WO2020262905A1 - Lentille de source de lumière et module de source de lumière la comprenant - Google Patents

Lentille de source de lumière et module de source de lumière la comprenant Download PDF

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Publication number
WO2020262905A1
WO2020262905A1 PCT/KR2020/008113 KR2020008113W WO2020262905A1 WO 2020262905 A1 WO2020262905 A1 WO 2020262905A1 KR 2020008113 W KR2020008113 W KR 2020008113W WO 2020262905 A1 WO2020262905 A1 WO 2020262905A1
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WO
WIPO (PCT)
Prior art keywords
lens
light source
lens unit
reflective sheet
light
Prior art date
Application number
PCT/KR2020/008113
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English (en)
Korean (ko)
Inventor
한정아
Original Assignee
서울반도체 주식회사
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Publication date
Application filed by 서울반도체 주식회사 filed Critical 서울반도체 주식회사
Publication of WO2020262905A1 publication Critical patent/WO2020262905A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B2003/0093—Simple or compound lenses characterised by the shape

Definitions

  • the present invention relates to a light source module including a light source lens and a light source lens.
  • a liquid crystal display device refers to a display device in which an arrangement is changed according to an applied electric field and a contrast is realized by using liquid crystals having different light transmittances according to directions.
  • a liquid crystal display device requires a backlighting member or a lighting unit for irradiating light to a liquid crystal layer. In this case, when light is concentrated on a specific part, the brightness of the output image is not constant, and thus the image quality may deteriorate. Therefore, in order to improve the image quality, it is necessary to evenly irradiate light to all areas of the liquid crystal layer.
  • the lighting unit that irradiates light to the liquid crystal layer provides a light source to the area overlapping with the liquid crystal layer to irradiate light directly and provides a light source to one side of the display device so that it does not overlap with the liquid crystal layer,
  • the edge type has a disadvantage in that there is a difference in contrast between the edge portion and the center area of the liquid crystal display.
  • the direct type method by providing a plurality of light sources directly under the liquid crystal layer, the difference in contrast between the corner portion and the center area can be reduced, and high quality can be realized.
  • a large number of light sources are required when the liquid crystal display device has a large area.
  • An object of the present invention is to provide a light source lens capable of fixing a reflective sheet without damage and a light source module that is structurally stable and has high light efficiency by employing the light source lens.
  • a first lens unit having a light exit surface convex in a first direction; A second lens unit provided on the opposite side of the light exit surface of the first lens unit and integrally provided with the first lens unit; And a light source accommodating portion configured to receive a light source and formed by removing a portion of the first lens portion and the second lens portion, wherein the second lens portion includes a bottom surface of the second lens portion; And a second lens portion side portion provided adjacent to the second lens portion bottom portion, wherein the second lens portion side portion has an inclined surface forming an angle smaller than 90 degrees with the second lens portion bottom portion in at least a partial area.
  • a light source lens is provided.
  • the side surface of the second lens unit may include a vertical surface of the side surface of the second lens unit perpendicular to the bottom surface of the second lens unit; And a second lens unit side inclined surface forming an angle smaller than 90 degrees with the second lens unit bottom surface, wherein the second lens unit side surface vertical surface and the second lens unit side inclined surface are continuously provided, Is provided.
  • a light source lens having a height of the inclined surface of the side surface of the second lens unit is 110 ⁇ m to 550 ⁇ m.
  • the second lens portion side portion further includes a second lens portion protruding portion protruding from the second lens portion side portion, and at least one surface of the second lens portion protruding portion is the second lens portion
  • a light source lens is provided that includes a bottom portion and an inclined surface forming an angle of less than 90 degrees.
  • the second lens unit further includes a lens leg protruding from a bottom surface of the second lens unit, and a side surface of the second lens unit is provided to be spaced apart from the lens leg unit. Is provided.
  • the second lens unit includes an upper surface of the second lens unit that meets the first lens unit, and an area of the upper surface of the second lens unit is larger than the area of the lower surface of the second lens unit.
  • a light source lens is provided.
  • a light source lens is provided, wherein the second lens unit bottom portion includes a second lens unit bottom surface inclined surface inclined in a direction opposite to the direction in which the first lens unit is provided.
  • the light source is provided on a flat surface, and an angle formed between the inclined surface of the lower surface of the second lens unit and the flat surface is smaller than the angle formed by the side surface of the second lens unit and the flat surface.
  • a light source lens is provided.
  • the first lens unit includes a light exit surface for transmitting light emitted from the light source, and the light exit surface has a convex shape opposite to the second lens unit, Is provided.
  • the first lens unit and the second lens unit are provided with a light source lens having an elliptical shape having a major axis and a minor axis in a plane.
  • a light source that emits light; A light source lens covering the light source; A substrate supporting the light source and the light source lens; And a reflection sheet provided on the substrate and reflecting light, the reflection sheet including a reflection sheet hole exposing the substrate by removing a partial region, and the light source lens is provided in the reflection sheet hole,
  • a light source module is provided in which the area of the bottom surface of the light source lens on the plane is less than the area of the reflective sheet hole.
  • the light source lens includes: a first lens unit having a light exit surface convex in a first direction; And a second lens part provided opposite the light exit surface of the first lens part and integrally provided with the first lens part, wherein at least a part of the second lens part is inserted into the reflective sheet hole.
  • the second lens unit is provided with a light source module that contacts the reflective sheet in at least a partial area.
  • the second lens unit may include a bottom surface of the second lens unit in contact with the substrate unit; And a second lens portion side portion provided adjacent to a bottom portion of the second lens portion, wherein the second lens portion side portion is provided to form an angle smaller than 90 degrees with the substrate in at least a partial area, and the second lens portion
  • a light source module is provided in which the side portion contacts the reflective sheet in at least a partial area and presses the reflective sheet toward the substrate.
  • a light source module is provided in which the width of the first lens unit is greater than the width of the reflective sheet hole.
  • the second lens unit bottom portion includes a second lens unit bottom inclined surface inclined toward the substrate, and an angle formed between the second lens unit bottom inclined surface and the substrate is the second A light source module is provided that is smaller than an angle between the side surface of the lens unit and the substrate.
  • a light source module is provided in which the height of the side portion of the second lens unit is greater than the thickness of the reflective sheet.
  • the side surface of the second lens unit may include a vertical surface of the side surface of the second lens unit perpendicular to the substrate; And an inclined surface of the side surface of the second lens unit forming an angle of less than 90 degrees with the substrate.
  • a light source module in which the light source lens includes a lens leg protruding from a bottom surface of the light source lens, and the lens leg is inserted into the substrate.
  • a plurality of reflective sheet holes and a plurality of light source lenses are provided, and a plurality of the reflective sheet holes and a plurality of the light source lenses correspond to each other on a one-to-one basis.
  • a light source module in which the light source lens includes a light source receiving portion accommodating the light source.
  • a light source module having high structural stability and high light efficiency can be provided.
  • FIG. 1 is a perspective view of a light source lens according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of the light source lens of FIG.
  • FIG 3 is a perspective view of a light source lens according to an embodiment of the present invention.
  • FIG. 4 is a cross-sectional view of the light source lens according to FIG. 3 II-II'.
  • FIG. 5 is a perspective view of a light source lens according to an embodiment of the present invention.
  • FIG. 6 is a III-III' cross-sectional view of the light source lens of FIG. 5.
  • FIG. 7 is a side view of a light source lens according to an embodiment of the present invention.
  • FIG. 8 is a perspective view of a light source lens according to FIG. 7.
  • FIG. 9 is a cross-sectional view of a light source module according to an embodiment of the present invention.
  • FIG. 10 is a cross-sectional view showing an enlarged area A1 of FIG. 9.
  • 11A and 11B are cross-sectional views illustrating another form of area A1 of FIG. 9.
  • FIG. 12 is a cross-sectional view of a light source module according to an embodiment of the present invention.
  • FIG. 13 is a plan view of a light source module according to an embodiment of the present invention.
  • FIG. 14 is a perspective view of a display device employing a light source module according to an embodiment of the present invention.
  • FIG. 15 is an exploded perspective view of a display module employing a light source module according to an embodiment of the present invention.
  • first and second may be used to describe various components, but the components should not be limited by the terms. These terms are used only for the purpose of distinguishing one component from another component.
  • a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.
  • Singular expressions include plural expressions unless the context clearly indicates otherwise.
  • the formed direction is not limited only to the upper direction, and includes those formed in the side or lower direction.
  • a part such as a layer, film, region, plate, etc. is said to be “below” another part, this includes not only the case where the other part is “directly below", but also the case where there is another part in the middle.
  • the light source lens may stably fix a member such as a reflective sheet.
  • FIG. 1 is a perspective view of a light source lens according to an exemplary embodiment of the present invention
  • FIG. 2 is a cross-sectional view of the light source lens according to FIG. 1.
  • a light source lens 10 that receives light from a light source and transmits it in a refracted form is provided.
  • the light source lens 10 receives light emitted from a light source, and transmits the light in a refracted form so that the light can spread to a wider area than the light irradiation area by the light source.
  • the light source lens 10 is optically transparent for this purpose, but may be made of a medium having a refractive index relatively higher than the refractive index in the atmosphere.
  • the light source lens 10 may be formed of at least one selected from epoxy resin, acrylic resin, polycarbonate, and polymethyl methacrylate (PMMA).
  • the light source lens 10 spreads the light emitted from the light source to a wide area, even if a light source having a relatively narrow light irradiation angle is used, light can be diffused to a wide area through the light source lens 10 to be irradiated. have.
  • the light source lens 10 includes a first lens unit 100 and a second lens unit 200 and a light source receiving unit 300 provided integrally.
  • the first lens unit 100 may have a light exit surface having a convex shape in the first direction D1. Light emitted from the light source may advance through the light exit surface of the first lens unit 100. Since the light exit surface of the first lens unit 100 has a convex shape, light can be refracted to a relatively wider area.
  • the first lens unit 100 When viewed in a plan view, the first lens unit 100 may have various shapes such as a circle, an ellipse, a rectangle, a square, a rhombus, and a trapezoid. However, the shape of the first lens unit 100 is not limited to the above-described example, and may have various shapes as necessary.
  • the first lens unit 100 may have a symmetrical shape.
  • the first lens unit 100 may have a shape that is rotationally symmetric about an axis drawn in the first direction D1 from the center of the first lens unit 100 in a plan view.
  • the first lens unit 100 may have a surface symmetrical shape with respect to a cross section of the first lens unit 100 cut in the first direction D1. Since the first lens unit 100 has a symmetrical shape, when light is symmetrically emitted from the light source, the light emitted from the light source can be evenly diffused into a wide area.
  • the second lens unit 200 is provided below the first lens unit 100, that is, on the opposite side of the light exit surface of the first lens unit 100 along the first direction D1.
  • the second lens unit 200 may be provided integrally with the first lens unit 100 as described above.
  • the first lens unit 100 and the second lens unit 200 may be simultaneously injection-molded in one injection mold and provided integrally.
  • the second lens unit 200 receives light emitted from a light source and transmits it to the first lens unit 100. Light may be refracted when emitted from a light source and incident on the second lens unit 200. Accordingly, light incident on the second lens unit 200 may be diffused in a wider range than the light irradiation area by the light source.
  • the second lens unit 200 may be fixed to the substrate as described later, and a member such as a reflective sheet provided between the substrate and the light source lens 10 may be fixed.
  • the second lens unit 200 may include a second lens unit side surface 210 and a second lens unit bottom surface unit 220.
  • the second lens portion side portion 210 and the second lens portion bottom portion 220 may form a side surface and a bottom surface of the second lens portion 200, respectively. Accordingly, the light source lens 10 may have a shape continuously connected from the first lens unit 100 to the second lens unit side surface 210 and to the second lens unit bottom unit 220.
  • the second lens unit side surface 210 is connected to the first lens unit 100 and constitutes a side surface of the second lens unit 200.
  • the second lens unit side portion 210 may have an inclined surface in at least a partial area.
  • the second lens portion side portion 210 may have an inclined surface forming an angle smaller than 90 degrees with the second lens portion bottom portion 220.
  • the angle formed by the second lens unit side surface 210 and the second lens unit bottom surface 220 includes a flat surface of the second lens unit bottom surface 220, specifically, the second lens unit bottom surface 220 Among the regions, a plane parallel to the second direction D2 may mean an angle formed with the side surface 210 of the second lens unit.
  • the flat surface of the bottom surface portion 220 of the second lens unit that is, a surface parallel to the second direction D2 may be parallel to a surface provided with a light source.
  • the inclined surface of the second lens portion side portion 210 may be referred to as the second lens portion side portion inclined surface 212, which is connected to the second lens portion side portion inclined surface 212 and is substantially parallel to the first direction D1.
  • the vertical surface provided in such a manner may be referred to as a vertical surface 211 at the side of the second lens unit.
  • the vertical surface 211 of the side surface of the second lens unit is provided parallel to the first direction D1.
  • the second lens part side vertical surface 211 is between the first lens part 100 and the second lens part side inclined surface 212, or between the second lens part side inclined surface 212 and the second lens part bottom part 220 Can be provided to
  • the second lens unit side vertical surface 211 may perform the same function as a threshold so that a member such as a reflective sheet fixed by the second lens unit side inclined surface 212 does not come out of the second lens unit 200.
  • the second lens unit side inclined surface 212 may be an inclined surface forming an angle smaller than 90 degrees with the second lens unit bottom surface 220.
  • the inclined surface 212 at the side of the second lens unit may perform a function of pressing a reflective sheet or the like.
  • the inclined surface 212 of the side surface of the second lens unit presses the reflective sheet in a direction opposite to the first direction D1, it is possible to prevent the reflective sheet from being bent or wrinkled in the process of being fixed.
  • the second lens unit side inclined surface 212 may be provided on at least a partial area of the second lens unit side surface 210.
  • the entire second lens unit side surface 210 may be formed of the second lens unit side surface inclined surface 212, or the second lens unit side surface inclined surface 212 may be provided only in a partial area.
  • the second lens unit side inclined surface 212 may be provided in at least two spaced apart areas of the second lens unit side surface 210. Accordingly, when the reflective sheet is provided, the second lens unit side inclined surface 212 fixes the reflective sheet at at least two points, thereby ensuring mechanical stability.
  • the inclined surface 212 of the side of the second lens unit may form a flat surface of the bottom surface unit 220 of the second lens unit or a first inclination angle R1 with the second direction D2.
  • the first inclination angle R1 may be an acute angle greater than 0 degrees and less than 90 degrees.
  • the second lens portion side portion 210 is lower in the area where the second lens portion side inclined surface 212 is provided, that is, the width toward the opposite side of the first direction D1 You can have this shrinking shape. Accordingly, when the reflective sheet is fixed by the second lens unit 200, the lower surface portion 220 of the second lens unit and the reflective sheet may or may not meet. Accordingly, it is possible to prevent the reflective sheet from being bent or wrinkled while being fixed by the light source lens 10.
  • the size of the first inclination angle R1 formed between the inclined surface 212 of the side surface of the second lens unit and the second direction D2 may vary according to the thickness of the reflective sheet fixed by the light source lens 10. For example, when the thickness of the reflective sheet is relatively thick, the inclined surface 212 of the side surface of the second lens unit in contact with the reflective sheet has a relatively steep inclination, and accordingly, the first inclination angle R1 may be relatively large. On the other hand, when the thickness of the reflective sheet is relatively thin, the inclined surface 212 of the side surface of the second lens unit in contact with the reflective sheet has a relatively gentle inclination, and accordingly, the first inclination angle R1 may be relatively small.
  • the second lens part side inclined surface 212 may have a height H2 of the second lens part side inclined surface along the first direction D1, and the second lens part side vertical surface 211 is in the first direction D1. Accordingly, the side surface of the second lens may have a vertical height H1. In this case, the height H2 of the inclined surface of the side surface of the second lens unit may be greater than the height H1 of the vertical surface of the side surface of the second lens unit. Accordingly, even when a relatively thick reflective sheet is used, the light source lens 10 can stably fix the reflective sheet without being wrinkled. In addition, the height H2 of the inclined surface of the side surface of the second lens unit may be about 110 ⁇ m to about 550 ⁇ m. Since the height H2 of the inclined surface of the side surface of the second lens unit has the above-described range, the light source lens 10 can stably fix the reflective sheet without being wrinkled.
  • the inclined surface 212 of the side of the second lens unit and the vertical surface of the side surface of the second lens unit 211 may be treated to be opaque.
  • the inclined surface 212 of the side of the second lens unit and the vertical surface of the side surface of the second lens unit 211 may be subjected to corrosion treatment by, for example, acid. Accordingly, it is possible to prevent the light emitted from the light source from leaking to the inclined surface 212 at the side of the second lens unit and the vertical surface 211 at the side surface of the second lens unit, thereby preventing the light from advancing in an undesired direction.
  • the second lens unit side surface 210 includes the second lens unit side surface vertical surface 211 and the second lens unit side surface inclined surface 212, so that the light source lens 10 is stable without bending or wrinkled the reflection sheet. Can be fixed with
  • the second lens portion side portion 210 may be connected to the second lens portion bottom portion 220 forming a bottom surface of the second lens portion 200.
  • the second lens unit bottom portion 220 forms a bottom surface of the second lens unit 200.
  • the second lens unit bottom part 220 may be flat as shown in the drawing, but may be provided in a convex shape in some cases.
  • the second lens unit bottom unit 220 may protect the light exit surface of the first lens unit 100 from a member provided under the light source lens 10 and support the first lens unit 100. have.
  • the second lens unit bottom portion 220 may have an area or width smaller than that of an upper surface portion of the second lens unit provided on a surface where the first lens unit 100 and the second lens unit 200 meet. Accordingly, the fixed reflective sheet may be stably fixed without being bent or wrinkled, and the fixed reflective sheet may be prevented from leaving the second lens unit 200 to the outside.
  • the second lens unit bottom surface 220 may meet a member provided under the light source lens 10, for example, a substrate.
  • a lens leg portion 230 protruding from the bottom portion 220 of the second lens portion may be provided.
  • the lens leg portion 230 may be provided in a form protruding from the second lens portion bottom portion 220 to the opposite side of the first direction D1.
  • the lens leg portion 230 may be inserted into the substrate to fix the light source lens 10 to the substrate.
  • a plurality of lens leg portions 230 may be provided.
  • a plurality of lens leg portions 230 may be provided in a form protruding from different areas spaced apart from the second lens portion bottom portion 220.
  • the number of lens legs 230 may vary depending on the size of the light source lens 10. For example, when the light source lens 10 has a width of about 3 mm to about 5 mm of the second lens portion bottom portion 220, the lens leg portion 230 is a different area of the second lens portion bottom portion 220 Can be provided with four. Since a plurality of lens leg portions 230 are provided and the first lens portion 100 and the second lens portion 200 are supported in different regions, mechanical stability may be improved.
  • the shape, diameter, and height of the lens leg portion 230 may vary depending on the shape of the substrate.
  • the lens leg portion 230 may have various shapes such as a circle, an ellipse, a rectangle, a square, a rhombus, and a trapezoid on a plane.
  • the lens leg portion 230 may be provided in a form in which two layers having different diameters come into contact with each other, that is, in a stepwise manner. Details of the coupling form of the lens leg portion 230 and the substrate will be described later.
  • the light source lens 10 further includes a light source receiving unit 300.
  • the light source accommodating part 300 provides an empty space so that a light source can be provided inside the light source accommodating part 300.
  • light emitted from the light source may enter the inner surface of the first lens unit 100 and the inner surface of the second lens unit 200 forming the light source receiving unit 300.
  • the light refracts in the process of incident light to the first lens unit 100 and the second lens unit 200 through the light source receiving unit 300, and accordingly, the light reaches a wider range than the light irradiation range by the light source. It can spread.
  • the light source receiving unit 300 is formed by removing a portion of the first lens unit 100 and the second lens unit 200, and may mean a concave area capable of accommodating a light source.
  • the light source receiving unit 300 may have various shapes such as a circle, an ellipse, a rectangle, a square, a rhombus, and a trapezoid when viewed in a plan view.
  • the light source accommodating part 300 may have a shape in which the width of the light source accommodating part 300 becomes narrower as it goes upward along the first direction D1 from the entrance provided to the second lens part bottom part 220.
  • the light source receiving unit 300 may have a shape of a rotating body rotated with respect to the center of the light source lens 10 (an axis parallel to the first direction D1).
  • the top surface of the light source accommodating part 300 that is, the inner surface of the first lens part 100 may have a flat or convex shape.
  • the top surface of the light source accommodating part 300 has a convex shape, light incident on the top surface of the light source accommodating part 300 refracts in more various directions, and accordingly, the irradiation area of the light may be wider.
  • a light scattering pattern may be provided on the top surface of the light source receiving unit 300.
  • the light scattering pattern may be formed as an uneven pattern. The light scattering pattern helps light incident on the first lens unit 100 to be scattered and diffused in a wider range.
  • the light source lens 10 includes the first lens unit 100 and the second lens unit 200, and the second lens unit 200 is the second lens unit side inclined surface 212 ), a member such as a reflective sheet provided together with the light source lens 10 can be fixed stably and without wrinkles. Accordingly, when the light source lens 10 according to the present invention is used, mechanical stability and reliability are excellent.
  • the shape of the light source lens in which both the inclined surface of the side of the side of the second lens and the vertical surface of the side of the side of the second lens are provided on the side of the second lens unit have been described.
  • the side portion of the second lens unit may consist of only an inclined surface.
  • a shape of a light source lens in which a side portion of the second lens unit is formed only with an inclined surface will be described.
  • FIG. 3 is a perspective view of a light source lens according to an exemplary embodiment of the present invention
  • FIG. 4 is a cross-sectional view of the light source lens according to FIG. 3.
  • the second lens portion side portion 210 of the light source lens 10 does not include a vertical surface of the second lens portion side portion, and includes only the second lens portion side inclined surface 212.
  • the second lens unit 200 is provided in a form in which the second lens unit side inclined surface 212 and the second lens unit bottom unit 220 are continuously connected. Accordingly, when the light source lens 10 fixes the reflection sheet, the reflection sheet may be fixed on the front side of the side surface 210 of the second lens unit.
  • the second lens part side inclined surface 212 is provided on the front side of the second lens part side part 210, and accordingly, the second lens part side part 210 fixes the reflective sheet on the front side, thereby causing the light source lens 10 to The effect of fixing the reflective sheet may be improved.
  • the second lens part side inclined surface 212 When the second lens part side inclined surface 212 is provided on the front side of the second lens part side part 210, the second lens part side inclined surface 212 and the lens leg part 230 may be provided to be spaced apart. Accordingly, there is no fear that the second lens portion side inclined surface 212 affects the lens leg portion 230 to adversely affect the mechanical rigidity of the lens leg portion 230.
  • the inclination of the second lens portion side portion inclined surface 212 may be relatively low. That is, an angle formed by the second lens unit bottom 220 and the second lens unit side inclined surface 212 may be relatively small.
  • the reflective sheet can be fixed in a relatively large area. Accordingly, it is possible to more effectively and stably fix the reflective sheet without damage.
  • the light source lens may have a form having a strong structural rigidity of the light source lens itself while effectively fixing the reflective sheet.
  • a light source lens having such a shape will be described.
  • FIG. 5 is a perspective view of a light source lens according to an embodiment of the present invention
  • FIG. 6 is a III-III' cross-sectional view of the light source lens according to FIG. 5.
  • the second lens portion side portion 210 of the light source lens 10 may further include a second lens portion protrusion 240 protruding from the second lens portion side portion 210.
  • the second lens unit protrusion 240 may have a shape protruding from the second lens unit side surface 210 in the second direction D2. As shown in the drawing, the size of the second lens unit protrusion 240 may be relatively smaller than the size of the second lens unit 200. Specifically, the width and height of the second lens unit protrusion 240 may be relatively smaller than the width and height of the second lens unit 200.
  • the second lens unit protrusion 240 may include a second lens unit protrusion vertical surface 241 and a second lens unit protrusion inclined surface 242.
  • the second lens unit protrusion inclined surface 242 may form a second inclination angle R2 with the second lens unit bottom surface 220.
  • the second lens unit protrusion inclined surface 242 may form a second inclination angle R2 with the second lens unit bottom surface 220 parallel to the second direction D2.
  • the second inclination angle R2 may be an acute angle less than 90 degrees. Accordingly, when the light source lens 10 fixes the reflective sheet, the reflective sheet may be fixed by contacting the inclined surface 242 of the protruding portion of the second lens unit.
  • the second lens unit side surface 210 may be provided only on a vertical surface without an inclined surface. Specifically, the second lens unit side surface 210 may have a surface parallel to the first direction D1 in a region other than the region where the second lens unit protrusion 240 is provided. Since the second lens unit side surface 210 is provided in the above-described shape, structural rigidity of the light source lens 10 may be improved.
  • a plurality of second lens unit protrusions 240 may be provided.
  • the plurality of second lens unit protrusions 240 may be provided to be spaced apart from different regions of the second lens unit side surface 210.
  • two second lens unit protrusions 240 may be provided, and two second lens unit protrusions 240 may be provided symmetrically with respect to the center of the light source lens 10.
  • the plurality of second lens unit protrusions 240 fix the reflective sheet in different regions, so that the reflective sheet may be stably fixed.
  • the work efficiency is excellent because the second lens part protrusion 240 can be held while fixing the light source lens 10 to the substrate.
  • the light source lens 10 is provided with a second lens portion protrusion 240 on the second lens portion side portion 210, and a second lens included in the second lens portion protrusion 240
  • the reflective sheet is stably fixed, the structural rigidity of the light source lens 10 is improved, and work efficiency of fixing the light source lens 10 may be improved.
  • the light source lens may have an anisotropic shape on a plane.
  • a light source lens having an anisotropic shape will be described.
  • FIG. 7 is a side view of a light source lens according to an embodiment of the present invention
  • FIG. 8 is a perspective view of a light source lens according to FIG. 7.
  • the light source lens 10 has an anisotropic shape.
  • the light source lens 10 may be provided in an elliptical shape having a long axis AX1 and a short axis AX2 when viewed in a plan view.
  • the light source lens 10 having an anisotropic shape may receive light isotropically emitted from the light source and distribute the light anisotropically.
  • the second lens unit 200 of the light source lens 10 having an anisotropic shape may also have an anisotropic shape.
  • the second lens unit 200 may also be provided in an elliptical shape having a long axis AX1 and a short axis AX2 on a plane.
  • the second lens unit side surface 210 may be in at least one direction of the major axis AX1 and the minor axis AX2.
  • the second lens unit may include a side inclined surface 212.
  • the second lens unit 200 may include side inclined surfaces 212 of the second lens unit provided at both ends of the long axis AX1.
  • the second lens unit 200 may include inclined surfaces 212 of side surfaces of the second lens unit at both ends of the short axis AX2.
  • the light exit surface of the first lens unit 100 and the bottom surface of the second lens unit 220 of the second lens unit 200 may have a curved shape.
  • the first lens unit 100 may include a first lens unit concave portion 101 on the light exit surface.
  • the first lens unit concave portion 101 may be provided in a form in which the center of the light source receiving unit 300 is aligned. Accordingly, the light exit surface of the first lens unit 100 may be provided in a shape including two areas convex around the first lens unit concave portion 101 when viewed in cross section. That is, the light exit surface of the first lens unit 100 may have a convex shape opposite to the second lens unit 200.
  • the light emitted from the light source may not be concentrated in the center of the light emission surface of the first lens unit 100 but may be distributed to the periphery of the light emission surface. Accordingly, the light diffusion effect by the light source lens 10 may be further improved.
  • the second lens unit 200 may have a convex shape at the bottom portion 220 of the second lens unit.
  • the second lens unit bottom 220 may include a second lens unit bottom inclined surface and a second lens unit bottom flat surface.
  • the inclined surface of the bottom of the second lens unit may be inclined in a direction opposite to the direction in which the first lens unit is provided. That is, the inclined surface of the bottom of the second lens unit may be an inclined surface having a third inclination angle R3 with respect to the flat surface of the bottom of the second lens unit.
  • the flat surface of the bottom of the second lens unit may be in close contact with the substrate. Accordingly, there is no fear of light leaking between the second lens unit bottom portion 220 and the substrate, and light emitted from the light source can be irradiated through the light exit surface without loss.
  • the inclined surface of the bottom of the second lens unit is connected to the inclined surface of the side surface of the second lens unit 212 and may have a third inclination angle R3 as described above.
  • the third inclination angle R3 may be less than 90 degrees, and may be smaller than the first inclination angle R1 of the inclined surface 212 of the side surface of the second lens unit. Accordingly, when viewed from a cross section, the second lens unit side inclined surface 212 and the second lens unit bottom inclined surface may be sequentially provided in a form in which the inclination becomes gentle.
  • the third inclination angle R3 may be less than about 10 degrees.
  • the third inclination angle R3 is provided to be less than about 10 degrees, loss of light emitted from the light source due to total reflection in the light source lens 10 can be reduced, and the light can be diffused in a wide range. .
  • the third inclination angle R3 is provided smaller than the first inclination angle R1, there is no possibility that the reflective sheet fixed by the inclined surface 212 of the side surface of the second lens unit enters under the inclined surface of the bottom of the second lens unit. Accordingly, it is possible to prevent the reflection sheet from being pressed and damaged by the inclined surface of the bottom of the second lens unit.
  • the light source lens 10 since the light source lens 10 has an anisotropic shape, light diffusion may occur anisotropically. Also, since the first lens unit 100 and the second lens unit 200 have a curved shape, a light diffusion effect may be improved.
  • the light source lens according to an embodiment of the present invention may be applied to a light source module that emits light.
  • a light source module including a light source lens will be described.
  • FIG. 9 is a cross-sectional view of a light source module according to an embodiment of the present invention
  • FIG. 10 is an enlarged cross-sectional view of area A1 of FIG. 9.
  • the light source module 1000 may be used in a display device or the like.
  • the light source module 1000 is used in a liquid crystal display device and may be used as a backlight that emits light toward a liquid crystal layer.
  • the use of the light source module 1000 is not limited to the backlight of the liquid crystal display.
  • the light source module 1000 may include a light source lens 10, a substrate 20, a light source 30, and a reflective sheet 40.
  • the above-described light source lens 10 may be applied to the light source lens 10.
  • the light source lens 10 is shown to be a lens having an isotropic shape, a lens having an anisotropic shape, a black hole lens, a flat lens, etc. may also be used in the light source module 1000.
  • the substrate 20 may be a printed circuit board.
  • the light source 30 may be electrically connected to the substrate 20.
  • the substrate 20 may include conductive patterns to which the pads of the light source 30 are bonded to mount the light source 30.
  • one light source 30 is mounted on one substrate 20, but the present invention is not limited thereto.
  • a plurality of light sources 30 may be mounted on one substrate 20, or a plurality of light sources 30 may be mounted on a plurality of substrates 20.
  • the substrate 20 may be a metal-core PCB (MCPCB) based on a metal. In this case, since the substrate 20 contains metal, the thermal conductivity of the substrate 20 is excellent.
  • the substrate 20 may also comprise an insulating substrate material such as FR4.
  • a heat sink for dissipating heat generated from the light source 30 may be further provided on the substrate 20.
  • the substrate 20 may also hold the light source lens 10.
  • the substrate 20 may include a substrate opening 21 to fix the light source lens 10.
  • the substrate opening 21 has a concave shape in which a part of the substrate 20 is removed from the upper surface of the substrate 20 on which the light source lens 10 is provided.
  • the diameter and depth of the substrate opening 21 may vary depending on the shape of the lens leg portion 230 provided to the light source lens 10. Specifically, the substrate opening 21 may have a diameter and depth sufficient to allow the lens leg portion 230 to be inserted into the substrate opening 21.
  • the number and provision positions of the substrate openings 21 may vary depending on the number and provision positions of the lens leg portions 230. Specifically, the substrate opening 21 may be provided at a position such that the center of the light exit surface of the light source 30 and the center of the light source receiving portion 300 of the light source lens 10 are aligned. Accordingly, when the lens leg portion 230 of the light source lens 10 is inserted into the substrate opening 21, the light source receiving portion 300 of the light source lens 10 and the light source 30 are aligned, and the light source 30 ) May be efficiently diffused through the light source lens 10.
  • the light source 30 mounted on the substrate 20 performs a function of emitting light.
  • the light source 30 may be a light emitting device.
  • the light source 30 is provided under the LED chip emitting light, the LED chip, and covers the LED chip and the pad electrically connecting the substrate 20 to the LED chip, and covers the LED chip. It may include a wavelength converter that converts the wavelength.
  • the light emitting diode chip included in the light source 30 may be a light emitting diode chip of a flip chip type or a light emitting diode chip of a lateral type or a vertical type. There is no limitation on the type or type of the light emitting diode chip included in the light source 30.
  • the light emitting diode chip included in the light source 30 may have, for example, a structure in which a light emitting stack is formed on a device substrate.
  • the device substrate may function as a growth substrate, and may be a sapphire substrate or may include a material such as SiC, Si, GaAs, GaN, ZnO, GaP, InP, Ge, Ga 2 O 3 .
  • the device substrate may be a patterned sapphire substrate (PSS) that is patterned and includes a plurality of protruding patterns on an upper surface.
  • the light emitting laminate provided on the device substrate may include a first semiconductor layer, an active layer, and a second semiconductor layer sequentially stacked.
  • the wavelength converter included in the light source 30 may receive light in the first wavelength band emitted from the light emitting diode chip and convert it into light in a second wavelength band different from the first wavelength band. Accordingly, the light source 30 may emit various types of light. For example, when a plurality of light sources 30 are included, red light, blue light, green light, etc. can be implemented by configuring different types of wavelength converters even if the light emitting diode chip emits light of one wavelength band. When the lights are combined, white light can be realized.
  • the wavelength converter may include a quantum dot or a phosphor to perform the above-described function.
  • Light emitted from the light source 30 is diffused through the light source lens 10 and irradiated out of the light source module 1000 as described above.
  • a reflective sheet 40 may be provided to reflect light returned to the light source module 1000 without being irradiated out of the light source module 1000 among the light emitted from the light source 30.
  • the reflective sheet 40 is provided on the substrate 20 to reflect incident light.
  • the reflective sheet 40 may include, for example, a material having a high reflectance so as to reflect light in a visible wavelength band.
  • the banshee sheet 40 may include a reflective sheet base layer and a reflective sheet coating layer to perform the above-described light reflecting function.
  • the reflective sheet base layer provided in the reflective sheet 40 is polyester resin, acrylic resin, polycarbonate resin, polyolefin resin, epoxy resin, polyvinyl chloride resin, acrylamide resin, polyethylene terephthalate resin, polyethylene resin, polypropylene resin. , An epoxy resin, a polyethylene naphthalate resin, or a mixed resin thereof, and may function as a base of the reflective sheet 40.
  • the reflective sheet coating layer provided on the reflective sheet 40 is provided on an upper surface of the reflective sheet substrate layer, that is, a surface not in contact with the substrate 20, and may include a polymer resin and thermally conductive particles.
  • the polymer resin provided in the reflective sheet coating layer is (meth)acrylate resin, unsaturated polyester resin, polyester (meth)acrylate resin, silicone urethane (meth)acrylate resin, silicone polyester (meth)acrylate resin. , Fluorine urethane (meth)acrylate resin, phenol resin, epoxy resin, urea formaldehyde resin, melamine formaldehyde resin, and mixtures thereof.
  • the thermally conductive particles provided in the reflective sheet coating layer include aluminum oxide (Al 2 O 3 ), magnesium oxide (MgO), potassium oxide (K 2 O), beryllium oxide (BeO), copper (Cu), graphite, and It may include one or more selected from the group consisting of graphene.
  • the particles including the reflective sheet coating layer may function as a heat sink that reflects light and removes heat generated from the light source 30.
  • the reflective sheet 40 may be fixed on the substrate 20 by the light source lens 10.
  • the shape of the reflection sheet 40 fixed by the light source lens can be confirmed by looking at FIG. 10 showing an enlarged view of the area A1 of FIG. 9.
  • the light source lens 10 is provided in the reflective sheet hole 40h formed by removing a part of the reflective sheet 40.
  • the reflective sheet hole 40h exposes at least a partial area of the substrate 20.
  • a substrate opening 21 coupled to the lens leg portion 230 so that the light source lens 10 may be provided in the reflective sheet hole 40h may also be provided inside the reflective sheet hole 40h.
  • the size of the reflective sheet hole 40h may vary depending on the size of the light source lens 10. For example, the diameter of the reflective sheet hole 40h may be smaller than the diameter of the first lens unit 100 of the light source lens 10. Accordingly, when the light source lens 10 is provided inside the reflective sheet hole 40h, the edge region of the light source lens 10 and a partial region of the reflective sheet 40 may overlap on a plane.
  • the reflective sheet 40 may be provided in contact with the inclined surface 212 of the side surface of the second lens unit of the light source lens 10. When the inclined surface 212 of the side of the second lens unit presses the reflective sheet 40 toward the substrate 20, the reflective sheet 40 may be fixed on the substrate 20.
  • the vertical surface 211 of the side surface of the second lens unit may not meet the reflective sheet 40.
  • the vertical surface 211 of the side surface of the second lens unit may be spaced apart from the reflective sheet 40 and provided above the reflective sheet 40.
  • the vertical surface 211 of the side surface of the second lens unit may overlap the reflective sheet 40. Since the second lens portion side vertical surface 211 provided perpendicular to the substrate 20 does not meet the reflection sheet 40, the reflection sheet 40 is wrinkled or bent while straddling the second lens portion side vertical surface 211 Can be prevented. Accordingly, the reflective sheet 40 may be provided flat on the flat substrate 20 without being wrinkled, and there is no fear that light reflected from the reflective sheet 40 is scattered or reflected in an unwanted direction.
  • the reflective sheet 40 may be stably fixed and the light reflection efficiency by the reflective sheet 40 may be improved.
  • the diameter of the first lens unit 100 is provided larger than the diameter of the reflective sheet hole 40h, the light exit surface of the first lens unit 100 is wider regardless of the diameter of the reflective sheet hole 40h. Is provided and thus the light diffusing effect can be excellent.
  • the height of the second lens side inclined surface 212 that is, the height H2 of the second lens side inclined surface It may be larger than the reflective sheet thickness T1. Accordingly, the reflective sheet 40 can be stably fixed without crossing the inclined surface 212 of the side surface of the second lens unit in a fixed state.
  • the vertical height H1 of the side surface of the second lens unit may be smaller than the height H2 of the inclined surface of the side surface of the second lens unit. Accordingly, the light source lens 10 may be provided to be slim while stably fixing the reflective sheet 40.
  • the reflective sheet thickness T1 may be about 100 ⁇ m to about 500 ⁇ m. When the reflective sheet thickness T1 is less than about 100 ⁇ m, there is a concern that light is not reflected from the reflective sheet 40 and passes through the reflective sheet 40. In addition, when the thickness of the reflective sheet T1 exceeds about 500 ⁇ m, there is a concern that the overall size of the light emitting module 1000 becomes too thick.
  • the height H2 of the inclined surface of the side surface of the second lens unit has a size greater than about 100 ⁇ m to about 500 ⁇ m, for example, about 110 ⁇ m to about 550 ⁇ m. Can have.
  • the light source lens 10 is provided inside the reflective sheet hole 40h, and the reflective sheet 40 is fixed by the inclined surface 212 of the side of the second lens portion of the light source lens 10 As a result, the reflective sheet 40 can be flatly fixed on the substrate 20 without fear of being bent or wrinkled. Accordingly, the light reflection efficiency by the reflection sheet 40 is high, and the light efficiency of the light source module 1000 is excellent.
  • the side portion of the second lens unit may have various shapes other than those described above.
  • 11A and 11B are cross-sectional views illustrating another form of area A1 of FIG. 9.
  • the second lens unit side surface 210 may include a plurality of inclined or vertical surfaces.
  • the second lens portion side portion 210 includes an upper vertical surface 211a of the second lens portion side portion, the second lens portion side portion inclined surface 212, and the second lens portion side portion lower vertical surface 211b. ) Can be included.
  • the reflective sheet 40 is in contact with the inclined surface 212 of the side surface of the second lens unit.
  • the lower vertical surface 211b of the side surface of the second lens unit is provided inside the reflection sheet hole 40h to be spaced apart from the reflection sheet 40. Accordingly, there is no fear that the reflective sheet 40 is wrinkled or bent by the lower vertical surface 211b of the side surface of the second lens unit.
  • the lower vertical surface 211b of the side surface of the second lens unit contacts the substrate 20 exposed by the reflective sheet hole 40h. Since the lower vertical surface 211b of the side surface of the second lens unit contacts the substrate 20, the light source lens and the substrate 20 may be in close contact, and all light emitted from the light source may enter the light source lens.
  • the second lens portion side portion 210 is a second lens portion side portion upper vertical surface 211a, the second lens portion side portion upper inclined surface 212a, and the second lens portion side portion lower inclined surface 212b. ), and a lower vertical surface 211b of a side surface of the second lens unit.
  • the reflective sheet 40 may be provided in a form that spans between the upper inclined surface 212a of the second side surface of the second lens unit and the lower inclined surface 212b of the second lens unit side.
  • the upper inclined surface 212a of the second side surface of the second lens unit and the lower inclined surface 212b of the second lens unit side may be fixed on the substrate 20 more stably by simultaneously fixing the reflective sheet 40.
  • the reflective sheet 40 does not span a vertical surface perpendicular to the substrate 20, there is no fear that the reflective sheet 40 is bent or wrinkled during the fixing process.
  • the upper inclined surface 212a of the side surface of the second lens unit and the lower inclined surface 212b of the side surface of the second lens unit may have different inclinations.
  • the size of the inclination angle formed by the upper inclined surface 212a of the second lens part side surface with the substrate 20 may be smaller than the size of the inclination angle formed by the lower inclined surface 212b of the second lens part side surface with the substrate 20.
  • the second lens unit side surface 210 may have a shape approximating a smooth curve as a whole.
  • the second lens unit side surface 210 may have various shapes in addition to those described above.
  • the second lens unit side surface 210 may include more inclined surfaces and vertical surfaces, and may have an inclined surface formed of a curved surface.
  • the shape of the side surface 210 of the second lens unit may be determined in consideration of the shape of the reflective sheet 40.
  • FIG. 12 is a cross-sectional view of a light source module according to an embodiment of the present invention.
  • the light source module 1000 includes a second lens portion side portion 210 formed only of an inclined surface, and the lens leg portion 230 has a step shape formed of two stages.
  • the second lens unit side surface 210 does not include a vertical surface, and may be entirely formed of the second lens unit side surface inclined surface 212.
  • the inclined surface 212 of the side of the second lens unit and the reflective sheet 40 may be provided to be spaced apart from each other.
  • the second lens unit side inclined surface 212 and the reflective sheet 40 may be provided in a form that does not overlap when viewed in a plan view. Therefore, in this case, the reflective sheet 40 and the inclined surface 212 of the side surface of the second lens unit do not contact each other.
  • the reflective sheet 40 falls from the substrate 20, the reflective sheet 40 may be prevented from being separated from the substrate 20 because it may be caught on the end of the inclined surface 212 of the side surface of the second lens unit.
  • the reflective sheet 40 can be prevented from being affected by the light source lens 10. Specifically, when the reflective sheet 40 is vulnerable to external force, the reflective sheet 40 may be damaged while the light source lens 10 presses the reflective sheet 40. Alternatively, when the reflective sheet coating layer included in the reflective sheet 40 is chemically highly reactive, the reflective sheet coating layer and the light source lens 10 meet, and the light source lens 10 may be chemically modified. However, as shown in the drawing, if the second lens unit side inclined surface 212 and the reflective sheet 40 are provided so that they do not meet, this concern can be prevented. In addition, since light reflected from the reflective sheet 40 is reduced from traveling to the optically opaque side surface portion 210 of the second lens unit, light efficiency may be improved.
  • the lens leg portion 230 may have a staircase shape consisting of two steps.
  • the lens leg portion 230 may be provided in a form that is completely inserted into the substrate opening 21.
  • a substrate binder 22 may be provided in the substrate opening 21.
  • the substrate binder 22 may be provided between the lens leg portion 230 and the substrate opening 21 to perform a function of fixing the lens leg portion 230 in the substrate opening 21.
  • the lens leg portion 230 since the lens leg portion 230 has two stages, the surface area where the lens leg portion 230 and the substrate binder 22 meet is large, so that the fixing effect may be improved.
  • the substrate binder 22 may be an adhesive resin material commonly used, such as epoxy resin or urethane resin.
  • the second lens unit side inclined surface 212 and the reflective sheet 40 are provided to be spaced apart, so that the reflective sheet 40 is damaged by the second lens unit side inclined surface 212, It is possible to prevent deformation of the inclined surface 212 of the side surface of the second lens unit by the reflective sheet 40.
  • the stepped lens leg portion 230 consisting of two stages, the light source lens 10 can be more stably fixed to the substrate 20.
  • the light source module may include a plurality of light sources and a plurality of light source lenses.
  • a light source module including a plurality of light sources and a plurality of light source lenses will be described.
  • FIG. 13 is a plan view of a light source module according to an embodiment of the present invention.
  • the light source module 1000 includes a plurality of light source lenses 10 and a plurality of light sources 30.
  • each light source lens 10 and light source 30 are provided in the reflective sheet hole 40h.
  • the light source lens 10, the light source 30, and the reflective sheet hole 40h correspond to each other one-to-one.
  • one light source lens 10 and one light source 30 are provided in one reflection sheet hole 40h.
  • the reflective sheet 40 may include a plurality of reflective sheet holes 40h spaced apart from each other.
  • the reflective sheet holes 40h may be spaced apart within the reflective sheet 40 and may be provided in a relatively even distribution. For example, the distance between each reflective sheet hole 40h may be the same. Accordingly, light emitted from the light source 30 and the light source lens 10 provided in the plurality of reflection sheet holes 40h may be evenly diffused and irradiated.
  • the reflective sheet holes 40h may have the same or different sizes.
  • light sources 30 having different outputs may be provided to reflective sheet holes 40h having different sizes, and light source lenses 10 having different sizes and shapes may be provided.
  • the size of the reflective sheet 40 may vary depending on the type and size of the display device in which the light source module 1000 is employed.
  • the number of light source lenses 10 and light sources 30 may also vary according to the type and size of the display device. For example, a relatively small number of light source lenses 10 and light sources 30 may be provided in a display device having a relatively small size.
  • a light source module including a plurality of light sources and a light source lens has been described.
  • the above-described light source module may be applied to a display device or a display module.
  • FIG. 14 is a perspective view of a display device employing a light source module according to an embodiment of the present invention
  • FIG. 15 is an exploded perspective view of a display module employing a light source module according to an embodiment of the present invention.
  • the display device 2000 may include a plurality of display modules DM.
  • a plurality of display modules DM may be arranged in a matrix form to form one multi-module display device.
  • Each of the display modules DM may include a display unit DP and an illumination unit LP.
  • the lighting unit LP includes the aforementioned light source module.
  • the display unit DP includes a plurality of pixels and may or may not transmit light emitted from the illumination unit LP.
  • An image may be output from the display device 2000 by the operation of the display unit DP.
  • Each or at least a portion of the plurality of display modules DM may be independently driven, or at least some of the display modules DM may be driven dependently by interlocking with the other display modules DM.
  • the plurality of display modules DM are driven in conjunction with each other, as illustrated, one image may be displayed.
  • all of the plurality of display modules DM are provided in the same size, but the present invention is not limited thereto, and at least one display module DM and the other display modules DM They can also be provided in different sizes.
  • at least one display module DM may have a different number of pixels from the other display modules DM, and a resolution accordingly may also have different values.
  • a multi-module display device may be manufactured by arranging display modules DM having different resolutions.
  • each display module DM can be examined in more detail.
  • the display module DM may include the display unit DP and the illumination unit LP provided at one side of the display unit DP.
  • the display unit DP may include an anisotropic liquid crystal layer that transmits or does not transmit light emitted from the illumination unit LP according to an applied electric field.
  • the display unit DP may include a thin film transistor TFT for controlling to apply or not apply an electric field to the liquid crystal layer, and may include a color filter for converting a wavelength of transmitted light into a specific wavelength. Light is evenly irradiated from the illumination unit LP including the light source module to the entire area of the display unit DP, and the display unit DP transmits light in some areas and does not transmit light in some areas, thereby realizing contrast. .
  • the lighting unit LP may include a light source module 1000, a diffusion sheet DFS, a prism sheet PRS, and a protection sheet PTS in order to evenly irradiate light to the entire area of the display unit DP.
  • the diffusion sheet DFS receives and scatters the light emitted from the light source module 1000 so that the light emitted from the light source module 1000 can be spread more evenly.
  • the prism sheet PRS may perform a function of improving luminance by refracting and condensing light emitted from the diffusion sheet DFS.
  • a plurality of prism sheets PRS may be provided, and a plurality of prism sheets PRS may be arranged in different directions.
  • the protective sheet PTS functions to protect the diffusion sheet DFS, the prism sheet PRS, and the light source module 1000 from external impacts and foreign substances.
  • a plurality of light sources provided to the light source module 1000 may be provided under the display unit DP by overlapping the display unit DP on a plane.
  • the light source module 1000 covers the light source to prevent local dimming from occurring in the image emitted from the display device 2000 by focusing the light emitted from the light source at the center of the light exit surface of the light source. It may include a light source lens.
  • the light source lens has a structure for diffusing light as described above, and accordingly, light emitted from the light source can be evenly diffused. Accordingly, the display device according to an embodiment of the present invention can minimize the occurrence of local dimming in an output image. In addition, since the light source lens stably fixes the reflective sheet provided to the light source module without damage, light may be reflected by the reflective sheet to advance toward the display unit DP. Accordingly, the display device according to the exemplary embodiment of the present invention has high structural stability and excellent light efficiency.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

Selon un mode de réalisation de la présente invention, une lentille de source de lumière comprend : une première partie de lentille ayant une surface de sortie de lumière convexe dans une première direction ; une seconde partie de lentille disposée sur le côté opposé de la surface de sortie de lumière de la première partie de lentille et formée d'un seul tenant avec la première partie de lentille ; et une partie de réception de source de lumière formée en retirant des parties des première et seconde parties de lentille et en recevant une source de lumière, la seconde partie de lentille comprenant : une partie inférieure de la seconde partie de lentille ; et une partie latérale de la seconde partie de lentille disposée adjacente à la partie inférieure de la seconde partie de lentille, la partie latérale de la seconde partie de lentille étant disposée de manière à avoir une surface inclinée formant un angle inférieur à 90 degrés par rapport à la partie inférieure de la seconde partie de lentille dans au moins une région partielle.
PCT/KR2020/008113 2019-06-25 2020-06-24 Lentille de source de lumière et module de source de lumière la comprenant WO2020262905A1 (fr)

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KR10-2019-0075628 2019-06-25
KR1020190075628A KR20210000478A (ko) 2019-06-25 2019-06-25 광원 렌즈 및 이를 포함하는 광원 모듈

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JP2011023176A (ja) * 2009-07-14 2011-02-03 Sharp Corp 照明装置、液晶表示装置及び素子基板の板取り方法
KR20150082394A (ko) * 2012-10-30 2015-07-15 서울반도체 주식회사 면 조명용 렌즈 및 발광 모듈
JP2017083692A (ja) * 2015-10-29 2017-05-18 船井電機株式会社 拡散レンズおよび表示装置
KR20170061457A (ko) * 2015-11-26 2017-06-05 몰렉스 엘엘씨 확산 렌즈 및 이를 포함하는 발광 모듈
KR20170098355A (ko) * 2016-02-19 2017-08-30 희성전자 주식회사 에지라이트형 디스플레이 장치용 렌즈 및 이를 포함하는 디스플레이 장치

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Publication number Priority date Publication date Assignee Title
JP2011023176A (ja) * 2009-07-14 2011-02-03 Sharp Corp 照明装置、液晶表示装置及び素子基板の板取り方法
KR20150082394A (ko) * 2012-10-30 2015-07-15 서울반도체 주식회사 면 조명용 렌즈 및 발광 모듈
JP2017083692A (ja) * 2015-10-29 2017-05-18 船井電機株式会社 拡散レンズおよび表示装置
KR20170061457A (ko) * 2015-11-26 2017-06-05 몰렉스 엘엘씨 확산 렌즈 및 이를 포함하는 발광 모듈
KR20170098355A (ko) * 2016-02-19 2017-08-30 희성전자 주식회사 에지라이트형 디스플레이 장치용 렌즈 및 이를 포함하는 디스플레이 장치

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