Liquid crystal display screen and display module

Abstract

The utility model discloses a liquid crystal display screen which comprises an upper substrate, a lower substrate and an upper polaroid, the upper substrate and the lower substrate are oppositely arranged, and the upper polaroid is provided with conductive pressure-sensitive adhesive and is attached to the surface of the side, away from the lower substrate, of the upper substrate through the conductive pressure-sensitive adhesive. The conductive carbon paste ink is arranged on the surface of one side, close to the upper polaroid, of the upper substrate, is positioned in the peripheral area of the upper substrate, is in contact with the conductive pressure-sensitive adhesive, and extends out of the upper polaroid to form an epitaxial part; and one end of the conductive part is electrically connected with the extension part of the conductive carbon paste ink from the upper polaroid, and the other end of the conductive part is electrically connected with a grounding terminal of the lower substrate. According to the liquid crystal display screen, the recycling difficulty of the upper substrate can be reduced. The utility model provides a display module which comprises the liquid crystal display screen.

Description

Technical Field

[0001] The utility model relates to display technology, in particular to a liquid crystal display screen and a display module. Background Art

[0002] With the development of liquid crystal display technology, various liquid crystal display screens are widely used in devices with display functions such as televisions, computers, mobile phones, etc. In the production process of liquid crystal display screens, static charges will inevitably be generated on the surface of the display screens. When the static charges accumulate to a certain amount, it is very likely to break down the display screen and cause fatal damage to the display screen.

[0003] In order to prevent the static breakdown of the liquid crystal display screen, the current conventional practice in the industry is to provide a layer of high-resistance film between the upper substrate and the upper polarizer, and then use conductive silver paste to electrically connect the high-resistance film to the grounding terminal on the lower substrate, so as to transfer the static electricity generated by the upper substrate and the upper polarizer to the grounding terminal of the lower substrate through the high-resistance film and the conductive silver paste for ground release.

[0004] However, the high-resistance film is a transparent conductive material such as ITO, AZO or TCO, and is formed on the surface of the upper substrate by magnetron sputtering. The coating yield of magnetron sputtering is relatively low, and the bonding force between the high-resistance film and the upper substrate is large. Once the coating is defective, it is difficult to peel off the high-resistance film on the surface of the upper substrate, and the difficulty of re-coating is extremely high. This means that once the coating is defective, the entire upper substrate has to be scrapped, and the defective cost is relatively high. Content of the Utility Model

[0005] In order to solve the above-mentioned deficiencies of the prior art, the utility model provides a liquid crystal display screen, which can reduce the difficulty of recycling the upper substrate.

[0006] The utility model provides a display module, including the above-mentioned liquid crystal display screen.

[0007] The technical problems to be solved by the utility model are realized through the following technical solutions:

[0008] A liquid crystal display screen includes an upper substrate and a lower substrate arranged opposite to each other, and

[0009] an upper polarizer, which has a voltage-sensitive adhesive and is attached to the surface of the upper substrate far from the lower substrate through the voltage-sensitive adhesive;

[0010] Conductive carbon paste ink is arranged on the surface of the upper substrate close to the upper polarizer, and is located in the peripheral area of the upper substrate and in contact with the voltage-sensitive adhesive, and extends outside the upper polarizer to form an extended part;

[0011] A conductive part, one end of which is electrically connected to the conductive carbon paste ink from the extended part of the upper polarizer, and the other end is electrically connected to the grounding terminal of the lower substrate.

[0012] Furthermore, the thickness of the conductive carbon paste ink is 3 - 8 μm.

[0013] Furthermore, the impedance of the conductive pressure - sensitive adhesive is 1×10 8 ~9×10 8 Ω.

[0014] Furthermore, the conductive part is an L - shaped structure, having a connected long side and short side. The long side of the conductive part is electrically connected to the conductive carbon paste ink, and the short side of the conductive part is electrically connected to the grounding terminal.

[0015] Furthermore, the conductive part is conductive silver paste, conductive tape, conductive copper foil or conductive double - sided adhesive.

[0016] Furthermore, the upper polarizer further includes a first tri - acetate cellulose film, a polyvinyl alcohol film and a second tri - acetate cellulose film. The first tri - acetate cellulose film and the second tri - acetate cellulose film are respectively disposed on both side surfaces of the polyvinyl alcohol film, and the conductive pressure - sensitive adhesive is disposed on the side surface of the first tri - acetate cellulose film away from the polyvinyl alcohol film.

[0017] Furthermore, the grounding terminal is disposed on the side surface of the lower substrate close to the upper substrate.

[0018] Furthermore, one side of the lower substrate extends outside the upper substrate to form a substrate extended part, and the grounding terminal is disposed on the substrate extended part of the lower substrate.

[0019] Furthermore, the liquid crystal display screen further includes a lower polarizer, and the lower polarizer is attached to the side surface of the lower substrate away from the upper substrate.

[0020] A display module, including a backlight module and the above - mentioned liquid crystal display screen, and the liquid crystal display screen is disposed on the light - emitting side of the backlight module.

[0021] The utility model has the following beneficial effects: The liquid crystal display screen of the utility model combines the conductive pressure-sensitive adhesive and the conductive carbon paste ink to realize the function of static electricity collection and conduction on the upper surface of the display screen. The conductive pressure-sensitive adhesive is not only used for bonding between the upper polarizer and the upper substrate, but also used for collecting static electricity generated by the upper polarizer and the upper substrate. The conductive carbon paste ink is used for electrically connecting the conductive pressure-sensitive adhesive and the conductive part to conduct the static electricity collected by the conductive pressure-sensitive adhesive to the conductive part, and further conduct the static electricity to the grounding terminal of the lower substrate through the conductive part for grounding treatment. Compared with the high-resistance film of the prior art, the conductive carbon paste ink is formed on the surface of the upper substrate through a printing process and adheres to the upper substrate after the ink is cured, and the bonding force between the conductive carbon paste ink and the upper substrate is small. When printing defects occur, the conductive carbon paste ink can be wiped off the upper substrate with cloth or the like before the ink is cured, so as to facilitate reprinting the conductive carbon paste ink on the upper substrate, reducing the difficulty of recycling the upper substrate. Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the stacked structure of the liquid crystal display screen provided by the utility model.

[0023] Figure 2 It is a schematic diagram of the front structure of the liquid crystal display screen provided by the utility model.

[0024] Figure 3 It is a schematic diagram of the stacked structure of the upper polarizer in the liquid crystal display screen provided by the utility model. Detailed Embodiments

[0025] The following describes the utility model in detail with reference to the drawings and embodiments. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the utility model, but should not be construed as limiting the utility model.

[0026] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the utility model.

[0027] In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", and "third" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0028] In the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", "set", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may also be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] Embodiment 1

[0030] As Figure 1 and 2 shown, a liquid crystal display screen includes an upper substrate 10 and a lower substrate 20 which are oppositely arranged, as well as an upper polarizer 30 and a lower polarizer 40. The upper polarizer 30 is attached to one side surface of the upper substrate 10 away from the lower substrate 20, and the lower polarizer 40 is attached to one side surface of the lower substrate 20 away from the upper substrate 10; the lower substrate 20 includes a substrate stacked portion 21 and a substrate extended portion 5122. The substrate stacked portion 21 is stacked and attached to the upper substrate 10 relatively, and the substrate extended area is formed by extending from one side of the lower substrate 20 to outside the upper substrate 10; a grounding terminal 23 is provided on the substrate extended area of the lower substrate 20, and the grounding terminal 23 is provided on one side surface of the lower substrate 20 close to the upper substrate 10.

[0031] Both the substrate stacked portion 21 of the upper substrate 10 and the lower substrate 20 include a display area and a peripheral area. The peripheral area surrounds the display area. The display area is used for display, and the peripheral area is used for routing and gluing; both the upper polarizer 30 and the lower polarizer 40 at least cover the display area.

[0032] The liquid crystal display screen further includes a conductive carbon paste ink 50 and a conductive part 60.

[0033] The upper polarizer 30 has a voltage-sensitive conductive adhesive 31 and is attached to one side surface of the upper substrate 10 away from the lower substrate 20 through the voltage-sensitive conductive adhesive 31.

[0034] The conductive carbon paste ink 50 is disposed on one surface of the upper substrate 10 close to the upper polarizer 30, and is located within the peripheral area of the upper substrate 10 in contact with the voltage-sensitive adhesive 31, and extends outside the upper polarizer 30 to form an extended portion 51;

[0035] One end of the conductive portion 60 is electrically connected to the extended portion 51 of the conductive carbon paste ink 50 from the upper polarizer 30, and the other end is electrically connected to the ground terminal 23 of the lower substrate 20.

[0036] The liquid crystal display screen of the present invention combines the voltage-sensitive adhesive 31 and the conductive carbon paste ink 50 to achieve the function of static electricity collection and conduction on the upper surface of the display screen. The voltage-sensitive adhesive 31 is not only used for bonding between the upper polarizer 30 and the upper substrate 10, but also for collecting static electricity generated by the upper polarizer 30 and the upper substrate 10. The conductive carbon paste ink 50 is used to electrically connect the voltage-sensitive adhesive 31 and the conductive portion 60 to conduct the static electricity collected by the voltage-sensitive adhesive 31 to the conductive portion 60, and further conduct the static electricity to the ground terminal 23 of the lower substrate 20 through the conductive portion 60 for grounding treatment; compared with the high-resistance film of the prior art, the conductive carbon paste ink 50 is formed on the surface of the upper substrate 10 by a printing process and adheres to the upper substrate 10 after the ink is cured, and the bonding force with the upper substrate 10 is small. When printing defects occur, the conductive carbon paste ink 50 can be wiped off the upper substrate 10 with a cloth or the like before the ink is cured, so as to facilitate reprinting the conductive carbon paste ink 50 on the upper substrate 10, reducing the difficulty of recycling the upper substrate 10.

[0037] The conductive carbon paste ink is a special printing ink, which is mainly formed by mixing conductive fillers, binders, solvents, additives, etc. in a predetermined proportion; among them, the conductive fillers can be but are not limited to conductive carbon black, graphite, etc., and these materials have good electrical conductivity and are the main source of the electrical conductivity of the ink; the binders can be but are not limited to epoxy resins, acrylic resins, etc., and are used to bond the conductive fillers together and adhere to the upper substrate 10; the solvent is used to dissolve the binder and other additives to adjust the fluidity and viscosity of the ink; the additives include at least one of dispersants, defoamers, corrosion inhibitors, etc., and are used to improve the dispersibility, stability and printing performance of the ink. Since the conductive carbon paste ink contains conductive fillers, the conductive carbon paste ink can endow the upper substrate 10 with electrical conductivity, enabling it to conduct current or eliminate static electricity. The binder in the conductive carbon paste ink can firmly adhere to the surface of the upper substrate 10 and is not easy to fall off. The conductive carbon paste ink is suitable for various printing methods, such as being formed on the upper surface of the upper substrate 10 by printing processes such as screen printing, relief printing, flexographic printing, etc.

[0038] In this embodiment, the thickness of the conductive carbon paste ink 50 is 3 - 8 μm.

[0039] The voltage - sensitive conductive adhesive 31 is a special functional adhesive. It not only has good bonding performance but also has conductivity. It is usually composed of a pressure - sensitive adhesive substrate and conductive fillers, and the conductivity is achieved by adding conductive materials such as silver powder, copper powder, carbon black, etc. into the pressure - sensitive adhesive substrate. The conductivity of the voltage - sensitive conductive adhesive 31 can be adjusted by adjusting the type and content of the fillers to meet the requirements of different application scenarios.

[0040] In this embodiment, the impedance of the voltage - sensitive conductive adhesive 31 is 1×10 8 ~9×10 8 Ω.

[0041] As Figure 3 shown, the upper polarizer 30 further includes a first cellulose triacetate film 32, a polyvinyl alcohol film 33, and a second cellulose triacetate film 34. The first cellulose triacetate film 32 and the second cellulose triacetate film 34 are respectively disposed on both side surfaces of the polyvinyl alcohol film 33, and the voltage - sensitive conductive adhesive 31 is disposed on the side surface of the first cellulose triacetate film 32 away from the polyvinyl alcohol film 33.

[0042] In this embodiment, the lower polarizer 40 can be attached to the side surface of the lower substrate 20 away from the upper substrate 10 through a common insulating pressure - sensitive adhesive.

[0043] Except for the different types of pressure - sensitive adhesives, the other film layer structures of the lower polarizer 40 are the same as those of the upper polarizer 30, that is, the lower polarizer 40 also adopts a sandwich structure with a polyvinyl alcohol film 33 sandwiched between two cellulose triacetate films.

[0044] In order to effectively increase the contact area with the conductive carbon paste ink, reduce the conduction resistance, and improve the anti - static performance, preferably, the conductive part 60 is an L - shaped structure, having a long side 61 and a short side 62 connected to each other. The long side 61 of the conductive part 60 is electrically connected to the conductive carbon paste ink 50, and the short side 62 of the conductive part 60 is electrically connected to the grounding terminal 23.

[0045] In this embodiment, the conductive part 60 can be, but is not limited to, conductive silver paste, conductive adhesive tape, conductive copper foil, or conductive double - sided tape.

[0046] Embodiment Two

[0047] A display module includes a backlight module and the liquid crystal display screen described in Embodiment One, and the liquid crystal display screen is disposed on the light - emitting side of the backlight module.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention rather than to limit them. Although the embodiments of the present invention have been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the embodiments of the present invention can still be modified or equivalently replaced, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A liquid crystal display screen, characterized in that: It includes an upper substrate and a lower substrate which are arranged opposite to each other, and An upper polarizer having a conductive pressure-sensitive adhesive and attached to a surface of the upper substrate away from the lower substrate through the conductive pressure-sensitive adhesive; Conductive carbon paste ink is disposed on a side surface of the upper substrate close to the upper polarizer, is located in the peripheral area of ​​the upper substrate and contacts the conductive pressure-sensitive adhesive, and extends outside the upper polarizer to form an extension portion; The conductive part has one end electrically connected to the conductive carbon paste ink extending from the extension of the upper polarizer, and the other end electrically connected to the ground terminal of the lower substrate.

2. The liquid crystal display screen according to claim 1, characterized in that: The thickness of the conductive carbon paste ink is 3-8 μm.

3. The liquid crystal display according to claim 1 or 2, characterized in that: The impedance of the conductive pressure sensitive adhesive is 1×10 8 ~9×10 8 Ω.

4. The liquid crystal display screen according to claim 1, characterized in that: The conductive part is an L-shaped structure having a long side and a short side connected to each other. The long side of the conductive part is electrically connected to the conductive carbon paste ink, and the short side of the conductive part is electrically connected to the ground terminal.

5. The liquid crystal display according to claim 1 or 4, characterized in that: The conductive part is conductive silver paste, conductive adhesive tape, conductive copper foil or conductive double-sided adhesive.

6. The liquid crystal display screen according to claim 1, characterized in that: The upper polarizer also includes a first triacetyl cellulose film, a polyvinyl alcohol film and a second triacetyl cellulose film, wherein the first triacetyl cellulose film and the second triacetyl cellulose film are respectively arranged on both side surfaces of the polyvinyl alcohol film, and the conductive pressure-sensitive adhesive is arranged on a side surface of the first triacetyl cellulose film away from the polyvinyl alcohol film.

7. The liquid crystal display screen according to claim 1, characterized in that: The ground terminal is arranged on a surface of the lower substrate close to the upper substrate.

8. The liquid crystal display according to claim 1 or 7, characterized in that: One side of the lower substrate extends outside the upper substrate to form a substrate extension portion, and the ground terminal is arranged on the substrate extension portion of the lower substrate.

9. The liquid crystal display screen according to claim 1, characterized in that: The liquid crystal display screen further comprises a lower polarizer, and the lower polarizer is attached to a surface of the lower substrate on a side away from the upper substrate.

10. A display module, characterized in that: It comprises a backlight module and the liquid crystal display screen as claimed in claim 1, wherein the liquid crystal display screen is arranged on the light emitting side of the backlight module.

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