TFT display module with ACF

Abstract

The embodiment of the utility model belongs to the technical field of TFT (Thin Film Transistor) display modules. The utility model further relates to a TFT display module with the ACF, the TFT display module comprises a TFT display assembly and a main screen FPC bound with the TFT display assembly, a plurality of glass binding PADs are arranged on the TFT display assembly, a plurality of FPC binding PADs are arranged on the main screen FPC, an ACF body is connected between the glass binding PADs and the FPC binding PADs, and the ACF body is connected with the main screen FPC. The two sides of the face, close to the ACF body, of the main screen FPC are each provided with an isolation piece, and the isolation pieces are used for isolating the ACF body. According to the invention, the isolation piece is arranged on the main screen FPC, and the isolation piece can isolate the ACF main body, so that the ACF main body is effectively isolated from the test point of the TFT display assembly, and the problem that the ACF main body overflows and stacks to cause short circuit of the test point and further cause abnormal display is solved.

Description

Technical Field

[0001] This utility model relates to the field of TFT display module technology, and more specifically, to a TFT display module with ACF. Background Technology

[0002] In the display market, TFT display modules are widely used in various consumer products due to their relatively low cost, including but not limited to smart bracelets, smartwatches, smart home products and e-cigarette products. Especially in the field of consumer smartwatches, TFT display modules have almost become standard. However, in the actual application of TFT display module smartwatch projects at our clients, a large number of high current failures have occurred. This has not only affected the performance and stability of the products, but also caused significant economic losses to the company.

[0003] In-depth analysis and research revealed that the root cause of the high-current defect problem lies in the accumulation of ACF (anisotropic conductive film), leading to TFT display module abnormalities. During the bonding process of the TFT display module, ACF plays a crucial role in connecting the glass PAD and the FPC PAD. Conductive particles within the ACF burst under heat and pressure, exposing metal spheres and thus achieving conductivity between the glass PAD and the FPC PAD. However, because the width of the ACF needs to be larger than the FPC PAD to ensure complete overlap and bonding, this results in ACF defects in certain areas (such as near the glass ITO metal fast detection pilot, i.e....). Figure 4 The accumulation of ACF (as indicated by point A) can easily cause short circuits at the test points due to the close structural relationship between the glass ITO metal fast detection probe and the FPC-bonded PAD, leading to display abnormalities. Therefore, we propose an improvement by introducing a TFT display module with ACF. Utility Model Content

[0004] The technical problem to be solved by this utility model embodiment is that the accumulation of ACF can easily cause short circuits at test points, leading to abnormal display.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A TFT display module with an ACF (Active Color Filter) includes: a TFT display component and a main screen FPC (Flexible Printed Circuit) bonded to the TFT display component. The TFT display component has a plurality of glass bonding pads, and the main screen FPC has a plurality of FPC bonding pads. An ACF body is connected between the glass bonding pads and the FPC bonding pads. Isolators are provided on both sides of the main screen FPC near the ACF body, and the isolation components are used to isolate the ACF body.

[0007] As an improvement of this utility model, the isolation component is made by screen printing with white ink.

[0008] As an improvement of this utility model, the separator is a PET separator, and the PET separator is connected to the side of the main screen FPC close to the ACF body.

[0009] As an improvement of this utility model, the length of the FPC-bonded PAD is greater than the length of the glass-bonded PAD, and one end of the FPC-bonded PAD extends from the side of the TFT display component.

[0010] As an improvement of this utility model, the distance between the end of the FPC-bonded PAD extending from the side of the TFT display component and the side of the TFT display component is at least 0.3mm.

[0011] As an improvement of this utility model, the outermost FPC-bonded PAD is a T-shaped PAD, and the distance between the side of the ACF body and the T-shaped PAD is 0.1mm.

[0012] As an improvement of this utility model, an adhesive layer is also provided between the main screen FPC and the TFT display component.

[0013] As an improvement of this utility model, the TFT display component includes a lower glass layer, and the glass-bonded PAD is disposed on the lower glass layer.

[0014] As an improvement of this utility model, the front side of the lower glass is connected to the upper glass, the front side of the upper glass is provided with an upper polarizer, the back side of the lower glass is provided with a lower polarizer, and a driver IC is also provided on the lower glass.

[0015] As an improvement of this utility model, the lower glass is further provided with AG points, and conductive silver paste is connected between the upper polarizer, the upper glass and the AG points.

[0016] Compared with the prior art, the embodiments of this utility model have the following main advantages:

[0017] To address the problem in existing technologies where ACF stacking can easily cause short circuits at test points, leading to display abnormalities, this application proposes setting an isolator on the main screen FPC. This isolator can isolate the ACF body, thereby effectively separating the ACF body from the test points of the TFT display component. This reduces the problem of short circuits at test points caused by ACF overflow and stacking, which in turn leads to display abnormalities. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of a TFT display module with ACF provided in this application;

[0019] Figure 2 A partial structural schematic diagram of a TFT display module with ACF provided in this application;

[0020] Figure 3 A partial exploded view of the TFT display module with ACF provided in this application;

[0021] Figure 4 A schematic diagram of the structure of the isolation component for the TFT display module with ACF provided in this application;

[0022] Figure 5 This is a schematic diagram of the structure of an existing TFT display module when ACF is stacked.

[0023] The image shows:

[0024] 1. TFT display assembly; 101. Lower glass; 102. Glass bonding PAD; 103. Upper glass; 104. Upper polarizer; 105. Conductive silver paste; 106. Driver IC; 2. Main screen FPC; 201. FPC bonding PAD; 3. ACF body; 4. Isolator. Detailed Implementation

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The reference herein to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0026] As described in the background art, since the width of the ACF needs to be greater than that of the FPC PAD to ensure that the two can completely overlap and bond together, this leads to the accumulation of ACF in certain areas. Since the structural relationship between the glass ITO metal fast detection pilot and the FPC bonding PAD is relatively close, the accumulation of ACF can easily cause short circuits at the test points, resulting in abnormal display.

[0027] To solve this technical problem, this utility model provides a TFT display module with ACF.

[0028] For details, please refer to Figures 1-4 The TFT display module with ACF specifically includes:

[0029] The TFT display component 1 and the main screen FPC 2 bonded to the TFT display component 1 are provided. The TFT display component 1 is provided with a number of glass bonding PADs 102, and the main screen FPC 2 is provided with a number of FPC bonding PADs 201. An ACF body 3 is connected between the glass bonding PADs 102 and the FPC bonding PADs 201. Isolators 4 are provided on both sides of the main screen FPC 2 near the ACF body 3. The isolation components 4 are used to isolate the ACF body 3.

[0030] The TFT display module with ACF provided by this utility model has an isolator 4 on the main screen FPC2. The isolator 4 can isolate the ACF body 3, thereby effectively isolating the ACF body 3 from the test points of the TFT display component 1, reducing the problem of short circuits caused by overflow and stacking of the ACF body 3, which could lead to display abnormalities.

[0031] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0032] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] Embodiment 1 of the TFT display module with ACF of this utility model

[0035] Please refer to Figures 1-4This utility model discloses a TFT display module with ACF, comprising: a TFT display component 1 and a main screen FPC 2 bonded to the TFT display component 1. The TFT display component 1 has a plurality of glass bonding pads 102, and the main screen FPC 2 has a plurality of FPC bonding pads 201. An ACF body 3 connects the glass bonding pads 102 and the FPC bonding pads 201. Isolators 4 are provided on both sides of the main screen FPC 2 near the ACF body 3, and the isolators 4 are used to isolate the ACF body 3. This application, by providing isolators 4 on the main screen FPC 2, can isolate the ACF body 3, thereby effectively isolating the ACF body 3 from the test points of the TFT display component 1, reducing the risk of short circuits at the test points caused by overflow and stacking of the ACF body 3. In the production of the TFT display module... During production and use, the characteristics of ACF material determine that it may experience slight flow and deformation during hot pressing or long-term use, which can easily spread to the surrounding area. As a key part of the electrical performance testing of the TFT display component 1, the test point will form a conductive path and cause a short circuit once it comes into contact with the overflowing stacked ACF. The short circuit will not only directly lead to inaccurate test data, making it difficult to pass quality control in the production process, but also cause serious abnormalities such as flickering, horizontal lines, or even black screen in the finished product use stage, which will greatly reduce the reliability of the product and the user experience. The existence of the isolation component 4 is like a barrier, which precisely blocks the possible contact path between the ACF body 3 and the test point, ensuring the independence and stability of the electrical circuit, thereby ensuring the stable operation and reliable performance of the display module.

[0036] Embodiment 2 of the present invention: a TFT display module with ACF

[0037] Furthermore, in this utility model of a TFT display module with ACF, the isolator 4 is screen-printed with white ink. The white ink itself has good insulation properties and extremely high resistivity, which can effectively prevent current conduction, thereby reducing short circuit problems caused by overflow of 3. From the perspective of chemical stability, the white ink can withstand certain temperature changes, humidity effects, and chemical corrosion. In the complex working environment and production process of the TFT display module, it can maintain stable and reliable isolation performance. The white ink screen printing process is one of the more mature and low-cost processes among many electronic manufacturing processes. It does not require complex equipment and high raw material input to form the isolator 4 on the surface of the main screen FPC2. The simplicity of this process makes large-scale production possible, which is conducive to the promotion and application of the product in the market and improves the product's cost performance and market competitiveness.

[0038] Embodiment 3 of the TFT display module with ACF of this utility model

[0039] Furthermore, in this TFT display module with ACF, the insulating component 4 is a PET separator, and the PET separator is connected to the side of the main screen FPC2 closest to the ACF body 3. PET material has high tensile strength and tear resistance. During the assembly, transportation, and long-term use of the module, even if subjected to external pressure, bending, or vibration, the PET separator can maintain its complete structural shape, stably isolate the ACF body 3, reduce short-circuit faults caused by overflow and accumulation of the ACF body 3, and effectively protect test points. Secondly, PET has good chemical resistance and can resist the corrosion of common chemical reagents such as solvents and cleaning agents in the electronic manufacturing process. This stability can ensure that it can continue to play an insulating role under long-term use and different environmental conditions, improve the durability and reliability of the TFT display module, and extend the service life of the product.

[0040] Embodiment 4 of the present invention: a TFT display module with ACF.

[0041] The TFT display module with ACF of this utility model further includes, for example... Figures 1-3 As shown, the length of FPC-bonded PAD 201 is greater than the length of glass-bonded PAD 102, and one end of FPC-bonded PAD 201 extends from the side of TFT display component 1.

[0042] Furthermore, the distance between the end of the FPC bonding PAD 201 extending from the side of the TFT display component 1 and the side of the TFT display component 1 is at least 0.3mm. Due to the structure, the test point of the TFT display component 1 is relatively close to the FPC bonding PAD 201, which causes the ACF body 3 to easily overflow and accumulate at the FPC bonding PAD 201. By increasing the length of the FPC bonding PAD 201 and maintaining a certain distance from the side of the TFT display component 1, the accumulation of the ACF body 3 can be effectively reduced. During the pressure connection process of the ACF body 3, it has a certain fluidity. When the distance between the FPC-bonded PAD201 and the glass edge is relatively short, the ACF body 3 tends to accumulate in a limited space and spread towards the test point. However, by increasing the length of the FPC-bonded PAD201 and widening the spacing, the ACF body 3 has a wider dispersion space when flowing, and its accumulation thickness and range can be effectively controlled. This reduces short circuit display abnormalities at test points caused by the accumulation of ACF body 3, thereby improving the stability and reliability of the TFT display module. Because the accumulation of ACF body 3 in critical parts is reduced, short circuits caused by the accumulation of ACF body 3 are reduced, ensuring the stable electrical performance of the display module.

[0043] Embodiment 5 of the present invention: a TFT display module with ACF.

[0044] The TFT display module with ACF of this utility model further includes, for example... Figure 2 As shown, the outermost FPC-bonded PAD201 is a T-shaped PAD, and the distance between the side of the ACF body 3 and the T-shaped PAD is 0.1mm. This setting reduces the length of the ACF body 3 compared to the prior art, and keeps the edge of the ACF body 3 at a certain distance from the nearest T-shaped PAD. This also helps to reduce the stacking of the ACF body 3 and the risk of short circuit.

[0045] An adhesive layer is also provided between the main screen FPC2 and the TFT display component 1. The adhesive layer is UV glue or blue glue. The adhesive layer is used to bond and fix the part between the main screen FPC2 and the TFT display component 1 where the ACF body 3 is not provided, further reducing the length of the ACF body 3 and ensuring the firmness of the connection between the main screen FPC2 and the TFT display component 1.

[0046] Embodiment Six of the present invention: a TFT display module with ACF

[0047] The TFT display module with ACF of this utility model further includes a lower glass 101, and a glass bonding PAD 102 is disposed on the lower glass 101.

[0048] Furthermore, such as Figure 1 As shown, the upper glass 103 is connected to the front of the lower glass 101. An upper polarizer 104 is disposed on the front of the upper glass 103, and a lower polarizer is disposed on the back of the lower glass 101. A driver IC 106 is also disposed on the lower glass 101. A glass bonding PAD 102 is disposed on the lower glass 101 to facilitate connection with the main screen FPC2 for signal transmission and other functions. Its precise layout and good electrical contact performance ensure efficient and stable data transmission between the TFT display component 1 and the main screen FPC2, providing a foundation for accurate presentation of the displayed content. To ensure accuracy, the upper glass 103 and lower glass 101 work together, along with the polarizer, to effectively control the transmission and polarization of light. The upper polarizer 104 and lower polarizer can filter out unwanted light polarization directions, reduce light reflection and scattering, improve the contrast and clarity of the displayed image, making the image more vivid and realistic, and also improve the viewing angle. The driver IC 106 provides the necessary drive signal control for the entire display module. It can precisely adjust the voltage and current of each pixel according to the input image data, thereby ensuring the accurate presentation of the displayed content.

[0049] Furthermore, such as Figure 1As shown, AG points are also provided on the lower glass 101, and conductive silver paste 105 connects the upper polarizer 104, the upper glass 103, and the AG points. The connection between the AG points and the conductive silver paste 105 is mainly used to reduce static electricity. In the operating environment of TFT display modules, static electricity is ubiquitous and can easily damage the electronic components inside the module. The AG points can conduct static electricity away in time through the conductive silver paste 105, reducing the accumulation of static electricity in the module, thereby protecting sensitive electronic components such as the driver IC 106 from electrostatic breakdown or interference. This effectively improves the stability and reliability of the display module, reduces the probability of display abnormalities, component damage, and other failures caused by static electricity, extends the service life of the product, and ensures its normal operation in various static environments.

[0050] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model 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 make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A TFT display module with ACF, characterized in that, include: A TFT display component (1) and a main screen FPC (2) bonded to the TFT display component (1). The TFT display component (1) is provided with a plurality of glass bonding PADs (102), and the main screen FPC (2) is provided with a plurality of FPC bonding PADs (201). An ACF body (3) is connected between the glass bonding PADs (102) and the FPC bonding PADs (201). Isolators (4) are provided on both sides of the main screen FPC (2) near the ACF body (3). The isolation devices (4) are used for isolation of the ACF body (3).

2. The TFT display module with ACF according to claim 1, characterized in that, The isolation element (4) is screen-printed with white ink.

3. The TFT display module with ACF according to claim 1, characterized in that, The separator (4) is a PET separator, and the main screen FPC (2) connected to the PET separator is on the side of the ACF body (3) close to it.

4. The TFT display module with ACF according to claim 1, characterized in that, The length of the FPC-bonded PAD (201) is greater than the length of the glass-bonded PAD (102), and one end of the FPC-bonded PAD (201) extends from the side of the TFT display component (1).

5. The TFT display module with ACF according to claim 1, characterized in that, The distance between the end of the FPC-bonded PAD (201) extending from the side of the TFT display component (1) and the side of the TFT display component (1) is at least 0.3 mm.

6. The TFT display module with ACF according to claim 1, characterized in that, The outermost FPC-bonded PAD (201) is a T-shaped PAD, and the distance between the side of the ACF body (3) and the T-shaped PAD is 0.1mm.

7. The TFT display module with ACF according to claim 1, characterized in that, An adhesive layer is also provided between the main screen FPC (2) and the TFT display component (1).

8. The TFT display module with ACF according to claim 1, characterized in that, The TFT display assembly (1) includes a lower glass (101) and a glass-bonded pad (102) is disposed on the lower glass (101).

9. The TFT display module with ACF according to claim 8, characterized in that, The front side of the lower glass (101) is connected to the upper glass (103), the front side of the upper glass (103) is provided with an upper polarizer (104), the back side of the lower glass (101) is provided with a lower polarizer, and a driver IC (106) is also provided on the lower glass (101).

10. The TFT display module with ACF according to claim 9, characterized in that, The lower glass (101) is also provided with AG points, and conductive silver paste (105) is connected between the upper polarizer (104), the upper glass (103) and the AG points.

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