WO2015192347A1 - Led透镜及包括该led透镜的led光源 - Google Patents

Led透镜及包括该led透镜的led光源 Download PDF

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Publication number
WO2015192347A1
WO2015192347A1 PCT/CN2014/080264 CN2014080264W WO2015192347A1 WO 2015192347 A1 WO2015192347 A1 WO 2015192347A1 CN 2014080264 W CN2014080264 W CN 2014080264W WO 2015192347 A1 WO2015192347 A1 WO 2015192347A1
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WO
WIPO (PCT)
Prior art keywords
curved surface
led
led lens
upper curved
light
Prior art date
Application number
PCT/CN2014/080264
Other languages
English (en)
French (fr)
Inventor
李秀富
袁永刚
Original Assignee
苏州东山精密制造股份有限公司
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 苏州东山精密制造股份有限公司 filed Critical 苏州东山精密制造股份有限公司
Priority to US15/128,229 priority Critical patent/US20170122523A1/en
Priority to PCT/CN2014/080264 priority patent/WO2015192347A1/zh
Priority to JP2016561293A priority patent/JP2017519328A/ja
Priority to KR1020167026195A priority patent/KR20160124883A/ko
Publication of WO2015192347A1 publication Critical patent/WO2015192347A1/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
    • F21K9/69—Details of refractors forming part of the light source
    • 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
    • F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
    • 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
    • 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
    • F21V5/043—Refractors for light sources of lens shape the lens having cylindrical faces, e.g. rod lenses, toric lenses
    • 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
    • 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
    • G02B3/0006—Arrays
    • 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

  • LED lens and LED light source including the same
  • the present invention relates to the field of LED lens manufacturing, and in particular to an LED lens and the like
  • the LED is a point source that emits a certain angle of light. When used in a direct-lit LCD backlight, it requires hundreds or even thousands of primary colors to be arranged in a certain array to form a surface light source. Converting from a point source to a uniform surface source is a key technology for LED backlights. In the prior art, a lens is usually mounted on the LED to change the light intensity distribution of the LED.
  • the LED lens in the prior art is an axisymmetric rotating entity, comprising: an incident surface, the incident surface comprising: a central curved surface 01 located at a center of the LED lens and located around the central curved surface 01, a bottom surface 02 connected to the central curved surface 01, wherein the central curved surface 01 is a spherical crown curved surface; an exit surface comprising: a side surface 03 perpendicularly connected to the bottom surface 02, connected to the side surface 03 a first upper curved surface 04 and a second upper curved surface 05, wherein the first upper curved surface 04 and the second upper curved surface 05 are connected, and are symmetrical about an axis of the LED lens, thereby using the LED lens to The LED emits a point source light that is converted into a surface source light.
  • an embodiment of the present invention provides an LED lens and an LED light source including the LED lens to improve uniformity of light intensity distribution of the LED light source.
  • the embodiment of the present invention provides the following technical solutions:
  • An LED lens comprising:
  • An incident surface comprising: a central curved surface located at a center of the LED lens; and a bottom surface located around the central curved surface and connected to the central curved surface;
  • An exit surface includes: a side surface perpendicularly connected to the bottom surface, a first upper curved surface and a second upper curved surface connected to the side surface, wherein the first upper curved surface and the second upper curved surface are connected, and Symmetrical about the axis of the LED lens;
  • the curved surface emits light that forms a bright ring to scatter.
  • the scattering microstructure is further located at an angle of 60° between the side surface and the bottom surface
  • the scattering microstructure is an annular structure parallel to the bottom surface.
  • the projections of adjacent scattering microstructures on the bottom surface meet end to end.
  • the distance between the two ends of the scattering microstructure is 0 ⁇ ⁇ -100 ⁇ ⁇ , excluding the left end point value.
  • the scattering microstructure is an axisymmetric structure.
  • the manufacturing process of the LED lens is an injection molding process.
  • An LED light source comprising:
  • the LED light-emitting chip wherein the LED light-emitting chip is located in a cavity formed by a central curved surface of the LED lens and a bottom surface of the LED lens, and The position of the scattering microstructure in the LED lens corresponds to the position of the bright ring in the light intensity distribution of the LED light emitting chip.
  • the technical solution provided by the embodiment of the present invention includes, in addition to the central curved surface and the bottom surface in the incident surface, and the side surface, the first upper curved surface and the second upper curved surface in the exit surface, the method further includes: the first upper curved surface and the first surface a scattering microstructure on the upper curved surface, the position of the scattering microstructure corresponding to the position of the bright ring in the LED light intensity distribution, and scattering the light formed by the first upper curved surface and the second upper curved surface to form a bright ring Therefore, under the premise that the main direction of the light of the LED light-emitting chip is not changed, the light forming the bright ring position is slightly scattered, the light intensity at the position of the bright ring of the LED light source is lowered, and the dark ring position of the LED light source is increased. The intensity of the light increases the uniformity of the light intensity distribution of the LED light source.
  • FIG. 1 is a schematic structural view of an LED lens in the prior art
  • FIG. 2 is a schematic view showing the distance from the different positions of the center surface of the LED lens to the LED emission center in the prior art
  • FIG. 3 is a schematic structural view of an LED lens provided in an embodiment of the present invention.
  • FIG. 4 is an enlarged schematic view showing a partial structure of an LED lens according to an embodiment of the present invention
  • FIG. 5 is a schematic view showing a partial structure optical path of an LED lens according to an embodiment of the present invention.
  • the light emitted by the LED is emitted by the LED lens of the prior art. After the uniformity is poor.
  • the inventor has found that this is because the light emitted by the LED itself is non-uniform, but the center point is taken as the starting point, and the process of bright-dark-light is formed, that is, a plurality of bright and dark annular stripes are formed, thereby The light emitted by the LED still forms a plurality of bright and dark annular stripes after passing through the LED lens, and the hook is poor.
  • the central curved surface 01 of the LED lens is a spherical crown surface, and the distance R from the central curved surface 01 to the emission center (ie, LED) decreases as the emission angle increases, as shown in FIG. R2 ⁇ R1, so that the light intensity distribution of the LED emitted light through the LED lens can be adjusted by adjusting the distance from the central curved surface 01 to the emission center.
  • the distance R from the center curved surface 01 to the emission center ie, LED
  • an embodiment of the present invention provides an LED lens, which not only includes:
  • An incident surface comprising: a central curved surface located at a center of the LED lens; and a bottom surface located around the central curved surface and connected to the central curved surface;
  • An exit surface includes: a side surface perpendicularly connected to the bottom surface, a first upper curved surface and a second upper curved surface connected to the side surface, wherein the first upper curved surface and the second upper curved surface are connected, and Symmetrical about the axis of the LED lens;
  • the curved surface emits light that forms a bright ring to scatter.
  • an LED light source including:
  • LED light emitting chip wherein the LED light emitting chip is located in a cavity formed by a central curved surface of the LED lens and a bottom surface of the LED lens, and a position of the scattered microstructure in the LED lens and an LED The position of the bright ring in the light intensity distribution of the light-emitting chip corresponds.
  • the LED lens provided by the embodiment of the present invention and the LED light source including the LED lens include, in addition to the central curved surface and the bottom surface in the incident surface, and the side surface in the exit surface, compared with the LED lens in the prior art.
  • a first upper curved surface and a second upper curved surface further comprising: a scattering microstructure on the first upper curved surface and the second upper curved surface, the position of the scattering microstructure and the position of the bright ring in the LED light intensity distribution
  • the light that is emitted through the first upper curved surface and the second upper curved surface to form a bright ring is scattered, so that the light forming the bright ring position can be performed without changing the main forward direction of the light of the LED light emitting chip.
  • Slightly scattering reducing the light intensity at the position of the bright ring of the LED light source, increasing the light intensity at the position of the dark ring of the LED light source, and improving the uniformity of the light intensity distribution of the LED light source.
  • an embodiment of the present invention provides an LED lens, including: an incident surface, the incident surface includes: a central curved surface 1 located at a center of the LED lens, and located around the central curved surface 1 a bottom surface 2 connected to the central curved surface 1;
  • An exit surface includes: a side surface 3 perpendicularly connected to the bottom surface 2, a first upper curved surface 4 and a second upper curved surface 5 connected to the side surface 3, the first upper curved surface 4 and the second surface
  • the upper curved surface 5 is connected and is symmetrical about an axis of the LED lens;
  • the LED lens provided by the embodiment of the present invention is increased compared with the LED lens of the prior art.
  • Scattering microstructures 6 on the first upper curved surface 4 and the second upper curved surface 5, the position of the scattering microstructures 6 corresponding to the position of the bright ring in the LED light intensity distribution, and the first upper curved surface 4 and the second upper curved surface 5 emits light that forms a bright ring to scatter, as shown in FIG. 5, so that the light of each angle is mixed, so that part of the light that should be concentrated at the position of the bright ring in the light intensity distribution of the LED light source can be scattered.
  • the scattering microstructure 6 is an annular structure parallel to the bottom surface 2, thereby ensuring that the main traveling direction of the original light is not changed, and The light is slightly scattered, so that the corresponding light at the position of the original bright ring is partially scattered to the position of the dark ring adjacent to the bright ring, and the light intensity at the position of the bright ring is lowered to provide the position of the dark ring.
  • the intensity of the light is increased, thereby increasing the uniformity of the light emitted by the LED after being emitted by the LED lens, that is, increasing the uniformity of the light intensity distribution on the receiving surface of the light emitted by the LED.
  • the projections of the adjacent scattering microstructures 6 on the bottom surface 2 are joined end to end, that is, except for the two ends of the scattering microstructures 6,
  • the projections of the adjacent scattering microstructures 6 do not overlap, thereby ensuring that light emitted through a point on the first upper curved surface 4 or the second upper curved surface 5 of the LED lens is not repeatedly scattered by the plurality of scattering microstructures 6, affecting scattering effect.
  • the distance between the two ends of the scattering microstructure 6 is preferably 0 ⁇ ⁇ -100 ⁇ ⁇ , excluding the left endpoint value, more preferably 20 ⁇ m, 30 ⁇ , and 50 ⁇ , so as to ensure that the main direction of the original light is not changed, and the direction of the original light is excessively changed due to the increase of the scattering microstructure 6, thereby reducing the light emitted by the LED.
  • the scattering microstructure 6 is preferably an axisymmetric structure such that a portion of the intensity at the bright ring is scattered to the bright Ring On the dark rings on both sides, the uniformity of the LED light emitted through the LED lens is further improved.
  • the scattering microstructure 6 is further located at an angle between the side surface 3 and the bottom surface 2 in a range of 60° - 90°.
  • the endpoint value ie, the area where the LED emits half the light intensity
  • a large angle of light is scattered so that a portion of the light can be directed toward the receiving surface (ie, the illuminated surface), and a portion of the light is scattered to the additional set of reflections.
  • the chip After being reflected, it is redirected to the receiving surface to increase the light energy on the receiving surface.
  • the manufacturing process of the LED lens provided by the embodiment of the present invention is preferably an integrated molding process, more preferably an injection molding process, including: manufacturing a LED lens provided by the embodiment of the present invention by using a single-point diamond lathe processing process Corresponding lens model;
  • the LED lens provided by the embodiment of the invention is fabricated on the basis of the lens model by using an injection molding process.
  • the LED lens when a lens model corresponding to the LED lens provided by the embodiment of the present invention is fabricated by using a single-point diamond lathe processing process, only a single-point diamond lathe processing process is used.
  • the LED lens it is only necessary to move the X coordinate and the Y coordinate in a certain direction at a position where the scattering microstructure 6 needs to be formed.
  • the present invention is not limited thereto.
  • the LED lens may be other manufacturing methods, as the case may be.
  • the LED lens provided by the embodiment of the present invention includes, in addition to the central curved surface 1 and the bottom surface 2 in the incident surface, and the side surface 3, the first upper curved surface 4, and the second upper curved surface 5 in the exit surface, Included: a scattering microstructure 6 on the first upper curved surface 4 and the second upper curved surface 5, the position of the scattering microstructure 6 corresponding to the position of the bright ring in the LED light intensity distribution, for the first
  • the upper curved surface 4 and the second upper curved surface 5 emit light that forms a bright ring to be scattered, so that the light forming the bright ring position can be slightly scattered without changing the main direction of the light of the LED light emitting chip, so that the respective exit angles
  • the light mixing reduces the light intensity at the position of the bright ring of the LED light source, increases the light intensity at the position of the dark ring of the LED light source, and improves the uniformity of the light intensity distribution on the illuminated surface of the light emitted by the LED.
  • the embodiment of the present invention further provides an LED light source, comprising: an LED light emitting chip, and the LED lens provided by any of the above embodiments, wherein the LED lens comprises: an incident surface, wherein the incident surface comprises: a central curved surface of the center of the LED lens and a bottom surface connected to the central curved surface around the central curved surface; an exit surface, the exit surface comprising: a side perpendicularly connected to the bottom surface, connected to the side surface a first upper curved surface and a second upper curved surface, the first upper curved surface and the second upper curved surface being connected, and being symmetrical about an axis of the LED lens; scattering on the first upper curved surface and the second upper curved surface
  • the microstructure, the position of the scattering microstructure corresponding to the position of the bright ring in the LED light intensity distribution, and scattering the light that is emitted through the first upper curved surface and the second upper curved surface to form a bright ring.
  • the LED light emitting chip is located in a cavity formed by a central curved surface of the LED lens and a bottom surface of the LED lens, and a position of a scattering microstructure in the LED lens and a position of a bright ring in a light intensity distribution of the LED light emitting chip Corresponding.
  • the LED lens includes: a central curved surface and a bottom surface in the incident surface; a side surface in the exit surface, a first upper curved surface and a second upper curved surface, and the method further includes: Scattering microstructures on the first upper curved surface and the second upper curved surface, the position of the scattering microstructure corresponding to the position of the bright ring in the LED light intensity distribution, on the first upper curved surface and the second upper surface
  • the curved surface emits light that forms a bright ring to scatter, so that the light forming the bright ring position can be slightly scattered without changing the main direction of the light of the LED light emitting chip, so that the light of each exit angle is mixed, and the light is reduced.
  • the light intensity at the position of the LED light source at the bright ring increases the light intensity at the position of the dark ring of the LED light source, and improves the uniformity of the light intensity distribution on the illuminated surface of the LED light source.

Abstract

一种LED透镜及包括该LED透镜的LED光源，所述LED透镜除包括入射面中的中心曲面（1）和底面（2）以及出射面中的侧面（3）、第一上曲面（4）和第二上曲面（5）外，还包括：位于所述第一上曲面（4）和第二上曲面（5）上的散射微结构（6），所述散射微结构（6）的位置与LED光强分布中亮环的位置相对应，对经所述第一上曲面（4）和第二上曲面（5）射出形成亮环的光线进行散射，从而可以在不改变LED发光芯片光线主要前进方向的前提下，对其形成亮环位置的光线进行轻微散射，降低所述LED光源亮环位置处的光强，提高所述LED光源暗环位置处的光强，提高所述LED光源光强分布的均匀度。

Description

LED透镜及包括该 LED透镜的 LED光源 技术领域
本发明涉及 LED透镜制造技术领域， 尤其涉及一种 LED透镜及包括该
LED透镜的 LED光源。 背景技术
LED属于发出一定角度光束的点光源， 用于直下式液晶显示器背光源时， 需要数百甚至上千三基色 LED排布成一定阵列形成面光源。 从点光源转化成 均匀的面光源， 是 LED背光源的关键技术。 现有技术中， 通常在所述 LED上 安装透镜， 以改变 LED的光强分布。
如图 1所述， 现有技术中的 LED透镜为轴对称的旋转实体， 包括： 入射 面， 所述入射面包括： 位于所述 LED透镜中心的中心曲面 01以及位于所述中 心曲面 01四周， 与所述中心曲面 01相连接的底面 02, 其中， 所述中心曲面 01为球冠曲面； 出射面，所述出射面包括：与所述底面 02垂直连接的侧面 03 , 与所述侧面 03相连的第一上曲面 04和第二上曲面 05 , 其中， 所述第一上曲 面 04和第二上曲面 05相连接， 且关于所述 LED透镜的轴线对称， 从而利用 所述 LED透镜将所述 LED发出点光源光线转换成面光源光线。
但是， LED发出的光线经上述 LED透镜射出后均匀度较差。 发明内容
为解决上述技术问题，本发明实施例提供了一种 LED透镜以及包括该 LED 透镜的 LED光源， 以提高 LED光源光强分布的均匀度。
为解决上述问题， 本发明实施例提供了如下技术方案：
一种 LED透镜， 包括：
入射面， 所述入射面包括： 位于所述 LED透镜中心的中心曲面以及位于 所述中心曲面四周， 与所述中心曲面相连接的底面；
出射面， 所述出射面包括： 与所述底面垂直连接的侧面， 与所述侧面相连 接的第一上曲面和第二上曲面， 所述第一上曲面和第二上曲面相连接，且关于 所述 LED透镜的轴线对称；
此外， 还包括：
位于所述第一上曲面和第二上曲面上的散射微结构，所述散射微结构的位 置与 LED光强分布中亮环的位置相对应， 对经所述第一上曲面和第二上曲面 射出形成亮环的光线进行散射。
优选的， 所述散射微结构还位于所述侧面与所述底面之间的夹角在 60°
-90° 范围的区域内， 包括端点值。
优选的， 所述散射微结构为平行于所述底面的环状结构。
优选的， 相邻散射微结构在所述底面上的投影首尾相接。
优选的， 所述散射微结构两端之间的距离为 0 μ πι-100 μ πι, 不包括左端 点值。
优选的， 所述散射微结构为轴对称结构。
优选的， 所述 LED透镜的制作工艺为注塑工艺。
一种 LED光源， 包括：
LED发光芯片以及上述任一项所述的 LED透镜，其中，所述 LED发光芯 片位于所述 LED透镜的中心曲面与所述 LED透镜的底面所形成的腔体内，且 所述 LED透镜中散射微结构的位置与 LED发光芯片的光强分布中亮环的位置 相对应。 与现有技术相比， 上述技术方案具有以下优点：
本发明实施例所提供的技术方案，除包括入射面中的中心曲面和底面以及 出射面中的侧面、 第一上曲面和第二上曲面外， 还包括： 位于所述第一上曲面 和第二上曲面上的散射微结构， 所述散射微结构的位置与 LED光强分布中亮 环的位置相对应，对经所述第一上曲面和第二上曲面射出形成亮环的光线进行 散射， 从而可以在不改变 LED发光芯片光线主要前进方向的前提下， 对其形 成亮环位置的光线进行轻微散射， 降低所述 LED光源亮环位置处的光强， 提 高所述 LED光源暗环位置处的光强， 提高所述 LED光源光强分布的均匀度。
附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施 例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地， 下面描述 中的附图是本发明的一些实施例，对于本领域普通技术人员来讲， 在不付出创 造性劳动的前提下， 还可以根据这些附图获得其他的附图。
图 1为现有技术中 LED透镜的结构示意图；
图 2为现有技术中 LED透镜中心曲面不同位置到 LED发射中心的距离示 意图；
图 3为本发明一个实施例中所提供的 LED透镜的结构示意图；
图 4为本发明一个实施例中所提供的 LED透镜的局部结构放大示意图； 图 5为本发明一个实施例中所提供的 LED透镜的局部结构光路示意图。
具体实施方式
正如背景技术部分所述， LED发出的光线经现有技术中的 LED透镜射出 后均匀度较差。
发明人研发发现， 这是由于 LED发出的光线本身是非均匀的， 而是以其 中心点为起始点， 呈现亮-暗 -亮的过程， 即形成多个亮暗相间的环状条紋， 从 而导致所述 LED发出的光线经过所述 LED透镜后仍然形成多个亮暗相间的环 状条紋， 均勾度较差。
发明人进一步研究发现， 所述 LED透镜的中心曲面 01为球冠曲面， 且所 述中心曲面 01到发射中心 （即 LED ) 的距离 R随着发射角度的增加而减小， 如图 2所示， R2<R1 , 从而可以通过调节所述中心曲面 01各处到所述发射中 心的距离， 来调节 LED发出光线经过所述 LED透镜后的光强分布。 但是， 完 全依靠所述中心曲面 01各处到所述发射中心的距离 R值的减小较难实现均匀 的光学分布， 光学设计较为困难。
有鉴于此， 本发明实施例提供了一种 LED透镜， 不仅包括：
入射面， 所述入射面包括： 位于所述 LED透镜中心的中心曲面以及位于 所述中心曲面四周， 与所述中心曲面相连接的底面；
出射面， 所述出射面包括： 与所述底面垂直连接的侧面， 与所述侧面相连 接的第一上曲面和第二上曲面， 所述第一上曲面和第二上曲面相连接，且关于 所述 LED透镜的轴线对称；
还包括：
位于所述第一上曲面和第二上曲面上的散射微结构，所述散射微结构的位 置与 LED光强分布中亮环的位置相对应， 对经所述第一上曲面和第二上曲面 射出形成亮环的光线进行散射。
相应的， 本发明实施例还提供了一种 LED光源， 包括：
LED发光芯片以及上述的 LED透镜，其中，所述 LED发光芯片位于所述 LED透镜的中心曲面与所述 LED透镜的底面所形成的腔体内，且所述 LED透 镜中散射微结构的位置与 LED发光芯片的光强分布中亮环的位置相对应。 由此可见， 相较于现有技术中的 LED透镜， 本发明实施例所提供的 LED 透镜及包括该 LED透镜的 LED光源 , 除包括入射面中的中心曲面和底面 , 以 及出射面中的侧面、 第一上曲面和第二上曲面外， 还包括： 位于所述第一上曲 面和第二上曲面上的散射微结构， 所述散射微结构的位置与 LED光强分布中 亮环的位置相对应，对经所述第一上曲面和第二上曲面射出形成亮环的光线进 行散射， 从而可以在不改变 LED发光芯片光线主要前进方向的前提下， 对其 形成亮环位置的光线进行轻微散射， 降低所述 LED光源亮环位置处的光强， 提高所述 LED光源暗环位置处的光强，提高所述 LED光源光强分布的均匀度。 为使本发明的上述目的、特征和优点能够更为明显易懂， 下面结合附图对 本发明的具体实施方式做详细的说明。
在以下描述中阐述了具体细节以便于充分理解本发明。但是本发明能够以 多种不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本发明 内涵的情况下做类似推广。 因此本发明不受下面公开的具体实施的限制。 如图 3和图 4所示， 本发明实施例提供了一种 LED透镜， 包括： 入射面， 所述入射面包括： 位于所述 LED透镜中心的中心曲面 1以及位 于所述中心曲面 1四周， 与所述中心曲面 1相连接的底面 2;
出射面， 所述出射面包括： 与所述底面 2垂直连接的侧面 3 , 与所述侧面 3相连接的第一上曲面 4和第二上曲面 5, 所述第一上曲面 4和第二上曲面 5 相连接， 且关于所述 LED透镜的轴线对称；
位于所述第一上曲面 4和第二上曲面 5上的散射微结构 6, 所述散射微结 构 6的位置与 LED光强分布中亮环的位置相对应， 对经所述第一上曲面 4和 第二上曲面 5射出形成亮环的光线进行散射。
对比本发明实施例所提供的 LED透镜和现有技术中的 LED透镜可以发 现， 本发明实施例所提供的 LED透镜相较于现有技术中的 LED透镜， 增加了 位于所述第一上曲面 4和第二上曲面 5上的散射微结构 6, 所述散射微结构 6 的位置与 LED光强分布中亮环的位置相对应， 对经所述第一上曲面 4和第二 上曲面 5射出形成亮环的光线进行散射，如图 5所示，使得各个角度的光线混 合， 从而可以将原本应该集中到 LED光源光强分布中亮环位置处的部分光线 散射到 LED光源光强分布中的暗环位置处，降低 LED光源光强分布中亮环位 置处的光强， 提高 LED光源光强分布中暗环位置处的光强， 提高 LED光源所 发出光线接收面 （即照射面）上光强分布的均匀度。
在本发明的一个实施例中，如图 4所示， 所述散射微结构 6为平行于所述 底面 2的环状结构，从而可以保证既不改变原来光线的主要前进方向，还可以 对原来光线进行轻微的散射，使得原来亮环位置处对应的光线，部分散射到与 所述亮环相邻的暗环位置处， 降低所述亮环位置处的光强，提供上所述暗环位 置处的光强， 从而提高 LED发出的光线经所述 LED透镜射出后的均匀度， 即 提高 LED所发出光线的接收面上光强分布的均匀度。
在上述任一实施例的基础上， 在本发明的一个实施例中，相邻散射微结构 6在所述底面 2上的投影首尾相接， 即除了所述散射微结构 6的两端外， 相邻 散射微结构 6的投影不重叠， 从而保证经所述 LED透镜第一上曲面 4或第二 上曲面 5上某一点射出的光线， 不会被多个散射微结构 6重复散射， 影响散射 效果。
在上述任一实施例的基础上， 在本发明的另一个实施例中， 所述散射微结 构 6两端之间的距离优选为 0 μ πι-100 μ πι, 不包括左端点值， 更优选为 20 μ m、 30 μ πι和 50 μ πι, 从而保证不改变原来光线的主要前进方向， 避免由于增 加所述散射微结构 6而导致过度改变原来光线的前进方向， 降低 LED发出光 线经所述 LED透镜射出后的均匀度。
在上述任一实施例的基础上， 在本发明的又一个实施例中， 所述散射微结 构 6优选为轴对称结构，从而使得所述亮环处的部分光强均勾散射到所述亮环 两侧的暗环上， 进一步提高 LED发出光线经所述 LED透镜射出后的均匀度。 在上述任一实施例的技术上， 在本发明的再一个实施例中， 所述散射微结 构 6还位于所述侧面 3与所述底面 2之间的夹角在 60° -90° 范围的区域内， 包括端点值（即 LED发出光线半光强以外的区域）， 从而对大角度的光线进行 散射， 使得一部分光线能够射向接收面 （即照射面 ), 一部分光线散射到额外 设置的反射片上， 经反射后重新射向接收面， 提高所述接收面上的光能量。
需要说明的是， 本发明实施例所提供的 LED透镜的制作工艺优选为一体 成型工艺， 更优选为注塑工艺， 包括： 利用单点金刚石车床加工工艺， 制作与 本发明实施例所提供的 LED透镜相对应的透镜模型； 利用注塑工艺， 在所述 透镜模型的基础上制作本发明实施例所提供的 LED透镜。
具体的， 在本发明的一个实施例中， 利用单点金刚石车床加工工艺， 制作 与本发明实施例所提供的 LED透镜相对应的透镜模型时， 只需在利用单点金 刚石车床加工工艺， 制作现有技术中的 LED透镜时， 并在需要制作散射微结 构 6的位置， 将其 X坐标和 Y坐标沿一定方向进行一定的位移移动即可。 但 本发明对此并不做限定， 在本发明的其他实施例中， 所述 LED透镜还可以由 其他制作方法， 具体视情况而定。
综上所述， 本发明实施例所提供的 LED透镜， 除包括入射面中的中心曲 面 1和底面 2以及出射面中的侧面 3、 第一上曲面 4和第二上曲面 5夕卜， 还包 括： 位于所述第一上曲面 4和第二上曲面 5上的散射微结构 6 , 所述散射微结 构 6的位置与 LED光强分布中亮环的位置相对应， 对经所述第一上曲面 4和 第二上曲面 5射出形成亮环的光线进行散射， 从而可以在不改变 LED发光芯 片光线主要前进方向的前提下，对其形成亮环位置的光线进行轻微散射，使得 各个出射角度的光线混合， 降低所述 LED光源亮环位置处的光强， 提高所述 LED光源暗环位置处的光强， 提高所述 LED所发出光线的照射面上的光强分 布的均匀度。 相应的， 本发明实施例还提供了一种 LED光源， 包括： LED发光芯片以 及上述任一实施例所提供的 LED透镜， 其中， 所述 LED透镜包括： 入射面， 所述入射面包括： 位于所述 LED透镜中心的中心曲面以及位于所述中心曲面 四周， 与所述中心曲面相连接的底面； 出射面， 所述出射面包括： 与所述底面 垂直连接的侧面， 与所述侧面相连接的第一上曲面和第二上曲面， 所述第一上 曲面和第二上曲面相连接， 且关于所述 LED透镜的轴线对称； 位于所述第一 上曲面和第二上曲面上的散射微结构， 所述散射微结构的位置与 LED光强分 布中亮环的位置相对应，对经所述第一上曲面和第二上曲面射出形成亮环的光 线进行散射。 所述 LED发光芯片位于所述 LED透镜的中心曲面与所述 LED 透镜的底面所形成的腔体内，且所述 LED透镜中散射微结构的位置与 LED发 光芯片的光强分布中亮环的位置相对应。
由此可见， 本发明实施例所提供的 LED光源中， 所述 LED透镜除包括入 射面中的中心曲面和底面以及出射面中的侧面、 第一上曲面和第二上曲面外， 还包括： 位于所述第一上曲面和第二上曲面上的散射微结构， 所述散射微结构 的位置与 LED光强分布中亮环的位置相对应， 对经所述第一上曲面和第二上 曲面射出形成亮环的光线进行散射， 从而可以在不改变 LED发光芯片光线主 要前进方向的前提下，对其形成亮环位置的光线进行轻微散射，使得各个出射 角度的光线进行混合， 降低所述 LED光源亮环位置处的光强， 提高所述 LED 光源暗环位置处的光强， 提高所述 LED光源照射面上的光强分布的均匀度。
本说明书中各个部分釆用递进的方式描述，每个部分重点说明的都是与其 他部分的不同之处， 各个部分之间相同相似部分互相参见即可。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本 发明。 对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见 的， 本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在 其它实施例中实现。 因此， 本发明将不会被限制于本文所示的实施例， 而是要 符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims

权 利 要 求
1、 一种 LED透镜， 包括：
入射面， 所述入射面包括： 位于所述 LED透镜中心的中心曲面以及位于 所述中心曲面四周， 与所述中心曲面相连接的底面；
出射面， 所述出射面包括： 与所述底面垂直连接的侧面， 与所述侧面相连 接的第一上曲面和第二上曲面， 所述第一上曲面和第二上曲面相连接，且关于 所述 LED透镜的轴线对称；
其特征在于， 还包括：
位于所述第一上曲面和第二上曲面上的散射微结构，所述散射微结构的位 置与 LED光强分布中亮环的位置相对应， 对经所述第一上曲面和第二上曲面 射出形成亮环的光线进行散射。
2、 根据权利要求 1所述的 LED透镜， 其特征在于， 所述散射微结构还位 于所述侧面与所述底面之间的夹角在 60° -90° 范围的区域内， 包括端点值。
3、 根据权利要求 1或 2所述的 LED透镜， 其特征在于， 所述散射微结构 为平行于所述底面的环状结构。
4、 根据权利要求 3所述的 LED透镜， 其特征在于， 相邻散射微结构在所 述底面上的投影首尾相接。
5、 根据权利要求 4所述的 LED透镜， 其特征在于， 所述散射微结构两端 之间的距离为 0 μ πι-100 μ πι, 不包括左端点值。
6、 根据权利要求 5所述的 LED透镜， 其特征在于， 所述散射微结构为轴 对称结构。
7、 根据权利要求 1所述的 LED透镜， 其特征在于， 所述 LED透镜的制 作工艺为注塑工艺。
8、 一种 LED光源， 其特征在于， 包括：
LED发光芯片以及权利要求 1-7任一项所述的 LED透镜，其中，所述 LED 发光芯片位于所述 LED透镜的中心曲面与所述 LED透镜的底面所形成的腔体 内，且所述 LED透镜中散射微结构的位置与 LED发光芯片的光强分布中亮环 的位置相对应。
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CN103335276A (zh) * 2013-07-26 2013-10-02 苏州东山精密制造股份有限公司 一种led路灯透镜及led路灯系统
CN204042747U (zh) * 2014-06-19 2014-12-24 苏州东山精密制造股份有限公司 Led透镜及包括该led透镜的led光源

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CN106291896A (zh) * 2015-06-05 2017-01-04 瑞仪光电(苏州)有限公司 光学透镜、背光模块
CN106291896B (zh) * 2015-06-05 2019-12-20 瑞仪光电(苏州)有限公司 光学透镜、背光模块
CN109140387A (zh) * 2017-06-14 2019-01-04 富晋精密工业（晋城）有限公司 光学透镜

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