DISPOSITIVO EMISSOR DE LUZ, E, APARELHO DE ILUMINAÇÃO

Description

30 LIGHT EMITTING DEVICE AND LIGHTING APPARATUS DIVIDED FROM BR112022018956-7, FILED ON 02 / 17 / 2021 FIELD OF TECHNOLOGY

[001] The present description refers to a light-emitting device and a lighting device supplied with it. FUNDAMENTALS OF THE TECHNIQUE

[002] A light-emitting device using a light-emitting element referred to as a light-emitting diode (which may be referred to hereafter as an “LED”) is receiving attention. Examples include a light-emitting device comprising a combination of an LED that emits blue light and a fluorescent material that emits yellow light. The light-emitting device emits white light by mixing the blue light from the blue LED and the yellow light emitted by the fluorescent material excited by the blue light.

[003] The light-emitting device including a combination of a light-emitting element that emits blue light and a fluorescent material that emits yellow light has a high light-emitting efficiency due to the strong radiation intensity in the visible light region. In addition, in some cases, a light-emitting device with a medium-high color rendering index may be required, which is an index of the color visibility (color rendering property) of the irradiated matter.

[004] The procedure for evaluating the color rendering property of a light source is determined by JIS Z8726 in such a way that the color differences ΔΕΐ (where i represents an integer from 1 to 15) in the colorimetry of the test colors (R1 to R15) having the prescribed reflectance characteristics with the test light source and the standard light source are calculated by means of numerical calculation. The upper limit of each of the color rendering indices Ri (where i represents an integer from 1 to 15) is 100. Consequently, in the case where the color difference between the test light source and the standard light source having a color temperature Petition 870260047189, dated 05 / 18 / 2026, p. 12 / 55 / 30 corresponding to the test light source being smaller, the color rendering index is increased close to 100.

[005] In relation to the above, a light-emitting device has been proposed using an LED that emits blue light and two types of fluorescent materials emitting yellow to green light, and is said to achieve high color reproducibility (see, for example, Patent Documents 1 and 2). LIST OF QUOTES PATENT DOCUMENT

[006] Patent Document 1: Japanese Patent Open to the Public No. 2003-535477 Patent Document 2: Japanese Patent Open to the Public No. 2003-535478 SUMMARY OF THE INVENTION PROBLEM TO BE SOLVED BY THE INVENTION

[007] However, in the case where the average color rendering index Ra needs to be increased, the light emission efficiency of the light-emitting device tends to decrease. In recent years, moreover, regarding the light-emitting device using an LED, in some cases there is a demand for a light-emitting device that has a high light emission efficiency and, simultaneously, has not only a high average color rendering index Ra, but also a high particular color rendering index, for example, R15.

[008] An object of an embodiment of the present description is to provide a light-emitting device having a high particular color rendering index and a high light-emitting efficiency and a lighting apparatus provided therewith. WAYS TO SOLVE PROBLEMS

[009] The present invention encompasses the following embodiments.

[0010] A first modality refers to an emitting device Petition 870260047189, dated 05 / 18 / 2026, p. 13 / 55 / 30 of light including a light-emitting element having a peak emission wavelength in a range of 430 nm or more and 470 nm or less, and a fluorescent member including two or more types of rare-earth aluminate fluorescent materials including at least one type selected from the group consisting of a first fluorescent material having a composition represented by the following formula (I), a second fluorescent material having a composition represented by the following formula (II) and a third fluorescent material having a composition represented by the following formula (III), a fourth fluorescent material having a composition represented by the following formula (IV) and a fifth fluorescent material having a composition represented by the following formula (V): Y3(Al,Ga>O12:Ce (I) Lu3Al5O12:Ce (II) Y3Al5O12:Ce (III) A2[M11-pMn4+pF6] (IV) (Sr,Ca)AlSiN3:Eu (V) where in formula (IV), A includes at least one type selected from the group consisting of K, Li, Na, Rb, Cs and NH4+, M1 includes at least one type of an element selected from the group consisting of an element from Group 4, an element from Group 13 and an element from Group 14, and p represents a number that satisfies 0 < p < 0.2.

[0011] A second embodiment refers to a lighting device supplied with the light-emitting device. EFFECT OF THE INVENTION

[0012] According to an embodiment of the present description, a light-emitting device that is capable of achieving excellent color rendering properties and high light emission efficiency, and a lighting apparatus provided with the same. Petition 870260047189, dated 05 / 18 / 2026, p. 14 / 55 / 30 BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic cross-sectional view of an embodiment of the light-emitting device according to the present invention.

[0014] Figure 2 is a diagram showing the light emission spectrum of the light-emitting device from Example 1, the light emission spectrum of the light-emitting device from Comparative Example 1, and the spectrum of the standard light source having a correlated color temperature of 6,500 K.

[0015] Figure 3 is a diagram showing the light emission spectrum of the light-emitting device from Example 2, the light emission spectrum of the light-emitting device from Comparative Example 2, and the spectrum of the standard light source having a correlated color temperature of 5,000 K.

[0016] Figure 4 is a diagram showing the light emission spectrum of the light-emitting device from Example 3, the light emission spectrum of the light-emitting device from Comparative Example 3, and the spectrum of the standard light source having a correlated color temperature of 4,000 K.

[0017] Figure 5 is a diagram showing the light emission spectrum of the light-emitting device from Example 4, the light emission spectrum of the light-emitting device from Comparative Example 4, and the spectrum of the standard light source having a correlated color temperature of 3,500 K.

[0018] Figure 6 is a diagram showing the light emission spectrum of the light-emitting device from Example 5, the light emission spectrum of the light-emitting device from Comparative Example 5, and the spectrum of the standard light source having a correlated color temperature of 3,000 K.

[0019] Figure 7 is a diagram showing the light emission spectrum of the light-emitting device of Example 6, the light emission spectrum of the light-emitting device of Comparative Example 6, and the spectrum of the standard light source having a correlated color temperature of 2,700 K. METHOD(S) FOR CARRYING OUT THE INVENTION Petition 870260047189, dated 05 / 18 / 2026, page 15 / 55 / ​​30

[0020] The light-emitting device and the lighting device provided with it according to this description will be described with reference to the embodiments below. However, the embodiments shown below are for practicing the technical concept of the present invention and do not identify the present invention. In the description in this document, the relationship between color names and chromaticity coordinates, the relationship between wavelength ranges and monochromatic light color names and the like are in accordance with JIS Z8110. In the case of there being several substances in the composition corresponding to each of the components, the content of each of the components in the composition means the total quantity of the various substances present in the composition, unless otherwise indicated. The average particle diameter of the fluorescent material is a value referred to as a Fisher Sub Sieve Sizer's No., and measured by the air permeability method.

[0021] [Light Emitting Device] The light emitting device includes a light emitting element having a peak emission wavelength in a range of 430 nm or more and 470 nm or less, and a fluorescent member including two or more types of rare earth aluminate fluorescent materials including at least one type selected from the group consisting of a first fluorescent material having a composition represented by the following formula (I), a second fluorescent material having a composition represented by the following formula (II) and a third fluorescent material having a composition represented by the following formula (III), a fourth fluorescent material having a composition represented by the following formula (IV) and a fifth fluorescent material having a composition represented by the following formula (V). Y3(Al,Ga)5O12:Ce (I) Lu3Al5O12:Ce (II) Y3Al5O12:Ce (III) Petition 870260047189, dated 05 / 18 / 2026, p. 16 / 55 / ​​​​30 A2[M1i-pMn4+pF6] (IV) (Sr,Ca)AlSiN3:Eu (V)

[0022] In formula (IV), A includes at least one type selected from the group consisting of K, Li, Na, Rb, Cs and NHL, M1 includes at least one type of an element selected from the group consisting of an element from Group 4, an element from Group 13 and an element from Group 14, ep represents a number that satisfies 0 < p < 0.2.

[0023] The light-emitting element with a peak emission wavelength in a range of 430 nm or more and 470 nm or less emitting blue-violet to blue color is used in combination with two or more types of rare-earth aluminate fluorescent materials, including at least one type selected from the group consisting of the first fluorescent material, the second fluorescent material and the third fluorescent material, in addition to the fourth fluorescent material and the fifth fluorescent material emitting red light. According to the configuration, the emission spectrum of blue-violet to blue color in a range of 430 nm or more and 470 nm or less can be suppressed from becoming an especially high intensity, and the emission intensity of the light emission spectrum in a wavelength range of yellow to green color can be greatly intensified.In particular, the phenomenon whereby only the light emission spectrum in a wavelength range from blue to violet becomes especially intense can be suppressed, and the light emission spectrum in a wavelength range from yellow to green can be further approximated to the standard light source to increase the light emission component of green light having a high luminosity factor, allowing for excellent color rendering properties and high light emission efficiency.

[0024] Regarding the color rendering property, the CIE Petition 870260047189, dated 18 / 05 / 2026, p. 17 / 55 / 30 (Commission Internationale de l'Eclairage) published guidelines on the color rendering property that fluorescent lamps should meet in 1986, and according to the guidelines, the preferred average color rendering index (hereinafter referred to as “Ra”) corresponding to places of use is 60 or more and less than 80 for workplaces for general work, 80 or more and less than 90 for residences, hotels, restaurants, shops, offices, schools, hospitals, workplaces for precise work and similar, and 90 or more for places for clinical examinations, museums and similar that require high color rendering property.

[0025] The Ra of the light-emitting device is, for example, 80 or more, preferably 90 or more, and most preferably 95 or more. The upper limit of Ra is 100.The special color rendering indices are expressed by the indices R9 to R15 and are designated as red for R9, yellow for R10, green for R11, blue for R12, Western skin tone for R13, leaf color for R14, and Japanese skin tone for R15. The special color rendering indices are said to be preferably as high as possible, and the R9 to R15 of the light-emitting device of the present embodiment are, each, for example, 50 or more, preferably 60 or more, more preferably 70 or more, and even more preferably 80 or more. The upper limit of each of the R9 to R15 is 100. The R15 of the light-emitting device is preferably an even higher value, and is particularly preferably 85 or more, 90 or more, 92 or more, or 93 or more.

[0026] The light emitted by the light-emitting device is mixed light of the light emitted by the light-emitting element and the fluorescent light emitted by two or more types of rare-earth aluminate fluorescent materials, including at least one type selected from the group consisting of the first fluorescent material, the second fluorescent material and the third fluorescent material, the fourth fluorescent material and the fifth fluorescent material, and may be, for example, light included in a coordinate of Petition 870260047189, dated 05 / 18 / 2026, p. 18 / 55 / 30 chromaticity according to CIE 1931 in a range of x = 0.20 to 0.50 and y = 0.20 to 0.50, and light may be included in a range of x = 0.30 to 0.50 and y = 0.30 to 0.45.

[0027] The correlated color temperature of the light emitted from the light-emitting device may be, for example, 2,000 K or more and may be 2,500 K or more. The correlated color temperature may be 8,000 K or less, and may be 7,000 K or less.

[0028] A light-emitting device 100, as an example of a light-emitting device, will be described with reference to the drawing. Figure 1 is a schematic cross-sectional view showing the light-emitting device 100.

[0029] The light-emitting device 100 includes a light-emitting element 10 of a gallium nitride-based semiconductor compound that emits light in the short wavelength side of visible light (for example, in a range of 380 nm or more and 485 nm or less) having a peak light emission wavelength in a range of 430 nm or more and 470 nm or less, and a molded article 40 for mounting the light-emitting element 10 thereon. The molded article 40 includes a first conductor 20, a second conductor 30, and a resin portion 42 containing a thermoplastic resin or a thermosetting resin, which are fully molded. The molded article 40 has formed in it a recessed portion having a bottom surface and a side surface, and the light-emitting element 10 is placed on the bottom surface of the recessed portion.The light-emitting element 10 has a pair of positive and negative electrodes, and a pair of positive and negative electrodes is electrically connected to the first conductor 20 and the second conductor 30 through the wire 60, respectively. The light-emitting element 10 is covered with a fluorescent member 50. The fluorescent member 50 includes, for example, as a fluorescent material 70 that converts the wavelength of light from the light-emitting element 10, two types of materials. Petition 870260047189, dated 05 / 18 / 2026, page 19 / 55 / ​​30 rare earth aluminate fluorescent materials 71 and 72 containing at least one type selected from the group consisting of a first fluorescent material, a second fluorescent material and a third fluorescent material, a fourth fluorescent material 73, a fifth fluorescent material 74 and a resin.

[0030] The fluorescent member 50 not only converts the wavelength of light emitted by the light-emitting element 10, but also functions as a member to protect the light-emitting element 10 from the external environment. In Figure 1, the fluorescent material 70 is located in the fluorescent member 50. In the case where the fluorescent material 70 is placed close to the light-emitting element 10 in this way, the wavelength of light from the light-emitting element 10 can be efficiently converted, resulting in a light-emitting device with excellent light emission efficiency. The positions of the fluorescent member 50 including the fluorescent material 70 and the light-emitting element 10 are not limited to the configuration in which these items are placed close to each other, and the fluorescent material 70 can be placed in the fluorescent member 50 away from the light-emitting element 10 in consideration of the influence of heat on the fluorescent material 70.Alternatively, fluorescent material 70 can be mixed substantially uniformly onto fluorescent member 50, so as to provide light with even more suppressed color irregularities. (Light Emitting Element)

[0031] The light-emitting element has a peak light emission wavelength in a range of 430 nm or more and 470 nm or less, and from the point of view of light emission efficiency and color rendering property, it is preferably in a range of 440 nm or more and 465 nm or less, more preferably in a range of 445 nm or more and 460 nm or less, and may be in a range of 450 nm or more and 460 nm or less. Petition 870260047189, dated 05 / 18 / 2026, p. 20 / 55 / ​​​​30 less. With the use of the light-emitting element as the excitation light source, the light-emitting device is constituted which emits mixed light from the light-emitting element and fluorescent light from the fluorescent material.

[0032] The full width at half the maximum of the light emission spectrum of the light-emitting element can be, for example, 30 nm or less.

[0033] The light-emitting element used is preferably a semiconductor light-emitting element, such as an LED. The use of a semiconductor light-emitting element as a light source can provide a light-emitting device that has high efficiency, output with high linearity to input and high resistance to mechanical impacts, resulting in high stability.

[0034] Examples of the semiconductor light-emitting element used include a semiconductor light-emitting element that emits blue or similar light using a nitride-based semiconductor (InXAlYGa1-X-YN, where X and Y satisfy 0 < X, 0 < Y and X+Y < 1).

[0035] In the description of this document, full width at half maximum means the full width at half maximum of the light emission peak in the light emission spectrum, that is, the wavelength width of the light emission peak showing 50% of the maximum value of the light emission peak in the light emission spectrum. (Fluorescent Material)

[0036] The light-emitting device includes a fluorescent member that absorbs a portion of the light emitted from the light-emitting element and includes two or more types of rare-earth aluminate fluorescent materials, including at least one type selected from the group consisting of the first fluorescent material having a composition represented by formula (I), the second fluorescent material having a composition represented by formula (II), and the third fluorescent material having a Petition 870260047189, dated 05 / 18 / 2026, page 21 / 55 / ​​30 composition represented by formula (III), in the fourth fluorescent material having a composition represented by formula (IV) and in the fifth fluorescent material having a composition represented by formula (V). The first fluorescent material, the second fluorescent material, the third fluorescent material, the fourth fluorescent material and the fifth fluorescent material have the particular compositions represented by the formulas mentioned above, respectively.The ratio of components of the two or more types of rare earth aluminate fluorescent materials, including at least one type selected from the group consisting of the first fluorescent material, the second fluorescent material and the third fluorescent material, the fourth fluorescent material and the fifth fluorescent material contained in the fluorescent member, is appropriately selected, and thus the color rendering property can be regulated to the desired range, for example, the average color rendering index Ra of the light-emitting device can be regulated to 90 or more, and the special color rendering index R15 of the same can be regulated to 85 or more, while intensifying the luminous flux of the light-emitting device.

[0037] The content of the fourth fluorescent material relative to the total content of rare earth aluminate fluorescent materials may be selected to correspond to the target correlated color temperature of the light-emitting device. For example, in the case where the light-emitting device emitting light having a correlated color temperature in the range of 4,750 K or more and 7,000 K or less is to be achieved, the content of the fourth fluorescent material relative to the total content of rare earth aluminate fluorescent materials is preferably in the range of 0.35 or more and 0.7 or less, and more preferably in the range of 0.4 or more and 0.65 or less, from the point of view of luminous flux and color rendering property. In the case where the light-emitting device emitting light having a correlated color temperature in the range of 2,500 K or more and Petition 870260047189, dated 05 / 18 / 2026, p. 22 / 55 / 30 4,750 K or less should be achieved, the content of the fourth fluorescent material in relation to the total content of rare earth aluminate fluorescent materials is preferably in a range of 0.7 or more and 1.3 or less, and more preferably in a range of 0.75 or more and 1.2 or less, from the point of view of luminous flux and color rendering property.

[0038] The content of the fourth fluorescent material relative to the total content of rare earth aluminate fluorescent materials, the fourth fluorescent material and the fifth fluorescent material (which may hereafter be referred to as a “total fluorescent material content”) may be selected corresponding to the target correlated color temperature of the light-emitting device. For example, in the case where the light-emitting device emitting light having a correlated color temperature in a range of 4,750 K or more and 7,000 K or less is to be achieved, the content of the fourth fluorescent material relative to the total fluorescent material content is preferably in a range of 0.25 or more and 0.45 or less, and more preferably in a range of 0.27 or more and 0.4 or less, from the point of view of luminous flux and color rendering property. In the case where the light-emitting device emitting light having a correlated color temperature in a range of 2.If a light output of 500 K or more and 4,750 K or less must be achieved, the content of the fourth fluorescent material in relation to the total content of fluorescent material is preferably in a range of 0.4 or more and 0.6 or less, and more preferably in a range of 0.4 or more and 0.55 or less, from the point of view of luminous flux and color rendering properties.

[0039] The total content of rare earth aluminate fluorescent materials relative to the total content of fluorescent material can be selected to match the target correlated color temperature of the light-emitting device. For example, in the case where the light-emitting device emits light having a correlated color temperature in a range of Petition 870260047189, dated 05 / 18 / 2026, page 23 / 55 / ​​30 If a color temperature of 4,750 K or more and 7,000 K or less is to be achieved, the total content of rare earth aluminate fluorescent materials relative to the total content of fluorescent material is preferably in a range of 0.5 or more and 0.75 or less, and more preferably in a range of 0.55 or more and 0.7 or less, from the point of view of luminous flux and color rendering properties. In the case where the light-emitting device emitting light having a correlated color temperature in a range of 2,500 K or more and 4,750 K or less is to be achieved, the total content of rare earth aluminate fluorescent materials relative to the total content of fluorescent material is preferably in a range of 0.4 or more and 0.6 or less, and more preferably in a range of 0.4 or more and 0.55 or less, from the point of view of luminous flux and color rendering properties.

[0040] The total content of the fourth fluorescent material and the fifth fluorescent material (hereinafter, the fourth fluorescent material and the fifth fluorescent material may be collectively referred to as “red light-emitting fluorescent materials”) relative to the total fluorescent material content may be selected corresponding to the target correlated color temperature of the light-emitting device. For example, in the case where the light-emitting device emitting light having a correlated color temperature in a range of 4,750 K or more and 7,000 K or less is to be achieved, the content is preferably in a range of 0.25 or more and 0.5 or less, and more preferably in a range of 0.3 or more and 0.45 or less, from the point of view of luminous flux and color rendering property. In the case where the light-emitting device emitting light having a correlated color temperature in a range of 2,500 K or more and 4,000 K or less, the content may be selected corresponding to the target correlated color temperature of the light-emitting device.If a temperature of 750 K or less is achieved, the content of red light-emitting fluorescent materials to the total fluorescent material content is preferably in a range of 0.4 or more and 0.6 or less, and more preferably in a range of 0.45 or more and 0.55 or less, from the point of... Petition 870260047189, dated 05 / 18 / 2026, page 24 / 55 / ​​30 regarding luminous flux and color rendering properties. Rare Earth Aluminate Fluorescent Materials

[0041] Rare earth aluminate fluorescent materials include at least one type of the first fluorescent material, second fluorescent material and third fluorescent material described below and include two or more types of fluorescent materials.

[0042] The first fluorescent material is a fluorescent material that is activated with trivalent cerium and has a composition represented by the following formula (I). Y3(Al,Ga>O12:Ce (I)

[0043] The peak wavelength of light emission of the first fluorescent material is preferably in a range of 520 nm or more and 550 nm or less. The full width at half the maximum of the first fluorescent material is preferably in a range of 95 nm or more and 120 nm or less.

[0044] The second fluorescent material is a fluorescent material that is activated with trivalent cerium and has a composition represented by the following formula (II). Lu3Al5O12:Ce (II)

[0045] The peak wavelength of light emission of the second fluorescent material is preferably in a range of 500 nm or more and 545 nm or less. The full width at half the maximum of the second fluorescent material is preferably in a range of 95 nm or more and 105 nm or less.

[0046] The third fluorescent material is a fluorescent material that is activated with trivalent cerium and has a composition represented by the following formula (III). Y3Al5O12:Ce (III)

[0047] The peak wavelength of light emission of the third Petition 870260047189, dated 05 / 18 / 2026, p. 25 / 55 / 30: The fluorescent material is preferably in a range of 535 nm or more and 555 nm or less. The full width at half the maximum of the third fluorescent material is preferably in a range of 100 nm or more and 120 nm or less.

[0048] The maximum excitation wavelength of rare earth aluminate fluorescent materials is preferably in a range of 220 nm or more and 490 nm or less, more preferably in a range of 430 nm or more and 470 nm or less, and even more preferably in a range of 440 nm or more and 460 nm or less, considering the light emission efficiency.

[0049] The average particle diameter of rare earth aluminate fluorescent materials may be in a range, for example, of 5 μm or more and 30 μm or less, and is preferably in a range of 20 μm or more and 25 μm or less, in consideration of enhancing the light emission intensity and workability in the light-emitting device production process. Fluorescent Material Room

[0050] The fourth fluorescent material is a fluorinated fluorescent material having a composition represented by the following formula (IV), is activated with tetravalent manganese and emits red light. The fourth fluorescent material preferably has a peak emission wavelength in a range of 610 nm or more and 650 nm or less. A2[M11-pMn4+pF6] (IV)

[0051] In formula (IV), A includes at least one type of an element selected from the group consisting of K, Li, Na, Rb, Cs and NH4+, wherein A is preferably K, and M1 includes at least one type of an element selected from the group consisting of an element from Group 4, an element from Group 13 and an element from Group 14. M1 preferably includes at least one type of an element selected from the group that Petition 870260047189, dated 05 / 18 / 2026, p. 26 / 55 / 30 consists of silicon, aluminum, germanium, and titanium, and more preferably includes at least one type of an element selected from the group consisting of silicon and aluminum. p represents a number that satisfies 0 < p < 0.2.

[0052] The full width at half the maximum of the fourth fluorescent material in the light emission spectrum is preferably small and may be, for example, 10 nm or less. The maximum excitation wavelength of the fourth fluorescent material is preferably in a range of 430 nm or more and 470 nm or less, and more preferably in a range of 440 nm or more and 460 nm or less, considering the light emission efficiency.

[0053] The average particle diameter of the fluorescent materials may be in a range, for example, of 5 μm or more and 50 μm or less, and is preferably in a range of 10 μm or more and 30 μm or less, in consideration of enhancing the light emission intensity and workability in the light-emitting device production process.

[0054] The light-emitting device may include only one type of fluorescent room material or may include a combination of two or more types of fluorescent room materials having different compositions from each other. Fifth Fluorescent Material

[0055] The fifth fluorescent material is a nitride fluorescent material that has a composition represented by the following formula (V), is activated with divalent europium and emits red light. (Sr,Ca)AlSiWEu (V)

[0056] The fifth fluorescent material contains at least one type selected from the group consisting of Sr and Ca, preferably contains both Sr and Ca, and preferably has an Sr content in Sr and Ca of Petition 870260047189, dated 05 / 18 / 2026, page 27 / 55 / ​​30 0.8% by mole or more.

[0057] The peak wavelength of light emission of the fifth fluorescent material is preferably in a range of 600 nm or more and more preferably 615 nm or more. The peak wavelength of light emission of the fifth fluorescent material is preferably in a range of 630 nm or less and more preferably in a range of 620 nm or less. The peak wavelength of light emission of the fifth fluorescent material may be selected corresponding to the target correlated color temperature of the light-emitting device in consideration of the luminous flux and color rendering property. For example, in the case where the light-emitting device emitting light having a correlated color temperature in a range of 3,250 K or more and 7,000 K or less is to be achieved, the peak wavelength of light emission of the fifth fluorescent material is preferably in a range of 600 nm or more and 620 nm or less.In cases where the light-emitting device must achieve a color temperature correlated to 2,500 K or more and 3,250 K or less, the peak wavelength of the fifth fluorescent material is preferably in the range of 615 nm or more and 630 nm or less.

[0058] The full width at half the maximum of the fifth fluorescent material in the light emission spectrum may be, for example, 100 nm or less, and is preferably 80 nm or less, from the point of view of luminous flux and color rendering property. The maximum excitation wavelength of the fifth fluorescent material is preferably in a range of 220 nm or more and 490 nm or less, more preferably in a range of 430 nm or more and 470 nm or less, and even more preferably in a range of 440 nm or more and 460 nm or less, considering the light emission efficiency.

[0059] The average particle diameter of the fifth materials Petition 870260047189, dated 05 / 18 / 2026, p. 28 / 55 / 30 fluorescent lamps may be in a range, for example, of 5 μm or more and 30 μm or less, and is preferably in a range of 10 μm or more and 20 μm or less, in consideration of enhancing the light emission intensity and workability in the light-emitting device production process.

[0060] The light-emitting device may include only one type of fifth fluorescent material or may include a combination of two or more types of fifth fluorescent materials having different compositions from each other. Light Emission Spectrum of the Light Emitting Device

[0061] The light emission spectrum of the light-emitting device equipped with the fluorescent member including the aforementioned fluorescent materials is shown by the spectral distribution with wavelength as the abscissa and light emission intensity as the ordinate. In the light emission spectrum of the light-emitting device, the ratio of the peak light emission intensity of the fourth fluorescent material to the peak light emission intensity of the light-emitting element can be selected corresponding to the target correlated color temperature of the light-emitting device. For example, in the case where the light-emitting device emits light having a correlated color temperature in a range of 4,750 K or more and 7.If a color temperature of 000 K or less is to be achieved, the ratio of the peak light emission intensity of the fluorescent material to the peak light emission intensity of the light-emitting element is preferably in the range of 1.0 or more and 2.0 or less, and more preferably in the range of 1.1 or more and 1.9 or less, from the point of view of luminous flux and color rendering properties. In the case where the light-emitting device emitting light having a correlated color temperature in the range of 3,750 K or more and 4,750 K or less is to be achieved, the ratio of... Petition 870260047189, dated 05 / 18 / 2026, page 29 / 55 / ​​30 The peak light emission intensity of the fluorescent material in relation to the peak light emission intensity of the light-emitting element is preferably in a range of 2.0 or more and 3.5 or less, and more preferably in a range of 2.5 or more and 3.0 or less, from the point of view of luminous flux and color rendering properties. In cases where the light-emitting device emitting light having a correlated color temperature in the range of 2,850 K or more and 3,750 K or less is to be achieved, the ratio of the peak light emission intensity of the fluorescent material to the peak light emission intensity of the light-emitting element is preferably in the range of 3.5 or more and 5.5 or less, and more preferably in the range of 4.0 or more and 5.2 or less, from the point of view of luminous flux and color rendering properties.In cases where the light-emitting device emitting light having a correlated color temperature in the range of 2,500 K or more and 2,850 K or less is to be achieved, the ratio of the peak light emission intensity of the fluorescent material to the peak light emission intensity of the light-emitting element is preferably in the range of 5.5 or more and 7.0 or less, and more preferably in the range of 6.0 or more and 6.5 or less, from the point of view of luminous flux and color rendering properties. Additional Fluorescent Material

[0062] The light-emitting device may include additional fluorescent material other than the first fluorescent material through the fifth fluorescent material as needed. Examples of additional fluorescent material include (Sr,Ba,Ca)w(PO4MBr,Cl)2:Eu, (Y,Gd,Tb,LuXAl,Ga)sO12:Ce (provided that the compositions of the first through third fluorescent materials are excluded), Ca3Sc2Si3O12:Ce, CaSc2O4:Ce, (La,Y>Si6Nn:Ce, (Ca,Sr,Ba>Si6O9N4:Eu, Petition 870260047189, dated 05 / 18 / 2026, page 30 / 55 / ​​30 (Ca,Sr,Ba)3Si6Oi2N2:Eu, (Ba,Sr,Ca)Si2U2N2:Eu, (Ca,Sr,Ba)2Si5N8:Eu, (Ca,Sr,Ba)S:Eu and (Ba,Sr,Ca)Ga2S4:Eu. In the case where the light-emitting device includes additional fluorescent material, its content may be appropriately regulated to provide particular light-emitting characteristics.

[0063] The fluorescent materials used may be commercially available fluorescent materials, and the fourth fluorescent material may be produced with reference to the production methods described in Japanese Patent Application No. 2014-202266 and Japanese Patent Application No. 2020-212532 filed by the present Applicant. The additional fluorescent material may be produced, for example, in the following manner. An elemental substance, an oxide, a carbonate, a nitride, a chloride, a fluoride, a sulfide, and the like of the elements contained in the composition of the fluorescent material are used as raw materials, and each raw material is weighed to make the prescribed compositional ratio. An additive, such as a flux, is appropriately added to the raw materials, which are mixed by a wet or dry method with a mixer. According to the procedure, the solid-state reaction may be facilitated to form particles having a uniform size.The mixer used can be a ball mill, generally used industrially, and in addition, a pulverizer, such as a vibratory mill, a roller mill, and a jet mill, can also be used. The raw materials can be pulverized with a pulverizer to increase the specific surface area. To regulate the specific surface area of ​​the resulting fluorescent material particles to a certain range, classification can be carried out with a wet classifier, such as a sedimentation tank, a hydrocyclone, and a centrifugal separator, and a dry classifier, such as a cyclone and an air separator, which are generally used industrially. The mixed raw material is loaded into a crucible formed by SiC₂. Petition 870260047189, dated 05 / 18 / 2026, page 31 / 55 / ​​30 quartz, alumina, BN or similar, and calcined in an inert atmosphere, such as argon or nitrogen, or in a reducing atmosphere containing hydrogen. Calcination is carried out at a prescribed temperature for a predetermined time. The calcined material is subjected to pulverization, dispersion, filtration and the like, in order to provide the powder with the target fluorescent material. Solid-liquid separation can be carried out by a method generally used industrially, such as filtration, suction filtration, pressure filtration, centrifugal separation and decantation. Drying can be carried out with an apparatus generally used industrially, such as a vacuum dryer, hot air dryer, conical dryer and rotary evaporator. Fluorescent Member

[0064] The light-emitting device includes the fluorescent member which includes, for example, fluorescent materials and a resin and covers the light-emitting element. Examples of the resin that constitutes the fluorescent member include a thermoplastic resin and a thermosetting resin. Specific examples of thermosetting resin include an epoxy resin, a silicone resin and a modified silicone resin, such as an epoxy-modified silicone resin.

[0065] The fluorescent member may include an additional component besides the fluorescent materials and the resin depending on the need. Examples of the additional component include a filler, such as silica, barium titanate, titanium oxide and aluminum oxide, a light stabilizer and a dye. In the case where the fluorescent member includes the additional component, its content is not particularly limited and can be selected depending on the purpose and the like. For example, in the case where a filler is contained as an additional component, the content can be from 0.01 to 20% by mass based on the resin. Lighting Fixture

[0066] It is sufficient that the lighting fixture includes at least one type Petition 870260047189, dated 05 / 18 / 2026, page 32 / 55 / 30 of the aforementioned light-emitting device. The lighting apparatus may include at least one type of the aforementioned light-emitting device and a known light-emitting device that emits mixed white light in combination. The lighting apparatus may further include, in addition to the light-emitting device, a reflector member, a protective member, an auxiliary device for supplying electrical power to the light-emitting device, and the like. The lighting apparatus may include a plurality of light-emitting devices. In the case where the lighting apparatus includes several light-emitting devices, the various light-emitting devices that are identical to each other may be provided, and the various light-emitting devices that differ in correlated color temperature from each other may be provided.A drive device can be provided to operate the various light-emitting devices individually, so as to allow adjustment of brightness and correlated color temperature as desired. The lighting fixture can be of any type such as direct mounting, recessed type, suspended type, and the like. EXAMPLES

[0067] Examples of the present invention will be specifically described below. (Fluorescent Material)

[0068] Before the production of light-emitting devices, the following fluorescent materials were prepared as fluorescent materials used in Examples and Comparative Examples. Y3(Al,Ga>O12:Ce (I) Lu3Al5O12:Ce (II) Y3Al5O12:Ce (III) A2[M11-pMn4+pF6] (IV) (where in formula (IV), A represents K, M1 represents Si and p Petition 870260047189, dated 05 / 18 / 2026, p. 33 / 55 / ​​​​30 represents a number that satisfies 0 < p < 0.2) (Sr,Ca)AlSiN3:Eu (V)

[0069] As the first fluorescent material, a rare earth aluminate fluorescent material having a composition represented by formula (I), a peak light emission wavelength of 545 nm and a full width at half the maximum of 104.0 nm (which may be referred to hereafter as “GYAG1”) and a rare earth aluminate fluorescent material having a composition represented by formula (I), a peak light emission wavelength of 533 nm and a full width at half the maximum of 107.0 nm (which may be referred to hereafter as “GYAG2”) were prepared.

[0070] As the second fluorescent material, a rare earth aluminate fluorescent material having a composition represented by formula (II), a peak light emission wavelength of 533 nm and a full width at half maximum of 100.5 nm (which may henceforth be referred to as “LAG”) was prepared.

[0071] As the third fluorescent material, a rare earth aluminate fluorescent material having a composition represented by formula (II), a peak light emission wavelength of 545 nm and a full width at half maximum of 109.5 nm (which may henceforth be referred to as “YAG”) was prepared.

[0072] As the fourth fluorescent material, a fluorescent fluorine material having a composition represented by formula (IV), a peak emission wavelength of light of 630 nm and a full width at half maximum of 14 nm, emitting red light (which may henceforth be referred to as “KSF”) was prepared.

[0073] As the fifth fluorescent material, a nitride fluorescent material having a composition represented by the formula (V), a peak light emission wavelength in a range of 600 nm or Petition 870260047189, dated 05 / 18 / 2026, page 34 / 55 / ​​30 plus and 630 nm or less and a full width at half the maximum of 80 nm, emitting red light (which may be referred to hereafter as “SCASN”) was prepared.

[0074] As the fluorescent material used in the light-emitting devices of the Comparative Examples, a chlorosilicate fluorescent material having a composition represented by the following formula (VI), a peak light emission wavelength of 521 nm and a full width at half maximum of 63 nm was prepared. Ca8MgSi4O16Cl2:Eu (VI)

[0075] The peak wavelengths of light emission and full widths at half maximum of the fluorescent materials described above can be regulated by altering the production conditions, compositions, and the like of the fluorescent materials.

[0076] As the light-emitting element, a gallium nitride-based semiconductor light-emitting element having a peak light emission wavelength of 450 nm was prepared. (Example 1) Production of Light Emitting Device

[0077] A light-emitting device was produced by combining the blue LED (light-emitting element) having a peak light emission wavelength of 450 nm, GYAG1 as the first fluorescent material and LAG as the second fluorescent material as rare earth aluminate fluorescent materials, KSF as the fourth fluorescent material, and SCASN as the fifth fluorescent material.

[0078] The fluorescent materials blended to form the content of fluorescent materials shown in Table 1 below, providing a correlated color temperature around 6,500 K, were added to a silicone resin and mixed and dispersed therein, and then the mixture was defoamed to provide a resin composition containing material Petition 870260047189, dated 05 / 18 / 2026, page 35 / 55 / ​​30 fluorescent. The resin composition containing fluorescent material was then injected and loaded into the light-emitting element, and the resin composition was cured by heating. A light-emitting device was produced in this way. (Examples 2 to 6)

[0079] The light-emitting devices of Examples 2 to 6 were produced to provide a correlated color temperature around 2,700 K to 5,000 K in the same manner as in Example 1, except that the combination of two or more types of rare earth aluminate fluorescent materials containing at least one type selected from the group consisting of the first fluorescent material, the second fluorescent material and the third fluorescent material, the fourth fluorescent material and the fifth fluorescent material, and the content ratios of the fluorescent materials were altered to the values ​​shown in Table 1 below. Table 1 Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Aluminate fluorescent material LAG + LAG + GYAG2 + GYAG2 + LAG + LAG + rare earths Fluorescent material content ratio (%) GYAG1 GYAG1 YAG YAG GYAG1 GYAG1 fourth fluorescent material content / total fluorescent material content Fluorescent material content ratio (%) 29.5 38.0 49.3 52.8 47.6 41.9 fourth fluorescent material content 0.43 0.63 1.03 1.19 0.97 0.76 / total rare earth aluminate fluorescent material content Peak light emission intensity fourth fluorescent material / light emitting element Fluorescent material content ratio (%) 1.20 1.89 3.00 4.01 5.19 6.35 total fluorescent material content Rare earth aluminate / total fluorescent material content Ratio of fluorescent material content (%) 68.9 60.0 48.1 44.4 49.0 55.4 Total content of red light emitting fluorescent materials / total fluorescent material content 31.1 40.0 51.9 55.6 51.0 44.6 x 0.312 0.345 0.384 0.407 0.434 0.457 Petition 870260047189, dated 05 / 18 / 2026, p. 36 / 55 / ​​​​30 y Correlated color temperature (K) 0.329 6532 0.356 0.379 4992 3921 0.392 0.403 3465 3023 0.409 2727

[0080] The light-emitting devices of Examples 1 to 6 were measured for the chromaticity coordinate, correlated color temperature (Tcp, K), average color rendering index (Ra (R1 to R8)), and special color rendering indices (R9 to R15) of the emitted light. Specifically, the light-emitting devices used in the Examples and Comparative Examples were measured for the chromaticity coordinate (x,y) in the chromaticity coordinate system of the CIE 1931 chromaticity diagram, luminous flux, and radiant flux (total spectral radiant flux) with a photometric system combining a spectral photometric analyzer (PMA-12, manufactured by Hamamatsu Photonics KK) and an integral sphere. The results for the chromaticity coordinate and correlated color temperature (Tcp, K) of the emitted light are shown in Table 1. The results for the color rendering indices are shown in Table 2 below.

[0081] The light emission spectra of the light-emitting devices of the Examples and Comparative Examples described below were measured with a spectrofluorometer. The ratios of peak light emission intensity of the peak light emission of the fourth fluorescent material to the peak light emission of the light-emitting element are shown in Table 1. Figures 2 to 7 show the light emission spectra of the light-emitting devices of Examples 1 to 6 with the spectra of the standard light sources. Table 2 Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Ra 94.6 95.4 93.9 94.6 95.1 95.9 R1 96.3 97.4 96.7 97.2 97.0 98.5 R2 94.9 95.7 94.0 95.2 97.8 99.3 R3 90.4 90.7 88.5 90.5 96.7 99.0 R4 96.0 96.7 95.1 95.6 97.0 98.9 R5 94.3 95.2 94.4 95.4 96.3 98.6 R6 90.2 91.8 90.8 93.2 96.3 94.8 R7 97.8 98.3 96.2 96.2 93.4 92.2 R8 97.2 97.6 95.0 93.4 86.5 85.6 R9 88.6 90.5 82.0 79.4 67.7 67.8 Petition 870260047189, dated 05 / 18 / 2026, page 37 / 55 / ​​30 R10 85.4 86.8 82.6 85.7 92.6 97.7 R11 94.2 94.7 93.6 94.6 97.5 96.3 R12 64.1 64.9 66.1 71.8 80.4 87.2 R13 96.1 97.0 95.6 96.2 97.2 99.1 R14 94.3 94.0 92.3 93.2 96.7 98.0 R15 95.6 96.0 96.0 95.5 93.2 93.6 (Comparative Example 1)

[0082] A light-emitting device was produced to provide a correlated color temperature around 6,500 K in the same manner as in Example 1, except that the fourth fluorescent material was not used, but a combination of the fluorescent material chlorosilicate having a composition represented by formula (VI ) and a peak light emission wavelength of 521 nm, the first fluorescent material GYAG2 and the fifth fluorescent material SCASN were used as the fluorescent material, and the contents of the fluorescent materials were allowed to be the values ​​shown in Table 3 below. (Comparative Examples 2 to 6)

[0083] The light-emitting devices in Comparative Examples 6 were produced to provide a correlated color temperature of around 2,700 K to 5,000 K in the same way as in Example Comparison 1, except that the quantities of fluorescent materials have been altered to make the content ratios of fluorescent materials shown in Table 3 below. Table 3 Example Example Example Example Example Example Comparative Comparison Comparative Comparison Comparative Comparison 1 2 3 4 5 6 Fluorescent material of GYAG2 + GYAG2 + GYAG2 + GYAG2 + GYAG2 + GYAG2 + aluminate of rare earths. Ratio of fluorescent material content (%) of the fourth material content. 93.0 92.5 92.1 91.8 91.6 89.4 fluorescent / total fluorescent material content Petition 870260047189, dated 05 / 18 / 2026, page 38 / 55 / ​​30 Ratio of fluorescent material content (%) total content Fluorescent materials 7.0 7.5 7.9 8.2 8.4 10.6 Red light emitters / total fluorescent material content x 0.312 0.345 0.384 0.407 0.434 0.457 y 0.329 0.356 0.379 0.392 0.403 0.409 Correlated color temperature 6500 5000 4000 3500 3000 2700 (K)

[0084] The light-emitting devices from Comparative Examples 6 were measured for the chromaticity coordinate of the light-emitting devices in the same way as the light-emitting devices from the Examples and shown in Table 3, and the results of the color rendering indices are shown in Table 4 below. Table 4 Example Example Example Example Example Example Comparison 1 Comparison 2 Comparison 3 Comparison 4 Comparison 5 Comparison 6 Ra 95.7 94.7 94.3 91.6 94.6 94.6 R1 96.6 95.8 96.2 92.9 96.9 96.9 R2 98.8 97.0 96.8 94.3 98.4 98.4 R3 97.5 97.7 96.5 94.9 98.8 98.8 R4 98.7 96.8 96.6 93.9 97.5 97.5 R5 95.7 94.5 95.5 92.0 97.6 97.6 R6 93.7 94.4 94.4 92.6 96.0 96.0 R7 94.5 94.1 93.7 92.4 91.1 91.1 R8 89.8 84.8 85.0 80.1 80.5 80.5 R9 73.4 58.5 60.7 49.2 55.1 55.1 R10 97.5 92.3 91.7 85.5 96.8 96.8 R11 94.6 96.0 94.9 94.5 93.5 93.5 R12 66.8 66.3 72.6 70.4 85.7 85.7 R13 98.4 96.9 97.0 93.5 98.0 98.0 R14 98.3 98.5 97.7 96.5 99.2 99.2 R15 95.0 90.5 91.7 87.3 89.9 89.9

[0085] As shown in Tables 2 and 4, in the comparison in Ra and R15 of the light-emitting devices in the Examples and Comparative Examples, having substantially the same correlated color temperature, approximately equivalent values ​​were obtained in the Examples and Comparative Examples for Ra. For R15, on the other hand, higher values ​​were obtained in the light-emitting devices of the Examples than in the Comparative Examples at their respective temperatures. Petition 870260047189, dated 05 / 18 / 2026, page 39 / 55 / ​​30 correlated colors, from which it was understood that the light-emitting devices of the Examples had a higher color rendering property than the light-emitting devices of the Comparative Examples in the specific color rendering index.In comparing the light-emitting devices from the Examples and the light-emitting devices from the Comparative Examples, having substantially the same correlated color temperature, and assuming that the luminous fluxes of the light-emitting devices from the Comparative Examples were each 100%, the relative luminous fluxes of the light-emitting devices from the Examples were 108.6% for the light-emitting device from Example 1, 111.2% for the light-emitting device from Example 2, 115.5% for the light-emitting device from Example 3, 117.7% for the light-emitting device from Example 4, 114.0% for the light-emitting device from Example 5, and 111.8% for Example 6. A higher luminous flux was obtained in any of the light-emitting devices from the Examples.

[0086] It was understood from the above that the light-emitting devices in the Examples each had a higher luminous flux and a higher color rendering property.

[0087] Figures 2 to 7 each show the light emission spectrum of each of the light-emitting devices in Examples 1 to 6 and Comparative Examples 1 to 6, and the spectrum of the standard light source for each of the correlated color temperatures. The light-emitting devices in Examples 1 to 6 emitted light having correlated color temperatures close to 6,500 K, 5,000 K, 4,000 K, 3,500 K, 3,000 K, and 2,700 K, respectively. In the light-emitting devices of Examples 1 to 3 that emit light having correlated color temperatures close to 6,500 K, 5,000 K, and 4,000 K, respectively, the blue-violet to blue light emission spectrum in a range of 430 nm or more and 470 nm or less was suppressed. Petition 870260047189, dated 05 / 18 / 2026, page 40 / 55 / ​​30 to make an intensity especially high, and the light emission spectra were approximated to the light emission spectra of the standard light sources, respectively. In the light-emitting devices of Examples 4 to 6 that emit light having correlated color temperatures close to 3,500 K, 3,000 K and 2,700 K, respectively, the light emission spectrum from blue-violet to blue color was suppressed from becoming an especially high intensity, and the intensity of the light emission spectrum in a wavelength range from yellow to green color, that is, a wavelength range from 495 nm to 584 nm according to JIS Z8110, did not become greater than the intensity of the light emission spectrum of the standard light source, resulting in greater approximation to the standard light source. INDUSTRIAL APPLICABILITY

[0088] The light-emitting device of the present description can be applied to lighting equipment with excellent light-emitting characteristics, an LED display, a camera flashlight, and the like. In particular, the light-emitting device can be favorably applied to lighting equipment and a light source that are required to achieve a high luminous flux and a high color rendering property. Furthermore, the light-emitting device can be used as a lighting apparatus, including the light-emitting device. EXPLANATIONS OF LETTERS OR NUMBERS

[0089] 10: Light-emitting element, 50: Fluorescent member, 70: Fluorescent material, 71, 72: First to third fluorescent material, 73: Fourth fluorescent material, 74: Fifth fluorescent material, 100: Light-emitting device Petition 870260047189, dated 05 / 18 / 2026, page 41 / 55

Claims

1 / 4 CLAIMS 1. Light-emitting device, characterized in that it comprises a light-emitting element having a peak emission wavelength in a range of 430 nm or more and 470 nm or less, and a fluorescent member including two or more types of rare-earth aluminate fluorescent materials, including at least one type selected from the group consisting of a first fluorescent material having a composition represented by the following formula (I), a second fluorescent material having a composition represented by the following formula (II), and a third fluorescent material having a composition represented by the following formula (III), a fourth fluorescent material having a composition represented by the following formula (IV), and a fifth fluorescent material having a composition represented by the following formula (V): Y3(Al,Ga)5O12:Ce (I) LusAl5O12:Ce (II) YsAl5O12:Ce (III) A2[M11-pMn4+pF6] (IV) (Sr,Ca)AlSiNs:Eu (V) wherein in formula (IV), A includes at least one type selected from the group consisting of K, Li, Na, Rb, Cs and NH4+, M1 includes at least one type of an element selected from the group consisting of an element from Group 4, an element from Group 13 and an element from Group 14, ep represents a number that satisfies 0 < p < 0.2, wherein the light-emitting device has a content of the fourth fluorescent material relative to the total content of the rare earth fluorescent materials in a range of 0.35 or more and 0.7 or less, and emits light having a correlated color temperature in a range of 4,750 K or more and 7,000 K or less.

2. Light-emitting device according to claim 1, characterized in that the light-emitting device has a content of the fourth fluorescent material relative to the total content of rare earth aluminate fluorescent materials, of the fourth fluorescent material and the fifth fluorescent material in a range of 0.25 or more and 0.45 or less, and emits light having a correlated color temperature in a range of 4,750 K or more and 7,000 K or less.

3. Light-emitting device according to claim 1, characterized in that the light-emitting device has a total content of rare earth aluminate fluorescent materials relative to the total content of rare earth aluminate fluorescent materials, of the fourth fluorescent material and of the fifth fluorescent material in a range of 0.5 or more and 0.75 or less, and emits light having a correlated color temperature in a range of 4,750 K or more and 7,000 K or less.

4. Light-emitting device according to claim 1, characterized in that the light-emitting device has a total content of the fourth fluorescent material and the fifth fluorescent material relative to the total content of rare earth aluminate fluorescent materials, of the fourth fluorescent material and the fifth fluorescent material in a range of 0.25 or more and 0.5 or less, and emits light having a correlated color temperature in a range of 4,750 K or more and 7,000 K or less.

5. Light-emitting device according to claim 1, characterized in that the light-emitting device has a light emission spectrum having a peak light emission intensity ratio of a peak light emission of the fluorescent material to a peak light emission of the light-emitting element in a range of 1.0 or more and 2.0 or less and emits light having a correlated color temperature in a range of 4,750 K or more and 7,000 K or less.

6. Light-emitting device according to any one of claims 1 to 5, characterized in that the light-emitting element has a peak light emission wavelength in a range of 440 nm or more and 460 nm or less.

7. Light-emitting device according to any one of claims 1 to 6, characterized in that the first fluorescent material has a peak light emission wavelength in a range of 520 nm or more and 550 nm or less and a full width at half the maximum in a range of 95 nm or more and 120 nm or less.

8. Light-emitting device according to any one of claims 1 to 7, characterized in that the second fluorescent material has a peak light emission wavelength in a range of 500 nm or more and 545 nm or less and a full width at half the maximum in a range of 95 nm or more and 105 nm or less.

9. Light-emitting device according to any one of claims 1 to 8, characterized in that the third fluorescent material has a peak light emission wavelength in a range of 535 nm or more and 555 nm or less and a full width at half the maximum in a range of 100 nm or more and 120 nm or less.

10. Light-emitting device according to any one of claims 1 to 9, characterized in that the fifth fluorescent material has a peak light emission wavelength in a range of 600 nm or more and 630 nm or less and a full width in the half maximum of 80 nm or less.

11. Light-emitting device according to any one of claims 1 to 10, characterized in that the light-emitting device has an average color rendering index Ra of 90 or more or a special color rendering index R15 of 85 or more.

12. Lighting apparatus, characterized in that it comprises the light-emitting device as defined in any one of claims 1 to 11. Petition 870260047189, dated 05 / 18 / 2026, pp. 45 / 55

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