KR100919175B1 - Box type led lighting device - Google Patents

Abstract

PURPOSE: A box type led lighting device is provided to increase radiation efficiency by coating a non-conductive reflective material on a substrate and increasing reflective efficiency within a light apparatus. CONSTITUTION: A box type led lighting device includes a substrate(110), a plurality of LED(120), a plurality of lens(130), and a translucent diffusion cover. A plurality of grooves are formed on front side of a substrate, and the plural LED are mounted on the bottom of the groove formed on the substrate. A plurality of lenses covers the each surface of LED, and a plurality of lens inflects the light emitted from the LED. The translucent diffusion cover covers the front side of the substrate. The translucent diffusion cover diffuses the light emitted from the plural LED.

Description

Box type LED lighting device with a wavelength that makes people feel comfortable {Box type LED lighting device}

The present invention relates to a light emitting diode (LED) lighting fixture, and more particularly, can replace a box-type fluorescent lamp currently used, high reflection efficiency and diffusion efficiency, the box-type LED that comes out the wavelength that gives the most comfortable feeling to humans Relates to a lighting fixture.

Common light bulbs used for lighting include fluorescent, incandescent or industrial neon lamps, most of which are gas discharge tube configurations in which gas is injected into a glass tube.

In the case of the general light bulbs described above, it may be the cause of air pollution when the gas leaks due to the burnout of the glass tube, and when the brightness is to be brightened, the power consumption increases accordingly, and power line construction must be performed accordingly, so There were problems such as excessive maintenance costs.

On the other hand, as an alternative to solve the problem of the above-mentioned bulbs, in recent years, the development of lighting fixtures using LEDs with low power consumption has been proposed. In the case of LED lighting fixtures, LEDs having high brightness and high lifespan are applied, with high lifetime. Intense light emission is possible.

However, in the case of the LED luminaire, while having the above-mentioned advantages, the color rendition (Color Rendition) indicating the fidelity of the color of the illuminated object is dropped when the light is emitted in a short wavelength can cause eye fatigue, in the form of a general circular Unlike the internal structure of the box-type fluorescent lamp attached to the ceiling, the LED is mounted on the substrate, so that intense light is emitted in a space located below the LED luminaire, while luminous efficiency is inferior in other spaces.

In addition, a lot of heat is generated due to the intense light emission of the LED, there may be a glare problem because the LED light source is not properly concealed.

Accordingly, there is a need for a box-type LED luminaire that can solve these problems and completely replace the box-type fluorescent lamps.

The problem to be solved by the present invention can completely replace the box-type fluorescent lamps that are currently used at the same time, and can produce a variety of designs, by emitting light close to natural light through high color rendering gives a comfortable feeling to humans, reflection To provide a box type LED lighting fixture with high efficiency and diffusion efficiency.

Box-shaped LED lighting apparatus according to an embodiment of the present invention for achieving the above object is a substrate with a plurality of grooves formed on the front; A plurality of LEDs each mounted on a bottom surface of a groove formed in the substrate; A plurality of lenses covering surfaces of each of the LEDs and refracting light emitted from the LEDs; And a translucent diffusion cover covering a front surface of the substrate and diffusing light emitted from the plurality of LEDs.

At this time, the box-shaped LED lighting device according to the invention is characterized in that the light having at least three wavelengths within the range of 400 ~ 750nm through the translucent diffusion cover to emit a wavelength that gives a comfortable feeling to the human being .

In addition, the box-shaped LED lighting device according to the present invention, in order to improve the reflection efficiency of light emitted from the LED, the portion other than the bottom surface of the plurality of grooves in the substrate relative to 100 parts by weight of the hydroxy group-containing acrylate compound, A non-conductive reflective coating layer including 10 to 30 parts by weight of polydiorganosiloxane, 5 to 15 parts by weight of bismuth oxide glass frit, 5 to 10 parts by weight of ammonium fluoride, and 5 to 10 parts by weight of sodium P-phenol sulfonate salt is formed. It is characterized by.

The box-type LED lighting device according to the present invention can replace the box-type fluorescent lamps that are generally used, and also can be applied to various designs such as stars, circles, and squares. In addition, by emitting light close to the natural light of three or seven wavelengths can give a comfortable feeling to humans.

In addition, the box-type LED lighting fixture according to the present invention has the advantage of increasing the reflection efficiency in the luminaire by coating a non-conductive reflective material on the substrate, the overall luminous efficiency.

1 is a schematic cross-sectional view of a box-shaped LED lighting fixture according to an embodiment of the present invention.

Figure 2 schematically shows that the coating layer is formed on the surface of the front surface of the substrate.

FIG. 3 schematically illustrates a plane of the box-shaped LED luminaire shown in FIG. 1.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, only the present embodiments to make the disclosure of the present invention complete, and common knowledge in the art to which the present invention pertains. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, a box type LED lighting device according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic cross-sectional view of a box-shaped LED lighting fixture according to an embodiment of the present invention.

Referring to FIG. 1, the box-shaped LED lighting device 100 according to the present invention includes a substrate 110, a plurality of LEDs 120, and a plurality of lenses 130.

A plurality of grooves are formed on the front surface of the substrate 110 to mount the LEDs. At this time, the plurality of grooves are preferably formed symmetrically in the vertical direction or the left and right direction at regular intervals. The substrate 110 may use a circular or square shape.

A plurality of light emitting diodes (LEDs) 120 are mounted on bottom surfaces of grooves formed in the substrate 110, respectively. The plurality of LEDs 120 may be disposed to emit light uniformly according to the shape of the box to be formed. Each of the plurality of LEDs 120 is driven by being supplied with power through a power terminal (not shown) located on the ceiling, similar to a general box-type fluorescent lamp.

The outer shape of the box-shaped LED luminaire according to the invention is determined by a translucent diffusion cover (not shown) that is exposed to the outside. Therefore, the box-shaped LED lighting fixture can be applied to various designs, including symmetrical shapes such as square, circular, and star, depending on the shape of the translucent diffusion cover.

Here, the plurality of LEDs 120 is preferably composed of white LEDs or warm white LEDs emitting 3 or 7 wavelengths of light. This is because when the plurality of LEDs are composed of short-wavelength LEDs, color rendition of light emitted from the luminaire is reduced, which may cause eye fatigue.

The plurality of lenses 130 are formed to cover the surface of each of the LEDs 120, and refract light emitted from the LEDs. The reason why the lens 130 is employed in the present invention is that the general LED emits light strongly only in the straight direction, so that a part of the light emitted in the straight direction is refracted to emit the light as a whole.

Box-shaped LED lighting device according to the invention is a mixture of light having at least three wavelengths within the 400 ~ 750nm range is emitted to the outside. The human eye is known to have the most comfortable feeling in natural light. Natural light that the human eye can recognize is when 450 to 700 nm, that is, a variety of light is mixed within the visible light wavelength.

In the case of a conventional luminaire employing a single color of the LED, by emitting a single wavelength mainly, the color rendering is not tired, tired eyes and comfortable feeling, but in the present invention by employing a white LED or warm white LED By emitting several wavelengths in the visible range together, high color rendering can be realized, and accordingly, eye fatigue and a comfortable feeling can be achieved. The wavelength emitted from the white LED or the warm white LED may be three or seven wavelengths.

Therefore, the plurality of LEDs are composed of a white LED or a white white LED, and three wavelengths of light may be entirely emitted through the translucent diffusion cover accommodating the substrate 110, and seven wavelengths of light may be emitted. Therefore, it is closer to natural light than 3 wavelengths of light, which minimizes eye fatigue.

A heat-sink 140 made of aluminum may be formed on the rear surface of the substrate 110, that is, the ceiling side, to absorb heat generated when driving the plurality of LEDs 120 and to discharge the heat into the interior space of the ceiling. At this time, the back surface of the substrate 110 is in contact with the aluminum heat sink 140.

Figure 2 schematically shows that the coating layer is formed on the surface of the front surface of the substrate.

Referring to Figure 2, the box-shaped LED lighting device according to the present invention, in order to increase the reflection efficiency, the portion other than the bottom surface of the plurality of grooves in the substrate 110 is 100 parts by weight of the hydroxy group-containing acrylate compound, Reflections coated with a nonconductive reflective composition containing 10-30 parts by weight of diorgano siloxane, 5-15 parts by weight of bismuth oxide-based glass frit, 5-10 parts by weight of ammonium fluoride and 5-10 parts by weight of sodium P-phenolsulfonic acid salt The coating layer 210 is included.

The non-conductive reflective coating layer 210 made of the above materials is non-conductive and does not affect the circuit pattern formed on the substrate. The non-conductive reflective coating layer 210 reflects light emitted from each of the plurality of LEDs 120 to cover various parts of the translucent diffusion cover. Allow light with wavelengths to be emitted evenly.

The following experiment was performed to measure the reflectance of the reflective coating layer 210 made of the above materials.

1. Preparation of Specimen

In Example 1, a specimen having a thickness of 2 mm was prepared by injection molding by mixing 100 g of a hydroxy group-containing acrylate compound, 10 g of polydiorganosiloxane, 5 g of bismuth oxide glass frit, 5 g of ammonium fluoride, and 5 g of sodium P-phenolsulfonate salt. It was.

In Example 2, a specimen was prepared in the same manner as in Example 1 by mixing 100 g of a hydroxy group-containing acrylate compound, 30 g of polydiorganosiloxane, 15 g of bismuth oxide-based glass frit, 10 g of ammonium fluoride, and 10 g of sodium P-phenolsulfonate salt. Produced.

In Comparative Example 1, 100 g of a hydroxy group-containing acrylate compound, 5 g of polydiorgano siloxane, 10 g of bismuth oxide glass frit, 10 g of ammonium fluoride, and 3 g of sodium P-phenol sulfonic acid salt were mixed to prepare a specimen in the same manner as in Example 1. Produced.

In Comparative Example 2, 100 g of the hydroxy group-containing acrylate compound, 20 g of polydiorganosiloxane, 25 g of bismuth oxide glass frit, 10 g of ammonium fluoride, and 5 g of sodium P-phenol sulfonic acid salt were mixed to prepare a specimen in the same manner as in Example 1. Produced.

In Comparative Example 3, a specimen was prepared in the same manner as in Example 1 by mixing 100 g of a hydroxy group-containing acrylate compound, 10 g of polydiorganosiloxane, 5 g of bismuth oxide-based glass frit, 1 g of ammonium fluoride, and 9 g of sodium P-phenolsulfonate salt. Produced.

The compositions shown in Examples 1 to 2 and Comparative Examples 1 to 3 are summarized in Table 1.

TABLE 1

2. Reflectance Measurement and Evaluation Method

The reflectance was measured using a reflectometer (CM3500d, manufactured by Minolta, Japan) to measure reflectance at wavelengths of 470 nm for blue, 520 nm for green, and 650 nm for red.

When the silver reflectance was 100%, evaluation made 85% or more of reflectances into good (o), and made it into the defect (x) below.

3. Results and Analysis

The reflectance evaluation results are shown in Table 2.

TABLE 2

Referring to Table 2, in the case of Example 1, the reflectances were all good at 85% or more at 470 nm, 520 nm, and 650 nm, but in Comparative Example 1, at 470 nm and 650 nm, and in Comparative Example 2, at 650 nm, In the case of Example 3, the reflectance was relatively poor at 85% or less at 520 nm.

Accordingly, the reflective coating layer 210 of the present invention may exhibit excellent reflectance even though it is non-conductive. Therefore, the box-type LED lighting fixture according to the present invention can increase the reflection efficiency in the interior of the lighting fixture by that, the light of uniform three wavelengths or seven wavelengths are emitted to the outside.

FIG. 3 schematically illustrates a plane of the box-shaped LED luminaire shown in FIG. 1. Referring to FIG. 3, a plurality of grooves are formed on the front surface of the substrate 110, LEDs 120 and lenses 130 are formed in each of the plurality of grooves, and a coating layer 210 is formed on the wall surface of the grooves. It can be seen that.

The appearance of the box-shaped lighting device according to the present invention is a translucent diffusion cover (not shown). This may be made in a variety of shapes as described above, the substrate 110, LED 120, lens 130 and heatsink 140, such as shown in Figure 1 is located inside the translucent diffusion cover can be seen from the outside There will be no.

The translucent diffusion cover serves to transmit and diffuse the light emitted from each of the plurality of LEDs 120 to the outside in addition to protecting the LED 120 or the substrate from the outside.

In the present invention, the translucent diffusion cover is 10 to 20 parts by weight of ethyl 2- [3- (6-nitrobenzol [d] thiazol-2-yl) ureido] acetate, siliculized with respect to 100 parts by weight of polycarbonate resin 5 to 15 parts by weight of soda, 2 to 3 parts by weight of soda ash, 1 to 3 parts by weight of cryolite, 0.5 to 1.5 parts by weight of alumina, 0.8 to 2 parts by weight of lysate, 0.5 to 1.5 parts by weight of carbonate and 0.5 to 1.5 parts by weight of zinc. It may be made of an added translucent material.

If the diffusion cover is made of a transparent material, the LED light source is not concealed and tends to be severely glare. If the diffusion rate is low, intense illumination is provided from the space where the LED luminaire is installed to the lower space of the luminaire, but relative to other spaces. Intensive lighting is achieved.

Therefore, in the present invention, it is possible to prevent glare by concealing the LED light source through the translucent diffusion cover made of the material, it is possible to uniform illumination in the entire space where the LED lighting fixture is installed through a high diffusion rate of 90% or more. .

In order to measure the diffusion rate of the translucent diffusion cover, the following experiment was performed.

1. Fabrication of Light Diffusion Plate

In Example 1, polycarbonate resin 100g, ethyl 2- [3- (6-nitrobenzol [d] thiazol-2-yl) ureido] acetate 10g, sodium silicate 5g, soda ash 2g, cryolite 1g, alumina 0.5 A light diffuser plate was prepared in which g, Lissa 0.8g, 0.5 g of carbonate, and 0.5 g of zinc were mixed.

In Example 2, 100 g of a polycarbonate resin, 20 g of ethyl 2- [3- (6-nitrobenzol [d] thiazol-2-yl) ureido] acetate, 15 g of sodium silicate, 3 g of soda ash, 3 g of cryolite, alumina 1.5 A diffusion plate was prepared in which g, 2 g of lysa, 1.5 g of carbonate, and 1.5 g of zinc were mixed.

In Example 3, 100 g of polycarbonate resin, 15 g of ethyl 2- [3- (6-nitrobenzol [d] thiazol-2-yl) ureido] acetate, 10 g of sodium silicate, 2.5 g of soda ash, 2 g of cryolite, alumina A diffusion plate was prepared in which 1 g, Lissa 1.4 g, 1 g of carbonate, and 1 g of zinc were mixed.

In Comparative Example 1, polycarbonate resin 100g, ethyl 2- [3- (6-nitrobenzol [d] thiazol-2-yl) ureido] acetate 25g, sodium silicate 5g, soda ash 2g, cryolite 1g, alumina 0.5 A light diffuser plate was prepared in which g, Lissa 0.8g, 0.5 g of carbonate, and 0.5 g of zinc were mixed.

In Comparative Example 2, 100 g of polycarbonate resin, 10 g of ethyl 2- [3- (6-nitrobenzol [d] thiazol-2-yl) ureido] acetate, 20 g of sodium silicate, 2 g of soda ash, 1 g of cryolite, 0.5 alumina A light diffuser plate was prepared in which g, Lissa 0.8g, 0.5 g of carbonate, and 0.5 g of zinc were mixed.

In Comparative Example 3, polycarbonate resin 100g, ethyl 2- [3- (6-nitrobenzol [d] thiazol-2-yl) ureido] acetate 5g, sodium silicate 15g, soda ash 3g, cryolite 3g, alumina 1.5 A diffusion plate was prepared in which g, 2 g of lysa, 1.5 g of carbonate, and 1.5 g of zinc were mixed.

In Comparative Example 4, 100 g of a polycarbonate resin, 20 g of ethyl 2- [3- (6-nitrobenzol [d] thiazol-2-yl) ureido] acetate, 1 g of sodium silicate, 3 g of soda ash, 3 g of cryolite, alumina 1.5 A diffusion plate was prepared in which g, 2 g of lysa, 1.5 g of carbonate, and 1.5 g of zinc were mixed.

In Comparative Example 5, 100 g of polycarbonate resin, 20 g of ethyl 2- [3- (6-nitrobenzol [d] thiazol-2-yl) ureido] acetate, 15 g of sodium silicate, 5 g of soda ash, 0.5 g of cryolite, alumina A light diffuser plate containing 0.5 g, Lissa 0.8g, 0.5 g of carbonate, and 0.5 g of zinc was prepared.

In Comparative Example 6, 100 g of a polycarbonate resin, 15 g of ethyl 2- [3- (6-nitrobenzol [d] thiazol-2-yl) ureido] acetate, 10 g of sodium silicate, 2.5 g of soda ash, 2 g of cryolite, alumina A diffusion plate was prepared in which 5 g, Lissa 0.5g, 1 g of carbonate, and 1 g of zinc were mixed.

In Comparative Example 7, 100 g of a polycarbonate resin, 15 g of ethyl 2- [3- (6-nitrobenzol [d] thiazol-2-yl) ureido] acetate, 10 g of sodium silicate, 2.5 g of soda ash, 2 g of cryolite, alumina A diffusion plate was prepared in which 1 g, Lissa 1.4 g, 0.1 g of carbonate, and 4 g of zinc were mixed.

The compositions shown in Examples 1 to 3 and Comparative Examples 1 to 7 are summarized in Table 3.

TABLE 3

2. Measurement and calculation

According to Examples 1 to 5 and Comparative Examples 1 to 3, the diffusivity of the diffuser plates was measured using a variable photometer (GC-5000L, Denshoku, Japan) according to transmission angles of 0 degrees, 20 degrees, and 70 degrees. Intensities (I ₀ , I ₂₀ , I ₇₀ ) were measured and calculated based on the formula (I ₂₀ + I ₇₀ ) / (2 XI ₀ ) X 100.

3. Results and Analysis

Table 4 summarizes the results of measuring the light diffusion rate and the light scattering rate of Examples 1 to 4 and Comparative Examples 1 to 7 using the variable photometer.

TABLE 4

Referring to Table 4, the diffusion plates manufactured in Examples 1 to 3 showed a light diffusion rate of 90% or more. However, the diffusion plates manufactured in Comparative Examples 1 to 7 had a relatively low level of 80 to 86%. The light diffusion rate is shown.

Therefore, the translucent diffusion cover used in the present invention is prepared by mixing a suitable amount of ethyl 2- [3- (6-nitrobenzol [d] thiazol-2-yl) ureido] acetate with respect to the polycarbonate resin. The light diffusion rate can be shown, so that even lighting is provided throughout the space where the LED lighting fixture is installed.

Although the above has been described with reference to one embodiment of the present invention, various changes and modifications can be made at the level of those skilled in the art. Such changes and modifications may belong to the present invention without departing from the scope of the present invention. Therefore, the scope of the present invention will be determined by the claims described below.

Claims (5)

A substrate having a plurality of grooves formed on a front surface thereof; A plurality of LEDs each mounted on a bottom surface of a groove formed in the substrate; A plurality of lenses covering surfaces of each of the LEDs and refracting light emitted from the LEDs; And A translucent diffusion cover covering a front surface of the substrate and diffusing light emitted from the plurality of LEDs; Light having at least three wavelengths within the range of 400 to 750 nm is emitted to the outside through the translucent diffusion cover. 10-30 weight part of polydiorganosiloxane, 5-15 weight part of bismuth oxide type glass frits, and ammonium fluoride with respect to 100 weight part of hydroxy group containing acrylate compounds in the part other than the bottom surface of the said some groove | channel in the said board | substrate A non-conductive reflective coating layer containing 5 to 10 parts by weight and 5 to 10 parts by weight of sodium P-phenol sulfonate salt is formed. The translucent diffusion cover is 10 to 20 parts by weight of ethyl 2- [3- (6-nitrobenzol [d] thiazol-2-yl) ureido] acetate, and 5 to 5 parts of silicate per 100 parts by weight of polycarbonate resin. 15 parts by weight, 2 to 3 parts by weight of soda ash, 1 to 3 parts by weight of cryolite, 0.5 to 1.5 parts by weight of alumina, 0.8 to 2 parts by weight of lysate, 0.5 to 1.5 parts by weight of carbonate and 0.5 to 1.5 parts by weight of zinc Box-type LED lighting fixture, characterized in that. The method of claim 1, Box-shaped LED lighting apparatus characterized in that it further comprises a heat sink made of aluminum in contact with the back surface of the substrate. The method of claim 1, The plurality of LEDs are made of a white LED or a warm white LED, box-shaped LED lighting fixture, characterized in that the three or seven wavelength light is emitted through the translucent diffusion cover. delete The method of claim 1, Each of the plurality of LED is a box-shaped LED lighting device, characterized in that driven through the power supply terminal located on the ceiling.