CN210142333U

CN210142333U - Fingerprint identification device and electronic equipment

Info

Publication number: CN210142333U
Application number: CN201921185802.9U
Authority: CN
Inventors: 侯志明
Original assignee: Shenzhen Goodix Technology Co Ltd
Current assignee: Shenzhen Goodix Technology Co Ltd
Priority date: 2019-04-18
Filing date: 2019-07-25
Publication date: 2020-03-13
Anticipated expiration: 2029-07-25
Also published as: CN110770750A; CN110770750B; WO2020211062A1; CN214225933U

Abstract

The fingerprint identification device is capable of achieving under-screen fingerprint identification of the flexible display screen. The device is applied to electronic equipment with a flexible display screen, a fingerprint detection area of the device is positioned in a display area of the flexible display screen, and the device comprises: the first buffer layer is arranged on the lower surface of the flexible display screen; the supporting piece is arranged below the first buffer layer and used for supporting the part, located in the fingerprint detection area, of the flexible display screen, and a gap exists between the supporting piece and the first buffer layer; the optical fingerprint module is arranged below the supporting piece and used for detecting an optical signal returned by the finger above the fingerprint detection area.

Description

Fingerprint identification device and electronic equipment

This application claims priority from the PCT application with the application number PCT/CN2019/083322, entitled "fingerprint recognition device and electronic device", filed in 2019, 18/04, which is incorporated by reference in its entirety.

Technical Field

The embodiments of the present application relate to the field of biometric identification, and more particularly, to an apparatus and an electronic device for fingerprint identification.

Background

With the rapid development of the mobile phone industry, the fingerprint identification is more and more emphasized by people, and the practicability of the under-screen fingerprint identification technology becomes a requirement of the public. The technology for identifying the fingerprints under the optical screen is that light emitted by a light source is collected by an optical fingerprint module to be reflected or transmitted by a finger to form reflected light, and fingerprint information of the finger is carried in the reflected light, so that the identification of the fingerprints under the screen is realized.

To the cell-phone that adopts flexible display screen, when pressing down fingerprint when detecting on the display screen as the finger, because the material of display screen is softer, consequently the pressing down region of finger can sink, not only influences user experience, still influences the fingerprint detection performance of optics fingerprint module, probably causes the impaired of flexible display screen and optics fingerprint module even.

SUMMERY OF THE UTILITY MODEL

The application provides a fingerprint identification's device and electronic equipment can realize fingerprint identification under the screen of flexible display screen.

In a first aspect, an apparatus for fingerprint identification is provided, where the apparatus is applied to an electronic device having a flexible display screen, a fingerprint detection area of the apparatus is located in a display area of the flexible display screen, and the apparatus includes:

the first buffer layer covers the lower surface of the flexible display screen;

the supporting piece is arranged below the first buffer layer and used for supporting the part, located in the fingerprint detection area, of the flexible display screen, and a gap exists between the supporting piece and the first buffer layer;

the optical fingerprint module is arranged below the supporting piece and used for detecting an optical signal returned by the finger above the fingerprint detection area.

In one possible implementation manner, the first buffer layer is bonded to the lower surface of the flexible display screen through a first adhesive layer.

In one possible implementation manner, the first adhesive layer is OCA adhesive.

In one possible implementation, the material of the first buffer layer is TPU, PI, or PET.

In a possible implementation manner, a layer of metal sheet is arranged below the first buffer layer, a light-transmitting window is arranged on the metal sheet, and the light-transmitting window of the metal sheet is located below the fingerprint detection area.

In a possible implementation manner, the metal sheet is adhered to the lower surface of the first buffer layer through a second adhesive layer.

In one possible implementation manner, the second adhesive layer is OCA adhesive.

In a possible implementation manner, the support covers the light-transmitting window of the metal sheet, and the edge of the support is fixed on the lower surface of the metal sheet.

In a possible implementation manner, the metal sheet is disposed on an upper surface of a middle frame of the electronic device, and the supporting member is located in a light-transmitting window of the middle frame.

In one possible implementation, the apparatus further includes: and the second buffer layer is arranged on the lower surface of the first buffer layer and is positioned in the light transmission window of the metal sheet, wherein the gap exists between the second buffer layer and the support piece.

In one possible implementation, the gap is 0.15 millimeters.

In a possible implementation manner, the second buffer layer is adhered to the lower surface of the first buffer layer through a second adhesive layer.

In one possible implementation, the material of the second buffer layer is TPU, PI, or PET.

In one possible implementation, the material of the support is optical glass or resin.

In one possible implementation, the optical fingerprint module is disposed on a lower surface of the supporting member.

In one possible implementation, the optical fingerprint module is disposed on a middle frame of the electronic device.

In a second aspect, an apparatus for fingerprint identification is provided, where the apparatus is applied to an electronic device having a flexible display screen, a fingerprint detection area of the apparatus is located in a display area of the flexible display screen, and the apparatus includes:

the first buffer layer is arranged on the lower surface of the flexible display screen and is positioned in the light-transmitting window of the first foam layer on the lower surface of the flexible display screen;

In one possible implementation manner, the first buffer layer is attached to the lower surface of the flexible display screen through OCA glue.

In one possible implementation, the thickness of the first foam layer is 0.1 mm.

In a possible implementation mode, the lower surface on the cotton layer of first bubble still is provided with the cotton layer of second bubble, the light transmission window on the cotton layer of second bubble is located the below of the light transmission window on the cotton layer of first bubble just is less than the light transmission window on the cotton layer of first bubble, with the light transmission window on the cotton layer of first bubble with the edge of the light transmission window on the cotton layer of second bubble forms the step, wherein, first buffer layer sets up on the step.

In one possible implementation, the thickness of the second foam layer is 0.15 mm.

In a possible implementation manner, a layer of metal sheet is arranged below the second foam layer, a light-transmitting window is arranged on the metal sheet, and the light-transmitting window of the metal sheet is located below the fingerprint detection area.

In one possible implementation, the apparatus further includes: the second buffer layer is arranged on the upper surface of the support piece and is positioned in the light transmission window of the metal sheet, wherein the gap is a gap between the second buffer layer and the support piece.

In one possible implementation, the upper surface of the second buffer layer is at the same height as the upper surface of the metal sheet.

In one possible implementation, the gap is 0.15 millimeters.

In a possible implementation manner, the second buffer layer is adhered to the upper surface of the support by OCA glue.

In a third aspect, an electronic device is provided, which includes:

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

the apparatus for fingerprinting of the first aspect or any possible implementation form of the first aspect, or the apparatus for fingerprinting of the second aspect or any possible implementation form of the second aspect.

Based on above-mentioned technical scheme, set up first buffer layer through the lower surface at flexible display screen to and set up support piece in the below of first buffer layer, make support piece can provide the supporting role for flexible display screen. And because the existence of first buffer layer, direct contact does not have between support piece and the flexible display screen, has avoided the damage to the flexible display screen. In addition, due to the gap between the first buffer layer and the support piece, the proper gap can prevent water ripples generated when the flexible display screen is deformed and reduce the deformation space of the flexible display screen after being pressed.

Drawings

Fig. 1 is a schematic structural diagram of an electronic device to which the present application is applicable.

Fig. 2 is a schematic cross-sectional view of the electronic device shown in fig. 1 along the direction a-a'.

Fig. 3 is a schematic block diagram of an apparatus 300 for fingerprint identification according to an embodiment of the present application.

Fig. 4 is a schematic diagram of one possible configuration of the apparatus 300 shown in fig. 3.

Fig. 5 is a schematic diagram of one possible configuration of the apparatus 300 shown in fig. 3.

Fig. 6 is a schematic diagram of one possible configuration of the apparatus 300 shown in fig. 3.

Fig. 7 is a schematic view of one possible combination between the cushioning layer and the foam layer on the lower surface of the flexible display in the device 300 shown in fig. 3.

Fig. 8 is a schematic diagram of one possible configuration of the apparatus 300 shown in fig. 3.

Fig. 9 is a schematic diagram of one possible configuration of the apparatus 300 shown in fig. 3.

Detailed Description

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

It should be understood that the embodiments of the present application can be applied to optical fingerprint systems, including but not limited to optical fingerprint identification systems and medical diagnostic products based on optical fingerprint imaging, and the embodiments of the present application are only described by way of example, but should not be construed as limiting the embodiments of the present application, and the embodiments of the present application are also applicable to other systems using optical imaging technology, etc.

As a common application scenario, the optical fingerprint system provided by the embodiment of the application can be applied to smart phones, tablet computers and other mobile terminals or other terminal devices with display screens; more specifically, in the terminal device, the optical fingerprint module may be disposed in a partial area or a full area below the display screen, so as to form an Under-screen (or Under-screen) optical fingerprint system. Or, the optical fingerprint module can also be partially or completely integrated inside the display screen of the terminal device, so as to form an In-display or In-screen optical fingerprint system.

Fig. 1 and 2 show schematic views of electronic devices to which embodiments of the present application may be applied. Fig. 1 is a schematic diagram of an electronic device 10, and fig. 2 is a schematic partial cross-sectional view of the electronic device 10 shown in fig. 1 along a direction a-a'.

The electronic device 10 includes a display screen 120 and an optical fingerprint module 130. Wherein, the optical fingerprint module 130 is disposed in a local area below the display screen 120. The optical fingerprint module 130 includes an optical fingerprint sensor including a sensing array 133 having a plurality of optical sensing units 131. The sensing area or the sensing area where the sensing array 133 is located is the fingerprint detection area 121 of the optical fingerprint module 130. As shown in fig. 1, the fingerprint detection area 121 is located in the display area of the display screen 120. In an alternative embodiment, the optical fingerprint module 130 may be disposed at other positions, such as the side of the display screen 120 or the edge opaque region of the electronic device 10, and the optical path is designed to guide the optical signal from at least a part of the display region of the display screen 120 to the optical fingerprint module 130, so that the fingerprint detection region 121 is actually located in the display region of the display screen 120.

It should be understood that the area of the fingerprint detection area 121 may be different from the area of the sensing array 133 of the optical fingerprint module 130, for example, the area of the fingerprint detection area 121 of the optical fingerprint module 130 may be larger than the area of the sensing array 133 of the optical fingerprint module 130 through, for example, a light path design of lens imaging, a reflective folded light path design, or other light path designs such as light convergence or reflection. In other alternative implementations, if the light path is guided by, for example, light collimation, the fingerprint detection area 121 of the optical fingerprint module 130 may be designed to substantially coincide with the area of the sensing array of the optical fingerprint module 130.

Therefore, when the user needs to unlock or otherwise verify the fingerprint of the electronic device, the user only needs to press a finger on the fingerprint detection area 121 of the display screen 120, so as to input the fingerprint. Since fingerprint detection can be implemented in the screen, the electronic device 10 with the above structure does not need to reserve a special space on the front surface thereof to set a fingerprint key (such as a Home key), so that a full-screen scheme can be adopted, that is, the display area of the display screen 120 can be substantially extended to the front surface of the whole electronic device 10.

As an alternative implementation, as shown in FIG. 1, the optical fingerprint module 130 includes a light detection portion 134 and an optical assembly 132. The light detecting portion 134 includes the sensing array 133 and a reading circuit and other auxiliary circuits electrically connected to the sensing array 133, which can be fabricated on a chip (Die) by a semiconductor process, such as an optical imaging chip or an optical fingerprint sensor. The sensing array 133 is specifically a photo detector (photo detector) array, which includes a plurality of photo detectors distributed in an array, and the photo detectors can be used as the optical sensing units as described above. The optical assembly 132 may be disposed above the sensing array 133 of the light detecting portion 134, and may specifically include a Filter (Filter) for filtering out ambient light penetrating through the finger, a light guiding layer or light path guiding structure for guiding light reflected or transmitted from the surface of the finger to the sensing array 133 for optical detection, and other optical elements.

In particular implementations, the optical assembly 132 may be packaged with the same optical fingerprint component as the light detection portion 134. For example, the optical component 132 may be packaged in the same optical fingerprint chip as the optical detection portion 134, or the optical component 132 may be disposed outside the chip where the optical detection portion 134 is located, for example, the optical component 132 is attached to the chip, or some components of the optical component 132 are integrated into the chip.

For example, the light guide layer may specifically be a Collimator (collimater) layer manufactured on a semiconductor silicon wafer, and the collimater unit may specifically be a small hole, and in reflected light reflected from a finger, light perpendicularly incident to the collimater unit may pass through and be received by an optical sensing unit below the collimater unit, and light with an excessively large incident angle is attenuated by multiple reflections inside the collimater unit, so that each optical sensing unit can basically only receive reflected light reflected from a fingerprint pattern directly above the optical sensing unit, and the sensing array 133 can detect a fingerprint image of the finger.

In another implementation, the light guide layer or the light path guiding structure may also be an optical Lens (Lens) layer, which has one or more Lens units, such as a Lens group composed of one or more aspheric lenses, and is used to converge the reflected light reflected from the finger to the sensing array 133 of the light detection portion 134 therebelow, so that the sensing array 133 may perform imaging based on the reflected light, thereby obtaining the fingerprint image of the finger. Optionally, the optical lens layer may further form a pinhole in an optical path of the lens unit, and the pinhole may cooperate with the optical lens layer to enlarge a field of view of the optical fingerprint module 130, so as to improve a fingerprint imaging effect of the optical fingerprint module 130.

In other implementations, the light guide layer or the light path guiding structure may also specifically adopt a Micro-Lens (Micro-Lens) layer, the Micro-Lens layer has a Micro-Lens array formed by a plurality of Micro-lenses, which may be formed above the sensing array 133 of the light detecting portion 134 through a semiconductor growth process or other processes, and each Micro-Lens may respectively correspond to one of the sensing units of the sensing array 133. And other optical film layers, such as a dielectric layer or a passivation layer, can be formed between the microlens layer and the sensing unit. Further, a light blocking layer (or referred to as a light blocking layer, etc.) having micro holes may be further included between the microlens layer and the sensing unit, wherein the micro holes are formed between the corresponding microlenses and the sensing unit, and the light blocking layer may block optical interference between adjacent microlenses and the sensing unit, and enable light corresponding to the sensing unit to be converged inside the micro holes through the microlenses and transmitted to the sensing unit through the micro holes for optical fingerprint imaging.

It should be understood that several implementations of the light guiding layer or the light path guiding structure described above may be used alone or in combination. For example, a microlens layer may be further disposed above or below the collimator layer or the optical lens layer. Of course, when the collimator layer or the optical lens layer is used in combination with the microlens layer, the specific lamination structure or optical path thereof may need to be adjusted according to actual needs.

As an alternative implementation manner, the display screen 120 may adopt a display screen having a self-Light Emitting display unit, such as an Organic Light-Emitting Diode (OLED) display screen or a Micro-LED (Micro-LED) display screen. Taking an OLED display screen as an example, the optical fingerprint module 130 may use a display unit (i.e., an OLED light source) of the OLED display screen 120 located in the fingerprint detection area 121 as an excitation light source for optical fingerprint detection. When the finger 140 is pressed against the fingerprint detection area 121, the display 120 emits a beam of light 111 toward the target finger 140 above the fingerprint detection area 121, and the light 111 is reflected on the surface of the finger 140 to form reflected light or scattered light by the inside of the finger 140 to form scattered light. Because the ridges 141 and valleys 142 of the fingerprint have different light reflection capabilities, the reflected light 151 from the ridges and the reflected light 152 from the valleys have different light intensities, and after passing through the optical assembly 132, the reflected light is received by the sensing array 133 in the optical fingerprint module 130 and converted into corresponding electrical signals, i.e., fingerprint detection signals. Fingerprint image data can be obtained based on the fingerprint detection signal, and fingerprint matching verification can be further performed, so that an optical fingerprint identification function is realized on the electronic device 10.

In other implementations, the optical fingerprint module 130 may also use an internal light source or an external light source to provide an optical signal for fingerprint detection. In this case, the optical fingerprint module 130 may be suitable for a non-self-luminous display screen, such as a liquid crystal display screen or other passive luminous display screen. Taking an application to a liquid crystal display screen having a backlight module and a liquid crystal panel as an example, to support the underscreen fingerprint detection of the liquid crystal display screen, the optical fingerprint system of the electronic device 10 may further include an excitation light source for optical fingerprint detection, where the excitation light source may specifically be an infrared light source or a light source of non-visible light with a specific wavelength, and may be disposed below the backlight module of the liquid crystal display screen or in an edge area below a protective cover plate of the electronic device 10, and the optical fingerprint module 130 may be disposed below the edge area of the liquid crystal panel or the protective cover plate and guided through a light path so that the fingerprint detection light may reach the optical fingerprint module 130; alternatively, the optical fingerprint module 130 may be disposed below the backlight module, and the backlight module may open holes or perform other optical designs on film layers such as a diffusion sheet, a brightness enhancement sheet, and a reflection sheet to allow the fingerprint detection light to pass through the liquid crystal panel and the backlight module and reach the optical fingerprint module 130. When the optical fingerprint module 130 is used to provide an optical signal for fingerprint detection by using an internal light source or an external light source, the detection principle is consistent with the above description.

It should be appreciated that in a specific implementation, the electronic device 10 further includes a transparent protective cover plate, which may be a glass cover plate or a sapphire cover plate, positioned over the display screen 120 and covering the front surface of the electronic device 10. Therefore, in the embodiment of the present application, the pressing of the finger on the display screen 120 actually means pressing on the cover plate above the display screen 120 or the surface of the protective layer covering the cover plate.

In some implementations, the optical fingerprint module 130 may include only one optical fingerprint sensor, and the area of the fingerprint detection area 121 of the optical fingerprint module 130 is small and the position is fixed, so that the user needs to press the finger to a specific position of the fingerprint detection area 121 when inputting the fingerprint, otherwise the optical fingerprint module 130 may not collect the fingerprint image and cause poor user experience. In other alternative implementations, the optical fingerprint module 130 may specifically include a plurality of optical fingerprint sensors. A plurality of optics fingerprint sensor can set up side by side through the concatenation mode the below of display screen 120, just a plurality of optics fingerprint sensor's response area constitutes jointly optics fingerprint module 130's fingerprint detection area 121. That is to say, the fingerprint detection area 121 of optics fingerprint module 130 can include a plurality of subregions, and every subregion corresponds to one of them optics fingerprint sensor's induction zone respectively, thereby will the fingerprint detection area 121 of optics fingerprint module 130 can extend to the main area of the lower half of display screen, extend to the finger and press the region promptly usually, thereby realize blind formula fingerprint input operation. Alternatively, when the number of optical fingerprint sensors is sufficient, the fingerprint detection area 121 may also be extended to half or even the entire display area, thereby enabling half-screen or full-screen fingerprint detection.

In this embodiment, the display screen 120 may be a flexible display screen, or a foldable display screen. For example, the display screen 120 may be made of a flexible material such as plastic or metal.

In fig. 1, the display screen 120 shown in (a) is an inverted folding display screen, and the display area of the display screen 120 is on the inner side of the display screen 120; (b) the display screen 120 is shown as a fold-out display screen, with the display area of the display screen 120 outside of the display screen 120.

A flexible cover may be placed over the display screen 120 to protect the display screen 120. The material of the flexible cover plate may be, for example, Polyimide Film (PI) flexible resin or the like. Hereinafter, the pressing of the flexible display screen by the finger means that the flexible display screen and the flexible cover plate covered on the upper surface of the flexible display screen are pressed by the finger, and the description is omitted for the sake of brevity.

Since the flexible cover sheet does not provide support to the display screen 120. Under this condition, the user carries out the fingerprint detection according to pressing fingerprint detection area 121 on display screen 120, because the material of flexible display screen 120 is comparatively soft, consequently can produce in the region of pressing of finger and sink, not only influences user experience, but also can influence the fingerprint detection performance of optics fingerprint module, probably causes the damage of flexible display screen and optics fingerprint module even.

In view of this, an embodiment of the present application provides a fingerprint identification device, which can prevent a flexible display screen from being damaged due to finger pressing in a fingerprint detection process.

Fig. 3 is a schematic diagram of an apparatus 300 for fingerprint identification according to an embodiment of the present application. The apparatus 300 is applied to an electronic device having a flexible display screen, and a fingerprint detection area of the electronic device is located in a display area of the flexible display screen, for example, the fingerprint detection area may be located in a middle area or an edge area of a non-bending area of the flexible display screen.

The device 300 includes a first buffer layer 310, a support 320, and an optical fingerprint module 330.

Wherein the first buffer layer 310 is disposed on a lower surface of the flexible display screen.

The supporting member 320 is disposed below the first buffer layer 310, and is used for supporting a portion of the flexible display screen located in the fingerprint detection area, and a gap exists between the supporting member 320 and the first buffer layer 310.

The optical fingerprint module 330 is disposed under the supporter 320 for detecting an optical signal returned by a finger above the fingerprint detection area.

In this embodiment, owing to set up support piece 320 between flexible display screen and optics fingerprint module 330, the region of pressing of the finger on the flexible display screen can not cause because of support piece 320's support and sink to promote user experience, avoided the influence to optics fingerprint module 330's fingerprint identification performance.

In addition, the first buffer layer 310 is arranged on the lower surface of the flexible display screen, the first buffer layer 310 is located between the flexible display screen and the support pieces 320, and can buffer the pressing of fingers, so that the flexible display screen is not in direct contact with the hard support pieces 320, and the damage to the flexible display screen is avoided.

The first buffer layer 310 and the support member 320 may also be used to transmit optical signals, for example, the first buffer layer 310 and the support member 320 are transparent, so that the optical signals reflected or transmitted by the finger can pass through the first buffer layer 310 and the support member 320 to reach the optical fingerprint module 330. Optical fingerprint module 330 is according to light signal carries out fingerprint detection.

The support member 320 should have a certain rigidity to realize support of the flexible display screen.

For example, the supporter 320 may be made of a transparent material such as optical glass or optical resin.

The hardness of the first buffer layer 310 should be in a suitable range to support the flexible display screen and buffer the pressing of the flexible display screen by fingers.

For example, the first buffer layer 310 may be made of soft transparent material such as polyurethane (TPU), Polyimide (PI), or Polyester (PET).

The first buffer layer 310 may also be a composite layer, i.e. composed of a plurality of different material layers.

In general, when the distance between the flexible display screen and the support member 320 is too small, for example, several micrometers, the moire phenomenon caused by the light interference is more obvious. When the distance between the flexible display screen and the support member 320 is too large, the flexible display screen 310 may be damaged by finger pressing. Therefore, there should be a proper gap between the first buffer layer 310 and the support member 320 covered by the lower surface of the flexible display screen. The size of the gap between the first buffer layer 310 and the support member 320 can be adjusted to avoid the water ripple phenomenon caused by the deformation of the flexible display screen and reduce the deformation space of the flexible display screen.

The flexible display screen may be, for example, a flexible LCD display screen or a flexible OLED display screen. The light emitting layer of the flexible OLED display may include a plurality of organic light emitting diode light sources, and the optical fingerprint module 330 may use at least a portion of the organic light emitting diode light sources as an excitation light source for fingerprint identification.

The flexible display screen may correspond to the display screen 120 shown in fig. 1 and fig. 2, and reference may be made to the foregoing description on the display screen 120 for related descriptions, which are not repeated herein for brevity.

The optical fingerprint module 330 may correspond to the optical fingerprint module 130 shown in fig. 1 and 2. For example, the optical fingerprint module 330 may include an optical component and an optical fingerprint sensor. The optical assembly is used for guiding an optical signal returned by a finger to the optical fingerprint sensor, and the optical fingerprint sensor is used for acquiring fingerprint information of the finger according to the optical signal. The optical component may include, for example, an optical element such as a light guide layer, a filter layer, and the like. The light guide layer may be composed of, for example, an array of collimating holes, at least one lens, or a micro-lens array. In addition, the optical fingerprint module 330 may further include a flexible circuit board. For reference, reference may be made to the description of the optical fingerprint module 130 in fig. 1 and fig. 2, and for brevity, the description thereof is omitted here.

In this embodiment, the first buffer layer 310 may be a large-area buffer layer, for example, the first buffer layer 310 covers a lower surface of the flexible display screen; alternatively, the first buffer layer 310 may be a small-area buffer layer, for example, the first buffer layer 310 is disposed on the lower surface of the flexible display screen and located in the light-transmitting window of the first foam layer on the lower surface of the flexible display screen. Hereinafter, these two implementations of the first buffer layer 310 will be described in detail, respectively.

Mode 1

The first buffer layer 310 covers a lower surface of the flexible display screen.

For example, the first buffer layer 310 is adhered to the lower surface of the flexible display screen by a first adhesive layer 311.

The first Adhesive layer 311 may be, for example, Optically Clear Adhesive (OCA) or transparent glue. The OCA can be replaced by materials with low curing shrinkage rate, such as Optically Clear Resin (OCR) and the like, so as to avoid damage of molding shrinkage to the flexible display screen. The modulus of the OCA and the hardness after curing can be controlled, and wrinkles caused by stress of the OCA to the flexible display screen in the using process can be avoided.

Optionally, in an implementation manner, a layer of metal sheet 340 is disposed below the first buffer layer 310, the metal sheet 340 has a light-transmitting window thereon, and the light-transmitting window of the metal sheet 340 is located below the fingerprint detection area.

Generally, the middle frame 350 of the electronic device is a frame disposed between the display screen and the rear cover of the electronic device and used for carrying internal components of the electronic device, and the middle frame 350 has a light-transmissive window thereon, which is located below the fingerprint detection area, so that an optical signal returned from a finger above the fingerprint detection area can be transmitted to the optical fingerprint module 330 through the light-transmissive window. Since the middle frame 350 is provided with various holes and grooves for fixing other structures and components, the middle frame 350 cannot provide a whole screen support for the flexible display screen, and therefore the whole screen support for the flexible display screen can be realized through the metal sheet, such as a steel sheet.

The non-light-transmitting window area of the metal sheet is light-tight, so that the metal sheet can play a role of shading light, and can replace a foam layer below a display screen. In addition, the first buffer layer 310 covers the whole lower surface of the flexible display screen, so that the buffer function can be realized by replacing the foam layer.

The thickness of the metal sheet 340 is not limited in the embodiments of the present application, and may be, for example, less than 300 micrometers, and further, between 50 and 200 micrometers. The thickness of the metal sheet 340 in the bending region may be smaller than that in the non-bending region, so that the metal sheet 340 is convenient to bend when the flexible display screen needs to be bent.

Similarly, the respective laminated layers in the embodiments of the present application may be processed differently in the bending region and the non-bending region, for example, with different thicknesses, so as to ensure effective bending of the flexible display screen.

The metal sheet 340 may be adhered to the lower surface of the first buffer layer 310 by a second adhesive layer 341, for example.

The second adhesive layer 341 may be, for example, OCA or transparent glue.

Optionally, in one implementation, the supporter 320 covers the light-transmitting window of the metal sheet 340, and an edge of the supporter 320 is fixed to a lower surface of the metal sheet 340.

The size of the supporting member 320 is not limited in the embodiment of the present application, for example, the supporting member 320 may be slightly larger than the size of the light-transmitting window of the metal sheet 340, so as to cover the light-transmitting window. The edge of the supporter 320 may be adhered to the edge of the lower surface of the light-transmitting window of the metal sheet 340.

Optionally, in an implementation, the metal sheet 340 may be disposed on an upper surface of a middle frame 350 of the electronic device, and the support 320 is located in a light-transmitting window of the middle frame 350.

For example, as shown in fig. 4, the uppermost layer is a flexible display screen, and the lower surface of the flexible display screen is sequentially covered with a first glue layer 311, a first buffer layer 310, a second glue layer 341, a metal sheet 340, and a support member 320. The first adhesive layer 311, the first buffer layer 310, the second adhesive layer 341 and the metal sheet 340 all cover the entire lower surface of the flexible display screen. The first adhesive layer 311 is used for connecting the first buffer layer 310 and the flexible display screen. The metal sheet 340 is adhered to the lower surface of the first buffer layer 310 through the second adhesive layer 341, and the light-transmitting window of the metal sheet 340 is located below the fingerprint detection area. The edge of the supporting member 320 is adhered to the edge of the lower surface of the light-transmitting window of the metal sheet 340, so that the supporting member 320 is located below the fingerprint detection area and is used for supporting the portion of the flexible display screen located in the fingerprint detection area. And, there is a gap 321 between the support member 320 and the first buffer layer 310, and the gap 321 can avoid a water ripple phenomenon caused by deformation of the flexible display screen. The metal sheet 340 is disposed on the upper surface of the middle frame 350, and the supporting member 320 is located in the light-transmitting window of the middle frame 350. Optical fingerprint module 330 passes through fingerprint module support 331 to be fixed at the lower surface of support 320.

Optionally, in one implementation, the apparatus 300 further includes a second buffer layer 360. The second buffer layer 360 is disposed on the lower surface of the first buffer layer 310 and is located in the light-transmitting window of the metal sheet 340. Wherein the gap is a gap between the second buffer layer 360 and the supporter 320.

The second buffer layer 360 may be adhered to the lower surface of the first buffer layer 310 by the second adhesive layer 341, for example. That is, the second adhesive layer 341 covers the flexible display screen and is used to fix the metal sheet 340 and the second buffer layer 360 located in the light-transmitting window of the metal sheet 340 on the lower surface of the first buffer layer 310.

The second buffer layer 360 is disposed in the light-transmitting window of the metal sheet 340, so as to prevent the second adhesive layer 341 from being exposed. Also, considering the large thickness of the metal sheet 340, the gap between the first buffer layer 310 and the supporter 320 may be too large, for example, the gap 321 shown in fig. 4 may be too large. Therefore, the second buffer layer 360 is disposed in the light-transmitting window of the metal sheet 340, and the size of the gap 321 can be adjusted by the second buffer layer 360. By selecting a suitable thickness of the second buffer layer 360, the size of the gap between the second buffer layer 360 and the supporter 320 may be within a suitable range to solve the water ripple phenomenon generated when the flexible display screen is pressed. In addition, the upper surface of second buffer layer 360 and the upper surface parallel and level of sheetmetal 340, consequently can overcome the segment difference at the light transmission window edge on the sheetmetal, avoid the user to feel when pressing at fingerprint detection area obvious segment difference, promoted user experience.

In addition, the second buffer layer 360 may also be disposed on the upper surface of the supporter 320, and may also be used to adjust the size of the gap.

When the second buffer layer 360 is present, the gap is a gap between the second buffer layer 360 and the support 320.

The clearance is less, then can't effectively avoid the ripple phenomenon, the clearance is great, then the deformation that leads to flexible display screen when pressing is great. Therefore, the gap should have a suitable size. The size of the gap can be determined according to the characteristics and relative position relationship of each buffer layer and the support, and the size of the gap is not limited in the embodiment of the application. The size of the gap may be, for example, 0 mm to 0.3 mm. Preferably, the gap is equal or approximately equal to 0.15 mm.

The material of the second buffer layer 360 is, for example, a transparent soft material such as TPU, PI, or PET.

The second buffer layer 360 may also be a composite material layer, i.e. composed of a plurality of different material layers.

For example, as shown in fig. 5, the uppermost layer is a flexible display screen, and the lower surface of the flexible display screen is sequentially covered with a first glue layer 311, a first buffer layer 310, a second glue layer 341, a metal sheet 340, and a support member 320. The first glue layer 311 and the first buffer layer 310 both cover the entire lower surface of the flexible display screen. The first adhesive layer 311 is used for connecting the first buffer layer 310 and the flexible display screen. The lower surface of the first buffer layer 310 covers the second adhesive layer 341. The metal sheet 340 is adhered to the lower surface of the first buffer layer 310 through the second adhesive layer 341, and the light-transmitting window of the metal sheet 340 is located below the fingerprint detection area. A second buffer layer 360 is added in the light-transmitting window of the metal sheet 340, and the second buffer layer 360 is fixed on the lower surface of the first buffer layer 310 through a second adhesive layer 341. The upper surface of the second buffer layer 360 is aligned with the upper surface of the metal sheet 340.

The edge of the supporting member 320 is adhered to the edge of the lower surface of the light-transmitting window of the metal sheet 340, so that the supporting member 320 is located below the fingerprint detection area and is used for supporting the portion of the flexible display screen located in the fingerprint detection area. And, there is a gap 321 between the support member 320 and the second buffer layer 360, and the gap 321 can avoid a water ripple phenomenon caused by deformation of the flexible display screen. The metal sheet 340 is disposed on the upper surface of the middle frame 350, and the supporting member 320 is located in the light-transmitting window of the middle frame 350. Optical fingerprint module 330 passes through fingerprint module support 331 to be fixed at the lower surface of support 320.

Therefore, with the solution shown in fig. 5, the supporting member 320 can support the flexible display screen during fingerprint detection, so as to prevent the flexible display screen from sinking due to finger pressing. The first buffer layer 310 and the second buffer layer 360 may play a role of buffering and reinforcing the flexible display screen. Through the adjustment the thickness of second buffer layer 360 guarantees to have the suitable clearance of size between second buffer layer 360 and the support piece 320 to the water ripple phenomenon that produces when avoiding pressing flexible display screen. Meanwhile, the second buffer layer 360 is located in the light transmission window of the metal sheet 340, and the heights of the upper surfaces of the second buffer layer 360 and the metal sheet 340 are the same, so that the segment difference at the edge of the light transmission window of the metal sheet 340 is filled, and the user experience is improved.

Mode 2

The first buffer layer 310 is arranged on the lower surface of the flexible display screen and is positioned in the light-transmitting window of the first foam layer 371 on the lower surface of the flexible display screen.

For example, the first buffer layer 310 is adhered to the lower surface of the flexible display screen by a first adhesive layer 311 and is accommodated in the light-transmitting window of the first foam layer 371. The first glue layer 311 may be, for example, OCA or transparent glue.

The lower surface of flexible display screen covers has the cotton layer of bubble usually for realize functions such as shading, heat dissipation, buffering. The flexible display screen lower surface covers have light-transmitting window on the cotton layer 371 of first bubble, light-transmitting window is located fingerprint detection area's below is used for the transmission the light signal that the finger of fingerprint detection area top returned.

The thickness of the first foam layer may be, for example, between 0 and 0.2 mm, preferably equal or approximately equal to 0.1 mm.

Optionally, in an implementation manner, the lower surface of the first foam layer 371 is further provided with a second foam 372. Wherein, the light transmission window of the cotton layer 372 of second bubble is located the below of the light transmission window of the cotton layer 371 of first bubble and is less than the light transmission window of the cotton layer 371 of first bubble, with the light transmission window of the cotton layer 371 of first bubble with the edge of the light transmission window of the cotton layer 372 of second bubble forms the step, wherein, first buffer layer 320 sets up on the step.

For example, as shown in fig. 7, the lower surface of the first foam layer 371 is provided with a second foam layer 372. Wherein, the light transmission window of the second foam layer 372 is smaller than the light transmission window of the first foam layer 371, so that steps are formed at the edges of the light transmission windows of the first foam layer 371 and the second foam layer 372. The first buffer layer 310 is located in the light transmission window of the first foam layer 371, the upper surface of the first buffer layer 310 is used for adhering the flexible display screen, and the edge of the first buffer layer 310 is fixed on the step.

With the arrangement shown in fig. 7, first foam layer 371, second foam layer 372, and first cushioning layer 310 may be provided to the panel plant as a single unit, as a single unit. Here, 381 and 382 shown in fig. 7 are an upper separation film and a lower separation film, respectively. When first bubble cotton layer 371, second bubble cotton layer 372 and first buffer layer 310 are as a whole, can paste between its lower surface with the display screen after tearing off separation and reunion membrane 381, can paste between its structure rather than the below after tearing off separation and reunion membrane 382 to the assembly of the laminated structure under the messenger flexible display screen is more convenient.

Optionally, in an implementation manner, a layer of metal sheet 340 is disposed below the second foam layer 372, a light-transmitting window is disposed on the metal sheet 340, and the light-transmitting window of the metal sheet 340 is located below the fingerprint detection area.

The metal sheet 340 may be adhered to the lower surface of the second foam layer 372. At this time, the metal sheet 340 can be adhered to the lower surface of the second foam layer 372 by removing the lower clutch film 382 shown in fig. 7.

Here, the upper clutch diaphragm 381 shown in fig. 7 may be a light clutch diaphragm and the lower clutch diaphragm 382 may be a heavy clutch diaphragm, or the upper clutch diaphragm 381 may be a heavy clutch diaphragm and the lower clutch diaphragm 382 may be a light clutch diaphragm. The heavy clutch film and the light clutch film may be used to determine the order of the upper and lower sides. For example, the separation film 382 may be peeled off to adhere the second foam layer 372 and the metal sheet 340, and the upper separation film 381 may be peeled off to adhere the first buffer layer 310 and the first foam layer 371 to the lower surface of the flexible display screen.

The supporter 320 may be slightly larger than the size of the light transmission window of the metal sheet 340 so as to cover the light transmission window, and an edge of the supporter 320 may be adhered to an edge of a lower surface of the light transmission window of the metal sheet 340.

Optionally, in an implementation manner, the metal sheet 340 is disposed on an upper surface of a middle frame 350 of the electronic device, and the support 320 is located in a light-transmitting window of the middle frame 350.

For example, as shown in fig. 8 and 9, the uppermost layer is a flexible display screen, a first foam layer 371 and a second foam layer 371 are sequentially disposed on the lower surface of the flexible display screen, the upper surface of the first buffer layer 310 is the lower surface of the display screen pasted by the first glue layer 311, and the first buffer layer 310 is located in the light-transmitting window of the first foam layer 371, so as to play a role in buffering and reinforcing the flexible display screen. Because the light transmission window of the second foam layer 372 is smaller than the light transmission window of the first foam layer 371, a step is formed at the edge of the light transmission window of the first foam layer 371 and the second foam layer 372, and the first buffer layer 310 is located on the step. In this way, the fixation of the first buffer layer 310 can be achieved, thereby better integrating the first foam layer 371, the second foam layer 371, and the first buffer layer 310 as a whole as shown in fig. 7 for subsequent assembly.

In fig. 8 and 9, a metal sheet 340 is further disposed between the second foam layer 372 and the middle frame 350. The metal sheet 340 is adhered to the lower surface of the second foam layer 372, and the light-transmitting window of the metal sheet 340 is located below the fingerprint detection area. The middle frame is adhered to the lower surface of the metal sheet 340 through the glue layer 351. The edge of the supporting member 320 is adhered to the edge of the lower surface of the light-transmitting window of the metal sheet 340 through the adhesive layer 351 and is positioned in the light-transmitting window of the middle frame 350, so as to support the part of the flexible display screen positioned in the fingerprint detection area and prevent the flexible display screen from sinking due to finger pressing. Optical fingerprint module 330 passes through fingerprint module support 331 to be fixed at the lower surface of support 320.

Optionally, in an implementation manner, the apparatus 300 further includes a second buffer layer 360, and the second buffer layer 360 is disposed on the upper surface of the support 320 and is located in the light-transmitting window of the metal sheet 340.

The gap is a gap between the second buffer layer 360 and the supporting member 340.

The second buffer layer 360 may be adhered to the upper surface of the supporting member 320 by, for example, OCA or transparent glue.

The gap between the second buffer layer 360 and the first buffer layer 310 is small, so that the water ripple phenomenon cannot be effectively avoided, and the deformation of the flexible display screen is large when the flexible display screen is pressed due to the large gap. Considering that the thickness of the metal sheet 340 is large, the gap between the first buffer layer 310 and the supporter 320 may be excessively large. Therefore, the second buffer layer 360 is disposed in the light-transmitting window of the metal sheet 340, so that the size of the gap is adjusted by the second buffer layer 360. By selecting a suitable thickness of the second buffer layer 360, the size of the gap between the second buffer layer 360 and the supporter 320 may be within a suitable range to solve the water ripple phenomenon generated when the flexible display screen is pressed.

The size of the gap may be, for example, 0 mm to 0.3 mm. Preferably, the gap is equal or approximately equal to 0.15 mm.

The thickness of the second buffer layer 360 is not limited in this embodiment. For example, the thickness of the second buffer layer 360 may be the same as the thickness of the metal sheet 340. Thus, when the second buffer layer 360 is disposed on the support of the lower surface of the metal sheet 340, the upper surface of the second buffer layer 360 may be the same height as the upper surface of the metal sheet 340.

When the upper surface of second buffer layer 360 and the upper surface of sheetmetal 340 were aligned, can overcome the segment difference at the light transmission window edge on the sheetmetal, avoided the user to feel when pressing at fingerprint detection area obvious segment difference, promoted user experience.

For example, in fig. 8 and 9, the second buffer layer 360 is adhered to the upper surface of the supporting member 320 by a glue layer 361 and is located in the light-transmitting window of the metal sheet 340. Wherein, a gap 321 exists between the second buffer layer 360 and the first buffer layer 310. When the thickness of the second buffer layer 360 is equal to that of the metal sheet 340, the thickness of the gap 321 is equal to that of the second foam layer 372, and is preferably equal to or approximately equal to 1.5 mm. The gap 321 can avoid the water ripple phenomenon caused by the deformation of the flexible display screen when the finger presses.

It should be understood that when the length of the second buffer layer 360 is equal to the size of the light-transmitting window of the metal sheet 340, the glue layer 351 between the metal sheet 340 and the middle frame 350 and the glue layer 361 between the second buffer layer 360 and the support 320 may be the same glue layer, for example, a large-area OCA glue layer, which covers the upper surfaces of the middle frame 350 and the support 320 and covers the lower surfaces of the metal sheet 340 and the second buffer layer 360.

It can be seen that, with the solutions shown in fig. 8 and 9, the supporting member 320 can support the flexible display screen during fingerprint detection, so as to prevent the flexible display screen from sinking due to finger pressing. The first buffer layer 310 and the second buffer layer 360 may play a role of buffering and reinforcing the flexible display screen. Through the adjustment the thickness of second buffer layer 360 guarantees to have the suitable clearance of size between second buffer layer 360 and the first buffer layer 310 to the water ripple phenomenon that produces when avoiding pressing flexible display screen. Meanwhile, the second buffer layer 360 is located in the light transmission window of the metal sheet 340, and the heights of the upper surfaces of the second buffer layer 360 and the metal sheet 340 are the same, so that the segment difference at the edge of the light transmission window of the metal sheet 340 is filled, and the user experience is improved.

In the embodiment of the application, the foam and the glue layers on the upper and lower surfaces of the foam are collectively referred to as a foam layer.

The embodiment of the present application does not limit the fixing manner of the optical fingerprint module 330.

For example, the optical fingerprint module 330 may be disposed on a lower surface of the supporting member 320, such as shown in fig. 4, 5, 8 and 9, and adhered to the lower surface of the supporting member 320.

For another example, the optical fingerprint module 330 may also be disposed on the middle frame 350, for example, adhered to the lower surface of the middle frame 350.

The fixing manner of the supporting member 320 is not limited in any way in the embodiments of the present application. The supporting member 320 may be adhered to the lower surface of the metal sheet 340, for example, as shown in fig. 4, 5, 8 and 9, and directly adhered to the edge of the lower surface of the light-transmitting window of the metal sheet 340; alternatively, further, for example, as shown in fig. 6, a step may be formed on the middle frame 350, and the supporter 320 may be fixed by the step.

In the embodiment of the present application, when the method 1 is adopted, that is, the large-area first buffer layer 310 and the large-area metal sheet 340 are provided, the original foam layer in the display screen may be omitted, the first buffer layer 310 realizes the buffering and heat dissipation functions of the foam layer, and the metal sheet 340 realizes the light blocking function of the foam layer.

The embodiment of the application also provides electronic equipment, which comprises a flexible display screen and the fingerprint identification device in the various embodiments of the application.

Optionally, the electronic device further comprises a metal sheet.

Optionally, the electronic device further comprises a middle frame.

By way of example and not limitation, the electronic device in the embodiments of the present application 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, an in-vehicle electronic device, or a wearable smart 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 function, for example: smart watches or smart glasses and the like, and only focus on a certain type of application function, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets for physical sign monitoring, smart jewelry and other devices.

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.

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. An apparatus for fingerprint identification, applied to an electronic device having a flexible display screen, wherein a fingerprint detection area of the apparatus is located in a display area of the flexible display screen, the apparatus comprising:

the first buffer layer covers the lower surface of the flexible display screen;

2. The device of claim 1, wherein the first cushioning layer is bonded to the lower surface of the flexible display screen by a first layer of adhesive.

3. The device of claim 2, wherein the first glue layer is an optical adhesive OCA glue.

4. The device of claim 1, wherein the material of the first cushioning layer is polyurethane TPU, polyimide PI, or polyester PET.

5. The device of claim 1, wherein a metal sheet is disposed below the first buffer layer, the metal sheet having a light transmissive window thereon, the light transmissive window of the metal sheet being located below the fingerprint detection area.

6. The device of claim 5, wherein the metal sheet is adhered to the lower surface of the first cushioning layer by a second layer of adhesive.

7. The device of claim 6, wherein the second layer of glue is OCA glue.

8. The device of claim 5, wherein the support covers the light-transmissive window of the metal sheet, and an edge of the support is fixed to a lower surface of the metal sheet.

9. The apparatus of claim 8, wherein the metal sheet is disposed on an upper surface of a middle frame of the electronic device, and the supporting member is located in a light-transmissive window of the middle frame.

10. The apparatus of any one of claims 5 to 9, further comprising:

the second buffer layer is arranged on the lower surface of the first buffer layer and is positioned in the light transmission window of the metal sheet, wherein the gap is a gap between the second buffer layer and the support piece.

11. The apparatus of claim 10, wherein an upper surface of the second buffer layer is at the same height as an upper surface of the metal sheet.

12. The device of claim 10, wherein the gap is 0.15 millimeters.

13. The device of claim 10, wherein the second cushioning layer is attached to the lower surface of the first cushioning layer by a second layer of adhesive.

14. The device of claim 10, wherein the material of the second cushioning layer is TPU, PI, or PET.

15. The device according to any one of claims 1 to 9, wherein the material of the support is optical glass or resin.

16. The device of any one of claims 1 to 9, wherein the optical fingerprint module is disposed on a lower surface of the support.

17. The apparatus according to any one of claims 1 to 9, wherein the optical fingerprint module is disposed on a middle frame of the electronic device.

18. An apparatus for fingerprint identification, applied to an electronic device having a flexible display screen, wherein a fingerprint detection area of the apparatus is located in a display area of the flexible display screen, the apparatus comprising:

19. The device of claim 18, wherein the first buffer layer is attached to the lower surface of the flexible display screen by OCA glue.

20. The device of claim 18, wherein the material of the first cushioning layer is polyurethane TPU, polyimide PI, or polyester PET.

21. The device of claim 18, wherein the first foam layer has a thickness of 0.1 mm.

22. The device of claim 18, wherein the lower surface of the first foam layer is further provided with a second foam layer, and the light transmission window of the second foam layer is located below and smaller than the light transmission window of the first foam layer to form a step at the edge of the light transmission window of the first foam layer and the light transmission window of the second foam layer, wherein the first buffer layer is disposed on the step.

23. The device of claim 22, wherein the second foam layer has a thickness of 0.15 millimeters.

24. The device of claim 22, wherein a metal sheet is disposed below the second foam layer, the metal sheet having a light transmissive window thereon, the light transmissive window of the metal sheet being located below the fingerprint detection area.

25. The apparatus of claim 24, wherein the support member covers the light transmissive window of the metal sheet, and an edge of the support member is fixed to a lower surface of the metal sheet.

26. The apparatus of claim 25, wherein the metal sheet is disposed on an upper surface of a middle frame of the electronic device, and the supporting member is located in a light-transmissive window of the middle frame.

27. The apparatus of any one of claims 24 to 26, further comprising:

the second buffer layer is arranged on the upper surface of the support piece and is positioned in the light transmission window of the metal sheet, wherein the gap is a gap between the second buffer layer and the support piece.

28. The apparatus of claim 27, wherein an upper surface of the second buffer layer is at the same height as an upper surface of the metal sheet.

29. The device of claim 27, wherein the gap is 0.15 millimeters.

30. The device of claim 27, wherein the second cushioning layer is attached to the upper surface of the support member by OCA glue.

31. The device of claim 27, wherein the material of the second cushioning layer is TPU, PI, or PET.

32. The device of any one of claims 18 to 26, wherein the material of the support is optical glass or resin.

33. The apparatus of any one of claims 18 to 26, wherein the optical fingerprint module is disposed on a lower surface of the support.

34. The apparatus according to any one of claims 18 to 26, wherein the optical fingerprint module is disposed on a center frame of the electronic device.

35. An electronic device, characterized in that the electronic device comprises:

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

the apparatus for fingerprint recognition according to any one of claims 1 to 34.