WO2013097156A1 - 一种led导光透镜 - Google Patents

一种led导光透镜 Download PDF

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Publication number
WO2013097156A1
WO2013097156A1 PCT/CN2011/084946 CN2011084946W WO2013097156A1 WO 2013097156 A1 WO2013097156 A1 WO 2013097156A1 CN 2011084946 W CN2011084946 W CN 2011084946W WO 2013097156 A1 WO2013097156 A1 WO 2013097156A1
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WIPO (PCT)
Prior art keywords
light
body portion
led light
guiding lens
light guiding
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Application number
PCT/CN2011/084946
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English (en)
French (fr)
Inventor
胡挺进
Original Assignee
胡斌
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Application filed by 胡斌 filed Critical 胡斌
Priority to PCT/CN2011/084946 priority Critical patent/WO2013097156A1/zh
Publication of WO2013097156A1 publication Critical patent/WO2013097156A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/61—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using light guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to the field of LED illumination, and in particular to a light guiding lens in an apparatus such as an LED transparent bulb lamp and an LED transparent candle lamp.
  • BACKGROUND OF THE INVENTION LED light fixtures commonly used in the market, especially LED light bulbs are single cylindrical lenses.
  • the single cylindrical lens generally includes a base for connecting an LED substrate, and extends upward from the base. a cylindrical body, and a light exiting portion having an inverted conical light exiting surface formed at an upper end portion of the body. It can be seen from Fig.
  • the light emitted by the LED is transmitted upward through the cylindrical body to the light exiting portion, and after being refracted or reflected and refracted, is mainly emitted from the three surface regions, specifically including a vertical surface substantially along the axis direction of the cylindrical body.
  • a first annular area having a 60 degree angle with the vertical area, and a second annular area at an angle of 60 degrees to the first annular area, and the first and second annular areas and the vertical area The area can be adjusted by adjusting the size of the cylindrical body and the light exiting portion, but the adjustment range is limited.
  • the angle of the light emitted by the lamp post can reach about 240 degrees, but there is still a blind spot of 120 degrees, so that the coverage of the emitted light is not large enough; in addition, the emitted light is mainly concentrated in the above vertical area, that is, the concentrated light is mainly concentrated. In the area facing the light guiding lens, therefore, the outgoing light is concentrated and not uniform enough; further, for the light guiding lens of such a structure, on the one hand, it is impossible to ensure that the incident light is collected in the light guiding lens, and the other In view, the incident light needs to be re-emitted through the entire cylindrical body, so the light loss is large.
  • the LED light guiding lens of the present invention comprises a body portion, and a light exiting portion extending from at least two directions from the body portion, and an end of the free end of the light exiting portion is recessed toward the inner surface to form a light-emitting surface of the recess.
  • the end of the free end of the light exit portion is recessed inward to form an inverted conical light exiting surface, and the inverted conical shape is a cone
  • the bottom surface is formed on the end surface of the free end of the light exit portion.
  • the body portion extends from the center line of the body portion at an angle to the light exit portion.
  • the light exiting portion is evenly distributed around the center line of the body portion in the circumferential direction.
  • the angle between the center line of each light exiting portion and the center line of the body portion is equal, and the angle between the center line of each light exiting portion and the center line of the body portion is equal, wherein the center line and the inverted cone of the body portion
  • the center line of the shaped surface coincides.
  • the bottom portion of the body portion is recessed inward to form a hollow portion for accommodating the LED illuminator.
  • the top surface of the hollow portion as the light incident surface is a curved surface which is smaller than the distance from the center line of the main body portion to the bottom surface of the main body portion, so that the light incident surface is Similar to a concave lens, the incident light can be diffused, so that more light energy is emitted through the plurality of light exiting portions, which not only increases the angle of the outgoing light more effectively, but also makes the outgoing light more uniform.
  • the light incident surface is a part of a spherical surface, and the spherical center corresponding to the spherical surface is located on a center line of the body portion.
  • the height of the highest point of the center line of the hollow portion of the hollow portion accounts for 1/4 to 1/2 of the total height of the LED light guiding lens, so as to reduce the distance of the incident light passing through the LED light guiding lens, and reduce the light. damage.
  • the ratio of the height of the body portion to the total height is greater than 1/2.
  • the body portion is a truncated cone shape having a large diameter of the bottom surface.
  • the head of the LED light guiding lens adopts a bifurcated structure, which can increase the angle of the outgoing light and improve the uniformity of light output, so that it is closer to the traditional incandescent lamp when emitting light;
  • the hollow portion of the illuminating source is arranged to maximize the incident light into the lens.
  • the illuminating surface adopts a dicaque design, similar to a concave lens, which can expand the range of light passing through the lens, so that more Light can be emitted through the light exit portion of the bifurcated design.
  • FIG. 1 shows the structure of a conventional LED light guiding lens and the distribution of emitted light;
  • FIGS. 2a and 2b are perspective views of different perspectives of an embodiment of an LED light guiding lens according to the present invention
  • Figure 3 is a front elevational view of the LED light guiding lens of Figures 2a and 2b;
  • Figure 4 is a cross-sectional view taken along line A-A of Figure 3;
  • Figure 5 shows the distribution of the outgoing light of the LED light guiding lens shown in Figures 2a and 2b;
  • Figures 6a and 6b show partial size definitions of LED light guide lenses.
  • the LED light guiding lens of the present invention comprises a body portion 2, and a light exit portion 3 extending from the body portion 2 in at least two directions, and the end of the free end of each light exit portion 3 is recessed inward.
  • the inverted conical light-emitting surface 31 as shown in FIG. 4, the bottom surface of the light-emitting surface 31 can be extended to the entire end surface of the free end of the light-emitting portion.
  • the apex angle of the light-emitting surface 31 is preferably designed as 60 degrees.
  • the LED light guiding lens of the present invention can be designed as a three-fork type (ie, three light exiting portions 3), a four-forked type or more bifurcated structures, and the more the bifurcation is, the more uniform the light is.
  • the three-fork type shown in the figure is an implementation structure that can balance performance, manufacturing cost and aesthetics.
  • the light of the LED light guiding lens of the plurality of light exiting portions 3 is less than 64 degrees, and the arc angle can be reduced to 20 degrees by adjusting the inclination of the light emitting part 3.
  • the left and right (the inclination angle is the angle between the center line of each light-emitting portion 3 and the center line of the main body portion 2, and the inclination angle of each light-emitting portion is preferably equal), and does not affect the upper light-emitting effect, which is relative to the existing LED light guiding lens.
  • the 120-degree blind zone has a large improvement; in addition, the plurality of light-emitting portions 3 are arranged to balance the light intensity in the vertical area and the surrounding area to make the light uniform.
  • the bottom portion of the main body portion 2 extends outward in the horizontal direction with a connecting base 1 for fixing the LED light guiding lens, and the connecting base 1 is provided with a connecting hole through which the fastener passes.
  • the connecting base 1 can be three connecting legs, and the structure is simple and stable.
  • the body portion 2 can extend out of the light exit portion 3 at an angle to the center line of the body portion 2, that is, as an implementation structure, not in the center line direction of the body portion 2
  • the light exit portion 3 can be uniformly distributed around the center line of the body portion 2 in the circumferential direction, which can increase the uniformity of the emitted light in the lateral space.
  • the bottom portion of the body portion 2 is recessed to form a hollow portion 21 for accommodating the LED illuminator, and the hollow portion 21 can collect as much light as possible into the LED light guiding lens.
  • the top surface of the hollow portion 21 as the light incident surface may be designed such that the distance from the bottom surface of the main body portion 2 is smaller and smaller from the point passing through the center line of the main body portion 2, so that the light incident surface Corresponding to a concave lens, which diffuses the incident light and cooperates with a plurality of distributed light-emitting portions, so that more light energy can be emitted through the plurality of light-emitting portions, which not only increases the angle of the emitted light more effectively, but also makes it more effective.
  • the light is more uniform.
  • the arc surface of the light incident surface may be a part of a spherical surface, and the spherical center corresponding to the spherical surface is located on the center line of the body portion 2.
  • the arc of the illuminating surface can be selected according to the selected lamp cup, lampshade and light source. Usually, it can be R12 ⁇ R20mm, for example, for the 54th cup and the Sharp 4WLED source generated by Lucerne Lighting Co., Ltd.
  • the curvature of the smooth surface can be designed to be R15.27mm.
  • the height h2 at the highest point of the center line of the hollow portion 21 passing through the body portion 2 may be 1/4 to 1/2 of the total height of the LED light guiding lens, within the range.
  • the height of the hollow portion 21 can be designed to achieve both a reduction in light loss and a light-emitting effect.
  • the height hi of the body portion 2 i.e., the height of the bifurcation point
  • 1/2 of the total height is generally greater than 1/2 of the total height.
  • the total height h of the LED light guiding lens the height hl of the main body portion 2, the length L of the light exit portion 3 (forked cylinder), the diameter D of the light exit portion 3, and the hollow portion
  • the height h2 of 21 and the apex angle of the light-emitting surface 31 and the like can be adjusted according to the shape and size of the lamp cup to obtain the light-emitting effect closer to the conventional incandescent lamp by using the structure of the LED light guiding lens of the present invention.
  • the height hi of the body portion 2 should be 1/2 to 3/2 of the radius of the lamp cup, and the length L of the light exit portion 3 should be 1/3 to 1/2 of the radius of the lamp cup. As shown in FIGS.
  • the body portion 2 can be designed in the shape of a truncated cone having a large diameter of the bottom surface.
  • the material of the LED light guiding lens of the present invention may be PMMA (polymethyl methacrylate).

Abstract

一种LED导光透镜，包括本体部（2）和从本体部（2）向至少两个方向延伸的出光部（3）。出光部（3）的自由端的端面向内凹陷形成内凹陷的出光面（31）。本体部（2）的底面向内凹陷形成用于容置LED发光体的中空部（21）。LED导光透镜的头部采用分叉结构，可以增大出射光角度，提高出光均匀度，使其在发光时更接近传统白炽灯。本体部（2）设置的中空部（21）可以最大程度地将光线收入透镜中。

Description

一种 LED导光透镜
技术领域 本发明涉及 LED照明领域， 具体的讲， 涉及 LED透明球泡灯以及 LED透明蜡烛灯 等装置内的导光透镜。 背景技术 目前市场常用的 LED灯具， 尤其是 LED灯泡的导光透镜为单体柱状透镜， 如图 1 所示， 该种单体柱状透镜一般包括用于连接 LED基板的底座， 从底座向上延伸的一圆柱 形本体， 以及在本体上端部形成的具有倒圆锥形出光面的出光部。 由图 1可见， LED发 出的光通过圆柱形本体向上传送至出光部，经过折射或反射和折射后，主要从三个面域向 外发射， 具体讲包括基本沿圆柱形本体轴线方向的垂直面域， 与该垂直面域呈 60度的第 一环形面域， 以及与第一环形面域呈 60度夹角的第二环形面域， 而第一、 第二环形面域 和垂直面域的面积可通过调整圆柱形本体和出光部的尺寸进行调整，但调整范围有限。这 样， 该种灯柱的出射光角度可达约 240度， 但仍有 120度的盲区， 从而出射光的覆盖范围 不够大； 另外， 出射光主要集中在上述垂直面域， 即出射光主要集中在与导光透镜正对的 区域上， 因此， 使出射光较为集中而不够均匀； 此外， 对于该种结构的导光透镜， 一方面 无法保证入射光均收集于该导光透镜中， 另一方面入射光需要经过整个圆柱形本体再出 射， 因此光损较大。 发明内容 本发明的目的是要解决的上述问题， 至少提供一种可增大出射光角度的 LED导光透 镜。 为解决上述技术问题， 本发明提供的 LED导光透镜包括本体部， 以及从本体部向至 少二个方向延伸的出光部， 所述出光部的自由端的端面向内凹陷形成内陷的出光面。 其中，所述出光部的自由端的端面向内凹陷形成倒圆锥形出光面，倒圆锥形即为圆锥 的底面形成于出光部的自由端的端面上。 其中， 所述本体部相对本体部的中心线呈角度延伸出所述出光部。 其中， 所述出光部在周向上围绕本体部的中心线均匀分布。 其中，各出光部的中心线与本体部的中心线之间的夹角相等，各出光部的中心线与本 体部的中心线之间的夹角相等， 其中， 本体部的中心线与倒圆锥形出光面的中心线重合。 其中， 所述本体部的底面向内凹陷， 形成用于容置 LED发光体的中空部。 其中，所述中空部的作为入光面的顶面为与本体部的底面之间的距离从过本体部的中 心线的点向四周越来越小的弧面， 这样， 该入光面就类似于一凹透镜， 可对入射光进行扩 散， 使更多的光能通过多个出光部出射， 不仅更有效地增大了出射光角度， 而且使出射光 更加均匀。 其中， 所述入光面为球面的一部分， 所述球面对应的球心位于本体部的中心线上。 其中， 所述中空部的过本体部的中心线的最高点处的高度占 LED导光透镜的总高度 的 1/4至 1/2， 以减少入射光经过 LED导光透镜的距离， 降低光损。 其中， 所述本体部的高度占总高度的比例大于 1/2。 其中， 所述本体部为底面直径较大的圆台形。 本发明的有益效果为： 一方面， LED 导光透镜的头部采用分叉结构， 可以增大出射 光角度， 提高出光均匀度， 使其在发光时更接近传统白炽灯； 另一方面， 本体部设置有容 置发光源的中空部，以最大程度地将入射光线收入透镜中，另外，入光面采用微凹型设计， 类似于一个凹透镜，可以使光通过透镜的范围扩大，使更多的光能够通过分叉设计的出光 部射出。 附图说明 图 1示出了现有的 LED导光透镜的结构及出射光的分布情况；
图 2a和 2b为根据本发明的 LED导光透镜的一种实施结构的不同视角的立体示意图； 图 3为图 2a和 2b所示 LED导光透镜的主视图；
图 4为图 3的 A-A向剖视图；
图 5示出了图 2a和 2b所示 LED导光透镜的出射光的分布情况；
图 6a和 6b示出了 LED导光透镜的部分尺寸定义。 具体实施方式 如图 2a和 2b所示， 本发明的 LED导光透镜包括本体部 2， 以及从本体部 2向至少 二个方向延伸的出光部 3，各出光部 3的自由端的端面向内凹陷形成但不局限于如图 4所 示的倒圆锥形出光面 31， 出光面 31的底面可扩及出光部的自由端的整个端面， 如图 4所 示， 该出光面 31的顶角优选设计为 60度。 在此， 本发明的 LED导光透镜可以设计为三 分叉型 （即延伸出三个出光部 3)、 四分叉型或者更多分叉的结构， 且理论上分叉越多出 光越均匀，但考虑到制作工艺复杂以及外形美观等因素， 图中所示的三分叉型是一种可兼 顾性能、制作成本和美观性的实施结构。 如图 5所示， 针对一种实施结构， 设置多个出光 部 3的 LED导光透镜的光线未达弧度仅为 64度，且可以通过调整出光部 3的倾角将未达 弧度縮小至 20度左右 （倾角为各出光部 3的中心线与本体部 2的中心线之间的夹角， 各 出光部的倾角优选为相等）， 并且不影响上部出光效果， 这相对于现有 LED 导光透镜的 120度盲区具有较大的改善； 另外， 设置多个出光部 3可均衡垂直面域和四周面域内的光 强， 使出光均匀。 另外， 根据安装要求， 上述本体部 2的底部沿水平方向向外延伸有用于固定 LED导 光透镜的连接底座 1， 连接底座 1上设置有供紧固件穿过的连接孔。 该连接底座 1可为三 个连接脚， 该种结构即简单， 又稳固。 为了增加出射光在纵向空间内的均匀性，上述本体部 2可相对本体部 2的中心线呈角 度延伸出该出光部 3， 即作为一种实施结构，在本体部 2的中心线方向上不具有出光部 3。 该出光部 3可在周向上围绕本体部 2的中心线均匀分布，这样可以增加出射光在横向空间 内的均匀性。 如图 3和 4所示， 本体部 2的底面向内凹陷形成用于容置 LED发光体的中空部 21， 中空部 21—方面可以尽可能多地将出射光收入 LED导光透镜中，另一方面可縮短光线在 透镜中的行进路径， 有效地减少光损。 该中空部 21的作为入光面的顶面可设计为与本体部 2的底面之间的距离从过本体部 2的中心线的点向四周越来越小的弧面， 使该入光面相当于一凹透镜， 以对入射光进行扩 散， 配合多个分散设计的出光部使用， 可使更多的光能通过多个出光部出射， 不仅更有效 地增大了出射光角度， 而且使出射光更加均匀。该入光面的弧面可为球面的一部分， 该球 面对应的球心位于本体部 2的中心线上。该入光面的弧度可根据所选用的灯杯、灯罩和光 源进行选择， 通常情况下可为 R12〜R20mm，例如， 对于煜森照明有限公司生成的 54号 灯杯以及夏普 4WLED光源， 该入光面的弧度可设计为 R15.27mm。 通常情况下， 如图 4所示， 中空部 21 的过本体部 2的中心线的最高点处的高度 h2 可占 LED导光透镜的总高度的 1/4至 1/2， 在该范围内设计中空部 21的高度可以兼顾降 低光损和出光效果。 如图 6a和 6b所示， 本体部 2的高度 hi (即分叉点高度） 占总高度 的比例通常大于 1/2。 在此， 如图 6a和 6b所示， 对于 LED导光透镜的总高度 h， 本体部 2的高度 hl、 出 光部 3 (分叉柱体） 的长度 L、 出光部 3的直径 D、 中空部 21的高度 h2和出光面 31的 顶角等尺寸，本领域技术人员均可根据灯杯的外形和尺寸进行调整，以利用本发明的 LED 导光透镜的结构获得更接近传统白炽灯的出光效果， 通常情况下， 本体部 2的高度 hi的 高度应介于灯杯半径的 1/2〜3/2， 出光部 3的长度 L应介于灯杯半径的 1/3〜1/2。 如图 3和 4所示， 本体部 2可设计为底面直径较大的圆台形。 本发明的 LED导光透 镜的材质可采用 PMMA (聚甲基丙烯酸甲酯）。 以上所述仅为本发明较佳的实施方式，并非用来限定本发明的实施范围，但凡在本发 明的保护范围内所做的等效变化及修饰， 皆应认为落入了本发明的保护范围内。

Claims

权利要求书
1. 一种 LED导光透镜， 其特征在于： 包括本体部， 以及从本体部向至少二个方向延伸 的出光部， 所述出光部的自由端的端面向内凹陷形成内陷的出光面。
2. 根据权利要求 1所述的 LED导光透镜， 其特征在于： 所述出光部的自由端的端面向 内凹陷形成倒圆锥形出光面。
3. 根据权利要求 1或 2所述的 LED导光透镜， 其特征在于： 所述本体部相对本体部的 中心线呈角度延伸出所述出光部。
4. 根据权利要求 3所述的 LED导光透镜， 其特征在于： 所述出光部在周向上围绕本体 部的中心线均匀分布。
5. 根据权利要求 1或 2所述的 LED导光透镜， 其特征在于： 各出光部的中心线与本体 部的中心线之间的夹角相等， 其中， 本体部的中心线与出光面的中心线重合。
6. 根据权利要求 1或 2所述的 LED导光透镜， 其特征在于： 所述本体部的高度占 LED 导光透镜的总高度的比例大于 1/2。
7. 根据权利要求 1或 2中任一项所述的 LED导光透镜， 其特征在于： 所述本体部的底 面向内凹陷， 形成用于容置 LED发光体的中空部。
8. 根据权利要求 7所述的 LED导光透镜， 其特征在于： 所述中空部的作为入光面的顶 面为与本体部的底面之间的距离从过本体部的中心线的点向四周越来越小的弧面。
9. 根据权利要求 8所述的 LED导光透镜， 其特征在于： 所述入光面为球面的一部分， 所述球面对应的球心位于本体部的中心线上。
10. 根据权利要求 8所述的 LED导光透镜， 其特征在于： 所述中空部的过本体部的中心 线的最高点处的高度占 LED导光透镜的总高度的 1/4至 1/2。
PCT/CN2011/084946 2011-12-29 2011-12-29 一种led导光透镜 WO2013097156A1 (zh)

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Publication number Priority date Publication date Assignee Title
CN201232875Y (zh) * 2008-07-09 2009-05-06 卢景华 一种光纤灯
CN201286105Y (zh) * 2008-07-16 2009-08-05 上海方立数码科技有限公司 指纹识别与pki体系相结合的身份认证系统
CN201448661U (zh) * 2009-08-13 2010-05-05 鹤山丽得电子实业有限公司 一种带导光柱的大功率led灯泡
CN102003680A (zh) * 2009-08-28 2011-04-06 通用电气公司 发光二极管-导光件耦联装置
CN201811136U (zh) * 2010-04-12 2011-04-27 邱爽 导光式太阳能照明装置
CN201892080U (zh) * 2010-10-30 2011-07-06 潘家红 带导光柱的led灯泡

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201232875Y (zh) * 2008-07-09 2009-05-06 卢景华 一种光纤灯
CN201286105Y (zh) * 2008-07-16 2009-08-05 上海方立数码科技有限公司 指纹识别与pki体系相结合的身份认证系统
CN201448661U (zh) * 2009-08-13 2010-05-05 鹤山丽得电子实业有限公司 一种带导光柱的大功率led灯泡
CN102003680A (zh) * 2009-08-28 2011-04-06 通用电气公司 发光二极管-导光件耦联装置
CN201811136U (zh) * 2010-04-12 2011-04-27 邱爽 导光式太阳能照明装置
CN201892080U (zh) * 2010-10-30 2011-07-06 潘家红 带导光柱的led灯泡

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