Flexible printed circuit (FPC) for thin film transistor (TFT) module

Abstract

The utility model discloses an FPC for a TFT module group, the FPC for the TFT module group is connected on a backlight light guide plate, the backlight light guide plate is configured in a backlight iron stand, one side of the backlight light guide plate far away from the backlight iron stand is connected with a TFT main body, the backlight iron stand is provided with a groove, the FPC for the TFT module group comprises an FPC main body which is provided with a connecting end and a free end; an LED disposed on the surface of the FPC body; wherein the connecting end of the FPC main body is connected with the TFT main body, the free end of the FPC main body penetrates through the groove and forms a bent section, and the LED is guided to be located at the bent section and then abuts against the backlight light guide plate after penetrating through the free end of the FPC main body, and through cooperation of the FPC main body and the LED, rapid alignment of the LED and the backlight light guide plate is achieved on the basis that the FPC is saved.

Description

Technical Field

[0001] The utility model relates to the field of display modules, and in particular to an FPC for a TFT module. Background Art

[0002] The term "TFT" in display modules stands for Thin-Film Transistor. TFT is a specific type of field-effect transistor widely used in liquid crystal display (LCD) display technology to control the switching of individual pixels within the liquid crystal layer. TFT technology offers higher resolution, better image quality, and faster response times, making LCDs ideal for computer monitors, televisions, mobile phones, tablets, and many other electronic devices. A TFT LCD display module typically includes the following key components: TFT layer, color filter, liquid crystal layer, backlight unit, driver circuitry, packaging, and connectors.

[0003] TFT LCD display modules operate based on the optical properties of liquid crystal materials, which can change the state of polarized light. When a specific pixel receives an electrical signal, the corresponding TFT transistor changes voltage, which in turn alters the alignment of the liquid crystal molecules, controlling the amount of light passing through the pixel and ultimately forming an image. TFT LCD technology, with its advantages of low power consumption, thinness, and high resolution, has become one of the most common display technologies in portable electronic devices. However, without static protection for the product, the constant friction between the product and the blister during transportation can easily cause static damage.

[0004] For example, in the prior art, patent application number CN201520391609.6 discloses an FPC for TFT modules. This improved design combines the single main TFT FPC with the FPC circuitry for the module's backlight source on a single FPC board, incorporating the original backlight FPC structure into the combined FPC. Black ink is printed on the front of the FPC board to block light, while LED solder pads 7 and white ink are printed on the back to guide light, simplifying the design and fully utilizing the remaining area of ​​the main FPC.

[0005] Although the technical solution disclosed in the above patent document combines the TFT FPC and the backlight FPC into the same FPC, thereby eliminating the need for additional soldering of the backlight FPC AK electrode pins, there are still certain limitations in actual use, because the backlight FPC is mainly used in conjunction with the backlight LED, and the TFT FPC and the backlight source FPC are mostly independent of each other. The technical solution provided in the above patent document omits one FPC in order to reduce costs and does not require additional soldering of the backlight AKPIN. However, in actual operation, due to the presence of the backlight LED, it is still necessary to set up an independent LED welding pad, that is, the setting position of the backlight LED is uncertain, which makes it impossible to ensure that the LED is facing the light guide plate when it is subsequently combined with the light guide plate, and when the light guide plate is bent, it cannot be guaranteed that the surface of the FPC provided in the above patent document will not be affected. Utility Model Content

[0006] Based on this, it is necessary to provide an FPC for TFT module to address the above technical problems.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A TFT module FPC is connected to a backlight guide plate, which is disposed in a backlight iron frame. A TFT body is connected to the side of the backlight guide plate away from the backlight iron frame. The backlight iron frame has a groove. The TFT module FPC includes:

[0009] An FPC body having a connection end and a free end;

[0010] LED, which is arranged on the surface of the FPC body;

[0011] The connecting end of the FPC body is connected to the TFT body, and the free end passes through the groove to form a bent section, and after passing through, guides the LED to the bent section and then abuts against the backlight guide plate.

[0012] Furthermore, the distance between the side wall of the bent section of the FPC body and the backlight guide plate is at most equal to the thickness of the LED.

[0013] Furthermore, the shape of the groove matches the bending section of the FPC body, and the groove width of the groove is not less than the length of the bending section of the FPC body.

[0014] Furthermore, an anti-shake component is provided in the groove, and the anti-shake component is connected to the side wall of the bending section, and is used to guide the side wall of the bending section to always maintain a state of being in contact with the inner wall of the groove.

[0015] Furthermore, the inner side wall of the groove is provided with a stepped groove;

[0016] The anti-shake component is arranged in the stepped groove, and the surface of the anti-shake component is fixedly connected to the side wall of the bending section.

[0017] Furthermore, the step groove includes a step groove 1 arranged on the inner side wall of the groove, and the inner side wall of the step groove 1 is provided with a step groove 2;

[0018] The anti-shake component includes a main protective component arranged in ladder groove one, the side wall of the main protective component is provided with a boss that is inserted into ladder groove two, the main protective component is bonded to the side wall of the bending section, and the end of the main protective component close to the LED is provided with a supporting component for supporting the LED.

[0019] Furthermore, a surface of the bending section on one side away from the stepped groove has an anti-transmission layer for shaping the FPC body.

[0020] Furthermore, a supporting member bonded to the side wall of the bending section is provided in the groove, a stabilizing member is provided on the side of the bending section away from the supporting member, and a plurality of support columns passing through the FPC body and the stabilizing member are provided on the supporting member.

[0021] Furthermore, the length of the support column is at least equal to the sum of the thicknesses of the FPC body and the stabilizing member.

[0022] Furthermore, the length of the stabilizing member is equal to the height of the bending section.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The utility model realizes the rapid alignment of the LED and the backlight guide plate on the basis of saving FPC through the cooperation between the FPC body and the LED. Specifically, the connection end of the FPC body is directly guided to be connected with the TFT body, and then the free end is guided to pass through the groove to form a bent section. The LED is then located in the area where the bent section is located. Therefore, after the free end passes through the groove, the LED in the bent section can be guided to abut against the backlight guide plate. During the entire operation, the bent section corresponds to the backlight guide plate, so the LED can quickly abut against the backlight guide plate.

[0025] The utility model welds the LED to the TFT FPC, bends the FPC to the bottom, and passes through the outside of the backlight. The LED on the FPC faces the position of the backlight light guide plate to play a lighting role, thereby saving the backlight FPC. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the side view structure of the backlight iron frame in the prior art;

[0027] Figure 2 Schematic diagram of the main structure of TFT in the prior art;

[0028] Figure 3It is a schematic diagram of the top view of the backlight iron frame in the prior art;

[0029] Figure 4 This is a schematic diagram of the FPC main structure provided by the utility model;

[0030] Figure 5 A schematic diagram of the structure of the anti-shake component provided by the utility model;

[0031] Figure 6 A schematic diagram of the support structure provided by the utility model;

[0032] Figure 7 A schematic diagram of the groove structure provided by the utility model;

[0033] Figure 8 This is a schematic diagram of the backlight iron frame structure provided by the utility model.

[0034] The markings in the figure are as follows:

[0035] 1. Backlight light guide plate; 2. Backlight iron frame; 3. TFT body; 4. Groove; 5. FPC body; 6. LED; 7. Step groove; 8. Anti-shake component; 9. Step groove 1; 10. Step groove 2; 11. Main protection component; 12. Anti-transmission layer; 13. Support component; 14. Stabilizer; 15. Support column; 16. Support component. DETAILED DESCRIPTION

[0036] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0037] As described in the background technology, due to the existence of the backlight LED, it is also necessary to set up an independent LED welding pad, that is, the setting position of the backlight LED is uncertain, so that when it is subsequently matched with the light guide plate, it is impossible to ensure that the LED is facing the light guide plate, and when the light guide plate is bent, it is impossible to ensure that the FPC surface provided in the above patent document will not be affected (this is because the FPC surface provided in the above patent document has components such as pads, and when bending, it is impossible to control the pads and other parts so that they will not be at the bending part of the bending section).

[0038] In order to solve this technical problem, the utility model provides an FPC for a TFT module.

[0039] Specifically, please refer to Figures 1-8, TFT module FPC, TFT module FPC is connected to the backlight light guide plate 1, the backlight light guide plate 1 is arranged in the backlight iron frame 2, the side of the backlight light guide plate 1 away from the backlight iron frame 2 is connected to the TFT body 3, the backlight iron frame 2 has a groove 4, the TFT module FPC includes:

[0040] The FPC body 5 has a connection end and a free end;

[0041] LED6, which is arranged on the surface of the FPC body 5;

[0042] The connecting end of the FPC body 5 is connected to the TFT body 3 , and the free end passes through the groove 4 to form a bent section. After passing through, the LED 6 is guided to the bent section and then abuts against the backlight guide plate 1 .

[0043] The present invention realizes the rapid alignment of the LED and the backlight guide plate 1 on the basis of saving FPC through the cooperation between the FPC body 5 and the LED 6. Specifically, the connection end of the FPC body 5 is directly guided to be connected with the TFT body 3, and then the free end is guided to pass through the groove 4 to form a bent section. The LED 6 is located in the area where the bent section is located. Therefore, after the free end passes through the groove 4, the LED 6 in the bent section can be guided to abut against the backlight guide plate 1. During the entire operation, the bent section corresponds to the backlight guide plate 1, so the LED 6 can quickly abut against the backlight guide plate 1.

[0044] The utility model welds the LED to the TFT FPC, bends the FPC to the bottom, and passes through the outside of the backlight. The LED on the FPC faces the position of the backlight light guide plate to play a lighting role, thereby saving the backlight FPC.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] Please refer to Figure 1-3 The TFT module is connected to the backlight guide plate 1 with an FPC. The backlight guide plate 1 is arranged in the backlight iron frame 2. The side of the backlight guide plate 1 away from the backlight iron frame 2 is connected to the TFT body 3. The backlight iron frame 2 has a groove 4. The TFT module FPC includes:

[0049] The FPC body 5 has a connection end and a free end;

[0050] LED6, which is arranged on the surface of the FPC body 5;

[0051] The connecting end of the FPC body 5 is connected to the TFT body 3 , and the free end passes through the groove 4 to form a bent section. After passing through, the LED 6 is guided to the bent section and then abuts against the backlight guide plate 1 .

[0052] In some specific embodiments, the distance between the bent section sidewall of the FPC body 5 and the backlight light guide plate 1 is at most equal to the thickness of the LED 6. This arrangement is to ensure that the distance between the bent section sidewall and the backlight light guide plate 1 can accommodate the LED 6, and the bent section sidewall does not need to bend toward the backlight light guide plate 1 to achieve abutment between the LED 6 and the backlight light guide plate 1.

[0053] In some embodiments, the shape of the groove 4 matches the bent section of the FPC body 5, and the groove width of the groove 4 is not less than the length of the bent section of the FPC body 5. This is to prevent the inner sidewall of the groove 4 from scratching the FPC body 5.

[0054] The FPC for the TFT module provided in Example 1 is further optimized. An anti-shake component 8 is provided in the groove 4. The anti-shake component 8 is connected to the side wall of the bending section and is used to guide the side wall of the bending section to always remain in contact with the inner wall of the groove 4.

[0055] This setting is to make the bending section more stable and prevent shaking.

[0056] In some specific embodiments, the inner side wall of the groove 4 is provided with a stepped groove 7;

[0057] The anti-shake component 8 is disposed in the stepped groove 7 , and the surface of the anti-shake component 8 is fixedly connected to the side wall of the bending section.

[0058] The fixing method can be bonding.

[0059] In some specific embodiments, the stepped groove 7 includes a stepped groove 1 9 provided on the inner side wall of the groove 4 , and a stepped groove 2 10 is provided on the inner side wall of the stepped groove 1 9 ;

[0060] The anti-shake component 8 includes a main guard component 11 arranged in the ladder groove 1 9. The side wall of the main guard component 11 is provided with a boss that is inserted into the ladder groove 2 10 (the setting of the boss can prevent the main guard component 11 from loosening). The main guard component 11 is bonded to the side wall of the bending section. The end of the main guard component 11 close to the LED 6 is provided with a supporting component 16 for supporting the LED 6.

[0061] During daily use, since the connection between LED6 and the backlight guide plate 1 is not through welding or other methods that cannot be quickly removed, once it is used for a long time or the FPC body 5 becomes loose, LED6 is prone to tilting. In order to solve this problem, the main protective part 11 can be used to reduce the probability of the FPC body 5 loosening (the main protective part 11 is tightly connected to the FPC body 5), and at the same time, the supporting part 16 supports LED6, so that the probability of LED6 tilting is further reduced.

[0062] In some specific embodiments, the surface of the bending section away from the stepped groove 7 has an anti-permeability layer 12 for shaping the FPC body 5. The presence of the anti-permeability layer 12 can keep the bending section always as Figure 5 Status shown Figure 4 The point B in the middle refers to the bending section. Meanwhile, the anti-transmission layer 12 may be coated with black ink to reduce the light transmittance of the FPC body 5 .

[0063] The FPC for the TFT module provided in Example 1 or 2 is further optimized. A support member 13 bonded to the side wall of the bending section is provided in the groove 4, and a stabilizing member 14 is provided on the side of the bending section away from the support member 13. The support member 13 is provided with multiple support columns 15 that pass through the FPC body 5 and the stabilizing member 14.

[0064] Another embodiment is provided to address the phenomenon of loosening of the bending section. In this embodiment, both the FPC body 5 and the stabilizing member 14 are provided with plug-in holes that match the support column 15. During specific operation, the bending section is directly guided to be bonded to the supporting member 13, and then the stabilizing member 14 is bonded to the side of the bending section away from the supporting member 13. At the same time, the support column 15 is guided to pass through the FPC body 5 and the stabilizing member 14. In this operation, the support column 15 holds up the FPC body 5 and the stabilizing member 14, that is, the stability of the FPC body 5 is high, and the bending section will not be deformed due to the setting of the stabilizing member 14 (that is, after the stabilizing member 14 is set, the side of the bending section close to the TFT body 3 is subjected to increased tension and thus deformed. This situation also exists in Example 2).

[0065] In some embodiments, the length of the support column 15 is at least equal to the sum of the thicknesses of the FPC body 5 and the stabilizer 14. This configuration is to ensure that the support column 15 can fully support the FPC body 5 and the stabilizer 14.

[0066] In some specific embodiments, the length of the stabilizing member 14 is equal to the height of the bending section. This arrangement is to enable the stabilizing member 14 to fully shape the entire height direction of the bending section to prevent the bending section from twisting.

[0067] The usage process of the FPC for the TFT module provided by the utility model is as follows: the utility model realizes the rapid alignment of the LED and the backlight guide plate 1 on the basis of saving FPC through the cooperation between the FPC body 5 and the LED 6. Specifically, the connection end of the FPC body 5 is directly guided to be connected with the TFT body 3, and then the free end is guided to pass through the groove 4 to form a bending section. The LED 6 is located in the area where the bending section is located. Therefore, after the free end passes through the groove 4, the LED 6 in the bending section can be guided to abut against the backlight guide plate 1. During the entire operation process, the bending section corresponds to the backlight guide plate 1, so the LED 6 can quickly abut against the backlight guide plate 1.

[0068] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0069] 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 TFT module FPC, the TFT module FPC is connected to a backlight light guide plate (1), the backlight light guide plate (1) is arranged in a backlight iron frame (2), a TFT body (3) is connected to the side of the backlight light guide plate (1) away from the backlight iron frame (2), the backlight iron frame (2) has a groove (4), characterized in that: The TFT module FPC includes: An FPC body (5) having a connection end and a free end; An LED (6) is disposed on the surface of the FPC body (5); The connecting end of the FPC body (5) is connected to the TFT body (3), and the free end passes through the groove (4) to form a bent section, and after passing through, guides the LED (6) to be in the bent section and then abuts against the backlight guide plate (1).

2. The FPC for TFT module according to claim 1, characterized in that: The distance between the side wall of the bent section of the FPC body (5) and the backlight guide plate (1) is at most equal to the thickness of the LED (6).

3. The FPC for TFT module according to claim 1, characterized in that: The shape of the groove (4) matches the bent section of the FPC body (5), and the groove width of the groove (4) is not less than the length of the bent section of the FPC body (5).

4. The FPC for TFT module according to claim 2 or 3, characterized in that: An anti-shake component (8) is provided in the groove (4), and the anti-shake component (8) is connected to the side wall of the bending section and is used to guide the side wall of the bending section to always maintain a state of being in contact with the inner wall of the groove (4).

5. The FPC for TFT module according to claim 4, characterized in that: The inner side wall of the groove (4) is provided with a stepped groove (7); The anti-shake component (8) is arranged in the stepped groove (7), and the surface of the anti-shake component (8) is fixedly connected to the side wall of the bending section.

6. The FPC for TFT module according to claim 5, characterized in that: The step groove (7) comprises a step groove 1 (9) arranged on the inner side wall of the groove (4), and a step groove 2 (10) is arranged on the inner side wall of the step groove 1 (9); The anti-shake component (8) comprises a main protection component (11) arranged in the first ladder groove (9), the side wall of the main protection component (11) is provided with a boss that is inserted into the second ladder groove (10), the main protection component (11) is bonded to the side wall of the bending section, and the end of the main protection component (11) close to the LED (6) is provided with a supporting component (16) for supporting the LED (6).

7. The FPC for TFT module according to claim 6, characterized in that: A surface of one side of the bending section away from the stepped groove (7) is provided with an anti-transmission layer (12) for shaping the FPC body (5).

8. The FPC for TFT module according to claim 2 or 3, characterized in that: A support member (13) bonded to the side wall of the bending section is provided in the groove (4); a stabilizing member (14) is provided on a side of the bending section away from the support member (13); and a plurality of support columns (15) passing through the FPC body (5) and the stabilizing member (14) are provided on the support member (13).

9. The FPC for TFT module according to claim 8, characterized in that: The length of the support column (15) is at least equal to the sum of the thicknesses of the FPC body (5) and the stabilizing member (14).

10. The FPC for TFT module according to claim 8, characterized in that: The length of the stabilizing member (14) is equal to the height of the bending section.

Images