WO2019088457A1 - Lentille optique - Google Patents

Lentille optique Download PDF

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Publication number
WO2019088457A1
WO2019088457A1 PCT/KR2018/011627 KR2018011627W WO2019088457A1 WO 2019088457 A1 WO2019088457 A1 WO 2019088457A1 KR 2018011627 W KR2018011627 W KR 2018011627W WO 2019088457 A1 WO2019088457 A1 WO 2019088457A1
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WO
WIPO (PCT)
Prior art keywords
curved surface
light
center
curved
optical axis
Prior art date
Application number
PCT/KR2018/011627
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English (en)
Korean (ko)
Inventor
기호경
우지훈
정재유
Original Assignee
주식회사 에이치엘옵틱스
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 에이치엘옵틱스 filed Critical 주식회사 에이치엘옵틱스
Publication of WO2019088457A1 publication Critical patent/WO2019088457A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source

Definitions

  • the embodiment relates to an optical lens for changing the optical path. More particularly, the present invention relates to an optical lens for use in a backlight unit, which changes a light path by forming a plurality of curved surfaces on an outgoing surface on which light is emitted.
  • LCD liquid crystal display
  • the backlight unit is provided below the liquid crystal display panel to provide light to the liquid crystal display panel.
  • the backlight unit may include a lamp, a light guide plate, a reflective sheet, an optical sheet, and the like.
  • the lamp has a relatively low calorific value and generates white light which is close to natural light, and has a long lifespan, a cold cathode fluorescent tube type lamp, an LED type using a light emitting diode (hereinafter referred to as LED) Use a lamp.
  • a cold cathode fluorescent tube type lamp an LED type using a light emitting diode (hereinafter referred to as LED) Use a lamp.
  • LED light emitting diode
  • the LED lamp has a plurality of LEDs for generating light, and the LED lamp has a light distribution in the form of a point light source.
  • the point light source of such an LED lamp does not cover a large area per point light source, and the amount of luminance that can be generated per light source is also limited.
  • the backlight unit includes hundreds of LED light sources. In this case, the number of the light sources increases, and the number and area of the PCB substrates used for the light sources increase, resulting in a problem that the manufacturing cost of the backlight increases sharply.
  • the embodiment provides an optical lens for changing the path of light irradiated from a light source so that a small number of light sources can be used.
  • an optical lens capable of changing the optical path of light having directivity in a specific direction by using a plurality of curved surfaces to secure light diffusibility.
  • an optical lens for changing a path of light emitted from a light source, the optical lens comprising: an emitting surface convexly formed upward; Lower surface; And an incident surface formed concavely in the direction of the exit surface from the lower surface, wherein the exit surface has a plane having a predetermined radius (R) with respect to the optical axis; A first curved surface extending outwardly from the plane and having a first curvature; A second curved surface extending outwardly from the first curved surface and having a second curvature; And a third curved surface extending outwardly from the second curved surface and having a third curvature.
  • R predetermined radius
  • the height H1 of the plane may be lower than the height H2 of the third curved surface with respect to the lower surface.
  • a line L connecting the center C1 of the first curved surface, the center C2 of the second curved surface and the center C3 of the third curved surface may be arranged parallel to the plane or the lower surface have.
  • the first curved surface, the second curved surface, and the third curved surface may be formed to have the same radius.
  • the distance D2 from the optical axis to the center C2 of the second curved surface may be 1.25 when the distance D1 from the optical axis to the center C1 of the first curved surface is 1.
  • the distance D1 from the optical axis to the center C1 of the first curved surface is 1, the distance D3 from the optical axis to the center C3 of the third curved surface may be 1.5.
  • the radius of the third curved surface and the distance D3 from the optical axis to the center C3 of the third curved surface may be the same.
  • the radius R of the plane may be 0.4.
  • the optical lens may further include a protrusion disposed between the emission surface and the lower surface and protruding outward from an edge of the emission surface, wherein the protrusion has a radial direction from an edge of the emission surface with respect to an optical axis (C) Side surfaces spaced apart from each other by a predetermined distance d; And a connection surface disposed between the side surface and the emission surface, and the side surface may be inclined outwardly at a predetermined angle (?) From the bottom surface.
  • a protrusion disposed between the emission surface and the lower surface and protruding outward from an edge of the emission surface, wherein the protrusion has a radial direction from an edge of the emission surface with respect to an optical axis (C) Side surfaces spaced apart from each other by a predetermined distance d; And a connection surface disposed between the side surface and the emission surface, and the side surface may be inclined outwardly at a predetermined angle (?) From the bottom surface.
  • part of the light incident through the incident surface may be reflected by the first curved surface to one side of the third curved surface and the side surface of the protruded portion.
  • part of the light incident on the second curved surface through the incident surface may be reflected by the second curved surface to the side surface of the projection.
  • connection surface of the protrusion may be disposed on the line L.
  • the plane may be disposed parallel to the lower surface.
  • the optical lens according to the embodiment can form a plurality of curved surfaces on the exit surface to change the optical path of a part of the light emitted from the light source to improve the light diffusibility.
  • the light diffusing property can be improved by refracting and dispersing light using a plurality of curved surfaces.
  • FIG. 1 is a perspective view showing an optical lens according to an embodiment
  • FIG. 2 is a plan view showing an optical lens according to an embodiment
  • FIG. 3 is a side view showing an optical lens according to an embodiment
  • FIG. 4 is a bottom view showing an optical lens according to an embodiment
  • FIG. 5 is a cross-sectional perspective view showing an optical lens according to an embodiment
  • FIG. 6 is a cross-sectional view showing an optical lens according to the embodiment
  • FIG. 7 is a view showing an optical path of the optical lens according to the embodiment.
  • FIG. 8 is a view showing an optical path by a plane in an outgoing plane of an optical lens according to the embodiment
  • FIG. 9 is a view showing an optical path by the first curved surface of the exit surface of the optical lens according to the embodiment.
  • FIG. 10 is a view showing an optical path by the second curved surface of the exit surface of the optical lens according to the embodiment
  • FIG. 11 is a view showing an optical path by the third curved surface of the exit surface of the optical lens according to the embodiment
  • FIG. 13 is a view showing a light source for irradiating light onto an incident surface of an optical lens according to the embodiment.
  • the terms including ordinal, such as second, first, etc. may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.
  • the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component.
  • / or < / RTI &gt includes any combination of a plurality of related listed items or any of a plurality of related listed items.
  • the upper or lower (lower) (on or under) all include that the two components are in direct contact with each other or that one or more other components are indirectly formed between the two components. Also, when expressed as 'on or under', it may include not only an upward direction but also a downward direction based on one component.
  • FIG. 2 is a plan view showing an optical lens according to an embodiment
  • FIG. 3 is a side view showing an optical lens according to an embodiment
  • FIG. 4 is a cross-
  • FIG. 5 is a cross-sectional perspective view showing an optical lens according to the embodiment
  • FIG. 6 is a cross-sectional view showing an optical lens according to the embodiment.
  • the optical lens 1 may include an exit surface 100, a lower surface 200, a protrusion 300, and an incident surface 400.
  • the optical lens 1 can change the path of the light emitted from the light source 10. As shown in FIG. 7, the optical lens 1 diffuses the light emitted from the light source 10 by using a plurality of curved surfaces formed on the emission surface 100. Accordingly, the optical lens 1 may be referred to as a light diffusion lens.
  • the optical lens 1 may be formed using a material of polycarbonate or polymethymethylacrylate.
  • the refractive index of the polycarbonate is 1.58, and the refractive index of the polymethylacrylate is 1.49.
  • the emitting surface 100 may be formed convex toward the upper side. A part of the light incident into the optical lens 1 through the incident surface 400 is emitted through the exit surface 100.
  • the terms 'upper side' and 'lower side' are relative expressions. If there is no definition below, the direction from the lower surface 200 to the emission surface 100 is defined as the upper side (upper side) 100) to the lower surface 200 is defined as the lower side (lower side).
  • the emitting surface 100 may be formed to be convex in the optical axis direction (z direction) with the optical axis C as the center. Accordingly, a part of the light incident through the incident surface 400 can be refracted by the shape of the emitting surface 100 and emitted to the outside.
  • the optical axis C is the center of the light irradiated by the light source 10, and may coincide with the center of the optical lens 1.
  • the optical lens 1 improves the diffusibility of the light through the shape of the exit surface 100, thereby obtaining a uniform light distribution as a whole.
  • an exit surface 100 includes a plane 110 having a predetermined radius R with respect to an optical axis C, a first curved portion 110 extending outward from the plane 110, A second curved surface 130 extending outward from the first curved surface 120 and having a second curvature and a third curved surface 140 extending outward from the second curved surface 130 and having a third curvature, ).
  • the outer side may be a direction opposite to the direction toward the optical axis C with respect to the radial direction (x direction).
  • the plane 110, the first curved surface 120, the second curved surface 130, and the third curved surface 140 may be rotationally symmetric with respect to the optical axis C.
  • the plane 110 may be disposed on the optical axis C to change the optical path of the light incident through the incident surface 400. Accordingly, the plane 110 can diffuse the light incident through the incident surface 400.
  • the light emitted from the light source 10 and passing through the incident surface 400 is incident on the plane 110 at a predetermined angle. Accordingly, the light incident on the plane 110 can be refracted and diffused at a predetermined angle.
  • the plane 110 may be formed in a planar shape. As shown in FIG. 2, the plane 110 may be formed to have a predetermined radius R with respect to the optical axis C. The plane 110 may be disposed parallel to the lower surface 200.
  • the height H1 of the flat surface 110 may be lower than the height H2 of the third curved surface 140 with respect to the lower surface 200.
  • the amount of refraction of the light refracted through the third curved surface 140 is larger than the amount of light refracted through the plane 110 with respect to the optical axis C.
  • the radius R of the plane 110 may be 0.4.
  • the first curved surface 120 may be formed to extend outward from the plane 110. At this time, the first curved surface 120 may be formed with a predetermined first curvature 1 / R1. For example, the first curved surface 120 may be formed in an arc shape with respect to a vertical cross section. Accordingly, the first curved surface 120 can be formed with a predetermined radius R1 with respect to the center C1.
  • the first curved surface 120 may be formed in a ring shape on a plane.
  • the first curved surface 120 is formed with the first curvature 1 / R1, a part of the light incident on the first curved surface 120 can be refracted out and emitted.
  • the other part of the light incident on the first curved surface 120 may be reflected by the first curved surface 120 to one side of the third curved surface 130 and the side surface 310 of the protruding part 300.
  • a portion of the third curved surface 130 and a part of the light incident on the side surface 310 of the protrusion 300 can be emitted to the outside or reflected to the lower surface 200 by the first curved surface 120 .
  • the optical lens 1 can improve the light diffusing property through the first curved surface 120.
  • the second curved surface 130 may be formed to extend outward from the first curved surface 120. At this time, the second curved surface 130 may be formed with a predetermined second curvature 1 / R2. For example, the second curved surface 130 may be formed in an arc shape with respect to a vertical cross section. Accordingly, the second curved surface 130 may be formed with a predetermined radius R2 based on the center C2.
  • the second curved surface 130 may be formed in a ring shape on a plane.
  • the second curved surface 130 is formed with the second curvature 1 / R2
  • a part of the light incident on the second curved surface 130 can be refracted out and emitted.
  • Another portion of the light incident on the second curved surface 130 may be reflected by the second curved surface 130 to the side surface 310 of the protruded portion 300.
  • a part of the light incident on one side of the third curved surface 130 and the side surface 310 of the protrusion 300 can be emitted to the outside by the second curved surface 130. Since the side surface 310 is inclined at a predetermined angle?, The light reflected through the second curved surface 130 can be emitted to the outside through the side surface 310.
  • the optical lens 1 can improve the light diffusing property through the second curved surface 130.
  • the distance D1 from the optical axis to the center C1 of the first curved surface 120 is 1
  • the distance D2 from the optical axis C to the center C2 of the second curved surface 130 is 1.25.
  • the third curved surface 140 may be formed to extend outward from the second curved surface 130. At this time, the third curved surface 140 may be formed with a predetermined third curvature (1 / R3).
  • the third curved surface 140 may be formed in an arc shape with respect to the vertical cross section. Accordingly, the third curved surface 140 may be formed with a predetermined radius R3 with respect to the center C3.
  • the third curved surface 140 may be formed in a ring shape on a plane.
  • the third curved surface 140 is formed with the second curvature 1 / R3, the light incident on the third curved surface 140 can be refracted out and emitted.
  • the optical lens 1 can improve the light diffusing property through the third curved surface 140.
  • the distance D1 from the optical axis to the center C1 of the first curved surface 120 is 1, the distance D3 from the optical axis C to the center C3 of the third curved surface 140 is 1.5.
  • the height H2 of the third curved surface 140 may be greater than the height H1 of the flat surface 110 with respect to the lower surface 200.
  • the distance D3 from the radius R3 of the third curved surface 140 to the center C3 of the third curved surface 140 from the optical axis C may be the same.
  • An imaginary line L connecting the center C1 of the first curved surface 120, the center C2 of the second curved surface 130 and the center C3 of the third curved surface 140, Or may be disposed parallel to the lower surface 200.
  • the radii R1, R2, and R3 of the first curved surface 120, the second curved surface 130, and the third curved surface 140 may be formed to have the same radius.
  • the lower surface 200 may be provided in a plane. As shown in FIG. 4, the lower surface 200 may be formed in a circular shape having a predetermined radius. Here, although the lower surface 200 is provided as a plane, it is not limited thereto.
  • the lower surface 200 may have a flat surface extending from the edge to a certain length in the center direction, and a lower convex surface (not shown) may be formed from the end of the flat surface toward the center.
  • the lower convex surface may be convex downward.
  • the lower surface 200 may have a curvature of zero for a predetermined length from the edge to the center, but may have a shape in which the curvature increases from the predetermined length to the center, then decreases again.
  • the light emitted from the light source 10 to the lower side can be totally reflected to the upper side in the case of the lower surface 200 having the lower convex surface as compared with the lower surface composed of only the plane.
  • the plane of the lower surface 200 is disposed outside the lower convex surface so that the light is totally reflected by the lower convex surface.
  • the protrusion 300 may be disposed between the emitting surface 100 and the lower surface 200. As shown in FIG. 2, the protrusion 300 may protrude outwardly to have a predetermined distance d from the outer circumference of the third curved surface 140.
  • the protrusion 300 may include a side surface 310 and a connection surface 320.
  • the side surface 310 may be spaced apart from the outer circumference of the third curved surface 140 by a predetermined distance d in the radial direction (x direction) with respect to the optical axis C. Accordingly, in the case of the light that is emitted through the side surface 310 among the light that moves along the inside of the optical lens 1, the light advances by at least the distance d away from the light emitted through the emitting surface 100, . Therefore, the optical lens 1 can improve the diffusibility of light through the protrusion 300. At this time, the light emitted through the side surface 310 can be refracted by the refractive index difference between the optical lens 1 and the outside.
  • the side surface 310 may be formed to be inclined outwardly at a predetermined angle (?) At the lower surface 200. Accordingly, the light diffusing property of the optical lens 1 can be improved.
  • a part of the light incident through the incident surface 400 is refracted to the light irradiation direction (upper side) by the side surface 310 inclined at a predetermined angle & tilde & The diffusibility can be improved.
  • the light incident through the incident surface 400 may be light emitted from the side light emitting surface 12 of the light source 10.
  • the connecting surface 320 may be disposed between the emitting surface 100 and the side surface 310.
  • the connecting surface 320 may be formed to extend from the outer circumference of the third curved surface 140 to the upper edge of the side surface 310.
  • the distance d may be adjusted according to the size of the connecting surface 320 as viewed from above.
  • connection surface 320 may be disposed at a predetermined angle with the side surface 310, the light emitted from the side surface 310 in the case of light emitted from the connection surface 320, May occur. Accordingly, the optical diffusivity of the optical lens 1 can be further improved.
  • the area where the side surface 310 and the connection surface 320 meet can be rounded to a predetermined curvature. Accordingly, the optical diffusivity of the optical lens 1 is further improved, and uniformity can be ensured by the light emitted from the region.
  • the connecting surface 320 may be disposed on the line L. As shown in FIG. 6, the connecting surface 320 may be disposed on the line L. As shown in FIG.
  • the incident surface 400 may be concave in the direction of the emitting surface 100 from the center of the lower surface 200. That is, the incident surface 400 may be provided with a groove whose vertical cross section is semi-elliptical, parabolic, or semi-rugby-ball shaped.
  • an air layer may be disposed between the light source 10 and the incident surface 400. Therefore, in the case of the light emitted from the light source 10 to the air layer, the refractive index can be refracted at the incident surface 400 of the optical lens 1 having a different refractive index.
  • the optical lens 1 may be formed with an incidence aperture E.
  • the entrance E may be formed in a circular shape at a central portion of the lower surface 200, but is not limited thereto.
  • the light source 10 may be disposed at the center of the incident aperture E.
  • the incident surface 400 is a surface portion where light emitted from the light source 10 located at the entrance E enters into the optical lens 1. [ The light incident on the incident surface 400 through the incident surface 400 may be refracted through the exit surface 100 and the protrusion 300 and may be emitted to the outside.
  • FIG. 13 is a view showing a light source for irradiating light onto an incident surface of an optical lens according to the embodiment.
  • the light source 10 for emitting light toward the incident surface 400 may include an upper light emitting surface 11 and four side light emitting surfaces 12. Accordingly, the light source 10 can realize five-sided light emission.
  • the light source 10 may be disposed on a substrate.
  • the light emitted from the upper light emitting surface 11 of the light source 10 is irradiated in the optical axis direction (z direction), and the light emitted from the side light emitting surface 12 may be radiated in the radial direction (x direction) .
  • the light source 10 may be an LED.
  • the LED may be coated with a yellow phosphor.
  • the present invention relates to an optical lens and a method of manufacturing the same and a method of manufacturing the same.
  • C optical axis

Abstract

La présente invention concerne, selon un mode de réalisation, une lentille optique permettant de changer un trajet de lumière émise à partir d'une source de lumière, la lentille optique comprenant : une surface de sortie formée de façon convexe vers le haut ; une surface inférieure ; et une surface incidente formée de manière concave dans la direction de la surface de sortie à partir de la surface inférieure, la surface de sortie comprenant : un plan comportant un rayon prédéfini (R) par rapport à un axe optique ; une première surface incurvée s'étendant vers l'extérieur à partir du plan et comportant une première courbure ; une deuxième surface incurvée s'étendant vers l'extérieur à partir de la première surface incurvée et comportant une deuxième courbure ; et une troisième surface incurvée s'étendant vers l'extérieur à partir de la deuxième surface incurvée et comportant une troisième courbure. Par conséquent, la lentille optique peut améliorer la diffusivité de la lumière par formation d'une pluralité de surfaces incurvées et de plans sur la surface de sortie pour modifier un trajet optique d'une partie de la lumière émise par la source de lumière.
PCT/KR2018/011627 2017-10-31 2018-10-01 Lentille optique WO2019088457A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2017-0143604 2017-10-31
KR1020170143604A KR101907064B1 (ko) 2017-10-31 2017-10-31 광학렌즈

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WO2019088457A1 true WO2019088457A1 (fr) 2019-05-09

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PCT/KR2018/011627 WO2019088457A1 (fr) 2017-10-31 2018-10-01 Lentille optique

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WO (1) WO2019088457A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210109996A (ko) * 2020-02-28 2021-09-07 몰렉스 엘엘씨 광학 렌즈 및 이를 포함하는 발광 모듈

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100900400B1 (ko) * 2007-09-18 2009-06-02 서울반도체 주식회사 비구면 렌즈를 갖는 발광소자 및 그것을 포함하는 백라이트유닛
KR101119193B1 (ko) * 2004-12-30 2012-03-22 삼성전자주식회사 광원 유닛 및 이를 갖는 액정 표시 장치
KR20130107849A (ko) * 2012-03-23 2013-10-02 서울반도체 주식회사 광 확산 렌즈 및 이를 포함하는 발광유닛
JP2015149133A (ja) * 2014-02-05 2015-08-20 パナソニックＩｐマネジメント株式会社 照明装置
JP2016127030A (ja) * 2015-01-08 2016-07-11 エルジー イノテック カンパニー リミテッド 光学レンズ、発光モジュールおよびこれを具備したライトユニット

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101119193B1 (ko) * 2004-12-30 2012-03-22 삼성전자주식회사 광원 유닛 및 이를 갖는 액정 표시 장치
KR100900400B1 (ko) * 2007-09-18 2009-06-02 서울반도체 주식회사 비구면 렌즈를 갖는 발광소자 및 그것을 포함하는 백라이트유닛
KR20130107849A (ko) * 2012-03-23 2013-10-02 서울반도체 주식회사 광 확산 렌즈 및 이를 포함하는 발광유닛
JP2015149133A (ja) * 2014-02-05 2015-08-20 パナソニックＩｐマネジメント株式会社 照明装置
JP2016127030A (ja) * 2015-01-08 2016-07-11 エルジー イノテック カンパニー リミテッド 光学レンズ、発光モジュールおよびこれを具備したライトユニット

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