Anti-static TN-TFT display screen

Abstract

The utility model discloses an anti-static TN-TFT display screen which comprises a lower polaroid, a lower substrate, a liquid crystal layer, an upper substrate, an upper polaroid and a cover plate which are sequentially arranged in an overlapped mode from bottom to top, the lower substrate is longer than the upper substrate and extends outwards to form a step, sealing frame glue is arranged between the lower substrate and the upper substrate, and the liquid crystal layer is arranged between the upper polaroid and the lower substrate. A first ITO layer is arranged on the upper surface of the lower substrate, a second ITO layer is arranged on the lower surface of the upper substrate, a third ITO layer is arranged on the upper surface of the upper substrate, a driving IC and an FPC are bound on the upper surface of the lower substrate located at the step, conductive silver paste is arranged on the third ITO layer, and the conductive silver paste is arranged on the lower surface of the lower substrate. The conductive silver paste extends to the side edge of the upper substrate, the side edge of the sealing frame glue and the upper surface of the lower substrate. Static electricity on the outer side of the liquid crystal display screen can be effectively led out, damage to the liquid crystal display screen due to static electricity accumulation outside the liquid crystal display screen is avoided, and product competitiveness is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal display, and more specifically to an anti-static TN-TFT display screen. Background Art

[0002] Conventional TFT LCD screens are divided into TN-TFT and IPS-TFT. TN-TFT displays in a normally white state, which is what the industry calls a normally white screen. Currently, this type of screen is coated with an ITO conductive film on the upper substrate toward the inner side of the LCD box, and this structure is used to control the LCD flipping of the screen. However, the ITO of this structure is all on the inner side of the LCD box, which cannot shield the static electricity on the outside of the LCD screen. Therefore, static electricity outside the LCD screen is easily accumulated and damages the LCD screen. Utility Model Content

[0003] The technical problem to be solved by the utility model is how to guide the static electricity outside the TN-TFT display screen to avoid the static electricity from damaging the liquid crystal display screen.

[0004] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0005] To solve the above technical problems, the utility model provides an anti-static TN-TFT display screen, which includes a lower polarizer, a lower substrate, a liquid crystal layer, an upper substrate, an upper polarizer and a cover plate which are stacked in sequence from bottom to top, the lower substrate being longer than the upper substrate and extending outward to form a step, a sealing frame glue is arranged between the lower substrate and the upper substrate, a first ITO layer is arranged on the upper surface of the lower substrate, a second ITO layer is arranged on the lower surface of the upper substrate, a third ITO layer is arranged on the upper surface of the upper substrate, a driver IC and an FPC are bound to the upper surface of the lower substrate located at the step, a conductive silver paste is arranged on the third ITO layer, and the conductive silver paste extends to the side of the upper substrate, the side of the sealing frame glue and the upper surface of the lower substrate.

[0006] As a preferred embodiment of the antistatic TN-TFT display screen provided by the utility model, the FPC includes a substrate layer, a circuit layer arranged on the upper surface of the substrate layer, and a metal heat dissipation layer arranged on the lower surface of the substrate layer.

[0007] As a preferred embodiment of the anti-static TN-TFT display screen provided by the utility model, the FPC also includes at least one through-hole penetrating the substrate layer, the circuit layer and the metal heat dissipation layer, and the inner wall of the through-hole is provided with a thermal conductive layer in contact with the circuit layer and the metal heat dissipation layer.

[0008] As a preferred implementation of the antistatic TN-TFT display screen provided by the utility model, a heat conductor connected to an external heat conducting structure is arranged in the perforation, and the heat conductor is in contact with the heat conducting layer.

[0009] As a preferred implementation of the antistatic TN-TFT display screen provided by the utility model, the structure of the metal heat dissipation layer is a mesh structure, a strip structure, a wavy structure or a honeycomb structure.

[0010] As a preferred implementation of the antistatic TN-TFT display screen provided by the utility model, a plurality of grooves are formed on the upper surface of the cover plate by etching, and a plastic layer is covered on the upper side of the cover plate, and the plastic layer is embedded in the plurality of grooves.

[0011] As a preferred implementation of the antistatic TN-TFT display screen provided by the utility model, the shape of the groove is square or circular.

[0012] As a preferred implementation of the antistatic TN-TFT display screen provided by the utility model, the groove is a closing groove which is narrow outside and wide inside.

[0013] As a preferred implementation of the antistatic TN-TFT display screen provided by the utility model, the cross-sectional shape of the groove is an isosceles trapezoid.

[0014] As a preferred implementation of the antistatic TN-TFT display screen provided by the utility model, the groove is in the shape of a long strip.

[0015] The utility model has the following beneficial effects:

[0016] Since a third ITO layer is added to the upper surface of the upper substrate, and the third ITO layer is provided with conductive silver paste, the conductive silver paste is led out from the third ITO layer to the side of the upper substrate, the side and the upper surface of the sealing frame glue, and finally to the FPC. The static electricity is led out through the FPC, which can effectively lead out the static electricity on the outside of the LCD screen, avoid the accumulation of static electricity outside the LCD screen and damage the LCD screen, and improve the competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the scheme in the present application, 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 present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1The utility model provides a schematic structural diagram of an anti-static TN-TFT display screen.

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of FPC.

[0020] Figure 3 for Figure 1 Schematic diagram of the improved structure at the middle cover.

[0021] Figure 4 for Figure 3 Schematic diagram of the decomposition structure.

[0022] Figure 5 for Figure 3 Schematic diagram of the improved structure of the middle cover.

[0023] Description of Figure Numbers:

[0024] Lower substrate 1; liquid crystal layer 2; upper substrate 3; cover plate 4; sealing frame glue 31; first ITO layer 11; second ITO layer 31; third ITO layer 32; FPC 5; conductive silver paste 6;

[0025] Base material layer 51; circuit layer 52; metal heat dissipation layer 53; through hole 54;

[0026] Plastic layer 7; groove 41. DETAILED DESCRIPTION

[0027] 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.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] The utility model provides an anti-static TN-TFT display screen, which comprises a lower polarizer, a lower substrate, a liquid crystal layer, an upper substrate, an upper polarizer and a cover plate which are sequentially stacked from bottom to top, wherein the lower substrate is longer than the upper substrate and extends outward to form a step, a sealing frame glue is arranged between the lower substrate and the upper substrate, a first ITO layer is arranged on the upper surface of the lower substrate, a second ITO layer is arranged on the lower surface of the upper substrate, a third ITO layer is arranged on the upper surface of the upper substrate, a driving IC and an FPC are bound to the upper surface of the lower substrate located at the step, a conductive silver paste is arranged on the third ITO layer, and the conductive silver paste extends to the side of the upper substrate, the side of the sealing frame glue and the upper surface of the lower substrate.

[0031] Since a third ITO layer is added to the upper surface of the upper substrate, and the third ITO layer is provided with conductive silver paste, the conductive silver paste is led out from the third ITO layer to the side of the upper substrate, the side and the upper surface of the sealing frame glue, and finally to the FPC. The static electricity is led out through the FPC, which can effectively lead out the static electricity on the outside of the LCD screen, avoid the accumulation of static electricity outside the LCD screen and damage the LCD screen, and improve the competitiveness of the product.

[0032] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention.

[0033] Example 1, please refer to Figure 1, an anti-static TN-TFT display screen provided by the utility model, comprising a lower polarizer, a lower substrate 1, a liquid crystal layer 2, an upper substrate 3, an upper polarizer and a cover plate 4 which are sequentially stacked from bottom to top, the lower substrate 1 is longer than the upper substrate 3 and extends outward to form a step, a sealing frame glue 31 is arranged between the lower substrate 1 and the upper substrate 3, a first ITO layer 11 is arranged on the upper surface of the lower substrate 1, a second ITO layer 31 is arranged on the lower surface of the upper substrate 3, a third ITO layer 32 is arranged on the upper surface of the upper substrate 3, a driver IC and an FPC 5 are bound to the upper surface of the lower substrate 1 located at the step, a conductive silver paste 6 is arranged on the third ITO layer 32, and the conductive silver paste 6 extends to the side of the upper substrate 3, the side of the sealing frame glue 31 and the upper surface of the lower substrate 1. Since a third ITO layer 32 is added to the upper surface of the upper substrate 3, and the third ITO layer 32 is provided with a conductive silver paste 6, the conductive silver paste 6 is led out from the third ITO layer 32 to the side of the upper substrate 3, the side and the upper surface of the sealing frame glue 31, and finally to the FPC5. The static electricity is led out through the FPC5, which can effectively lead out the static electricity outside the LCD screen, avoid the accumulation of static electricity outside the LCD screen and damage the LCD screen, and improve the competitiveness of the product.

[0034] Example 2, please refer to Figure 2 As a further optimization scheme of Example 1, in this embodiment, the FPC5 includes a substrate layer 51, a circuit layer 52 arranged on the upper surface of the substrate layer 51, and a metal heat dissipation layer 53 arranged on the lower surface of the substrate layer 51. The arrangement method can be that the circuit layer 52 and the metal heat dissipation layer 53 are respectively attached to the substrate layer 51 by double-sided adhesive. Since the thickness of the substrate layer 51 is relatively thin, the heat on the FPC5 can be diffused to the metal heat dissipation layer 53 through the substrate layer 51. The metal heat dissipation layer 53 can effectively increase the heat dissipation area of ​​the FPC5 and play a role in uniform heat dissipation, thereby improving the heat dissipation efficiency of the FPC5. The substrate layer 51 can be any one of polyimide, polyester, polysulfone or polytetrafluoroethylene, the double-sided adhesive is any one of an acrylic adhesive layer or an epoxy resin adhesive layer, and the metal heat dissipation layer 53 can be a copper foil layer.

[0035] Furthermore, the FPC 5 further includes at least one through-hole 54 penetrating the substrate layer 51, the circuit layer 52 and the metal heat dissipation layer 53, and the inner wall of the through-hole 54 is provided with a heat-conducting layer in contact with the circuit layer 52 and the metal heat dissipation layer 53. By utilizing the good thermal conductivity of the through-hole 54, the circuit layer 52 and the metal heat dissipation layer 53 on both sides of the substrate layer 51 can be electrically connected to play a good thermal conductivity function, and the thermal conductive layer can provide a thermal conductive function to achieve a good heat dissipation effect. Among them, the thermal conductive layer can be a copper glue conductive ink layer.

[0036] Furthermore, a heat conductor connected to an external heat-conducting structure is disposed in the through hole 54. The heat conductor is connected to the external heat-conducting structure from one side of the circuit layer 52 and is also in contact with the heat-conducting layer in the through hole 54, so that the circuit layer 52 and the metal heat dissipation layer 53 can be connected to the external heat-conducting structure through the through hole 54, so that the heat in the FPC 5 is diffused to the external heat-conducting structure through the heat conductor in the through hole 54, so as to further improve the heat dissipation efficiency of the FPC 5. Preferably, in order to enable the through hole 54 to be connected to the external heat-conducting structure, the through hole 54 is disposed at the edge of the FPC 5.

[0037] Furthermore, the metal heat dissipation layer 53 is a uniform heat dissipation structure, and its structure can be any one of a mesh structure, a strip structure, a wavy structure or a honeycomb structure. Through the uniform heat dissipation structure, the heat dissipation effect can be better improved.

[0038] Example 3, please refer to Figures 3 to 5 As a further optimization scheme of Example 1, in this embodiment, the upper surface of the cover plate 4 is covered with a plastic layer 7, and a plurality of grooves 41 are formed downward on the upper surface of the cover plate 4 by etching, and a portion of the lower surface of the plastic layer 7 is embedded in each groove 41. Since the surface of the groove 41 formed by etching has a certain degree of roughness, the plastic layer 7 can be tightly bonded to the groove 41 to prevent the cover plate 4 and the plastic layer 7 from falling off. Since the upper part of the cover plate 4 is covered with a plastic layer 7, and a plurality of grooves 41 are formed on the upper surface of the cover plate 4 by etching, and the plastic layer 7 can be embedded in the interior of the plurality of grooves 41, the grooves 41 formed by etching make the inner surface of the grooves 41 have a certain degree of roughness, and the surface of the grooves 41 with a certain degree of roughness can improve the bonding force between the grooves 41 and the plastic layer 7, thereby reducing the possibility of separation of the grooves 41 and the plastic layer 7. When the LCD screen is hit or falls, the plastic layer 7 on the upper surface of the cover plate 4 can directly withstand the external force, thereby preventing the external force from directly acting on the cover plate 4. Since the plastic layer 7 can absorb most of the energy, the remaining external force is very weak when it acts on the cover plate 4, thereby effectively reducing the risk of the cover plate 4 being broken or damaged; and when the LCD screen is subjected to external force, even if the external force is large, it will only damage the plastic layer 7 on the upper surface of the cover plate 4, and will not directly damage the cover plate 4. Therefore, it can be avoided that the cover plate 4 is damaged and the LCD screen cannot be used normally, which brings a better user experience to the user and improves the anti-fall ability of the LCD screen.

[0039] Furthermore, the shape of the groove 41 can be square or circular, and the cross-sectional shape of the groove 41 can be a closing groove that is narrow on the outside and wide on the inside. In the present embodiment, the cross-sectional shape of the groove 41 is an isosceles trapezoid, and the groove 41 is in the shape of an elongated strip. The isosceles trapezoid-shaped groove 41 can allow the plastic layer 7 to be tightly embedded in the groove 41, thereby preventing the groove 41 from separating from the plastic layer 7, thereby preventing the cover plate 4 from falling off from the plastic layer 7. The elongated groove 41 can increase the fitting portion between the plastic layer 7 and the groove 41, thereby increasing the fitting strength between the groove 41 and the plastic layer 7.

[0040] 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.

[0041] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application 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 present application more thorough and comprehensive. Although the present application 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 perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. An anti-static TN-TFT display screen, characterized in that: It includes a lower polarizer, a lower substrate, a liquid crystal layer, an upper substrate, an upper polarizer and a cover plate which are stacked in sequence from bottom to top, the lower substrate is longer than the upper substrate and extends outward to form a step, a sealing frame glue is arranged between the lower substrate and the upper substrate, the upper surface of the lower substrate is provided with a first ITO layer, the lower surface of the upper substrate is provided with a second ITO layer, the upper surface of the upper substrate is provided with a third ITO layer, the upper surface of the lower substrate located at the step is provided with a driver IC and an FPC bound thereto, the third ITO layer is provided with a conductive silver paste, and the conductive silver paste extends to the side of the upper substrate, the side of the sealing frame glue and the upper surface of the lower substrate.

2. The antistatic TN-TFT display screen according to claim 1, characterized in that: The FPC includes a substrate layer, a circuit layer disposed on an upper surface of the substrate layer, and a metal heat dissipation layer disposed on a lower surface of the substrate layer.

3. The antistatic TN-TFT display screen according to claim 2, characterized in that: The FPC further includes at least one through-hole penetrating the substrate layer, the circuit layer and the metal heat dissipation layer, and an inner wall of the through-hole is provided with a heat-conducting layer in contact with the circuit layer and the metal heat dissipation layer.

4. The antistatic TN-TFT display screen according to claim 3, characterized in that: A heat conductor connected to an external heat-conducting structure is arranged in the through hole, and the heat conductor is in contact with the heat-conducting layer.

5. The antistatic TN-TFT display screen according to claim 2, characterized in that: The structure of the metal heat dissipation layer is a mesh structure, a strip structure, a wave structure or a honeycomb structure.

6. The antistatic TN-TFT display screen according to claim 1, characterized in that: A plurality of grooves are formed on the upper surface of the cover plate by etching, and a plastic layer is covered on the upper side of the cover plate, and the plastic layer is embedded in the plurality of grooves.

7. The antistatic TN-TFT display screen according to claim 6, characterized in that: The shape of the groove is square or circular.

8. The antistatic TN-TFT display screen according to claim 6, characterized in that: The groove is a closing groove which is narrow outside and wide inside.

9. The antistatic TN-TFT display screen according to claim 8, characterized in that: The cross-sectional shape of the groove is an isosceles trapezoid.

10. The antistatic TN-TFT display screen according to claim 6, characterized in that: The groove is in the shape of an elongated strip.

Images