CN202371634U - homogeneous lens - Google Patents

Abstract

Translated fromChinese

本实用新型涉及一种均光透镜，用于一光源，均光透镜包含一导光本体与一反射体，导光本体具有一侧面、一入光面与一出光面，入光面设有一容置槽，出光面设有一锥形槽，反射体设于侧面。当光源发射一光线时，光线由容置槽的第一侧壁折射至锥形槽的第二侧壁，光线再由第二侧壁全反射至侧面，并且由反射体将光线反射至第二侧壁，然后由第二侧壁折射而穿出导光本体。如此可让光源之光线向外扩散，可有效的提升光源的使用效率。

The utility model relates to a light-homogenizing lens, which is used for a light source. The light-homogenizing lens comprises a light-guiding body and a reflector. The light-guiding body has a side surface, a light-entering surface and a light-emitting surface. The light-entering surface is provided with a receiving groove, the light-emitting surface is provided with a conical groove, and the reflector is provided on the side surface. When the light source emits a light, the light is refracted from the first side wall of the receiving groove to the second side wall of the conical groove, and the light is then totally reflected from the second side wall to the side surface, and the light is reflected from the reflector to the second side wall, and then refracted from the second side wall to pass through the light-guiding body. In this way, the light of the light source can be diffused outward, which can effectively improve the use efficiency of the light source.

Description

Translated fromChinese

均光透镜homogeneous lens

技术领域：Technical field:

本实用新型关于一种均光透镜，特别是一种具有全反射效果之均光透镜。The utility model relates to a uniform light lens, in particular to a uniform light lens with total reflection effect.

背景技术：Background technique:

照明设备为生活中不可或缺，而随着技术的发展，具有更好照度及更省电的照明工具也逐渐应运而生。目前最常使用的照明光源为发光二极管(Light-Emitting Diode，LED)。发光二极管为一种半导体组件，发光二极管具有省电、耐用、低发热量及环保等多项优点，所产生之光源为冷光源，具有使用寿命长、低功率消耗及无产生紫外线辐射的特点，因此，发光二极管逐渐地逐步取代传统光源的应用。Lighting equipment is indispensable in life, and with the development of technology, lighting tools with better illuminance and more energy-saving are gradually emerging as the times require. Currently, the most commonly used lighting source is a light-emitting diode (Light-Emitting Diode, LED). Light-emitting diode is a semiconductor component. Light-emitting diode has many advantages such as power saving, durability, low calorific value and environmental protection. The light source produced is a cold light source, which has the characteristics of long service life, low power consumption and no ultraviolet radiation. Therefore, light-emitting diodes gradually replace the application of traditional light sources.

由于上述的发光二极管特性，各国政府皆大力推荐使用发光二极管灯具改良结构来取代传统耗电能的钨丝灯泡。尤其在提倡「节能减碳」的倡导诉求下，发光二极管的省电优越性便开始受到重视。在石化能源日渐短缺与环保意识高涨的今日，善用发光二极管已经是各界关切的焦点，因此坊间各种发光二极管照明设备如雨后春笋般推陈出新。Due to the above characteristics of LEDs, governments of various countries strongly recommend the use of improved structures of LED lamps to replace traditional power-consuming tungsten bulbs. Especially under the advocacy of "energy saving and carbon reduction", the power saving advantages of light emitting diodes have begun to be valued. Today, with the increasing shortage of petrochemical energy and the rising awareness of environmental protection, making good use of LEDs has become the focus of concern from all walks of life. Therefore, various LED lighting equipment in the market have sprung up like mushrooms to introduce new ones.

过去由于发光二极管之亮度还无法取代传统之照明光源，但随着技术领域之不断提升，目前已研发出高照明辉度之发光二极管(高功率LED)，其足以取代传统之照明光源。然而，发光二极管由于发光面积小，所发出之光源趋近为点状光源，故当发光二极管做为一般光源输出时，其光源会有输出不均匀之情况发生，尤其需要在短距离内就达到均匀亮度之光源的应用，将会使发光二极管之使用受到限制。In the past, the brightness of light-emitting diodes could not replace traditional lighting sources, but with the continuous improvement of the technical field, light-emitting diodes (high-power LEDs) with high lighting brightness have been developed, which can replace traditional lighting sources. However, due to the small light-emitting area of the light-emitting diode, the light emitted by the light-emitting diode tends to be a point light source. Therefore, when the light-emitting diode is used as a general light source, the output of the light source will be uneven, especially in a short distance. The application of a light source with uniform brightness will limit the use of light-emitting diodes.

目前习知技术已开始使用一导光组件将发光二极管所发出的光线予以导引并且扩散，使发光二极管的不均匀光输出收敛在一定区域范围内，使其达到局部区域内较为均匀的光源输出。然而，目前所见的导光组件之出光面中心向外之亮度将大幅度的衰减，并不能有效且均匀的扩散发光二极管所射出的光线。故，利用目前习用的导光组件对发光二极管进行光学改善，依旧无法彻底的解决光线分布不均匀之问题。At present, the known technology has begun to use a light guide component to guide and diffuse the light emitted by the LED, so that the uneven light output of the LED converges within a certain area, so that it can achieve a relatively uniform light output in a local area. . However, the luminance from the center of the light emitting surface of the currently seen light guide component will be greatly attenuated, which cannot effectively and uniformly diffuse the light emitted by the light emitting diode. Therefore, the optical improvement of light-emitting diodes by using the commonly used light guide components still cannot completely solve the problem of uneven light distribution.

发明内容：Invention content:

鉴于以上的问题，本实用新型提供一种均光透镜，为使发光二极管之光线得以均匀扩散，解决习用导光组件之出光面中心向外的亮度大幅度衰减之问题。In view of the above problems, the utility model provides a uniform light lens, in order to make the light of the light emitting diodes diffuse evenly, and solve the problem that the brightness of the center of the light-emitting surface of the conventional light guide component is greatly attenuated outward.

本实用新型之均光透镜，适用于一光源，均光透镜包含一导光本体与一反射体，导光本体具有环绕之一侧面，以及相对之一入光面与一出光面，其中侧面介于入光面与出光面之间，且侧面分别与入光面与出光面相衔接，而反射体环设于侧面。入光面设有一容置槽，容置槽具有一第一侧壁，出光面设有一锥形槽，锥形槽具有一第二侧壁。光源邻近于入光面并发射一光线，光线穿过第一侧壁折射至导光本体内，且光线传递至该第二侧壁，光线再由第二侧壁以全反射方式将光线传递至侧面，光线由侧面之反射体反射至第二侧壁，最后光线穿透第二侧壁以自出光面射出。The uniform light lens of the utility model is suitable for a light source. The light uniform lens includes a light guide body and a reflector. The light guide body has a surrounding side surface, and a light incident surface and a light exit surface opposite to each other. Between the light-incident surface and the light-exit surface, and the side surfaces are connected with the light-incidence surface and the light-exit surface respectively, and the reflector ring is arranged on the side surface. The light-incident surface is provided with an accommodating groove, and the accommodating groove has a first side wall; the light-emitting surface is provided with a tapered groove, and the tapered groove has a second side wall. The light source is adjacent to the light incident surface and emits a light, the light passes through the first side wall and is refracted into the light guide body, and the light is transmitted to the second side wall, and then the light is transmitted to the On the side, the light is reflected by the side reflector to the second side wall, and finally the light passes through the second side wall to be emitted from the light-emitting surface.

本实用新型另公开一种均光透镜，包含一导光本体及一反射体，导光本体具有环绕之一侧面及相对之一入光面与一出光面，侧面介于入光面与出光面之间，且侧面分别与入光面与出光面相衔接，入光面设有一容置槽，出光面设有一锥形槽，反射体环设于侧面，光线由第二侧壁反射至反射体，光线再由反射体反射至第二侧壁，光线再折射而自出光面射出。The utility model also discloses a uniform light lens, which includes a light guide body and a reflector. The light guide body has a surrounding side surface and an opposite light incident surface and a light exit surface. The side is between the light incident surface and the light exit surface. between, and the side faces are respectively connected with the light incident surface and the light exit surface, the light incident surface is provided with an accommodating groove, the light exit surface is provided with a tapered groove, the reflector ring is provided on the side, the light is reflected from the second side wall to the reflector, The light is reflected by the reflector to the second side wall, refracted and emitted from the light exit surface.

容置槽具有以一第一函数形成y＝L₁(x)之一第一侧壁，锥形槽具有以一第二函数y＝L₂(x)形成之一第二侧壁，光源以一距离d邻近于入光面并发射一光线，光源之边长为L，光线以一第一折射率n₁之一第一入射角α₁穿过第一侧壁，光线以导光本体之一第二折射率n₂之一折射角α₂折射至第二侧壁，第一入射角α₁与折射角α₂之一第一法线与导光本体之一中心轴具有一第一夹角θ₁，第一法线与第一函数之交点具有一坐标(x₁，y₁)，光线由第二侧壁之一第二入射角β₁反射，第二入射角β₁之一第二法线与导光本体之一中心轴具有一第二夹角θ₂，其中，β₁＝tan^-1[L1’(x₁)]+sin^-1{(n₁/n₂)sin*-[tan^-1[(L/2+x₁)/(d+y₁]+tan^-1[L₁’(x₁)]]}-tan^-1[L₂’(x₂)]。The accommodating groove has a first side wall formed by a first function y=L₁ (x), the tapered groove has a second side wall formed by a second function y=L₂ (x), and the light source is formed by A distance d is adjacent to the light incident surface and emits a light. The side length of the light source is L. The light passes through the first side wall at a first incident angle_{α1 with a first refractive index n1.} The light passes through the light guide body A refraction angle_α2 of the second refraction index n2 is refracted to the second side wall, and a first normal line between the first incident angle_α1 and_the refraction angle_α2 and a central axis of the light guide body have a first clip Angle θ₁ , the intersection of the first normal line and the first function has a coordinate (x₁ , y₁ ), the light is reflected by the second incident angle β₁ of the second side wall, and the second incident angle β₁ is the first There is a second included angle θ₂ between the two normals and a central axis of the light guide body, where β₁ =tan^-1 [L1'(x₁ )]+sin^-1 {(n₁ /n₂ )sin* -[tan^-1 [(L/2+x₁ )/(d+y₁ ]+tan^-1 [L₁ '(x₁ )]]} -tan^-1 [L₂ '(x₂ )].

本实用新型之功效在于，由容置槽之第一侧壁与锥形槽之第二侧壁之斜率的相互配合设计，使得光源所产生的光线由第一侧壁折射至第二侧壁后，光线会由第二侧壁全反射至侧面而向外扩散，以达均光之效果，且藉由第二侧壁全反射有效降低光能量的耗损，并且藉由侧面之反射体以让光线再反射至第二侧壁而穿出导光本体，更提升光源的使用效率。The effect of the utility model lies in that the slope of the first side wall of the accommodating groove and the slope of the second side wall of the tapered groove are mutually matched so that the light generated by the light source is refracted from the first side wall to the back of the second side wall. , the light will be totally reflected from the second side wall to the side and spread out to achieve the effect of light uniformity, and the total reflection of the second side wall can effectively reduce the loss of light energy, and the light can be let through the reflector on the side Then reflect to the second side wall and pass through the light guide body, further improving the use efficiency of the light source.

有关本实用新型的特征、实作与功效，兹配合图式作最佳实施例详细说明如下。Regarding the features, implementation and effects of the present utility model, the best embodiment is described in detail below in conjunction with the drawings.

附图说明：Description of drawings:

图1A为本实用新型第一较佳实施例之均光透镜之立体示意图。FIG. 1A is a three-dimensional schematic diagram of a uniform light lens according to a first preferred embodiment of the present invention.

图1B为本实用新型第一较佳实施例之均光透镜之侧视示意图。FIG. 1B is a schematic side view of the uniform light lens of the first preferred embodiment of the present invention.

图1C为本实用新型第一较佳实施例之均光透镜之俯视示意图。Fig. 1C is a schematic top view of the uniform light lens of the first preferred embodiment of the present invention.

图1D为图1C之A-A方向剖面示意图。FIG. 1D is a schematic cross-sectional view along the line A-A of FIG. 1C .

图2A为本实用新型第一较佳实施例之光路径示意图。FIG. 2A is a schematic diagram of the light path of the first preferred embodiment of the present invention.

图2B为本实用新型第一较佳实施例之法线角度关系图。Fig. 2B is a diagram of the normal angle relationship of the first preferred embodiment of the present invention.

图2C为图2A之局部放大示意图。FIG. 2C is a partially enlarged schematic diagram of FIG. 2A .

图2D为本实用新型第一较佳实施例之第一侧壁的局部放大示意图。2D is a partially enlarged schematic view of the first side wall of the first preferred embodiment of the present invention.

图3为本实用新型第二较佳实施例之导光本体的剖面示意图。Fig. 3 is a schematic cross-sectional view of the light guide body of the second preferred embodiment of the present invention.

图4为本实用新型第三较佳实施例之导光本体的侧视示意图。FIG. 4 is a schematic side view of a light guide body according to a third preferred embodiment of the present invention.

具体实施方式：Detailed ways:

请参阅图1A至图1D，其为本实用新型第一较佳实施例之均光透镜之立体示意图、侧视示意图、俯视示意图与图1C之A-A方向剖面示意图。Please refer to FIG. 1A to FIG. 1D , which are the three-dimensional schematic view, the side view schematic view, the top view schematic view and the A-A direction sectional schematic view of FIG. 1C of the uniform light lens of the first preferred embodiment of the present invention.

如图所示，本实用新型第一较佳实施例之均光透镜用于一光源200，本实用新型之光源200为发光二极管，且发光二极管由侧边发光，熟悉此项技术之人员可依照实际使用需求，而对应改变光源200的种类，并不以此为限。As shown in the figure, the uniform light lens of the first preferred embodiment of the utility model is used for alight source 200. Thelight source 200 of the utility model is a light emitting diode, and the light emitting diode emits light from the side. The type of thelight source 200 should be changed according to the actual usage requirement, and it is not limited thereto.

本实施例之均光透镜包含一导光本体100及一反射体300，其中导光本体100之材料可为一压克力或是玻璃等有机透光物质，让光源200之光线可于均光透镜内折射而扩散。导光本体100具有相对之一入光面102与一出光面104及环绕之一侧面106，侧面106介于入光面102与出光面104之间，且侧面106的边缘分别与入光面102与出光面104的边缘相衔接，光源200则设置邻近于入光面102之位置。The uniform light lens of this embodiment includes alight guide body 100 and areflector 300, wherein the material of thelight guide body 100 can be an organic light-transmitting material such as acrylic or glass, so that the light from thelight source 200 can be uniformly lighted. Diffusion due to refraction within the lens. Thelight guide body 100 has an oppositelight incident surface 102 and alight exit surface 104 and asurrounding side surface 106. Theside surface 106 is between thelight incident surface 102 and thelight exit surface 104, and the edges of the side surfaces 106 are respectively connected to thelight incident surface 102. Connecting with the edge of the light-emittingsurface 104 , thelight source 200 is disposed adjacent to the light-incident surface 102 .

入光面102设有一容置槽110，容置槽110具有一第一侧壁112，容置槽110可为锥形，锥形端点的朝向出光面104，故容置槽110的剖面形状为一三角形，三角形之底部位于入光面102位置。出光面104设有一锥形槽120，锥形槽120的端点的朝向入光面102，出光面104之锥形槽120具有一第二侧壁122。由于容置槽110为锥形，锥形的端点的朝向出光面104，因此大部分的光线将穿过第一侧壁112后将向上传递至第二侧壁122，第二侧壁122将光线全反射之导光本体100之侧面106。反射体300环设于导光本体100之侧面106，Thelight incident surface 102 is provided with anaccommodating groove 110, theaccommodating groove 110 has afirst side wall 112, theaccommodating groove 110 can be tapered, and the end of the taper faces thelight emitting surface 104, so the cross-sectional shape of theaccommodating groove 110 is A triangle, the bottom of the triangle is located at the position of thelight incident surface 102 . Thelight emitting surface 104 is provided with atapered groove 120 , the end of the taperedgroove 120 faces thelight incident surface 102 , and the taperedgroove 120 of thelight emitting surface 104 has asecond side wall 122 . Since theaccommodating groove 110 is tapered, and the end point of the tapered face is towards the light-emittingsurface 104, most of the light will pass through thefirst side wall 112 and then be transmitted upwards to thesecond side wall 122, and thesecond side wall 122 will transmit the light Theside surface 106 of thelight guide body 100 is totally reflected. Thereflector 300 is arranged around theside surface 106 of thelight guide body 100,

当光源200发射一光线时，光线会在穿透第一侧壁112，并且于导光本体100内进行折射扩散，之后光线将于第二侧壁122产生全反射，使光线完全反射至导光本体100之侧面106。接着，光线将在侧面106由反射体300反射，使光线反射至第二侧壁122，最后光线再由第二侧壁122折射而穿出导光本体100。When thelight source 200 emits a light, the light will pass through thefirst side wall 112, and will be refracted and diffused in thelight guide body 100, and then the light will be totally reflected by thesecond side wall 122, so that the light is completely reflected to the light guide Theside surface 106 of thebody 100 . Then, the light is reflected by thereflector 300 on theside surface 106 , so that the light is reflected to thesecond side wall 122 , and finally the light is refracted by thesecond side wall 122 to pass through thelight guide body 100 .

另外，当光线在导光本体100内传递时，光线将在第二侧壁122产生全反射作用，使光线由第二侧壁122反射至侧面106。此时，光线因为全反射的缘故，因此光线能量衰减较少，故光线可传递较远，如此可让光线于导光本体100内扩散较远。In addition, when the light is transmitted in thelight guide body 100 , the light will be totally reflected on thesecond side wall 122 , so that the light is reflected from thesecond side wall 122 to theside surface 106 . At this time, due to the total reflection of the light, the energy of the light is less attenuated, so the light can be transmitted farther, so that the light can spread farther in thelight guide body 100 .

光源200所发出的光线最后将由导光本体100之侧面106所设置的反射体300反射，之后光线再传递至第二侧壁122，以一角度入射于第二侧壁122，最后经由第二侧壁122折射后穿出导光本体100，如此光线则会发散出去。如此可让光线以更较广的范围扩散，以有效的提升光源200的使用效率。The light emitted by thelight source 200 is finally reflected by thereflector 300 provided on theside surface 106 of thelight guide body 100, and then the light is transmitted to thesecond side wall 122, incident on thesecond side wall 122 at an angle, and finally passes through the second side wall Thewall 122 passes through thelight guide body 100 after being refracted, so that the light is diverged. In this way, the light can be diffused in a wider range, so as to effectively improve the use efficiency of thelight source 200 .

请参阅图2A，其为本实用新型第一较佳实施例之光路径示意图。如图所示，本实用新型之导光本体100具有一中心轴C，导光本体100之中心底部设为原点o(0，0)，因此中心轴C以及为坐标轴之Y轴，而导光本体100底部的水平线亦即为X轴。Please refer to FIG. 2A , which is a schematic diagram of the light path of the first preferred embodiment of the present invention. As shown in the figure, thelight guide body 100 of the present invention has a central axis C, and the center bottom of thelight guide body 100 is set as the origin o(0,0), so the central axis C and the Y axis are the coordinate axes, and the guide The horizontal line at the bottom of thelight body 100 is also the X axis.

光源200为边长长度L之发光二极管，光源200之中心位于导光本体100下方一距离d的位置。当光源200发射光线至第一侧壁112时，光线于第一侧壁112产生一交点A(x₁，y₁)，而光线将穿过第一侧壁112而折射。第一侧壁112由一函数方程式y＝L₁(x)所形成，而在A(x₁，y₁)具有一第一法线N₁、一第一入射角α₁与一折射角α₂，第一法线N₁与中心轴C的夹角为θ₁，空气的之折射率为第一折射率n₁，导光本体100之折射率为第二折射率n₂。Thelight source 200 is a light emitting diode with a side length L, and the center of thelight source 200 is located at a distance d below thelight guide body 100 . When thelight source 200 emits light to thefirst side wall 112 , the light generates an intersection A(x₁ , y₁ ) on thefirst side wall 112 , and the light passes through thefirst side wall 112 to be refracted. Thefirst side wall 112 is formed by a function equation y=L₁ (x), and has a first normal N₁ , a first incident angle α₁ and a refraction angle α at A(x₁ , y₁ )._2. The angle between the first normal N₁ and the central axis C is θ₁ , the refractive index of air is the first refractive index n₁ , and the refractive index of thelight guide body 100 is the second refractive index n₂ .

光线由第一侧壁112折射后，光线以一第二入射角β₁传递至第二侧壁122，光线于第二侧壁122产生一交点B(x₂，y₂)，第二侧壁122由一函数方程式y＝L₂(x)所形成，而在B(x₂，y₂)具有一第二法线N₂，第二法线N₂与中心轴C的夹角为θ₂，光线于交点B产生一反射角β₂，并且将光线传递至导光本体100之侧面106，再经由反射体300将光线反射。反射后的光线将穿过第二侧壁122，再由第二侧壁122折射后发出。After the light is refracted by thefirst side wall 112, the light is transmitted to thesecond side wall 122 at a second incident angle_β1 , and the light generates an intersection B(x₂ , y₂ ) on thesecond side wall 122, and thesecond side wall 122 is formed by a functional equation y=L₂ (x), and there is a second normal N₂ at B(x₂ , y₂ ), and the included angle between the second normal N₂ and the central axis C is θ₂ , the light generates a reflection angle β₂ at the intersection B, and transmits the light to theside surface 106 of thelight guide body 100 , and then reflects the light through thereflector 300 . The reflected light passes through thesecond side wall 122 and is refracted by thesecond side wall 122 before being emitted.

而当光线在第一侧壁112折射时，依据司乃尔定律，可得知：And when light is refracted on thefirst side wall 112, according to Snell's law, it can be known that:

n₁sinα₁＝n₂sinα₂，故可得知α₂＝sin^-1[(n₁/n₂)sinα₁]。n₁ sinα₁ =n₂ sinα₂ , so it can be known that α₂ =sin^-1 [(n₁ /n₂ )sinα₁ ].

请一并参阅图2B，其为本实用新型第一较佳实施例之法线角度关系图。由图2A可知，本实用新型之第一法线N₁与中心轴C的夹角为θ₁，第二法线N₂与中心轴C的夹角为θ₂，将θ₁、θ₂与中心轴C并列，再将由第一侧壁112折射的光线一同并列，如图2B所示，此图如同将A点与B点重迭。折射的光线与第一法线N₁的夹角亦即为折射角α₂，折射的光线与第二法线N₂的夹角亦即为第二入射角β₁。而第一法线N₁与第二法线N₂的夹角为θ₃，θ₃的数值为θ₁与θ₂之和。Please also refer to FIG. 2B , which is a diagram of the normal angle relationship of the first preferred embodiment of the present invention. It can be seen from Fig. 2A that the included angle between the first normal line N₁ and the central axis C of the utility model is θ₁ , the included angle between the second normal line N₂ and the central axis C is θ₂ , and θ₁ , θ₂ and The central axes C are juxtaposed, and the light rays refracted by thefirst side wall 112 are juxtaposed together, as shown in FIG. 2B , which is like overlapping points A and B in this figure. The angle between the refracted light and the first normal N₁ is the refraction angle α₂ , and the angle between the refracted light and the second normal N₂ is the second incident angle β₁ . The angle between the first normal N₁ and the second normal N₂ is θ₃ , and the value of θ₃ is the sum of θ₁ and θ₂ .

因此，β₁的数值为α₂加上θ₃，亦即β₁的数值为α₂、θ₁与θ₂的数值之和，亦即β₁＝θ₁+θ₂+α₂。而再考虑角度方向性的情形下，α₂和β₁以第一法线N₁与第二法线N₂为正负号的起始线，θ₁和θ₂以垂直线为正负号的起始线，而顺时针方向为负，逆时针方向为正，则β₁为负，α₂为负，θ₁为负，θ₂为正。因此(-β₁)＝(-θ₁)+(θ₂)+(-α₂)，亦即β₁＝θ₁-θ₂+α₂。Therefore, the value of β₁ is α₂ plus θ₃ , that is, the value of β₁ is the sum of the values of α₂ , θ₁ and θ₂ , that is, β₁ =θ₁ +θ₂ +α₂ . In the case of angular directivity, α₂ and β₁ take the first normal line N₁ and the second normal line N₂ as the starting line of the sign, and θ₁ and θ₂ use the vertical line as the sign of the starting line , and the clockwise direction is negative and the counterclockwise direction is positive, then β₁ is negative, α₂ is negative, θ₁ is negative, and θ₂ is positive. Therefore (-β₁ )=(-θ₁ )+(θ₂ )+(-α₂ ), that is, β₁ =θ₁ -θ₂ +α₂ .

请一并参阅图2C，其为图2A之局部放大图。由图1A示可知，光源200的长度为L，光源200之中心位于导光本体100下方一距离d的位置。由光源200发出之入射之光线在交点A与第一法线N₁的夹角为第一入射角α₁，而光源200发出之入射之光线在交点A与交点A垂直线的夹角为γ，垂直线平行于中心轴C，垂直线与第一法线N₁的夹角为为θ₁。由图示可知，tanγ＝[(L/2+x₁)/(d+y₁)]，γ＝tan^-1[(L/2+x₁)/(d+y₁)]。另外，由图2C示可知，数值γ＝数值α₁+数值θ₁，而数值α₁＝数值γ-数值θ₁，而再考虑角度方向性的情形下，若以第一法线N₁为判断角度正负号的起始线，而顺时针方向为负，逆时针方向为正，α₁为负，θ₁为负，则(-α₁)＝γ-(-θ₁)，α₁＝-(γ+θ₁)。亦即α₁＝-[tan^-1[(L/2+x₁)/(d+y₁)]+θ₁]。Please also refer to FIG. 2C , which is a partially enlarged view of FIG. 2A . As can be seen from FIG. 1A , the length of thelight source 200 is L, and the center of thelight source 200 is located at a distance d below thelight guide body 100 . The angle between the incident light emitted by thelight source 200 at the intersection A and the first normal N₁ is the first incident angle α₁ , and the angle between the incident light emitted by thelight source 200 at the intersection A and the vertical line at the intersection A is γ , the vertical line is parallel to the central axis C, and the angle between the vertical line and the first normal line N₁ is θ₁ . It can be seen from the figure that tanγ=[(L/2+x₁ )/(d+y₁ )], γ=tan^-1 [(L/2+x₁ )/(d+y₁ )]. In addition, it can be seen from Fig. 2C that the value γ = value α₁ + value θ₁ , and value α₁ = value γ - value θ₁ , and considering the angular directivity, if the first normal line N₁ is Determine the starting line of the sign of the angle, and the clockwise direction is negative, the counterclockwise direction is positive, α₁ is negative, and θ₁ is negative, then (-α₁ )=γ-(-θ₁ ), α₁ =-(γ+θ₁ ). That is, α₁ =−[tan⁻¹ [(L/2+x₁ )/(d+y₁ )]+θ₁ ].

请一并参阅图2D，其为本实用新型较佳实施例之第一侧壁112的部分曲线示意图。此图为图2A的局部示意图。由图2A可知，光源200所发之入射光线于第一侧壁112产生交点A(x₁，y₁)，而且光线将穿过第一侧壁112而折射，第一侧壁112之函数方程式y＝L₁(x)，而在A(x₁，y₁)具有第一法线N₁，入射光线与第一法线N₁之夹角为第一入射角α₁，而折射光线与第一法线N₁之夹角为折射角α₂，第一法线N₁与中心轴C的夹角为θ₁。Please also refer to FIG. 2D , which is a partial curve diagram of thefirst side wall 112 in a preferred embodiment of the present invention. This figure is a partial schematic diagram of FIG. 2A. It can be seen from FIG. 2A that the incident light emitted by thelight source 200 produces an intersection point A(x₁ , y₁ ) on thefirst side wall 112, and the light will pass through thefirst side wall 112 and be refracted. The functional equation of the first side wall 112 y=L₁ (x), and A(x₁ , y₁ ) has the first normal N₁ , the angle between the incident ray and the first normal N₁ is the first incident angle α₁ , and the refracted ray and The included angle between the first normal N₁ is the refraction angle α₂ , and the included angle between the first normal N₁ and the central axis C is θ₁ .

方程式y＝L₁(x)在交点A(X₁，y₁)的一切线T之方程式为L₁’(x₁)。切线T与第一法线N₁相互垂直，故由图示可知，切线T与X轴的夹角亦为θ₁。θ₁为切线T与X轴的夹角，而切线T的斜率为tanθ₁，因此tanθ₁＝L₁’(x₁)，故θ₁＝tan^-1[L₁’(x₁)]。同理可知，θ₂＝tan^-1[L₂’(x₂)]。故，综合图2A至图2D可知：The equation of the tangent line T of the equation y=L₁ (x) at the intersection point A (X₁ , y₁ ) is L₁ '(x₁ ). The tangent T and the first normal N₁ are perpendicular to each other, so it can be seen from the figure that the angle between the tangent T and the X-axis is also θ₁ . θ₁ is the angle between the tangent line T and the X axis, and the slope of the tangent line T is tanθ₁ , so tanθ₁ =L₁ '(x₁ ), so θ₁ =tan^-1 [L₁ '(x₁ )]. Similarly, it can be seen that θ₂ =tan^-1 [L₂ '(x₂ )]. Therefore, it can be seen from Figure 2A to Figure 2D that:

β₁＝θ₁-θ₂+α₂β₁ = θ₁ - θ₂ + α₂

   ＝θ₁-θ₂+sin^-1[(n₁/n₂)sinα₁]＝θ₁ -θ₂ +sin^-1 [(n₁ /n₂ )sinα₁ ]

   ＝tan^-1[L₁’(x₁)]+sin^-1{(n₁/n₂)sin*-[tan^-1[(L/2+x₁)/(d+y₁)]+tan^-1[L₁’(x₁)]]}-tan^-1[L₂’(x₂)]。＝tan^-1 [L₁ '(x₁ )]+sin^-1 {(n₁ /n₂ )sin*-[tan^-1 [(L/2+x₁ )/(d+y₁ )]+ tan^-1 [L₁ '(x₁ )]]} - tan^-1 [L₂ '(x₂ )].

当β₁大于等于均光透镜的临界角θ_c时，可形成全反射，若均光透镜的材料以PMMA为例，PMMA的折射率为n₂＝1.4935，而空气的折射率为1，故可知以PMMA均光透镜的临界角θ_c约为42.034度，意即β₁大于42.034度时将产生全反射。When β₁ is greater than or equal to the critical angle θ_c of the homogeneous lens, total reflection can be formed. If the material of the homogeneous lens is PMMA as an example, the refractive index of PMMA is n₂ =1.4935, while the refractive index of air is 1, so It can be seen that the critical angle θ_c of the PMMA uniform light lens is about 42.034 degrees, which means that total reflection will occur when β₁ is greater than 42.034 degrees.

本实用新型据此设计第一侧壁112与第二侧壁122之函数方程式，可让光线于由第一侧壁112发射至第二侧壁122时可产生全反射，如此不但可让光源之光线向外扩散，更可避免向外扩散之光线能量衰减太快，如此可有效的提升光源的使用效率。The utility model designs the functional equations of thefirst side wall 112 and thesecond side wall 122 accordingly, so that light can be totally reflected when it is emitted from thefirst side wall 112 to thesecond side wall 122, so that not only can the light source The outward diffusion of the light can prevent the energy of the outwardly diffused light from attenuating too quickly, which can effectively improve the efficiency of the light source.

请一并参阅图3，其为本实用新型第二较佳实施例之导光本体100的剖面示意图。此实施例不同于第一实施例在于容置槽110之剖面形状的不同。Please also refer to FIG. 3 , which is a schematic cross-sectional view of alight guide body 100 according to a second preferred embodiment of the present invention. This embodiment is different from the first embodiment in that the cross-sectional shape of theaccommodating groove 110 is different.

本实施例之容置槽110之剖面形状为一梯形，梯形具有一上底与一下底，下底位于入光面102，下底大于上底。由本实施例对照第一实施例来看，两实施例的第一侧壁112斜率皆相同，仅容置槽110底部面积大小之差异。而改变容置槽110底部面积则会影响导光本体100中间亮度的差异，故本创作可依据实际需求而设置容置槽110底部面积。The cross-sectional shape of theaccommodating groove 110 in this embodiment is a trapezoid, the trapezoid has an upper base and a lower base, the lower base is located on thelight incident surface 102 , and the lower base is larger than the upper base. Comparing this embodiment with the first embodiment, the slopes of thefirst side walls 112 of the two embodiments are the same, and only the area of the bottom of theaccommodating groove 110 is different. Changing the area of the bottom of theaccommodating groove 110 will affect the difference in brightness between thelight guide body 100 , so the present invention can set the area of the bottom of theaccommodating groove 110 according to actual needs.

请一并参阅图4，其为本实用新型第三较佳实施例之导光本体100的侧视图。如图所示，本实用新型更包含复数个固定柱130，设于导光本体100之底部，此实施例以三个固定柱130为范例做说明。Please also refer to FIG. 4 , which is a side view of alight guide body 100 according to a third preferred embodiment of the present invention. As shown in the figure, the present invention further includes a plurality of fixingposts 130 disposed at the bottom of thelight guide body 100 . This embodiment uses three fixingposts 130 as an example for illustration.

固定柱130用于抵设于光源200的周围，使光源200与导光本体100之间产生有一间距，如此可让光源200具有一散热空间，并且让光线发射之第一侧壁112时，具有较为良好的入射角，故可让本实用新型之均光透镜能更有效的利用光源200。另外，固定柱130的高度可因实际设计需求对应进行调整。The fixingcolumn 130 is used to abut against the surrounding of thelight source 200, so that there is a distance between thelight source 200 and thelight guide body 100, so that thelight source 200 has a heat dissipation space, and thefirst side wall 112 that allows the light to emit has a The relatively good incident angle allows the uniform light lens of the present invention to utilize thelight source 200 more effectively. In addition, the height of the fixingcolumn 130 can be adjusted correspondingly according to actual design requirements.

综上所述，本实用新型之均光透镜藉由容置槽之第一侧壁与锥形槽之第二侧壁之斜率的相互配合设计，使入射光线于第二侧壁产生全反射，并藉由反射体的反射，让光线可由导光本体中心向外扩散，并且藉由第二侧壁的全反射以减少光线扩散后能量的衰减，如此可均匀的将光线扩散，故可提升光源的使用效率。To sum up, the homogeneous lens of the present invention is designed through the cooperation of the slope of the first side wall of the accommodation groove and the slope of the second side wall of the tapered groove, so that the incident light is totally reflected on the second side wall, And through the reflection of the reflector, the light can be diffused outward from the center of the light guide body, and the energy attenuation after light diffusion can be reduced by the total reflection of the second side wall, so that the light can be evenly diffused, so the light source can be improved usage efficiency.

虽然本实用新型之实施例公开如上所述，然并非用以限定本实用新型，任何熟习相关技艺者，在不脱离本实用新型之精神和范围内，举凡依本实用新型申请范围所述之形状、构造、特征及数量当可做些许之变更，因此本实用新型之专利保护范围须视本说明书所附之申请专利范围所界定者为准。Although the disclosure of the embodiments of the present utility model is as above, it is not intended to limit the present utility model. Anyone who is familiar with the related art can, without departing from the spirit and scope of the present utility model, take all the shapes described in the application scope of the present utility model Minor changes can be made in terms of structure, features and quantity, so the patent protection scope of the present utility model must be defined in the scope of patent application attached to this specification.

Claims (12)

Translated fromChinese

1.一种均光透镜，适用于一光源，包含：1. A uniform light lens, suitable for a light source, comprising:一导光本体，具有环绕之一侧面及相对之一入光面与一出光面，该侧面介于该入光面与该出光面之间，且该侧面分别与该入光面与该出光面相衔接，该入光面设有一容置槽，该容置槽具有一第一侧壁，该出光面设有一锥形槽，该锥形槽具有一第二侧壁，该光源邻近于该入光面并发射一光线；以及A light guide body has a surrounding side and an opposite light incident surface and a light exit surface. connected, the light-incident surface is provided with an accommodating groove, the accommodating groove has a first side wall, the light-emitting surface is provided with a tapered groove, and the tapered groove has a second side wall, and the light source is adjacent to the light-incident surface and emit a ray; and一反射体，环设于该侧面；A reflector is arranged around the side surface;其中，该光线穿过该第一侧壁并折射至该导光本体内，且该光线传递至该第二侧壁，该第二侧壁全反射该光线至该侧面，该反射体将该光线由该侧面将反射至该第二侧壁，该光线穿透该第二侧壁并自该出光面射出。Wherein, the light passes through the first side wall and is refracted into the light guide body, and the light is transmitted to the second side wall, and the second side wall totally reflects the light to the side, and the reflector takes the light The light is reflected from the side surface to the second side wall, and the light passes through the second side wall and exits from the light-emitting surface.2.如请求项第1项所述之均光透镜，其中该容置槽之剖面形状为一三角形，该三角形之底部位于该入光面。2. The homogeneous lens as described in item 1 of the claim, wherein the cross-sectional shape of the accommodating groove is a triangle, and the bottom of the triangle is located on the light incident surface.3.如请求项第1项所述之均光透镜，其中该容置槽之剖面形状为一梯形，该梯形具有一上底与一下底，该下底重合该入光面，该下底之长度相对大于该上底之长度。3. The homogeneous lens as described in Item 1 of the claim, wherein the cross-sectional shape of the accommodating groove is a trapezoid, the trapezoid has an upper base and a lower base, the lower base overlaps the light-incident surface, and the lower base The length is relatively greater than the length of the upper bottom.4.如请求项第1项所述之均光透镜，更包含复数个固定柱，设于该导光本体上。4. The homogeneous lens as described in item 1 of the claim, further comprising a plurality of fixing posts arranged on the light guiding body.5.一种均光透镜，适用于一光源，包含：5. A uniform light lens, suitable for a light source, comprising:一导光本体，具有环绕之一侧面及相对之一入光面与一出光面，该侧面介于该入光面与该出光面之间，且该侧面分别与该入光面与该出光面相衔接，该入光面设有一容置槽，该容置槽具有以一第一函数形成y＝L₁(x)之一第一侧壁，该出光面设有一锥形槽，该锥形槽具有以一第二函数y＝L₂(x)形成之一第二侧壁，该光源以一距离d邻近于该入光面并发射一光线，该光源之边长为L，该光线以一第一折射率n₁之一第一入射角α₁穿过该第一侧壁，该光线以该导光本体之一第二折射率n₂之一折射角α₂折射至该第二侧壁，该第一入射角α₁与该折射角α₂之一第一法线与该导光本体之一中心轴具有一第一夹角θ₁，该第一法线与该第一函数之交点具有一坐标(x₁，y₁)，该光线由该第二侧壁之一第二入射角β₁反射，该第二入射角β₁之一第二法线与该导光本体之一中心轴具有一第二夹角θ₂；以及A light guide body has a surrounding side and an opposite light incident surface and a light exit surface. connected, the light incident surface is provided with an accommodating groove, the accommodating groove has a first side wall forming y=L₁ (x) by a first function, the light emitting surface is provided with a tapered groove, and the tapered groove There is a second side wall formed by a second function y=L₂ (x), the light source is adjacent to the light incident surface at a distance d and emits a light, the side length of the light source is L, and the light is at a A first incident angle_α1 of the first refractive index_n1 passes through the first sidewall, and the light is refracted to the second sidewall at a refraction angle_α2 of the second refractive index_n2 of the light guide body , the first normal of the first incident angle α₁ and the refraction angle α₂ has a first included angle θ₁ with the central axis of the light guide body, the intersection point of the first normal and the first function With a coordinate (x₁ , y₁ ), the light is reflected by a second incident angle β₁ of the second side wall, and a second normal of the second incident angle β₁ is connected to a center of the light guiding body the axis has a second included angle θ₂ ; and一反射体，环设于该侧面；A reflector is arranged around the side surface;其中，该光线穿过该第一侧壁并折射至该导光本体内，且该光线传递至该第二侧壁，该第二侧壁全反射该光线至该侧面，该反射体将该光线由该侧面将反射至该第二侧壁，该光线穿透该第二侧壁并自该出光面射出；Wherein, the light passes through the first side wall and is refracted into the light guide body, and the light is transmitted to the second side wall, and the second side wall totally reflects the light to the side, and the reflector takes the light The light is reflected from the side surface to the second side wall, and the light passes through the second side wall and exits from the light-emitting surface;其中，in,β₁＝tan^-1[L₁’(x₁)]+sin^-1{(n₁/n₂)sin*-[tan^-1[(L/2+x₁)/(d+y₁)]+tan^-1[L₁’(x₁)]]}-tan^-1[L₂’(x₂)]。β₁ ＝tan^-1 [L₁ '(x₁ )]+sin^-1 {(n₁ /n₂ )sin*-[tan^-1 [(L/2+x₁ )/(d+y₁ ) ]+tan^-1 [L₁ '(x₁ )]]}-tan^-1 [L₂ '(x₂ )].6.如请求项第5项所述之均光透镜，其中该第一夹角θ₁＝tan^-1[L₁’(x₁)]。6. The uniform light lens according to claim item 5, wherein the first included angle θ₁ =tan^-1 [L₁ '(x₁ )].7.如请求项第5项所述之均光透镜，其中该第二夹角θ₂＝tan^-1[L₂’(x₂)]。7. The uniform light lens according to claim item 5, wherein the second included angle θ₂ =tan^-1 [L₂ '(x₂ )].8.如请求项第5项所述之均光透镜，其中该折射角α₂＝sin^-1[(n₁/n₂)sinα₁]。8. The homogeneous lens according to claim 5, wherein the refraction angle α₂ =sin⁻¹ [(n₁ /n₂ )sin α₁ ].9.如请求项第5项所述之均光透镜，其中该第一入射角α₁＝-(γ+θ₁)，γ＝tan^-1[(L/2+x₁)/(d+y₁)]。9. The uniform light lens as described in item 5 of the claim, wherein the first incident angle α₁ =-(γ+θ₁ ), γ=tan^-1 [(L/2+x₁ )/(d+ y₁ )].10.如请求项第5项所述之均光透镜，其中该容置槽之剖面形状为一三角形，该三角形之底部位于该入光面。10. The homogeneous lens as described in item 5 of the claim, wherein the cross-sectional shape of the accommodating groove is a triangle, and the bottom of the triangle is located on the light incident surface.11.如请求项第5项所述之均光透镜，其中该容置槽之剖面形状为一梯形，该梯形具有一上底与一下底，该下底重合该入光面，该下底之长度相对大于该上底之长度。11. The homogeneous lens as described in item 5 of the claim, wherein the cross-sectional shape of the accommodating groove is a trapezoid, the trapezoid has an upper base and a lower base, the lower base overlaps the light-incident surface, and the lower base The length is relatively greater than the length of the upper bottom.12.如请求项第5项所述之均光透镜，更包含复数个固定柱，设于该导光本体上。12. The homogeneous lens as described in item 5 of the claim, further comprising a plurality of fixing posts arranged on the light guiding body.

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