Mobile phone flexible display screen module and assembling method thereof

Abstract

The invention relates to the technical field of flexible display screens, and provides a mobile phone flexible display screen module and an assembling method thereof.The mobile phone flexible display screen module comprises a cover plate, a panel assembly and an under-screen supporting assembly, the cover plate and the panel assembly are connected through a bonding optical adhesive film, and the panel assembly and the under-screen supporting assembly are connected through a bonding optical adhesive film; the panel assembly comprises a DOT built-in touch layer, a thin film packaging layer, an organic light-emitting layer, a thin film transistor array layer and a PI flexible substrate. The DOT built-in touch layer, the thin film packaging layer, the organic light-emitting layer, the thin film transistor array layer and the PI flexible substrate are sequentially connected and pressed together; and the edge of the under-screen supporting assembly tilts upwards and wraps the panel assembly and the side face of the cover plate. By arranging the under-screen supporting assembly to wrap the side face of the panel assembly, the structure can effectively avoid the problem that the flexible display screen is prone to light leakage in the using process, and it is guaranteed that the flexible display screen can conduct normal display; the method is applied to the assembling process of the flexible display screen.

Description

Technical Field

[0001] The present invention relates to the technical field of flexible display screens, and in particular to a mobile phone flexible display screen module and an assembling method thereof. Background Art

[0002] Smartphones all have display modules, which are divided into flexible display modules and non-flexible display modules. Flexible display modules can diversify mobile phone screens. Currently, foldable screen phones, scroll screen phones, and even some curved screen phones on the market all use flexible display modules. Depending on the required performance, the structure of mobile phone flexible display modules is also different.

[0003] For example, a Chinese patent with a patent publication number of CN110660329A discloses a flexible display module and a flexible display device, wherein the flexible display module includes a flexible screen and a support assembly arranged on the back side of the flexible screen, wherein: the flexible screen includes a plurality of control areas arranged along the first extension direction of the flexible screen, the support assembly includes a plurality of capacitor plates, each control area has a control circuit, and the capacitor plates and the control circuit are electrically connected in sequence; the flexible screen is bent toward the back side, and any two capacitor plates can be turned on, and when the two opposite capacitor plates are turned on, the control area controlled by the control circuit between the two capacitor plates is not displayed. The flexible display device of this scheme can control the display area size of the flexible display module while the flexible display module is bent and unfolded, enriching the application scenarios and functions of the flexible display device.

[0004] The technical solution provided by the above patent has a flexible display module, but the existing flexible display module is prone to side light leakage after being used for a period of time, which in turn affects the display effect of the display. In addition, the flexible display needs to be inspected during the assembly process to determine whether the flexible display has defects. If the flexible display has defects, it needs to be scrapped in time. The existing detection of whether the flexible display has defects requires staff observation and detection. This detection method is inefficient and is not conducive to efficient detection of flexible displays. Summary of the invention

[0005] The purpose of the present invention is to provide a mobile phone flexible display screen module and an assembly method thereof, aiming to improve the problem that the existing flexible display screen module is prone to side light leakage after being used for a period of time, thereby affecting the display effect of the display screen, and the detection efficiency is low during the assembly process of the flexible display screen.

[0006] The present invention is achieved in that: In order to achieve the above-mentioned purpose, according to one aspect of the present invention, the present invention provides a mobile phone flexible display screen module, including a cover plate, a polarizer, a panel assembly and a support assembly under the screen, wherein the cover plate, the polarizer, the panel assembly and the support assembly under the screen are connected in sequence by bonding optical adhesive films; the panel assembly includes a DOT built-in touch layer, a thin film encapsulation layer, an organic light-emitting layer, a thin film transistor array layer and a PI flexible substrate; the DOT built-in touch layer, the thin film encapsulation layer, the organic light-emitting layer, the thin film transistor array layer and the PI flexible substrate are connected and pressed together in sequence; the edge of the support assembly under the screen is warped upwards and wraps the panel assembly and the side of the cover plate.

[0007] Furthermore, the cover plate includes a PET film and a CPI film, and the PET film and the CPI film are connected by a bonding optical adhesive film.

[0008] Furthermore, the under-screen support assembly includes a back support film, foam and a flexible support plate; the back support film, foam and flexible support plate are sequentially bonded and connected, and a flat cable is provided at the bottom of the flexible support plate, and the flat cable passes through the entire under-screen support assembly and is connected to the panel assembly.

[0009] According to a second aspect of the present invention, the present invention provides a method for assembling a flexible display screen module of a mobile phone, and the specific steps of the method are as follows: S100, prepare assembly materials and debug equipment; S200, cleaning the cover plate and bonding an optical adhesive film on the cover plate; S300, performing FOG pre-pressing on the cover plate and the panel assembly with the optical adhesive film attached, and performing FOG main pressing on the panel assembly and the cover plate after the FOG pre-pressing is completed; and attaching the adhesive optical adhesive film on the bottom of the panel assembly; S400, aligning and pressing the lower support assembly onto the bottom of the panel assembly; S500, transporting the assembled flexible display screen module to a defect detection device, and performing defect detection on the flexible display screen module through the defect detection device; S600, transferring the flexible display screen module that has been inspected for defects to an electrical testing station, and performing electrical testing on the flexible display screen module; S700: Pack the qualified flexible display screen modules and transfer the packaged flexible display screens to a warehouse for storage.

[0010] Furthermore, the steps of performing defect detection on the flexible display screen module in step S500 are as follows: S510, the robot arm of the assembly equipment grabs the flexible display screen module of the mobile phone onto the upper surface of the defect detection equipment, the defect detection equipment is provided with a lamp tube (54) inside, and the lamp tube (54) emits light to illuminate the flexible display screen module of the mobile phone; S520, pre-prepare template images for specific types of defects; and establish a defect template library based on the templates, where each template corresponds to a known defect type, and the template may be a small image block extracted from a known defect sample image; S530: The defect detection device is provided with a detection camera (7) to take a photo of the mobile phone flexible display screen module, and transmit the taken photo to the defect detection device for processing.

[0011] Furthermore, the defect detection equipment in step S500 includes a body, a light-transmitting plate and a detection camera; a mounting groove is provided on the top of the body, and a plurality of lamp tubes are evenly arranged inside the mounting groove; the light-transmitting plate is arranged at the top of the body, the detection camera is installed directly above the body, and the detection camera is fixed on the top of the body, and the detection camera is electrically connected to the body; the body is connected to a terminal device by wireless connection.

[0012] Furthermore, a control panel is provided on the front of the body, a plurality of pairs of mounting joints are provided inside the mounting groove, and the lamp tube is arranged between each pair of mounting joints; a support rod is provided at the rear end of the body, the support rod is in a U-shaped structure, and a threaded hole is provided at the end of the top of the support rod; a mounting plate is provided on one side of the back of the body, and a through hole is provided on the mounting plate near the top; a connecting wire is provided on one side of the body, and an electrical plug is provided at the end of the connecting wire; a central information processing unit is provided inside the body, and the central information processing unit is simultaneously connected to an image feature extraction module, an image feature processing module, an image feature comparison module, a defect judgment module and a recording alarm module.

[0013] Furthermore, a frame is provided at the edge of the light-transmitting plate, and an insert ring is provided at the bottom of the light-transmitting plate, and the insert ring is inserted into the inner side of the mounting groove at the top of the body.

[0014] Furthermore, a threaded connecting plate is provided at the top of the detection camera, and the threaded connecting plate is threadedly connected to the body; a shooting head is provided at the bottom of the detection camera, and a connecting line is provided at one side of the detection camera, and a connecting plug is provided at the end of the connecting line, and the connecting plug is plugged and connected to the body.

[0015] Furthermore, it also includes an electric push rod, which is attached to the back of the mounting plate, and the output end of the electric push rod passes through a through hole; the top and bottom of one end of the electric push rod attached to the back of the mounting plate are provided with fixed feet, and the fixed feet are provided with a plurality of fixing holes; the output end of the electric push rod is provided with a telescopic rod, and the end of the telescopic rod passing through the through hole is provided with a push plate; the bottom of the electric push rod is provided with a wire, and the end of the wire is provided with a plug connector, and the plug connector is connected to the body by plugging.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention wraps the side of the panel assembly by arranging an under-screen support assembly. This structure can effectively avoid the problem of light leakage that is prone to occur during the use of the flexible display screen, and ensure that the flexible display screen can display normally. During the assembly of the flexible display screen, the flexible screen passing through the defect detection equipment can be effectively photographed and identified by the defect detection equipment. After identifying that the flexible display screen has defects, an alarm is sent to the terminal, which is convenient for the staff to deal with the problematic flexible screen in time.

[0017] 2. Multiple defect detection devices can be set up during the assembly process of the flexible display screen. The defect detection devices can detect defects in time during the assembly process of the flexible display screen module and remind the staff.

[0018] 3. A push rod is provided at the bottom of the defect detection equipment, through which the defective display screen can be pushed out of the conveying equipment to prevent the defective flexible display screen from continuing to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a collection flexible display screen module of the present invention; Figure 2 It is a structural schematic diagram of the cover plate of the present invention; Figure 3 is a schematic structural diagram of a panel assembly of the present invention; Figure 4 It is a schematic structural diagram of the support layer under the screen of the present invention; Figure 5 is a schematic structural diagram of a defect detection device of the present invention; Figure 6 It is a structural schematic diagram of the body of the present invention; Figure 7 It is a schematic diagram of the structure of the light-transmitting plate of the present invention; Figure 8 It is a schematic diagram of the structure of the detection camera of the present invention; Fig. 9 It is a structural schematic diagram of the electric push rod of the present invention; Fig.10 It is a structural block diagram of the interior of the body of the present invention; Fig.11 is a flow chart of an algorithm for judging whether a flexible display screen module has defects according to the present invention; Fig.12 The present invention is a flow chart of the flexible display screen module assembly.

[0020] In the figure: 1. Cover plate; 11. PET film; 12. Optical adhesive film; 13. CPI film; 2. Polarizer; 3. Panel assembly; 31. DOT built-in touch layer; 32. Thin film encapsulation layer; 33. Organic light-emitting layer; 34. Thin film transistor array layer; 35. PI flexible substrate; 4. Under-screen support assembly; 40. Optical adhesive film; 41. Back support film; 42. Foam; 43. Flexible support plate; 44. Cable; 5. Body; 51. Control panel; 52. Mounting slot; 53, mounting joint; 54, lamp tube; 55, support rod; 56, threaded hole; 57, mounting plate; 58, perforation; 59, wire connection; 591, power plug; 6, light-transmitting plate; 61, frame; 62, plug ring; 7, detection camera; 71, threaded connecting plate; 72, shooting head; 73, communication line; 74, communication plug; 8, electric push rod; 81, fixing foot; 82, fixing hole; 83, telescopic rod; 84, push plate; 85, wire; 86, plug connector. DETAILED DESCRIPTION

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] The following is a further description with reference to the accompanying drawings and specific embodiments.

[0023] Example 1 like Figure 1 and Figure 3 As shown, a mobile phone flexible display screen module includes a cover plate 1, a polarizer 2, a panel assembly 3 and a screen support assembly 4, and the cover plate 1, the polarizer 2, the panel assembly 3 and the screen support assembly 4 are connected in sequence by bonding optical adhesive films 40. This structure can ensure that the entire flexible display screen module is sufficiently stable without affecting the display effect of the display screen. The panel assembly 3 includes a DOT built-in touch layer 31, a thin film encapsulation layer 32, an organic light-emitting layer 33, a thin film transistor array layer 34 and a PI flexible substrate 35. The DOT built-in touch layer 31, the thin film encapsulation layer 32, the organic light-emitting layer 33, the thin film transistor array layer 34 and the PI flexible substrate 35 are connected and pressed together in sequence. This structure constitutes the core panel assembly 3 of the flexible display screen, which enables the flexible display screen module to display images and operate. The edge of the screen support assembly 4 is tilted upward and wraps the side of the panel assembly 3 and the cover plate 1. This structure can avoid the problem of light leakage on the side of the flexible display screen module.

[0024] like Figure 2 As shown, the cover plate 1 includes a PET film 11 and a CPI film 13, and the PET film 11 and the CPI film 13 are connected by a bonding optical adhesive film 12. This structure enables the cover plate 1 to protect the panel assembly 3, while also ensuring the stable operation of the entire flexible display module and its flexibility.

[0025] like Figure 4 As shown, the under-screen support assembly 4 includes a back support film 41, a foam 42 and a flexible support plate 43. The back support film, the foam 42 and the flexible support plate 43 are sequentially attached and connected. This structure can support and protect the flexible display screen from the bottom of the flexible display screen. A flat cable 44 is provided at the bottom of the flexible support plate 43, and the flat cable 44 passes through the entire under-screen support assembly 4 and is connected to the panel assembly 3, which facilitates the normal use of the entire flexible display screen.

[0026] Example 2 like Fig.11 and Fig.12 As shown, a method for assembling a flexible display screen module for a mobile phone, the specific steps of the method are as follows: S100. Go to the warehouse to pick up the various materials used to assemble the flexible display module, and put the corresponding materials into the corresponding equipment. Before starting assembly, ensure that the assembly environment is a dust-free workshop with air cleanliness reaching ISO level 7 or higher. The temperature is maintained at 23℃±2℃ and the relative humidity is controlled at 50%±5%. Such an environment can prevent dust particles from contaminating the display and affecting the material performance during the assembly process.

[0027] S200, after the cover plate 1 is delivered to the assembly equipment, the assembly equipment will grab each cover plate 1 and send it to the plasma cleaning area for cleaning to ensure that there is no dust on the cover plate 1. Then, the optical adhesive film 40 is bonded to the bottom surface of the cover plate 1. Before cleaning, ensure that the plasma cleaning equipment is operating normally, check whether the components such as electrodes, gas pipelines, power supplies, etc. are intact, and whether the parameters such as the vacuum degree and gas flow of the equipment can meet the cleaning requirements; perform preliminary cleaning on the cover plate 1 to be cleaned, remove obvious impurities such as dust and particles on the surface, and prevent these impurities from affecting the effect of plasma cleaning. You can use a dust-free cloth to gently wipe the surface of the cover plate 1, or use simple blowing and other methods for preliminary cleaning. Select a suitable cleaning gas according to the material of the cover plate 1 and the type of contaminant. Common cleaning gases include oxygen, argon, hydrogen, nitrogen, etc. For example, oxygen can effectively remove organic pollutants, and argon is mainly used for physical bombardment and surface etching. Place the prepared cover plate 1 on the workbench of the plasma cleaning equipment to ensure that the cover plate 1 is placed stably and can fully contact the plasma. If batch cleaning is performed, a dedicated fixture or carrier may be used to fix the cover plate 1 to ensure the consistency of cleaning 5.

[0028] Close the door of the cleaning equipment, start the vacuum pump to start vacuuming, so that the vacuum degree in the cleaning chamber reaches the set standard. Usually the vacuum degree needs to reach about 10Pa, and the specific vacuum degree requirements depend on the equipment and cleaning process. The vacuuming time is generally a few minutes to ensure that the air in the chamber is fully extracted. When the vacuum degree reaches the requirement, the pre-selected cleaning gas is introduced into the cleaning chamber through the gas pipeline, and the gas pressure is kept stable. Control the gas flow and pressure according to the cleaning requirements and equipment performance.

[0029] A high-frequency voltage is applied between the electrode and the grounding device of the cleaning chamber to break down the gas and generate plasma. The active particles in the plasma will chemically react with the pollutants on the surface of the cover plate 1, converting the pollutants into gaseous substances, thereby achieving the purpose of cleaning. In this process, it is necessary to control parameters such as voltage and frequency to ensure the generation of plasma and the cleaning effect.

[0030] The generated plasma is covered on the surface of the cover plate 1, and the cleaning operation begins. The cleaning time is determined according to the degree of contamination of the cover plate 1 and the cleaning requirements, and generally lasts from tens of seconds to tens of minutes. After the cleaning is completed, the power is cut off and the introduction of the cleaning gas is stopped. The gaseous pollutants generated during the cleaning process are extracted from the cleaning chamber using a vacuum pump, and then the air pressure in the cleaning chamber is slowly restored to normal pressure.

[0031] S300, the cover plate 1 with the optical adhesive film 12 is transported to the assembly station of the panel assembly 3. The equipment will align the panel assembly 3 with the cover plate 1, and then perform FOG pre-pressing on the panel assembly 3 and the cover plate 1. After the FOG pre-pressing is completed, the panel assembly 3 and the cover plate 1 assembly will be subjected to FOG main pressing. Then, the adhesive optical adhesive film 40 is attached to the bottom of the panel assembly 3. The specific process is as follows: After the alignment of the panel assembly 3 and the cover plate 1 is completed, the pressure head of the pre-pressing equipment begins to descend, and a certain pressure is applied to the panel assembly 3 and the cover plate 1. The pressure is usually between a few Newtons and tens of Newtons. The specific value depends on the product requirements and the characteristics of the material. The role of the pressure is to make the panel assembly 3 and the cover plate 1 initially contact, expel the air between the two, and avoid the generation of bubbles in the subsequent main pressing process.

[0032] During the pre-pressing process, the panel assembly 3 and the cover plate 1 are heated simultaneously to improve the viscosity and fluidity of the ACF and enhance the pre-pressing effect. The heating temperature is generally between 50℃ and 100℃, and the heating time ranges from a few seconds to tens of seconds 5. After applying pressure and heating, a certain amount of time is maintained to allow the ACF to initially solidify at a lower temperature and pressure to form a preliminary connection. The pre-pressing time is usually around 1-5 seconds.

[0033] After the pre-pressing is completed, the pressure head is lifted, and the pre-pressed panel assembly 3 and cover plate 1 assembly are taken out to check the pre-pressing effect, such as whether there are alignment deviations, bubbles, indentations, etc. If the pre-pressing effect is not ideal, it is necessary to adjust the equipment parameters or re-perform the pre-pressing.

[0034] S400, transport the assembled panel assembly 3 and cover plate 1 assembly to the assembly station of the under-screen support assembly 4, align and press the under-screen support assembly 4 to the bottom of the panel assembly 3, and make the raised edge of the under-screen support assembly 4 stably fit on the sides of the panel assembly 3 and the cover plate 1 assembly. The height of the raised edge of the support assembly 4 needs to be measured. The specific measurement uses the principle of optical interference to project a beam of light onto the surface of the cover plate 1 and the edge of the support assembly 4, and calculate the raised height by analyzing the interference fringes of the reflected light; an optical interferometer is required. Place the display screen on the workbench of the interferometer, and adjust the optical path of the interferometer so that the light beam can illuminate the edge of the support assembly 4 and the surrounding plane area. Observe the changes in the interference fringes. When there is edge lift, the interference fringes will bend or offset. According to the amount of change in the interference fringes and the wavelength of interference (Known value, generally in the visible light wave range, such as 500-700mm) Calculate the edge lift height H, the specific calculation formula is: ; in, is the change in the interference fringes, is the wavelength of interference, and H is the height of the edge warping. The edge warping of the support component 4 should be controlled within a very small range, generally not exceeding 0.1 - 0.2 mm. When the edge warping exceeds or is less than this range, it is necessary to determine that the edge warping of the support component 4 is unqualified.

[0035] S500, the flexible display screen module composed of the cover plate 1, the panel assembly 3 and the under-screen support assembly 4 is transported to the defect detection device, and the flexible display screen module is photographed and identified by the defect detection device, and a calculation is performed to determine whether there is a defect. If there is a defect, the result is fed back to the terminal in time and recorded. The steps for defect detection of the flexible display screen module are as follows: S510, the manipulator of the assembly equipment grabs the flexible display screen module of the mobile phone onto the upper surface of the defect detection equipment, and the defect detection equipment is provided with a lamp tube 54 inside, and the lamp tube 54 emits light to illuminate the flexible display screen module of the mobile phone; S520, for a specific type of defect (such as a bad pixel of a known shape and pattern, a foreign body of a specific shape, etc.), a template image is pre-made; based on this, a defect template library is established, each template corresponds to a known defect type, and the template can be a small image block extracted from a known defect sample image; S530, the defect detection device is provided with a detection camera 7 to take a photo of the mobile phone flexible display screen module, and transmit the taken photo to the defect detection device for processing; S540: After receiving the captured display screen image, the defect detection device uses an algorithm to slide the template on the display screen image for matching. ( is the pixel coordinate in the template), display screen image , and then calculate the correlation coefficient between the captured display screen image and the template. The specific calculation formula is: A x,y = ∑ m ∑ n T m,n - T ¯ [I x+m,y+n - I x,y ] ¯ ∑ m ∑ n T m,n - T ¯ 2 ∑ m ∑ n [ I x+m,y+n - I x,y ] 2 ¯ ; in, is the average gray value of the template, is in the image China-Israel is the average gray value of the area with the same center size as the template, is the correlation coefficient between the captured display screen image and the template; When it is greater than 0.5, it is considered The defect similar to the template was matched at the location; the threshold was 0.5. The sample images with known defects and without defects were used for statistical analysis. First, in the image with known defects, the distribution of the correlation coefficient between the template and the defect area was calculated. 100 display screen images with defects of different degrees and types were collected, and the correlation coefficient of template matching was calculated to obtain the mean of these coefficients. and standard deviation , and the threshold setting follows the formula (For detecting defects, Generally, it is 1-3), which can minimize false detections while ensuring a certain detection rate. , ,Pick , the threshold is 0.5.

[0036] S550, Judgment Is the value greater than 0.5? If the value of is greater than 0.5, it is judged that the current flexible display screen module has defects. At this time, the defect detection device will push the current flexible display screen module away from the defect detection device; if If the value is less than 0.5, the robot arm of the assembly equipment will continue to operate to grab it and place it on the conveyor belt for transportation.

[0037] S600, transfer the flexible display screen module that has been inspected for defects to the electrical testing station, conduct electrical testing on the flexible display screen module, and use professional display screen testing equipment to test the electrical performance of the display screen module. This includes checking whether the pixels of the display screen are working properly, whether the display brightness and contrast meet the standards, and whether the color display is accurate. At the same time, it is also necessary to test whether the electrical connection between the panel assembly and the driver chip is normal, whether the signal transmission is stable, and the assembled flexible display screen module is subjected to a certain degree of bending test. Simulate the bending of the mobile phone in daily use, and check whether the display screen has display abnormalities, circuit disconnection, and other problems during the bending process. The bending radius and number of times are set according to the actual requirements of the mobile phone design. For example, the bending radius can be set to 5-10mm, and the number of bending times is 1000-5000 times. Flexible display screen modules that cannot be used normally are scrapped.

[0038] S700. Package the qualified flexible display screen modules and transfer the packaged flexible display screens to the warehouse for storage. Flexible display screens are sensitive to temperature. Generally speaking, the storage temperature should be kept between -10℃ and 35℃. Within this temperature range, the material properties inside the display screen are relatively stable. If the temperature is too high, such as exceeding 40℃, the organic materials in the display screen (such as the organic layer in the organic light-emitting diode) may age faster, resulting in problems such as decreased luminous efficiency and color shift. If the temperature is too low, such as below -10℃, the display screen may become fragile and prone to damage such as cracks during subsequent use.

[0039] Example 3 like Figure 5 , Figure 6 and Fig.10 As shown, the defect detection equipment in Example 2 includes a body 5, a light-transmitting plate 6 and a detection camera 7. A mounting groove 52 is provided at the top of the body 5, and a plurality of lamp tubes 54 are evenly arranged inside the mounting groove 52. The mounting groove 52 is convenient for installing the lamp tube 54, so as to facilitate the light emission of the upper surface of the body 5. The light-transmitting plate 6 is arranged at the top of the body 5, which is convenient for supporting the flexible display screen assembly. The detection camera 7 is installed directly above the body 5, and the detection camera 7 is fixed on the top of the body 5, and the detection camera 7 is electrically connected to the body 5. This structure facilitates the detection camera 7 to capture images and transmit them back to the body 5. The body 5 is connected to a terminal device by wireless connection, so that data on the body 5 is fed back to the terminal device.

[0040] like Figure 6 and Fig.10As shown, a control panel 51 is provided on the front of the body 5, and the control panel 51 is convenient for controlling the operation of the entire device. A plurality of pairs of mounting joints 53 are provided inside the mounting groove 52, and a lamp tube 54 is arranged between each pair of mounting joints 53. The mounting joint 53 facilitates the installation of the lamp tube 54. A support rod 55 is provided at the rear end of the body 5, and the support rod 55 is in a U-shaped structure, and a threaded hole 56 is provided at the end of the top of the support rod 55. The support rod 55 cooperates with the threaded hole 56 to facilitate the installation of the detection camera 7 and the flexible use of the detection camera 7. A mounting plate 57 is provided on one side of the back of the body 5, and a through hole 58 is provided near the top of the mounting plate 57. The mounting plate 57 is convenient for installing external components. A connection wire 59 is provided on one side of the body 5, and an electrical plug 591 is provided at the end of the connection wire 59. The wire 85 and the electrical plug 591 are convenient for powering on the body 5. The central information processing unit is provided inside the body 5, and the central information processing unit is convenient for simultaneously connecting the central information processing unit with an image feature extraction module, an image feature processing module, an image feature comparison module, a defect judgment module and a recording alarm module. This structure is convenient for processing and judging the pictures taken by the detection camera 7.

[0041] like Figure 7 As shown, the edge of the light-transmitting plate 6 is provided with a frame 61, and the bottom of the light-transmitting plate 6 is provided with an insert ring 62, which is inserted into the inner side of the mounting groove 52 at the top of the body 5. The frame 61 cooperates with the insert ring 62 to facilitate the disassembly and use of the light-transmitting plate 6.

[0042] like Figure 8 As shown, a threaded connection plate 71 is provided on the top of the detection camera 7, and the threaded connection plate 71 is threadedly connected to the body 5. This structure is convenient for the detection camera 7 to be threadedly connected and fixed to the body 5. A shooting head 72 is provided at the bottom of the detection camera 7, and the shooting head 72 is convenient for shooting the flexible display screen module. A communication line 73 is provided on one side of the detection camera 7, and a communication plug 74 is provided at the end of the communication line 73, and the communication plug 74 is plugged and connected to the body 5. This structure is convenient for the detection camera 7 to be connected to the body 5.

[0043] Example 4 like Figure 5 , Figure 6 and Fig.10 As shown, the defect detection equipment in Example 2 includes a body 5, a light-transmitting plate 6 and a detection camera 7. A mounting groove 52 is provided at the top of the body 5, and a plurality of lamp tubes 54 are evenly arranged inside the mounting groove 52. The mounting groove 52 is convenient for installing the lamp tube 54, so as to facilitate the light emission of the upper surface of the body 5. The light-transmitting plate 6 is arranged at the top of the body 5, which is convenient for supporting the flexible display screen assembly. The detection camera 7 is installed directly above the body 5, and the detection camera 7 is fixed on the top of the body 5, and the detection camera 7 is electrically connected to the body 5. This structure facilitates the detection camera 7 to capture images and transmit them back to the body 5. The body 5 is connected to a terminal device by wireless connection, so that data on the body 5 is fed back to the terminal device.

[0044] like Figure 6 and Fig.10 As shown, a control panel 51 is provided on the front of the body 5, and the control panel 51 is convenient for controlling the operation of the entire device. A plurality of pairs of mounting joints 53 are provided inside the mounting groove 52, and a lamp tube 54 is arranged between each pair of mounting joints 53. The mounting joint 53 facilitates the installation of the lamp tube 54. A support rod 55 is provided at the rear end of the body 5, and the support rod 55 is in a U-shaped structure, and a threaded hole 56 is provided at the end of the top of the support rod 55. The support rod 55 cooperates with the threaded hole 56 to facilitate the installation of the detection camera 7 and the flexible use of the detection camera 7. A mounting plate 57 is provided on one side of the back of the body 5, and a through hole 58 is provided near the top of the mounting plate 57. The mounting plate 57 is convenient for installing external components. A connection wire 59 is provided on one side of the body 5, and an electrical plug 591 is provided at the end of the connection wire 59. The wire 85 and the electrical plug 591 are convenient for powering on the body 5. The central information processing unit is provided inside the body 5, and the central information processing unit is convenient for simultaneously connecting the central information processing unit with an image feature extraction module, an image feature processing module, an image feature comparison module, a defect judgment module and a recording alarm module. This structure is convenient for processing and judging the pictures taken by the detection camera 7.

[0045] like Figure 7 As shown, the edge of the light-transmitting plate 6 is provided with a frame 61, and the bottom of the light-transmitting plate 6 is provided with an insert ring 62, which is inserted into the inner side of the mounting groove 52 at the top of the body 5. The frame 61 cooperates with the insert ring 62 to facilitate the disassembly and use of the light-transmitting plate 6.

[0046] like Figure 8 As shown, a threaded connection plate 71 is provided on the top of the detection camera 7, and the threaded connection plate 71 is threadedly connected to the body 5. This structure is convenient for the detection camera 7 to be threadedly connected and fixed to the body 5. A shooting head 72 is provided at the bottom of the detection camera 7, and the shooting head 72 is convenient for shooting the flexible display screen module. A communication line 73 is provided on one side of the detection camera 7, and a communication plug 74 is provided at the end of the communication line 73, and the communication plug 74 is plugged and connected to the body 5. This structure is convenient for the detection camera 7 to be connected to the body 5.

[0047] like Figure 6 and Fig.10As shown, it also includes an electric push rod 8, which is convenient for pushing the defective flexible display screen module out of the defect detection device. The electric push rod 8 is attached to the back of the mounting plate 57, and the output end of the electric push rod 8 passes through the through hole 58. This structure is convenient for the disassembly and assembly of the electric push rod 8. The top and bottom of one end of the electric push rod 8 attached to the back of the mounting plate 57 are both provided with fixed feet 81, and the fixed feet 81 are provided with a plurality of fixing holes 82. The fixed feet 81 are convenient for fixing the electric push rod 8 by bolts. A telescopic rod 83 is provided at the output end of the electric push rod 8, and a push plate 84 is provided at one end of the telescopic rod 83 passing through the through hole 58. The telescopic rod 83 cooperates with the push plate 84 to facilitate it to push the defective flexible display screen module. A wire 85 is provided at the bottom of the electric push rod 8, and a plug connector 86 is provided at the end of the wire 85, and the plug connector 86 is plugged and connected to the body 5. It is convenient for the electric push rod 8 to be connected to the body 5.

[0048] Working principle: when in use, the lamp 54 is turned on, which is convenient for the detection camera 7 to have a good shooting environment. The detection camera 7 transmits the photographed flexible display screen module to the machine body 5, and the machine body 5 extracts and judges the image features. When it is determined that the flexible display screen module has defects, the electric push rod 8 will work to push it out of the defect detection device. When it is determined that the flexible display screen module has no defects, the robot arm of the assembly device will grab the flexible display screen module and replace it with another flexible display screen module to be detected.

[0049] In summary, compared with the prior art, the present application wraps the side of the panel assembly 3 by setting the under-screen support assembly 4. This structure can effectively avoid the problem of light leakage during the use of the flexible display screen, and ensure that the flexible display screen can display normally. During the assembly of the flexible display screen, the defect detection equipment can effectively photograph and identify the flexible screen passing through the defect detection equipment, and send an alarm to the terminal after identifying the presence of defects in the flexible display screen, so that the staff can deal with the problematic flexible screen in time.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mobile phone flexible display screen module, comprising a cover plate (1), a polarizer (2), a panel assembly (3) and an under-screen support assembly (4), characterized in that: The cover plate (1), the polarizer (2), the panel assembly (3) and the under-screen support assembly (4) are connected in sequence via an adhesive optical film (40); the panel assembly (3) comprises a DOT built-in touch layer (31), a thin film encapsulation layer (32), an organic light-emitting layer (33), a thin film transistor array layer (34) and a PI flexible substrate (35); the DOT built-in touch layer (31), the thin film encapsulation layer (32), the organic light-emitting layer (33), the thin film transistor array layer (34) and the PI flexible substrate (35) are connected and pressed together in sequence; the edge of the under-screen support assembly (4) is raised upwards and wraps around the panel assembly (3) and the side surfaces of the cover plate (1).

2. A mobile phone flexible display screen module according to claim 1, characterized in that: The cover plate (1) comprises a PET film (11) and a CPI film (13), and the PET film (11) and the CPI film (13) are connected via a bonding optical adhesive film (12).

3. The mobile phone flexible display screen module according to claim 1, characterized in that: The under-screen support assembly (4) comprises a back support film (41), foam (42) and a flexible support plate (43); the back support film (41), foam (42) and flexible support plate (43) are sequentially bonded and connected, and a flat cable (44) is provided at the bottom of the flexible support plate (43); the flat cable (44) passes through the entire under-screen support assembly (4) and is connected to the panel assembly (3).

4. A method for assembling a mobile phone flexible display screen module, used for assembling the mobile phone flexible display screen module according to any one of claims 1 to 3, characterized in that: The specific steps of this method are as follows: S100, prepare assembly materials and debug equipment; S200, cleaning the cover plate (1), and bonding an optical adhesive film (40) to the cover plate (1); S300, performing FOG pre-pressing on the cover plate (1) and the panel assembly (3) bonded with the optical adhesive film (12), and after the FOG pre-pressing is completed, performing FOG main pressing on the panel assembly (3) and the cover plate (1); and bonding the optical adhesive film (40) on the bottom of the panel assembly (3); S400, aligning and pressing the lower support assembly (4) onto the bottom of the panel assembly (3); S500, transporting the assembled flexible display screen module to a defect detection device, and performing defect detection on the flexible display screen module through the defect detection device; S600, transferring the flexible display screen module that has been inspected for defects to an electrical testing station, and performing electrical testing on the flexible display screen module; S700: Pack the qualified flexible display screen modules and transfer the packaged flexible display screens to a warehouse for storage.

5. The method for assembling a flexible display screen module for a mobile phone according to claim 4, characterized in that: The steps of performing defect detection on the flexible display screen module in step S500 are as follows: S510, the robot arm of the assembly equipment grabs the flexible display screen module of the mobile phone onto the upper surface of the defect detection equipment, the defect detection equipment is provided with a lamp tube (54) inside, and the lamp tube (54) emits light to illuminate the flexible display screen module of the mobile phone; S520, pre-prepare template images for specific types of defects; and establish a defect template library based on the templates, where each template corresponds to a known defect type, and the template may be a small image block extracted from a known defect sample image; S530: The defect detection device is provided with a detection camera (7) to take a photo of the mobile phone flexible display screen module, and transmit the taken photo to the defect detection device for processing.

6. The method for assembling a flexible display screen module for a mobile phone according to claim 4, characterized in that: The defect detection device in step S500 comprises a body (5), a light-transmitting plate (6) and a detection camera (7); a mounting groove (52) is provided at the top of the body (5), and a plurality of light tubes (54) are evenly arranged inside the mounting groove (52); the light-transmitting plate (6) is arranged at the top of the body (5), the detection camera (7) is installed directly above the body (5), and the detection camera (7) is fixed on the top of the body (5), and the detection camera (7) is electrically connected to the body (5); the body (5) is connected to a terminal device by wireless connection.

7. The method for assembling a flexible display screen module for a mobile phone according to claim 6, characterized in that: The front of the machine body (5) is provided with a control panel (51), the interior of the installation slot (52) is provided with a plurality of pairs of installation joints (53), and the lamp tube (54) is arranged between each pair of installation joints (53); the rear end of the machine body (5) is provided with a support rod (55), the support rod (55) is in a U-shaped structure, and the end of the top of the support rod (55) is provided with a threaded hole (56); the back side of the machine body (5) is provided with a mounting plate (57), and the mounting plate (57) is provided with a through hole (58) near the top; the side of the machine body (5) is provided with a connection wire (59), and the end of the connection wire (59) is provided with an electric plug (591); the interior of the machine body (5) is provided with a central information processing unit, and the central information processing unit is simultaneously connected to an image feature extraction module, an image feature processing module, an image feature comparison module, a defect judgment module, and a recording alarm module.

8. The method for assembling a flexible display screen module for a mobile phone according to claim 6, characterized in that: The edge of the light-transmitting plate (6) is provided with a frame (61), and the bottom of the light-transmitting plate (6) is provided with an insert ring (62), and the insert ring (62) is inserted into the inner side of the mounting groove (52) at the top end of the body (5).

9. The method for assembling a flexible display screen module for a mobile phone according to claim 6, characterized in that: A threaded connection plate (71) is provided at the top of the detection camera (7), and the threaded connection plate (71) is threadedly connected to the body (5); a shooting head (72) is provided at the bottom of the detection camera (7), and a connecting line (73) is provided on one side of the detection camera (7), and a connecting plug (74) is provided at the end of the connecting line (73), and the connecting plug (74) is plugged and connected to the body (5).

10. The method for assembling a flexible display screen module for a mobile phone according to claim 7, characterized in that: It also comprises an electric push rod (8), the electric push rod (8) being attached to the back of the mounting plate (57), and the output end of the electric push rod (8) passing through the through hole (58); the top and bottom of one end of the electric push rod (8) attached to the back of the mounting plate (57) are both provided with fixing feet (81), and the fixing feet (81) are provided with a plurality of fixing holes (82); the output end of the electric push rod (8) is provided with a telescopic rod (83), and one end of the telescopic rod (83) passing through the through hole (58) is provided with a push plate (84); the bottom of the electric push rod (8) is provided with a wire (85), and the end of the wire (85) is provided with a plug connector (86), and the plug connector (86) is plug-connected to the machine body (5).

Images