Foldable electronic equipment, flexible display screen assembly and preparation method of flexible display screen assembly

Abstract

The invention provides foldable electronic equipment, a flexible display screen assembly and a preparation method of the flexible display screen assembly. The flexible display screen assembly comprises a flexible display screen module and a bendable ultra-thin glass sheet, the flexible display screen module is provided with a through hole used for lighting of the camera. The bendable ultra-thin glass sheet covers the light emitting surface of the flexible display screen module; wherein a shading ink layer is arranged at the position, corresponding to the through hole, of the ultra-thin glass sheet, and the shading ink layer is of an annular structure and is used for shading the edge circumference of the through hole. According to the flexible display screen assembly provided by the embodiment of the invention, the shading ink layer is arranged on the side, corresponding to the flexible display screen module, of the bendable ultra-thin glass sheet, so that the camera lighting through hole of the flexible display screen module can be shielded, deformation of other material layers is avoided, the lighting influence on a camera is further reduced, and the user experience is improved. And the shooting quality of the camera is improved.

Description

Technical Field

[0001] The present application relates to the technical field of flexible display screens, and in particular to a foldable electronic device, a flexible display screen assembly, and a method for preparing the same. Background Art

[0002] In conventional technical solutions, the inner screen camera hole of foldable screen mobile phones cannot be effectively shielded, so there are jagged edges or light leakage can be seen directly from the display edge of the camera hole. In addition, some technical solutions use ink layer structures for shielding, but in conventional technical solutions, due to the incorrect setting of the ink position, it is easy to cause the glue layer or protective film layer corresponding to the camera hole position to deform, affecting the camera shooting effect. Summary of the invention

[0003] A first aspect of an embodiment of the present application provides a flexible display screen assembly, the flexible display screen assembly comprising:

[0004] The flexible display screen module is provided with a through hole for camera lighting;

[0005] A bendable ultra-thin glass sheet, covering the light-emitting surface of the flexible display screen module;

[0006] Wherein, the ultra-thin glass sheet is provided with a light-shielding ink layer at a position corresponding to the through hole, and the light-shielding ink layer is a ring-shaped structure, which is used to shield the edge circumference of the through hole.

[0007] In a second aspect, an embodiment of the present application provides a foldable electronic device, which includes a flexible display assembly according to any one of the above embodiments.

[0008] In a third aspect, an embodiment of the present application provides a method for preparing a flexible display screen assembly, the method comprising:

[0009] Providing an ultra-thin glass sheet;

[0010] forming a light-shielding ink layer in a ring-shaped structure in a preset area of ​​the ultra-thin glass sheet;

[0011] The ultra-thin glass sheet is aligned and bonded to the flexible display screen module; wherein the light-shielding ink layer is arranged corresponding to the through hole of the flexible display screen module.

[0012] The flexible display screen assembly provided in the embodiment of the present application can shield the camera lighting holes of the flexible display screen module while avoiding deformation of other material layers, thereby reducing the lighting impact on the camera and improving the shooting quality of the camera, by arranging a light-shielding ink layer on the side of the bendable ultra-thin glass sheet corresponding to the flexible display screen module. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 is a schematic structural diagram of a foldable electronic device in an embodiment of the present application when it is in an unfolded state;

[0015] Figure 2 yes Figure 1 A schematic diagram of the structure of the electronic device in the embodiment when it is in a folded state;

[0016] Figure 3 yes Figure 1 A schematic cross-sectional view of the electronic device at position AA in the embodiment;

[0017] Figure 4 is a block diagram of an electronic device according to an embodiment of the present application;

[0018] Figure 5 yes Figure 1 A schematic cross-sectional view of a local structure of an electronic device in an embodiment;

[0019] Figure 6 yes Figure 1 A schematic front view of a partial structure of an electronic device in an embodiment;

[0020] Figure 7 This is a schematic diagram of a display screen stacking structure in a conventional technical solution;

[0021] Figure 8 is a schematic diagram of another stacked structure of the flexible display assembly of the present application;

[0022] Fig. 9 It is a schematic flow chart of an embodiment of a method for preparing a flexible display screen assembly of the present application;

[0023] Fig.10 It is a schematic diagram of another embodiment of the method for preparing a flexible display screen assembly of the present application;

[0024] Fig.11 It is a schematic diagram of the structure of an ultra-thin glass sheet after a protective film made of resin material is attached. DETAILED DESCRIPTION

[0025] The present application is further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application rather than all embodiments, and all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0026] The terms "first", "second", and "third" in the embodiments of the present application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", and "third" can expressly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of the present application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. The terms "including" and "having" in the embodiments of the present application and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or components inherent to these processes, methods, products, or devices.

[0027] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] As used herein, "electronic devices" (or simply "terminals") include, but are not limited to, devices configured to receive / send communication signals via a wireline connection (e.g., via a public switched telephone network (PSTN), a digital subscriber line (DSL), a digital cable, a direct cable connection, and / or another data connection / network) and / or via a wireless interface (e.g., for a cellular network, a wireless local area network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and / or another communication terminal). Communication terminals configured to communicate via a wireless interface may be referred to as "wireless communication terminals", "wireless terminals" or "mobile terminals". Examples of mobile terminals include, but are not limited to, satellite or cellular phones; personal communication system (PCS) terminals that may combine cellular radiotelephones with data processing, fax, and data communication capabilities; PDAs that may include radiotelephones, pagers, Internet / intranet access, web browsers, organizers, calendars, and / or global positioning system (GPS) receivers; and conventional laptop and / or palmtop receivers or other electronic devices that include radiotelephone transceivers. A mobile phone is an electronic device equipped with a cellular communication module.

[0029] The present application provides a foldable electronic device. Figures 1 to 3 , Figure 1 is a schematic structural diagram of a foldable electronic device in an embodiment of the present application when it is in an unfolded state; Figure 2 yes Figure 1 A schematic diagram of the structure of the electronic device in the embodiment when it is in a folded state; Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure of the electronic device in the embodiment at AA. It should be noted that the electronic device in the present application may include electronic devices with foldable flexible display screens such as mobile phones, tablet computers, laptop computers, and wearable devices. The electronic device 10 includes but is not limited to the following structures: a housing mechanism 100, a flexible display screen assembly 200, and a circuit assembly 300.

[0030] For more details, please refer to Figure 2 and Figure 3 The housing mechanism 100 includes a first housing 110, a second housing 120 and a shaft assembly 130; the first housing 110 and the second housing 120 are respectively connected to the shaft assembly 130, and the first housing 110 and the second housing 120 can rotate with the shaft assembly 130; the detailed structure of the shaft assembly is within the scope of understanding of those skilled in the art and will not be repeated here. The flexible display assembly 200 is respectively connected to the first housing 110 and the second housing 120 and is arranged across the shaft assembly 130. The flexible display assembly 200 can rotate with the relative rotation (along the axis) of the first housing 110 and the second housing 120. Figure 3in the direction of the double arrow) and fold ( Figure 2 mid state) or flattened ( Figure 1 medium state).

[0031] Optionally, the circuit assembly 300 may include a battery 310 and a control circuit board 320, etc. In addition, the electronic device may also include a camera, a speaker, and various sensors, etc. The detailed features of this part are within the scope of understanding of those skilled in the art and will not be repeated here.

[0032] See also Figure 4 , Figure 4 It is a block diagram of the composition of an electronic device of an embodiment of the present application. The electronic device can be a foldable mobile phone, a tablet computer, a laptop computer, a wearable device, etc. The diagram of this embodiment takes a foldable mobile phone as an example. The structure of the electronic device 10 may include an RF circuit 910, a memory 920, an input unit 930, a display unit 940 (which may be the flexible display screen assembly 200 in the above embodiment), a sensor 950, an audio circuit 960, a wifi module 970, a processor 980 (which may be the control circuit board 320 in the above embodiment) and a power supply 990 (which may be the battery 310 in the above embodiment), etc. Among them, the RF circuit 910, the memory 920, the input unit 930, the display unit 940, the sensor 950, the audio circuit 960 and the wifi module 970 are respectively connected to the processor 980; the power supply 990 is used to provide power to the entire electronic device 10.

[0033] Specifically, the RF circuit 910 is used to receive and send signals; the memory 920 is used to store data instruction information; the input unit 930 is used to input information, which may specifically include a touch panel 931 and other input devices 932 such as operation buttons; the display unit 940 may include a display panel 941, etc.; the sensor 950 includes an infrared sensor, a laser sensor, etc., for detecting user approach signals, distance signals, etc.; the speaker 961 and the microphone (or microphone) 962 are connected to the processor 980 through the audio circuit 960 for receiving and sending sound signals; the wifi module 970 is used to receive and transmit wifi signals, and the processor 980 is used to process data information of the electronic device. For the specific structural features of the electronic device, please refer to the relevant description of the above embodiment, which will not be described in detail here.

[0034] Please also read Figure 1 , Figure 5 as well as Figure 6 , Figure 5 yes Figure 1 A schematic cross-sectional view of a local structure of an electronic device in an embodiment, Figure 6 yes Figure 1A schematic front view of a partial structure of an electronic device in the embodiment, wherein the flexible display screen assembly 200 in the embodiment comprises a flexible display screen module 210 and a bendable ultra-thin glass sheet 220. The flexible display screen module 210 is provided with a through hole 211 for the camera 500 to collect light, and the bendable ultra-thin glass sheet 220 is covered on the light-emitting surface of the flexible display screen module 210; wherein the ultra-thin glass sheet 220 is provided with a light-shielding ink layer 230 at a position corresponding to the through hole 211.

[0035] Optionally, the light-shielding ink layer 230 in this embodiment is an annular structure, which is used to block the edge circumference of the through hole 211, and the center of the light-shielding ink layer 230 coincides with the center of the through hole 211. The light-shielding ink layer 230 can be formed on the ultra-thin glass sheet 220 by silk screen printing or pad printing. Optionally, the thickness of the ultra-thin glass sheet is 20-60um, specifically 20um, 30um, 35um, 40um, 50um, 60um and other values, and the thickness of the light-shielding ink layer is 2-10um, specifically 2um, 3um, 4um, 5um, 5.5um, 6um, 8um, 10um and other values.

[0036] Optionally, see Figure 5 In this embodiment, the ultra-thin glass sheet 220 and the flexible display screen module 210 are bonded by a first optical adhesive layer 240, and the first optical adhesive layer 240 is hollowed out at the position corresponding to the through hole 211. The thickness of the first optical adhesive layer 240 is 20-60um, and can be specifically 20um, 30um, 35um, 40um, 50um, 60um, etc.

[0037] See also Figure 7 , Figure 7 It is a schematic diagram of a display screen stacking structure in a conventional technical solution, wherein the ink layer 10a is arranged on the surface of the flexible protective film 10b and is bonded to the surface of the ultra-thin glass sheet 10d through the optical glue 10c. The problem of this solution is that, first, the ink layer 10a is formed on the flexible protective film 10b. After lamination, the height difference of the ink layer 10a at the corresponding position of the camera hole 10e causes uneven optical glue 10c, and microscopic wrinkles 10z appear in the laminate (including the optical glue 10c and the flexible protective film 10b) at the corresponding position of the hole, resulting in a decrease in the resolution of the camera, thereby affecting the user's photo-taking experience; in order to reduce the influence of the above-mentioned wrinkles, the thickness of the ink layer 10a will be sacrificed, resulting in the risk of light transmission in this area; in addition, in the solution of forming the ink layer 10a on the flexible protective film 10b, since the ink layer 10a needs to be dried, the high temperature resistance requirements of the flexible protective film 10b are relatively high, either it is slowly baked at a low temperature, or the flexible protective film 10b is prone to deformation. Among them, the marked 10f in the figure is also the optical adhesive layer, and the marked 10g is the flexible screen module.

[0038] The technical solution in the embodiment of the present application solves the above-mentioned problem. By using the process of screen printing ink on the ultra-thin glass sheet, the back is hollowed out without optical glue filling, avoiding the lamination wrinkles existing in the conventional technical solution that affect the front resolution, and can greatly improve the product image expression. The process of screen printing ink on the ultra-thin glass sheet can avoid the problem of light leakage caused by the reduced shading ability due to the thin ink thickness in the conventional technical solution. In addition, the process of screen printing ink on the ultra-thin glass sheet can avoid the selection requirements of the flexible protective film in the conventional technical solution.

[0039] See also Figure 8 , Figure 8 : is a schematic diagram of another stacked structure of the flexible display screen assembly of the present application. The flexible display screen assembly 200 in this embodiment includes a flexible display screen module 210, a bendable ultra-thin glass sheet 220 and a protective film 250. The flexible display screen module 210 is provided with a through hole 211 for lighting of the camera 500, and the bendable ultra-thin glass sheet 220 is covered on the light-emitting surface of the flexible display screen module 210; wherein, the ultra-thin glass sheet 220 is provided with a light-shielding ink layer 230 at a position corresponding to the through hole 211. The light-shielding ink layer 230 is an annular structure, which is used to block the edge circumference of the through hole 211, and the center of the light-shielding ink layer 230 coincides with the center of the through hole 211. wherein, the light-shielding ink layer 230 can be formed on the ultra-thin glass sheet 220 by silk screen printing or pad printing. The ultra-thin glass sheet 220 and the flexible display screen module 210 are bonded together via a first optical adhesive layer 240 , and the first optical adhesive layer 240 is hollowed out at positions corresponding to the through holes 211 .

[0040] Optionally, the protective film 250 is attached to the side of the ultra-thin glass sheet 220 away from the flexible display module 210 through the second optical adhesive layer 260. The protective film 250 is made of resin, specifically transparent polyimide (Colorless Polyimide, CPI for short), and is used to protect the ultra-thin glass sheet 220.

[0041] The flexible display screen module 210 includes a stacked flexible display screen substrate 201 and a polarizer 202 , an ultra-thin glass sheet 220 is bonded to the polarizer 202 , and a through hole 211 penetrates the flexible display screen substrate 201 , the polarizer 202 and the first optical adhesive layer 240 .

[0042] Optionally, the thickness of the ultra-thin glass sheet can be 20-60um, specifically 20um, 30um, 35um, 40um, 50um, 60um and other values, and the thickness of the light-shielding ink layer is 2-10um, specifically 2um, 3um, 4um, 5um, 5.5um, 6um, 8um, 10um and other values. The thickness of the first optical adhesive layer 240 is 20-60um, specifically 20um, 30um, 35um, 40um, 50um, 60um and other values. The thickness of the protective film 250 is 20-60um, specifically 20um, 30um, 35um, 40um, 50um, 60um and other values. The thickness of the second optical adhesive layer 260 is 20-60um, specifically 20um, 30um, 35um, 40um, 50um, 60um and other values.

[0043] The flexible display screen assembly provided in the embodiment of the present application can shield the camera lighting holes of the flexible display screen module while avoiding deformation of other material layers, thereby reducing the lighting impact on the camera and improving the shooting quality of the camera, by arranging a light-shielding ink layer on the side of the bendable ultra-thin glass sheet corresponding to the flexible display screen module.

[0044] In addition, the present invention also provides a method for preparing a flexible display screen assembly. Fig. 9 , Fig. 9 1 is a flow chart of an embodiment of a method for preparing a flexible display screen assembly of the present application, and the preparation method includes but is not limited to the following steps.

[0045] Step S100, providing an ultra-thin glass sheet.

[0046] The ultra-thin glass sheet is bendable glass with a thickness of 20-60um.

[0047] Please continue reading Fig. 9 The preparation method further includes step S200, forming a light-shielding ink layer with a ring structure in a preset area of ​​the ultra-thin glass sheet.

[0048] Among them, the preset area is a through hole area corresponding to the flexible display screen module.

[0049] Specifically, the light-shielding ink layer can be formed by silk screen printing or pad printing. The process is as follows: incoming materials - thinning - inspection - trimming - lamination - CNC - edge processing - debonding - slicing - cleaning - strengthening - surface strengthening - laminating - silk screen printing or pad printing of light-shielding ink layer - baking - cleaning - laminating - 2PB full inspection - cleaning - pasting shipping film.

[0050] Among them, the process parameters of the screen printing light-shielding ink layer are as follows: Covering masking film: Use an automatic laminating machine to laminat the hollow masking film at the camera through-hole position. Screen printing black oil: Use an automatic screen printing machine, screen mesh 165T, viscosity 6000-8000mpa.s, pre-bake 150±10℃, time 3±1min, and require a hundred-grid grade ≥4B; or pad printing black oil: four-channel glass pad printing machine, equipment air pressure 6±1MPa oil cup running speed 250-300mm / s, anti-static rubber head hardness 30°±2° smooth surface, rubber head left and right speed 800±200mm / s, rubber head preheating 100°±20° time 3S±2, rubber head ink taking height 160±20mm, ink upper line viscosity 3500-4000mpa.s, baking 150±10℃, time 30±1min, and require a hundred-grid grade ≥4B.

[0051] Please continue reading Fig. 9 The preparation method further includes step S300, aligning and bonding the ultra-thin glass sheet and the flexible display module.

[0052] The light-shielding ink layer is arranged correspondingly to the through hole of the flexible display screen module. Figure 5 Example.

[0053] See also Fig.10 , Fig.10 1 is a flow chart of another embodiment of a method for preparing a flexible display screen assembly of the present application, and the method for preparing the flexible display screen assembly includes but is not limited to the following steps.

[0054] Step S100, providing an ultra-thin glass sheet.

[0055] The ultra-thin glass sheet is bendable glass with a thickness of 20-60um.

[0056] Please continue reading Fig.10 The preparation method further includes step S200, forming a light-shielding ink layer with a ring structure in a preset area of ​​the ultra-thin glass sheet.

[0057] Among them, the preset area is a through hole area corresponding to the flexible display screen module.

[0058] Specifically, the light-shielding ink layer can be formed by silk screen printing or pad printing. The process is as follows: incoming materials - thinning - inspection - trimming - lamination - CNC - edge processing - debonding - slicing - cleaning - strengthening - surface strengthening - laminating - silk screen printing or pad printing of light-shielding ink layer - baking - cleaning - laminating - 2PB full inspection - cleaning - pasting shipping film.

[0059] Among them, the process parameters of the screen printing light-shielding ink layer are as follows: Covering masking film: Use an automatic laminating machine to laminat the hollow masking film at the camera through-hole position. Screen printing black oil: Use an automatic screen printing machine, screen mesh 165T, viscosity 6000-8000mpa.s, pre-bake 150±10℃, time 3±1min, and require a hundred-grid grade ≥4B; or pad printing black oil: four-channel glass pad printing machine, equipment air pressure 6±1MPa oil cup running speed 250-300mm / s, anti-static rubber head hardness 30°±2° smooth surface, rubber head left and right speed 800±200mm / s, rubber head preheating 100°±20° time 3S±2, rubber head ink taking height 160±20mm, ink upper line viscosity 3500-4000mpa.s, baking 150±10℃, time 30±1min, and require a hundred-grid grade ≥4B.

[0060] Please continue reading Fig.10 Different from the above-mentioned embodiment, the preparation method in this embodiment further includes step S400, of attaching a protective film made of resin material to the side of the ultra-thin glass sheet away from the light-shielding ink layer.

[0061] See also Fig.11 , Fig.11 The protective film 250 and the ultra-thin glass sheet 220 facing away from the light-shielding ink layer 230 may be bonded by a second optical adhesive layer 260. The protective film 250 may be made of transparent polyimide (CPI for short). The protective film 250 is used to protect the ultra-thin glass sheet 220.

[0062] Please continue reading Fig.10 The preparation method further includes step S300, aligning and bonding the ultra-thin glass sheet and the flexible display module.

[0063] The light-shielding ink layer is arranged correspondingly to the through hole of the flexible display screen module. Figure 8 Example.

[0064] It should also be noted that step S400 may also be performed after step S300, which is not specifically limited here.

[0065] The preparation method in this embodiment, by arranging the light-shielding ink layer on the side of the bendable ultra-thin glass sheet corresponding to the flexible display screen module, can shield the camera lighting through hole of the flexible display screen module while avoiding deformation of other material layers, thereby reducing the lighting impact on the camera and improving the camera's shooting quality.

[0066] The above descriptions are only some embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A flexible display screen assembly, characterized in that: The flexible display screen assembly comprises: The flexible display screen module is provided with a through hole for camera lighting; A bendable ultra-thin glass sheet, covering the light-emitting surface of the flexible display screen module; Wherein, the ultra-thin glass sheet is provided with a light-shielding ink layer at a position corresponding to the through hole, and the light-shielding ink layer is a ring-shaped structure, which is used to shield the edge circumference of the through hole.

2. The flexible display screen assembly according to claim 1, characterized in that: The ultra-thin glass sheet and the flexible display screen module are bonded together via a first optical adhesive layer, and the first optical adhesive layer is hollowed out at a position corresponding to the through hole.

3. The flexible display screen assembly according to claim 2, characterized in that: The flexible display screen assembly further comprises a protective film made of resin material, and the protective film is attached to a side of the ultra-thin glass sheet away from the flexible display screen module via a second optical adhesive layer.

4. The flexible display screen assembly according to claim 3, characterized in that: The material of the protective film is transparent polyimide.

5. The flexible display screen assembly according to claim 1, characterized in that: The flexible display screen module comprises a flexible display screen substrate and a polarizer which are stacked, and the ultra-thin glass sheet is laminated to the polarizer.

6. The flexible display screen assembly according to claim 1, characterized in that: The thickness of the ultra-thin glass sheet is 20-60 um; the thickness of the light-shielding ink layer is 2-10 um.

7. A foldable electronic device, characterized in that: The electronic device comprises the flexible display screen assembly according to any one of claims 1 to 6.

8. A method for preparing a flexible display screen assembly, characterized in that: The preparation method comprises: Providing an ultra-thin glass sheet; forming a light-shielding ink layer in a ring-shaped structure in a preset area of ​​the ultra-thin glass sheet; The ultra-thin glass sheet is aligned and bonded to the flexible display screen module; wherein the light-shielding ink layer is arranged corresponding to the through hole of the flexible display screen module.

9. The preparation method according to claim 8, characterized in that: The preparation method further comprises: attaching a protective film made of resin material to a side of the ultra-thin glass sheet away from the light-shielding ink layer.

10. The preparation method according to claim 8, characterized in that: The step of forming a light-shielding ink layer with an annular structure in a preset area of ​​the ultra-thin glass sheet is specifically to form the light-shielding ink layer by silk screen printing or pad printing.

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