Liquid crystal display screen capable of improving pasting precision of FPC conductive cloth
By setting copper bit line on the FPC of the LCD screen and calibrating the position of the conductive cloth with high precision of the copper layer, the problem of insufficient pasting accuracy of the FPC conductive cloth is solved, and the effectiveness of electrostatic discharge and the yield of the LCD screen are improved.
Patent Information
- Application Number
- CN202422009140.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-19
AI Technical Summary
The FPC conductive cloth on the LCD screen is insufficiently pasted, resulting in ineffective static discharge, which in turn reduces the yield of the LCD screen.
By setting copper bit lines at the copper layer of the FPC, the position of the conductive cloth is calibrated by using the high accuracy of the copper layer, thereby improving the adhesion accuracy of the FPC conductive cloth.
It improves the adhesion accuracy of the FPC conductive cloth, avoids the problem of ineffective electrostatic discharge, and enhances the structural stability and yield of the LCD screen.
Smart Images
Figure CN222965554U_ABST
Abstract
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 for improving the pasting precision of FPC conductive cloth. Background Art
[0002] The FPC on the liquid crystal display screen generally needs to be pasted with conductive cloth for static electricity release. The conventional method for judging the pasting precision of the conductive cloth is to judge the pasting precision of the conductive cloth through the silk-screened white oil line on the FPC. However, due to the relatively large tolerance of the white oil silk-screened line on the FPC, the tolerance is generally plus or minus 0.3 mm. Such a large tolerance will lead to misjudgment of the position of the conductive cloth, easily cause problems in the structure, and ultimately make the static electricity unable to be effectively released, further causing the liquid crystal display screen to be damaged by static electricity, resulting in a reduction in the yield of the liquid crystal display screen. Summary of the Utility Model
[0003] The technical problem to be solved by the utility model is how to improve the pasting precision of the FPC conductive cloth, avoid misjudgment of the position of the conductive cloth, avoid problems in the product structure, enable effective release of static electricity, and further prevent the liquid crystal display screen from being damaged by static electricity, thereby improving the yield of the liquid crystal display screen.
[0004] The technical problem to be solved by the utility model is realized through the following technical solutions:
[0005] To solve the above technical problem, the utility model provides a liquid crystal display screen for improving the pasting precision of FPC conductive cloth, which includes a lower polarizer, a lower substrate, an upper substrate, and an upper polarizer sequentially stacked from bottom to top. The lower substrate is longer than the upper substrate and extends outward to form a step. A driving IC and an FPC are bonded to the upper surface of the lower substrate at the step. A copper layer is provided inside the FPC, and a conductive cloth is provided on the upper surface of the FPC. Windows are provided on the upper surface of the FPC at the four vertices of the conductive cloth, and copper alignment lines are provided at the copper layers on the FPC at the four windows.
[0006] As a preferred embodiment of the liquid crystal display screen for improving the pasting precision of FPC conductive cloth provided by the utility model, the width of the copper alignment line is 0.3 mm.
[0007] As a preferred embodiment of the liquid crystal display screen for improving the pasting precision of FPC conductive cloth provided by the utility model, the distances between both sides of the copper alignment line and both sides of the window are both 0.3 mm.
[0008] As a preferred embodiment of the liquid crystal display screen for improving the pasting accuracy of the FPC conductive cloth provided by the present utility model, components are provided on the upper surface of the FPC near the conductive cloth, and a reinforcing plate is provided on the lower surface of the FPC at the position of the components.
[0009] As a preferred embodiment of the liquid crystal display screen for improving the pasting accuracy of the FPC conductive cloth provided by the present utility model, the outer edge of the copper alignment line is flush with the outer edge of the conductive cloth.
[0010] As a preferred embodiment of the liquid crystal display screen for improving the pasting accuracy of the FPC conductive cloth provided by the present utility model, the FPC includes a non-bending area and bending areas provided on both sides of the non-bending area. PI reinforcement and a plurality of vias are provided on the bending areas, and the PI reinforcement completely covers the plurality of vias.
[0011] As a preferred embodiment of the liquid crystal display screen for improving the pasting accuracy of the FPC conductive cloth provided by the present utility model, the plurality of vias are arranged in a line segment shape.
[0012] As a preferred embodiment of the liquid crystal display screen for improving the pasting accuracy of the FPC conductive cloth provided by the present utility model, the PI reinforcement is a PI covering film.
[0013] As a preferred embodiment of the liquid crystal display screen for improving the pasting accuracy of the FPC conductive cloth provided by the present utility model, the thickness of the PI covering film is 0.1 mm.
[0014] As a preferred embodiment of the liquid crystal display screen for improving the pasting accuracy of the FPC conductive cloth provided by the present utility model, the PI reinforcement does not extend beyond the non-bending area.
[0015] The present utility model has the following beneficial effects:
[0016] Since the copper layer on the FPC is made by exposure, the accuracy of the copper alignment line and the copper PIN feet for binding positions is high, which is much higher than the accuracy of the white oil silk printing line. Therefore, it can be used for the position control of the conductive cloth. The position of the conductive cloth is calibrated by setting the copper alignment line at the copper layer, so as to improve the pasting accuracy of the FPC conductive cloth, avoid misjudgment of the position of the conductive cloth, avoid problems in the product structure, effectively release static electricity, and further prevent the liquid crystal display screen from being damaged by static electricity, thereby improving the yield of the liquid crystal display screen. Description of the Drawings
[0017] To more clearly illustrate the solutions in this application, the following will briefly introduce the accompanying drawings required in the description of the embodiments. Obviously, the accompanying drawings in the following description are some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.
[0018] Figure 1 Structural schematic diagram of a liquid crystal display screen for improving the sticking accuracy of FPC conductive cloth provided by the present utility model.
[0019] Figure 2 For Figure 1 Structural schematic diagram at the FPC in
[0020] Figure 3 For Figure 2 Enlarged view of part A in
[0021] Figure 4 For Figure 2 Top view of
[0022] Figure 5 For Figure 4 Enlarged view of part B in
[0023] Figure 6 Improved structural schematic diagram of FPC
[0024] Figure 7 For Figure 6 Side view of
[0025] Explanation of reference numerals in the drawings:
[0026] Lower polarizer 1; lower substrate 2; upper substrate 3; upper polarizer 4; driving IC 5; FPC 6; copper layer 61; conductive cloth 7; opening 62; copper alignment line 63;
[0027] Component 8; reinforcing plate 9;
[0028] Non-bending area 601; bending area 602; PI reinforcement 64; via hole 65. Specific embodiments
[0029] To enable those skilled in the art to better understand the solutions of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some, rather than all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present 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. Therefore, it should not be construed as a limitation to the present utility model.
[0031] In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.
[0032] The present utility model provides a liquid crystal display screen for improving the pasting accuracy of the FPC conductive cloth, which includes a lower polarizer, a lower substrate, an upper substrate, and an upper polarizer sequentially stacked from bottom to top. The lower substrate is longer than the upper substrate and extends outward to form a step. A driving IC and an FPC are bonded to the upper surface of the lower substrate at the step. A copper layer is provided in the FPC, and a conductive cloth is provided on the upper surface of the FPC. Windows are provided on the upper surface of the FPC at the four vertices of the conductive cloth, and copper alignment lines are provided at the copper layers on the FPC at the four windows.
[0033] Since the copper layer on the FPC is made by exposure, the accuracy of the copper alignment line and the copper PIN foot of the binding position is high, which is much higher than that of the white oil silk screen printing line. Therefore, it can be used for the position control of the conductive cloth. The position of the conductive cloth is calibrated by setting the copper alignment line at the copper layer, so as to improve the pasting accuracy of the FPC conductive cloth, avoid misjudgment of the position of the conductive cloth, avoid problems in the product structure, effectively release static electricity, and further prevent the liquid crystal display screen from being damaged by static electricity, thereby improving the yield of the liquid crystal display screen.
[0034] To enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings. The following describes the present 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 represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.
[0035] Please refer to Figures 1 to 5 , a liquid crystal display screen for improving the sticking accuracy of the FPC conductive cloth provided by the present utility model, which includes a lower polarizer 1, a lower substrate 2, an upper substrate 3, and an upper polarizer 4 sequentially stacked from bottom to top. The lower substrate 2 is longer than the upper substrate 3 and extends outwards to form a step. A driving IC 5 and an FPC 6 are bonded to the upper surface of the lower substrate 2 at the step. A copper layer 61 is provided inside the FPC 6. A conductive cloth 7 is provided on the upper surface of the FPC 6. Windows 62 are provided at the protective layer on the upper surface of the FPC 6 at the four vertices of the conductive cloth 7 to expose the copper layer 61. Copper alignment lines 63 are provided at the copper layer 61 on the FPC 6 at the four windows 62. That is, the copper layer 61 and the copper alignment lines 63 are formed simultaneously during exposure production, except that a hollowed-out part is provided around the copper alignment lines 63. The copper alignment lines 63 are made independent, and no circuits can be provided around the copper alignment lines 63, so that the copper alignment lines 63 alone play the role of alignment and avoid short circuits. Since the copper layer 61 on the FPC 6 is made by exposure, the accuracy of the copper alignment lines 63 and the copper PIN feet at the binding positions is high, which is much higher than the accuracy of the white oil screen printing lines. Therefore, it can be used for the position control of the conductive cloth 7. The position of the conductive cloth 7 is calibrated by providing copper alignment lines 63 at the copper layer 61, so as to improve the sticking accuracy of the FPC 6 conductive cloth 7, avoid misjudgment of the position of the conductive cloth 7, avoid problems in the product structure, effectively release static electricity, and further prevent the liquid crystal display screen from being damaged by static electricity and improve the yield of the liquid crystal display screen.
[0036] Further, when the accuracy requirement of the conductive cloth 7 is 0.3 mm, the width of the copper alignment lines 63 is 0.3 mm. The distances between the two sides of the copper alignment lines 63 and the two sides of the windows 62 are both 0.3 mm.
[0037] Further, components 8 are provided on the upper surface of the FPC 6 near the conductive cloth 7, and a reinforcing plate 9 is provided on the lower surface of the FPC 6 at the components 8 to increase the strength of the FPC 6 here.
[0038] Further, the outer edges of the copper alignment lines 63 are flush with the outer edges of the conductive cloth 7, so that when the conductive cloth 7 is stuck with deviation, it can be recognized at a glance.
[0039] Please refer to Figure 6 and Figure 7 As a further optimized solution of Embodiment 1, in this embodiment, the FPC 6 includes a non-bending area 601 and bending areas 602 provided on both sides of the non-bending area 601. The bending areas 602 are provided with PI reinforcements 64 and a plurality of vias 65. These vias 65 are bridges connecting the upper and lower copper layers 61, and their reliability is very important. The vias 65 cannot be under heavy pressure, are afraid of being scratched, and are even more afraid of being damaged by folding. Therefore, in general, vias 65 are not allowed in the bending area 602 because the bending force will directly act on the vias 65, affecting the reliability of the vias 65. The PI reinforcement 64 completely covers the plurality of vias 65. A plurality of vias 65 are provided on the non-bending area 601. The vias 65 are relatively fragile, and stress concentration is likely to occur, leading to fracture at the vias 65. Since the PI reinforcement 64 completely covers the vias 65, the stress is concentrated around the reinforcement plate 9 rather than at the vias 65, preventing the risk of fracture at the vias 65 and avoiding the failure of the FPC 6.
[0040] Furthermore, the plurality of vias 65 are arranged in a line segment shape. Due to the provision of the reinforcement plate 9 that completely covers the vias 65, even if the vias 65 are arranged in a line segment shape, it can be ensured that fractures are not likely to occur at the vias 65, improving the designability of the product and enhancing the competitiveness of the product.
[0041] Furthermore, the PI reinforcement 64 is a PI covering film, which has a lower cost and a simpler assembly process.
[0042] Furthermore, the thickness of the PI covering film is 0.1 mm to ensure that the PI covering film has sufficient strength. The PI covering film is fixed by double-sided adhesive, and the thickness of the double-sided adhesive is 0.025 mm. The distance between the edge of the covering film and the via 65 is greater than 0.5 mm to ensure that the stress concentration area does not affect the via 65, preventing the risk of fracture at the via 65 and avoiding the failure of the FPC 6.
[0043] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. 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.
[0044] Obviously, the embodiments described above are only a part of the embodiments of the present application, rather than all of them. The preferred embodiments of the present application are shown in the 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 disclosed content of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments or equivalently replace some of the technical features. Any equivalent structure directly or indirectly using the content of the specification and drawings of the present application in other related technical fields shall be within the scope of the patent protection of the present application by the same token.
Claims
1. A liquid crystal display screen with improved FPC conductive fabric pasting accuracy, characterized in that: It includes a lower polarizer, a lower substrate, an upper substrate and an upper polarizer stacked in sequence from bottom to top, the lower substrate is longer than the upper substrate and extends outward to form a step, the upper surface of the lower substrate located at the step is bound with a driver IC and an FPC, a copper layer is arranged inside the FPC, a conductive cloth is arranged on the upper surface of the FPC, windows are arranged on the upper surface of the FPC at the four vertices of the conductive cloth, and copper alignment lines are arranged on the copper layer on the FPC located at the four windows.
2. The liquid crystal display screen for improving the pasting accuracy of FPC conductive cloth according to claim 1, characterized in that: The width of the copper alignment line is 0.3 mm.
3. The liquid crystal display screen with improved FPC conductive fabric pasting accuracy according to claim 1, characterized in that: The distance between the two sides of the copper alignment line and the two sides of the window is 0.3 mm.
4. The liquid crystal display screen for improving the pasting accuracy of FPC conductive cloth according to claim 1, characterized in that: Components are arranged on the upper surface of the FPC near the conductive cloth, and a reinforcing plate is arranged on the lower surface of the FPC located at the components.
5. The liquid crystal display screen with improved FPC conductive fabric pasting accuracy according to claim 1, characterized in that: The outer edge of the copper alignment line is flush with the outer edge of the conductive cloth.
6. The liquid crystal display screen with improved FPC conductive fabric pasting accuracy according to claim 1, characterized in that: The FPC includes a non-bending area and bending areas arranged on both sides of the non-bending area. The bending area is provided with PI reinforcement and a plurality of vias, and the PI reinforcement completely covers the plurality of vias.
7. The liquid crystal display screen for improving the pasting accuracy of FPC conductive cloth according to claim 6, characterized in that: A plurality of the via holes are arranged in a line segment shape.
8. The liquid crystal display screen with improved FPC conductive fabric pasting accuracy according to claim 6, characterized in that: The PI reinforcement is a PI covering film.
9. The liquid crystal display screen with improved FPC conductive fabric pasting accuracy according to claim 8, characterized in that: The thickness of the PI covering film is 0.1 mm.
10. The liquid crystal display screen with improved FPC conductive fabric pasting accuracy according to claim 6, characterized in that: The PI reinforcement does not extend beyond the non-bending area.