Anti-static liquid crystal display screen

Abstract

The utility model discloses an anti-static liquid crystal display screen, which relates to the field of display screens and comprises an array substrate, a color film substrate, a conductive pressure-sensitive adhesive layer and an upper polaroid which are sequentially stacked from bottom to top, one side of the array substrate exceeds the color film substrate to form a first exposed area, one side of the color film substrate exceeds the conductive pressure-sensitive adhesive layer to form a second exposed area, and the other side of the color film substrate exceeds the conductive pressure-sensitive adhesive layer to form a second exposed area. A second exposed area is formed, the first exposed area is provided with a grounding electrode, the first exposed area, the second exposed area and the grounding electrode are covered with a photocuring conductive adhesive layer, and the conductive pressure-sensitive adhesive layer is electrically communicated with the grounding electrode through the photocuring conductive adhesive layer; according to the utility model, the photocuring conductive adhesive layer can be quickly cured after being irradiated by UV (Ultraviolet) without solvent residue and volatilization, the upper polaroid cannot be corroded, the problem of poor appearance of the display screen is avoided, and the appearance quality of the liquid crystal display screen is ensured; the ITO protection adhesive and the photocuring conductive adhesive can be prevented from being mixed, the stability of the circuit is ensured, and the quality problem of the display screen is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of display screens, in particular to an anti-static liquid crystal display screen. Background Art

[0002] In recent years, with the advancement of science and technology and the development of society, mobile phones have entered people's lives and work, and are closely related to people's lives. In daily use, the normal operation of the liquid crystal display screen of the mobile phone is very important. The liquid crystal display module of the current mobile phone often carries high-voltage static electricity due to its material and the use environment. The main control chip of the liquid crystal display module has weak static electricity interference ability. Therefore, static electricity is harmful to the operation of the main control chip of the liquid crystal display module, often causing screen noise, and in severe cases, causing the liquid crystal display module to fail to work.

[0003] At present, in order to conduct static electricity on the surface of the liquid crystal display screen, mobile phone display modules will add conductive silver paste to the lower edge of the upper polarizer, so that the PSA conductive glue of the upper polarizer is connected to the ground electrode on the array substrate to form a static electricity conduction path. For example, patent application number CN201821088145.1 discloses a static electricity-conducting liquid crystal display screen, which includes an array substrate, a color filter substrate, a conductive pressure-sensitive adhesive film and an upper polarizer stacked in sequence from bottom to top, one side of the array substrate exceeds the color filter substrate to form a first exposed area, one side of the color filter substrate exceeds the conductive pressure-sensitive adhesive film to form a second exposed area, one side of the conductive pressure-sensitive adhesive film exceeds the upper polarizer to form a third exposed area, the first exposed area, the second exposed area and the third exposed area are formed on the same side of the liquid crystal display screen, the first exposed area is provided with a grounding position, and the third exposed area, the second exposed area and the grounding position are electrically connected through a conductive structure; in this scheme, a conductive pressure-sensitive adhesive film is arranged between the upper polarizer and the color filter substrate, and the conductive pressure-sensitive adhesive film is connected to the grounding position through a conductive structure. The grounding beer position is electrically connected to achieve the purpose of conducting static electricity, and the setting of the conductive pressure-sensitive adhesive film is much cheaper than the high-resistance film in the prior art, the process is more stable, and the risk is lower; however, this mode of applying conductive silver paste to conduct static electricity has the problem that the conductive silver paste solvent corrodes the conductive pressure-sensitive adhesive and PVA glue on the upper polarizer, causing the corrosion area to enter the VA area, resulting in poor appearance, and the corrosion of the polarizer by the conductive silver paste solvent is a process that gradually advances over time and will not end all at once, which poses a great risk to the appearance quality; and in order to protect the ITO circuit on the array substrate, ITO protective glue will be applied to the single-layer area to cover the silver paste grounding position to form protection. After applying the conductive silver paste, directly applying the ITO protective glue (generally UV glue) will cause the conductive silver paste to mix with the ITO protective glue, thereby causing the silver powder particles to diffuse, and there is a risk of short circuit with the ITO circuit. Therefore, the utility model discloses an anti-static liquid crystal display screen to solve the above problems. Utility Model Content

[0004] Based on this, it is necessary to provide an anti-static liquid crystal display screen to address the above technical problems. The conductive pressure-sensitive adhesive layer on the upper polarizer is connected to the ground electrode using a photocurable conductive adhesive layer to form an electrostatic conduction path. The photocurable conductive adhesive layer can be quickly cured after UV light without any solvent residue or volatilization, and will not corrode the upper polarizer, thereby avoiding poor appearance of the display screen and ensuring the appearance quality of the liquid crystal display screen. The ITO protective adhesive is covered on the cured photocurable conductive adhesive layer to avoid mixing of the ITO protective adhesive and the photocurable conductive adhesive, effectively preventing short circuits in the ITO circuits, ensuring the stability of the circuit, and avoiding quality problems with the display screen.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] An antistatic liquid crystal display screen comprises an array substrate, a color filter substrate, a conductive pressure-sensitive adhesive layer and an upper polarizer which are stacked in sequence from bottom to top, one side of the array substrate exceeds the color filter substrate to form a first exposed area, one side of the color filter substrate exceeds the conductive pressure-sensitive adhesive layer to form a second exposed area, the first exposed area and the second exposed area are located on the same side, a grounding electrode is provided in the first exposed area, a photocurable conductive adhesive layer is covered between the first exposed area, the second exposed area and the grounding electrode, and the conductive pressure-sensitive adhesive layer is electrically connected to the grounding electrode through the photocurable conductive adhesive layer.

[0007] As a preferred implementation of the anti-static liquid crystal display screen provided by the utility model, it also includes a lower polarizer, and the lower polarizer is arranged on a side of the array substrate away from the color filter substrate.

[0008] As a preferred implementation of the anti-static liquid crystal display screen provided by the utility model, it also includes a backlight frame, and the backlight frame is arranged on a side of the lower polarizer away from the array substrate.

[0009] As a preferred embodiment of the antistatic liquid crystal display screen provided by the utility model, it also includes a cover plate, and the cover plate is bonded to the upper surface of the upper polarizer through a bonding adhesive layer.

[0010] As a preferred implementation of the anti-static liquid crystal display screen provided by the utility model, the grounding electrodes are provided in two and are symmetrically arranged.

[0011] As a preferred implementation of the antistatic liquid crystal display screen provided by the utility model, the light-curing conductive adhesive layer is an ultraviolet light-curing adhesive layer.

[0012] As a preferred implementation of the antistatic liquid crystal display screen provided by the utility model, the plane shape of the photocurable conductive adhesive layer is L-shaped, and the photocurable conductive adhesive layer is arranged along the length direction of the second exposed area.

[0013] As a preferred implementation of the anti-static liquid crystal display screen provided by the utility model, a driver IC is provided in the first exposed area, and the first exposed area is covered with ITO protective glue.

[0014] As a preferred implementation of the anti-static liquid crystal display screen provided by the utility model, an FPC extends outwardly from the first exposed area.

[0015] As a preferred implementation of the antistatic liquid crystal display screen provided by the utility model, one side of the conductive pressure-sensitive adhesive layer exceeds the upper polarizer, and the photocurable conductive adhesive layer covers the area where the conductive pressure-sensitive adhesive layer exceeds the upper polarizer.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model provides an anti-static liquid crystal display screen, which adopts a photocurable conductive adhesive layer to connect the conductive pressure-sensitive adhesive layer on the upper polarizer with the ground electrode to form an electrostatic conduction path. The photocurable conductive adhesive layer can be quickly cured after UV light exposure without solvent residue and volatilization, and will not corrode the upper polarizer, thereby avoiding poor appearance problems of the display screen and ensuring the appearance quality of the liquid crystal display screen; the ITO protective adhesive is covered on the cured photocurable conductive adhesive layer, which can avoid mixing of the ITO protective adhesive and the photocurable conductive adhesive, effectively preventing short circuits in the ITO circuits, ensuring the stability of the circuits, and avoiding quality problems in the display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the scheme in the utility model, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic plan view of the antistatic liquid crystal display screen provided by the utility model;

[0020] Figure 2 A partial structural plan view of the antistatic liquid crystal display screen provided by the utility model;

[0021] Figure 3 The utility model is a schematic side view of the overall structure of the antistatic liquid crystal display screen.

[0022] The markings in the figure are as follows:

[0023] 1. Array substrate; 2. Color film substrate; 3. Conductive pressure-sensitive adhesive layer; 4. Upper polarizer; 5. First exposed area; 6. Second exposed area; 7. Ground electrode; 8. Photocurable conductive adhesive layer; 9. Driver IC; 10. ITO protective adhesive; 11. FPC; 12. Lower polarizer; 13. Backlight frame; 14. Cover plate; 15. Laminating adhesive layer. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0025] As described in the background technology, the mode of applying conductive silver paste to discharge static electricity may cause the conductive silver paste solvent to corrode the conductive pressure-sensitive adhesive and PVA adhesive on the upper polarizer, causing the corrosion area to enter the VA area, resulting in a problem of poor appearance. In addition, the corrosion of the polarizer by the conductive silver paste solvent is a process that gradually advances over time and will not end all at once, posing a great risk to the appearance quality. In addition, in order to protect the ITO circuit on the array substrate, ITO protective glue will be applied to the single-layer area to cover the silver paste contact position to form a protection. After applying the conductive silver paste, directly applying the ITO protective glue will cause the conductive silver paste to mix with the ITO protective glue, thereby causing the silver powder particles to diffuse, posing a risk of short circuit with the ITO circuit.

[0026] In order to solve this technical problem, the utility model provides an anti-static liquid crystal display screen, which is applied in the field of display screens.

[0027] Specifically, please refer to Figure 1-3 The antistatic liquid crystal display screen specifically includes an array substrate 1, a color filter substrate 2, a conductive pressure-sensitive adhesive layer 3 and an upper polarizer 4 which are stacked in sequence from bottom to top. One side of the array substrate 1 exceeds the color filter substrate 2 to form a first exposed area 5. One side of the color filter substrate 2 exceeds the conductive pressure-sensitive adhesive layer 3 to form a second exposed area 6. The first exposed area 5 and the second exposed area 6 are located on the same side. The first exposed area 5 is provided with a grounding electrode 7. A photocurable conductive adhesive layer 8 is covered between the first exposed area 5, the second exposed area 6 and the grounding electrode 7. The conductive pressure-sensitive adhesive layer 3 is electrically connected to the grounding electrode 7 through the photocurable conductive adhesive layer 8.

[0028] The anti-static liquid crystal display screen provided by the utility model adopts a photocurable conductive adhesive layer 8 to connect the conductive pressure-sensitive adhesive layer 3 on the upper polarizer 4 with the ground electrode 7 to form an electrostatic conduction path. The photocurable conductive adhesive layer 8 can be quickly cured after UV light exposure without solvent residue and volatilization, and will not corrode the upper polarizer 4, thereby avoiding poor appearance problems of the display screen and ensuring the appearance quality of the liquid crystal display screen; the ITO protective adhesive 10 is covered on the cured photocurable conductive adhesive layer 8, which can avoid the mixing of the ITO protective adhesive 10 and the photocurable conductive adhesive, effectively preventing the ITO circuit from being short-circuited, ensuring the stability of the circuit, and avoiding quality problems of the display screen.

[0029] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] Example 1

[0033] Please refer to Figure 1-3 , provides an anti-static liquid crystal display screen, which includes an array substrate 1, a color filter substrate 2, a conductive pressure-sensitive adhesive layer 3 and an upper polarizer 4 stacked in sequence from bottom to top, one side of the array substrate 1 exceeds the color filter substrate 2 to form a first exposed area 5, one side of the color filter substrate 2 exceeds the conductive pressure-sensitive adhesive layer 3 to form a second exposed area 6, the first exposed area 5 and the second exposed area 6 are located on the same side, the first exposed area 5 is provided with a grounding electrode 7, the first exposed area 5, the second exposed area 6 and the grounding electrode 7 are covered with a photocurable conductive adhesive layer 8, and the conductive pressure-sensitive adhesive layer 3 is electrically connected to the grounding electrode 7 through the photocurable conductive adhesive layer 8.

[0034] In this example, the original conductive silver paste is replaced with a photocurable conductive adhesive layer 8. After the photocurable conductive adhesive layer 8 is covered, it is irradiated under UV light to cure it. The curing is rapid, which ensures production efficiency. The cured photocurable conductive adhesive layer 8 has no solvent residue and volatilization, so it will not corrode the upper polarizer 4 and the conductive pressure-sensitive adhesive layer 3 and PVA adhesive layer on the upper polarizer 4, thereby avoiding poor appearance of the display screen and ensuring the appearance quality of the liquid crystal display screen. Moreover, the cured conductive pressure-sensitive adhesive layer 3 will not mix with the ITO protective adhesive 10, thereby avoiding short circuit of the ITO circuit.

[0035] The preparation process and structural layer of the upper polarizer 4 are consistent with the structure of the upper polarizer 4 in a novel electrostatically conductive liquid crystal display disclosed in the company's patent application number CN201821088143.2 and a electrostatically conductive liquid crystal display disclosed in the patent application number CN201821088145.1, and are not described further here.

[0036] Moreover, the array substrate 1 and the color filter substrate 2 are arranged opposite to each other, and a liquid crystal layer is provided between the array substrate 1 and the color filter substrate 2. The structures and connection relationships of the array substrate 1, the color filter substrate 2 and the liquid crystal layer are already known in the prior art and will not be elaborated on here.

[0037] A driving IC 9 is arranged in the first exposed area 5 , and the first exposed area 5 is covered with an ITO protective glue 10 . Two grounding electrodes 7 are arranged symmetrically on both sides of the driving IC 9 . Meanwhile, an FPC 11 extends outward from the first exposed area 5 .

[0038] In this example, the photocurable conductive adhesive layer 8 is an ultraviolet light-curable adhesive layer, which is composed of an adhesive, a conductive filler, a toughening agent, a coupling agent, a curing agent and a solvent. According to the chemical composition of the adhesive, it can be divided into inorganic conductive adhesives and organic conductive adhesives, and the most commonly used is organic conductive adhesive. Commonly used adhesives are epoxy acrylic resins, phenolic epoxy acrylic resins, polyurethane acrylic resins, and acrylic resins; the conductive fillers are one or a combination of two or more of gold powder, silver powder, copper powder, nickel powder, aluminum powder, graphite, carbon black, carbon fiber, silver-plated copper powder, silver-plated silica powder, and silver-plated glass beads, which can be quickly cured under ultraviolet light. Of course, in order to facilitate molding, the viscosity of the photocurable conductive adhesive can be appropriately thickened.

[0039] Example 2

[0040] The antistatic liquid crystal display screen provided in Example 1 is further optimized, specifically, as follows: Figure 3 As shown, a lower polarizer 12 is also arranged on the surface of the lower polarizer 12, and the lower polarizer 12 is arranged on the side of the array substrate 1 away from the color film substrate 2. A backlight frame 13 is also arranged on the surface of the lower polarizer 12, and the backlight frame 13 is arranged on the side of the lower polarizer 12 away from the array substrate 1. A cover plate 14 is fully bonded to the upper surface of the upper polarizer 4 through a bonding adhesive layer 15, so that the cover plate 14 is fixed on the upper polarizer 4. The combination of the lower polarizer 12 and the upper polarizer 4 realizes the polarization effect on the liquid crystal display screen, which is a conventional technology and will not be described here.

[0041] Example 3

[0042] The antistatic liquid crystal display screen provided in Example 2 is further optimized, specifically, as follows: Figure 1-3As shown, the planar shape of the photocurable conductive adhesive layer 8 is L-shaped, and the photocurable conductive adhesive layer 8 is arranged along the length direction of the second exposed area 6, that is, the lateral direction of the photocurable conductive adhesive layer 8 is along the expansion and contraction direction of the absorption axis of the upper polarizer 4, thereby ensuring the quality of the electrical connection. One side of the conductive pressure-sensitive adhesive layer 3 exceeds the upper polarizer 4, and the photocurable conductive adhesive layer 8 covers the area where the conductive pressure-sensitive adhesive layer 3 exceeds the upper polarizer 4, so that the photocurable conductive adhesive layer 8 can cover the conductive pressure-sensitive adhesive layer 3 to the greatest extent.

[0043] The working principle of the anti-static liquid crystal display screen provided by the utility model is as follows: during assembly, after the polarizer, COG, and FOG are affixed to the liquid crystal display screen, ultraviolet light-curing conductive glue can be applied to the bottom edge of the upper polarizer 4, and then UV irradiation curing is performed, and then ITO protective glue 10 is applied to the single-layer area of ​​the array substrate 1. Because the UV ultraviolet light-curing conductive glue has been cured in advance, the ITO protective glue 10 cannot be mixed with the UV ultraviolet light-curing conductive glue, which effectively prevents short circuits in the ITO circuits, ensures the stability of the circuit, and avoids quality problems in the display screen. At the same time, a photocurable conductive glue layer 8 is used to connect the conductive pressure-sensitive glue layer 3 on the upper polarizer 4 with the ground electrode 7 to form an electrostatic conduction path. The photocurable conductive glue layer 8 can be quickly cured after UV light irradiation without solvent residue or volatilization, and will not corrode the upper polarizer 4, thereby avoiding poor appearance problems of the display screen and ensuring the appearance quality of the liquid crystal display screen.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. An anti-static liquid crystal display screen, comprising an array substrate, a color filter substrate, a conductive pressure-sensitive adhesive layer and an upper polarizer stacked in sequence from bottom to top, one side of the array substrate exceeds the color filter substrate to form a first exposed area, one side of the color filter substrate exceeds the conductive pressure-sensitive adhesive layer to form a second exposed area, the first exposed area and the second exposed area are located on the same side, and the first exposed area is provided with a grounding electrode, characterized in that: A photocurable conductive adhesive layer is covered between the first exposed area, the second exposed area and the ground electrode, and the conductive pressure-sensitive adhesive layer is electrically connected to the ground electrode through the photocurable conductive adhesive layer.

2. The antistatic liquid crystal display screen according to claim 1, characterized in that: The invention also comprises a lower polarizer, which is arranged on a side of the array substrate away from the color filter substrate.

3. The antistatic liquid crystal display screen according to claim 2, characterized in that: A backlight frame is also included, and the backlight frame is arranged on a side of the lower polarizer away from the array substrate.

4. The antistatic liquid crystal display screen according to claim 1, characterized in that: A cover plate is also included, and the cover plate is bonded to the upper surface of the upper polarizer through a bonding adhesive layer.

5. The antistatic liquid crystal display screen according to claim 1, characterized in that: The number of ground electrodes is two and they are symmetrically arranged.

6. The antistatic liquid crystal display screen according to claim 1, characterized in that: The light-cured conductive adhesive layer is an ultraviolet light-cured adhesive layer.

7. The antistatic liquid crystal display screen according to claim 6, characterized in that: The plane shape of the photocurable conductive adhesive layer is L-shaped, and the photocurable conductive adhesive layer is arranged along the length direction of the second exposed area.

8. The antistatic liquid crystal display screen according to claim 1, characterized in that: The first exposed area is provided with a driving IC, and the first exposed area is covered with ITO protective glue.

9. The antistatic liquid crystal display screen according to claim 1, characterized in that: An FPC extends outwardly from the first exposed area.

10. The antistatic liquid crystal display screen according to claim 1, characterized in that: One side of the conductive pressure-sensitive adhesive layer extends beyond the upper polarizer, and the photocurable conductive adhesive layer covers the area where the conductive pressure-sensitive adhesive layer extends beyond the upper polarizer.

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