Alignment method for display panel and its substrate, and electronic device

Abstract

Embodiments of the present application provide a method for aligning a display panel and a substrate thereof, and an electronic device. The display panel includes a first substrate and a second substrate. A positioning hole is provided on the first substrate, and a first actuator film is provided on the second substrate. A microporous array structure is provided on the surface of the first actuator film, which can periodically modulate natural light to show structural color. The first actuator film is a shape memory material and can generate a predetermined deformation under the action of a predetermined driving process. The positioning hole restricts the deformation generated by the first actuator film. During the alignment process, the positioning hole and the first actuator film are in opposite positions. By collecting the actual structural color and comparing it with the chromaticity of the structural color generated under the predetermined deformation, it is judged whether the actual deformation is restricted by the positioning hole, and the alignment situation of the first substrate and the second substrate is determined. Judging the alignment accuracy through structural color is faster and more intuitive, and its accuracy can reach the order of dozens of nanometers.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a method for aligning a display panel and its base substrate, and an electronic device. Background Art

[0002] As the integration of electronic products increases, the space inside the products becomes increasingly tight, which puts forward the demand for internal components to be light, thin, and even flexible enough to fit in narrow and twisted spaces. When aligning the layers of multi-layer flexible electronic devices, the position between the upper and lower layers is sometimes not accurate, resulting in reduced performance, short circuits, or circuits not printed on the surface of the printed circuit board as required, resulting in scrapped boards.

[0003] The alignment of multi-layer flexible electronic device layers in related technologies requires professional equipment, which not only increases the production cost of electronic products, but also makes the alignment process more complicated. Therefore, how to ensure the alignment accuracy while simplifying the alignment process is an urgent problem to be solved. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a display panel and its substrate alignment method and electronic device, which can simplify the alignment process while ensuring the alignment accuracy of the multi-layer flexible electronic device layer. The specific technical solution is as follows:

[0005] A first aspect of the present application provides a display panel, comprising at least a first substrate and a second substrate, wherein the first substrate is provided with at least one positioning hole, and the second substrate is provided with first actuator films opposite to the positioning holes and equal in number on a surface facing the first substrate;

[0006] A micropore array structure is provided on the surface of the first actuator film facing the first substrate, and the micropore array structure can periodically modulate the natural light passing through the positioning holes and irradiating the surface of the micropore array structure, and display structural color;

[0007] The first actuator film is a shape memory material, and the first actuator film can produce a predetermined deformation under the action of a predetermined driving process; the positioning hole is used to limit the deformation of the first actuator film under the predetermined driving process;

[0008] The structural color displayed by the first actuator film can pass through the positioning hole, and is used to realize the alignment of the first substrate and the second substrate based on the collected structural color displayed after the deformation of the first actuator film during the display panel manufacturing process.

[0009] The display panel provided in the embodiment of the present application uses the positioning hole and the first actuator film as positioning points, and the positioning hole and the first actuator film are relatively aligned. A microhole array structure is set on the first actuator film, and natural light is irradiated on the microhole array structure to cause diffraction and interference to show structural color. The first actuator film adopts shape memory material, which is deformed under the action of the driving process. The degree of alignment accuracy is judged by limiting the deformation degree of the first actuator film through the positioning hole. The degree of deformation is manifested as the difference in structural color. The difference in structural color is at the level of tens of nanometers, which effectively improves the alignment accuracy. The degree of alignment accuracy is expressed by structural color, which is faster and more intuitive. The alignment accuracy can be judged only by the chromaticity of the structural color, thereby avoiding the use of professional equipment and complex processes, and the alignment process is simple and easy.

[0010] In some embodiments of the present application, an orthographic projection of the positioning hole on the first actuator film falls within the range of the first actuator film.

[0011] In some embodiments of the present application, the first actuator film is one of a thermal shape memory material, a light shape memory material, a pH shape memory material, an electrical shape memory material or a magnetic shape memory material, and produces a predetermined deformation under the driving processes of heating, illumination, pH value adjustment, application of an electric field or application of a magnetic field.

[0012] In some embodiments of the present application, the diameter of the micropores in the micropore array structure is 0.5 μm-2 μm, and the spacing between the micropores is 0.5 μm-2 μm.

[0013] In some embodiments of the present application, the first actuator film includes a single-layer or double-layer organic film.

[0014] In some embodiments of the present application, the first actuator film further includes an inorganic film disposed on the surface of the single-layer organic film or the double-layer organic film; or the first actuator film further includes an inorganic film disposed between the double-layer organic film.

[0015] In some embodiments of the present application, the positioning hole is a circular hole, a square hole, or a closed polygonal hole.

[0016] In some embodiments of the present application, the diameter of the equivalent circle of the positioning hole is 10 μm-400 μm.

[0017] In some embodiments of the present application, a second actuator film is further provided on the surface of the second substrate facing the first substrate, and the second actuator film is provided at the edge of the second substrate; the structural color actually displayed by the first actuator film through the positioning hole is used for comparison with the structural color displayed by the second actuator film, so as to align the first substrate and the second substrate.

[0018] In a second aspect, the present application proposes an electronic device, comprising the display panel in any embodiment of the first aspect.

[0019] In a third aspect, the present application provides a substrate alignment method, which is used to align the first substrate and the second substrate in the display panel described in any embodiment of the first aspect;

[0020] Providing the first substrate and the second substrate, wherein the first substrate is provided with the positioning hole, and the surface of the second substrate facing the first substrate is provided with the first actuator film correspondingly, and a micropore array structure is formed on the surface of the first actuator film;

[0021] acquiring a predetermined structural color displayed by the first actuator film under the predetermined deformation condition;

[0022] Position the positioning hole and the first actuator film opposite to each other;

[0023] Provide natural light, and obliquely irradiate the natural light through the positioning hole at a first angle to the microhole array structure, so that the microhole array can periodically modulate the natural light and display structural color;

[0024] The first actuator film is driven to deform by using the same driving process as the predetermined deformation, the positioning hole limits the deformation of the first actuator film, and the actual structural color corresponding to the deformation is collected through the positioning hole;

[0025] The first substrate and the second substrate are aligned based on the collected structural color displayed after the first actuator film generates a predetermined deformation and the actually displayed structural color collected through the positioning hole.

[0026] In some embodiments of the present application, during the alignment process of the base substrate, the structural color displayed by the first actuator film is collected by a CCD camera, and when the actual displayed structural color photographed by the CCD camera through the positioning hole is consistent with the predetermined structural color corresponding to the first actuator film under the predetermined deformation condition, the alignment of the first base substrate and the second base substrate is completed;

[0027] The CCD camera and the normal direction of the positioning hole form a preset angle, and the preset angle is 0° to 90°.

[0028] In some embodiments of the present application, a second actuator film is further provided on the surface of the second substrate facing the first substrate, and the second actuator film is provided at the edge of the second substrate;

[0029] The first substrate and the second substrate are aligned based on the predetermined structural color displayed by the second actuator film under the predetermined deformation condition and the structural color actually displayed by the first actuator film collected through the positioning hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other embodiments can also be obtained based on these drawings.

[0031] Figure 1 A schematic diagram of the structure of a display panel according to an embodiment of the present application;

[0032] Figure 2 for Figure 1 A-A' cross section;

[0033] Figure 3 A top view of a first actuator film according to an embodiment of the present application;

[0034] Figure 4 This is a front view of the first actuator film of an embodiment of the present application;

[0035] Figure 5 This is a schematic diagram of the first substrate and the first actuator film structure of an embodiment of the present application;

[0036] Figure 6 This is a schematic diagram of the structure of a display panel according to another embodiment of the present application;

[0037] Figure 7 This is a schematic diagram of the first substrate and the first actuator film structure according to another embodiment of the present application.

[0038] The reference numerals are as follows:

[0039] 100 - first base substrate; 110 - positioning hole; 200 - second base substrate; 210 - first actuator film; 211 - microhole array structure; 300 - CCD camera; 400 - second actuator film; α - preset angle. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field based on the present application belong to the scope of protection of the present application.

[0041] like Figures 1 to 3 As shown, the first aspect of the present application proposes a display panel, which includes at least a first substrate 100 and a second substrate 200. The first substrate 100 is provided with at least one positioning hole 110, and the surface of the second substrate 200 facing the first substrate 100 is provided with first actuator films 210 that are opposite to the positioning holes 110 and equal in number. The surface of the first actuator film 210 facing the first substrate 100 is provided with a micropore array structure 211, which can periodically modulate the natural light that passes through the positioning holes 110 and irradiates the surface of the micropore array structure 211, and show structural colors. The first actuator film 210 is a shape memory material, and the first actuator film 210 can produce a predetermined deformation under the action of a predetermined driving process; the positioning holes 110 are used to limit the deformation of the first actuator film 210 under the predetermined driving process. The structural color displayed by the first actuator film 210 can pass through the positioning hole 110, and is used to realize the alignment of the first base substrate 100 and the second base substrate 200 based on the collected structural color displayed after the deformation of the first actuator film 210 during the display panel manufacturing process.

[0042] In the display panel proposed in the embodiment of the present application, at least one positioning hole 110 is provided on the first base substrate 100, and correspondingly, the second base substrate 200 is provided with first actuator films 210 which are opposite to the positioning holes 110 and equal in number on the surface facing the first base substrate 100. When the first base substrate 100 and the second base substrate 200 are aligned, the positioning holes 110 and the first actuator films 210 are used as positioning points, and the positioning holes 110 and the first actuator films 210 are aligned relative to each other. A micro-hole array structure 211 is provided on the first actuator film 210, and natural light is irradiated on the micro-hole array structure 211 to cause diffraction and interference, thereby showing structural color.

[0043] The first actuator film 210 uses a shape memory material and generates a predetermined deformation under the action of a predetermined driving process; specifically, the first actuator film 210 generates a bending deformation. During the bending process, the spacing between the micropores of the micropore array structure 211 increases, causing the structural color to change. Referring to the blazed grating equation mλ=d(sin i–sinθ)(i and θ are the incident angle and diffraction angle respectively, d is the grating constant, m is the spectral order, and λ is the wavelength of the incident light), the chromatic dispersion of the structural color is dl / dλ=fm / (dcosθ)(f is the focal length of the focusing lens, m is the diffraction order, d is the grating constant, and λ is the wavelength of the incident light), and the dispersion is the spectroscopic effect. It can be understood that the same driving process corresponds to the same deformation amount and produces the same structural color.

[0044] During alignment, the positioning hole 110 of the first base substrate 100 and the first actuator film 210 of the second base substrate 200 are aligned relative to each other. The positioning hole 110 limits the deformation of the first actuator film 210 under the predetermined driving process. When there is a deviation in alignment, the first actuator film 210 will collide with the edge of the positioning hole 110 during the deformation process. At this time, the deformation of the first actuator film 210 under the predetermined driving process is limited by the positioning hole 110 and cannot reach the predetermined deformation. The structural color actually displayed by the first actuator film 210 is different from the chromaticity of the structural color generated by the same driving process. The positions of the first base substrate 100 and the second base substrate 200 are adjusted. When the chromaticity of the structural color actually displayed through the positioning hole 110 is consistent with the chromaticity of the structural color generated by the same driving process, the first actuator film 210 is not limited by the edge of the positioning hole 110, and the actual deformation is the same as the deformation under the same driving process, and the same structural color is generated, indicating that the alignment is accurate.

[0045] The alignment accuracy is indicated by structural color, which is faster and more intuitive. The alignment accuracy can be judged only by the chromaticity of the structural color, avoiding the use of professional equipment and complex processes. The red wavelength range that can be distinguished by the naked eye is 610nm~640nm, the yellow wavelength is 580nm~595nm, and the blue wavelength is 455nm~490nm. It can be seen that the wavelength difference of tens of nanometers can be directly observed by the naked eye. The CCD (charge coupled device) camera 300 can collect different chromaticities and distinguish them more accurately. Its accuracy reaches tens of nanometers, which effectively improves the alignment accuracy of the multi-layer flexible electronic device layer, and the alignment process is simple and easy. For example, the first actuator film 210 is deformed under the driving process, and the structural color is collected by the CCD camera 300, and the structural color collected is red light with a wavelength of 620nm. After the first substrate 100 and the second substrate 200 are aligned, under the same driving process, if the CCD camera 300 collects yellow light with a wavelength of 590nm, it means that the first substrate 100 and the second substrate 200 are not aligned accurately. Therefore, it is necessary to slightly adjust the position of the second substrate 200 so that the first actuator film 210 is deformed to a greater extent, the wavelength of the structural color collected by the CCD camera becomes larger, and the color collected by the CCD camera 300 is red-shifted, that is, red light with a wavelength of 620nm is collected, which means that the first substrate 100 and the second substrate 200 are accurately aligned.

[0046] In some embodiments, Figure 3 As shown, the orthographic projection of the positioning hole 110 on the first actuator film 210 falls within the range of the first actuator film 210 .

[0047] In this embodiment, the size of the positioning hole 110 is smaller than that of the first actuator film 210 . During alignment, the range of the first actuator film 210 can completely cover the range of the positioning hole 110 . In this way, the positioning hole 110 can limit the deformation of the first actuator film 210 .

[0048] In some embodiments, the first actuator film 210 is one of a thermal shape memory material, a light shape memory material, a pH shape memory material, an electric shape memory material, or a magnetic shape memory material, and produces a predetermined deformation under the driving processes of heating, illumination, pH value adjustment, application of an electric field, or application of a magnetic field.

[0049] In this embodiment, the first actuator film 210 can be made of a thermo-induced shape memory material, such as polyethylene-vinyl acetate, and the corresponding driving process is heating. The first actuator film 210 can be deformed by heating the first actuator film 210, and after the heating is stopped, the first actuator film 210 gradually returns to its original state.

[0050] The first actuator film 210 may be made of a photo-induced shape memory material, and the corresponding driving process is illumination. The first actuator film 210 may be deformed by illuminating the first actuator film 210, and after the illumination stops, the first actuator film 210 gradually returns to its original state.

[0051] The first actuator film 210 may be made of a pH-induced shape memory material, and the corresponding driving process is to adjust the environmental pH value. By adjusting the environmental pH value of the first actuator film 210, the first actuator film 210 can be deformed or restored to its original state.

[0052] The first actuator film 210 may be made of an electro-shaped memory material, and the corresponding driving process is to apply an electric field. By applying an electric field to the first actuator film 210, the first actuator film 210 may be deformed, and after the electric field is released, the first actuator film 210 gradually returns to its original state.

[0053] The first actuator film 210 may be made of a magneto-shape memory material, and the corresponding driving process is to apply a magnetic field. By applying a magnetic field to the first actuator film 210, the first actuator film 210 may be deformed, and after the magnetic field is released, the first actuator film 210 gradually returns to its original state.

[0054] The first actuator film 210 in this embodiment can adjust its corresponding driving process to adjust the deformation of the first actuator film 210, so as to achieve adjustable deformation and displayed structural color.

[0055] In some embodiments, Figure 3 As shown, the diameter of the micropores in the micropore array structure 211 is 0.5μm-2μm, for example, the diameter of the micropores is 0.5μm, 1μm, 1.5μm, 2μm, etc., and the spacing between the micropores is 0.5μm-2μm, for example, the spacing between the micropores is 0.5μm, 1μm, 1.5μm, 2μm, etc.

[0056] In this embodiment, when the light irradiated on the first actuator film 210 is natural light, the diameter of the micropores in the micropore array structure is 0.5 μm-2 μm. The first actuator film 210 is prepared into a micropore array structure 211 by a patterning process such as photolithography, and the diameter of the micropores and the spacing between the micropores can be equal or unequal. The diameter of the micropores is preferably 1 μm, and the spacing between the micropores is preferably 1 μm.

[0057] When the diameter of the micropores is less than 0.5 μm, and the spacing between the micropores is less than 0.5 μm, it is more difficult to manufacture the first actuator film 210. When the diameter of the micropores is greater than 2 μm, the interference or diffraction effect of the light irradiated on the micropores is not good, which affects the effect of the structural color display of the first actuator film 210. And when the spacing between the micropores is greater than 2 μm, the intensity of the light that can be reflected or diffracted by the first actuator film 210 is not enough, which affects the chromaticity value of the collected structural color.

[0058] In some embodiments, the first actuator film 210 includes a single-layer or double-layer organic film.

[0059] In this embodiment, the organic film is usually used as an insulating layer, serving as an insulating medium between charge storage and conductive metal lines, and its thickness is usually less than 1 μm. Therefore, the presence of the first actuator film 210 will not have much impact on the thickness of the display panel.

[0060] like Figure 4 As shown, when the first actuator film 210 is a double-layer organic film, its micropore array structure 211 is arranged on a layer close to the first base substrate 100 .

[0061] In some embodiments, the first actuator film 210 further includes an inorganic film disposed on the surface of the single-layer organic film or the double-layer organic film; or the first actuator film 210 further includes an inorganic film disposed between the double-layer organic film.

[0062] In this embodiment, an inorganic film is compounded on the surface of a single-layer organic film or a double-layer organic film, or an inorganic film is compounded between double-layer organic films, which can improve the mechanical strength, thermal stability and corrosion resistance of the first actuator film 210 .

[0063] In some embodiments, Figure 1 , Figure 3 , Figure 6 As shown, the positioning hole 110 is a circular hole, a square hole or a closed polygonal hole.

[0064] In this embodiment, the closed polygonal hole may be a triangle, rhombus, pentagon or hexagon hole, etc., and may be prepared by laser drilling, punching or CNC drilling with an accuracy of tens of microns.

[0065] In some embodiments, Figure 1 , Figure 2 , Figure 3As shown, the diameter of the positioning hole 110 or the diameter of the equivalent circle of the positioning hole is 10μm-400μm, for example, the diameter of the positioning hole or the diameter of the equivalent circle is 10μm, 15μm, 50μm, 100μm, 300μm, 400μm, etc., where the diameter of the equivalent circle refers to the diameter of the inscribed circle of the closed polygon.

[0066] In this embodiment, when the diameter of the positioning hole 110 or the diameter of the equivalent circle of the positioning hole 110 is less than 10 μm, the aperture is too small, which is not conducive to the CCD camera to collect structural colors through the positioning hole 110, and even if the CCD camera can collect structural colors, the chromaticity of the collected structural colors will be weak due to the small amount of light reflected or diffracted from the positioning hole 110. When the diameter of the positioning hole 110 or the diameter of the equivalent circle of the positioning hole 110 is greater than 400 μm, the aperture size is too large, which greatly increases the area of ​​the opening on the first base substrate 100, reducing the self-strength of the first base substrate 100. Therefore, under the condition of satisfying the structural color collection of the CCD camera, the size of the positioning hole 110 should not be too large.

[0067] In addition, the size of the positioning hole 110 is also affected by the thickness of the first base substrate 100. When the thickness of the first base substrate 100 increases, the size of the positioning hole 110 can be appropriately increased; conversely, when the thickness of the first base substrate 100 decreases, the size of the positioning hole 110 can be appropriately reduced.

[0068] In some embodiments, Figure 6 to Figure 7 As shown, a second actuator film 400 is further provided on the surface of the second base substrate 200 facing the first base substrate 100, and the second actuator film 400 is provided at the edge of the second base substrate 200; the structural color actually displayed by the first actuator film 210 passing through the positioning hole 110 is used for chromaticity comparison with the structural color displayed by the second actuator film 400, so as to align the first base substrate 100 and the second base substrate 200.

[0069] In this embodiment, the second actuator film 400 and the first actuator film 210 are actuator films of the same material and size. The second actuator film 400 is arranged at the edge of the second base substrate 200 to facilitate observation of its structural color. The shape and size of the first base substrate 100 and the second base substrate 200 are not necessarily exactly the same. Therefore, it is not easy to be blocked by the first base substrate 100 when it is arranged at the edge. In this case, the structural color of the second actuator film 400 can be conveniently observed even after the two are attached. The second actuator film 400 is arranged at the edge of the second base substrate 200 as a reference. No positioning hole 110 is arranged at the relative position of the first base substrate 100 and the second actuator film 40. Before the first base substrate 100 and the second base substrate 200 are attached and aligned, the second actuator film 400 is first driven to generate a predetermined deformation under a predetermined driving process, and the corresponding structural color is collected by a CCD camera 300. Then the first base substrate 100 and the second base substrate 200 are aligned and bonded. During the alignment process, the first actuator film 210 adopts the same predetermined driving process as the second actuator film 400, and causes the first actuator film 210 to deform. Since the deformation of the first actuator film 210 is limited by the positioning hole 110, the deformation of the second actuator film 400 under the predetermined driving process is not limited.

[0070] Specifically, the second actuator film 400 generates a predetermined deformation under the action of a predetermined driving process and displays a predetermined structural color; during the bending deformation of the actuator film, the spacing between the micropores of the micropore array structure 211 increases, and the structural color changes according to the degree of deformation.

[0071] When the first actuator film 210 is precisely aligned with the positioning hole 110, its deformation is not restricted by the edge of the positioning hole 110. The first actuator film 210 and the second actuator film 400 produce the same deformation under the predetermined driving process, and the chromaticity of the displayed structural color is the same. The alignment of the first base substrate 100 and the second base substrate 200 is completed.

[0072] This embodiment uses the second actuator film 400 as a reference to compare the structural color with the first actuator film 210, which can more conveniently and quickly determine the alignment effect without the need to pre-acquire the structural color chromaticity values ​​of the first actuator film 210 under different deformation conditions. Therefore, there is no need to use a CCD camera to pre-collect the structural color chromaticity values, and it is only necessary to observe with the naked eye whether the actual structural color displayed by the first actuator film 210 is the same as the predetermined structural color displayed by the second actuator film 400, thereby further simplifying the alignment process.

[0073] Of course, the predetermined structural color displayed by the second actuator film 400 and the structural color displayed by the first actuator film 210 can also be collected by a CCD camera, and the positions of the first base substrate 100 and the second base substrate 200 can be adjusted according to whether the colors of the two are the same. The second aspect of the present application provides an electronic device, which includes the display panel in any embodiment of the first aspect.

[0074] The electronic device proposed in the embodiment of the present application, in the display panel used in the electronic device, the substrate uses structural color to indicate the degree of alignment accuracy, which is faster and more intuitive, and the alignment accuracy can be judged only by the chromaticity of the structural color, avoiding the use of professional equipment and complex processes, and reducing production costs. The chromaticity of different structural colors can be collected by the CCD camera 300, and the distinction can be made more accurately, with an accuracy of tens of nanometers, effectively improving the alignment accuracy of the multi-layer flexible electronic device layer. Avoid problems such as reduced performance, short circuits, or scrapped boards caused by misalignment of the multi-layer flexible electronic device layer in the display panel of the electronic device, or circuits not being printed on the surface of the printed circuit board as required.

[0075] A third aspect of the present application provides a substrate alignment method for aligning a first substrate 100 and a second substrate 200 in a display panel in any embodiment of the first aspect. The alignment method includes the following steps:

[0076] S1. Providing the first substrate and the second substrate, wherein the first substrate is provided with the positioning hole, the surface of the second substrate facing the first substrate is provided with the first actuator film, and a micropore array structure is formed on the surface of the first actuator film;

[0077] S2, obtaining the structural color of the first actuator film 210 under a predetermined deformation condition;

[0078] S3, aligning the positioning hole 110 and the first actuator film 210;

[0079] S4, providing natural light, and obliquely irradiating the natural light to the micro-hole array structure 211 through the positioning hole 110 at a first angle, so that the micro-hole array can periodically modulate the natural light and display structural color;

[0080] S5. Using the same driving process as the predetermined deformation, the first actuator film 210 is driven to deform, the positioning hole 110 limits the deformation of the first actuator film 210, and the actual structural color corresponding to the deformation is collected through the positioning hole 110;

[0081] S6 , aligning the first base substrate 100 and the second base substrate 200 based on the collected structural color displayed after the first actuator film 210 generates a predetermined deformation and the actually displayed structural color collected through the positioning hole 110 .

[0082] In the embodiment of the present application, a microporous array structure 211 is provided on the first actuator film 210, and natural light is irradiated on the microporous array structure 211 to cause diffraction and interference to show structural color. The first actuator film 210 uses a shape memory material, and produces a predetermined deformation under the action of a predetermined driving process; specifically, the film produces a bending deformation, and during the bending process, the spacing between the micropores of the microporous array structure 211 increases, and the structural color changes. In addition, the same driving process corresponds to the same deformation amount and produces the same structural color. The predetermined structural color under the predetermined deformation condition produced by the predetermined driving process is obtained as a reference for alignment.

[0083] A positioning hole 110 is provided on the first base substrate 100, and correspondingly, a first actuator film 210 is provided on the surface of the second base substrate 200 facing the first base substrate 100. When the first base substrate 100 and the second base substrate 200 are aligned, the positioning hole 110 and the first actuator film 210 are used as positioning points, and the positioning hole 110 and the first actuator film 210 are relatively aligned.

[0084] The first base substrate 100 is bonded to the second base substrate 200, the first actuator film 210 is opposite to the positioning hole 110, and natural light is obliquely incident on the micro-hole array structure 211 through the positioning hole 110. The micro-hole array structure 211 periodically modulates the natural light to show structural color.

[0085] The first actuator film 210 is deformed by using the same driving process as the predetermined deformation. When there is a deviation in the alignment, the first actuator film 210 is deformed and abuts against the edge of the positioning hole 110. At this time, the deformation of the first actuator film 210 under the predetermined driving process is limited by the positioning hole 110 and cannot reach the predetermined deformation. The structural color actually displayed by the first actuator film 210 is different from the chromaticity of the structural color generated by the same driving process. The positions of the first base substrate 100 and the second base substrate 200 are adjusted. When the chromaticity of the structural color actually displayed through the positioning hole 110 is consistent with the chromaticity of the structural color generated by the same driving process, the first actuator film 210 is not limited by the edge of the positioning hole 110, and the actual deformation is the same as the deformation under the same driving process, and the same structural color is generated, indicating that the alignment is accurate.

[0086] In this embodiment, the degree of alignment accuracy is expressed by structural color, which is faster and more intuitive. The alignment accuracy can be judged only by the chromaticity of the structural color, avoiding the use of professional equipment and complex processes, and effectively improving the alignment accuracy of multi-layer flexible electronic device layers.

[0087] In some embodiments, Figure 5 As shown, during the alignment process of the base substrate, the structural color displayed by the first actuator film 210 is collected by the CCD camera 300. When the actual displayed structural color photographed by the CCD camera 300 through the positioning hole 110 is consistent with the predetermined structural color corresponding to the first actuator film 210 under the predetermined deformation condition, the alignment of the first base substrate 100 and the second base substrate 200 is completed; the normal direction of the CCD camera 300 and the positioning hole 110 is at a preset angle α, and the preset angle α is 0° to 90°, for example, the preset angle is 10°, 15°, 30°, 45°, 60°, etc.

[0088] In this embodiment, a CCD camera 300 is arranged on the reflected light path of the first actuator film 210 when natural light passes through the positioning hole 110 and is projected onto the first actuator film 210. The CCD camera 300 and the normal direction of the positioning hole 110 form a preset angle, and the preset angle is α0° to 90°, excluding 0° and 90°, that is, the CCD camera 300 is not parallel or perpendicular to the normal direction of the positioning hole 110. For example, the CCD camera 300 and the normal direction of the positioning hole 110 form an angle of 30°, and the chromaticity of the structural color displayed by the first actuator film 210 is collected by the CCD camera 300. Specifically, when the actual structural color displayed by the CCD camera 300 through the positioning hole 110 is consistent with the predetermined structural color corresponding to the first actuator film 210 under the predetermined deformation condition, the first base substrate 100 and the second base substrate 200 are aligned, and the accuracy reaches the order of tens of nanometers.

[0089] Furthermore, a preset angle α between the CCD camera 300 and the normal direction of the positioning hole 110 is 0°-45°. Within this angle range, it is easier for the CCD camera to collect structural colors through the positioning hole 110 .

[0090] It can be understood that the distance between the CCD camera and the first base substrate 100 should not be too far or too close, so as to be suitable for structural color acquisition. For example, the distance between the CCD camera and the first base substrate 100 can be 2 cm-20 cm.

[0091] In some embodiments, a second actuator film 400 is further provided on the surface of the second base substrate 200 facing the first base substrate 100, and the second actuator film 400 is arranged at the edge of the second base substrate 200; a second actuator film 400 is further provided on the surface of the second base substrate 200 facing the first base substrate 100, and the second actuator film 400 is arranged at the edge of the second base substrate 200; based on the predetermined structural color displayed by the second actuator film 400 under predetermined deformation conditions and the structural color actually displayed by the first actuator film 210 collected through the positioning hole 110, the first base substrate 100 and the second base substrate 200 are aligned.

[0092] In this embodiment, the first base substrate 100 and the second base substrate 200 are aligned and bonded, and the second actuator film 400 is set at the edge of the second base substrate 200 as a reference. During the alignment process, the positioning hole 110 limits the deformation of the first actuator film 210 under the predetermined driving process, while the deformation of the second actuator film 400 under the predetermined driving process is not limited. It can be understood that the second actuator film 400 generates a predetermined deformation under the predetermined driving process and displays a predetermined structural color.

[0093] The structural color of the second actuator film 400 under the predetermined deformation condition is compared with the structural color produced by the first actuator film 210 under the same deformation condition. When the actual structural color of the first actuator film 210 is consistent with the actual structural color of the second actuator film 400, it means that the first actuator film 210 is accurately aligned with the positioning hole 110, the deformation process of the first actuator film 210 is not restricted by the edge of the positioning hole 110, the first actuator film 210 and the second actuator film 400 produce the same deformation under the predetermined driving process, the displayed structural colors are the same, and the first substrate 100 and the second substrate 200 are aligned.

[0094] In this embodiment, by setting the second actuator film 400, there is no need to pre-acquire the structural color chromaticity values ​​of the first actuator film 210 under different deformation conditions. Therefore, there is no need to use a CCD camera to collect signals in advance. Instead, it is only necessary to observe with the naked eye whether the structural color actually displayed by the first actuator film 210 is the same as the structural color displayed by the second actuator film 400, thereby further simplifying the alignment process.

[0095] The above are only preferred embodiments of the present application and are not intended to limit the protection scope of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application are included in the protection scope of the present application.

Claims

1. A display panel, characterized in that, it at least includes a first substrate and a second substrate, at least one positioning hole is provided on the first substrate, and a first actuator film with the same number and opposite positions to the positioning holes is provided on the surface of the second substrate facing the first substrate; a microporous array structure is provided on the surface of the first actuator film facing the first substrate, and the microporous array structure can periodically modulate natural light passing through the positioning hole and irradiating on the surface of the microporous array structure, and present structural color; the first actuator film is a shape memory material, and the first actuator film can generate a predetermined deformation under the action of a predetermined driving process; the positioning hole is used to limit the deformation generated by the first actuator film under the predetermined driving process; the structural color presented by the first actuator film can pass through the positioning hole, and is used to align the first substrate and the second substrate during the manufacturing process of the display panel based on the structural color presented after the first actuator film generates deformation collected.

2. The display panel according to claim 1, characterized in that, the orthographic projection of the positioning hole on the first actuator film falls within the range of the first actuator film.

3. The display panel according to claim 1, characterized in that, the first actuator film is one of a thermally induced shape memory material, a photoinduced shape memory material, a pH-induced shape memory material, an electroinduced shape memory material or a magnetically induced shape memory material, and generates a predetermined deformation under the action of a driving process of heating, light irradiation, pH value adjustment, applying an electric field or applying a magnetic field respectively.

4. The display panel according to claim 1, characterized in that, the diameter of the micropores in the microporous array structure is 0.5 μm - 2 μm, and the distance between the micropores is 0.5 μm - 2 μm.

5. The display panel according to claim 1, characterized in that, the first actuator film includes a single-layer or double-layer organic film.

6. The display panel according to claim 5, characterized in that, the first actuator film further includes an inorganic film provided on the surface of the single-layer organic film or the double-layer organic film; or the first actuator film further includes an inorganic film provided between the double-layer organic films.

7. The display panel according to any one of claims 1 - 6, characterized in that, the positioning hole is a circular hole, a square hole or a closed polygon hole.

8. The display panel according to claim 7, characterized in that, the diameter of the positioning hole or the diameter of the equivalent circle of the positioning hole is 10 μm - 400 μm.

9. The display panel according to claim 1, characterized in that, a second actuator film is further provided on the surface of the second substrate facing the first substrate, and the second actuator film is provided at the edge of the second substrate; the structural color presented by the first actuator film passing through the positioning hole is used to compare with the structural color presented by the second actuator film to align the first substrate and the second substrate.

10. An electronic device, comprising the display panel according to any one of claims 1-9.

11. An alignment method for a substrate, for aligning the first substrate and the second substrate in the display panel according to any one of claims 1-9, characterized in that it comprises the following steps: providing the first substrate and the second substrate, the first substrate being provided with the positioning holes, and the surface of the second substrate facing the first substrate being correspondingly provided with the first actuator film, and a microporous array structure being formed on the surface of the first actuator film; acquiring the predetermined structural color presented by the first actuator film under the predetermined deformation condition; positioning the positioning holes and the first actuator film opposite to each other; providing natural light, and obliquely irradiating the natural light through the positioning holes to the microporous array structure at a first angle, the microporous array being capable of periodically modulating the natural light and presenting a structural color; adopting a driving process same as the predetermined deformation to drive the first actuator film to generate deformation, the positioning holes restricting the deformation of the first actuator film, and collecting the actually presented structural color corresponding to the deformation through the positioning holes; aligning the first substrate and the second substrate based on the structural color presented by the first actuator film after generating the predetermined deformation and the actually presented structural color collected through the positioning holes.

12. The alignment method for a substrate according to claim 11, characterized in that during the alignment process of the substrate, the structural color presented by the first actuator film is collected by a CCD camera, and when the actually presented structural color photographed by the CCD camera through the positioning holes is consistent with the predetermined structural color corresponding to the first actuator film under the predetermined deformation condition, the alignment of the first substrate and the second substrate is completed; the CCD camera forms a preset included angle with the normal direction of the positioning holes, and the preset included angle is 0° to 90°.

13. The alignment method for a substrate according to claim 11, characterized in that the surface of the second substrate facing the first substrate is further provided with a second actuator film, and the second actuator film is arranged at the edge of the second substrate; aligning the first substrate and the second substrate based on the predetermined structural color presented by the second actuator film under the predetermined deformation condition and the actually presented structural color of the first actuator film collected through the positioning holes.

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