Touch display device, manufacturing method thereof, and electronic device

Abstract

The present application relates to a touch display device, a manufacturing method thereof, and an electronic device. The touch display device has a display area and a non-display area surrounding the display area. The touch display device includes a display module, a touch panel, and an adhesive unit stacked in a first direction, and the adhesive unit is bonded between the display module and the touch panel. The adhesive unit includes an adhesive layer and an adhesive retaining wall surrounding the adhesive layer, and the adhesive retaining wall is located in the non-display area. Wherein, the adhesive unit further includes a blocking structure located in the non-display area, and the blocking structure is disposed between the adhesive layer and the adhesive retaining wall to block bubbles flowing from the non-display area to the display area. In an environment such as high altitude and low pressure, the blocking structure can block the bubbles hidden under the adhesive retaining wall from flowing to the adhesive layer, thereby blocking the bubbles flowing from the non-display area to the display area, and reducing the risk that bubbles appear in the display area of the touch display device and affect the process yield.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a touch display device, a manufacturing method thereof, and an electronic device. Background Art

[0002] A touch display device often cooperates with a touch module and a display module to achieve the function of human-computer interaction. However, after the touch display device is transported, bubbles often appear in the display area, resulting in poor appearance of the touch display device. Summary of the Invention

[0003] Based on this, there is provided a touch display device, a manufacturing method thereof, and an electronic device that can reduce the risk of bubble appearance, so as to improve the process yield of the touch display device.

[0004] In one aspect of this application, there is provided a touch display device. The touch display device has a display area and a non-display area surrounding the display area. The touch display device includes:

[0005] A display module and a touch panel stacked in a first direction; and

[0006] An adhesive unit bonded between the display module and the touch panel; the adhesive unit includes an adhesive layer and an adhesive dam surrounding the adhesive layer; the adhesive dam is located in the non-display area;

[0007] Wherein, the adhesive unit further includes a blocking structure located in the non-display area; the blocking structure is disposed between the adhesive layer and the adhesive dam to block bubbles flowing from the non-display area to the display area.

[0008] In one embodiment, the projection of the blocking structure on a plane perpendicular to the first direction is defined as a first projection, and the projection of the adhesive dam on a plane perpendicular to the first direction is defined as a second projection;

[0009] The contours of the first projection and the second projection facing each other coincide.

[0010] In one embodiment, the projection of the blocking structure on a plane perpendicular to the first direction is defined as a first projection, and the projection of the adhesive layer on a plane perpendicular to the first direction is defined as a third projection;

[0011] The contours of the first projection and the third projection facing each other coincide.

[0012] In one embodiment, the blocking structure is configured to be sticky to be bonded between the display module and the touch panel.

[0013] In one embodiment, the material of the blocking structure is one of silicone, rubber, or acrylic glue.

[0014] In one embodiment, the material of the adhesive layer is optical glue.

[0015] On the other hand, the present application also provides a method for manufacturing a touch display device, the method comprising:

[0016] Forming an adhesive dam along the circumferential direction on the bonding surface of the display module;

[0017] Forming a blocking structure inside the adhesive dam; the blocking structure encloses to form a glue filling space;

[0018] Forming an adhesive layer in the glue filling space; the adhesive dam, the blocking structure and the adhesive layer together form an adhesive unit;

[0019] Bonding the touch panel to the bonding surface of the display module along the first direction by means of the adhesive unit to form a touch display device;

[0020] Wherein, the touch display device has a display area and a non-display area surrounding the display area, and the adhesive dam and the blocking structure are located in the non-display area.

[0021] In one embodiment, forming a blocking structure inside the adhesive dam specifically includes:

[0022] Forming a blocking structure inside the adhesive dam by a dispensing process.

[0023] In one embodiment, after forming a blocking structure inside the adhesive dam by a dispensing process, the method further includes the steps of:

[0024] Curing the adhesive dam and the blocking structure by a pressure maintaining and curing process.

[0025] In one embodiment, forming an adhesive layer in the glue filling space specifically includes:

[0026] Forming an adhesive layer in the glue filling space by a glue filling process.

[0027] On yet another aspect, the present application also provides an electronic device, including the above-mentioned touch display device.

[0028] For the above-mentioned touch display device, its manufacturing method and electronic device, the touch display device at least includes a display module, a touch panel and an adhesive unit. The blocking structure in the adhesive unit is arranged between the adhesive dam and the adhesive layer, and in an environment such as high altitude and low pressure, it can block the bubbles hidden under the adhesive dam from flowing to the adhesive layer, thereby blocking the bubbles flowing from the non-display area to the display area, and reducing the risk that bubbles appear in the display area of the touch display device and affect the process yield. Description of the Drawings

[0029] Figure 1 Schematic diagram of a touch display device in an embodiment of the related art;

[0030] Figure 2 Schematic diagram of an adhesive unit in an embodiment of the related art;

[0031] Figure 3 Schematic diagram of a bubble in an embodiment of the related art;

[0032] Figure 4 Partial schematic diagram of a touch display device in an embodiment of the related art;

[0033] Figure 5 Partial enlarged schematic diagram of a touch display device in an embodiment of the related art;

[0034] Figure 6 For Figure 5 Enlarged schematic diagram at position m in;

[0035] Figure 7 Schematic diagram of an adhesive unit in another embodiment of the related art;

[0036] Figure 8 Cross-sectional schematic diagram of an adhesive unit in another embodiment of the related art;

[0037] Figure 9 Schematic diagram of a double-sided adhesive in another embodiment of the related art;

[0038] Figure 10 Schematic diagram of a touch display device in an embodiment of the present application;

[0039] Figure 11 Schematic diagram of a blocking structure in an embodiment of the present application;

[0040] Figure 12 Schematic diagram of a first projection, a second projection, and a third projection in an embodiment of the present application;

[0041] Figure 13 Schematic diagram of the test process of a touch display device in an embodiment of the present application;

[0042] Figure 14 Schematic flow diagram of the manufacturing method of a touch display device in an embodiment of the present application.

[0043] Brief description of component symbols:

[0044] 10, 100: Touch display device 11, 110: Display module

[0045] 111, 1101: Rear iron frame 112, 1102: Backlight module

[0046] 113, 1103: Lower polarizer 114, 1104: Liquid crystal panel

[0047] 115, 1105: Glass substrate 116, 1106: Upper polarizer

[0048] 117, 1107: Front iron frame 118, 1108: Buffer foam

[0049] 12, 120: Touch panel 121, 1201: Touch module

[0050] 122, 1202: Cover plate 122a, 1202a: Visible area

[0051] 122b, 1202b: Ink area 13, 130: Adhesive unit

[0052] 131, 1301: Adhesive layer 132, 1302: Adhesive retaining wall

[0053] 133: Double-sided tape 134: Silicone rubber

[0054] 1303: Stopping structure a, A: Display area

[0055] b, B: Non-display area z, Z: Glue filling space

[0056] x, X: First direction q: Bubble

[0057] P1: First projection P2: Second projection

[0058] P3: Third projection Detailed implementation manners

[0059] To make the above objects, features, and advantages of the present application more apparent and understandable, the following will describe the detailed implementation manners of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand 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 connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0060] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0062] In the present application, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0063] In the present application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0064] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0065] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the components are only drawn by way of example in the drawings and not necessarily to the true scale.

[0066] To facilitate understanding of the technical solution of the present application, before elaborating in detail, the touch display device 10 in the related art will be described first.

[0067] Figure 1The figure shows a schematic diagram of a touch display device 10 in an embodiment of the related art. Figure 2 The figure shows a schematic diagram of an adhesive unit 13 in an embodiment of the related art.

[0068] Combined with Figure 1 and Figure 2 As shown, in some embodiments of the related art, the touch display device 10 has a display area a and a non-display area b surrounding the display area a. The touch display device 10 includes a display module 11 and a touch panel 12 stacked along a first direction x. The touch display device 10 further includes an adhesive unit 13 bonded between the display module 11 and the touch panel 12. The adhesive unit 13 includes an adhesive layer 131 and an adhesive dam 132 surrounding the adhesive layer 131, and the adhesive dam 132 is located in the non-display area b.

[0069] Specifically, in some embodiments, the touch panel 12 includes a touch module 121 and a cover plate 122 stacked along the first direction x. The cover plate 122 has a visible area 122a and an ink area 122b surrounding the visible area 122a. By means of the visible area 122a and the ink area 122b on the touch panel 12, the touch display device 10 is defined with a display area a and a non-display area b surrounding the display area a. The display module 11 includes a rear iron frame 111, a backlight module 112, a lower polarizer 113, a liquid crystal panel 114, a glass substrate 115, an upper polarizer 116, and a front iron frame 117 stacked along the first direction x. The adhesive layer 131 is bonded between the front iron frame 117, the upper polarizer 116, and the touch module 121. The adhesive dam 132 surrounding the adhesive layer 131 is bonded between the touch module 121 and the front iron frame 117 to achieve the bonding between the touch panel 12 and the display module 11. Further, the touch display device 10 further includes a buffer foam 118 disposed between the glass substrate 115 and the front iron frame 117 to buffer and shock-absorb external forces.

[0070] Exemplarily, the material of the adhesive layer 131 is optical glue, and the material of the adhesive dam 132 is VHB (Very High Bonding) glue. Combined with Figure 1 As shown, the adhesive dam 132 and the front iron frame 117 in the related art jointly form a potting space z by damming, and then the optical glue is poured into the potting space z and cured to form the adhesive layer 131.

[0071] Figure 3 The figure shows a schematic diagram of a bubble q in an embodiment of the related art; Figure 4 The figure shows a partial schematic diagram of the touch display device 10 in an embodiment of the related art.

[0072] As Figure 3As shown, the inventors of the present application noticed that after transporting the touch display device 10 with no apparent defects in appearance, bubbles q often appear in the display area a of the touch display device 10. Since the VHB glue located in the non-display area b is bonded to the front iron frame 117 of the display module 11, and the ink area 122b of the touch panel 12 covers the VHB glue, it is difficult to directly observe the bubbles q. To find out the source of the bubbles q, as Figure 4 shown, the inventors replaced the cover plate 122 with the ink area 122b with a transparent glass plate, and pressed the transparent glass plate on the display module 11 to conduct tests under test conditions simulating the actual transportation environment. Specifically, it was simulated in an environment of 500 hPa at an altitude of 5500 meters (18000 feet), maintained at 0 degrees for 12 hours and at 40 degrees for 12 hours.

[0073] Figure 5 FIG. shows a partially enlarged schematic view of the touch display device 10 in an embodiment of the related art; Figure 6 shows Figure 5 the enlarged schematic view at m in

[0074] Combined with Figure 5 and Figure 6 shown, after the test, the inventors observed that the bubbles q originated from the edge of the VHB glue. The relatively soft VHB glue is also difficult to operate during bonding, is relatively easy to stretch after bonding, and the cohesive density of the material itself is relatively low. Therefore, when the VHB glue is bonded, due to various factors, such as the limitations of the operating personnel and the cutting process, and also due to the influence of the material itself, such as the length and width of the material design, it is difficult to ensure that there are no fine wrinkles and gaps during bonding, and it is also difficult to ensure that there are no hidden bubbles q in the VHB glue material itself. In addition, when the VHB glue is bonded, whether its back glue is in contact with metal or glass, it is a joint between solid materials, and it is difficult to ensure complete fusion and infiltration, so there must be gaps. In a high-altitude and low-pressure environment, the bubbles q in the gaps expand and flow, and the direction of flow is difficult to control. When the bubbles q flow to the display area a, it causes defects in appearance. Moreover, even if the process of pressurized degassing is increased, there are still bubbles q that cannot be observed by the naked eye, resulting in the risk of bubbles q appearing in the display area a after transportation.

[0075] Figure 7 FIG. shows a schematic view of the bonding unit 13 in another embodiment of the related art; Figure 8 FIG. shows a cross-sectional schematic view of the bonding unit 13 in another embodiment of the related art; Figure 9 FIG. shows a schematic view of the double-sided tape 133 in another embodiment of the related art.

[0076] Combined with Figure 7 and Figure 8As shown, the inventor has tried to add silicone rubber 134 (i.e., Silicone Rubber) with a high material density between two double-sided adhesives 133 (i.e., DSA, Double-sided adhesive). The double-sided adhesives 133, silicone rubber 134, and double-sided adhesives 133 arranged in layers together form an adhesive unit 13. However, after multiple tests under the foregoing test conditions, the inventor found that air bubbles q still appear in the display area a. Through research, it is found that as Figure 9 shown, due to the long length of the double-sided adhesive 133 and the hardness of the silicone rubber 134, when the adhesive unit 13 with this structure is attached to the front iron frame 117 made of metal material, it is very easy to wrinkle, resulting in the problem of hidden bubbles still occurring.

[0077] Based on this, through in-depth research, the inventor of the present application improved the structure of the adhesive unit in the touch display device, and blocked air bubbles from the inside of the adhesive retaining wall, thereby improving the problem of air bubbles appearing in the display area of the touch display device after transportation.

[0078] For ease of description, the drawings only show the structures related to the embodiments of the present application.

[0079] Figure 10 shows a schematic diagram of a touch display device 100 in an embodiment of the present application, Figure 11 shows a schematic diagram of a stop structure 1303 in an embodiment of the present application.

[0080] Referring to Figure 10 and combining with Figure 11 , a touch display device 100 provided in an embodiment of the present application. The touch display device 100 has a display area A and a non-display area B surrounding the display area A. The touch display device 100 includes a display module 110 and a touch panel 120 arranged in layers along the first direction X. The touch display device 100 further includes an adhesive unit 130 bonded between the display module 110 and the touch panel 120. The adhesive unit 130 includes an adhesive layer 1301 and an adhesive retaining wall 1302 surrounding the adhesive layer 1301. The adhesive retaining wall 1302 is located in the non-display area B. Among them, the adhesive unit 130 further includes a stop structure 1303 located in the non-display area B. The stop structure 1303 is provided between the adhesive layer 1301 and the adhesive retaining wall 1302 to stop air bubbles flowing from the non-display area B to the display area A.

[0081] In the embodiment of the present application, the touch display device 100 provided at least includes a display module 110, a touch panel 120, and an adhesive unit 130. The stop structure 1303 in the adhesive unit 130 is disposed between the adhesive retaining wall 1302 and the adhesive layer 1301. In an environment such as high altitude and low pressure, it can block the bubbles hidden under the adhesive retaining wall 1302 from flowing to the adhesive layer 1301, thereby blocking the bubbles flowing from the non-display area B to the display area A, and reducing the risk that bubbles appear in the display area A of the touch display device 100 and affect the process yield.

[0082] It should be noted that the touch panel 120 includes a touch module 1201 and a cover plate 1202 stacked along the first direction X. The cover plate 1202 has a visible area 1202a and an ink area 1202b surrounding the visible area 1202a. With the visible area 1202a and the ink area 1202b on the touch panel 120, the touch display device 100 is defined with a display area A and a non-display area B surrounding the display area A.

[0083] Figure 12 The schematic diagram of the first projection P1, the second projection P2, and the third projection P3 in an embodiment of the present application is shown.

[0084] As Figure 12 shown, and in combination with Figure 10 , in some embodiments, the projection of the stop structure 1303 on a plane perpendicular to the first direction X is defined as the first projection P1, and the projection of the adhesive retaining wall 1302 on a plane perpendicular to the first direction X is defined as the second projection P2. The profiles of the first projection P1 and the second projection P2 facing each other coincide. It can be understood that that is, the edges of the adhesive retaining wall 1302 and the stop structure 1303 facing each other are in contact without a gap. In this way, the stop of the stop structure 1303 for the bubbles is more direct, and the risk of hiding more bubbles due to the existence of a gap can be reduced. Moreover, in combination with some embodiments described later, during coating, the coating position of the stop structure 1303 can be positioned by means of the adhesive retaining wall 1302, and the coating direction can be guided.

[0085] Please continue to combine Figure 10 and Figure 12 shown, in some embodiments, the projection of the stop structure 1303 on a plane perpendicular to the first direction X is defined as the first projection P1, and the projection of the adhesive layer 1301 on a plane perpendicular to the first direction X is defined as the third projection P3. The profiles of the first projection P1 and the third projection P3 facing each other coincide. It can be understood that that is, the edges of the adhesive layer 1301 and the stop structure 1303 facing each other are in contact without a gap. In this way, the risk of hiding more bubbles due to the existence of a gap can be reduced.

[0086] As Figure 10As shown, in some embodiments, the stopping structure 1303 is configured to be sticky so as to adhere between the display module 110 and the touch panel 120. Since the stopping structure 1303 is disposed between the adhesive retaining wall 1302 and the adhesive layer 1301, and the adhesive retaining wall 1302 is disposed around the adhesive layer 1301, it can be understood that the stopping structure 1303 is also disposed around the adhesive layer 1301, that is, it is formed at the edge portion of the touch display device 100. By virtue of the adhesive force of the stopping structure 1303, it can serve as a reinforcing structure, making the adhesion between the display module 110 and the touch panel 120 more stable and improving the interlayer separation phenomenon caused by insufficient edge strength.

[0087] Please continue to refer to Figure 10 , in some embodiments, the material of the stopping structure 1303 is one of silicone, rubber or acrylic glue. When silicone, rubber or acrylic glue is coated on the inner side of the adhesive retaining wall 1302 in a fluid state, the gap that may exist between it and the adhesive retaining wall 1302 can be minimized. Moreover, the materials of silicone, rubber or acrylic glue are softer, and the fitting effect with the fitting surface of the display module 110 is better, improving the bubble stopping effect. In some other embodiments, the material of the stopping structure 1303 can also be two-component mixed curing glue (AB glue), polyurethane glue (PU glue), sealing tape or other materials, as long as it can stop the bubbles flowing from the display area A to the non-display area B, which is not limited herein.

[0088] Refer to Figure 10 , in some embodiments, the material of the adhesive layer 1301 is optical glue. The optical glue (Optically Clear Adhesive, OCR) has characteristics such as high transmittance and low reflection, and it has better optical effects. With the adhesive layer 1301 made of optical glue, the display effect of the display area A is better, thereby improving the display effect of the touch display device 100. At the same time, compared with the adhesive retaining wall 1302 and the stopping structure 1303, the adhesive layer 1301 made of optical glue has a lower adhesive strength. By virtue of the adhesive retaining wall 1302 and the stopping structure 1303, the adhesive strength of the adhesive unit 130 can be improved, making the adhesion between the touch panel 120 and the display module 110 more stable.

[0089] Refer to Figure 10 , in some embodiments, the material of the adhesive retaining wall 1302 is VHB (Very High Bonding) glue. The VHB glue has strong adhesive force and good cohesive strength, that is, it has the ability to resist external forces and maintain itself without being damaged. Of course, in some other embodiments, it can also be a double-sided glue such as polyurethane glue (PU glue) or silicone rubber with relatively close cohesive force, which is not limited herein.

[0090] Combined with some of the foregoing embodiments, such as Figure 10 shown, the display module 110 further includes a rear iron frame 1101, a backlight module 1102, a lower polarizer 1103, a liquid crystal panel 1104, a glass substrate 1105, an upper polarizer 1106, and a front iron frame 1107 that are stacked in the first direction X. The adhesive layer 1301 is bonded between the front iron frame 1107, the upper polarizer 1106, and the touch control module 1201. The adhesive retaining wall 1302 and the retaining structure 1303 surrounding the outside of the adhesive layer 1301 are both bonded between the touch control module 1201 and the front iron frame 1107 to achieve the bonding between the touch panel 120 and the display module 110. Further, the touch display device 100 further includes a buffer foam 1108 disposed between the glass substrate 1105 and the front iron frame 1107 to buffer and dampen external forces.

[0091] Figure 13 The figure shows a schematic diagram of the test process of the touch display device 100 in an embodiment of the present application.

[0092] As Figure 13 shown, and combined with Figure 10 , combined with some of the foregoing embodiments, the inventor replaced the cover plate 1202 having the ink area 1202b with a transparent glass plate, and by pressing the transparent glass plate on the display module 110, the test was carried out under the test conditions simulating the actual transportation environment. Specifically, in an environment of 500 hPa at an altitude of 5500 meters (18000 feet), it was maintained at 0 degrees for 12 hours and at 40 degrees for 12 hours. After multiple tests, it was found that no bubbles appeared at the inner side of the retaining structure 1303, that is, at the edge adjacent to the adhesive layer 1301. It can be seen therefrom that no bubbles will appear in the display area A of the touch display device 100 provided by the embodiment of the present application, improving the defect that bubbles appear after the touch display device 100 is transported, resulting in poor appearance.

[0093] Figure 14 The figure shows a schematic diagram of the process of the manufacturing method of the touch display device 100 in an embodiment of the present application.

[0094] Based on the same inventive concept, as Figure 14 shown, and combined with Figure 10 and Figure 11 , on the other hand, the present application further provides a manufacturing method of a touch display device 100, the method including:

[0095] S110. Form an adhesive retaining wall 1302 along the circumference on the bonding surface of the display module 110;

[0096] S120. Form a retaining structure 1303 inside the adhesive retaining wall 1302; the retaining structure 1303 encloses to form a glue filling space Z;

[0097] S130. Form an adhesive layer 1301 within the potting space Z; the adhesive retaining wall 1302, the retaining structure 1303, and the adhesive layer 1301 together form an adhesive unit 130.

[0098] S140. By means of the adhesive unit 130, bond the touch panel 120 to the bonding surface of the display module 110 along the first direction X to form a touch display device 100.

[0099] Among them, the touch display device 100 has a display area A and a non-display area B surrounding the display area A, and the adhesive retaining wall 1302 and the retaining structure 1303 are located in the non-display area B.

[0100] In step S110, in combination with some of the foregoing embodiments, the bonding surface of the display module 110 refers to the surface on one side of the display module 110 for bonding with the touch panel 120. Specifically, the bonding surface of the display module 110 is jointly formed by the front iron frame 1107, the upper polarizer 1106, and a partial surface of the glass substrate 1105. The adhesiveretaining wall 1302 formed along the circumferential direction is also to use the adhesive retaining wall 1302 to build a dam for subsequent formation of the retaining structure 1303 and the adhesive layer 1301.

[0101] In step S120, the inner side of the adhesive retaining wall 1302 is the side of the adhesive retaining wall 1302 closer to the display area A. The retaining structure 1303 formed along the inner side of the adhesive retaining wall 1302 can enclose the potting space Z, thus facilitating the subsequent formation of the adhesive layer 1301.

[0102] In step S130, during the process of forming the adhesive layer 1301 within the potting space Z by means of the blocking of the retaining structure 1303 and the adhesive retaining wall 1302, situations such as possible glue overflow can be alleviated. By means of the cooperative action of the adhesive retaining wall 1302, the retaining structure 1303, and the adhesive layer 1301, an adhesive unit 130 capable of bonding the touch panel 120 and the display module 110 is formed.

[0103] In step S140, the first direction X is perpendicular to the bonding surface.

[0104] Combined with Figure 10 and Figure 14As shown in the figure, in the manufacturing method of the touch display device 100 provided by the embodiments of the present application, the bonding unit 130 formed by bonding the retaining wall 1302, the blocking structure 1303 and the bonding layer 1301 can reliably bond the touch panel 120 and the display module 110. Among them, the blocking structure 1303 in the bonding unit 130 is arranged between the bonding retaining wall 1302 and the bonding layer 1301. In an environment such as high altitude and low pressure, it can block the bubbles hidden under the bonding retaining wall 1302 from flowing to the bonding layer 1301, thereby blocking the bubbles flowing from the non-display area B to the display area A, and reducing the risk that bubbles appear in the display area A of the touch display device 100 and affect the process yield.

[0105] It should be noted that, in combination with some of the foregoing embodiments, to ensure the bonding strength of the bonding retaining wall 1302 and the blocking structure 1303, when selecting materials, the optical effects of the bonding retaining wall 1302 and the blocking structure 1303 are relatively poor, while the bonding layer 1301 made of optical glue has better optical effects. The bonding retaining wall 1302 and the blocking structure 1303 are located in the non-display area B, that is, it is ensured that the part for bonding the touch panel 120 and the display module 110 in the display area A is the bonding layer 1301, which improves the display effect of the touch display device 100.

[0106] Combined with Figure 10 、 Figure 11 and Figure 14 As shown in the figure, in some embodiments, step S120 specifically includes forming the blocking structure 1303 on the inner side of the bonding retaining wall 1302 through a dispensing process. The dispensing process can evenly and accurately cover the inner side of the bonding retaining wall 1302 with glue. The dispensing process can better control the amount of glue dispensed, resulting in a better bonding effect and a simple process.

[0107] Further, after forming the blocking structure 1303 on the inner side of the bonding retaining wall 1302 through the dispensing process, the method further includes the step of curing the bonding retaining wall 1302 and the blocking structure 1303 through a pressure maintaining and curing process. The pressure maintaining and curing process means that during the curing process of the bonding retaining wall 1302 and the blocking structure 1303, a certain pressure is applied to them and maintained for a certain period of time. The pressure maintaining and curing process can evenly disperse and spread the glue, so that the curing effect of the glue is better, and it can also improve the adhesive force of the glue. In the present application, through one process, the pressure maintaining action of the bonding retaining wall 1302 and the blocking structure 1303 is completed at the same time, and there is no need for secondary pressure maintaining for the blocking structure 1303, which can effectively save the process and improve the efficiency.

[0108] Combined with Figure 10 、 Figure 11 and Figure 14As shown, in some embodiments, step S130 specifically includes forming an adhesive layer 1301 in the potting space Z through a potting process. Combining with the foregoing some embodiments, the potting process refers to pouring a liquid optical adhesive into the potting space Z and then curing it to achieve the bonding between the touch panel 120 and the display module 110.

[0109] Based on the same inventive concept, on the other hand, the present application further provides an electronic device including the above-mentioned touch display device 100. Thus, by using the touch display device 100 in the foregoing some embodiments, the risk of bubbles appearing in the display area A can be reduced, the process yield of the electronic device can be improved, and the display effect of the electronic device can also be enhanced.

[0110] The above-mentioned electronic device can be applied to fields such as mobile phone terminals, bionic electronics, electronic skin, wearable devices, vehicle-mounted devices, Internet of Things devices, and artificial intelligence devices. For example, the above-mentioned electronic device can be a mobile phone terminal, a tablet, a palm computer, an ipod, a smart watch, a laptop computer, a television, a monitor, etc.

[0111] Combined with Figures 10 to 14 As shown, the touch display device 100 provided by the embodiments of the present application at least includes a display module 110, a touch panel 120, and an adhesive unit 130. The blocking structure 1303 in the adhesive unit 130 is disposed between the adhesive retaining wall 1302 and the adhesive layer 1301. In an environment such as high altitude and low pressure, it can block the bubbles hidden under the adhesive retaining wall 1302 from flowing to the adhesive layer 1301, thereby blocking the bubbles flowing from the non-display area B to the display area A, and reducing the risk that bubbles appear in the display area A of the touch display device 100 and affect the process yield. Moreover, by virtue of the adhesive force of the blocking structure 1303, it can serve as a reinforcing structure, making the bonding between the display module 110 and the touch panel 120 more reliable and improving the interlayer separation phenomenon caused by insufficient edge strength. The manufacturing method of the touch display device 100 can reliably bond the touch panel 120 and the display module 110. By forming the blocking structure 1303 through a dispensing process, not only can the amount of glue be better controlled, but the process is also simple. In addition, through one process, the pressure maintaining actions of both the adhesive retaining wall 1302 and the blocking structure 1303 can be completed simultaneously, without secondary pressure maintaining for the blocking structure 1303, effectively saving the process and improving the manufacturing efficiency. For the electronic device applying the touch display device 100 provided by the present application, the risk of bubbles appearing on the appearance is greatly reduced, and the yield is improved.

[0112] It should be noted that some of the above-described technical solutions can be implemented as independent embodiments during actual implementation, or can be combined with each other and implemented as a combined embodiment. Some of the above-described technical solutions are exemplary solutions. Specifically, how to combine them for implementation can be selected according to actual needs, and the embodiments of the present application do not make specific restrictions. In addition, when elaborating on the content of the above embodiments of the present application, only based on the idea of convenient elaboration, different embodiments are elaborated in the corresponding order, such as the order preset according to the requirements in the actual implementation process, rather than limiting the execution order between different embodiments. Correspondingly, during actual implementation, if it is necessary to implement multiple embodiments provided by the embodiments of the present application, it is not necessarily required to follow the execution order provided when the embodiments of the present invention are elaborated, but the execution order between different embodiments can be arranged according to requirements.

[0113] It should be understood that although Figure 14 each step in the flowchart of Figure 14 is shown sequentially according to the indication of the arrow, these steps are not necessarily executed in the order indicated by the arrow. Unless there is a clear description in this article, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover,

[0114] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as the combination of these technical features does not conflict, it should be considered as the scope described in this specification.

[0115] The above-described embodiments only represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A touch display device, characterized in that, the touch display device has a display area and a non-display area surrounding the display area; the touch display device includes: a display module and a touch panel stacked in a first direction; and an adhesive unit bonded between the display module and the touch panel; the adhesive unit includes an adhesive layer and an adhesive retaining wall surrounding the adhesive layer; the adhesive retaining wall is located in the non-display area; wherein, the adhesive unit further includes a blocking structure located in the non-display area; the blocking structure is disposed between the adhesive layer and the adhesive retaining wall to block air bubbles flowing from the non-display area to the display area; the blocking structure is formed by a coating method and is bonded between the display module and the touch panel.

2. The touch display device according to claim 1, characterized in that, defining a first projection of the blocking structure on a plane perpendicular to the first direction, and a second projection of the adhesive retaining wall on a plane perpendicular to the first direction; the contours of the first projection and the second projection facing each other coincide.

3. The touch display device according to claim 2, characterized in that, defining a first projection of the blocking structure on a plane perpendicular to the first direction, and a third projection of the adhesive layer on a plane perpendicular to the first direction; the contours of the first projection and the third projection facing each other coincide.

4. The touch display device according to any one of claims 1-3, characterized in that, the blocking structure is configured to have adhesiveness to be bonded between the display module and the touch panel.

5. The touch display device according to claim 4, characterized in that, the material of the blocking structure is one of silicone, rubber or acrylic adhesive.

6. The touch display device according to any one of claims 1-3, characterized in that, the material of the adhesive layer is an optical adhesive.

7. A manufacturing method of a touch display device, characterized in that, the method includes: forming an adhesive retaining wall circumferentially on the bonding surface of the display module; forming a blocking structure inside the adhesive retaining wall by a coating process; the blocking structure encloses a glue filling space; forming an adhesive layer in the glue filling space; the adhesive retaining wall, the blocking structure and the adhesive layer together form an adhesive unit; bonding the touch panel to the bonding surface of the display module in the first direction by means of the adhesive unit to form a touch display device; wherein, the touch display device has a display area and a non-display area surrounding the display area, the adhesive retaining wall and the blocking structure are located in the non-display area, and the blocking structure is bonded between the display module and the touch panel.

8. The manufacturing method of the touch display device according to claim 7, characterized in that, the forming of the blocking structure inside the adhesive retaining wall specifically includes: forming the blocking structure inside the adhesive retaining wall by a dispensing process.

9. The manufacturing method of the touch display device according to claim 8, characterized in that, After forming the stopping structure on the inner side of the adhesive retaining wall through the dispensing process, the method further includes the step of: Curing the adhesive retaining wall and the stopping structure through a pressure holding and curing process.

10. The method for manufacturing a touch display device according to claim 7, wherein, The forming of the adhesive layer in the potting space specifically includes: Forming the adhesive layer in the potting space through a potting process.

11. An electronic device, wherein, comprising the touch display device according to any one of claims 1-6.

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