KR102654335B1 - Light emitting device package - Google Patents

Abstract

A light emitting device package according to an embodiment of the present invention includes a light emitting device that emits light having a peak wavelength in the range of 410 nm to 430 nm, an encapsulant disposed on the light emitting device, and a phosphor composition disposed in the encapsulant, In the measurement spectrum of the light emitting device package, the intensity of energy in the first wavelength region of 460 nm to 500 nm of the measurement spectrum appears greater than the intensity of energy from the solar light source in the first wavelength region, making it possible to implement a light source similar to sunlight. .

Description

Light emitting device package {LIGHT EMITTING DEVICE PACKAGE}

The present invention relates to a light emitting device package, and more specifically, to a light emitting device package that has a spectrum similar to sunlight that helps with biological rhythm and induces vitamin A synthesis in the body.

Light-emitting devices containing compounds such as GaN and AlGaN have many advantages, such as having a wide and easily adjustable band gap energy, and can be used in a variety of ways, such as light-emitting devices, light-receiving devices, and various diodes.

In particular, light emitting devices such as light emitting diodes and laser diodes using nitride semiconductor materials can realize various colors such as red, green, blue, and ultraviolet rays through the development of thin film growth technology and device materials. By using fluorescent materials or combining colors, efficient white light can be realized, and compared to existing light sources such as fluorescent lights and incandescent lights, it has the advantages of low power consumption, semi-permanent lifespan, fast response speed, safety, and environmental friendliness.

In addition, when light-receiving devices such as photodetectors or solar cells are manufactured using nitride semiconductor materials, the development of device materials absorbs light in various wavelength ranges and generates photocurrent, thereby generating light in various wavelength ranges from gamma rays to radio wavelength ranges. Light can be used. In addition, it has the advantages of fast response speed, safety, environmental friendliness, and easy control of device materials, so it can be easily used in power control, ultra-high frequency circuits, or communication modules.

Therefore, semiconductor devices can replace the transmission module of optical communication means, the light emitting diode backlight that replaces the cold cathode fluorescence lamp (CCFL) that constitutes the backlight of LCD (Liquid Crystal Display) display devices, and fluorescent or incandescent light bulbs. Applications are expanding to white light-emitting diode lighting devices, automobile headlights, traffic lights, and sensors that detect gas or fire, and can also be expanded to high-frequency application circuits, other power control devices, and communication modules.

Meanwhile, the human eye contains rod cells that are responsible for night vision, and the rod cells contain rhodopsin, which is composed of opsin and retinal, a precursor of vitamin A. When a photochemical reaction occurs and retinal absorbs light, it is separated from the opsin and releases energy. The energy released during this rhodopsin decomposition process activates the opsin and excites the rod cells, and this stimulation is transmitted to the cerebrum through the optic nerve. It is transmitted and the time is established (see Figure 1).

Conventional light sources have a low luminous intensity in the region of 500 nm, which is the maximum absorption wavelength of retinal, which reduces rhodopsin decomposition efficiency, thereby increasing user eye fatigue. In addition, the average color rendering index (CRI) value, which is similar to sunlight, is low, and even though it has a high average color rendering index, the special color rendering index values R9 to R15 among the color rendering indexes in each spectral region are low, so the light is low. There was a problem where a sense of heterogeneity appeared.

The present invention was proposed to solve this problem.

The technical problem that the present invention aims to solve is that the luminous intensity in the 500 nm region of the spectrum of the light source is similar to sunlight (natural light), which can reduce eye fatigue, and the average color rendering index (Ra) and the The goal is to provide a light emitting device package similar to sunlight with individual color rendering indices (R1 to R15) of 95 or higher.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

A light emitting device package according to an embodiment of the present invention includes a light emitting device that emits light with a peak wavelength within the range of 410 nm to 430 nm, an encapsulant disposed on the light emitting device, and a phosphor composition disposed in the encapsulant. In the measurement spectrum of a device package, the energy intensity changes according to the change in power injected from the power supply unit to the light source module, and the intensity of the energy in the first wavelength region of 460 nm to 500 nm in the measurement spectrum is the sun in the first wavelength region. It is greater than the intensity of the light source energy.

The intensity of energy in the second wavelength range of 440 nm to 455 nm in the measurement spectrum may be 115% or less of the energy intensity of the solar light source in the second wavelength range.

The intensity of energy in the third wavelength range of 510 nm to 545 nm in the measurement spectrum may be more than 95% of the energy intensity of the solar light source in the third wavelength range.

The energy intensity of the fourth wavelength range of 590 nm to 630 nm of the measurement spectrum may be more than 95% of the energy intensity of the solar light source in the fourth wavelength range.

The phosphor composition includes a first phosphor having an emission center wavelength of 490 nm to 505 nm, a second phosphor having an emission center wavelength of 450 nm to 470 nm, and a third phosphor having an emission center wavelength of 580 nm to 670 nm. It includes, and may further include a fourth phosphor having an emission center wavelength of 515 nm or more and 530 nm or less, or a fifth phosphor having an emission center wavelength of 515 nm or more and 570 nm or less.

The first phosphor may include at least one of the phosphors represented by Formulas 1 to 3 below.

[Formula 1]

(Ba, Mg) _{3- a} Si _{6 - b} O _{3 .5- c} N _{8 .5-d} (Li, Cl, F, P) _{1- e} :Eu ^{2 +} _a

(In Formula 1, 0<a≤0.5, 0≤b≤5.0, 0≤c≤3.0, 0≤d≤3.0, 0.01≤e≤0.99)

[Formula 2]

(Ba, Mg, Ca, Sr) _{3- a} Si ₆ O ₃ N ₈ :Eu ^{2 +} _a

(In Formula 2, 0<a≤0.5)

[Formula 3]

(Ba, Mg, Ca, Sr) _{1- a} Si ₂ O ₂ N ₂ :Eu ^{2 +} _a

(In Formula 3, 0<a≤0.5)

The second phosphor may include a phosphor represented by the following formula (4).

[Formula 4]

(Sr, Ba, Ca) _{3- a} MgSi ₂ O ₈ :Eu ^{2 +} _a

(In Formula 4, 0<a≤0.5)

The third phosphor may include at least one of the phosphors represented by Formulas 5 to 8 below.

[Formula 5]

(Ca, Sr) _{1- x} AlSiN ₃ :Eu ^{2 +} _x

(In Formula 5, 0<x≤0.5)

[Formula 6]

Ca _{1 - x} AlSiN ₃ :Eu ^{2 +} _x

(In Formula 6, 0<x≤0.5)

[Formula 7]

Sr _{2 - x} Si ₅ N ₈ :Eu ^{2 +} _x

(In Formula 7, 0<x≤0.5)

[Formula 8]

(Ba, Sr) _{2- x} Si ₅ N ₈ :Eu ^{2 +} _x

(In Formula 8, 0<x≤0.5)

The fourth phosphor may include a phosphor represented by the following formula (9).

[Formula 9]

(Sr, Ba) _{2- a} MgSi ₂ O ₇ :Eu ^{2 +} _a

(In Formula 9, 0<a≤0.5)

The fifth phosphor may include at least one of the phosphors represented by Formulas 10 to 12 below.

[Formula 10]

(Lu, Y, Gd) _{3- x} (Al, Ga) ₅ O ₁₂ :Ce ^{3 +} _x

(In Formula 10, 0<x≤0.1)

[Formula 11]

(Y, Lu, Gd) _{3- x} (Al, Ga) ₅ O ₁₂ :Ce ^{3 +} _x

(In Formula 11, 0<x≤0.1)

[Formula 12]

La _{3 - x} Si ₆ N ₁₁ :Ce ^{3 +} _x

(In Formula 12, 0<x≤0.1)

A first phosphor of 1% to 5% by weight, a second phosphor of 30% to 40% by weight, and a third phosphor of 1% to 5% by weight based on a total of 100% by weight of the phosphor composition. And it may include 50% by weight or more and 65% by weight or less of the fourth phosphor.

A first phosphor of 10% to 20% by weight, a second phosphor of 70% to 85% by weight, and a third phosphor of 1% to 5% by weight based on a total of 100% by weight of the phosphor composition. And it may include 4% by weight or more and 10% by weight or less of the fifth phosphor.

The phosphor composition may be included in an amount of 30% by weight or more and 50% by weight or less based on a total of 100% by weight of the encapsulant.

The light emitting device package according to an embodiment of the present invention has a luminous intensity in the 460 nm to 500 nm wavelength range that is higher than that of a solar light source, thereby helping rhodopsin decomposition activity, thereby reducing eye fatigue.

In addition, in the color temperature range of 4000K or higher, the average color rendering index (Ra) and the individual color rendering index (R1 to R15) in each spectral region are both above 95, allowing light similar to sunlight to be expressed.

In addition, it can reduce eye damage and sleep disorders caused by light sources, and provide a light-emitting device package that improves and stabilizes biological rhythm, stabilizes the mind and body, soothes the skin, and has excellent pest control effects.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

Figure 1 is a diagram schematically showing the synthesis and decomposition process of rhodopsin according to photochemical reaction.
Figure 2 is a diagram showing the maximum absorption wavelength of rod cells and cone cells.
3A and 3B are diagrams schematically showing a cross section of a light emitting device package according to an embodiment of the present invention.
Figure 4 is a diagram showing the emission spectrum of Comparative Example 1 compared with the emission spectrum of a solar light source.
Figure 5 is a diagram showing the emission spectrum of Example 1 and Comparative Example 2 compared with the emission spectrum of a solar light source.
Figures 6 to 10 are diagrams showing the emission center wavelengths of the first to fifth phosphors, respectively.
Figures 11 and 12 are diagrams comparing the emission spectra of Example 1 and Example 2 with the emission spectrum of a solar light source, respectively.
Figure 13 is a diagram showing the emission spectrum of Comparative Example 3.

Hereinafter, details regarding the above-described purpose and technical configuration of the present invention and its operational effects will be more clearly understood through the detailed description below.

In the description of the present invention, terms such as first, second, etc. used hereinafter are merely identifiers to distinguish the same or corresponding components, and the same or corresponding components are referred to as first, second, etc. It is not limited by .

Singular expressions include plural expressions unless the context clearly dictates otherwise. Terms such as “includes” or “has” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and include one or more other features, numbers, or steps. , operations, components, parts, or combinations thereof can be interpreted as being added.

As used hereinafter, “comprises” and/or “comprising” refers to the presence or absence of one or more other components, steps, operations and/or elements. Addition is not ruled out.

In the description of the present invention, each layer (film), region, pattern or structure is “on” or “under” the substrate, each layer (film), region, pad or pattern. The description of being formed in "includes being formed directly or through another layer. The standards for top/top or bottom/bottom of each floor are explained based on the drawing.

Hereinafter, a light emitting device package according to an embodiment of the present invention will be described in detail with reference to the attached drawings.

FIG. 3A is a cross-sectional view of a light-emitting device package 100 according to an embodiment of the present invention, and FIG. 3B is a cross-sectional view of a light-emitting device package 200 according to another embodiment of the present invention.

Referring to FIGS. 3A and 3B, the light emitting device package 100, 200 according to an embodiment of the present invention includes a body 11, a first lead frame 21, a second lead frame 23, and emits blue light. Energy intensity that changes depending on the change in power injected from the power supply unit of the light-emitting device package 100, 200, including the light-emitting device 25 and the encapsulant 41, to the light source module, and ranges from 460 nm to 460 nm in the emission spectrum. The luminescence intensity in the first wavelength range of 500 nm is the maximum absorption wavelength range of rod cells, and is higher than the luminescence intensity of a solar light source in the same wavelength range under the condition of being measured in a wavelength range that helps improve and stabilize biorhythms. big.

Figure 4 shows the emission spectrum of Comparative Example 1 (LED 5630 PKG, LG Innotek), which is a conventional light source. Referring to Figure 4, the emission intensity of the conventional light source in the first wavelength region is significantly lower than that of the solar light source, and rhodopsin Since the decomposition reaction does not occur actively, there is a problem of increasing the fatigue of the user's eyes, and the special color rendering index R9 to R15 values are low, so the color rendering property is lowered, making it difficult to express light similar to sunlight.

FIG. 5 is a diagram showing the emission spectrum of Comparative Example 2 (Sunlike, Seoul Semiconductor), which is another conventional light source similar to sunlight, a light emitting device package 100 according to an embodiment of the present invention, and a solar light source.

Referring to FIG. 5, the luminescence intensity of Comparative Example 2 in the first wavelength range of 460 nm to 500 nm appears to be relatively closer to sunlight than Comparative Example 1 shown in FIG. 4, but is still irradiated to sunlight. It shows a significantly lower luminous intensity compared to

On the other hand, the light emitting device package (100, 200) according to an embodiment of the present invention not only has a light emission intensity similar to that of a solar light source in the visible light wavelength range of 500 nm to 640 nm, but also has a light emission intensity similar to that of a solar light source. Unlike Example 2, the light emission intensity in the first wavelength region is also similar to sunlight, making it possible to express light more similar to sunlight than conventional light sources.

The first wavelength region is a region containing the maximum absorption wavelength region of rod cells. When the first wavelength region has a spectrum of similar or higher intensity to sunlight, the amount of energy supplied with the wavelength band required for the rhodopsin decomposition reaction increases. This can reduce user eye fatigue.

In addition, the first wavelength region is a wavelength that helps improve and stabilize biological rhythm, and the light emitting device packages 100 and 200 according to an embodiment of the present invention have a light emission intensity in the first wavelength region similar to that of a solar light source. It appears higher and can help improve and stabilize biological rhythm.

Meanwhile, the second wavelength range, 440 nm to 455 nm, is a wavelength range that affects retinal damage, and can cause eye damage such as reduced vision, macular degeneration, and retinal disease, and can cause sleep disorders by disrupting biological rhythms. This is the wavelength range that can be used.

The light emitting device package (100, 200) according to an embodiment of the present invention has an energy intensity in the second wavelength region of 115% or less of the energy intensity of the solar light source, reducing problems causing eye damage and sleep disorders caused by the corresponding wavelength. You can do it.

In addition, the third wavelength region of 510 nm to 545 nm not only has the effect of soothing damaged skin or sensitive skin, but is also a wavelength region that helps stabilize the mind and body, and is a light emitting device package (100, 200) according to an embodiment of the present invention. ), the energy intensity in the third wavelength range is more than 95% of the energy intensity of the solar light source, providing excellent skin soothing and mental and physical stability effects. In addition, by improving the energy intensity of the third wavelength region, it can help green plant growth.

The fourth wavelength range of 590 nm to 630 nm is a wavelength range that pests avoid, and the light emission intensity in the fourth wavelength range of the light emitting device packages (100, 200) according to an embodiment of the present invention is 95% of the solar light source light intensity. Above, it has the advantage of having an excellent pest control effect.

Meanwhile, the light emitting device packages 100 and 200 according to an embodiment of the present invention will be described with reference to FIGS. 3A and 3B again.

Referring to FIGS. 3A and 3B, the light emitting device package 100, 200 according to an embodiment of the present invention includes a body 11, a first lead frame 21, a second lead frame 23, and emits blue light. It includes a light emitting device 25 and an encapsulating material 41.

The body 11 may include a resin-based insulating material, such as polyphthalamide (PPA). Additionally, the body 11 may secure a plurality of lead frames 21 and 23 and include a cavity through which the light emitting device 25 is exposed. The cavity may have a cup shape or a concave container shape, the side of the cavity may be vertical or inclined with respect to the bottom surface, and its size and shape may vary. The shape of the cavity when viewed from above may be circular, polygonal, oval, etc., and may also have curved edges. However, it is not limited to this, and the body 11 having various shapes can be used.

The first lead frame 21 and the second lead frame 23 may be disposed on the body 11. The lower portions of the first lead frame 21 and the second lead frame 23 may be exposed to the lower portion of the body 11 and may be mounted on a circuit board to receive power. A light emitting element 25 may be disposed on the first lead frame 21, which is electrically connected to the first lead frame 21 and the second lead frame 23 through a connection member 27.

The light emitting device 25 acts as an excitation light source of the phosphor composition 30, causing the phosphor composition 30 to emit light, and exhibits light emission intensity in the first wavelength region of the light emitting device package 100 similar to that of a solar light source. In order to display a color rendering index (R1 to R15) of 95 or more in each spectral region at a color temperature of 4000K or more, it is preferable to use something that emits blue light in a wavelength range of 410 nm or more to 430 nm or less.

When using a light-emitting device that emits UV rather than a light-emitting device (25) that emits blue light as the light-emitting device (25), the wavelength range of the phosphor composition (30) is changed due to a change in the wavelength used as the excitation light source of the phosphor. There is a problem that it is difficult to express light similar to sunlight because the intensity of light emission changes.

In this case, depending on the composition of the phosphor composition 30, the average color rendering index (Ra) at a color temperature of 4000K or more can be set to 95 or more, but a specific color rendering index (Ra) among the color rendering indexes for each spectral region, R1 to R15, for example, Since the value of the R11 or R12 area is significantly lower than 95, there is a problem in that it becomes difficult to express light similar to sunlight.

Therefore, it is preferable to use a light emitting element 25 that emits blue light in a wavelength range of 410 nm to 430 nm, and a light emitting element 25 that emits blue light in a wavelength range of 415 nm to 425 nm. It is more desirable.

The encapsulant 41 surrounds the light emitting element 25 and is disposed in the cavity, and includes a resin portion and a phosphor composition 30, and has a structure in which the phosphor composition 30 is dispersed within the resin portion. At this time, a thermosetting resin such as epoxy resin or silicone resin may be used as the resin part, and a ceramic material such as glass may be used.

In addition, the phosphor composition 30 included in the encapsulant 41 may be included in an amount of 30% by weight or more and 50% by weight or less based on 100% by weight of the encapsulant 41. When the phosphor composition 30 is included within this range, the phosphor composition 30 can be evenly dispersed within the encapsulant 41 without agglomerating together, and sufficient luminance can be achieved.

The phosphor composition 30 includes a first phosphor 31 having an emission center wavelength of 490 nm or more and 505 nm or less, a second phosphor 32 having an emission center wavelength of 450 nm or more and 470 nm or less, and an emission center wavelength of 580 nm or more. It includes a third phosphor 33 with an emission center wavelength of 515 nm or more and 530 nm or less, and a fifth phosphor 35 with an emission center wavelength of 515 nm or more and 570 nm or less. It can be included.

Referring to FIG. 6, the first phosphor 31 may be a phosphor that is excited by an excitation light source and emits light in a cyan region having a central emission wavelength of 490 nm or more and 505 nm or less. The first phosphor 31 may include at least one of the phosphors represented by Formulas 1 to 3 below.

[Formula 1]

(Ba, Mg) _{3- a} Si _{6 - b} O _{3 .5- c} N _{8 .5-d} (Li, Cl, F, P) _{1- e} :Eu ^{2 +} _a

(In Formula 1, 0<a≤0.5, 0≤b≤5.0, 0≤c≤3.0, 0≤d≤3.0, 0.01≤e≤0.99)

[Formula 2]

(Ba, Mg, Ca, Sr) _{3- a} Si ₆ O ₃ N ₈ :Eu ^{2 +} _a

(In Formula 2, 0<a≤0.5)

[Formula 3]

(Ba, Mg, Ca, Sr) _{1- a} Si ₂ O ₂ N ₂ :Eu ^{2 +} _a

(In Formula 3, 0<a≤0.5)

Referring to FIG. 7, the second phosphor 32 may be a phosphor that is excited by an excitation light source and emits light in the blue region having a central emission wavelength of 450 nm or more and 470 nm or less, and is represented by the following formula 4: It may contain a phosphor.

[Formula 4]

(Sr, Ba, Ca) _{3- a} MgSi ₂ O ₈ :Eu ^{2 +} _a

(In Formula 4, 0<a≤0.5)

Referring to FIG. 8, the third phosphor 33 may be a phosphor that is excited by an excitation light source and emits light in the red region with an emission center wavelength of 580 nm or more to 670 nm or less, and has the following formulas 5 to 670 nm. It may include at least one of the phosphors indicated by 8.

[Formula 5]

(Ca, Sr) _{1- x} AlSiN ₃ :Eu ^{2 +} _x

(In Formula 5, 0<x≤0.5)

[Formula 6]

Ca _{1 - x} AlSiN ₃ :Eu ^{2 +} _x

(In Formula 6, 0<x≤0.5)

[Formula 7]

Sr _{2 - x} Si ₅ N ₈ :Eu ^{2 +} _x

(In Formula 7, 0<x≤0.5)

[Formula 8]

(Ba, Sr) _{2- x} Si ₅ N ₈ :Eu ^{2 +} _x

(In Formula 8, 0<x≤0.5)

Referring to FIG. 9, the fourth phosphor 34 may be a phosphor that is excited by an excitation light source and emits light in the green region with a center emission wavelength of 515 nm or more to 530 nm or less, and is represented by the following formula 9: It may contain a phosphor.

[Formula 9]

(Sr, Ba) _{2- a} MgSi ₂ O ₇ :Eu ^{2 +} _a

(In Formula 9, 0<a≤0.5)

Referring to FIG. 10, the fifth phosphor 35 may be a phosphor that is excited by an excitation light source and emits light in the green region with an emission center wavelength of 515 nm or more to 570 nm or less, and has the following formulas 10 to 10: It may include at least one of the phosphors indicated by 12.

[Formula 10]

(Lu, Y, Gd) _{3- x} (Al, Ga) ₅ O ₁₂ :Ce ^{3 +} _x

(In Formula 10, 0<x≤0.1)

[Formula 11]

(Y, Lu, Gd) _{3- x} (Al, Ga) ₅ O ₁₂ :Ce ^{3 +} _x

(In Formula 11, 0<x≤0.1)

[Formula 12]

La _{3 - x} Si ₆ N ₁₁ :Ce ^{3 +} _x

(In Formula 12, 0<x≤0.1)

The light emitting device package (100, 200) according to an embodiment of the present invention includes the phosphor composition (30) as described above, thereby expressing light emission intensity similar to sunlight in the first wavelength region, and having a spectrum in the color temperature range of 4000K or more. The color rendering index for each region, R1 to R15, is all above 95, making it possible to express light similar to sunlight. Therefore, it has the advantage of significantly reducing the user's eye fatigue, protecting health, and providing physical, psychological, and visual benefits by providing light optimized for biorhythms.

However, when using the phosphor composition 30 as a phosphor that has a similar central wavelength as the first to fifth phosphors, but is expressed by a different chemical formula that is not represented by Formulas 1 to 12, the wavelength reabsorption and interference phenomenon of the phosphors may occur. As a result, the intensity of light emission in the first wavelength range is significantly lower than that of sunlight, or it is difficult to express the values of R1 to R15 above 95 in the color temperature range of 4000K or more, making it difficult to express light similar to sunlight. .

[Experiment Example 1]

The combination of phosphors included in the phosphor composition 30 was adjusted as shown in Table 1 below, the color rendering index for each spectral region in the color temperature range of 5000K was measured, and the results are listed in Table 2. Additionally, the emission spectra of Example 1, Example 2, Comparative Example 1, and Comparative Example 3 were measured and shown in Figures 4 and 11 to 13.

(Unit: weight%) first phosphor secondary phosphor Third phosphor Quaternary phosphor Fifth phosphor Example 1 3 37 3 57 - Example 2 14 76 2 - 8 Comparison example 1 - - 6 94 - Comparison example 3 7 - 13 80 - Comparison example 4 39 - 24 - 37 Comparison example 5 - 42 9 49 - Comparison example 6 - 68 13 - 19

Figures 11 and 12 show the emission spectra of Example 1 and Example 2, respectively. Referring to these, in the case of Examples 1 and 2, not only did the emission intensity appear similar to sunlight in the entire area, Since the intensity of light emission in the first wavelength region appears to be similar to that of sunlight, it can help with the rhodopsin decomposition reaction, thereby significantly reducing the user's eye fatigue, and realizing a light source helpful for biorhythms. It turned out that it was possible.

On the other hand, referring to FIG. 4 showing the emission spectrum of Comparative Example 1 and FIG. 13 showing the emission spectrum of Comparative Example 3, the emission intensity in the first wavelength region among the wavelength regions of these emission spectra was significantly lower than that of sunlight. , it was confirmed that it emits light that is not similar to sunlight.

division Example 1 Example 2 Comparison example 1 Comparison example 3 Comparison example 4 Comparison example 5 Comparison example 6 R1 98.9 98.2 80.9 98.5 98.1 97.8 97.9 R2 99.2 97.9 86.7 98.4 98.0 96.8 97.2 R3 98.2 98.8 92.0 95.3 96.2 92.4 93.5 R4 96.8 96.9 84.0 92.9 91.0 87.8 89.1 R5 99.0 98.2 82.8 97.5 97.3 97.4 97.1 R6 98.8 97.0 83.1 97.2 98.5 98.2 98.0 R7 97.2 96.4 85.7 95.6 95.1 98.1 97.5 R8 97.4 97.2 66.7 95.1 94.9 97.7 97.2 R9 95.0 95.7 4.8 92.0 82.1 81.3 80.3 R10 98.4 96.8 70.0 67.4 86.4 84.4 86.5 R11 97.2 97.9 85.0 90.6 97.5 96.4 95.9 R12 97.4 96.0 68.4 90.1 84.2 83.2 81.0 R13 99.2 97.6 81.9 99.2 99.0 98.4 99.0 R14 99.1 99.2 95.8 97.5 97.1 97.1 98.4 R15 98.1 98.7 74.2 97.7 97.0 97.4 96.9 Ra 98.2 98.2 82.7 96.3 96.1 95.8 95.9

Table 2 shows the results of measuring the color rendering index for each spectral region in the color temperature range of 5000K in Example 1, Example 2, Comparative Example 1, Comparative Example 3 to Comparative Example 6. Referring to Table 2, Examples In Examples 1 and 2, the color rendering index in each area was all 95 or higher, confirming that they produced light quite similar to sunlight.

On the other hand, in the case of Comparative Example 1, it can be seen that the color rendering index in each area is overall low, producing light that is significantly different from sunlight, and in the case of Comparative Examples 3 to 6, the Ra value is the average value of R1 to R8. appears to be above 95, but the color rendering index in the special region R9 to R12 appears low, and it can be confirmed that light is relatively similar to sunlight compared to Comparative Example 1, but still emits light that is different from sunlight.

Meanwhile, the phosphor composition 30 of the light emitting device package 100 according to an embodiment of the present invention includes a first phosphor 31, a second phosphor 32, a third phosphor 33, and a fourth phosphor 34. Includes. More specifically, based on a total of 100% by weight of the phosphor composition 30, the first phosphor 31 is present in an amount of 1% to 5% by weight, and the second phosphor 32 is comprised in an amount of 30% to 40% by weight, 1 It may include more than 5% by weight and less than 5% by weight of the third phosphor 33 and more than 50% by weight and less than 65% by weight of the fourth phosphor 34.

The phosphor composition 30 of the light emitting device package 200 according to another embodiment of the present invention includes a first phosphor 31, a second phosphor 32, a third phosphor 33, and a fifth phosphor 35. More specifically, based on a total of 100% by weight of the phosphor composition 30, 10% by weight or more to 20% by weight of the first phosphor 31, 70% by weight or more to 85% by weight of the second phosphor ( 32), it may include 1 wt% to 5 wt% of the third phosphor 33 and 4 wt% to 10 wt% of the fifth phosphor 35.

When the phosphor included in the phosphor composition 30 of the light emitting device package 100, 200 according to an embodiment of the present invention is contained within the above-described range, the light emission intensity in the first wavelength region is the same as the sun in the same wavelength region. It appears similar to the luminous intensity of the light source, and in the color temperature range of 4000K or higher, the color rendering index values for each spectral region are all high above 95, making it possible to create light similar to sunlight.

On the other hand, when phosphors are included beyond the above-mentioned range, the luminous intensity in the first wavelength region is significantly reduced due to wavelength reabsorption and interference of the phosphors, or some of the color rendering index values for each spectral region in the color temperature region of 4000K or higher are reduced. Since this appears to be significantly low and it is difficult to realize light similar to sunlight, it is preferable that it is included within the above-mentioned composition range.

[Experiment Example 2]

A light emitting device package containing the phosphor composition 30 having the composition of Example 3, Example 4, and Comparative Examples 7 to 14 in Table 3 below was manufactured, and the color rendering index for each spectral region in the 5000K color temperature region was measured. It is listed in Table 4 and Table 5.

(Unit: weight%) first phosphor secondary phosphor Third phosphor Quaternary phosphor Example 1 3.0 37.0 3.0 57.0 Example 3 3.0 31.5 3.0 62.5 Example 4 2.5 31.5 2.5 63.5 Comparison example 7 0.5 38.0 2.0 59.5 Comparison example 8 5.5 34.5 4.5 55.5 Comparison example 9 4.5 28.0 4.5 63.0 Comparison example 10 3.0 42.0 3.0 52.0 Comparison example 11 3.5 38.0 0.5 58.0 Comparison Example 12 4.0 36.0 7.0 53.0 Comparison example 13 5.0 42.0 5.0 48.0 Comparison example 14 1.5 30.0 1.5 67.0

division Example 1 Example 3 Example 4 Comparison example 7 Comparison example 8 Comparison example 9 R1 98.9 96.9 98.8 96.5 97.1 97.7 R2 99.2 97.8 96.2 98.1 97.2 97.1 R3 98.2 96.7 97.1 98.1 97.5 95.8 R4 96.8 95.4 95.0 93.2 97.8 92.0 R5 99.0 95.8 95.4 98.5 98.3 96.4 R6 98.8 95.1 95.7 95.8 96.8 83.1 R7 97.2 96.8 95.5 94.8 98.5 96.1 R8 97.4 96.2 95.4 96.3 97.1 95.2 R9 95.0 96.0 95.7 95.1 96.5 94.0 R10 98.4 95.1 95.7 94.1 98.4 89.2 R11 97.2 95.5 95.3 84.2 86.5 95.6 R12 97.4 95.0 95.0 85.0 84.4 74.2 R13 99.2 98.7 97.8 96.1 96.2 98.0 R14 99.1 98.0 98.8 97.5 96.5 97.5 R15 98.1 97.2 97.2 95.4 97.1 96.9 Ra 98.2 96.3 96.1 96.4 97.5 94.2

division Comparison example 10 Comparison example 11 Comparison Example 12 Comparison example 13 Comparison example 14 R1 97.2 97.1 97.5 98.4 98.7 R2 98.0 97.0 97.5 96.5 95.4 R3 96.3 96.6 96.8 97.7 97.2 R4 84.0 90.2 93.8 83.9 96.4 R5 97.1 98.1 94.0 98.2 84.5 R6 93.9 94.0 93.9 95.9 95.4 R7 97.2 93.2 92.9 97.2 97.1 R8 97.4 96.5 89.0 95.8 94.5 R9 93.0 83.0 95.2 96.0 93.5 R10 90.7 94.4 82.1 89.5 95.2 R11 81.9 84.2 94.2 79.2 97.2 R12 95.2 94.9 93.8 93.5 83.7 R13 97.1 97.6 95.4 94.9 96.4 R14 97.7 98.1 97.1 96.5 97.1 R15 98.0 98.8 97.2 94.2 98.2 Ra 95.1 95.3 94.4 95.5 94.9

Referring to Tables 4 and 5, which list the results of measuring the color rendering index for each spectral region in the 5000K color temperature region of Examples 1, 3, 4, and Comparative Examples 7 to 14, in the case of Examples , while the color rendering index was high at 95 or higher in all areas, in the case of comparative examples, the color rendering index was found to have a value of around 85 in one or more areas.

In particular, in the color rendering index measurement results of Example 1, Comparative Example 7, and Comparative Example 8, when the content of the first phosphor 31 is outside the range of 1% by weight to 5% by weight, the color rendering index of some areas rapidly decreases. It appears that

In addition, from the color rendering index measurement results of Example 1, Example 3, Comparative Example 9, and Comparative Example 10, when the content of the second phosphor 32 was in the range of 30% by weight to 40% by weight, the color rendering index for each region was 95. You can see what appears above.

In addition, from Example 1, Comparative Example 11, and Comparative Example 12, when the third phosphor 33 is included within the range of 1% by weight to 5% by weight, the color rendering index for each region is shown to be 95 or more, and Examples 1 and 12 From Example 4, Comparative Example 13, and Comparative Example 14, when the fourth phosphor 34 is included within the range of 50% by weight to 65% by weight, the color rendering index for each region appears to be 95 or more.

Therefore, when the phosphor composition 30 includes all of the first to fourth phosphors 31 to 34, the total phosphor composition 30 contains 1% by weight or more and 5% by weight or less of the first phosphor 31. , 30% by weight or more to 40% by weight of the second phosphor 32, 1% by weight or more to 5% by weight of the third phosphor 33, and 50% by weight or more to 65% by weight of the fourth phosphor 34. It can be confirmed that when included, the color rendering index does not deteriorate due to wavelength interference and reabsorption between phosphors, and a light source similar to sunlight can be implemented.

[Experiment Example 3]

A light emitting device package containing the phosphor composition 30 having the composition of Examples 5 to 9 and Comparative Examples 15 to 22 of Table 6 was manufactured, and the color rendering index for each spectral region was measured in the 5000K color temperature region, and the results were measured in Table 7. and are listed in Table 8.

(Unit: weight%) first phosphor secondary phosphor Third phosphor Fifth phosphor Example 2 14.0 76.0 2.0 8.0 Example 5 11.8 82.5 1.5 4.2 Example 6 18.0 75.7 1.5 4.8 Example 7 18.9 71.8 2.3 7.0 Example 8 12.0 76.0 3.5 8.5 Example 9 14.6 77.0 2.6 5.8 Comparison example 15 9.0 84.3 1.2 5.5 Comparison example 16 21.0 64.8 4.7 9.5 Comparison example 17 18.5 68.2 3.8 9.5 Comparison example 18 7.9 87.0 1.0 4.1 Comparison example 19 13.9 77.1 0.5 8.5 Comparative example 20 11.1 74.2 6.7 8.0 Comparison example 21 15.8 78.0 3.9 2.3 Comparative example 22 12.2 74.5 1.8 11.5

division Example 2 Example 5 Example 6 Example 7 Example 8 Example 9 Comparison example 15 R1 98.2 97.3 96.5 96.1 97.7 95.2 96.5 R2 97.9 96.9 97.1 96.8 97.1 97.2 97.9 R3 98.8 97.1 96.4 95.4 96.5 96.2 96.1 R4 96.9 97.6 97.9 95.0 95.4 98.2 96.8 R5 98.2 98.9 99.5 95.5 96.0 97.7 95.4 R6 97.0 96.6 95.3 96.1 95.2 98.2 96.4 R7 96.4 95.8 95.0 96.2 95.1 95.4 94.5 R8 97.2 96.5 95.2 95.2 95.1 97.6 96.1 R9 95.7 96.2 95.4 95.1 95.9 97.2 93.2 R10 96.8 95.0 95.0 95.2 95.2 98.1 98.0 R11 97.9 98.1 98.5 95.0 96.1 98.2 86.1 R12 96.0 95.5 96.5 96.2 95.1 97.2 84.1 R13 97.6 95.9 97.1 97.7 96.1 97.1 95.1 R14 99.2 97.1 95.0 97.1 97.9 98.2 97.2 R15 98.7 96.5 96.4 98.0 96.9 98.3 96.1 Ra 98.2 97.1 96.6 95.8 96.0 97.0 96.2

division Comparison example 16 Comparison example 17 Comparison example 18 Comparison example 19 Comparative example 20 Comparison example 21 Comparative example 22 R1 96.7 97.2 98.1 97.4 95.2 94.9 96.2 R2 96.9 98.1 97.4 96.5 96.3 97.8 94.2 R3 94.7 94.4 97.3 97 90.4 91.2 97.2 R4 94.6 84.1 97.1 96 94.2 97.8 94.2 R5 95.7 94.2 96.5 96.3 94.9 94.2 93.9 R6 94.7 93.7 95.4 97.1 95.8 94.2 95.1 R7 93.4 93.2 95.1 96.1 95.4 95.2 94.2 R8 94.7 93.7 97.1 97.2 96.2 96.7 97.1 R9 97.0 96.5 84.1 95.1 96.1 97.2 96.1 R10 98.2 94.1 94.2 84.2 83.5 96.1 97.2 R11 85.2 83.9 92.1 94.4 92.1 84.5 82.4 R12 83.2 94.9 93.4 95.2 97.7 97.2 98.2 R13 94.1 98.2 97.2 96.6 97.8 97.1 97.9 R14 97.1 97.9 96.9 97.1 99.1 97.2 99.2 R15 96.5 99 97.7 97.5 99.2 98.2 99.3 Ra 95.2 93.6 96.8 96.7 94.8 95.3 95.3

Referring to Tables 7 and 8, which list the results of measuring the color rendering index for each spectral region in the 5000K color temperature region of Examples 2, 5 to 9, and Comparative Examples 15 to 22, in the case of Examples , while the color rendering index was high at 95 or higher in all areas, in the case of comparative examples, the color rendering index was found to have a value of around 85 in one or more areas.

Referring to Example 5, Example 6, Comparative Example 15, and Comparative Example 16, it can be seen that when the content of the first phosphor 31 exceeds 10% by weight to 20% by weight, some color rendering indices appear low at around 85. .

In addition, referring to Examples 5, 7, Comparative Examples 17 and 18, when the content of the second phosphor 32 is included in the range of 70% by weight to 85% by weight, the color rendering index for each region is all 95 or more. It can be seen that it appears as

In addition, referring to Examples 6, 8, Comparative Examples 19 and 20, when the third phosphor 33 is included in the range of 1% to 5% by weight, the color rendering index for each region is all 95 or more. , and referring to Examples 8, 9, Comparative Examples 21 and 22, when the fifth phosphor 35 is included in the range of 4% to 10% by weight, the color rendering index for each region is all 95 or more. You can see that it appears as .

Therefore, in the case where the phosphor composition 30 includes all of the first to third phosphors 33 and the fifth phosphor 35, the first phosphor 31 is included in the entire phosphor composition 30. 10% by weight or more to 20% by weight or less, 70% by weight or more to 85% by weight of the second phosphor 32, 1% by weight or more to 5% by weight of the third phosphor 33, and 4% by weight of the fourth phosphor 34. It can be confirmed that when it is included in the range of % or more to 10% by weight or less, the color rendering index does not deteriorate due to wavelength interference and reabsorption between phosphors, and a light source similar to sunlight can be implemented.

Meanwhile, a plurality of light emitting device packages (100, 200) according to the present invention described above may be arrayed on a substrate, and may include a light guide plate, a prism sheet, which are optical members on the optical path of the light emitting device packages (100, 200). A diffusion sheet, etc. may be placed.

Additionally, it can be implemented as a light source device including the light emitting device packages 100 and 200 according to the present invention.

In addition, the light source device includes a light source module including a substrate and a light emitting device package (100, 200) according to the present invention, a heat sink that dissipates heat from the light source module, and a light source module that processes or converts an electrical signal provided from the outside. It may include a power supply unit that provides. For example, the light source device may include a lamp, headlamp, or streetlight. Additionally, the light source device according to the embodiment can be applied to various products that require output light.

In addition, the light source device includes a bottom cover, a reflector disposed on the bottom cover, a light emitting module that emits light and includes a semiconductor element, a light guide plate disposed in front of the reflector and guiding the light emitted from the light emitting module forward, An optical sheet including prism sheets disposed in front of the light guide plate, a display panel disposed in front of the optical sheet, an image signal output circuit connected to the display panel and supplying an image signal to the display panel, and disposed in front of the display panel. may include a color filter. Here, the bottom cover, reflector, light emitting module, light guide plate, and optical sheet may form a backlight unit.

As another example of a light source device, a headlamp includes a light emitting module including a light emitting element package disposed on a substrate, a reflector that reflects light emitted from the light emitting module in a certain direction, for example, forward, and a light that is reflected by the reflector. It may include a lens that refracts light forward, and a shade that blocks or reflects a portion of the light reflected by the reflector and heading to the lens to achieve a light distribution pattern desired by the designer.

The embodiment of the present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope of the technical spirit of the embodiment. It will be clear to those skilled in the art to which an embodiment belongs.

100, 200: Light emitting device package
11: body
21: first lead frame
23: second lead frame
25: Light emitting device
27: Connection member
30: Phosphor composition
31: first phosphor
32: second phosphor
33: Third phosphor
34: Fourth phosphor
35: Fifth phosphor
41: Encapsulation material

Claims (13)

A light emitting device that emits light having a peak wavelength within the range of 410 nm to 430 nm;
An encapsulant disposed on the light emitting device; and
A phosphor composition disposed within the encapsulant;
In the measurement spectrum of a light emitting device package containing,
The phosphor composition is,
A first phosphor having an emission center wavelength of 490 nm or more and 505 nm or less;
a second phosphor having an emission center wavelength of 450 nm or more and 470 nm or less; and
A third phosphor having an emission center wavelength of 580 nm or more and 670 nm or less;
Including,
a fourth phosphor having an emission center wavelength of 515 nm or more and 530 nm or less; or a fifth phosphor having an emission center wavelength of 515 nm or more and 570 nm or less;
Includes,
Energy intensity that changes according to the change in power injected from the power supply unit to the light source module, with the condition that the normalized intensity of the energy in the first wavelength region of 460 nm to 500 nm of the measurement spectrum is measured in the maximum absorption wavelength region of the rod cell. Greater than the normalized intensity of solar light source energy in the first wavelength region,
the normalized intensity of energy in a second wavelength range of 440 nm to 455 nm of the measurement spectrum is not more than 115% of the normalized energy intensity of the solar light source in the second wavelength range,
The normalized intensity of the energy in the third wavelength region of 510 nm to 545 nm of the measurement spectrum is at least 95% of the normalized energy intensity of the solar light source in the third wavelength range,
The normalized intensity of energy in the fourth wavelength range of 590 nm to 630 nm of the measurement spectrum is at least 95% of the normalized energy intensity of the solar light source in the fourth wavelength range,
In the color temperature range of 4000K or higher, the color rendering index value for each spectral region is between 95 and 100.
The result of measuring energy from a solar light source has a normalized energy intensity of 0.4 to 1.0, and the condition for measuring energy is a light emitting device package, characterized in that it is measured in a first wavelength region including the maximum absorption wavelength region of rod cells. . delete delete delete delete According to paragraph 1,
The first phosphor is a light emitting device package comprising at least one of the phosphors represented by the following formulas 1 to 3.
[Formula 1]
(Ba, Mg) _3-a Si _6-b O _3.5-c N _8.5-d (Li, Cl, F, P) _1-e :Eu ²⁺ _a
(In Formula 1, 0<a≤0.5, 0≤b≤5.0, 0≤c≤3.0, 0≤d≤3.0, 0.01≤e≤0.99)
[Formula 2]
(Ba, Mg, Ca, Sr) _3-a Si ₆ O ₃ N ₈ :Eu ²⁺ _a
(In Formula 2, 0<a≤0.5)
[Formula 3]
(Ba, Mg, Ca, Sr) _1-a Si ₂ O ₂ N ₂ :Eu ²⁺ _a
(In Formula 3, 0<a≤0.5) According to paragraph 1,
The second phosphor is a light emitting device package including a phosphor represented by the following formula (4).
[Formula 4]
(Sr, Ba, Ca) _3-a MgSi ₂ O ₈ :Eu ²⁺ _a
(In Formula 4, 0<a≤0.5) According to paragraph 1,
The third phosphor is a light emitting device package comprising at least one of the phosphors represented by the following formulas 5 to 8.
[Formula 5]
(Ca, Sr) _1-x AlSiN ₃ :Eu ²⁺ _x
(In Formula 5, 0<x≤0.5)
[Formula 6]
Ca _1-x AlSiN ₃ :Eu ²⁺ _x
(In Formula 6, 0<x≤0.5)
[Formula 7]
Sr _2-x Si ₅ N ₈ :Eu ²⁺ _x
(In Formula 7, 0<x≤0.5)
[Formula 8]
(Ba, Sr) _2-x Si ₅ N ₈ :Eu ²⁺ _x
(In Formula 8, 0<x≤0.5) According to paragraph 1,
The fourth phosphor is a light emitting device package including a phosphor represented by the following formula (9).
[Formula 9]
(Sr, Ba) _2-a MgSi ₂ O ₇ :Eu ²⁺ _a
(In Formula 9, 0<a≤0.5) According to paragraph 1,
The fifth phosphor is a light emitting device package comprising at least one of the phosphors represented by the following formulas 10 to 12.
[Formula 10]
(Lu, Y, Gd) _3-x (Al, Ga) ₅ O ₁₂ :Ce ³⁺ _x
(In Formula 10, 0<x≤0.1)
[Formula 11]
(Y, Lu, Gd) _3-x (Al, Ga) ₅ O ₁₂ :Ce ³⁺ _x
(In Formula 11, 0<x≤0.1)
[Formula 12]
La _3-x Si ₆ N ₁₁ :Ce ³⁺ _x
(In Formula 12, 0<x≤0.1) According to paragraph 1,
A first phosphor in an amount of 1% to 5% by weight, a second phosphor in an amount of 30% to 40% by weight, a third phosphor in an amount of 1% to 5% by weight based on a total of 100% by weight of the phosphor composition, and A light emitting device package comprising 50% by weight or more and 65% by weight or less of a fourth phosphor. According to paragraph 1,
Based on the total 100% by weight of the phosphor composition, 10% by weight or more and 20% by weight or less of the first phosphor, 70% by weight or more and 85% by weight or less of the second phosphor, 1% by weight or more and 5% by weight or less of the third phosphor, and A light emitting device package comprising 4% by weight or more and 10% by weight or less of the fifth phosphor. According to paragraph 1,
A light emitting device package, wherein the phosphor composition is contained in an amount of 30% by weight or more and 50% by weight or less based on a total of 100% by weight of the encapsulant.