KR200421146Y1 - Luminous device - Google Patents

Abstract

The present invention is a kind of light emitting device and includes the following.

One device includes three or more light emitting sources and phosphors, three of which consist of light emitting diodes (LEDs) of different light wavelengths below. By utilizing the property that two light sources stimulate the phosphor, it is possible to realize a light wavelength having two different light sources. These different wavelengths of light in turn form mixed light with the light of two light sources and the light of another independent light source, creating white light with a high color rendering index (CRI).

Light emitting device, light source, light emitting diode, phosphor, white light

Description

Light Emitting Device {LUMINOUS DEVICE}

1 is an explanatory diagram in which three light emitting diodes and one phosphor are combined in one device in the present invention;

Figure 2 is an explanatory view of the combination of three light emitting diodes and two materials in one device in the present invention.

Figure 3 is an explanatory diagram in which all three light emitting diodes are sealed with phosphors in one device according to the present invention.

4 is an explanatory diagram in which three light emitting diodes and two phosphors are combined in one device in the present invention;

5 is a view illustrating a white light implementation flow of the present invention.

6 is a plan explanatory diagram of the device circuit board of the present invention.

7 is a white light spectrum graph of the present invention.

8 is a spectral graph of conventionally known natural solar white light.

9 is a spectral graph implemented when a known blue light source stimulates a fluorescent layer.

[Explanation of symbols on the main parts of the drawings]

10 ... device 20 ... first light emitting diode

30 ... second light emitting diode 40 ... third light emitting diode

50 ... phosphors 22, 32, 42 ... connectors

60 ... other light A ... first light source

B ... 2nd light source R ... 3rd light source

W ... white light S, S1, S2 ... curve

The present invention is a kind of light emitting device, in particular, a device consisting of three light emitting diodes and a phosphor. In a combined device, the phosphor absorbs and reacts with light from the first and second light sources to produce different light. This other light forms a mixed light with the red light of the third light source and the unstimulated blue light of the first and second light sources to realize white light.

As shown in the graph of FIG. 8, the light wavelength range of natural sunlight (ie, natural white light) is between 360 nm and 7.5 nm. In Taiwan Patent Publication No. 383508 Light Emitting Device and Implementation Device Patent for the manufacture of a white light emitting device closer to the natural sunlight (white light) wavelength, one blue light emitting diode was used as a blue light source. The point of outputting light having a wavelength different from that of blue light having a wavelength was used. Here, white light may be realized by mixing mixed light with blue light which has not yet reacted among other light and light output by the light source. However, when comparing the corresponding spectral curve S2 (see FIG. 9) and the natural white light (sunlight) curve of FIG. 8, the difference between these two curves is very large. The problem is that the relatively long wavelength of the phosphor stimulated by blue light The white light, which was mixed with blue light that had not yet reacted, had a poor CRI when compared to natural sunlight.

Accordingly, an object of the present invention is to provide a light emitting device capable of realizing white light close to natural sunlight.

The present invention for achieving the above object is a kind of light emitting device, which utilizes the fact that two light sources to stimulate the phosphor to implement the light wavelength of two different light sources. These different types of light wavelengths may form mixed light with partial light of two light sources and light of another independent light source to obtain white light having excellent color rendering index (CRI).

Hereinafter, in order to be described in detail so that those skilled in the art can easily implement the present invention, the most preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. . Other objects, features, and operational advantages, including the object, operation, and effect of the present invention, will become more apparent from the description of the preferred embodiment.

As shown in FIGS. 1 and 5, the light emitting diode 10 according to the present invention includes three light emitting sources and three phosphors having three or more light emitting sources composed of the following light emitting diodes (LEDs) having different wavelengths. Included, the light emitting diode (LED),

A first light source A formed by the first light emitting diode 20 capable of outputting blue light in the wavelength range of 360 nm to 480 nm;

A second light source 형성 formed by the second light emitting diode 30 capable of outputting light between blue and green in the wavelength range of 480 nm to 570 nm;

A third light source R formed by the third light emitting diode 40 capable of outputting red light in the wavelength range of 585 nm to 780 nm; And

It includes a phosphor 50 encapsulated around the first LED (20)

The phosphor 50 absorbs light having different wavelengths output from the first and second light sources A and V, thereby implementing another light 60 having one wavelength different from the first and second light sources A and V wavelengths.

The other light 60 has a wavelength between 500 nm and 585 nm and the other light 60 is mixed with the red light output from the third light source R and the light output from the first, second light sources A and Ｂ and the mixed light. The mixed light may implement white light W.

The phosphor 50 is selected from the following materials.

(a) Si m O ^4- n; and

(b) BxOy ^3-

According to the above-described feature, the phosphor 50 is encapsulated around the first LED 20 and the third LED 40.

According to the above-described feature, the phosphor 50 is encapsulated around the first LED 20, the second LED 30, and the third LED 40.

According to the above feature, the device 10 is a circuit board 80, PCB, which is soldered such that the electrical connectors of the first, second and third light sources A, B, and R form an electrical loop.

EXAMPLE

As shown in Figures 1 and 6, the device 10 includes a circuit board or other module-substrate substrate in which the first light emitting diode 20, the second light emitting diode 30 and the third light emitting diode 40 are electrically connected. Connectors 22, 32 and 42 are welded to device 10, respectively, to form an electrical circuit. At this time, the third light emitting diode 40 is installed between the first and second light emitting diodes 20 and 30. Phosphor 50 is made by mixing evenly the transparent adhesive material and the powder of the fluorescent material, which is sealed on the first light emitting diode 20 to flow a current through the first light emitting diode 20 to generate blue light in the wavelength range of 360 ~ 480nm. The first light source A may be implemented. When the second light emitting diode 30 is stimulated with a current, light in the wavelength range of 480 nm to 570 nm can be realized. The naked eye is defined as a light source between blue and green and is referred to as a second light source. When the third light emitting diode 40 is stimulated with a current, a red light source in the wavelength range of 585 to 780 nm can be obtained, which is referred to as the third light source R (see FIG. 5). At this time, the phosphor 50 receives the blue first light source A and transmits the first light source A from the inside of the phosphor 50 to the outside, so that the first light source A is absorbed by the phosphor 50 and the second light source 청색 is blue. Outputs light between-green. Since the light of the portion is transmitted to the outer surface of the phosphor 50, the first and second light sources A and VII act on the phosphor 50 at the same time. The phosphor 50 simultaneously absorbs the light wavelengths of the first, second light sources A and VII, and outputs "other light 60" in the wavelength range of 500 to 585 nm. The other light 60, the first light source A, the second light source # and the third light source R may be mixed with each other to realize a white light W having excellent CRI.

As shown in FIG. 2, another possible example of the present invention is that the first light emitting diode 20 and the third light emitting diode 40 are simultaneously covered with the phosphor 50 at the left and right sides of the two combinations, thereby providing the apparatus 10. The center of the device 10 is connected to one second light emitting diode 30 by having one phosphor 50 on each of the left and right sides.

At this time, the third light source R is a red light having a wavelength range between 585 and 780 nm, and is generally (theoretically) not absorbed by the phosphor 50 and thus cannot stimulate the phosphor 50. Therefore, the two first light emitting diodes 20 are transmitted from the inside of the phosphor to the outside on both the left and right sides to realize blue light in the wavelength range of 360 to 480 nm, and output “other light 60” having different wavelengths. At the same time, the third light source R (red light) is transmitted from the inside of the phosphor 50 to the outside to cause the second light emitting diode 30 to output the second light source 사이 (color between blue and green) in the wavelength range of 480 to 570 nm. Let's do it. Thus, the first, second, third light sources A, X, R and other lights 60 are defined as white light W when viewed visually by mixing light with each other on the device 10. These three independent first, second, and third light sources A, X, R, and other kinds of wavelengths 60 may be mixed with each other to realize a white light W having excellent CRI.

When comparing the curve S obtained in the graph measured through the experiment of the white light W implemented in the present invention (FIG. 7) with the solar curve S1 of FIG. You can get CRI (Color rendering index).

FIG. 3 illustrates another possible implementation of the present invention by covering the phosphors 50 on the first, second, and third light emitting diodes 20, 30, and 40 to stimulate the first, second light sources A and Vga. To output `` other light 60 ''. The wavelengths of the other light 60 and the four light wavelengths such as the first, second light sources A, partial light wavelengths of the light source, and the light wavelengths of the third light source R may be mixed with each other and implemented as white light W on the device 10.

4 shows another possible implementation of the present invention, in which the first and second light emitting diodes 20 and 30 and the third light emitting diode 40 are welded to the center of the device 10, respectively, on the left and right sides of the middle of the device 10. Thus, the two phosphors 50 cover the first and second light emitting diodes 20 and 30, respectively. In the same principle, when the first, second, and third light emitting diodes 20, 30, and 40 output the first, second, and third light sources A, X, and R, the two phosphors 50 emit "other light 60". Will print. This "other light 60" and the light wavelength of the 1st, 2nd, 3rd light sources A, X, and R are mutually mixed, and it is defined as the white light W which is excellent in CRI by the naked eye.

The phosphor 50 according to the present invention is made of (a) Si m O ^4- n or (b) BxOy ^3- .

For reference, the embodiments disclosed herein are only presented by selecting the most preferred embodiment in order to help those skilled in the art from the various possible examples, the technical spirit of the present invention is not necessarily limited or limited only by this embodiment In addition, various changes, additions and changes are possible within the scope not departing from the technical idea of the present invention, as well as other embodiments of the equally clear.

As described above, the light emitting device according to the present invention can obtain white light close to natural sunlight having excellent color rendering index (CRI) due to the above-described technical configuration.

Claims (4)

In the light-emitting device comprising three light emitting sources and three phosphors having three or more light emitting sources composed of light emitting diodes (LEDs) having different wavelengths, The light emitting diode, A first light source A formed by the first light emitting diode 20 capable of outputting blue light in the wavelength range of 360 nm to 480 nm; A second light source 형성 formed by the second light emitting diode 30 capable of outputting light between blue and green in the wavelength range of 480 nm to 570 nm; A third light source R formed by the third light emitting diode 40 capable of outputting red light in the wavelength range of 585 nm to 780 nm; And It includes a phosphor 50 encapsulated around the first LED (20) The phosphor 50 absorbs light having different wavelengths output from the first and second light sources A and V, thereby implementing another light 60 having one wavelength different from the first and second light sources A and V wavelengths. The other light 60 has a wavelength between 500 nm and 585 nm and the other light 60 is mixed with the red light output from the third light source R and the light output from the first, second light sources A and Ｂ and the mixed light. Mixed light implements white light W, The phosphor (50) is selected from (a) Si m O ^4- n; and (b) BxOy ^3- . The method of claim 1, The phosphor is encapsulated around the first LED (20) and the third LED (40). The method of claim 1, The phosphor is encapsulated around the first LED (20), the second LED (30) and the third LED (40). The method of claim 1, The device (10) is a light emitting device, characterized in that the electrical connectors of the first, second and third light sources (A, B, R) are circuit boards (80, PCB) soldered to form an electrical loop.

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