KR101753012B1 - Led lighting apparatus having diffusion plate adjustable color temperature - Google Patents

Abstract

According to an aspect of the present invention, there is provided a plasma display apparatus comprising: a PCB (110) having horizontally disposed circuit lines for applying driving power; An LED array (130) including an LED (120) emitting light; And a diffusing sheet plate 140 mounted on the illumination body frame 150 so as to be horizontally disposed at a lower position of the LED array 130 and diffusing and transmitting illumination light output from the LED 120 to the outside, The diffusion sheet plate 140 is made of a plurality of standards having color temperature bands of different sizes and is selectively mounted with a diffusion sheet plate 140 having a size suitable for the required color temperature, The color temperature value K and the color rendering index Ra of the transmitted illumination light are determined according to the blending ratio of the pigment.

Description

TECHNICAL FIELD [0001] The present invention relates to an LED lighting fixture having a diffuser sheet plate capable of adjusting a color temperature, and a method of manufacturing the LED lighting fixture.

[0001] The present invention relates to an LED lighting apparatus provided with a diffusion sheet plate capable of adjusting a color temperature and a method of manufacturing the same, and more particularly, And a method of manufacturing the LED lighting apparatus.

Generally, an LED is a semiconductor device that emits light by flowing a current to a compound such as gallium arsenide, and is widely used in a lighting field because of its long lifetime with low power consumption and high luminance. As with other light sources, such LEDs are manufactured to have various color temperatures ranging from a low color temperature to a high color temperature.

As shown in FIG. 1, according to the optical characteristics standard of the LED lighting fixture defined in the KS standard, eight color temperatures, such as 2,700K, 3,000K, 3,500K, 4,000K, 4,500K, 5,000K, 5,700K and 6,500K And the LED manufacturer manufactures LEDs according to the color temperature range (correlated color temperature K) specified for each color temperature band.

However, LEDs with high color temperature range of 5,700K or 6,500K, which provide a low color temperature range of 2,700K or 3,000K, or a high color temperature range that provides a bright atmosphere, are produced in large quantities by LED producers due to high demand. If you are manufacturing LEDs in color temperature range or not producing them by most companies, and you want to manufacture products using low-temperature color temperature LEDs in a manufacturer of lighting fixtures, secure LED parts with desired color temperature range And there were many difficulties in producing the lighting apparatus.

Japanese Patent Application Laid-Open No. 10-12085230 (November 14, 2011), a color temperature adjustable LED lighting and a method of manufacturing the same

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a color temperature control apparatus and a color temperature control method, which are manufactured with a plurality of standards having different color temperature bands, And a method of manufacturing the same, which is provided with a diffusion sheet plate capable of adjusting the color temperature of the illumination light output from the LED having a single color temperature and capable of adjusting the color temperature appropriately.

According to an aspect of the present invention, there is provided a plasma display apparatus comprising: a PCB (110) having horizontally disposed circuit lines for applying driving power; An LED array (130) including an LED (120) emitting light; And a diffusing sheet plate 140 mounted on the illumination body frame 150 so as to be horizontally disposed at a lower position of the LED array 130 and diffusing and transmitting illumination light output from the LED 120 to the outside, The diffusion sheet plate 140 is made of a plurality of standards having color temperature bands of different sizes and is selectively mounted with a diffusion sheet plate 140 having a size suitable for the required color temperature, The color temperature value K and the color rendering index Ra of the transmitted illumination light are determined according to the blending ratio of the pigment.

According to another aspect of the present invention, the diffusion sheet 140 may have a band width of 2,700 K, 3,000 K, 3,500 K, 4,000 K, 4,500 K, 5,000 K, 5,700 K, K band and 6,500K band, and the standard of the 2,700K band is formed by mixing 0.0006 to 0.0016 parts by weight of a fluorescent pigment with respect to 100 parts by weight of the base resin, and the fluorescent pigment is composed of red (R) fluorescent pigment (YR) fluorescent pigment is blended in a ratio of 7.2: 2.8 to realize a color temperature of 2,700K band and a color rendering index (Ra) of 75 or more. The standard of the 3,000K band is a fluorescent pigment of 0.0009 (R) fluorescent pigment and a yellow (YR) fluorescent pigment are mixed in a ratio of 7.2: 2.8 to realize a color temperature of 3,000K band and a color rendering index (Ra) of 75 or more, The standard of the 3,500 K band is the base resin 100 (R) fluorescent pigment and a yellow (YR) fluorescent pigment are mixed in a ratio of 7.2: 2.8, and the color temperature of 3,500K band and the color rendering index of 75 or more are added to the fluorescent pigment (Ra), and the standard of the 4,000K band is formed by mixing 0.0013 to 0.0023 parts by weight of a fluorescent pigment with respect to 100 parts by weight of a base resin, wherein the fluorescent pigment comprises a red (R) fluorescent pigment and a orange (YR) 7.2: 2.8 to realize color temperature of 4,000K band and color rendering index (Ra) of 75 or more, and the standard of 4,500K band is formed by mixing 0.0015 to 0.0025 parts by weight of fluorescent pigment with 100 parts by weight of base resin The fluorescent pigment includes a red (R) fluorescent pigment and a yellow (YR) fluorescent pigment in a ratio of 7.2: 2.8 to realize a color temperature of 4,500 K and a color rendering index (Ra) of 75 or more. Of base resin 100 (Y) fluorescent pigment and a red (R) fluorescent pigment are blended in a ratio of 7: 3 so that the color temperature of 5,000K band and the color rendering index of 75 or more are added to the fluorescent pigment in an amount of 0.0018 to 0.0028 parts by weight (Ra), and the standard of the 5,700K band is formed by mixing 0.0020 to 0.0030 parts by weight of a fluorescent pigment with respect to 100 parts by weight of a base resin, wherein the fluorescent pigment comprises a red fluorescent pigment and a yellow fluorescent pigment 7: 3 to realize color temperature of 5,700K band and color rendering index (Ra) of 75 or more, and the standard of 6,500K band is formed by mixing white fluorescent pigment with base resin. Is provided.

According to still another aspect of the present invention, the LED lighting apparatus is characterized in that the LED lighting apparatus is any one of a lighting apparatus such as a floodlight, an underwater lamp, a headlight, a streetlight, an indicator lamp, an explosion- LED lighting fixtures are provided.

According to another aspect of the present invention, the diffusion sheet plate 140 is formed using a fluorescent pigment having a structure selected from the following formulas (1a), (1b), and (1c).

[Formula 1a]

[Chemical Formula 1b]

[Chemical Formula 1c]

According to another aspect of the present invention, there is provided a method of manufacturing a fluorescent lamp, comprising: (a) a fluorescent pigment comprising a first reactor; (b) a naphthalimide-based compound comprising a second reactor; (c) a radical polymerizable monomer; And (d) an initiator; Wherein the first reactor and the second reactor are the same or different from each other and each independently selected from a vinyl group, a hydroxyl group, and a carboxyl group.

According to still another aspect of the present invention, there is provided a fluorescent pigment comprising: (a) at least one fluorescent pigment selected from the following formulas (1a), (1b) and (1c); (b) a naphthalimide compound of formula (2); (c) a radical polymerizable monomer; And (d) an initiator.

[Formula 1a]

[Chemical Formula 1b]

[Chemical Formula 1c]

(2)

According to another aspect of the present invention, there is provided a composition for preparing a diffusion sheet, wherein the component (a) is contained in an amount of 0.001 to 0.05 part by weight based on 100 parts by weight of the component (c).

According to another aspect of the present invention, there is provided a composition for preparing a diffusion sheet, wherein the component (b) is contained in an amount of 0.01 to 2 parts by weight based on 100 parts by weight of the component (c).

According to another feature of the present invention, the component (c) is at least one member selected from the group consisting of styrene, methylstyrene, ethylstyrene, fluorostyrene, chlorostyrene, vinyltoluene, methyl (meth) acrylate, Acrylate, octyl (meth) acrylate, stearyl (meth) acrylate, benzyl (meth) acrylate and glycidyl (meth) acrylate; The composition (d) is at least one selected from the group consisting of benzoyl peroxide, methyl ethyl ketone peroxide, and cumene hydroperoxide.

According to a further feature of the present invention, the composition may further comprise (e) a multifunctional crosslinking monomer, wherein component (e) is selected from the group consisting of divinylbenzene, ethylene glycol dimethacrylate, diethylene glycol methacrylate , Triethylene glycol dimethacrylate, and 1,6-hexanediol dimethacrylate. The composition for the production of a fluorescent arc sheet is provided.

(B) a naphthalimide compound represented by the following general formula (2); (c) a radically polymerizable monomer; and (c) at least one fluorescent pigment selected from the group consisting of And (d) performing a polymerization reaction on a composition for producing a diffusion sheet plate comprising an initiator.

[Formula 1a]

[Chemical Formula 1b]

[Chemical Formula 1c]

(2)

According to another aspect of the present invention, there is provided a method of manufacturing a plasma display panel, the method comprising: arranging a PCB (110) on which circuit lines for applying driving power are formed; An LED mounting step S220 of mounting an LED 120 that emits white illumination light on the lower surface of the PCB 110 to receive the driving power through the circuit line to form an LED array 130; An array mounting step S230 of horizontally mounting the LED array 130 on the illumination main body frame 150; And a diffusing sheet plate mounting step of mounting the diffusing sheet plate 140 diffusing and transmitting the illumination light output from the LED 120 to the outside of the illumination body frame 150 horizontally at a lower position of the PCB 110 The diffusion sheet attaching step S240 may include selectively mounting a diffusion sheet 140 having a size suitable for a desired color temperature by being manufactured in a plurality of sizes having different color temperature ranges, Wherein the color temperature value (K) and the color rendering index (Ra) of the transmitted illumination light are determined according to the blending ratio of the fluorescent pigment contained in the base resin.

According to another aspect of the present invention, the diffusion sheet plate 140 may have a thickness of 2,700 K, 3,000 K, 3,500 K, 4,000 K, 4,500 K, 6,500 K, 5,700K band, and 6,500K band, and the diffusion sheet plate mounting step (S240) is performed such that 0.0006 to 0.0016 parts by weight of a fluorescent pigment is mixed with 100 parts by weight of the base resin, and the fluorescent pigment is red R) fluorescent pigment and a yellow (YR) fluorescent pigment at a ratio of 7.2: 2.8 to realize a color temperature of the 2,700K band and a color rendering index (Ra) of 75 or more, and a fluorescent pigment of 0.0009 to 0.0019 (R) fluorescent pigment and a yellow (YR) fluorescent pigment in a ratio of 7.2: 2.8 to realize a color temperature of 3,000K band and a color rendering index (Ra) of 75 or more, 100 parts by weight of a resin, 0.0011 in a fluorescent pigment (R) fluorescent pigment and a yellow (YR) fluorescent pigment in a ratio of 7.2: 2.8 to realize a color temperature of 3,500K band and a color rendering index (Ra) of 75 or more. And 0.0013 to 0.0023 parts by weight of a fluorescent pigment are mixed with 100 parts by weight of a base resin. The fluorescent pigment is prepared by blending a red (R) fluorescent pigment and a yellow (YR) fluorescent pigment in a ratio of 7.2: 2.8, (R) fluorescent pigment and a yellow (YR) fluorescent pigment in an amount of from 7.2: 1 to 30: 1, and a color rendering index of 75 or more and a coloring index Ra of 75 or more, 2.8 to obtain a color temperature of 4,500 K and a color rendering index (Ra) of 75 or more, and stirring the mixture so that 0.0018 to 0.0028 parts by weight of a fluorescent pigment is mixed with 100 parts by weight of the base resin. The fluorescent pigment is yellow (Y) within (R) fluorescent pigment at a ratio of 7: 3 to realize a color temperature of 5,000K band and a color rendering index (Ra) of 75 or more, so that 0.0020 to 0.0030 parts by weight of fluorescent pigment is mixed with 100 parts by weight of the base resin (Y) fluorescent pigment in a ratio of 7: 3 to obtain a color temperature of 5,700 K and a color rendering index (Ra) of 75 or more. The stirring step S310 is a step of mixing the red (R) fluorescent pigment and the yellow An extrusion step (S320) of extruding the agitated substrate into a plate shape, a curing step (S330) of curing the extruded plate material, a cutting step (S340) of cutting the plate material hardened according to the design shape and finishing the exterior, And a diffusing sheet plate (140) made of a transparent resin is used.

As described above, according to the present invention,

First, a plurality of standards having different color temperature bands according to the blending ratio of fluorescent pigments contained therein, and a standard suitable for the color temperature required according to the installation place or use purpose of the lighting is selectively installed and the LED 120 It is possible to appropriately adjust the color temperature of the illumination light output from the light source. Therefore, manufacturers of lighting fixtures can manufacture LED lighting fixtures using 5,700K band or 6,500K band color temperature band, which is a color temperature band that can supply and receive components easily, without using LEDs of color temperature band where component supply and demand are limited. Thereby increasing productivity and reducing manufacturing costs.

Secondly, when the user changes the color temperature of the illumination light and intends to change the indoor atmosphere, the existing diffusing sheet plate is replaced with a diffusing sheet plate capable of transmitting the illumination light of a desired color temperature band without replacing the entire installed LED lighting apparatus It is possible to switch the indoor atmosphere only by reducing the cost of purchasing the LED lighting fixture and making it convenient for the user.

Thirdly, since the color rendering property having a size (color rendering index (Ra) 75 or more) equal to or more than the reference value in addition to the color temperature value can be realized according to the blending ratio of the fluorescent pigment, the LED lamp required by the KS standard can be manufactured, can do.

Fourth, the color temperature is controlled and the color rendering property is excellent as described above, but the light transmittance which does not cause the decrease of the light flux is secured compared with the existing diffusion sheet, thereby providing the illumination improvement effect.

FIG. 1 is a table showing optical characteristics standards of the LED lighting apparatus specified in the KS standard,
2 and 3 are an exploded perspective view showing a configuration of an LED lighting apparatus according to a preferred embodiment of the present invention,
FIG. 4 is a table showing fluorescence pigment blending ratios and measurement data for each color temperature band of a diffusion sheet according to a preferred embodiment of the present invention,
5A to 5H are graphs showing measurement data obtained by measuring optical characteristics of each color temperature band of a diffusion sheet according to a preferred embodiment of the present invention,
6 is a block diagram showing a procedure of a method of manufacturing an LED lighting apparatus according to a preferred embodiment of the present invention,
FIG. 7 is a block diagram showing a procedure of manufacturing a diffusion sheet according to a preferred embodiment of the present invention;
8A to 8J are a plan view, a front view, a bottom view, and a side view showing various forms of the LED lighting apparatus according to the preferred embodiment of the present invention,
FIG. 9 is a diagram showing the transmittance spectrum of the Orange diffuser sheet prepared in the preferred embodiment of the present invention.

The objects, features and advantages of the present invention will become more apparent from the following detailed description. Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

First, the configuration and function of the LED lighting apparatus 100 provided with the diffusion sheet sheet capable of adjusting the color temperature according to the preferred embodiment of the present invention will be described.

2 and 3, the LED lighting apparatus according to the preferred embodiment of the present invention includes the LED array 130 and the diffusion sheet plate 140.

The LED array 130 is driven by the supplied driving power and outputs illumination light. The LED array 130 includes a PCB 110 and a plurality of LEDs 120.

The PCB 110 is a printed circuit board that receives driving power from the outside and applies the driving power to the LED 120. The PCB 110 is horizontally disposed and a circuit line for supplying driving power for driving light emission is formed on the upper surface. In addition, if necessary, the PCB 110 may be supplied with commercial power and rectified in a DC form, and a power supply circuit for converting the driving power may be constructed.

The LED 120 is mounted on a lower surface of the PCB 110 to emit white light according to driving power applied through a circuit line.

Here, the LED 120 preferably has a high color temperature such as 5,700 K band or 6,500 K band so that the LED 120 can be adjusted to the illumination light of various color temperatures through the diffusion sheet 140.

The diffusing sheet plate 140 is a means for diffusing the illumination light of the LED 120 having the linearity uniformly and is mounted on the illumination body frame 150 so as to be horizontally disposed at a lower position of the LED array 130, And diffuse and transmit the illumination light output from the light source 120 to the outside.

Here, the diffusion sheet plate 140 is made of a plurality of standards having color temperature bands of different sizes, and a diffusion sheet plate 140 having a size suitable for the required color temperature is selectively mounted. The color temperature value K and the color rendering index Ra of the transmitted illumination light are adjusted according to the blending ratio of the fluorescent pigment contained therein.

As the base resin, PC (Polycarbonate), PS (Polystyrene) and acrylic (Aracrylic) may be used.

The diffusion sheet plate 140 may have a wavelength range of 2,700 K, 3,000 K, 3,500 K, 4,000 K, 4,500 K, and 1,500 K according to the optical characteristics standard according to the KS standard shown in FIG. It is preferable that the color filter is formed so as to have eight standards separated by the color temperature, such as the K band, the 5,000K band, the 5,700K band, and the 6,500K band, and the color rendering index of 75 (Ra) or more.

For this purpose, as shown in FIG. 4 and FIGS. 5A to 5H, the 2,700K band standard is formed by mixing 0.0006 to 0.0016 weight parts (preferably 0.0011 weight parts) of a fluorescent pigment with respect to 100 weight parts of the base resin The fluorescent pigment includes a red (R) fluorescent pigment and a yellow (YR) fluorescent pigment in a ratio of 7.2: 2.8 to realize a color temperature of 2,700K and a color rendering index (Ra) of 75 or more. (R) fluorescent pigment and a yellow (YR) fluorescent pigment in a ratio of 7.2: 2.8 are mixed with 100 parts by weight of a base resin by mixing 0.0009 to 0.0019 part by weight (preferably 0.0014 parts by weight) of a fluorescent pigment. To realize color temperature of 3,000K band and color rendering index (Ra) of 75 or more.

The standard of the 3,500 K band is formed by mixing 0.0011 to 0.0021 part by weight (preferably 0.0016 part by weight) of a fluorescent pigment with respect to 100 parts by weight of a base resin, and the fluorescent pigment is composed of a red fluorescent pigment and a yellow ) Fluorescent pigment is blended in a ratio of 7.2: 2.8 to realize a color temperature of 3,500K band and a color rendering index (Ra) of 75 or more. The standard of the 4,000K band is a fluorescent pigment of 0.0013 to 0.0023 (R) fluorescent pigment and a yellow (YR) fluorescent pigment are blended in a ratio of 7.2: 2.8, so that the color temperature of 4,000K band and the color rendering index (Ra ) Can be implemented.

In addition, the standard of the 4,500 K band is formed by mixing 0.001 to 0.0025 (preferably 0.0020 parts by weight) of a fluorescent pigment by weight with respect to 100 parts by weight of the base resin, and the fluorescent pigment is composed of a red fluorescent pigment and a yellow (YR) And a fluorescent pigment is blended in a ratio of 7.2: 2.8 to realize a color temperature of 4,500 K and a color rendering index (Ra) of 75 or more. The standard of the 5,000 K band is 0.0018 to 0.0028 parts by weight (Y) fluorescent pigment and a red (R) fluorescent pigment are blended in a ratio of 7: 3, so that the color temperature of 5,000K band and the color rendering index (Ra ) Can be implemented.

The standard of the 5,700K band is formed by mixing 0.0020 to 0.0030 part by weight (preferably 0.0025 part by weight) of a fluorescent pigment with respect to 100 parts by weight of the base resin, wherein the fluorescent pigment is composed of a red fluorescent pigment and a yellow ) Fluorescent pigment is mixed at a ratio of 7: 3 to realize a color temperature of 5,700K band and a color rendering index (Ra) of 75 or more, and the standard of 6,500K band can be molded by mixing white fluorescent pigment with base resin.

Here, the measurement data was measured using a lamp measurement system: KSP2000 and an integration sphere: HOOPU B in the environment of 24 ± 3 degrees Celsius, humidity of 45 ± 20 R.H.

Red of the red (R) fluorescent pigment has a color belonging to the wavelength 630 to 700 nm of the spectrum and has a K value of # da3f3a and a representative color coordinate value of 7.5R 4/14. have.

Yellow of the yellow (Y) fluorescent pigment has a color near 580 nm of the spectrum and has a K value of # ffdf3e and a representative color coordinate value of 5Y 8,5 / 14, and forgery colors include forsythia, chick color, banana There is color and lemon color.

The orange color of the orange (YR) fluorescent pigment has a # K3753adml K value and a representative color coordinate value of 2.5YR 6/14, and there is carrot color as the tolerance color.

Here, when the above-mentioned fluorescent pigment is deviated from the weight range and the mixing ratio range in which the above-mentioned fluorescent pigment is mixed, the color temperature value to be realized may not be included in the corresponding color temperature band. Even if the color temperature range is included in the color temperature band, 75, which is not consistent with the KS standard, and the sharpness of the illumination light is lowered.

2, the diffusion sheet plate 140 is disposed at a lower portion of the illumination body frame 150 and supports the lower periphery thereof in a ring-shaped support frame 151 assembled to the lower end of the illumination body frame 150, The diffusion sheet plate 140 itself may be mounted directly on the illumination body frame 150 by using fastening means such as a fastening screw.

Next, a method of manufacturing an LED lighting apparatus according to a preferred embodiment of the present invention will be described.

As shown in FIG. 6, the LED lighting apparatus manufacturing method according to the preferred embodiment of the present invention includes a PCB placement step S210, an LED mounting step S220, an array mounting step S230, and a diffusion sheet plate mounting step S240. .

First, the PCB placement step S210 is a step of preparing and disposing a PCB 110 on which a circuit line for applying driving power is formed, and the LED mounting step S220 is performed so as to receive driving power through the circuit line And an LED 120 that emits white illumination light is mounted on the lower surface of the PCB 110 to form the LED array 130.

The LED 120 mounted on the PCB 110 in the LED mounting step S220 may have a color temperature of 5,700K or 6,500K so as to be adjusted to the illumination light of various color temperatures through the diffusion sheet 140 It is preferable to use an LED.

The array mounting step S230 is a step of horizontally mounting the LED array 130 on which the PCB 110 and the LED 120 are assembled to the illuminating main body frame 150. As shown in Figure 2, 130 is mounted on the bottom surface of the lighting main body frame 150 so as to be closely contacted with the upper surface of the main body frame 150 so that the driving heat generated by the light emission driving of the LED 120 is emitted to the outside through the heat dissipating means such as the heat sink 160, .

The diffusion sheet mounting step S240 is a step of horizontally mounting the diffusion sheet 140 for diffusing and transmitting the illumination light output from the LED 120 to the outside. As shown in FIGS. 2 and 3, The diffusion sheet plate 140 is disposed on the lower periphery of the diffusion sheet plate 140 and is fixed to the support frame 150 for fastening the diffusion sheet plate 140 to the bottom surface of the illumination body frame 150 151).

Here, in the diffusion sheet attaching step S240, the diffusion sheet 140 having a size suitable for the required color temperature is manufactured by a plurality of standards having color temperature bands of different sizes, The color temperature value K and the color rendering index Ra of the transmitted illumination light are determined according to the blending ratio of the fluorescent pigment contained in the base resin.

7, the diffusion sheet attaching step (S240) may include a stirring step (S310) of injecting and stirring a fluorescent pigment into a base resin such as an acrylic resin, as shown in FIG. 7, A diffusion sheet sheet 140 manufactured through a cutting step S340 of cutting the hardened sheet material according to the design shape and cutting the outer surface of the sheet material S340, .

Here, in the stirring step (S310), 0.0006 to 0.0016 parts by weight of a fluorescent pigment is stirred to be mixed with 100 parts by weight of a base resin. The fluorescent pigment is mixed with a red (R) fluorescent pigment and a yellow (YR) (R) color rendering index of 75 or more, and the mixture is stirred so that 0.0009 to 0.0019 parts by weight of a fluorescent pigment is mixed with 100 parts by weight of the base resin, wherein the fluorescent pigment is a red (R) fluorescent pigment And a yellow (YR) fluorescent pigment at a ratio of 7.2: 2.8 to realize a color temperature of 3,000K and a color rendering index (Ra) of 75 or more.

In addition, 0.0011 to 0.0021 parts by weight of a fluorescent pigment is mixed with 100 parts by weight of the base resin. The fluorescent pigment is prepared by blending a red (R) fluorescent pigment and a yellow (YR) fluorescent pigment in a ratio of 7.2: 2.8, (R) fluorescent pigment and a yellow (YR) fluorescent pigment in an amount of from 7.2 to 30 parts by weight based on 100 parts by weight of the base resin and 0.0013 to 0.0023 parts by weight of a fluorescent pigment, : 2.8 to realize a color temperature of 4,000K and a color rendering index (Ra) of 75 or more.

Then, 0.0015 to 0.0025 parts by weight of a fluorescent pigment is mixed with 100 parts by weight of the base resin. The fluorescent pigment is prepared by mixing red (R) fluorescent pigment and orange (YR) fluorescent pigment in a ratio of 7.2: 2.8, (Y) fluorescent pigment and a red (R) fluorescent pigment in an amount of from 7 to 7, and a color rendering index of 75 or more and a color temperature of 75 or more, : 3 to realize color temperature of 5,000K band and color rendering index (Ra) of 75 or more.

Also, 0.0020 to 0.0030 parts by weight of a fluorescent pigment is mixed with 100 parts by weight of a base resin. The fluorescent pigment is prepared by mixing a red (R) fluorescent pigment and a yellow (Y) fluorescent pigment in a ratio of 7: It is preferable that color temperature and color rendering index (Ra) of 75 or more can be realized.

According to the LED lighting apparatus provided with the diffusing sheet plate capable of adjusting the color temperature according to the preferred embodiment of the present invention and the constitution and function of the method of manufacturing the same, different color temperature bands And the color temperature of the illumination light output from the LED 120 having a single color temperature can be appropriately adjusted by suitably selecting a standard suitable for the color temperature required according to the installation place or use purpose of the illumination. Therefore, manufacturers of lighting fixtures can manufacture LED lighting fixtures using 5,700K band or 6,500K band color temperature band, which is a color temperature band that can supply and receive components easily, without using LEDs of color temperature band where component supply and demand are limited. Thereby increasing productivity and reducing manufacturing costs.

In addition, when the user changes the color temperature of the illumination light to change the indoor atmosphere, the existing diffusing sheet plate is replaced with a diffusing sheet plate capable of transmitting the illumination light of a desired color temperature band without replacing the entire installed LED lighting apparatus It is possible to switch the indoor atmosphere only by reducing the cost of purchasing the LED lighting fixture and making it convenient for the user.

In addition, since the color rendering property having a size (color rendering index (Ra) of 75 or more) equal to or more than the reference value can be realized according to the mixing ratio of the fluorescent pigment, the LED lamp required by the KS standard can be manufactured, can do.

As described above, the color temperature is controlled and the color rendering property is excellent, but the light transmittance which does not cause the decrease of the light flux is secured compared to the existing diffusion sheet, thereby providing the illumination improvement effect.

Meanwhile, the LED lighting apparatus 100 according to the preferred embodiment of the present invention may be used for lighting of any one of a floodlighting lamp, an underwater lighting lamp, a headlight, a streetlight, an induction lamp, an explosion-proof luminaire, Lt; / RTI >

8A to 8J show various forms of the LED lighting apparatus 100 according to the preferred embodiment of the present invention. Referring to the drawings, the LED lighting apparatus according to the preferred embodiment of the present invention can be applied to various lighting devices such as a living room, a living room, a bedroom, a kitchen / bathroom, a dining table / pendant, It can have various forms depending on the use purpose and purpose.

That is, in the LED lighting apparatus 100 according to the preferred embodiment of the present invention, if the diffusion sheet 140 is disposed so as to face the LED 120 that outputs the illumination light and diffuse transmission of the illumination light, It is possible to control the color temperature of the illumination light by the diffusion sheet 140 irrespective of the form thereof by controlling the mixing ratio of the pigment.

On the other hand, conventionally, plastic products including a fluorescent colorant have high visibility and are widely applied not only to various signboards, road markings, vehicle displays, but also to various interior products. Such fluorescent products have no problem when used indoors, but have a problem in that the color is rapidly discolored when applied to an outdoor signboard having a relatively long exposure time to direct sunlight.

Generally, organic pigments have a high color purity, but their heat resistance, moisture resistance and ultraviolet light properties are remarkably deteriorated. This is because the stability of the organic pigment itself is deteriorated, but also closely related to the plastic resin characteristics. For example, if the organic pigment is poorly compatible with the resin, migration to the surface or agglomeration of the pigments may occur. If the glass transition temperature of the resin is low, the mobility of the organic pigment becomes large, The discoloration degree of the pigment may be promoted [Mol. Crys. Liq. Cryst. 2009, 514, 289].

In order to overcome the instability of such organic pigments, a UV absorber layer may be separately provided, or an antioxidant and a light stabilizer may be mixed with the resin. However, not only these measures can not sufficiently improve the stability of the fluorescent pigments, but also the added antioxidants and stabilizers precipitate as time goes by or move to the surface, thereby deteriorating the quality characteristics of the product .

A method of incorporating a maleic anhydride component into a polyolefin copolymer to suppress deterioration of a phosphor by moisture has been proposed (Korean Patent Application No. 10-2013-7034963), and a fluorescent film having improved durability (Korean Patent Application No. 10-2011-7029622), the stability of the fluorescent diffusion sheet 140 is not sufficiently increased, but also the manufacturing cost of the product is increased.

Therefore, the diffusion sheet 140 according to the preferred embodiment of the present invention not only blocks the ultraviolet ray region of 410 nm or less, but also includes a reactor in which all of the pigment to be added can be chemically bonded to the acrylic resin, Thus, the discoloration phenomenon, which is the greatest problem of the diffusion sheet, can be remarkably improved and high durability can be realized.

For this purpose, the present invention firstly synthesizes a fluorescent dye having a reactive group capable of reacting with an acrylic monomer, and the fluorescent dye can be chemically bonded to an acrylic high-impact chain by introducing it into an acrylic sheet, A naphthalimide compound which completely blocks the ultraviolet region of the naphthalimide compound may be used. In this case, the naphthalimide compound may also have a reactor capable of chemically reacting with the acrylic monomer.

Hereinafter, various aspects and various embodiments of the present invention will be described in more detail.

One aspect of the present invention is a fluorescent lamp comprising: (a) a fluorescent pigment comprising a first reactor; (b) a naphthalimide-based compound comprising a second reactor; (c) a radical polymerizable monomer; And (d) an initiator. Here, the first reactor and the second reactor may be the same or different from each other, and each independently selected from a vinyl group, a hydroxyl group, and a carboxyl group.

(A) at least one fluorescent pigment selected from the following general formulas (1a), (1b) and (1c); (b) a naphthalimide compound of formula (2); (c) a radical polymerizable monomer; And (d) an initiator.

[Formula 1a]

[Chemical Formula 1b]

[Chemical Formula 1c]

(2)

According to one embodiment, the component (a) is contained in an amount of 0.001 to 0.05 parts by weight, more preferably 0.005 to 0.03 parts by weight based on 100 parts by weight of the component (c). If the content is less than 0.005 parts by weight, the fluorescent coloring performance is lowered. If the content is larger than 0.03 parts by weight, the color becomes too dark, thereby decreasing the transmittance of the fluorescent diffusion sheet 140 and increasing the manufacturing cost.

According to another embodiment, the component (b) is contained in an amount of 0.01 to 2 parts by weight, more preferably 0.05 to 1.5 parts by weight based on 100 parts by weight of the component (c). If the content is less than 0.05 part by weight, the light resistance is not improved by ultraviolet ray shielding. If the content is more than 1.5 parts by weight, haze due to deposition or migration occurs to lower the transmittance of the fluorescent diffusion sheet 140, .

(Meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, ethyl (Meth) acrylate, stearyl (meth) acrylate, benzyl (meth) acrylate and glycidyl (meth) acrylate. In addition, the initiator is at least one selected from benzoyl peroxide, methyl ethyl ketone peroxide, and cumene hydroperoxide.

According to another embodiment, the composition may further comprise (e) a polyfunctional crosslinking monomer, wherein component (e) is selected from the group consisting of divinylbenzene, ethylene glycol dimethacrylate, diethylene glycol methacrylate, Ethylene glycol dimethacrylate, 1,6-hexanediol dimethacrylate, and the like.

(B) a naphthalimide compound of the formula (2), (c) a radical polymerizable monomer, and (d) at least one fluorescent pigment selected from the group consisting of The present invention relates to a method for producing a diffusion sheet comprising a step of performing a polymerization reaction on a composition for producing a diffusion sheet comprising an initiator.

Another aspect of the present invention relates to a diffuser sheet plate made using the composition for preparing a diffuser sheet according to various embodiments of the present invention.

Hereinafter, other embodiments and aspects of the present invention will be described in more detail. However, the scope and contents of the present invention can not be limited by the following description.

Generally, a fluorescent dye is mixed with various polymer products in order to produce a diffusion sheet. In general, acrylic resin, polycarbonate resin, polyethylene terephthalate resin and polypropylene resin are mixed and commercialized. In the case of polycarbonate resin, polyethylene terephthalate resin and polypropylene resin, the sheet is formed by a continuous operation by an extrusion method, while in the case of an acrylic resin, it is produced by a casting method in units of a sheet.

On the other hand, in the case of fluorescent pigments, fluorescent pigments of Lumogen F series commercially available from BASF are representative, and although they are known to have excellent durability as compared with general fluorescent pigments, they are also limited to direct use in outdoor fluorescent products.

Accordingly, the present inventors first synthesized a naphthalimide-based compound having a fluorescent dye having a reactor capable of reacting with an acrylic monomer and a reactor completely blocking the ultraviolet region of 410 nm or less, It was confirmed that a diffusion sheet having excellent durability can be produced by chemically bonding to a high injection chain.

The method of producing the diffusion sheet 140 of the present invention is performed by using a chemical reaction commonly used in the art. In the present invention, such a production method is not particularly limited.

The radically polymerizable monomer is not particularly limited as long as it can be copolymerized with a vinyl-based crosslinking monomer. Specific examples of the radical polymerizable monomer include aromatic vinyl compounds such as styrene, methylstyrene, ethylstyrene, fluorostyrene, chlorostyrene, and vinyltoluene; Acrylates such as methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, octyl (meth) acrylate, stearyl And the like; These monomers may be used singly or in combination of two or more.

Polyfunctional crosslinking monomers may also be used for crosslinking between polymer chains, such as divinylbenzene, ethylene glycol dimethacrylate, diethylene glycol methacrylate, triethylene glycol dimethacrylate, 1,6-hexanediol Dimethacrylate and the like; These may be used alone or in combination of two or more.

The initiator can be used without particular limitation as long as it can form a free radical. For example, benzoyl peroxide, methyl ethyl ketone peroxide, cumene hydroperoxide and the like can be used.

Further, acrylic monomers capable of reacting with a compound having a hydroxy or carboxyl group can be used. For example, acrylic acid, 2-hydroxyethyl methacrylate, glycidyl acrylate and the like can be used.

In the case of a fluorescent pigment having a reactor, a fluorescent pigment having a vinyl group, a hydroxyl group or a carboxyl group can be used without any limitation and is not particularly limited.

The content of the fluorescent pigment is preferably 0.001 to 0.05 part by weight based on 100 parts by weight of the total monomers. If the content of the fluorescent pigment is less than 0.005 parts by weight, the fluorescent coloring performance is lowered. If the content of the fluorescent pigment is more than 0.03 parts by weight, the color becomes too dark and the transmittance of the fluorescent diffuser sheet 140 is lowered And the manufacturing cost is increased.

A naphthalimide-based compound is suitable for a compound that transmits visible light while absorbing a region of 410 nm or less. This compound is also a naphthalimide-based compound having a vinyl group, a hydroxyl group, or a carboxy group, And is not particularly limited.

The content is preferably 0.01 to 2 parts by weight based on 100 parts by weight of the total monomers. If the content of the fluorescent pigment is less than 0.05 part by weight, the effect of improving the light resistance by ultraviolet ray shielding is not exhibited. If the content of the fluorescent pigment is more than 1.5 parts by weight, haze due to migration or precipitation occurs, There is a disadvantage that not only the permeability of the sheet plate 140 is lowered but also the manufacturing cost is increased.

Hereinafter, the present invention will be described in more detail with reference to Examples and the like, but the scope and content of the present invention can not be construed to be limited or limited by the following Examples. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the present invention as set forth in the following claims. It is of course also within the scope of the claims.

In addition, the experimental results presented below only show representative experimental results of the embodiments and the comparative examples, and the respective effects of various embodiments of the present invention which are not explicitly described below will be specifically described in the corresponding part.

Example

Production Example 1: Preparation of orange fluorescent pigment having a reactor

10 g of perylene-3,4,9,10-tetracarboxylic dianhydride, 16.67 g of 4-bromo-2,6-diisopropylaniline and 250 mL of quinoline were heated to 210 DEG C under argon, and 17 I stayed for hours. After cooling to room temperature, crystals were precipitated with methanol, filtered and dried. 10 g of the dried powder was mixed with 100 g of methanol together with 10 g of K2CO3, and the mixture was heated to 80 DEG C and stirred for 12 hours. After the reaction was cooled to room temperature, crystals were precipitated with water, filtered and dried. 10 g of the dried powder was mixed with 0.72 g of acryloyl chloride and 30 g of dioxane, followed by heating at 100 DEG C for 3 hours. The reaction product was cooled to room temperature, and crystals were precipitated by using water. The crystals were filtered out and dried to obtain an orange fluorescent substance having a structure represented by the following formula (1a).

[Formula 1a]

Production Example 2: Preparation of Red Fluorescent Pigment Having Reactor

10 g of 1,6,7,12-tetrachlorperylene-3,4,9,10-tetracarboxylic dianhydride, 16.67 g of diisopropylaniline and 250 ml of propionic acid were heated to 80 DEG C under argon, and at this temperature It was left for 17 hours. After cooling to room temperature, crystals were precipitated with water, filtered and dried. 5 g of the dried powder was mixed with 8.14 g of 4-hydroxyphenylethyl alcohol and 4.07 g of K2CO3 and mixed with 100 mL of DMF, and the mixture was heated to 120 DEG C and stirred for 12 hours. After the reaction was cooled to room temperature, crystals were precipitated using methanol, filtered and dried. 2.7 g of the dried powder was mixed with 0.72 g of acryloyl chloride and 30 g of dioxane, followed by heating at 100 DEG C for 3 hours.

The reaction product was cooled to room temperature, and crystals were precipitated by using water. The precipitated crystals were filtered and dried to obtain a red phosphor having a structure represented by the following formula (1b).

[Chemical Formula 1b]

Production Example 3: Preparation of Yellow-Green fluorescent pigment having a reactor

10 g of 3,9-perylene dicarboxylic acid was dissolved in 50 mL of methylene chloride, 10 g of NBS (N-bromosuccinimide) was added, and the mixture was stirred for 1 hour. Crystals were precipitated using methanol, filtered and dried. 5 g of the dried powder was mixed with 1.5 g of CuCN and 50 mL of DMF, and then the mixture was heated to 120 DEG C and stirred for 12 hours. After the reaction was cooled to room temperature, crystals were precipitated using methanol, filtered and dried. 2.7 g of the dried powder was mixed with 0.72 g of acryloyl chloride and 30 g of dioxane, followed by heating at 100 DEG C for 3 hours. The reaction product was cooled to room temperature, and crystals were precipitated using water. The precipitate was filtered and dried to obtain a Yellow-Green fluorescent substance having the following formula (1c).

[Chemical Formula 1c]

Production Example 4: Preparation of naphthalimide pigment having a reactor

10 g of 4-bromo-1,8-naphthalic anhydride was mixed with 5 g of 2-ethylhexylamine and 100 g of ethanol, and the mixture was heated to 80 DEG C and stirred for 12 hours. After the reaction was cooled to room temperature, crystals were precipitated with water, filtered and dried. 10 g of the dried powder was mixed with 100 g of methanol together with 10 g of K2CO3, and the mixture was heated to 80 DEG C and stirred for 12 hours. After the reaction was cooled to room temperature, crystals were precipitated with water, filtered and dried. 10 g of the dried powder was mixed with 0.72 g of acryloyl chloride and 30 g of dioxane, followed by heating at 100 DEG C for 3 hours. The reaction product was cooled to room temperature, and crystals were precipitated by using water. The precipitate was filtered and dried to obtain a naphthalimide compound having a structure represented by the following formula (2).

(2)

Example 1

150 g of methyl methacrylate, 150 g of initiator 2,2-azobis-2,4-dimethylvalero

2 g of nitrile, 0.03 g of the orange fluorescent pigment synthesized in Preparation Example 1 and 1.5 g of the naphthalimide compound synthesized in Production Example 4 were mixed and then poured between glass plates and polymerized at 60 DEG C for 20 hours to prepare a diffusion sheet .

Example 2

A diffusion sheet was prepared in the same manner as in Example 1, except that the red fluorescent pigment synthesized in Preparation Example 2 was used instead of the orange fluorescent pigment synthesized in Production Example 1, and a diffusion sheet was prepared.

Example 3

A diffusion sheet was prepared in the same manner as in Example 1, except that the yellow-green fluorescent pigment synthesized in Preparation Example 3 was used instead of the orange fluorescent pigment synthesized in Preparation Example 1, and a diffusion sheet was prepared.

Comparative Example 1

A diffusion sheet plate was produced in the same manner as in Example 1 except that 1.5 g of the naphthalimide compound was not added.

Comparative Example 2

A diffusion sheet was prepared in the same manner as in Example 1, except that 1.5 g of a benzotriazole-based UV absorber (T-928, manufactured by BASF) was added in place of the naphthalimide compound.

Comparative Example 3

A diffusion sheet was prepared in the same manner as in Example 1 except that 0.03 g of Lumogen F Orange-240 (BASF) was added instead of the orange fluorescent pigment synthesized in Preparation Example 1.

Comparative Example 4

A diffusion sheet was prepared in the same manner as in Comparative Example 2, except that 0.03 g of Lumogen F Orange-240 (BASF) was added instead of the orange fluorescent pigment synthesized in Preparation Example 1.

Evaluation example

The transmittance (T) in the visible light region was measured using a spectrophotometer (Lamda 950 spectrophotometer, manufactured by Perkin-Elmer) of the fluorescent diffusion sheet 140 prepared in Example 1-3 and Comparative Example 1-4 FIG. 9 shows the spectrum of the orange fluorescent diffusing sheet plate 140 prepared in Example 1. FIG.

On the other hand, the light resistance of the sheets was evaluated using QUV Tester (Q-Lab) (60 ° C, 100 hours, UVA 340 lamp). The results are summarized in Table 1 below. When the difference in transmittance before and after the light resistance test (? T) was less than 2%, the case of 2 to 3% and the case of exceeding 3% were indicated by O,?, X, respectively.

As can be seen from the above Examples 1 to 3, it was confirmed that the diffusion sheet sheet containing the reactive fluorescent pigment and the reactive naphthalimide-based compound showed excellent light resistance performance. On the other hand, it was confirmed that the light resistance was significantly lowered in the case of no reaction type naphthalimide compound (Comparative Example 1), in the case of using general non-reaction type UV absorbing agent (Comparative Example 2) It was confirmed that the light resistance was significantly reduced regardless of the form of the UV absorber in Comparative Examples 3 and 4).

Since the fluorescent dye used in the present invention has a reactor capable of copolymerizing with an acrylic monomer, the fluorescent dye can be present in a form chemically bonded to the acrylic polymer chain, and therefore, the durability A diffusion sheet plate can be provided.

Also provided is a diffusion sheet having significantly improved light resistance by simultaneously using a reactive pigment that completely blocks the region of 410 nm or less while transmitting visible light.

On the other hand, since both the fluorescent pigment used and the naphthalimide compound absorbing the region of 410 nm or less are chemically bonded to the acrylic polymer main chain, they can completely eliminate the phenomenon that these low-abundance compounds migrate or move to the surface, A very excellent diffusion sheet plate can be provided.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be clear to those who have knowledge.

100 ... LED lighting fixture 110 ... PCB
120 ... LED 130 ... LED array
140 ... diffuse sheet plate 150 ... lighting body frame
160 ... Heatsink
S210 ... PCB placement step S220 ... LED mounting step
S230 ... array mounting step S240 ... diffusion sheet plate mounting step
S310 Stirring step S320 Extrusion step
S330 ... curing step S340 ... cutting step

Claims (3)

An LED 120 mounted on a lower surface of the PCB 110 to emit white illumination light according to driving power applied through a circuit line, a PCB 110 mounted horizontally and having a circuit line for applying driving power, An LED array 130 including a plurality of LEDs 130; And a diffusion sheet plate 140 mounted on the illumination body frame 150 so as to be horizontally disposed at a lower position of the LED array 130 and diffusing and transmitting illumination light output from the LED 120 to the outside,
The diffusion sheet plate (140)
And is attached to the illumination main body frame 150 in a state in which the lower periphery thereof is supported by a ring-shaped support frame 151 assembled to the lower end of the illumination main body frame 150,
A diffusion sheet 140 having a color temperature band of a desired size manufactured by a plurality of standards having different color temperature ranges is selectively mounted, and each standard is different from the transmission sheet 140 according to the blending ratio of the fluorescent pigment contained in the base resin The color temperature value K of the illumination light and the color rendering index Ra are determined,
The LED lighting fixture according to any one of claims 1 to 3, wherein the LED lighting fixture is formed using a fluorescent pigment having a structure selected from the following formulas (1a), (1b) and (1c).
[Formula 1a]

[Chemical Formula 1b]

[Chemical Formula 1c]

The method according to claim 1,
Wherein the LED lighting apparatus is one of lighting means such as a flood lighting lamp, an underwater lighting lamp, a headlight, a street lamp, an induction lamp, an explosion-proof luminaire, an indoor lighting lamp, a down light or a landscape lighting fixture.
A PCB placement step S210 of disposing a PCB 110 on which a circuit line for applying driving power is formed;
An LED mounting step S220 of mounting an LED 120 that emits white illumination light on the lower surface of the PCB 110 to receive the driving power through the circuit line to form an LED array 130;
An array mounting step S230 of horizontally mounting the LED array 130 on the illumination main body frame 150; And
A diffusing sheet plate mounting step S240 for mounting the diffusing sheet plate 140 diffusing and transmitting the illumination light output from the LED 120 to the outside of the illumination body frame 150 horizontally at a lower position of the PCB 110 ), ≪ / RTI >
The diffusion sheet plate mounting step (S240)
Shaped support frame 151 assembled to the lower end of the illumination body frame 150 is mounted on the illumination body frame 150 in a state in which the lower periphery of the diffusion sheet plate 140 is supported,
A diffusion sheet 140 having a color temperature band of a desired size manufactured by a plurality of standards having color temperature bands of different sizes is selectively mounted, and each standard is different from the transmission sheet 140 according to the mixing ratio of the fluorescent pigment contained in the base resin The color temperature index K and the color rendering index Ra of the illumination light are determined and the diffusion sheet plate 140 is formed using a fluorescent pigment having a structure selected from the following formulas (1a), (1b) and (1c) LED lighting fixture manufacturing method.

[Formula 1a]

[Chemical Formula 1b]

[Chemical Formula 1c]

Images