Light-emitting module and lens

Abstract

The present invention relates to a display device, a backlight unit, a light-emitting module, and a lens. A light-emitting module according to an embodiment of the present invention may include a light-emitting element; and a lens disposed above the light-emitting element and configured to disperse light emitted from the light-emitting element. The lens includes a light-incident portion into which light emitted from the light-emitting element is incident and a light-emitting portion from which the incident light is emitted. The planar shapes of the light-incident portion and the light-emitting portion each have a major axis and a minor axis, and are configured such that the major axis of the light-incident portion and the major axis of the light-emitting portion are perpendicular to each other. The lower surface of the lens includes an inclined surface that gradually inclines downward with respect to the horizontal plane toward the outside. According to the present invention, the light distribution emitted from the light-emitting module may have a shape approximating a rectangular shape, and thus may have an effect of emitting uniform light to the outside by combining with the light distribution emitted from an adjacent light-emitting module.

Description

[0001] This application is a divisional application of the patent application with the application date of March 8, 2019, the application number of 201980000919.1, and the title of "Light Emitting Module and Lens". Technical Field

[0002] The present invention relates to a light emitting module and a lens, and more particularly to a light emitting module and a lens capable of specifying a light emission distribution emitted to the outside. Background Art

[0003] A light emitting chip is an inorganic semiconductor element that emits light generated by recombination of electrons and holes. Recently, light emitting diodes have been widely used in various fields, such as display devices, vehicle lamps, general lighting, etc. Light emitting diodes have the advantages of a longer lifespan, lower power consumption compared to existing light sources, and a faster response speed, and due to these advantages, are rapidly replacing existing light sources.

[0004] When using such light emitting diodes in a display device or general lighting, several to dozens of light emitting diodes can be used. When using multiple light emitting diodes as described above, it is important to uniformly achieve light emission on the light emitting surface of the display device. Otherwise, the light emitted from each light emitting diode will interfere, resulting in the occurrence of shadows or partial hot spots. Summary of the Invention

[0005] Technical Problem

[0006] The problem to be solved by the present invention is to provide a light emitting module and a lens in which, when using multiple light emitting diodes, the light emitted from each light emitting diode can be uniformly emitted on the light emitting surface of the display device.

[0007] Technical Solution

[0008] A light emitting module according to an embodiment of the present invention may include a light emitting element; and a lens disposed above the light emitting element and dispersing the light emitted from the light emitting element. The lens includes a light incident portion where the light emitted from the light emitting element is incident and a light emitting portion where the incident light is emitted. The planar shapes of the light incident portion and the light emitting portion each have a major axis and a minor axis, and the major axis of the light incident portion and the major axis of the light emitting portion are arranged to be perpendicular to each other. The lower surface of the lens includes an inclined surface that gradually inclines downward with respect to the horizontal plane toward the outside.

[0009] The lens may have a protruding surface that protrudes from the lower surface of the lens with a predetermined curvature.

[0010] The inclined surface may be disposed outside the protruding surface.

[0011] The light incident portion is formed by being recessed from the protruding surface of the lens toward the upper portion, and the inner surface formed by the recess may include a vertical incident surface extending from the protruding surface of the lens and an inclined incident surface extending from the vertical incident surface.

[0012] The inclined surface may gradually incline downward with respect to the horizontal plane toward the outside in the longitudinal axis direction of the light emitting portion of the lens.

[0013] The boundary between the inclined surface and the lower surface of the lens is a straight line.

[0014] The light incident portion is formed by being recessed from the lower surface of the lens toward the upper portion, and the inner surface of the light incident portion is an incident surface on which light emitted from the light emitting element is incident. The incident surface includes one or more protruding incident surfaces protruding from the inclined surface of the incident surface toward the inside of the recessed light incident portion.

[0015] One or more of the protruding incident surfaces may be arranged on the inclined surface in the longitudinal axis direction of the light incident portion.

[0016] One or more protruding incident surfaces respectively arranged on the inclined surface of the light incident portion are arranged at positions facing each other in the horizontal direction.

[0017] The one or more protruding incident surfaces are a plurality of protruding incident surfaces, and the plurality of protruding incident surfaces may be arranged on the inclined surface formed relatively wider in the longitudinal axis direction and the short axis direction of the light incident portion.

[0018] A plurality of protruding incident surfaces arranged on the inclined surface form three protruding incident surfaces on one surface, and one of the three protruding incident surfaces may be formed larger than the other protruding incident surfaces.

[0019] In order to support the lens, the lens may further include a plurality of legs coupled to the lower surface of the lens.

[0020] On the lower portion of any one or more of the plurality of legs, a leg protruding portion protruding toward the lower portion may be formed from the leg.

[0021] The width of the leg protruding portion may be smaller than the width of the leg.

[0022] The lens may further include a flange connecting the light emitting portion and the lower surface of the lens.

[0023] The flange may have a greater thickness on the longitudinal axis of the light emitting portion than on the short axis of the light emitting portion.

[0024] In addition, a lens according to an embodiment of the present invention may include: a light incident portion having a lower portion formed in a concave shape and receiving light emitted from a light emitting element; and a light emitting portion emitting the light incident through the light incident portion to the outside, wherein the planar shapes of the light incident portion and the light emitting portion each have a major axis and a minor axis, the major axis of the light incident portion and the major axis of the light emitting portion are arranged perpendicular to each other, and an inclined surface gradually inclined downward with respect to the horizontal plane toward the outside is included on the lower surface of the lens.

[0025] It may further include a protruding surface protruding from the lower surface in a manner having a predetermined curvature.

[0026] The protruding surface may be arranged to surround the light incident portion.

[0027] The inclined surface may be arranged outside the protruding surface.

[0028] The inclined surface may gradually incline downward with respect to the horizontal plane toward the outside along the major axis direction of the light emitting portion.

[0029] The inner surface of the light incident portion is an incident surface on which the light emitted from the light emitting element is incident, wherein the light incident portion includes the incident surface and one or more protruding incident surfaces protruding from the inclined surface of the incident surface toward the inside of the concave light incident portion.

[0030] One or more of the protruding incident surfaces may be respectively arranged in the major axis direction of the light incident portion.

[0031] In addition, a light emitting module according to an embodiment of the present invention includes a light emitting element; and a lens arranged above the light emitting element and dispersing the light emitted from the light emitting element, the lens including a light incident portion on which the light emitted from the light emitting element is incident and a light emitting portion emitting the incident light, the planar shapes of the light incident portion and the light emitting portion each having a major axis and a minor axis, and the major axis of the light incident portion and the major axis of the light emitting portion being configured to be perpendicular to each other, the light incident portion being formed to be recessed from the lower surface of the lens toward the upper portion, the inner surface of the light incident portion being an incident surface on which the light emitted from the light emitting element is incident, and the incident surface may include one or more protruding incident surfaces protruding from the inclined surface of the incident surface toward the inside of the concave light incident portion.

[0032] One or more of the protruding incident surfaces are respectively arranged on the surfaces formed relatively wider in the major axis direction and the minor axis direction of the light incident portion, and a plurality of incident surfaces arranged on the inclined surface may be formed.

[0033] The lens may further include: a flange arranged between the light emitting surface and the lower surface of the lens; and one or more flange protruding portions, a part of which protrudes from the flange toward the outside of the lens.

[0034] A flange boundary part with a curve may be formed between the flange and the light emitting surface.

[0035] In addition, a backlight unit according to an embodiment of the present invention includes: a substrate; a plurality of light emitting elements disposed on the substrate; and a plurality of lenses respectively disposed above the plurality of light emitting elements to disperse light emitted from the light emitting elements. The plurality of lenses respectively include a light incident part where light emitted from the light emitting elements is incident and a light emitting part where the incident light is emitted. The planar shapes of the light incident part and the light emitting part respectively have a major axis and a minor axis, and the major axes of the light incident part and the light emitting part are arranged perpendicular to each other. The lower surface of the lens includes an inclined surface that gradually inclines downward relative to the horizontal plane toward the outside.

[0036] The substrate has a predetermined length, and the plurality of lenses may be arranged such that the major axis of the light emitting part is perpendicular to the length direction of the substrate.

[0037] It may further include a reflective sheet that reflects a part of the light emitted through the lens upward, and the reflective sheet may be fixed by the lens.

[0038] The reflective sheet may be fixed in contact with the inclined surface of the lens.

[0039] In addition, a backlight unit according to an embodiment of the present invention includes: a substrate; a plurality of light emitting elements disposed on the substrate; and a plurality of lenses respectively disposed above the plurality of light emitting elements to disperse light emitted from the light emitting elements. The plurality of lenses respectively include a light incident part where light emitted from the light emitting elements is incident and a light emitting part where the incident light is emitted. The planar shapes of the light incident part and the light emitting part respectively have a major axis and a minor axis, and the major axes of the light incident part and the light emitting part are arranged perpendicular to each other. The light incident part is formed to be recessed upward from the lower surface of the lens, and the inner surface of the light incident part is an incident surface where light emitted from the light emitting element is incident. The incident surface may include one or more protruding incident surfaces that protrude from the inclined surface of the incident surface toward the inside of the recessed light incident part.

[0040] In order to support the lens, the plurality of lenses may further include a plurality of legs coupled to the lower surface of the lens, and leg protrusions protruding downward from the legs may be formed on any one or more of the plurality of legs.

[0041] The substrate may be formed with one or more substrate holes into which the leg protrusions formed on any one of the plurality of legs are inserted.

[0042] One or more of the protruding incident surfaces are respectively arranged on the inclined surfaces formed relatively wider in the major axis direction and the minor axis direction of the light incident portion, and a plurality of protruding incident surfaces arranged on the inclined surfaces can be formed.

[0043] The lens may further include: a flange disposed between the light emitting surface and the lower surface of the lens; and one or more flange protrusions, a part of which protrudes from the flange toward the outside of the lens.

[0044] A curved flange boundary portion may be formed between the flange and the light emitting surface.

[0045] In addition, a display device according to an embodiment of the present invention includes: a substrate; a plurality of light emitting elements disposed on the substrate; a plurality of lenses respectively disposed above the plurality of light emitting elements to disperse light emitted from the light emitting elements, the plurality of lenses respectively including a light incident portion for light emitted from the light emitting elements to enter and a light emitting portion for emitting the incident light, the planar shapes of the light incident portion and the light emitting portion respectively having a major axis and a minor axis, the major axis of the light incident portion and the major axis of the light emitting portion being arranged perpendicular to each other, and the lower surface of the display device may include one or more backlight modules including inclined surfaces that gradually incline downward relative to the horizontal plane toward the outside.

[0046] The substrate may have a predetermined length, and the plurality of lenses are configured such that the major axis of the light emitting portion is perpendicular to the length direction of the substrate.

[0047] It may further include a reflective sheet that reflects a part of the light emitted through the lens upward, and the reflective sheet may be fixed by the lens.

[0048] The reflective sheet may be fixed in contact with the inclined surface of the lens.

[0049] In addition, a backlight unit according to an embodiment of the present invention includes: a substrate; a plurality of light emitting elements disposed on the substrate; and a plurality of lenses respectively disposed above the plurality of light emitting elements to disperse light emitted from the light emitting elements, the plurality of lenses respectively including a light incident portion for light emitted from the light emitting elements to enter and a light emitting portion for emitting the incident light, the planar shapes of the light incident portion and the light emitting portion respectively having a major axis and a minor axis, and the major axis of the light incident portion and the major axis of the light emitting portion being arranged perpendicular to each other, the light incident portion is formed to be recessed from the lower surface of the lens toward the upper direction, the inner surface of the light incident portion is an incident surface for light emitted from the light emitting elements to enter, and the incident surface may include one or more protruding incident surfaces that protrude from the inclined surface of the incident surface toward the inside of the recessed light incident portion.

[0050] The plurality of lenses may further include a plurality of legs formed on the lower surface of the lens to support the lens, and a leg protrusion protruding downward from the leg is formed on the lower part of any one or more of the plurality of legs.

[0051] The substrate may be formed with one or more substrate holes into which the leg protrusions formed on any one of the plurality of legs are inserted.

[0052] One or more of the inclined surfaces that are relatively wider in the major axis direction and the minor axis direction of the light incident portion are respectively arranged on the protruding incident surface, and a plurality of protruding incident surfaces arranged on the inclined surface may be formed.

[0053] The lens may further include: a flange disposed between the light emitting surface and the lower surface of the lens; and one or more flange protrusions, a part of which protrudes from the flange toward the outside of the lens.

[0054] A curved flange boundary portion may be formed between the flange and the light emitting surface.

[0055] Advantages of the Invention

[0056] According to the present invention, the light distribution emitted from the light emitting module may have a shape similar to a rectangular shape, so that there is an effect that uniform light can be emitted to the outside by combining with the light distribution emitted from adjacent light emitting modules.

[0057] In addition, the outer lower surface of the light emitting module is formed as an inclined surface, so that the reflecting sheet disposed below the lens can be fixed by using the inclined surface, and thus there is an effect of shortening the production process without using a separate bonding portion for fixing the reflecting sheet.

[0058] In addition, since the outer lower surface of the lens is formed as an inclined surface, the light emitted to the side surface of the light emitting element cannot be emitted from the light emitting portion or the flange of the lens to the outside and is reflected, and the reflected light is reflected again on the inclined surface to be emitted to the light emitting portion or the flange, so that there is an effect that the light emitted to the outside through the lens is emitted in a widely diffused manner.

[0059] In particular, total internal reflection can occur inside the incident surface through the vertical incident surface formed in the light incident portion of the lens, and there is an effect that the dark portion that can occur at the center of the lens is converted into a bright portion. The light emitted to the side surface of the light emitting element is directly emitted through the flange of the lens, so that there is an effect that the light emitted to the outside is emitted in a widely diffused manner.

[0060] Moreover, with respect to the plurality of protruding incident surfaces that protrude toward the inside of the light incident portion of the lens according to the present invention, the path of light incident on the lens can be adjusted by using the shape and position of the protruding incident surfaces, so that the light emitted to the outside through the lens can be adjusted to be emitted more uniformly.

[0061] In addition, a plurality of flange protruding portions that protrude toward the outside of the flange of the lens are formed, and since the distance by which the flange protruding portions protrude is greater than the distance by which the gate molding portion protrudes during the production of the lens, scratches caused by the gate molding portion on the surface of the lens can be prevented.

[0062] In particular, a leg protruding portion is formed on the leg of the lens, and a substrate hole is formed in the substrate for the formed leg protruding portion to be inserted, thereby improving the bonding force when the lens is mounted on the substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 is a perspective view illustrating a light emitting module according to a first embodiment of the present invention.

[0064] Figure 2 is a cross-sectional view taken along the long axis direction of the light emitting portion of the lens included in the light emitting module according to the first embodiment of the present invention.

[0065] Figure 3 is a diagram illustrating Figure 2 region A of

[0066] Figure 4 is a diagram illustrating Figure 2 region B of

[0067] Figure 5 is a cross-sectional view taken along the short axis direction of the light emitting portion of the lens included in the light emitting module according to the first embodiment of the present invention.

[0068] Figure 6a and Figure 6b is a diagram for comparing the path of light emitted from the light emitting module according to the first embodiment of the present invention with the prior art.

[0069] Figures 7a to 7c is a diagram illustrating a modified example of the light incident portion of the lens included in the light emitting module according to the first embodiment of the present invention.

[0070] Figure 8 is a perspective view for explaining the bonding relationship between the light emitting module and the reflecting sheet according to the first embodiment of the present invention.

[0071] Figure 9 is a diagram illustrating the long axis direction of the light emitting portion of the lens for explaining the bonding relationship between the light emitting module and the reflecting sheet according to the first embodiment of the present invention.

[0072] Figure 10 This is a diagram showing a backlight module with a light-emitting module according to a first embodiment of the present invention mounted on a substrate.

[0073] Figure 11 This is a diagram showing a backlight unit of a 32-inch display device provided with a light-emitting module according to a first embodiment of the present invention.

[0074] Figure 12a And Figure 12b This is a diagram for comparing the backlight unit of a 55-inch display device provided with an existing light-emitting module and the backlight unit of a 55-inch display device provided with a light-emitting module according to a first embodiment of the present invention.

[0075] Figure 13 This is a perspective view of a light-emitting module according to a second embodiment of the present invention.

[0076] Figure 14 This is a plan view of a lens of a light-emitting module according to a second embodiment of the present invention.

[0077] Figure 15 This is a side view in the short-axis direction of the light-emitting portion of a lens included in a light-emitting module according to a second embodiment of the present invention.

[0078] Figure 16 This is a side view in the long-axis direction of the light-emitting portion of a lens included in a light-emitting module according to a second embodiment of the present invention.

[0079] Figure 17 This is a diagram for explaining the path of light emitted from a light-emitting module according to a second embodiment of the present invention.

[0080] Figure 18 This is a perspective view of a light-emitting module according to a third embodiment of the present invention.

[0081] Figure 19 This is a side view of a light-emitting module according to a third embodiment of the present invention. Reference numerals:

[0082] 100: Light-emitting module

[0083] 110: Light-emitting element

[0084] 120: Lens

[0085] 121: Light-incident portion 121a: Incident surface

[0086] 121aa: Vertical incident surface 121ab: Inclined incident surface

[0087] 121b: Projecting incident surface

[0088] 123: Light-emitting part 125: Lower surface

[0089] 127: Flange

[0090] 127a: Flange boundary part 127b: Flange protruding part

[0091] 129: Leg 129a: Leg protruding part

[0092] 131: Protruding surface

[0093] 133: Inclined surface 133a: Inclined surface boundary part

[0094] 200: Substrate 202: Substrate hole

[0095] 210: Reflective sheet

[0096] 300, 400: Backlight unit 310: Backlight module Detailed implementation mode

[0097] The preferred embodiments of the present invention will be specifically described with reference to the accompanying drawings.

[0098] Figure 1 is a perspective view of a light-emitting module according to a first embodiment of the present invention. Figure 2 is a cross-sectional view of the light-emitting part of the lens included in the light-emitting module according to the first embodiment of the present invention in the long-axis direction, Figure 3 is a diagram showing Figure 2 the A area of, and in addition Figure 4 is a diagram showing Figure 2 the B area of. Figure 5 is a cross-sectional view of the light-emitting part of the lens included in the light-emitting module according to the first embodiment of the present invention in the short-axis direction.

[0099] Refer to Figure 1 , the light-emitting module 100 according to the first embodiment of the present invention includes a light-emitting element 110 and a lens 120.

[0100] The light-emitting element 110 is arranged on the substrate 200. At this time, the substrate 200 has insulation, and a conductive circuit may be formed on its upper part. In addition, the substrate 200 serves to support the light-emitting element 110 and the lens 120. In this embodiment, the substrate 200 may be a printed circuit board and may have a mounting groove for mounting the light-emitting element 110.

[0101] The light-emitting element 110 is mounted on the substrate 200 and can be mounted in the mounting groove when the mounting groove is formed on the substrate 200. The light-emitting element 110 has a package form in which a light-emitting diode chip is mounted on a housing or an auxiliary substrate, or may be a form in which a light-emitting diode chip is directly mounted on the substrate 200.

[0102] When the light-emitting element 110 is in the form of a light-emitting diode chip, the light-emitting diode chip may include a light-emitting structure including an n-type semiconductor layer, an active layer, and a p-type semiconductor layer. In addition, it may be a flip-chip type in which an n-type electrode electrically connected to the n-type semiconductor layer and a p-type electrode electrically connected to the p-type semiconductor layer are arranged in one direction, or a vertical type in which the n-type electrode and the p-type electrode are arranged in different directions. Here, the n-type semiconductor layer, the active layer, and the p-type semiconductor layer may each include a compound semiconductor of the III-V group series. As an example, it may include a nitride semiconductor such as (Al, Ga, In)N.

[0103] The n-type semiconductor layer may be a conductive semiconductor layer including an n-type impurity (e.g., Si), and the p-type semiconductor layer may be a conductive semiconductor layer including a p-type impurity (e.g., Mg). In addition, the active layer may be sandwiched between the n-type semiconductor layer and the p-type semiconductor layer and may include a multi-quantum well structure. In addition, the composition ratio may be determined in such a way as to emit light of a desired peak wavelength to the outside. In this embodiment, the composition ratio of the light-emitting diode chip may be determined in such a way as to emit blue light or ultraviolet light to the outside.

[0104] The lens 120 is provided to disperse the light emitted from the light-emitting element 110 and is arranged to cover the light-emitting element 110. For this purpose, the lens 120 may have an incident surface 121a on which the light emitted from the light-emitting element 110 is incident and a light-emitting portion 123 for emitting light from the lens 120 to the outside. In this embodiment, the lower part of the lens 120 includes a light-incident portion 121 having a concave shape, and the inner surface of the light-incident portion 121 may be the incident surface 121a.

[0105] As shown in the figure, the light-incident portion 121 is formed in the lower part of the lens 120 and may be arranged at the center of the lens 120. As shown in the figure, the shape of the light-incident portion 121 may have a concave shape like a bell shape. In addition, the cross section of the light-incident portion 121 may be an elliptical shape having a major axis along the y-axis. In this embodiment, the short-axis direction of the elliptical light-incident portion 121 is defined as the x-axis direction, and the long-axis direction of the light-incident portion 121 is defined as the y-axis direction for description.

[0106] In addition, the incident surface 121a as the inner side surface of the lens 120 may have a curved surface as a whole. As in this embodiment, the incident surface 121a may include a vertical incident surface 121aa arranged at the lower part of the light-incident portion 121 and an inclined incident surface 121ab arranged at the upper part of the vertical incident surface 121aa.

[0107] The vertical incident surface 121aa is formed to be perpendicular to the horizontal plane from the entrance of the light incident portion 121 to a predetermined height position. The inclined incident surface 121ab is located above the vertical incident surface 121aa and may have a curved surface as a whole. In addition, the vertical incident surface 121aa and the protruding surface 131 of the lens 120 may extend.

[0108] Moreover, in the present embodiment, a protruding incident surface 121b may be formed on the inclined incident surface 121ab. The protruding incident surface 121b is disposed on the inclined incident surface 121ab and may be formed in a shape protruding toward the inner side of the light incident portion 121. The protruding incident surface 121b may generally have an elliptical shape and may be formed in a shape protruding into a curved surface.

[0109] As Figure 1 and Figure 2 shown in the figure, the protruding incident surfaces 121b may be arranged in a pair at positions facing each other in the minor axis direction (x-axis direction) of the light incident portion 121. As described above, the light incident portion 121 may be formed in an elliptical shape having a major axis in the y-axis direction and a minor axis in the x-axis direction. Therefore, the incident surface 121a formed in the y-axis direction may be formed as a wider surface than the incident surface 121a formed in the x-axis direction. The protruding incident surface 121b is formed on the incident surface 121a that is formed to be relatively wide in this way, and the path of the light incident on the lens 120 may be changed by the protruding incident surface 121b.

[0110] In the present embodiment, the case where the protruding incident surfaces 121b are formed in a pair is described. However, according to needs, a plurality of protruding incident surfaces 121b may be formed on the inclined incident surface 121ab. Also, it is described that the protruding incident surface 121b is formed on the inclined incident surface 121ab. However, according to needs, the protruding incident surface 121b may be formed on the vertical incident surface 121aa, and the protruding incident surface 121b is formed through the vertical incident surface 121aa and the protruding incident surface 121b.

[0111] In addition, the lower surface 125 of the lens 120 may generally have a planar shape. A protruding surface 131 may be formed at the center of the lower surface of the lens 120 with the entrance of the light incident portion 121 as the center. As Figure 3 shown in the figure, the protruding surface 131 may be formed in a shape in which a part of a sphere is combined with the lower surface 125 of the lens 120. That is, the protruding surface 131 may be an integral surface formed by combining a part cut from a spherical shape with the lower surface 125 of the lens 120, and as Figure 3 and Figure 5 shown in the figure, it may be formed in a shape protruding from the lower surface 125 of the lens 120.

[0112] At this time, a light incident portion 121 may be disposed at the center of the protruding surface 131, and the perpendicular incident surface 121aa of the light incident portion 121 may be connected to the protruding surface 131. Additionally, although not shown, it can be seen from the plan view of the lens 120 that the center of the protruding surface 131 and the center of the light incident portion 121 coincide.

[0113] Moreover, an inclined surface 133 may be formed on the lower surface 125 of the lens 120. As Figure 4 shown, the inclined surface 133 may be formed outside the long axis direction (x-axis direction) of the lower surface 125 of the lens 120, and may be a surface that gradually slopes downward toward the outside. Accordingly, the vertical distance between the inclined surface 133 and the virtual lower surface 125a that extends the lower surface 125 of the lens 120 in the horizontal direction may gradually increase toward the outside of the lens 120.

[0114] At this time, as Figure 2 and Figure 4 shown, although the inclined surface 133 is shown as being formed vertically in the cross-sectional view, it may be formed as a convex or concave curve as needed.

[0115] Referring back to Figure 1 , the inclined surface 133 is disposed outside along the long axis direction of the lens 120, and an inclined surface boundary portion 133a may be formed between the lower surface 125 of the lens 120 and the inclined surface 133. In this embodiment, it is described that the inclined surface boundary portion 133a is formed as a straight line, but it may also be formed as a curve as needed. And, the inclined surface boundary portion 133a may be formed along the short axis direction (y-axis direction) of the light emitting portion 123 of the lens 120. Accordingly, in Figure 2 the cross-sectional view in the long axis direction of the light emitting portion 123 of the lens 120 shown, the inclined surface 133 is shown, while in Figure 5 the cross-sectional view in the long axis direction of the light emitting portion 123 of the lens 120 shown, the inclined surface 133 is not shown.

[0116] In addition, the inclined surface 133 is formed outside the protruding surface 131. There may also be a case where the inclined surface 133 and the protruding surface 131 partially overlap as needed.

[0117] In this embodiment, the inclined surface 133 may reflect the light reflected from the inner side surface of the light emitting portion 123 of the lens 120 or the light reflected from the inner side surface of the flange 127 again toward the light emitting portion 123 or the flange 127 side on the inclined surface 133.

[0118] The light-emitting portion 123 can form the outer shape of the lens 120 as the surface for emitting the light incident on the lens 120 to the outside. In addition, the cross-section of the light-emitting portion 123 can be an elliptical shape having a major axis in the x-axis direction or a shape combining a curve and a straight line. In the present embodiment, the minor axis direction of the light-emitting portion 123 having an elliptical planar shape is the y-axis direction, and the major axis direction of the light-emitting portion 123 is the x-axis direction. That is, the major axis directions of the light-incident portion 121 and the light-emitting portion 123 can be arranged perpendicular to each other.

[0119] Here, the ratio difference between the major axis and the minor axis of the elliptical shape of the light-incident portion 121 can be larger than that of the elliptical shape of the light-emitting portion 123. That is, compared with the elliptical shape of the light-incident portion 121, the elliptical shape of the light-emitting portion 123 can be an elliptical shape closer to a circular shape. Accordingly, among the light incident on the lens 120 through the light-incident portion 121, the light incident on the lens 120 in the minor axis direction of the light-incident portion 121 can be diffused relatively wider than the light incident in the major axis direction of the light-incident portion 121 when emitting light to the outside of the lens 120.

[0120] In addition, in the present embodiment, the lens 120 may further include a flange 127 connecting the light-emitting portion 123 and the lower surface 125 of the lens 120. The flange 127 can be arranged along the outer contour of the light-emitting portion 123, and the longitudinal section of the flange 127 can be formed perpendicular to the lower surface 125 of the lens 120. At this time, the thickness of the flange 127 can be different according to the position of the light-emitting portion 123. In the present embodiment, the thickness t1 of the flange 127 located in the major axis direction of the light-emitting portion 123 can be relatively thicker than the thickness t2 of the flange 127 located in the minor axis direction of the light-emitting portion 123. In addition, the thickness of the flange 127 can be the thickest in the major axis direction of the light-emitting portion 123 and the thinnest in the minor axis direction of the light-emitting portion 123. At this time, as Figures 1 to 5 illustrated, the flange boundary portion 127a serving as the boundary between the flange 127 and the light-emitting portion 123 can be formed as a curve. Of course, the flange boundary portion 127a between the light-emitting portion 123 and the flange 127 of the lens 120 is not limited to being formed as a curve, and the flange boundary portion 127a can be formed as a straight line according to needs.

[0121] In addition, a plurality of legs 129 can be arranged on the lower surface 125 of the lens 120. The legs 129 can be arranged around the light-incident portion 121, can have a predetermined thickness, and can serve as a reference for correctly mounting the lens 120 when the lens 120 is combined with the substrate 200.

[0122] At this time, multiple legs 129 can be arranged longer in the longitudinal direction of the light incident portion 121. That is, in this embodiment, four legs 129 are arranged, and two legs 129 can be arranged on one side of the longitudinal direction of the light incident portion 121 at a first interval W1, and the remaining two legs 129 can be arranged on the opposite side of one side of the longitudinal direction of the light incident portion 121 at a second interval W2. At this time, the first interval W1 and the second interval W2 can be the same as each other. In addition, the interval between the two legs 129 arranged on one side of the light incident portion 121 and the two legs 129 arranged on the other side can be wider than the first interval W1 and the second interval W2.

[0123] At this time, multiple legs 129 can be arranged on the outer contour of the protruding surface 131 formed on the lower surface 125 of the lens 120, and can be arranged inside the inclined surface 133 formed on the lower surface 125 of the lens 120. That is, multiple legs 129 can be arranged between the protruding surface 131 and the inclined surface 133, and can be arranged on the flat lower surface 125. Of course, the position where multiple legs 129 are arranged is not limited to this, and can be arranged on the inclined surface 133 as needed.

[0124] Figure 6a and Figure 6b is used to compare the path of the light emitted from the light emitting module according to the first embodiment of the present invention with the prior art.

[0125] Figure 6a is a diagram illustrating the path of the light emitted from the light emitting element 110 in the lens 120 where the incident surface 121b does not protrude in the light incident portion 121 of the lens 120 included in the light emitting module 100. Figure 6b is a diagram illustrating the path of the light emitted from the light emitting element 110 in the lens 120 where the protruding incident surface 121b is formed in the light incident portion 121 of the lens 120 included in the light emitting module 100 of this embodiment.

[0126] As Figure 6a illustrated, the light emitted from the central portion, the left portion, and the right portion of the light emitting element 110 is incident through the incident surface 121a of the lens 120, so that the light emitted to the outside through the light emitting portion 123 of the lens 120 can be separated and emitted to the outside respectively.

[0127] Thus, if the protruding incident surface 121b is formed on the incident surface 121a in the same lens 120, then as Figure 6bAs shown, the path of the light incident on the lens 120 can be changed, and accordingly, the distribution of the light emitted to the outside through the light-emitting part 123 of the lens 120 can also be changed. Accordingly, as described above, a protruding incident surface 121b is formed on the incident surface 121a of the lens 120, so that the light emitted to the outside of the lens 120 can be minimized from concentrating on a predetermined position, and the path of the light can be changed to achieve a uniform distribution. Also, the situation where the light emitted from the light-emitting element 110 is reflected without being incident on the lens 120 through the incident surface 121a can be minimized.

[0128] Figures 7a to 7c FIG. is a diagram showing a modified example of the light-incident part of the lens included in the light-emitting module according to the first embodiment of the present invention.

[0129] In this embodiment, the light-incident part 121 of the lens 120 included in the light-emitting module 100 can be changed respectively as Figures 7a to 7b shown.

[0130] As Figure 7a shown, the inclined incident surface 121ab can be connected to the upper part of the vertical incident surface 121aa. At this time, the inclined incident surface 121ab can be formed to extend at the upper end of the vertical incident surface 121aa.

[0131] In addition, as Figure 7b shown, the width of the vertical incident surface 121aa can be formed to be greater than the width of the inclined incident surface 121ab. That is, the vertical incident surface 121aa is formed starting from the entrance of the light-incident part 121, and the inclined incident surface 121ab can be formed at a position where a step is formed toward the inside of the light-incident part 121 compared to the vertical incident surface 121aa. Accordingly, the light incident on the lens 120 through the light-incident part 121 can be incident on the lens 120 through the step formed between the vertical incident surface 121aa and the inclined incident surface 121ab.

[0132] Also, as Figure 7c shown, the step can be formed on the vertical incident surface 121aa. That is, above the part where the vertical incident surface 121aa is formed from the entrance of the light-incident part 121 to a predetermined height, the vertical incident surface 121aa can be formed again at a position where a step is formed toward the inside of the light-incident part 121. In addition, the inclined incident surface 121ab can be formed above the vertical incident surface 121aa arranged at the upper part. In this way, the vertical incident surface 121aa is formed in two steps to change the path of the light incident on the lens 120.

[0133] As described above, making the shape of the light-incident surface different means changing the path of the light incident on the lens 120 to change the distribution of the light emitted to the outside through the light-emitting part 123 of the lens 120, so as to improve the dark part and the bright part that may occur in a part of the interval.

[0134] Figure 8 is a perspective view for explaining the bonding relationship between the light-emitting module and the reflective sheet according to the first embodiment of the present invention, and, Figure 9 is a view illustrating the long-axis direction of the light-emitting portion of the lens for explaining the bonding relationship between the light-emitting module and the reflective sheet according to the first embodiment of the present invention.

[0135] In this embodiment, a reflective sheet 210 may be bonded to the lower portion of the light-emitting module 100. In order to reflect the light emitted from the light-emitting module 100 and irradiated toward the reflective sheet 210 upward, the reflective sheet 210 may be disposed below the light-emitting module 100. In the prior art, the reflective sheet 210 disposed below the light-emitting module 100 is fixed to the backlight unit 300 to which the substrate 200 is fixed by using an adhesive sheet or an adhesive. In this embodiment, instead of fixing the reflective sheet 210 to the backlight unit 300 by using an adhesive sheet or an adhesive, the reflective sheet 210 may be fixed by using the lens 120.

[0136] As described above, in the lens 120 included in the light-emitting module 100 according to this embodiment, an inclined surface 133 that slopes downward toward the outside of the lower surface 125 is formed, and the reflective sheet 210 disposed below the light-emitting module 100 may be fixed by using such a downward-sloping inclined surface 133.

[0137] As Figure 8 illustrated, a placement hole H may be formed at the position where the reflective sheet 210 is disposed on the light-emitting module 100. Accordingly, the reflective sheet 210 is disposed below the lens 120 included in the light-emitting module 100, so that it can be disposed above the substrate 200. At this time, the size of the placement hole H formed in the reflective sheet 210 may be smaller than the size of the lens 120 included in the light-emitting module 100.

[0138] Since the size of the placement hole H formed in the reflective sheet 210 is formed to be smaller than the size of the lens 120, the reflective sheet 210 is pressed by the lens 120, so that it can be fixed to the backlight unit 300 even without using other adhesives or adhesive sheets. Here, a part of the inclined surface 133 formed in the lens 120 contacts the reflective sheet to fix the reflective sheet.

[0139] Figure 10 is a view illustrating the backlight module provided in the light-emitting module according to the first embodiment of the present invention, Figure 11 is a view illustrating the backlight unit of a 32-inch light-emitting device provided with the light-emitting module according to the first embodiment of the present invention.

[0140] Refer to Figure 10, the backlight module 310 includes a substrate 200 and a plurality of light-emitting modules 100. A plurality of light-emitting modules 100 can be arranged on the substrate 200. The substrate 200 can be configured in the shape of a bar having a length direction, and a conductive circuit for supplying power to the light-emitting elements 110 mounted on the upper surface can be formed. With the plurality of light-emitting elements 110 coupled to the conductive circuit of the substrate 200, a lens 120 is arranged to cover the plurality of light-emitting elements 110, thereby forming the light-emitting module 100.

[0141] At this time, as Figure 10 illustrated, the lens 120 is arranged on the substrate 200 such that the major axis direction of the light-incident portion 121 is aligned with the length direction of the substrate 200. Accordingly, the lens 120 can be arranged such that the major axis of the light-emitting portion 123 of the lens 120 is perpendicular to the length direction of the substrate 200, and can be arranged in a state where the lens 120 protrudes outward from the substrate 200. Also, the width in the minor axis direction of the light-incident portion 121 of the lens 120 can be smaller than the width of the substrate 200. In addition, the leg portion 129 of the lens 120 can be coupled to the substrate 200, whereby the lens 120 is coupled to the substrate 200.

[0142] In addition, referring to Figure 11 , the backlight unit 300 of a 32-inch display device can include the backlight module 310. The backlight module 310 can include a plurality of light-emitting modules 100 arranged at a predetermined pitch on a substrate 200 having a predetermined length.

[0143] At this time, one backlight module 310 can be provided in the 32-inch backlight unit 300, and the backlight module 310 can be arranged at the center of the backlight unit 300 along the length direction of the backlight unit 300. Accordingly, the light emitted from the plurality of light-emitting modules 100 is emitted with a light distribution characteristic including a direction perpendicular to the length direction of the substrate 200, so that the entire surface of the backlight unit 300 can be irradiated.

[0144] In this embodiment, although a 32-inch display device is described as an example, the backlight module 310 can also be used in display devices having larger sizes other than this. At this time, in the case of using a plurality of backlight modules 310 as needed, the plurality of backlight modules 310 can be arranged in a direction perpendicular to the length direction of the backlight unit 300. The plurality of backlight modules 310 can be arranged with a predetermined distance between them.

[0145] Figure 12a and Figure 12b are diagrams illustrating a comparison between the backlight unit of a 55-inch display device provided with a conventional light-emitting module and the backlight unit of a 55-inch display device provided with the light-emitting module according to the first embodiment of the present invention.

[0146] First, in the backlight unit 40 of the 55-inch display device provided with the existing light-emitting module 10 shown in FIG. 12, as shown, ten backlight modules 31 are arranged in five rows. At this time, the ten backlight modules 31 are arranged in a manner that two backlight modules form one row along the length direction of the backlight unit.

[0147] In addition, each backlight module 31 includes a substrate 20 and five light-emitting modules 10, and each light-emitting module 10 includes a lens having a circular shape. Accordingly, the light emitted from each backlight module 31 can irradiate the entire surface of the backlight unit 40.

[0148] In contrast, Figure 12b In the backlight unit 400 of the 55-inch display device provided with the light-emitting module 100 according to the present embodiment as shown, three backlight modules 310 can be respectively arranged in a direction perpendicular to the length direction of the backlight unit 400. As shown, the backlight module 310 includes a substrate 200 having a length in one direction and a plurality of light-emitting modules 100 arranged on the substrate 200. Accordingly, the backlight module 310 has a length in one direction like the substrate 200. In addition, the three backlight modules 310 arranged in the backlight unit 400 of the 55-inch display device can be arranged in a direction perpendicular to the length direction of the backlight unit 400.

[0149] In addition, in each backlight module 310, the light emitted from the plurality of light-emitting modules 100 on the substrate 200 is emitted with a light distribution characteristic including a direction perpendicular to the length direction of the substrate 200, so that it can irradiate the entire surface of the backlight unit 400.

[0150] Thus, if the backlight module 310 according to the present embodiment is used, the number of light-emitting modules 100 provided in the backlight unit 40 can be significantly reduced compared to the prior art.

[0151] In addition, according to the size of the display device, the number of backlight modules 310 arranged in the backlight units 300 and 400 and the number of light-emitting modules 100 arranged on the substrate 200 can be changed.

[0152] Figure 13 is a perspective view showing a light-emitting module according to a second embodiment of the present invention, Figure 14 is a plan view showing a lens of a light-emitting module according to a second embodiment of the present invention. In addition, Figure 15 is a side view showing the short-axis direction of the light-emitting portion of the lens included in the light-emitting module according to a second embodiment of the present invention, Figure 16 is a side view showing the long-axis direction of the light-emitting portion of the lens included in the light-emitting module according to a second embodiment of the present invention.

[0153] Refer to Figure 13, the light emitting module 100 according to the second embodiment of the present invention includes a light emitting element 110 and a lens 120. When describing the light emitting module 100 according to the second embodiment of the present invention, the same description as that of the first embodiment is omitted.

[0154] In this embodiment, the lens 120 is arranged to disperse the light emitted from the light emitting element 110 and is arranged to cover the light emitting element 110. To this end, the lens 120 may have a light incident portion 121 for allowing the light emitted from the light emitting element 110 to enter and a light emitting portion 123 for emitting the incident light to the outside.

[0155] As shown in the figure, the light incident portion 121 is formed at the lower portion of the lens 120 and may be arranged at the center of the lens 120. The shape of the light incident portion 121 may have a concave shape like a bell shape. In addition, the cross section of the light incident portion 121 may be an elliptical shape having a long axis in the y-axis direction and a short axis in the x-axis direction.

[0156] An incident surface 121a, which is the inner surface of the light incident portion 121, is the surface where light enters the lens 120, and the incident surface 121a includes a vertical incident surface 121aa arranged at the lower portion of the light incident portion 121 and an inclined incident surface 121ab arranged at the upper portion of the vertical incident surface 121aa.

[0157] In addition, referring to Figure 14 , a protruding incident surface 121b may be formed on the inclined incident surface 121ab. In this embodiment, six protruding incident surfaces 121b may be formed on the inclined incident surface 121ab in total, and three may be formed on each of the relatively wider surfaces of the inclined incident surface 121ab. The protruding incident surface 121b may be formed to protrude in the inner direction of the light incident portion 121 and may be generally formed in an elliptical shape.

[0158] In this embodiment, three protruding incident surfaces 121b are arranged in the long axis direction on the inclined incident surface 121ab. Among them, the three protruding incident surfaces 121b arranged on one surface of the inclined incident surface 121ab may be arranged side by side in the horizontal direction. In addition, the protruding incident surface 121b arranged at the center among the side-by-side arranged protruding incident surfaces 121b may be formed larger than the protruding incident surfaces 121b arranged on both sides.

[0159] In this embodiment, the flange boundary portion 127a is formed as a curve as in the first embodiment. In addition, referring to Figure 15 , the distance between the flange boundary portion 127a and the lower surface 125 is formed relatively large in the long axis direction of the light incident portion 121 (the short axis direction of the light emitting portion 123 of the lens 120, the y-axis direction), and referring to Figure 16The distance between the flange boundary portion 127a and the lower surface 125 is formed to be relatively small in the minor axis direction of the light incident portion 121 (the major axis direction of the light emitting portion 123 of the lens 120, the x-axis direction).

[0160] As described above, in a state where the flange boundary portion 127a is formed as a curve, the protruding incident surface 121b can be disposed at a position lower than the flange boundary portion 127a in the major axis direction of the light incident portion 121 (the minor axis direction of the light emitting portion 123 of the lens 120, the y-axis direction), and can be disposed at a position higher than the flange boundary portion 127a in the minor axis direction of the light incident portion 121 (the major axis direction of the light emitting portion 123 of the lens 120, the x-axis direction).

[0161] In addition, in the present embodiment, a plurality of legs 129 are arranged and can be arranged along the major axis direction of the light incident portion 121, and can be arranged at a position closer to the outer contour than in the first embodiment. Further, at positions adjacent to the legs 129, flange protruding portions 127b can be respectively formed on the outer side of the flange 127. Although the flange protruding portions 127b are described as being arranged adjacent to the legs 129, it is not limited thereto, and they can be arranged regardless of the positions where the legs 129 are arranged as needed.

[0162] The flange protruding portion 127b can be formed in a shape protruding outward from the flange 127, as Figure 13 and 14 shown in the figure, and can be formed in a shape in which a part of a circular shape protrudes. And referring to Figure 16 the upper surface of the flange protruding portion 127b can be formed along the flange boundary portion 127a. Therefore, the upper surface of the flange protruding portion 127b can be formed as a curved surface.

[0163] In the present embodiment, four flange protruding portions 127b can be arranged. At this time, a gate forming portion G can be formed between two of the flange protruding portions 127b. The gate forming portion G can be formed during the injection molding of the lens 120 according to the present embodiment, and the gate forming portion G can be formed in a shape protruding outward from the flange 127. At this time, the distance by which the flange protruding portion 127b protrudes from the flange 127 can be formed to be larger than the distance by which the gate forming portion G formed between two of the flange protruding portions 127b protrudes from the flange 127.

[0164] At this time, during the storage in a state where a large number of lenses 120 are mixed or during the process of mounting the lens 120 on the substrate 200, scratches or the like may occur on the surface (light emitting surface, etc.) of the lens 120 due to the gate forming portion G whose end can be formed sharply. However, in the present embodiment, the flange protruding portion 127b protrudes more than the gate forming portion G, so that scratches or the like caused by the gate forming portion G on the surface (light emitting surface) of the lens 120 can be prevented.

[0165] Figure 17 This is a diagram for explaining the path of light emitted from the light-emitting module according to the second embodiment of the present invention.

[0166] The light emitted from the light-emitting element 110 through the flange protrusion 127b can be incident on the lens 120 as illustrated in (a) of Figure 17 . Additionally, as illustrated in (b) of Figure 17 , it can be emitted to the outside through the light-emitting portion 123. At this time, in the present embodiment, as illustrated in (b) of Figure 17 , the flange protrusion 127b can be arranged at a position where, when the light incident on the lens 120 through the protruding incident surface 121b of the light-incident portion 121 is emitted to the light-emitting surface, it will not be affected by the flange protrusion 127b.

[0167] That is, in the present embodiment, the lens 120 forms the path of light in such a manner that the light emitted from the light-emitting element 110 is concentrated in the short-axis direction (x-axis direction) of the light-emitting portion 123 through the lens 120. At this time, a plurality of protruding incident surfaces 121b are formed in the light-incident portion 121, so that the path of light concentration can be changed relatively more, and it is possible to prevent the light from concentrating on or not reaching a specific position. Additionally, as described above, the flange protrusion 127b is formed so as not to deviate from the path of the light emitted through the lens 120, thereby preventing the light from concentrating on a specific position due to the flange protrusion 127b.

[0168] Figure 18 This is a perspective view illustrating a light-emitting module according to the third embodiment of the present invention, Figure 19 This is a side view illustrating a light-emitting module according to the third embodiment of the present invention.

[0169] Referring to Figure 18 and Figure 19 , the light-emitting module 100 according to the third embodiment of the present invention includes a light-emitting element 110 and a lens 120. When explaining the light-emitting module 100 according to the third embodiment of the present invention, the same explanations as those in the first embodiment and the second embodiment are omitted.

[0170] In the present embodiment, a plurality of legs 129 formed on the lens 120 can be configured, and leg protrusions 129a can be formed on a part or all of the plurality of legs 129. The leg protrusions 129a can be formed in a shape protruding downward from the legs 129, and the diameter of the leg protrusions 129a can be smaller than the diameter of the legs 129. In the present embodiment, the case where the planar shape of the legs 129 is circular and the planar shape of the leg protrusions 129a is also circular is described, but it is not limited thereto, and various shapes can be formed as needed.

[0171] In addition, a substrate hole 202 may be formed at a position in the substrate 200 provided with the lens 120 corresponding to the leg protrusion 129a of the leg 129 of the lens 120. The substrate hole 202 is formed to penetrate the substrate 200 so as to be able to insert the leg protrusion 129a, and may be formed in a shape corresponding to the leg protrusion so as to be able to insert the leg protrusion 129a.

[0172] Accordingly, as Figure 19 illustrated, when the lens 120 is disposed on the substrate 200, the leg protrusion 129a can be mounted in a state of being inserted into the substrate hole 202. At this time, as the leg protrusion 129a is formed in a shape protruding from the lower portion of the leg 129, in the lower surface of the leg 129 where the leg protrusion 129a is formed, the lower surface of the leg 129 outside the leg protrusion 129a may be formed to be in contact with the upper surface of the substrate 200. In addition, for the leg 129 in which the leg protrusion 129a is not formed, the lower surface of the leg 129 may contact the upper surface of the substrate 200.

[0173] In this way, with the leg protrusion 129a inserted into the substrate hole 202, the lens 120 is mounted on the substrate 200, and in this state, the leg 129 of the lens 120 and the substrate 200 are bonded by an adhesive, thereby improving the bonding force between the lens 120 and the substrate 200.

[0174] Moreover, the light-emitting module 100 according to the first to third embodiments in the present invention can be manufactured according to each embodiment, and if necessary, the optical path can also be manufactured in a state where two or more of the first to third embodiments are combined.

[0175] The above detailed description of the present invention has been made with reference to the embodiments of the accompanying drawings. However, the above embodiments are only illustrative examples of the present invention, and the present invention cannot be understood as being limited only to the embodiments. The scope of the present invention should be understood by the scope described in the claims and its equivalent concepts.

Claims

1. A lens for dispersing light emitted from a light-emitting element, comprising: a lower surface; a light-incident portion having a shape recessed from the lower surface, the light-incident portion having a light-incident surface; and a light-emitting portion, light that enters the lens through the light-incident portion leaves the lens through the light-emitting portion to the outside of the lens, wherein the light-incident surface includes a plurality of protruding light-incident surfaces that protrude inward from the light-incident surface in a curved surface shape and are provided only on the same horizontal plane, and wherein the plurality of protruding light-incident surfaces have an elliptical cross-section having a major axis in the major axis direction of the light-incident portion.

2. The lens according to claim 1, wherein: the light-incident surface further includes an inclined light-incident surface, and the plurality of protruding light-incident surfaces protrude from the inclined light-incident surface.

3. The lens according to claim 1, wherein, the plurality of protruding light-incident surfaces includes a pair of protruding light-incident surfaces facing each other.

4. The lens according to claim 1, wherein, each of the light-incident portion and the light-emitting portion has a major axis and a minor axis in a plan view, and the major axis of the light-incident portion is provided at a right angle to the major axis of the light-emitting portion.

5. The lens according to claim 4, wherein, the light-incident surface further includes an inclined surface, and the plurality of protruding light-incident surfaces are provided on the inclined surface of the light-incident portion along the major axis direction of the light-incident portion.

6. The lens according to claim 1, the lens further includes a flange provided between the light-emitting portion and the lower surface.

7. The lens according to claim 6, wherein, a flange boundary is formed between the flange and the light-emitting portion.

8. The lens according to claim 7, wherein, the plurality of protruding light-incident surfaces are located below the flange boundary in the major axis direction of the light-incident portion.

9. The lens according to claim 7, wherein, the plurality of protruding light-incident surfaces are located above the flange boundary in the minor axis direction of the light-incident portion.

10. A light-emitting module, comprising: a light-emitting element; and a lens provided above the light-emitting element to disperse light emitted from the light-emitting element, the lens including a light-incident portion and a light-emitting portion, light emitted from the light-emitting element enters the lens through the light-incident portion, and the light leaves the lens through the light-emitting portion, wherein: the light-incident portion has a shape recessed from the lower surface of the lens and includes a light-incident surface, the light-incident surface includes a plurality of protruding light-incident surfaces that protrude inward from the light-incident surface in a curved surface shape and are provided only on the same horizontal plane, and the plurality of protruding light-incident surfaces have an elliptical cross-section having a major axis in the major axis direction of the light-incident portion.

11. The light-emitting module according to claim 10, wherein, the light-incident surface includes an inclined surface, and the plurality of protruding light-incident surfaces are provided on the inclined surface.

12. The light-emitting module according to claim 10, wherein, each of the light-incident portion and the light-emitting portion has a major axis and a minor axis in a plan view, and the major axis of the light-incident portion is provided at a right angle to the major axis of the light-emitting portion.

13. The light-emitting module according to claim 12, wherein, the plurality of protruding light-incident surfaces are provided on the inclined surface of the light-incident portion along the major axis direction of the light-incident portion.

14. The light-emitting module according to claim 13, wherein, at least two protruding light-incident surfaces are provided on each inclined surface.

15. The light-emitting module according to claim 10, wherein, the lens further includes: A flange, disposed between the light-emitting portion and the lower surface of the lens; and At least one flange protrusion, protruding partially from the flange in the outward direction of the lens.

16. The light-emitting module according to claim 15, wherein, A curved flange boundary is formed between the flange and the light-emitting portion.

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