Liquid crystal display screen capable of increasing flexibility of FPC (Flexible Printed Circuit) bending area

Abstract

The utility model discloses a liquid crystal display screen capable of increasing the flexibility of a flexible printed circuit (FPC) bending area, which comprises a lower polaroid, an array substrate, a color film substrate, an upper polaroid and a cover plate which are sequentially overlapped from bottom to top, and the array substrate is longer than the color film substrate and extends outwards to form a step. A step is arranged on the upper surface of the array substrate, a driving IC (integrated circuit) and an FPC (flexible printed circuit) are bound on the upper surface of the array substrate positioned at the step, the FPC comprises a binding area, a bending area and a connecting area which are sequentially connected, a copper layer in the bending area positioned at the joint of the bending area and the binding area is grid copper, and two reinforcing plates which are arranged in a staggered manner are arranged on two sides of the connecting area. Since the copper layer in the bending area at the joint of the bending area and the binding area is grid copper, compared with a full copper laying mode in a traditional scheme, the flexibility is higher, the bending capability is stronger, and the bending area of the FPC cannot be broken even if the bending radian is larger.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal display, and more specifically to a liquid crystal display screen with increased softness of a FPC bending zone. Background Art

[0002] LCD screens are usually bound with display FPCs. Like backlight FPCs, display FPCs need to be bent onto the mainboard for electrical connection. However, since LCD screens are generally small in size, the display FPC has a larger bending arc, which is a great test for the bending ability of the display FPC. In traditional LCD screens, the display FPC often breaks in the bending area, resulting in the LCD screen being unable to display normally. The number of defective LCD screens increases, reducing the competitiveness of the product. Utility Model Content

[0003] The technical problem to be solved by the utility model is how to improve the softness of the bending area of ​​the FPC to avoid the fracture of the bending area of ​​the FPC.

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

[0005] In order to solve the above technical problems, the utility model provides a liquid crystal display screen with increased softness of an FPC bending zone, which includes a lower polarizer, an array substrate, a color filter substrate, an upper polarizer and a cover plate which are stacked in sequence from bottom to top, the array substrate is longer than the color filter substrate and extends outward to form a step, the upper surface of the array substrate located at the step is bound with a driver IC and an FPC, the FPC includes a binding zone, a bending zone and a connecting zone which are connected in sequence, the copper layer in the bending zone located at the connection between the bending zone and the binding zone is grid copper, and two reinforcing plates which are staggered are provided on both sides of the connecting zone.

[0006] As a preferred implementation of the liquid crystal display screen with increased flexibility of the FPC bending zone provided by the utility model, the widths of the two reinforcing plates are different.

[0007] As a preferred implementation of the liquid crystal display screen with increased flexibility of the FPC bending zone provided by the utility model, the material of the reinforcement plate is FR4, PI or stainless steel.

[0008] As a preferred implementation of the liquid crystal display screen with increased softness of the FPC bending zone provided by the utility model, the outer surfaces of the two reinforcing plates are both provided with a surface treatment layer for increasing the surface roughness.

[0009] As a preferred implementation of the liquid crystal display screen with increased softness of the FPC bending zone provided by the utility model, the surface treatment layer is diamond knurling.

[0010] As a preferred embodiment of the liquid crystal display screen with increased softness of the FPC bending zone 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 liquid crystal display screen with increased softness of the FPC bending zone provided by the utility model, the shape of the groove is square or circular.

[0012] As a preferred implementation of the liquid crystal display screen with increased softness of the FPC bending zone provided by the utility model, the groove is a closing groove that is narrow on the outside and wide on the inside.

[0013] As a preferred implementation of the liquid crystal display screen with increased softness of the FPC bending zone provided by the utility model, the cross-sectional shape of the groove is an isosceles trapezoid.

[0014] As a preferred implementation of the liquid crystal display screen with increased softness of the FPC bending zone 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 the copper layer in the bending area at the connection between the bending area and the binding area is grid copper, compared with the full copper cladding method in the traditional solution, it is more flexible and has a stronger bending ability. Even if the bending curvature is large, the bending area of ​​the FPC will not break, thereby ensuring the normal display of the LCD screen, reducing the number of defective LCD screens, and improving 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 1 The utility model provides a structural schematic diagram of a liquid crystal display screen that increases the softness of the FPC bending zone.

[0019] Figure 2 for Figure 1 A top view of the array substrate and the color filter substrate.

[0020] Figure 3 for Figure 1 Schematic diagram of the structure of FPC.

[0021] Figure 4 This is a schematic diagram of the structure of Example 2.

[0022] Figure 5 for Figure 4 Schematic diagram of the decomposition structure.

[0023] Figure 6 for Figure 4 Schematic diagram of the improved structure.

[0024] Description of Figure Numbers:

[0025] Lower polarizer 1; array substrate 2; color filter substrate 3; upper polarizer 4; cover plate 5; driver IC 6; FPC 7; binding area 71; bending area 72; connection area 73; reinforcement plate 74;

[0026] Plastic layer 8; groove 51. 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 a liquid crystal display screen with increased softness of an FPC bending zone, comprising a lower polarizer, an array substrate, a color film substrate, an upper polarizer and a cover plate which are sequentially stacked from bottom to top, wherein the array substrate is longer than the color film substrate and extends outward to form a step, a driver IC and an FPC are bound to the upper surface of the array substrate located at the step, the FPC comprises a binding zone, a bending zone and a connecting zone which are sequentially connected, a copper layer in the bending zone at the connection between the bending zone and the binding zone is grid copper, and two reinforcing plates which are staggered are provided on both sides of the connecting zone.

[0031] Since the copper layer in the bending area at the connection between the bending area and the binding area is grid copper, compared with the full copper cladding method in the traditional solution, it is more flexible and has a stronger bending ability. Even if the bending curvature is large, the bending area of ​​the FPC will not break, thereby ensuring the normal display of the LCD screen, reducing the number of defective LCD screens, and improving 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

[0034] See also Figures 1 to 3, a liquid crystal display screen with increased softness of the FPC bending zone 2 provided by the utility model, comprising a lower polarizer 1, an array substrate 2, a color filter substrate 3, an upper polarizer 4 and a cover plate 5 which are sequentially stacked from bottom to top, the array substrate 2 being longer than the color filter substrate 3 and extending outward to form a step, a driver IC 6 and an FPC 7 being bound to the upper surface of the array substrate 2 located at the step, the FPC 7 comprising a binding area 71, a bending area 72 and a connecting area 73 which are sequentially connected, the copper layer in the bending area 72 located at the connection between the bending area 72 and the binding area 71 is a mesh copper, and two reinforcing plates 74 which are staggered are arranged on both sides of the connecting area 73. Since the copper layer in the bending area 72 is a mesh copper, it has higher softness and stronger bending ability than the full copper paving method in the traditional solution, and the bending area 72 of the FPC 7 will not break even if the bending arc is large, thereby ensuring the normal display of the liquid crystal display screen, reducing the number of defective products of the liquid crystal display screen, and improving the competitiveness of the product.

[0035] Two reinforcing plates 74 are provided on both sides of the connection area 73 and are staggered with each other. In the traditional FPC7 design, reinforcing plates 74 are usually not provided or are provided at the same position and have the same width, resulting in the pressure applied being concentrated on the same straight line when plugging and unplugging the FPC7, causing a slight break in the FPC7 line. The FPC7 provided by the utility model has two reinforcing plates 74 located on both sides of the connection area 73 and staggered with each other. When the FPC7 is pulled out, the pressure applied by the reinforcing plates 74 on both sides to the FPC7 is not on the same line segment, and the stress will not be concentrated on the same straight line when bending, thereby avoiding stress concentration and the problem of easy slight break in the line at the interface end, thereby improving product yield.

[0036] Furthermore, the two reinforcing plates 74 staggered in the present invention may be respectively arranged at two different positions; or the center point may be at the same position, but the widths of the two reinforcing plates 74 are different. As long as the stress of the two reinforcing plates 74 when bent is not concentrated on the same straight line, it can avoid stress concentration and the problem of easy micro-breakage of the line at the interface end, thereby improving the product yield. In this embodiment, the reinforcing plates 74 include a first reinforcing plate 74 and a second reinforcing plate 74, each of which has a different width, and its center point is on the same horizontal line, so that the edges of the reinforcing plates 74 are staggered and not concentrated on the same straight line.

[0037] Furthermore, the material of the reinforcing plate 74 is FR4, PI or stainless steel. In other embodiments, if the heat generated by the FPC 7 is relatively large, a heat dissipation material with better heat dissipation effect, such as an aluminum foil reinforcing plate 74, may also be used.

[0038] Furthermore, the outer surfaces of the first reinforcing plate 74 and the second reinforcing plate 74 are both provided with a surface treatment layer for increasing the surface roughness, so as to increase the friction between the worker and the first reinforcing plate 74 and the second reinforcing plate 74, so that the FPC 7 is easy to pull out.

[0039] Furthermore, the surface treatment layer is provided with diamond knurling on the outer surfaces of the first reinforcement plate 74 and the second reinforcement plate 74, so that the FPC 7 can be pulled out more easily, reducing the risk of the FPC 7 circuit being broken.

[0040] Example 2

[0041] See also Figures 4 to 6 As a further optimization scheme of Example 1, in this embodiment, the upper surface of the cover plate 5 is covered with a plastic layer 8, and a plurality of grooves 51 are formed downward on the upper surface of the cover plate 5 by etching, and a portion of the lower surface of the plastic layer 8 is embedded in each groove 51. Since the surface of the groove 51 formed by etching has a certain degree of roughness, the plastic layer 8 can be tightly bonded to the groove 51 to prevent the cover plate 5 and the plastic layer 8 from falling off. Since the upper part of the cover plate 5 is covered with a plastic layer 8, and a plurality of grooves 51 are formed on the upper surface of the cover plate 5 by etching, and the plastic layer 8 can be embedded in the interior of the plurality of grooves 51, the grooves 51 formed by etching make the inner surface of the grooves 51 have a certain degree of roughness, and the surface of the grooves 51 with a certain degree of roughness can improve the bonding force between the grooves 51 and the plastic layer 8, thereby reducing the possibility of separation of the grooves 51 and the plastic layer 8. When the LCD screen is hit or falls, the plastic layer 8 on the upper surface of the cover plate 5 can directly withstand the external force, thereby preventing the external force from directly acting on the cover plate 5. Since the plastic layer 8 can absorb most of the energy, the remaining external force is very weak when it acts on the cover plate 5, thereby effectively reducing the risk of the cover plate 5 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 8 on the upper surface of the cover plate 5, and will not directly damage the cover plate 5, thereby preventing the cover plate 5 from being damaged and causing the LCD screen to be unable to be used normally, thereby bringing a better user experience to users and improving the anti-fall ability of the LCD screen.

[0042] Furthermore, the shape of the groove 51 can be square or circular, and the cross-sectional shape of the groove 51 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 51 is an isosceles trapezoid, and the groove 51 is in the shape of an elongated strip. The isosceles trapezoid-shaped groove 51 can allow the plastic layer 8 to be tightly embedded in the groove 51, thereby preventing the groove 51 from separating from the plastic layer 8, thereby preventing the cover plate 5 from falling off from the plastic layer 8. The elongated groove 51 can increase the fitting portion between the plastic layer 8 and the groove 51, thereby increasing the fitting strength between the groove 51 and the plastic layer 8.

[0043] 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.

[0044] 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. A liquid crystal display screen with increased softness of the FPC bending zone, characterized in that: It includes a lower polarizer, an array substrate, a color filter substrate, an upper polarizer and a cover plate which are stacked in sequence from bottom to top. The array substrate is longer than the color filter substrate and extends outward to form a step. The upper surface of the array substrate located at the step is bound with a driver IC and an FPC. The FPC includes a binding area, a bending area and a connecting area which are connected in sequence. The copper layer in the bending area at the connection between the bending area and the binding area is grid copper. Two reinforcing plates which are staggered are provided on both sides of the connecting area.

2. The liquid crystal display screen with increased flexibility of the FPC bending zone according to claim 1, characterized in that: The widths of the two reinforcing plates are different.

3. The liquid crystal display screen with increased flexibility of the FPC bending zone according to claim 1, characterized in that: The reinforcement plate is made of FR4, PI or stainless steel.

4. The liquid crystal display screen with increased flexibility of the FPC bending zone according to claim 1, characterized in that: The outer surfaces of the two reinforcing plates are both provided with a surface treatment layer for improving the surface roughness.

5. The liquid crystal display screen with increased flexibility of the FPC bending zone according to claim 4, characterized in that: The surface treatment layer is diamond knurled.

6. The liquid crystal display screen with increased flexibility of the FPC bending zone 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 liquid crystal display screen with increased flexibility of the FPC bending zone according to claim 6, characterized in that: The shape of the groove is square or circular.

8. The liquid crystal display screen with increased flexibility of the FPC bending zone according to claim 6, characterized in that: The groove is a closing groove which is narrow outside and wide inside.

9. The liquid crystal display screen with increased flexibility of the FPC bending zone according to claim 8, characterized in that: The cross-sectional shape of the groove is an isosceles trapezoid.

10. The liquid crystal display screen with increased flexibility of the FPC bending zone according to claim 6, characterized in that: The groove is in the shape of an elongated strip.

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