CN212112106U - A light guide element and light source device - Google Patents

A light guide element and light source device Download PDF

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CN212112106U
CN212112106U CN202020596406.1U CN202020596406U CN212112106U CN 212112106 U CN212112106 U CN 212112106U CN 202020596406 U CN202020596406 U CN 202020596406U CN 212112106 U CN212112106 U CN 212112106U
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light
region
light source
area
source device
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方元戎
郭祖强
李屹
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Shenzhen Appotronics Corp Ltd
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Appotronics Corp Ltd
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Priority to PCT/CN2021/086414 priority patent/WO2021213195A1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00Refractors for light sources
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/30Elements containing photoluminescent material distinct from or spaced from the light source
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/28Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/14Details
    • G03B21/20Lamp housings

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The application discloses light guide element and light source device, this light guide element includes first region and the second region that lies in first region relative both sides respectively, and the first region is used for reflecting at least partly first light and passes through the second light, and the second region is used for passing through first light and second light, and wherein, the wavelength range of first light and the wavelength range of second light are different. Through the mode, the light emitting efficiency can be improved, and the cost is reduced.

Description

一种光引导元件以及光源装置A light guide element and light source device

技术领域technical field

本申请涉及显示技术领域,具体涉及一种光引导元件以及光源装置。The present application relates to the field of display technology, and in particular, to a light guide element and a light source device.

背景技术Background technique

现有激光荧光白光源可作为投影显示中的光源,也能用于舞台灯或射灯,该激光荧光白光源包括区域膜片,区域膜片包括位于中心的镀膜区域以及位于周围的第二区域,合成的白光在穿过第二区域时会有至少2.5%的损耗,由于第二区域的面积较大,损失的光较多,致使发光效率下降;另外,由于镀膜区域设置于区域膜片的中心区域,在镀膜时,需要对每一个膜片单独使用一个掩膜,不需要镀膜的区域比需要镀膜的区域大很多,这样大大降低了生产效率,导致成本上的浪费。The existing laser fluorescent white light source can be used as a light source in projection display, and can also be used for stage lights or spotlights. The laser fluorescent white light source includes an area diaphragm, and the area diaphragm includes a coating area in the center and a second area in the periphery. , the synthesized white light will have a loss of at least 2.5% when passing through the second area. Due to the larger area of the second area, more light is lost, resulting in a decrease in luminous efficiency; In the central area, when coating, a separate mask needs to be used for each diaphragm. The area that does not need coating is much larger than the area that needs coating, which greatly reduces production efficiency and leads to waste in cost.

实用新型内容Utility model content

本申请提供一种光引导元件以及光源装置,能够提高发光效率,降低成本。The present application provides a light guide element and a light source device, which can improve the luminous efficiency and reduce the cost.

为解决上述技术问题,本申请采用的技术方案是:提供一种光引导元件,该光引导元件包括:第一区域以及分别位于第一区域相对两侧的第二区域,第一区域用于反射至少部分第一光并透射第二光,第二区域用于透射第一光和第二光,其中,第一光的波长范围和第二光的波长范围不同。In order to solve the above technical problems, the technical solution adopted in the present application is to provide a light guide element, the light guide element includes: a first area and a second area respectively located on opposite sides of the first area, and the first area is used for reflection At least a portion of the first light and the second light are transmitted, and the second region is used for transmitting the first light and the second light, wherein the wavelength range of the first light and the wavelength range of the second light are different.

为解决上述技术问题,本申请采用的另一技术方案是:提供一种光源装置,该光源装置包括:光源、光引导元件以及波长转换装置,光源用于产生第一光;光引导元件设置于第一光的光路上,其包括第一区域以及分别位于第一区域相对两侧的第二区域,第一区域用于反射至少部分第一光并透射第二光,第二区域用于透射第一光和第二光;波长转换装置用于接收光引导元件反射的第一光,并将至少部分第一光转换为第二光,第二光经过第一区域和第二区域透射出射,其中,第一光的波长范围和第二光的波长范围不同。In order to solve the above technical problem, another technical solution adopted in the present application is to provide a light source device, the light source device includes: a light source, a light guide element and a wavelength conversion device, the light source is used to generate the first light; the light guide element is arranged on the The optical path of the first light includes a first area and second areas respectively located on opposite sides of the first area, the first area is used to reflect at least part of the first light and transmit the second light, and the second area is used to transmit the first light. a light and a second light; the wavelength conversion device is used for receiving the first light reflected by the light guiding element, and converting at least part of the first light into second light, and the second light is transmitted through the first region and the second region, wherein , the wavelength range of the first light and the wavelength range of the second light are different.

通过上述方案,本申请的有益效果是:由于仅在第一区域的相对两侧设置用于透射光的第二区域,可减小第二区域的面积,使得出射的光透过第二区域的量减少,减少光损失;在加工光引导元件时,多个光引导元件可共用一个掩膜,通过切割可获得多个光引导元件,能够简化加工工艺,可显著提高生产效率,降低生产成本,且使得光源装置的发光效率提高。Through the above solution, the beneficial effect of the present application is: since the second regions for transmitting light are only provided on opposite sides of the first region, the area of the second region can be reduced, so that the emitted light can pass through the second region. Reduce the amount of light and reduce light loss; when processing light guide elements, multiple light guide elements can share a mask, and multiple light guide elements can be obtained by cutting, which can simplify the processing process, significantly improve production efficiency, and reduce production costs. And the luminous efficiency of the light source device is improved.

附图说明Description of drawings

为了更清楚地说明本申请实施例中的技术方案,下面将对实施例描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本申请的一些实施例,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。其中:In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort. in:

图1是本申请提供的光引导元件一实施例的结构示意图;1 is a schematic structural diagram of an embodiment of a light guide element provided by the present application;

图2是图1所示的实施例中光引导元件的层结构示意图;FIG. 2 is a schematic view of the layer structure of the light guiding element in the embodiment shown in FIG. 1;

图3是图1所示的实施例中多个光引导元件的排列示意图;3 is a schematic diagram of the arrangement of a plurality of light guiding elements in the embodiment shown in FIG. 1;

图4是本申请提供的光源装置一实施例的结构示意图;4 is a schematic structural diagram of an embodiment of a light source device provided by the present application;

图5是本申请提供的光源装置另一实施例的结构示意图;5 is a schematic structural diagram of another embodiment of a light source device provided by the present application;

图6是图5所示的实施例中波长转换装置的第一结构示意图;Fig. 6 is the first structural schematic diagram of the wavelength conversion device in the embodiment shown in Fig. 5;

图7是图5所示的实施例中波长转换装置的第二结构示意图。FIG. 7 is a schematic diagram of a second structure of the wavelength conversion device in the embodiment shown in FIG. 5 .

具体实施方式Detailed ways

下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本申请一部分实施例,而不是全部实施例。基于本申请中的实施例,本领域普通技术人员在没有做出创造性的劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

光在介质面发生反射和透射时,可以将振动分解成垂直于入射面的分量(S分量)和平行于入射面的分量(P分量),自然光(S光与P光之和)的反射率随着入射角度增大而增大,反而言之,自然光的透过率随着入射角度的增大而减小。When light is reflected and transmitted on the medium surface, the vibration can be decomposed into a component perpendicular to the incident surface (S component) and a component parallel to the incident surface (P component), the reflectivity of natural light (the sum of S light and P light) It increases with the increase of the incident angle, and conversely, the transmittance of natural light decreases with the increase of the incident angle.

由于白光出射后要透过区域膜片后才能被后续光学系统利用,现在使用区域膜片的光源设计都使用在一片玻璃板上镀膜的方式,当区域膜片的外周为透光面时,在镀AR(Anti-Reflection,减反射)膜后也只能有97.5%的透过率,而且区域镀膜在工艺上耗费工时较多,成本较高。Since the white light has to pass through the area film after it is emitted, it can be used by the subsequent optical system. Now the light source designs using the area film are all coated on a glass plate. When the outer periphery of the area film is a light-transmitting surface, the After the AR (Anti-Reflection, anti-reflection) film is coated, it can only have a transmittance of 97.5%, and the regional coating takes a lot of man-hours in the process and the cost is high.

请参阅图1,图1是本申请提供的光引导元件一实施例的结构示意图,光引导元件10包括第一区域11以及分别位于第一区域11相对两侧的第二区域12。在本实施例中,第一区域11和第二区域12均呈矩形,第一区域11具有相对的上侧与下侧,其中一个第二区域12位于第一区域11的上侧,另一个第二区域12位于第一区域11的下侧,即第一区域11位于光引导元件10的中间区域,此时,光引导元件10沿上下的方向延伸。当然,两个第二区域12也可以分别位于第一区域11相对的左侧与右侧,此时,光引导元件10沿左右的方向延伸。优选的,在垂直于光引导元件10的延伸方向上,第一区域11的宽度与第二区域12的宽度相同,如此设置,光引导元件10形成一完整的矩形,使得光引导元件10在加工时易于切割分离。Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of an embodiment of a light guide element provided by the present application. The light guide element 10 includes a first area 11 and second areas 12 respectively located on opposite sides of the first area 11 . In this embodiment, the first area 11 and the second area 12 are both rectangular, the first area 11 has opposite upper and lower sides, one of the second areas 12 is located on the upper side of the first area 11, and the other is located on the upper side of the first area 11. The second area 12 is located on the lower side of the first area 11 , that is, the first area 11 is located in the middle area of the light guide element 10 , at this time, the light guide element 10 extends in the up-down direction. Of course, the two second regions 12 may also be located on the opposite left and right sides of the first region 11, respectively. In this case, the light guide element 10 extends in the left and right directions. Preferably, the width of the first region 11 is the same as the width of the second region 12 in the direction perpendicular to the extension direction of the light guide element 10 . In this way, the light guide element 10 forms a complete rectangle, so that the light guide element 10 is processed during processing. Easy to cut and separate.

可以理解地,基于具体的应用需求,第二区域12的宽度也可与第一区域11的宽度不同,两个第二区域12之间的宽度也可以不同。第一区域11和第二区域12的形状并不局限于矩形,也可以为圆形、三角形、梯形、六边形等其他多边形。第一区域11和第二区域12也可以分别为不同的形状。It can be understood that, based on specific application requirements, the width of the second region 12 may also be different from the width of the first region 11 , and the width between the two second regions 12 may also be different. The shapes of the first area 11 and the second area 12 are not limited to rectangles, and may also be other polygons such as circles, triangles, trapezoids, and hexagons. The first region 11 and the second region 12 may have different shapes, respectively.

第一区域11用于反射至少部分第一光并透射第二光,第一光的波长范围和第二光的波长范围不同,第一光与第二光可以是单色光,例如,第一光可以是蓝光,第二光可以是黄光;具体地,第一区域11用于反射第一偏振态的第一光,并透射第二偏振态的第一光,例如,第一偏振态的第一光包括S偏振蓝光,第二偏振态的第一光包括P偏振蓝光。The first region 11 is used for reflecting at least part of the first light and transmitting the second light, the wavelength range of the first light and the wavelength range of the second light are different, and the first light and the second light may be monochromatic light, for example, the first light The light may be blue light, and the second light may be yellow light; specifically, the first region 11 is used to reflect the first light of the first polarization state, and transmit the first light of the second polarization state, for example, the first light of the first polarization state The first light includes S-polarized blue light, and the first light of the second polarization state includes P-polarized blue light.

第二区域12为未镀膜的区域,可为玻璃片,能够透射全部波长的光,具体地,其可透射第一光和第二光。The second region 12 is an uncoated region, which can be a glass sheet, and can transmit light of all wavelengths, specifically, it can transmit the first light and the second light.

在一具体的实施例中,如图2所示,第一区域11包括第一透明基板111以及设置于第一透明基板111上的光学镀膜112,第二区域12包括第二透明基板121;第一透明基板111与第二透明基板121可为一体成型,或者采用不同的材料制作。In a specific embodiment, as shown in FIG. 2 , the first area 11 includes a first transparent substrate 111 and an optical coating 112 disposed on the first transparent substrate 111 , and the second area 12 includes a second transparent substrate 121 ; The first transparent substrate 111 and the second transparent substrate 121 can be integrally formed, or made of different materials.

本实施例中的光引导元件10可作为分光片应用于3LCD(Liquid CrystalDisplay,液晶显示器)白光源中,第一区域11的相对两侧的透明的第二区域12被保留下来,以方便结构的固定,由于仅在第一区域11的相对两侧设置用于透射光的第二区域12,可减小第二区域12的面积,使得光尽量少地经过透过率仅有97.5%的第二区域12,从而提高光源效率。The light guide element 10 in this embodiment can be used as a beam splitter in a 3LCD (Liquid Crystal Display, liquid crystal display) white light source, and the transparent second regions 12 on opposite sides of the first region 11 are reserved to facilitate structural Fixed, since only the second regions 12 for transmitting light are provided on opposite sides of the first region 11, the area of the second region 12 can be reduced, so that the light passes through the second region with a transmittance of only 97.5% as little as possible. area 12, thereby improving the efficiency of the light source.

在加工光引导元件10时,如图3所示,多个光引导元件10可共用一个掩膜,在镀膜完成后,可以通过切割获得多个光引导元件10,能够显著提高生产效率,减少成本。When processing the light guide elements 10, as shown in FIG. 3, a plurality of light guide elements 10 can share a mask, and after the coating is completed, a plurality of light guide elements 10 can be obtained by cutting, which can significantly improve production efficiency and reduce costs .

请参阅图4,图4是本申请提供的光源装置一实施例的结构示意图,光源装置40包括:光源41、光引导元件42以及波长转换装置43。Please refer to FIG. 4 . FIG. 4 is a schematic structural diagram of an embodiment of a light source device provided by the present application. The light source device 40 includes a light source 41 , a light guide element 42 and a wavelength conversion device 43 .

光源41用于产生第一光,光源41可以为激光器。The light source 41 is used to generate the first light, and the light source 41 may be a laser.

光引导元件42设置于第一光的光路上,其包括第一区域421以及分别位于第一区域421相对两侧的第二区域422,其用于反射至少部分第一光并透射第二光,第一光的波长范围和第二光的波长范围不同;第二区域422可允许全部波长的光束通过,具体地,第二区域422用于透射第一光和第二光,光引导元件42为上述实施例中的光引导元件。The light guiding element 42 is disposed on the light path of the first light, and includes a first area 421 and a second area 422 respectively located on opposite sides of the first area 421, which are used for reflecting at least part of the first light and transmitting the second light, The wavelength range of the first light and the wavelength range of the second light are different; the second region 422 can allow beams of all wavelengths to pass through, specifically, the second region 422 is used to transmit the first light and the second light, and the light guiding element 42 is The light-guiding element in the above-described embodiments.

进一步地,第一区域421用于反射第一偏振态的第一光,并透射第二偏振态的第一光,例如,第一偏振态的第一光包括S偏振蓝光,第二偏振态的第一光包括P偏振蓝光。Further, the first region 421 is used to reflect the first light of the first polarization state and transmit the first light of the second polarization state, for example, the first light of the first polarization state includes S-polarized blue light, and the first light of the second polarization state The first light includes P-polarized blue light.

波长转换装置43设置于第一光的光路上,其用于接收光引导元件42反射的第一光,并将至少部分第一光转换为第二光,第二光经过第一区域421和第二区域422透射出射;具体地,第一光被光引导元件42反射至波长转换装置43,波长转换装置43可以为荧光粉色轮,波长转换装置43设置有荧光转换材料,该第二光可以为荧光,例如,黄色荧光。The wavelength conversion device 43 is disposed on the optical path of the first light, and is used for receiving the first light reflected by the light guiding element 42 and converting at least part of the first light into second light, and the second light passes through the first region 421 and the second light. The second area 422 transmits and exits; specifically, the first light is reflected by the light guide element 42 to the wavelength conversion device 43, the wavelength conversion device 43 can be a fluorescent pink wheel, the wavelength conversion device 43 is provided with a fluorescent conversion material, and the second light can be Fluorescence, eg, yellow fluorescence.

光源装置40发出的光由光源41产生的第一光以及波长转换装置43发出的第二光组成,当第一光入射至光引导元件42时,至少部分第一光被第一区域421反射至波长转换装置43,波长转换装置43中的荧光转换材料受到激发,从而产生相应的第二光,该第二光可透过第一区域421与第二区域422,而未激发荧光材料的部分第一光可与荧光合成白光,由于第二区域422的面积减少,使得白光经过第二区域422的部分减少,光引导元件42面积以外的白光都能无损出射,从而提高了光源装置40的发光效率。The light emitted by the light source device 40 is composed of the first light generated by the light source 41 and the second light emitted by the wavelength conversion device 43. When the first light is incident on the light guiding element 42, at least part of the first light is reflected by the first region 421 to The wavelength conversion device 43, the fluorescent conversion material in the wavelength conversion device 43 is excited to generate the corresponding second light, the second light can pass through the first area 421 and the second area 422, and the part of the fluorescent material is not excited. One light can be combined with fluorescent light to synthesize white light. Since the area of the second region 422 is reduced, the portion of the white light passing through the second region 422 is reduced, and the white light outside the area of the light guide element 42 can be emitted without damage, thereby improving the luminous efficiency of the light source device 40 .

请参阅图5,图5是本申请提供的光源装置另一实施例的结构示意图,光源装置50包括:光源51、光引导元件52、波长转换装置53、正负透镜54、匀光器件55以及收集透镜56。Please refer to FIG. 5. FIG. 5 is a schematic structural diagram of another embodiment of the light source device provided by the present application. The light source device 50 includes: a light source 51, a light guide element 52, a wavelength conversion device 53, a positive and negative lens 54, a light homogenizing device 55, and Collection lens 56 .

光源51可以为蓝光激光器,其发出的蓝激光经过正负透镜54,正负透镜54设置于第二光的光路上,其用于对第二光进行压缩,并将压缩后的第二光射入匀光器件55。The light source 51 can be a blue laser, and the blue laser emitted by the blue laser passes through the positive and negative lenses 54, and the positive and negative lenses 54 are arranged on the optical path of the second light, which is used for compressing the second light and emitting the compressed second light. into the uniform light device 55 .

匀光器件55设置于第一光的光路上,其用于对第一光进行匀光,并将匀光后的第一光射入光引导元件52的第一区域;具体地,匀光器件55可以为双复眼透镜或方棒,其可对蓝光激光器发出的蓝激光进行均匀化,蓝激光被光引导元件52的第一区域反射后,沿着收集透镜56的中心轴入射。The homogenizing device 55 is arranged on the optical path of the first light, and is used for homogenizing the first light, and injecting the homogenized first light into the first area of the light guiding element 52; specifically, the homogenizing device 55 can be a double fly-eye lens or a square rod, which can homogenize the blue laser light emitted by the blue laser.

收集透镜56设置于光引导元件52与波长转换装置53的光路上,收集透镜56对蓝激光进行汇聚,蓝激光经过收集透镜56收集后入射到波长转换装置53上;波长转换装置53将接收的蓝激光至少部分地转换为黄色荧光,黄色荧光被收集透镜56收集被传导至光引导元件52,在光引导元件52面积以内的黄色荧光能够透过光引导元件52的第一区域和第二区域出射,在光引导元件52面积以外的黄色荧光无需透过光引导元件52,能够无损地出射。在一具体的实施例中,波长转换装置53出射黄色荧光和未被转换的蓝激光,二者混合成白光,该白光被收集透镜56收集并传导至光引导元件52,光引导元件52的第一区域能够透射黄色荧光,第二区域能够透射黄色荧光和未被转换的蓝激光。The collection lens 56 is arranged on the optical path between the light guide element 52 and the wavelength conversion device 53, and the collection lens 56 converges the blue laser light, and the blue laser light is collected by the collection lens 56 and then incident on the wavelength conversion device 53; The blue laser light is at least partially converted into yellow fluorescence, which is collected by the collection lens 56 and conducted to the light guiding element 52 . The yellow fluorescence within the area of the light guiding element 52 can pass through the first and second regions of the light guiding element 52 . For exit, the yellow fluorescent light outside the area of the light guide element 52 does not need to pass through the light guide element 52 and can be exited without damage. In a specific embodiment, the wavelength conversion device 53 emits yellow fluorescent light and unconverted blue laser light, and the two are mixed into white light, and the white light is collected by the collecting lens 56 and transmitted to the light guiding element 52. One region is capable of transmitting yellow fluorescence, and a second region is capable of transmitting yellow fluorescence and unconverted blue laser light.

进一步地,由于如果蓝激光全部被第一区域反射,则中间区域将缺乏蓝光,使得中心区域发黄,因而可通过偏振态的设置,解决中间区域发黄的问题,同时提高发光效率;具体地,光源41用于产生第一偏振态的第一光,第一区域用于反射第一偏振态的第一光,并透射第二偏振态的第一光;波长转换区域531用于接收被第一区域反射的第一偏振态的第一光,并将部分第一偏振态的第一光转换为第二光;未被转换的第一偏振态的第一光的偏振态被波长转换区域531散射后出射,变为第一偏振态的第一光和第二偏振态的第一光,与第二光一起自波长转换装置53出射,第二偏振态的第一光能够和第二光从第一区域透射,从而减少中间区域发黄的问题,同时提高发光效率;例如,第一偏振态的第一光包括S偏振蓝光,第二偏振态的第一光包括P偏振蓝光。Further, if the blue laser light is all reflected by the first region, the middle region will lack blue light, making the central region yellow, so the problem of yellowing in the middle region can be solved by setting the polarization state, and the luminous efficiency can be improved at the same time; , the light source 41 is used to generate the first light of the first polarization state, the first area is used to reflect the first light of the first polarization state, and transmit the first light of the second polarization state; the wavelength conversion area 531 is used to receive the first light of the first polarization state. The first light of the first polarization state is reflected by a region, and part of the first light of the first polarization state is converted into the second light; the polarization state of the first light of the first polarization state that is not converted is converted by the wavelength conversion region 531 After scattering, it is emitted, and becomes the first light of the first polarization state and the first light of the second polarization state, and is emitted from the wavelength conversion device 53 together with the second light, and the first light of the second polarization state can be combined with the second light from The first region transmits, thereby reducing the problem of yellowing in the middle region and improving luminous efficiency; for example, the first light of the first polarization state includes S-polarized blue light, and the first light of the second polarization state includes P-polarized blue light.

在一具体的实施例中,光引导元件52可相对于光源51出射的第一光的光轴呈倾斜45°放置,如图5所示。In a specific embodiment, the light guide element 52 can be placed at an inclination of 45° with respect to the optical axis of the first light emitted from the light source 51 , as shown in FIG. 5 .

在一实施方式中,如图6所示,波长转换装置53包括波长转换区域531,波长转换区域531用于接收入射的第一光,并产生第二光。第二光为黄色荧光,波长转换区域531为环形区域,该环形区域设置有黄色荧光材料,该黄色荧光材料受到部分蓝激光的激发后,产生黄色荧光,而未被转换的蓝激光与黄荧光混合成白光,即波长转换区域531出射的光包括黄色荧光与未被转换的蓝激光。In one embodiment, as shown in FIG. 6 , the wavelength conversion device 53 includes a wavelength conversion region 531 for receiving the incident first light and generating the second light. The second light is yellow fluorescence, the wavelength conversion region 531 is an annular region, and the annular region is provided with a yellow fluorescent material. After the yellow fluorescent material is excited by part of the blue laser, yellow fluorescence is generated, and the unconverted blue laser and yellow fluorescence Mixed into white light, that is, the light emitted from the wavelength conversion region 531 includes yellow fluorescent light and unconverted blue laser light.

此实施方式中光源51出射的第一光经过匀光器件55匀光后,被光引导元件52的第一区域反射进入收集透镜56,再成像在波长转换装置53上产生黄荧光,激发的黄荧光与未被激发的蓝激光合成白光,再经过收集透镜56收集,当到达光引导元件52时,在光引导元件52以外的白光都能无损的进入后续光学系统,形成出射光,在第一区域以内,S偏振蓝光被反射,P偏振蓝光与黄荧光被透射,相比于现有技术的光源方案,窄长型的光引导元件52降低了光源的损失,提高了光源51的发光效率,降低了成本。In this embodiment, the first light emitted from the light source 51 is homogenized by the homogenizing device 55, and then reflected by the first region of the light guiding element 52 into the collecting lens 56, and then imaged on the wavelength conversion device 53 to generate yellow fluorescence. The fluorescent light and the unexcited blue laser light are synthesized into white light, which is then collected by the collection lens 56. When reaching the light guide element 52, the white light outside the light guide element 52 can enter the subsequent optical system without damage to form outgoing light. Within the area, the S-polarized blue light is reflected, and the P-polarized blue light and yellow fluorescent light are transmitted. Compared with the light source solution in the prior art, the narrow and long light guide element 52 reduces the loss of the light source and improves the luminous efficiency of the light source 51. Reduced costs.

在另一实施方式中,第二光包括红色荧光与绿色荧光,如图7所示,波长转换区域531包括红光转换区域5311与绿光转换区域5312,红光转换区域5311设置有红色荧光材料,绿光转换区域5312设置有绿色荧光材料。进一步地,波长转换装置53还包括散射区域532,散射区域532用于对入射的第一光进行散射,波长转换区域531出射的第二光可与散射区域532出射的第一光合成白光。波长转换区域531与散射区域532可以位于波长转换装置53的同一半径的不同位置处,使得波长转换区域531与散射区域532呈环形排布。In another embodiment, the second light includes red fluorescent light and green fluorescent light. As shown in FIG. 7 , the wavelength conversion region 531 includes a red light conversion region 5311 and a green light conversion region 5312 , and the red light conversion region 5311 is provided with a red fluorescent material. , the green light conversion region 5312 is provided with a green fluorescent material. Further, the wavelength conversion device 53 further includes a scattering region 532 for scattering the incident first light, and the second light emitted from the wavelength conversion region 531 can be combined with the first light emitted from the scattering region 532 to synthesize white light. The wavelength conversion area 531 and the scattering area 532 may be located at different positions of the same radius of the wavelength conversion device 53 , so that the wavelength conversion area 531 and the scattering area 532 are arranged in a ring shape.

在另一具体的实施例中,光引导元件52的延伸方向与第一光形成的入射平面垂直,具体地,光源51出射的第一光经光引导元件52反射至波长转换装置53,被光引导元件52反射前的第一光的光路和被光引导元件52反射后的第一光的光路形成一入射平面,配置使光引导元件52的延伸方向垂直于第一光形成的入射平面,能够减少光引导元件52在波长转换装置53出射的第二光的方向上所占的空间,从而减小收集透镜56与后续光学系统之间的距离,有效减少光学扩展量稀释,进一步地提高光源51的发光效率。In another specific embodiment, the extending direction of the light guide element 52 is perpendicular to the incident plane formed by the first light. Specifically, the first light emitted from the light source 51 is reflected to the wavelength conversion device 53 by the light guide element 52, The optical path of the first light before being reflected by the guiding element 52 and the optical path of the first light after being reflected by the light guiding element 52 form an incident plane, and the arrangement is such that the extending direction of the light guiding element 52 is perpendicular to the incident plane formed by the first light. The space occupied by the light guide element 52 in the direction of the second light emitted by the wavelength conversion device 53 is reduced, thereby reducing the distance between the collection lens 56 and the subsequent optical system, effectively reducing etendue dilution, and further improving the light source 51 luminous efficiency.

本实施例提供了一种使用窄长型的光引导元件52作为分光片的方案,通过减小光引导元件52中的第二区域的面积,降低白光通过光引导元件52的损失量,提高了光源装置50的发光效率,并且由于多个光引导元件52可共用一个掩膜,可简化工艺上的难度,降低生产成本。This embodiment provides a solution of using a narrow and long light guide element 52 as a beam splitter. By reducing the area of the second region in the light guide element 52, the loss of white light passing through the light guide element 52 is reduced, and the The luminous efficiency of the light source device 50 and the fact that a plurality of light guide elements 52 can share one mask can simplify the difficulty of the process and reduce the production cost.

以上仅为本申请的实施例,并非因此限制本申请的专利范围,凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换,或直接或间接运用在其他相关的技术领域,均同理包括在本申请的专利保护范围内。The above are only the embodiments of the present application, and are not intended to limit the scope of the patent of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present application, or directly or indirectly applied in other related technical fields, All the same are included in the scope of patent protection of the present application.

Claims (11)

1. A light directing element comprising a first region for reflecting at least a portion of a first light and transmitting a second light, and second regions on opposite sides of the first region, respectively, the second regions for transmitting the first light and the second light;
wherein a wavelength range of the first light and a wavelength range of the second light are different.
2. A light-directing element according to claim 1,
the first region is used for reflecting the first light in the first polarization state and transmitting the first light in the second polarization state.
3. A light-directing element according to claim 1,
the first region and the second region are each rectangular, and the width of the first region is the same as the width of the second region in a direction perpendicular to the extending direction of the light guiding element.
4. A light-directing element according to claim 1,
the first region comprises a first transparent substrate and an optical coating film arranged on the first transparent substrate, and the second region comprises a second transparent substrate.
5. A light source device, comprising:
a light source for generating first light;
a light directing element disposed in an optical path of the first light, the light directing element being as claimed in any one of claims 1-4, the first region being configured to reflect at least a portion of the first light;
the wavelength conversion device is used for receiving the first light reflected by the light guide element and converting at least part of the first light into second light, and the second light is transmitted and emitted through the first area and the second area;
wherein a wavelength range of the first light and a wavelength range of the second light are different.
6. The light source device according to claim 5,
the light source is used for generating first light in a first polarization state, and the first area is used for reflecting the first light in the first polarization state and transmitting the first light in a second polarization state.
7. The light source device according to claim 5,
the wavelength conversion device includes a wavelength conversion region for receiving the incident first light and generating the second light.
8. The light source device according to claim 7,
the second light is yellow fluorescence, and the wavelength conversion region is provided with a yellow fluorescent material, or
The second light comprises red fluorescence and green fluorescence, the wavelength conversion region comprises a red light conversion region and a green light conversion region, the red light conversion region is provided with a red fluorescent material, and the green light conversion region is provided with a green fluorescent material.
9. The light source device according to claim 7,
the wavelength conversion device further comprises a scattering region, the scattering region and the wavelength conversion region are arranged in an annular shape, and the scattering region is used for scattering the incident first light.
10. The light source device according to claim 5,
the extending direction of the light guiding element is perpendicular to the incident plane formed by the first light.
11. The light source device according to claim 5,
the light source device further comprises a light homogenizing device, wherein the light homogenizing device is arranged on a light path of the first light and is used for homogenizing the first light and enabling the homogenized first light to enter the light guide element.
CN202020596406.1U 2020-04-20 2020-04-20 A light guide element and light source device Active CN212112106U (en)

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