CN219696478U - Full spectrum LED device and LED equipment - Google Patents

Abstract

The utility model relates to a full spectrum LED device and LED equipment, which are characterized in that at least three LED chip units with peak wavelengths within 415-470 nm are arranged, each LED chip unit is electrically connected, the quantity of LED chips included by each LED chip unit is the same, and the peak wavelengths of the at least three LED chip units are different, so that the distribution of balanced blue light energy is realized; through the spectrum coupling between the at least three LED chip units and the fluorescent powder in the fluorescent glue, the blue light peak value of the full-spectrum LED device in the spectrum can be reduced, the spectrum continuity of the full-spectrum LED device is improved, the similarity between the full-spectrum LED device and natural light is improved, the full-spectrum LED device is enabled to be more approximate to the natural light to the greatest extent, and a better color effect is obtained.

Description

Full spectrum LED device and LED equipment

Technical Field

The utility model relates to the field of light-emitting diodes (LEDs), in particular to a full-spectrum LED device and LED equipment.

Background

The 15 standard color samples are internationally specified for calculating the color rendering indices R1 to R15 of the light source, the 15 color rendering indices R1 to R15 of the standard light source are all 100, and the average value of R1 to R8 is generally defined as a general color rendering index (Ra), but the other color rendering indices R9 to R15 are also very important for evaluating the reducibility of the corresponding colors. Light sources having a general color rendering index Ra of greater than 95 and R1 to R15 of greater than 90 are known in the industry as full spectrum light sources. The current full spectrum LED light source pursues the parameters of the display finger Ra and R9, and neglects the spectrum continuity and the similarity with the natural light spectrum. The existing full-spectrum LED light source has poor spectrum continuity, higher blue light peak value and poor similarity with natural light.

Disclosure of Invention

In view of the shortcomings of the related art, the utility model aims to provide a full-spectrum LED device and an LED apparatus, and aims to solve the problems of poor spectrum continuity, high blue light peak value and poor similarity with natural light of the existing full-spectrum LED device.

In order to solve the technical problems, the utility model provides a full spectrum LED device, which comprises an LED chip with the peak wavelength of 415nm to 470nm and fluorescent glue mixed with fluorescent powder; the LED chips comprise at least three LED chip units with peak wavelengths within 415nm to 470nm, the quantity of the LED chips contained in each LED chip unit is the same, the LED chip units are electrically connected, and the peak wavelength ranges of the LED chip units are different; and the fluorescent glue covers each LED chip unit.

In some embodiments of the present utility model, the LED chip includes a first LED chip unit having a peak wavelength of 430nm to 440nm, a second LED chip unit having a peak wavelength of 445nm to 455nm, and a third LED chip unit having a peak wavelength of 455nm to 465nm.

In some embodiments of the utility model, the half-wave width of the second and third LED chip units is 10nm to 20nm, and the half-wave width of the first LED chip unit is 15nm to 25nm.

In some embodiments of the utility model, the size of the LED chips in the third LED chip unit is smaller than the sizes of the LED chips in the first LED chip unit and the second LED chip unit.

In some embodiments of the present utility model, the third LED chip unit is located between the first LED chip unit and the second LED chip unit, and the first LED chip unit, the third LED chip unit, and the second LED chip unit are sequentially disposed.

In some embodiments of the present utility model, the LED chip includes a fourth LED chip unit having a peak wavelength of 415nm to 425nm, a fifth LED chip unit having a peak wavelength of 430nm to 440nm, a sixth LED chip unit having a peak wavelength of 445nm to 455nm, and a seventh LED chip unit having a peak wavelength of 460nm to 470nm.

In some embodiments of the utility model, the half-wave widths of the fifth LED chip unit, the sixth LED chip unit, and the seventh LED chip unit are 10nm to 20nm, and the half-wave width of the fourth LED chip unit is 15nm to 25nm.

In some embodiments of the present utility model, each of the LED chip units is an LED chip; or, each LED chip unit includes at least two LED chips.

In some embodiments of the present utility model, the LED chips are arranged in rows and/or columns, or are alternately arranged, or are rotationally symmetrically arranged, or are arranged in a delta shape.

In some embodiments of the present utility model, the full spectrum LED device further includes a substrate, each of the LED chip units is disposed on a front surface of the substrate, and the fluorescent glue is disposed on the substrate to cover each of the LED chip units.

In some embodiments of the present utility model, the full spectrum LED device further includes a base, the base is provided with a receiving cavity, each of the LED chip units is disposed at a bottom of the receiving cavity, and at least a portion of the fluorescent glue is disposed in the receiving cavity to cover each of the LED chip units.

Based on the same inventive concept, the utility model also provides an LED device, which comprises a device main body and at least one full-spectrum LED device, wherein the full-spectrum LED device is arranged on the device main body.

Advantageous effects

The utility model provides a full spectrum LED device and LED equipment, which are characterized in that at least three LED chip units with peak wavelengths within 415-470 nm are arranged, each LED chip unit is electrically connected, the quantity of LED chips included by each LED chip unit is the same, and the peak wavelengths of the at least three LED chip units are different, so that the distribution of balanced blue light energy is realized; through the spectrum coupling between the at least three LED chip units and the fluorescent powder in the fluorescent glue, the blue light peak value of the full-spectrum LED device in the spectrum can be reduced, the spectrum continuity of the full-spectrum LED device is improved, the similarity between the full-spectrum LED device and natural light is improved, the full-spectrum LED device is enabled to be more approximate to the natural light to the greatest extent, and a better color effect is obtained.

Drawings

Fig. 1-1 is a schematic diagram of a full spectrum LED device according to an embodiment of the present utility model;

fig. 1-2 are a schematic diagram of a full spectrum LED device according to a second embodiment of the present utility model;

fig. 1-3 are a schematic diagram III of a full spectrum LED device according to an embodiment of the present utility model;

fig. 1-4 are schematic diagrams of a full spectrum LED device according to an embodiment of the present utility model;

fig. 2-1 is a schematic diagram of a full spectrum LED device according to an embodiment of the present utility model;

fig. 2-2 is a schematic diagram of a full spectrum LED device according to an embodiment of the present utility model;

fig. 2-3 are a schematic diagram seven of a full spectrum LED device according to an embodiment of the present utility model;

fig. 2-4 are schematic diagrams eight of a full spectrum LED device structure according to an embodiment of the present utility model;

FIG. 3-1 is a schematic spectrum of a conventional Ra90 light source according to an embodiment of the present utility model;

FIG. 3-2 is a schematic spectrum diagram of a conventional mainstream light source according to an embodiment of the present utility model;

fig. 4-1 is a schematic spectrum diagram of an LED chip after being assembled according to an embodiment of the present utility model;

fig. 4-2 is a schematic spectrum diagram of a full spectrum LED device provided by an embodiment of the present utility model at a color temperature of 5000K;

fig. 4-3 are schematic diagrams of Rf-Rg of the full spectrum LED device according to the embodiment of the present utility model;

FIGS. 4-4 are schematic diagrams of Rf hues provided by embodiments of the present utility model;

FIGS. 4-5 are color vector diagrams of an existing full spectrum LED device according to embodiments of the present utility model;

fig. 4-6 are color vector diagrams of a full spectrum LED device according to an embodiment of the present utility model;

fig. 4-7 are schematic diagrams of spectral contrast of a full spectrum LED device according to embodiments of the present utility model;

fig. 4-8 are schematic diagrams of spectra of a full spectrum LED device provided by an embodiment of the present utility model at a color temperature of 1700K;

fig. 4-9 are schematic diagrams of spectrums of a full spectrum LED device provided by an embodiment of the present utility model at a color temperature of 2700K;

fig. 4-10 are schematic diagrams of spectrums of a full spectrum LED device provided by an embodiment of the present utility model at a color temperature of 3000K;

fig. 4-11 are schematic diagrams of spectra of a full spectrum LED device provided by an embodiment of the present utility model at a color temperature of 4000K;

fig. 4-12 are schematic diagrams of spectra of a full spectrum LED device provided by an embodiment of the present utility model at a color temperature of 5700K;

fig. 4-13 are schematic diagrams of spectrums of a full spectrum LED device provided by an embodiment of the present utility model at a color temperature of 6500K;

fig. 4-14 are schematic diagrams of spectra of a full spectrum LED device provided by an embodiment of the present utility model at a color temperature of 1300K;

fig. 5 is a schematic diagram nine of a full spectrum LED device structure provided by an embodiment of the present utility model;

fig. 6-1 is a schematic diagram of a full spectrum LED device according to an embodiment of the present utility model;

fig. 6-2 is a schematic diagram eleven of a full spectrum LED device structure according to an embodiment of the present utility model.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

The full spectrum LED device provided by the embodiment has the advantages of good spectrum continuity, low blue light peak value, high similarity with natural light and the like, an adopted LED chip comprises at least three LED chip units, and the peak wavelength of the at least three LED chip units is 415nm to 470nm. The at least three LED chip units in the present embodiment are electrically connected, and a specific electrical connection manner may be series connection, parallel connection or a combination of series and parallel connection; and the peak wavelengths of the at least three LED chip units are set to be different from each other in 415nm to 470nm according to the principle of balancing the blue light energy distribution, so that the balancing of the blue light energy distribution is realized. It should be understood that, in the present embodiment, the peak wavelength ranges of the LED chip units of each group may be set to be non-overlapping, thereby ensuring the light emitting effect. Of course, in other examples, at least a part of the peak wavelength ranges of the LED chip units may be overlapped, so long as the above technical problem to be solved by the present embodiment can be basically solved. In some examples of this embodiment, the number of LED chips included in each group of LED chip units may be the same, so as to ensure uniformity of light emission of each group of LED chip units, and further improve the overall light emission effect of the full-spectrum LED device.

The full spectrum LED device in this embodiment further includes a fluorescent glue (also referred to as a packaging glue) covering each LED chip unit; the fluorescent glue comprises glue and fluorescent powder mixed in the glue, and the fluorescent powder in the embodiment is understood that the fluorescent powder in the embodiment can be any fluorescent powder combination which can reduce the blue light peak value of an LED device in a spectrum, improve the spectrum continuity of the LED device, improve the similarity of the LED device and natural light and enable the LED device to be more similar to the natural light through matching with the LED chip units. For example, in one example, the phosphor may include, but is not limited to, cyan, green, yellow, and red; in other examples, the phosphor may be composed of green, yellow, and red powders, where the required phosphor is of a few types and low cost, and the mixing ratio is simple. In this embodiment, the emission peak wavelength of the green powder selected is 490 nm-510 nm under blue light excitation, the emission peak wavelength of the green powder is 520 nm-540 nm under blue light excitation, the emission peak wavelength of the yellow powder is 570 nm-590 nm under blue light excitation, and the emission peak wavelength of the red powder is 650 nm-660 nm under blue light excitation. Of course, it should be understood that in some application examples, at least one of green powder, yellow powder, and red powder may be equivalently replaced with a corresponding QD (Quantum dot). Of course, in other examples of the present embodiment, the phosphor may include at least one of blue-green powder, yellow-green powder, pink powder, and deep red powder in addition to cyan powder, green powder, yellow powder, and red powder. Or at least one of the green powder, the yellow powder and the red powder contained in the fluorescent powder is replaced by other fluorescent powder with corresponding performance, and the description is omitted herein.

In the embodiment, through the spectrum coupling between the at least three LED chip units and the fluorescent powder in the fluorescent glue, the blue light peak value of the full-spectrum LED device in the spectrum can be reduced, the spectrum continuity of the full-spectrum LED device is improved, the similarity between the full-spectrum LED device and natural light is improved, the full-spectrum LED device is enabled to be more approximate to the natural light, and a better color effect is obtained.

The LED chips in this embodiment may be M i n i LED chips, M i cro LED chips, or common large-size LED chips, or may be one of M i n i LED chips, M i cro LED chips, and common large-size LED chips, and the other may be at least one of the remaining two; according to the electrode distribution distinction of the LED chips, the LED chips in the embodiment can be all forward-mounted LED chips, flip-chip LED chips or vertical LED chips, or one part of the forward-mounted LED chips, one of the flip-chip LED chips and the vertical LED chips, and the other part of the flip-chip LED chips and the vertical LED chips are at least one of the rest two; the device can be flexibly set according to application requirements, and is good in universality.

For the LED chip, the peak wavelength is directly related to the content of I n component of the LED chip, and the I n component can control the In component by controlling the amount and growth temperature of I n when the quantum well GaN/I nGaN of the epitaxial layer of the LED chip is grown. For example, the longer the I n content, the longer the peak wavelength of the LED chip; the higher the temperature, the more volatilized I n, and the less I n content, the shorter the peak wavelength of the LED chip. Correspondingly, the structures of the LED chips with different peak wavelengths are also different; that is, in this embodiment, the LED chip structures included in the LED chip units are different. Thus, the peak wavelength of the LED chip can be set by controlling the I n component of the LED chip in this embodiment.

Because the excitation efficiency of the LED chip to the fluorescent powder is reduced along with the increase of the wavelength, and different fluorescent powders have fixed excitation efficiency curves, the full-spectrum LED device with low blue light, spectrum continuity and high similarity with natural light is realized by designing the collocation of the spectrum energy and the wavelength of the LED chip in the embodiment. For ease of understanding, the present embodiment is described below with several specific examples of LED chip unit collocations.

In one example, an LED chip of a full spectrum LED device includes a first LED chip unit, a second LED chip unit, and a third LED chip unit electrically connected, and a fluorescent glue covering the three LED chip units. The peak wavelengths of the first LED chip unit, the second LED chip unit and the third LED chip unit are sequentially increased from 415nm to 470nm. According to the principle of balancing blue light energy distribution, the peak wavelengths of the first LED chip unit, the second LED chip unit and the third LED chip unit can be specifically set to be sequentially increased within 430nm to 465nm in this example. For example, the peak wavelength of the first LED chip unit may be set to 430nm to 440nm, the peak wavelength of the second LED chip unit may be set to 445nm to 455nm, and the peak wavelength of the third LED chip unit may be set to 455nm to 465nm. In this example, the phosphor may be configured to include cyan powder, green powder, yellow powder, and red powder, for example, the emission peak wavelength of the cyan powder may be specifically set to 490nm to 510nm under blue light excitation, the emission peak wavelength of the green powder may be set to 520nm to 540nm under blue light excitation, the emission peak wavelength of the yellow powder may be set to 570nm to 590nm under blue light excitation, and the emission peak wavelength of the red powder may be set to 650nm to 660nm under blue light excitation.

In order to further enhance the spectral continuity of the full spectrum LED device in this example, in some application scenarios of this example, the luminous flux of the first LED chip unit may be further set to 80% to 120% of the luminous flux of the second LED chip unit, and the luminous flux of the third LED chip unit may be set to 60% to 100% of the luminous flux of the second LED chip unit 12. The luminous flux in this example is also called radiant power, which refers to radiant energy passing through a certain section in unit time, and is the power emitted, propagated, or received in the form of radiation, and the absolute value unit is mW. That is, in this example, the luminous flux of the first LED chip unit is 80% to 120% and the luminous flux of the third LED chip unit is 60% to 100% on the basis that the luminous flux of the second LED chip unit is 100%. In this example, therefore, the size of the LED chips in the third LED chip unit may be smaller than the sizes of the LED chips in the first LED chip unit and the second LED chip unit, and in this example, it is preferable that the third LED chip unit is disposed between the first LED chip unit and the second LED chip unit, and the first LED chip unit, the third LED chip unit, and the second LED chip unit are electrically connected in this order. The matching of the LED chips with the sizes is more beneficial to the flexible layout of the LED chips on one hand, and the cost can be reduced on the other hand.

In this example, to further improve the spectral continuity of the full-spectrum LED device, the half-wave widths of the second LED chip unit and the third LED chip unit may be further set to 10nm to 20nm, and the half-wave width of the first LED chip unit may be set to 15nm to 25nm. The half-wave width in this example is an amplitude representation of the energy band transition at the time of energy transition, the more energy bands that can be transitioned, the greater the half-wave width. The corresponding is that the slower the growth rate of the LED chip is, the smaller the half-wave width is; the faster the growth rate of the LED chip is, the larger the half-wave width is, so that the corresponding half-wave width of the LED chip can be flexibly set by controlling the growth rate of the LED chip. Through the collocation of the wave bands and the half wave widths of the three LED chip units in the example, a full spectrum LED device with blue light spectrum parts distributed according to the required radiation flux proportion can be obtained.

Correspondingly, in the present example, to further improve the spectral continuity of the full-spectrum LED device, the green powder of the fluorescent powder may be set to have a half-wave width of 30nm to 40nm under blue light excitation, the green powder may have a half-wave width of 95nm to 115nm under blue light excitation, the yellow powder may have a half-wave width of 40nm to 70nm under blue light excitation, and the red powder may have a half-wave width of 80nm to 100nm under blue light excitation.

In this example, by combining the blue light chip set and the fluorescent glue described above, a light source having an extremely wide range of effective synthetic color temperatures can be obtained. For ease of understanding, a description of a few exemplary full spectrum LED devices is provided below.

An exemplary full spectrum LED device includes a base having a receiving cavity (also referred to as a bowl or reflective cavity) with each LED chip unit disposed at a bottom of the receiving cavity, and at least a portion of a fluorescent glue disposed within the receiving cavity to cover each LED chip unit. For example, as shown in fig. 1-1, a full spectrum LED device of an application example includes a base 2, the base 2 includes a receiving cavity 21, each LED chip is disposed in the receiving cavity 21, and at least a portion of the fluorescent glue 3 is filled in the receiving cavity 21. Referring to fig. 1 to 1, the LED chip in the present application example includes a first LED chip unit 11, a third LED chip unit 13, and a second LED chip unit 12 and is sequentially connected in series (of course, may be disposed in parallel or in series-parallel combination); the third LED chip unit 13 is provided between the first LED chip unit 11 and the second LED chip unit 12. In the present application example, the first LED chip unit 11, the third LED chip unit 13, and the second LED chip unit 12 may each include only one LED chip. It should be understood that, according to practical needs, the first LED chip unit 11, the third LED chip unit 13, and the second LED chip unit 12 may each include more than two LED chips, and the LED chips included in each LED chip unit may be connected in series or in parallel. In this application example, the structure of the base 2 and the specific shape and size of the accommodation chamber 21 are not limited. The full-spectrum LED device shown in this application example is a patch-type full-spectrum LED device. When the color temperature of the full-spectrum LED device is 1700K, 2700K or 3000K, the mass ratio of the fluorescent powder to the glue of the fluorescent glue can be set to be 1:1 to 2:1, when the color temperature of the full-spectrum LED device is 4000K, the mass ratio of the fluorescent powder to the glue can be set to be 1:2 to 1:1, when the color temperature of the full-spectrum LED device is 5000K, 5700K or 6500K, the mass ratio of the fluorescent powder to the glue can be set to be 1:3 to 1:1, and when the color temperature of the full-spectrum LED device is 13000K, the mass ratio of the fluorescent powder to the glue can be set to be 1:5 to 1:2, as shown in the following table 1; the proportions of one application example of the cyan, green, yellow, and red powders of the phosphor at the above respective color temperatures are shown in, but not limited to, the following table 1.

TABLE 1

The full spectrum LED device shown in fig. 1-1, the LED chips of each LED chip unit are arranged in rows or columns; but may of course also be arranged in a matrix (i.e. rows and columns) arrangement. The arrangement mode is regular and simple, and is easy to manufacture. In another application example, referring to fig. 1-2, the LED chip units may be connected in parallel (or may be arranged in series or combined in series-parallel), and the LED chips of the LED chip units may also be arranged in a staggered arrangement, where the staggered arrangement makes the first LED chip unit 11, the third LED chip unit 13 and the second LED chip unit 12 have a dislocation in space, so that the light mixing of the three LED chip units is facilitated, and the overall light emitting effect of the LED device is further improved. In another application example, referring to fig. 1-3, the LED chips of each LED chip unit may also be arranged in a delta shape, and this delta shape makes the first LED chip unit 11, the third LED chip unit 13 and the second LED chip unit 12 have a dislocation in space, so that light mixing is facilitated. In another application example, referring to fig. 1 to 4, the LED chips of each LED chip unit may also be arranged in a rotationally symmetrical arrangement, where rotationally symmetrical arrangement means that each LED chip is symmetrically arranged with the center of a circle as a center, so that the first LED chip unit 11, the third LED chip unit 13 and the second LED chip unit 12 are also spatially offset, thereby being more beneficial to light mixing. Therefore, the LED chips of each LED chip unit in the embodiment may be spatially arranged in a staggered manner, so that light can be directly mixed between the LED chips in the staggered space. And the specific arrangement is not limited to that shown in fig. 1-1 to fig. 1-4.

Another example full spectrum LED device includes a substrate, each LED chip unit is disposed on one side (front or back) of the substrate, and fluorescent glue is disposed on the substrate to cover each LED chip unit. For example, as shown in fig. 2-1, a full spectrum LED device of an application example includes a substrate 4, each LED chip is disposed on the substrate 4, and a fluorescent glue 3 is disposed on the substrate 4 to cover each LED chip. The LED chip in this application example includes the first LED chip unit 11, the third LED chip unit 13, and the second LED chip unit 12 and is connected in parallel (of course, may be provided as a series or a series-parallel combination); the third LED chip unit 13 is provided between the first LED chip unit 11 and the second LED chip unit 12. In the present application example, the first LED chip unit 11, the third LED chip unit 13, and the second LED chip unit 12 may each include only one LED chip. It should be understood that, according to practical needs, the first LED chip unit 11, the third LED chip unit 13, and the second LED chip unit 12 may each include more than two LED chips, and the LED chips included in each LED chip unit may be connected in series or in parallel. In this application example, there is no limitation on the shape, size, structure, and whether the base 4 is a rigid plate or a flexible plate. The full spectrum LED device shown in this application example is COB Ch ip On Board, chip-on-board packaging technology). The mass ratio of the fluorescent powder to the glue is 1:2 to 1:1 when the color temperature of the full-spectrum LED device is 1700K, 2700K or 3000K, 1:3 to 1:1 when the color temperature of the full-spectrum LED device is 4000K, 1:4 to 1:1 when the color temperature of the full-spectrum LED device is 5000K, 5700K or 6500K, and 1:5 to 1:2 when the color temperature of the full-spectrum LED device is 13000K. At the above respective color temperatures, the proportions of one example of the cyan, green, yellow, and red powders of the phosphor are shown in, but not limited to, table 2 below.

TABLE 2

The full spectrum LED device shown in fig. 2-1, the LED chips of each LED chip unit are arranged in rows or columns; of course, in this example, the LED chips of each LED chip unit may be spatially offset, so that light can be directly mixed between the LED chips in the offset space. For example, the staggered arrangement shown in fig. 2-2, the inverted-v arrangement shown in fig. 2-3, or the rotationally symmetrical arrangement shown in fig. 2-4 may be adopted, and the specific arrangement is not limited to the arrangement shown in fig. 2-1 to 2-4.

The full spectrum LED device shown in each embodiment has the advantages of low blue light, spectrum continuity, high similarity with natural light and the like. For ease of understanding, the full spectrum LED device shown in fig. 1-1 (hereinafter referred to as "new light source") is illustrated below with respect to its optical performance at 5000K color temperature, as compared to the full spectrum LED devices currently on the market, as well as to conventional Ra90 LED devices. The spectrum of the chip-combined full spectrum LED device (hereinafter referred to as "main stream light source") on the market is shown in fig. 3-1, the spectrum of the chip-combined conventional Ra90 light source (hereinafter referred to as "conventional Ra 90") is shown in fig. 3-2, and the spectrum of the LED chip-combined fig. 1-1 is shown in fig. 4-1. In fig. 3-1 to 4-1, the abscissa indicates wavelength, and the ordinate indicates relative spectral intensity value, where relative spectral intensity refers to a spectrum diagram generated by performing spectrum normalization with reference to the highest peak value of the spectral intensity being 1. The color tone parameters measured for the three light sources under the I ES (I l l umi nat I ng Engi neer I ng Society of North Amer I ca, north American Lighting Engineers) TM-30-15 standard are shown in Table 3. Where Rf in Table 3 below is the fidelity, otherwise known as the color gamut value, i.e., the degree of similarity of each standard color under test light source illumination compared to reference light source illumination, the higher the value, the better the color fidelity. Rf is equal to 100 and is the maximum value, and the Rf represents no color difference with the color under a natural light source, so that the color effect is vivid; rf is equal to 0 and is the minimum value, and represents the maximum color difference with the color under the natural light source and the distortion of the color effect. Rg is the saturation, i.e. the saturation of each standard color under illumination by the test light source compared to the reference light source, with an index of 100 representing the best saturation. Rg is equal to 100, the saturation of the light source is the same as that of natural light, and the color saturation is moderate; rg is greater than 100, representing light source oversaturation; rg is less than 100, representing insufficient light source color saturation.

TABLE 3 Table 3

The evaluation of the new light source in this example at a color temperature of 5000K under the TM-30-15 standard is shown in FIGS. 4-2 to 4-7. Wherein fig. 4-2 shows a spectral power distribution diagram of a new light source, in which the abscissa is wavelength, the ordinate is SPD (Spectra l Power D i str i but ion ), in which Reference source is Reference natural light, and the diagram is a spectral diagram of a compared spectrum and a comparison spectrum (i.e., 5000K new scheme in the diagram) generated by performing energy normalization with Reference to energy 1 of the compared spectrum (i.e., reference source in the diagram); fig. 4-7 to fig. 4-14 in this embodiment are also generated by the same principle, and will not be described in detail later. Fig. 4-7 are spectral contrast plots of the addition of the existing mainstream light source and the conventional Ra90 light source on the basis of fig. 4-2. Fig. 4-3 are schematic diagrams of Rf-Rg of the new light source, wherein the black dots represent the reference light source (i.e., natural light), and fig. 4-4 are Rf tone maps of the new light source. As can be seen from fig. 4-4, the new light sources have Rf corresponding to each standard color (indicated by the abscissa in fig. 4-4) that is much greater than 90 and is substantially between 95 and 100; as can be seen from the corresponding relationship between Rf and Rg shown in FIG. 4-3, the Rg value is also substantially between 95 and 100, and referring to the test results in Table 3, when Rf is 97.9, the Rg value can reach 100.

As is apparent from the above figures, the spectral continuity and the similarity with natural light of the full-spectrum LED device in fig. 1-1 are significantly improved, the blue peak is greatly reduced, and both Rf and Rg are greatly improved.

Fig. 4-5 are color vector diagrams of a conventional mainstream light source, wherein circle A0 represents a reference light source (natural light), which is composed of 16 color classifications of the reference light source, and circle A1 represents a measured light source. Any red line within the black circle indicates that the colors of the measured light source are darker than the reference light source, and any line outside the A0 circle indicates that the colors of the measured light source are over saturated than the reference light source. When the two circles A0 and A1 are perfectly overlapped, the colors of the measured light source and the reference light source are the same, and the color rendering property between the two light sources is not different. Fig. 4-6 are color vector diagrams of full spectrum LED devices in the new light source, and the two circles A0 and A1 are perfectly overlapped, that is, the color rendering of the light emitted by the full spectrum LED devices in fig. 1-1 is basically not different from that of the reference light source (natural light); in other words, the light emitted by the full-spectrum LED device can maximally approach natural light, so that the full-spectrum LED device can achieve better continuity effect, the similarity between the full-spectrum LED device and the natural light is greatly improved, and better eye protection and color effect are achieved.

To facilitate understanding of the problem of continuity, the concept of ASD (Average Spectra lD ifference, spectrum difference) is introduced herein, where ASD represents the ratio of the spectrum difference area of the measured light source to the standard light source to the spectrum area of the standard light source, and is an index for measuring the spectrum continuity, and the smaller the better, the minimum value is 0. The ASD value is calculated as shown in the following formula (1):

ASD＝∫ ^λ _λ ² ₁ ∣A(λ)-S(λ)∣/S(λ)dλ………………(1)；

where A (λ) is the target spectrum and S (λ) is the natural light spectrum. Let λ1=400 nm, λ2=700 nm, and the ASD values calculated according to the above formula (1) are shown in table 5. It can be seen that the ASD value of the new light source in this example is much smaller than the Ra90 light source and the mainstream light sources on the market.

TABLE 5

Parameters (parameters)	Mainstream light source	Conventional Ra90	New light source
				ASD	23.62％	28.01％	14.13％

The full spectrum LED devices shown in fig. 1-2 to 2-4 also have the advantages of low blue light, spectral continuity, high similarity to natural light, and the like. The full spectrum LED devices shown in fig. 1-2 through 2-4 and the full spectrum LED device shown in fig. 1-1 were tested to have substantially identical optical properties at 5000K color temperature. The spectral power distribution diagrams at 1700K, 2700K, 3000K, 4000K, 5700K, 6500K and 13000K are shown in fig. 4-8 to fig. 4-14, respectively (see in particular the curves shown in the new schemes of the figures).

According to the principle of balancing the blue light energy distribution, the peak wavelengths of the first LED chip unit, the second LED chip unit and the third LED chip unit in fig. 1-1 to 2-4 may also be specifically set to sequentially increase in 415nm to 470nm in this example. For example, the peak wavelength of the first LED chip unit may be specifically set to 415nm to 430nm, the peak wavelength of the second LED chip unit may be set to 440nm to 450nm, the peak wavelength of the third LED chip unit may be set to 450nm to 465nm, the half-wave width range of each group of LED chip units may be properly adjusted or kept unchanged, and the phosphor may be kept unchanged or properly adjusted; or specifically setting the peak wavelength of the first LED chip unit to be 420nm to 435nm, the peak wavelength of the second LED chip unit to be 436nm to 450nm, and the peak wavelength of the third LED chip unit to be 455nm to 460nm, wherein the half-wave width range of each group of LED chip units can be properly adjusted or kept unchanged, and the fluorescent powder is kept unchanged or properly adjusted; or specifically setting the peak wavelength of the first LED chip unit to be 400-435 nm, the peak wavelength of the second LED chip unit to be 440-450 nm, and the peak wavelength of the third LED chip unit to be 450-460 nm; the half-wave width range of each group of LED chip units can be properly adjusted or kept unchanged, the fluorescent powder is kept unchanged or properly adjusted, and the like. And the light emitting effect of the full spectrum LED device obtained after the adjustment is similar to that of the full spectrum LED device shown in the figure 1-1 through testing, namely, the spectral continuity and the similarity with natural light can be improved, and the blue light peak value can be reduced.

In another example of this embodiment, the LED chip units of the full spectrum LED device include a fourth LED chip unit, a fifth LED chip unit, a sixth LED chip unit, and a seventh LED chip unit electrically connected (may be in series, parallel, or a combination of series and parallel), and peak wavelengths of the four LED chip units take different range values from 415nm to 470nm, for example, peak wavelengths of the respective LED chip units sequentially increase. According to the principle of balancing the blue light energy distribution, the peak wavelength of the fourth LED chip unit may be set to 415nm to 425nm, the peak wavelength of the fifth LED chip unit may be set to 430nm to 440nm, the peak wavelength of the sixth LED chip unit may be set to 445nm to 455nm, and the peak wavelength of the seventh LED chip unit may be set to 460nm to 470nm. In this example, the phosphor may be provided as including cyan, green, yellow, and red. For example, the emission peak wavelength of green powder under blue light excitation is 490nm to 510nm, the emission peak wavelength of green powder under blue light excitation is 520nm to 540nm, the emission peak wavelength of yellow powder under blue light excitation is 570nm to 590nm, and the emission peak wavelength of red powder under blue light excitation is 650nm to 660nm.

In order to further improve the spectral continuity of the full-spectrum LED device in the present example, the fourth LED chip unit and the sixth LED chip unit may be further provided to have a luminous flux of 80% to 120% of that of the fifth LED chip unit, and the seventh LED chip unit may have a luminous flux of 60% to 100% of that of the fifth LED chip unit. That is, in this example, the luminous fluxes of the fourth and sixth LED chip units are 80% to 120% and the luminous fluxes of the seventh LED chip unit are 60% to 100% on the basis that the luminous fluxes of the fifth LED chip unit are 100%. The blue spectrum obtained after the combination of the four is similar to that shown in fig. 4-1. Therefore, in this example, the size of the LED chip in the seventh LED chip unit may be smaller than the sizes of the LED chips in the fourth LED chip unit, the fifth LED chip unit and the sixth LED chip unit, so that the matching of the LED chips with the sizes is more beneficial to the flexible layout of the LED chips, and the cost can be reduced; and the seventh LED chip unit can be arranged between the fourth LED chip unit and the fifth LED chip unit, and the fourth LED chip unit, the seventh LED chip unit, the fifth LED chip unit and the sixth LED chip unit are connected in series, in parallel or in series-parallel combination, so that the light mixing of the LED chip units of each group is facilitated, and the light emitting effect is ensured.

In this example, in order to further improve the spectral continuity of the full-spectrum LED device, a fifth LED chip unit, a sixth LED chip unit, and a seventh LED chip unit may be further provided with a half-wave width of 10nm to 20nm, and a half-wave width of 15nm to 25nm. Through the collocation of the wave bands and the half wave widths of the four LED chips in the example, a full spectrum LED device with blue light spectrum parts distributed according to the required radiation flux proportion can be obtained.

Correspondingly, in the present example, to further improve the spectral continuity of the full-spectrum LED device, the green powder of the fluorescent powder may be set to have a half-wave width of 30nm to 40nm under blue light excitation, the green powder may have a half-wave width of 95nm to 115nm under blue light excitation, the yellow powder may have a half-wave width of 40nm to 70nm under blue light excitation, and the red powder may have a half-wave width of 80nm to 100nm under blue light excitation.

In this example, by combining the blue light chip set and the fluorescent glue described above, a light source having an extremely wide range of effective synthetic color temperatures can be obtained. For ease of understanding, a full spectrum LED device is also described below with several application examples.

Full spectrum LED device in an application example referring to fig. 5, the full spectrum LED device includes a base 2, the base 2 includes a receiving cavity 21, the fourth LED chip unit 14, the fifth LED chip unit 15, the sixth LED chip unit 16, and the seventh LED chip unit 17 are all disposed in the receiving cavity 21 and are sequentially connected in series (alternatively connected in parallel or connected in series-parallel), and at least a part of the fluorescent glue 3 is filled in the receiving cavity 21. In the present application example, the fourth LED chip unit 14, the fifth LED chip unit 15, the sixth LED chip unit 16, and the seventh LED chip unit 17 may each include only one LED chip. It should be understood that, according to practical needs, the fourth LED chip unit 14, the fifth LED chip unit 15, the sixth LED chip unit 16, and the seventh LED chip unit 17 may each include more than two LED chips. In this application example, the structure of the base 2 and the specific shape and size of the accommodation chamber 21 are not limited. And the arrangement of the LED chips of each LED chip unit in this example can be seen, but is not limited to, the arrangement of the above examples. The color temperature of the full spectrum LED device in this example may cover 1700K to 13000K, the composition of the phosphor may be the same as the phosphor in each example described above or may be finely adjusted according to the requirements, and the light performance of the full spectrum LED device tested is substantially identical to that of the full spectrum LED device in each example described above, which will not be described again here.

The full spectrum LED device in another application example is shown in fig. 6-1, and includes a substrate 4, where each LED chip unit is disposed on the same surface of the substrate 4 (for example, disposed on the front surface or the back surface of the substrate 4), and a fluorescent glue 3 is disposed on the substrate 4 to cover each LED chip unit; referring to fig. 6-1, in this application example, the fourth LED chip unit 14, the fifth LED chip unit 15, the sixth LED chip unit 16, and the seventh LED chip unit 17 are all disposed on the substrate 4 and connected in parallel (alternatively, connected in series or in series-parallel). And the fourth LED chip unit 14, the fifth LED chip unit 15, the sixth LED chip unit 16 and the seventh LED chip unit 17 may each include only one LED chip, or may be configured to include more than two LED chips as required. The full spectrum LED device shown in the figure 6-1 obtained in the application example is a COB full spectrum LED device; the color temperature of the full spectrum LED device can also cover 1700K to 13000K, the composition of the fluorescent powder can be the same as that of the fluorescent powder in each example or can be finely adjusted according to the requirement, and the light performance of the full spectrum LED device is basically consistent with that of the full spectrum LED device in each example, and the description is omitted here. The LED chips of the LED units of the full spectrum LED device shown in fig. 6-1 are arranged in a column, but may be adjusted to be arranged in a matrix according to the need, for example, as shown in fig. 6-2.

In other application examples of the present embodiment, the combination of peak wavelengths of the four LED chip units set in fig. 5 to 6-2 may be appropriately adjusted within 415nm to 470nm in the present example, according to the principle of balancing blue light energy distribution. For example, the peak wavelength of the fourth LED chip unit 14 may be set to 416nm to 426nm, the peak wavelength of the fifth LED chip unit 15 may be set to 431nm to 441nm, the peak wavelength of the sixth LED chip unit 16 may be set to 446nm to 456nm, the peak wavelength of the seventh LED chip unit 17 may be set to 461nm to 470nm, the half-wave width range of each group of LED chip units may be appropriately adjusted or kept unchanged, and the phosphor may be kept unchanged or appropriately adjusted; or specifically setting the peak wavelength of the fourth LED chip unit 14 to be 415nm to 430nm, the peak wavelength of the fifth LED chip unit 15 to be 431nm to 445nm, the peak wavelength of the sixth LED chip unit 16 to be 446nm to 460nm, the peak wavelength of the seventh LED chip unit 17 to be 461nm to 470nm, the half-wave width range of each group of LED chip units can be properly adjusted or kept unchanged, and the fluorescent powder can be kept unchanged or properly adjusted; or specifically setting the peak wavelength of the fourth LED chip unit 14 to be 415nm to 429nm, the peak wavelength of the fifth LED chip unit 15 to be 430nm to 444nm, the peak wavelength of the sixth LED chip unit 16 to be 445nm to 459nm, and the peak wavelength of the seventh LED chip unit 17 to be 460nm to 468nm; the half-wave width range of each group of LED chip units can be properly adjusted or kept unchanged, the fluorescent powder is kept unchanged or properly adjusted, and the like. And the light emitting effect of the full spectrum LED device obtained after the adjustment is similar to that of the full spectrum LED device shown in figures 3-3, namely, the spectral continuity and the similarity with natural light can be improved, and the blue light peak value can be reduced.

The above examples illustrate the combination of three LED chip units and four LED chip units, respectively, but it should be understood that in this embodiment, five or more light LED chip groups may be used according to the requirements, and one group of LED chip units may include only one LED chip with a peak wavelength and a half-wave width, or may be set as multiple LED chips according to the requirements, which will not be described herein again. In the present embodiment, the green powder in each of the above examples may employ, but is not limited to, nitrogen oxides BaSi2O2n2:eu2+; the green powder can be, but is not limited to, aluminate Lu3Al5O12:Ce3+; the yellow powder can adopt, but is not limited to, silicate Ba2S iO4, eu2+ or S iAlON, eu2+ and the like; and red powder may be, but is not limited to, nitride Sr, caAl SiN3:Eu2+; the specific materials of the green powder, the yellow powder and the red powder are not limited in the embodiment.

The embodiment also provides an LED device, which comprises a device main body and at least one full-spectrum LED device, wherein the full-spectrum LED device is arranged on the device main body. The LED device in this embodiment may be a lighting device, for example, but not limited to, various lamps, the device body may be a lamp socket, and at least one full spectrum LED device may be disposed on the lamp socket. The LED device may be used in, but is not limited to, household lighting, medical lighting, educational lighting, plant lighting, decorative lighting, traffic lighting, etc. Of course, the LED device may also be used as a key backlight or illumination source for a mobile phone, a calculator, a keyboard, etc. having a key device; or a flash lamp or a light supplementing lamp of the camera.

In this embodiment, the LED device may also be a display device, where the device body may be, but is not limited to, a display screen body, and at least one full spectrum LED device may be disposed on the display screen body. The LED device can be applied to a backlight display screen as a backlight light source and can also be applied to a direct display screen as a direct display light source.

The above applications are only a few applications of the embodiment shown in the present embodiment, and are not limited to the fields of the above examples, and are not described in detail herein.

It is to be understood that the utility model is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.

Claims (12)

1. The full spectrum LED device is characterized by comprising an LED chip with the peak wavelength of 415nm to 470nm and fluorescent glue mixed with fluorescent powder; the LED chips comprise at least three LED chip units with peak wavelengths within 415nm to 470nm, the quantity of the LED chips contained in each LED chip unit is the same, the LED chip units are electrically connected, and the peak wavelength ranges of the LED chip units are different; and the fluorescent glue covers each LED chip unit.

2. The full spectrum LED device of claim 1, wherein said LED chip comprises a first LED chip unit having a peak wavelength of 430nm to 440nm, a second LED chip unit having a peak wavelength of 445nm to 455nm, and a third LED chip unit having a peak wavelength of 455nm to 465nm.

3. The full spectrum LED device of claim 2, wherein the half-wave width of the second LED chip unit and the third LED chip unit is 10nm to 20nm, and the half-wave width of the first LED chip unit is 15nm to 25nm.

4. The full spectrum LED device of claim 2, wherein the size of the LED chips in said third LED chip unit is smaller than the size of the LED chips in said first LED chip unit and said second LED chip unit.

5. The full spectrum LED device of claim 4, wherein said third LED chip unit is located between said first LED chip unit and said second LED chip unit, said first LED chip unit, third LED chip unit, said second LED chip unit being disposed in sequence.

6. The full spectrum LED device of claim 1, wherein the LED chip comprises a fourth LED chip unit having a peak wavelength of 415nm to 425nm, a fifth LED chip unit having a peak wavelength of 430nm to 440nm, a sixth LED chip unit having a peak wavelength of 445nm to 455nm, and a seventh LED chip unit having a peak wavelength of 460nm to 470nm.

7. The full spectrum LED device of claim 6, wherein the half wave width of said fifth LED chip unit, said sixth LED chip unit and said seventh LED chip unit is 10nm to 20nm, and the half wave width of said fourth LED chip unit is 15nm to 25nm.

8. The full spectrum LED device of any one of claims 1-7, wherein each of said LED chip units is an LED chip; or, each LED chip unit includes at least two LED chips.

9. The full spectrum LED device of claim 8, wherein each of said LED chips is arranged in rows and/or columns, or in staggered arrangement, or in rotational symmetry, or in a delta arrangement.

10. The full spectrum LED device of any of claims 1-7, further comprising a substrate, wherein each of the LED chip units is disposed on a front surface of the substrate, and wherein the fluorescent glue is disposed on the substrate to cover each of the LED chip units.

11. The full spectrum LED device of any one of claims 1-7, further comprising a submount, wherein the submount is provided with a receiving cavity, each of the LED chip units is provided at a bottom of the receiving cavity, and at least a portion of the fluorescent glue is provided in the receiving cavity to cover each of the LED chip units.

12. An LED device comprising a device body and at least one full spectrum LED device according to any one of claims 1-11, said full spectrum LED device being provided on said device body.