WO2018094879A1 - 一种椭球面广角背光源透镜 - Google Patents

一种椭球面广角背光源透镜 Download PDF

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Publication number
WO2018094879A1
WO2018094879A1 PCT/CN2017/073761 CN2017073761W WO2018094879A1 WO 2018094879 A1 WO2018094879 A1 WO 2018094879A1 CN 2017073761 W CN2017073761 W CN 2017073761W WO 2018094879 A1 WO2018094879 A1 WO 2018094879A1
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WIPO (PCT)
Prior art keywords
light
ellipsoidal
wide
mounting hole
reflective bottom
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PCT/CN2017/073761
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English (en)
French (fr)
Inventor
张志才
Original Assignee
深圳市明智塑胶制品有限公司
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Priority claimed from CN201621258811.2U external-priority patent/CN206321913U/zh
Priority claimed from CN201621258812.7U external-priority patent/CN206504274U/zh
Application filed by 深圳市明智塑胶制品有限公司 filed Critical 深圳市明智塑胶制品有限公司
Priority to KR1020197010546A priority Critical patent/KR102264373B1/ko
Priority to JP2019540477A priority patent/JP6768972B2/ja
Publication of WO2018094879A1 publication Critical patent/WO2018094879A1/zh
Priority to US16/377,264 priority patent/US10585309B2/en

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Classifications

    • 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
    • G02B19/0014—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only at least one surface having optical power
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • 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
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133526—Lenses, e.g. microlenses or Fresnel lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Definitions

  • the present invention relates to the field of lens technologies, and in particular, to an ellipsoidal wide-angle backlight lens.
  • Liquid crystal televisions generally use a direct-lit LED backlight as a light source behind the liquid crystal panel.
  • the direct-lit LED backlight is usually composed of an LED lamp and a lens.
  • the lens can evenly illuminate the LED lamp to achieve uniform brightness of the liquid crystal panel, further improving the picture quality of the LCD TV.
  • the illumination angle of the lens is small, so that the illumination area of the LED lamp is small, and thus the illumination area of the direct-lit LED backlight to the liquid crystal panel is small.
  • LCD TV manufacturers usually adopt a method of increasing the number of LED lamps. However, this method not only increases the production cost, but also increases the power consumption of the LCD TV.
  • the ratio determines the structural shape of the ellipsoid. .
  • the technical problem to be solved by the present invention is to provide an ellipsoidal wide-angle backlight lens for improving the illumination area of a liquid crystal panel by a direct-lit LED backlight, and reducing the number of LED lamps and liquid crystal according to the above-mentioned deficiencies of the prior art.
  • the power consumption of the TV is to provide an ellipsoidal wide-angle backlight lens for improving the illumination area of a liquid crystal panel by a direct-lit LED backlight, and reducing the number of LED lamps and liquid crystal according to the above-mentioned deficiencies of the prior art.
  • An ellipsoidal wide-angle backlight lens includes a lens body, the lens body is provided with a light-emitting top surface, a light-emitting side surface, and a reflective bottom surface, and an upper edge and a lower edge of the light-emitting side surface respectively correspond to the light-emitting top surface
  • the outer edge of the reflective bottom surface is connected to the outer edge of the reflective bottom surface
  • the light-receiving bottom surface is provided with a light source mounting hole
  • the inner wall of the light source mounting hole is a light-incident surface
  • the top of the light source mounting hole is provided with a downwardly convex light-incident bump; the light-emitting top surface, the light-incident surface, and the surface of the light-incident bump are all ellipsoidal structures.
  • the light emitting side surface is a cylindrical surface.
  • the light emitting side surface and the reflective bottom surface are provided with a fire pattern road.
  • the reflective bottom surface is provided with a mounting post and a mounting hole.
  • FIG. 1 is a perspective view of an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of the upper plane ZOY of FIG. 1.
  • FIG. 3 is a cross-sectional view of the upper plane ZOX of FIG. 1.
  • FIG. 4 is an optical path diagram on a plane ZOY using germanium according to an embodiment of the present invention.
  • FIG. 5 is an optical path diagram on a plane ZOX using germanium in accordance with an embodiment of the present invention.
  • an embodiment of the present invention provides an ellipsoidal wide-angle backlight lens, including a lens body, wherein the lens body is provided with a light-emitting top surface 10, a light-emitting side surface 20, and a reflective bottom surface 30.
  • the upper edge and the lower edge of the light-emitting side surface 20 are respectively connected to the outer edge of the light-emitting top surface 10 and the outer edge of the light-reflecting bottom surface 30.
  • the light-reflecting bottom surface 30 is centrally provided with a light source mounting hole, and the light source mounting hole is
  • the inner wall is the light incident surface 40, and the lower edge of the light incident surface 40 is connected to the inner edge of the reflective bottom surface 30;
  • the top center of the light source mounting hole is provided with a downwardly convex light incident bump 41;
  • the surfaces of the light-emitting top surface 10, the light-incident surface 40, and the light-incident bump 41 are all ellipsoidal structures.
  • the X, Y, and ⁇ axes are set at the origin 0 of the Cartesian coordinate system with the center of the reflective bottom surface 30; the equations of the light exit top surface 10, the light incident surface 40, and the surface of the light incident bump 41 They are:
  • :c 3 a 3 , any two or three are equal.
  • the light passes through the light-emitting top surface 10, the light-incident surface 40, and the light entering
  • the angle of refraction of the surface of the bump 41 is uniform, and the light is uniformly distributed after being emitted from the lens body.
  • the light exiting side 20 is a cylindrical surface.
  • the light exiting side 20 and the reflective bottom surface 30 are provided with a fire pattern road.
  • the reflective bottom surface 30 is provided with a mounting post 31 and a mounting hole 32.
  • the mounting post 31 and the mounting hole 32 are symmetrically arranged with the X axis as the axis of symmetry.
  • the lens body is mounted on the PCB through the mounting post 31 and the mounting hole 32.
  • the lens body A is mounted on the PCB board B, and the LED lamp C is mounted on the center of the light source mounting hole of the lens body A, and the light is emitted from the LED lamp C through the lens. Refraction and reflection of body A And diverging from the lens body A.
  • the light incident bump 41 is disposed, and the light passing through the center of the lens body is diverged by refraction to prevent the luminance of the center of the lens body from being excessively large.
  • the ellipsoidal structure can refract light entering and exiting the lens body, so that the angle of light emission is larger, and thus the illumination area of the LED backlight to the liquid crystal panel reduces the amount of LED light used and the power consumption of the liquid crystal television.
  • the fire pattern path is used to treat stray light, allowing the lens to project a uniform spot.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Planar Illumination Modules (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Liquid Crystal (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

一种椭球面广角背光源透镜，包括透镜体（A），透镜体（A）设置有出光顶面（10）、出光侧面（20）、以及反光底面（30），出光侧面（20）的上边缘和下边缘分别与出光顶面（10）的外边缘、反光底面（30）的外边缘连接，反光底面（30）中心设置有光源安装孔，光源安装孔的内壁为入光面（40），入光面（40）的下边缘与反光底面（30）的内边缘连接；光源安装孔的顶部中心设置有向下凸起的入光凸点（41）；出光顶面（10）、入光面（40）以及入光凸点（41）的表面均为椭球面结构。经过透镜体（A）中心的光线通过入光凸点（41）折射而发散开，避免透镜体（A）中心的辉度过大；椭球面结构能使进入和射出透镜体（A）的光线进行折射，使光线发射的角度更大，进而提高LED背光源对液晶面板的照射面积，减少LED灯的使用数量和液晶电视的耗电量。

Description

一种椭球面广角背光源透镜 技术领域
[0001] 本发明涉及透镜技术领域， 尤其涉及一种椭球面广角背光源透镜。
背景技术
[0002] 液晶电视通常采用直下式 LED背光源作为液晶面板后方的发光源。 直下式 LED 背光源通常由 LED灯和透镜组合而成， 透镜可以使 LED灯的光线均匀照射， 使液 晶面板实现均匀辉度， 进一步提高液晶电视的画质。
[0003] 现有技术中， 透镜的发光角度小， 使 LED灯的照射面积较少， 进而导致直下式 LED背光源对液晶面板的照射面积较少。 液晶电视生产商为了提高 LED背光源对 液晶面板的照射面积， 通常采用增加 LED灯数量的方法。 但这一方法不仅提高了 生产成本， 也增加了液晶电视的耗电量。
[0004] 椭球面在笛卡尔坐标系下， 方程式为 x2/a2+y2/b2+z2/c2=l， 其中 a,b,c为任意正常 数， a、 b、 c的比例决定椭球面的结构形状。 。
技术问题
问题的解决方案
技术解决方案
[0005] 本发明要解决的技术问题是根据上述现有技术的不足， 提供一种椭球面广角背 光源透镜， 用以提高直下式 LED背光源对液晶面板的照射面积， 降低 LED灯数量 和液晶电视的耗电量。
[0006] 本发明的技术方案如下：
[0007] 一种椭球面广角背光源透镜， 包括透镜体， 所述透镜体设置有出光顶面、 出光 侧面、 以及反光底面， 所述出光侧面的上边缘和下边缘分别与所述出光顶面的 外边缘、 反光底面的外边缘连接， 所述反光底面中心设置有光源安装孔， 所述 光源安装孔的内壁为入光面， 所述入光面的下边缘与所述反光底面的内边缘连 接； 所述光源安装孔的顶部中心设置有向下凸起的入光凸点； 所述出光顶面、 入光面以及入光凸点的表面均为椭球面结构。 [0008] 进一步地， 以所述反光底面的中心为笛卡尔坐标系的原点 0， 设置 X、 Y、 Ζ轴
； 所述出光顶面、 入光面以及以及入光凸点的表面的方程式分别为：
[0009] X !2/a !2+y x 2lb x 2+z x 2lc x 2=\，
[0010] x2 2/a22+y 22/b2 2+z2 2/c22=l，
[0011] x 3 2/a 3 2+y 3 2b 3 2+z 3 2/c 3 2= 1；
[0012] 其中， a i >b i >c i , c2>b2>a2， b3>c3>a3;
[0013] 进一步地， a! ^c p 。2:152: &2和153 ^3: &3中， 任意两者或三者相等。
[0014] 进一步地， a！ >a2>a3, b！ >b 2>b 3, c！ > c 2> c 3。
[0015] 进一步地， 所述出光侧面为圆柱面。
[0016] 进一步地， 所述出光侧面和反光底面设置有火花纹路。
[0017] 进一步地， 所述反光底面设置有安装柱脚和安装孔。
发明的有益效果
有益效果
[0018] (1) 设置有入光凸点， 通过折射将经过透镜体中心的光线发散幵， 避免透镜 体中心的辉度过大； （2) 椭球面结构能使进入和射出透镜体的光线进行折射， 使光线发射的角度更大， 进而 LED背光源对液晶面板的照射面积， 减少 LED灯的 使用数量和液晶电视的耗电量； （3) 火花纹路用于处理杂散光吋， 让透镜体投 射出均匀的光斑。
对附图的简要说明
附图说明
[0019] 图 1是本发明实施例的透视图。
[0020] 图 2是图 1上平面 ZOY上的剖视图。
[0021] 图 3是图 1上平面 ZOX上的剖视图。
[0022] 图 4是本发明实施例使用吋的平面 ZOY上的光路图。
[0023] 图 5是本发明实施例使用吋的平面 ZOX上的光路图。
[0024] 附图标记
[0025] 10、 出光顶面， 20、 出光侧面， 30、 反光底面， 31、 安装柱脚，
[0026] 32、 安装孔， 40、 入光面， 41、 入光凸点； [0027] A、 透镜体， B、 PCB板， C、 LED灯。
本发明的实施方式
[0028] 为使本发明的目的、 技术方案和优点更加清楚， 下面将结合附图对本发明作进 一步地详细描述。
[0029] 如图 1-3所示， 本发明提供的实施例， 一种椭球面广角背光源透镜， 包括透镜 体， 所述透镜体设置有出光顶面 10、 出光侧面 20、 以及反光底面 30， 所述出光 侧面 20的上边缘和下边缘分别与所述出光顶面 10的外边缘、 反光底面 30的外边 缘连接， 所述反光底面 30中心设置有光源安装孔， 所述光源安装孔的内壁为入 光面 40， 所述入光面 40的下边缘与所述反光底面 30的内边缘连接； 所述光源安 装孔的顶部中心设置有向下凸起的入光凸点 41; 所述出光顶面 10、 入光面 40以 及入光凸点 41的表面均为椭球面结构。
[0030] 以所述反光底面 30的中心为笛卡尔坐标系的原点 0， 设置 X、 Y、 Ζ轴； 所述出 光顶面 10、 入光面 40以及以及入光凸点 41的表面的方程式分别为：
[0031 ] X l 2/a !2+y x 2lb x 2+z x 2lc x 2= 1，
[0032] x 2 2/a 2 2+y 2 2/b 2 2+z 2 2/c 2 2= 1，
[0033] x 3 2/a 3 2+y 3 2/b 3 2+z 3 2/c 3 2= 1。
[0034] 其中： a b c !, c2>b2>a2, b3>c3>a3;
[0035] a J >a2>a3, b； >b 2>b 3, c ! > c 2> c 3。
[0036]
Figure imgf000005_0001
:c3: a3中， 任意两者或三者相等。 本实施例中， 优 选&1 :151:(：1=(：2 :152 : & 2=153 ^3: &3， 使光线穿过出光顶面 10、 入光面 40以及入 光凸点 41的表面的折射角度一致， 光线从透镜体射出后均匀分布。
[0037] 所述出光侧面 20为圆柱面。 所述出光侧面 20和反光底面 30设置有火花纹路。
[0038] 所述反光底面 30设置有安装柱脚 31和安装孔 32。 其中， 安装柱脚 31和安装孔 32 以 X轴为对称轴对称设置。 其中， 透镜体通过安装柱脚 31和安装孔 32安装在 PCB 板上。
[0039] 如图 4-5所示， 本实施例使用吋， 透镜体 A安装于 PCB板 B上， LED灯 C安装于透 镜体 A的光源安装孔中心， 光线从 LED灯 C发散出来经过透镜体 A的折射和反射 并从透镜体 A发散幵。
[0040] 本实施例中： 设置有入光凸点 41， 通过折射将经过透镜体中心的光线发散幵， 避免透镜体中心的辉度过大。 椭球面结构能使进入和射出透镜体的光线进行折 射， 使光线发射的角度更大， 进而 LED背光源对液晶面板的照射面积， 减少 LED 灯的使用数量和液晶电视的耗电量。 火花纹路用于处理杂散光吋， 让透镜体投 射出均匀的光斑。
[0041] 以上所揭露的仅为本发明较佳实施例而已， 当然不能以此来限定本发明之权利 范围， 因此依本发明权利要求所作的等同变化， 仍属本发明所涵盖的范围。

Claims

权利要求书
一种椭球面广角背光源透镜， 包括透镜体， 所述透镜体设置有出光顶 面、 出光侧面、 以及反光底面， 所述出光侧面的上边缘和下边缘分别 与所述出光顶面的外边缘、 反光底面的外边缘连接， 所述反光底面中 心设置有光源安装孔， 所述光源安装孔的内壁为入光面， 所述入光面 的下边缘与所述反光底面的内边缘连接； 其特征在于： 所述光源安装 孔的顶部中心设置有向下凸起的入光凸点； 所述出光顶面、 入光面以 及入光凸点的表面均为椭球面结构。
根据权利要求 1所述的一种椭球面广角背光源透镜， 其特征在于： 以 所述反光底面的中心为笛卡尔坐标系的原点 0， 设置 X、 Υ、 Ζ轴； 所 述出光顶面、 入光面以及以及入光凸点的表面的方程式分别为：
X !2/a !2+y !2/b !2+z x 2lc x 2=\,
x22/a2 2+y 2 2/b22+z2 2/c22=l，
x 3 2/a 3 2+y 3 2 32+z 3 2/c 32=1；
其中， a ! >b ! >c ! , c 2>b 2> a2, b 3 > c 3> a 3;
根据权利要求 2所述的一种椭球面广角背光源透镜， 其特征在于： ai
： b 1 :C l、 2:152: &2和153 ^3: &3中， 任意两者或三者相等。
根据权利要求 2所述的一种椭球面广角背光源透镜， 其特征在于： ai >a 2 >a 3 , b！ > b 2 > b 3, c c^c^
根据权利要求 1所述的一种椭球面广角背光源透镜， 其特征在于： 所 述出光侧面为圆柱面。
根据权利要求 1或 4所述的一种椭球面广角背光源透镜， 其特征在于： 所述出光侧面和反光底面设置有火花纹路。
根据权利要求 1所述的一种椭球面广角背光源透镜， 其特征在于： 所 述反光底面设置有安装柱脚和安装孔。
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