WO2017039406A1

WO2017039406A1 - Biomaterial for led device using fluorescence protein, method for preparing same, and white led device using same

Info

Publication number: WO2017039406A1
Application number: PCT/KR2016/009881
Authority: WO
Inventors: 프래탑 래디 말렘시바; 석줄기; 박현수; 정성훈; 김종환; 박진호
Original assignee: 영남대학교 산학협력단
Priority date: 2015-09-04
Filing date: 2016-09-02
Publication date: 2017-03-09
Also published as: KR101770029B1; KR20170028613A

Abstract

The present invention relates to a biomaterial for an LED device and a white light emitting diode (LED) device using the same. The present invention can provide: an eco-friendly biomaterial for an LED device, the biomaterial containing no harmful substances by containing red, green, and yellow fluorescence proteins, composed of an organic material, at a predetermined ratio; a method for preparing the same; and a white LED device.

Description

Biomaterials for LED devices using fluorescent proteins, methods of manufacturing the same and white LED devices using the same

The present invention relates to a biomaterial for an LED device and a white light emitting diode (LED) device using the same, and more particularly to white light in a blue region using a fluorescent protein made of an organic material. The present invention relates to a biomaterial, a method of manufacturing the same, and a white LED device using the same.

Lighting using LED devices has a high efficiency of about 90% of light energy conversion efficiency compared to electric energy, and has a long service life of 50,000 hours or more. And because of its ultra-thin design, the range of products that can be applied is wide, and it is strong in shock and has excellent durability and stability. LED devices are replacing conventional lighting such as incandescent and fluorescent lamps with the advantages of high efficiency, long life, ultra-thin structure and durability.

LEDs can be classified into red LEDs, green LEDs, blue LEDs, and UV LEDs emitting ultraviolet rays, depending on the wavelength of light emitted. As a method of generating white light using an LED, a combination of an LED and a phosphor converting light wavelengths is widely used due to its simple structure and high color stability. LEDs are used a lot.

Representative blue LEDs include LEDs based on group III nitride semiconductors such as AlN, GaN, and InN. In particular, GaN-based LEDs have useful characteristics as light sources of white light because they generate light having a wavelength of about 450-500 nm.

1 is a view showing a white LED device 10 according to the prior art.

As shown in FIG. 1, the white LED device 10 according to the related art includes a PCB substrate 120 on which electrodes 121 are formed, a blue LED 100 provided on a PCB substrate, a blue LED 100, and an electrode. A wire 110 connecting the 121 and a yellow phosphor 200 formed on the blue LED 100. The white LED device 10 according to the related art uses a yellow phosphor (200, yellow phosphor, YAG: Ce) combined with a resin or epoxy together with the blue LED 100. The blue light generated by the blue LED 100 excites the yellow phosphor 200, and forms white light together with the red and green light generated by the excited yellow phosphor 200.

2 is a view showing the light emission characteristics of the white LED device 10 according to the prior art.

As shown in FIG. 2, the spectrum of light generated by the white LED device 10 according to the related art may be divided into a first region having a wavelength of 365 to 500 nm and a second region between 500 to 750 nm. The first region is a wavelength of light generated by a blue LED and is concentrated in a region of relatively short wavelength, and the second region is a wavelength of light generated by a yellow phosphor excited by a blue LED. Distributed into areas. The white LED device 10 may emit white light while light is generated across the first area and the second area.

However, the conventional yellow phosphor 200 and the white LED device 10 using the same include metals, inorganics, and chemicals that are harmful to the environment, and have high energy in the red spectral region due to high color temperature. High and high heat generation shortens the life of the yellow phosphor 200, there is a problem using expensive resin and epoxy.

It is an object of the present invention to provide an eco-friendly biomaterial for an LED device, a method of manufacturing the same, and a white LED device using the same, which does not contain a material harmful to the environment.

Another object of the present invention is to provide a biomaterial for an LED device having a high color temperature, a method of manufacturing the same, and a white LED device using the same.

Another object of the present invention is to provide a biomaterial for an LED device having a low manufacturing cost, a method of manufacturing the same, and a white LED device using the same.

The biomaterial for an LED device according to an embodiment of the present invention may include a first ratio of red fluorescent protein, a second ratio of green fluorescent protein, and a third ratio of yellow fluorescent protein.

In addition, the fluorescent material for an LED device according to an embodiment of the present invention may further include egg white.

The method of manufacturing a biomaterial for an LED device according to an embodiment of the present invention includes mixing red, green, and yellow fluorescent proteins, stirring the fluorescent protein mixture and egg-white to form a stirred substance, and Adding a surfactant to the agitate may include generating and collecting a precipitate.

In addition, the method of manufacturing a bio-material for an LED device according to an embodiment of the present invention may further comprise the step of drying the precipitate to produce a powder and mixing the powder with a resin.

The white LED device according to the embodiment of the present invention may include any one of the biomaterial for the LED device and a light emitting diode emitting blue light.

In addition, the white LED device according to an embodiment of the present invention includes a polyethylene formed on the light emitting diode, the biomaterial for the LED device may be formed on the polyethylene.

In addition, the white LED device according to an embodiment of the present invention includes a lens provided on the light emitting diode, the biomaterial for the LED device may be formed on the inner surface of the lens.

The biomaterial for LEDs according to the present invention may provide an environmentally friendly biomaterial for LED devices, a method for manufacturing the same, and a white LED device by including a fluorescent protein as an organic material.

In addition, the biomaterial for LEDs according to the present invention may provide a white LED device capable of generating white light close to white by adjusting the mixing ratio of red, green, and blue fluorescent proteins.

1 is a view showing a LED device according to the prior art.

2 is a view showing a spectrum of light generated by the LED device according to the prior art.

3 is a view showing a fluorescent protein according to an embodiment of the present invention.

4 is a diagram showing excitation and emission spectra of fluorescent proteins according to an embodiment of the present invention.

5 is a view showing a manufacturing process of a biomaterial for an LED device according to an embodiment of the present invention.

6 is a flowchart illustrating a manufacturing process of a biomaterial for an LED device according to an exemplary embodiment of the present invention.

7 is a view showing a first embodiment of the present invention, FIG. 8 is a second embodiment of the present invention, and FIG. 9 is a white LED device according to the third embodiment of the present invention.

FIG. 10 is a diagram illustrating a spectrum of light generated by an LED device according to an embodiment of the present invention at room temperature and above temperature.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

3 illustrates a fluorescent protein 310 according to an embodiment of the present invention.

As shown in FIG. 3, the fluorescent protein according to the present invention may include a green fluorescent protein 311, a yellow fluorescent protein 312, and a red fluorescent protein 313.

In general, as the phosphor for the white LED device 10, when the blue LED 100 is mixed with the wavelength of the light generated, the yellow phosphor 200 which may have a spectrum close to white is used. The biomaterial 300 according to the embodiment of the present invention may basically include the yellow fluorescent protein 312, but is not necessarily limited to the yellow fluorescent protein 312, and the red fluorescent protein 313 or the green fluorescent protein ( 311) may include fluorescent proteins 310 of various colors.

4 is a diagram illustrating excitation and emission spectra of fluorescent protein 310 according to an embodiment of the present invention. 4A to 4C show spectra of light to which green, yellow and red

fluorescent proteins

311, 312 and 313 are excited, and FIGS. 4D to 4F show excited green, yellow and red

fluorescent proteins

311, 312 and 313. Is a diagram showing an emission spectrum of?).

As shown in Figs. 4A to 4C, the green, yellow and red

fluorescent proteins

311, 312 and 313 differ slightly in the distribution of the respective excited spectra, but in general have the highest intensity at wavelengths in the 500-530 nm region. Hereinafter referred to as 'peak intensity', and shows a very low intensity at a wavelength of 550 nm or more.

As shown in Figs. 4D to 4F, the excited green, yellow and red

fluorescent proteins

311, 312 and 313 have a wavelength of peak intensity distributed between 500 and 550 nm, and have very low intensity at wavelengths of 500 nm or less. Indicates. That is, as shown in FIG. 4, the fluorescent protein 310 according to the exemplary embodiment of the present invention absorbs light having a wavelength shorter than 550 nm and emits light having a wavelength longer than 500 nm.

Since the fluorescent protein 310 according to the embodiment of the present invention has a different wavelength and spectrum distribution of peak intensity for each color, one or more of the fluorescent proteins 310 may be selected according to the spectrum of light emitted from the blue LED 100. White light can be generated by selection and combination. FIG. 5 is a view illustrating a manufacturing process of a biomaterial 300 for an LED device according to an exemplary embodiment of the present invention. As shown in FIG. 5, an LED according to the present invention is illustrated. The device biomaterial 300 may include a first ratio of red fluorescent protein 313, a second ratio of green fluorescent protein 311, and a third ratio of yellow fluorescent protein 312. The composition ratio of the mixed fluorescent protein 314 is 2: 4: 1 for green, yellow, and red

fluorescent proteins

311, 312, 313 to produce white light when mixed with the spectrum of the blue LED 100. You can mix. When mixed in the above ratio, the emission spectra of the green, yellow, and red

fluorescent proteins

311, 312, and 313 shown in FIG. 4 are adjusted according to each ratio of the fluorescent protein 310. Although a mixing ratio of 2: 4: 1 is illustrated in FIG. 5, the mixing ratio is not necessarily limited thereto, and the mixing ratio may be appropriately adjusted according to the emission spectrum of the blue LED 10 and the emission spectrum of the fluorescent protein 310.

In particular, the biomaterial 300 for the LED device according to the embodiment of the present invention may generate white light having various color temperatures by adjusting the mixing ratio of the fluorescent protein 310.

As shown in FIG. 5, the biomaterial 300 for the LED device according to the embodiment of the present invention may include a fluorescent protein 310 and an egg white (eg, egg-white).

Looking at the manufacturing process of the LED device biomaterial 300 according to an embodiment of the present invention in detail, using a stirrer, such as a magnetic stirrer (Magnetic Stirrer) and stirred in a glass 50mL egg white 320 for 4 hours (Iii) After stirring the egg white 320, the mixed fluorescent protein 314 is added and stirred again. The mixed fluorescent protein 314 and stirred egg white 320 are in the form of a solution because they are water soluble. A surfactant 330 is added to extract the biomaterial 300 from the solution. The surfactant 330 enhances the binding force between the egg white 320 and the fluorescent protein 310 through an ion-exchange reaction, and causes a precipitation reaction to cause the fluorescent protein 310 to be combined with the egg white 320. Generates a precipitate 350. The deposit 350 may be applied to the blue LED 100 to be used as the biomaterial 300 for the LED device.

The egg white 320 includes proteins, DNA and RNA, and the egg white 320 and the stirred fluorescent protein 310 cross-link with the DNA contained in the egg white 320. The fluorescent protein 310 crosslinking with the egg white 320 may maintain stable fluorescence even at a high temperature of 70 ° C. or higher. Therefore, the biomaterial 300 according to the embodiment of the present invention may be manufactured in the form of powder after collecting and drying the precipitate 350 based on stability at high temperature.

In the embodiment of the present invention shown in FIG. 5, cetyltrimethylammonium (330, Cetyltrimethylammonium, CTMA) may be added as a surfactant, but other types of surfactant may be added as long as it can cause an ion exchange reaction and a precipitation reaction.

6 is a flowchart illustrating a method 20 of manufacturing a biomaterial 300 for an LED device according to an exemplary embodiment of the present invention.

As shown in FIG. 6A, the method 20 for manufacturing the biomaterial 300 for an LED device according to an exemplary embodiment of the present invention includes mixing green, yellow, and red

fluorescent proteins

311, 312, and 313 (21). ), The mixed fluorescent protein 314 and the egg white 320 is stirred to form an agitation (22), and a surfactant (330, CTMA) is added to the agitator to generate and collect a precipitate (350). Step 23 and the deposit 350 may be applied to the blue LED (100).

In addition, as shown in Figure 6b, drying the precipitate 350 to produce a powder (24), mixing the powder with a resin (or epoxy) (25) and the powder and resin (or epoxy) The method may further include applying the mixture to the blue LED 100.

FIG. 7 shows a first embodiment of the present invention, FIG. 8 shows a second embodiment of the present invention, and FIG. 9 shows a white LED device 10 according to the third embodiment of the present invention. 7A, 8A, and 9A are perspective views showing a white LED device 10 according to an embodiment of the present invention, and FIGS. 7B, 8B and 9B are cross-sectional views taken along the line a-a '.

As shown in FIG. 7, the white LED device 10 according to the embodiment of the present invention includes a PCB substrate 120 having a cavity formed in the center, an electrode 121 formed on the cavity of the PCB substrate 120, A blue LED 100 formed on the cavity between the electrodes 121, a wire 110 electrically connecting the blue LED 100 and the electrode 121, and a biotechnology for LED devices formed on the blue LED 100. It may include material 300.

The biomaterial 300 for the LED device may include any one of the biomaterials 300 according to the embodiment of the present invention as described above.

As shown in FIG. 8, the white LED device 10 according to another embodiment of the present invention may further include a polyethylene 500 formed between the blue LED 100 and the biomaterial 300 for the LED device. . Since the polyethylene 500 transmits the light generated by the blue LED 100 and has low thermal conductivity, the polyethylene 500 reduces the heat transmitted by the blue LED 100 to the fluorescent protein 310. Therefore, the white LED device 10 according to the embodiment shown in FIG. 8 has improved stability at high temperature.

As shown in FIG. 9, the white LED device 10 according to another embodiment of the present invention includes a PCB substrate 120 having a cavity formed in the center thereof, and an electrode 121 formed on the cavity of the PCB substrate 120. , A blue LED 100 formed on the cavity between the electrodes 121, a wire 110 electrically connecting the blue LED 100 and the electrode 121, and an inner surface of the blue LED 100 from a blue LED 100. It may include the lens 400 and the biomaterial 300 for the LED device according to the embodiment of the present invention formed on the inner surface of the lens 400 spaced apart.

In the white LED device 10 according to the embodiment illustrated in FIG. 9, the biomaterial 300 for the LED device is spaced apart from the blue LED 100 for dissipating heat, and thus, the white LED device 10 may have a high temperature. It can reduce performance degradation.

10 is a view showing a spectrum of light generated by the white LED device 10 according to an embodiment of the present invention.

Fig. 10A shows the emission spectrum at room temperature, and Fig. 10B shows the emission spectrum at 70 ° C. As shown in FIG. 10, the white LED device 10 according to the exemplary embodiment of the present invention has a spectrum scattered over a first region of 350 to 500 nm and a second region of 500 to 750 nm. Compared with the emission spectrum of the white LED device 10 according to the prior art shown in Fig. Shows similar characteristics.

That is, the biomaterial 300 for the LED device and the white LED device 10 using the same according to the embodiment of the present invention use the fluorescent protein 310 to produce an eco-friendly white LED device 10 that does not contain harmful substances. Can provide.

Features, structures, effects, and the like described in the above embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. In addition, the features, structures, effects, and the like illustrated in the embodiments may be combined or modified with respect to other embodiments by those skilled in the art to which the embodiments belong. Therefore, contents related to such combinations and modifications should be construed as being included in the scope of the present invention.

In addition, the above description has been made with reference to the embodiments, which are merely examples and are not intended to limit the present invention, and those skilled in the art to which the present invention pertains may be illustrated as above without departing from the essential characteristics of the present embodiments. It will be appreciated that various modifications and applications are possible. For example, each component specifically shown in the embodiments may be modified. And differences relating to such modifications and applications will have to be construed as being included in the scope of the invention defined in the appended claims.

Claims

A first ratio of red fluorescent protein;

A second proportion of green fluorescent protein; And

A biomaterial for an LED device comprising a third ratio of yellow fluorescent protein.
The method of claim 1,

A bio material for an LED device, further comprising egg white.
Mixing the red, green, and yellow fluorescent proteins to form a fluorescent protein mixture;

Stirring the fluorescent protein mixture and egg-white to form a stirred solution; And

The method of manufacturing a bio-material for an LED device comprising the step of adding a surfactant to the stirring to generate and collect the precipitate.
The method of claim 3,

Drying the precipitate to produce a powder; And

The method of manufacturing a bio-material for an LED device further comprising the step of mixing the powder with a resin.
A light emitting diode emitting blue light; And

A white LED device comprising the biomaterial for an LED device according to any one of claims 1 to 3, provided on the light emitting diode.
The method of claim 5,

Comprising polyethylene formed on the light emitting diode,

The biomaterial for the LED device is a white LED device formed on the polyethylene.
The method of claim 5,

It includes a lens provided on the light emitting diode,

The LED material biomaterial is a white LED device formed on the inner surface of the lens.