CN111488066B

CN111488066B - Touch display device and laminating method thereof

Info

Publication number: CN111488066B
Application number: CN201910078496.7A
Authority: CN
Inventors: 张敏
Original assignee: Suzhou Canhong Photoelectric Co ltd
Current assignee: Suzhou Canhong Photoelectric Co ltd
Priority date: 2019-01-28
Filing date: 2019-01-28
Publication date: 2023-02-17
Anticipated expiration: 2039-01-28
Also published as: TWI711954B; CN111488066A; TW202028946A

Abstract

The invention provides a touch display device which comprises a touch panel, a display panel and a sealing structure. The glue sealing structure is arranged between the touch panel and the display panel and encloses a glue injection area, and the glue sealing structure comprises a plurality of first retaining walls and a plurality of second retaining walls. The plurality of first retaining walls are arranged on the periphery of the glue injection area and at least define a first edge and a second edge which are opposite to each other, and a third edge and a fourth edge which are opposite to each other, and the first edge, the third edge and the fourth edge are configured to form at least one notch respectively. The first retaining walls are formed by double-sided adhesive tapes, and the second retaining walls are arranged on the inner sides of the first retaining walls and define at least one diversion trench with the first retaining walls.

Description

Touch display device and laminating method thereof

Technical Field

The invention relates to a touch display device and a touch display device attaching method.

Background

In the conventional bonding method used in the touch display device, an optical adhesive is usually injected into the sealing structure of the display panel and the touch panel to bond the display panel and the touch panel. As shown in fig. 1, in the glue injection process of a conventional touch display device 100, a double-sided adhesive tape 102 is usually used to separate the display panel and the touch panel, and an outer wall 104 and an inner wall 106 are disposed on the inner side of the double-sided adhesive tape 102, so that a flow path is defined by the outer wall 104 and the inner wall 106 for glue injection. However, in a conventional design example, the width of the double-sided adhesive tape 102 may be 1.0mm, the total width of the outer retaining wall 104 and the inner retaining wall 106 may be 1.6mm, and the distance between the outer retaining wall 104 and the inner retaining wall 106 and the distance between the double-sided adhesive tape 102 and the outer retaining wall 104 are added, so that the overall area occupied by the adhesive tape structure is relatively large, which is difficult to be applied to the bonding operation of a touch display device with a narrow frame.

The background section is provided to aid in understanding the present disclosure, and thus the disclosure in the background section may include additional art that does not form the prior art that is known to those skilled in the art. The disclosure in the "background" section does not represent a representation of the disclosure or the problems that may be solved by one or more embodiments of the present invention, but is known or appreciated by those skilled in the art prior to the filing of the present application.

Disclosure of Invention

The invention provides a touch display device and a touch display device attaching method.

Other objects and advantages of the present invention will be further understood from the technical features disclosed in the present invention.

In order to achieve one or a part of or all of the above or other objects, an embodiment of the invention provides a touch display device, which includes a touch panel, a display panel and a sealant structure. The display panel is arranged on one side of the touch panel and forms a gap with the touch panel. The sealant structure is arranged in the gap and encloses a sealant injection area, and the sealant structure comprises a plurality of first retaining walls and a plurality of second retaining walls. The plurality of first retaining walls are arranged on the periphery of the glue injection area and at least define a first edge, a second edge, a third edge and a fourth edge which are opposite, and the first edge, the third edge and the fourth edge are configured to form at least one notch respectively. The first retaining walls are formed by double-faced adhesive tapes, the thickness of the first retaining walls is approximately the same as that of the gaps, and the second retaining walls are arranged on the inner sides of the first retaining walls and define at least one diversion trench with the first retaining walls.

Another embodiment of the invention provides a touch display device, which includes a touch panel, a display panel, at least one double-sided adhesive tape, and a display panel. The display panel is arranged on one side of the touch panel and forms a gap for accommodating the glue with the touch panel, and the double-sided adhesive tape is arranged in the gap, encloses a glue injection area, defines a glue injection port and at least two air outlets far away from the glue injection port. The diversion trench is arranged on the inner side of the double-sided adhesive tape to allow the glue to flow, and the diversion trench is communicated with the glue injection port and the air exhaust port.

Another embodiment of the invention provides a method for attaching a touch panel to a display panel. Firstly, at least one double-sided adhesive tape is used for connecting the touch panel and the display panel, the double-sided adhesive tape encloses a glue injection area between the touch panel and the display panel, and a glue injection port and at least two air outlets far away from the glue injection port are defined. Moreover, set up the guiding gutter of intercommunication injecting glue mouth and gas vent in the inboard of two-sided adhesive tape, pour into the injecting glue region with the colloid by the injecting glue mouth again.

Embodiments of the present invention have at least one of the following advantages. By the design of each embodiment, the double-sided adhesive tape is directly used for forming a part of the diversion trench and forming the glue injection opening and the air exhaust opening, so that the material cost can be reduced by omitting the outer retaining wall structure in the conventional design, and the overall occupied area of the glue sealing structure can be further reduced because the outer retaining wall and the space between the outer retaining wall and other elements do not need to be reserved, and the glue sealing structure is favorable for being applied to the laminating operation of a narrow-frame touch display device. Moreover, the structural design of one U-shaped double-sided adhesive tape and two L-shaped double-sided adhesive tapes is utilized, so that the arrangement of the glue injection port and the exhaust port is simpler. In addition, the design of the flow guide groove and the flow guide opening can reduce the flow resistance and guide the flow direction of the colloid which possibly overflows so as to avoid the overflow of the colloid.

Other objects and advantages of the present invention will be further understood from the technical features disclosed in the present invention. In order to make the aforementioned and other objects, features and advantages of the invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic diagram illustrating a conventional bonding method of a touch display device.

Fig. 2 is a schematic view of a touch display device according to an embodiment of the invention.

Fig. 3 is a schematic view of a molding structure according to an embodiment of the invention.

Fig. 4 is a flowchart of a touch display device attaching method according to an embodiment of the invention.

Detailed Description

The foregoing and other features, aspects and utilities of the present general inventive concept will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.

Fig. 2 is a schematic view of a touch display device according to an embodiment of the invention. Fig. 3 is a schematic view of a molding structure according to an embodiment of the invention. As shown in fig. 2, the touch display device 10 includes a display panel 20, a touch panel 30 and an encapsulation structure 40. The display panel 20 is disposed on one side of the touch panel 30 and forms a gap D with the touch panel 30, the sealant structure 40 is disposed in the gap D and encloses a glue injection region a, and the sealant structure 40 may include a first retaining wall 42 and a second retaining wall 44, the first retaining wall 42 may be disposed on a periphery of the glue injection region a, a thickness of the first retaining wall 42 may be substantially the same as a thickness of the gap D, and the second retaining wall 44 may be disposed on an inner side (a side facing a center of the touch display device) of the first retaining wall 42. The molding compound structure 40 can be disposed on a surface of the display panel 20 facing the touch panel 30, or a surface of the touch panel 30 facing the display panel 20, but is not limited thereto. In the present embodiment, the molding compound structure 40 may be disposed on a surface of a front frame 24 of the display panel 20, for example.

As shown in fig. 3, in the present embodiment, the plurality of first retaining walls 42 may include, for example, a U-shaped double-sided adhesive tape 421 and two L-shaped double-sided

adhesive tapes

422 and 423. The U-shaped double-sided adhesive tape 421 and the L-shaped double-sided

adhesive tapes

422 and 423 at least define a first side 40a and a second side 40b opposite to each other, and a third side 40c and a fourth side 40d opposite to each other. In this embodiment. One end of the U-shaped double-sided adhesive tape 421 and the L-shaped double-sided adhesive tape 422 form at least one notch 22a on the third side 40c, the other end of the U-shaped double-sided adhesive tape 421 and the L-shaped double-sided adhesive tape 423 form at least one notch 22b on the fourth side 40d, and at least one notch 22c is formed on the first side 40a between the double-sided adhesive tape 422 and the double-sided adhesive tape 423. In one embodiment, the notch 22c can be a glue injection opening GP, and the

notches

22a and 22b located on different sides and far away from the notch 22c can be used as the exhaust ports EP. The second retaining walls 44 and the double-sided

adhesive tapes

421, 422, 423 define at least one diversion groove 26 located inside the double-sided

adhesive tapes

421, 422, 423, and the notches formed by two adjacent second retaining walls 44 can be used as diversion openings 28. In the present embodiment, the guiding groove 26 may have a plurality of guiding openings 28 and communicate with the glue injection opening GP and each exhaust opening EP for the glue to flow, and each exhaust opening EP may be located between two guiding openings 28. The exhaust port EP can provide the effect of exhausting air during glue injection, and the redundant glue can be exhausted from the exhaust port EP. The glue injection port GP, the flow guide groove 26 including the plurality of flow guide ports 28, and the exhaust port EP may form a glue injection flow channel. For example, after being injected from the glue injection opening GP, the glue may be distributed in a scattered manner in the gap D between the display panel 20 and the touch panel 30 to bond the display panel 20 and the touch panel 30, a portion of the glue near the glue injection opening GP may flow into the flow guiding groove 26 from the flow guiding openings 28 at the upper right corner and the lower right corner and flow toward the exhaust port EP, and a portion of the glue farther from the glue injection opening GP may flow back into the flow guiding groove 26 from the flow guiding openings 28 at the upper left corner and the lower left corner and flow toward the exhaust port EP, so that the glue may bear a smaller flow resistance and be uniformly distributed in the glue structure 40.

In one embodiment, since the pressure at the position far away from the gate GP is relatively low, the vent EP may be disposed at a position closer to the second side 40b to facilitate air venting during the dispensing process, for example, the notch 22a (vent EP) of the third side 40c may be disposed within a range from the intersection of the third side 40c and the second side 40b to 1/3 of the side length of the third side 40c, and the notch 22b (vent EP) of the fourth side 40d may be disposed within a range from the intersection of the fourth side 40d and the second side 40b to 1/3 of the side length of the fourth side 40d.

In an embodiment, the second retaining wall may be made of a silica gel, and the colloid may be an optical colloid, but is not limited thereto. Moreover, the U-shaped and L-shaped double-sided adhesive tapes are only examples, and the double-sided adhesive tapes only need to define the glue injection port, the air exhaust port and the flow guide groove, and the number and the shape of the double-sided adhesive tapes can be changed according to actual needs without limitation.

In summary, the embodiments of the present invention have at least one of the following advantages, and the design of the above embodiments uses the double-sided adhesive tape to directly form a part of the guiding trench and form the glue injection opening and the air exhaust opening, so that the outer retaining wall structure of the conventional design can be omitted to reduce the material cost, and the space between the outer retaining wall and other elements does not need to be reserved, so that the area occupied by the whole glue sealing structure can be further reduced, and the application in the bonding operation of the narrow-frame touch display device is facilitated. Moreover, the structural design of one U-shaped double-sided adhesive tape and two L-shaped double-sided adhesive tapes is utilized, so that the arrangement of the glue injection port and the exhaust port is simpler. In addition, the design of the flow guide groove and the flow guide opening can reduce the flow resistance and guide the flow direction of the colloid which possibly overflows so as to avoid the overflow of the colloid.

Another embodiment of the invention provides a touch display device attaching method. As shown in fig. 4, in the bonding method, at least one double-sided adhesive tape is first used to connect the touch panel and the display panel and define a glue injection opening and at least two air outlets away from the glue injection opening (step S20), and the double-sided adhesive tape can enclose a glue injection area between the touch panel and the display panel. Then, a diversion trench communicating the glue injection port and the air outlet is formed in the inner side of the double-sided adhesive tape (step S30), and a glue is injected into the glue injection area surrounded by the double-sided adhesive tape through the glue injection port (step S40).

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, which is defined by the appended claims and the description of the invention, and all simple equivalent changes and modifications are intended to be covered by the present invention. It is not necessary for any embodiment or claim of the invention to address all of the objects, advantages, or features disclosed herein. Furthermore, the terms first, second, etc. used in the description and the claims are only used for naming components or distinguishing different embodiments or ranges, and are not used for limiting the upper limit or the lower limit of the number of components.

List of reference numerals

10. Touch control display device

20. Display panel

22a, 22b, 22c notch

24. Front frame

26. Diversion trench

28. Flow guide port

30. Touch panel

40. Glue sealing structure

40a first side

40b second side

40c third side

40d fourth side

42. First retaining wall

44. Second retaining wall

100. Touch control display device

102. Double-sided adhesive tape

104. External retaining wall

106. Inner retaining wall

421. 422,423 double-sided adhesive tape

D gap

A glue injection area

GP glue injection port

EP exhaust port

S10-S50 method steps

Claims

1. A touch display device comprises a touch panel, a display panel and a sealant structure,

the display panel is arranged on one side of the touch panel and forms a gap with the touch panel;

the sealant structure is arranged in the gap and encloses the glue injection area, and comprises a plurality of first retaining walls and a plurality of second retaining walls, wherein,

the plurality of first retaining walls are arranged at the periphery of the glue injection area and at least define a first edge, a second edge, a third edge and a fourth edge which are opposite, the first edge forms at least one glue injection port, the third edge and the fourth edge respectively form at least one air exhaust port, and each air exhaust port is adjacent to the second edge, wherein the plurality of first retaining walls are formed by double-faced glue, and the thickness of the plurality of first retaining walls is approximately the same as that of the gaps;

the plurality of second retaining walls are arranged on the inner sides of the plurality of first retaining walls and define at least one flow guide groove with the plurality of first retaining walls, the plurality of second retaining walls define at least one flow guide port, each flow guide port is communicated with the glue injection area and each flow guide groove, and each glue injection port and each air outlet are communicated with the flow guide groove.

2. The touch display device of claim 1, wherein the sealant structure is disposed on a surface of the display panel facing the touch panel or a surface of the touch panel facing the display panel, and the first retaining walls include a U-shaped double-sided adhesive tape and two L-shaped double-sided adhesive tapes.

3. The touch display device of claim 1, wherein the air outlet of the third side is located within 1/3 of the length of the third side from the intersection of the third side and the second side, and the air outlet of the fourth side is located within 1/3 of the length of the fourth side from the intersection of the fourth side and the second side.

4. The touch display device as claimed in claim 1, wherein the second barriers are made of silicone material.

5. The touch display device of claim 1, wherein the sealant structure is disposed on a surface of a front frame of the display panel.

6. A method for attaching a touch display device is used for attaching a touch panel and a display panel, and the method comprises the following steps:

connecting the touch panel and the display panel by using a plurality of double-sided adhesive tapes, wherein a glue injection area is defined between the touch panel and the display panel by the double-sided adhesive tapes, the double-sided adhesive tapes are arranged on the periphery of the glue injection area and at least define a first side and a second side which are opposite to each other and a third side and a fourth side which are opposite to each other, at least one glue injection port is formed on the first side, at least one exhaust port is formed on the third side and the fourth side respectively, and each exhaust port is adjacent to the second side;

arranging a plurality of optical adhesive tapes on the inner sides of the double-sided adhesive tapes and defining at least one flow guide groove with the double-sided adhesive tapes, wherein the flow guide groove is communicated with each glue injection port and each air outlet, the optical adhesive tapes define at least one flow guide port, and each flow guide port is communicated with the glue injection area and each flow guide groove; and

and injecting the colloid into the glue injection area through the glue injection port.