TWM627000U - Full-spectrum LED light-emitting device and lighting fixture thereof - Google Patents

Abstract

The present invention proposes a full-spectrum LED lighting device and a lighting fixture thereof. The full-spectrum LED lighting device includes a base, at least two LED chips, and a light excitation structure. The LED chip is arranged on the base and the wavelength of the light emitted by it is 400-415nm. The light excitation structure corresponds to the LED chip arranged on the base and covered outside the LED chip. The light excitation structure includes a first phosphor powder and a second phosphor powder. , the third phosphor and the fourth phosphor. The first to fourth phosphors are excited by the light of the LED chip, wherein the emission peak wavelength of the first phosphor is 525±5nm, and the mass ratio is 20-25%; the emission peak of the second phosphor is The wavelength is 447±5nm, and the mass ratio is 65-72%; the emission peak wavelength of the third phosphor is 496±5nm, and the mass ratio is 2.5-3.5%; the emission peak wavelength of the fourth phosphor is 648±5nm, the mass ratio is 4-7%; the color rendering index R9>93 and R15>95 of the light emitted by the first to fourth phosphors after being excited by the LED chip. In this way, through the above technical features, a product with excellent luminous efficacy under a new generation of indicators can be provided, which greatly improves the real color rendering performance that can be achieved by the light-emitting device, and makes the objects seen are closer to the natural primary color.

Description

Full-spectrum LED light-emitting device and its lighting fixture

This creation is related to the field of light-emitting lighting devices, especially a full-spectrum LED light-emitting device and its lighting fixture with high color rendering properties to improve the color reproduction degree of the illuminated object.

With the progress and development of the industry, LEDs (Light Emitting Diodes) have been widely used in various devices and articles requiring light sources. For the LED light source, there are also quite a lot of norms and related evaluation indicators in the world, in order to distinguish and express the luminous effect of various LED light sources and the lighting devices made of them. Among various indicators, the Color Rendering Index (CRI) is a measure used to represent the ability of a light source to present the color of a real object. The color rendering index ranges from 0 to 100. The larger the value, the higher the color rendering, that is, the higher the color reproduction of the light source to the illuminated object, and the closer the light source is to the ideal light source or natural light.

CRI is defined as determining how accurately a light source makes each of these colors appear for a set of 15 predefined colors. The common CRI index today is mostly obtained by adding and averaging eight colors. It is generally called Ra (General Color Rendering Index). The eight color levels are R1~R8 values in the optical code. The order is dark gray-red, dark yellow, saturated yellow-green, medium yellow-green, light blue-green, light blue, light purple-blue and light red-purple. Since these color scales do not include brighter colors such as saturated red and saturated yellow into the color rendering, the presentation of color saturation must be further defined by R9-R15.

In the R9-R15 color scale, R9 is a numerical value representing the accuracy of the light source to reproduce strong red, and R9 is actually a very important color reproduction index. The ability of a light source to render saturated reds is critical for many lighting applications, especially with regard to the reproduction of human skin tones. When the light source lacks the color rendering ability of saturated red, the human skin will look pale or even close to green, so the performance of R9 is very important in areas where color performance is critical, such as medical applications or photography applications. Light source quality index. In Asia, another color scale that is closely related to human skin color is R15, which is the accuracy value of the light source to reproduce the skin color of yellow people. Therefore, when the performance of R15 is better, the above-mentioned applications will also be greatly improved. Color reproduction quality.

It can be seen from the above content that in addition to R1-R8, R9-R15 is also an important indicator of the color rendering capability of the light source, especially R9 and R15, which have a great impact on the color reproduction of lighting. However, the current lighting sources, especially LED light sources, are limited by their composition, and the R9 performance score for saturated red is quite poor. And because the current CRI index does not include R9-R15, although these light sources have excellent performance in the R1-R8 color scale, that is, the CRI value is quite high, but in fact there is still a great improvement in color saturation. space.

In view of this, the creator has gathered rich experience in related industries, and conceived and proposed a full-spectrum LED light-emitting device and its lighting fixture to break through the predicament of LED light source in color rendering index and greatly improve the lighting quality of LED light source. .

One of the objectives of this creation is to provide a full-spectrum LED light-emitting device and its lighting fixture, which break through the limitations of LEDs and allow it to have excellent reproduction performance in saturated red and yellow skin colors, so as to improve the light-emitting device. The high color reproduction capability enables light-emitting devices to provide higher color quality in applications.

In order to achieve the above-mentioned purpose, a full-spectrum LED lighting device of the present invention includes: a base; at least two LED chips disposed on the base, and the wavelengths of light emitted by the LED chips are 400-415 nm; and a light The excitation structure is arranged on the base corresponding to the LED chips and covers the LED chips, and includes: a first phosphor powder for being excited by the light of the LED chips, wherein the first phosphor powder is The peak wavelength of the emitted light is 525±5nm, and the mass ratio of the first phosphor powder is 20-25%; a second phosphor powder is used to be excited by the light of the LED chips, wherein the second phosphor powder The peak wavelength of the emitted light is 447±5nm, and the mass ratio of the second phosphor is 65-72%; a third phosphor is used to be excited by the light of the LED chips, wherein the third phosphor The emission peak wavelength of the powder is 496±5nm, and the mass ratio of the third phosphor is 2.5-3.5%; and a fourth phosphor is used for excitation by the light of the LED chips, wherein the fourth phosphor The emission peak wavelength of the phosphor powder is 648±5nm, and the mass ratio of the fourth phosphor powder is 4-7%; wherein, the first phosphor powder, the second phosphor powder, the third phosphor powder After the light powder and the fourth phosphor are excited by the LED chips, the mixed light emitted has a color rendering index of R9>93 and R15>95. Under the above structure, the full-spectrum LED light-emitting device has high R9 and R15 indices that cannot be achieved by conventional LEDs, so as to provide a luminous effect closer to natural white light, and can produce excellent color reproduction in various applications.

Preferably, the light-excited structure further comprises an encapsulant, and the encapsulant is mixed with the first phosphor, the second phosphor, the third phosphor and the fourth phosphor for encapsulation In these LED chips, the mass ratio of the encapsulant is 1-1.2%. In this way, the effect of protecting the phosphor powder and LED chip can be achieved, and the light output effect can be ensured at the same time.

Preferably, the material of the base is epoxy resin, the top surface and bottom surface of the base are square, the top surface of the base is concavely formed to form an encapsulation groove, and the LED chips and the light excitation structure are arranged in the package groove.

Preferably, the first phosphor is aluminate, and its particle size _D50 is 17±1 μm; the second phosphor is strontium europium chlorophosphate, and its particle size _D50 is 8.5±1 μm; the The third phosphor is oxynitride, and its particle size _D50 is 20±2 μm; the fourth phosphor is nitride, and its particle size _D50 is 17±1 μm.

Preferably, the size of the LED chips is (254±38) x (762±38) x (150±15) μm or (533±25) x (864±25) x (150±15) μm.

The present invention also proposes a lighting fixture, comprising: a body having an accommodating space; and at least one full-spectrum LED lighting device as described in the previous embodiments, disposed in the accommodating space to provide light. Through the full-spectrum LED light-emitting device, the color quality of the lighting fixture can be greatly improved, so as to provide a more realistic color reproduction performance in many applications.

Preferably, the lighting fixture further comprises a base and a support rod, one end of the support rod is connected with the body, and the other end is connected with the base, so that the body can be placed on a desktop for use, and can be used as, for example, a desk lamp. or eye protection lamps, etc.

To sum up, the full-spectrum LED light-emitting device of this creation overcomes the insufficient color reproduction ability of traditional LEDs in terms of saturated red and yellow skin tones due to their limited composition. In addition to having excellent CRI (R1-R8), In particular, it has excellent performance in R9 and R15 indicators, and then provides a light output effect close to real natural light, so as to provide high color quality lighting products for lighting needs such as stage, medical treatment, and photography. Further, based on the requirements of manufacturing, production or light-emitting performance, this creation also proposes additional technical features, as shown in the above paragraphs.

In order to enable those with ordinary knowledge in the art to clearly understand the content of this creation, the following descriptions are combined with the drawings, please refer to.

Traditional LEDs use blue light to excite phosphors, and then mix to form white light with different color temperatures. Because blue light is used as the excitation light source, most of them are insufficient in the rendering of red, and even the color reproduction value of saturated red is negative. value, this will cause the lighting to appear mostly pale and distorted, and the same is true for the R15 indicator. Therefore, based on the cognition in the relevant industry fields and the understanding of the existing products, the creator conceived the use of a special light excitation structure and a non-blue light chip to greatly improve the color rendering of LEDs. The energy of white light is almost equal to that of natural light, thereby enhancing the lighting efficiency of the LED lighting device. The following describes a full-spectrum LED light-emitting device proposed by the present invention.

Please refer to FIGS. 1 to 2, which are schematic structural diagrams and cross-sectional diagrams of a full-spectrum LED lighting device according to a preferred embodiment of the present invention. The full-spectrum LED lighting device 1 includes a base 10 , at least two LED chips 11 and a light excitation structure 12 . The base 10 can be a flat plate or a structure with grooves for carrying the LED chips 11 and the light excitation structure 12 . The LED chips 11 are disposed on the base 10 , and the wavelengths of the light emitted by the LED chips 11 are 400-415 nm. The light excitation structure 12 is disposed on the base 10 corresponding to the LED chips 11 and covers the LED chips 11. The light excitation structure 12 includes a first phosphor 121, a second phosphor 122, A third phosphor 123 and a fourth phosphor 124 .

The first phosphor 121 is excited by light from the LED chips 11 , wherein the emission peak wavelength of the first phosphor 121 is 525±5 nm, and the mass ratio of the first phosphor 121 is 20 ~25%. The second phosphor 122 is excited by the light of the LED chips 11 , wherein the emission peak wavelength of the second phosphor 122 is 447±5 nm, and the mass ratio of the second phosphor 122 is 65% ~72%. The third phosphor 123 is excited by the light of the LED chips 11 , wherein the emission peak wavelength of the third phosphor 123 is 496±5 nm, and the mass ratio of the third phosphor 123 is 2.5 ~3.5%. The fourth phosphor 124 is excited by the light of the LED chips 11 , wherein the emission peak wavelength of the fourth phosphor 124 is 648±5 nm, and the mass ratio of the fourth phosphor 124 is 4 ~7%. Among them, the color rendering index of the mixed light emitted by the first phosphor 121 , the second phosphor 122 , the third phosphor 123 and the fourth phosphor 124 after being excited by the LED chips 11 has a color rendering index. R9>93, R15>95. Through the technical features of the light excitation structure 12 and the matching two LED chips 11, the full spectrum LED light-emitting device 1 made therefrom has a light-emitting effect that is very close to natural light, which greatly improves the existing LEDs due to their structure, which cannot be achieved. The dilemma of full-spectrum light. The light emitted from the full-spectrum LED light-emitting device 1 has a certain intensity in each wavelength band, which can eliminate the problem of insufficient light intensity in some wavelengths caused by the inherent excitation light color of the LED in the past. On the other hand, in the color rendering index, the full-spectrum LED light-emitting device 1 has excellent performance of saturated red and yellow skin color reproduction, so that the lighting effect is more realistic and the color is more saturated, which improves the performance in the past. The red light and the often overlooked lack of color in the skin color of the yellow race.

The full-spectrum LED light-emitting device 1 uses the LED chips 11 with wavelengths of 400-415 nm instead of conventional blue light, and the light excitation structure 12 includes the first phosphor 121 and the second phosphor 122. The third phosphor 123 and the fourth phosphor 124, so as to achieve full spectrum light emission and high R9 and R15 numerical performance accordingly.

Preferably, the light excitation structure 12 further includes a sealant 125, the sealant 125 is connected with the first phosphor 121, the second phosphor 122, the third phosphor 123 and the fourth phosphor. The phosphors 124 are mixed with each other to encapsulate the LED chips 11 , wherein the mass ratio of the encapsulant 125 is 1-1.2%. Through the encapsulant 125, the protection performance of the full-spectrum LED light-emitting device 1 can be improved, the reliability of the product can be effectively improved, and external moisture can be prevented from affecting the phosphor or the LED chip. In order to ensure the luminous efficacy of the full-spectrum LED light-emitting device 1, it is further disclosed in this embodiment that the mass ratio of the encapsulant 125 is 1-1.2%, so as to prevent the encapsulant from affecting the overall light excitation effect and the light output brightness state. , and the material of the sealant 125 can be Epoxy or silicone. Taking the aforementioned conditions into consideration, in a preferred implementation example, the mass ratio of the first phosphor 121 can be about 23%, the mass ratio of the second phosphor 122 is about 68%, and the third phosphor 122 can have a mass ratio of about 68%. The mass ratio of the phosphor 123 is about 2.6%, the mass ratio of the fourth phosphor 124 is about 4.8%, and the mass ratio of the sealant 125 is about 1.1%.

In this embodiment, the top surface and bottom surface of the base 10 are square, and the top surface of the base 10 is recessed to form a package groove 101 as an example, and the material of the base 10 can be epoxy resin. The resin (Expoy) can better prevent the base 10 from being damaged by the light emitted by the LED chips 11 . The LED chips 11 and the light-excited structure 12 are disposed in the package groove 101 to form a structure as shown in the figure.

Regarding further features of the first phosphor 121 , the second phosphor 122 , the third phosphor 123 and the fourth phosphor 124 , for example, the first phosphor 121 can be selected from aluminate salt, and its particle size _D50 is 17±1 μm. Alternatively, the second phosphor 122 is made of strontium europium chlorophosphate, and its particle size D ₅₀ is 8.5±1 μm. Or the third phosphor 123 is made of oxynitride, and its particle size _D50 is 20±2 μm; or the fourth phosphor 124 is made of nitride, and its particle size _D50 is 17±1 μm. Of course, in addition to individual selections, in one embodiment, the first phosphor 121 , the second phosphor 122 , the third phosphor 123 and the fourth phosphor 124 can meet the above-mentioned requirements at the same time. Material and particle size conditions, and can achieve better luminous effect. The dimensions of the LED chips 11 are preferably (254±38) x (762±38) x (150±15) μm or (533±25) x (864±25) x (150±15) μm.

The following are the ratios of the first phosphor 121 , the second phosphor 122 , the third phosphor 123 and the fourth phosphor 124 for the full-spectrum LED lighting device 1 are 20-25 respectively %, 65-72%, 2.5-3.5% and 4-7%, the results obtained after multiple tests. It should be noted that in practice, there may be a slight difference in the results of each photoelectric test due to the process execution, the precipitation, mixing, and distribution of the phosphor powder, and the state of mixing with the encapsulant 125. However, in the full-spectrum LED lighting device 1 of this case, when the ratio of the first phosphor 121 , the second phosphor 122 , the third phosphor 123 and the fourth phosphor 124 meets the above conditions, The performances of R9>93 and R15>95 can be achieved. The following series shows the test results of the full-spectrum LED light-emitting device 1 made under the above ratio conditions. Please refer to the content below.

Please refer to FIG. 3 , which is a first set of test spectrum graphs of the full-spectrum LED lighting device according to the preferred embodiment of the present invention. The first set of test data of the full-spectrum LED light-emitting device 1 is detailed as follows, the color temperature CCT is 5115K, the dominant wavelength is 566.4nm, the color rendering index Ra is 99.0, and the values of R1 to R15 are shown in Table 1 below, where R9 is 93.97, R15 is 98.05. Further, the color gamut index Rg of the full-spectrum LED lighting device 1 is 99.4, and the average color fidelity index Rf is 97.7. R1 99.59 R9 93.97 R2 99.36 R10 98.77 R3 99.15 R11 97.36 R4 98.99 R12 98.92 R5 99.29 R13 99.28 R6 98.85 R14 99.46 R7 98.98 R15 98.05 R8 97.76 Table I

Please refer to FIG. 4 , which is a second set of test spectrum graphs of the full-spectrum LED lighting device according to the preferred embodiment of the present invention. The second set of test data of the full-spectrum LED light-emitting device 1 is detailed as follows, the color temperature CCT is 5001K, the dominant wavelength is 568.6nm, the color rendering index Ra is 98.8, and the values of R1-R15 are shown in Table 2 below, wherein R9 is 96.42, R15 is 98.93. Further, the color gamut index Rg of the full-spectrum LED lighting device 1 is 99.6, and the average color fidelity index Rf is 97.5. R1 99.47 R9 96.42 R2 99.31 R10 97.75 R3 98.87 R11 96.67 R4 98.47 R12 98.41 R5 98.84 R13 99.26 R6 98.04 R14 99.29 R7 98.73 R15 98.93 R8 98.34 Table II

Please refer to FIG. 5 , which is a third set of test spectrum graphs of the full-spectrum LED lighting device according to the preferred embodiment of the present invention. The third set of test data of the full-spectrum LED light-emitting device 1 is detailed as follows, the color temperature CCT is 5327K, the dominant wavelength is 560.8nm, the color rendering index Ra is 99.0, and the values of R1 to R15 are shown in Table 3 below, wherein R9 is 94.38, R15 was 98.17. Further, the color gamut index Rg of the full-spectrum LED lighting device 1 is 99.4, and the average color fidelity index Rf is 97.7. R1 99.63 R9 94.38 R2 99.35 R10 98.57 R3 99.05 R11 97.33 R4 98.95 R12 99.03 R5 99.20 R13 99.28 R6 98.71 R14 99.42 R7 98.99 R15 98.17 R8 97.91 Table 3

Please refer to FIG. 6 , which is a fourth set of test spectrum graphs of the full-spectrum LED lighting device according to the preferred embodiment of the present invention. The fourth set of test data of the full-spectrum LED light-emitting device 1 is detailed as follows, the color temperature CCT is 5430K, the dominant wavelength is 556.9nm, the color rendering index Ra is 98.7, and the values of R1 to R15 are shown in Table 4 below, wherein R9 is 98.74, R15 is 99.13. Further, the color gamut index Rg of the full-spectrum LED lighting device 1 is 100.7, and the average color fidelity index Rf is 98.3. R1 98.40 R9 98.74 R2 99.31 R10 97.88 R3 99.19 R11 95.39 R4 97.11 R12 98.43 R5 97.88 R13 98.64 R6 98.00 R14 99.27 R7 99.78 R15 99.13 R8 99.57 Table 4

Please refer to FIG. 7 , which is a fifth set of test spectrum graphs of the full-spectrum LED lighting device according to the preferred embodiment of the present invention. The fifth set of test data of the full-spectrum LED light-emitting device 1 is detailed as follows, the color temperature CCT is 5075K, the dominant wavelength is 567.3nm, the color rendering index Ra is 98.9, and the values of R1 to R15 are shown in Table 5 below, wherein R9 is 96.06, R15 is 98.78. Further, the color gamut index Rg of the full-spectrum LED lighting device 1 is 99.6, and the average color fidelity index Rf is 97.7. R1 99.65 R9 96.06 R2 99.42 R10 98.18 R3 99.01 R11 96.81 R4 98.57 R12 98.74 R5 98.98 R13 99.37 R6 98.34 R14 99.36 R7 98.92 R15 98.78 R8 98.37 Table 5

The aforementioned sets of data are the test results for the full-spectrum LED lighting device 1 belonging to the white light classification ANSI 5000K. For the full-spectrum LED lighting device 1 under the white light classification ANSI other color temperatures, relevant tests are also carried out in this work. The sixth set of test data of the full-spectrum LED light-emitting device 1 is detailed as follows, the color temperature CCT is 3042K (white light classification ANSI 3000K), the dominant wavelength is 583.3nm, the color rendering index Ra is 97.9, and the values of R1 to R15 are shown in Table 6 below. where R9 is 94 and R15 is 99. R1 98 R9 94 R2 99 R10 99 R3 97 R11 95 R4 97 R12 97 R5 98 R13 99 R6 98 R14 97 R7 98 R15 99 R8 98 Table 6

The seventh set of test data of the full-spectrum LED light-emitting device 1 is detailed as follows, its color temperature CCT is 2809K (white light classification ANSI 2700K), the dominant wavelength is 584.0nm, the color rendering index Ra is 97.7, and the values of R1 to R15 are shown in Table 7 below. where R9 is 93 and R15 is 99. R1 98 R9 93 R2 99 R10 99 R3 97 R11 94 R4 96 R12 98 R5 98 R13 98 R6 97 R14 97 R7 98 R15 99 R8 97 Table 7

The eighth set of test data of the full-spectrum LED lighting device 1 is detailed as follows, its color temperature CCT is 4041K (white light classification ANSI 4000K), the dominant wavelength is 577.1nm, the color rendering index Ra is 97.5, and the values of R1 to R15 are shown in Table 8 below. where R9 is 97 and R15 is 98. R1 97 R9 97 R2 98 R10 97 R3 98 R11 93 R4 96 R12 94 R5 97 R13 97 R6 98 R14 98 R7 98 R15 98 R8 98 Table 8

It can be seen from the above-mentioned sets of test data that the full-spectrum LED light-emitting device 1 made by the technical solution proposed in this creation has indeed excellent color rendering effect, wherein R9 and R15 in the color rendering index are also respectively With a fairly high value, it can have excellent color saturation performance in lighting, and provide lighting close to natural light.

Please continue to refer to FIGS. 8 and 9 , which are a schematic structural diagram of a lighting fixture according to a preferred embodiment of the present invention and a structural schematic diagram of another embodiment. The present invention also provides a lighting fixture 2 , which includes a body 20 and at least one full-spectrum LED lighting device 1 as described above. The main body 20 has an accommodating space 201, and the full-spectrum light-emitting device 1 is disposed in the accommodating space 201 to provide light, wherein the full-spectrum light-emitting device 1 is as described in the previous paragraphs, including the base 10 , the LED chips 11 and the light excitation structure 12, and the LED chips 11 are arranged on the base 10 and have a light emission wavelength of 400-415 nm, and the light excitation structure 12 is also arranged on the base 10 and covers the base 10. LED chip 11, including the first phosphor 121, the second phosphor 122, the third phosphor 123 and the fourth phosphor 124, the first phosphor 121, the second phosphor The features of the phosphor 122 , the third phosphor 123 and the fourth phosphor 124 are as described above and will not be repeated here. Through the full-spectrum LED light-emitting device 1, the lighting fixture 2 can emit light that is very similar to natural light, which is beneficial to be used as plant lighting, indoor lighting, stage lights or desk lamps, eye protection lights, and lights for exhibition places. As shown in FIG. 4 , the lighting fixture 2 is a schematic structure of a bulb lamp. Of course, the lighting fixture 2 can also be a socket lamp, a flat panel lamp, or the like.

FIG. 9 shows a schematic diagram of the structure of the lighting fixture 2 for placing on the desktop. Here, the lighting fixture 2 further includes a base 21 and a support rod 22 , and one end of the support rod 22 is connected to the main body 20 . , the other end is connected with the base 21, so that the main body 20 can be used on the desktop, and can be used as an eye protection lamp or a desk lamp. With the excellent light-emitting effect of the lighting fixture 2, the color performance of the eyes can be greatly improved. Especially when used as a lighting device during shooting, it can improve the color saturation and contrast performance of photos or videos. For other information about the advantages of the full-spectrum LED lighting device 1 , various light output parameters that can be achieved, and technical features that can be further added, please refer to the foregoing paragraphs.

To sum up, the full-spectrum LED light-emitting device and its lighting fixture of the present creation overcome the insufficient color reproduction ability of traditional LEDs in terms of saturated red and yellow skin tones due to their limited composition. In addition to having excellent Ra (R1 -R8), especially in the R9 and R15 indicators, it has excellent performance, and then provides a lighting effect close to the real natural light, so as to provide high color quality lighting products for lighting needs such as stage, medical treatment, photography, etc. Further, based on the requirements of manufacturing and light-emitting performance, the present invention also proposes the detailed conditions of the first to fourth phosphors, or the material and shape constraints of the base, so as to facilitate the improvement of the full-spectrum LED light-emitting device. application performance.

However, the above descriptions are only the preferred embodiments of this creation, and are not intended to limit the scope of implementation of this creation; therefore, equal changes and modifications made without departing from the scope of this creation shall be included in this creation. within the scope of the patent.

1: Full spectrum LED light-emitting device 10: Pedestal 101: Package slot 11: LED chip 12: Photoexcited Structures 121: The first phosphor 122: The second phosphor 123: The third phosphor 124: Fourth phosphor 125: Sealant 2: Lighting fixtures 20: Ontology 201: accommodating space 21: Base 22: strut

FIG. 1 is a schematic structural diagram of a full-spectrum LED light-emitting device according to a preferred embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of a full-spectrum LED light-emitting device according to a preferred embodiment of the present invention. FIG. 3 is a first set of test spectrum graphs of the full-spectrum LED lighting device according to the preferred embodiment of the present invention. FIG. 4 is a second set of test spectrum curves of the full-spectrum LED lighting device according to the preferred embodiment of the present invention. FIG. 5 is a third set of test spectrum graphs of the full-spectrum LED lighting device according to the preferred embodiment of the present invention. FIG. 6 is a fourth set of test spectrum curves of the full-spectrum LED lighting device according to the preferred embodiment of the present invention. FIG. 7 is a fifth set of test spectrum graphs of the full-spectrum LED lighting device according to the preferred embodiment of the present invention. FIG. 8 is a schematic structural diagram of a lighting fixture according to a preferred embodiment of the present invention. FIG. 9 is a schematic structural diagram of another implementation of the lighting fixture according to the preferred embodiment of the present invention.

1: Full spectrum LED light-emitting device

10: Pedestal

101: Package slot

11: LED chip

121: The first phosphor

122: The second phosphor

123: The third phosphor

124: Fourth phosphor

125: Sealant

Claims (10)

A full-spectrum LED light-emitting device, comprising: a base; At least two LED chips are arranged on the base, and the wavelengths of light emitted by the LED chips are 400-415 nm; and A light excitation structure, disposed on the base corresponding to the LED chips, and covering the LED chips, includes: A first phosphor for excitation by light from the LED chips, wherein the emission peak wavelength of the first phosphor is 525±5nm, and the mass ratio of the first phosphor is 20-25% ; A second phosphor for excitation by light from the LED chips, wherein the emission peak wavelength of the second phosphor is 447±5nm, and the mass ratio of the second phosphor is 65-72% ; A third phosphor for excitation by light from the LED chips, wherein the emission peak wavelength of the third phosphor is 496±5nm, and the mass ratio of the third phosphor is 2.5-3.5% ;and A fourth phosphor for excitation by light from the LED chips, wherein the emission peak wavelength of the fourth phosphor is 648±5nm, and the mass ratio of the fourth phosphor is 4-7% ; Among them, the color rendering index R9>93, R15 of the light emitted after the first phosphor, the second phosphor, the third phosphor and the fourth phosphor are excited by the LED chips >95. The full-spectrum LED light-emitting device of claim 1, wherein the light excitation structure further comprises an encapsulant, and the encapsulant is connected to the first phosphor, the second phosphor, and the third phosphor and the fourth phosphors are mixed with each other to encapsulate the LED chips, wherein the mass ratio of the encapsulant is 1-1.2%. The full-spectrum LED lighting device according to claim 2, wherein the material of the base is epoxy resin, the top surface and the bottom surface of the base are square, and the top surface of the base is concavely formed to form an encapsulation groove, The LED chips and the light excitation structure are disposed in the package groove. The full-spectrum LED light-emitting device according to claim 2, wherein the first phosphor is aluminate, and the particle size _D50 thereof is 17±1 μm. The full-spectrum LED light-emitting device according to claim 2, wherein the second phosphor is strontium europium chlorophosphate, and its particle size _D50 is 8.5±1 μm. The full-spectrum LED light-emitting device according to claim 2, wherein the third phosphor is oxynitride, and its particle size D ₅₀ is 20±2 μm. The full-spectrum LED light-emitting device according to claim 2, wherein the fourth phosphor powder is a nitride, and the particle size D ₅₀ thereof is 17±1 μm. The full-spectrum LED lighting device of claim 2, wherein the size of the LED chips is (254±38) x (762±38) x (150±15) μm or (533±25) x (864± 25) x (150±15) μm. A lighting fixture, comprising: a body with an accommodating space; and At least the full-spectrum LED lighting device according to any one of claims 1 to 8 is provided in the accommodating space to provide light. The lighting fixture as claimed in claim 9 further comprises a base and a support rod, one end of the support rod is connected with the body, and the other end is connected with the base, so that the body can be placed on a desktop for use.

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