CN215867893U

CN215867893U - Reinforcement structure, display module and electronic equipment

Info

Publication number: CN215867893U
Application number: CN202122131197.0U
Authority: CN
Inventors: 刘相英
Original assignee: Shenzhen Goodix Technology Co Ltd
Current assignee: Shenzhen Goodix Technology Co Ltd
Priority date: 2021-09-03
Filing date: 2021-09-03
Publication date: 2022-02-18
Anticipated expiration: 2031-09-03

Abstract

The application provides a reinforcement structure is applied to the electronic equipment who has flexible display screen to support flexible display screen, this reinforcement structure sets up between flexible display screen and optical detection module. This reinforcement structure includes: the part of the steel plate, which is positioned 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. The buffer material filled in the first window is made of transparent material to support the detection area of the flexible display screen above the first window, and the optical signal returned by the target above the detection area is enabled to pass through the first window and reach the optical detection module. Because the relevant position of reinforcement structure is provided with the windowing, can not lead to the fact the influence to the use of optical detection device under the flexible display screen to owing to adopt transparent material to fill the windowing on the steel sheet, still alleviateed the vestige that the edge of windowing appears on the flexible display screen, avoid causing the influence to the outward appearance of flexible display screen.

Description

Reinforcement structure, display module and electronic equipment

Technical Field

The embodiments of the present application relate to the field of optical detection, and more particularly, to a reinforcing structure, a display assembly, and an electronic device.

Background

Fingerprint detection technology under the optical screen utilizes the fingerprint detection module of display screen below to gather the light signal that the finger above the display screen returned, carries the fingerprint information of finger in the light signal to realize fingerprint detection under the screen. To the electronic equipment who adopts flexible display screen, because flexible display screen's material is softer, can set up the steel sheet and support flexible display screen usually, in order not to influence the fingerprint detection module of flexible display screen below and gather the light signal that the finger returned, need be at the relevant position windowing of steel sheet, this just makes the edge of windowing present obvious vestige on flexible display screen, especially when the user presses the fingerprint detection region that flexible display screen is located this windowing top, the vestige of windowing that not only can make flexible display screen's last presentation is more obvious, flexible display screen's fingerprint detection region still can sink because of pressing of finger.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a reinforcement structure, display module and electronic equipment, can realize optical detection under the screen of flexible display screen.

In a first aspect, a reinforcing structure is provided and applied to an electronic device with a flexible display screen to support the flexible display screen, and the reinforcing structure is arranged between the flexible display screen and an optical detection module in the electronic device. Wherein the reinforcing structure comprises:

the part of the steel plate, which is positioned above the optical detection module, is provided with a first window; and the number of the first and second groups,

and the buffer layer is formed by a buffer material which covers the steel plate and is filled with the first window, wherein the buffer material filled with the first window is a transparent material so as to support the detection area of the flexible display screen above the first window, and the optical signal returned by the target above the detection area penetrates through the first window and reaches the optical detection module.

In this embodiment, when the reinforcement structure is supporting the flexible display screen, because the relevant position is provided with the windowing, consequently can not cause the influence to the use of optical detection device under the flexible display screen to owing to adopted transparent material to fill the windowing on the steel sheet, can also alleviate the vestige that the edge of windowing appears on the flexible display screen, avoid causing the influence to the outward appearance of flexible display screen.

In one possible implementation, the buffer material is Thermoplastic Polyurethane (TPU) or silicone rubber.

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.

In one possible implementation manner, the buffer material filling the first window and covering the area of the steel plate except the first window is the transparent material, and the steel plate and the transparent material are integrally formed through an oil pressure process.

Because the same buffer material covers the first windowing and the surrounding area on the steel plate, and the buffer material covers the steel plate and fills the first windowing through the oil pressure process, the buffer layer and the steel plate are integrally formed, so that the trace of the windowing edge on the flexible display screen can be reduced, the binding force between the buffer layer and the steel plate is enhanced, and the sinking caused when the detection area above the first windowing in the flexible display screen is pressed is avoided.

In a possible implementation manner, at least one second window is further disposed on the steel plate, and the transparent material further fills the at least one second window.

In one possible implementation, the at least one second fenestration is located at four top corner regions of the steel sheet.

In one possible implementation manner, the steel plate is a steel plate with a blackened surface.

In a possible implementation manner, 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 a portion of the steel plate located in the second area is in a grid shape, the transparent material further fills the grid openings of the second area, and the second area and at least a portion of the first area are further bonded with a light shielding material.

Therefore, transparent materials are filled in the grid openings of the steel plate, and the binding force between the buffer layer and the steel plate can be further enhanced.

In a possible implementation manner, the first area is used for bonding the optical detection module.

In one possible implementation, the light-shielding material is black mylar.

Therefore, the at least one second window is arranged on the steel plate and is filled with the transparent material, and the bonding force between the buffer layer and the steel plate can be further enhanced.

In one possible implementation, the surface of the steel plate is composed of a first region surrounding the first window and a second region surrounding the first region, wherein the buffer material covering the second region is a black material, and the black material and the steel plate are integrally formed by an oil pressure process.

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 further fills the plurality of through holes.

Design a plurality of through-holes in first region, be favorable to forming the effect of hasp between the transparent material of packing and the steel sheet, strengthen the bonding strength of the transparent material in the whole first windowing region, promoted the reliability of steel sheet.

In one possible implementation, the cross section of the first fenestration is a square with a side of 7 mm, the first region is a square and the outer diameter is 10 mm.

In one possible implementation, the diameter of the through hole is 4 mm.

In one possible implementation, the optical detection module is adhered to the steel plate in an area around the first window by a Pressure Sensitive Adhesive (PSA).

In a possible implementation manner, a transparent support plate is further arranged below the steel plate, and the optical detection module is bonded to the support plate through PSA.

In one possible implementation, the support plate is a glass plate or a sapphire plate.

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

In a possible implementation manner, the middle frame of the electronic device is disposed below the reinforcing structure, the optical detection module is located in the blind hole of the middle frame, and a space is disposed between the optical detection module and the middle frame.

In one possible implementation, the blind holes have a depth of 0.4 mm and the spacing is 0.2 mm.

In a possible implementation manner, 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.

In a second aspect, there is provided a method of manufacturing the reinforcing structure of the first aspect or any possible implementation manner of the first aspect, including:

obtaining a steel plate;

manufacturing a first window on the part, positioned above the optical detection module, of the steel plate;

and manufacturing a buffer layer on the steel plate by using a buffer material, wherein the buffer material covers the steel plate and fills the first window, the buffer material filled in the first window is a transparent material so as to support a detection area of the flexible display screen above the first window, and an optical signal returned by a target above the detection area penetrates through the first window and reaches the optical detection module.

In one possible implementation, the buffer material is thermoplastic polyurethane TPU or silicone rubber.

In one possible implementation manner, 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, utilize buffer material to make the buffer layer on the steel sheet, include: and covering the steel plate with the transparent material and filling the first windowing through an oil pressure process so as to integrally form the steel plate and the transparent material.

In one possible implementation, before the fabricating a buffer layer on the steel plate by using a buffer material, the method further includes: manufacturing at least one second window on the steel plate; wherein the transparent material also fills the at least one second fenestration.

In one possible implementation manner, the steel plate is a steel plate with a blackened surface, wherein the making of the first window includes: and manufacturing the first windowing on the steel plate subjected to blackening treatment.

In one possible implementation, the surface of the steel plate is composed of a first region surrounding the first window, and a second region surrounding the first region. The part of the steel plate, which is positioned in the second area, is in a grid shape, and the transparent material also fills the grid openings of the second area; wherein the method further comprises: and bonding a light shielding material on the second area and at least part of the first area.

The transparent material may be filled in the meshes of the steel plate, so that the bonding force between the buffer layer and the steel plate can be further enhanced.

In one possible implementation, the light-shielding material is black mylar.

In one possible implementation, the surface of the steel plate is composed of a first region surrounding the first window, and a second region surrounding the first region. Wherein, utilize buffer material to make the buffer layer on the steel sheet, include: and sticking the black material on the second area through an oil pressure process. Filling the first window and covering the first area with the transparent material.

In one possible implementation, before the fabricating a buffer layer on the steel plate by using a buffer material, the method further includes: manufacturing a plurality of through holes on the steel plate at the part of the first area; wherein said filling said first fenestration and covering said first area with said transparent material comprises: filling the first window and the plurality of through holes and covering the first region with the transparent material.

In one possible implementation, the diameter of the through hole is 4 mm.

In one possible implementation manner, the optical detection module is bonded to the steel plate in an area around the first window through a PSA.

In a third aspect, there is provided a display assembly comprising:

a flexible display screen; and the number of the first and second groups,

the reinforcing structure in the first aspect or any possible implementation manner of the first aspect is disposed below the flexible display screen to support the flexible display screen.

In a fourth aspect, an electronic device is provided, comprising:

an optical detection module;

a flexible display screen; and the number of the first and second groups,

the reinforcing structure of the first aspect or any possible implementation manner of the first aspect.

Drawings

Fig. 1 is a schematic view of a reinforcing structure.

FIG. 2 is a schematic diagram of a fingerprint detection module.

Fig. 3 is a schematic view of a flexible display screen.

Fig. 4 is a schematic view of a reinforcing structure according to an embodiment of the present application.

FIG. 5 is a schematic flow chart of one method of making the reinforcement structure shown in FIG. 4.

Fig. 6 is a schematic diagram of a specific implementation of the method shown in fig. 5.

Fig. 7 is a schematic diagram of a specific implementation of the method shown in fig. 5.

FIG. 8 is a schematic diagram of one particular implementation of the method shown in FIG. 5.

Fig. 9 is a schematic view of the die cutting step.

FIG. 10 is a schematic diagram of one particular implementation of the method shown in FIG. 5.

FIG. 11 is a schematic diagram of one particular implementation of the method shown in FIG. 5.

Fig. 12 is a schematic size diagram of a reinforcing structure fabricated by the method shown in fig. 11.

Fig. 13 is a schematic view of the reinforcing structure applied to the electronic device according to the embodiment of the present application.

Fig. 14 is a schematic view of the reinforcing structure applied to the electronic device according to the embodiment of the present application.

Fig. 15 is a schematic view of the reinforcing structure according to the embodiment of the present application applied to an electronic device.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

For the mobile phone adopting the flexible display screen, as the material of the flexible display screen is softer, a reinforcing structure is usually arranged to support the whole flexible display screen and enhance the strength of the flexible display screen. For example, as shown in fig. 1, the flexible display 120 has a complete reinforcing structure 140 under it for supporting. The reinforcing structure 140 is adhered under the flexible display screen 120, and the flexible display screen 120 may be, for example, an OLED display screen or an LED display screen. The reinforcing structure 140 includes a steel plate 142 and a TPU layer 141, wherein the TPU layer 141 and the steel plate 142 may be bonded by Optically Clear Adhesive (OCA), PSA, transparent glue, and the like, and the thickness of the bonding material is usually 0.02 mm. .

As shown in fig. 1, the laminated structure of the flexible display 120 is composed of a cover film (cover film) or Ultra-Thin Glass (UTG) 121, a touch film layer (touch film)122, a polarizer (Polarizers, POL)123, an OLED light emitting layer 124, and the like in this order, and the lamination may be bonded to each other by, for example, OCA or PSA. It should be understood that fig. 1 is merely illustrative and that the reinforcement structure of the present application may be applied to any flexible display panel having a laminate structure.

When carrying out optical fingerprint detection under the screen, the fingerprint that is located flexible display screen below detects the module and needs to gather the light signal that the finger of flexible display screen top returned, consequently, need lie in the position of fingerprint detection module top on the reinforcement structure and carry out the windowing. For example, the electronic device 10 shown in fig. 2 includes a flexible display 120, a fingerprint detection module 130, and a reinforcement structure 140. Fingerprint detection module 130 sets up the subregion in flexible display screen 120 below. Reinforcing structure 140 bonds in the lower surface of flexible display screen 120 in order to support flexible display screen 120, and the windowing on the reinforcing structure 140 is located the top of fingerprint detection module 130 to the light signal that the finger of flexible display screen top was returned can see through this windowing and reach fingerprint detection module 130.

Fingerprint detection module 130 includes optical fingerprint sensor, and this optical fingerprint sensor includes the response array 133 that has a plurality of optical sensing unit 131. The sensing area or the sensing area where the sensing array 133 is located is the fingerprint detection area 121 of the fingerprint detection module 130. As shown in fig. 3, the fingerprint detection area 121 may be located within a display area of the flexible display 120. The flexible display screen in fig. 3 is also called a folding display screen, and can be made of flexible materials such as plastic or metal. Wherein (a) in fig. 3 shows the fold-in display screen 120 with its display area located on the inner side of the display screen 120; fig. 3 (b) shows the fold-out display with the display area located outside the display 120.

The area of fingerprint detection area 121 can be different with the area of fingerprint detection module 130's response array 133, for example, through the light path design of lens formation of image, the light path design is folded to reflective or other light convergence or light path designs such as reflection, can be so that the area of fingerprint detection area 121 of fingerprint detection module 130 is greater than the area of fingerprint detection module 130's response array 133. Or, if adopt for example the light collimation mode to carry out the light path guide, fingerprint detection module 130's fingerprint detection area 121 also can design into the area with fingerprint detection module 130's sensing array and be unanimous basically.

Therefore, when the user needs to unlock or otherwise verify the fingerprint of the electronic device 10, the user only needs to press a finger on the fingerprint detection area 121 of the flexible display screen 120, so as to input the fingerprint.

Fingerprint detection module 130 includes light detection portion 134 and optical assembly 132. The light detection portion 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 may be a Photo detector (Photo detector) array, which includes a plurality of Photo detectors distributed in an array, and the Photo detectors may be used as the above-mentioned optical sensing units. The optical assembly 132 may be disposed over the sensing array 133 of the light detection portion 134, and may include, for example, a Filter layer (Filter), an optical path directing structure, and other optical elements. The filter layer may be used to filter out ambient light penetrating through the finger, and the light path guiding structure may be used to guide light returning from the surface of the finger to the sensor array 133.

The optical path guiding structure of the optical component 132 may be embodied as a Collimator (collimater) layer fabricated on a semiconductor silicon wafer, which has a plurality of collimating units or a micro-hole array. The collimating unit may be embodied as a small hole, and light returning from the finger is vertically incident and passes through the collimating unit to be received by the optical sensing unit below, while light with an excessive incident angle is attenuated by multiple reflections inside the collimating unit. Therefore, each optical sensing unit can only receive the light returned by the fingerprint pattern directly above the optical sensing unit, so that the sensing array 133 can detect the fingerprint image of the finger.

Alternatively, the optical path guiding structure may be an optical Lens (Lens) layer having one or more Lens units for converging the light returning from the finger to the sensing array 133 of the light detecting part 134 therebelow, so that the sensing array 133 images the fingerprint image of the finger based on the light returning from the finger.

Alternatively, the optical path guiding structure may employ a Micro-Lens (Micro-Lens) layer having a Micro-Lens array formed of a plurality of Micro-lenses, which may be formed above the sensing array 133 of the light detecting part 134 through a semiconductor growth process or other processes, and each Micro-Lens may correspond to one of the sensing cells of the sensing array 133, respectively. Further, a light blocking layer with micro holes can be further included between the microlens layer and the sensing units, wherein the micro holes are formed between the corresponding microlenses and the sensing units, the light blocking layer can block optical interference between the adjacent microlenses and the sensing units, and light rays corresponding to each sensing unit can pass through the corresponding microlenses, converge into the corresponding micro holes, and are transmitted to the sensing units through the micro holes so as to perform optical fingerprint imaging.

However, since the flexible display screen is relatively flexible, after the window is opened at the position corresponding to the reinforcing structure, the edge of the window appears obvious traces on the flexible display screen, and particularly, when a user presses the fingerprint detection area above the window, not only the obvious trace of the window appears on the flexible display screen, but also the fingerprint detection area of the flexible display screen may sink due to the pressing of a finger.

For this reason, this application provides a scheme, sets up transparent material in the windowing of reinforcement structure, and the light signal that the finger of flexible display screen top was returned can see through the transparent material arrival optical detection module in the windowing, can not lead to the fact the influence to the use of the optical detection device under the flexible display screen to because transparent material can support the flexible display screen is located the detection area of windowing top has consequently alleviateed the influence that the windowing led to the fact to flexible display screen outward appearance.

Fig. 4 shows a reinforcing structure of an embodiment of the present application. As shown in fig. 4, the reinforcing structure 400 is disposed between the flexible display screen 120 and the optical detection module of the electronic device. The reinforcing structure 400 includes a steel plate 410 and a buffer layer 420.

Wherein, a first window 411 is disposed on a portion of the steel plate 410 above the optical detection module.

The steel plate 410 may also be referred to as a steel patch or slab, and may have a thickness of 0.15 or 0.2 mm, but is not limited thereto.

The buffer layer 420 is formed of 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 120 above the first window 411, and the optical signal returned by the target above the detection area passes through the first window 411 and reaches the optical detection module.

The cushioning material may be, for example, TPU or silicone. Hereinafter, the TPU is described as an example.

The optical detection module can be the fingerprint detection module 130 shown in fig. 2 and fig. 3, or 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 for receiving a fingerprint optical signal which returns from a finger above the flexible display screen and passes through the flexible display screen so as to perform fingerprint detection; the vital sign detection module is used for receiving vital sign optical signals which return through the finger and pass through the flexible display screen so as to detect vital signs; the ambient light sensor chip is used for receiving an ambient light signal passing through the flexible display screen so as to detect ambient light.

In the following, the fingerprint detection module 130 is taken as an example for description, and at this time, the optical signal passing through the first window 411 is a fingerprint optical signal returned by a finger above the flexible display 120.

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

That is, the thicknesses of the steel plate 410 and the portion of the buffer layer 420 outside the first window 411 may be 0.15 mm and 0.05 mm, respectively; alternatively, the thicknesses of the steel plate 410 and the portion of the buffer layer 420 outside the first window 411 may be 0.1 mm and 0.1 mm, respectively.

In this embodiment, be provided with the reinforcement structure below the flexible display screen, can carry out whole screen to this flexible display screen and support, the relevant position of this reinforcement structure is provided with the windowing, consequently can not cause the influence to the use of the optical detection device under the flexible display screen. And owing to adopted transparent material to fill this windowing, the optical signal that the target of flexible display screen top was returned can see through the transparent material arrival optical detection module in the windowing to can alleviate the vestige that the edge of windowing appears on flexible display screen, avoid causing the influence to flexible display screen's outward appearance.

Fig. 5 shows a method of manufacturing the above-described steel sheet 400, which includes some or all of the following steps, as shown in fig. 5.

In step 510, a steel plate 410 is obtained.

In step 520, a first window 411 is formed on the portion of the steel plate 410 above the optical inspection module.

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

In the following, several possible implementations of the reinforcement structure provided in the present application are described in detail with reference to fig. 6 to 9.

Example 1

In the reinforcing 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 transparent materials, and the steel plate 410 and the transparent material are integrally formed by an oil pressure process.

The reinforcing structure 400 may be implemented by an oil pressure process. The transparent material covers the steel plate 410 and fills the first window 411 through an oil pressure process, so that the steel plate 410 and the transparent material are integrally formed.

Generally, the buffer layer shown in fig. 1, i.e., the TPU layer 141, is adhered to the steel plate 142 by OCA or PSA. The TPU layer 141 is in turn adhered to the flexible display 120. The process of secondary pasting may generate higher cost, and because there is a window on the steel plate 142, if the corresponding positions on the TPU layer 141 and the pasting material are also windowed, the consistency of the pasting between the TPU layer 141 and the steel plate 142 is poor due to the overlapping of the errors of the pasting caused by the secondary pasting, and the bonding force between the buffer layer 420 and the steel plate 410 is affected.

If the TPU layer 141 and the steel plate 142 are attached after the transparent material is filled in the first window 411, although the trace 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 a large number of times, the bonding force between the buffer layer 414 and the steel plate 412 is insufficient, which may cause the flexible display screen to sink.

In example 1, the buffer material filling the first window 141 and covering the region of the steel plate 410 other than the first window 411 is a transparent material, and the transparent material is formed on the surface of the steel plate 410 by an oil pressure process and filled in the first window 411. Therefore, the buffer layer 420 formed of a transparent material and the steel plate 410 are integrally formed, the bonding force between the buffer layer 420 and the steel plate 410 is stronger, and the flexible display screen is not easily depressed in the detection region by frequent pressing of a user.

In one implementation, the steel plate 410 may be a steel plate with a blackened surface, for example, a black paint is coated on the surface of the steel plate by Physical Vapor Deposition (PVD).

In this case, as shown in fig. 6, a first window 411 may be formed in the blackened steel plate 410, and a buffer layer 420 may be formed to cover the steel plate 410 and to fill the first window 411.

Fig. 6 (a) shows a blackened steel sheet 410.

In fig. 6 (b), a first window 411 and a rib 416 are formed on the blackened steel sheet 410. The ribs 416 are used to aid in the positioning of the material during the machining process.

In fig. 6 (c), a buffer layer 420 is formed by covering the surface of the steel plate 410 with a transparent material and filling the first windows 411 through an oil pressure process.

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

In fig. 6 (d), the excess transparent material is removed by die cutting, and the reinforcing ribs 416 are removed, to finally obtain the reinforcing structure 400 shown in fig. 6 (e).

Further, in this embodiment, at least one second window 414 may be further disposed on the steel plate 410. Wherein the transparent material also fills the at least one second window 414. As shown in fig. 7, before the buffer layer 420 is formed by the oil pressure process, at least one second window 414 is formed on the steel plate 410.

Fig. 7 (a) shows a blackened steel sheet 410.

In fig. 7 (b), a first window 411, at least one second window 414, and a reinforcing rib 416 are formed on a steel plate 410.

In fig. 7, 4 second windows 414 are taken as an example for explanation, and the 4 second windows 414 are respectively located in four corner regions of the steel plate 410. But not limited thereto, the number, shape and position of the second windows 414 may be changed according to the actual situation.

In fig. 7 (c), a buffer layer 420 is formed by covering the surface of the steel plate 410 with a transparent material and filling the first windows 411 and the at least one second window 414 through an oil pressure process.

In fig. 7 (d), the excess transparent material is removed by die cutting, and the reinforcing ribs 416 are removed, to finally obtain the reinforcing structure 400 shown in fig. 7 (e).

The at least one second window 414 is formed in the steel plate 410 and filled with the transparent material, so that the coupling force between the buffer layer 420 and the steel plate 410 can be further strengthened, and thus the flexible display screen is not easily depressed in the sensing region due to frequent pressing by a user.

In another implementation, the surface of the steel plate 410 may be composed of a first region 412 surrounding the first window 411, and a second region 413 surrounding the first region 412. That is, the area of the surface of the steel plate 410 except the first window 411 may be divided into a first area 412 and a second area 413.

The portion of the steel plate 410 located in the second region 413 is in a grid shape.

The first region 412 may be used to bond the optical detection module. That is, the optical detection module may be adhered to the first region 412 by an adhesive material.

At this time, since the steel plate 410 of the second area is in a grid shape, and the transparent material simultaneously fills the first window 411 and the grid openings of the second area through the oil pressure process and covers the surface of the steel plate 410, the area of the steel plate 410 except the first window 411 cannot be shielded from light, and therefore, a light shielding material, such as black mylar, needs to be adhered to the second area 413 to block ambient light from affecting the effective light signal collected by the optical detection module below the steel plate 410.

As shown in fig. 8 in particular, the reinforcing structure 400 in this embodiment can be implemented by the following steps.

Fig. 8 (a) shows a steel plate 410.

Here, the steel plate 410 is provided with a first window 411, and regions other than the first window 411 are divided into a first region 412 and a second region 413. The portion of the steel plate 410 located in the second region 413 is in a grid shape, that is, the steel plate at the second region 413 is a grid-shaped steel plate.

In fig. 8 (b), a transparent material, for example, transparent TPU or transparent silicone rubber, is coated on the surface of the steel plate 410 by an oil pressure process to fill the mesh openings of the first windows 411 and the second regions 413, thereby forming the buffer layer 420.

The oil pressure process enables the steel plate 410 and the buffer layer 420 to be integrally formed, and has stronger bonding force. In addition, in the process of the oil pressure process, transparent materials are possibly filled in the meshes of the steel plate, so that the binding force between the buffer layer and the steel plate is further enhanced.

After removing the excess transparent material by die cutting, in fig. 8 (c), a light shielding material, such as black mylar, is adhered to the second area 413 and at least a portion of the first area 412 of the steel plate 410.

The reinforcing structure 400 shown in fig. 8 (d) is finally obtained.

Here, the light blocking material may be attached to the surface of either side of the steel plate 410, but should cover the entire second area 413 and needs to cover at least a part of the first area 412. The light shielding material shown in (d) in fig. 8 covers the entire second region 413 and extends inward to a part of the first region 412.

During the oil pressure process, the transparent material may be disposed beyond the edge of the steel plate 410, for example, 0.1 mm beyond the edge of the steel plate 410, as shown in fig. 9, to facilitate the above-described die cutting step.

In this way, with the reinforcing structure 400 manufactured by the method shown in fig. 6 to 8, only the first window 411 can transmit the optical signal for the optical detection module to detect the target, and the portion of the steel plate 410 located in the other area can absorb the ambient light, thereby avoiding affecting the effective optical signal in the first window 411.

Example 2

In the reinforcing structure 400, the surface of the steel plate 410 except for the first window 411 may be covered with a black material so that the steel plate 410 and the black material are integrally formed; thereafter, the first window 411 is filled with a transparent material.

For example, the surface of the steel plate 410 may be composed of a first region 412 surrounding the first window 411, and a second region 413 surrounding the first region 412. That is, the area of the surface of the steel plate 410 except the first window 411 may be divided into a first area 412 and a second area 413.

Wherein, the buffer material covering the second region 413 is a black material, and the black material and the steel plate 410 are integrally formed through an oil pressure process.

As a part of the buffer layer 420, the black material covers a portion of the surface of the steel plate 410 in the second region 413 through the hydraulic process, and the bonding force between the steel plate 410 and the buffer layer 420 is stronger than that in a method of directly bonding the steel plate 410 and the buffer layer 420.

As shown in fig. 10 in particular, the reinforcing structure 400 in this embodiment can be realized by the following steps.

Fig. 10 (a) shows a steel plate 410.

In fig. 10 (b), a first window 411 and a rib 416 are formed in a steel plate 410.

In (c) of fig. 10, the second region 413 of the steel plate 410 is covered with a black material through an oil pressure process.

The oil pressure process makes the steel plate 410 and the black material integrally formed, and has stronger bonding force.

In fig. 10 (d), the first window 411 is filled with a transparent material and covers the first region 412.

After removing the excess black material and the reinforcing ribs 416 by die cutting, the reinforcing structure 400 as shown in (e) of fig. 10 is obtained.

Similar to fig. 9, in this embodiment, the black material may be disposed beyond the edge of the steel plate 410, for example, 0.1 mm beyond the edge of the steel plate 410, during the oil pressure process, to facilitate the above-described die cutting step.

Further, a portion of the steel plate 410 located in the first region 412 may be further provided with a plurality of through holes 415, and the transparent material may also fill the plurality of through holes 415, as shown in fig. 11.

Fig. 11 (a) shows a steel plate 410.

In fig. 11 (b), a first window 411, a plurality of through holes 415, and a rib 416 are formed in a steel plate 410.

In fig. 11 (c), the second region 413 of the steel plate 410 is covered with a black material through an oil pressure process.

In fig. 11 (d), the first window 411 and the plurality of through holes 415 are filled with a transparent material and cover the first region.

Then, by die cutting, the excess black material is removed, and the reinforcing ribs 416 are removed, finally obtaining the reinforcing structure 400 as shown in fig. 11 (e).

A plurality of through holes 415 are designed in the first area 412, so that the locking effect between the filled transparent material and the steel plate 410 is facilitated, the bonding strength of the transparent material in the whole first windowing 411 area is enhanced, and the reliability of the steel plate 410 is improved.

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

For example, as shown in fig. 12, the cross-section of the first window 411 may be a square with a side of 7 mm.

For another example, the first area 412 is square and has an outer diameter of 10 mm, i.e., the first area 412 is formed by expanding 1.5 mm with respect to each side of the first window 411; alternatively, the first area 412 may be formed by an outward expansion of 0.65 mm with respect to each side of the first window 411.

For another example, the diameter of the through-hole 415 is 4 mm.

The reinforcing structures 400 of the above embodiments 1 and 2 can be adhered to the flexible display 120 and the optical detection module in the following ways.

In fig. 13 to 15, H is a thickness of the fingerprint detection module 130, for example, H is 0.407 mm. The middle frame 800 of the electronic device is disposed below the reinforcing structure 400, and the fingerprint detection module 130 is accommodated in the through hole or the blind hole of the middle frame 800. P is the distance between the fingerprint detection module 130 and the reinforcing structure 400, for example, P is 0.174.

Mode 1

The middle frame 800 of the electronic device is provided with a through hole for receiving the optical detection module.

As shown in fig. 13, the optical detection module 130 is adhered to a region around the window, such as the first region 412, on the first surface of the steel plate 410 by the PSA 151. The thickness of the PSA 151 may be, for example, 0.1 millimeters.

Fingerprint detection module 130 includes PET layer 152. The thickness of the PET layer 152 may be, for example, 0.2 millimeters. Wherein PSA 151 is bonded between PET layer 152 and reinforcing structure 400.

Mode 2

As shown in fig. 14, a transparent supporting plate 430 is disposed below the steel plate 400, and the optical detection module 130 is adhered to the supporting plate 430 by PSA.

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

Fingerprint detection module 130 includes PET layer 152. Wherein PSA 151 is bonded between PET layer 152 and support plate 430.

Because the windowing below is provided with the optical detection module, for example fingerprint detection module 130, when utilizing fingerprint detection module 130 to detect the user finger, the user finger can press the detection area that is located in flexible display screen 120 and corresponds with the position of first windowing 411, presses for a long time and probably leads to the sunken water ripple that forms in this detection area, influences user experience. The support plate 430 may further enhance the strength of the fenestrated area, reducing or eliminating water ripple.

Mode 3

The middle frame 800 of the electronic device is provided with blind holes for accommodating the optical detection module.

As shown in fig. 15, a gap 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 reinforcing structure 400.

The depth of the blind hole may be 0.4 mm, and in this case, the interval between the optical detection module 130 and the middle frame 800 may be 0.2 mm.

The above three modes of overall machine application can be applied to any of the reinforcing structures 400 described in embodiments 1 and 2.

Preferably, in the flexible display screen 120, the reinforcing structure 400, and the regions for light transmission in the materials such as silica gel, TPU, glass, and sapphire used in the optical detection module in the embodiment of the present application, the transmittance thereof should be greater than 90%, and the surface finish requirement is Ra 0.03-0.05, so as to ensure that the optical detection module performs target detection more accurately.

The present application further provides a display assembly comprising: a flexible display screen; and the reinforcing structure in any of the above embodiments, the reinforcing structure is disposed below the flexible display screen to support the flexible display screen.

The present application further provides an electronic device, including: an optical detection module; a flexible display screen; and a reinforcing structure as described in any of the above embodiments.

The electronic device may be a portable or mobile computing device such as a terminal device, a mobile phone, a tablet computer, a notebook computer, a desktop computer, a game device, a vehicle-mounted electronic device or a wearable intelligent device, and other electronic devices such as an electronic database, an automobile, and an Automated Teller Machine (ATM). This wearable smart machine includes that the function is complete, the size is big, can not rely on the smart mobile phone to realize complete or partial functional equipment, for example smart watch or smart glasses etc to and include only be concentrated on a certain kind of application function and need with other equipment like the equipment that the smart mobile phone cooperation was used, for example all kinds of intelligent bracelet, intelligent ornament etc. that carry out the physical sign monitoring.

It should be noted that, without conflict, the embodiments and/or technical features in the embodiments described in the present application may be arbitrarily combined with each other, and the technical solutions obtained after the combination also fall within the protection scope of the present application.

The system, apparatus and method disclosed in the embodiments of the present application can be implemented in other ways. For example, some features of the method embodiments described above may be omitted or not performed. The above-described device embodiments are merely illustrative, the division of the unit is only one logical functional division, and there may be other divisions when the actual implementation is performed, and a plurality of units or components may be combined or may be 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 includes electrical, mechanical or other connections.

It should be understood that the specific examples in the embodiments of the present application are for the purpose of promoting a better understanding of the embodiments of the present application, and are not intended to limit the scope of the embodiments of the present application, and that various modifications and variations can be made by those skilled in the art based on the above embodiments and fall within the scope of the present application.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a reinforcement structure, its characterized in that is applied to the electronic equipment that has flexible display screen, in order to support flexible display screen, reinforcement structure set up in flexible display screen with between the optical detection module in the electronic equipment, wherein, reinforcement structure includes:

2. The reinforcing structure of claim 1, wherein the cushioning material is Thermoplastic Polyurethane (TPU) or silicone.

3. The reinforcing structure according to claim 1 or 2, wherein the cushioning material filling the first window and covering the area of the steel plate other than the first window are the transparent material, and the steel plate and the transparent material are integrally formed by an oil pressure process.

4. The reinforcing structure of claim 3, wherein the steel sheet is further provided with at least one second window, and the transparent material further fills the at least one second window.

5. The reinforcing structure of claim 4, wherein the at least one second fenestration is located at four top corner regions of the steel sheet.

6. The reinforcing structure of claim 3, wherein the steel sheet is a steel sheet having a blackened surface.

7. The reinforcing structure of claim 3, wherein the surface of the steel plate is composed of a first region surrounding the first window and a second region surrounding the first region, wherein the portion of the steel plate located in the second region is in a grid shape, the transparent material further fills the grid openings of the second region, and the light blocking material is further bonded to the second region and at least a portion of the first region.

8. The reinforcing structure of claim 7, wherein the first region is configured to bond the optical inspection module.

9. The reinforcing structure of claim 7, wherein the light blocking material is black mylar.

10. The reinforcing structure according to claim 1 or 2, wherein the surface of the steel plate is composed of a first region surrounding the first window, and a second region surrounding the first region, wherein the cushioning material covering the second region is a black material, and the black material and the steel plate are integrally molded by an oil pressure process.

11. The reinforcing structure of claim 10, wherein the portion of the steel plate located in the first region is provided with a plurality of through holes, and the transparent material further fills the plurality of through holes.

12. The reinforcing structure according to claim 1 or 2, wherein the optical detection module is bonded to the steel sheet in the area around the first window by a Pressure Sensitive Adhesive (PSA).

13. The reinforcing structure according to claim 1 or 2, wherein a transparent supporting plate is further arranged below the steel plate, and the optical detection module is bonded to the supporting plate through a PSA.

14. The reinforcing structure of claim 13, wherein the support plate is a glass plate or a sapphire plate.

15. The reinforcing structure of claim 1 or 2, wherein a middle frame of the electronic device is disposed below the reinforcing structure, and the optical detection module is located in the through hole of the middle frame.

16. The reinforcing structure of claim 1 or 2, wherein a middle frame of the electronic device is disposed below the reinforcing structure, the optical detection module is located in the blind hole of the middle frame, and a space is disposed between the optical detection module and the middle frame.

17. The reinforcing structure of claim 1 or 2, wherein 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.

18. A display assembly, comprising:

a flexible display screen; and

the reinforcing structure of any one of claims 1 to 17, the reinforcing structure being disposed below the flexible display to support the flexible display.

19. An electronic device, comprising:

an optical detection module;

a flexible display screen; and the number of the first and second groups,

the reinforcing structure according to any one of claims 1 to 17.