blue LEDs, the number and arrangement of which are arbitrary in the present invention.

In addition, the heat sink 3 is formed of a metal material having good heat dissipation characteristics such as aluminum, and a bottom surface of a circuit board (not shown) having a plurality of conductive traces formed by a thermally conductive adhesive such as silver (Ag) filled epoxy or the like. Is attached to.

The heat sink 3 may be formed in a flat plate shape as shown, but if necessary, a plurality of heat sink fins may be formed below.

On the other hand, the white light conversion filter 5 is mounted in the ring-shaped housing 6.
In addition, it may be desirable to improve the heat dissipation characteristics by forming a plurality of lateral heat dissipation holes (refer to reference numeral 6d in FIGS. 5A and 5B described later) below the side of the housing 6.

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The housing 6 is formed in a detachable type which is attached to the lower end of the reflector 8 by screwing or forced press or double-sided adhesive tape.

In this way, the housing 6 on which the white light conversion filter 5 is mounted is manufactured in a separate type rather than in one piece, so that the user has a warm white (warm white) similar to a white light having a specific color temperature, for example, an incandescent lamp having a color temperature of about 3000 K, Alternatively, a white light conversion filter (white light having a color temperature of about 4000K, or a primary white color having a color temperature of about 5000K, or a daylight color having a color temperature of about 6700K is desired or desired to be replaced. It is possible to simply and easily implement the lighting having a specific color temperature to replace only the housing 6 on which 5) is mounted.

The phosphor filter 5 for converting white light is composed of a heat resistant transparent resin and a phosphor homogeneously dispersed and distributed therein, and may further include a light diffuser, which will be described later in detail. .

Also, if necessary, a dichroic filter having a refractive index of 1.4 to 1.6 that passes through a light having a wavelength of 500 nm or less and reflects light having a wavelength of 500 nm or less, for example, is provided at the bottom of the phosphor filter 5 for white light conversion. It can also be located. 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.

The LED lighting lamp 1 according to the invention is in principle a lens-free type as shown, but if desired a conventional lens (not shown) is mounted above the phosphor filter 5 for white light conversion. It is, of course, also possible, and this is also within the scope of the present invention.

Next, with reference to the plan view of the reflector 8 applicable to the present invention shown in FIG. 3, the reflector 8 in the illustrated example has two upper and lower circular stepped portions 8a, and the inner periphery has a longitudinal edge. Corrugation portion 8b is formed in the direction so that light reflection can be made homogeneously.

The reflector 8 has an upper opening 8d and a lower opening 8c, and a fixing part 8e for fixing to the heat sink 3 may be formed at the lower end of the outer circumference thereof.

Although the reflector 8 may be formed of a metal material, after molding from a resin material in terms of light weight and ease of molding, the inner circumferential surface (and the outer circumferential surface, if necessary) may be vacuumed with aluminum, silver, or chromium. It is reflecting-hardening by vapor deposition.

However, in the present invention, the shape, material, dimensions, and the like of the reflector 8 are optional.

Next, this will be described with reference to FIG. 4, which shows a plan view of the COB 2 applicable to the present invention. In the center of the COB 2 attached on the heat sink 3, a plurality of blue LED chips 2a are described. ) Is arranged in a predetermined shape and number, and is formed so as to be in close contact with the inner circumference of the bottom of the housing 6 described above by forming a circular protrusion 2e.

The surface of the PCB 2d, which is one component of the COB 2, is covered with an insulating coating film, and the + terminal portion 2b and-terminal portion 2c are exposed to the outside without insulation.

The example shown shows the case where the fixing hole 3a and the fixing groove 3b were formed in the heat sink 3, and this is similarly formed in the corresponding location of the COB 2 attached on the heat sink 3 as well.

1 and 2 again, the overall configuration will be described. A reflector 8 is positioned at an upper portion thereof, and a white light conversion filter 5 is mounted at an insertion groove 6a formed at an inner circumferential portion thereof. The ring-shaped housing 6 which is forcibly press-fitted with the lower end of the reflector 8 is arranged by the press-in groove 6b of the above, and further below the COB 2 with the heat sink 3 is provided, for example. Attached via a double-sided adhesive tape 7 having an opening in the center, and then the fixing means 9 is inserted through the fixing holes 3a formed in the heat sink 3, and the reflector 8 described above. ) Is firmly fixed to the fixing portion 8e.

Here, the outer periphery of the circular protrusion 2e formed in the COB 2 is in close contact with the lower inner periphery of the housing 6 (see 6e in FIGS. 5A and 5B), wherein the blue LED chip 2a By allowing the space portion 4 to be formed between the upper surface and the filter 5 for white light conversion, the blue LED chip 2a can be effectively prevented from being deteriorated by its own heat dissipation.

In contrast, with reference to FIGS. 5A and 5B, which are respective sectional views of the housing 6 applicable to the present invention, although not limited thereto, a ring-shaped housing having upper and lower openings (not shown) An insertion groove 6a for mounting the white light conversion filter 5 is formed at the center of the inner peripheral portion of 6), and a plurality of lateral radiating openings 6d are formed below the insertion groove 6a, thereby providing a blue LED chip ( It is preferable to induce smooth ring external discharge of heat dissipated from 2a).

On the other hand, the fastening of the housing 6 to the reflector 8 is screwed by the screw part 6c in the case of FIG. 5A (in this case, a screw part (not shown) is also formed on the outer peripheral edge of the reflector 8), In the case of Fig. 5B, the forced press-fitting structure by the step 6f is shown, respectively.

Next, the above-mentioned white light conversion filter 5 will be described in detail.

White light conversion filter 5 applied to the present invention is composed of a heat-resistant transparent resin 25 to 98% by weight, and phosphors 2 to 75% by weight, in the case of the blue LED chip, the phosphor is a yellow phosphor alone or yellow and Red mixed phosphors may be used, and the mixing ratio of the yellow and red mixed phosphors is not limited but is generally in the range of 1: 0.05 to 0.35 by weight.

If the total weight of the phosphor is less than 2% by weight based on the total weight of the composition, it is not preferable because the spectrum intensity is lowered and smooth whitening is difficult, which may impair the visibility of the illumination light. In addition, it is not preferable because it causes a problem in kneading and there is a possibility that the luminance is excessively lowered.

It may also optionally include a green phosphor to increase the color rendering.

The matrix resin used for the white light conversion filter 5 applied to the present invention is not particularly limited as long as it has good transparency and heat resistance, but preferred heat-resistant transparent resins include silicone resin and polymethyl pentene. any one of (polymethyl pentene) resin, polyether sulfon resin, polyether imide resin, polyarylate resin, and polymethyl methacylate resin, or Any one kind of UV curable resin such as urethane acrylate, epoxy acrylate, polyester acrylate, and acrylic acrylate can be used, and the amount of these matrix resins is 25 to 25 based on the total weight of the white light conversion filter (5). 98 weight%, Preferably it is the range of 30 to 90 weight%.

When the content of these heat-resistant transparent resins is less than 25% by weight, the transparency is inferior, it causes problems in kneading, and the brightness may be excessively lowered due to the halo effect caused by scattering. When it exceeds%, since there is a possibility that the white light conversion effect by a fluorescent substance may be inadequate, it is also unpreferable.

On the other hand, all of the above UV-curable resins are those commonly used as heat-resistant transparent resin in which polymerization is initiated by ultraviolet rays in the art, and other heat-resistant transparent resins are also known ones, so a detailed description thereof will be omitted.

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The yellow phosphor is not particularly limited as long as it is excited at 250 to 450 nm and emits a wavelength in the range of 545 to 580 nm. Examples of the yellow phosphor include (YGd) 3 Al 5 O 12 : Ce, (YGd) 3 (AlGa) 5 O 12: Ce, Sr 2 Ga 2 S 5: Eu 2 +, Sm 3 Al 5 O 12: Ce, Tb 3 Al 5 O 12: Ce, (Sr 1-xy Ba x Ca y) 2 SiO 4: Eu 2+ F (0≤x≤0.8, 0≤y≤0.8), (Y 1-r Smr, Gd 1-r Smr) 3 (Al 1-s Ga s ) 5 O 12 : Ce (0≤r <1, 0 ≤s≤1), (Y 1-xyz Ce x Tb y Gd z ) 3 Al 5 O 12 (0.008≤x≤0.05, 0.005≤y≤0.06, 0.01≤z≤0.06, x + y + z <0.21) , (Sr 1-xy (Mg, Ca, Ba) x ) 2 SiO 4 : Eu y , (Sr 1-xy (Mg, Ca, Ba, Ra) x ) 2 SiO 2 : Eu y (0≤x <1 , 0.001≤y≤0.3, Z is 1-5), Ca 0.75 Eu 0.25 Si 8.625 Al 3.375 O 1.125 N 14.87 , (Ca, Sr, Mg, Ln) SiAlN w-δ O δ : Ce 3+ (W = 3 , 0 ≦ δ <3) and (Mn, Ce, Eu, Gd, Tb, Yb, Lu) La 3 Si 8 N 11 O 4 .

On the other hand, in terms of high brightness, (YGd) 3 Al 5 O 12 : Ce, (YGd) 3 (AlGa) 5 O 12 : Ce, Sm 3 Al 5 O 12 : Ce, Tb 3 Al 5 O 12 : Ce, (Al 1 - s Ga s ) 5 O 12 : Ce (0≤r <1, 0≤s≤1 ), (Y 1 -xy- z Ce x Tb y Gd z ) 3 Al 5 O 12 It may also be desirable to use aluminate-based phosphors such as (0.008 ≦ x ≦ 0.05, 0.005 ≦ y ≦ 0.06, 0.01 ≦ z ≦ 0.06) in an assisted manner.

In addition, the red phosphor is not particularly limited as long as it is excited at 250 to 450 nm and emits a wavelength in the range of 630 to 700 nm. For example, Y 2 O 2 S: Eu, Gd, Li 2 TiO 3 : Mn, LiAlO 2 : Mn, 6MgO · As 2 O 5 : Mn 4+ , 3.5MgO.0.5MgF 2 ㆍ GeO 2 : Mn 4+ , Ba 1.746 Ca 2.134 Si 6 N 10.08 O 0.92 : Eu 0.04 , Ce 0.08 Sr 3 SiO 5 : Eu, CaS: Eu, Sr x Ba y Ca 1-xy AlSiN 3 : Eu (0 ≦ x + y ≦ 1, 0 ≦ x, y ≦ 1), Sr x Ba y Ca 2-xy S: Eu (0 ≦ x + y ≦ 2), Y (Ba, Sr, Ca) 1-x Eu xa Si b O c N d (0 <x <1, 1.8 <a <2.2, 4.5 <b <5.5, 0≤c <8, 0 <d ≤ 8 and 0 <c + d ≤ 8).

In addition, the above-mentioned green phosphor is not particularly limited as long as it is excited at 250-450 nm and emits a wavelength in the range of 500-540 nm. For example, 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 and 11Al 2 O 3: Mn, Ca 8 Mg (SiO 4) 4 C l2: Eu, Mn, Sr 2 SiO 4: Eu, Ba 2 SiO 4: Eu , Ca 2 SiO 4: Eu, SrGa 2 S 4: Eu, BaGa 2 S 4: Eu, CaGa 2 S 4: Eu, Sr 2 Ga 2 S 5: Eu, SrAl 2 S 4 : Eu, BaAl 2 S 4 : Eu, Sr 2 Al 2 S 5 : Eu, Ba 2 MgSi 2 O 7 : Eu, Ba 2 ZnSi 2 O 7 : Eu, BaAl 2 O 4 : Eu, SrAl 2 O 4 : Eu , BaMgAl 10 O 17: Eu, Mn 2+, and BaMg 2 Al 16 O 27: Eu , Mn 2+, (Ca, Sr, Mg, Ln) SiAlN 2 O: Ce 3+, Eu 0 .0029 Si 0. 40 427 may be mentioned Al 0 .0121 O 0 .02679 N 0 .5539.

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The filter for converting white light using the above-described phosphor or phosphor mixture 5 is applied as the filter itself or in the form of a UV coating layer or a film on the surface of the filter, whereby a non-producer or user can directly and easily at low cost. In addition to the advantage that it can be changed to the lighting of the desired color temperature, it is very economical because it can significantly extend the life of the lighting.

In other words, the white light conversion filter (5) is more economical by reducing the amount of phosphor used when applied as a phosphor-containing UV coating layer on the above-mentioned matrix resin, and is environmentally friendly, since almost no volatile organic volatiles are produced. Productivity is remarkably high, and the formed coating film has high anti-scratch property, and if necessary, antistatic or stain resistance is easily added by adding an antistatic agent or antifouling agent known in the art. Can be given.

In addition, the white light obtained can be appropriately adjusted within a color temperature range of 3000 to 7000K simply and easily in accordance with various lighting conditions such as the user's preference or desired atmosphere.

On the other hand, examples of the light diffuser that may be optionally added in the present invention, a silicone resin (refractive index 1.43), polyacrylate (polyacrylate: 1.49), polyurethane (polyurethane: 1.51 refractive index), polyethylene ( polyethylene: refractive index 1.54), polypropylene: 1.46 refractive index, nylon (Nylon: refractive index 1.54), polystyrene (polystyrene: 1.59), polymethylmethacrylate: 1.49, polycarbonate: 1.59 Organic light-diffusing agents such as homopolymers such as) 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 to 2.71), iron oxide (2.90), Or any mixture thereof.

When the light diffuser is added, an average particle diameter of 0.2 to 30 µm, preferably 0.5 to 5 µm, and specifically 1.0 to 3.5 µm is used, and the amount of the light diffuser is 0.01 to 10.0 wt% based on the total weight of the composition, Preferably it is 0.1-5.0 weight%.

If the average particle diameter of the light diffuser is less than 0.2 μm, the transparency and light transmittance may be inferior, which is not preferable. On the contrary, if the average particle diameter exceeds 30 μm, the excitation of the phosphor may be insufficient or uneven, which is not the same. Can not do it.

If the amount of the light diffusing body added to the total weight of the white light conversion filter 5 is less than 0.01% by weight, it is difficult to obtain a desired light diffusion effect.On the contrary, if the amount exceeds 10.0% by weight, transparency or light transmittance may be inferior. It is not desirable to have.

When the above-mentioned light diffusing body having an average particle diameter of 0.2 to 30 µm, preferably 0.5 to 5 µm, and particularly 1.0 to 3.5 µm is added in an amount of 0.01 to 10% by weight, preferably 0.1 to 5% by weight, heat resistance The content of the transparent matrix resin is controlled by reducing the amount of the addition, but the content of the phosphor is unchanged.

On the other hand, when applying the photosynthesis promoting composition for LED according to the present invention as a UV coating layer, the coating film thickness is not limited, but is generally 1 ~ 250㎛, preferably about 3 ~ 100㎛.

On the other hand, when the phosphor is homogeneously mixed in the above-described matrix resin, the thickness of the white light conversion filter 5 is not limited in the present invention, but may be in the range of 0.5 mm to 5 mm.

The present invention has been described in detail so far, but it is not intended to limit the present invention only to illustrate 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 is within the scope of the present invention.

1: LED lighting lamp according to the present invention
2: Chip on Board
2a: blue LED chip 2b: + terminal
2c:-Terminal part 2d: PCB
2e: circular protrusion
3: heat sink
3a: fixing hole 3b: fixing groove
4: space part 5: (phosphor for white light conversion) filter
6: (filter) housing
6a: insertion groove 6b: press-in groove
6c: thread 6d: lateral heat dissipation port
7: double sided adhesive tape
8: Reflector 8a: round step
8b: wavy portion 8c: lower opening
8d: top opening 8e: fixing part
9: fastening means

Claims (10)

  1. A reflector;
    A blue LED chip of a chip on board (COB) type formed on an upper surface of a heat-sink and having a circular protrusion;
    It has an upper and lower opening, an insertion groove in the center of the inner circumferential portion, a press-in groove or a step of the upper portion, and is attached to the COB by double-sided adhesive tape in a state where the lower inner circumferential portion is in close contact with the outer circumference of the circular protrusion. A detachable housing in which a lower end of the reflector is attached to one press-in groove or step;
    It is composed of a phosphor filter for white light conversion is inserted into the insertion groove of the housing and spaced apart from the blue LED chip with a space.
    LED light lamp.
  2. The LED lamp of claim 1, wherein a fixing part is formed at a lower end of the outer circumference of the reflector, and a fixing hole is formed in the heat sink.
  3. The LED lighting lamp according to claim 1, further comprising a plurality of lateral heat dissipation holes below the side of the housing.
  4. delete
  5. delete
  6. delete
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  8. delete
  9. delete
  10. delete
KR1020100100809A 2010-10-15 2010-10-15 Led lamp having reflector KR101241232B1 (en)

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KR101241232B1 true KR101241232B1 (en) 2013-03-11

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103486455A (en) * 2012-07-05 2014-01-01 彩虹奥特姆(湖北)光电有限公司 LED (Light Emitting Diode) lamp with light energy adjusting effect
KR101648899B1 (en) * 2014-12-19 2016-08-17 배성동 COB lighting for air signboard

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100904082B1 (en) * 2008-06-02 2009-06-23 (주)콘포테크 Diffusion light apparatus using led lamp
KR100931266B1 (en) 2009-04-08 2009-12-11 주식회사 지엘비젼 Led lighting with broad and uniform light distribution
US20100259917A1 (en) * 2009-12-02 2010-10-14 Renaissance Lighting, Inc. Light fixture using uv solid state device and remote semiconductor nanophosphors to produce white light

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100904082B1 (en) * 2008-06-02 2009-06-23 (주)콘포테크 Diffusion light apparatus using led lamp
KR100931266B1 (en) 2009-04-08 2009-12-11 주식회사 지엘비젼 Led lighting with broad and uniform light distribution
US20100259917A1 (en) * 2009-12-02 2010-10-14 Renaissance Lighting, Inc. Light fixture using uv solid state device and remote semiconductor nanophosphors to produce white light

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