Lens assembly, display module and display device

Abstract

The application relates to the technical field of display, and provides a lens assembly, a display module and a display device. The convex part and the matching part are configured to be point contact in the contact state, and the first matching surface and the second matching surface are matched in the matching space, so that the two adjacent lenses can have a larger error allowance in the assembling process, and the two adjacent lenses have more assembling space. In addition, the two adjacent lenses can have at least three contact points by arranging at least three matching parts, so that the alignment between the two lenses is more favorable. Therefore, the assembling efficiency is improved, the problems of lens deviation and deformation caused by machining errors and assembling errors are improved, the alignment accuracy of the lens assembly is improved, and the optical defects of the lens assembly are improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to lens assemblies, display modules and display devices. Background Technology

[0002] In the assembly of multiple lenses, corresponding positioning structures are typically installed on the lenses to reduce misalignment. However, due to manufacturing errors in these positioning structures and assembly errors during the assembly process, misalignment still exists between the lenses. Furthermore, with these manufacturing and assembly errors present, the assembled lens assembly is prone to deformation, leading to optical defects and affecting its usability. Summary of the Invention

[0003] Therefore, it is necessary to provide a lens assembly, a display module, and a display device to improve the alignment accuracy of the lens assembly and improve the optical defects of the lens assembly.

[0004] According to one aspect of this application, an embodiment of this application provides a lens assembly including a plurality of lenses, the plurality of lenses being sequentially attached along a first direction, the first direction being parallel to each other with the central axis of the lens assembly;

[0005] Define one of any two adjacent lenses as the first lens and the other as the second lens; the first lens has a protrusion on the side facing the second lens, the protrusion is arranged around the edge of the first lens and defines a mating space; the second lens has at least three mating parts on the side facing the first lens, all of the mating parts are arranged around the edge of the second lens, and at least a portion of the mating parts are located within the mating space;

[0006] The protrusion has a first mating surface located within the mating space, and the mating portion has a second mating surface located at least partially within the mating space, wherein the first mating surface and the second mating surface are configured to make point contact.

[0007] In one embodiment, the point on the second mating surface that contacts the corresponding first mating surface is defined as the contact point;

[0008] The center of the pattern formed by connecting all the contact points sequentially along the circumference of the corresponding second lens is located on the central axis.

[0009] In one embodiment, three mating portions are provided on the same second lens.

[0010] In one embodiment, all the mating portions located on the same second lens are configured to be arranged at equal intervals along the circumference of the second lens.

[0011] In one embodiment, the mating part is constructed as at least a portion of a sphere.

[0012] In one embodiment, the radius of the sphere is 1.5 mm to 2 mm.

[0013] In one embodiment, the first mating surface has a first edge connected to the corresponding first lens and a second edge disposed opposite to the first edge; the first edge is closer to the central axis than the second edge.

[0014] The point on the second mating surface that contacts the corresponding first mating surface is defined as the contact point, the plane passing through the central axis and the contact point is defined as the reference surface, and the line connecting the two more adjacent intersection points of the reference surface with the first edge and the second edge is defined as the reference line.

[0015] The reference line is set at a preset angle to the central axis.

[0016] In one embodiment, the preset angle is 30 to 45 degrees.

[0017] In one embodiment, the first mating surface includes multiple sub-matting surfaces, which are sequentially connected to form an annular surface; the number of sub-matting surfaces is the same as the number of mating parts.

[0018] Along the circumferential direction of the first lens, each of the sub-mating surfaces has a starting edge connected to the previous sub-mating surface and a terminating edge connected to the next sub-mating surface;

[0019] The preset angle corresponding to the starting edge of the sub-mating surface is equal to the preset angle corresponding to the ending edge of the sub-mating surface.

[0020] In one embodiment, the preset angle corresponding to the portion of the sub-mating surface located between the starting edge and the ending edge is not equal to the preset angle corresponding to the starting edge and the ending edge.

[0021] In one embodiment, along the circumference of the first lens, the preset angle corresponding to the sub-fitting surface first increases and then decreases from the starting edge to the ending edge.

[0022] In one embodiment, along the circumference of the first lens, the preset angle corresponding to the sub-fitting surface gradually increases and then gradually decreases from the starting edge to the ending edge.

[0023] In one embodiment, the sub-mating surface has a middle edge located between the starting edge and the ending edge;

[0024] The extension length of the sub-mating surface from the starting edge to the middle edge is equal to the extension length of the sub-mating surface from the middle edge to the ending edge.

[0025] The preset angle corresponding to the middle edge is the maximum preset angle.

[0026] In one embodiment, the intersection line between the reference surface and the first mating surface is a reference intersection line, which is constructed as a straight line.

[0027] In one embodiment, one of the first lens and the second lens has a positioning portion on the side facing the other;

[0028] The positioning part extends along the first direction, and the first lens and the second lens are fixed relative to each other in the first direction by means of the positioning part.

[0029] In one embodiment, the positioning part has a positioning surface that abuts against the other of the first lens and the second lens, and the other of the first lens and the second lens has an abutment surface that cooperates with the positioning surface;

[0030] At least a portion of the positioning surface abuts against the abutting surface.

[0031] In one embodiment, the positioning surface is configured as a plane perpendicular to the first direction.

[0032] In one embodiment, the contact surface is configured as a plane perpendicular to the first direction.

[0033] In one embodiment, three positioning portions are provided on the same lens.

[0034] In one embodiment, multiple positioning portions are provided on the same lens;

[0035] All the positioning parts located on the same lens are arranged at equal intervals along the circumference of the lens.

[0036] In one embodiment, the positioning part is located within the mating space; or

[0037] The positioning part is located outside the mating space.

[0038] In one embodiment, the lens is a curved lens; and / or

[0039] The outer contour of the lens projected onto the reference plane is circular, and the reference plane is a plane perpendicular to the first direction.

[0040] According to another aspect of this application, embodiments of this application provide a display module including the lens assembly in any of the above embodiments.

[0041] According to another aspect of this application, an embodiment of this application provides a display device including the display module in any of the above embodiments.

[0042] In the aforementioned lens assembly, display module, and display device, the lens assembly includes at least a plurality of lenses, which are sequentially bonded together along a first direction. A protrusion is provided on one of two adjacent lenses, and a mating portion mates with the protrusion on the other lens. The protrusion defines a mating space and has a first mating surface located within the mating space. The mating portion has a second mating surface at least partially located within the mating space. By configuring the first and second mating surfaces to be in point contact during contact, and by ensuring that the first and second mating surfaces mate within the mating space, a larger tolerance for error is allowed during the assembly of adjacent lenses, resulting in more assembly space for the adjacent lenses. Furthermore, by providing at least three mating portions, adjacent lenses can have at least three contact points, which further facilitates alignment between the two lenses. Therefore, with more assembly space for adjacent lenses and easier alignment, not only is assembly efficiency improved, but the problems of lens misalignment and deformation caused by processing and assembly errors are also mitigated, improving the alignment accuracy of the lens assembly and reducing optical defects.

[0043] Additional aspects and advantages of embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of this application. Attached Figure Description

[0044] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0045] Figure 1 This is a schematic diagram of the structure of a lens assembly in one embodiment of the related technology.

[0046] Figure 2 for Figure 1 A magnified schematic diagram of the part where the two lenses meet.

[0047] Figure 3This is a schematic diagram of the structure of three lenses assembled together in one embodiment of the related technology.

[0048] Figure 4 This is a three-dimensional structural diagram of the lens assembly in one embodiment of this application.

[0049] Figure 5 for Figure 4 A top view of the structure of the first lens in the lens assembly.

[0050] Figure 6 for Figure 4 A schematic diagram of the upward-viewing structure of the second lens in the lens assembly.

[0051] Figure 7 for Figure 4 A magnified partial cross-sectional view of the lens assembly 100 from one angle.

[0052] Figure 8 for Figure 4 A magnified partial cross-sectional view of the lens assembly 100 from another perspective.

[0053] Figure 9 for Figure 4 A schematic diagram of the structure in which the convex part T and the mating part P mate in the lens assembly 100.

[0054] Figure 10 for Figure 4 A partial cross-sectional three-dimensional structural diagram of the first lens in the lens assembly from a top-down perspective.

[0055] Figure 11 for Figure 4 A partial cross-sectional three-dimensional structural diagram of the first lens in the lens assembly from an upward viewing angle.

[0056] Figure 12 for Figure 4 A partial cross-sectional three-dimensional structural diagram of the first lens in the lens assembly from the main viewing angle.

[0057] Figure 13 for Figure 4 A schematic diagram of the structure of the first lens in the lens assembly from a top-down perspective.

[0058] Figure 14 for Figure 4 A schematic diagram of the structure in which the first mating surface and the second mating surface are in the first mating state in the lens assembly.

[0059] Figure 15 for Figure 14 A partial cross-sectional view of the lens assembly 100 when the first mating surface and the second mating surface are in the first mating state.

[0060] Figure 16 for Figure 4 A schematic diagram of the structure in which the first mating surface and the second mating surface are in a second mating state in a lens assembly.

[0061] Figure 17 for Figure 16 A partial cross-sectional view of the lens assembly when the first mating surface and the second mating surface are in the second mating state.

[0062] Figure 18 for Figure 4 A schematic diagram of the structure in which the first mating surface and the second mating surface are in a third mating state in the lens assembly.

[0063] Figure 19 for Figure 18 A partial cross-sectional view of the lens assembly when the first mating surface and the second mating surface are in the third mating state.

[0064] Figure 20 for Figure 12 A magnified view of a portion of point K.

[0065] Figure 21 This is a partial cross-sectional magnified structural diagram of a lens assembly according to another embodiment of this application.

[0066] Figure 22 for Figure 21 A three-dimensional structural diagram of the first lens.

[0067] Figure 23 This is a schematic diagram of the lens assembly in another embodiment of this application.

[0068] Figure 24 for Figure 23 A schematic diagram of the exploded structure of the lens assembly from one viewpoint.

[0069] Figure 25 for Figure 23 A schematic diagram of the exploded structure of the lens assembly from another perspective.

[0070] Figure 26 for Figure 23 A cross-sectional view of the lens assembly.

[0071] Figure 27 for Figure 26 A magnified schematic diagram of the structure at point U in the middle.

[0072] Figure 28 for Figure 26 A magnified schematic diagram of the structure at point V in the middle.

[0073] Figure 29This is a partial cross-sectional magnified structural diagram of a pair of lens components bonded together with optical adhesive in this application.

[0074] Figure 30 This is a partial cross-sectional magnified structural diagram of the lens assembly after it has been bonded together with optical adhesive in one embodiment of this application.

[0075] Figure 31 A schematic diagram of the structure for bonding the first and second lenses using a bonding device.

[0076] Explanation of reference numerals in the attached figures:

[0077] Lens assembly 1, lenses 1a, 1b, 1c, convex part n1, concave part n2, optical adhesive g;

[0078] Lens assembly 100, first lens 110, second lens 120, third lens 130;

[0079] Convex part T, mating space q, first mating surface m1, sub-matting surface m11, starting edge b1, middle edge b2, ending edge b3, first edge y1, second edge y2;

[0080] Mating part P, second mating surface m2;

[0081] Positioning part D, positioning surface m3, contact surface m4;

[0082] Contact point c, central axis L1, reference plane E1, reference line L2, reference intersection line L3, first intersection point j1, second intersection point j2, preset angle α, first direction F1, reference plane E2.

[0083] First dimension h1, second dimension h2, radius R, gap x;

[0084] The bonding device 200, the pressure head 210, the carrier 220, the initial position IP, the ready position RP, the contact position FC, and the final position FG. Detailed Implementation

[0085] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0086] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0087] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0088] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0089] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0090] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0091] Lens assemblies are widely used in various technical fields that require imaging. Taking the display technology field as an example, in order to obtain better display effects, the optical axes of each lens in the lens assembly need to be aligned with each other as much as possible, that is, to improve the alignment accuracy between the lenses.

[0092] Figure 1 A schematic diagram of the structure of lens assembly 1 in one embodiment of the related art is shown; Figure 2 It shows Figure 1 A magnified schematic diagram of the part where the two lenses (lens 1a and lens 1b) meet; Figure 3 A schematic diagram of the structure of three lenses (lens 1a, lens 1b and lens 1c) assembled together is shown in one embodiment of the related technology; for ease of explanation, only the content related to the embodiment of the related technology is shown.

[0093] Please refer to Figure 1 In one embodiment of the related technology, the lens assembly 1 includes a lens 1a and a lens 1b bonded together by means of an optical adhesive g. For example... Figure 2 As shown, lens 1a has a protrusion n1, and lens 1b has a recess n2 that matches the protrusion n1. Lens 1a and lens 1b are positioned by means of the matching protrusion n1 and recess n2.

[0094] During the above process, due to processing errors, such as Figure 2 As shown by the dotted line, the dimensions of the convex part n1 are either too large or too small, and the two corners at the bottom of the concave part n2 are also either too large or too small, leading to the following situations: (1) A gap is generated between the convex part n1 and the concave part n2, and the lens 1a and lens 1b cannot be effectively positioned, still posing a risk of misalignment; (2) Due to assembly errors during the assembly process, and the inability of the convex part n1 and the concave part n2 to be effectively positioned and fitted, if the lens 1a and lens 1b are forcibly assembled, it may cause deformation of the lens 1a and lens 1b. Figure 3As indicated by the middle arrow, when lens assembly 1 also includes lens 1c, or even more other lenses, the resulting offset or the aforementioned deformation will be even greater. Therefore, the assembled lens assembly 1 suffers from optical defects due to offset, deformation, etc., thus affecting the use of the lens assembly and failing to achieve the desired imaging effect.

[0095] Based on this, in order to solve at least some of the above problems, the embodiments of this application improve the positioning method and positioning structure between lenses to improve the alignment accuracy of the lens assembly and improve the optical defects of the lens assembly.

[0096] Figure 4 A three-dimensional structural schematic diagram of the lens assembly 100 in one embodiment of this application is shown; Figure 5 It shows Figure 4 A top view of the structure of the first lens 110 in the lens assembly 100; Figure 6 It shows Figure 4 A bottom-view structural diagram of the second lens 120 in the lens assembly 100; for ease of explanation, only the content related to the embodiments of this application is shown.

[0097] In some embodiments, please refer to Figure 4 This application provides a lens assembly 100, including a first lens 110 and a second lens 120, which are sequentially attached along a first direction F1. The first direction F1 is parallel to the central axis L1 of the lens assembly 100. Figure 4 For example, this illustrates the case where the first direction F1 is vertical. (Refer to the reference...) Figure 5 The first lens 110 has a protrusion T on the side facing the second lens 120. The protrusion T surrounds the edge of the first lens 110 and defines a mating space q. (Refer to reference) Figure 6 The second lens 120 has at least three mating parts P on the side facing the first lens 110, and all mating parts P are arranged around the edge of the second lens 120.

[0098] Figure 7 It shows Figure 4 A magnified partial cross-sectional view of the lens assembly 100 from one angle; Figure 8 It shows Figure 4 A magnified partial cross-sectional view of the lens assembly 100 from another perspective; Figure 9 It shows Figure 4 A schematic diagram of the structure of the lens assembly 100 in which the convex part T and the mating part P cooperate; for ease of explanation, only the content related to the embodiments of this application is shown.

[0099] Combined with reference Figures 7 to 8At least a portion of the mating part P is located within the mating space q. The protrusion T has a first mating surface m1 located within the mating space q, and the mating part P has a second mating surface m2 located at least partially within the mating space q. The first mating surface m1 and the second mating surface m2 are configured to make point contact. It should be noted that point contact means that the contact area of ​​the first mating surface m1 and the second mating surface m2 can be approximately considered as a point.

[0100] It is understandable that, since the mating space q is defined by the protrusion T surrounding the edge of the first lens 110, the restriction imposed on the mating portion P is less than that imposed on the degrees of freedom in multiple directions by the concave portion n2 in related technologies. Furthermore, the first mating surface m1 and the second mating surface m2 are in point contact when in contact, allowing for a larger tolerance for error between the first lens 110 and the second lens 120, thus providing more assembly space for the first lens 110 and the second lens 120. In other words, as... Figure 9 As shown, even if there may be a gap x between the first mating surface m1 and the second mating surface m2, the alignment between the first mating surface m1 and the second mating surface m2 is still facilitated under the conditions of a larger error tolerance and point contact. Furthermore, by providing at least three mating portions P, the first lens 110 and the second lens 120 can have at least three contact points c. Combined with the aforementioned increased assembly space, it is more advantageous to adjust the positioning posture between the first lens 110 and the second lens 120 by utilizing the cooperation between the protrusion T and the mating portion P, thus facilitating the alignment between the two lenses.

[0101] It should also be noted that the position of contact point c is determined by the adjusted positioning posture between the first lens 110 and the second lens 120. However, the protrusion T and the mating part P always maintain point contact in the contact state.

[0102] Therefore, through the cooperation between the mating part P and the protrusion T, it is not only convenient for the first lens 110 and the second lens 120 to be aligned with each other, thus improving the assembly efficiency, but also improves the problem of lens offset and deformation caused by processing errors and assembly errors, thereby improving the alignment accuracy of the lens assembly 100 and improving the optical defects of the lens assembly 100.

[0103] In some embodiments, please continue to refer to Figure 6 and in conjunction with reference Figure 8 Let c be the point on the second mating surface m2 that contacts the corresponding first mating surface m1. The center of the figure formed by connecting all contact points c sequentially along the circumference of the second lens 120 lies on the central axis L1. Figure 6For example, the diagram illustrates a scenario where there are three mating parts P. Correspondingly, there are also three contact points c. The shape formed by connecting the three contact points c sequentially along the circumference of the second lens 120 is a triangle, with the center of the triangle located on the central axis L1. In this way, the mutual cooperation between the mating parts P facilitates the positioning of the second lens 120.

[0104] It should be noted that the number of mating parts P can also be four, five, or other numbers. Having three mating parts P not only facilitates the manufacture of the mating parts P but also helps to reduce the impact of machining and assembly errors caused by a larger number of mating parts P. Furthermore, compared to other numbers of mating parts P, since three points can determine a center, it is easier to align the first lens 110 and the second lens 120. Of course, provided that four, five, or other numbers of mating parts P can meet the positioning requirements, the number of mating parts P can also be chosen to be four, five, or other numbers; this application embodiment does not impose specific limitations on this.

[0105] In some embodiments, please continue to refer to Figure 6 All mating parts P on the second lens 120 are arranged at equal intervals along the circumference of the second lens 120. In this way, the uniformly arranged mating parts P not only facilitate the alignment between the first lens 110 and the second lens 120, but also help improve the stability of the assembly process.

[0106] In some embodiments, please continue to refer to Figure 6 and in conjunction with reference Figures 7 to 9 The mating part P is constructed as at least a portion of a sphere. That is, the mating part P can be half a sphere, a quarter a sphere, a two-thirds a sphere, or a complete sphere. It can be configured according to specific usage, and the embodiments of this application do not impose specific limitations on it.

[0107] It is understandable that since each point on the surface of the sphere is in a different position in space, it is easier to achieve point mating between the first mating surface m1 and the second mating surface m2. Furthermore, when adjusting the relative posture of the first lens 110 and the second lens 120, it is easier to maintain point contact between the first lens 110 and the second lens 120, which is also more conducive to the alignment between the first lens 110 and the second lens 120.

[0108] Through in-depth research, the inventors of this application discovered that the smaller the size of the protrusion T, the greater the stress generated, and consequently, the more prone the lens is to cracking during assembly. It is understood that, as mentioned earlier, due to the presence of a fitting space q in the embodiments of this application, the restrictions on the protrusion T are less, and therefore, compared to some of the aforementioned related technologies, this application offers greater control over the size of the protrusion T. Therefore, in some embodiments, please continue to refer to... Figure 8 and Figure 9 Based on the structure illustrated in the embodiments of this application, where the protrusion T and the mating part P cooperate, the radius R of the sphere can be set to 1.5 mm to 2 mm. For example, the radius R of the sphere can be 1.94 mm.

[0109] In some embodiments, please continue to refer to Figure 8 and Figure 9 The portion of the mating part P located within the mating space q has a first dimension h1 along the first direction F1, and the second dimension h2 is the dimension of the mating part P along the first direction F1. The ratio of the first dimension h1 to the second dimension h2 is 0.7 to 1. For example, when the radius R of the sphere is 1.94 mm, the first dimension h1 can be 1.27 mm. Thus, with the mating space q and the mating part P in cooperation, after the lens assembly 100 is assembled, the first lens 110 and the second lens 120 are less likely to detach, improving assembly stability.

[0110] Figure 10 It shows Figure 4 A partial cross-sectional three-dimensional structural diagram of the first lens 110 in the lens assembly 100 from a top-down perspective; Figure 11 It shows Figure 4 A partial cross-sectional three-dimensional structural diagram of the first lens 110 in the lens assembly 100 from an upward viewing angle; Figure 12 It shows Figure 4 A partial cross-sectional perspective view of the first lens 110 in the lens assembly 100 from the main viewing angle; for ease of explanation, only the content related to the embodiments of this application is shown, and in... Figures 10 to 12 The contact point c is shown in the diagram.

[0111] In some embodiments, please refer to Figures 10 to 12The first mating surface m1 has a first edge y1 connected to the first lens 110, and a second edge y2 opposite to the first edge y1. The first edge y1 is closer to the central axis L1 than the second edge y2. The point on the second mating surface m2 that contacts the corresponding first mating surface m1 is defined as contact point c. The plane passing through the central axis L1 and contact point c is defined as reference surface E1. The line connecting the two more adjacent intersection points (i.e., the first intersection point j1 and the second intersection point j2) of reference surface E1 with the first edge y1 and the second edge y2 is defined as reference line L2. Reference line L2 is set at a preset angle α with the central axis L1. That is, the first mating surface m1 is inclined relative to the central axis L1, which not only adapts to the required point contact mating method but also further expands the mating space q, obtaining a larger error tolerance when mating with the mating part P.

[0112] In some embodiments, please continue to refer to Figures 10 to 12 The preset angle α is between 30 and 45 degrees. For example, the preset angle α can be 30, 35, 40, 42, or 45 degrees. For instance, the preset angle α can be 45°. This can improve the situation where it is difficult to assemble due to an excessively large angle or difficult to move the first lens 110 due to an excessively small angle.

[0113] Figure 13 It shows Figure 4 A schematic diagram of the structure of the first lens 110 in the lens assembly 100 from a top-down view; for ease of explanation, only the content related to the embodiments of this application is shown. Because Figure 13 This is a top view, so the mating surface m11 is shown as a dashed line.

[0114] In some embodiments, please refer to Figure 13 and in conjunction with reference Figure 11 The first mating surface m1 includes multiple sub-matting surfaces m11, which are sequentially connected to form an annular surface. The number of sub-matting surfaces m11 is the same as the number of mating parts P. Figure 13 This illustration shows the case where there are three mating parts P and three sub-mating surfaces m11, with the first mating surface m1 divided into three segments of equal length.

[0115] Furthermore, along the circumference of the first lens 110, each sub-mating surface m11 has a starting edge b1 connected to the preceding sub-mating surface m11 and a ending edge b3 connected to the following sub-mating surface m11. The preset angle α corresponding to the starting edge b1 of the sub-mating surface m11 is equal to the preset angle α corresponding to the ending edge b3 of the sub-mating surface m11. The illustration of the preset angle α can be referred to in some of the aforementioned embodiments. Furthermore, the preset angle α corresponding to the portion of the sub-mating surface m11 located between the starting edge b1 and the ending edge b3 is not equal to the preset angle α corresponding to the starting edge b1 and the ending edge b3. In this way, a varying preset angle α can be formed, which is beneficial to compensate for processing errors by utilizing the changing trend of the first mating surface m1, further improving the assemblability of the first mating surface m1 and the second mating surface m2, as well as the alignment accuracy of the first lens 110 and the second lens 120.

[0116] In some embodiments, please continue to refer to Figure 13 Along the circumference of the first lens 110, the preset angle α corresponding to the sub-mating surface m11 first increases and then decreases from the starting edge b1 to the ending edge b3. In one embodiment, along the circumference of the first lens 110, the preset angle α corresponding to the sub-mating surface m11 gradually increases and then gradually decreases from the starting edge b1 to the ending edge b3. Thus, by constructing a continuously changing preset angle α, it is more beneficial to improve the alignment accuracy of the first lens 110 and the second lens 120.

[0117] For specific embodiments, please refer to... Figure 13 The sub-mating surface m11 has a middle edge b2 located between the starting edge b1 and the ending edge b3. The extension length of the sub-mating surface m11 from the starting edge b1 to the middle edge b2 is equal to the extension length of the sub-mating surface m11 from the middle edge b2 to the ending edge b3. The preset angle α corresponding to the middle edge b2 is the maximum preset angle. For example, the maximum preset angle can be 1 degree larger than the minimum preset angle. In this way, by constructing a more regularly varying preset angle α, the alignment accuracy of the first lens 110 and the second lens 120 is further improved while facilitating adjustment.

[0118] Figure 14 It shows Figure 4 A schematic diagram of the first mating surface m1 and the second mating surface m2 in the first mating state in the lens assembly 100; Figure 15 It shows Figure 14 A partial cross-sectional view of the lens assembly 100 when the first mating surface m1 and the second mating surface m2 are in the first mating state; Figure 16 It shows Figure 4 A schematic diagram of the first mating surface m1 and the second mating surface m2 in the second mating state in the lens assembly 100; Figure 17 It shows Figure 16 A partial cross-sectional view of the lens assembly 100 when the first mating surface m1 and the second mating surface m2 are in the second mating state; Figure 18 It shows Figure 4 A schematic diagram of the structure of the lens assembly 100 in which the first mating surface m1 and the second mating surface m2 are in a third mating state; Figure 19 It shows Figure 18 A partial cross-sectional view of the lens assembly 100 when the first mating surface m1 and the second mating surface m2 are in the third mating state; for ease of explanation, only the content related to the embodiments of this application is shown. Figure 14 , Figure 16 and Figure 18 The location of the mating part P is shown in the diagram. Figure 17 and Figure 19 The first mating surface m1 is indicated by a dashed line.

[0119] As you can see, Figure 16 and Figure 17 The second coordination state shown is relatively... Figure 14 and Figure 15 The first mating state shown has rotated a certain angle clockwise, but not exceeding the middle edge b2 mentioned in some of the aforementioned embodiments, that is, Figure 17 The corresponding preset angle α ratio Figure 15 The corresponding preset angle α is larger. Figure 18 and Figure 19 The third coordination state shown is relatively... Figure 16 and Figure 17 The illustrated second mating state has rotated a certain angle clockwise, and exceeds the middle edge b2 mentioned in some of the aforementioned embodiments, that is, Figure 19 The corresponding preset angle α ratio Figure 15 and Figure 17 The corresponding preset angle α is smaller. That is, when there is relative rotation between the first lens 110 and the second lens 120, the three mating parts P are respectively mated with the first mating surface m1 with different preset angles α. By using the compensation of the tilt angle of the first mating surface m1, the required alignment is achieved and the alignment accuracy is further improved.

[0120] It is understood that the preset angle α and the trend of its change can be adjusted according to actual use. The above embodiments are only illustrations of how to use the tilt angle to achieve the compensation process and do not constitute a limitation. In addition, since the first mating surface m1 is an annular surface, when the corresponding preset angle α presents the required trend of change, it can be combined with the aforementioned point contact method, supplemented by the rotation between the first lens 110 and the second lens 120, to achieve optical axis-free alignment and achieve a higher precision compensation effect.

[0121] Figure 20 It shows Figure 12 A magnified view of a portion of point K; for ease of explanation, only the content relevant to the embodiments of this application is shown.

[0122] In some embodiments, please continue to refer to Figure 12 and in conjunction with reference Figure 20 The intersection line of the reference surface E1 and the first mating surface m1 is the reference intersection line L3, which is constructed as a straight line. Of course, in some other embodiments, the reference intersection line L3 can also be constructed as a curve. It can be understood that when the reference intersection line L3 is constructed as a straight line, it is more conducive to achieving point contact between the first mating surface m1 and the second mating surface m2.

[0123] In some embodiments, please continue to refer to Figure 5 A positioning part D is provided on the side of the first lens 110 facing the second lens 120. (Refer to reference...) Figure 7 and Figure 8 The positioning part D extends along the first direction F1, and the first lens 110 and the second lens 120 are fixed relative to each other in the first direction F1 by means of the positioning part D. That is, during the assembly of the first lens 110 and the second lens 120, the positioning part D will first contact the second lens 120 to achieve relative fixation of the first lens 110 and the second lens 120 in the first direction F1. Subsequently, the alignment between the first lens 110 and the second lens 120 is achieved by the mutual cooperation between the mating part P and the protrusion T.

[0124] It is understandable that because the positioning part D enables the first lens 110 and the second lens 120 to be relatively fixed in the first direction F1, the subsequent adjustment process using the mating part P and the convex part T can be faster and more accurate, which not only further saves alignment time and improves assembly efficiency, but also improves alignment accuracy.

[0125] For specific embodiments, please refer to... Figure 9 Through the mating relationship between the mating part P and the convex part T, a gap x can be allowed between the first mating surface m1 and the second mating surface m2. For example, in some of the aforementioned embodiments, when the radius R of the sphere is 1.94 mm, the preset angle α is 45 degrees, and the first dimension h1 is 1.27 mm, the shortest distance of the gap x can be 0.0356 mm, which is more conducive to the positioning of the first lens 110 and the second lens 120 in the first direction F1 by means of the positioning part D. Of course, after positioning in the first direction F1, each mating part P and the convex part T mate to achieve point contact between the first mating surface m1 and the second mating surface m2.

[0126] In some embodiments, please continue to refer to Figure 8The positioning part D has a positioning surface m3 that abuts against the second lens 120, and the second lens 120 has an abutting surface m4 that mates with the positioning surface m3. At least a portion of the positioning surface m3 abuts against the abutting surface m4. Further, the positioning surface m3 is configured as a plane perpendicular to the first direction F1; of course, the abutting surface m4 can also be configured as a plane perpendicular to the first direction F1. For example, using... Figure 8 and Figure 9 For example, the contact surface m4 and the second mating surface m2 can be smoothly connected.

[0127] This makes it easier to achieve the aforementioned positioning of the first lens 110 and the second lens 120 in the first direction F1.

[0128] In some embodiments, please continue to refer to Figure 8 The first lens 110 has three positioning parts D. This not only facilitates positioning but also reduces processing errors caused by an excessive number of positioning parts D.

[0129] In some embodiments, please continue to refer to Figure 5 The first lens 110 has multiple positioning parts D, and all the positioning parts D on the first lens 110 are arranged at equal intervals along the circumference of the first lens 110. This is more conducive to improving the stability of the positioning process.

[0130] Figure 21 This paper shows a partially enlarged cross-sectional view of a lens assembly 100 according to another embodiment of the present application; Figure 22 It shows Figure 21 A three-dimensional structural schematic diagram of the first lens 110; for ease of explanation, only the content related to the embodiments of this application is shown.

[0131] In some embodiments, please continue to refer to Figure 7 and Figure 8 The positioning part D is located within the mating space q. In other embodiments, please refer to... Figure 21 and Figure 22 The positioning part D is located outside the mating space q. Of course, the positioning part D can also be provided on the second lens 120. It can be set according to the specific use case, as long as the relative fixation of the first lens 110 and the second lens 120 in the first direction F1 can be achieved. This application embodiment does not impose specific limitations on this.

[0132] In some embodiments, please continue to refer to Figures 4 to 6 The first lens 110 and the second lens 120 are curved lenses. In other embodiments, please refer to... Figure 5 and Figure 6The outer contour of the lens's orthographic projection onto the reference plane E2 is circular, and the reference plane E2 is a plane perpendicular to the first direction F1. Thus, when aligning curved lenses is more difficult, the positioning method and structure described in this embodiment can help improve alignment accuracy.

[0133] Figure 23 A schematic diagram of the structure of the lens assembly 100 in another embodiment of this application is shown; Figure 24 It shows Figure 23 A schematic diagram of the exploded structure of the lens assembly 100 in one view; Figure 25 It shows Figure 23 A schematic diagram of the exploded structure of the lens assembly 100 from another perspective; Figure 26 It shows Figure 23 A cross-sectional view of the lens assembly 100. Figure 27 It shows Figure 26 A magnified schematic diagram of the local structure at point U; Figure 28 It shows Figure 26 A magnified schematic diagram of the structure at point V in the middle; for ease of explanation, only the content related to the embodiments of this application is shown.

[0134] It is understood that the above embodiments only illustrate the case of a lens assembly 100 consisting of two lenses. The number of lenses in the lens assembly 100 can also be three, four, or other numbers, and this application embodiment does not impose specific limitations on this. Figures 23 to 25 As shown, the lens assembly 100 includes a first lens 110, a second lens 120, and a third lens 130, which are sequentially attached along a first direction F1. Figures 26 to 28 As shown, some positioning parts D are located within the mating space q, while others are located outside the mating space q. The corresponding positions of the protrusion T, mating part P, and positioning part D can be set according to the specific usage, as long as the cooperation of the three can achieve the requirements of some of the above embodiments. This application does not impose specific limitations on this.

[0135] It should be noted that adjacent lenses in the lens assembly 100 can be bonded together using optical adhesive. The optical adhesive is not shown in the accompanying drawings.

[0136] Figure 29 This shows a partial cross-sectional magnified structural diagram of a pair of lens assemblies 100 bonded together with optical adhesive g in this application; Figure 30 This diagram shows a partial cross-sectional enlarged view of the lens assembly 100 after it has been bonded together with optical adhesive g according to one embodiment of this application; for ease of explanation, only the content related to the embodiment of this application is shown.

[0137] like Figure 29 As shown, without the protrusion T and the mating part P, when the first lens 110 and the second lens 120 are attached, the optical adhesive g located between the first lens 110 and the second lens 120 will overflow at the edges of the first lens 110 and the second lens 120. After the protrusion T and the mating part P are provided, as shown... Figure 30 As shown, the first mating surface m1 of the protrusion T can form a barrier, improving the overflow situation. Furthermore, since the optical adhesive g can be confined within the mating space q, the layer formed by the optical adhesive g can be more uniform.

[0138] The lens assembly 100 provided in this application will be described exemplarily below with reference to the contents illustrated in some of the above embodiments and the related drawings.

[0139] like Figure 31 As shown, Figure 31 A schematic diagram of the bonding device 200 used to bond a first lens 110 and a second lens 120 is shown. The bonding device 200 includes a pressure head 210 for carrying the first lens 110 and a carrier 220 for carrying the second lens 120. The bonding process is divided into three stages. In the first stage, the pressure head 210 moves the first lens 110 from the initial position IP to the ready position RP at a speed of 10 mm / s. In the second stage, it moves from the ready position RP to the contact position FC at a preset speed. In the third stage, it moves from the contact position FC to the final position FG at a speed of 0.05 mm / s. Experimental results are shown in Table 1.

[0140] Table 1

[0141]

[0142] As shown in Table 1, the embodiments of this application have excellent insertion space (i.e. error tolerance) and the shortest pressing time, which facilitates the production of each component, facilitates assembly, and makes the overall structure more stable.

[0143] Based on the same inventive concept, this application also provides a display module, including the lens assembly in any of the above embodiments. The display module also possesses the advantages of the lens assembly in any of the above embodiments, and will not be repeated here.

[0144] Based on the same inventive concept, this application also provides a display device, including the display module in any of the above embodiments. The advantages of the display module in any of the above embodiments are also present in the display device, and will not be repeated here.

[0145] It should be noted that the aforementioned display devices can be applied to fields such as mobile terminals, bionic electronics, electronic skin, wearable devices, automotive devices, Internet of Things (IoT) devices, and artificial intelligence (AI) devices. For example, the aforementioned display devices can be mobile terminals, tablets, PDAs, iPods, smartwatches, laptops, televisions, monitors, virtual reality (VR) or augmented reality (AR) devices, etc.

[0146] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0147] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A lens assembly, characterized in that, It includes multiple lenses, which are sequentially attached along a first direction, the first direction being parallel to the central axis of the lens assembly; Define one of any two adjacent lenses as the first lens and the other as the second lens; the first lens has a protrusion on the side facing the second lens, the protrusion is arranged around the edge of the first lens and defines a mating space; the second lens has at least three mating parts on the side facing the first lens, all of the mating parts are arranged around the edge of the second lens, and at least a portion of the mating parts are located within the mating space; The protrusion has a first mating surface located within the mating space. The first mating surface is the inner wall surface of the protrusion and is an annular surface. The mating part has a second mating surface located at least partially within the mating space. The second mating surface is the side peripheral surface of the mating part. The first mating surface and the second mating surface are in contact with each other in the radial direction, and the first mating surface and the second mating surface are configured to make point contact.

2. The lens assembly according to claim 1, characterized in that, The point on the second mating surface that contacts the corresponding first mating surface is defined as a contact point; the center of the pattern formed by connecting all the contact points sequentially along the circumference of the corresponding second lens is located on the central axis; and / or The mating portions located on the same second lens are provided in three parts; and / or All the mating parts located on the same second lens are configured to be arranged at equal intervals along the circumference of the second lens.

3. The lens assembly according to claim 1, characterized in that, The mating part is constructed as at least a portion of a sphere.

4. The lens assembly according to claim 3, characterized in that, The radius of the sphere is 1.5 mm to 2 mm.

5. The lens assembly according to any one of claims 1-4, characterized in that, The first mating surface has a first edge connected to the corresponding first lens and a second edge disposed opposite to the first edge; the first edge is closer to the central axis than the second edge; The point on the second mating surface that contacts the corresponding first mating surface is defined as the contact point, the plane passing through the central axis and the contact point is defined as the reference surface, and the line connecting the two more adjacent intersection points of the reference surface with the first edge and the second edge is defined as the reference line. The reference line is set at a preset angle to the central axis.

6. The lens assembly according to claim 5, characterized in that, The preset angle is between 30 and 45 degrees.

7. The lens assembly according to claim 5, characterized in that, The first mating surface includes multiple sub-matting surfaces, which are sequentially connected to form an annular surface; the number of sub-matting surfaces is the same as the number of mating parts. Along the circumferential direction of the first lens, each of the sub-mating surfaces has a starting edge connected to the previous sub-mating surface and a terminating edge connected to the next sub-mating surface; The preset angle corresponding to the starting edge of the sub-mating surface is equal to the preset angle corresponding to the ending edge of the sub-mating surface.

8. The lens assembly according to claim 7, characterized in that, The preset angle corresponding to the portion of the sub-mating surface located between the starting edge and the ending edge is not equal to the preset angle corresponding to the starting edge and the ending edge.

9. The lens assembly according to claim 8, characterized in that, Along the circumference of the first lens, the preset angle corresponding to the sub-mating surface first increases and then decreases from the starting edge to the ending edge.

10. The lens assembly according to claim 9, characterized in that, Along the circumference of the first lens, the preset angle corresponding to the sub-mating surface gradually increases and then gradually decreases from the starting edge to the ending edge.

11. The lens assembly according to claim 10, characterized in that, The sub-mating surface has a middle edge located between the starting edge and the ending edge; The extension length of the sub-mating surface from the starting edge to the middle edge is equal to the extension length of the sub-mating surface from the middle edge to the ending edge. The preset angle corresponding to the middle edge is the maximum preset angle.

12. The lens assembly according to claim 5, characterized in that, The intersection line between the reference surface and the first mating surface is a reference intersection line, which is constructed as a straight line.

13. The lens assembly according to any one of claims 1-4, characterized in that, A positioning part is provided on the side of the first lens and the second lens facing the other; The positioning part extends along the first direction, and the first lens and the second lens are fixed relative to each other in the first direction by means of the positioning part.

14. The lens assembly according to claim 13, characterized in that, The positioning part has a positioning surface that abuts against the other of the first lens and the second lens, and the other of the first lens and the second lens has an abutment surface that cooperates with the positioning surface; At least a portion of the positioning surface abuts against the abutting surface.

15. The lens assembly according to claim 14, characterized in that, The positioning surface is constructed as a plane perpendicular to the first direction; and / or The contact surface is constructed as a plane perpendicular to the first direction.

16. The lens assembly according to claim 13, characterized in that, Three positioning parts are provided on the same lens.

17. The lens assembly according to claim 13, characterized in that, Multiple positioning portions are provided on the same lens; all positioning portions on the same lens are arranged at equal intervals along the circumference of the lens; and / or The positioning part is located either inside or outside the mating space.

18. The lens assembly according to any one of claims 1-4, characterized in that, The lens is a curved lens; and / or The outer contour of the lens projected onto the reference plane is circular, and the reference plane is a plane perpendicular to the first direction.

19. A display module, characterized in that, Includes the lens assembly as described in any one of claims 1-18.

20. A display device, characterized in that, Includes the display module as described in claim 19.

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