Light emitting device and sterilization device including same

Abstract

According to an aspect of the present invention, provided is a light-emitting device comprising: an element substrate; an element housing disposed on the element substrate and including a cavity for exposing one region of the element substrate to the outside; a light-emitting element which is arranged on the element substrate and has a light-emitting surface for emitting light; and an optical unit configured to refract light from the light-emitting element and disposed on the upper side of the element housing, wherein the optical unit includes a surface, and the surface of the optical unit includes: a first region having a first curvature in a region intersecting a first virtual line extending from the center of the light-emitting element at a first angle with respect to the light-emitting surface; and a second region having a second curvature different from the first curvature in a region intersecting a second virtual line extending from the center of the light-emitting element at a second angle different from the first angle with respect to the light-emitting surface.

Description

Light-emitting device and sterilization device including the same

[0001] The present invention relates to a light-emitting device and a sterilization device including the same.

[0002] Recently, as viruses and fungi that threaten the human body have become prevalent, efforts are being made to sterilize these microorganisms to protect the human body from infection.

[0003] In particular, electronic products equipped with sterilization capabilities capable of disinfecting food-related appliances, such as water purifiers and refrigerators, are gaining popularity. Furthermore, there is an increasing demand for light sources capable of sterilizing various types of areas to ensure effective sterilization functions.

[0004] Embodiments of the present invention aim to provide a light-emitting device capable of sterilization and a sterilization device including the same.

[0005] In addition, embodiments of the present invention aim to provide a light-emitting device capable of uniformly irradiating light into a sterilization area and a sterilization device including the same.

[0006] In addition, embodiments of the present invention aim to provide a light-emitting device and a sterilization device including the same, wherein the reduction in sterilization power due to the difference in distance between the light-emitting device and the sterilization area is minimal.

[0007] In addition, embodiments of the present invention aim to provide a light-emitting device capable of automatically sterilizing and a sterilization device including the same.

[0008] According to one aspect of the present invention, a light-emitting device may be provided, comprising: a device substrate; a device housing disposed on the device substrate and including a cavity for exposing a portion of the device substrate to the outside; a light-emitting element disposed on the device substrate and having a light-emitting surface formed thereon for emitting light; and an optical device configured to refract light from the light-emitting element and disposed on the upper side of the device housing, wherein the optical device comprises a surface, and the surface of the optical device comprises a first region having a first curvature in an area intersecting a first virtual line extending from the center of the light-emitting element at a first angle with respect to the light-emitting surface; and a second region having a second curvature different from the first curvature in an area intersecting a second virtual line extending from the center of the light-emitting element at a second angle different from the first angle with respect to the light-emitting surface.

[0009] In addition, a light-emitting device may be provided in which the central region of the surface of the optical device overlaps with the light-emitting element and has the largest curvature among the regions of the surface of the optical device.

[0010] In addition, a light-emitting device may be provided in which the center of curvature of the central region is positioned above the light-emitting element.

[0011] In addition, a light-emitting device may be provided in which the edge region of the surface of the optical device is adjacent to the element housing and has the smallest curvature.

[0012] In addition, the optical device may be provided with a light-emitting device configured to refract light to have a light distribution curve having an illuminance of 50% or more at a radiation intensity distribution angle of -45° to 45°.

[0013] In addition, a light-emitting device may be provided, wherein the light distribution curve includes a plurality of main peaks.

[0014] Additionally, a plurality of main peaks may be provided, including a first main peak formed at an angle smaller than 0° of radiation intensity distribution angle; and a second main peak formed at an angle larger than 0° of radiation intensity distribution angle, and a light-emitting device may be provided.

[0015] In addition, a light-emitting device may be provided in which the intensities of the first main peak and the second main peak are different.

[0016] Additionally, a light-emitting device may be provided in which the lowest normalized intensity in the region between the first main peak and the second main peak is 0.8 times or more of the higher normalized intensity between the first main peak and the second main peak.

[0017] In addition, a light-emitting device may be provided in which the first main peak and the second main peak are formed at a radiation intensity distribution angle of -20° or more and 20° or less in the light distribution curve.

[0018] In addition, a light-emitting device may be provided in which the above light distribution curve includes one main peak at a radiation intensity distribution angle of -20° or more and 20° or less.

[0019] Additionally, a light-emitting device may be provided in which the light distribution curve includes a plurality of sub-peaks, the plurality of sub-peaks have a normalized intensity smaller than the plurality of main peaks, are formed at a radiation intensity distribution angle larger than the main peaks, and the plurality of sub-peaks are formed at a radiation intensity distribution angle of -20° or less and 20° or more.

[0020] In addition, a light-emitting device may be provided in which the normalized intensity of the plurality of subpeaks is at least 0.4 times greater than the higher normalized intensity among the plurality of main peaks.

[0021] Additionally, a light-emitting device may be provided, comprising: a device substrate; a housing including a cavity disposed on the device substrate and exposing at least one area of ​​the device substrate to the outside; a light-emitting element disposed on the one area of ​​the device substrate and generating light; an optical device configured to refract the light of the light-emitting element and supported on the upper side of the housing; and a plurality of side walls extending upward from the upper side of the housing, wherein the optical device is disposed between the plurality of side walls.

[0022] Additionally, a sterilization device may be provided comprising: a housing assembly providing a first region and a second region; a first light-emitting device generating light having a first light distribution curve to sterilize the first region; and a second light-emitting device generating light having a second light distribution curve to sterilize the second region, wherein the first light distribution curve and the second light distribution curve have main peaks at different radiation intensity distribution angles.

[0023] In addition, a sterilization device may be provided in which the first region is larger than the second region.

[0024] In addition, a sterilization device may be provided in which the first light-emitting device provides a wider radiation angle than the second light-emitting device.

[0025] In addition, a sterilization device may be provided in which the first light distribution curve includes a plurality of main peaks, and the plurality of main peaks are formed at a radiation intensity distribution angle of -30° to 20°.

[0026] In addition, a sterilization device may be provided in which the normalized intensity at a radiation intensity distribution angle of -30° to 20° of the first light distribution curve is 0.8 times or more of the higher normalized intensity among the plurality of main peaks.

[0027] In addition, a sterilization device may be provided in which the second light distribution curve includes one main peak.

[0028] One embodiment of the present invention has the effect of being able to uniformly sterilize the sterilization area.

[0029] In addition, the embodiments of the present invention have the effect of increasing the light extraction efficiency of the light-emitting device so that light can be emitted efficiently.

[0030] In addition, the embodiments of the present invention have the effect of being able to have a vivid color reproduction rate.

[0031] In addition, the embodiments of the present invention have the effect of protecting the light-emitting element from the external environment, thereby increasing reliability.

[0032] In addition, the embodiments of the present invention have the effect of enabling the realization of a high-quality light-emitting device with low chromatic aberration.

[0033] In addition, embodiments of the present invention can improve light concentration efficiency by concentrating light from a light source unit into a light irradiation area.

[0034] An embodiment of the present invention can provide a light-emitting device capable of efficiently emitting light by increasing light extraction efficiency.

[0035] An embodiment of the present invention can provide a light-emitting device that efficiently releases heat, thereby increasing heat dissipation efficiency and improving reliability.

[0036] In addition, embodiments of the present invention can provide a light-emitting device with improved brightness by controlling the direction of refraction.

[0037] FIG. 1 is a schematic diagram showing a sterilization device according to a first embodiment of the present invention.

[0038] FIG. 2 is a schematic isometric view showing a sterilization module that sterilizes a first region of the sterilization device of FIG. 1.

[0039] Figure 3 is a schematic diagram showing the sterilization module of the sterilization device of Figure 1.

[0040] FIG. 4 is a schematic diagram showing a light-emitting device included in the sterilization module of FIG. 3.

[0041] Figure 5 is a diagram showing the light distribution curve of the bladder element of the light-emitting device of Figure 1.

[0042] Figure 6 is a diagram showing the first type of light distribution curve of light generated from the light-emitting device of Figure 4.

[0043] Figure 7 is a diagram showing the second type of light distribution curve of light generated from the light-emitting device of Figure 4.

[0044] Figure 8 is a diagram showing the third type light distribution curve of light generated from the light-emitting device of Figure 4.

[0045] Figure 9 is a diagram showing the fourth type light distribution curve of light generated from the light-emitting device of Figure 4.

[0046] Figure 10 is a diagram showing the fifth type light distribution curve of light generated from the light-emitting device of Figure 4.

[0047] Figure 11 is a diagram showing the sixth type light distribution curve of light generated from the light-emitting device of Figure 4.

[0048] FIG. 12 is a drawing showing a light-emitting device of a sterilization device according to a second embodiment of the present invention.

[0049] In the following description, numerous specific details are described for the purpose of explanation and to provide a complete understanding of the various embodiments or implementations of the present disclosure. As used herein, “Embodiments” and “Implementations” are interchangeable terms indicating non-limiting examples of devices or methods utilizing one or more of the concepts of the invention disclosed herein. However, it will be apparent that various embodiments may be implemented without utilizing these specific details or by utilizing one or more equivalent arrangements. In other examples, known structures and devices are illustrated in block diagram form to avoid unnecessarily obscuring the various embodiments. Furthermore, while various embodiments may differ from one another, they do not need to be exclusive. For example, specific shapes, configurations, and characteristics of an embodiment may be used or implemented in other embodiments without departing from the scope of the concept of the invention.

[0050] Unless otherwise specified, the illustrated embodiments should be understood as providing exemplary features of varying details in some ways in which the concept of the present invention can actually be realized. Therefore, unless otherwise specified, features, components, modules, layers, membranes, panels, regions and / or modes of various embodiments (hereinafter referred to individually or collectively as “elements”) may be combined, separated, interchanged, and / or rearranged differently without departing from the scope of the concept of the present invention.

[0051] The use of cross-hatching and / or shading in the attached drawings is generally provided to clarify the boundaries between adjacent elements. As such, the presence or absence of cross-hatching or shading, unless otherwise specified, does not imply or indicate any preference or requirement regarding the specific material, material properties, dimensions, proportions, commonalities between the exemplified elements, or any other features, attributes, and characteristics of the elements. Additionally, in the attached drawings, the size and relative size of the elements may be exaggerated for clarity and / or illustrative purposes. When embodiments are implemented differently, specific process sequences may be performed differently from the described order. For example, two consecutively described processes may be performed substantially simultaneously or in an order opposite to the described order. Also, the same reference numerals indicate the same elements.

[0052] When an element such as a layer is referred to as being "on", "connected to," or "coupled to" another element or layer, said element may be directly on, connected to, or coupled to the other element or layer, or an interposed element or layer may exist. However, when an element or layer is referred to as being "directly on", "directly connected to," or "directly coupled to" another element or layer, no interposed element or layer exists. To this end, the term "connected" may refer to a physical, electrical, and / or fluid connection with or without an interposed element. Furthermore, the DR1-axis, DR2-axis, and DR3-axis are not limited to the three axes of an orthogonal coordinate system, such as the x, y, and z axes, and may be interpreted in a broader sense. For example, the DR1-axis, DR2-axis, and DR3-axis may be perpendicular to each other, or they may represent different directions that are not perpendicular to each other. For the purposes of this disclosure, “one or more of X, Y, and Z” and “one or more selected from the group consisting of X, Y, and Z” may be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z, such as, for example, XYZ, XYY, YZ, and ZZ. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed articles.

[0053] Although terms such as “first,” “second,” etc., may be used herein to describe various forms of elements, these elements shall not be limited by these terms. These terms are used to distinguish one element from another. Therefore, the first element discussed below may be named the second element without departing from the teachings of the present disclosure.

[0054] Spatially relative terms such as “below,” “under,” “immediately below,” “lower,” “above,” “upper,” “upper,” “higher,” and “side” (e.g., as in “side wall”) may be used for descriptive purposes and thereby to describe the relationship between one element and another element(s) as illustrated in the drawings. Spatially relative terms are intended to include different orientations of the device in use, operation, and / or manufacture in addition to the orientations illustrated in the drawings. For example, if the device in the drawings is inverted, the element described as “below” or “under” another element or feature will be oriented “above” the other element or feature. Therefore, the exemplary term “below” may include both upper and lower orientations. Additionally, the device may be oriented differently (e.g., rotated 90° or oriented in a different orientation), and thus, spatially relative descriptors used herein may also be interpreted accordingly.

[0055] The technical terms used in this specification are intended to describe specific embodiments and are not limiting. The singular form used in this specification also includes the plural form unless the context clearly indicates otherwise. Additionally, the terms “comprising,” “comprising,” “comprising,” and / or “comprising” used in this specification specify the presence of the mentioned features, integers, steps, operations, elements, components, and / or groups thereof, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. Furthermore, the terms “substantially,” “about,” and other similar terms used in this specification are used to indicate approximation rather than degree, and are used to describe inherent deviations of measured, calculated, and / or provided values ​​that may be recognized by a person of ordinary knowledge in the art.

[0056] Various embodiments are described below with reference to cross-sectional and / or exploded drawings, which are schematic examples of idealized embodiments and / or intermediate structures. As such, variations from the shapes in the drawings may be expected, for example, as a result of manufacturing techniques and / or tolerances. Therefore, the embodiments disclosed herein should not be interpreted as being limited to the shapes of specific illustrated regions, but should be interpreted to include, for example, deviations in shape resulting from manufacturing. In this way, the regions illustrated in the drawings may be schematic in nature, and the shapes of these regions may not reflect the actual shapes of the regions of the device, and thus are not intended to have a limiting meaning.

[0057] As is customary in the art, some embodiments may be illustrated and described in the accompanying drawings in terms of functional blocks, units, and / or modules. Those skilled in the art will understand that these blocks, units, and / or modules are physically implemented by electronic (or optical) circuits, such as logic circuits, discrete components, microprocessors, wiring circuits, memory elements, and wiring connections, formed using semiconductor-based manufacturing technology or other manufacturing technology. Where blocks, units, and / or modules are implemented by microprocessors or other similar hardware, they may be programmed and controlled using software (e.g., microcode) to perform the various functions discussed herein, and may optionally be driven by firmware and / or software. Additionally, each block, unit, and / or module may be implemented by dedicated hardware, or as a combination of dedicated hardware for performing some functions and a processor for performing other functions (e.g., one or more programmed processors and associated circuits). Additionally, each of the blocks, units, and / or modules of some embodiments may be physically separated into two or more interacting and individual blocks, units, and / or modules without departing from the scope of the concept of the present invention. Additionally, the blocks, units, and / or modules of some embodiments may be physically combined into more complex blocks, units, and / or modules without departing from the scope of the concept of the present invention.

[0058] Unless otherwise defined, all terms used herein (including technical or scientific terms) have the same meaning as commonly understood by those skilled in the art to which this disclosure pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with that meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this specification.

[0059] Hereinafter, a light-emitting device (100) according to the first embodiment of the present invention and a sterilization device (1) including the same will be described.

[0060] Referring to FIGS. 1 to 3, the sterilization device (1) may be a device for sterilizing bacteria, foreign substances, etc. The sterilization device (1) may be implemented as an ice water purifier, but is not limited thereto. The sterilization device (1) may provide a receiving space for receiving water and ice. In addition, the sterilization device (1) may sterilize water, ice and the receiving space. The sterilization device (1) may include a housing assembly (10) and a sterilization module (20).

[0061] The housing assembly (10) can support the sterilization module (20) and provide the exterior of the sterilization device (1). The housing assembly (10) may include a sterilization area (S) that is sterilized by the sterilization module (20). Additionally, the sterilization area (S) may be formed in multiple numbers. The multiple sterilization areas (S) may include a first area (Sa) and a second area (Sb). The first area (Sa) may be formed larger than the second area (Sb) and may be composed of a tank (12) to be described later. The second area (Sb) may be a flow path (14) to be described later, but is not limited thereto. The first area (Sa) and the second area (Sb) may be sterilized by the sterilization module (20). The housing assembly (10) may include a frame (11), a tank (12), a conveyor (13), and a flow path (14).

[0062] The frame (11) can form the exterior of the sterilization device (1) and can provide space for accommodating a water purification filter, an ice-making device, etc. Additionally, the frame (11) can support a tank (12), a conveyor (13), and a flow path (14). In particular, water introduced into the interior of the frame (11) can be filtered into purified water by the water purification filter and then flow into the flow path (14) or form into ice by the ice-making device.

[0063] The tank (12) can accommodate ice. The inner surface of the tank (12) may be the first region (Sa) described above. Additionally, the length of the tank (12) in the vertical direction (x-axis direction) may be formed to be longer than the length in the horizontal direction (y-axis direction). In particular, the inner surface of the tank (12) may be sterilized by a sterilization module (20). The tank (12) may be supported by a frame (11) so as to be positioned below the ice-making device and may accommodate ice that has been removed from the ice-making device. An outlet (12a) capable of discharging ice may be formed in the tank (12). The outlet (12a) may be positioned on the front side of the tank (12). Additionally, the bottom surface of the tank (12) may be sloped downward in a direction away from the outlet (12a). This slope of the bottom surface of the tank (12) prevents ice from accumulating near the outlet (12a). The sterilization module (20) can be placed on one side of the tank (12). The light emission surface of the sterilization module (20) may be tilted at a certain angle from one side of the tank (12). At this time, the angle formed between the light emission surface of the sterilization module (20) and one side of the tank (12) may be an angle of 25 degrees or more and 50 degrees or less. Through this, light is not unnecessarily emitted to areas where sterilization is not required, and light can be transmitted or concentrated intensively to specific areas where sterilization is required, thereby improving efficiency.

[0064] The conveyor (13) is positioned inside the tank (12) and can convey ice to the discharge port (12a). By means of this conveyor (13), the ice can be discharged to the outside of the housing assembly (10) and provided to the user. The conveyor (13) can be supported on the tank (12) so as to be rotatable inside the tank (12). For example, the conveyor (13) may be in the shape of a screw. The conveyor (13) can be sterilized together with the sterilization module (20) when the sterilization module (20) sterilizes the inner surface of the tank (12).

[0065] The flow channel (14) may provide a passage through which water flows. For example, the flow channel (14) may be a flow path of a faucet for discharging purified water, but is not limited thereto. The flow channel (14) may be the second region (Sb) described above. In particular, the flow channel (14) may be sterilized by a sterilization module (20). The sterilization module (20) may be positioned on one side of the flow channel (14). The light emission surface of the sterilization module (20) may be positioned substantially perpendicular to one side of the flow channel (14). At this time, the angle formed by the light emission surface of the sterilization module (20) and one side of the flow channel (14) may be an angle of 85 degrees or more and 95 degrees or less. The light emission surface of the sterilization module (20) may be positioned substantially perpendicular to the direction in which the water flows in the flow channel (14). Alternatively, the light emission surface of the sterilization module (20) may be positioned substantially parallel to the direction in which the water of the flow channel (14) flows. This ensures that light is not unnecessarily emitted to areas where sterilization is not required, and that light is delivered or concentrated to specific areas where sterilization is required, thereby increasing efficiency.

[0066] The sterilization module (20) can sterilize by generating light. In particular, the sterilization module (20) can sterilize the housing assembly (10). For example, the light emitted from the sterilization module (20) can be emitted to the sterilization area (S) of the housing assembly (10) to sterilize the sterilization area (S). Additionally, the sterilization area (S) of the housing assembly (10) sterilized by the sterilization module (20) may be positioned at a predetermined distance from the sterilization module (20). The sterilization area (S) may be named a sterilization target surface. Furthermore, the sterilization area (S) may include a first target area (S1) and a second target area (S2) as shown in FIG. 3.

[0067] The first target area (S1) may be the area closest to the sterilization module (20) among the sterilization areas (S). In other words, the first target area (S1) may be the central area of ​​the sterilization area (S). In particular, the first target area (S1) may be the area closest to the sterilization module (20) among the sterilization target surfaces. The first target area (S1) may be positioned at a distance of a first distance (a) from the sterilization module (20). Additionally, the first distance (a) may be a distance extending in a direction perpendicular to the light-emitting surface of the sterilization module (20). The first distance (a) may be approximately 228 mm, but is not limited thereto. The first distance (a) may vary depending on the shape of the housing assembly (10) or the sterilization area (S). The first distance (a) may be approximately 0.5 to 0.89 times the second distance (b) described later.

[0068] The second target area (S2) may be the area furthest from the sterilization module (20) among the sterilization areas (S). The second target area (S2) may be an edge area of ​​the sterilization area (S). The second target area (S2) may be spaced apart from the sterilization module (20) by a second distance (b). The second distance (b) and the first distance (a) may form a target angle (c). The target angle (c) may be 30° or more and 60° or less. For example, the target angle (c) may be 39°.

[0069] The sterilization area (S) may be a pre-set length based on the area horizontal to the sterilization module (20). The length of the sterilization area (S) may be approximately 370 mm, but is not limited thereto. The length of the sterilization area (S) may be changed depending on the shape of the housing assembly (10) or the sterilization area (S). Additionally, the sterilization area (S) may be positioned so that when light from the sterilization module (20) is emitted to the first target area (S1) and the second target area (S2), the first target area (S1) and the second target area (S2) have uniform illumination. The difference in illumination between the first target area (S1) and the second target area (S2) may be less than 50%. In particular, the sterilization area (S) may be sterilized uniformly.

[0070] The sterilization module (20) may be formed in multiple units. The multiple sterilization modules (20) may have different light distribution characteristics. For example, one of the multiple sterilization modules (20) may have a wide light distribution characteristic to sterilize a sterilization area (S) with a relatively large area. In addition, another of the multiple sterilization modules (20) may have a relatively narrow light distribution characteristic to sterilize a sterilization area (S) with a relatively small area. The multiple sterilization modules (20) may be placed in different areas. The light emission directions of the multiple sterilization modules (20) may be formed differently. Through this, light interference between the multiple sterilization modules (20) can be minimized, and the accumulation of light damage can be reduced, thereby increasing reliability.

[0071] A plurality of sterilization modules (20) may include a first sterilization module (20a) and a second sterilization module (20b).

[0072] The first sterilization module (20a) can be positioned at a different location from the second sterilization module (20b) to sterilize the first area (Sa) of the housing assembly (10). In particular, the first sterilization module (20a) can sterilize the inner surface of the tank (12) by generating light into the inner surface of the tank (12). Additionally, while sterilizing the inner surface of the tank (12), the first sterilization module (20a) can also sterilize ice and the conveyor (13). The first sterilization module (20a) can be positioned on the upper side of the tank (12). Furthermore, the first sterilization module (20a) can emit light in a direction spaced apart from the second sterilization module (20b). The first sterilization module (20a) can have a wider light distribution characteristic than the second sterilization module (20b) to sterilize the first area (Sa), which has a relatively large surface area.

[0073] Since the first light source module (100-1) can irradiate light to the first area (Sa) for a certain period of time, the illuminance per unit area applied to the first area (Sa) may be lower than the illuminance per unit area applied to the second area (Sb).

[0074] The second sterilization module (20b) can sterilize the second region (Sb) of the housing assembly (10). For example, the second region (Sb) can be implemented as a drain pipe, a stopper, or a flow channel (14). In particular, the second sterilization module (20b) can sterilize the flow channel (14) by generating light into the flow channel (14). The second sterilization module (20b) can be positioned above the flow channel (14) to generate light downward. The second sterilization module (20b) may have a relatively narrow light distribution characteristic to sterilize the second region (Sb), which has a relatively narrow area. The second sterilization module (20b) can provide a higher illuminance to the second region (Sb) than the first sterilization module (20b).

[0075] The sterilization module (20) may include a light-emitting device (100) and a support (200).

[0076] The light-emitting device (100) can generate light. In other words, the light-emitting device (100) can generate light to sterilize the housing assembly (10). The light-emitting device (100) can be formed to extend in one direction. In particular, the length of the light-emitting device (100) in one direction can be formed to be longer than the length in the other direction perpendicular to the one direction. Hereinafter, the length in one direction of the light-emitting device (100) is referred to as the major axis, and the length in the other direction is referred to as the minor axis. Furthermore, the light-emitting device (100) included in the first sterilization module (20a) is referred to as the first light-emitting device, and the light-emitting device (100) included in the second sterilization module (20b) is referred to as the second light-emitting device.

[0077] The first light-emitting device and the second light-emitting device may have different light distribution characteristics. The first light-emitting device may generate light for sterilizing a wide sterilization area (S), and the second light-emitting device may generate light for sterilizing a narrow sterilization area (S).

[0078] The first light-emitting device of the first sterilization module (20a) may be positioned in the first area (Sa) such that its length in one direction is arranged in the vertical direction (x-axis direction) and its length in the other direction is arranged in the horizontal direction (y-axis direction). Additionally, the first light-emitting device of the first sterilization module (20a) may irradiate light into the first area (Sa) for a certain period of time. Furthermore, the illuminance of the first light-emitting device of the first sterilization module (20a) may be lower than the illuminance of the first light-emitting device of the second sterilization module (20b) per unit area. Additionally, the first light-emitting device of the first sterilization module (20a) may emit light with a larger radiation angle than the second light-emitting device of the second sterilization module (20b).

[0079] Additionally, the second light-emitting device of the second sterilization module (20b) can irradiate light to the second area (Sb) for a shorter period of time than the first sterilization module (20a). The illuminance of the second light-emitting device of the second sterilization module (20b) may be higher than the illuminance of the first light-emitting device of the first sterilization module (20a) per unit area.

[0080] The sterilization module (20) does not include a wavelength conversion member, but the present invention is not limited thereto. The light-emitting device (100) may further include a wavelength conversion member. Additionally, at least one of the plurality of sterilization modules (20) may further include a wavelength conversion member or include a wavelength conversion material dispersed in a sealing material or a lens.

[0081] Referring further to FIG. 4, each light-emitting device (100) may include a device substrate (110), a device housing (120), a light-emitting element (130), and an optical device (140).

[0082] The device substrate (110) can support a device housing (120), a light-emitting element (130), and an optical device (140). Hereinafter, the device substrate (110) is referred to as a substrate. For example, the device substrate (110) may be a printed circuit board (PCB). Additionally, the device substrate (110) may include an alloy composed of one or more of Cu, Zn, Au, Ni, Al, Mg, Cd, Be, W, Mo, Si, Ag, and Fe, or a part thereof. However, this is merely an example, and the device substrate (110) may include one or more of FR1, CEM-1, and FR-4. Here, FR1 is a material in which copper foil and laminate paper are laminated, and CEM-1 is a material in which copper foil, glass fiber fabric, laminate paper, and glass fiber fabric are sequentially laminated. Additionally, FR-4 is a material in which copper foil and glass fiber fabric or glass fiber fabric are laminated. In addition, the device substrate (110) may include a layer made of an insulating material such as ceramics such as alumina (Al2O3), aluminum nitride (AlN), and ZTA (Zirconia Toughened Alumina), or polymer compounds such as epoxy resins, PPA (Polyphthalamide), PMMA (Polymethyl Methacrylate), LCP (Liquid Crystal Polymer), PC (Polycarbonate), PBT, PET, and silicon.

[0083] The device housing (120) may be disposed in a portion of the device substrate (110). The device housing (120) may include a cavity formed to have a predetermined depth from the upper surface downward so that a portion of the device substrate (110) is exposed to the outside. The depth of the cavity may be greater than the height of the light-emitting element (130). Additionally, the inner wall of the housing (120) forming the cavity may include an inclined surface to reflect light emitted from the light-emitting element (130) upward. A molding layer may be provided inside the device housing (120). Hereinafter, the device housing (120) is referred to as a housing. The housing (120) may be formed from various insulating materials. For example, the housing (120) may include a polymer resin such as ceramic resin, epoxy resin, silicone resin, polyimide resin, urethane resin, etc. Additionally, the housing (120) may include a reflective material for reflecting or scattering light. For example, the reflective material may include titanium oxide (TiO2), silicon oxide (SiO2), barium sulfide (BaS), barium sulfate (BaSO4), or zirconium oxide (ZrO2). In addition, the housing (120) may include a metallic material for reflecting light. For example, the housing (120) may include a metallic material such as Ag, Al, Au, or Cu.

[0084] The housing (120) and the cavity may be placed in a portion of the device substrate (110). The device substrate (110) may include electrically connected wiring. The cavity of the housing (120) may expose a portion of the device substrate (110). By means of the cavity, a light-emitting element (130) may be mounted in the portion of the exposed substrate (110) and may generate and emit light by receiving power through the wiring of the device substrate (110).

[0085] A light-emitting element (130) can be supported on a substrate (110) to generate light. The light-emitting element (130) can be electrically connected to an electrical circuit of the substrate (110) and can generate light by receiving electricity from the outside through the electrical circuit. The light-emitting element (130) can emit light to sterilize a sterilization area (S). The light emitted from the light-emitting element (130) may include light of any wavelength range that has a sterilization function. The light-emitting element (130) may include a light-emitting diode formed of a compound semiconductor. The light-emitting diode applied to the light-emitting element (130) may be any type of vertical structure, horizontal structure, or flip-chip structure. For example, the light-emitting element (130) may be a device that converts electrical energy into light, such as a light-emitting diode chip containing a light-emitting diode, a laser diode, or an organic light-emitting diode. The light-emitting element (130) can emit UVC (200nm~280nm), UVB (280nm~315nm), UVA (315nm~420nm), blue light, green light, yellow light, red light, infrared light, etc. Additionally, the light-emitting element (130) can be composed of any one of a flip chip, a lateral chip, or a vertical chip. The light-emitting surface of the light-emitting element (130) may be opposite to the surface placed on the substrate (110). This allows for a reduction in light loss caused by the substrate (110). The light-emitting element (130) may have a radiation angle of 120 degrees or more. The light-emitting pattern of the light-emitting element may have a normalized intensity of 0.8 times or more even at a radiation angle of -45 degrees or less or 45 degrees or more. Hereinafter, the normalized intensity may be referred to as intensity. An optical device (140) may be additionally placed on the upper side of the light-emitting element to adjust the radiation angle. This prevents light from being unnecessarily emitted to areas where sterilization is not required, and allows light to be delivered or concentrated to specific areas where sterilization is required.

[0086] Referring to FIG. 5, the radiation angle of the light-emitting element (130) can be measured using a goniophotometer. For the measurement of the radiation angle, the light-emitting element (130) can be placed on a PCB or a flat substrate. The radiation angle of the light-emitting element (130) or the light-emitting device (100) can be measured with the front of the light-emitting element (130) positioned at a distance of 1m from the light-emitting element (130). Additionally, the radiation angle may be the angle between the point having 50% of the luminous intensity between -90° and the reference line (0°) relative to the greatest luminous intensity, and the point having 50% of the luminous intensity between the reference line (0°) and +90°, by measuring the luminous intensity at each angle while rotating in a range of -90° to +90° relative to a virtual reference line perpendicular to the light-emitting surface of the light-emitting element (130).

[0087] The optical device (140) can be supported on the upper side of the housing (120) so as to be positioned above the light-emitting element (130). In particular, the optical device (140) can be attached to one side of the housing (120) through an adhesive. The optical device (140) can adjust the directional angle by refracting light emitted from the light-emitting element (130). The optical device (140) may have different curvatures depending on the region. In other words, the optical device (140) may be formed to have two different curvatures depending on the angle formed with the light-emitting surface of the light-emitting element (130). The optical device (140) may have a smaller curvature as the angle formed with the light-emitting surface of the light-emitting element (130) becomes smaller. More specifically, the surface of the optical device (140) may include a first region having a first curvature in an area where it meets a virtual line extending from the center of the light-emitting element (130) at a first angle with respect to the light-emitting surface, and a second region having a second curvature different from the first curvature in an area where it meets a virtual line extending from the center of the light-emitting element (130) at a second angle different from the first angle with respect to the light-emitting surface.

[0088] The optical device (140) can be formed such that the region perpendicular to the light-emitting surface of the light-emitting element (130) has the greatest curvature. The optical device (140) can be formed such that the curvature becomes smaller as the angle formed with the light-emitting surface of the light-emitting element (130) decreases. In particular, the central region of the surface of the optical device (140) located directly above the light-emitting element (130) can be formed to have the greatest curvature. The center of curvature of the central region can be positioned above the light-emitting element (130). Additionally, the edge region of the surface of the optical device (140) adjacent to the housing (120) can be formed to have the smallest curvature. Such an optical device (140) can refract light generated laterally from the light-emitting element (130) to form a narrow directional angle. Through this, light is not emitted to unnecessary areas but can be transmitted to or concentrated in a specific area.

[0089] The difference in directional angle between the optical device (140) and the light-emitting element (130) may be 60° or more. This difference may be the difference between the directional angle of the light-emitting device (100) equipped with the optical device (140) and the directional angle of the light-emitting device measured with the optical device (140) removed.

[0090] The optical device (140) can be formed from a light-transmitting transparent material such as silicone resin, epoxy resin, glass, urethane, methyl methacrylate (MMA), polystyrene, allyl diglycol carbonate resin, polycarbonate resin, polymethylmethacrylate (PMMA), Teflon resin, etc.

[0091] A support (200) can support a light-emitting device (100). For example, the light-emitting device (100) may be placed in a portion of the support (200). This support (200) may include a power connection portion for supplying power to the light-emitting device (100). Additionally, the support (200) may include a controller for controlling the operation of the light-emitting device (100).

[0092] The support (200) may further include a configuration for protecting the light-emitting device (100) from the external environment. For example, the support (200) may include a sealing portion to prevent moisture penetration. In particular, the sealing portion can prevent damage to the light-emitting device (100) caused by moisture and increase reliability.

[0093] Additionally, the support (200) may further include a reflective part that adjusts the light path of the light-emitting device (100) to reflect light into the sterilization area (S), an optic part that concentrates light, etc. Through this support (200), the sterilization module (20) can emit uniform light into the sterilization area (S).

[0094] Hereinafter, with further reference to FIGS. 6 to 11, the light distribution curve of the light-emitting device (100) will be described.

[0095] The optical device (140) may be configured so that the light-emitting device (100) has a directional angle of -45° to 45°. In particular, the optical device (140) may form a light distribution curve in which the light emitted from the light-emitting device (100) has an illuminance (intensity) of 50% or more in the range of -45° to 45° with respect to an imaginary line perpendicular to the light-emitting surface. Additionally, the light distribution curve formed from the light of the light-emitting device (100) may be formed in multiple numbers.

[0096] One of these multiple light distribution curves may represent the light intensity of light distributed along the major axis direction of the light-emitting device (100). In particular, one of the multiple light distribution curves may be a light distribution curve that provides a directional angle on a virtual first virtual plane formed by a virtual line and the major axis direction of the light-emitting device (100). Additionally, another of the multiple light distribution curves may represent the light intensity of light distributed along the minor axis direction (y-axis direction) of the light-emitting device (100). In particular, another of the multiple light distribution curves may be a light distribution curve that provides a directional angle on a virtual second virtual plane formed by a virtual line and the minor axis direction of the light-emitting device (100).

[0097] In addition, the light emitted from the light-emitting device (100) can be refracted in the optical device (140) to have a radiation angle of -45° to 45° as described above.

[0098] Additionally, the light distribution curve of the light generated from the light-emitting device (100) may be formed to have one or more main peaks. Meanwhile, the light distribution curve may be formed by the light-emitting device (100) for irradiating a constant amount of light to a sterilization area (S).

[0099] Referring to FIGS. 6 and FIGS. 7, as a first example, a plurality of main peaks may be formed in the light distribution curve. The light-emitting device (100) may generate light such that the radiant intensity distribution angle may have peaks at an angle greater than or lower than 0°.

[0100] Through this, maximum illumination can be achieved even in areas far from the first target area (S1). In particular, the second target area (S2), which is far from the sterilization module (20), can have uniform illumination. Additionally, the second target area (S2) and the first target area (S1) can have uniform illumination, and this allows for uniform illumination on both the left and right sides relative to the first target area (S2). More specifically, the sterilization module (20) can provide uniform sterilization power to the sterilization area (S).

[0101] Meanwhile, the light-emitting device (100) may have different illuminances for peaks at angles smaller than 0 and peaks at angles larger than 0 based on a radiation intensity distribution angle of 0 degrees. The difference in illuminance between these two peaks may be less than 20%.

[0102] Additionally, the light-emitting device (100) can generate light to form a sub-peak at an angle of 20° or more of radiation intensity distribution angle. This allows the illuminance in an area relatively less far from the center of the sterilization area (S) to be compensated. In particular, the sterilization module (20) can provide uniform sterilization power to the sterilization area (S).

[0103] Among the light rays emitted from the light-emitting device (100) including the optical device (140) of the first example, the light distribution curve of the light that forms a radiation angle on the first virtual plane is called the first type light distribution curve. Additionally, among the light rays emitted from the light-emitting device (100) including the optical device (140) of the first example, the light distribution curve of the light that forms a radiation angle on the second virtual plane is called the second type light distribution curve.

[0104] The first type of light distribution curve may have the greatest intensity at a radiation intensity distribution angle of -20° or more and 20° or less. Multiple main peaks of the first type of light distribution curve may be formed with different intensities. Additionally, any one of the multiple main peaks of the first type of light distribution curve may have the greatest intensity in the light distribution curve. The multiple main peaks of the first type of light distribution curve may include a first main peak (P1) and a second main peak (P2). The first main peak (P1) and the second main peak (P2) may be formed at a radiation intensity distribution angle of -20° or more and 20° or less.

[0105] The first main peak (P1) may be formed at an angle smaller than 0° of the radiation intensity distribution angle. In particular, the first main peak (P1) may be located at a radiation intensity distribution angle of -20° or more and 0° or less. The intensities of the first main peak (P1) and the second main peak (P2) may be formed differently from each other. In particular, the intensity of the first main peak (P1) may be formed to be smaller than the intensity of the second main peak (P2). The normalized intensity of the first main peak (P1) may be 0.8 or more and 1 or less. The first main peak (P1) may be formed at a location further away from the radiation intensity distribution angle of 0° than the second main peak (P2). The difference in intensity between the first main peak (P1) and the second main peak (P2) may be less than 0.2. Through this, a uniform sterilization effect can be obtained for each irradiation area of ​​the first main peak (P1) and the second main peak (P2).

[0106] The second main peak (P2) can be formed at an angle greater than 0° of radiation intensity distribution angle. In particular, the second main peak (P2) can be located at an angle of radiation intensity distribution angle of 0° or more and 20° or less. Additionally, the intensity of the second main peak (P2) can be formed to be greater than the intensity of the first main peak (P1). The normalized intensity of the second main peak (P2) can be 0.8 or more and 1 or less. Through this, a uniform sterilization effect can be obtained according to the shape of the structure.

[0107] In the first type of light distribution curve, the region between the first main peak (P1) and the second main peak (P2) can be formed concavely. Hereinafter, the region between the first main peak (P1) and the second main peak (P2) in the first type of light distribution curve is referred to as the first valley region. The normalized intensity of the first valley region may be 0.8 or greater. In other words, the lowest intensity in the region between the first main peak (P1) and the second main peak (P2) may be 0.8 times greater than the higher intensity between the first main peak (P1) and the second main peak (P2). This first valley region may be formed such that the intensity decreases from the first main peak (P1) to a predetermined reference angle, and increases from the reference angle to the second main peak (P2). In particular, the first valley region may have the smallest intensity at the reference angle. The reference angle can be located between -10° and -5° in the first type light distribution curve. This allows the intensity in the central area, which is relatively close to the target for sterilization, to be lowered, and enables the desired sterilization power to be obtained with less power by efficiently distributing light.

[0108] Additionally, multiple subpeaks may be formed in the first type light distribution curve. The multiple subpeaks may have a lower intensity than the multiple main peaks. The multiple subpeaks may be located at -20° or less and 20° or more in the first type light distribution curve. Here, the subpeak may have the highest intensity in the region where the intensity increases as it is separated from the multiple main peaks in the first type light distribution curve in the direction where the absolute value of the angle increases, and in the region where the intensity decreases adjacent to the side where the absolute value of the angle increases. The normalized intensity of the multiple subpeaks may be 0.4 times or more of the higher intensity between the first main peak (P1) and the second main peak (P2). The sterilization area (S) can be uniformly sterilized by these multiple subpeaks. The multiple subpeaks may include the first subpeak (SP1) and the second subpeak (SP2).

[0109] The first subpeak (SP1) can be formed at an angle of -30° or higher and -20° or lower. The normalized intensity of the first subpeak (SP1) can be 0.4 or higher and 0.5 or lower. The distance between the first subpeak (SP1) and the second subpeak (SP2) can be formed to be greater than the distance between the first main peak (1P) and the second main peak (P2). This provides a uniform sterilization effect even to the outer edge of the sterilization area, thereby expanding the design tolerance range for the outer area and effectively lowering the design difficulty.

[0110] The second subpeak (SP2) may be formed at an angle of 20° or more and 30° or less. The normalized intensity of the second subpeak (SP2) may be 0.4 or more and 0.5 or less. The intensities of the second subpeak (SP2) and the first subpeak (SP1) may be formed differently from each other, but are not limited thereto and may be formed identically. The difference in intensity between the second subpeak (SP2) and the first subpeak (SP1) may be 0.1 or less. This provides a uniform sterilization effect, thereby expanding the design tolerance range for the outer area and effectively lowering the design difficulty.

[0111] Referring to FIG. 7, the second type light distribution curve can be formed similarly to the first type light distribution curve. In particular, the width of the second type light distribution curve and the width of the first type light distribution curve can be similar. Additionally, a plurality of main peaks can be formed in the second type light distribution curve.

[0112] The second type of light distribution curve may have the greatest intensity at a radiation intensity distribution angle of -20° or more and 20° or less. Multiple main peaks of the second type of light distribution curve may be formed with different intensities. Multiple main peaks of the second type of light distribution curve may include a third main peak (P3) and a fourth main peak (P4). The third main peak (P3) and the fourth main peak (P4) may be formed at a radiation intensity distribution angle of -20° or more and 20° or less.

[0113] The third main peak (P3) may be formed at an angle smaller than 0° of the radiation intensity distribution angle. In particular, the third main peak (P3) may be located at a radiation intensity distribution angle of -20° or more and 0° or less. The intensities of the third main peak (P3) and the fourth main peak (P4) may be formed differently from each other. The intensity of the third main peak (P3) may be formed to be greater than the intensity of the fourth main peak (P4). The normalized intensity of the third main peak (P3) may be 0.8 or more and 1 or less. The third main peak (P3) may be formed at a location further away from the radiation intensity distribution angle of 0° than the fourth main peak (P4). The difference in intensity between the third main peak (P3) and the fourth main peak (P4) may be less than 0.2.

[0114] The fourth main peak (P4) can be formed at an angle greater than 0° of radiation intensity distribution angle. In particular, the fourth main peak (P4) can be located at an angle between 0° and 20° of radiation intensity distribution angle. Additionally, the intensity of the fourth main peak (P4) can be formed to be smaller than the intensity of the third main peak (P3). The normalized intensity of the fourth main peak (P4) can be 0.8 or greater and 1 or less.

[0115] The difference in intensity between the third main peak (P3) and the fourth main peak (P4) may be less than 0.2. This allows for a uniform sterilization effect to be obtained for each irradiation area.

[0116] In the second type of light distribution curve, the region between the third main peak (P3) and the fourth main peak (P4) may be formed concavely. Hereinafter, the region between the third main peak (P3) and the fourth main peak (P4) in the second type of light distribution curve is referred to as the second valley region. The intensity of the second valley region may be 0.8 or greater. In particular, the lowest intensity in the region between the third main peak (P3) and the fourth main peak (P4) may be 0.8 times greater than the higher intensity between the third main peak (P3) and the fourth main peak (P4). The second valley region may be formed such that the intensity decreases from the third main peak (P3) to a predetermined reference angle, and increases from the reference angle to the fourth main peak (P4). In particular, the second valley region may have the smallest intensity at the reference angle. The reference angle can be located between -10° and 10° in the second type of light distribution curve. This allows the relative intensity of the central area, which is relatively close to the target for sterilization, to be lowered, and the light can be efficiently distributed to obtain the desired sterilization power with less power.

[0117] Additionally, multiple sub-peaks may be formed in the second type light distribution curve. The multiple sub-peaks of the second type light distribution curve may have a lower intensity than the multiple main peaks of the second type light distribution curve. The multiple sub-peaks of the second type light distribution curve may be located at -20° or less and 20° or more in the second type light distribution curve. Here, the multiple sub-peaks may have the highest intensity in the region where the intensity increases as they are separated from the multiple main peaks of the second type light distribution curve in the direction where the absolute value of the angle increases, and in the region where the intensity decreases adjacent to the side where the absolute value of the angle increases. The intensity of the multiple sub-peaks may be 0.4 times or more of the higher intensity between the third main peak (P3) and the fourth main peak (P4). The sterilization area (S) can be uniformly sterilized by these multiple sub-peaks. Multiple subpeaks of the second type light distribution curve may include a third subpeak (SP3) and a fourth subpeak (SP4).

[0118] The third subpeak (SP3) can be formed at an angle of -30° or higher and -20° or lower. The normalized intensity of the third subpeak (SP3) can be 0.4 or higher and 0.5 or lower. The distance between the third subpeak (SP3) and the fourth subpeak (SP4) can be formed to be greater than the distance between the third main peak (3P) and the fourth main peak (P4). This provides a uniform sterilization effect even to the outer edge of the sterilization area, thereby expanding the design tolerance range for the outer area and effectively lowering the design difficulty.

[0119] The fourth subpeak (SP4) may be formed at an angle of 20° or more and 30° or less. The normalized intensity of the fourth subpeak (SP4) may be 0.4 or more and 0.5 or less. The intensities of the fourth subpeak (SP4) and the third subpeak (SP3) may be formed differently from each other, but are not limited thereto and may be formed identically. The difference in intensity between the fourth subpeak (SP4) and the third subpeak (SP3) may be less than 0.1. This provides a uniform sterilization effect even to the outer edge of the sterilization area, thereby expanding the design tolerance range for the outer area and effectively lowering the design difficulty.

[0120] To implement the first type light distribution curve or the second type light distribution curve, the height of the optical device (140) may be at least twice the height of the major axis of the light-emitting surface of the light-emitting element (130). More specifically, it may be at least three times and no more than four times the height. Alternatively, the lower surface area of ​​the optical device (140) may be at least 20 times that of the light-emitting element (130). Alternatively, the radius of curvature in the region corresponding to the light-emitting surface of the light-emitting element (130) at the center of the optical device (140) may be longer than the length of one axis of the light-emitting surface. More specifically, it may be at least twice the length. Furthermore, the center of the radius of curvature of the optical device (140) may be positioned in a region higher than the lower surface of the optical device (140). For example, the height from the lower surface of the optical device (140) to the highest point may be higher than the radius of the bottom of the optical device (140).

[0121] The difference between the first type light distribution curve and the second type light distribution curve may vary depending on the direction of the light-emitting element (130). The first type light distribution curve may be a measurement of the radiation angle from the first electrode of the light-emitting element (130) toward the second electrode. The second type light distribution curve may be a measurement of the radiation angle from the first electrode of the light-emitting element toward a single plane perpendicular to the direction in which the second electrode is positioned.

[0122] Referring to FIGS. 8 and 9, in a second example, the light-emitting device (100) can generate light in which a single main peak is formed in the light distribution curve. The light-emitting device (100) can have a maximum normalized light intensity (main peak) at an angle of -10° or greater and less than 10° relative to a radiation intensity distribution angle of 0°. The light-emitting device (100) can generate light having a narrow directional angle. Such a light-emitting device (100) can increase sterilization power by concentrating high light into a relatively narrow sterilization area (S) through the narrow directional angle.

[0123] The light-emitting device (100) can generate light that may have a sub-peak at an angle of -20° to 20°. The sub-peak may have a light intensity lower than the maximum normalized light intensity. The light intensity at the sub-peak may have a light intensity of 60% or more and less than 80% compared to the maximum peak. The light-emitting device (100) can provide sufficient sterilization power to the second target area (S2) separated from the first target area (S1) through the sub-peak.

[0124] The light distribution curve of the light that forms a radiation angle on a first virtual plane among the light emitted from the light-emitting device (100) including the optical device (140) of the second example is called the third type light distribution curve. Additionally, the light distribution curve of the light that forms a radiation angle on a second virtual plane among the light emitted from the light-emitting device (100) including the optical device (140) of the second example is called the fourth type light distribution curve.

[0125] A fifth main peak (P5) may be formed in the third type of light distribution curve. The third type of light distribution curve may have the greatest intensity at a radiation intensity distribution angle of -10° or more and less than 10°. In particular, the fifth main peak (P5) may be formed at a radiation intensity distribution angle of -10° or more and less than 10°. Due to the characteristics of this third type of light distribution curve, the light emitted from the optical device (140) may have a narrow radiation angle, so a small area can be sterilized intensively. Specifically, when the sterilization area (S) is formed small, the light emitted from the optical device (140) can sterilize the small sterilization area (S) intensively. The normalized intensity of the fifth main peak (P5) may be 0.9 or more and 1 or less. The region where the fifth main peak (P5) maintains a normalized intensity of 0.9 or more and 1 may be extended over an angle width of 5 degrees or more. This allows light to be uniformly irradiated onto a narrow sterilization area (S).

[0126] Additionally, a plurality of subpeaks smaller than the fifth main peak (P5) may be formed in the third type light distribution curve. The plurality of subpeaks may be formed at angles of -30° or less and 30° or more. Furthermore, the plurality of subpeaks may have the highest intensity in the region where the intensity increases as they are separated from the fifth main peak (P5) in the direction where the absolute value of the angle increases, and in the region where the intensity decreases adjacent to the side where the absolute value of the angle increases. Additionally, the intensity of the plurality of subpeaks may be 0.6 or more and 0.8 or less. The sterilization region (S) can be uniformly sterilized by these plurality of subpeaks. The plurality of subpeaks may include the fifth subpeak (SP5) and the sixth subpeak (SP6).

[0127] The fifth subpeak (SP5) can be formed at a radiation intensity distribution angle of -25° or greater and -10° or less. The intensity of the fifth subpeak (SP5) and the intensity of the sixth subpeak (SP6) can be formed differently. In particular, the intensity of the fifth subpeak (SP5) can be formed to be greater than the intensity of the sixth subpeak (SP6). The difference between the intensity of the fifth subpeak (SP5) and the intensity of the sixth subpeak (SP6) can be 0.1 or less. This allows the design tolerance range to be widened and the design difficulty to be effectively reduced.

[0128] Referring to FIG. 9, the sixth subpeak (SP6) can be formed at a radiation intensity distribution angle of 10° or more and 25° or less. The intensity of the sixth subpeak (SP6) can be formed to be smaller than the intensity of the fifth subpeak (SP5). Additionally, the sixth subpeak (SP6) can be located closer to 0° than the fifth subpeak (SP5).

[0129] A sixth main peak (P6) may be formed in the fourth type light distribution curve. The fourth type light distribution curve may be formed similarly to the third type light distribution curve. The width of the fourth type light distribution curve may be similar to the width of the third type light distribution curve. The third type light distribution curve may have the greatest intensity at a radiation intensity distribution angle of -10° or more and less than 10°. In particular, the sixth main peak (P6) may be formed at a radiation intensity distribution angle of -10° or more and less than 10°. The intensity of the sixth main peak (P6) may be the same as the intensity of the fifth main peak (P5). The normalized intensity of the sixth main peak (P6) may be 0.9 or more and 1 or less. Due to these characteristics of the fourth type light distribution curve, the light emitted from the optical device (140) may have a narrow radiation angle, so a small area can be sterilized intensively. In other words, when the sterilization area (S) is formed small, the light emitted from the optical device (140) can intensively sterilize the small sterilization area (S). The sixth main peak (P6) can be extended over an angle width of 10 degrees or more, in which the normalized intensity is maintained at 0.9 or higher and 1. This allows light to be uniformly irradiated onto the narrow sterilization area (S).

[0130] Additionally, a plurality of subpeaks smaller than the sixth main peak (P6) may be formed in the third type light distribution curve. The plurality of subpeaks may be formed at angles ranging from -10° or less to 10° or more. Furthermore, the plurality of subpeaks may have the highest intensity in the region where the intensity increases as they are separated from the sixth main peak (P6) in the direction where the absolute value of the angle increases, and in the region where the intensity decreases adjacent to the side where the absolute value of the angle increases. Additionally, the normalized intensity of the plurality of subpeaks may be 0.5 or more and 0.7 or less. The sterilization region (S) can be uniformly sterilized by these plurality of subpeaks. The plurality of subpeaks may include a seventh subpeak (SP7) and an eighth subpeak (SP8).

[0131] The seventh subpeak (SP7) can be formed at a radiation intensity distribution angle of -25° or greater and -15° or less. The intensities of the seventh subpeak (SP7) and the eighth subpeak (SP8) can be formed differently from each other. In particular, the intensity of the seventh subpeak (SP7) can be formed to be greater than the intensity of the eighth subpeak (SP8).

[0132] The eighth subpeak (SP8) can be formed at a radiation intensity distribution angle of 15° or more and 25° or less. The intensity of the eighth subpeak (SP8) can be formed to be smaller than the intensity of the seventh subpeak (SP7). Additionally, the eighth subpeak (SP8) can be located closer to 0° than the seventh subpeak (SP7).

[0133] To implement a third type light distribution curve or a fourth type light distribution curve, the height of the optical device (140) may be at least twice and less than three times the height of the major axis of the light-emitting surface of the light-emitting element (130). If the light-emitting element (130) is rectangular, the height may be at least 1.5 times and less than two times the minor axis. Alternatively, the lower surface area of ​​the optical device (140) may be at least nine times that of the light-emitting element (130). Alternatively, in one region between the center of the optical device (140) and the region corresponding to the light-emitting surface of the light-emitting element (130), the radius of curvature may be shorter than the length of one major axis of the light-emitting surface. Furthermore, the center of the radius of curvature of the optical device (140) may be placed in a region higher than the lower surface of the optical device (140). For example, the height from the lower surface of the optical device (140) to the highest point may be higher than the radius of the bottom of the optical device (140).

[0134] The difference between the third type light distribution curve and the fourth type light distribution curve may vary depending on the direction of the light-emitting element (130). The third type light distribution curve may be a measurement of the radiation angle from the first electrode to the second electrode direction of the light-emitting element (130). The third type light distribution curve may be a measurement of the radiation angle in the direction of the major axis of the light-emitting element (130). The fourth type light distribution curve may be a measurement of the radiation angle in a single plane direction perpendicular to the direction in which the second electrode is positioned from the first electrode of the light-emitting element (130). The fourth type light distribution curve may be a measurement of the radiation angle in the direction in which the minor axis of the light-emitting element (130) is positioned.

[0135] Referring to FIGS. 10 and 11, in a third example, the optical device (140) can refract light so that a plurality of main peaks are formed in the light distribution curve. The intensity of the plurality of main peaks may be the same or different from each other. The light distribution curve of light that forms a radiation angle on a first virtual plane among the light emitted from the light-emitting device (100) including the optical device (140) of the third example is called the fifth type light distribution curve. In addition, the light distribution curve of light that forms a radiation angle on a second virtual plane among the light emitted from the light-emitting device (100) including the optical device (140) of the fourth example is called the sixth type light distribution curve.

[0136] In addition, the fifth type light distribution curve and the sixth type light distribution curve can be formed differently from each other. In other words, the distance between multiple main peaks in the fifth type light distribution curve can be formed to be greater than the distance between multiple main peaks in the sixth type light distribution curve. In other words, the radiation angle of the light distributed along the major axis of the light of the third example light-emitting device (100) can be formed to be greater than the radiation angle of the light distributed along the minor axis.

[0137] The fifth type of light distribution curve may have the greatest intensity at a radiation intensity distribution angle of -30° or more and 10° or less. The intensities of multiple main peaks of the fifth type of light distribution curve may be formed differently or identically. The multiple main peaks of the fifth type of light distribution curve may include a seventh main peak (P7) and an eighth main peak (P8). The seventh main peak (P7) and the eighth main peak (P8) may be formed at -30° or more and 10° or less in the fifth type of light distribution curve.

[0138] The seventh main peak (P7) can be formed at an angle smaller than 0° of the radiation intensity distribution angle. In particular, the seventh main peak (P7) can be located between -30° and 20°. The intensities of the seventh main peak (P7) and the eighth main peak (P8) can be formed differently from each other. Specifically, the intensity of the seventh main peak (P7) can be formed to be smaller than the intensity of the eighth main peak (P8). The normalized intensity of the seventh main peak (P7) can be 0.8 or greater and 1 or less. The seventh main peak (P7) can be positioned further away from the radiation intensity distribution angle 0° than the eighth main peak (P8). The difference in intensity between the seventh main peak (P7) and the eighth main peak (P8) can be less than 0.2. In addition, the difference in normalized intensity between the 7th main peak (P7) and the 8th main peak (P8) may be less than 0.1. This allows the design tolerance range to be widened and the design difficulty to be effectively reduced.

[0139] The eighth main peak (P8) can be formed at an angle greater than 0° of radiation intensity distribution angle. In other words, the eighth main peak (P8) can be located at an angle greater than 0° and less than 10° of radiation intensity distribution angle. Additionally, the intensity of the eighth main peak (P8) can be formed to be greater than the intensity of the seventh main peak (P7). The normalized intensity of the eighth main peak (P8) can be greater than 0.9 and less than 1.

[0140] Additionally, the region between the 7th main peak (P7) and the 8th main peak (P8) in the 5th type light distribution curve may be formed concavely. Hereinafter, the region between the 7th main peak (P7) and the 8th main peak (P8) in the 5th type light distribution curve is referred to as the 3rd valley region. The normalized intensity of the 3rd valley region may be 0.8 or greater. In particular, the lowest intensity in the region between the 7th main peak (P7) and the 8th main peak (P8) may be 0.8 times greater than the higher intensity between the 7th main peak (P7) and the 8th main peak (P8). The 3rd valley region may be formed such that the intensity decreases from the 7th main peak (P7) to a predetermined reference angle, and increases from the predetermined reference angle to the 8th main peak (P8). In particular, the 3rd valley region may have the smallest intensity at the reference angle. The reference angle of the third valley region can be located between -5° and 5° in the fifth type light distribution curve. Additionally, the width of the third valley region can be formed to be larger than the width of the fourth valley region described later.

[0141] Referring to FIG. 11, the sixth type light distribution curve may have the greatest intensity at -10° or greater and 5° or less. The intensities of the multiple main peaks of the sixth type light distribution curve may be different or identical to each other. The multiple main peaks of the sixth type light distribution curve may include the ninth main peak (P9) and the tenth main peak (P10).

[0142] The ninth main peak (P9) can be formed at an angle smaller than 0° of the radiation intensity distribution angle. In particular, the ninth main peak (P9) can be located between -10° and 0°. The intensities of the ninth main peak (P9) and the tenth main peak (P10) can be formed differently. In other words, the intensity of the ninth main peak (P9) can be formed to be greater than the intensity of the tenth main peak (P10). The normalized intensity of the ninth main peak (P9) can be between 0.9 and 1. The difference in intensity between the ninth main peak (P9) and the tenth main peak (P10) can be less than 0.1. This allows the design tolerance range to be widened and the design difficulty to be effectively reduced. The ninth main peak (P9) can be positioned further away from the radiation intensity distribution angle of 0° than the tenth main peak (P10). The difference in intensity between the 9th main peak (P9) and the 10th main peak (P10) may be less than 0.2. This allows the narrow sterilization area (S) to be sterilized uniformly.

[0143] The 10th main peak (P10) may be formed at an angle greater than 0° of radiation intensity distribution angle. In particular, the 10th main peak (P10) may be located at an angle of radiation intensity distribution angle of 0° or more and 5° or less. Additionally, the intensity of the 10th main peak (P10) may be formed to be smaller than the intensity of the 9th main peak (P9). The normalized intensity of the 10th main peak (P10) may be 0.8 or more and 1 or less.

[0144] Additionally, the region between the ninth main peak (P9) and the tenth main peak (P10) in the sixth type light distribution curve may be formed concavely. Hereinafter, the region between the ninth main peak (P9) and the tenth main peak (P10) in the sixth type light distribution curve is referred to as the fourth valley region. The normalized intensity of the fourth valley region may be 0.8 or greater. In particular, the lowest intensity in the region between the ninth main peak (P9) and the tenth main peak (P10) may be 0.8 times greater than the higher intensity between the ninth main peak (P9) and the tenth main peak (P10). The fourth valley region may be formed such that the intensity decreases from the ninth main peak (P9) to a predetermined reference angle, and increases from the reference angle to the tenth main peak (P10). In particular, the fourth valley region may have the smallest intensity at a predetermined reference angle. The reference angle of the fourth valley region can be located between -5° and 0° in the sixth type light distribution curve. Additionally, the width of the fourth valley region can be formed to be smaller than the width of the third valley region. This allows the design tolerance range to be expanded and the design difficulty to be effectively reduced.

[0145] To implement the 5th type light distribution curve or the 6th type light distribution curve, the height of the optical device (140) may be at least twice and less than three times the height of the major axis of the light-emitting surface of the light-emitting element (130). If the light-emitting element (130) is rectangular, the height may be at least twice and less than four times the minor axis. Alternatively, the lower surface area of ​​the optical device (140) may be at least 10 times that of the light-emitting element (130). Alternatively, in one region between the center of the optical device (140) and the region corresponding to the light-emitting surface of the light-emitting element (130), the radius of curvature may be shorter than the length of one major axis of the light-emitting surface. Furthermore, the center of the radius of curvature of the optical device (140) may be placed in a region higher than the lower surface of the optical device (140). As a method to implement this, the height from the lower surface of the optical device (140) to the highest point may be higher than the radius of the bottom of the optical device (140).

[0146] The difference between the 5th type light distribution curve and the 6th type light distribution curve may vary depending on the direction of the light-emitting element (130). The 5th type light distribution curve may be a measurement of the radiation angle from the first electrode to the second electrode direction of the light-emitting element (130). The 5th type light distribution curve may be a measurement of the radiation angle in the direction of the major axis of the light-emitting element (130). The 6th type light distribution curve may be a measurement of the radiation angle in a single plane direction perpendicular to the direction in which the second electrode is arranged from the first electrode of the light-emitting element. The 6th type light distribution curve may be a measurement of the radiation angle in the direction in which the minor axis of the light-emitting element is arranged.

[0147] Meanwhile, the first light-emitting device of the first sterilization module (20a) can emit light having a first light distribution curve for sterilizing the first region (Sa). The first light distribution curve may include a fifth type light distribution curve and a sixth type light distribution curve, but is not limited thereto, and may include a first type light distribution curve and a second type light distribution curve. In particular, the first light-emitting device of the first sterilization module (20a) can generate light to form a fifth type light distribution curve and a sixth type light distribution curve. This first light-emitting device can emit light having a wide radiation angle in the vertical direction corresponding to the shape of the tank (12) and emit light having a narrow radiation angle in the horizontal direction. Accordingly, the first light-emitting device can efficiently sterilize the tank (12), which has a long vertical length and a narrow horizontal length. The first light distribution curve may have multiple main peaks formed at -30° to 20°. In addition, the intensity of the first light distribution curve at -30° to 20° may be 0.8 times or more of the higher intensity among the plurality of main peaks.

[0148] The second light-emitting device of the second sterilization module (20b) can generate light having a second light distribution curve for sterilizing the second region (Sb). The second light distribution curve may include a third type light distribution curve and a fourth type light distribution curve. In particular, a main peak may be formed in the second light distribution curve. The main peak of the second light distribution curve may be formed at -10° to 10°.

[0149] Hereinafter, the operation and effect of the light-emitting device (100) according to the first embodiment of the present invention and the sterilization device (1) including the same will be described.

[0150] In the first embodiment of the present invention, the light-emitting device (100) can sterilize a sterilization area (S). In particular, the first sterilization module (20a) can sterilize the tank (12) by generating light. The second sterilization module (20b) can sterilize the flow path (14) by generating light.

[0151] The light-emitting device (100) can have a vivid color reproduction rate.

[0152] In addition, the light-emitting device (100) can protect the light-emitting element (130) from the external environment, so reliability can be increased.

[0153] In addition, the light-emitting device (100) can be formed as a high-quality light-emitting device with low chromatic aberration.

[0154] In addition, the light-emitting device (100) can efficiently sterilize a first region (Sa) formed with different lengths in the vertical direction and vertical direction.

[0155] Hereinafter, with reference to FIG. 12, a light-emitting device (100) according to a second embodiment of the present invention and a sterilization device (1) including the same will be described. In describing the second embodiment, there is a difference in that the light-emitting device (100) further includes a side wall (150), and this difference will be explained mainly.

[0156] The side wall (150) may extend upward from the upper side of the element housing (120). An optical device (140) may be positioned on the inner side of this side wall (150). The side wall (150) may reflect light emitted from the optical device (140) upward. The height of the side wall (150) may be smaller than the height of the optical device (140). Additionally, the edge of the optical device (140) may be positioned by the side wall (150) so that it is closer to the inner side of the element housing (120) than to the outer side. This side wall (150) may protect the optical device (140) from external impact.

[0157] The optical device (140) of the second embodiment may have a cross-sectional area smaller than the outer surface of the housing (120). Additionally, the optical device (140) may have the smallest radius of curvature in the region that overlaps vertically with the light-emitting surface of the light-emitting element (130). Through this, a light-emitting device having a third to fifth type light distribution curve can be realized.

[0158] Hereinafter, the operation and effects of a light-emitting device (100) and a sterilization device (1) including the same according to the second embodiment of the present invention will be described.

[0159] The side wall (150) can reflect the light emitted from the optical device (140) upward, thereby increasing the light extraction efficiency.

[0160] In addition, the side wall (150) can protect the optical device (140).

[0161] In addition, the light-emitting device (100) can sterilize the sterilization area uniformly.

[0162] In addition, the light-emitting device (100) can efficiently emit light by increasing the light extraction efficiency.

[0163] In addition, the light-emitting device (100) can have a vivid color reproduction rate.

[0164] In addition, the light-emitting device (100) can increase reliability by protecting the light-emitting element (130) from the external environment.

[0165] In addition, the light-emitting device (100) can reduce chromatic aberration and enable the implementation of a high-quality light-emitting device.

[0166] In addition, the light-emitting device (100) can improve light concentration efficiency by concentrating the light emitted from the light-emitting element (130) into a light irradiation area.

[0167] In addition, the light-emitting device (100) can efficiently emit light by increasing the light extraction efficiency.

[0168] In addition, the reliability of the light-emitting device (100) can be improved by efficiently releasing heat to increase heat dissipation efficiency.

[0169] In addition, the brightness of the light-emitting device (100) can be improved by adjusting the direction of light refraction.

[0170] Although the embodiments of the present invention have been described above as specific embodiments, they are merely examples and the present invention is not limited thereto, but should be interpreted as having the broadest scope in accordance with the technical concept disclosed in this specification. Those skilled in the art may implement patterns of shapes not specified by combining or substituting the disclosed embodiments, and this also does not deviate from the scope of the present invention. Furthermore, those skilled in the art may easily modify or alter the disclosed embodiments based on this specification, and it is evident that such modifications or alterations also fall within the scope of the rights of the present invention.

Claims

1. Substrate; A device housing disposed on the device substrate and including a cavity for exposing a portion of the device substrate to the outside; A light-emitting element disposed on the above-mentioned element substrate and having a light-emitting surface formed thereon that emits light; and It includes an optical device configured to refract light from the light-emitting element and positioned on the upper side of the element housing, and The above optical device includes a surface, The surface of the above optical device is, A first region having a first curvature in an area intersecting a first virtual line extending at a first angle with respect to the light-emitting surface from the center of the light-emitting element; and A second region having a second curvature different from the first curvature in an area intersecting a second virtual line extending from the center of the light-emitting element at a second angle different from the first angle with respect to the light-emitting surface. Light-emitting device.

2. In Paragraph 1, The central region of the surface of the optical device overlaps with the light-emitting element and has the largest curvature among the regions of the surface of the optical device, Light-emitting device.

3. In Paragraph 2, The center of curvature of the above central region is positioned above the light-emitting element, Light-emitting device.

4. In Paragraph 1, The edge region of the surface of the optical device is adjacent to the element housing and has the smallest curvature, Light-emitting device.

5. In Paragraph 1, The above optical device is, Configured to refract light to have a light distribution curve having an illuminance of 50% or more at a radiation intensity distribution angle of -45° to 45°, Light-emitting device.

6. In Paragraph 5, The above light distribution curve includes a plurality of main peaks, Light-emitting device.

7. In Paragraph 6, Multiple main peaks are, A first main peak formed at an angle smaller than 0° of radiation intensity distribution angle; It includes a second main peak formed at an angle greater than 0° of radiation intensity distribution angle, and Light-emitting device.

8. In Paragraph 7, The intensities of the first main peak and the second main peak are different, Light-emitting device.

9. In Paragraph 7, The lowest normalized intensity in the region between the first main peak and the second main peak is at least 0.8 times the higher normalized intensity between the first main peak and the second main peak, Light-emitting device.

10. In Paragraph 7, The first main peak and the second main peak are formed at a radiation intensity distribution angle of -20° or more and 20° or less in the light distribution curve, Light-emitting device.

11. In Paragraph 5, The above photometric curve includes a single main peak at a radiation intensity distribution angle of -20° or more and 20° or less, Light-emitting device.

12. In Paragraph 6, The above light distribution curve includes a plurality of subpeaks, and The plurality of subpeaks have a normalized intensity smaller than the plurality of main peaks and are formed at a radiation intensity distribution angle larger than that of the main peaks, and Multiple subpeaks are formed at radiation intensity distribution angles of -20° or less and 20° or more, Light-emitting device.

13. In Paragraph 12, The normalized intensity of the plurality of subpeaks is at least 0.4 times the higher normalized intensity among the plurality of main peaks, Light-emitting device.

14. Substrate; A housing comprising a cavity disposed on the above-mentioned device substrate and exposing at least one region of the above-mentioned device substrate to the outside; A light-emitting element disposed in the above-mentioned area of ​​the above-mentioned element substrate and generating light; An optical device configured to refract light from the light-emitting element and supported on the upper side of the housing; and It further includes a plurality of side walls extending upward from the upper side of the above housing, and The optical device is disposed between the plurality of side walls, Light-emitting device.

15. A housing assembly providing a first region and a second region; A first light-emitting device that generates light having a first light distribution curve to sterilize the first region; and To sterilize the above-mentioned second region, it includes a second light-emitting device that generates light having a second light distribution curve, and The above first and second light distribution curves have main peaks at different radiation intensity distribution angles, Sterilization device.

16. In Paragraph 15, The first region above is larger than the second region, Sterilization device.

17. In Paragraph 15, The first light-emitting device above provides a wider radiation angle than the second light-emitting device, Sterilization device.

18. In Paragraph 15, The above first light distribution curve includes a plurality of main peaks, and The above plurality of main peaks are formed at a radiation intensity distribution angle of -30° to 20°, Sterilization device.

19. In Paragraph 15, The normalized intensity of the first photometric curve at a radiation intensity distribution angle of -30° to 20° is at least 0.8 times the higher normalized intensity among the plurality of main peaks, Sterilization device.

20. In Paragraph 15, The above second light distribution curve includes one main peak, Sterilization device.

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