KR20250077322A - Light emitting device package - Google Patents

Abstract

A light-emitting device package according to an embodiment of the technical idea of the present invention comprises: a body including a first electrode and a second electrode; a semiconductor light-emitting device disposed on the body and emitting blue light; and a wavelength conversion member covering the semiconductor light-emitting device on the body, wherein the wavelength conversion member includes a transparent encapsulating material and a wavelength conversion material disposed inside the transparent encapsulating material, wherein the wavelength conversion material includes a green wavelength conversion material, a first red wavelength conversion material, and a second red wavelength conversion material, wherein the first red wavelength conversion material is a Mn ⁴⁺ active phosphor, and the second red wavelength conversion material is a Eu ²⁺ active phosphor containing more than 0 wt% and 2.4 wt% or less of oxygen, and a weight ratio of the second red wavelength conversion material among the wavelength conversion materials is 1 wt% to 6 wt%.

Description

LIGHT EMITTING DEVICE PACKAGE

The technical field of the present invention relates to a light-emitting device package, and more specifically, to a light-emitting device package having excellent light-emitting characteristics.

A light-emitting device package including a semiconductor light-emitting device is known as a next-generation light source that has advantages such as a long lifespan, low power consumption, fast response speed, and environmental friendliness compared to conventional light sources, and is attracting attention as an important light source in various products such as lighting devices and backlights for display devices. Accordingly, a light-emitting device package is required to have a structure that has even better light-emitting characteristics and lower product defects.

The problem that the technical idea of the present invention seeks to solve is to provide a light-emitting device package with improved luminous efficiency by controlling the weight ratio of a wavelength conversion material.

The problems to be solved by the technical idea of the present invention are not limited to the problems mentioned above, and other 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 technical idea of the present invention comprises: a body part including a first electrode and a second electrode; a semiconductor light-emitting device disposed on the body part and emitting blue light; and a wavelength conversion part covering the semiconductor light-emitting device on the body part, wherein the wavelength conversion part includes a transparent encapsulating material and a wavelength conversion material disposed inside the transparent encapsulating material, and the wavelength conversion material includes a green wavelength conversion material, a first red wavelength conversion material, and a second red wavelength conversion material, wherein the first red wavelength conversion material is a Mn ⁴⁺ active phosphor, and the second red wavelength conversion material is a Eu ²⁺ active phosphor containing more than 0 wt% and 2.4 wt% or less of oxygen, and a weight ratio of the second red wavelength conversion material among the wavelength conversion materials is 1 wt% to 6 wt%.

A light-emitting device package according to an embodiment of the technical idea of the present invention includes a wavelength conversion material that emits white light having a color rendering index (CRI) of 90 or higher and an R9 value of 50 or higher from blue light having a peak wavelength of 447 nm to 457 nm emitted from a semiconductor light-emitting device, wherein the wavelength conversion material includes a Y3(Al,Ga) ₅ O ₁₂ :Ce ³⁺ phosphor as a green wavelength conversion material; a K ₂ SiF ₆ :Mn ⁴⁺ phosphor as a first red wavelength conversion material; and a (Sr,Ca)AlSi(ON) ₃ :Eu ²⁺ phosphor as a second red wavelength conversion material; wherein a weight ratio of the second red wavelength conversion material among the wavelength conversion materials is 1 wt% to 6 wt%.

A light-emitting device package according to an embodiment of the technical idea of the present invention includes a wavelength conversion material that emits white light having a color rendering index (CRI) of 90 or higher and an R9 value of 50 or higher from blue light having a peak wavelength of 447 nm to 457 nm emitted from a semiconductor light-emitting device, wherein the wavelength conversion material includes a Y3(Al,Ga) ₅ O ₁₂ :Ce ³⁺ phosphor as a green wavelength conversion material; a K ₂ SiF ₆ :Mn ⁴⁺ phosphor as a first red wavelength conversion material; and a (Sr,Ca)AlSi(ON) ₃ :Eu ²⁺ phosphor containing more than 0 wt% and 2.4 wt% or less of oxygen as a second red wavelength conversion material.

A light-emitting device package according to an embodiment of the technical idea of the present invention has an effect of improving light-emitting efficiency by controlling the weight ratio of a wavelength conversion material included in a wavelength conversion part covering a semiconductor light-emitting device.

FIG. 1 is a cross-sectional view showing the main configuration of a light-emitting device package according to one embodiment of the present invention.
FIGS. 2 and 3 are cross-sectional views showing the main configuration of a light emitting device package according to another embodiment of the present invention.
Figure 4 is a graph showing the relationship between visibility and luminous speed.
FIGS. 5 and 6 are schematic cross-sectional views of a white light source module including a light emitting element package according to one embodiment of the present invention.
FIG. 7 is a schematic cross-sectional view of a white light source module that can be employed in a lighting device as a light-emitting element package according to one embodiment of the present invention.
FIG. 8 is a CIE chromaticity diagram showing a full radiant spectrum that can be used in a light emitting device package according to one embodiment of the present invention.
FIG. 9 is a schematic perspective view of a backlight unit including a light-emitting element package according to one embodiment of the present invention.
FIG. 10 is a drawing showing a direct-type backlight unit including a light-emitting element package according to one embodiment of the present invention.
FIG. 11 is a drawing showing a backlight unit including a light-emitting element package according to one embodiment of the present invention.
FIG. 12 is a drawing for explaining a direct-type backlight unit including a light-emitting element package according to one embodiment of the present invention.
FIG. 13 is a drawing for explaining a direct-type backlight unit including a light-emitting element package according to one embodiment of the present invention.
FIGS. 14 to 16 are drawings for explaining a backlight unit including a light-emitting element package according to one embodiment of the present invention.
FIG. 17 is a schematic exploded perspective view of a display device including a light-emitting element package according to one embodiment of the present invention.
FIG. 18 is a perspective view schematically illustrating a flat lighting device including a light emitting element package according to one embodiment of the present invention.
FIG. 19 is an exploded perspective view schematically illustrating a lighting device including a light-emitting element package according to one embodiment of the present invention.
FIG. 20 is an exploded perspective view schematically illustrating a lighting device including a light-emitting element package according to one embodiment of the present invention.
FIG. 21 is an exploded perspective view schematically illustrating a bar-type lighting device including a light-emitting element package according to one embodiment of the present invention.
FIG. 22 is a schematic diagram illustrating an indoor lighting control network system including a light emitting element package according to one embodiment of the present invention.
FIG. 23 is a schematic diagram illustrating a network system including a light-emitting element package according to one embodiment of the present invention.
FIG. 24 is a block diagram for explaining the communication operation between a smart engine of a lighting device including a light-emitting element package according to one embodiment of the present invention and a mobile device.
FIG. 25 is a conceptual diagram schematically illustrating a smart lighting system including a light-emitting element package according to one embodiment of the present invention.

Hereinafter, embodiments of the technical idea of the present invention will be described in detail with reference to the attached drawings.

FIG. 1 is a cross-sectional view showing the main configuration of a light-emitting device package according to one embodiment of the present invention.

Referring to FIG. 1, a light-emitting device package (100) includes a body portion (10), a first electrode (11) and a second electrode (12) arranged on the body portion (10), a side wall portion (20) arranged on the body portion (10) and having a cavity, a semiconductor light-emitting device (30) arranged within the cavity, a conductive wire (40) connecting the first electrode (11) and the second electrode (12) to the semiconductor light-emitting device (30), and a wavelength conversion portion (50) filling the cavity and covering the semiconductor light-emitting device (30).

The body part (10) and the side wall part (20) may be formed including a silicone material, a synthetic resin material, or a metal material, respectively. The semiconductor light emitting element (30) may be arranged on the body part (10). In addition, the side wall part (20) may include a cavity, and the bottom surface of the cavity may be a mounting surface of the semiconductor light emitting element (30). The side wall part (20) may be formed to have an inclined surface around the semiconductor light emitting element (30) to increase light extraction efficiency.

The first electrode (11) and the second electrode (12) are electrically separated from each other and provide power to the semiconductor light-emitting element (30). In some embodiments, the first electrode (11) and the second electrode (12) can reflect light generated from the semiconductor light-emitting element (30) to increase light extraction efficiency, and can also serve to discharge heat generated from the semiconductor light-emitting element (30) to the outside.

The semiconductor light-emitting element (30) may be placed on the body part (10), or may be placed on the first electrode (11) or the second electrode (12). In the drawing, the semiconductor light-emitting element (30) is depicted as being placed on the second electrode (12), but is not limited thereto.

The conductive wire (40) can electrically connect the first electrode (11) and the second electrode (12) and the semiconductor light-emitting element (30). Although not shown, the first electrode (11) and the second electrode (12) and the semiconductor light-emitting element (30) may be electrically connected by either a flip-chip method or a die bonding method.

The wavelength conversion unit (50) may fill the interior of the cavity so as to cover the semiconductor light emitting element (30) and the conductive wire (40) on the body (10). The wavelength conversion unit (50) may include a transparent sealing material (52) and a plurality of wavelength conversion materials (54, 56, 58) arranged inside the transparent sealing material (52).

The above-described plurality of wavelength conversion materials (54, 56, 58) may include a green wavelength conversion material (54), a first red wavelength conversion material (56), and a second red wavelength conversion material (58). Here, the green wavelength conversion material (54) means a green fluorescent substance, and the first red wavelength conversion material (56) and the second red wavelength conversion material (58) mean red fluorescent substances. In addition, the first red wavelength conversion material (56) means a first red fluorescent substance, and the second red wavelength conversion material (58) means a second red fluorescent substance.

In an embodiment of the present invention, so that the light-emitting device package (100) can emit white light, the semiconductor light-emitting device (30) can be a blue light-emitting device capable of emitting blue light having a peak wavelength of 447 nm to 457 nm. In addition, the wavelength conversion unit (50) can implement the color temperature and color rendering properties of white light from the blue light emitted from the semiconductor light-emitting device (30) by combining a green phosphor and a red phosphor.

The above transparent encapsulating material (52) constitutes the outer shape of the wavelength conversion unit (50), and the plurality of wavelength conversion materials (54, 56, 58) can be dispersed and distributed inside it. In some embodiments, the plurality of wavelength conversion materials (54, 56, 58) can be uniformly dispersed and distributed throughout the entire transparent encapsulating material (52).

The transparent sealing material (52) may be a resin. In some embodiments, the transparent sealing material (52) may include silicone having a refractive index of 1.41 to 1.54. If the refractive index of the material constituting the transparent sealing material (52) is less than 1.41, gas permeability may be low, resulting in poor reliability, and if the refractive index is greater than 1.54, discoloration and crack resistance due to phenyl may be poor.

The green wavelength conversion material (54) may be composed of a Ce ³⁺ active phosphor. In some embodiments, the green wavelength conversion material (54) may be a Y3(Al,Ga) ₅ O ₁₂ :Ce ³⁺ phosphor (hereinafter, referred to as a GaYAG phosphor). The weight ratio of the green wavelength conversion material (54) among the plurality of wavelength conversion materials (54, 56, 58) may be expressed as a numerical value excluding the weight ratios of the first and second red wavelength conversion materials (56, 58) among the plurality of wavelength conversion materials (54, 56, 58). For example, the weight ratio of the green wavelength conversion material (54) among the plurality of wavelength conversion materials (54, 56, 58) may be 38 wt% to 64 wt%.

The first red wavelength conversion material (56) may be composed of a Mn ⁴⁺ active phosphor. In some embodiments, the first red wavelength conversion material (56) may be a K ₂ SiF ₆ :Mn ⁴⁺ phosphor (hereinafter, referred to as a KSF phosphor). The weight ratio of the first red wavelength conversion material (56) among the plurality of wavelength conversion materials (54, 56, 58) may vary depending on the color temperature, but may be, for example, 32 wt% to 56 wt%. When the weight ratio of the first red wavelength conversion material (56) is less than 32 wt%, the luminous flux may increase but the color rendering may decrease, and when the weight ratio is greater than 56 wt%, the color rendering may increase but the luminous flux may decrease.

In an embodiment of the present invention, the second red wavelength conversion material (58) may be composed of a Eu ²⁺ active phosphor. In some embodiments, the first red wavelength conversion material (56) may be a (Sr,Ca)AlSi(ON) ₃ :Eu ²⁺ phosphor (hereinafter, referred to as a SCASN phosphor). Here, the first red wavelength conversion material (56) may contain oxygen in an amount greater than 0 wt% and less than or equal to 2.4 wt% (based on an ON analyzer from ELTRA). If the amount of oxygen in the first red wavelength conversion material (56) is greater than 2.4 wt%, the half-width may be widened, making it unsuitable for use.

In addition, the weight ratio of the second red wavelength conversion material (58) among the plurality of wavelength conversion materials (54, 56, 58) may vary depending on the color temperature, but may be, for example, 1 wt% to 6 wt%. When the weight ratio of the second red wavelength conversion material (58) is less than 1 wt%, the color rendering may increase but the luminous flux may decrease, and when the weight ratio is greater than 6 wt%, the luminous flux may increase but the color rendering may decrease. For example, for specific values under the condition of a color temperature of 5000 K, refer to Table 1 below.

Green phosphor and
First red phosphor Second red phosphor speed of light Color rendering R9 100.0wt% - 100.0% 92.0 92.4 99.0wt% 1.0wt% 100.6% 94.1 97.5 98.0wt% 2.0wt% 101.2% 93.0 82.2 96.0wt% 4.0wt% 101.8% 91.1 67.0 93.0wt% 7.0wt% 102.5% 89.0 52.0

Therefore, in order to realize the characteristics of high luminous flux (greater than 100%), high color rendering index (greater than 90), and high R9 value (greater than 50), the green wavelength conversion material (54), the first red wavelength conversion material (56), and the second red wavelength conversion material (58) must satisfy the respective weight ratio conditions. For specific values in each color temperature range (2600 K to 6600 K), refer to Table 2 below.

Color temperature Green phosphor First red phosphor Second red phosphor 2600~2800K 38~40wt% 54~56wt% 4~6wt% 2900~3100K 40~42wt% 53~55wt% 4~6wt% 3400~3600K 47~49wt% 47~49wt% 4~6wt% 3900~4100K 49~51wt% 46~48wt% 2~4wt% 4900~5100K 58~60wt% 37~39wt% 2~4wt% 5600~5800K 61~63wt% 34~36wt% 1~3wt% 6400~6600K 63~65wt% 32~34wt% 2~4wt%

In addition, the weight ratio of the second red wavelength conversion material (58) among the total weight ratios of the first and second red wavelength conversion materials (56, 58) may be 5 wt% to 10 wt%. For specific values at each color temperature (2700 K to 6500 K), refer to Table 3 below.

Color temperature First red phosphor Second red phosphor 2700K 90~92wt% 8~10wt% 3000K 91~93wt% 7~9wt% 3500K 90~92wt% 8~10wt% 4000K 92~94wt% 6~8wt% 5000K 92~94wt% 6~8wt% 5700K 93~95wt% 5~7wt% 6500K 92~94wt% 6~8wt%

Through the second red wavelength conversion material (58) satisfying these conditions, in the embodiment of the present invention, the light emitting device package (100) can emit red light having a peak wavelength of 595 nm to 615 nm and a half width of 78 nm or less.

A light-emitting device package (100) including a semiconductor light-emitting device (30) is known as a next-generation light source having advantages such as a long lifespan, low power consumption, fast response speed, and environmental friendliness compared to conventional light sources, and is attracting attention as an important light source in various products such as lighting devices and backlights for display devices. Accordingly, a light-emitting device package (100) is required to have a structure that has even better light-emitting characteristics and lower product defects.

In order to satisfy these requirements, it is desirable that the light-emitting element package (100) that emits white light, which is generally used in a lighting device, have a high luminous flux and high color rendering properties. In order for the light-emitting element package (100) to have a high color rendering properties, a KSF phosphor having a narrow half-width can be used as a red wavelength conversion material.

The inventors of the present invention studied a light-emitting device package (100) capable of maximizing luminous flux while realizing high color rendering by using a specific content of the KSF phosphor. In order to apply the KSF phosphor having a narrow half-width to a lighting device, it is necessary to secure an appropriate level of reliability.

Because, in order to satisfy the long-life characteristics of the lighting device, it is an important task to use only an appropriate amount of the somewhat unreliable KSF phosphor. In addition, due to the characteristics of the lighting device, it is essential to improve reliability while maintaining high color rendering and high luminous flux. In other words, a method is needed to secure a similar lifespan to that of the light-emitting element package that does not use the KSF phosphor.

In this way, the inventors of the present invention proposed a method of including a SCASN phosphor containing oxygen at a certain weight ratio as a second red wavelength conversion material (58) in a light-emitting device package (100).

Ultimately, the light emitting device package (100) according to the embodiment of the technical idea of the present invention has the effect of improving light emitting efficiency by controlling the weight ratio of a plurality of wavelength conversion materials (54, 56, 58) included in the wavelength conversion part (50) covering the semiconductor light emitting device (30).

FIGS. 2 and 3 are cross-sectional views showing the main configuration of a light emitting device package according to another embodiment of the present invention.

Most of the components and materials forming the light emitting device packages (100A, 100B) described below are substantially the same as or similar to those described above in FIG. 1. Therefore, for convenience of explanation, the explanation will focus on differences from the light emitting device package (100) described above.

Referring to FIG. 2, a light-emitting device package (100A) includes a body portion (10), a first electrode (11) and a second electrode (12) arranged on the body portion (10), a side wall portion (20) having a cavity and arranged on the body portion (10), a semiconductor light-emitting device (30) arranged within the cavity, a conductive wire (40) connecting the first electrode (11) and the second electrode (12) to the semiconductor light-emitting device (30), and a wavelength conversion portion (50) filling the cavity and covering the semiconductor light-emitting device (30).

In an embodiment of the present invention, the wavelength conversion unit (50) may include a transparent encapsulating material (52) and a plurality of wavelength conversion materials (54, 56, 58) arranged inside the transparent encapsulating material (52). In some embodiments, when the upper vertical length (HT) and the lower vertical length (HB) of the transparent encapsulating material (52) are substantially the same, the plurality of wavelength conversion materials (54, 56, 58) may be dispersed and arranged only in the lower portion of the transparent encapsulating material (52).

Although not bound by a specific theory, the distribution density of the plurality of wavelength conversion materials (54, 56, 58) can be higher at the lower portion of the transparent encapsulating material (52), that is, around the semiconductor light emitting element (30), depending on the weight of the plurality of wavelength conversion materials (54, 56, 58) and/or the viscosity of the transparent encapsulating material (52).

Referring to FIG. 3, a light-emitting device package (100B) includes a body portion (10), a first electrode (11) and a second electrode (12) arranged on the body portion (10), a side wall portion (20) having a cavity and arranged on the body portion (10), first and second semiconductor light-emitting devices (32, 34) arranged within the cavity, a conductive wire (40) connecting the first electrode (11) and the second electrode (12) to the first and second semiconductor light-emitting devices (32, 34), and a wavelength conversion portion (50) filling the cavity and covering the first and second semiconductor light-emitting devices (32, 34).

In an embodiment of the present invention, the first and second semiconductor light-emitting elements (32, 34) may be disposed on the body portion (10), or may be disposed on the first electrode (11) or the second electrode (12). In the drawing, the first and second semiconductor light-emitting elements (32, 34) are depicted as being disposed on the second electrode (12), but are not limited thereto.

In some embodiments, the first semiconductor light-emitting element (32) and the second semiconductor light-emitting element (34) may be semiconductor light-emitting elements of the same type, and in other embodiments, the first semiconductor light-emitting element (32) and the second semiconductor light-emitting element (34) may be semiconductor light-emitting elements of different types.

For convenience of explanation, the drawing illustrates two first and second semiconductor light-emitting elements (32, 34), but the number of the first and second semiconductor light-emitting elements (32, 34) is not limited thereto. For example, three or more semiconductor light-emitting elements may be included in the light-emitting element package (100B).

Figure 4 is a graph showing the relationship between visibility and luminous speed.

Referring to Figure 4, the horizontal axis of the graph is a number representing wavelength (in nanometers), and the vertical axis is a number representing intensity (in arbitrary units).

The sensitivity curve in the graph has a maximum intensity at a wavelength of 555 nm, and the intensity decreases toward the left and right wavelength regions based on the maximum. If the efficiency of the phosphor used in the light-emitting device package is the same or similar, the left and right wavelength regions (especially, the right wavelength region) may be relatively less important regions.

Therefore, in the light-emitting device package using KSF phosphor as the red wavelength conversion material, the spectrum in the right wavelength region, which does not contribute much to the luminous flux, can be seen as relatively less important. Therefore, the luminous flux of the experimental group (CRI90 KSF) with the maximum intensity at a wavelength of 555 nm may be a more important factor compared to the control group (CRI90 REF) with the same color rendering index.

That is, according to an embodiment of the technical idea of the present invention, there is an effect of improving luminous efficiency in a light-emitting device package (100, see FIG. 1) using a KSF phosphor as a first red wavelength conversion material (56, see FIG. 1).

FIGS. 5 and 6 are schematic cross-sectional views of a white light source module including a light emitting element package according to one embodiment of the present invention.

Referring to FIG. 5, a light source module (1100) for a backlight may include a circuit board (1110) and an array of a plurality of light emitting element packages (1100a) mounted on the circuit board (1110).

A conductive pattern connected to a light-emitting element package (1100a) may be formed on the upper surface of the circuit board (1110). The light-emitting element package (1100a) may be any one of the light-emitting element packages (100, 100A, 100B) according to an embodiment of the present invention described above.

Each light-emitting element package (1100a) may have a structure in which a semiconductor light-emitting element (1130) emitting blue light is directly mounted on a circuit board (1110) in a COB (Chip On Board) manner. Each light-emitting element package (1100a) may have a wavelength conversion unit (1130a) in a hemispherical shape with a lens function, thereby exhibiting a wide beam angle. This wide beam angle may contribute to reducing the thickness or width of the display.

Referring to FIG. 6, a light source module (1200) for a backlight may include a circuit board (1210) and an array of a plurality of light emitting element packages (1200a) mounted on the circuit board (1210).

Each light-emitting element package (1200a) may include a semiconductor light-emitting element (1130) that emits blue light and is mounted in a reflective cup of a package body (1125) and a wavelength conversion part (1130b) that encapsulates the same. The light-emitting element package (1200a) may be any one of the light-emitting element packages (100, 100A, 100B) according to an embodiment of the present invention described above.

The wavelength conversion unit (1130a, 1130b) may contain a wavelength conversion material (1132, 1134, 1136) such as a fluorescent substance and/or quantum dot, as needed. Details of the wavelength conversion material are as described above.

FIG. 7 is a schematic cross-sectional view of a white light source module that can be employed in a lighting device as a light-emitting element package according to one embodiment of the present invention, and FIG. 8 is a CIE chromaticity diagram showing a complete radiant spectrum that can be used in a light-emitting element package according to one embodiment of the present invention.

Specifically, each of the light source modules illustrated in (a) and (b) of FIG. 7 may include a plurality of light emitting element packages mounted on a circuit board. The plurality of light emitting element packages may be any one of the light emitting element packages (100, 100A, 100B) according to one embodiment of the present invention described above.

A plurality of light-emitting element packages mounted on a single light source module may be composed of homogeneous packages that generate light of the same wavelength, but, as in this embodiment, may be composed of heterogeneous packages that generate light of different wavelengths.

Referring to (a) of FIG. 7, in some embodiments, a white light source module may be configured by combining a white light-emitting element package having color temperatures of 4000 K and 3000 K and a red light-emitting element package. The white light source module may provide white light having a color temperature adjustable in a range of 3000 K to 4000 K and a color rendering index Ra in a range of 85 to 100.

Referring to (b) of FIG. 7, in other embodiments, the white light source module may be composed of only white light-emitting element packages, but some of the packages may have white light of different color temperatures. For example, by combining a white light-emitting element package having a color temperature of 2700 K and a white light-emitting element package having a color temperature of 5000 K, white light whose color temperature can be adjusted to a range of 2700 K to 5000 K and whose color rendering index Ra is 85 to 99 can be provided. Here, the number of light-emitting element packages for each color temperature may vary mainly depending on the basic color temperature setting value.

In a single light-emitting element package, the desired color of light can be determined based on the wavelength of the light-emitting element, the LED chip, and the type and mixing ratio of the fluorescent material, and in the case of white light, the color temperature and color rendering can be adjusted.

For example, when a semiconductor light-emitting element emits blue light, a light-emitting element package including at least one of yellow, green, and red phosphors can emit white light of various color temperatures depending on the mixing ratio of the phosphors. In contrast, a light-emitting element package that applies a green or red phosphor to a semiconductor light-emitting element can emit green or red light.

In a heterogeneous light-emitting device package, a light-emitting device package that emits white light and a light-emitting device package that emits green or red light can be combined to control the color temperature and color rendering properties of the white light. In addition, it can be configured to include at least one light-emitting device package that emits purple, blue, green, red, or infrared light.

In this case, the lighting device can adjust the color rendering to the level of sunlight, and also generate white light with a color temperature ranging from 1500K to 20000K, and can generate visible light or infrared light of purple, blue, green, red, and orange as needed to adjust the lighting color to suit the surrounding atmosphere or mood. In addition, it can also generate light of a special wavelength that can promote plant growth.

Referring to FIG. 8, white light created by combining yellow, green, and/or red phosphors in a semiconductor light-emitting element of blue light has two or more peak wavelengths, and the (x, y) coordinates of the CIE coordinate system can be located within a line segment region connecting A (0.4476, 0.4074), B (0.3484, 0.3516), C (0.3101, 0.3162), D (0.3128, 0.3292), and E (0.3333, 0.3333). Alternatively, the white light can be located in a region surrounded by the line segment and the black body radiation spectrum. The color temperature of the white light corresponds to between 1500 K and 20000 K.

White light near point E (0.3333, 0.3333) below the above black body radiation spectrum (Planckian locus) can be used as an illumination light source in an area where the yellow series component is relatively weakened and can give a clearer or fresher feeling to the human eye. Therefore, lighting products using white light near point E (0.3333, 0.3333) below the above black body radiation spectrum are effective as lighting for commercial buildings selling food, clothing, etc.

Meanwhile, various materials such as fluorescent substances and/or quantum dots can be used as materials for converting the wavelength of light emitted from semiconductor light-emitting devices.

The fluorescent material can have the following composition and color.

Oxide systems: yellow and green Y ₃ Al ₅ O ₁₂ :Ce, Tb ₃ Al ₅ O ₁₂ :Ce, Lu ₃ Al ₅ O ₁₂ :Ce

Silicate series: yellow and green (Ba,Sr) ₂ SiO ₄ :Eu, yellow and orange (Ba,Sr) ₃ SiO ₅ :Ce

Nitride system: green -SiAlON:Eu, yellow La ₃ Si ₆ N ₁₁ :Ce, orange -SiAlON:Eu, red CaAlSiN ₃ :Eu, Sr ₂ Si ₅ N ₈ :Eu, SrSiAl ₄ N ₇ :Eu, SrLiAl ₃ N ₄ :Eu, Ln _4-x (Eu _z M _1-z ) _x Si _12-y Al _y O _3+x+y N _18-xy (0.5<x=3, 0<z<0.3, 0<y=4) (However, Ln is at least one element selected from the group consisting of Group Ⅲa elements and rare earth elements, and M is at least one element selected from the group consisting of Ca, Ba, Sr, and Mg)

Fluorite series: KSF series red K ₂ SiF ₆ :Mn ⁴⁺ , K ₂ TiF ₆ :Mn ⁴⁺ , NaYF ₄ :Mn ⁴⁺ , NaGdF ₄ :Mn ⁴⁺ , K ₃ SiF ₇ :Mn ⁴⁺

The composition of the phosphor must basically conform to stoichiometry, and each element can be substituted with other elements within each group in the periodic table. For example, Sr can be substituted with Ba, Ca, Mg, etc. of the alkaline earth (Ⅱ) group, and Y can be substituted with Tb, Lu, Sc, Gd, etc. of the lanthanide series. In addition, the activator Eu, etc. can be substituted with Ce, Tb, Pr, Er, Yb, etc. depending on the desired energy level, and the activator alone or an activator can be additionally applied for characteristic modification.

In particular, the fluorite red phosphor may be coated with a fluoride that does not contain Mn, respectively, to improve reliability at high temperature/high humidity, or may further include an organic coating on the surface of the phosphor or the surface of the fluoride coating that does not contain Mn. In the case of the fluorite red phosphor, unlike other phosphors, since it can implement a narrow half-width of 40 nm or less, it can be utilized in high-resolution displays such as UHD displays.

FIG. 9 is a schematic perspective view of a backlight unit including a light-emitting element package according to one embodiment of the present invention.

Referring to FIG. 9, the backlight unit (2000) may include a light guide plate (2040) and a light source module (2010) provided on both sides of the light guide plate (2040). In addition, the backlight unit (2000) may include a reflector (2020) disposed below the light guide plate (2040). The backlight unit (2000) of the present embodiment may be an edge-type backlight unit.

The light source module (2010) may be provided only on one side of the light guide plate (2040), or may be additionally provided on another side. The light source module (2010) may include a printed circuit board (2001) and a plurality of light sources (2005) mounted on an upper surface of the printed circuit board (2001). The plurality of light sources (2005) may be any one of the light emitting device packages (100, 100A, 100B) according to an embodiment of the present invention described above.

FIG. 10 is a drawing showing a direct-type backlight unit including a light-emitting element package according to one embodiment of the present invention.

Referring to FIG. 10, the backlight unit (2100) may include a light diffusion plate (2140) and a light source module (2110) arranged under the light diffusion plate (2140). In addition, the backlight unit (2100) may include a bottom case (2160) arranged under the light diffusion plate (2140) and accommodating the light source module (2110). The backlight unit (2100) of the present embodiment may be a direct-type backlight unit.

The light source module (2110) may include a printed circuit board (2101) and a plurality of light sources (2105) mounted on an upper surface of the printed circuit board (2101). The plurality of light sources (2105) may be any one of the light emitting device packages (100, 100A, 100B) according to an embodiment of the present invention described above.

FIG. 11 is a drawing showing a backlight unit including a light-emitting element package according to one embodiment of the present invention.

Referring to FIG. 11, an embodiment of arranging a plurality of light sources (2205) in a direct-type backlight unit (2200) is illustrated. The plurality of light sources (2205) may be any one of the light-emitting element packages (100, 100A, 100B) according to an embodiment of the present invention described above.

A direct-type backlight unit (2200) according to the present embodiment is configured with a plurality of light sources (2205) arranged on a substrate (2201). The arrangement structure of the plurality of light sources (2205) is a matrix structure arranged in rows and columns, and each row and column has a zigzag shape.

In other words, it can be understood that the structure is such that a second matrix of the same shape is arranged inside a first matrix in which a plurality of light sources (2205) are arranged in rows and columns in a straight line, and each light source (2205) of the second matrix is positioned inside a square formed by four adjacent light sources (2205) included in the first matrix.

However, in order to further improve the uniformity of brightness and light efficiency in the direct-type backlight unit, the first and second matrices may have different arrangement structures and intervals, if necessary. In addition, in addition to the arrangement method of the plurality of light sources (2205), the distance (S1, S2) between adjacent light sources may be optimized so as to secure uniformity of brightness.

In this way, by arranging rows and columns composed of multiple light sources (2205) in a zigzag manner rather than in a straight line, there is an advantage in that the number of light sources (2205) can be reduced by about 15% to 25% for the same light-emitting area.

FIG. 12 is a drawing for explaining a direct-type backlight unit including a light-emitting element package according to one embodiment of the present invention.

Referring to FIG. 12, a backlight unit (2300) according to the present embodiment may include an optical sheet (2320) and a light source module (2310) arranged below the optical sheet (2320). The optical sheet (2320) may include a diffusion sheet (2321), a light collection sheet (2322), a protective sheet (2323), and the like.

The light source module (2310) may include a circuit board (2311), a plurality of light sources (2312) mounted on the circuit board (2311), and a plurality of optical elements (2313) respectively disposed above the plurality of light sources (2312). The plurality of light sources (2312) may be any one of the light emitting element packages (100, 100A, 100B) according to an embodiment of the present invention described above.

The optical element (2313) can adjust the light beam angle through refraction, and in particular, a wide beam angle lens that diffuses the light source (2312) to a wide area can be used. Since the light source (2312) to which such an optical element (2313) is attached has a wider light distribution, when the light source module is used for a backlight, flat panel lighting, etc., the number of light sources (2312) required per the same area can be saved.

FIG. 13 is a drawing for explaining a direct-type backlight unit including a light-emitting element package according to one embodiment of the present invention.

Referring to FIG. 13, a backlight unit (2400) has a light source (2405) mounted on a circuit board (2401) and one or more optical sheets (2406) arranged thereon.

The light source (2405) may be a white light-emitting device including a red phosphor. The light source (2405) may be a module mounted on the circuit board (2401). The light source (2405) may be any one of the light-emitting device packages (100, 100A, 100B) according to an embodiment of the present invention described above.

The circuit board (2401) used in this embodiment may have a first flat portion (2401a) corresponding to a main area, an inclined portion (2401b) arranged around the first flat portion and having at least a portion bent, and a second flat portion (2401c) arranged at a corner of the circuit board (2401) that is outside the inclined portion (2401b).

On the first flat portion (2401a), light sources (2405) are arranged at a first interval (d1), and on the inclined portion (2401b), one or more light sources (2405) can be arranged at a second interval (d2). The first interval (d1) can be the same as the second interval (d2). The width (or length in the cross section) of the inclined portion (2401b) can be formed to be smaller than the width of the first flat portion (2401a) and longer than the width of the second flat portion (2401c). In addition, at least one light source (2405) can be arranged on the second flat portion (2401c), if necessary.

The inclination of the above-mentioned inclined portion (2401b) can be appropriately adjusted within a range greater than 0° and less than 90° with respect to the first flat portion (2401a). By having this structure, the circuit board (2401) can maintain uniform brightness even near the edge of the optical sheet (2406).

FIGS. 14 to 16 are drawings for explaining a backlight unit including a light-emitting element package according to one embodiment of the present invention.

Referring to FIGS. 14 to 16, the backlight units (2500, 2600, 2700) may have wavelength conversion units (2550, 2650, 2750) positioned not at the light sources (2505, 2605, 2705) but outside the light sources (2505, 2605, 2705) and inside the backlight units (2500, 2600, 2700) to convert light. The light sources (2505, 2605, 2705) may be any one of the light-emitting element packages (100, 100A, 100B) according to the above-described embodiment of the present invention.

The backlight unit (2500) of Fig. 14 is a direct-type backlight unit, and may include a wavelength conversion unit (2550), a light source module (2510) arranged below the wavelength conversion unit (2550), and a bottom case (2560) that accommodates the light source module (2510). In addition, the light source module (2510) may include a printed circuit board (2501) and a plurality of light sources (2505) mounted on an upper surface of the printed circuit board (2501).

A wavelength conversion unit (2550) may be placed on the upper portion of the bottom case (2560) in the backlight unit (2500). Accordingly, at least a portion of the light emitted from the light source module (2510) may have its wavelength converted by the wavelength conversion unit (2550). The wavelength conversion unit (2550) may be applied as a separate film, but is not limited thereto.

The backlight unit (2600, 2700) of FIGS. 15 and 16 is an edge-type backlight unit and may include a wavelength conversion unit (2650, 2750), a light guide plate (2640, 2740), a reflection unit (2620, 2720) arranged on one side of the light guide plate (2640, 2740), and a light source (2605, 2705). Light emitted from the light source (2605, 2705) may be guided into the interior of the light guide plate (2640, 2740) by the reflection unit (2620, 2720).

In the backlight unit (2600) of Fig. 15, the wavelength conversion unit (2650) may be placed between the light guide plate (2640) and the light source (2605). In the backlight unit (2700) of Fig. 16, the wavelength conversion unit (2750) may be placed on the light emitting surface of the light guide plate (2740).

FIG. 17 is a schematic exploded perspective view of a display device including a light-emitting element package according to one embodiment of the present invention.

Referring to FIG. 17, a display device (3000) may include a backlight unit (3100), an optical sheet (3200), and an image display panel (3300) such as a liquid crystal panel. The backlight unit (3100) may include a bottom case (3110), a reflector (3120), a light guide plate (3140), and a light source module (3130) provided on at least one side of the light guide plate (3140). The light source module (3130) may include a printed circuit board (3131) and a light source (3132).

In particular, the light source (3132) may be a side-view type light emitting element mounted on the side adjacent to the light emitting surface. The light source (3132) may be any one of the light emitting element packages (100, 100A, 100B) according to an embodiment of the present invention described above.

The image display panel (3300) can display an image using light emitted from an optical sheet (3200). The image display panel (3300) can include an array substrate (3320), a liquid crystal layer (3330), and a color filter substrate (3340). The array substrate (3320) can include pixel electrodes arranged in a matrix form, thin film transistors that apply a driving voltage to the pixel electrodes, and signal lines for operating the thin film transistors.

The color filter substrate (3340) may include a transparent substrate, a color filter, and a common electrode. The color filter may include a filter that selectively passes light of a specific wavelength among white light emitted from the backlight unit (3100). The liquid crystal layer (3330) may be rearranged by an electric field formed between the pixel electrode and the common electrode to adjust light transmittance. Light with adjusted light transmittance may display an image by passing through the color filter of the color filter substrate (3340). The image display panel (3300) may further include a driving circuit unit that processes an image signal.

FIG. 18 is a perspective view schematically illustrating a flat lighting device including a light emitting element package according to one embodiment of the present invention.

Referring to FIG. 18, the flat panel lighting device (4100) may include a light source module (4110), a power supply unit (4120), and a housing (4030). The light source module (4110) may include a light emitting element array as a light source, and the power supply unit (4120) may include a light emitting element driver. The light source module (4110) may be any one of the light emitting element packages (100, 100A, 100B) according to an embodiment of the present invention described above.

The light source module (4110) may include an array of light emitting elements and may be formed to form a planar phenomenon overall. The array of light emitting elements may include a controller that stores light emitting elements and driving information of the light emitting elements.

The power supply unit (4120) may be configured to supply power to the light source module (4110). The housing (4130) may have an accommodating space formed therein so that the light source module (4110) and the power supply unit (4120) may be accommodated therein, and may be formed in a hexahedral shape with one side open, but is not limited thereto. The light source module (4110) may be arranged to emit light from one open side of the housing (4130).

FIG. 19 is an exploded perspective view schematically illustrating a lighting device including a light-emitting element package according to one embodiment of the present invention.

Referring to FIG. 19, the lighting device (4200) may include a socket (4210), a power supply unit (4220), a heat dissipation unit (4230), a light source module (4240), and an optical unit (4250). The light source module (4240) may include a light emitting element array, and the power supply unit (4220) may include a light emitting element driving unit.

The socket (4210) may be configured to be replaceable with an existing lighting device. Power supplied to the lighting device (4200) may be applied through the socket (4210). The power supply unit (4220) may be assembled separately into a first power supply unit (4221) and a second power supply unit (4222). The heat dissipation unit (4230) may include an internal heat dissipation unit (4231) and an external heat dissipation unit (4232), and the internal heat dissipation unit (4231) may be directly connected to the light source module (4240) and/or the power supply unit (4220), thereby allowing heat to be transferred to the external heat dissipation unit (4232).

The light source module (4240) can receive power from the power supply unit (4220) and emit light to the optical unit (4250). The light source module (4240) can include one or more light emitting element packages (4241), a circuit board (4242), and a controller (4243), and the controller (4243) can store driving information of the light emitting element package (4241). The light emitting element package (4241) can be any one of the light emitting element packages (100, 100A, 100B) according to an embodiment of the present invention described above.

FIG. 20 is an exploded perspective view schematically illustrating a lighting device including a light-emitting element package according to one embodiment of the present invention.

Referring to FIG. 20, the lighting device (4300) according to the present embodiment, unlike the lighting device (4200) disclosed in FIG. 19, includes a reflector (4310) and a communication module (4320) on top of a light source module (4240). The reflector (4310) can evenly spread light from the light source to the sides and rear to reduce glare.

A communication module (4320) may be mounted on the upper portion of the reflector (4310), and home network communication may be implemented through the communication module (4320). For example, the communication module (4320) may be a wireless communication module using Bluetooth, WiFi, or LiFi, and may control lighting installed inside or outside the home, such as turning the lighting device on/off and adjusting the brightness, through a smartphone or wireless controller.

In addition, electronic products and automobile systems inside and outside the home, such as TVs, refrigerators, air conditioners, door locks, etc., can be controlled using a Li-Fi communication module that utilizes visible light wavelengths of lighting devices installed inside and outside the home. The reflector (4310) and communication module (4320) can be covered by a cover portion (4330).

FIG. 21 is an exploded perspective view schematically illustrating a bar-type lighting device including a light-emitting element package according to one embodiment of the present invention.

Referring to FIG. 21, the lighting device (4400) includes a heat dissipation member (4401), a cover (4427), a light source module (4421), a first socket (4405), and a second socket (4423).

A plurality of heat dissipation fins (4409, 4410) may be formed in a protruding shape on the inner and/or outer surface of the heat dissipation member (4401), and the plurality of heat dissipation fins (4409, 4410) may be designed to have various shapes and spacings.

A protruding support member (4413) is formed on the inside of the heat dissipation member (4401). A light source module (4421) can be fixed to the support member (4413). A catch protrusion (4411) can be formed at both ends of the heat dissipation member (4401). A catch groove (4429) is formed in the cover (4427), and the catch protrusion (4411) of the heat dissipation member (4401) can be connected to the catch groove (4429) in a hook-joining structure. The positions where the catch groove (4429) and the catch protrusion (4411) are formed can be exchanged.

The light source module (4421) may include a light emitting element array. The light source module (4421) may include a printed circuit board (4419), a light source (4417), and a controller (4415). The controller (4415) may store driving information of the light source (4417). Circuit wirings for operating the light source (4417) are formed on the printed circuit board (4419). In addition, components for operating the light source (4417) may be included. The light source (4417) may be any one of the light emitting element packages (100, 100A, 100B) according to an embodiment of the present invention described above.

The first and second sockets (4405, 4423) are a pair of sockets and have a structure that is coupled to both ends of a cylindrical cover unit composed of a heat dissipation member (4401) and a cover (4427). For example, the first socket (4405) may include an electrode terminal (4403) and a power supply (4407), and a dummy terminal (4425) may be arranged in the second socket (4423). In addition, an optical sensor and/or a communication module may be built into either of the first socket (4405) and the second socket (4423).

In some embodiments, a light sensor and/or communication module may be built into a first socket (4405) in which an electrode terminal (4403) is arranged. In other embodiments, a light sensor and/or communication module may be built into a second socket (4423) in which a dummy terminal (4425) is arranged.

FIG. 22 is a schematic diagram illustrating an indoor lighting control network system including a light emitting element package according to one embodiment of the present invention.

Referring to FIG. 22, the network system (5000) may be a complex smart lighting network system that combines lighting technology using light-emitting elements, Internet of Things (IoT) technology, wireless communication technology, etc.

The network system (5000) can be implemented using various lighting devices and wired/wireless communication devices, and can be implemented by sensors, controllers, communication means, network control, and software for maintenance.

The network system (5000) can be applied not only to closed spaces defined within buildings such as homes or offices, but also to open spaces such as parks and streets. The network system (5000) can be implemented based on an Internet of Things environment so that it can collect/process various information and provide it to users.

The LED lamp (5200) included in the network system (5000) receives information about the surrounding environment from the gateway (5100) and controls the lighting of the LED lamp (5200) itself, and can also perform a role such as checking and controlling the operating status of a plurality of devices (5300 to 5800) included in the Internet of Things environment based on the visible light communication function of the LED lamp (5200). The LED lamp (5200) can be any one of the light-emitting element packages (100, 100A, 100B) according to one embodiment of the present invention described above.

A network system (5000) may include a gateway (5100) for processing data transmitted and received according to different communication protocols, an LED lamp (5200) including an LED light-emitting element and connected to the gateway (5100) so as to be able to communicate with it, and a plurality of devices (5300 to 5800) connected so as to be able to communicate with the gateway (5100) according to various wireless communication methods.

In order to implement a network system (5000) based on an Internet of Things environment, a plurality of devices (5300 to 5800) including an LED lamp (5200) may include at least one communication module. In some embodiments, the LED lamp (5200) may be connected to communicate with a gateway (5100) by a wireless communication protocol such as Bluetooth, Wi-Fi, or Li-Fi, and for this purpose, may have at least one communication module (5210) for the lamp.

When the network system (5000) is applied to a home, a plurality of devices (5300 to 5800) connected to communicate with a gateway (5100) based on Internet of Things technology may include home appliances (5300), digital door locks (5400), garage door locks (5500), wall-mounted lighting switches (5600), routers (5700) for wireless communication network relay, and mobile devices (5800) such as smartphones, tablets, and laptop computers.

In a network system (5000), an LED lamp (5200) can check the operating status of multiple devices (5300 to 5800) using a wireless communication network installed in a home, or automatically adjust the brightness of the LED lamp (5200) according to the surrounding environment and situation. In addition, multiple devices (5300 to 5800) can be controlled using Li-Fi communication using visible light emitted from the LED lamp (5200).

First, the LED lamp (5200) can automatically adjust the brightness of the LED lamp (5200) based on the surrounding environment information transmitted from the gateway (5100) through the lamp communication module (5210) or the surrounding environment information collected from the sensor mounted on the LED lamp (5200). For example, the brightness of the LED lamp (5200) can be automatically adjusted depending on the type of program being broadcast on the TV (5310) or the brightness of the screen. To this end, the LED lamp (5200) can receive operation information of the TV (5310) from the lamp communication module (5210) connected to the gateway (5100). The lamp communication module (5210) can be configured as an integral part with the sensor and/or controller included in the LED lamp (5200).

In addition, when the digital door lock (5400) is locked when there is no one in the home and after a certain period of time has passed, all turned-on LED lamps (5200) can be turned off to prevent electricity waste. Alternatively, when the security mode is set via a mobile device (5800), when the digital door lock (5400) is locked when there is no one in the home, the LED lamps (5200) can be kept turned on.

The operation of the LED lamp (5200) may be controlled according to the surrounding environment information collected through various sensors connected to the network system (5000). For example, if the network system (5000) is implemented in a building, lighting and location sensors and communication modules are combined within the building to collect location information of people within the building and turn the lighting on or off, or the collected information is provided in real time to enable facility management or efficient use of idle space.

Meanwhile, by combining the LED lamp (5200) with an image sensor, a storage device, and a communication module for the lamp (5210), it can be utilized as a device capable of maintaining building security or detecting and responding to an emergency situation. For example, if a smoke or temperature detection sensor is attached to the LED lamp (5200), damage can be minimized by quickly detecting whether a fire has occurred. In addition, by controlling the brightness of the lighting in consideration of the external weather or the amount of sunlight, energy can be saved and a comfortable lighting environment can be provided.

As described above, the network system (5000) can be applied not only to closed spaces such as homes, offices, or buildings, but also to open spaces such as streets and parks. When the network system (5000) is to be applied to an open space without physical limitations, it may be relatively difficult to implement the network system (5000) due to the distance limitations of wireless communication and communication interference caused by various obstacles. By equipping each lighting fixture with a sensor and a communication module and using each lighting fixture as an information collection means and a communication mediation means, the network system (5000) can be efficiently implemented in an open environment.

FIG. 23 is a schematic diagram illustrating a network system including a light-emitting element package according to one embodiment of the present invention.

Referring to FIG. 23, an embodiment of a network system (6000) applied to an open space is shown. A network system (6000) may include a communication connection device (6100), a plurality of lighting fixtures (6120, 6150) installed at predetermined intervals and connected to communicate with the communication connection device (6100), a server (6160), a computer (6170) for managing the server (6160), a communication base station (6180), a communication network (6190) connecting communication-capable devices, and a mobile device (6200).

Each of a plurality of lighting fixtures (6120, 6150) installed in an open outdoor space such as a street or a park may include a smart engine (6130, 6140). The smart engine (6130, 6140) may include a light-emitting element for emitting light, a driving driver for driving the light-emitting element, a sensor for collecting information about the surrounding environment, and a communication module. The light-emitting element included in the smart engine may be any one of the light-emitting element packages (100, 100A, 100B) according to an embodiment of the present invention described above.

Through the above communication module, the smart engine (6130, 6140) can communicate with other surrounding devices according to the communication protocol.

In some embodiments, one smart engine (6130) can be connected to communicate with another smart engine (6140). WiFi Mesh can be applied to communication between the smart engines (6130, 6140). At least one smart engine (6130) can be connected to a communication connection device (6100) connected to a communication network (6190) by wired/wireless communication. In order to increase communication efficiency, several smart engines (6130, 6140) can be grouped together and connected to one communication connection device (6100).

The communication connection device (6100) is an access point capable of wired/wireless communication and can mediate communication between the communication network (6190) and other equipment. The communication connection device (6100) can be connected to the communication network (6190) by at least one of wired/wireless methods and, for example, can be mechanically accommodated inside one of lighting fixtures (6120, 6150).

The communication link device (6100) can be connected to a mobile device (6200) via a communication protocol. A user of the mobile device (6200) can receive surrounding environment information collected by a plurality of smart engines (6130, 6140) via the communication link device (6100) connected to a smart engine (6130) of a surrounding lighting fixture (6120). The surrounding environment information can include surrounding traffic information, weather information, etc. The mobile device (6200) can also be connected to a communication network (6190) via a wireless cellular communication method via a communication base station (6180).

Meanwhile, a server (6160) connected to a communication network (6190) can receive information collected by a smart engine (6130, 6140) mounted on each lighting fixture (6120, 6150) and simultaneously monitor the operating status of each lighting fixture (6120, 6150). In order to manage each lighting fixture (6120, 6150) based on the monitoring result of the operating status of each lighting fixture (6120, 6150), the server (6160) can be connected to a computer (6170) providing a management system. The computer (6170) can execute software capable of monitoring and managing the operating status of each lighting fixture (6120, 6150), particularly, the smart engine (6130, 6140).

FIG. 24 is a block diagram for explaining the communication operation between a smart engine of a lighting device including a light-emitting element package according to one embodiment of the present invention and a mobile device.

Referring to FIG. 24, it is a block diagram for explaining the communication operation between a smart engine (6130) of a lighting device (6120, see FIG. 23) and a mobile device (6200) via wireless communication.

Various communication methods can be applied to transmit information collected by the smart engine (6130) to the user's mobile device (6200).

Information collected by the smart engine (6130) may be transmitted to a mobile device (6200) via a communication connection device (6100, see FIG. 23) connected to the smart engine (6130), or the smart engine (6130) and the mobile device (6200) may be connected to communicate directly. The smart engine (6130) and the mobile device (6200) may communicate directly with each other via Li-Fi.

The smart engine (6130) may include a signal processing unit (6510), a control unit (6520), an LED driver (6530), a light source unit (6540), and a sensor (6550). The mobile device (6200) connected to the smart engine (6130) via visible light wireless communication may include a control unit (6410), a light receiving unit (6420), a signal processing unit (6430), a memory (6440), and an input/output unit (6450).

The signal processing unit (6510) of the smart engine (6130) can process data to be transmitted and received by visible light wireless communication. In some embodiments, the signal processing unit (6510) can process information collected by the sensor (6550) into data and transmit the data to the control unit (6520). The control unit (6520) can control the operations of the signal processing unit (6510) and the LED driver (6530), and in particular, can control the operation of the LED driver (6530) based on the data transmitted by the signal processing unit (6510). The LED driver (6530) can transmit data to the mobile device (6200) by causing the light source unit (6540) to emit light according to a control signal transmitted by the control unit (6520).

A mobile device (6200) may include a control unit (6410), a light receiving unit (6420) for recognizing visible light containing data, a signal processing unit (6430), a memory (6440) for storing data, and an input/output unit (6450) including a display, a touch screen, or an audio output unit.

The light receiving unit (6420) can detect visible light and convert it into an electric signal, and the signal processing unit (6430) can decode data included in the electric signal converted by the light receiving unit. The control unit (6410) can store the data decoded by the signal processing unit (6430) in the memory (6440) or output it through the input/output unit (6450) so that the user can recognize it.

FIG. 25 is a conceptual diagram schematically illustrating a smart lighting system including a light-emitting element package according to one embodiment of the present invention.

Referring to FIG. 25, a smart lighting system (7000) may include a lighting unit (7100), a sensor unit (7200), a server (7300), a wireless communication unit (7400), a control unit (7500), and an information storage unit (7600).

The lighting unit (7100) includes at least one lighting device within the building, and there is no limitation on the type of the lighting device. For example, it may include basic lighting, mood lighting, stand lighting, or decorative lighting in a living room, a room, a balcony, a kitchen, a bathroom, a stairway, or an entrance. The lighting device may be any one of the light-emitting element packages (100, 100A, 100B) according to an embodiment of the present invention described above.

The sensor unit (7200) is a part that detects the lighting status related to the lighting, turning on, and lighting intensity of each lighting device, outputs a signal according to the signal, and transmits the signal to the server (7300). The sensor unit (7200) may be installed in a building where the lighting device is installed, and may be placed at least once in a location where the lighting status of all lighting devices controlled by the smart lighting system can be detected, and may be installed together with each lighting device.

The information on the lighting status can be transmitted to the server (7300) in real time or transmitted in a manner of dividing it into predetermined time units. The server (7300) can be installed inside and/or outside the building, receives a signal from the sensor unit (7200), collects information on the lighting status of the lighting unit (7100) inside the building for turning it on and off, groups the collected information, defines a lighting pattern based on the information, and provides information on the defined pattern to the wireless communication unit (7400). In addition, it can serve as a medium for transmitting a command received from the wireless communication unit (7400) to the control unit (7500).

Although the drawing shows one server (7300), two or more servers may be provided as needed. The information storage unit (7600) may be a storage device accessible via a network.

The wireless communication unit (7400) is a unit that selects one of a plurality of lighting patterns provided from the server (7300) and/or the information storage unit (7600) and transmits an execution or stop command signal to the server (7300). Various portable wireless communication devices such as smartphones, tablet PCs, PDAs, and laptops that can be carried by users of the smart lighting system can be applied.

In this way, the wireless communication unit (7400) exchanges necessary commands or information signals with the server (7300) and/or the information storage unit (7600), and the server (7300) acts as an intermediary between the wireless communication unit (7400), the sensor unit (7200), and the control unit (7500), thereby operating the smart lighting system.

In addition, the smart lighting system (7000) can place an alarm device (7700) inside the building. The alarm device (7700) is for warning when there is an intruder inside the building. Specifically, when an intruder inside the building occurs and deviates from the set lighting pattern, the sensor unit (7200) detects this and transmits a warning signal to the server (7300), and the server (7300) notifies the wireless communication unit (7400) of this and transmits a signal to the control unit (7500) to activate the alarm device (7700) inside the building.

Above, the technical idea of the present invention has been described with reference to the attached drawings, but those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical idea or essential features thereof. Therefore, it should be understood that the above-described embodiments are exemplary in all respects and not restrictive.

100, 100A, 100B: Light-emitting device package
10: Body
20: Side wall
30: Semiconductor light emitting device
40: Challenge Wire
50: Wavelength converter
52: Transparent bag material
54: Green wavelength conversion material
56: First red wavelength conversion material
58: Second red wavelength conversion material

Claims (10)

A body portion including a first electrode and a second electrode;
A semiconductor light-emitting element disposed on the above body part and emitting blue light; and
A wavelength conversion unit covering the semiconductor light emitting element on the body part is included;
The wavelength conversion part includes a transparent encapsulating material and a wavelength conversion material disposed inside the transparent encapsulating material,
The wavelength conversion material comprises a green wavelength conversion material, a first red wavelength conversion material, and a second red wavelength conversion material,
The above first red wavelength conversion material is a Mn ⁴⁺ active phosphor,
The second red wavelength conversion material is a Eu ²⁺ active phosphor containing more than 0 wt% and less than or equal to 2.4 wt% of oxygen,
The weight ratio of the second red wavelength conversion material among the wavelength conversion materials is 1 wt% to 6 wt%.
Light-emitting device package. In the first paragraph,
The above first red wavelength conversion material is a K ₂ SiF ₆ :Mn ⁴⁺ phosphor,
A light emitting device package, characterized in that the weight ratio of the first red wavelength conversion material among the wavelength conversion materials is 32 wt% to 56 wt%. In the first paragraph,
The second red wavelength conversion material is (Sr,Ca)AlSi(ON) ₃ :Eu ²⁺ phosphor,
A light emitting device package, characterized in that the weight ratio of the second red wavelength conversion material among the total weight ratio of the first and second red wavelength conversion materials is 5 wt% to 10 wt%. In the third paragraph,
A light-emitting device package characterized in that it can emit red light having a peak wavelength of 595 nm to 615 nm and a half width of 78 nm or less through the second red wavelength conversion material. In the first paragraph,
A light-emitting device package characterized in that the green wavelength conversion material is a Ce ³⁺ active phosphor. In the first paragraph,
The above green wavelength conversion material is Y3(Al,Ga) ₅ O ₁₂ :Ce ³⁺ phosphor,
A light emitting device package, characterized in that the weight ratio of the green wavelength conversion material among the wavelength conversion materials is 38 wt% to 64 wt%. In the first paragraph,
A light-emitting device package, characterized in that the transparent encapsulating material comprises silicone having a refractive index of 1.41 to 1.54. In the first paragraph,
A light-emitting device package, characterized in that the semiconductor light-emitting device can emit blue light having a peak wavelength of 447 nm to 457 nm. In the first paragraph,
A light emitting device package characterized in that the wavelength conversion material is dispersed and arranged on the upper and lower portions of the transparent bag material. In the first paragraph,
A light emitting device package characterized in that the wavelength conversion material is dispersed and arranged only in the lower portion of the transparent sealing material.

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