Display screen splicing method, display screen and VR glasses

Abstract

The application relates to a display screen splicing method, a display screen and VR glasses. The display screen splicing method comprises the following steps: providing a first substrate and a second substrate; splicing an optical film on the first substrate by means of solid-state optical glue; and splicing the second substrate on the side of the optical film away from the solid-state optical glue by means of liquid-state optical glue, and performing solidification treatment on the liquid-state optical glue to obtain a display screen. Before the step of splicing the optical film on the first substrate by means of the solid-state optical glue, the display screen splicing method further comprises the following steps: selecting solid-state optical glue with a preset strength; and / or after the step of splicing the second substrate on the side of the optical film away from the solid-state optical glue by means of the liquid-state optical glue, and performing solidification treatment on the liquid-state optical glue to obtain the display screen, the display screen splicing method further comprises the following step: performing annealing treatment on the display screen. The display screen splicing method can improve the bubble problem caused by the solidification of the liquid-state optical glue.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display screens, in particular to a display screen splicing method, a display screen and a VR glasses. BACKGROUND

[0002] The splicing process of the display screen includes splicing an optical film on a substrate glass by using optical adhesive (OCA), and then splicing a cover glass on the side of the optical film away from the optical adhesive (OCA) by using liquid optical adhesive (LOCA).

[0003] However, the display screen prepared by the traditional splicing process has the problem of air bubbles, which affects the appearance and experience of the display screen, and also affects the reliability of the display screen. SUMMARY

[0004] Therefore, it is necessary to provide a display screen splicing method, a display screen and VR glasses to solve the problem of air bubbles in the display screen prepared by the traditional splicing process.

[0005] According to a first aspect of the present application, a display screen splicing method is provided, comprising:

[0006] providing a first substrate and a second substrate;

[0007] splicing an optical film on the first substrate by using solid optical adhesive;

[0008] splicing the second substrate on the side of the optical film away from the solid optical adhesive by using liquid optical adhesive, and performing solidification treatment on the liquid optical adhesive to obtain a display screen;

[0009] Before the step of splicing the optical film on the first substrate by using solid optical adhesive, the display screen splicing method further comprises: selecting solid optical adhesive with a preset strength; and / or

[0010] After the step of splicing the second substrate on the side of the optical film away from the solid optical adhesive by using liquid optical adhesive, and performing solidification treatment on the liquid optical adhesive to obtain a display screen, the display screen splicing method further comprises: performing annealing treatment on the display screen.

[0011] In one embodiment, when the first substrate and the second substrate are curved substrates, and the display screen splicing method further comprises selecting solid optical adhesive with a preset strength, the step of selecting solid optical adhesive with a preset strength specifically comprises:

[0012] selecting solid optical adhesive with a preset Young's modulus according to the radius of curvature of the curved surface of the first substrate and / or the second substrate.

[0013] In one embodiment, the preset Young's modulus is 3x10 5 Pa-4x10 5 Pa.

[0014] In one embodiment, when the display screen bonding method further comprises annealing the display screen, the annealing the display screen specifically comprises:

[0015] warming the display screen from room temperature to a preset annealing temperature;

[0016] performing a heat preservation treatment on the display screen for a first preset time;

[0017] cooling the display screen to room temperature within a second preset time.

[0018] In one embodiment, in the process of warming the display screen from room temperature to a preset annealing temperature, the warming time is 10-30 minutes.

[0019] In one embodiment, the preset annealing temperature is 60-90℃.

[0020] In one embodiment, the first preset time is 1-4 hours.

[0021] In one embodiment, the second preset time is 1-4 hours.

[0022] In one embodiment, the bonding the optical film on the first substrate by means of the solid optical adhesive specifically comprises:

[0023] performing a vacuumizing treatment on the bonding environment, and bonding the optical film on the first substrate by means of the solid optical adhesive.

[0024] In one embodiment, after the second substrate is bonded on the side of the optical film away from the solid optical adhesive by means of the liquid optical adhesive and the liquid optical adhesive is cured, the display screen bonding method further comprises a defoaming treatment on the display screen.

[0025] According to a second aspect of the present application, a display screen is provided, which is prepared by the display screen bonding method of any of the above embodiments.

[0026] According to a third aspect of the present application, a VR glasses is provided, comprising the display screen.

[0027] The display screen splicing method, the display screen and the VR glasses have the following advantages: the display screen splicing method can improve the bubble problem caused by the internal stress generated by the curing shrinkage of the liquid optical adhesive, thereby improving the reliability of the prepared display screen, improving the appearance of the display screen, and improving the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 A flowchart of a display screen splicing method according to an embodiment of the present application is shown.

[0029] Figures 2(a)-2(c) A process diagram of preparing a display screen using the display screen splicing method according to the present application is shown.

[0030] Figure 3 A flowchart of a display screen splicing method according to another embodiment of the present application is shown.

[0031] Figure 4 A flowchart of annealing a display screen in a display screen splicing method according to an embodiment of the present application is shown.

[0032] Figure 5 A flowchart of a display screen splicing method according to yet another embodiment of the present application is shown.

[0033] Figure 6 A graph showing the functional relationship between temperature T (℃) and time t (h) in the annealing process of a display screen is shown.

[0034] Reference signs: 10, display screen, 110, first substrate; 120, second substrate; 130, solid optical adhesive; 140, optical film; 150, liquid optical adhesive; step S210; step S220; step S230; step S240; step S310; step S320; step S330; step S340; step S341; step S342; step S343; step S410; step S420; step S430; step S440; step S450. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0036] In the description of the application, it should be understood that, if there are these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0037] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0038] In this application, unless otherwise explicitly specified and limited, if there are terms such as "mounting", "connecting", "connecting", "fixing" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0039] In this application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on or under second feature", the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0040] It is to be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar terms as used herein are for the purpose of illustration only and do not indicate the only orientation of the embodiments.

[0041] It is found through research that the reason why the display screen prepared by the traditional bonding process has the air bubble problem is that: after the cover plate glass is bonded to the side of the optical film away from the optical adhesive (OCA) by means of the liquid optical adhesive (LOCA), the liquid optical adhesive (LOCA) needs to be cured, and the liquid optical adhesive (LOCA) will shrink during the curing process, and will also generate internal stress due to the shrinkage. This part of the internal stress will be transmitted to the optical adhesive (OCA), and then micro air bubbles will be generated in the optical adhesive (OCA), and then the display screen prepared by the traditional bonding process will have the air bubble problem.

[0042] In order to solve at least one of the above problems, the present application designs a bonding method of a display screen, which can reduce the influence of the internal stress generated by the shrinkage of the liquid optical adhesive (LOCA) during the curing process on the optical adhesive (OCA), and then improve the air bubble problem caused by the internal stress.

[0043] Figure 1 The flowchart of the bonding method of the display screen in different embodiments of the present application is shown.

[0044] Please refer to Figure 1 , and in combination with Figures 2(a)-2(c) The bonding method of the display screen provided by an embodiment of the present application comprises the following steps:

[0045] S210, a first substrate 110 and a second substrate 120 are provided. The first substrate 110 and the second substrate 120 can both be curved substrates, or both be flat substrates, which are not specifically limited here. For example, the first substrate 110 is a display substrate, and the second substrate 120 is a cover plate glass.

[0046] S220, as shown in FIG. 2(a), a solid optical adhesive 130 with a preset strength is selected.

[0047] S230, as shown in FIG. 2(b), the optical film 140 is bonded to the first substrate 110 by means of the solid optical adhesive 130.

[0048] S240, as shown in Figure 2(c), the second substrate 120 is aligned and attached to the optical film 140 away from the solid optical adhesive 130 by means of the liquid optical adhesive 150, and the liquid optical adhesive 150 is cured to obtain the display screen 10.

[0049] Since the solid optical adhesive 130 with a preset strength is selected, the strength of the solid optical adhesive 130 is large and is not easy to deform, that is, the solid optical adhesive 130 can have a certain deformation stability after being aligned and attached to the first substrate 110. Therefore, the influence of the internal stress generated by the curing and shrinkage of the liquid optical adhesive 150 on the solid optical adhesive 130 is small, which can reduce the influence of the internal stress generated by the curing and shrinkage of the liquid optical adhesive 150 on the solid optical adhesive 130, and further improve the bubble problem caused by the internal stress. Therefore, by using the display screen attachment method, the reliability of the prepared display screen can be improved, the appearance of the display screen can be improved, and the user experience can also be improved.

[0050] Optionally, when the first substrate 110 and the second substrate 120 are curved substrates, and the display screen attachment method further comprises selecting a solid optical adhesive 130 with a preset strength, the solid optical adhesive 130 with a preset strength is selected, which specifically comprises:

[0051] According to the curvature radius of the curved surface of the first substrate 110 and / or the second substrate 120, a solid optical adhesive 130 with a preset Young's modulus is selected.

[0052] Since the solid optical adhesive 130 has a preset Young's modulus, the solid optical adhesive 130 is not easy to deform after being aligned and attached to the first substrate 110, that is, the solid optical adhesive 130 aligned and attached to the first substrate 110 can have a certain deformation stability, which can reduce the influence of the internal stress generated by the curing and shrinkage of the liquid optical adhesive 150 on the solid optical adhesive 130, and further improve the bubble problem caused by the internal stress. Therefore, by using the display screen attachment method, the reliability of the prepared display screen can be improved, the appearance of the display screen can be improved, and the user experience can also be improved.

[0053] It should be noted that the solid optical adhesive 130 with a preset Young's modulus can be deformed and attached to the first substrate 110, and the internal stress generated by the curing and shrinkage of the liquid optical adhesive 150 is small, so that the solid optical adhesive 130 with a preset Young's modulus is not easy to deform. Therefore, the influence of the internal stress generated by the curing and shrinkage of the liquid optical adhesive 150 on the solid optical adhesive 130 can be reduced, and the bubble problem caused by the internal stress can be improved.

[0054] Specifically, the preset Young's modulus is 3x10 5 Pa-4x105 Pa.

[0055] For example, the Young's modulus of the solid optical adhesive 130 can be 3 x 10 5 Pa, 3.5 x 10 5 Pa, or 4 x 10 5 Pa.

[0056] If the preset Young's modulus is too large, the solid optical adhesive 130 cannot be well aligned and attached to the first substrate 110. If the preset Young's modulus is too small, the internal stress generated by the solidification and shrinkage of the liquid optical adhesive 150 cannot be ignored. Therefore, the Young's modulus of the solid optical adhesive 130 needs to be set in an appropriate range, for example, the preset Young's modulus can be set to 3 x 10 5 -4 x 10 5 Pa, so that the solid optical adhesive 130 can be well aligned and attached to the first substrate 110, and the influence of the internal stress generated by the solidification and shrinkage of the liquid optical adhesive 150 on the solid optical adhesive 130 can be reduced.

[0057] Setting the preset Young's modulus to 3 x 10 5 -4 x 10 5 Pa can make the solid optical adhesive 130 with the preset Young's modulus well applicable to the first substrate 110 with a 2.5D curved surface or a 3D curved surface.

[0058] Optionally, aligning and attaching the second substrate 120 to the side of the optical film 140 away from the solid optical adhesive 130 by means of the liquid optical adhesive 150 and performing a solidification treatment on the liquid optical adhesive 150 to obtain the display screen 10 can include:

[0059] Forming the liquid optical adhesive 150 on the side of the optical film 140 away from the solid optical adhesive 130 by means of dispensing; stopping dispensing when the thickness of the liquid optical adhesive 150 reaches a preset thickness; attaching the second substrate 120 to the side of the liquid optical adhesive 150 away from the optical film 140, so that the second substrate 120 is aligned and attached to the side of the optical film 140 away from the solid optical adhesive 130 by means of the liquid optical adhesive 150, and performing a solidification treatment on the liquid optical adhesive 150 to obtain the display screen 10.

[0060] Compared with the solid optical adhesive 130, the liquid optical adhesive 150 has the advantages of lower cost and better light transmission, and the second substrate 120 is hard-to-hard attached to the first substrate 110. The second substrate 120 can be better aligned and attached to the side of the optical film 140 away from the solid optical adhesive 130 by means of the liquid optical adhesive 150, which is conducive to improving the reliability and quality of the display screen.

[0061] Please refer toFigure 3 The display screen bonding method provided by another embodiment of the present application comprises the following steps:

[0062] S310, providing a first substrate 110 and a second substrate 120. The first substrate 110 and the second substrate 120 can both be curved substrates or both be flat substrates, which are not specifically limited herein.

[0063] S320, bonding the optical film 140 on the first substrate 110 by means of the solid optical adhesive 130.

[0064] S330, bonding the second substrate 120 on the side of the optical film 140 away from the solid optical adhesive 130 by means of the liquid optical adhesive 150, and performing a solidification treatment on the liquid optical adhesive 150, so as to obtain the display screen 10.

[0065] S340, performing an annealing treatment on the display screen 10.

[0066] It can be understood that, by performing the annealing treatment on the display screen 10, the internal stress generated after the solidification and shrinkage of the liquid optical adhesive 150 can be effectively eliminated, the effect of the internal stress generated after the solidification and shrinkage of the liquid optical adhesive 150 on the solid optical adhesive 130 can be reduced, and the possibility of the generation of the air bubble problem caused by the internal stress can be reduced, so that the reliability of the display screen prepared can be improved, the appearance of the display screen can be improved, and the user experience can also be improved.

[0067] In the embodiment, please refer to Figure 4 The annealing treatment on the display screen 10 specifically comprises the following steps:

[0068] S341, increasing the temperature of the display screen 10 from room temperature to a preset annealing temperature.

[0069] The preset annealing temperature refers to a temperature capable of performing a stress relief treatment on the liquid optical adhesive 150, and also refers to a temperature which does not cause adverse effects on the first substrate 110, the second substrate 120, the solid optical adhesive 130, the optical film 140 and the liquid optical adhesive 150.

[0070] S342, performing a heat preservation treatment on the display screen 10 within a first preset time.

[0071] S343, decreasing the temperature of the display screen 10 to room temperature within a second preset time.

[0072] In this way, the display screen 10 can be heated to the preset annealing temperature, and then the display screen 10 is subjected to a heat preservation treatment for a first preset time, and then the display screen 10 is subjected to a cooling treatment. In this way, the internal stress generated after the solidification and shrinkage of the liquid optical adhesive 150 can be well eliminated, the effect of the internal stress generated after the solidification and shrinkage of the liquid optical adhesive 150 on the solid optical adhesive 130 can be reduced, and the possibility of the generation of bubbles due to the internal stress can be reduced.

[0073] In some embodiments, the preset annealing temperature is 60-90°C. Specifically, the annealing temperature of the display screen 10 can be 60°C, 65°C, 70°C, 75°C, 80°C, 85°C or 90°C.

[0074] If the annealing temperature of the display screen 10 is too low, the internal stress generated after the solidification and shrinkage of the liquid optical adhesive 150 of the display screen 10 cannot be well eliminated. If the annealing temperature of the display screen 10 is too high, the display screen 10 can be adversely affected by the high temperature, such as deformation or poor stability. Therefore, it is necessary to control the annealing temperature of the display screen 10 within an appropriate range, such as setting the preset annealing temperature to 60-90°C. In this way, the internal stress generated after the solidification and shrinkage of the liquid optical adhesive 150 can be well eliminated, the possibility of the generation of bubbles due to the internal stress can be reduced, and the display screen 10 will not be adversely affected by the high temperature.

[0075] In some embodiments, in the process of heating the display screen 10 from room temperature to the preset annealing temperature, the heating time is 10-30 minutes. Specifically, the heating time can be 10 minutes, 15 minutes, 20 minutes, 25 minutes or 30 minutes.

[0076] If the heating time is too short, the heating speed of the display screen 10 will be too fast at the same preset annealing temperature, which can easily generate thermal stress inside the display screen 10 and cause the display screen 10 to deform. If the heating time is too long, more energy will be consumed, which can affect the efficiency of the annealing treatment of the display screen 10. Therefore, it is necessary to control the heating time within an appropriate time range, such as setting the heating time to 10-30 minutes. In this way, the possibility of the generation of thermal stress inside the display screen 10 can be reduced, the efficiency of the annealing treatment can be improved, and the internal stress generated after the solidification and shrinkage of the liquid optical adhesive 150 can be eliminated at the same time.

[0077] In some embodiments, the first preset time is 1-4 hours. Specifically, the first preset time can be 1 hour, 2 hours, 3 hours or 4 hours.

[0078] If the first preset time is too short, the internal stress generated after the solidification and shrinkage of the liquid optical adhesive 150 cannot be completely released. If the first preset time is too long, new stress such as thermal stress can be generated in the display screen 10, thereby affecting the stability of the display screen 10. Therefore, the first preset time needs to be controlled within a proper range, which is beneficial to the release of the internal stress generated after the solidification and shrinkage of the liquid optical adhesive 150 and does not affect the stability of the display screen 10.

[0079] In some embodiments, the second preset time is 1h-4h. For example, the second preset time is 1h, 2h, 3h or 4h.

[0080] If the second preset time is too short, the cooling speed is too fast, thereby causing new stress in the display screen 10 and the internal stress cannot be completely released. If the second preset time is too long, unnecessary additional energy consumption can be caused, thereby reducing the efficiency of the annealing process. Therefore, the second preset time needs to be controlled within a proper range, which is beneficial to the release of the internal stress generated after the solidification and shrinkage of the liquid optical adhesive 150 and does not easily cause new stress in the display screen 10, thereby improving the stability of the display screen 10 and the efficiency of the annealing process.

[0081] Please refer to Figure 5 The display screen bonding method provided in another embodiment of the present application includes the following steps:

[0082] S410, a first substrate 110 and a second substrate 120 are provided. The first substrate 110 and the second substrate 120 can both be curved substrates or both be flat substrates, which are not specifically limited herein.

[0083] S420, a solid optical adhesive 130 with a preset strength is selected.

[0084] S430, an optical film 140 is aligned and bonded to the first substrate 110 by means of the solid optical adhesive 130.

[0085] S440, the second substrate 120 is aligned and bonded to the side of the optical film 140 away from the solid optical adhesive 130 by means of a liquid optical adhesive 150, and the liquid optical adhesive 150 is subjected to a solidification process, so as to obtain a display screen 10.

[0086] S450, the display screen 10 is subjected to an annealing process.

[0087] In one aspect, since the solid optical adhesive 130 with a preset strength is selected, the strength of the solid optical adhesive 130 is large and is not prone to deformation, that is, the solid optical adhesive 130 can have a certain deformation stability after being attached to the first substrate 110, and then the influence of the internal stress generated by the solidification shrinkage of the liquid optical adhesive 150 on the solid optical adhesive 130 is small, so that the influence of the internal stress generated by the solidification shrinkage of the liquid optical adhesive 150 on the solid optical adhesive 130 can be reduced, and the bubble problem caused by the internal stress can be improved.

[0088] On the other hand, the annealing treatment of the display screen 10 can effectively eliminate the internal stress generated after the solidification shrinkage of the liquid optical adhesive 150, reduce the effect of the internal stress generated after the solidification shrinkage of the liquid optical adhesive 150 on the solid optical adhesive 130, and further reduce the possibility of the bubble problem caused by the internal stress.

[0089] Therefore, by using the attachment method of the display screen, the reliability of the prepared display screen can be improved, the appearance of the display screen can be improved, and the user experience can also be improved.

[0090] In some embodiments, the optical film 140 is attached to the first substrate 110 by means of the solid optical adhesive 130, specifically including:

[0091] The attachment environment is vacuumized, and the optical film 140 is attached to the first substrate 110 by means of the solid optical adhesive 130.

[0092] In this way, the optical film 140 can be well attached to the first substrate 110 by means of the solid optical adhesive 130, and bubbles are not prone to be generated between the optical film 140 and the solid optical adhesive 130, between the solid optical adhesive 130 and the first substrate 110.

[0093] In some embodiments, after the second substrate 120 is attached to the side of the optical film 140 away from the solid optical adhesive 130 by means of the liquid optical adhesive 150 and the liquid optical adhesive 150 is subjected to a solidification treatment to obtain the display screen 10, the attachment method of the display screen further includes a defoaming treatment of the display screen 10.

[0094] In this way, the bubbles between the optical film 140 and the solid optical adhesive 130, between the solid optical adhesive 130 and the first substrate 110, inside the liquid optical adhesive 150, between the liquid optical adhesive 150 and the optical film 140, and between the liquid optical adhesive 150 and the second substrate 120 can be well eliminated, the possibility of the bubble problem can be reduced, the appearance of the display screen can be improved, the reliability of the display screen can be improved, and the user experience can also be improved.

[0095] In some embodiments, the display screen assembling method comprises the following steps:

[0096] S210, providing a first substrate 110 and a second substrate 120, both of which are curved substrates.

[0097] S220, selecting a solid optical glue 130 with a preset strength, wherein the Young's modulus of the solid optical glue 130 is 3x10 5 Pa.

[0098] S230, aligning and assembling the optical film 140 on the first substrate 110 by means of the solid optical glue 130.

[0099] S240, aligning and assembling the second substrate 120 on the side of the optical film 140 away from the solid optical glue 130 by means of the liquid optical glue 150, and performing a solidification treatment on the liquid optical glue 150 to obtain the display screen 10.

[0100] In the control group, the solid optical glue 130 with the preset strength is not selected, and the display screen is not annealed. Table 1 below shows the comparison test data of the display screen obtained in the control group and the display screen prepared by the display screen assembling method of this embodiment (Embodiment 1).

[0101] Table 1 Comparison test data of the display screen obtained in the control group and the display screen prepared by the display screen assembling method of Embodiment 1

[0102]

[0103] From Table 1, compared with the control group, in this application, since the solid optical glue 130 with the preset strength is selected, the influence of the internal stress generated by the solidification shrinkage of the liquid optical glue 150 on the solid optical glue 130 can be well reduced, and the air bubble problem caused by the internal stress can be improved. Therefore, the display screen assembling method of this application can improve the reliability of the prepared display screen, improve the appearance of the display screen, and also be beneficial to improve the user experience.

[0104] In some other embodiments, the display screen assembling method comprises the following steps:

[0105] S310, providing a first substrate 110 and a second substrate 120, both of which are curved substrates.

[0106] S320, aligning and assembling the optical film 140 on the first substrate 110 by means of the solid optical glue 130.

[0107] S330, the second substrate 120 is aligned and bonded to the side of the optical film 140 away from the solid optical adhesive 130 by means of liquid optical adhesive 150, and the liquid optical adhesive 150 is cured to obtain the display screen 10.

[0108] S340, Anneal the display screen 10.

[0109] Please refer to Figure 6 ( Figure 6 A graph showing the functional relationship between temperature T (°C) and time t (h) during the annealing process of the display screen 10 is provided. The annealing process of the display screen 10 specifically includes:

[0110] S341. Heat the display screen 10 from room temperature to 85°C within 20 minutes.

[0111] S342. Perform heat preservation treatment on display screen 10 within 2 hours.

[0112] S343. Cool the display screen 10 to room temperature within 2 hours, and keep the display screen 10 at room temperature for 2 hours.

[0113] In the control group, solid optical adhesive 130 with a preset strength was not selected, and the display screen was not annealed. Table 2 below shows the comparative test data of the display screen obtained in the control group and the display screen prepared by the bonding method of the display screen in this embodiment (Example 2).

[0114] Table 2. Comparative test data of the display screens obtained from the control group and the display screens prepared by the bonding method in Example 2.

[0115]

[0116] As shown in Table 2, compared with the control group, the annealing treatment of the display screen 10 in this application can effectively eliminate the internal stress generated by the curing shrinkage of the liquid optical adhesive 150, reduce the effect of the internal stress generated by the curing shrinkage of the liquid optical adhesive 150 on the solid optical adhesive 130, and thus reduce the possibility of bubble problems caused by the internal stress. In this way, the reliability of the prepared display screen can be improved, the appearance of the display screen can be improved, and the user experience can also be improved.

[0117] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0118] The above embodiments only express several implementation ways of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A method of attaching a display screen, characterized by, The application relates to a display screen bonding method. The application relates to a display screen bonding method. Before the step of bonding the optical film on the first substrate by means of the solid optical adhesive, the display screen bonding method further comprises the following step: selecting the solid optical adhesive with a preset intensity. After the step of bonding the second substrate on the side of the optical film away from the solid optical adhesive by means of the liquid optical adhesive and curing the liquid optical adhesive to obtain the display screen, the display screen bonding method further comprises the following step: annealing the display screen. The step of annealing the display screen comprises the following steps: heating the display screen from normal temperature to a preset annealing temperature; keeping the display screen at the preset annealing temperature for a first preset time; and cooling the display screen to normal temperature within a second preset time. The heating time is 10-30 minutes. The solid optical glue with the preset intensity is selected, specifically including: selecting the solid optical glue with a preset Young's modulus according to a curvature radius of a curved surface of the first substrate and / or the second substrate, and the preset Young's modulus is 3x10 5 Pa-4x10 5 Pa; The preset annealing temperature is 60-90 DEG C.

2. The method of claim 1, wherein, The first preset time is 1-4 hours.

3. The method of claim 1, wherein, The second preset time is 1-4 hours.

4. The method of claim 1, wherein, The step of bonding the optical film on the first substrate by means of the solid optical adhesive comprises the following steps:

5. The method of claim 1, wherein, The bonding environment is vacuumized, and the optical film is bonded on the first substrate by means of the solid optical adhesive.

6. The method of claim 1, wherein, After the step of bonding the second substrate on the side of the optical film away from the solid optical adhesive by means of the liquid optical adhesive and curing the liquid optical adhesive to obtain the display screen, the display screen bonding method further comprises the following step: deaerating the display screen. The display screen is prepared by the display screen bonding method.

7. The method of claim 1, wherein, The application relates to a display screen.

8. A display screen, characterized by ​ 9. A VR glasses, characterized in that, ​

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