WO2022036708A1 - 智能设备、微透镜阵列投影装置及其阵列基板 - Google Patents

智能设备、微透镜阵列投影装置及其阵列基板 Download PDF

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WO2022036708A1
WO2022036708A1 PCT/CN2020/110581 CN2020110581W WO2022036708A1 WO 2022036708 A1 WO2022036708 A1 WO 2022036708A1 CN 2020110581 W CN2020110581 W CN 2020110581W WO 2022036708 A1 WO2022036708 A1 WO 2022036708A1
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microlens array
lens layer
arc
arc surface
lens
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PCT/CN2020/110581
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English (en)
French (fr)
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李建德
陈冠宏
冯坤亮
李宗政
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欧菲光集团股份有限公司
欧菲微电子技术有限公司
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Priority to PCT/CN2020/110581 priority Critical patent/WO2022036708A1/zh
Publication of WO2022036708A1 publication Critical patent/WO2022036708A1/zh

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS 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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F19/00—Advertising or display means not otherwise provided for
    • G09F19/12—Advertising or display means not otherwise provided for using special optical effects
    • G09F19/18—Advertising or display means not otherwise provided for using special optical effects involving the use of optical projection means, e.g. projection of images on clouds

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  • the invention relates to the technical field of optical imaging, in particular to an intelligent device, a microlens array projection device and an array substrate thereof.
  • the existing projection apparatus is relatively bulky, and the existing relatively bulky projection apparatus cannot be installed in a smart device.
  • the purpose of the present invention is to provide a smart device, a microlens array projection device and an array substrate thereof, so as to solve the technical problem of the large size of the projection device.
  • the present invention provides a microlens array substrate, comprising: an optical system and an image layer, wherein the optical system includes a first microlens array element and a second microlens array element which are spaced apart and oppositely arranged along an optical axis direction, the first microlens array element
  • the microlens array element includes a first base and a first lens layer, the first base includes a first surface and a second surface opposite to the first surface, the image layer is formed on the first surface, and the The first lens layer is formed on the second surface, the second microlens array element includes a second base, a second lens layer and a third lens layer, the second base includes a third surface and is connected with the first lens.
  • the outer surface of a lens layer includes a first arc surface, the outer surface of the second lens layer includes a second arc surface, and the outer surface of the third lens layer includes a third arc surface, so that external light passes through the After the image layer is formed, the image is formed on the imaging surface after being refracted by the first arc surface, the second arc surface and the third arc surface in sequence.
  • the first arc surface of the first microlens array element refracts the light
  • the second arc surface and the third arc surface of the second microlens array element refracts the light, so that the light is more inclined, which can make the outside
  • the light of the microlens array can be imaged on the imaging surface by propagating a small distance in the direction of the imaging surface, so that the size of the microlens array substrate along the optical axis direction is small, the microlens array substrate is thin, and the cost is low.
  • the distance from the vertex of the first arc surface to the second surface is between 15um and 1000um
  • the distance between the vertex of the second arc surface and the third surface is between 15um and 1000um
  • the distance between the vertex of the third arc surface and the fourth surface is between 15um and 1000um.
  • the above-mentioned distance between the first arc surface and the second surface, the above-mentioned distance between the second arc surface and the third surface, and the above-mentioned distance between the third arc surface and the fourth surface in the present application can make the light more inclined, and can The image can be imaged on the imaging surface by making the outside light travel a small distance in the direction of the imaging surface.
  • the effective focal length of the optical system is between 0.1 mm and 10 mm.
  • the focal length reasonably compresses the effective focal length of the optical system on the basis of ensuring good imaging quality, which is beneficial to compress the total length of the microlens array substrate.
  • the optical system satisfies the conditional formula: 1 ⁇ TTL/ImgH ⁇ 8, wherein, TTL is the distance from the first surface to the imaging surface on the optical axis, and ImgH is the diagonal length of the effective pixel area of the imaging surface half of .
  • TTL is the distance from the first surface to the imaging surface on the optical axis
  • ImgH is the diagonal length of the effective pixel area of the imaging surface half of .
  • the first arc surface is a convex surface
  • the second arc surface is a convex surface
  • the third arc surface is a convex surface
  • the first arc surface is a concave surface
  • the second arc surface is a convex surface
  • the The third arc surface is a concave surface.
  • the first lens layer includes a plurality of first micro-lenses connected in sequence, each of the first micro-lenses includes one of the first arc surfaces;
  • the second lens layer includes a plurality of second micro-lenses connected in sequence Microlenses, each of the second microlenses includes one of the second arc surfaces;
  • the third lens layer includes a plurality of third microlenses connected in sequence, and each of the third microlenses includes one of the first Three arc surfaces, a plurality of the first microlenses, a plurality of the second microlenses and a plurality of the third microlenses are in one-to-one correspondence, and the corresponding one of the first microlens, the second microlens
  • the lens and the third microlens form a lens unit; the images formed by refraction of the plurality of lens units overlap on the imaging plane.
  • the image of the image layer can be imaged through a plurality of lens units, and the image layer can be imaged multiple times and projected
  • the plurality of the second microlens array elements are arranged in sequence along the optical axis direction, and the plurality of the second microlens array elements are located in the first microlens array the same side of the element.
  • Multiple second microlens array elements can make the light refracted more times, the light is more inclined, and the light can be imaged on the imaging surface by traveling a smaller distance in the direction of the imaging surface, so that the microlens array substrate is along the optical axis direction.
  • the size of the microlens array is smaller, and the thickness of the microlens array substrate is reduced.
  • the material of the first lens layer includes UV glue
  • the material of the second lens layer includes UV glue
  • the material of the third lens layer includes UV glue
  • the first lens layer is processed by nano-imprinting or thermal reflow process forming
  • the second lens layer is formed by a nano-imprinting or thermal reflow process
  • the third lens layer is formed by a nano-imprinting or thermal reflow process.
  • Ultraviolet adhesive is a thermosetting adhesive material, with high temperature resistance and good reliability, which is more advantageous in the vehicle environment.
  • the nanoimprinting or thermal reflow process is simple and can save costs.
  • the present invention provides a microlens array projection device, comprising a light source, a homogenizing mirror group and the above-mentioned microlens array substrate, wherein the homogenizing mirror group is arranged between the light source and the microlens array substrate.
  • the volume of the microlens array projection device is also small and thin.
  • the present invention provides an intelligent device including the above-mentioned microlens array projection device.
  • the microlens array projection device of the present invention is thin and small, and can be installed in an intelligent device with a small internal volume.
  • the intelligent device includes an intelligent vehicle.
  • the microlens array projection device of the present invention is thin and small, and can be installed in an intelligent vehicle with a small internal volume.
  • FIG. 1 is a schematic structural diagram of a conventional projection device.
  • FIG. 2 is a schematic structural diagram of a microlens array projection device provided by an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of the microlens array substrate in FIG. 2 .
  • FIG. 4 is another schematic structural diagram of the microlens array substrate in FIG. 2 .
  • FIG. 5 is a first structural schematic diagram of the optical system in FIG. 2 .
  • FIG. 6 is a schematic diagram of a second structure of the optical system in FIG. 2 .
  • FIG. 7 is a schematic diagram of a third structure of the optical system in FIG. 2 .
  • a conventional projection device includes a light source 10 , a light homogenizer group 20 , a film 30 and a projection lens group 40 , which are arranged at intervals in sequence.
  • the light of the light source 10 is projected on the imaging surface through the homogenizing mirror group 20 , the film 30 and the projection lens group 40 in sequence.
  • the film 30 is projected into the lighting pattern required by the application. Due to the large volume of the projection lens group 40 and the spaced arrangement of the film 30 and the projection lens group 40 , the design total length of the projection device is greater than 1 cm, or even greater than 10 cm, and the structure of the projection device is relatively large.
  • the present invention provides a microlens array projection device.
  • the microlens array projection device includes a light source 10 , a homogenizing mirror group 20 and a microlens array substrate 100 .
  • the light source 10 is an LED light source 10 for emitting light.
  • the dodging lens group 20 is used to collect and shape the light of the LED light source 10 to improve the optical efficiency.
  • the light of the light source 10 reaches the microlens array substrate 100 after being shaped by the homogenizing mirror group 20 .
  • the microlens array substrate 100 of the present application is smaller and thinner, and the microlens array projection device is also smaller and thinner.
  • the microlens array substrate 100 will be described in detail as follows.
  • the microlens array substrate 100 includes: an optical system 50 and an image layer 60 , and the optical system 50 includes a first microlens array element 501 and a second microlens array element that are spaced apart and opposite along the optical axis direction 502, the first microlens array element 501 includes a first substrate 70 and a first lens layer 130, the first substrate 70 includes a first surface 701 and a second surface 702 opposite to the first surface 701, and the image layer 60 is formed on the first surface 701.
  • the direction of the optical axis is the direction in which the light passes through, and is the direction from the image layer 60 to the imaging surface. If the first microlens array element 501 is an axisymmetric element, and the second microlens array element 502 is an axisymmetric element, the central axis of the first microlens array element 501 is coincident with the central axis of the second microlens array element 502, and the optical axis The direction is the direction in which the central axis of the first microlens array element 501 is located, or the direction in which the central axis of the second microlens array element 502 is located.
  • the refraction of light by the first arc surface 1301 of the first microlens array element 501 and the refraction of light by the second arc surface 901 and the third arc surface 1101 of the second microlens array element 502 such that The light is more inclined, so that the outside light can travel a small distance toward the imaging surface to form an image on the imaging surface, so that the size of the microlens array substrate 100 along the optical axis direction is small, and the microlens array substrate 100 is thinned. lower cost.
  • the first lens layer 130 includes a plurality of first microlenses 210 connected in sequence, and each first microlens 210 includes a first arc surface 1301 ;
  • the second lens layer 90 includes a plurality of sequentially connected The second microlenses 220, each second microlens 220 includes a second arc surface 901;
  • the third lens layer 110 includes a plurality of third microlenses 230 connected in sequence, and each third microlens 230 includes a third
  • the arc surface 1101 has a one-to-one correspondence with a plurality of first microlenses 210 , a plurality of second microlenses 220 and a plurality of third microlenses 230 , corresponding to a first microlens 210 , a second microlens 220 and a third microlens
  • the lens 230 forms one lens unit 240; the images formed by refraction by the plurality of lens units 240 overlap on the imaging plane.
  • the optical system 50 includes a middle part and an edge part, the edge parts are located on both sides of the middle part, the lens unit 240 located in the middle part of the optical system is the main lens unit 2401, and the lens unit located at the edge part of the optical system 50 is the auxiliary lens unit.
  • Lens unit 2402 the image formed by refraction by the main lens unit 2401 is the reference image, and the image formed by refraction by the auxiliary lens unit 2402 is the auxiliary image.
  • the refractive index of the main lens unit 2401 is different from that of the auxiliary lens unit 2402.
  • the unit 2402 is used to refract the auxiliary image toward the reference image, so that the auxiliary image coincides with the reference image.
  • the present application can image the image of the image layer 60 through a plurality of lens units 240, and the image layer 60 can be imaged multiple times and projected to the target area by overlapping, and the superimposed projected image can achieve a high-contrast lighting effect. That is, in the present application, the image of the image layer 60 is imaged through the multiple first arc surfaces 1301 , the multiple second arc surfaces 901 and the multiple third arc surfaces 1101 of the multiple lens units 240 , and the image layer 60 can be imaged multiple times. Overlapping projection to the target area, the superimposed projection image can achieve high-contrast lighting effects. It can be understood that the refractive indices of the plurality of first arc surfaces 1301 are different, the refractive indices of the second arc surfaces 901 are different, and the refractive indices of the third arc surfaces 1101 are different.
  • the present application can not only achieve good projection imaging quality, but also reduce the thickness of the microlens array substrate 100 .
  • the microlens array substrate 100 of the present application can replace the traditional projection lens group 40, and the image layer 60 can be laminated on the first surface 701, which solves the problem of the large volume of the traditional projection lens group 40 and the difference between the film 30 and the projection lens.
  • the mirror groups 40 are arranged at intervals, resulting in a technical problem of a larger volume of the projection device.
  • the distance H1 from the vertex of the first arc surface 1301 to the second surface 702 is between 15um-1000um
  • the distance H2 between the vertex of the second arcuate surface 901 and the third surface 801 is between 15um- Between 1000um
  • the distance H3 between the vertex of the third arc surface 1101 and the fourth surface 802 is between 15um and 1000um. It can be understood that the farthest distance from the first arc surface 1301 to the second surface 702 is between 15um and 1000um
  • the farthest distance from the second arc surface 901 to the third surface 801 is between 15um and 1000um
  • the third arc The farthest distance from the surface 1101 to the fourth surface 802 is 15um-1000um.
  • the aforementioned distance between the first arc surface 1301 and the second surface 702, the aforementioned distance between the second arc surface 901 and the third surface 801, and the aforementioned distance between the third arc surface 1101 and the fourth surface 802 in the present application may be By making the light more inclined, the outside light can be imaged on the imaging surface by traveling a small distance in the direction of the imaging surface.
  • the effective focal length of the optical system 50 is between 0.1 mm and 10 mm.
  • the focal length reasonably compresses the effective focal length of the optical system 50 on the basis of ensuring good imaging quality, which is beneficial to compress the total length of the microlens array substrate 100 .
  • the optical system 50 satisfies the conditional formula: 1 ⁇ TTL/ImgH ⁇ 8, where TTL is the distance from the first surface 701 to the imaging surface on the optical axis, and ImgH is the diagonal angle of the effective pixel area of the imaging surface half the length of the line.
  • TTL is the distance from the first surface 701 to the imaging surface on the optical axis
  • ImgH is the diagonal angle of the effective pixel area of the imaging surface half the length of the line.
  • the size of the microlens array substrate 100 along the optical axis direction is ⁇ 10 mm. That is, when the microlens array substrate 100 satisfies the conditional expression described above, the size of the microlens array substrate 100 of the present application along the optical axis direction is ⁇ 10 mm.
  • the microlens array substrate 100 can not only meet the requirements of miniaturization, but also meet the requirements of imaging.
  • the plurality of second microlens array elements 502 are arranged in sequence along the optical axis direction, and the plurality of second microlens array elements 502 are located in the first microlens The same side of array element 501 .
  • the plurality of second microlens array elements 502 can make the light refracted more times, the light is more inclined, and the light can be imaged on the imaging surface by traveling a smaller distance in the direction of the imaging surface, so that the microlens array substrate 100 can be imaged on the imaging surface.
  • the size in the axial direction is smaller, and the thickness of the microlens array substrate 100 is reduced.
  • the material of the first lens layer 130 includes UV glue
  • the material of the second lens layer 90 includes UV glue
  • the material of the third lens layer 110 includes UV glue
  • the first lens layer 130 is nano-imprinted Or formed by a thermal reflow process
  • the second lens layer 90 is formed by a nano-imprint or thermal reflow process
  • the third lens layer 110 is formed by a nano-imprint or thermal reflow process.
  • Ultraviolet adhesive is a thermosetting adhesive material, with high temperature resistance and good reliability, which is more advantageous in the vehicle environment.
  • the nanoimprinting or thermal reflow process is simple and can save costs. It can be understood that the material of the first substrate 70 includes optically transparent glass, and the material of the second substrate 80 includes optically transparent glass.
  • the first embodiment is a first embodiment.
  • the first arc surface 1301 of the first lens layer 130 is convex
  • the second arc surface 901 of the second lens layer 90 is convex
  • the third arc surface 1101 of the third lens layer 110 is convex.
  • the TTL/ImgH of the optical system 50 is 2.059.
  • Table 1a shows a table of characteristics of the optical system 50 of the present embodiment, and the units of Y radius, thickness and focal length are all millimeters (mm).
  • any one of the first arc surface 1301 , the second arc surface 901 and the third arc surface 1101 is an aspheric surface, and the surface type x of each aspheric surface can be defined by, but not limited to, the following aspheric surface formulas :
  • x is the distance vector height of the aspheric surface from the vertex of the aspheric surface when the height is h along the optical axis;
  • k is the conic coefficient;
  • Ai is the correction coefficient of the i-th order of the aspheric surface.
  • Table 1b shows the higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each of the aspheric mirror surfaces S1-S16 in the first embodiment.
  • the first arc surface 1301 of the first lens layer 130 is convex
  • the second arc surface 901 of the second lens layer 90 is convex
  • the third arc surface 1101 of the third lens layer 110 is convex.
  • the TTL/ImgH of the optical system 50 is 2.068.
  • Table 2a shows a table of characteristics of the optical system 50 of the present embodiment, and the units of Y radius, thickness and focal length are all millimeters (mm).
  • Table 2b shows the coefficients of higher-order terms that can be used for each aspherical mirror surface in the second embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.
  • the first arc surface 1301 of the first lens layer 130 is concave
  • the second arc surface 901 of the second lens layer 90 is convex
  • the third arc surface 1101 of the third lens layer 110 is concave.
  • at least one inflection point may be set on the first arc surface 1301 .
  • the TTL/ImgH of the optical system 50 is 2.327.
  • Table 3a shows a table of characteristics of the optical system 50 of the present embodiment, and the units of Y radius, thickness and focal length are all millimeters (mm).
  • Table 3b shows the coefficients of higher-order terms that can be used for each aspherical mirror surface in the third embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.
  • All of the above three embodiments can achieve good projection imaging quality, and the microlens array substrate 100 can be thinned.
  • the present invention also provides an intelligent device, which includes the above-mentioned microlens array projection device.
  • the microlens array projection device of the present invention is thin and small in volume, and even if the space inside the smart device is small, the microlens array projection device can be installed in the smart device.
  • the smart device includes a smart vehicle.
  • the intelligent vehicle includes the above-mentioned microlens array projection device.
  • the micro-lens array projection device of the present invention can be installed on the side of the vehicle door or on the driver's seat foot pad. On the basis of the lighting function, the safety and convenience of getting on and off the vehicle are increased, and it is also decorated, reminded, and intelligently interactive. and other functions.
  • the micro-lens array projection device of the present invention has a smaller volume, even if the functions of the vehicle are more and more, the electronic components of the main console are increasingly increased and complicated, and the space left for installing the projection device is smaller and smaller.
  • the lens array projection unit can still be installed in the vehicle.
  • the smart devices in this application may also include devices such as drones, smart home appliances, etc., which are not listed one by one in this application.

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Abstract

一种智能设备、微透镜阵列投影装置及其阵列基板（100）。微透镜阵列基板（100）包括：光学系统（50）与图像层（60），光学系统（50）包括沿光轴方向间隔且相对设置的第一微透镜阵列元件（501）与第二微透镜阵列元件（502），第一微透镜阵列元件（501）包括第一基体（70）与第一透镜层（130），第一基体（70）包括第一表面（701）以及与第一表面（701）相对设置的第二表面（702），图像层（60）形成在第一表面（701），第一透镜层（130）形成在第二表面（702），第二微透镜阵列元件（502）包括第二基体（80）、第二透镜层（90）以及第三透镜层（110），第二基体（80）包括第三表面（801）以及与第三表面（801）相对设置的第四表面（802），第三表面（801）朝向第二表面（702），第二透镜层（90）形成在第三表面（801），第三透镜层（110）形成在第四表面（802）；第一透镜层（130）的外表面包括第一弧面（1301），第二透镜层（90）的外表面包括第二弧面（901）。微透镜阵列基板（100）体积较小。

Description

智能设备、微透镜阵列投影装置及其阵列基板 技术领域
本发明涉及光学成像技术领域，特别涉及一种智能设备、微透镜阵列投影装置及其阵列基板。
背景技术
如今，随着智能设备的发展，智能设备内部的元件越来越多，可以容纳投影装置的空间越来越小。然而，现有投影装置的体积较大，现有的体积较大的投影装置无法安装在智能设备内。
发明内容
本发明的目的在于提供一种智能设备、微透镜阵列投影装置及其阵列基板，以解决投影装置的体积较大的技术问题。
本发明提供一种微透镜阵列基板，包括：光学系统与图像层，所述光学系统包括沿光轴方向间隔且相对设置的第一微透镜阵列元件与第二微透镜阵列元件，所述第一微透镜阵列元件包括第一基体与第一透镜层，所述第一基体包括第一表面以及与所述第一表面相对设置的第二表面，所述图像层形成在所述第一表面，所述第一透镜层形成在所述第二表面，所述第二微透镜阵列元件包括第二基体、第二透镜层以及第三透镜层，所述第二基体包括第三表面以及与所述第三表面相对设置的第四表面，第三表面朝向所述第二表面，所述第二透镜层形成在所述第三表面，所述第三透镜层形成在所述第四表面；所述第一透镜层的外表面包括第一弧面，所述第二透镜层的外表面包括第二弧面，所述第三透镜层的外表面包括第三弧面，以使得外界的光线经过所述图像层后，依次经所述第一弧面、所述第二弧面以及所述第三弧面折射后，在成像面上成像。本申请通过第一微透镜阵列元件的第一弧面对光线的折射，以及通过第二微透镜阵列元件的第二弧面和第三弧面对光线的折射，使得光线更加倾斜，可以使得外界的光线朝向成像面的方向传播较小的距离即可在成像面上成像，使得微透镜阵列基板沿光轴方向的尺寸较小，微透镜阵列基板薄型化，成本较低。
其中，第一弧面的顶点到所述第二表面的距离在15um-1000um之间，所述第二弧面的顶点到所述第三表面之间的距离在15um-1000um之间，所述第三弧面的顶点到所述第四表面之间的距离在15um-1000um之间。本申请的第一弧面到第二表面的上述距离，第二弧面到第三表面之间的上述距离，第三弧面到第四表面之间的上述距离，可以使得光线更加倾斜，可以使得外界的光线朝向成像面的方向传播较小的距离即可在成像面上成像。
其中，所述光学系统的有效焦距在0.1mm～10mm之间。该焦距在保证良好的成像质量的基础上，合理压缩光学系统的有效焦距，有利于压缩微透镜阵列基板总长度。
其中，所述光学系统满足条件式：1≤TTL/ImgH≤8，其中，TTL为所述第一表面至所述成像面于光轴上的距离，ImgH为成像面有效像素区域对角线长的一半。当光学系统满足上述条件式时，可有效压缩该光学系统的总长度，有利于压缩微透镜阵列基板总长度。
其中，所述第一弧面为凸面，所述第二弧面为凸面，所述第三弧面为凸面；或者，所述第一弧面为凹面，所述第二弧面为凸面，所述第三弧面为凹面。第一弧面、第二弧面以及第三弧面的上述形状可以实现良好的成像品质，且压缩微透镜阵列基板总长度。
其中，所述第一透镜层包括多个依次连接的第一微透镜，每个所述第一微透镜包括一个所述第一弧面；所述第二透镜层包括多个依次连接的第二微透镜，每个所述第二微透镜包括一个所述第二弧面；所述第三透镜层包括多个依次连接的第三微透镜，每个所述第三微透镜包括一个所述第三弧面，多个所述第一微透镜、多个所述第二微透镜以及多个所述第三微透镜一一对应，相对应的一个所述第一微透镜、所述第二微透镜以及所述第三微透镜形成一个透镜单元；经多个所述透镜单元折射形成的图像在所述成像面上重合。本申请可以通过多个透镜单元对图像层的图像进行成像，可以将图像层多重成像，重叠投影到目标区，叠加后的投影图像可以实现高对比的照明效果。
其中，所述第二微透镜阵列元件为多个，多个所述第二微透镜阵列元件沿光轴方向依次设置，且多个所述第二微透镜阵列元件位于所述第一微透镜阵列元件的同一侧。多个的第二微透镜阵列元件可以使得光线折射的次数更多，光 线更加倾斜，光线朝向成像面的方向传播更小的距离即可在成像面上成像，使得微透镜阵列基板沿光轴方向的尺寸更小，微透镜阵列基板薄型化。
其中，所述第一透镜层的材质包括紫外胶，第二透镜层的材料包括紫外胶，所述第三透镜层的材质包括紫外胶；所述第一透镜层通过纳米压印或者热回流工艺形成，所述第二透镜层通过纳米压印或者热回流工艺形成，所述第三透镜层通过纳米压印或者热回流工艺形成。紫外胶为热固胶材料，耐温性高，可靠度较佳，应用在车载环境较具优势。纳米压印或者热回流工艺简单，可以节约成本。
本发明提供一种微透镜阵列投影装置，包括光源、匀光镜组以及上述的微透镜阵列基板，所述匀光镜组设于所述光源与所述微透镜阵列基板之间。本申请由于微透镜阵列基板体积较小，薄型化，微透镜阵列投影装置的体积也较小，薄型化。
本发明提供一种智能设备，包括上述的微透镜阵列投影装置。本发明的微透镜阵列投影装置薄型化、体积较小，可以安装在内部体积较小的智能设备内。
其中，所述智能化设备包括智能车辆。本发明的微透镜阵列投影装置薄型化、体积较小，可以安装在内部体积较小的智能车辆内。
附图说明
为了更清楚地说明本申请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。
图1是传统的投影装置的结构示意图。
图2是本申请实施例提供的微透镜阵列投影装置的结构示意图。
图3是图2中的微透镜阵列基板的结构示意图。
图4是图2中的微透镜阵列基板的另一种结构示意图。
图5是图2中的光学系统的第一种结构示意图。
图6是图2中的光学系统的第二种结构示意图。
图7是图2中的光学系统的第三种结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明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发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
在描述本发明的实施例之前，首先描述传统的投影装置。
请参阅图1，传统的投影装置包括依次间隔设置的光源10、匀光镜组20、菲林片30以及投影镜组40。光源10的光线依次经过匀光镜组20、菲林片30以及投影镜组40投影在成像面上。其中菲林片30为被投影成应用需求之照明图样。此投影装置由于投影镜组40的体积较大，且菲林片30与投影镜组40间隔设置，投影装置的设计总长大于1cm，甚至大于10cm，投影装置的结构体积较大。
为了解决上述问题，本发明提供一种微透镜阵列投影装置。
请参阅图2，微透镜阵列投影装置包括光源10、匀光镜组20以及的微透镜阵列基板100，匀光镜组20设于光源10与微透镜阵列基板100之间。光源10为LED光源10，用于发出光线。匀光镜组20用于将将LED光源10的光线收集整形，以提升光学效率。光源10的光线经匀光镜组20整形后，到达微透镜阵列基板100。本申请的微透镜阵列基板100体积较小，薄型化，微透镜阵列投影装置的体积也较小，薄型化。
如下将详细介绍微透镜阵列基板100。
请参阅图3-图4，微透镜阵列基板100包括：光学系统50与图像层60，光学系统50包括沿光轴方向间隔且相对设置的第一微透镜阵列元件501与第二微透镜阵列元件502，第一微透镜阵列元件501包括第一基体70与第一透镜层130，第一基体70包括第一表面701以及与第一表面701相对设置的第二表面702，图像层60形成在第一表面701，第一透镜层130形成在第二表面702，第二微透镜阵列元件502包括第二基体80、第二透镜层90以及第三透镜层110，第二基体80包括第三表面801以及与第三表面801相对设置的第四表面802，第三表面801朝向第二表面702，第二透镜层90形成在第三表面 801，第三透镜层110形成在第四表面802；第一透镜层130的外表面包括第一弧面1301，第二透镜层90的外表面包括第二弧面901，第三透镜层110的外表面包括第三弧面1101，以使得外界的光线经过图像层60后，依次经第一弧面1301、第二弧面901以及第三弧面1101折射后，在成像面上成像。可以理解的是，光轴方向为光线穿过的方向，是从图像层60到成像面的方向。若第一微透镜阵列元件501为轴对称元件，第二微透镜阵列元件502为轴对称元件，第一微透镜阵列元件501的中心轴与第二微透镜阵列元件502的中心轴重合，光轴方向为第一微透镜阵列元件501的中心轴所在的方向，或第二微透镜阵列元件502的中心轴所在的方向。
本申请中，通过第一微透镜阵列元件501的第一弧面1301对光线的折射，以及通过第二微透镜阵列元件502的第二弧面901和第三弧面1101对光线的折射，使得光线更加倾斜，可以使得外界的光线朝向成像面的方向传播较小的距离即可在成像面上成像，使得微透镜阵列基板100沿光轴方向的尺寸较小，微透镜阵列基板100薄型化，成本较低。
在一个具体的实施例中，第一透镜层130包括多个依次连接的第一微透镜210，每个第一微透镜210包括一个第一弧面1301；第二透镜层90包括多个依次连接的第二微透镜220，每个第二微透镜220包括一个第二弧面901；第三透镜层110包括多个依次连接的第三微透镜230，每个第三微透镜230包括一个第三弧面1101，多个第一微透镜210、多个第二微透镜220以及多个第三微透镜230一一对应，相对应的一个第一微透镜210、第二微透镜220以及第三微透镜230形成一个透镜单元240；经多个透镜单元240折射形成的图像在成像面上重合。可以理解的是，光学系统50包括中间部分与边缘部分，边缘部分位于中间部分的两侧，位于光学系统中间部分的透镜单元240为主透镜单元2401，位于光学系统50边缘部分的透镜单元为辅助透镜单元2402，经主透镜单元2401折射后形成的图像为基准图像，经辅助透镜单元2402折射形成的图像为辅助图像，主透镜单元2401的折射率与辅助透镜单元2402的折射率不同，辅助透镜单元2402用于将辅助图像朝向基准图像折射，以使得辅助图像与基准图像重合。
从而，本申请可以通过多个透镜单元240对图像层60的图像进行成像， 可以将图像层60多重成像，重叠投影到目标区，叠加后的投影图像可以实现高对比的照明效果。即本申请通过多个透镜单元240的多个第一弧面1301、多个第二弧面901以及多个第三弧面1101对图像层60的图像进行成像，可以将图像层60多重成像，重叠投影到目标区，叠加后的投影图像可以实现高对比的照明效果。可以理解的是，多个第一弧面1301的折射率不同，多个第二弧面901的折射率不同，多个第三弧面1101的折射率不同。
从而，本申请不仅可以实现良好投影成像品质，还可以使得微透镜阵列基板100薄型化。
本申请的微透镜阵列基板100可以代替传统的投影镜组40，且图像层60可以层叠在第一表面701上，这解决了由于传统的投影镜组40体积较大，且菲林片30与投影镜组40间隔设置，所导致的投影装置的体积较大的技术问题。
在一个具体的实施例中，第一弧面1301的顶点到第二表面702的距离H1在15um-1000um之间，第二弧面901的顶点到第三表面801之间的距离H2在15um-1000um之间，第三弧面1101的顶点到第四表面802之间的距离H3在15um-1000um之间。可以理解的是，第一弧面1301到第二表面702的最远距离在15um-1000um之间，第二弧面901到第三表面801的最远距离在15um-1000um之间，第三弧面1101到第四表面802的最远距离在15um-1000um。本申请的第一弧面1301到第二表面702的上述距离，第二弧面901到第三表面801之间的上述距离，第三弧面1101到第四表面802之间的上述距离，可以使得光线更加倾斜，可以使得外界的光线朝向成像面的方向传播较小的距离即可在成像面上成像。
在一个具体的实施例中，光学系统50的有效焦距在0.1mm～10mm之间。该焦距在保证良好的成像质量的基础上，合理压缩光学系统50的有效焦距，有利于压缩微透镜阵列基板100总长度。
在一个具体的实施例中，光学系统50满足条件式：1≤TTL/ImgH≤8，其中，TTL为第一表面701至成像面于光轴上的距离，ImgH为成像面有效像素区域对角线长的一半。当光学系统50满足上述条件式时，可有效压缩该光学系统50的总长度，有利于压缩微透镜阵列基板100总长度。
在一个具体的实施例中，微透镜阵列基板100沿光轴方向的尺寸<10mm。 也就是说，当微透镜阵列基板100满足上文所描述的条件式时，本申请的微透镜阵列基板100沿光轴方向的尺寸<10mm。微透镜阵列基板100不仅可以满足小型化的要求，而且可以满足成像的要求。
在一个具体的实施例中，第二微透镜阵列元件502为多个，多个第二微透镜阵列元件502沿光轴方向依次设置，且多个第二微透镜阵列元件502位于第一微透镜阵列元件501的同一侧。多个的第二微透镜阵列元件502可以使得光线折射的次数更多，光线更加倾斜，光线朝向成像面的方向传播更小的距离即可在成像面上成像，使得微透镜阵列基板100沿光轴方向的尺寸更小，微透镜阵列基板100薄型化。
在一个具体的实施例中，第一透镜层130的材质包括紫外胶，第二透镜层90的材料包括紫外胶，第三透镜层110的材质包括紫外胶；第一透镜层130通过纳米压印或者热回流工艺形成，第二透镜层90通过纳米压印或者热回流工艺形成，第三透镜层110通过纳米压印或者热回流工艺形成。紫外胶为热固胶材料，耐温性高，可靠度较佳，应用在车载环境较具优势。纳米压印或者热回流工艺简单，可以节约成本。可以理解的是，第一基体70的材质包括光学透光玻璃，第二基体80的材质包括光学透光玻璃。
如下将介绍三个实施例。
第一实施例，
请参阅图5，第一透镜层130的第一弧面1301为凸面，第二透镜层90的第二弧面901为凸面，第三透镜层110第三弧面1101为凸面。
本实施例中，光学系统50的有效焦距f＝2.00mm，光学系统50的光圈数FNO＝2.80，光学系统50的TTL/ImgH＝2.059。
表1a示出了本实施例的光学系统50的特性的表格，Y半径、厚度和焦距的单位均为毫米(mm)。
表1a
Figure PCTCN2020110581-appb-000001
Figure PCTCN2020110581-appb-000002
在本实施例中，第一弧面1301、第二弧面901以及第三弧面1101的任意一个面均为非球面，各非球面的面型x可利用但不限于以下非球面公式进行限定：
Figure PCTCN2020110581-appb-000003
其中，x为非球面沿光轴方向在高度为h的位置时，距非球面顶点的距离矢高；c为非球面的近轴曲率，c＝1/R(即，近轴曲率c为上表1a中Y半径R的倒数)；k为圆锥系数；Ai是非球面第i-th阶的修正系数。表1b给出了可用于第一实施例中各非球面镜面S1-S16的高次项系数A4、A6、A8、A10、A12、A14、A16、A18和A20。
表1b
Figure PCTCN2020110581-appb-000004
第二实施例，
请参阅图6，第一透镜层130的第一弧面1301为凸面，第二透镜层90的第二弧面901为凸面，第三透镜层110第三弧面1101为凸面。
本实施例中，光学系统50的有效焦距f＝2.00mm，光学系统50的光圈数FNO＝2.80，光学系统50的TTL/ImgH＝2.068。
表2a示出了本实施例的光学系统50的特性的表格，Y半径、厚度和焦距的单位均为毫米(mm)。
表2a
Figure PCTCN2020110581-appb-000005
其中，表2a的各参数含义均与第一实施例各参数含义相同。
表2b给出了可用于第二实施例中各非球面镜面的高次项系数，其中，各非球面面型可由第一实施例中给出的公式限定。
表2b
Figure PCTCN2020110581-appb-000006
第三实施例，
请参阅图7，第一透镜层130的第一弧面1301为凹面，第二透镜层90的第二弧面901为凸面，第三透镜层110第三弧面1101为凹面。本实施例中，第一弧面1301上可以设有至少一个反曲点。
本实施例中，光学系统50的有效焦距f＝2.00mm，光学系统50的光圈数 FNO＝2.80，光学系统50的TTL/ImgH＝2.327。
表3a示出了本实施例的光学系统50的特性的表格，Y半径、厚度和焦距的单位均为毫米(mm)。
表3a
Figure PCTCN2020110581-appb-000007
其中，表3a的各参数含义均与第一实施例各参数含义相同。
表3b给出了可用于第三实施例中各非球面镜面的高次项系数，其中，各非球面面型可由第一实施例中给出的公式限定。
表3b
Figure PCTCN2020110581-appb-000008
上述三个实施例均可以实现良好投影成像品质，且微透镜阵列基板100薄型化。
本发明还提供一种智能设备，智能设备包括上述的微透镜阵列投影装置。本发明的微透镜阵列投影装置薄型化、体积较小，即使智能设备内部的空间较小，微透镜阵列投影装置也可以安装在智能设备内。
在一个具体的实施例中，智能设备包括智能车辆。智能车辆包括上述的微 透镜阵列投影装置。本发明的微透镜阵列投影装置可以安装在车辆的车门侧边或驾驶座脚踏垫上，在照明功能的基础上，增加上下车时的安全性与便利性，并兼具装饰、提醒、智能互动等功能。本发明的微透镜阵列投影装置体积较小，即使车辆的功能越来越多，主控台电子元件日益增多且复杂，留给安装投影装置的空间越来越小，本发明较小体积的微透镜阵列投影装置仍然可以安装在车辆内。
当然，可以理解的是，本申请的智能设备除了智能车辆之外，还可以包括无人机、智能家电等设备，本申请在此不再一一列举。
以上实施例的各技术特征可以进行任意的组合，为使描述简介，未对上述实施例中的各个技术特征所以可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，可应当认为是本说明书记载的范围。
以上实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明的保护范围应以所附权利要求为准。

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  1. 一种微透镜阵列基板，其特征在于，包括：光学系统与图像层，所述光学系统包括沿光轴方向间隔且相对设置的第一微透镜阵列元件与第二微透镜阵列元件，所述第一微透镜阵列元件包括第一基体与第一透镜层，所述第一基体包括第一表面以及与所述第一表面相对设置的第二表面，所述图像层形成在所述第一表面，所述第一透镜层形成在所述第二表面，所述第二微透镜阵列元件包括第二基体、第二透镜层以及第三透镜层，所述第二基体包括第三表面以及与所述第三表面相对设置的第四表面，第三表面朝向所述第二表面，所述第二透镜层形成在所述第三表面，所述第三透镜层形成在所述第四表面；所述第一透镜层的外表面包括第一弧面，所述第二透镜层的外表面包括第二弧面，所述第三透镜层的外表面包括第三弧面，以使得外界的光线经过所述图像层后，依次经所述第一弧面、所述第二弧面以及所述第三弧面折射后，在成像面上成像。
  2. 根据权利要求1所述的微透镜阵列基板，其特征在于，第一弧面的顶点到所述第二表面的距离在15um-1000um之间，所述第二弧面的顶点到所述第三表面之间的距离在15um-1000um之间，所述第三弧面的顶点到所述第四表面之间的距离在15um-1000um之间。
  3. 根据权利要求1所述的微透镜阵列基板，其特征在于，所述光学系统的有效焦距在0.1mm～10mm之间。
  4. 根据权利要求1所述的微透镜阵列基板，其特征在于，所述光学系统满足条件式：1≤TTL/ImgH≤8，其中，TTL为所述第一表面至所述成像面于光轴上的距离，ImgH为成像面有效像素区域对角线长的一半。
  5. 根据权利要求1所述的微透镜阵列基板，其特征在于，所述第一弧面为凸面，所述第二弧面为凸面，所述第三弧面为凸面；或者，所述第一弧面为凹面，所述第二弧面为凸面，所述第三弧面为凹面。
  6. 根据权利要求1所述的微透镜阵列投影装置，其特征在于，所述第一透镜层包括多个依次连接的第一微透镜，每个所述第一微透镜包括一个所述第一弧面；所述第二透镜层包括多个依次连接的第二微透镜，每个所述第二微透 镜包括一个所述第二弧面；所述第三透镜层包括多个依次连接的第三微透镜，每个所述第三微透镜包括一个所述第三弧面，多个所述第一微透镜、多个所述第二微透镜以及多个所述第三微透镜一一对应，相对应的一个所述第一微透镜、所述第二微透镜以及所述第三微透镜形成一个透镜单元；经多个所述透镜单元折射形成的图像在所述成像面上重合。
  7. 根据权利要求1所述的微透镜阵列投影装置，其特征在于，所述第二微透镜阵列元件为多个，多个所述第二微透镜阵列元件沿光轴方向依次设置，且多个所述第二微透镜阵列元件位于所述第一微透镜阵列元件的同一侧。
  8. 根据权利要求1所述的微透镜阵列基板，其特征在于，所述第一透镜层的材质包括紫外胶，第二透镜层的材料包括紫外胶，所述第三透镜层的材质包括紫外胶；所述第一透镜层通过纳米压印或者热回流工艺形成，所述第二透镜层通过纳米压印或者热回流工艺形成，所述第三透镜层通过纳米压印或者热回流工艺形成。
  9. 一种微透镜阵列投影装置，其特征在于，包括光源、匀光镜组以及如权利要求1-8任一项所述的微透镜阵列基板，所述匀光镜组设于所述光源与所述微透镜阵列基板之间。
  10. 一种智能设备，其特征在于，包括如权利要求9所述的微透镜阵列投影装置。
PCT/CN2020/110581 2020-08-21 2020-08-21 智能设备、微透镜阵列投影装置及其阵列基板 WO2022036708A1 (zh)

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US5150138A (en) * 1990-02-26 1992-09-22 Sharp Kabushiki Kaisha Projection type image display apparatus
CN102282500A (zh) * 2009-01-22 2011-12-14 索尼公司 空间图像显示装置
CN107121880A (zh) * 2017-07-04 2017-09-01 深圳市微阵技术有限公司 一种动态图像投影系统
CN109557666A (zh) * 2017-09-27 2019-04-02 蒋晶 近眼光学成像系统、近眼显示装置及头戴式显示装置
CN111176056A (zh) * 2020-01-21 2020-05-19 北京耐德佳显示技术有限公司 一种适用于短距离场景的集成投影成像光学系统
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5150138A (en) * 1990-02-26 1992-09-22 Sharp Kabushiki Kaisha Projection type image display apparatus
CN102282500A (zh) * 2009-01-22 2011-12-14 索尼公司 空间图像显示装置
CN107121880A (zh) * 2017-07-04 2017-09-01 深圳市微阵技术有限公司 一种动态图像投影系统
CN109557666A (zh) * 2017-09-27 2019-04-02 蒋晶 近眼光学成像系统、近眼显示装置及头戴式显示装置
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