Reinforcement structure, method for making the same, display assembly and electronic device

Abstract

The present application provides a reinforcement structure, which is applied to an electronic device with a flexible display screen to support the flexible display screen, and the reinforcement structure is arranged between the flexible display screen and the optical detection module. The reinforcement structure includes: a steel plate, and a first window is arranged on the portion of the steel plate located above the optical detection module; a buffer layer, which is formed by a buffer material covering the steel plate and filling the first window. Among them, the buffer material filling the first window is a transparent material to support the detection area of ​​the flexible display screen located above the first window, and to allow the light signal returned by the target above the detection area to pass through the first window and reach the optical detection module. Since the window is arranged at the corresponding position of the reinforcement structure, it will not affect the use of the optical detection device under the flexible display screen, and since the window on the steel plate is filled with a transparent material, the traces of the edge of the window on the flexible display screen are also reduced, avoiding affecting the appearance of the flexible display screen.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of optical detection, and more specifically, to a reinforcement structure, a method for manufacturing the reinforcement structure, a display assembly, and an electronic device. Background Art

[0002] Optical under-screen fingerprint detection technology uses the fingerprint detection module under the display screen to collect the optical signal returned by the finger above the display screen. The optical signal carries the fingerprint information of the finger, thereby realizing under-screen fingerprint detection. For electronic devices using flexible display screens, since the material of the flexible display screen is relatively soft, a steel plate can usually be set to support the flexible display screen. In order not to affect the fingerprint detection module under the flexible display screen to collect the optical signal returned by the finger, it is necessary to open a window at the corresponding position of the steel plate, which makes the edge of the window open show obvious marks on the flexible display screen. In particular, when the user presses the fingerprint detection area of ​​the flexible display screen above the window, not only will the window opening marks on the flexible display screen be more obvious, but the fingerprint detection area of ​​the flexible display screen may also sink due to the pressure of the finger. Summary of the invention

[0003] The embodiments of the present application provide a reinforcement structure, a method for manufacturing the reinforcement structure, a display component and an electronic device, which can realize under-screen optical detection of a flexible display screen.

[0004] In a first aspect, a reinforcement structure is provided, which is applied to an electronic device having a flexible display screen to support the flexible display screen, wherein the reinforcement structure is arranged between the flexible display screen and an optical detection module in the electronic device. The reinforcement structure comprises:

[0005] A steel plate, wherein a portion of the steel plate located above the optical detection module is provided with a first window; and

[0006] A buffer layer is formed by a buffer material covering the steel plate and filling the first window, wherein the buffer material filling the first window is a transparent material to support the detection area of ​​the flexible display screen above the first window and allow the light signal returned by the target above the detection area to pass through the first window and reach the optical detection module.

[0007] In this embodiment, when the reinforcement structure supports the flexible display screen, since the window is provided at the corresponding position, it will not affect the use of the optical detection device under the flexible display screen. In addition, since the window on the steel plate is filled with transparent material, the traces of the window edge on the flexible display screen can be reduced, thereby avoiding affecting the appearance of the flexible display screen.

[0008] In a possible implementation, the buffer material is thermoplastic polyurethane (TPU) or silicone.

[0009] In a possible implementation, the sum of the thicknesses of the steel plate and the buffer layer is 0.2 mm, wherein the thickness of the steel plate is 0.15 mm, or the thickness of the steel plate is 0.1 mm.

[0010] In a possible implementation, the buffer material filling the first window and covering the area of ​​the steel plate other than the first window are both the transparent material, and the steel plate and the transparent material are integrally formed by an oil pressure process.

[0011] Since the first window and its surrounding area on the steel plate are covered with the same buffer material, and the buffer material covers the steel plate and fills the first window through an oil pressure process, the buffer layer and the steel plate are integrally formed. This not only reduces the traces of the window edge on the flexible display screen, but also strengthens the bonding force between the buffer layer and the steel plate, thereby avoiding the sinking caused by pressing the detection area above the first window in the flexible display screen.

[0012] In a possible implementation, at least one second window is further provided on the steel plate, and the transparent material also fills the at least one second window.

[0013] In a possible implementation, the at least one second window is located in four vertex areas of the steel plate.

[0014] In a possible implementation, the steel plate is a steel plate with a blackened surface.

[0015] In one possible implementation, the surface of the steel plate consists of a first area surrounding the first window and a second area surrounding the first area, wherein the portion of the steel plate located in the second area is in a grid shape, the transparent material also fills the grid openings in the second area, and the second area and at least part of the first area are also bonded with shading material.

[0016] In this way, the grid openings of the steel plate are filled with transparent material, which can further strengthen the bonding force between the buffer layer and the steel plate.

[0017] In a possible implementation manner, the first area is used to bond the optical detection module.

[0018] In a possible implementation, the light-shielding material is black Mylar.

[0019] In this way, at least one second window is provided on the steel plate and filled with transparent material at the same time, so that the bonding force between the buffer layer and the steel plate can be further strengthened.

[0020] In a possible implementation, the surface of the steel plate consists of a first area surrounding the first window and a second area surrounding the first area, wherein the buffer material covering the second area is a black material, and the black material and the steel plate are integrally formed by an oil pressure process.

[0021] In a possible implementation manner, a portion of the steel plate located in the first area is provided with a plurality of through holes, and the transparent material also fills the plurality of through holes.

[0022] Designing multiple through holes in the first area is conducive to forming a locking effect between the filled transparent material and the steel plate, thereby enhancing the bonding strength of the transparent material in the entire first window area and improving the reliability of the steel plate.

[0023] In a possible implementation, the cross-section of the first window is a square with a side length of 7 mm, and the first area is a square with an outer diameter of 10 mm.

[0024] In a possible implementation, the diameter of the through hole is 4 mm.

[0025] In a possible implementation, the optical detection module is bonded to the area of ​​the steel plate around the first window by a pressure sensitive adhesive (PSA).

[0026] In a possible implementation, a transparent support plate is further provided below the steel plate, and the optical detection module is bonded to the support plate by PSA.

[0027] In a possible implementation manner, the support plate is a glass plate or a sapphire plate.

[0028] In a possible implementation, a middle frame of the electronic device is disposed below the reinforcement structure, and the optical detection module is located in a through hole of the middle frame.

[0029] In a possible implementation, the middle frame of the electronic device is disposed below the reinforcement structure, and the optical detection module is located in a blind hole of the middle frame, with a gap being provided between the optical detection module and the middle frame.

[0030] In a possible implementation, the depth of the blind hole is 0.4 mm, and the interval is 0.2 mm.

[0031] In a possible implementation, the optical detection module is a fingerprint detection module, and the optical signal is a fingerprint optical signal returned by a finger above the flexible display screen.

[0032] In a second aspect, a method for manufacturing the reinforcement structure in the first aspect or any possible implementation of the first aspect is provided, comprising:

[0033] Get the steel plate;

[0034] Making a first window on the portion of the steel plate above the optical detection module;

[0035] A buffer layer is made on the steel plate using a buffer material, and the buffer material covers the steel plate and fills the first window, wherein the buffer material filling the first window is a transparent material to support the detection area of ​​the flexible display screen above the first window, and to allow the light signal returned by the target above the detection area to pass through the first window and reach the optical detection module.

[0036] In this embodiment, when the reinforcement structure supports the flexible display screen, since the window is provided at the corresponding position, it will not affect the use of the optical detection device under the flexible display screen. In addition, since the window on the steel plate is filled with transparent material, the traces of the window edge on the flexible display screen can be reduced, thereby avoiding affecting the appearance of the flexible display screen.

[0037] In a possible implementation, the buffer material is thermoplastic polyurethane TPU or silicone.

[0038] In a possible implementation, the sum of the thicknesses of the steel plate and the buffer layer is 0.2 mm, wherein the thickness of the steel plate is 0.15 mm, or the thickness of the steel plate is 0.1 mm.

[0039] In a possible implementation, the buffer material filling the first window and covering the area of ​​the steel plate except the first window are both the transparent material; wherein, the buffer layer is made on the steel plate using the buffer material, comprising: using an oil pressure process to cover the steel plate with the transparent material and fill the first window, so that the steel plate and the transparent material are formed as one piece.

[0040] Since the first window and its surrounding area on the steel plate are covered with the same buffer material, and the buffer material covers the steel plate and fills the first window through an oil pressure process, the buffer layer and the steel plate are integrally formed. This not only reduces the traces of the window edge on the flexible display screen, but also strengthens the bonding force between the buffer layer and the steel plate, thereby avoiding the sinking caused by pressing the detection area above the first window in the flexible display screen.

[0041] In a possible implementation, before making a buffer layer on the steel plate using the buffer material, the method further includes: making at least one second window on the steel plate; wherein the transparent material also fills the at least one second window.

[0042] In this way, at least one second window is provided on the steel plate and filled with transparent material at the same time, so that the bonding force between the buffer layer and the steel plate can be further strengthened.

[0043] In a possible implementation, the at least one second window is located in four vertex areas of the steel plate.

[0044] In a possible implementation, the steel plate is a steel plate whose surface is blackened, wherein making the first window includes: making the first window on the blackened steel plate.

[0045] In a possible implementation, the surface of the steel plate is composed of a first area surrounding the first window and a second area surrounding the first area. The portion of the steel plate located in the second area is in a grid shape, and the transparent material also fills the grid openings in the second area; wherein the method further comprises: bonding a light shielding material to the second area and at least a portion of the first area.

[0046] Since the grid of the steel plate may be filled with transparent material, the bonding force between the buffer layer and the steel plate can be further strengthened.

[0047] In a possible implementation manner, the first area is used to bond the optical detection module.

[0048] In a possible implementation, the light-shielding material is black Mylar.

[0049] In a possible implementation, the surface of the steel plate is composed of a first area surrounding the first window and a second area surrounding the first area. The step of making a buffer layer on the steel plate using a buffer material includes: pasting the black material on the second area through an oil pressure process. The first window is filled with the transparent material and the first area is covered.

[0050] In a possible implementation, before making a buffer layer on the steel plate using the buffer material, the method further includes: making a plurality of through holes on the portion of the steel plate located in the first area; wherein, filling the first window and covering the first area with the transparent material includes: filling the first window and the plurality of through holes and covering the first area with the transparent material.

[0051] Designing multiple through holes in the first area is conducive to forming a locking effect between the filled transparent material and the steel plate, thereby enhancing the bonding strength of the transparent material in the entire first window area and improving the reliability of the steel plate.

[0052] In a possible implementation, the cross-section of the first window is a square with a side length of 7 mm, and the first area is a square with an outer diameter of 10 mm.

[0053] In a possible implementation, the diameter of the through hole is 4 mm.

[0054] In a possible implementation, the optical detection module is bonded to the area of ​​the steel plate around the first window through PSA.

[0055] In a possible implementation, a transparent support plate is further provided below the steel plate, and the optical detection module is bonded to the support plate by PSA.

[0056] In a possible implementation manner, the support plate is a glass plate or a sapphire plate.

[0057] In a possible implementation, a middle frame of the electronic device is disposed below the reinforcement structure, and the optical detection module is located in a through hole of the middle frame.

[0058] In a possible implementation, the middle frame of the electronic device is disposed below the reinforcement structure, and the optical detection module is located in a blind hole of the middle frame, with a gap being provided between the optical detection module and the middle frame.

[0059] In a possible implementation, the depth of the blind hole is 0.4 mm, and the interval is 0.2 mm.

[0060] In a possible implementation, the optical detection module is a fingerprint detection module, and the optical signal is a fingerprint optical signal returned by a finger above the flexible display screen.

[0061] In a third aspect, a display component is provided, including:

[0062] Flexible displays; and

[0063] The reinforcement structure in the first aspect or any possible implementation manner of the first aspect, wherein the reinforcement structure is arranged below the flexible display screen to support the flexible display screen.

[0064] In a fourth aspect, an electronic device is provided, including:

[0065] Optical detection module;

[0066] Flexible displays; and

[0067] The reinforcement structure in the first aspect or any possible implementation of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 is a schematic diagram of the reinforcement structure.

[0069] Figure 2 It is a schematic diagram of the fingerprint detection module.

[0070] Figure 3 is a schematic diagram of a flexible display screen.

[0071] Figure 4 It is a schematic diagram of the reinforcement structure of an embodiment of the present application.

[0072] Figure 5 It is produced Figure 4 A schematic flow chart of a method for a reinforcement structure is shown.

[0073] Figure 6 yes Figure 5 A schematic diagram of a specific implementation of the method shown.

[0074] Figure 7 yes Figure 5 A schematic diagram of a specific implementation of the method shown.

[0075] Figure 8 yes Figure 5 A schematic diagram of a specific implementation of the method shown.

[0076] Fig. 9 It is a schematic diagram of the die cutting steps.

[0077] Fig.10 yes Figure 5 A schematic diagram of a specific implementation of the method shown.

[0078] Fig.11 yes Figure 5 A schematic diagram of a specific implementation of the method shown.

[0079] Fig.12 yes Fig.11 Schematic diagram of the dimensions of the reinforcement structure made by the method shown.

[0080] Fig.13 It is a schematic diagram of the reinforcement structure of an embodiment of the present application applied to an electronic device.

[0081] Fig.14 It is a schematic diagram of the reinforcement structure of an embodiment of the present application applied to an electronic device.

[0082] Fig.15It is a schematic diagram of the reinforcement structure of an embodiment of the present application applied to an electronic device. DETAILED DESCRIPTION

[0083] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0084] For mobile phones using flexible displays, since the material of the flexible display is relatively soft, a reinforcement structure is usually provided to support the entire flexible display and enhance the strength of the flexible display. Figure 1 As shown, there is a complete reinforcement structure 140 under the flexible display screen 120 for support. The reinforcement structure 140 is bonded under the flexible display screen 120, and the flexible display screen 120 can be, for example, an OLED display screen or an LED display screen. The reinforcement structure 140 includes a steel plate 142 and a TPU layer 141, wherein the TPU layer 141 and the steel plate 142 can be bonded by optically clear adhesive (OCA), PSA, transparent glue and other materials, and the thickness of the adhesive material is usually 0.02 mm. .

[0085] like Figure 1 As shown, the laminated structure of the flexible display screen 120 is composed of a cover film or ultra-thin glass (UTG) 121, a touch film 122, polarizers (POL) 123, an OLED light-emitting layer 124, etc., and the laminated layers can be bonded by, for example, OCA or PSA. It should be understood that Figure 1 It is just an illustration, and the reinforcement structure of the present application can be applied to any flexible display screen with a laminated structure.

[0086] When performing under-screen optical fingerprint detection, the fingerprint detection module located below the flexible display needs to collect the optical signal returned by the finger above the flexible display. Therefore, it is necessary to open a window above the fingerprint detection module on the reinforcement structure. Figure 2 The electronic device 10 shown includes a flexible display screen 120, a fingerprint detection module 130, and a reinforcement structure 140. The fingerprint detection module 130 is disposed in a local area below the flexible display screen 120. The reinforcement structure 140 is bonded to the lower surface of the flexible display screen 120 to support the flexible display screen 120, and the opening on the reinforcement structure 140 is located above the fingerprint detection module 130, so that the optical signal returned by the finger above the flexible display screen can reach the fingerprint detection module 130 through the opening.

[0087] The fingerprint detection module 130 includes an optical fingerprint sensor, which includes a sensing array 133 having a plurality of optical sensing units 131. The area where the sensing array 133 is located or its sensing area is the fingerprint detection area 121 of the fingerprint detection module 130. Figure 3 As shown, the fingerprint detection area 121 can be located in the display area of ​​the flexible display screen 120. Figure 3 The flexible display screen is also called a folding display screen, which can be made of flexible materials such as plastic or metal. Figure 3 (a) shows an inward-folding display screen 120, wherein the display area is located on the inner side of the display screen 120; Figure 3 (b) shows an outward-folding display screen, whose display area is located outside the display screen 120.

[0088] The area of ​​the fingerprint detection area 121 may be different from the area of ​​the sensing array 133 of the fingerprint detection module 130. For example, through the optical path design of lens imaging, the reflective folded optical path design, or other optical path designs such as light convergence or reflection, the area of ​​the fingerprint detection area 121 of the fingerprint detection module 130 may be larger than the area of ​​the sensing array 133 of the fingerprint detection module 130. Alternatively, if, for example, a light collimation method is used for optical path guidance, the fingerprint detection area 121 of the fingerprint detection module 130 may also be designed to be substantially consistent with the area of ​​the sensing array of the fingerprint detection module 130.

[0089] Therefore, when the user needs to unlock the electronic device 10 or perform other fingerprint verification, the user only needs to press the finger on the fingerprint detection area 121 located on the flexible display screen 120 to achieve fingerprint input.

[0090] The fingerprint detection module 130 includes a light detection part 134 and an optical component 132. The light detection part 134 includes a sensing array 133 and a reading circuit and other auxiliary circuits electrically connected to the sensing array 133. The sensing array 133 can be a photodetector array, which includes a plurality of photodetectors distributed in an array, and the photodetectors can be used as the above-mentioned optical sensing units. The optical component 132 can be arranged above the sensing array 133 of the light detection part 134, for example, it can include a filter layer, a light path guiding structure, and other optical elements. Among them, the filter layer can be used to filter out the ambient light that penetrates the finger, and the light path guiding structure can be used to guide the light returned from the finger surface to the sensing array 133.

[0091] The optical path guiding structure of the optical component 132 can be specifically a collimator layer made of a semiconductor silicon wafer, which has multiple collimator units or a micro-hole array. The collimator unit can be specifically a small hole, and the light returning from the finger is vertically incident and passes through the collimator unit to be received by the optical sensing unit below, while the light with too large an incident angle is attenuated after multiple reflections inside the collimator unit. Therefore, each optical sensing unit can basically only receive the light returning from the fingerprint pattern directly above it, so that the sensing array 133 can detect the fingerprint image of the finger.

[0092] Alternatively, the light path guiding structure can be an optical lens (Lens) layer, which has one or more lens units for converging the light returned from the finger to the sensing array 133 of the light detection part 134 thereunder, so that the sensing array 133 performs imaging based on the light returned from the finger to obtain a fingerprint image of the finger.

[0093] Alternatively, the light path guiding structure may adopt a micro-lens layer, which has a micro-lens array formed by a plurality of micro-lenses, which may be formed above the sensing array 133 of the light detection part 134 by a semiconductor growth process or other processes, and each micro-lens may correspond to one of the sensing units of the sensing array 133. Further, a light-blocking layer having micro-holes may be included between the micro-lens layer and the sensing unit, wherein the micro-holes are formed between the corresponding micro-lenses and the sensing unit, and the light-blocking layer may block the optical interference between the adjacent micro-lenses and the sensing unit, and allow the light corresponding to each sensing unit to pass through the corresponding micro-lens, converge into the corresponding micro-hole, and be transmitted to the sensing unit via the micro-hole to perform optical fingerprint imaging.

[0094] However, since the flexible display is relatively soft, after a window is opened at the corresponding position of the reinforcement structure, the edge of the window will show obvious marks on the flexible display. In particular, when the user presses the fingerprint detection area of ​​the flexible display above the window, not only will there be obvious window opening marks on the flexible display, the fingerprint detection area of ​​the flexible display may also sink due to the pressure of the finger.

[0095] To this end, the present application provides a solution, in which a transparent material is arranged in the window of the reinforcement structure, so that the light signal returned by the finger above the flexible display screen can pass through the transparent material in the window to reach the optical detection module, and will not affect the use of the optical detection device under the flexible display screen. Moreover, since the transparent material can support the detection area of ​​the flexible display screen above the window, the impact of the window on the appearance of the flexible display screen is reduced.

[0096] Figure 4 The reinforcement structure of the embodiment of the present application is shown. Figure 4As shown, the reinforcement structure 400 is disposed between the flexible display screen 120 and the optical detection module of the electronic device. The reinforcement structure 400 includes a steel plate 410 and a buffer layer 420 .

[0097] A first window 411 is provided on the portion of the steel plate 410 located above the optical detection module.

[0098] The steel plate 410 may also be referred to as a steel patch or a steel sheet, and its thickness may generally be 0.15 or 0.2 mm, but this is not limited here.

[0099] The buffer layer 420 is formed by a buffer material covering the steel plate 410 and filling the first window 411. The buffer material filling the first window 411 is a transparent material to support the detection area of ​​the flexible display screen 120 located above the first window 411, and to allow the light signal returned by the target above the detection area to pass through the first window 411 and reach the optical detection module.

[0100] The buffer material may be, for example, TPU or silica gel. In the following, TPU is used as an example for description.

[0101] Among them, the optical detection module can be Figure 2 and Figure 3 The fingerprint detection module 130 shown in the figure may also be other optical detection modules located below the reinforcement structure, such as an ambient light detection module, a camera module, or a vital sign detection module. The fingerprint detection module is used to receive the fingerprint optical signal returned by the finger above the flexible display screen and passing through the flexible display screen to perform fingerprint detection; the vital sign detection module is used to receive the vital sign optical signal returned by the finger and passing through the flexible display screen to perform vital sign detection; the ambient light sensor chip is used to receive the ambient light signal passing through the flexible display screen to perform ambient light detection.

[0102] The following description is made by taking the fingerprint detection module 130 as an example. At this time, the optical signal passing through the first window 411 is a fingerprint optical signal returned by the finger above the flexible display screen 120 .

[0103] The sum of the thickness of the steel plate 410 and the buffer layer 420 may be, for example, equal to 0.2 mm. The thickness of the steel plate is 0.15 mm, or the thickness of the steel plate is 0.1 mm.

[0104] That is, the thickness of the steel plate 410 and the buffer layer 420 located outside the first window 411 may be 0.15 mm and 0.05 mm respectively; or, the thickness of the steel plate 410 and the buffer layer 420 located outside the first window 411 may be 0.1 mm and 0.1 mm respectively.

[0105] In this embodiment, a reinforcement structure is provided under the flexible display screen, which can support the entire flexible display screen, and a window is provided at the corresponding position of the reinforcement structure, so that the use of the optical detection device under the flexible display screen will not be affected. In addition, since the window is filled with a transparent material, the light signal returned by the target above the flexible display screen can reach the optical detection module through the transparent material in the window, and the traces of the window edge on the flexible display screen can be reduced, thereby avoiding affecting the appearance of the flexible display screen.

[0106] Figure 5 The method of manufacturing the steel plate 400 is shown as follows: Figure 5 As shown, the method includes some or all of the following steps.

[0107] In step 510 , a steel plate 410 is obtained.

[0108] In step 520, a first window 411 is made in the portion of the steel plate 410 located above the optical detection module.

[0109] In step 530 , a buffer layer 420 is fabricated on the steel plate 410 using a buffer material.

[0110] The following, combined Figures 6 to 9 , several possible implementations of the reinforcement structure provided in this application are described in detail.

[0111] Example 1

[0112] In the reinforcement structure 400 , the buffer material filling the first window 141 and covering the area of ​​the steel plate 410 except the first window 411 are both transparent materials, and the steel plate 410 and the transparent material are integrally formed by a hydraulic process.

[0113] The reinforcement structure 400 can be realized by a hydraulic process. By the hydraulic process, the transparent material covers the steel plate 410 and fills the first window 411, so that the steel plate 410 and the transparent material are integrally formed.

[0114] Since the first window and its surrounding area on the steel plate are covered with the same buffer material, and the buffer material covers the steel plate and fills the first window through an oil pressure process, the buffer layer and the steel plate are integrally formed. This not only reduces the traces of the window edge on the flexible display screen, but also strengthens the bonding force between the buffer layer and the steel plate, thereby avoiding the sinking caused by pressing the detection area above the first window in the flexible display screen.

[0115] Usually, if Figure 1The buffer layer shown, namely the TPU layer 141, is bonded to the steel plate 142 via OCA or PSA. The TPU layer 141 is bonded to the flexible display screen 120. The secondary bonding process will incur high costs, and since there are windows on the steel plate 142, if windows are also opened at the corresponding positions on the TPU layer 141 and the bonding material, the secondary bonding will cause the bonding errors to be superimposed, resulting in poor bonding consistency between the TPU layer 141 and the steel plate 142, affecting the bonding force between the buffer layer 420 and the steel plate 410.

[0116] If, after the transparent material is filled in the first window 411, the TPU layer 141 and the steel plate 142 are pasted together, although the mark of the window on the flexible display screen can be reduced, when the user presses the detection area above the first window in the flexible display screen many times, the flexible display screen may sink due to insufficient bonding force between the buffer layer 414 and the steel plate 412.

[0117] In Example 1, the buffer material filling the first window 141 and covering the area outside the first window 411 of the steel plate 410 is a transparent material, and the transparent material is made on the surface of the steel plate 410 by a hydraulic process and filled in the first window 411. Therefore, the buffer layer 420 formed of the transparent material is integrally formed with the steel plate 410, and the bonding force between the buffer layer 420 and the steel plate 410 is stronger, and the flexible display screen is not easy to be dented in the detection area due to frequent pressing by the user.

[0118] In one implementation, the steel plate 410 may be a steel plate whose surface has been blackened, for example, by coating the surface of the steel plate with black paint using a method such as physical vapor deposition (PVD).

[0119] At this time, if Figure 6 As shown, a first window 411 may be made on a blackened steel plate 410 , and a buffer layer 420 may be made to cover the steel plate 410 and fill the first window 411 .

[0120] Figure 6 (a) shows a blackened steel plate 410 .

[0121] exist Figure 6 In (b), a first window 411 and a reinforcing rib 416 are made on a blackened steel plate 410. The reinforcing rib 416 is used to assist in positioning the material during the process.

[0122] exist Figure 6In (c), the transparent material covers the surface of the steel plate 410 and fills the first window 411 through an oil pressure process to form a buffer layer 420.

[0123] The oil pressure process enables the steel plate 410 and the buffer layer 420 to be integrally formed, which has a stronger bonding force.

[0124] exist Figure 6 In (d), excess transparent material is removed by die cutting, and the reinforcing rib 416 is removed, and finally the following is obtained: Figure 6 The reinforcement structure 400 shown in (e) in FIG.

[0125] Furthermore, in this embodiment, at least one second window 414 may be provided on the steel plate 410. The transparent material further fills the at least one second window 414. Figure 7 As shown, before the buffer layer 420 is manufactured by the oil pressure process, at least one second window 414 needs to be manufactured on the steel plate 410 .

[0126] Figure 7 (a) shows a blackened steel plate 410 .

[0127] exist Figure 7 In (b), a first window 411 , at least one second window 414 , and a reinforcing rib 416 are made on a steel plate 410 .

[0128] in, Figure 7 Taking four second windows 414 as an example, the four second windows 414 are respectively located at four vertex areas of the steel plate 410. However, the present invention is not limited thereto, and the number, shape and position of the second windows 414 can be changed according to actual conditions.

[0129] exist Figure 7 In (c), the transparent material covers the surface of the steel plate 410 and fills the first opening 411 and at least one second opening 414 through an oil pressure process to form a buffer layer 420.

[0130] The oil pressure process enables the steel plate 410 and the buffer layer 420 to be integrally formed, which has a stronger bonding force.

[0131] exist Figure 7 In (d), excess transparent material is removed by die cutting, and the reinforcing rib 416 is removed, and finally the following is obtained: Figure 7 The reinforcement structure 400 shown in (e) in FIG.

[0132] Providing at least one second window 414 on the steel plate 410 and filling it with transparent material can further strengthen the bonding force between the buffer layer 420 and the steel plate 410, so that the flexible display screen is not easily dented in the detection area due to frequent pressing by the user.

[0133] In another implementation, the surface of the steel plate 410 may be composed of a first area 412 surrounding the first window 411 and a second area 413 surrounding the first area 412. In other words, the area on the surface of the steel plate 410 other than the first window 411 may be divided into the first area 412 and the second area 413.

[0134] The portion of the steel plate 410 located in the second area 413 is in a grid shape.

[0135] The first region 412 may be used to bond the optical detection module, that is, the optical detection module may be bonded to the first region 412 by bonding material.

[0136] At this time, since the steel plate 410 in the second area is in a grid shape, and the transparent material is used to fill the first window 411 and the grid openings in the second area at the same time through the oil pressure process and covers the surface of the steel plate 410, the area of ​​the steel plate 410 other than the first window 411 cannot be shading. Therefore, it is necessary to bond shading material, such as black Mylar, to the second area 413 to block the ambient light from affecting the effective light signal collected by the optical detection module under the steel plate 410.

[0137] Specific as Figure 8 As shown, the reinforcement structure 400 in this embodiment can be realized by the following steps.

[0138] Figure 8 The steel plate 410 is shown in (a).

[0139] The steel plate 410 is provided with a first window 411, and the area other than the first window 411 is divided into a first area 412 and a second area 413. The portion of the steel plate 410 located in the second area 413 is in a grid shape, that is, the steel plate in the second area 413 is a grid-shaped steel plate.

[0140] exist Figure 8 In (b), a transparent material, such as transparent TPU or transparent silicone, is covered on the surface of the steel plate 410 through an oil pressure process and filled into the grid openings of the first window 411 and the second area 413 to form a buffer layer 420.

[0141] The hydraulic process enables the steel plate 410 and the buffer layer 420 to be integrally formed, and have a stronger bonding force. In addition, during the hydraulic process, since the mesh of the steel plate may be filled with a transparent material, the bonding force between the buffer layer and the steel plate is further strengthened.

[0142] After removing excess transparent material through die cutting, Figure 8In (c), a light shielding material, such as black Mylar, is bonded to the second region 413 and at least a portion of the first region 412 of the steel plate 410 .

[0143] Finally, we get Figure 8 The reinforcement structure 400 shown in (d) in FIG.

[0144] Here, the light shielding material can be attached to the surface of any side of the steel plate 410 , but should cover the entire second area 413 and needs to cover at least a portion of the first area 412 . Figure 8 The light shielding material shown in (d) covers the entire second region 413 and extends inward to a portion of the first region 412 .

[0145] During the oil pressure process, the transparent material may be arranged to extend beyond the edge of the steel plate 410, for example, by 0.1 mm. Fig. 9 As shown, the above-mentioned die-cutting step is facilitated.

[0146] In this way, through Figures 6 to 8 In the reinforcement structure 400 manufactured by the method shown, only the first window 411 can transmit the light signal for the optical detection module to detect the target, while the portion of the steel plate 410 located in other areas can absorb ambient light, thereby avoiding affecting the effective light signal in the first window 411.

[0147] Example 2

[0148] In the reinforcement structure 400 , the surface of the steel plate 410 except the first window 411 may be covered with black material so that the steel plate 410 and the black material are integrally formed; and then, the first window 411 is filled with transparent material.

[0149] For example, the surface of the steel plate 410 may be composed of a first area 412 surrounding the first window 411 and a second area 413 surrounding the first area 412. That is, the area of ​​the surface of the steel plate 410 other than the first window 411 may be divided into the first area 412 and the second area 413.

[0150] The buffer material covering the second area 413 is a black material, and the black material and the steel plate 410 are integrally formed by a hydraulic process.

[0151] As a part of the buffer layer 420 , the black material covers the portion of the surface of the steel plate 410 located in the second area 413 through an oil pressure process. Compared with the method of directly gluing the steel plate 410 and the buffer layer 420 , the bonding force between the steel plate 410 and the buffer layer 420 is stronger.

[0152] Specific as Fig.10As shown, the reinforcement structure 400 in this embodiment can be realized by the following steps.

[0153] Fig.10 The steel plate 410 is shown in (a).

[0154] exist Fig.10 In (b), a first window 411 and a reinforcing rib 416 are made on a steel plate 410 .

[0155] exist Fig.10 In (c), the second area 413 of the steel plate 410 is covered with a black material by an oil pressure process.

[0156] The oil pressure process enables the steel plate 410 and the black material to be integrally formed, which has a stronger bonding force.

[0157] exist Fig.10 In (d), a transparent material is used to fill the first window 411 and cover the first area 412 .

[0158] After removing the excess black material and the reinforcing rib 416 by die cutting, the following is obtained: Fig.10 The reinforcement structure 400 shown in (e).

[0159] and Fig. 9 Similarly, in this embodiment, during the oil pressure process, the black material can be arranged to extend beyond the edge of the steel plate 410 , for example, 0.1 mm beyond the edge of the steel plate 410 , to facilitate the above-mentioned die-cutting step.

[0160] Furthermore, the portion of the steel plate 410 located in the first region 412 may also be provided with a plurality of through holes 415, and the transparent material may also fill the plurality of through holes 415, such as Fig.11 shown.

[0161] Fig.11 The steel plate 410 is shown in (a).

[0162] exist Fig.11 In (b), a first window 411, a plurality of through holes 415, and a reinforcing rib 416 are made on a steel plate 410.

[0163] exist Fig.11 In (c), the second area 413 of the steel plate 410 is covered with a black material by an oil pressure process.

[0164] The oil pressure process enables the steel plate 410 and the black material to be integrally formed, which has a stronger bonding force.

[0165] exist Fig.11 In (d), a transparent material is used to fill the first opening 411 and the plurality of through holes 415 and cover the first region.

[0166] Then, the excess black material is removed by die cutting, and the reinforcing rib 416 is removed, and finally the following is obtained: Fig.11 The reinforcement structure 400 shown in (e) in FIG.

[0167] Designing a plurality of through holes 415 in the first area 412 is conducive to forming a locking effect between the filled transparent material and the steel plate 410 , thereby enhancing the bonding strength of the transparent material in the entire first window opening 411 area and improving the reliability of the steel plate 410 .

[0168] In the embodiment of the present application, the shapes and sizes of the first window 411 , the first area 412 , the second area 413 , the second window 414 , and the through hole 415 are not limited.

[0169] For example Fig.12 As shown, the cross section of the first window 411 may be a square with a side length of 7 mm.

[0170] For another example, the first area 412 is square and has an outer diameter of 10 mm, that is, the first area 412 is expanded by 1.5 mm relative to each side of the first window 411; or, the first area 412 can be expanded by 0.65 mm relative to each side of the first window 411.

[0171] For another example, the diameter of the through hole 415 is 4 mm.

[0172] The reinforcement structure 400 of the above-mentioned embodiment 1 and embodiment 2 can be bonded to the flexible display screen 120 and the optical detection module in the following ways.

[0173] Among them, Figures 13 to 15 , H is the thickness of the fingerprint detection module 130, for example, H = 0.407 mm. The middle frame 800 of the electronic device is disposed below the reinforcement structure 400, and the fingerprint detection module 130 is accommodated in the through hole or blind hole of the middle frame 800. P is the interval between the fingerprint detection module 130 and the reinforcement structure 400, for example, P = 0.174.

[0174] Method 1

[0175] The middle frame 800 of the electronic device is provided with a through hole, which is used to accommodate the optical detection module.

[0176] like Fig.13 As shown, the optical detection module 130 is bonded to the first surface of the steel plate 410 in the area around the window, such as the first area 412, through the PSA 151. The thickness of the PSA 151 may be, for example, 0.1 mm.

[0177] The fingerprint detection module 130 includes a PET layer 152 . The thickness of the PET layer 152 may be, for example, 0.2 mm. The PSA 151 is bonded between the PET layer 152 and the reinforcement structure 400 .

[0178] Method 2

[0179] The middle frame 800 of the electronic device is provided with a through hole, which is used to accommodate the optical detection module.

[0180] like Fig.14 As shown, a transparent support plate 430 is disposed below the steel plate 400 , and the optical detection module 130 is bonded to the support plate 430 by PSA.

[0181] The support plate 430 may be, for example, a glass plate or a sapphire plate, and the thickness of the glass plate or the sapphire plate may be, for example, 0.145 mm.

[0182] The fingerprint detection module 130 includes a PET layer 152 , wherein the PSA 151 is bonded between the PET layer 152 and the support plate 430 .

[0183] Since an optical detection module, such as a fingerprint detection module 130, is disposed below the window, when the fingerprint detection module 130 is used to detect the user's finger, the user's finger will press the detection area corresponding to the position of the first window 411 in the flexible display screen 120. Long-term pressing may cause the detection area to sink and form water ripples, affecting the user experience. The support plate 430 can further enhance the strength of the window area and reduce or eliminate the water ripple phenomenon.

[0184] Method 3

[0185] The middle frame 800 of the electronic device is provided with a blind hole, which is used to accommodate the optical detection module.

[0186] like Fig.15 As shown, a spacer is provided between the optical detection module 130 and the middle frame 800 , wherein 801 is foam for buffering between the middle frame 800 and the reinforcement structure 400 .

[0187] The depth of the blind hole may be, for example, 0.4 mm. In this case, the interval between the optical detection module 130 and the middle frame 800 may be 0.2 mm.

[0188] The above three whole-machine application methods can be applied to any reinforcement structure 400 described in Embodiment 1 and Embodiment 2.

[0189] Preferably, the light-transmitting areas of the flexible display screen 120, the reinforcement structure 400, and the silicone, TPU, glass, sapphire and other materials used in the optical detection module in the embodiment of the present application should have a transmittance greater than 90%, and the surface finish requirement is Ra0.03-0.05, so as to ensure that the optical detection module can perform target detection more accurately.

[0190] The present application also provides a display assembly, including: a flexible display screen; and the reinforcement structure described in any one of the above embodiments, wherein the reinforcement structure is arranged below the flexible display screen to support the flexible display screen.

[0191] The present application also provides an electronic device, including: an optical detection module; a flexible display screen; and the reinforcement structure described in any of the above embodiments.

[0192] The electronic device may be a portable or mobile computing device such as a terminal device, a mobile phone, a tablet computer, a laptop computer, a desktop computer, a gaming device, an in-vehicle electronic device or a wearable smart device, as well as other electronic devices such as an electronic database, a car, and an automated teller machine (ATM). The wearable smart device includes a device with full functions and large size that can realize full or partial functions without relying on a smart phone, such as a smart watch or smart glasses, and a device that only focuses on a certain type of application function and needs to be used in conjunction with other devices such as a smart phone, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0193] It should be noted that, under the premise of no conflict, the various embodiments described in this application and / or the technical features in each embodiment can be arbitrarily combined with each other, and the technical solution obtained after the combination should also fall within the protection scope of this application.

[0194] The systems, devices and methods disclosed in the embodiments of the present application may be implemented in other ways. For example, some features of the method embodiments described above may be ignored or not performed. The device embodiments described above are merely schematic, and the division of units is merely a logical function division. There may be other division methods in actual implementation, and multiple units or components may be combined or integrated into another system. In addition, the coupling between the units or the coupling between the components may be direct coupling or indirect coupling, and the coupling may include electrical, mechanical or other forms of connection.

[0195] It should be understood that the specific examples in the embodiments of the present application are only to help those skilled in the art to better understand the embodiments of the present application, rather than to limit the scope of the embodiments of the present application. Those skilled in the art can make various improvements and modifications based on the above embodiments, and these improvements or modifications all fall within the scope of protection of the present application.

[0196] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A reinforcement structure, characterized in that: Applied to an electronic device with a flexible display screen to support the flexible display screen, the reinforcement structure is arranged between the flexible display screen and the optical detection module in the electronic device, wherein the reinforcement structure comprises: A steel plate, wherein a portion of the steel plate located above the optical detection module is provided with a first window; and a buffer layer, formed of a buffer material covering the steel plate and filling the first window, wherein the buffer material filling the first window is a transparent material to support the detection area of ​​the flexible display screen located above the first window, and to allow the light signal returned by the target above the detection area to pass through the first window and reach the optical detection module; Among them, the buffer material filling the first window and covering the area of ​​the steel plate except the first window are both the transparent material, the steel plate and the transparent material are integrally formed by a hydraulic process, and the surface of the steel plate consists of a first area surrounding the first window and a second area surrounding the first area, wherein the portion of the steel plate located in the second area is grid-shaped, the transparent material also fills the grid openings in the second area, and the second area and at least part of the first area are also bonded with shading material.

2. The reinforcement structure according to claim 1, characterized in that: The buffer material is thermoplastic polyurethane TPU or silica gel.

3. The reinforcement structure according to claim 1 or 2, characterized in that: At least one second window is also provided on the steel plate, and the transparent material also fills the at least one second window.

4. The reinforcement structure according to claim 3, characterized in that: The at least one second window is located at four vertex areas of the steel plate.

5. The reinforcement structure according to claim 1 or 2, characterized in that: The steel plate is a steel plate with a blackened surface.

6. The reinforcement structure according to claim 1 or 2, characterized in that: The first area is used for bonding the optical detection module.

7. The reinforcement structure according to claim 1 or 2, characterized in that: The shading material is black Mylar.

8. The reinforcement structure according to claim 1 or 2, characterized in that: The optical detection module is bonded to the area of ​​the steel plate around the first opening by means of a pressure-sensitive adhesive (PSA).

9. The reinforcement structure according to claim 1 or 2, characterized in that: A transparent support plate is also provided below the steel plate, and the optical detection module is bonded to the support plate via PSA.

10. The reinforcement structure according to claim 9, characterized in that: The support plate is a glass plate or a sapphire plate.

11. The reinforcement structure according to claim 1 or 2, characterized in that: The middle frame of the electronic device is arranged below the reinforcement structure, and the optical detection module is located in the through hole of the middle frame.

12. The reinforcement structure according to claim 1 or 2, characterized in that: The middle frame of the electronic device is arranged below the reinforcement structure, and the optical detection module is located in the blind hole of the middle frame, and a gap is arranged between the optical detection module and the middle frame.

13. The reinforcement structure according to claim 1 or 2, characterized in that: The optical detection module is a fingerprint detection module, and the optical signal is a fingerprint optical signal returned by a finger above the flexible display screen.

14. A method for manufacturing a reinforcement structure according to any one of claims 1 to 13, characterized in that: The method comprises: Get the steel plate; Making a first window on the portion of the steel plate above the optical detection module; A buffer layer is made on the steel plate using a buffer material, and the buffer material covers the steel plate and fills the first window, wherein the buffer material filling the first window is a transparent material to support the detection area of ​​the flexible display screen above the first window, and to allow the light signal returned by the target above the detection area to pass through the first window and reach the optical detection module.

15. The method according to claim 14, characterized in that The buffer material is thermoplastic polyurethane TPU or silica gel.

16. The method according to claim 14 or 15, characterized in that The buffer material filling the first window and covering the area of ​​the steel plate except the first window are both the transparent material. Wherein, the method of making a buffer layer on the steel plate using a buffer material comprises: Through an oil pressure process, the transparent material covers the steel plate and fills the first window, so that the steel plate and the transparent material are formed in one piece.

17. The method according to claim 16, characterized in that Before making the buffer layer on the steel plate using the buffer material, the method further includes: Making at least one second window on the steel plate; Wherein, the transparent material also fills the at least one second opening window.

18. The method according to claim 17, characterized in that The at least one second window is located at four vertex areas of the steel plate.

19. The method according to claim 16, characterized in that The steel plate is a steel plate with a blackened surface.

20. The method according to claim 16, characterized in that The surface of the steel plate is composed of a first area surrounding the first window and a second area surrounding the first area, wherein the portion of the steel plate located in the second area is in a grid shape, and the transparent material also fills the grid openings in the second area. Wherein, the method further comprises: A light shielding material is bonded to the second region and at least a portion of the first region.

21. The method according to claim 20, characterized in that The first area is used for bonding the optical detection module.

22. The method according to claim 20, characterized in that The shading material is black Mylar.

23. The method according to claim 14 or 15, characterized in that The optical detection module is bonded to the area of ​​the steel plate around the first opening by means of a pressure-sensitive adhesive (PSA).

24. The method according to claim 14 or 15, characterized in that A transparent support plate is also provided below the steel plate, and the optical detection module is bonded to the support plate via PSA.

25. The method according to claim 24, characterized in that The support plate is a glass plate or a sapphire plate.

26. The method according to claim 14 or 15, characterized in that The middle frame of the electronic device is arranged below the reinforcement structure, and the optical detection module is located in the through hole of the middle frame.

27. The method according to claim 14 or 15, characterized in that The middle frame of the electronic device is arranged below the reinforcement structure, and the optical detection module is located in the blind hole of the middle frame, and a gap is arranged between the optical detection module and the middle frame.

28. The method according to claim 14 or 15, characterized in that The optical detection module is a fingerprint detection module, and the optical signal is a fingerprint optical signal returned by a finger above the flexible display screen.

29. A display component, characterized in that: include: Flexible display screen; as well as According to any one of claims 1 to 13, the reinforcement structure is arranged below the flexible display screen to support the flexible display screen.

30. An electronic device, characterized in that: include: Optical detection module; Flexible display screen; as well as, A reinforcement structure according to any one of claims 1 to 13.

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