Intelligent interactive touch panel based on glue-free lamination

Abstract

The invention discloses an intelligent interactive touch panel based on glue-free lamination. The intelligent interactive touch panel comprises 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 on the side edge of the back plate and provided with a boss, a clamping groove is formed between the boss and the plate face of the back plate, and the plate face, away from the back plate, of the boss forms an installation face. The edge of the optical film is propped 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. And the aluminum profile front frame is clamped with the glass cover plate and is connected with the back plate through a fastener. According to the intelligent interactive touch panel based on glue-free attachment, the position of the optical film is adjusted, so that the optical film and the liquid crystal display screen are attached to each other, the buffer piece with the optimized structure is used for supporting, meanwhile, the heat dissipation problem is solved, and the phenomenon that the image quality is poor due to the fact that the liquid crystal display screen is sunken due to stress 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 arranged at the side edge of the back plate, and the plastic middle frame has a boss, a slot is formed between the boss and the plate surface of the back plate, and the boss is away from the plate surface of the back plate to form a mounting surface;

[0008] The edge of the optical film is held against the mounting surface;

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

[0010] The aluminum profile front frame is clamped with the glass cover plate and connected to the back plate via fasteners.

[0011] In one embodiment,

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

[0013] The smart interactive touch panel based on glue-free bonding also includes a buffer member arranged in the filling cavity.

[0014] In one embodiment,

[0015] The buffer is bent to form a wave-like structure, and two ends of the buffer are respectively clamped in the clamping grooves on both sides;

[0016] The buffer member has a plurality of front end abutting portions abutting against the optical film, and the buffer member 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 member;

[0017] The distance between two adjacent front end abutting portions is equal;

[0018] A heat dissipation space is formed between the wave-shaped structure buffer and the optical film.

[0019] In one embodiment, the buffer component is an integrally injection-molded plastic component.

[0020] In one embodiment, the buffer component is a metal component formed by bending in one piece.

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

[0022] The intelligent interactive touch tablet based on glue-free bonding of the present invention adjusts the position of the optical film so that the optical film and the liquid crystal display screen are bonded together, and is supported by a buffer with optimized structure, thereby solving the heat dissipation problem and preventing the liquid crystal display screen from being depressed by force and causing poor image quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a structural schematic diagram of a smart interactive touch panel in the prior art;

[0025] Figure 2 for Figure 1 A partial diagram of the smart interactive touch panel shown;

[0026] Figure 3 This is a front view of a smart interactive touch panel based on glue-free bonding according to an embodiment of the present invention;

[0027] Figure 4 for Figure 3 The rear view of the smart interactive touch panel based on glue-free bonding is shown;

[0028] Figure 5 for Figure 4 Section view along line AA;

[0029] Figure 6 for Figure 5 Schematic diagram after removing the buffer;

[0030] Figure 7 for Figure 5 A partial picture of . DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given 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, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

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

[0034] like Figure 1 and Figure 2 , which is a schematic diagram of the structure of a prior art smart interactive touch tablet 10. The smart interactive touch tablet 10 includes: a back panel 11, a plastic middle frame 12, an optical film 13, a liquid crystal display screen 14, and a glass cover 15.

[0035] like Figure 2 As shown, the plastic middle frame 12 is arranged on the back plate 11, and the plastic middle frame 12 has a boss 16. A card slot 17 is formed between the boss 16 and the back plate 11. The optical film 13 is arranged on one side of the boss 16 and is snapped into the card slot 17, and the liquid crystal display screen 14 is arranged on the other side of the boss 16 through the EVA shockproof cotton 18. A gap is formed between the liquid crystal display screen 14 and the optical film 13, and the glass cover plate 15 is bonded to the liquid crystal display screen 14 by glue.

[0036] like Figure 2 As shown, in addition, the smart interactive touch tablet 10 also includes a support column 19 disposed on the back plate 11. The support column 19 is made of a foam material. When necessary, the support column 19 is used to provide appropriate support force for the optical film 13 to prevent the optical film 13 from being seriously dented. In addition, the distance between the support column 19 and the optical film 13 is about 2-3 mm. Under normal circumstances, the support column 19 does not contact the optical film 13 to prevent the optical film 13 from being broken by the support column 19.

[0037] Furthermore, due to the obstruction of the boss 16, the optical film 13 and the LCD screen 14 are spaced apart from each other, and a considerable portion of the LCD screen 14 is in an unsupported suspended state. The LCD screen 14 is very likely to sag when subjected to external forces, resulting in poor image 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 conventionally, glue is applied between the LCD screen 500 and the glass cover plate 600. The glass cover plate 600 has a relatively high structural strength, and the glass cover plate 600 prevents the LCD screen 500 from being dented by the glue. However, the glass cover plate 600 of the present invention is directly attached to the LCD screen 500 without the need for conventional glue. Since the LCD screen 500 is supported by the optical film 400 and the buffer 700, it has a very stable supporting force, and the LCD screen 500 is not prone to being dented, thereby ensuring better image quality.

[0046] As can be seen from the above, in the conventional technology, a support column 19 made of foam material is used, and the support column 19 is used to provide appropriate supporting force for the optical film 13 to prevent the optical film 13 from being seriously dented. In addition, the distance between the support column 19 and the optical film 13 is about 2-3 mm. Normally, the support column 19 does not contact the optical film 13 to prevent the optical film 13 from being broken by the support column 19.

[0047] If the present invention still simply adopts the support column 19 of this structural form, the tip of the support column 19 will not only easily break the optical film 13, but also directly apply force to the liquid crystal display screen 500 through the optical film 13, thereby breaking the liquid crystal display screen 500.

[0048] In order to solve this technical problem, the structure of the buffer component 700 is optimized.

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

[0050] like Figure 5 As shown, the buffer 700 has a plurality of front end abutting portions 710 abutting against the optical film 400, and the buffer 700 has a plurality of rear end abutting portions 720 abutting against the back plate 100, and the optical film 400 and the back plate 100 are elastically abutted by the buffer 700;

[0051] The distances between two adjacent front end abutting portions 710 are equal, thereby ensuring that the optical film 400 and the liquid crystal display screen 500 are subjected to more uniform force;

[0052] like Figure 5 As shown, a heat dissipation space 800 is formed between the wave-shaped structure buffer 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 the force is pushed from the direction of the back panel 100 or the direction of the glass cover plate 600, the wavy structure buffer member 700 can cope with it well.

[0054] In addition, the front end abutting portions 710 abutting against the optical film 400 are arc-shaped transitions, unlike the conventional support column 19 which has dust ends, and can better protect the optical film 400. And the distance between two adjacent front end abutting portions 710 is equal, thereby ensuring that the optical film 400 and the liquid crystal display screen 500 are subjected to more uniform force.

[0055] It should be emphasized that the card slot 211 of the present invention was originally used to snap into the optical film 400. As the optical film 400 moves upward and fits with the liquid crystal display 500, the card slot 211 will be in a vacant state. Since the buffer 700 of the present invention is wavy and needs to be fixed on both sides to have better elastic performance, and the buffer 700 just makes use of the card slots 211 on both sides to achieve snap connection. Therefore, the card slot 211 has a better "place to use" without the need to make special improvements to the plastic middle frame 200, thereby reducing production costs. Existing inventory materials can be directly used, and suppliers do not need to redesign new structures.

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

[0057] In this embodiment, the buffer component 700 is an integrally injection-molded plastic component. In other embodiments, the buffer component 700 is an integrally bent metal component.

[0058] The intelligent interactive touch tablet based on glue-free bonding of the present invention adjusts the position of the optical film so that the optical film and the liquid crystal display screen are bonded together, and is supported by a buffer with optimized structure, thereby solving the heat dissipation problem and preventing the liquid crystal display screen from being depressed by force and causing poor image quality.

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

[0060] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A smart interactive touch panel based on glue-free bonding, characterized in that: include: Back panel, plastic middle frame, aluminum front frame, optical film, LCD display, glass cover; The plastic middle frame is arranged at the side edge of the back plate, and the plastic middle frame has a boss, a slot is formed between the boss and the plate surface of the back plate, and the boss is away from the plate surface of the back plate to form a mounting surface; The edge of the optical film is held against the mounting surface; The liquid crystal display screen is attached to the optical film, and the glass cover 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 plate via fasteners.

2. The smart interactive touch panel based on glue-free bonding according to claim 2, characterized in that: A filling cavity is formed between the optical film and the back plate; The smart interactive touch panel based on glue-free bonding also includes a buffer member arranged in the filling cavity.

3. The smart interactive touch panel based on glue-free bonding according to claim 2, characterized in that: The buffer is bent to form a wave-like structure, and two ends of the buffer are respectively clamped in the clamping grooves on both sides; The buffer member has a plurality of front end abutting portions abutting against the optical film, and the buffer member 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 member; The distance between two adjacent front end abutting portions is equal; A heat dissipation space is formed between the wave-shaped structure buffer and the optical film.

4. The smart interactive touch panel based on glue-free bonding according to claim 3, characterized in that: The buffer component is an integrally injection-molded plastic component.

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

6. 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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