Low-cost TFT display module
By using conductive carbon paste instead of silver paste in IPS TFT display modules and combining it with a limiting groove design, the problem of high silver paste cost was solved, achieving cost reduction and performance improvement.
Patent Information
- Application Number
- CN202520005623.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-01-02
AI Technical Summary
In existing IPS TFT display modules, the cost of using silver paste for conductive electrostatic treatment is relatively high, which becomes an obstacle to reducing production costs.
Conductive carbon paste is used instead of conductive silver paste. The conductive carbon paste is connected to the AG point, and the limiting groove design is combined to ensure stability and conductivity.
It effectively reduces production costs, improves conductivity and chemical stability, ensures the stability and reliability of the module, reduces power loss and failure rate, and enhances product competitiveness and service life.
Smart Images
Figure CN223844291U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of TFT display module technology, and more specifically, to a low-cost TFT display module. Background Technology
[0002] In the display market, TFT (Thin Film Transistor) display modules occupy an important position in various consumer electronics products due to their lower cost advantage. These products include, but are not limited to, smart bracelets, smartwatches, smart home devices, and e-cigarette products. Especially in the consumer smartwatch market, IPS (In-Plane Switching) TFT display modules are widely used because they combine price advantages with good display effects. The reason why IPS TFT display modules are favored by the market is mainly because they can provide excellent color performance and wide viewing angles. However, with increasingly fierce market competition, consumers have higher and higher requirements for product cost. In order to meet market demands, manufacturers are constantly seeking solutions to optimize the structure of TFT display modules to reduce production costs.
[0003] A key issue in the production of IPS TFTs is static electricity management. Since IPS TFT glass easily accumulates static electricity during production, this can negatively impact display performance if left untreated. Traditionally, silver paste is applied to the IPS TFT glass to conduct static electricity away from the upper and lower glass surfaces. The silver paste, primarily composed of silver particles, has excellent conductivity, effectively releasing static electricity from the upper glass layer to the lower glass layer. The static electricity then travels through the internal coating lines of the lower wafer to the GND (Ground) layer of the FPC (Flexible Printed Circuit) bonded to the single-layer glass area, ultimately dissipating the static electricity. However, despite its excellent conductivity, the high cost of silver paste is a major obstacle to reducing the cost of IPS TFT display modules, especially with the large shipment volume of IPS TFTs, where the cost of silver paste will further increase. Therefore, we propose an improvement, creating a low-cost TFT display module. Utility Model Content
[0004] The technical problem to be solved by this utility model embodiment is to conduct away static electricity on the upper and lower glass surfaces using silver paste, but the cost of using silver paste is relatively high.
[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0006] A low-cost TFT display module includes: a TFT display component, the TFT display component including a lower glass and an upper glass disposed on the lower glass, the lower glass having AG points disposed thereon, and the AG points being connected to the upper glass by conductive carbon paste.
[0007] As an improvement of this utility model, the contact resistance between the conductive carbon paste and the AG point is less than 10 ohms to ensure good electrical connection performance.
[0008] As an improvement of this utility model, the conductive carbon paste has a length of 1.522 mm and a width of 0.876 mm at the upper end.
[0009] As an improvement of this utility model, a limiting groove is formed on the upper glass, and a portion of the conductive carbon paste is disposed in the limiting groove.
[0010] As an improvement of this utility model, the length of the limiting groove is 0.611 mm, and the width of the middle part of the limiting groove is 1.117 mm.
[0011] As an improvement of this utility model, the inner wall of the limiting groove is roughened, and the roughness value of the inner wall of the limiting groove is between Ra0.5 and Ra1.5, which enhances the adhesion of the conductive carbon paste in the limiting groove.
[0012] As an improvement of this utility model, an upper polarizer is connected to the side of the upper glass that is away from the lower glass, and a lower polarizer is connected to the side of the lower glass that is away from the upper glass.
[0013] As an improvement of this utility model, a driver IC is bonded to the lower glass.
[0014] As an improvement of this utility model, a main screen FPC is bound to the lower glass.
[0015] As an improvement of this utility model, the AG point is set at the corner of the bottom of the lower glass.
[0016] Compared with the prior art, the embodiments of this utility model have the following main advantages:
[0017] To address the issue of high costs associated with using silver paste to conduct static electricity away from the upper and lower glass surfaces in existing technologies, this application introduces conductive carbon paste to replace conductive silver paste, effectively reducing the production cost of IPS TFT display modules. The main component of conductive carbon paste 2 is carbon powder, which is a common and low-cost material. Furthermore, conductive carbon powder has excellent conductivity and chemical stability, maintaining good conductivity even at high temperatures, thus ensuring the stability and reliability of IPS TFT display modules. Attached Figure Description
[0018] Figure 1 A schematic diagram of the structure of the low-cost TFT display module provided in this application;
[0019] Figure 2 A schematic diagram of the conductive carbon paste for the low-cost TFT display module provided in this application;
[0020] Figure 3 A schematic diagram of the limiting groove and AG point of the low-cost TFT display module provided in this application;
[0021] Figure 4 A schematic diagram of the limiting groove of the low-cost TFT display module provided in this application.
[0022] The image shows:
[0023] 1. TFT display assembly; 101. Lower glass; 102. Upper glass; 103. AG dot; 104. Upper polarizer; 2. Conductive carbon paste; 3. Main screen FPC; 4. Limiting groove; 5. Driver IC. Detailed Implementation
[0024] 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.
[0025] As described in the background section, IPS TFT glass is prone to static electricity accumulation during production, which can negatively impact display performance if left untreated. Therefore, the traditional approach is to apply silver paste to the IPS TFT glass to conduct static electricity away from the upper and lower glass surfaces. The main component of silver paste is silver particles, which have excellent conductivity, effectively releasing static electricity from the upper glass to the lower glass. This static electricity then travels through the internal coating lines of the lower wafer to the FPC (Flexible Printed Circuit), the grounding layer of the flexible printed circuit board, ultimately dissipating the static electricity. However, despite the excellent conductivity of silver paste, its high cost has become a major obstacle to reducing the cost of IPS TFT display modules, especially given the large shipment volume of IPS TFTs, where the cost of using silver paste will further increase.
[0026] To solve this technical problem, this utility model provides a low-cost TFT display module.
[0027] For details, please refer to Figures 1-4 Low-cost TFT display modules specifically include:
[0028] The TFT display assembly 1 includes a lower glass 101 and an upper glass 102 disposed on the lower glass 101. AG points 103 are disposed on the lower glass 101, and conductive carbon paste 2 is connected between the AG points 103 and the upper glass 102.
[0029] The present invention provides a low-cost TFT display module. This application introduces conductive carbon paste 2 to replace conductive silver paste, which effectively reduces the production cost of IPS TFT display modules. The main component of conductive carbon paste 2 is carbon powder. Carbon powder is a common and low-cost material. At the same time, conductive carbon powder has good conductivity and chemical stability and can maintain good conductivity in high-temperature environments, thereby ensuring the stability and reliability of IPS TFT display modules.
[0030] 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.
[0031] 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.
[0032] 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.
[0033] Embodiment 1 of the low-cost TFT display module of this utility model
[0034] Please refer to Figures 1-4 This utility model discloses a low-cost TFT display module comprising: a TFT display component 1, which includes a lower glass 101 and an upper glass 102 disposed on the lower glass 101. AG points 103 are disposed on the lower glass 101, and conductive carbon paste 2 connects the AG points 103 and the upper glass 102. This application uses conductive carbon paste 2 instead of conductive silver paste, bringing several significant benefits. From a cost perspective, carbon powder is abundant and readily available in nature, and its mining and processing costs are significantly lower than those of precious metals such as silver. This is directly reflected in the raw material procurement stage, significantly reducing production costs. This makes the product more price-competitive in the market. In terms of performance, the excellent conductivity of conductive carbon paste 2 ensures that the current can be smoothly transmitted inside the module, effectively reducing power loss and heat generation caused by excessive resistance. This not only helps to improve the energy efficiency ratio of the module, but also reduces component aging or damage caused by overheating, thereby extending the product's service life. Its chemical stability is also a major advantage. Even in high-temperature environments, such as long-term use or special working conditions, it can still maintain stable conductivity characteristics, unlike some conductive materials that experience a decline in conductivity due to changes in chemical structure. This greatly ensures the stability and reliability of the IPS TFT display module in various complex environments, reduces the failure rate caused by environmental factors, reduces after-sales maintenance costs and product recall risks, and lays a solid foundation for the large-scale application and long-term stable operation of the product.
[0035] Furthermore, the contact resistance between the conductive carbon paste 2 and the AG point 103 is less than 10 ohms to ensure good electrical connection performance.
[0036] Furthermore, the conductive carbon paste 2 has a length of 1.522 mm and a width of 0.876 mm at the top. The specific dimensions of the conductive carbon paste 2 are carefully designed. In the manufacturing process, precise dimensions help improve the accuracy and efficiency of assembly and reduce the scrap rate caused by deviations in the dimensions of the conductive carbon paste 2.
[0037] Embodiment 2 of the low-cost TFT display module of this utility model
[0038] This utility model provides a low-cost TFT display module, further as follows: Figure 3 and Figure 4As shown, a limiting groove 4 is formed on the upper glass 102, and a portion of the conductive carbon paste 2 is disposed within the limiting groove 4. The placement of the limiting groove 4 on the upper glass 102 and the placement of a portion of the conductive carbon paste 2 within it has multiple positive effects on the module's performance and production process. In terms of stability, the limiting groove 4 provides reliable physical constraints for the conductive carbon paste 2, effectively reducing displacement or deformation caused by vibration, impact, or other external forces during the module's production, transportation, assembly, and daily use. This improved stability is crucial for ensuring a consistently good electrical connection between the conductive carbon paste 2, the AG point 103, and the upper glass 102, greatly enhancing product reliability and stability, and reducing downtime and maintenance costs due to malfunctions. From a manufacturing perspective, the presence of the limiting groove 4 provides a clear positioning reference for the conductive carbon paste 2, helping to improve assembly accuracy and consistency during production. Furthermore, the limiting groove 4 reduces the impact of the conductive carbon paste 2 flowing towards the driver IC 5.
[0039] Furthermore, the length of the limiting groove 4 is 0.611 mm, and the width of the middle part of the limiting groove 4 is 1.117 mm.
[0040] Furthermore, the inner wall of the limiting groove 4 is roughened, with a roughness value between Ra0.5 and Ra1.5. This roughened inner wall provides an ideal adhesion surface for the conductive carbon paste 2, offering several significant advantages. First, the rough surface significantly increases the contact area between the inner wall of the limiting groove 4 and the conductive carbon paste 2. According to the principle of friction in physics, an increased contact area means increased friction, allowing the conductive carbon paste 2 to adhere more firmly to the limiting groove 4. This effectively resists interference from various external forces, such as vibrations during transportation and thermal expansion and contraction stress caused by temperature changes in the usage environment. This greatly reduces the possibility of the conductive carbon paste 2 detaching or loosening from the limiting groove 4. In terms of long-term stability, good adhesion ensures that the electrical connection between conductive carbon 2 and AG point 103 and upper glass 102 remains stable and reliable, reducing intermittent display failures caused by loose connections, ensuring the display module can work continuously and stably, reducing the impact of fault repair on normal user use, and improving the product's ease of use and reliability. From the perspective of product lifespan, stable adhesion reduces damage to the overall structure of the module caused by repeated repairs or replacements of connection parts, extending the overall service life of the product, reducing the total cost of use throughout the product's life cycle, and also enhancing the product's competitiveness and brand image in the market, strengthening users' confidence in the product's quality and durability.
[0041] Embodiment 3 of the low-cost TFT display module of this utility model
[0042] This utility model provides a low-cost TFT display module, further as follows: Figure 1 As shown, the side of the upper glass 102 away from the lower glass 101 is connected to an upper polarizer 104, and the side of the lower glass 101 away from the upper glass 102 is connected to a lower polarizer. The arrangement of the upper and lower polarizers has a fundamental effect on improving the display effect of the TFT display module. From an optical principle perspective, polarizers can selectively filter the polarization direction of light, allowing only light with a specific polarization direction to pass through. The upper polarizer 104 and the lower polarizer work together to effectively block most of the stray light from entering the external environment, reducing the interference and scattering of these stray lights on the display screen. In terms of contrast, this effective suppression of stray light makes the bright parts of the display screen brighter and the dark parts darker, significantly improving the contrast of the image, making the image more layered and the details clearer.
[0043] Furthermore, such as Figure 1 As shown, a driver IC5 is bonded to the lower glass 101. The driver IC5 plays a key role in the core control and signal processing of the TFT display module and has many important aspects. In terms of display signal processing, the driver IC5 has the ability to calculate and convert signals. It can accurately analyze, process and optimize the input display signals of various formats and frequencies, and convert them into electrical signal formats suitable for driving the pixels of the TFT display panel.
[0044] Furthermore, such as Figure 1 As shown, the main screen FPC3 is bonded to the lower glass 101. The bonding of the main screen FPC3 forms an efficient and stable signal transmission bridge for the TFT display module, playing multiple key roles. In terms of signal transmission, the FPC adopts a special flexible circuit design, which has excellent conductivity and signal transmission stability. It can accurately transmit various control signals, data signals, and power signals input from external devices to the corresponding components inside the display module, ensuring that the display module can receive and execute various display commands in a timely and accurate manner, and achieve precise image display. Its good flexibility allows it to bend and fold freely in a narrow space, perfectly adapting to the design trend of modern electronic products becoming increasingly thinner and smaller.
[0045] Furthermore, such as Figure 1As shown, the AG point 103 is located at the bottom corner of the lower glass 101. From the perspective of circuit layout optimization, this corner position cleverly utilizes the relatively empty space resources at the bottom of the lower glass 101, reducing the mutual interference between the AG point 103 and the display area. It also reduces the encroachment on the layout space of other important electronic components, allowing the internal circuit wiring of the module to be planned and arranged more simply and smoothly. Simpler circuit wiring means lower line resistance and inductance, which can effectively reduce the loss and interference in the signal transmission process, improve the stability and reliability of electrical connections, and ensure that the display signal can be transmitted to each pixel with higher quality, thereby improving the quality and stability of the display screen.
[0046] 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 low-cost TFT display module, characterized in that, include: The TFT display assembly (1) includes a lower glass (101) and an upper glass (102) disposed on the lower glass (101). An AG point (103) is disposed on the lower glass (101), and a conductive carbon paste (2) is connected between the AG point (103) and the upper glass (102).
2. The low-cost TFT display module according to claim 1, characterized in that, The contact resistance between the conductive carbon paste (2) and the AG point (103) is less than 10 ohms to ensure good electrical connection performance.
3. The low-cost TFT display module according to claim 1, characterized in that, The conductive carbon paste (2) has a length of 1.522 mm and a width of 0.876 mm at the top.
4. The low-cost TFT display module according to claim 1, characterized in that, A limiting groove (4) is formed on the upper glass (102), and a portion of the conductive carbon paste (2) is disposed in the limiting groove (4).
5. The low-cost TFT display module according to claim 4, characterized in that, The length of the limiting groove (4) is 0.611 mm, and the width of the middle part of the limiting groove (4) is 1.117 mm.
6. The low-cost TFT display module according to claim 4, characterized in that, The inner wall of the limiting groove (4) is roughened, and the roughness value of the inner wall of the limiting groove (4) is between Ra0.5 and Ra1.5, which enhances the adhesion of the conductive carbon paste (2) in the limiting groove (4).
7. The low-cost TFT display module according to claim 1, characterized in that, The upper glass (102) is connected to an upper polarizer (104) on the side away from the lower glass (101), and the lower glass (101) is connected to a lower polarizer on the side away from the upper glass (102).
8. The low-cost TFT display module according to claim 1, characterized in that, A driver IC (5) is attached to the lower glass (101).
9. The low-cost TFT display module according to claim 1, characterized in that, The main screen FPC (3) is attached to the lower glass (101).
10. The low-cost TFT display module according to claim 1, characterized in that, The AG point (103) is located at the corner of the bottom of the lower glass (101).