Intelligent Interactive Touch Panel Based on Glueless Lamination

Abstract

The present invention discloses an intelligent interactive touch tablet based on adhesive-free lamination, comprising: a back plate, a plastic middle frame, an aluminum profile front frame, an optical film, a liquid crystal display screen, and a glass cover plate. The plastic middle frame is arranged at the side edge of the back plate. The plastic middle frame has a boss, a card slot is formed between the boss and the plate surface of the back plate, and an installation surface is formed on the plate surface of the boss away from the back plate. The edge of the optical film abuts against the installation surface; the liquid crystal display screen is laminated on the optical film, and the glass cover plate is laminated on the liquid crystal display screen; the aluminum profile front frame is snap-connected to the glass cover plate and connected to the back plate through fasteners. For the intelligent interactive touch tablet based on adhesive-free lamination of the present invention, by adjusting the position of the optical film, the optical film and the liquid crystal display screen are laminated together, and are supported by a buffer member with optimized structure. At the same time, the heat dissipation problem is solved, and the phenomenon of poor image quality caused by the depression of the liquid crystal display screen due to force is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent interactive touch panel assembly, and in particular to an intelligent interactive touch panel based on glue-free bonding. Background Art

[0002] The existing intelligent interactive touch tablets, smart screens, smart blackboards, infrared touch screens, capacitive touch screens, capacitive touch screens, electromagnetic touch screens and other multimedia interactive intelligent display terminals mainly use liquid optical adhesive (LOCA & OCA) and water glue bonding process. When bonding medium and large-sized TFT-LCD liquid crystal display screens, the optical film (diffuser plate, diffusion film, brightness enhancement film or DOP / DOPP) is on one side of the plastic middle frame, and the TFT-LCD liquid crystal display screen is on the other side of the plastic middle frame. The TFT-LCD liquid crystal display screen and the glass cover plate with or without touch are completely glued together in a seamless manner to provide a better display effect.

[0003] The existing glue dispensing and bonding process is complex and requires very high precision of the environment and equipment. When the glass cover plate applies pressure to the liquid optical glue, the TFT-LCD liquid crystal display screen inside the glass cover plate will also be affected by the pressure and the gravity of the liquid optical glue and water glue, causing the TFT-LCD liquid crystal glass to sink. Therefore, after bonding, a very obvious uneven bonding thickness will be formed. The thickness of the bonding middle part is particularly large, while the bonding thickness of the edge is particularly small, which can easily lead to uneven force on the TFT-LCD liquid crystal display screen, which will result in a large amount of process glue, high cost, poor flatness, and easy to produce Muar (referring to the uneven brightness of the display, causing various marks). A TFT-LCD liquid crystal display screen with a large curvature will produce uneven brightness on a pure color screen, affecting the user experience. Too little pressure can easily lead to the glue not being able to flow all over the bonding surface after bonding. Uneven glue thickness can easily lead to yellowing, and bubbles and debonding can easily occur in weak glue areas. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an intelligent interactive touch panel based on glue-free bonding to prevent a liquid crystal display screen from being depressed by force and causing poor image quality.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] An intelligent interactive touch panel based on glue-free bonding, comprising: a back panel, a plastic middle frame, an aluminum profile front frame, an optical film, a liquid crystal display screen, and a glass cover plate;

[0007] The plastic middle frame is disposed at the side edge of the back plate. The plastic middle frame has a boss, a clamping groove is formed between the boss and the plate surface of the back plate, and an installation surface is formed on the side of the boss away from the plate surface of the back plate;

[0008] The edge of the optical film is abutted against the installation surface;

[0009] The liquid crystal display screen is attached to the optical film, and the glass cover plate is attached to the liquid crystal display screen;

[0010] The aluminum profile front frame is snap-connected to the glass cover plate and connected to the back plate through fasteners.

[0011] In one embodiment,

[0012] A filling cavity is formed between the optical film and the back plate;

[0013] The intelligent interactive touch panel based on adhesive-free bonding further includes a buffer member disposed in the filling cavity.

[0014] In one embodiment,

[0015] The buffer member is bent to form a wavy structure, and two ends of the buffer member are respectively snap-connected to the clamping grooves on both sides;

[0016] The buffer member has a plurality of front abutting portions abutting against the optical film, and the buffer member has a plurality of rear abutting portions abutting against the back plate. An elastic abutment is formed between the optical film and the back plate through the buffer member;

[0017] The distances between adjacent two of the front abutting portions are equal;

[0018] A heat dissipation space is formed between the wavy structure of the buffer member and the optical film.

[0019] In one embodiment, the buffer member is a plastic part formed by one-piece injection molding.

[0020] In one embodiment, the buffer member is a metal part formed by one-piece bending.

[0021] In one embodiment, the optical film includes a diffusion plate, a diffusion film, and a DOP composite film attached in sequence; wherein, the edge of the diffusion plate is abutted against the installation surface, and the DOP composite film is attached to the liquid crystal display screen.

[0022] An intelligent interactive touch tablet based on adhesive - free lamination of the present invention adjusts the position of an optical film, so that the optical film is laminated with a liquid crystal display screen together, and is supported by a buffer member with optimized structure. Meanwhile, the heat dissipation problem is solved, and the phenomenon of poor image quality caused by the depression of the liquid crystal display screen due to force is prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0024] Figure 1 is a schematic structural diagram of an intelligent interactive touch tablet of the prior art;

[0025] Figure 2 is Figure 1 a partial view of the intelligent interactive touch tablet shown;

[0026] Figure 3 is a front view of an intelligent interactive touch tablet based on adhesive - free lamination according to an embodiment of the present invention;

[0027] Figure 4 is Figure 3 a rear view of the intelligent interactive touch tablet based on adhesive - free lamination shown;

[0028] Figure 5 is Figure 4 a sectional view along line A - A;

[0029] Figure 6 is Figure 5 a schematic diagram after removing the buffer member;

[0030] Figure 7 is Figure 5 a partial view of... DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0032] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there can 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", "left", "right" and similar expressions used in this article are only for illustrative purposes and do not represent the only implementation.

[0033] Unless otherwise defined, all technical and scientific terms used in this article have the same meaning as those commonly understood by those skilled in the technical field to which this invention belongs. The terms used in the description of this invention in this article are only for the purpose of describing specific implementations and are not intended to limit this invention. The term "and / or" used in this article includes any and all combinations of one or more of the related listed items.

[0034] As Figure 1 and Figure 2 shown, it is a schematic structural diagram of an intelligent interactive touch tablet 10 of the prior art. The intelligent interactive touch tablet 10 includes: a backplane 11, a plastic middle frame 12, an optical film 13, a liquid crystal display screen 14, and a glass cover plate 15.

[0035] As Figure 2 shown, the plastic middle frame 12 is provided on the backplane 11. The plastic middle frame 12 has a boss 16. A card slot 17 is formed between the boss 16 and the backplane 11. The optical film 13 is provided on one side of the boss 16 and is snap-fitted into the card slot 17. The liquid crystal display screen 14 is provided on the other side of the boss 16 through an EVA shock-absorbing cotton 18. An interval is formed between the liquid crystal display screen 14 and the optical film 13. The glass cover plate 15 is adhered to the liquid crystal display screen 14 with glue.

[0036] As Figure 2 shown, in addition, the intelligent interactive touch tablet 10 further includes a support column 19 provided on the backplane 11. The support column 19 is made of a foaming material. When necessary, the support column 19 is used to provide an appropriate supporting force for the optical film 13 to prevent the optical film 13 from being severely sunken. In addition, the distance between the support column 19 and the optical film 13 is about 2-3 mm. Usually, the support column 19 does not contact the optical film 13 to prevent the optical film 13 from being punctured by the support column 19.

[0037] Furthermore, due to the barrier of the boss 16, the optical film 13 and the liquid crystal display screen 14 are spaced apart from each other. A considerable part of the area of the liquid crystal display screen 14 is in a suspended state without support. When the liquid crystal display screen 14 is subjected to an external force, it is very easy to be sunken, resulting in poor picture display quality.

[0038] Furthermore, through the introduction of background technology, it can be known that the current technology uses glue dispensing to bond the liquid crystal display screen 14 and the glass cover plate 15. When the glass cover plate 15 applies pressure to the liquid optical glue, the liquid crystal display screen 14 in the glass cover plate 15 will also be affected by the pressure and the gravity of the liquid optical glue, causing the liquid crystal display screen 14 to sink. Therefore, after bonding, a very obvious uneven bonding thickness will be formed. The thickness in the middle part of the bonding is particularly large, while the thickness at the edge is particularly small, which can easily lead to uneven force on the TFT-LCD liquid crystal display screen, thereby resulting in a large amount of process glue used, high cost, poor flatness, and easy generation of Muar.

[0039] Please also read Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 In order to solve the above technical problems, the present invention proposes a smart interactive touch tablet 20 based on glue-free bonding, including: a back panel 100, a plastic middle frame 200, an aluminum profile front frame 300, an optical film 400, a liquid crystal display 500, and a glass cover 600.

[0040] like Figure 7 As shown, the plastic middle frame 200 is disposed at the side edge of the back plate 100 , and the plastic middle frame 200 has a boss 210 , a slot 211 is formed between the boss 210 and the board surface of the back plate 100 , and the boss 210 is away from the board surface of the back plate 100 to form a mounting surface 220 .

[0041] like Figure 7 As shown, the edge of the optical film 400 is against the mounting surface 220. Specifically, the optical film 400 includes a diffuser plate 410, a diffuser film 420, and a DOP composite film 430 which are sequentially attached; wherein the edge of the diffuser plate 410 is against the mounting surface 220, and the DOP composite film 430 is attached to the liquid crystal display screen 500.

[0042] like Figure 7 As shown, the liquid crystal display screen 500 is attached to the optical film 400 , and the glass cover plate 600 is attached to the liquid crystal display screen 500 .

[0043] like Figure 7 As shown, the aluminum profile front frame 300 is clamped with the glass cover plate 600 and connected to the back plate 100 through fasteners. For example, the aluminum profile front frame 300 can be fixedly connected to the back plate 100 by locking screws.

[0044] like Figure 6 As shown, a filling cavity 101 is formed between the optical film 400 and the back plate 100; the smart interactive touch panel 20 based on adhesive-free bonding further includes a buffer member 700 (such as Figure 5 shown).

[0045] Here, it should be noted that traditionally, glue is bonded between the liquid crystal display screen 500 and the glass cover plate 600. The glass cover plate 600 has relatively high structural strength, and the glass cover plate 600 prevents the liquid crystal display screen 500 from being sunken through the glue. In the present invention, the glass cover plate 600 is directly attached to the liquid crystal display screen 500 without using the traditional glue attachment. Since the liquid crystal display screen 500 is supported by the optical film 400 and the buffer member 700, it has a very stable supporting force, and the liquid crystal display screen 500 is not easily sunken, which can ensure better image quality.

[0046] As can be seen from the foregoing, in the traditional technology, the support post 19 made of foaming material is used. The support post 19 is used to provide appropriate supporting force for the optical film 13 to prevent the optical film 13 from being severely sunken. In addition, the distance between the support post 19 and the optical film 13 is about 2-3 mm. Generally, the support post 19 does not contact the optical film 13 to prevent the optical film 13 from being punctured by the support post 19.

[0047] If in the present invention, the support post 19 with such a structural form is simply adopted, the tip of the support post 19 is not only likely to puncture the optical film 13, but also directly apply force to the liquid crystal display screen 500 through the optical film 13, thereby puncturing the liquid crystal display screen 500 as well.

[0048] To solve this technical problem, the structural form of the buffer member 700 is particularly optimized.

[0049] As Figure 7 shown, specifically, the buffer member 700 is bent to form a wavy structure, and both ends of the buffer member 700 are respectively clamped in the card slots 211 on both sides;

[0050] As Figure 5 shown, the buffer member 700 has a plurality of front-end abutting portions 710 that abut against the optical film 400, and the buffer member 700 has a plurality of rear-end abutting portions 720 that abut against the back plate 100. An elastic abutment is formed between the optical film 400 and the back plate 100 through the buffer member 700;

[0051] The distance between two adjacent front-end abutting portions 710 is equal, thus ensuring that the optical film 400 and the liquid crystal display screen 500 are more evenly stressed;

[0052] As Figure 5 shown, a heat dissipation space 800 is formed between the wavy structure buffer member 700 and the optical film 400.

[0053] Since the buffer member 700 is bent to form a wavy structure, this structure has good buffering performance in two different directions. Whether a force is applied and pushed from the direction of the back plate 100 or from the direction of the glass cover plate 600, the wavy buffer member 700 can handle it well.

[0054] In addition, the multiple front abutting portions 710 abutting against the optical film 400 have an arc transition. Unlike the traditional support posts 19 which have dust ends, they can better protect the optical film 400 from force. And the distances between adjacent two front abutting portions 710 are equal, thus ensuring that the optical film 400 and the liquid crystal display screen 500 are stressed more evenly.

[0055] It should be emphasized that the card slot 211 of the present invention was originally used to clamp the optical film 400. Since the optical film 400 moves upward and fits with the liquid crystal display screen 500, the card slot 211 will be in a vacant state. Since the buffer member 700 of the present invention is wavy bent and needs to be fixed on both sides to have good elastic performance, and the buffer member 700 just realizes clamping by means of the card slots 211 on both sides. Thus, the card slot 211 has a good "use", and there is no need to make special improvements to the plastic middle frame 200, reducing the production cost. It can directly use the existing inventory materials, and the supplier does not need to redesign a new structure either.

[0056] During the use of the product, the optical film 400 and the liquid crystal display screen 500 will generate heat. If the heat accumulates and cannot be effectively dissipated, it will affect the performance of the product. The buffer member 700 of the present invention not only provides a stable supporting force for the optical film 400 and the liquid crystal display screen 500, but also forms a heat dissipation space 800 between the buffer member 700 and the optical film 400, enabling the heat to be effectively dissipated through the heat dissipation space 800.

[0057] In this embodiment, the buffer member 700 is a plastic part formed by integral injection molding. In other embodiments, the buffer member 700 is a metal part formed by integral bending.

[0058] An intelligent interactive touch panel based on glue-free lamination of the present invention adjusts the position of the optical film so that the optical film and the liquid crystal display screen are laminated together, and is supported by a buffer member with optimized structure, while solving the heat dissipation problem and preventing the liquid crystal display screen from being indented by force and resulting in poor image quality.

[0059] An intelligent interactive touch panel based on glue-free lamination of the present invention solves the problem of the display viewing angle. The frame lamination is only about 140°. Using this solution can reach 178°. At the same time, it solves the limitation of using 3M glue in full lamination, saves more than 30% in cost, and improves the yield by more than 20%.

[0060] The embodiments described above merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. An intelligent interactive touch panel based on glue-free bonding, comprising: A back panel, a plastic middle frame, an aluminum profile front frame, an optical film, a liquid crystal display screen, and a glass cover plate; the plastic middle frame is arranged at the side edge of the back panel, the plastic middle frame has a boss, a slot is formed between the boss and the plate surface of the back panel, and the boss is away from the plate surface of the back panel to form a mounting surface; the edge of the optical film is abutted against the mounting surface; the liquid crystal display screen is attached to the optical film, and the glass cover plate is attached to the liquid crystal display screen; the aluminum profile front frame is clamped with the glass cover plate and connected to the back panel through fasteners; A filling cavity is formed between the optical film and the back plate; the smart interactive touch panel based on glueless bonding also includes a buffer member arranged in the filling cavity; The invention is characterized in that the buffer is bent to form a wavy structure, and the two ends of the buffer are respectively clamped in the clamping grooves on both sides; the buffer has a plurality of front end abutting portions abutting against the optical film, and the buffer has a plurality of rear end abutting portions abutting against the back plate, and the optical film and the back plate are elastically abutted by the buffer; the distances between two adjacent front end abutting portions are equal; and a heat dissipation space is formed between the wavy structure buffer and the optical film.

2. The smart interactive touch panel based on glue-free bonding according to claim 1, characterized in that: The buffer component is an integrally injection-molded plastic component.

3. The smart interactive touch panel based on glue-free bonding according to claim 1, characterized in that: The buffer component is a metal component formed by bending in one piece.

4. The smart interactive touch panel based on glue-free bonding according to claim 1, characterized in that: The optical film comprises a diffusion plate, a diffusion film, and a DOP composite film which are sequentially bonded together; wherein the edge of the diffusion plate is abutted against the mounting surface, and the DOP composite film is bonded to the liquid crystal display screen.

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