A flexible and precise packaging structure for OLED automobile tail lamp repair

Abstract

The utility model relates to the technical field of automobile tail lamp flexible packaging, specifically discloses a kind of flexible accurate packaging structure for OLED automobile tail lamp maintenance, including flexible substrate, the outer surface of the flexible substrate is preset with main FPC circuit layer, the side of the flexible substrate in main FPC circuit layer is provided with vice FPC circuit layer, the notch of annular accommodating groove is covered and pasted with flexible sealing film.The flexible accurate packaging structure for OLED automobile tail lamp maintenance, through the use of annular accommodating groove, sheet type fiber desiccant can be placed and stored, and through the use of flexible sealing film, sheet type fiber desiccant will not fall out of annular accommodating groove, so that moisture can pass through flexible sealing film and be absorbed by sheet type fiber desiccant, cooperate with the use of silica gel sealing frame and epoxy sealant, so that the packaging structure can withstand high temperature, high humidity and vibration, to solve the probability of packaging delamination cracking caused by vibration and high humidity.

Description

Technical Field

[0001] This utility model relates to the field of flexible packaging technology for automotive taillights, specifically a flexible and precise packaging structure for OLED automotive taillight repair. Background Technology

[0002] With the development and advancement of automotive technology, more and more technologies are being applied to automobiles. Common car taillights have gradually evolved from halogen bulbs to LED lights and are increasingly using OLED taillights. OLED taillights are being used in high-end models such as Audi, BMW, and Hongqi. However, their maintenance faces three major technical challenges: First, taillights operate under complex conditions of ≥150℃ high temperature, 95%RH or higher high humidity, and vibration below 10Hz. Traditional packaging structures are prone to interface delamination and cracking, leading to short circuits or signal attenuation in the 10μm-level FPC circuitry. Firstly, the traditional dispensing / encapsulation process lacks precision and cannot meet the micron-level encapsulation requirements of FPC circuits, resulting in a repair yield of less than 70%. Secondly, repairs rely on replacing the entire lamp, which is not only costly (e.g., the replacement price for a single Audi OLED taillight is 7,500 yuan) but also takes 1-2 days. Furthermore, the industry lacks dedicated encapsulation structures adapted to repair scenarios, making it difficult to achieve modular and precise repairs and meet the high-efficiency repair needs after the large-scale application of OLED technology. These shortcomings together form the background for developing a flexible and precise encapsulation structure for OLED automotive taillight repair. Utility Model Content

[0003] The purpose of this invention is to provide a flexible and precise packaging structure for the repair of OLED automotive taillights, in order to solve the problems mentioned in the background art, such as taillights being prone to delamination and cracking due to high temperature and high humidity, and the insufficient precision of traditional dispensing.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a flexible precision packaging structure for OLED automotive taillight repair, comprising a flexible substrate, a main FPC circuit layer pre-set on the outer surface of the flexible substrate, a secondary FPC circuit layer disposed on one side of the flexible substrate located on the main FPC circuit layer, an annular receiving groove formed on the outer surface of the flexible substrate, the annular receiving groove surrounding the main FPC circuit layer and the secondary FPC circuit layer, a sheet fiber desiccant placed inside the annular receiving groove, the sheet fiber desiccant not exceeding the height of the annular receiving groove, and the depth of the annular receiving groove being equal to the thickness of the sheet fiber desiccant, a flexible sealing film covering and pasted at the opening of the annular receiving groove, the outer surface of the flexible sealing film being in contact with the outer surface of the sheet fiber desiccant, and micro-through holes uniformly formed on the outer surface of the flexible sealing film.

[0005] Preferably, the outer surface of the flexible substrate is provided with positioning bosses, the outer surface of the edge of the main FPC circuit layer is provided with positioning holes, and the outer surface of the flexible substrate is provided with visual calibration marks.

[0006] By adopting the above technical solution, the positioning boss, positioning hole and visual calibration mark are used and positioned in conjunction with the commonly used AI vision system to achieve the accuracy and yield of packaging, which can greatly improve the accuracy when performing packaging glue or other processes.

[0007] Preferably, a silicone sealing frame is integrally formed at the outer periphery of the flexible substrate, and the side of the silicone sealing frame closest to the sub-FPC circuit layer is coated with epoxy sealant, and the epoxy sealant is resistant to high temperature.

[0008] Using the above technical solution, the flexible substrate is a PI substrate, which can be adapted to OLED automotive taillights with different curvatures. The epoxy sealant applied can improve the sealing performance of the encapsulation structure under high temperature and vibration environments, prevent short circuit protection degradation of FPC circuits, and solve the problem of insufficient reliability in traditional packaging.

[0009] Preferably, the outer surface of the IC chip on the outer surface of the main FPC circuit layer is coated with flexible thermally conductive adhesive, and a thermally conductive block is attached and fixed to the outer surface of the flexible thermally conductive adhesive. A pressure sensor is fixedly disposed on the outer surface of the thermally conductive block, and the pressure sensor is connected to the secondary FPC circuit layer.

[0010] By adopting the above technical solution, the use of flexible thermal conductive adhesive allows the heat generated by the IC chip during the use of the main FPC circuit layer to be conducted to the heat-conducting block through the flexible thermal conductive adhesive. This enables the IC chip to better transfer heat and perform passive heat dissipation, improving the temperature stability of the IC chip during use. Furthermore, the pressure sensor installed on the pressure sensor ensures the uniformity of force and the quality and efficiency of hot pressing when using a multi-segment temperature-controlled hot press to hot press the taillight.

[0011] Preferably, the outer surface of the secondary FPC circuit layer is provided with another positioning hole, which is inserted into the positioning boss, and the outer surface of the positioning boss is in contact with the outer surface of the positioning hole. The positioning hole and the positioning boss are concentrically designed, and the secondary FPC circuit layer, the main FPC circuit layer and the flexible substrate are bonded together by double-sided adhesive.

[0012] By adopting the above technical solution, the main FPC circuit layer and the sub-FPC circuit layer can be positioned and connected through the positioning boss and positioning hole. When the main FPC circuit layer or the sub-FPC circuit layer is damaged, the main FPC circuit layer or the sub-FPC circuit layer can be disassembled and removed separately, realizing modular disassembly and assembly to quickly replace the damaged parts without replacing the entire car taillight, which greatly reduces the repair cost of OLED taillights.

[0013] Preferably, the outer surface of the flexible sealing film has a groove, and the groove is designed in a cross shape. A tear-off lug is fixed on one side of the outer surface of the flexible sealing film. A humidity sensor is attached to the outer surface of the flexible sealing film, and one end of the humidity sensor passes through the groove. The outer surface of the humidity sensor is in contact with the outer surface of the sheet fiber desiccant.

[0014] Using the above technical solution, the groove allows the humidity sensor to pass through easily while maintaining the closure of the annular receiving groove. After a period of use, when the humidity sensor detects that the sheet fiber desiccant is too wet and cannot be used, the taillight can be disassembled and the flexible sealing film can be removed by hand by tearing off the lugs. Then, a new sheet fiber desiccant can be replaced and a new flexible sealing film can be pasted on again. When the humidity of the sheet fiber desiccant exceeds 90%RH, a warning signal can be sent to the vehicle's ECU through the secondary FPC circuit layer.

[0015] Preferably, a data recording chip is soldered onto the outer surface of the sub-FPC circuit layer, and a temperature sensor is fixedly mounted on the outer surface of the heat-conducting block. The temperature sensor, humidity sensor, and pressure sensor are connected to the sub-FPC circuit layer.

[0016] By adopting the above technical solution, the temperature sensor can record and monitor the real-time temperature of the packaging structure when the taillight is working in real time and for a long period of time. If the temperature exceeds the set warning temperature, an alarm can be triggered. The data recording chip can save abnormal data and records, and store the time of replacement parts so that it can be traced. This helps maintenance personnel to improve the efficiency of maintenance and the convenience of maintenance and use.

[0017] Compared with the prior art, the beneficial effects of this utility model are: the flexible and precise encapsulation structure for OLED automotive taillight repair: 1. The use of an annular receiving groove allows for the placement and storage of sheet fiber desiccant. The use of a flexible sealing film prevents the sheet fiber desiccant from falling out of the annular receiving groove, allowing moisture to pass through the flexible sealing film and be absorbed by the sheet fiber desiccant. Combined with the use of silicone sealing frame and epoxy sealant, the encapsulation structure can withstand high temperature, high humidity and vibration, thereby reducing the chance of encapsulation delamination and cracking caused by vibration and high humidity. 2. The use of positioning bosses and positioning holes can position and limit the main FPC circuit layer and the sub-FPC circuit layer on the flexible substrate, so that the main FPC circuit layer and the sub-FPC circuit layer can be placed and installed in the accurate position. With the use of visual calibration marks, the AI ​​visual recognition system can be used to achieve precise positioning during encapsulation and adhesive application, which greatly improves the packaging yield. 3. Furthermore, when the flexible packaging structure is damaged, the OLED automotive taillight can be removed to replace the damaged main FPC circuit layer or sub-FPC circuit layer. This allows the main FPC circuit layer and sub-FPC circuit layer to be removed and replaced individually without replacing the entire OLED taillight, greatly reducing the cost of OLED taillight repair and minimizing material waste. 4. The overall encapsulation structure uses a silicone sealing frame and a flexible substrate, which can be adapted to OLED automotive taillights with different curvatures. This allows the flexible substrate to deform and fit perfectly with the outer shell of the automotive taillight, and can improve the sealing performance during encapsulation, preventing short circuits or signal attenuation between the main FPC circuit layer and the secondary FPC circuit layer. The use of epoxy sealant further enhances the reliability of the encapsulation process. 5. Pressure sensors can monitor the pressure during hot pressing of the packaging, ensuring the accuracy of the pressure during hot pressing and greatly shortening the hot pressing cycle. Humidity and temperature sensors can monitor the humidity and temperature of the sheet fiber desiccant, and a data logging chip stores and records abnormal data, allowing for fault diagnosis during maintenance and repair, improving efficiency and convenience. The monitored data can also provide feedback on the taillight's working status and whether parts need to be replaced. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the flexible substrate and circuit layer of this utility model; Figure 2 This is a three-dimensional exploded view of the flexible substrate and flexible sealing film of this utility model; Figure 3 This is an exploded three-dimensional structural diagram of the FPC circuit layer and positioning holes of this utility model; Figure 4 This is a three-dimensional structural diagram of the FPC circuit layer and the sub-FPC circuit layer of this utility model; Figure 5 This is a three-dimensional exploded view of the flexible thermally conductive adhesive and thermally conductive block of this utility model; Figure 6 This is a three-dimensional exploded view of the heat-conducting block and pressure sensor of this utility model.

[0019] In the diagram: 1. Flexible substrate; 2. Main FPC circuit layer; 3. Positioning boss; 4. Annular receiving groove; 5. Sheet fiber desiccant; 6. Flexible sealing film; 7. Visual calibration mark; 8. Flexible thermally conductive adhesive; 9. Thermally conductive block; 10. Pressure sensor; 11. Silicone sealing frame; 12. Epoxy sealant; 13. Groove; 14. Humidity sensor; 15. Secondary FPC circuit layer; 16. Data logging chip; 17. Temperature sensor; 18. Tearable lug; 19. Positioning hole. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-6 This utility model provides a technical solution: a flexible precision packaging structure for OLED automotive taillight repair, including a flexible substrate 1, a main FPC circuit layer 2 pre-set on the outer surface of the flexible substrate 1, a silicone sealing frame 11 integrally formed at the outer periphery of the flexible substrate 1, and an epoxy sealant 12 coated on the side of the silicone sealing frame 11 near the secondary FPC circuit layer 15, and the epoxy sealant 12 is heat resistant, a secondary FPC circuit layer 15 is disposed on one side of the flexible substrate 1 located on the main FPC circuit layer 2, and an opening is formed on the outer surface of the flexible substrate 1. There is an annular receiving groove 4, which surrounds the main FPC circuit layer 2 and the sub FPC circuit layer 15. The annular receiving groove 4 contains sheet fiber desiccant 5, and the sheet fiber desiccant 5 does not exceed the height of the annular receiving groove 4. The depth of the annular receiving groove 4 is the same as the thickness of the sheet fiber desiccant 5. The opening of the annular receiving groove 4 is covered with a flexible sealing film 6, and the outer surface of the flexible sealing film 6 is in contact with the outer surface of the sheet fiber desiccant 5. The outer surface of the flexible sealing film 6 is uniformly provided with micro-through holes.

[0022] Firstly, during use, the flexibility of the flexible substrate 1 and the main FPC circuit layer 2 allows them to change shape and contact and adhere to the housing of the LIED automotive taillight during encapsulation. The annular receiving groove 4 allows the sheet fiber desiccant 5 to be placed, and the flexible sealing film 6 is used to stick and encapsulate it, preventing the sheet fiber desiccant 5 from shifting or falling off. This allows the sheet fiber desiccant 5 to absorb moisture inside the automotive taillight after encapsulation. The epoxy sealant 12 and the silicone sealing frame 11 ensure that the automotive taillight encapsulation reduces delamination and cracking caused by vibration and high temperature, greatly improving the stability and lifespan of the encapsulation mechanism.

[0023] Positioning bosses 3 are respectively formed on the outer surface of the flexible substrate 1, positioning holes 19 are respectively formed on the outer surface of the edge of the main FPC circuit layer 2, visual calibration marks 7 are provided on the outer surface of the flexible substrate 1, and other positioning holes 19 are formed on the outer surface of the secondary FPC circuit layer 15. The positioning holes 19 are inserted into the positioning bosses 3, and the outer surface of the positioning bosses 3 is in contact with the outer surface of the positioning holes 19. The positioning holes 19 and the positioning bosses 3 are concentrically designed. The secondary FPC circuit layer 15, the main FPC circuit layer 2 and the flexible substrate 1 are bonded together by double-sided adhesive.

[0024] Secondly, the main FPC circuit layer 2 and the secondary FPC circuit layer 15 can be positioned by the positioning boss 3 and the positioning hole 19, and then fixed to the flexible substrate 1 by double-sided adhesive. This facilitates the installation and positioning of the main FPC circuit layer 2 and the secondary FPC circuit layer 15. Furthermore, the visual calibration mark 7 set on the flexible substrate 1 allows for more accurate encapsulation and adhesive application, further improving the convenience and accuracy of installing and replacing the main FPC circuit layer 2 and the secondary FPC circuit layer 15.

[0025] The outer surface of the IC chip on the outer surface of the main FPC circuit layer 2 is coated with flexible thermal conductive adhesive 8, and a thermally conductive block 9 is attached and fixed to the outer surface of the flexible thermally conductive adhesive 8. A pressure sensor 10 is fixedly installed on the outer surface of the thermally conductive block 9, and the pressure sensor 10 is connected to the secondary FPC circuit layer 15. A data recording chip 16 is soldered to the outer surface of the secondary FPC circuit layer 15. A temperature sensor 17 is fixedly installed on the outer surface of the thermally conductive block 9, and the temperature sensor 17, humidity sensor 14, and pressure sensor 10 are connected to the secondary FPC circuit layer 15.

[0026] Furthermore, the flexible thermally conductive adhesive 8 can conduct heat to the IC chip of the main FPC circuit layer 2, allowing the temperature of the IC chip of the main FPC circuit layer 2 to be conducted to the heat-conducting block 9 for auxiliary heat dissipation. The pressure sensor 10 can ensure the accuracy of the pressure during hot pressing of the packaging structure. At the same time, the data recording chip 16 can record abnormal data of the temperature sensor 17 and the pressure sensor 10. The temperature sensor 17 and the humidity sensor 14 can monitor the temperature of the car taillight and the humidity of the sheet fiber desiccant 5. When the temperature and the sheet fiber desiccant 5 exceed the set values, feedback can be sent to the vehicle system, reducing the need for inspection and replacement of the car taillight and the sheet fiber desiccant 5, and greatly improving the convenience and efficiency of maintenance.

[0027] The outer surface of the flexible sealing film 6 has a groove 13, which is a cross-shaped design. A hand-tearable lug 18 is fixed on one side of the outer surface of the flexible sealing film 6. A humidity sensor 14 is attached to the outer surface of the flexible sealing film 6, and one end of the humidity sensor 14 passes through the groove 13. The outer surface of the humidity sensor 14 is attached to the outer surface of the sheet fiber desiccant 5.

[0028] Furthermore, when the humidity of the sheet fiber desiccant 5 exceeds the set value of the humidity sensor 14 after absorbing moisture, the car taillight needs to be disassembled. Then, the flexible sealing film 6 can be removed by hand by tearing off the lug 18 and the sheet fiber desiccant 5 can be replaced. After that, the new sheet fiber desiccant 5 can be placed into the annular receiving groove 4, and the humidity sensor 14 can be removed, inserted into the slot 13 and pasted. Then, the flexible sealing film 6 can be pasted on top of the annular receiving groove 4 to complete the replacement of the sheet fiber desiccant 5. This allows the sheet fiber desiccant 5 to be replaced instead of the entire flexible substrate 1, which greatly reduces the maintenance and use cost of the packaging structure.

[0029] Working principle: During use, the sheet fiber desiccant 5 needs to be placed into the annular receiving groove 4 and the humidity sensor 14 needs to be inserted into the slot 13. Then, the flexible sealing film 6 can be pasted and fixed on the outer surface of the flexible substrate 1 to complete the fixation of the sheet fiber desiccant 5. Afterwards, the AI ​​vision device is assisted in positioning by the visual calibration mark 7, the positioning boss 3 and the positioning hole 19 to connect the main FPC circuit layer 2 and the secondary FPC circuit layer 15 through the positioning hole 19 and the positioning boss 3 and fix them with double-sided tape. The heat conduction block 9 is fixed to the outer surface of the IC chip by the flexible thermal conductive adhesive 8. The main FPC circuit layer 2, the secondary FPC circuit layer 15, the pressure sensor 10, the humidity sensor 14 and the temperature sensor 17 are connected together. The epoxy sealant 12 can be applied to one side of the silicone sealing frame 11 by the dispensing machine. Then, the flexible substrate 1 with the installed parts and the car taillight housing and other parts can be placed in the multi-stage temperature-controlled hot press for hot pressing to complete the assembly of the OLED car taillight.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flexible precision packaging structure for OLED automotive taillight repair, comprising a flexible substrate (1), wherein a main FPC circuit layer (2) is pre-set on the outer surface of the flexible substrate (1), and a secondary FPC circuit layer (15) is disposed on one side of the main FPC circuit layer (2) on the flexible substrate (1), characterized in that: The outer surface of the flexible substrate (1) is provided with an annular receiving groove (4), and the annular receiving groove (4) is arranged around the main FPC circuit layer (2) and the sub FPC circuit layer (15). The annular receiving groove (4) contains a sheet fiber desiccant (5), and the sheet fiber desiccant (5) does not exceed the height of the annular receiving groove (4). The depth of the annular receiving groove (4) is the same as the thickness of the sheet fiber desiccant (5). The groove opening of the annular receiving groove (4) is covered with a flexible sealing film (6), and the outer surface of the flexible sealing film (6) is in contact with the outer surface of the sheet fiber desiccant (5). The outer surface of the flexible sealing film (6) is uniformly provided with micro-through holes.

2. The flexible precision packaging structure for OLED automotive taillight repair according to claim 1, characterized in that: The flexible substrate (1) has positioning bosses (3) on its outer surface, the main FPC circuit layer (2) has positioning holes (19) on its outer edge surface, and the flexible substrate (1) has visual calibration marks (7) on its outer surface.

3. The flexible precision packaging structure for OLED automotive taillight repair according to claim 1, characterized in that: The flexible substrate (1) has an integrally formed silicone sealing frame (11) at its outer periphery, and the silicone sealing frame (11) is coated with epoxy sealant (12) on the side close to the sub-FPC circuit layer (15), and the epoxy sealant (12) is resistant to high temperature.

4. The flexible precision packaging structure for OLED automotive taillight repair according to claim 1, characterized in that: The outer surface of the IC chip on the outer surface of the main FPC circuit layer (2) is coated with flexible thermal conductive adhesive (8), and a thermal conductive block (9) is attached and fixed on the outer surface of the flexible thermal conductive adhesive (8). A pressure sensor (10) is fixed on the outer surface of the thermal conductive block (9), and the pressure sensor (10) is connected to the sub FPC circuit layer (15).

5. The flexible precision packaging structure for OLED automotive taillight repair according to claim 3, characterized in that: The outer surface of the sub-FPC circuit layer (15) is provided with another positioning hole (19). The positioning hole (19) is inserted into the positioning boss (3), and the outer surface of the positioning boss (3) is in contact with the outer surface of the positioning hole (19). The positioning hole (19) and the positioning boss (3) are concentrically designed. The sub-FPC circuit layer (15), the main FPC circuit layer (2) and the flexible substrate (1) are bonded together by double-sided adhesive.

6. The flexible precision packaging structure for OLED automotive taillight repair according to claim 1, characterized in that: The outer surface of the flexible sealing film (6) is provided with a groove (13), and the groove (13) is a cross-shaped design. A hand-tearable lug (18) is fixed on one side of the outer surface of the flexible sealing film (6). A humidity sensor (14) is attached to the outer surface of the flexible sealing film (6), and one end of the humidity sensor (14) passes through the groove (13). The outer surface of the humidity sensor (14) is attached to the outer surface of the sheet fiber desiccant (5).

7. The flexible precision packaging structure for OLED automotive taillight repair according to claim 4, characterized in that: A data recording chip (16) is soldered onto the outer surface of the sub-FPC circuit layer (15), and a temperature sensor (17) is fixedly installed on the outer surface of the heat-conducting block (9). The temperature sensor (17), humidity sensor (14), and pressure sensor (10) are connected to the sub-FPC circuit layer (15).

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