WO2019109895A1 - 一种反射式厚壁光导和照明装置 - Google Patents

一种反射式厚壁光导和照明装置 Download PDF

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WO2019109895A1
WO2019109895A1 PCT/CN2018/119037 CN2018119037W WO2019109895A1 WO 2019109895 A1 WO2019109895 A1 WO 2019109895A1 CN 2018119037 W CN2018119037 W CN 2018119037W WO 2019109895 A1 WO2019109895 A1 WO 2019109895A1
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light
light guide
reflective
walled
thick
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PCT/CN2018/119037
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English (en)
French (fr)
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徐亦雅
徐悦佳
唐树明
施鸿
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常州星宇车灯股份有限公司
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Publication of WO2019109895A1 publication Critical patent/WO2019109895A1/zh

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    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/40—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the combination of reflectors and refractors

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  • the present invention relates to the field of optics, and in particular to a reflective thick-walled light guide and illumination device.
  • the rear position lamp of the automobile mostly adopts a light guiding structure.
  • the advantage of the light guide is that the number of LEDs can be greatly reduced, thereby reducing the price of the entire lamp; the light emitted by the LED light source can be guided to the light emitting surface of the light guide.
  • the LED point light source becomes a uniform surface light source, and thus the use of the light guide is more and more.
  • a Chinese patent application with the application number CN201420837784.9 discloses a light guide type automobile taillight, and specifically discloses a lamp cover having a lamp housing and a lamp cover; the lamp housing and the lamp cover form a closed space, and the lamp cover is connected in the lamp cover LED bracket, the LED bracket is provided with a light guide belt in one circle; the device uses a high-power LED as a light source, and the light guide strip conducts light, which can effectively reduce the loss of light brightness during transmission, and is fully superimposed by the mirror To prevent dark areas. In the end, the pipeline distribution is even and full, which reduces the production cost.
  • the reflective surface and the lamp cover of the above-mentioned light-guide type automobile tail lamp adopt a separate design, which increases the production cost on the one hand, and causes many components of the lamp lamp, has a complicated structure, and is not easy to reduce the volume, and the limitation of the reflective light-emitting structure is for the light-emitting.
  • the height dimension of the surface There is a certain demand for the height dimension of the surface, and it is difficult to form a thick-walled light guide structure having an ultra-narrow light-emitting surface.
  • the present invention provides a reflective thick-walled light guide and illumination device to solve the above technical problems.
  • the technical solution of the present invention is:
  • a reflective thick-walled light guide comprising at least one reflective surface, at least one top surface, at least one correcting surface and at least one light emitting surface, wherein the top surface is respectively connected to the reflecting surface and the correcting surface, and the reflecting surface and the top surface Together with the corrective surface, a cavity with a bottom opening is formed.
  • top surface and the optical axis of the light guide are parallel or the angle between the top surface and the optical axis of the light guide is less than 5 degrees.
  • the cross-sectional shape of the reflecting surface is parabolic, and the reflecting surface is coated with a light reflecting layer, and the reflective layer has a reflectance of 0.7-0.9.
  • the light reflecting layer is an aluminum plating layer.
  • the correction surface is disposed perpendicular to the top surface, and the light is reflected and enters the light guide from the correction surface and is emitted from the light exit surface.
  • a plurality of diffusing teeth are distributed on the light-emitting surface, and an angle ⁇ between adjacent diffusing teeth is 60°-120°, and a center distance L between two adjacent diffusing teeth is 1- 7 mm, the tooth height H of the diffusing tooth is 1-3 mm, and the height S of the light exit surface is 3-10 mm.
  • the tooth height H is 2 mm, and the height S of the light exit surface is 4 mm.
  • a lighting device comprising the above-mentioned reflective thick-walled light guide, the lighting device further comprising a light source device and a circuit board, the light source device being mounted on a circuit board, the circuit board being disposed in the cavity At the opening, the light source device is located at a focus position of the reflecting surface.
  • the light source diffusing angle ⁇ of the light source device is 30°-60°, and the light emitted by the light source device is reflected by the reflecting surface and is perpendicularly incident into the correcting surface.
  • the lighting device further includes a driving board that is electrically connected to the wiring board.
  • the thick-walled light guide of the present invention plays the light while the thick-walled light guide cover is external to the light source device, and functions as a lamp cover, so that the illumination device is simple and low in cost;
  • the thick-walled light guide of the present invention uses an aluminized reflective surface to reflect light emitted by the light source device, the reflected parallel light is parallel to the optical axis of the thick-walled light guide or the deviation between the parallel light and the optical axis of the thick-walled light guide
  • the angle is less than 5 degrees, and the light-emitting efficiency of the light source device can be reasonably adjusted to meet the regulatory value requirements of various functions of the lighting device, especially the lamp structure;
  • the light-emitting portion of the thick-walled light guide of the present invention is provided with a correcting surface, and the correcting surface is used to correct the light beam to the parallel light beam to leave the light-emitting surface, which is beneficial to improving the uniformity of lighting;
  • the thick-walled light guide of the invention has a narrow light-emitting surface, and when used on a lighting device, it can exhibit a straight lighting effect, which is convenient for designing and enhancing effects;
  • the thick-walled light guide and illumination device of the present invention can be used in a lamp structure, such as a position lamp, a turn signal, a brake light, a rear fog lamp, a daytime running light, etc. in a vehicle lamp, and has a wide range of applications.
  • FIG. 1 is a schematic structural view of a lighting device of the present invention
  • Figure 2 is a cross-sectional view taken along line A-A of Figure 1, in which the arrows indicate the direction of the light;
  • Fig. 3 is an enlarged view of a portion B of Fig. 1;
  • 1-thick wall light guide 11-reflecting surface; 12-top surface; 13 correcting surface; 14-light emitting surface; 2-light source device; 3-circuit board; F indicates optical axis direction of thick-walled light guide.
  • a reflective thick-walled light guide includes at least one reflective surface 11, at least one top surface 12, at least one correcting surface 13 and at least one light emitting surface 14, respectively, and the top surface 12 and the reflecting surface respectively 11.
  • the correcting surface 13 is joined, and the reflecting surface 11, the top surface 12 and the correcting surface 13 together form a cavity with a bottom opening.
  • the reflective surface 11 is configured to reflect light emitted by the light source device.
  • the reflective surface 11 has a parabolic shape, and the reflective surface 11 is coated with a reflective layer.
  • the reflective layer has a reflectivity of 0.7- 0.9.
  • the light reflecting layer is an aluminized layer.
  • An upper portion of the reflective surface 11 is in contact with the top surface 12, and a lower portion of the reflective surface 11 extends from the bottom surface 15.
  • the bottom surface 15 and the top surface 12 are substantially parallel, and the bottom surface 15 is provided with a light source device. Groove.
  • the top surface 12 is a plane, the top surface 12 is parallel to the optical axis of the thick-walled light guide or the angle between the top surface 12 and the optical axis of the thick-walled light guide does not exceed 5 degrees, thick wall
  • the optical axis direction of the light guide is as shown in F.
  • the top surface 12 is in contact with an upper portion of at least one reflective surface 11, and the top surface 12 is in contact with at least one correcting surface 13.
  • the correcting surface 13 is perpendicular to the top surface 12, and the correcting surface 13 is a flat surface.
  • the correcting surface 13 is used for correcting the light incident after the reflection, so that the light is kept parallel to the light emitting surface 14 uniformly.
  • the light reflected by the reflecting surface enters from the correction surface 13 and is emitted from the light-emitting surface 14, and the height S of the light-emitting surface 14 is 3-10 mm, preferably 4 mm.
  • a plurality of diffusing teeth 141 are evenly distributed on the light-emitting surface 14 .
  • the angle ⁇ of the diffusing teeth 141 ranges from 60° to 120°, and the center distance between two adjacent diffusing teeth 141 is The range of L, L is 1-7 mm, the tooth height H of the diffusing tooth 141 is 1-3 mm, and the tooth height H is preferably 2 mm.
  • the heights of the light-emitting surface 14 and the diffusion pattern teeth 141 are both small, and a line effect is exhibited when the light is emitted.
  • the light is refracted by the diffusing tooth 141 and emitted within a certain angular range, which meets the basic requirements for the lighting device, especially the general requirements of the illumination angle of the lamp.
  • a lighting device comprising a thick-walled light guide 1 further comprising a light source device 2 and a circuit board 3, the light source device 2 being disposed on a circuit board 3, the circuit board 3 being disposed at a cavity opening of the thick-walled light guide 1,
  • the light source device 2 is disposed toward the inside of the cavity, and the mounting position of the light source device 2 is preferably at a focus position of the reflective surface 11 of the thick-walled light guide 1, so that the light emitted by the light source device 2 passes through the reflective surface 11 to achieve total reflection.
  • the correcting surface 13 is kept in parallel rays directed toward the light exit surface 14, and is emitted through the light exit surface 14.
  • the light source device 2 is a light source device capable of emitting light, and the light source device 2 is preferably an LED lamp.
  • the light source device 2 has a light emission diffusion angle of ⁇ , and the ⁇ is the light emitted by the light source device 2 and the light source device 2 The angle between the horizontal planes is 30°-60°.
  • the lighting device further includes a driving board 17 electrically connected to the wiring board 3 for supplying power to the light source device 2 and controlling the light source device 2.
  • the drive plate 17 is disposed on the upper portion of the thick-walled light guide 1 and is parallel to the top surface 12 of the thick-walled light guide 1.
  • the light source device 2 on the circuit board 3 is controlled by the driving board 17 to emit light, and the light is irradiated on the reflecting surface 11 of the thick-walled light guide 1, and reflected by the reflecting surface 11 to form parallel rays.
  • the parallel ray is directed toward the correcting surface 13 in a direction parallel to the optical axis direction F or at an angle of less than 5 degrees with respect to the optical axis direction F.
  • the correcting surface 13 corrects the light to be kept parallel rays toward the light emitting surface 14 through the light emitting surface. 14 shots.
  • the height S of the light-emitting surface 14 is small, so that a line effect is visually presented.
  • the thick-walled light guide and illumination device of the invention can be used for a lamp structure, such as a position lamp, a turn signal, a brake light, a rear fog lamp, a daytime running lamp, etc. in a vehicle lamp, and has a wide application range and good effect.
  • a lamp structure such as a position lamp, a turn signal, a brake light, a rear fog lamp, a daytime running lamp, etc. in a vehicle lamp, and has a wide application range and good effect.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种反射式厚壁光导（1）和照明装置。该反射式厚壁光导（1），包括至少一个反射面（11）、至少一个顶面（12）、至少一个矫正面（13）和至少一个出光面（14），该顶面（12）分别与反射面（11）、矫正面（13）相接，该反射面（11）、顶面（12）和矫正面（13）共同形成一个底部开口的腔体。解决了现有技术中存在的反射面（11）和灯罩分离式设计结构复杂，增加产品体积和成本的问题。

Description

一种反射式厚壁光导和照明装置 技术领域
本发明涉及光学领域，具体涉及一种反射式厚壁光导和照明装置。
背景技术
目前，汽车后位置灯多采用光导结构，光导的优势在于：可以很大程度上减少LED的颗数，从而降低整个车灯的价格；可以将LED光源所发出的光线引导至光导的出光面上，进而使LED点光源变成均匀的面光源，因而光导的使用越来越多。
申请号为CN201420837784.9的中国申请公开了一种光导式汽车尾灯，并具体公开了具有车灯壳与其相配合的灯罩；所述灯壳与灯罩形成封闭的空间，位于所述灯罩内连接有LED支架，所述LED支架一圈设有光导带；该装置采用高功率的LED作为光源，同时光导条对光线进行传导，能有效减少传输过程中光亮度的损失，并通过反射镜得到充分叠加，防止出现暗区现象。最终实现了管线分布均匀饱满，降低了生产成本。但是上述的光导式汽车尾灯的反射面和灯罩采用分离式设计，一方面增加了生产成本，一方面造成了车灯构件多，结构复杂，不易缩小体积，由于反射式发光结构的局限性对于出光面的高度尺寸有一定需求，不易形成具有超窄发光面的厚壁式光导结构。
发明内容
为了解决现有技术中存在的反射面和灯罩分离式设计结构复杂，增加产品体积和成本的问题，本发明提出一种反射式厚壁光导和照明装置解决上述技术问题。本发明的技术方案为：
一种反射式厚壁光导，包括至少一个反射面、至少一个顶面、至少一个矫正面和至少一个出光面，所述顶面分别与反射面、矫正面相接，所述反射面、顶面和矫正面共同形成一个底部开口的腔体。
进一步地，所述顶面和光导的光轴平行或者所述顶面和光导的光轴之间的夹角小于5度。
进一步地，所述反射面的截面形状为抛物线形，所述反射面上涂覆有反光层，所述反光层的反射率为0.7-0.9。
进一步地，所述反光层为镀铝层。
进一步地，所述矫正面与顶面垂直设置，光线经反射后从矫正面进入光导并从出光面射出。
进一步地，所述出光面上分布有多个扩散花纹齿，相邻的扩散花纹齿的夹角β为60°-120°，相邻的两个扩散花纹齿之间的中心距离L为1-7mm，所述扩散花纹齿的齿高H为1-3mm，所述出光面的高度S为3-10mm。
进一步地，所述齿高H为2mm，所述出光面的高度S为4mm。
一种照明装置，所述照明装置包括上述的一种反射式厚壁光导，所述照明装置还包括光源装置和线路板，所述光源装置安装在线路板上，所述线路板设置在腔体开口处，所述光源装置位于反射面的焦点位置。
进一步地，所述光源装置的发光扩散角度ɑ为30°-60°，所述光源装置发出的光线经反射面反射后呈平行光线垂直射入矫正面。
进一步地，所述照明装置还包括驱动板，所述驱动板与线路板电 连接。
基于上述技术方案，本发明所能实现的技术效果为：
1.本发明的厚壁光导在起到传导光线的同时，厚壁光导罩在光源装置的外部，起到灯罩的作用，这样照明装置简单、成本低；
2.本发明的厚壁光导采用镀铝的反射面，对光源装置发出的光线进行反射，反射的平行光线与厚壁光导的光轴平行或者平行光线与厚壁光导的光轴之间的偏离角度小于5度，此外还能合理调节光源装置的出光效率，满足照明装置尤其是车灯结构的各个功能的法规值要求；
3.本发明的厚壁光导的出光部设有矫正面，通过矫正面使光线被正确矫正为平行光束离开出光面，有益于提高点亮均匀性效果；
4.本发明的厚壁光导的出光面窄，运用在照明装置上时，可以呈现一条直线的点亮效果，方便设计造型，增强效果；
5.本发明的厚壁光导和照明装置可以被用于车灯结构，例如车灯中的位置灯、转向灯、制动灯、后雾灯、日行灯等等，应用范围广。
附图说明
图1为本发明的照明装置的结构示意图；
图2为图1的A-A截面图，图中箭头表示光线方向；
图3为图1的B部放大图。
图中，1-厚壁光导；11-反射面；12-顶面；13矫正面；14-出光面；2-光源装置；3-线路板；F表示厚壁光导的光轴方向。
具体实施方式
下面结合附图对本发明的内容作进一步地说明。
如图1-3所示，一种反射式厚壁光导，包括至少一个反射面11、至少一个顶面12、至少一个矫正面13和至少一个出光面14，所述顶面12分别与反射面11、矫正面13相接，所述反射面11、顶面12和矫正面13共同形成一个底部开口的腔体。
所述反射面11用于对光源装置发出的光线进行反射，所述反射面11的截面形状为抛物线形，所述反射面11上涂覆有反光层，所述反光层的反射率为0.7-0.9，优选地，所述反光层为镀铝层。所述反射面11的上部和顶面12相接，所述反射面11的下部延伸出底面15，所述底面15和所述顶面12基本平行，所述底面15上设置有配合光源装置安装的凹槽。
所述顶面12为平面，所述顶面12与所述厚壁光导的光轴平行或者所述顶面12与所述厚壁光导的光轴之间的夹角不超过5度，厚壁光导的光轴方向如图中F所示。所述顶面12和至少一个反射面11的上部相接，所述顶面12和至少一个矫正面13相接。所述矫正面13和所述顶面12垂直，所述矫正面13为平面，所述矫正面13用于矫正反射后射入的光线，使光线保持为平行光线均匀射向出光面14。
如图3所示，经反射面反射后的光线从矫正面13进入，从出光面14射出，所述出光面14的高度S为3-10mm，优选为4mm。所述出光面14上均匀分布有多个扩散花纹齿141，所述扩散花纹齿141的夹角β的角度范围为60°-120°，相邻两个扩散花纹齿141之间的中心距离为L，L的范围为1-7mm，所述扩散花纹齿141的齿高H为1-3mm，齿高H优选为2mm。所述出光面14和扩散花纹齿141的高 度均较小，发光时会呈现一条线的效果。光线经扩散花纹齿141折射，在一定的角度范围内发射出来，符合对照明装置的基本要求，尤其是车灯的照射角度的一般要求。
一种照明装置，包括厚壁光导1，还包括光源装置2和线路板3，所述光源装置2设置在线路板3上，所述线路板3设置在厚壁光导1的腔体开口处，所述光源装置2朝向腔体内部设置，所述光源装置2的安装位置优选为位于厚壁光导1的反射面11的焦点位置，这样光源装置2射出的光线经过反射面11后可以实现全反射，且大部分光线经反射面反射后为平行光线，所述平行光线沿与光轴方向F平行或者与光轴方向F的夹角小于5度的方向射向矫正面13，所述矫正面13矫正光线保持为平行光线射向出光面14，通过出光面14射出。
所述光源装置2为能发出光的光源装置，所述光源装置2优选为LED灯，所述光源装置2的发光扩散角度为ɑ，所述ɑ为光源装置2发出的光线与光源装置2所在的水平面之间的夹角，所述ɑ的范围为30°-60°。
所述照明装置还包括驱动板17，所述驱动板17和线路板3电连接，所述驱动板17用于对光源装置2提供电源并控制光源装置2。优选地，所述驱动板17设置在厚壁光导1的上部，且与厚壁光导1的顶面12平行。
上述照明装置在使用过程中，通过驱动板17控制线路板3上的光源装置2工作，发出光线，光线照射在厚壁光导1的反射面11上，经反射面11反射后成平行光线，所述平行光线沿与光轴方向F平行 或者与光轴方向F的夹角小于5度的方向射向矫正面13，所述矫正面13矫正光线保持为平行光线射向出光面14，通过出光面14射出。所述出光面14的高度S较小，所以视觉上呈现出一条线的效果。
本发明的厚壁光导和照明装置可以用于车灯结构，例如车灯中的位置灯、转向灯、制动灯、后雾灯、日行灯等等，应用范围广，效果好。
上面结合附图对本发明的实施方式作了详细说明，但是本发明并不限于上述实施方式，在本领域普通技术人员所具备的知识范围内，还可以在不脱离本发明的宗旨的前提下做出各种变化。

Claims (10)

  1. 一种反射式厚壁光导，其特征在于，包括至少一个反射面(11)、至少一个顶面(12)、至少一个矫正面(13)和至少一个出光面(14)，所述顶面(12)分别与反射面(11)、矫正面(13)相接，所述反射面(11)、顶面(12)和矫正面(13)共同形成一个底部开口的腔体。
  2. 如权利要求1所述的一种反射式厚壁光导，其特征在于，所述顶面(12)和光导的光轴平行或者所述顶面(12)和光导的光轴之间的夹角小于5度。
  3. 如权利要求1或2所述的一种反射式厚壁光导，其特征在于，所述反射面(11)的截面形状为抛物线形，所述反射面(11)上涂覆有反光层，所述反光层的反射率为0.7-0.9。
  4. 如权利要求3所述的一种反射式厚壁光导，其特征在于，所述反光层为镀铝层。
  5. 如权利要求1或4所述的一种反射式厚壁光导，其特征在于，所述矫正面(13)与顶面(12)垂直设置，光线经反射后从矫正面(13)进入并从出光面(14)射出。
  6. 如权利要求5所述的一种反射式厚壁光导，其特征在于，所述出光面(14)上分布有多个扩散花纹齿(141)，扩散花纹齿(141)的夹角β为60°-120°，相邻的两个扩散花纹齿(141)之间的中心距离L为1-7mm，所述扩散花纹齿(141)的齿高H为1-3mm，所述出光面(14)的高度S为3-10mm。
  7. 如权利要求6所述的一种反射式厚壁光导，其特征在于，所述齿高H为2mm，所述出光面(14)的高度S为4mm。
  8. 一种照明装置，其特征在于，所述照明装置包括如权利要求1-7任一项所述的一种反射式厚壁光导，所述照明装置还包括光源装置(2)和线路板(3)，所述光源装置(2)安装在线路板(3)上，所述线路板(3)设置在腔体开口处，所述光源装置(2)位于反射面(11)的焦点位置。
  9. 如权利要求8所述的一种照明装置，其特征在于，所述光源装置(2)的发光扩散角度ɑ为30°-60°，所述光源装置(2)发出的光线经反射面(11)反射后呈平行光线垂直射入矫正面(13)。
  10. 如权利要求8或9所述的一种照明装置，其特征在于，所述照明装置还包括驱动板，所述驱动板与线路板(3)电连接。
PCT/CN2018/119037 2017-12-06 2018-12-04 一种反射式厚壁光导和照明装置 WO2019109895A1 (zh)

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