KR20200036311A - Light irradiation module and air cleaning apparatus including the same - Google Patents

Abstract

An objective of the present invention is to provide a light source module and an air cleaner including the same, which can emit uniform light towards a side of a module. According to embodiments of the present invention, the light source module comprises: a printed circuit board; a plurality of light-emitting elements arranged on the printed circuit board; and an optical lens which is arranged on the plurality of light-emitting elements, and includes a protrusion unit. The protrusion unit is formed around a circumference of a concentric circle shape from the center of the printed circuit board. The protrusion unit includes a first recess which is concave in an upward direction from the lower surface, and is formed around a circumference of a concentric circle shape from the center of the printed circuit board. The plurality of light-emitting elements are separated from each other and are arranged in the first recess. The protrusion unit has a perpendicular normal line perpendicular to the upper surface of the printed circuit board on a center area of the first recess. The perpendicular normal line is close to the center of the printed circuit board compared to an optical axis of the light-emitting elements based on the horizontal direction. Also, according to embodiments of the present invention, the air cleaner comprises: a housing having a cylindrical shape and including a suction unit on the outer circumferential surface thereof; a discharge unit positioned in an upper portion of the housing; a light source module arranged in the housing; a filter member which has a cylindrical shape in the housing, and is arranged between the suction unit and the light source module; and an air blowing member which is arranged in the housing, and moves air passing through the filter unit to the discharge unit. The light source module includes the aforementioned light source module. The filter member includes a first filter unit and a second filter unit arranged in the first filter unit and facing the light source module. The second filter unit includes a photocatalyst filter. The light source module emits light to the second filter unit.

Description

LIGHT IRRADIATION MODULE AND AIR CLEANING APPARATUS INCLUDING THE SAME

This embodiment relates to a light source module and an air purifier comprising the same.

As interest in the environment and health increases, demand for air cleaners is increasing. An air purifier is a device that inhales external air with a fan and removes contaminants using an internal filter, and exhausts air to the outside. It can collect fine dust or bacteria and deodorize odors. The air purifier may be provided with various filters therein. For example, the air purifier includes a pre-filter that filters relatively large dust, a ultra-fine dust, and a heap-filter that filters various bacteria, and a photocatalyst filter is further disposed to antibacterial And deodorization.

The air purifier generally has a square box shape, and the filter disposed therein has a flat plate shape corresponding to the square box shape. The photocatalyst filter is a filter that reacts with ultraviolet rays incident on the surface to purify the air, and generally has a flat plate shape so that ultraviolet rays are uniformly incident on the surface.

Recently, air cleaners of various shapes are required according to customer requirements, and accordingly, filters disposed therein also require shapes corresponding to the air cleaners. For example, when the air cleaner is manufactured in a cylindrical shape, the filter inside is also required in a cylindrical shape, thereby improving the surface area to maximize the air cleaning effect. However, when the filter, for example, the photocatalyst filter is manufactured in a cylindrical shape, it is difficult to uniformly irradiate ultraviolet rays on the entire surface of the photocatalyst filter, and only a specific surface is irradiated with ultraviolet rays, thereby purifying air through the photocatalyst filter, antibacterial action, The decomposition and deodorizing effects of harmful substances may be reduced.

In addition, when the light source module is disposed at the bottom to irradiate ultraviolet rays to the entire photocatalyst filter having a cylindrical shape, ultraviolet rays emitted from the light source module may be emitted to the outlet, which may be harmful to the user's body.

Therefore, there is a need for a light source module and an air purifier having a new structure capable of solving the above-mentioned problems.

The embodiment is to provide a light source module capable of emitting uniform light in the lateral direction of the module and an air cleaner including the same.

In addition, the embodiment is to provide a light source module that can prevent the light emitted from the light emitting device is emitted to the upper direction of the module.

In addition, an embodiment is to provide a light source module capable of uniformly irradiating light inside a filter of a cylinder provided in an air cleaner and an air cleaner including the same.

In addition, an embodiment of the present disclosure is to provide a light source module and an air cleaner including the same, which can prevent light emitted from the light source module inside the air cleaner from being emitted outside the air cleaner.

The light source module according to the embodiment includes a circuit board, a plurality of light emitting elements disposed on the circuit board, and an optical lens disposed on the plurality of light emitting elements and including a protrusion, wherein the protrusion is from the center of the circuit board. It is formed along the circumference of the concentric circle shape, the protrusion is concave in the upper direction from the lower surface, and includes a first recess formed along the circumference of the concentric circle shape from the center of the circuit board, the plurality of light emitting elements are spaced apart from each other And is disposed in the first recess, and the protrusion has a vertical normal perpendicular to the top surface of the circuit board in the central region of the first recess, wherein the vertical normal is an optical axis of the light emitting device based on a horizontal direction. More adjacent to the center of the circuit board.

In addition, the air purifier according to the embodiment has a cylindrical shape, a housing including a suction portion on an outer circumferential surface, a discharge portion located above the housing, a light source module disposed inside the housing, having a cylindrical shape in the housing, and the suction portion And a filter member disposed between the light source modules and a blowing member disposed inside the housing to flow air passing through the filter unit to the outlet, wherein the light source module includes the above-described light source module, and the filter member Is disposed inside the first filter unit and the first filter unit, and includes a second filter unit facing the light source module, the second filter unit includes a photocatalytic filter, and the light source module emits light to the second filter unit. Investigate.

The light source module according to the embodiment may control the direction of the emitted light. In detail, an optical lens may be disposed on the light emitting element to emit light in a lateral direction of the module, and emit light in a 360 degree direction of the module.

Further, the optical lens of the light source module according to the embodiment may include a first protrusion located outside the module and a second protrusion located inside the module based on a vertical normal in the central region of the first recess. At this time, the first protrusion and the second protrusion have an asymmetric shape with each other, thereby preventing light emitted from the light source module from being re-incident or reflected to the light source module. That is, by controlling the angle of light emitted from the upper surface of the second projection, it is possible to minimize the re-reflection of the emitted light to the light source module or to the upper surface of the adjacent second projection. Accordingly, the light source module according to the embodiment may have improved light efficiency.

In addition, the light source module according to the embodiment may be applied to an air cleaner to decompose harmful substances. In detail, the light source module is disposed inside an air purifier having a cylindrical photocatalyst filter to uniformly irradiate light to the inner surface of the filter.

In addition, the light source module according to the embodiment may prevent light from being emitted in the upper direction of the light source module by the optical lens. Accordingly, when the light source module is disposed on the inner bottom surface of the air cleaner, light emitted from the light source module can be prevented from being emitted toward the upper direction of the air cleaner, and the user is prevented from being exposed to ultraviolet rays. can do.

1 is an exploded perspective view of a light source module according to an embodiment.
2 is a perspective view of a light source module according to an embodiment.
3 is a plan view of a light source module according to an embodiment.
4 is a bottom view of a light source module according to an embodiment.
5 is a cross-sectional view AA 'of the light source module of FIG. 3 according to an embodiment.
6 is an enlarged view of an area A1 of FIG. 5 enlarged.
7 is a cross-sectional view showing an example of a light emitting device applied to a light source module according to an embodiment.
8 is a view showing a cross-section of a light source module according to an embodiment applied to an air purifier.
9 and 10 are graphs of the illuminance distribution of the air cleaner to which the light source modules according to Examples and Comparative Examples are applied, respectively.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, the technical spirit of the present invention is not limited to some embodiments described, but may be implemented in various different forms, and within the scope of the technical spirit of the present invention, one or more of its components between embodiments may be selectively selected. It can be used by bonding and substitution.

In addition, terms (including technical and scientific terms) used in the embodiments of the present invention, unless clearly defined and specifically described, can be generally understood by those skilled in the art to which the present invention pertains. It can be interpreted as a meaning, and terms that are commonly used, such as predefined terms, may be interpreted by considering the contextual meaning of the related technology.

In addition, the terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention. In the present specification, a singular form may also include a plural form unless specifically stated in the phrase, and is combined as A, B, C when described as "at least one (or more than one) of A and B, C". It can contain one or more of all possible combinations.

In addition, in describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the term is not limited to the nature, order, or order of the component. And, when a component is described as being 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also to the component It may also include a case of 'connected', 'coupled' or 'connected' due to another component between the other components.

Further, when described as being formed or disposed in the "top (top) or bottom (bottom)" of each component, the top (top) or bottom (bottom) is one as well as when the two components are in direct contact with each other It also includes a case in which another component described above is formed or disposed between two components. In addition, when expressed as "up (up) or down (down)", it may include the meaning of the downward direction as well as the upward direction based on one component.

In addition, before describing the embodiments of the present invention, the horizontal direction may mean an x-axis direction illustrated in the drawing and a y-axis direction perpendicular to the x-axis direction, and the vertical direction may be a z-axis direction illustrated in the drawing. It may be a direction perpendicular to the x-axis and y-axis directions.

1 is an exploded perspective view of a light source module according to an embodiment, and FIG. 2 is a perspective view of a light source module according to an embodiment. 3 is a plan view of the light source module according to the embodiment, and FIG. 4 is a bottom view of the light source module according to the embodiment. 5 is a cross-sectional view taken along line A-A 'of the light source module of FIG. 3 according to an embodiment, and FIG. 6 is an enlarged view of area A1 of FIG. 5.

1 to 6, the light source module 1000 according to an embodiment includes a circuit board 520, a light emitting device 501 disposed on the circuit board, and the circuit board 520 and the light emitting device 501. It may include an optical lens 100 disposed on the.

The circuit board 520 may include a circuit pattern electrically connected to the light emitting device 501. The circuit board 520 may be a support member supporting the light source module 1000. The circuit board 520 may be a printed circuit board (PCB) including a circuit pattern (not shown). The circuit board 520 may include at least one of a resin-made PCB, a metal core PCB (MCPCB, Metal Core PCB), a ceramic substrate, and a flexible PCB (FPCB), but is not limited thereto. . The circuit board 520 may include a layer of a resist material protecting the circuit pattern on the surface or a layer of a reflective material for reflection. A metal layer for heat dissipation or a heat dissipation plate may be disposed under the circuit board 520. A reflective member (not shown) of a predetermined thickness is disposed on the lower circumference of the optical lens 100 among the upper surfaces of the circuit board 520 to prevent light leakage. An identification mark for distinguishing the polarity of the electrode may be disposed on the circuit board 520, but is not limited thereto. A plurality of via structures may be formed in the circuit board 520, and the via structures may be formed on one surface of the circuit board 520 on which the light emitting device 501 is disposed and on the other surface opposite to the one surface. The electrode pattern can be electrically connected. In addition, although not shown in the drawings, a protection element, a transistor, a voltage regulator and a resistor may be further disposed on the circuit board 520. The top view shape of the circuit board 520 may be a circular shape or a polygonal shape.

A plurality of light emitting elements 501 may be arranged on the circuit board 520. The plurality of light emitting elements 501 arranged on the circuit board 520 may be connected to at least one of a series, a series-parallel, a parallel, and a bottle-serial, but is not limited thereto.

The light emitting device 501 may be disposed along a circumferential direction set based on the center P0 of the circuit board 520. The light emitting device 501 may be arranged in a concentric circle shape with the center P0 of the circuit board 520 as the center of the circle. The light emitting elements 501 arranged on the circumference may be spaced apart from each other at the same distance. For example, when two light emitting elements 501 are disposed on the circuit board 520, a center P0 of the circuit board 520 and a central angle formed by the light emitting devices 501 may be 180 degrees. As another example, when six light emitting devices 501 are disposed on the circuit board 520, a center angle formed by the light emitting devices 501 adjacent to the center P0 of the circuit board 520 may be 60 degrees. .

The light emitting device 501 may emit light in an ultraviolet wavelength band. For example, the light emitting device can emit light of about 410 nm or less. It can emit ultraviolet rays in the UV-A, UV-B and UV-C region. One or a plurality of light emitting chips may be disposed in the light emitting device 501, but is not limited thereto. The light emitting chip 510 may include at least one of a group III-V compound semiconductor and a group II-VI compound semiconductor. The light emitting chip may include a light emitting structure in which compound semiconductor layers are stacked on a substrate and the substrate. The light emitting structure may include a first conductivity type semiconductor layer, an active layer, and a second conductivity type semiconductor layer. The light emitting chip may be disposed on the circuit board 520 by a flip chip method, a vertical chip structure, or a horizontal chip structure.

The optical lens 100 may be disposed on the circuit board 520 and the light emitting device 501. The optical lens 100 may be arranged spaced apart from contact with the light emitting element 501, may include a lower surface facing the upper surface of the circuit board 520, and a lower surface of the optical lens 100 May be a flat surface. The lower surface of the optical lens 100 may be parallel to the upper surface of the circuit board 520. The lower surface of the optical lens 100 may directly contact the circuit board 520. The optical lens 100 may be fixed to the circuit board 520 by a fixing part 180 formed on a lower surface, and may directly contact the upper surface of the circuit board 520.

The optical lens 100 may include a light-transmissive material. The optical lens 100 may include at least one of polycarbonate (PC), polymethyl methacrylate (PMMA), silicone or epoxy resin, or glass. The optical lens 100 may include a transparent material having a refractive index in the range of 1.4 to 1.7.

The optical lens 100 may include protrusions 110 and 120. The protrusions 110 and 120 may have a convexly protruding shape in the vertical direction. For example, the protrusions 110 and 120 may have a convex shape in a vertical direction from the top surface of the optical lens 100. Here, the upper surface of the optical lens 1000 may mean a surface opposite to the lower surface facing the upper surface of the circuit board 520 in the optical lens 1000.

The protrusions 110 and 120 may be disposed in an edge region of the optical lens 1000. For example, the protrusions 110 and 120 may be disposed on the light emitting element 501. The protrusions 110 and 120 may be formed along the circumference of the concentric circle shape from the center P0 of the circuit board 520. The protrusions 110 and 120 may have a ring shape when viewed in a plane, and may be disposed on the circuit board 520.

The protrusions 110 and 120 may include recesses. In detail, the protrusions 110 and 120 may include a first recess 150 concave in the upper direction from the lower surface of the protrusions 110 and 120. The first recess 150 may have a concave shape in the direction of the upper surface of the projections 110 and 120, for example, the upper surface of the optical lens 1000, from the lower surfaces of the projections 110 and 120. The first recess 150 may be disposed on the light emitting element 501. The first recess 150 may be formed in a region overlapping the light emitting device 501 on the lower surface of the optical lens 100.

The first recess 150 may be formed on a lower surface of the optical lens 100 along a circumferential direction set based on the center P0 of the circuit board 520. In detail, the first recess 150 may be formed along the circumference of the concentric circle shape from the center P0 of the circuit board 520 on the lower surfaces of the protrusions 110 and 120.

One first recess 150 may be provided on the lower surfaces of the protrusions 110 and 120. The first recess 150 is formed as a separate area when viewed in a plan view, and may be provided in the form of a circular ring having a predetermined width on the lower surfaces of the protrusions 110 and 120. The first recess 150 may have a closed loop shape having a predetermined width on the lower surfaces of the protrusions 110 and 120.

The first recess 150 may be spaced apart from being in contact with the light emitting element 501, and a horizontal cross-section may have a loop shape so that the light emitting element 501 can be inserted therein.

The light emitting elements 501 may be disposed at equal intervals along the circumference of the concentric circle shape from the center of the circuit board 520 within the first recess 150.

The width of the first recess 150 may change from the lower surface of the optical lens 100 toward the upper portion of the optical lens 100. For example, the horizontal width of the first recess 150 may gradually decrease from the bottom surface to the top. The first recess 150 may include one of a plane having a vertical cross section, a curved surface, and a mixture of a plane and a curved surface. For example, the first recess 150 may be formed in a horn shape or a spherical shape. In detail, the first recess 150 may have a concave horn shape toward the upper direction and a triangular cross section. In addition, the first recess may have a concave spherical shape toward the upper direction and a cross section may have a curved shape.

The first recess 150 may include a central region. In detail, the first recess 150 may include a central region including the vertex P1 of the first recess 150. The vertex P1 of the first recess 150 may be an inflection point of the first recess 150. That is, the central region of the first recess 150 may be an area including the vertex P1 and the inflection point, and may overlap the vertex P1 and the inflection point in a vertical direction. Between the apex P1 of the first recess 150 and the apex P4 of the protrusions 110 and 120 may have a first height h1 in a vertical direction. For example, the first height h1 may be a vertical gap between the vertices P1 located at the center of the first recess 150 and the vertices P4 of the protrusions 110 and 120. Here, the vertex P1 of the first recess 150 may be an inflection point of the first recess 150. The first height h1 may be about 10% to about 25% of the thickness h0 of the optical lens 100. When the first height h1 is less than about 10%, there is a problem that the rigidity of the optical lens 100 is weakened by the first recess 150. In addition, when the first height h1 exceeds about 25%, a hot spot phenomenon may occur due to an increase in the amount of light incident and emitted in the direction of the central axis of the first recess 150. The amount of light emitted in the lateral direction of the optical lens 100 may be lowered. For example, when the thickness h0 of the optical lens 100 is about 6 mm, the first height h1 may be about 1.5 mm or less. In detail, the first height h1 may be about 0.8 mm to about 1.2 mm. Accordingly, the optical lens 100 may prevent light from being emitted in an upper direction based on a vertical direction.

The first recess 150 may have a vertical normal perpendicular to the top surface of the circuit board 520 in the central region. In detail, the first recess 150 may have a vertical normal at the vertex P1. In this case, the vertical normal may be defined as a first central axis L1 as a central axis of the central region, and the first central axis L1 may be an apex P1 of the first recess 150 and the The protrusions 110 and 120 may overlap the vertex P4. The protrusions 110 and 120 may be symmetrical to each other in a different shape based on the first central axis L1.

The protrusions 110 and 120 of the optical lens 100 may include a first protrusion 110 and a second protrusion 120 divided by the first central axis L1. The first protrusion 110 and the second protrusion 120 may be integrally formed. The first protrusion 110 may be a protrusion located adjacent to the outside of the circuit board 520. The second protrusion 120 may be a protrusion located closer to the center P0 of the circuit board 520 than the first protrusion 110. In detail, the first protrusion 110 is a protrusion having a convex shape in the outward direction of the circuit board 520 with respect to the first central axis L1, and the second protrusion 120 is the first center It may be a protrusion having a convex shape in the direction of the center P0 of the circuit board 520 based on the axis L1.

Each of the first protrusion 110 and the second protrusion 120 may include an incident surface through which light is incident from the light emitting element 501. The incident surface is an inner surface of the first recess 150 having a concave shape, and may serve to provide light emitted from the light emitting element 501 into the optical lens 1000 as much as possible. The inner surface of the first recess 150 has a first inner surface 111 and the circuit board extending in the outer direction of the circuit board 520 based on the vertex P1 of the first recess 150 It may include a second inner surface 121 extending in the direction of the center (P0) of (520). That is, the first protrusion 110 may include a first inner surface 111, and the second protrusion 120 may include a second inner surface 121. The first inner surface 111 and the second inner surface 121 may be divided based on the first central axis L1.

The first inner surface 111 is a surface on which light emitted from the light emitting device 501 is incident, and may be disposed on the light emitting device 501. The first inner surface 111 may overlap the light emitting element 501 in a vertical direction. At this time, the optical axis L2 of the light emitting element 501 may overlap the first inner surface 111 in the vertical direction. The first inner surface 111 has a shape of at least one of a straight line and a curved line, and the first inner surface 111 and the optical lens (at the vertex P1 located at the center of the first recess 150) 100) may extend to the intersection point P2 of the lower surface.

The second inner surface 121 is a surface on which light emitted from the light emitting device 501 is incident, and may be disposed on the light emitting device 501. The second inner surface 121 may overlap the light emitting element 501 in a vertical direction. At this time, the optical axis L2 of the light emitting element 501 may not overlap with the second inner surface 121. The second inner surface 121 has a shape of at least one of a straight line and a curved line, and the second inner surface 121 and the optical lens (at the vertex P1 at the center of the first recess 150) 100) may extend to the intersection P3 of the lower surface.

In addition, each of the first protrusion 110 and the second protrusion 120 may include an emission surface through which light is emitted from the light emitting element 501. The emission surface is an upper surface of the projections 110 and 120 having a convex shape in the upper direction, and light incident into the optical lens 1000 may be refracted through the upper surfaces of the projections 110 and 120 to exit. . The upper surfaces of the protrusions 110 and 120 are the first upper surface 112 and the circuit board 520 extending in the outward direction of the circuit board 520 based on the vertex P4 of the protrusions 110 and 120. It may include a second upper surface 122 extending in the center (P0) direction of. That is, the first protrusion 110 may include a first upper surface 112, and the second protrusion 120 may include a second upper surface 122. The first upper surface 112 and the second upper surface 122 may be divided based on the first central axis L1.

The first upper surface 112 is a surface extending outward from the vertex P4 of the protrusions 110 and 120, and may be a surface through which light incident into the optical lens 1000 is emitted. The first upper surface 112 may be disposed on the light emitting element 501. The first upper surface 112 may overlap the light emitting device 501 in a vertical direction. At this time, the optical axis of the light emitting element 501 may overlap the first upper surface 112 in the vertical direction. The first upper surface 112 may have at least one of a straight line and a curved cross section. For example, the first upper surface 112 may be formed as a curved surface having a vertical cross-section.

The second upper surface 122 is a surface extending from the vertex P4 of the protrusions 110 and 120 in the direction of the center P0 of the circuit board 520, which is incident into the optical lens 1000. It may be a surface from which light is emitted. The second upper surface 122 may be disposed on the light emitting device 501. The second upper surface 122 may not overlap the light emitting device 501 in a vertical direction. The second upper surface 122 may have at least one of a straight line and a curved cross section. For example, the second upper surface 122 may be formed as a curved surface having a vertical cross-section. Light incident into the optical lens 100 may be refracted through the first upper surface 112 and the second upper surface 122 to be emitted to the outside.

The first inner surface 111 may have a first inclination angle θ1 with respect to the first central axis L1. In detail, when the first inner surface 111 is straight, the first inner surface 111 may have a first inclination angle θ1 with respect to the first central axis L1. In addition, when the first inner surface 111 includes a curve, the first inclination angle θ1 may be an inclination angle between the first central axis L1 and the virtual first line. Here, the virtual first line may mean the virtual line connecting the vertex P1 and the intersection P2 of the lower surface of the optical lens 100 and the first inner surface 111. The first inclination angle θ1 may be about 30 degrees to about 50 degrees. When the first inclination angle θ1 is less than about 30 degrees, the amount of light incident on the first inner surface 111 may be small, and light is concentrated in the upper region of the first upper surface 112 to The light emitted in the lateral direction of the light source module 1000 may not be uniform. In detail, the amount of light incident on the lower region of the first inner surface 111 decreases, so that the amount of light emitted to the lower region of the first upper surface 112 adjacent to the lower region of the first inner surface 111 is reduced. You can write down. In addition, when the inclination angle of the first inner surface 111 is less than about 30 degrees, it may be difficult to secure a space for disposing the light emitting device 501 under the first recess 150, and the light emitting device ( Light emitted from 501 may be incident on the lower surface of the optical lens 100 rather than on the incident surfaces 111 and 121. When the first inclination angle θ1 exceeds about 50 degrees, light is intensively incident on the lower region of the first inner surface 111 and the light emitted in the lateral direction of the light source module 1000 is not uniform. It may not. In detail, the amount of light incident on the lower region of the first inner surface 111 increases so that the amount of light emitted to the lower region of the first upper surface 112 adjacent to the lower region of the first inner surface 111 increases. It may increase, and accordingly, light emitted through the exit surface may not be uniform. That is, it is preferable that the first inclination angle θ1 satisfies the above-described range in order to uniformly emit light in the lateral direction of the light source module 1000, for example, the upper side and the lower side of the light source module 1000. Do. More preferably, the first inclination angle θ1 may be about 35 degrees to about 50 degrees. When the first inclination angle θ1 satisfies the above-described range, light may be uniformly emitted to the side lower region, the side center region, and the side upper region of the first upper surface 112, and the light source module 1000. It is possible to prevent the light is emitted in the upper direction of.

The second inner surface 121 may have a second inclination angle θ2 with respect to the first central axis L1. In detail, when the second inner surface 121 is straight, the second inner surface 121 may have a second inclination angle θ2 with respect to the first central axis L1. When the second inner surface 121 includes a curve, the second inclination angle θ2 may be an inclination angle between the first central axis L1 and the virtual second line. Here, the virtual second line may mean a virtual line connecting the vertex P1 and the lower surface of the optical lens 100 and the intersection P3 of the second inner surface 121. The second inclination angle θ2 may be about 30 degrees to about 50 degrees. When the second inclination angle (θ2) is less than about 30 degrees, the amount of light incident on the second inner surface 121 may be small, and light is concentrated in the upper region of the second upper surface 122 to concentrate the light source module Light emitted in the lateral direction of 1000 may not be uniform. In detail, the amount of light incident on the lower region of the second inner surface 121 decreases, so that the amount of light emitted to the lower region of the second upper surface 122 adjacent to the lower region of the second inner surface 121 is reduced. You can write down. In addition, when the inclination angle of the second inner surface 121 is less than about 30 degrees, it may be difficult to secure a space for disposing the light emitting element 501 under the first recess 150, which causes the light emission. Light emitted from the element 501 may be incident on the lower surface of the optical lens 100 rather than the second inner surface 121. When the second inclination angle θ2 exceeds about 50 degrees, light is intensively incident on the lower region of the second inner surface 121 and the light emitted in the lateral direction of the light source module 1000 is not uniform. It may not. In detail, the amount of light incident on the lower region of the second inner surface 121 increases so that the amount of light emitted to the lower region of the second upper surface 122 adjacent to the lower region of the second inner surface 121 increases. Since it may increase, the light emitted through the second upper surface 122 may not be uniform for each region. In addition, the second upper surface 122 is a convex surface toward the center of the optical lens 100 from the optical lens 100 having a circular ring shape, and the second inclination angle θ2 does not satisfy the above-described range In this case, light emitted from the second upper surface 122 may be re-incident or reflected to the surface of the adjacent second upper surface 122. That is, the second inclination angle θ2 may uniformly emit light in the lateral direction of the light source module 1000, and is described above to prevent light emitted from the light source module 1000 from being re-incident or reflected. It is desirable to satisfy the range. More preferably, the second inclination angle θ2 may be about 30 degrees to about 45 degrees. When the second inclination angle θ2 satisfies the above-described range, light can be uniformly emitted to the side lower region, the side center region, and the side upper region of the second upper surface 122, and the second upper surface 122 ) To prevent light from being re-incident or reflected. In addition, light emitted to the second upper surface 122 may be prevented from being emitted in an upper direction of the light source module 1000.

The light source module 1000 according to the embodiment may effectively emit light in an outer side direction of the circular light source module 1000. To this end, the first protrusion 110 and the second protrusion 120 may have different shapes based on the first central axis L1.

The first protrusion 110 may have a greater inclination angle than the second protrusion 120 with respect to the first central axis L1. In detail, the first inner surface 111 with respect to the first central axis L1 may have a larger inclination angle than the second inner surface 121. That is, within the above-described range, the first inclination angle θ1 may be greater than the second inclination angle θ2.

The length of the first inner surface 111 may be different from the length of the second inner surface 121. For example, the length of the vertical cross-section of the first inner surface 111 may be longer than the length of the vertical cross-section of the second inner surface 121. Here, the length of the vertical cross-section of the first inner surface 111 may be a length between the vertex P1 and the first intersection P2, and the length of the vertical cross-section of the second inner surface 121 is the vertex. It may be a length between (P1) and the second intersection (P3). Accordingly, the area of the first inner surface 111 may be larger than the area of the second inner surface 121, and the first inner surface 111 may have a larger amount than the second inner surface 121. Light may be incident. Therefore, different amounts of light may be incident on each of the first protrusion 110 and the second protrusion 120, and may be refracted and emitted at different angles within each protrusion.

In addition, the first protrusion 110 has a horizontal width (d1), the horizontal width (d1) means the horizontal width between the first inner surface 111 and the first upper surface 112 can do. The horizontal width d1 of the first protrusion 110 may increase toward the upper direction from the lower surface of the optical lens 100. In detail, the horizontal width d1 of the first protrusion 110 may increase to a vertex P1 of the first recess 150 from the lower surface of the optical lens 100 as a starting point.

The second protrusion 120 has a horizontal width (d2), the horizontal width (d2) may mean the horizontal width between the second inner surface 121 and the second upper surface (122). have. The horizontal width d2 of the second protrusion 120 may increase toward the upper direction from the lower surface of the optical lens 100. In detail, the horizontal width d2 of the second protrusion 120 may increase to a vertex P1 of the first recess 150 from the lower surface of the optical lens 100 as a starting point.

The horizontal width d1 of the first protrusion 110 based on the first central axis L1 may be smaller than the horizontal width d2 of the second protrusion 120. In detail, in the region from the lower surface of the optical lens 100 to the vertex P1, the horizontal width d1 of the first protrusion 110 is the horizontal width d2 of the second protrusion 120 It can be smaller. Here, the width in the horizontal direction may mean a width measured at the same height of the above-described area.

The curvature of the first protrusion 110 may be different from the curvature of the second upper surface 122. In detail, the curvature of the first upper surface 112 may be smaller than the curvature of the second upper surface 122. In addition, the area of the first upper surface 112 may be smaller than the area of the second upper surface 122. In detail, the area of the first upper surface 112 exposed to the surface when viewed from a plane may be larger than the area of the second upper surface 122. That is, as the first protrusion 110 and the second protrusion 120 have different inclination angles, horizontal widths, curvatures, areas, and the like, they refract and reflect the light incident on each lens part in various directions. Can be fired.

The light emitting device 501 may have a second central axis L2 defined as an optical axis of the light emitting device 501. The second central axis L2 does not overlap with the first central axis L1 in the vertical direction and may be spaced apart in the horizontal direction. The second central axis L2 of the light emitting device 501 may be closer to the outside of the circuit board 520 than the first central axis L1 of the first recess 150. In detail, when a plurality of the light emitting elements 501 are disposed on the circuit board 520, the second central axis L2 is on a circumference set based on the center P0 of the circuit board 520. Can be located. That is, the second central axis L2 may be located on a concentric circle with the center P0 of the circuit board 520 as the center of the circle. The diameter of the concentric circle on which the second central axis L2 is located based on the center P0 of the circuit board 520 is a concentric circle formed by the first central axis L1 of the first recess 150. It may be larger than the diameter. Accordingly, concentric circles formed by the second central axis L2 may be disposed in concentric circles formed by the first central axis L1.

The second central axis L2 may overlap with the first protrusion 110 and may not overlap with the second protrusion 120. In detail, the second central axis L2 overlaps the first inner surface 111 and the first upper surface 112 of the first protrusion 110 in a vertical direction and is within the second inside of the second protrusion 120. The side 121 and the second upper surface 122 may not overlap.

The second central axis L2 may be spaced apart from the first central axis L1 by a distance defined by a third distance d3 in the horizontal direction. The third distance d3 is a factor that can control the direction of light emitted from the optical lens 100, and a value may change according to the thickness h0 of the optical lens 100.

The third distance d3 may be about 2.5% to about 4.5% of the thickness h0 of the optical lens 100. When the third distance d3 is less than about 2.5% of the thickness h0 of the optical lens 100, a separation distance between the first central axis L1 and the second central axis L2 may be short. have. In this case, the amount of light entering and exiting the first protrusion 110 is lowered, and the amount of light entering and exiting the second protrusion 120 can be increased. Accordingly, the amount of light emitted in the outward direction of the light source module 1000 may be reduced. In addition, when the third distance d3 exceeds about 4.5% of the thickness h0 of the optical lens 100, the amount of light entering and exiting the first protrusion 110 increases to increase the light source module ( 1000) may increase the amount of light emitted in the outer surface direction. However, the emitted light may be concentrated in a specific direction without uniformly emitting in the direction of the lower side, the central side and the upper side. In addition, when the third distance d3 exceeds about 4.5%, light incident on the optical lens 100 is directed toward an upper surface of the optical lens 100, for example, an upper direction of the light source module 1000. Light can be emitted.

That is, the optical lens 100 according to the embodiment can minimize the light emitted in the upper direction of the optical lens 100, and can emit light evenly in the lateral direction. In detail, the light incident on the first protrusion 110 of the optical lens 100 is the first inclination angle (θ1), the first width (d1), the first central axis (L1) and the second central axis The third distance d3 between L2 and the like may uniformly exit the optical lens 100 in an outward direction. In addition, the light incident on the second projection 120 is the second inclination angle (θ2), the second width (d2), the first central axis (L1) and the second central axis (L2) between the second It can be emitted in the outward direction of the optical lens 100 by the three distance (d3), it is possible to minimize the light emitted to the lower region of the second upper surface 122. Accordingly, it is possible to prevent light emitted through the second upper surface 122 from being re-incident to the optical lens 100. In detail, the second upper surface 122 of the second protrusion 120 may have a circular ring shape adjacent to and connected to the center direction of the circuit board 520 as described above. That is, as the optical lens 100 has a circular shape, the light emitted through the second protrusion 120 re-enters the second upper surface 122 adjacent to or facing the emitted point or the second It may be reflected on the upper surface 122. However, the second protrusion 120 according to the embodiment controls the direction of the light emitted from the second protrusion 120 through the above-described second inclination angle, the second width (d2) and the third distance (d3), etc. It is possible to prevent re-entry and re-reflection to the second protrusion 120.

The optical lens 100 may include a connecting portion 160 extending to a central region of the optical lens 100. The connection part 160 may extend from the end of the second protrusion 120 toward the center P0 of the circuit board 520. The connection part 160 is parallel to an upper surface of the circuit board 520 and may be disposed on a central region of the circuit board 520. The connecting part 160 may not be overlapped with the light emitting element 501 in a vertical direction, and may be disposed in a central region of the optical lens 100 where the lens parts 110 and 120 are not located. The connection part 160 has a thickness of about 1 mm, and can protect a circuit pattern or the like exposed on the upper surface of the circuit board 520. That is, when viewed in a plan view, the upper surface of the circuit board 520 may not be exposed to the outside by the first protrusion 110, the second protrusion 120, and the connection 160. Alternatively, the connection part 160 may include an opening. Although not shown in the drawing, the opening may be a hole that opens the lower surface of the connecting portion 160 facing the upper surface of the circuit board 520 and the upper surface of the connecting portion 160 opposite to the lower surface. The connection part 160 includes at least one opening, and the opening is formed on an area in which a circuit pattern of the circuit board 520 is not formed to improve heat dissipation characteristics of the light source module 1000.

The optical lens 100 may include a protrusion 170 protruding in the horizontal direction around the outer circumference. The protruding portion 170 is configured to protrude from the outermost side of the optical lens 100, and may protrude more outward than the outer side of the circuit board 520. The protrusion 170 has a thickness of about 1mm and has an effect of being easily separated during injection molding of the optical lens 100 as it protrudes outward of the first protrusion 110, and also, the protrusion 170 As it has a form that protrudes from the outside of the circuit board 520, foreign matter may be prevented from entering the circuit board 520 and the first recess 150. For example, the protrusion 170 may directly contact the periphery of the upper edge of the circuit board 520 to prevent foreign matter from entering the first recess 150. As another example, the protrusion 170 may protrude from the outermost side of the optical lens 100 and bend in the lateral direction of the circuit board 520. Accordingly, the protrusion 170 is disposed surrounding the outer surface of the circuit board 520 to block the space between the first recess 150 and the circuit board 520.

The optical lens 100 may include a plurality of fixing parts 180 disposed below. The fixing part 180 may protrude from a lower surface of the optical lens 100 in a downward direction, for example, an upper surface of the circuit board 520. The fixing part 180 may be disposed on the lower surface of the connecting part 160 of the optical lens 100. That is, the fixing part 180 may have a shape protruding in the direction of the circuit board 520 on the lower surface of the connection part 160. The fixing part 180 may be fixed on the circuit board 520 to support the optical lens 100, and prevent the optical lens 100 from moving or separating on the circuit board 520. You can.

The fixing part 180 may contact the upper surface of the circuit board 520. The fixing part 180 may be inserted into and disposed in the groove 521 formed on the upper surface of the circuit board 520. The groove 521 may have a predetermined depth into which the fixing part 180 can be inserted. The groove 521 may correspond to the number of the fixing parts 180. The groove 521 may have a width corresponding to the fixing portion 180 to minimize the movement of the fixing portion 180 within the groove 521. Accordingly, the optical lens 100 may have a form detachable from the circuit board 520. An adhesive component such as silicone or epoxy may be applied between the fixing part 180 and the groove 521 to adhere the optical lens 100 to the circuit board 520.

7 is a side cross-sectional view showing a light emitting device of a light source module according to an embodiment.

Referring to FIG. 7, the light emitting device 501 includes a body 530 including a recess 537, a plurality of electrodes 551, 552, and 553 disposed on the recess 537, and the plurality of electrodes A light emitting chip 510 disposed on at least one of 551, 552, and 553 electrodes, and a transparent window 590 disposed on the recess 537 may be included.

The light emitting chip 510 may include an optional peak wavelength within a range from ultraviolet wavelengths to visible light wavelengths. For example, the light emitting chip 510 may emit ultraviolet wavelengths in a region of about 10 nm to 400 nm. In detail, the light emitting chip 510 may emit ultraviolet wavelengths in the UV-A, UV-B, and UV-C region.

The light emitting chip 510 may be formed of a compound semiconductor of a group II and VI element, or a compound semiconductor of a group III and V element. For example, a semiconductor light emitting device manufactured using a compound semiconductor of a series of AlInGaN, InGaN, AlGaN, GaN, GaAs, InGaP, AllnGaP, InP, InGaAs may be selectively included. The light emitting chip 510 may include an n-type semiconductor layer, a p-type semiconductor layer, and an active layer, and the active layer is InGaN / GaN, InGaN / AlGaN, InGaN / InGaN, GaN / AlGaN, InAlGaN / InAlGaN, AlGaAs / It may be implemented as a pair of GaAs, InGaAs / GaAs, InGaP / GaP, AlInGaP / InGaP, InP / GaAs.

The body 530 may include an insulating material, for example, a ceramic material. The ceramic material may include low temperature co-fired ceramic (LTCC) or high temperature co-fired ceramic (HTCC), which are simultaneously fired. The material of the body 530 may be, for example, AlN, and may include a metal nitride having a thermal conductivity of 140 W / mK or more.

The body 530 may include a stepped structure. In detail, the upper circumference of the body 530 may include a stepped structure 533. The stepped structure 533 may be disposed around an upper portion of the recess 537 in an area lower than an upper surface of the body 530. The depth of the stepped structure 533 is a depth from the upper surface of the body 530, and may be formed deeper than the thickness of the transparent window 590, but is not limited thereto.

The recess 537 is an area in which a part of the upper region of the body 530 is open, and may be formed at a predetermined depth from the upper surface of the body 530. For example, the bottom of the recess 537 may be formed to a depth deeper than the stepped structure 533 of the body 530. The position of the stepped structure 533 may be arranged in consideration of the height of the first connecting member connected to the light emitting chip 510 disposed on the bottom of the recess 537. Here, the direction in which the recess 537 is opened may be a direction in which light generated from the light emitting chip 510 is emitted.

The recess 537 may include a polygonal, circular, or elliptical top view shape. The recess 537 may have a chamfered edge, for example, a curved surface. Here, the recess 537 may be located inside the stepped structure 533 of the body 530.

The lower width of the recess 537 may be formed to be the same width as the upper width of the recess 537 or the upper width may be formed wider. In addition, the side wall 531 of the recess 537 may be formed perpendicular or inclined to the extension line of the lower surface of the recess 537.

A sub recess (not shown) may be disposed in the recess 537. The lower surface of the sub-recess 537 may be disposed below the lower surface of the recess 537 in a vertical direction. A protection element (not shown) may be further disposed in the sub recess. The vertical height of the sub recess 537 may correspond to or be greater than the vertical thickness of the protection element. That is, the upper surface of the protection element is disposed so as not to protrude above the lower surface of the recess, thereby preventing the light output from being deteriorated by the protection element and preventing the directivity angle from being distorted.

A plurality of electrodes 551, 552, and 553 are disposed in the recess 537, and the plurality of electrodes 551, 552, and 553 may selectively supply power to the light emitting chip 510. The plurality of electrodes 551, 552, and 553 may include metal. For example, the electrodes 551, 552, and 553 are among platinum (Pt), titanium (Ti), copper (Cu), nickel (Ni), gold (Au), tantalum (Ta), and aluminum (Al). It may include at least one. At least one of the plurality of electrodes 551, 552, and 553 may be formed as a single layer or multiple layers. For example, when the electrodes 551, 552, and 553 are formed in a multi-layer, gold (Au) having good bonding characteristics may be disposed on the uppermost layer, and titanium (which has good adhesion to the body 530) on the lowermost layer ( Ti), chromium (Cr), and tantalum (Ta) may be disposed. In addition, platinum (Pt), nickel (Ni), copper (Cu), or the like may be disposed in the intermediate layer between the top and bottom layers.

The electrodes 551, 552, and 553 include a first electrode 551 on which the light emitting chip 510 is disposed, a second electrode 552 and a third electrode 553 spaced apart from the first electrode 551, A fourth electrode (not shown) disposed in the sub recess may be included. The first electrode 551 is disposed at the bottom center of the recess 537 and the second electrode 552 and the third electrode 553 may be disposed on both sides of the first electrode 551. . In addition, either one of the first electrode 551 and the second electrode 552 may be removed, but is not limited thereto. The light emitting chip 510 may be disposed on a plurality of electrodes of the first to third electrodes 553, but is not limited thereto.

The first electrode 551 and the fourth electrode may be supplied with power having a first polarity. In addition, the second electrode 552 and the third electrode 553 may be supplied with power of a second polarity. The polarity of the electrode may vary depending on an electrode pattern or a connection method with each device, but is not limited thereto.

The light emitting chip 510 may be disposed in the recess 537. The light emitting chip 510 may be bonded to the first electrode 551 with a conductive adhesive, and may be connected to the second electrode 552 with a first connecting member including a first wire or the like. The light emitting chip 510 may be electrically connected to the first electrode and the second electrode 552 or the third electrode 553. The connection method of the light emitting chip 510 may be selectively connected using a wire bonding, die bonding, or flip bonding method, and the chip type and the electrode position of the chip may be changed according to the bonding method. The protection element may be bonded to the fourth electrode and may be connected to the third electrode 553 by a second connection member including wires. However, embodiments are not limited thereto, and the protection element may be removed from the recess 537 and disposed on the circuit board 502 described above.

A plurality of pads 571 and 572 may be disposed on the lower surface of the body 530. For example, a first pad 571 and a second pad 572 that are spaced apart from each other may be disposed on the lower surface of the body 530. At least one of the first and second pads 571 and 572 may be disposed in a plurality to disperse the current path.

A connection pattern 555 may be disposed in the body 530. The connection pattern 555 may provide an electrical connection path between the recess 537 and the bottom surface of the body 530. For example, a part of the first electrode 551 may extend into the body 530 and be connected to the connection pattern 555, and may be connected to another electrode through the connection pattern 555. The connection pattern 555 may electrically connect the first electrode 551, the fourth electrode, and the first pad 571, and the second electrode 552, the third electrode 553 And electrically connecting the second pad 572.

A transparent window 590 may be disposed on the recess 537. The transparent window 590 may include a glass material, for example, quartz glass. Accordingly, the transparent window 590 may be defined as a material that can transmit light emitted from the light emitting chip 510 without damage, such as destruction of bonds between molecules, by ultraviolet wavelengths.

The outer circumference of the transparent window 590 may be coupled to the stepped structure 533 of the body 530. An adhesive layer 580 is disposed between the transparent window 590 and the stepped structure 533 of the body 530, and the adhesive layer 580 includes a resin material such as silicone or epoxy. The transparent window 590 may be formed to have a width wider than the bottom width of the recess 537. The lower surface area of the transparent window 590 may be formed with a larger area than the bottom area of the recess 537. Accordingly, the transparent window 590 can be easily coupled to the stepped structure 533 of the body 530.

The transparent window 590 may be spaced apart from the light emitting chip 510. As the transparent window 590 is spaced from the light emitting chip 510, it can be prevented from being expanded by heat generated by the light emitting chip 510. The space under the transparent window 590 may be an empty space or may be filled with a non-metal or metal chemical element, but is not limited thereto.

A lens may be coupled on the transparent window 590. For example, a separate lens may be combined on the transparent window 590 to adjust the directivity angle.

A molding member may be further disposed on the side surface of the body 530. That is, a molding member may be further disposed on the side surface of the light emitting element 501. Accordingly, reliability and moisture-proofing power of the light emitting device 501 may be improved.

8 is a view showing a cross-section of a light source module according to an embodiment disposed in an air cleaner.

Referring to FIG. 8, the air cleaner 2000 includes a housing 2100 including a suction part 2110 on an outer circumferential surface, a discharge part 2130 above the housing, and a filter member 2200 inside the housing 2100 and A blowing member 2150 may be included, and the light source module 1000 may be disposed inside the housing 2100.

The housing 2100 has a cylindrical shape with a space formed therein, and may include a resin such as metal or plastic. The housing 2100 may include a suction part 2110 disposed on an outer circumferential surface. The suction part 2110 may include a plurality of suction ports to allow air to move from the outside into the housing 2100. In one example, the suction port may be formed by penetrating in the inner direction from the outside of the housing 2100.

The suction part 2110 may suck air from all directions of an outer surface based on the housing 2100. In detail, the suction part 2110 may be evenly disposed in a circumferential direction along the outer circumferential surface of the housing 2100. Accordingly, the air cleaner 2000 can inhale air in the 360-degree direction of the housing 2100 through the suction part 2110 and maximize the suction area.

A blowing member 2150 may be disposed inside the housing 2100. The blowing member 2150 may be positioned above the suction part 2110 based on a vertical direction. The air blowing member 2150 generates air flow inside the air cleaner 2000, for example, inside the housing 2100, and arranges air introduced through the suction unit 2110 to the upper portion of the housing 2100. It can be guided to the discharge unit 2130. The discharge part 2130 may include a plurality of discharge ports to discharge air sucked into the suction part 2110.

The light source module 1000 described above may be disposed inside the housing 2100. The light source module 1000 may be disposed in a central region inside the housing 2100. The inner surface of the housing 2100 may have a concentric circle shape, and the light source module 1000 may be disposed to overlap the center of the concentric circle.

A filter member 2200 may be disposed inside the housing 2100. The filter member 2200 may filter external air sucked from the suction part 2110. The filter member 2200 may correspond to the shape of the housing 2100. The filter member 2200 may have a cylindrical shape to purify the air sucked from the suction part 2110 in a direction of 360 degrees.

The filter member 2200 may include the plurality of filter parts. For example, the filter member 2200 may include a first filter unit 2210 and a second filter unit 2230. Each of the first filter unit 2210 and the second filter unit 2230 may have a hollow cylindrical shape.

The first filter part 2210 is a filter part disposed on the outermost side of the filter member 2200 and may be a filter part closest to the suction part 2110. The second filter unit 2230 is a filter unit disposed inside the filter member 2200 and may be a filter unit that is disposed closest to the light source module 1000. That is, the diameter of the first filter unit 2210 based on the center of the air cleaner 2000 is larger than the diameter of the second filter unit 2230, and the second filter unit 2230 is the first filter unit It may be arranged to be inserted inside the (2210).

The first filter unit 2210 may filter particles such as dust, yellow dust, and ultra-fine dust in the air, and pre-filters, hepa filters, etc., which can filter microorganisms such as viruses. It may include.

The second filter unit 2230 may be a photocatalyst filter for antibacterial and deodorizing. In detail, the second filter unit 2230 may be a photocatalytic filter in which a photocatalytic material is disposed on activated carbon or a porous member. The second filter unit 2230 is a photocatalytic material titanium dioxide (TiO ₂ ), zinc oxide (ZnO), cadmium sulfide (CdS), tungsten oxide (WO ₃ ), vanadium oxide (V ₂ O ₃ ), zirconium oxide ( ZrO ₂ ), but is not limited thereto, and may include various photocatalytic materials capable of decomposing harmful gases by reacting with light.

The photocatalyst filter can decompose harmful substances by incident light. In detail, when light having a wavelength equal to or higher than an energy bandgap is incident on the photocatalytic material of the photocatalyst filter, electrons on the surface of the photocatalytic material are introduced into a conduction band in a valence band. The furnace transition occurs, which causes holes in the valence band. In this case, the hole (diffusion) may be diffused to the surface of the photocatalytic material to react with moisture or OH- to generate OH-radical, and the electron reacts with oxygen (O ₂ ) to O ₂ -radical. To generate OH-radicals. That is, the generated holes (holes) and electrons (electrons) can be adsorbed or suspended in the photocatalytic material, reducing and oxidizing substances, and decomposing harmful substances into substances harmless to the human body such as H ₂ O and CO ₂ to air Can cleanse.

For the above-described effect, the light source module 1000 is disposed inside the housing 2100 to irradiate light to the filter member 2200. In detail, the light source module 1000 may be disposed in a lower region inside the housing 2100 so that an upper surface of the light source module 1000 faces an upper portion of the housing 2100. However, embodiments are not limited thereto, and the light source module 1000 may be disposed in an upper region inside the housing 2100 so that an upper surface of the light source module 1000 may be arranged to face a lower portion of the housing 2100. have. In this case, the light source module 1000 is disposed between the bottom surface of the housing 2100 and the blowing member 2150 to irradiate light to the filter member 2200. In detail, the light source module 1000 may be disposed between the bottom surface of the housing 2100 and the blowing member 2150 to prevent the emitted light from being lost by the blowing member 2150.

The light source module 1000 may be uniformly irradiated with light on the surface of the filter member 2200 having a predetermined interval and spaced apart from the filter member 2200 and having a hollow cylindrical shape. The light source module 1000 may uniformly irradiate light to the inner surface of the second filter unit 2230 facing the light source module 1000. The light source module 1000 may emit light emitted from the light emitting device 501 by the optical lens 100 in the surface direction of the second filter unit 2230.

That is, the light source module 1000 according to the embodiment is the above-described optical lens 100 to irradiate uniform light on the surface of the cylindrical filter member 2200, for example, the second filter unit 2230 including a photocatalyst filter ). That is, the light source module 1000 can emit light in a 360-degree direction and irradiate light on the surface of the cylindrical second filter unit 2230, thereby effectively decomposing harmful substances.

Hereinafter, the operation and effects of the present invention will be described in more detail through Examples and Comparative Examples.

Example

A filter member including a photocatalyst filter was disposed inside the housing of the air purifier, and the photocatalyst filter was disposed inside the filter member. A light source module including the above-mentioned six light emitting elements and an optical lens on the light emitting element was disposed on the inner surface of the housing, and the horizontal spacing between the light source module and the photocatalyst filter was 115 mm apart.

Subsequently, the intensity value of the surface of the photocatalyst filter and the intensity value of the upper part of the housing were measured using a Lighttools ^TM program.

Comparative example

A light source module having the same air purifier structure as the embodiment and including an optical lens different from the embodiment was disposed on a lower surface inside the housing. The light source module according to the comparative example includes six light-emitting elements, and includes a 1mm-thick hemispherical optical lens without separate optical design on the light-emitting elements.

The light source module according to the comparative example was placed at a distance of 115 mm from the photocatalyst filter in a horizontal direction, and the illuminance value of the surface of the photocatalyst filter and the illuminance value of the upper part of the housing were measured using the same program as in the example.

Example Comparative example Filter inner side Housing upper part Filter inner side Housing upper part Max Irradiance
(mW / cm ² ) 14.6 0.37 7.2 4.7 Min Irradiance
(mW / cm ²⁾ 0.04 0 1.7 3 Average
(mW / cm ²⁾ 5.2 0.03 4.3 3.8

Table 1 is a table showing the surface (side) of the photocatalyst filter facing the light source module and the illuminance value incident on the upper end of the housing, and FIGS. 9 and 10 are respectively incident on the surface (side) and the top of the housing of the photocatalyst filter The illuminance value is expressed as an image. In FIGS. 9 and 10, the closer to red, the more light may be incident on the surface, and the closer to blue, the smaller the light incident on the surface.

Referring to Table 1 and FIG. 9A, the light source module 1000 according to the embodiment may effectively emit light in a lateral direction. In detail, the light source module 1000 can effectively emit light by the optical lens 100 to the inner surface of the photocatalyst filter. On the other hand, referring to Table 1 and (A) of FIG. 10, the light source module according to the comparative example may emit light in the lateral direction as the light source module 1000 of the embodiment, but the surface of the photocatalyst filter in comparison with the embodiment It can be seen that the maximum illuminance value measured at is about 50%, and the average value is about 90%.

In addition, the light source module 1000 according to the embodiment may prevent light from being emitted in the upper direction of the housing 2100. In detail, referring to Table 1 and FIG. 9 (B), the light source module 1000 according to the embodiment has an average illuminance value measured at the upper end of the housing 2100 of about 0.03 mW / cm ² . It can be seen that it is rarely emitted. On the other hand, referring to Table 1 and FIG. 10 (B), the average illuminance value measured at the upper part of the housing is about 3.8 mW /, as the light source module according to the comparative example does not include the optical lens 100 as in the embodiment. It can be seen that cm ² is about 126 times that of the embodiment, and it can be seen that light is emitted in the upper direction of the housing 2100.

Accordingly, the air cleaner according to the comparative example has a problem in that light emitted from the light source module 1000 is emitted toward the upper portion of the housing 2100 and is incident to a user using the air cleaner. That is, there is a problem that the user is exposed to ultraviolet rays.

On the other hand, the light source module 1000 according to the embodiment can effectively guide the light emitted from the light emitting element 501 toward the surface of the filter member 2200. That is, the light emitted from the light source module 1000 can be uniformly incident on the surface of the filter member 2200 having a cylindrical shape, thereby effectively decomposing harmful substances through a photocatalytic effect. In addition, light from the light source module 1000 may be prevented from being emitted to the outside through the upper direction of the housing 2100, for example, the discharge part 2130, so that a user is prevented from being exposed to ultraviolet rays.

That is, the light source module 1000 according to the embodiment may include a first protrusion 110 and a second protrusion 120 having different shapes from each other based on the first central axis L1 of the optical lens 100. have. Accordingly, the direction of light emitted from each lens unit can be controlled, and light emitted from the light source module 1000 can be prevented from being re-entered or reflected by the optical lens 100 to change the direction of light. . Accordingly, it is possible to have improved light efficiency and uniformly irradiate light to the surface of the second filter unit 2230 (photocatalyst filter) having a cylindrical shape provided inside the air cleaner 2000.

Features, structures, effects, etc. described in the above embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, features, structures, effects, and the like exemplified in each embodiment may be combined or modified for other embodiments by a person having ordinary knowledge in the field to which the embodiments belong. Therefore, the contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

In addition, although the embodiments have been mainly described above, these are merely examples and do not limit the present invention, and those skilled in the art to which the present invention pertains are exemplified above without departing from the essential characteristics of the present embodiment. It will be appreciated that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be implemented by modification. And differences related to these modifications and applications should be construed as being included in the scope of the invention defined in the appended claims.

Claims (11)

Circuit board;
A plurality of light emitting elements disposed on the circuit board; And
An optical lens disposed on the plurality of light emitting elements and including a projection,
The protrusion is formed along the circumference of the concentric circle shape from the center of the circuit board,
The protrusion is concave upward from the lower surface, and includes a first recess formed along a circumference of a concentric shape from the center of the circuit board,
The plurality of light emitting elements are spaced apart from each other and disposed in the first recess,
The protrusion has a vertical normal perpendicular to an upper surface of the circuit board in the central region of the first recess, wherein the vertical normal is a light source module closer to the center of the circuit board than the optical axis of the light emitting device based on the horizontal direction. . According to claim 1,
The protrusion includes a first protrusion adjacent to the outside of the circuit board based on the vertical normal and a second protrusion adjacent to the center of the circuit board than the first protrusion.
The first and second protrusions are light source modules having different shapes from each other. According to claim 2,
The first recess includes a first inner surface extending in an outer direction of the circuit board based on the vertical normal and a second inner surface extending in a center direction of the circuit board,
A light source module having different inclination angles of the first and second inner surfaces with respect to the vertical normal. According to claim 2,
The horizontal width of the first projection is smaller than the horizontal width of the second projection. According to claim 2,
The top surface of the projection has a curvature, and the curvature of the first projection is less than the curvature of the second projection. According to claim 1,
One of the first recesses is disposed on the lower surface of the protrusion,
The first recess is a light source module having a ring shape based on the center of the circuit board when viewed in a plan view. According to claim 1,
The light emitting element is a light source module disposed at equal intervals along a circumference of a concentric circle shape from the center of the circuit board in the first recess. According to claim 1,
The optical lens is a light source module including a connecting portion extending from the protrusion in the center direction of the circuit board. The method of claim 8,
The connection portion includes a fixing portion protruding from the lower surface of the connection portion in the upper surface direction of the circuit board,
The circuit board includes a groove corresponding to the fixing portion,
The fixing unit is a light source module disposed in the groove of the circuit board. A housing having a cylindrical shape and including a suction part on an outer circumferential surface;
A discharge portion located on the upper portion of the housing;
A light source module disposed inside the housing;
A filter member having a cylindrical shape in the housing and disposed between the suction part and the light source module; And
It is disposed inside the housing and includes a blowing member for flowing air passing through the filter member to the discharge unit,
The light source module is any one of the light source modules of claims 1 to 9,
The filter member includes a first filter unit and a second filter unit disposed inside the first filter unit and facing the light source module,
The second filter unit includes a photocatalyst filter,
The light source module is an air purifier that irradiates light to the second filter unit. The method of claim 10,
The light source module is an air purifier disposed on a lower surface inside the housing.

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