Liquid crystal display module

Abstract

The embodiment of the utility model belongs to the technical field of liquid crystal display. The utility model further relates to a liquid crystal display module which comprises an LCD display module and a main screen FPC bound with the LCD display module, the LCD display module comprises a CF glass substrate and a TFT glass substrate, an ITO coating film is arranged on the CF glass substrate, two AG point bodies are arranged on the TFT glass substrate, first connecting pieces are arranged between the two AG point bodies and the ITO coating film, and second connecting pieces are arranged between the two AG point bodies and the first connecting pieces. The main screen FPC is provided with a first test point and a second test point, and the first test point and the second test point are respectively connected with the two AG point bodies. The first test point and the second test point which are connected with the two AG point main bodies are arranged on the main screen FPC to serve as detection points, whether the conductive silver paste main body conducts the ITO coating film and the AG point main bodies or not can be judged by detecting the conduction resistance between the first test point and the second test point, and rapid and accurate measurement can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal display, and more specifically, to a liquid crystal display module. Background Art

[0002] During the liquid crystal display (LCD) manufacturing process, in order to improve the electromagnetic compatibility (EMC) performance of the LCD and effectively shield static electricity, the outermost surface of the CF glass is usually covered with a layer of indium tin oxide (ITO) coating. This ITO coating needs to be connected to the ground (GND) through silver paste to ensure that static electricity can be discharged in time to prevent interference with display performance.

[0003] The traditional connection method involves applying silver paste at specific locations using a machine to connect the ITO coating to the AG points (ground connection points) on the TFT glass. These AG points are ultimately connected to the system's GND network via a flexible printed circuit (FPC). However, existing production lines lack effective testing methods to verify the connection quality of the silver paste after application. If the silver paste points are not fully connected or the connection is poor, a short circuit or excessive resistance can occur between the ITO coating and GND, affecting the LCD's EMC performance and even causing product failure. Therefore, we have improved this problem and proposed a liquid crystal display module. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the present invention is the lack of effective detection means to verify the connection quality of the silver paste after applying the silver paste.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A liquid crystal display module includes: an LCD display module and a main screen FPC bound to the LCD display module, the LCD display module including a CF glass substrate and a TFT glass substrate, the CF glass substrate being provided with an ITO coating, the TFT glass substrate being provided with two AG dot bodies, a first connector being provided between each of the two AG dot bodies and the ITO coating, and the main screen FPC being provided with a first test point and a second test point, the first test point and the second test point being connected to the two AG dot bodies, respectively.

[0007] As an improvement of the present invention, the second test point is connected to the grounding network of the main screen FPC.

[0008] As an improved approach of the present invention, the first connecting member is a conductive silver paste body, and the conductive silver paste body is connected between the AG dot body and the ITO coating.

[0009] As an improvement of the present invention, a second connecting piece is connected between the first test point and the second test point and the two AG point bodies, and the first test point and the second test point are connected to the two AG point bodies through the second connecting piece.

[0010] As an improved manner of the present invention, the second connecting member includes two connecting lines, and the two connecting lines are respectively connected between the two AG point bodies and the first test point and the second test point.

[0011] As an improved approach of the present invention, the main screen FPC is bound to the TFT glass substrate.

[0012] As an improvement of the present invention, a driver IC is further bound to the TFT glass substrate.

[0013] As an improvement of the present invention, the side of the CF glass substrate away from the TFT glass substrate is connected to an upper polarizer, and the side of the TFT glass substrate away from the CF glass substrate is connected to a lower polarizer.

[0014] As an improvement of the present invention, the surfaces of the first test point and the second test point have a gold-plated layer.

[0015] As an improvement of the present invention, the surface of the AG point body is provided with an anti-oxidation coating, and the material of the anti-oxidation coating is titanium nitride.

[0016] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0017] In order to solve the problem in the existing technology of lack of effective detection means to verify the connection quality of silver paste after silver paste is applied, the present application sets a first test point and a second test point connected to the two AG point bodies on the main screen FPC as detection points. By detecting the conduction resistance between the first test point and the second test point, it can be determined whether the conductive silver paste body has connected the ITO coating and the AG point body. The measurement can be done quickly and accurately, and the connection status of the conductive silver paste body can be determined without disassembling the product, reducing rework and scrap caused by poor connection, and improving the overall efficiency and economic benefits of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of the liquid crystal display module provided in this application;

[0019] Figure 2 A schematic diagram of the partial structure of the liquid crystal display module provided in this application;

[0020] Figure 3 A schematic side view of the structure of the liquid crystal display module provided in this application;

[0021] Figure 4 This is a schematic diagram of the structure of the main screen FPC of the liquid crystal display module provided in this application.

[0022] Indicated in the figure:

[0023] 1. LCD display module; 101. CF glass substrate; 102. TFT glass substrate; 103. Upper polarizer; 104. Lower polarizer; 105. Driver IC;

[0024] 2. Main screen FPC;

[0025] 3. First test point;

[0026] 4. Second test point;

[0027] 5. AG point body;

[0028] 6. Conductive silver paste body;

[0029] 7. Connecting wire. DETAILED DESCRIPTION

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this utility model belongs; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model. Reference to "embodiments" herein means that the specific features, structures or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the utility model. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0031] As described in the background, the outermost surface of CF glass is typically covered with a layer of indium tin oxide (ITO) coating. This ITO coating needs to be connected to ground (GND) via silver paste to ensure that static electricity is released in a timely manner and prevent interference with display performance. The traditional connection method involves applying silver paste at specific locations using a machine to connect the ITO coating to the AG points (ground connection points) on the TFT glass. These AG points are ultimately connected to the system's GND network via a flexible printed circuit board (FPC). However, existing production lines lack effective testing methods to verify the connection quality of the silver paste after application. If the silver paste points are not fully connected or the connection is poor, a short circuit or excessive resistance will occur between the ITO coating and GND, which will affect the LCD's EMC performance and may even cause product failure.

[0032] In order to solve this technical problem, the utility model provides a liquid crystal display module.

[0033] Specifically, please refer to Figures 1-4 , the LCD module specifically includes:

[0034] An LCD display module 1 and a main screen FPC2 bound to the LCD display module 1, the LCD display module 1 includes a CF glass substrate 101 and a TFT glass substrate 102, an ITO coating is provided on the CF glass substrate 101, two AG point bodies 5 are provided on the TFT glass substrate 102, a first connecting member is provided between the two AG point bodies 5 and the ITO coating, a first test point 3 and a second test point 4 are provided on the main screen FPC2, the first test point 3 and the second test point 4 are respectively connected to the two AG point bodies 5.

[0035] The liquid crystal display module provided by the utility model sets a first test point 3 and a second test point 4 connected to two AG point bodies 5 as detection points on the main screen FPC2. By detecting the conduction resistance between the first test point 3 and the second test point 4, it can be determined whether the conductive silver paste body 6 has conducted electricity between the ITO coating and the AG point body 5. The measurement can be done quickly and accurately, and the connection status of the conductive silver paste body 6 can be determined without disassembling the product, thereby reducing rework and scrap caused by poor connection and improving the overall efficiency and economic benefits of the production line.

[0036] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein can be combined with each other.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0039] Embodiment 1 of the liquid crystal display module of the present invention

[0040] Please refer to Figures 1-4The liquid crystal display module of the present invention includes: an LCD display module 1 and a main screen FPC2 bound to the LCD display module 1, the LCD display module 1 includes a CF glass substrate 101 and a TFT glass substrate 102, an ITO coating is provided on the CF glass substrate 101, and two AG point bodies 5 are provided on the TFT glass substrate 102, a first connecting member is provided between the two AG point bodies 5 and the ITO coating, a first test point 3 and a second test point 4 are provided on the main screen FPC2, and the first test point 3 and the second test point 4 are respectively connected to the two AG point bodies 5; the present application sets the first test point 3 and the second test point 4 connected to the two AG point bodies 5 on the main screen FPC2 as detection points, and by detecting the conduction resistance between the first test point 3 and the second test point 4, it can be determined whether the conductive silver paste body 6 is conducting the ITO coating and the AG point body 5, and can be measured quickly and accurately, and the connection status of the conductive silver paste body 6 can be determined without disassembling the product, thereby reducing rework and scrap caused by poor connection and improving the overall efficiency and economic benefits of the production line.

[0041] Use a test device, such as a multimeter, to test the on-resistance between the first test point 3 and the second test point 4. If the on-resistance is small (e.g., less than 10 ohms), it indicates that the conductive silver paste body 6 has achieved continuity between the AG dot body 5 and the ITO coating film. If the detection between the first test point 3 and the second test point 4 shows an open circuit or the resistance is too large, it indicates that the connection of the conductive silver paste body 6 is unqualified.

[0042] This detection method brings significant advantages to the production process. In the environment of large-scale production of liquid crystal display modules, traditional detection methods often require disassembly of the product to determine the connection status of the conductive silver paste body 6. This process not only consumes a lot of time, but also easily causes irreparable damage to the delicate structure of the product during the disassembly process. For example, it may cause the glass substrate to break, the FPC circuit to be damaged, or the displacement of other components. These problems will directly increase the workload of product rework and may even cause the product to be completely scrapped. The utility model cleverly sets the first test point 3 and the second test point 4 on the main screen FPC2 as detection points. The operator only needs to use simple testing equipment, such as a multimeter, to detect the conduction resistance between the two test points to quickly and accurately determine whether the conductive silver paste body 6 is well connected to the ITO coating and the AG point body 5. This detection method that does not require disassembly of the product greatly shortens the detection time and reduces the risk of product damage caused by disassembly, thereby effectively reducing the rework rate and scrap rate. From the overall perspective of the production line, this significantly improves production efficiency, reduces production costs, and brings higher economic benefits to the enterprise.

[0043] Furthermore, the second test point 4 is connected to the ground network of the main screen FPC2. The ground network connection between the second test point 4 and the main screen FPC2 has many positive significances in the entire detection and product operation process. In the detection link, the ground network connection can provide a stable reference potential for the detection circuit, effectively avoiding interference from external factors such as static electricity on the detection signal. Static electricity is a common problem in the electronic equipment production environment. It may introduce additional current or voltage during the detection process, thereby causing deviations in the detection results. Through grounding, these static electricity can be safely released to ensure that the detected on-resistance value is true and reliable. When the product is operating normally, the ground network connection also provides safety protection for the entire circuit system. It can prevent abnormal voltage increases due to circuit failures and other reasons, avoid damage to other electronic components, and ensure the electrical safety of the entire LCD display module. This stable grounding design makes the detection data more reliable, reduces misjudgments caused by external interference factors, and improves product quality and detection accuracy in the production process.

[0044] Further, such as Figure 1 and Figure 2 As shown, the first connecting member is a conductive silver paste body 6, which is connected between the AG dot body 5 and the ITO coating. Selecting the conductive silver paste body 6 as the first connecting member is a carefully considered design, which has an important impact on the performance of the liquid crystal display module. The silver paste itself has excellent conductive properties, and its metallic silver component has high conductivity and low resistance characteristics. Using the conductive silver paste body 6 to connect between the AG dot body 5 and the ITO coating can ensure that a stable, low-resistance conductive path is formed between these two key components. This good conductivity is crucial to the normal operation of the liquid crystal display module because it can ensure the efficient transmission of electrical signals between the two components; for example, in the process of displaying images, signals need to be accurately and quickly transmitted between the ITO coating and the AG dot body 5. The use of the conductive silver paste body 6 can effectively avoid signal attenuation or distortion problems caused by excessive connection resistance.

[0045] Further, such as Figure 1 As shown, a second connector is connected between the first test point 3 and the second test point 4 and the two AG point bodies 5, and the first test point 3 and the second test point 4 are connected to the two AG point bodies 5 through the second connector; the second connector plays a key role in the entire detection circuit, establishing a reliable connection channel between the first test point 3 and the second test point 4 and the two AG point bodies 5. In a device such as a liquid crystal display module that has extremely high requirements for electrical connection, a stable connection is the basis for ensuring detection accuracy.

[0046] Further, such as Figure 1As shown, the second connecting member includes two connecting wires 7, which are respectively connected between the two AG point bodies 5 and the first test point 3 and the second test point 4, so that a stable electrical connection is formed between the first test point 3 and the second test point 4 and the corresponding AG point bodies 5, ensuring the stability and reliability of the entire liquid crystal display module detection circuit.

[0047] Embodiment 2 of the liquid crystal display module of the present invention

[0048] The liquid crystal display module of the present invention is further characterized as follows: Figure 1 and Figure 3 As shown, the main screen FPC2 is bonded to the TFT glass substrate 102 .

[0049] Further, such as Figure 1 and Figure 3 As shown, a driver IC 105 is also bound to the TFT glass substrate 102. The binding method establishes a stable and reliable electrical connection between the driver IC 105 and the TFT glass substrate 102. This stable electrical connection ensures precise control of the driver IC 105, thereby ensuring that the liquid crystal display module can accurately display images.

[0050] Further, such as Figure 3 As shown, the side of the CF glass substrate 101 away from the TFT glass substrate 102 is connected to the upper polarizer 103, and the side of the TFT glass substrate 102 away from the CF glass substrate 101 is connected to the lower polarizer 104. The upper polarizer 103 and the lower polarizer 104 play an indispensable role in the optical structure of the liquid crystal display module. Their cooperation with the CF glass substrate 101 and the TFT glass substrate 102 significantly improves the display effect. The main function of the polarizer is to polarize light. By selectively allowing light in a specific direction to pass through, the upper polarizer 103 and the lower polarizer 104 work together to effectively control the propagation path and polarization direction of light in the liquid crystal display module; when displaying the color part, it can restore the color more accurately, making the image more vivid and lively.

[0051] Embodiment 3 of the liquid crystal display module of the present utility model

[0052] Furthermore, the surfaces of the first test point 3 and the second test point 4 of the liquid crystal display module of the present invention are provided with a gold-plated layer. The setting of the gold-plated layer improves the conductivity and corrosion resistance of the test point, and ensures the accuracy of the test. When the test equipment is used for detection, the low contact resistance can ensure that the detected signal is more accurate and reduce the measurement error caused by the resistance of the test point itself, which is crucial for the detection of liquid crystal display modules that require precise measurement of the on-resistance, and can more accurately judge the connection status of the conductive silver paste body 6; in terms of corrosion resistance, in various complex production environments and usage environments, the test point may be exposed to different chemical substances, such as moisture in the air, chemical residues in the production process, etc. These substances may corrode the surface of the test point, affecting its conductivity and detection accuracy. Gold has strong chemical stability, and the gold-plated layer can effectively prevent these corrosive substances from corroding the test point, and keep the surface of the test point in good condition.

[0053] Furthermore, the surface of the AG dot main body 5 is provided with an anti-oxidation coating, and the material of the anti-oxidation coating is titanium nitride, which reduces and prevents the AG dot main body 5 from being oxidized during long-term use and affecting the conductive performance.

[0054] Obviously, the embodiments described above are only some of the embodiments of the present invention, rather than all of the embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention 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 invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present invention specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of protection of the present invention patent.

Claims

1. A liquid crystal display module, characterized in that: include: An LCD display module (1) and a main screen FPC (2) bound to the LCD display module (1), wherein the LCD display module (1) comprises a CF glass substrate (101) and a TFT glass substrate (102), wherein the CF glass substrate (101) is provided with an ITO coating film, and wherein the TFT glass substrate (102) is provided with two AG point bodies (5), wherein a first connecting member is provided between the two AG point bodies (5) and the ITO coating film, and wherein the main screen FPC (2) is provided with a first test point (3) and a second test point (4), wherein the first test point (3) and the second test point (4) are connected to the two AG point bodies (5) respectively.

2. The liquid crystal display module according to claim 1, wherein: The second test point (4) is connected to the grounding network of the main screen FPC (2).

3. The liquid crystal display module according to claim 1, wherein: The first connecting member is a conductive silver paste body (6), and the conductive silver paste body (6) is connected between the AG dot body (5) and the ITO coating.

4. The liquid crystal display module according to claim 3, wherein: A second connecting piece is connected between the first test point (3) and the second test point (4) and the two AG point bodies (5); the first test point (3) and the second test point (4) are connected to the two AG point bodies (5) via the second connecting piece.

5. The liquid crystal display module according to claim 4, wherein: The second connecting member comprises two connecting lines (7), and the two connecting lines (7) are respectively connected between the two AG point bodies (5) and the first test point (3) and the second test point (4).

6. The liquid crystal display module according to claim 1, wherein: The main screen FPC (2) is bound to the TFT glass substrate (102).

7. The liquid crystal display module according to claim 1, wherein: A driver IC (105) is also bound to the TFT glass substrate (102).

8. The liquid crystal display module according to claim 1, wherein: A side of the CF glass substrate (101) away from the TFT glass substrate (102) is connected to an upper polarizer (103), and a side of the TFT glass substrate (102) away from the CF glass substrate (101) is connected to a lower polarizer (104).

9. The liquid crystal display module according to claim 1, wherein: The surfaces of the first test point (3) and the second test point (4) have a gold-plated layer.

10. The liquid crystal display module according to claim 1, wherein: The surface of the AG point body (5) is provided with an anti-oxidation coating, and the material of the anti-oxidation coating is titanium nitride.

Images