Carrying fixture and bonding device

Abstract

The present application relates to the field of display technology, and embodiments of the present application provide a supporting fixture and a bonding device. By providing a first adjustment surface and a second adjustment surface, the tensile force of different areas of the optical film can be adjusted during the bonding of the optical film to the curved lens. By making the first preset angle corresponding to the first adjustment surface greater than the second preset angle corresponding to the second adjustment surface, the degree of adjustment of the tensile force of the corresponding area of ​​the optical film by the second adjustment surface is greater than the degree of adjustment of the tensile force of the corresponding area of ​​the optical film by the first adjustment surface, and thus different areas of the optical film can be adjusted separately. Thus, through the adjustment effects of both the first adjustment surface and the second adjustment surface, the situation of bubbles appearing in the optical module is improved, and the optical performance is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a carrying fixture and a laminating device. Background Art

[0002] In the related art, a desired optical module is usually formed by laminating a curved lens and an optical film. However, bubbles are easily generated in the optical module, thereby affecting the optical performance. Summary of the Invention

[0003] Based on this, it is necessary to provide a supporting fixture and a bonding device to improve the situation of bubbles appearing in the optical module and improve the optical performance.

[0004] According to one aspect of the present application, an embodiment of the present application provides a supporting jig for laminating a curved lens and an optical film, the supporting jig comprising:

[0005] A fixture body, the fixture body being provided with a bearing surface, a first adjustment surface surrounding an edge of the bearing surface and connected to the bearing surface, and a second adjustment surface surrounding an edge of the first adjustment surface and connected to the first adjustment surface;

[0006] The carrying surface is used to carry a curved lens, a side of the curved lens away from the carrying surface is used to bond the optical film, and the first adjustment surface and the second adjustment surface are used to carry a non-bonding portion of the optical film;

[0007] The first adjustment surface has a first edge connected to the bearing surface, and a second edge connected to the second adjustment surface; the second adjustment surface has a third edge connected to the first adjustment surface, and a fourth edge arranged opposite to the third edge;

[0008] defining a plane passing through the central axis of the bearing surface as a reference plane;

[0009] A line connecting two more adjacent intersections of the reference surface with the first edge and the second edge is a first reference line, and the first reference line is arranged at a first preset angle with the central axis;

[0010] A line connecting two more adjacent intersection points where the reference surface intersects the third edge and the fourth edge is a second reference line, and the second reference line is arranged at a second preset angle with the central axis;

[0011] The first preset angle is greater than the second preset angle.

[0012] In one embodiment, the reference surface intersects the bearing surface at a reference line, and a line passing through any intersection point of the reference line and the first edge and tangent to the reference line is a reference tangent line, and the reference tangent line is set at a reference angle to the central axis;

[0013] The first preset angle is greater than the reference angle and less than 90 degrees.

[0014] In one embodiment, the optical film is configured as an isotropic optical film;

[0015] All planes passing through the central axis of the bearing surface constitute a plane set; when any plane in the plane set is used as the reference plane, the any plane corresponds to a first preset angle, and each first preset angle is equal to each other.

[0016] In one embodiment, the optical film is configured as an anisotropic optical film, and the optical film has a first optical axis and a second optical axis that are perpendicular to each other;

[0017] A plane passing through the central axis of the bearing surface and the first optical axis is a first preset surface; when the first preset surface is used as the reference surface, the first preset angle corresponding to the first preset surface is a first target angle;

[0018] A plane passing through the central axis of the bearing surface and the second optical axis is a second preset surface; when the second preset surface is used as the reference surface, the first preset angle corresponding to the second preset surface is a second target angle;

[0019] The first target angle is not equal to the second target angle.

[0020] In one embodiment, a dimension of the optical film along the extending direction of the first optical axis is greater than a dimension of the optical film along the extending direction of the second optical axis;

[0021] The tensile coefficient of the optical film on the first optical axis is defined as δ1, and the tensile coefficient of the optical film on the second optical axis is defined as δ2; when the optical film is bonded to the curved lens, the tensile stress of the optical film on the first optical axis is defined as T1, and the tensile stress of the optical film on the second optical axis is defined as T2;

[0022] The first target angle w1 and the second target angle w2 satisfy the following conditions:

[0023] In one embodiment, the curved lens is configured as a spherical lens;

[0024] All planes passing through the central axis of the bearing surface constitute a plane set; when any plane in the plane set is used as the reference plane, the any plane corresponds to a second preset angle, and each second preset angle is equal to each other.

[0025] In one embodiment, the reference surface and the bearing surface intersect at a reference line, and the reference line is an arc;

[0026] The arc radius of the reference line is R0, and the second preset angle is arctanR0.

[0027] In one embodiment, the curved lens is configured as an aspherical lens;

[0028] All planes passing through the central axis of the bearing surface constitute a plane set; when any plane in the plane set is used as the reference plane, any plane corresponds to a second preset angle, and each second preset angle is not equal to each other.

[0029] In one embodiment, the reference surface intersects the bearing surface at a reference line, and the reference line is composed of multiple arc segments;

[0030] The radius of the arc at any intersection point where the reference line intersects the first edge is R c ;

[0031] The second preset angle corresponding to the second reference line adjacent to any intersection point is arctanR c .

[0032] In one embodiment, the reference surface intersects the first adjustment surface at a first preset line and a second preset line, and the first preset line and the second preset line are both straight lines.

[0033] In one embodiment, the reference surface intersects the second adjustment surface at a third preset line and a fourth preset line, and the third preset line and the fourth preset line are both straight lines.

[0034] In one embodiment, the jig body is further provided with a transition surface;

[0035] The transition surface is connected between the first adjustment surface and the second adjustment surface.

[0036] In one embodiment, the reference surface intersects the transition surface at a fifth preset line and a sixth preset line, and the fifth preset line and the sixth preset line are both straight lines.

[0037] In one embodiment, the fifth preset line and the sixth preset line are both perpendicular to the central axis.

[0038] According to another aspect of the present application, an embodiment of the present application provides a bonding device, including the supporting fixture in any of the above embodiments.

[0039] In the aforementioned supporting jig and bonding device, the supporting jig includes at least a jig body, which is provided with at least a supporting surface, a first adjustment surface, and a second adjustment surface. The first adjustment surface and the second adjustment surface are sequentially positioned outside the edge of the supporting surface. The provision of the first adjustment surface and the second adjustment surface allows for adjustment of the tensile force of different regions of the optical film during bonding between the optical film and the curved lens. Because the region of the optical film corresponding to the second adjustment surface is located outside the region of the optical film corresponding to the first adjustment surface, the region of the optical film corresponding to the second adjustment surface requires a greater degree of adjustment of the tensile force than the region of the optical film corresponding to the first adjustment surface. Therefore, by setting the first preset angle corresponding to the first adjustment surface to be greater than the second preset angle corresponding to the second adjustment surface, the degree of adjustment of the tensile force of the region of the optical film corresponding to the second adjustment surface is greater than the degree of adjustment of the tensile force of the region of the optical film corresponding to the first adjustment surface, thereby enabling adjustment of different regions of the optical film separately. Furthermore, the provision of the first adjustment surface also provides a transitional adjustment process for the second adjustment surface, facilitating the second adjustment surface's adjustment of the tensile force of the optical film's more peripheral regions and improving the reliability of the bonding process. Therefore, through the regulating effects of the first regulating surface and the second regulating surface, the situation where bubbles appear in the optical module is improved, and the optical performance is enhanced.

[0040] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0042] Figure 1 A schematic diagram of laminating a flat lens and an optical film in an embodiment of the related art;

[0043] Figure 2 It is a top view schematic diagram of a flat lens carried on a carrying fixture in an embodiment of the related art;

[0044] Figure 3 It is a schematic cross-sectional structural diagram of a supporting fixture in an embodiment of the related art;

[0045] Figure 4 This is a schematic diagram of the bonding of a curved lens and an optical film in one embodiment of the present application;

[0046] Figure 5 This is a schematic diagram of a top view of a supporting fixture in one embodiment of the present application;

[0047] Figure 6 for Figure 5 The cross-sectional structure diagram of the supporting fixture shown is shown with the reference plane as the cross-sectional plane;

[0048] Figure 7 This is a schematic diagram of a top view of an optical film in one embodiment of the present application;

[0049] Figure 8 This is a schematic diagram of a cross-sectional structure of a carrying fixture in an embodiment of the present application, with the first preset surface as the cross-sectional surface;

[0050] Figure 9 This is a schematic diagram of a cross-sectional structure of a supporting fixture in an embodiment of the present application, with the second preset surface as the cross-sectional surface;

[0051] Figure 10 This is a schematic diagram of a structure in which the reference line is an arc in one embodiment of the present application;

[0052] Figure 11 This is a schematic diagram of a structure in which the reference line is a plurality of arc segments in one embodiment of the present application;

[0053] Figure 12 for Figure 5 The cross-sectional structure diagram of the supporting fixture shown is along the cross-sectional direction e1-e1;

[0054] Figure 13 for Figure 5 The cross-sectional structure diagram of the supporting fixture shown is along the cross-sectional direction e2-e2;

[0055] Figure 14 for Figure 5 The cross-sectional structure diagram of the supporting fixture along the cross-sectional direction e3-e3 is shown.

[0056] Description of reference numerals:

[0057] Plane lens P, optical film F0, carrying fixture 10, carrying surface 11;

[0058] Curved lens G, optical film F, first optical axis z1, second optical axis z2, dimensions h1, h2;

[0059] Carrying fixture 100, fixture body 110, carrying surface C, reference line J, first segment J1, second segment J2, third segment J3, fourth segment J4, fifth segment J5, reference tangent T, arc centers O0, O1, O2, arc radii R0, R a、R b 、R c , first adjustment surface A1, first preset line q1, second preset line q2, first edge b1, second edge b2, second adjustment surface A2, third preset line q3, fourth preset line q4, third edge b3, fourth edge b4, transition surface D, fifth preset line q5, sixth preset line q6;

[0060] Central axis L0, reference plane E, intersection points j1, j2, j3, j4, j5, j6, j7, j8, first reference line L1, first preset angles α, α1, α2, α3, second reference line L2, second preset angles β, β1, β2, β3, reference angle γ, first preset plane Y1, first target angle w1, second preset plane Y2, second target angle w2;

[0061] Sectional viewing directions are e1-e1, e2-e2, and e3-e3. DETAILED DESCRIPTION

[0062] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0063] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0064] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0065] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0066] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0067] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, 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 embodiment.

[0068] Figure 1 Schematic diagram showing the bonding of a flat lens P and an optical film F0 in an embodiment of the related art; Figure 2 1. A schematic top view of a planar lens P carried on a carrying fixture 10 in an embodiment of the related art is shown; Figure 3 A schematic cross-sectional view of a supporting fixture 10 in an embodiment of the related art is shown; for ease of explanation, only the contents related to the embodiment of the related art are shown.

[0069] Please refer to Figure 1 and Figure 2 In one embodiment of the related art, in order to facilitate bonding, a flat lens P is usually placed on a supporting fixture 10, and then the optical film F0 is bonded to the flat lens P. In this process, the supporting surface 11 of the supporting fixture 10 is a flat surface. When the lens is a curved lens, such as Figure 3 As shown, the carrying surface 11 of the carrying fixture 10 is set to a curved surface that matches the curved lens.

[0070] However, after the curved lens and the optical film F0 are bonded together using the above bonding method, bubbles are likely to appear between the curved lens and the optical film F0, thereby affecting the optical performance.

[0071] Based on this, the embodiment of the present application improves the structure of the supporting fixture to improve the above-mentioned situation of bubbles. The following is an exemplary description of the supporting fixture provided in the embodiment of the present application in conjunction with relevant drawings and relevant embodiments.

[0072] It should be noted that Figure 4 For example, Figure 4 A schematic diagram illustrating the bonding of a curved lens G and an optical film F in one embodiment of the present application is shown. The supporting fixture 100 provided in this embodiment of the present application is used to bond the curved lens G and the optical film F. The optical module formed by bonding the curved lens G and the optical film F can be applied to fields such as mobile phones, bionic electronics, electronic skin, wearable devices, in-vehicle equipment, Internet of Things devices, and artificial intelligence devices. For example, the optical module can be used in mobile phones, tablets, PDAs, iPods, smart watches, laptops, televisions, monitors, virtual reality (VR) or augmented reality (AR) devices, and the like.

[0073] Figure 5 1 shows a schematic top view of the structure of a carrying fixture 100 in one embodiment of the present application; Figure 6 Shown Figure 5 The supporting fixture 100 is shown as a schematic cross-sectional structure diagram with reference plane E as the cross-sectional plane; for ease of explanation, only the content related to the embodiment of the present application is shown.

[0074] In some embodiments, please refer to Figure 5 and Figure 6 , and combined with reference Figure 4 The carrying fixture 100 includes a fixture body 110 , on which a carrying surface C, a first adjustment surface A1 and a second adjustment surface A2 are provided.

[0075] The supporting surface C is used to support the curved lens G. The side of the curved lens G facing away from the supporting surface C is used for bonding the optical film F. The structure of the supporting surface C is compatible with that of the curved lens G. The central axis L0 of the supporting surface C and the central axis of the curved lens G can coincide with each other. This facilitates more stable support of the curved lens G, thereby improving the stability of the bonding process. For example, if the outline of the curved lens G is circular or elliptical, the outline of the supporting surface C can also be a corresponding circular or elliptical shape. The outline of the supporting surface C can be set according to actual usage and is not specifically limited here.

[0076] The first adjustment surface A1 surrounds the edge of the support surface C and is connected to the support surface C. The second adjustment surface A2 surrounds the edge of the first adjustment surface A1 and is connected to the first adjustment surface A1. That is, the first adjustment surface A1 and the second adjustment surface A2 are both substantially annular. The first adjustment surface A1 and the second adjustment surface A2 are used to support the non-bonding portion of the optical film F. The first adjustment surface A1 has a first edge b1 connected to the support surface C, and a second edge b2 connected to the second adjustment surface A2. The second adjustment surface A2 has a third edge b3 connected to the first adjustment surface A1, and a fourth edge b4 arranged opposite the third edge b3.

[0077] It can be understood that the first edge b1 is also the edge of the bearing surface C. When the second adjustment surface A2 is directly connected to the first adjustment surface A1, the third edge b3 and the second edge b2 coincide with each other. When the second adjustment surface A2 is indirectly connected to the first adjustment surface A1, the third edge b3 and the second edge b2 are spaced apart from each other. Figure 5 and Figure 6 As an example, the situation where the third edge b3 and the second edge b2 are spaced apart from each other is illustrated.

[0078] Define the plane passing through the central axis L0 of the bearing surface C as the reference plane E. A line connecting the two more adjacent intersection points of the reference plane E with the first edge b1 and the second edge b2 is defined as the first reference line L1. The first reference line L1 is set at a first predetermined angle α with the central axis L0. A line connecting the two more adjacent intersection points of the reference plane E with the third edge b3 and the fourth edge b4 is defined as the second reference line L2. The second reference line L2 is set at a second predetermined angle β with the central axis L0. The first predetermined angle α is greater than the second predetermined angle β.

[0079] It should be noted that Figure 6 For example, the intersection points of the reference plane E with the first edge b1 are intersection point j1 and intersection point j2, the intersection points of the reference plane E with the second edge b2 are intersection point j3 and intersection point j4, the intersection points of the reference plane E with the third edge b3 are intersection point j5 and intersection point j6, and the intersection points of the reference plane E with the fourth edge b4 are intersection point j7 and intersection point j8. The two more adjacent intersection points of the reference plane E with the first edge b1 and the second edge b2 can be intersection point j1 and intersection point j3, or intersection point j2 and intersection point j4. The two more adjacent intersection points of the reference plane E with the third edge b3 and the fourth edge b4 can be intersection point j5 and intersection point j7, or intersection point j6 and intersection point j8. Figure 6 For example, the first reference line L1 is the line connecting the intersection j1 ​​and the intersection j3, and the second reference line L2 is the line connecting the intersection j6 and the intersection j8. The rest of the situations can be understood with reference to this and will not be described in detail.

[0080] Because optical films F of different structures have different material properties, and curved lenses G of different structures have different curvature variations, it is easy to cause improper force on the optical film F when bonding the optical film F to the curved lens G, which in turn causes large deformation differences in related areas of the optical film F, thereby generating bonding bubbles. In this embodiment of the present application, by providing a first adjustment surface A1 and a second adjustment surface A2, the tensile force on different areas of the optical film F can be adjusted during the bonding process of the optical film F and the curved lens G. The first adjustment surface A1 can be designed according to the properties of the optical film F, and the second adjustment surface A2 can be designed according to the curvature of the curved lens G.

[0081] Specifically, because the area of ​​the optical film F corresponding to the second adjustment surface A2 is located outside the area corresponding to the first adjustment surface A1, the curvature variation near the outside is greater and the force environment it faces is more complex. Therefore, the area of ​​the optical film F corresponding to the second adjustment surface A2 requires a greater degree of adjustment in tensile force than the area of ​​the optical film F corresponding to the first adjustment surface A1. Therefore, by setting the first preset angle α corresponding to the first adjustment surface A1 to be greater than the second preset angle β corresponding to the second adjustment surface A2, the degree of adjustment in tensile force applied by the second adjustment surface A2 to the area corresponding to the optical film F is greater than that applied by the first adjustment surface A1, thereby enabling separate adjustment of different areas of the optical film F. Thus, through the adjustment effects of both the first adjustment surface A1 and the second adjustment surface A2, the occurrence of bubbles in the optical module is alleviated, improving optical performance.

[0082] In addition, by setting the first adjustment surface A1, a transition can be made to the adjustment process of the second adjustment surface A2, which is more conducive to the second adjustment surface A2 adjusting the tensile force of the edge area of ​​the optical film F and improving the reliability of the bonding process.

[0083] In some embodiments, please refer to Figure 5 and Figure 6 The reference surface E intersects the bearing surface C at a reference line J. A line passing through any of the intersection points of the reference line J and the first edge b1 and tangent to the reference line J is a reference tangent line T. The reference tangent line T is set at a reference angle γ with the central axis L0. Figure 6 For example, the reference tangent line T is shown as a tangent line passing through the intersection point j1. The first preset angle α is greater than the reference angle γ and less than 90 degrees. This facilitates the lamination of the optical film F to the curved lens G and facilitates the lamination process.

[0084] It is understood that since the second preset angle β is smaller than the first preset angle α, when the first preset angle α is less than 90 degrees, the second preset angle β is also less than 90 degrees. This not only helps to further reduce the risk of the optical film F breaking due to excessive stretching, allowing the second adjustment surface A2 to achieve a better adjustment effect, but also facilitates the coordination of the first adjustment surface A1 and the second adjustment surface A2 for adjustment.

[0085] In some embodiments, please refer to Figure 5 and Figure 6 The optical film F is configured as an isotropic optical film F. All planes passing through the central axis L0 of the support surface C constitute a plane set. When any plane in the plane set serves as the reference plane E, the plane corresponds to a first preset angle α, and each first preset angle α is equal to each other. In other words, the inclination of each area of ​​the first adjustment surface A1 is consistent. In this way, when the optical film F is an isotropic optical film F, the first adjustment surface A1 with a uniform inclination can better combine the characteristics of the optical film F to achieve the corresponding tensile stress adjustment.

[0086] Figure 7 1 shows a schematic top view of the structure of an optical film F in one embodiment of the present application; Figure 8 1 shows a schematic cross-sectional structure diagram of the carrying fixture 100 in one embodiment of the present application, with the first preset plane Y1 as the cross-sectional plane; Figure 9 A schematic cross-sectional structure diagram of the carrying fixture 100 with the second preset plane Y2 as the cross-sectional plane in one embodiment of the present application is shown; for ease of explanation, only the content related to the embodiment of the present application is shown.

[0087] In some embodiments, please refer to Figure 7 The optical film F is configured as an anisotropic optical film F, and the optical film F has a first optical axis z1 and a second optical axis z2 that are perpendicular to each other. Figure 8 , and combined with reference Figure 5 The plane passing through the central axis L0 of the bearing surface C and the first optical axis z1 is the first preset surface Y1. When the first preset surface Y1 is used as the reference surface E, the first preset angle α corresponding to the first preset surface Y1 is the first target angle w1. Figure 9 , and combined with reference Figure 5 The plane passing through the central axis L0 of the bearing surface C and the second optical axis z2 is the second preset surface Y2. When the second preset surface Y2 serves as the reference surface E, the first preset angle α corresponding to the second preset surface Y2 is the second target angle w2. The first target angle w1 is not equal to the second target angle w2.

[0088] Since the optical film F has a first optical axis z1 and a second optical axis z2, the mechanical properties of the optical film F on the first optical axis z1 and the second optical axis z2 are different, that is, the tensile coefficients of the optical film F on the first optical axis z1 and the second optical axis z2 are different. Therefore, by setting the position corresponding to the first optical axis z1 and the position corresponding to the second optical axis z2 on the first adjustment surface A1 to have different degrees of inclination, the bonding process of the non-isotropic optical film F can be better adjusted.

[0089] Since the tensile stress corresponding to the optical axis with strong tensile ability needs to be adjusted less, the tensile stress corresponding to the optical axis with weak tensile ability needs to be adjusted more. Based on this, the inventors of this application try to adjust the degree of stretching on different optical axes by combining the first target angle w1 and the second target angle w2. Specifically, in some embodiments, please continue to refer to Figures 7 to 9 , the dimension h1 of the optical film F along the first optical axis z1 is greater than the dimension h2 of the optical film F along the second optical axis z2. The tensile coefficient of the optical film F along the first optical axis z1 is defined as δ1, and the tensile coefficient of the optical film F along the second optical axis z2 is defined as δ2. When the optical film F is bonded to the curved lens G, the tensile stress of the optical film F along the first optical axis z1 is T1, and the tensile stress of the optical film F along the second optical axis z2 is T2. The first target angle w1 and the second target angle w2 meet the following conditions:

[0090] It can be understood that when the force-bearing areas of the first optical axis z1 and the second optical axis z2 are equal, the ratio of the tensile deformation of the first optical axis z1 and the second optical axis z2 is Under the above conditions, the ratio is limited to the range of (0, 1). This means that the degree of tensile stress adjustment required is characterized by the interaction between the three parameters: stretch coefficient δ1, stretch coefficient δ2, tensile stress T1, tensile stress T2, first target angle w1, and second target angle w2. Within the range of (0, 1), the tensile stress on the optical film F along different optical axes can be more consistent.

[0091] In this way, in combination with the different stretching capabilities required for different areas of the optical film F, the tensile stress of each area of ​​the optical film F can be improved by coordinating the various parameters illustrated in the above embodiments, which can further improve the occurrence of lamination bubbles.

[0092] Figure 10 A structural schematic diagram is shown in which the reference line J is an arc in an embodiment of the present application; for ease of explanation, only the content related to the embodiment of the present application is shown.

[0093] In some embodiments, please refer to Figure 4 and Figure 10, and combined with reference Figure 5 and Figure 6 When the curved lens G is configured as a spherical lens, since the supporting surface C is constructed based on the shape of the curved lens G, when the reference surface E is used as a cross-section, the reference surface E and the supporting surface C intersect at a reference line J. The reference line J is an arc, that is, the reference line J is a segment of an arc. The reference line J has an arc center (i.e., arc center O0), and the arc radius at each point on the reference line J is the arc radius R0. It can be understood that the arc radius R0 can be equal to the radius of the sphere on which the curved lens G is located.

[0094] Specifically, all planes passing through the central axis L0 of the bearing surface C constitute a plane set. When any plane in the plane set is used as the reference plane E, the any plane corresponds to a second preset angle β, and each second preset angle β is equal to each other.

[0095] In this way, since the curvatures of the edge areas of the spherical lens can be roughly regarded as consistent, when constructing the second adjustment surface A2, the above-mentioned second preset angles β can be made the same, that is, the inclination degrees of each part of the second adjustment surface A2 are consistent, thereby adjusting the tensile force of the optical film F in accordance with the curvature of the curved lens G.

[0096] In some embodiments, please refer to Figure 10 , and combined with reference Figure 6 , combined with the corresponding parameters on the reference line J, the second preset angle β is arctan R0. This is beneficial to improving the adjustment effect of the second adjustment surface A2.

[0097] Figure 11 A schematic diagram of a structure in which the baseline J is a plurality of arc segments in an embodiment of the present application is shown; for ease of explanation, only the content related to the embodiment of the present application is shown.

[0098] In some embodiments, the curved lens G is configured as an aspherical lens. The reference line J is composed of multiple arcs. Figure 11 For example, the baseline J has two arc centers (i.e., arc center O1 and arc center O2). The baseline J is formed by connecting the first segment J1, the second segment J2, the third segment J3, the fourth segment J4, and the fifth segment J5 in sequence. The segments can be connected by arc transitions. The arc center of the first segment J1 and the fifth segment J5 is the arc center O2, and the arc radius is the arc radius R. c The arc center of the second segment J2 and the fourth segment J4 is the arc center O1, and the arc radius is the arc radius R b The arc center of the third segment J3 is the arc center O1, and the arc radius is the arc radius R a Of course, it can also be other forms of arc segments, which can be adjusted according to specific usage conditions and are not specifically limited here.

[0099] Specifically, all planes passing through the central axis L0 of the bearing surface C constitute a plane set. When any plane in the plane set is used as the reference plane E, any plane corresponds to a second preset angle β, and each second preset angle β is unequal to each other.

[0100] Figure 12 Shown Figure 5 The cross-sectional structure diagram of the supporting fixture 100 along the cross-sectional direction e1-e1 is shown; Figure 13 Shown Figure 5 The cross-sectional structure diagram of the supporting fixture 100 along the cross-sectional direction e2-e2 is shown; Figure 14 Shown Figure 5 A schematic cross-sectional view of the support fixture 100 along the cross-sectional direction e3-e3 is shown. For ease of illustration, only the details relevant to the present embodiment are shown. The cross-sectional direction e1-e1 is 45 degrees to the cross-sectional direction e2-e2, the cross-sectional direction e2-e2 is 45 degrees to the cross-sectional direction e3-e3, and the cross-sectional direction e1-e1 is 90 degrees to the cross-sectional direction e3-e3.

[0101] For details about some embodiments, please refer to Figures 12 to 14 , and combined with reference Figure 5 , the second preset angle β1, the second preset angle β2, and the second preset angle β3 are not equal to each other. In addition, in combination with the contents illustrated in some of the aforementioned embodiments, when the optical film F is an isotropic optical film F, the first preset angle α1, the first preset angle α2, and the first preset angle α3 are equal to each other. When the optical film F is an anisotropic optical film F, the first preset angle α1, the first preset angle α2, and the first preset angle α3 are not equal to each other.

[0102] In this way, since the curvatures of the edge areas of the aspherical lens are variable, when constructing the second adjustment surface A2, the second preset angle β can be set according to different areas, that is, the inclination degrees of each part of the second adjustment surface A2 are inconsistent, thereby adjusting the tensile force of the optical film F in accordance with the curvature of the curved lens G.

[0103] In some embodiments, please refer to Figure 11 , combined with the corresponding parameters on the reference line J, the radius of the arc where any intersection point (i.e., the intersection point j1 and the intersection point j2 shown in some of the above embodiments) of the reference line J and the first edge b1 is located is R c The second preset angle β corresponding to the second reference line L2 adjacent to any intersection point is arctan R c This is beneficial to improving the adjustment effect of the second adjustment surface A2.

[0104] In some embodiments, please refer to Figure 5 and Figure 6 , the reference surface E intersects the first adjustment surface A1 at the first preset line q1 and the second preset line q2, and the first preset line q1 and the second preset line q2 are both straight lines. Figure 6 For example, the first preset line q1 is extended in a straight line between the intersection j1 ​​and the intersection j3, and the second preset line q2 is extended in a straight line between the intersection j2 and the intersection j4.

[0105] In this way, by setting the first preset line q1 and the second preset line q2 as straight line structures, the degree of change of the first adjustment surface A1 in the extension direction of the central axis L0 is more balanced, which is more conducive to adjusting the tensile stress of the optical film F.

[0106] In some embodiments, please refer to Figure 5 and Figure 6 , the reference surface E intersects the second adjustment surface A2 at the third preset line q3 and the fourth preset line q4, and the third preset line q3 and the fourth preset line q4 are both straight lines. Figure 6 For example, the third preset line q3 is extended in a straight line between the intersection j5 and the intersection j7, and the fourth preset line q4 is extended in a straight line between the intersection j6 and the intersection j8.

[0107] In this way, by setting the third preset line q3 and the fourth preset line q4 to a straight line structure, the degree of change of the second adjustment surface A2 in the extension direction of the central axis L0 is more balanced, which is more conducive to coordinating with the curvature change of the curved lens G to adjust the tensile stress of the optical film F.

[0108] In some embodiments, please refer to Figure 5 and Figure 6 The fixture body 110 is further provided with a transition surface D, which is connected between the first adjustment surface A1 and the second adjustment surface A2. That is, the two edges of the transition surface D are the second edge b2 and the third edge b3.

[0109] In this way, by setting the transition surface D, a transition area can be formed between the first adjustment surface A1 and the second adjustment surface A2, which can further reduce the risk of the optical film F breaking due to excessive difference in tensile stress at different locations in the edge area of ​​the optical film F, thereby improving the bonding effect.

[0110] In some embodiments, please refer to Figure 5 and Figure 6 , the reference surface E and the transition surface D intersect at the fifth preset line q5 and the sixth preset line q6, and the fifth preset line q5 and the sixth preset line q6 are both straight lines. Figure 6 For example, the fifth preset line q5 is extended in a straight line between the intersection j3 and the intersection j5, and the sixth preset line q6 is extended in a straight line between the intersection j4 and the intersection j6.

[0111] In this way, by setting the fifth preset line q5 and the sixth preset line q6 as straight line structures, it is more conducive to improving the transition effect of the transition surface D, and thus more conducive to the adjustment coordination between the first adjustment surface A1 and the second adjustment surface A2.

[0112] In some embodiments, please refer to Figure 5 and Figure 6 The fifth preset line q5 and the sixth preset line q6 are both perpendicular to the central axis L0. That is, the fifth preset line q5 and the sixth preset line q6 are not tilted. This further reduces the risk of the optical film F breaking during the lamination process.

[0113] Based on the same inventive concept, embodiments of the present application provide a bonding device, including the supporting fixture 100 described in any of the above embodiments. The supporting surface C of the supporting fixture 100 is used to support the curved lens G. A pressing member may be provided in the bonding device to support the optical film F and facilitate bonding between the optical film F and the curved lens G.

[0114] The advantages possessed by the supporting fixture 100 in any of the above embodiments are also possessed by the laminating device, which will not be described in detail here.

[0115] In summary, through the various implementations illustrated in the aforementioned embodiments, the design of the first adjustment surface A1, the second adjustment surface A2, and the transition surface D can meet the tensile strain requirements in different directions for optical films F with different material properties and curved lenses G with different curvatures. With the first adjustment surface A1 and the transition surface D, the film to be bonded is subjected to appropriate stress, thereby generating the desired tensile deformation. For the first adjustment surface A1 and / or the second adjustment surface A2 and / or the transition surface D, the corresponding tensile parameters can be determined by analyzing the retraction of the optical film due to environmental factors during reliability testing, thereby further designing the first adjustment surface A1 and / or the second adjustment surface A2 and / or the transition surface D. The first adjustment surface A1, the second adjustment surface A2, and the transition surface D can work together to adjust and limit the relevant tensile stress. The coordinated coordination of the relevant parameters of the first adjustment surface A1, the second adjustment surface A2, and the transition surface D not only facilitates the adjustment of tensile stress, but also reduces the risk of cracking of the optical film F, thereby improving the bonding effect. This improves the occurrence of bubbles in the optical module and enhances optical performance. Compared with the relatively flat supporting fixture 100 in the related art, it is more adaptable to the stretching and adjustment requirements of lenses with different curvatures and optical film materials with different properties.

[0116] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0117] The above-described embodiments merely represent several implementation methods of the present application. 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 a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A supporting fixture for laminating curved lenses and optical films, characterized in that: The carrying fixture includes: A fixture body, the fixture body being provided with a bearing surface, a first adjustment surface surrounding an edge of the bearing surface and connected to the bearing surface, and a second adjustment surface surrounding an edge of the first adjustment surface and connected to the first adjustment surface; The carrying surface is used to carry a curved lens, the side of the curved lens facing away from the carrying surface is used to bond the optical film, and the first adjustment surface and the second adjustment surface are used to carry a non-bonding portion of the optical film; the first adjustment surface has a first edge connected to the carrying surface, and a second edge connected to the second adjustment surface; the second adjustment surface has a third edge connected to the first adjustment surface, and a fourth edge arranged opposite to the third edge; A plane passing through the central axis of the bearing surface is defined as a reference surface; a line connecting two more adjacent intersection points where the reference surface intersects the first edge and the second edge is defined as a first reference line, and the first reference line is set at a first preset angle to the central axis; a line connecting two more adjacent intersection points where the reference surface intersects the third edge and the fourth edge is defined as a second reference line, and the second reference line is set at a second preset angle to the central axis; the reference surface intersects the bearing surface at a reference line, and a line passing through any intersection point where the reference line intersects the first edge and is tangent to the reference line is defined as a reference tangent, and the reference tangent is set at a reference angle to the central axis; The first preset angle is greater than the second preset angle; the first preset angle is greater than the reference angle and less than 90 degrees; the intersection of the extension line of the first reference line and the central axis, and the intersection of the extension line of the second reference line and the central axis are both located on the side of the reference line facing the fixture body.

2. The carrying fixture according to claim 1, characterized in that: The optical film is configured as an isotropic optical film; All planes passing through the central axis of the bearing surface constitute a plane set; when any plane in the plane set is used as the reference plane, the any plane corresponds to a first preset angle, and each first preset angle is equal to each other.

3. The carrying fixture according to claim 1, characterized in that: The optical film is configured as an anisotropic optical film, and the optical film has a first optical axis and a second optical axis that are perpendicular to each other; A plane passing through the central axis of the bearing surface and the first optical axis is a first preset surface; when the first preset surface is used as the reference surface, the first preset angle corresponding to the first preset surface is a first target angle; A plane passing through the central axis of the bearing surface and the second optical axis is a second preset plane; When the second preset surface is used as the reference surface, the first preset angle corresponding to the second preset surface is a second target angle; The first target angle is not equal to the second target angle.

4. The carrying fixture according to claim 3, characterized in that: The dimension of the optical film along the extending direction of the first optical axis is greater than the dimension of the optical film along the extending direction of the second optical axis; The tensile coefficient of the optical film on the first optical axis is defined as δ1, and the tensile coefficient of the optical film on the second optical axis is defined as δ2; when the optical film is bonded to the curved lens, the tensile stress of the optical film on the first optical axis is defined as T1, and the tensile stress of the optical film on the second optical axis is defined as T2; The first target angle w1 and the second target angle w2 satisfy the following conditions:

5. The carrying fixture according to claim 1, characterized in that: The curved lens is configured as a spherical lens; All planes passing through the central axis of the bearing surface constitute a plane set; when any plane in the plane set is used as the reference plane, the any plane corresponds to a second preset angle, and each second preset angle is equal to each other.

6. The carrying fixture according to claim 5, characterized in that: The reference surface and the bearing surface intersect at a reference line, and the reference line is an arc; The arc radius of the reference line is R0, and the second preset angle is arctanR0.

7. The carrying fixture according to claim 1, characterized in that: The curved lens is configured as an aspherical lens; All planes passing through the central axis of the bearing surface constitute a plane set; when any plane in the plane set is used as the reference plane, any plane corresponds to a second preset angle, and each second preset angle is not equal to each other.

8. The carrying fixture according to claim 7, characterized in that: The reference surface and the bearing surface intersect at a reference line, and the reference line is composed of multiple arc segments; The radius of the arc at any intersection point where the reference line intersects the first edge is R c ; The second preset angle corresponding to the second reference line adjacent to any intersection point is arctanR c .

9. The carrying fixture according to any one of claims 1 to 8, characterized in that: The reference surface intersects the first adjustment surface at a first preset line and a second preset line, and the first preset line and the second preset line are both straight lines.

10. The carrying fixture according to any one of claims 1 to 8, characterized in that: The reference surface intersects the second adjustment surface at a third preset line and a fourth preset line, and the third preset line and the fourth preset line are both straight lines.

11. The carrying fixture according to any one of claims 1 to 8, characterized in that: The fixture body is also provided with a transition surface; The transition surface is connected between the first adjustment surface and the second adjustment surface.

12. The carrying fixture according to claim 11, characterized in that: The reference surface intersects the transition surface at a fifth preset line and a sixth preset line, and both the fifth preset line and the sixth preset line are straight lines.

13. The carrying fixture according to claim 12, characterized in that: The fifth preset line and the sixth preset line are both perpendicular to the central axis.

14. A laminating device, characterized in that: It comprises the carrying jig as described in any one of claims 1-13.

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