WO2020191596A1 - 指纹识别装置和电子设备 - Google Patents

指纹识别装置和电子设备 Download PDF

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Publication number
WO2020191596A1
WO2020191596A1 PCT/CN2019/079587 CN2019079587W WO2020191596A1 WO 2020191596 A1 WO2020191596 A1 WO 2020191596A1 CN 2019079587 W CN2019079587 W CN 2019079587W WO 2020191596 A1 WO2020191596 A1 WO 2020191596A1
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WO
WIPO (PCT)
Prior art keywords
display screen
flexible display
fingerprint
opening
identification device
Prior art date
Application number
PCT/CN2019/079587
Other languages
English (en)
French (fr)
Inventor
曾利忠
杜灿鸿
Original Assignee
深圳市汇顶科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市汇顶科技股份有限公司 filed Critical 深圳市汇顶科技股份有限公司
Priority to PCT/CN2019/079587 priority Critical patent/WO2020191596A1/zh
Priority to CN201980000516.7A priority patent/CN110114779B/zh
Publication of WO2020191596A1 publication Critical patent/WO2020191596A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED

Definitions

  • the embodiments of the present application relate to the field of fingerprint identification technology, and more specifically, to fingerprint identification devices and electronic equipment.
  • a fingerprint identification device and electronic equipment are provided, which can realize under-screen fingerprint identification of a flexible display screen.
  • a fingerprint identification device which is applied to an electronic device with a flexible display screen, including:
  • the buffer structure is arranged under the flexible display screen
  • the optical fingerprint module is arranged under the supporting member,
  • the fingerprint detection signal returned by the reflection or scattering of the human finger above the flexible display screen is received by the optical fingerprint module after passing through the buffer structure and the support, and the fingerprint detection signal is used to detect Describe the fingerprint information of the finger.
  • the middle frame is formed with an opening
  • a step structure is formed at the edge of the first side of the opening
  • the support member is configured to be disposed on the step structure
  • the opening The first side of the hole is the side close to the flexible display screen.
  • an inverted step structure is formed at the edge of the second side of the opening, and the optical fingerprint module is at least partially disposed in the inverted step structure.
  • the middle frame is formed with an opening
  • an inverted step structure is formed at the edge of the second side of the opening
  • the support member is configured to be arranged in the opening
  • a raised portion is formed on the upper surface of the support, the stepped surfaces on both sides of the raised portion of the support are fixed to the stepped surface of the inverted step structure, and the second side of the opening is away from the flexible display Side of the screen.
  • the optical fingerprint module is disposed on a second side of the opening, and the second side of the opening is a side away from the flexible display screen.
  • the support is made of a light-transmitting material, and the transmittance of the light-transmitting material to a light signal is greater than a first threshold.
  • an opening is provided on the supporting member for detecting a signal through the fingerprint.
  • the buffer structure includes a first adhesive layer, and the first adhesive layer is used to connect the flexible display screen and the support.
  • the first adhesive layer is disposed in all areas under the flexible display screen.
  • the buffer structure includes a flexible buffer layer, which is disposed between the flexible display screen and the support.
  • the flexible buffer layer is made of a light-transmitting material, and the transmittance of the light-transmitting material to a light signal is greater than a second threshold.
  • an opening is provided on the flexible buffer layer for detecting a signal through the fingerprint.
  • the buffer structure further includes at least one of the following:
  • the first adhesive layer is used to connect the flexible display screen and the flexible buffer layer;
  • the second adhesive layer is used to connect the flexible buffer layer and the support.
  • the first adhesive layer is provided in the entire area under the flexible display screen, or is provided in a partial area under the flexible display screen, and in the opening of the middle frame.
  • the projection of the second adhesive layer on the flexible display screen covers the entire area of the flexible display screen, or the projection of the second adhesive layer on the flexible display screen covers A partial area of the flexible display screen, and the second adhesive layer is arranged in the opening of the middle frame.
  • the first adhesive layer is made of a light-transmitting material, and the transmittance of the light-transmitting material to a light signal is greater than a third threshold.
  • the second adhesive layer is made of a light-transmitting material, and the light-transmitting material has a transmittance of light signals greater than a fourth threshold.
  • the projection of the flexible buffer layer on the flexible display screen covers the entire area of the flexible display screen, or the projection of the flexible buffer layer on the flexible display screen covers the flexible display A partial area of the screen, and the flexible buffer layer is arranged in the opening of the middle frame.
  • the fingerprint identification device further includes:
  • the third adhesive layer is used to fix the support on the middle frame.
  • the flexible display screen includes a bending area and a non-bending area, and the device is disposed in the non-bending area of the flexible display screen.
  • the optical fingerprint module includes an optical component and an optical fingerprint sensor, wherein the optical component is used to guide or converge fingerprint detection signals to the optical sensor, and the optical sensor is used for The corresponding fingerprint information is detected according to the fingerprint detection signal.
  • the optical component is a lens or a collimator.
  • an electronic device including:
  • the middle frame is used to support the support in the device, wherein the support is used to support the flexible display screen.
  • the middle frame is formed with an opening
  • a step structure is formed at the edge of the first side of the opening
  • the support member is configured to be disposed on the step structure
  • the opening The first side of the hole is the side close to the support.
  • an inverted step structure is formed at the edge of the second side of the opening, and the optical fingerprint module is configured to be disposed in the inverted step structure, and the second side of the opening Is the side close to the optical fingerprint module.
  • the flexible display screen includes a bending area and a non-bending area, and the device is disposed in the non-bending area of the flexible display screen.
  • the support can provide support for the flexible display, and the support does not directly contact the flexible display , Can avoid damage to the flexible display screen, and at the same time, the flexible buffer layer and the flexible support have a light-transmitting effect.
  • the fingerprint detection signal returned by the reflection or scattering of the human finger above the flexible display screen can pass through the flexible buffer layer And the support are received by the optical fingerprint module for obtaining fingerprint information of the user's finger.
  • Fig. 1 is a directional view of an electronic device according to an embodiment of the present application.
  • Fig. 2 is a directional view of an electronic device according to another embodiment of the present application.
  • Fig. 3 is a schematic diagram of a partial cross-sectional structure of the electronic device shown in Figs. 1 and 2 along A-A'.
  • Fig. 4 is a schematic block diagram of a fingerprint identification device according to an embodiment of the present application.
  • Fig. 5 is a schematic structural diagram of a fingerprint identification device according to an embodiment of the present application.
  • Fig. 6 is a schematic structural diagram of a fingerprint identification device according to another embodiment of the present application.
  • Fig. 7 is a schematic structural diagram of a fingerprint identification device according to still another embodiment of the present application.
  • Fig. 8 is a schematic diagram of an opening method on the middle frame according to an embodiment of the present application.
  • Fig. 9 is a schematic diagram of another way of opening holes on the middle frame according to an embodiment of the present application.
  • Fig. 10 is a schematic diagram of a lens-based fingerprint identification device.
  • Fig. 11 is a schematic diagram of a fingerprint identification device based on a collimator.
  • Fig. 12 is a schematic diagram of a fingerprint identification device based on a microlens array.
  • Fig. 13 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
  • the fingerprint identification device provided in the embodiments of this application can be applied to smart phones, tablet computers, and other mobile terminals with flexible display screens or other terminal equipment; more specifically, in the above-mentioned terminal equipment, fingerprint
  • the identification device may specifically be an optical fingerprint device, which may be arranged in a partial area or the entire area below the display screen, thereby forming an under-display optical fingerprint system.
  • Figures 1, 2 and 3 show schematic diagrams of electronic devices to which the embodiments of the present application can be applied.
  • Figure 1 and Figure 2 are schematic diagrams of the orientation of the electronic device 10
  • Figure 3 is the electronic device shown in Figures 1 and 2 The partial cross-sectional structure diagram of the device 10 along A'-A'.
  • the electronic device 10 includes a display screen 120 and an optical fingerprint device 130, wherein the optical fingerprint device 130 is arranged in a partial area below the display screen 120, for example, the middle area of the display screen.
  • the optical fingerprint device 130 includes an optical fingerprint sensor, and the optical fingerprint sensor includes a sensing array with a plurality of optical sensing units, and the area where the sensing array is located or the sensing area thereof is the fingerprint detection area 103 of the optical fingerprint device 130. As shown in FIG. 1, the fingerprint detection area 103 is located in the display area of the display screen 120.
  • the area of the fingerprint detection area 103 may be different from the area of the sensing array of the optical fingerprint device 130, for example, through optical path design such as lens imaging, reflective folding optical path design, or other optical path design such as light convergence or reflection, etc.
  • the area of the fingerprint detection area 103 of the optical fingerprint device 130 can be made larger than the area of the sensing array of the optical fingerprint device 130.
  • the fingerprint detection area 103 of the optical fingerprint device 130 may also be designed to be substantially the same as the area of the sensing array of the optical fingerprint device 130.
  • the electronic device 10 adopting the above structure does not need to reserve space on the front side for setting fingerprint buttons (such as the Home button), so that a full screen solution can be adopted, that is, the display area of the display screen 120 It can be basically extended to the front of the entire electronic device 10.
  • the optical fingerprint device 130 includes a light detecting part 134 and an optical component 132, and the light detecting part 134 includes the sensor array and is electrically connected to the sensor array.
  • the connected reading circuit and other auxiliary circuits 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 is specifically a photodetector (Photodetector) array, which includes A plurality of photodetectors distributed in an array, the photodetector can be used as the optical sensing unit as described above; the optical component 132 can be arranged above the sensing array of the photodetecting part 134, which can specifically include A filter, a light guide layer or a light path guide structure and other optical elements.
  • the filter layer can be used to filter out ambient light penetrating the finger, for example, infrared light that interferes with imaging, and the light guide layer Or the optical path guiding structure is mainly used to guide the reflected light reflected from the finger surface to the sensing array for optical detection.
  • the optical assembly 132 and the light detecting part 134 may be packaged in the same optical fingerprint component.
  • the optical component 132 and the optical detection part 134 can be packaged in the same optical fingerprint chip, or the optical component 132 can be arranged outside the chip where the optical detection part 134 is located, for example, the optical component 132 is attached above the chip, or some components of the optical assembly 132 are integrated into the chip.
  • the light guide layer or light path guiding structure of the optical component 132 has multiple implementation schemes.
  • the light guide layer may specifically be a collimator layer made on a semiconductor silicon wafer, which has multiple A collimating unit or a micro-hole array.
  • the collimating unit can be specifically a small hole.
  • the reflected light reflected from the finger the light that is perpendicularly incident on the collimating unit can pass through and be passed by the optical sensing unit below it.
  • the light with an excessively large incident angle is attenuated by multiple reflections inside the collimating unit. Therefore, each optical sensing unit can basically only receive the reflected light reflected by the fingerprint pattern directly above it.
  • the sensor array can detect the fingerprint image of the finger.
  • the light guide layer or the light path guide 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, which The sensing array used to converge the reflected light reflected from the finger to the light detection part 134 below it, so that the sensing array can perform imaging based on the reflected light, thereby obtaining a fingerprint image of the finger.
  • the optical lens layer may further have a pinhole formed in the optical path of the lens unit, and the pinhole may cooperate with the optical lens layer to expand the field of view of the optical fingerprint device to improve the optical The fingerprint imaging effect of the fingerprint device 130.
  • the light guide layer or the light path guide 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 can be grown by semiconductors.
  • a process or other processes are formed above the sensing array of the light detecting part 134, and each microlens may correspond to one of the sensing units of the sensing array.
  • other optical film layers may be formed between the microlens layer and the sensing unit, such as a dielectric layer or a passivation layer.
  • the microlens layer and the sensing unit may also include The light-blocking layer of the micro-hole, wherein the micro-hole is formed between the corresponding micro-lens and the sensing unit, the light-blocking layer can block the optical interference between the adjacent micro-lens and the sensing unit, and make the sensing
  • the light corresponding to the unit is condensed into the microhole through the microlens and is transmitted to the sensing unit through the microhole to perform optical fingerprint imaging.
  • a microlens layer can be further provided under the collimator layer or the optical lens layer.
  • the collimator layer or the optical lens layer is used in combination with the micro lens layer, its specific laminated structure or optical path may need to be adjusted according to actual needs.
  • the display screen 120 may be a display screen with a self-luminous display unit, such as an organic light-emitting diode (Organic Light-Emitting Diode, OLED) display or a micro-LED (Micro-LED) display Screen.
  • OLED Organic Light-Emitting Diode
  • the optical fingerprint device 130 may use the display unit (ie, an OLED light source) of the OLED display screen 120 located in the fingerprint detection area 103 as an excitation light source for optical fingerprint detection.
  • the display screen 120 emits a beam of light to the target finger above the fingerprint detection area 103. The light is reflected on the surface of the finger to form reflected light or is scattered inside the finger.
  • the above-mentioned reflected light and scattered light are collectively referred to as reflected light. Because the ridge and valley of the fingerprint have different light reflection capabilities, the reflected light from the fingerprint ridge and the emitted light from the fingerprint ridge have different light intensities. After the reflected light passes through the optical components, it is optically fingerprinted.
  • the sensing array in the device 130 receives and converts into a corresponding electrical signal, that is, a fingerprint detection signal; based on the fingerprint detection signal, fingerprint image data can be obtained, and fingerprint matching verification can be further performed, thereby implementing the electronic device 10 Optical fingerprint recognition function.
  • the optical fingerprint device 130 may also use a built-in light source or an external light source to provide an optical signal for fingerprint detection.
  • the electronic device 10 further includes a transparent protective cover, which is located above the display screen 120 and covers the front surface of the electronic device 10. Because, in the embodiment of the present application, the so-called finger pressing on the display screen 120 actually refers to pressing on the cover plate above the display screen 120 or covering the surface of the protective layer of the cover plate.
  • the optical fingerprint device 130 may include only one optical fingerprint sensor.
  • the fingerprint detection area 103 of the optical fingerprint device 130 has a small area and a fixed position, so the user is performing fingerprint input At this time, it is necessary to press the finger to a specific position of the fingerprint detection area 103, otherwise the optical fingerprint device 130 may not be able to collect fingerprint images, resulting in poor user experience.
  • the optical fingerprint device 130 may specifically include multiple optical fingerprint sensors; the multiple optical fingerprint sensors may be arranged side by side in the middle area of the display screen 120 by splicing, and the multiple The sensing area of the optical fingerprint sensor together constitutes the fingerprint detection area 103 of the optical fingerprint device 130.
  • the fingerprint detection area 103 of the optical fingerprint device 130 may include multiple sub-areas, and each sub-area corresponds to the sensing area of one of the optical fingerprint sensors, so that the fingerprint collection area 103 of the optical fingerprint device 130 can be It extends to the main area of the middle part of the display screen, that is, extends to the area where the finger is habitually pressed, so as to realize the blind fingerprint input operation.
  • the fingerprint detection area 130 can also be extended to half of the display area or even the entire display area, thereby realizing half-screen or full-screen fingerprint detection.
  • the optical fingerprint device 130 may further include a circuit board for transmitting signals (such as the fingerprint detection signal).
  • the circuit board may be a flexible printed circuit board (Flexible Printed Circuit Board). Circuit, FPC).
  • the optical fingerprint sensor can be connected to the FPC, and through the FPC, electrical interconnection and signal transmission with other peripheral circuits or other elements in the electronic device are realized.
  • the optical fingerprint sensor may receive the control signal of the processing unit of the electronic device through the FPC, and may also output a fingerprint detection signal (for example, a fingerprint image) to the processing unit of the electronic device through the FPC or Control unit, etc.
  • the display screen 120 is a flexible display screen, or foldable display screen.
  • the display screen 120 may be made of flexible materials such as plastic or metal.
  • the cover plate on the display screen 120 may also be a flexible material, so that after the display screen is finished, it can still be bent and deformed.
  • the direction can be divided into the outward-turning type, as shown in Figure 1, that is, the display area of the display screen is on the outside of the display screen, and the inward-turning type, as shown in Figure 2, that is, the display area of the display screen is on the inside of the display screen.
  • the cover When the cover is made of flexible material, the cover cannot provide support for the display screen. In this case, when the user presses the fingerprint detection area on the display screen for fingerprint recognition, the display screen deforms greatly, which affects the fingerprint recognition performance.
  • the present application provides a fingerprint recognition solution, which can ensure fingerprint recognition performance without affecting the folding and display performance of the display screen.
  • the fingerprint identification device 20 may include:
  • the buffer structure 220 is arranged under the flexible display screen 210;
  • the support 230 is disposed under the buffer structure 220, the support is used to be disposed on the middle frame 260 of the electronic device, and the support is used to support the flexible display 220;
  • the optical fingerprint module 240 is disposed under the support 230, wherein the optical fingerprint module 240 is used to receive fingerprint detection signals returned by the reflection or scattering of a human finger above the flexible display 210, wherein The fingerprint detection signal is used to detect fingerprint information of the finger.
  • the display screen 210 may be the display screen 120 shown in FIGS. 1 to 3, and for related descriptions, reference may be made to the foregoing description of the display screen 120. For simplicity, here No longer.
  • the flexible display 210 may have a bending area (such as the bending area 122 shown in FIG. 1 or FIG. 2) and a non-bending area (such as the non-bending area shown in FIG. 1 or FIG. 2). Bending area 121).
  • the optical fingerprint module 240 may correspond to the optical fingerprint device 130 in the above-mentioned embodiments.
  • the optical fingerprint device 130 please refer to the foregoing description of the optical fingerprint device 130.
  • the optical fingerprint module 240 may be disposed in the non-bending area of the flexible display 210 to avoid damage to the optical fingerprint module when the flexible display is bent, which affects fingerprint recognition performance .
  • the supporting member 230 may be used to support the flexible display screen 210, and the supporting member 230 may be disposed on the middle frame 260 of the electronic device. In this way, the middle frame 260 can provide the supporting member 230 with a supporting function. Ground, the supporting member 230 can provide supporting force to the flexible display screen 210. In addition, in the embodiment of the present application, the supporting member 230 may also be used to transmit the fingerprint detection signal for fingerprint detection.
  • the support 230 may be made of a light-transmitting material, for example, transparent glass, acrylic and other materials.
  • the light-transmitting material has a higher transmittance to the optical signal than the second The threshold, for example, 80%, or 90%, etc.
  • an opening may be provided in the supporting member 230, and the opening may be used to transmit the fingerprint detection signal.
  • the supporting member 230 may not use light-transmitting materials. As long as the opening in the support 230 can transmit enough fingerprint detection signals.
  • the fingerprint identification device 20 further includes:
  • the third adhesive layer 236 is used to fix the support 230 on the middle frame 260 of the electronic device.
  • the third adhesive layer may be an adhesive material, for example, a double-sided adhesive.
  • the support member may also be fixed to the middle frame by other fixed connection methods, for example, glue fixation, welding fixation, screw fixation, or coupling fixation.
  • glue fixation glue fixation, welding fixation, screw fixation, or coupling fixation.
  • welding fixation welding fixation
  • screw fixation screw fixation
  • coupling fixation any fixed connection methods
  • an opening 250 is formed on the middle frame, the first side of the opening 250 is used to support the support, and the opening 250 is also used to connect the The fingerprint detection signal is transmitted to the optical fingerprint module 240, and the optical fingerprint module 240 is arranged on the second side of the opening, wherein the first side of the opening is close to the flexible display 210 On one side, the second side of the opening is the side away from the flexible display screen 210.
  • a step structure is formed at the edge of the first side
  • the supporting member 230 is used to be disposed on the step structure
  • an inverted step structure is formed at the edge of the second side of the opening 250
  • the module 240 is configured to be arranged in the inverted step structure, wherein the second side of the opening is the side away from the flexible display 210.
  • FIG. 8 is a schematic diagram of an opening method
  • a step structure 261 is formed on the first side of the opening
  • the support 230 may be disposed on the step structure 260
  • the second side of the opening is formed with
  • the optical fingerprint module 240 is at least partially disposed in the space formed by the inverted step structure 262.
  • an inverted step structure 262 is formed at the edge of the lower surface of the opening 250, the support 230 is a step structure, and the step surface of the support 230 is bonded to The step surface of the inverted step structure 262 is shown in FIG. 9.
  • the size of the opening on the first side is larger than the size of the opening on the second side, so that the support member is supported by a step structure at the opening on the first side, At the same time, it can ensure that the required light is transmitted for imaging, while ensuring that the unwanted light can be blocked.
  • the buffer structure 220 can buffer the flexible display screen 210. Specifically, the buffer structure 220 can absorb the stress received by the flexible display screen 210, thereby protecting the screen. At the same time, it can also prevent the support 230 from directly contacting the flexible display screen 210 and damage the flexible display screen 210. In addition, the buffer structure 220 may also be used to transmit the fingerprint detection signal for fingerprint detection.
  • the buffer structure 220 when the buffer structure 220 is disposed in the bending area of the flexible display screen 210, the buffer structure 220 may be a foldable flexible material.
  • the buffer structure 220 includes a first adhesive layer 221, and the first adhesive layer 221 can buffer the flexible display screen 210, and The first adhesive layer 221 may also be used to connect the flexible display 210 and the support 230, as shown in FIG. 5.
  • the first adhesive layer 221 may be provided in the entire area under the flexible display screen, that is, the first adhesive layer 212 may also extend to the entire flexible display screen 210, in this case Therefore, it is not necessary to provide foam between the flexible display screen 210 and the middle frame 260, and the first adhesive layer 221 can be used as a foam.
  • the first adhesive layer 221 can be made of a material with an adhesive effect, and the first adhesive layer can also be used to transmit optical signals.
  • the first adhesive layer 221 can be made of light-transmissive and adhesive materials, such as transparent glue.
  • optical glue Optically Clear Adhesive, OCA
  • soft silicone optionally, the first adhesive layer 221
  • the light transmittance of the adopted light-transmitting material to the light signal is greater than the third threshold, for example, 80%, or 90%, etc., for transmitting the fingerprint detection signal from above the flexible display screen 210.
  • an opening may also be provided in the first adhesive layer 221, and the opening may be used to transmit the fingerprint detection signal.
  • the first adhesive layer 221 is also The light-transmitting material may not be used, as long as the first adhesive layer 221 has an adhesive effect and the openings in the first adhesive layer 221 can transmit sufficient fingerprint detection signals.
  • the curing shrinkage rate (or molding shrinkage rate) of the first adhesive layer 221 is less than a specific threshold, such as 10%, 20%, and so on.
  • a specific threshold such as 10%, 20%, and so on.
  • the buffer structure includes a flexible buffer layer 222, which is disposed between the flexible display screen 210 and the support 230, as shown in FIGS. 6 to 7 Shown.
  • the flexible buffer layer 222 may be made of a flexible light-transmitting buffer material, for example, a flexible light-transmitting buffer material such as polyimide (PI) or polyester (PET), optionally
  • a flexible light-transmitting buffer material such as polyimide (PI) or polyester (PET)
  • PI polyimide
  • PET polyester
  • the light transmittance of the flexible light-transmitting buffer material to the light signal is greater than a second threshold, for example, 80%, or 90%.
  • an opening may be provided in the flexible buffer layer 222, and the opening may be used to transmit the fingerprint detection signal.
  • the flexible buffer layer may not use light-transmitting materials. As long as the openings in the flexible buffer layer can transmit enough fingerprint detection signals.
  • the buffer structure 220 may further include at least one of the following:
  • the first adhesive layer 221 is arranged between the flexible display screen 210 and the flexible buffer layer 220, and is used to connect the flexible display screen 210 and the flexible buffer layer 220, and to transmit the fingerprint detection signal;
  • the second adhesive layer 223 is disposed between the flexible buffer layer 220 and the supporting member 230, and is used to connect the flexible buffer layer 220 and the supporting member 230 and to transmit the fingerprint detection signal.
  • first adhesive layer 221 may correspond to the first adhesive layer 221 in Embodiment 1. For the sake of brevity, it will not be repeated here.
  • the second adhesive layer 223 may be made of a material with an adhesive effect, and the second adhesive layer may also be used to transmit optical signals.
  • the second adhesive layer 223 can be made of light-transmissive and adhesive materials.
  • water glue, OCA, UV glue or soft silica gel, etc. optionally, the light-transmitting material used in the second adhesive layer 223
  • the light transmittance of the light signal is greater than a fourth threshold, for example, 80%, or 90%, etc., for transmitting the fingerprint detection signal from above the flexible display 210.
  • the second adhesive layer 223 may also be provided with an opening, and the opening may be used to transmit the fingerprint detection signal.
  • the second adhesive layer 223 is also The light-transmitting material may not be used, as long as the second adhesive layer 223 has an adhesive effect and the openings in the second adhesive layer 223 can transmit enough fingerprint detection signals.
  • the first adhesive layer 221 may be provided only on a part of the area below the flexible display screen 210, for example, the first adhesive layer 221 may be provided on the middle frame Below the partial area of the flexible display 210 corresponding to the opening, in this case, foam can be filled between the middle frame and the display; or, in other embodiments, the first adhesive layer 221 can also extend to The entire flexible display 210, that is, the first adhesive layer 212 can emit light and the entire area under the flexible display 210 is shown in FIG. 6 or FIG. Foam is arranged between 260, and the first adhesive layer 221 acts as a foam.
  • the flexible buffer layer 222 may also be provided only in a partial area under the flexible display screen 210, that is, the projection of the flexible buffer layer 222 on the flexible display screen 210 Covering a partial area of the flexible display screen 210, for example, the flexible buffer layer 222 may be disposed under the partial area of the flexible display screen 210 corresponding to the opening of the middle frame, as shown in FIG. 7; or, in another In some embodiments, the flexible buffer layer 222 may also extend to the entire flexible display screen 210, that is, the projection of the flexible buffer layer 222 on the flexible display screen 210 covers the entire area of the flexible display screen 210 As shown in FIG. 6, in this case, it is not necessary to provide foam between the flexible display 210 and the middle frame 260, and the flexible buffer layer 222 plays the role of foam.
  • the second adhesive layer 223 may also be provided only in a partial area or all of the area under the flexible display screen 210.
  • the flexible buffer layer is provided in a partial area under the flexible display screen
  • the The second adhesive layer 223 may also be provided in a local area under the flexible display 210, for example, in the display area corresponding to the opening of the middle frame; or, in the flexible buffer layer, it is provided in the flexible
  • the second adhesive layer 223 may be disposed in a partial area under the flexible display screen 210, for example, in the display screen area corresponding to the opening of the middle frame.
  • the optical fingerprint module 240 includes an optical component and an optical fingerprint sensor.
  • the optical component is used to guide or converge fingerprint detection signals to the optical sensor.
  • the sensor is used for detecting corresponding fingerprint information according to the fingerprint detection signal.
  • the optical component is a lens or a collimator, or a combination of a lens and a collimator.
  • optical component may correspond to the optical component 132 in the embodiment shown in FIG. 3, and for related descriptions, refer to the foregoing description of the optical component 132.
  • optical fingerprint sensor may correspond to the light detection part 134 in the embodiment shown in FIG. 3, and for related descriptions, please refer to the foregoing description of the light detection part 134. For brevity, details are not repeated here.
  • Figures 10 to 12 are schematic diagrams of a possible structure of the fingerprint identification device when the optical components adopt lenses, collimators, and microlens arrays.
  • the middle frame The opening method can be flexibly adjusted according to the working principle of the optical component, as long as it can support the support and ensure that sufficient light signals can reach the optical fingerprint sensor to image the user's fingerprint.
  • the specific composition of the buffer structure in FIGS. 10 to 12 can refer to the implementation manners in FIGS. 5 to 7.
  • the middle frame at the buffer structure Please refer to the examples in Figures 5 to 7 for the opening method, which will not be repeated here, as long as the buffer structure can avoid damage to the flexible display by the support, and at the same time buffer the external force acting on the flexible display. can.
  • foam may not be provided between the flexible display screen and the middle frame.
  • an embodiment of the present application also provides an electronic device 600.
  • the electronic device 600 may include a flexible display screen 601;
  • the fingerprint identification device 602 may be the fingerprint identification device 20 in the various embodiments of the present application as described above;
  • the middle frame 603 is used to support the support in the device 602, where the support is used to support the flexible display 601.
  • the flexible display screen 601 may correspond to the flexible display screen 210 in the foregoing embodiment.
  • details are not repeated here.
  • middle frame 603 may correspond to the middle frame 603 in the foregoing embodiment.
  • details are not repeated here.
  • the middle frame is formed with an opening
  • a step structure is formed at the edge of the first side of the opening
  • the support member is configured to be arranged on the step structure, so The first side of the opening is the side close to the support.
  • an inverted step structure is formed at the edge of the second side of the opening, and the optical fingerprint module is configured to be disposed in the inverted step structure, and the second side of the opening The two sides are the sides close to the optical fingerprint module.
  • the size of the first side of the opening is larger than the size of the second side of the opening.
  • the flexible display screen includes a bending area and a non-bending area, and the device is disposed in the non-bending area of the flexible display screen.
  • the units can be implemented by electronic hardware, computer software, or a combination of both, in order to clearly illustrate the interchangeability of hardware and software.
  • the composition and steps of each example have been described generally in terms of function. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the disclosed system and device may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments of the present application.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a
  • the storage medium includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program code .

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Abstract

一种指纹识别装置和电子设备，应用于具有柔性显示屏的电子设备，包括：缓冲结构，设置在所述柔性显示屏下方；支撑件，设置在所述缓冲结构下方，所述支撑件用于设置在所述电子设备的中框上，所述支撑件用于支撑所述柔性显示屏；光学指纹模组，设置在所述支撑件的下方，其中，经由所述柔性显示屏上方的人体手指反射或散射而返回的指纹检测信号通过所述缓冲结构和所述支撑件后被所述光学指纹模组接收，所述指纹检测信号用来检测所述手指的指纹信息。

Description

指纹识别装置和电子设备 技术领域
本申请实施例涉及指纹识别技术领域，并且更具体地，涉及指纹识别装置和电子设备。
背景技术
柔性显示屏以可折叠的属性给终端用户带来了不同的体验，但是柔性显示屏上的盖板的材料通常比较软，当用户按压显示屏进行指纹识别时，会导致显示屏下陷，会造成柔性显示屏损坏，影响用户体验，同时也无法保证指纹识别性能，甚至可能损坏指纹模组。因此，如何实现柔性显示屏的屏下指纹识别是一个亟待解决的技术问题。
发明内容
提供了一种指纹识别装置和电子设备，能够实现柔性显示屏的屏下指纹识别。
第一方面，提供了一种指纹识别装置，应用于具有柔性显示屏的电子设备，包括：
缓冲结构，设置在所述柔性显示屏下方；
支撑件，设置在所述缓冲结构下方，所述支撑件用于设置在所述电子设备的中框上，所述支撑件用于支撑所述柔性显示屏；
光学指纹模组，设置在所述支撑件的下方，
其中，经由所述柔性显示屏上方的人体手指反射或散射而返回的指纹检测信号通过所述缓冲结构和所述支撑件后被所述光学指纹模组接收，所述指纹检测信号用来检测所述手指的指纹信息。
在一些可能的实现方式中，所述中框形成有开孔，所述开孔的第一侧的边缘处形成有台阶结构，所述支撑件用于设置在所述台阶结构上，所述开孔的第一侧为靠近所述柔性显示屏的一侧。
在一些可能的实现方式中，所述开孔的第二侧的边缘处形成有倒台阶结构，所述光学指纹模组至少部分设置在所述倒台阶结构内。
在一些可能的实现方式中，所述中框形成有开孔，所述开孔的第二侧的 边缘处形成有倒台阶结构，所述支撑件用于设置在所述开孔内，并且所述支撑件的上表面形成有凸起部，所述支撑件的凸起部两侧的台阶面固定至所述倒台阶结构的台阶面，所述开孔的第二侧为远离所述柔性显示屏的一侧。
在一些可能的实现方式中，所述光学指纹模组设置在所述开孔的第二侧，所述开孔的第二侧为远离所述柔性显示屏的一侧。
在一些可能的实现方式中，所述支撑件为透光材料，所述透光材料对光信号的透过率大于第一阈值。
在一些可能的实现方式中，所述支撑件上设置有开孔，用于通过所述指纹检测信号。在一些可能的实现方式中，所述缓冲结构包括第一粘合层，所述第一粘合层用于连接所述柔性显示屏和所述支撑件。
在一些可能的实现方式中，所述第一粘合层设置在所述柔性显示屏下方的全部区域。
在一些可能的实现方式中，所述缓冲结构包括柔性缓冲层，设置在所述柔性显示屏和所述支撑件之间。
在一些可能的实现方式中，所述柔性缓冲层为透光材料，所述透光材料对光信号的透过率大于第二阈值。
在一些可能的实现方式中，所述柔性缓冲层上设置有开孔，用于通过所述指纹检测信号。
在一些可能的实现方式中，所述缓冲结构还包括以下中的至少一层：
第一粘合层，用于连接所述柔性显示屏和所述柔性缓冲层；
第二粘合层，用于连接所述柔性缓冲层和所述支撑件。
在一些可能的实现方式中，所述第一粘合层设置在所述柔性显示屏下方的全部区域，或设置所述柔性显示屏下方的局部区域，且在所述中框的开孔内。
在一些可能的实现方式中，所述第二粘合层在所述柔性显示屏的投影覆盖所述柔性显示屏的全部区域，或所述第二粘合层在所述柔性显示屏的投影覆盖所述柔性显示屏的局部区域，且所述第二粘合层设置在所述中框的开孔内。
在一些可能的实现方式中，所述第一粘合层为透光材料，所述透光材料对光信号的透过率大于第三阈值。
在一些可能的实现方式中，所述第二粘合层为透光材料，所述透光材料 对光信号的透过率大于第四阈值。
在一些可能的实现方式中，所述柔性缓冲层在所述柔性显示屏的投影覆盖所述柔性显示屏的全部区域，或所述柔性缓冲层在所述柔性显示屏的投影覆盖所述柔性显示屏的局部区域，且所述柔性缓冲层设置在所述中框的开孔内。
在一些可能的实现方式中，所述指纹识别装置还包括：
第三粘合层，用于将所述支撑件固定在所述中框上。
在一些可能的实现方式中，所述柔性显示屏包括折弯区和非折弯区，所述装置设置在所述柔性显示屏的非折弯区。
在一些可能的实现方式中，所述光学指纹模组包括光学组件和光学指纹传感器，其中，所述光学组件用于将指纹检测信号导引或汇聚到所述光学传感器，所述光学传感器用于根据所述指纹检测信号检测相应的指纹信息。
在一些可能的实现方式中，所述光学组件为透镜或准直器。
第二方面，提供了一种电子设备，包括：
显示屏；
如第一方面或第一方面的任一可能的实现方式中的指纹识别装置；
中框，用于支撑所述装置中的支撑件，其中所述支撑件用于支撑所述柔性显示屏。
在一些可能的实现方式中，所述中框形成有开孔，所述开孔的第一侧的边缘处形成有台阶结构，所述支撑件用于设置在所述台阶结构上，所述开孔的第一侧为靠近所述支撑件的一侧。
在一些可能的实现方式中，所述开孔的第二侧的边缘处形成有倒台阶结构，所述光学指纹模组用于设置在所述倒台阶结构内，所述开孔的第二侧为靠近所述光学指纹模组的一侧。
在一些可能的实现方式中，所述柔性显示屏包括折弯区和非折弯区，所述装置设置在所述柔性显示屏的非折弯区。
基于上述技术方案，通过在柔性显示屏的下方设置柔性缓冲层，以及在柔性缓冲层的下方设置支撑件，能够使得支撑件能够为柔性显示屏提供支撑作用，并且支撑件不直接接触柔性显示屏，能够避免对柔性显示屏的损伤，同时柔性缓冲层和柔性支撑件具有透光作用，这样，经由所述柔性显示屏上方的人体手指反射或散射而返回的指纹检测信号，能够通过柔性缓冲层和支 撑件后被光学指纹模组接收，用于获取用户手指的指纹信息。
附图说明
图1是根据本申请一实施例的电子设备的定向视图。
图2是根据本申请另一实施例的电子设备的定向视图。
图3是图1和图2所示的电子设备沿A-A’的部分剖面结构示意图。
图4是根据本申请实施例的指纹识别装置的示意性框图。
图5是根据本申请一实施例的指纹识别装置的示意性结构图。
图6是根据本申请另一实施例的指纹识别装置的示意性结构图。
图7是根据本申请再一实施例的指纹识别装置的示意性结构图。
图8为根据本申请实施例的中框上的一种开孔方式的示意性图。
图9为根据本申请实施例的中框上的另一种开孔方式的示意性图。
图10为基于透镜的指纹识别装置的示意性图。
图11为基于准直器的指纹识别装置的示意性图。
图12为基于微透镜阵列的指纹识别装置的示意性图。
图13是根据本申请实施例的电子设备的示意性结构图。
具体实施方式
下面将结合附图，对本发明实施例中的技术方案进行描述。
作为一种常见的应用场景，本申请实施例提供的指纹识别装置可以应用在智能手机、平板电脑以及其他具有柔性显示屏的移动终端或者其他终端设备；更具体地，在上述终端设备中，指纹识别装置可以具体为光学指纹装置，其可以设置在显示屏下方的局部区域或者全部区域，从而形成屏下(Under-display)光学指纹系统。
图1，图2和图3示出了本申请实施例可以适用的电子设备的示意图，其中，图1和图2为电子设备10的定向示意图，图3为图1和图2所示的电子设备10沿A’-A’的部分剖面结构示意图。
如图1至图3所示，所述电子设备10包括显示屏120和光学指纹装置130，其中，所述光学指纹装置130设置在所述显示屏120下方的局部区域，例如，显示屏中间区域的下方。所述光学指纹装置130包括光学指纹传感器，所述光学指纹传感器包括具有多个光学感应单元的感应阵列，所述感应阵列 所在区域或者其感应区域为所述光学指纹装置130的指纹检测区域103。如图1所示，所述指纹检测区域103位于所述显示屏120的显示区域之中。
应当理解，所述指纹检测区域103的面积可以与所述光学指纹装置130的感应阵列的面积不同，例如通过例如透镜成像的光路设计、反射式折叠光路设计或者其他光线汇聚或者反射等光路设计，可以使得所述光学指纹装置130的指纹检测区域103的面积大于所述光学指纹装置130感应阵列的面积。在其他替代实现方式中，如果采用例如光线准直方式进行光路引导，所述光学指纹装置130的指纹检测区域103也可以设计成与所述光学指纹装置130的感应阵列的面积基本一致。
因此，使用者在需要对所述终端设备进行解锁或者其他指纹验证的时候，只需要将手指按压在位于所述显示屏120的指纹检测区域103，便可以实现指纹输入。由于指纹检测可以在屏内实现，因此采用上述结构的电子设备10无需其正面专门预留空间来设置指纹按键(比如Home键)，从而可以采用全面屏方案，即所述显示屏120的显示区域可以基本扩展到整个电子设备10的正面。
作为一种可选的实现方式，如图3所示，所述光学指纹装置130包括光检测部分134和光学组件132，所述光检测部分134包括所述感应阵列以及与所述感应阵列电性连接的读取电路及其他辅助电路，其可以在通过半导体工艺制作在一个芯片(Die)，比如光学成像芯片或者光学指纹传感器，所述感应阵列具体为光探测器(Photo detector)阵列，其包括多个呈阵列式分布的光探测器，所述光探测器可以作为如上所述的光学感应单元；所述光学组件132可以设置在所述光检测部分134的感应阵列的上方，其可以具体包括滤光层(Filter)、导光层或光路引导结构以及其他光学元件，所述滤光层可以用于滤除穿透手指的环境光，例如，干扰成像的红外光，而所述导光层或光路引导结构主要用于从手指表面反射回来的反射光导引至所述感应阵列进行光学检测。
在具体实现上，所述光学组件132可以与所述光检测部分134封装在同一个光学指纹部件。比如，所述光学组件132可以与所述光学检测部分134封装在同一个光学指纹芯片，也可以将所述光学组件132设置在所述光检测部分134所在的芯片外部，比如将所述光学组件132贴合在所述芯片上方，或者将所述光学组件132的部分元件集成在上述芯片之中。
其中，所述光学组件132的导光层或者光路引导结构有多种实现方案，比如，所述导光层可以具体为在半导体硅片制作而成的准直器(Collimator)层，其具有多个准直单元或者微孔阵列，所述准直单元可以具体为小孔，从手指反射回来的反射光中，垂直入射到所述准直单元的光线可以穿过并被其下方的光学感应单元接收，而入射角度过大的光线在所述准直单元内部经过多次反射被衰减掉，因此每一个光学感应单元基本只能接收到其正上方的指纹纹路反射回来的反射光，从而所述感应阵列便可以检测出手指的指纹图像。
在另一种实施例中，所述导光层或者光路引导结构也可以为光学透镜(Lens)层，其具有一个或多个透镜单元，比如一个或多个非球面透镜组成的透镜组，其用于将从手指反射回来的反射光汇聚到其下方的光检测部分134的感应阵列，以使得所述感应阵列可以基于所述反射光进行成像，从而得到所述手指的指纹图像。可选地，所述光学透镜层在所述透镜单元的光路中还可以形成有针孔，所述针孔可以配合所述光学透镜层扩大所述光学指纹装置的视场，以提高所述光学指纹装置130的指纹成像效果。
在其他实施例中，所述导光层或者光路引导结构也可以具体采用微透镜(Micro-Lens)层，所述微透镜层具有由多个微透镜形成的微透镜阵列，其可以通过半导体生长工艺或者其他工艺形成在所述光检测部分134的感应阵列上方，并且每一个微透镜可以分别对应于所述感应阵列的其中一个感应单元。并且，所述微透镜层和所述感应单元之间还可以形成其他光学膜层，比如介质层或者钝化层，更具体地，所述微透镜层和所述感应单元之间还可以包括具有微孔的挡光层，其中所述微孔形成在其对应的微透镜和感应单元之间，所述挡光层可以阻挡相邻微透镜和感应单元之间的光学干扰，并使得所述感应单元所对应的光线通过所述微透镜汇聚到所述微孔内部并经由所述微孔传输到所述感应单元以进行光学指纹成像。
应当理解，上述光路引导结构的几种实现方案可以单独使用也可以结合使用，比如，可以在所述准直器层或者所述光学透镜层下方进一步设置微透镜层。当然，在所述准直器层或者所述光学透镜层与所述微透镜层结合使用时，其具体叠层结构或者光路可能需要按照实际需要进行调整。
作为一种可选的实施例，所述显示屏120可以采用具有自发光显示单元的显示屏，比如有机发光二极管(Organic Light-Emitting Diode，OLED)显 示屏或者微型发光二极管(Micro-LED)显示屏。以采用OLED显示屏为例，所述光学指纹装置130可以利用所述OLED显示屏120位于所述指纹检测区域103的显示单元(即OLED光源)来作为光学指纹检测的激励光源。当手指按压在所述指纹检测区域103时，显示屏120向所述指纹检测区域103上方的目标手指发出一束光，该光在手指的表面发生反射形成反射光或者经过所述手指内部散射而形成散射光，在相关专利申请中，为便于描述，上述反射光和散射光统称为反射光。由于指纹的嵴(ridge)与峪(vally)对于光的反射能力不同，因此，来自指纹嵴的反射光和来自指纹峪的发射光具有不同的光强，反射光经过光学组件后，被光学指纹装置130中的感应阵列所接收并转换为相应的电信号，即指纹检测信号；基于所述指纹检测信号便可以获得指纹图像数据，并且可以进一步进行指纹匹配验证，从而在所述电子设备10实现光学指纹识别功能。在其他实施例中，所述光学指纹装置130也可以采用内置光源或者外置光源来提供用于进行指纹检测的光信号。
应当理解的是，在具体实现上，所述电子设备10还包括透明保护盖板，其位于所述显示屏120的上方并覆盖所述电子设备10的正面。因为，本申请实施例中，所谓的手指按压在所述显示屏120实际上是指按压在所述显示屏120上方的盖板或者覆盖所述盖板的保护层表面。
另一方面，在某些实施例中，所述光学指纹装置130可以仅包括一个光学指纹传感器，此时光学指纹装置130的指纹检测区域103的面积较小且位置固定，因此用户在进行指纹输入时需要将手指按压到所述指纹检测区域103的特定位置，否则光学指纹装置130可能无法采集到指纹图像而造成用户体验不佳。在其他替代实施例中，所述光学指纹装置130可以具体包括多个光学指纹传感器；所述多个光学指纹传感器可以通过拼接方式并排设置在所述显示屏120的中间区域，且所述多个光学指纹传感器的感应区域共同构成所述光学指纹装置130的指纹检测区域103。也就是说，所述光学指纹装置130的指纹检测区域103可以包括多个子区域，每个子区域分别对应于其中一个光学指纹传感器的感应区域，从而将所述光学指纹装置130的指纹采集区域103可以扩展到所述显示屏的中间部分的主要区域，即扩展到手指惯常按压区域，从而实现盲按式指纹输入操作。可替代地，当所述光学指纹传感器数量足够时，所述指纹检测区域130还可以扩展到半个显示区域甚至整个显示区域，从而实现半屏或者全屏指纹检测。
可选地，在本申请一些实施例中，该光学指纹装置130还可以包括用于传输信号(例如所述指纹检测信号)的电路板，例如，所述电路板可以为柔性电路板(Flexible Printed Circuit，FPC)。光学指纹传感器可以连接到FPC，并通过所述FPC实现与其他外围电路或者电子设备中的其他元件的电性互连和信号传输。比如，所述光学指纹传感器可以通过所述FPC接收所述电子设备的处理单元的控制信号，并且还可以通过所述FPC将指纹检测信号(例如指纹图像)输出给所述电子设备的处理单元或者控制单元等。
在本申请实施例中，所述显示屏120为柔性显示屏，或称可折叠显示屏，例如，所述显示屏120可以采用塑料或金属等柔性材料制备。
在一些实施例中，所述显示屏120之上的盖板也可以为柔性材料，这样，在显示屏成品之后，其仍然是可以弯折变形的，在一些实施例中，根据显示屏的折叠方向，可以分为外翻式如图1所示，即显示屏的显示区域在显示屏的外侧，和内翻式如图2所示，即显示屏的显示区域在显示屏的内侧。
当盖板采用柔性材料时，盖板不能给显示屏提供支撑作用，此情况下，用户按压显示屏上的指纹检测区域进行指纹识别时，显示屏形变较大，影响指纹识别性能。
有鉴于此，本申请提供了一种指纹识别方案，能够在不影响显示屏的折叠和显示性能的情况下，保证指纹识别性能。
以下，结合图4至图12，详细说明根据本申请实施例的指纹识别装置。
需要说明的是，为便于说明，在本申请实施例中，相同的附图标记表示相同的部件，并且为了简洁，在不同实施例中，省略对相同部件的详细说明。
如图4所示，该指纹识别装置20可以包括：
缓冲结构220，设置在所述柔性显示屏210下方；
支撑件230，设置在所述缓冲结构220下方，所述支撑件用于设置在所述电子设备的中框260上，所述支撑件用于支撑所述柔性显示屏220；
光学指纹模组240，设置在所述支撑件230的下方，其中，所述光学指纹模组240用于接收经由所述柔性显示屏210上方的人体手指反射或散射而返回的指纹检测信号，其中所述指纹检测信号用来检测所述手指的指纹信息。
应理解，在本申请实施例中，所述显示屏210可以为图1至图3中所示的显示屏120，其相关说明可以参考可以参照前述关于显示屏120的描述， 为了简洁，在此不再赘述。
可选地，在一些实施例中，柔性显示屏210可以具有折弯区(如图1或图2所示的折弯区122)和非折弯区(如图1或图2所示的非折弯区121)。
应理解，在本申请实施例中，该光学指纹模组240可以对应于前文所述实施例中的光学指纹装置130，其相关说明可以参考可以参照前述关于光学指纹装置130的描述，为了简洁，在此不再赘述。
可选地，在一些实施例中，所述光学指纹模组240可以设置在柔性显示屏210的非折弯区，以避免柔性显示屏弯折时对光学指纹模组的损伤，影响指纹识别性能。
在本申请实施例中，支撑件230可以用于支撑该柔性显示屏210，该支撑件230可以设置在电子设备的中框260上，这样，中框260可以给支撑件230提供支撑作用，进一步地，所述支撑件230可以给柔性显示屏210提供支撑力。另外，在本申请实施例中，所述支撑件230还可以用于传输用于指纹检测的所述指纹检测信号。
可选地，在一些实施例中，所述支撑件230可以采用透光材料制备，例如，透明玻璃，亚克力等材料，可选地，所述透光材料对光信号的透光率大于第二阈值，例如，80％，或90％等。
可选地，在另一些实施例中，所述支撑件230中可以设置开孔，该开孔可以用于传输该指纹检测信号，此情况下，该支撑件230也可以不采用透光材料，只要该支撑件230中的开孔能够传输足够的指纹检测信号即可。
可选地，在一些实施例中，所述指纹识别装置20还包括：
第三粘合层236，用于将所述支撑件230固定在所述电子设备的中框260上。
可选地，所述第三粘合层可以为具有粘合作用的材料，例如，双面背胶。
可选地，在其他实施例中，所述支撑件也可以通过其他固定连接方式固定到所述中框上，例如，胶水固定方式，焊接固定方式，螺钉固定方式或耦合固定方式等，本申请实施例对此不作限定。
可选地，在本申请实施例中，所述中框上形成有开孔250，所述开孔250的第一侧用于支撑所述支撑件，所述开孔250还用于将所述指纹检测信号传导至所述光学指纹模组240，所述光学指纹模组240设置在所述开孔的第二侧，其中，所述开孔的第一侧为靠近所述柔性显示屏210的一侧，所述开孔 的第二侧为远离所述柔性显示屏210的一侧。
例如，第一侧的边缘处形成有台阶结构，所述支撑件230用于设置在所述台阶结构上，所述开孔250的第二侧的边缘处形成有倒台阶结构，所述光学指纹模组240用于设置在所述倒台阶结构内，其中，所述开孔的第二侧为远离所述柔性显示屏210的一侧。如图8所示是一种开孔方式的示意性图，该开孔的第一侧形成有台阶结构261，该支撑件230可以设置在该台阶结构260上，开孔的第二侧形成有倒台阶结构262，该光学指纹模组240至少部分设置在所述倒台阶结构262所形成的空间内。
又例如，所述开孔250的下表面的边缘处形成有倒台阶结构262，所述支撑件230为台阶结构，所述支撑件230的台阶面通过所述第三粘合层236粘合到所述倒台阶结构262的台阶面，如图9所示。
可选地，在一些实施例中，所述第一侧的开孔的尺寸大于所述第二侧的开孔的尺寸，这样，通过第一侧开孔处的台阶结构支撑所述支撑件，同时还可以保证透过所需的光以进行成像，同时确保能够遮挡不需要的光。
可选地，在本申请实施例中，所述缓冲结构220可以对柔性显示屏210起到缓冲作用，具体地，所述缓冲结构220可以吸收柔性显示屏210受到的应力，进而起到保护屏幕的作用，同时还可以防止支撑件230直接与柔性显示屏210直接接触，损伤柔性显示屏210。另外，所述缓冲结构220还可以用于传输用于指纹检测的所述指纹检测信号。
可选地，在本申请实施例中，所述缓冲结构220设置在所述柔性显示屏210的折弯区时，所述缓冲结构220可以为可折叠的柔性材料。
可选地，作为一个实施例，记为实施例1，所述缓冲结构220包括第一粘合层221，所述第一粘合层221可以对柔性显示屏210起到缓冲作用，并且，所述第一粘合层221还可以用于连接所述柔性显示屏210和所述支撑件230，如图5所示。
可选地，所述第一粘合层221可以设置在所述柔性显示屏下方的全部区域，也就是说，所述第一粘合层212也可以扩展至整个柔性显示屏210，此情况下，可以不必在柔性显示屏210和中框260之间设置泡棉，通过该第一粘合层221冲层起到泡棉的作用。
可选地，所述第一粘合层221可以采用具有粘合作用的材料，且该第一粘合层还可以用于传输光信号，在一种实施例中，所述第一粘合层221可以 采用透光且具有粘合作用的材料，例如，透明胶水，作为示例而非限定，光学胶(Optically Clear Adhesive，OCA)或软硅胶，可选地，所述第一粘合层221所采用的透光材料对光信号的透光率大于第三阈值，例如，80％，或90％等，用于透过来自柔性显示屏210上方的所述指纹检测信号。
可选地，在另一些实施例中，所述第一粘合层221中也可以设置开孔，该开孔可以用于传输该指纹检测信号，此情况下，该第一粘合层221也可以不采用透光材料，只要该第一粘合层221具有粘合作用且该第一粘合层221中的开孔能够传输足够的指纹检测信号即可。
可选地，在一些实施例中，所述第一粘合层221的固化收缩率(或称成型收缩率)小于特定阈值，例如10％，20％等。通过采用固化收缩率低的材料，能够避免成型收缩对柔性显示屏的损伤。
可选地，在另一些实施例中，记为实施例2，所述缓冲结构包括柔性缓冲层222，设置在所述柔性显示屏210和所述支撑件230之间，如图6至图7所示。
可选地，在一些实施例中，所述柔性缓冲层222可以采用柔性透光缓冲材料制备，例如，聚酰亚胺(PI)或聚酯(PET)等柔性透光缓冲材料，可选地，所述柔性透光缓冲材料对光信号的透光率大于第二阈值，例如，80％，或90％等。
可选地，在另一些实施例中，所述柔性缓冲层222中可以设置开孔，该开孔可以用于传输该指纹检测信号，此情况下，该柔性缓冲层也可以不采用透光材料，只要该柔性缓冲层中的开孔能够传输足够的指纹检测信号即可。
可选地，在该实施例2中，所述缓冲结构220还可以包括以下中的至少一层：
第一粘合层221，设置在所述柔性显示屏210和所述柔性缓冲层220之间，用于连接所述柔性显示屏210和所述柔性缓冲层220，以及用于传输所述指纹检测信号；
第二粘合层223，设置在所述柔性缓冲层220和所述支撑件230之间，用于连接所述柔性缓冲层220和所述支撑件230，以及用于传输所述指纹检测信号。
应理解，该第一粘合层221可以对应于实施例1中的第一粘合层221，为了简洁，这里不再赘述。
可选地，所述第二粘合层223可以采用具有粘合作用的材料，且该第二粘合层还可以用于传输光信号，在一种实施例中，所述第二粘合层223可以采用透光且具有粘合作用的材料，作为示例而非限定，水胶，OCA，UV胶或软硅胶等，可选地，所述第二粘合层223所采用的透光材料对光信号的透光率大于第四阈值，例如，80％，或90％等，用于透过来自柔性显示屏210上方的所述指纹检测信号。
可选地，在另一些实施例中，所述第二粘合层223中也可以设置开孔，该开孔可以用于传输该指纹检测信号，此情况下，该第二粘合层223也可以不采用透光材料，只要该第二粘合层223具有粘合作用且该第二粘合层223中的开孔能够传输足够的指纹检测信号即可。
可选地，在该实施例2中，所述第一粘合层221可以只设置在柔性显示屏210下方的部分区域，例如，所述第一粘合层221可以设置在所述中框的开孔对应的柔性显示屏210的局部区域下方，此情况下，中框和显示屏之间可以填充泡棉；或者，在另一些实施例中，所述第一粘合层221也可以扩展至整个柔性显示屏210，也就是说，第一粘合层212可以发光与柔性显示屏210下方的全部区域如图6或图7所示，此情况下，可以不必在柔性显示屏210和中框260之间设置泡棉，通过该第一粘合层221起到泡棉的作用。
可选地，在该实施例2中，所述柔性缓冲层222也可以只设置在柔性显示屏210下方的部分区域，也就是说，所述柔性缓冲层222在所述柔性显示屏210的投影覆盖所述柔性显示屏210的局部区域，例如，所述柔性缓冲层222可以设置在所述中框的开孔对应的柔性显示屏210的局部区域下方，如图7所示；或者，在另一些实施例中，所述柔性缓冲层222也可以扩展至整个柔性显示屏210，也就是说，所述柔性缓冲层222在所述柔性显示屏210的投影覆盖所述柔性显示屏210的全部区域，如图6所示，此情况下，可以不必在柔性显示屏210和中框260之间设置泡棉，通过该柔性缓冲层222起到泡棉的作用。
类似地，所述第二粘合层223也可以只设置在柔性显示屏210下方的部分区域或全部区域，例如，在所述柔性缓冲层设置在所述柔性显示屏下方的局部区域时，所述第二粘合层223也可以设置在所述柔性显示屏210下方的局部区域，例如设置在中框的开孔对应的显示屏区域；或者，在在所述柔性缓冲层设置在所述柔性显示屏下方的全部区域时，所述第二粘合层223可以 设置在所述柔性显示屏210下方的局部区域，例如设置在中框的开孔对应的显示屏区域。
可选地，在一些实施例中，所述光学指纹模组240包括光学组件和光学指纹传感器，其中，所述光学组件用于将指纹检测信号导引或汇聚到所述光学传感器，所述光学传感器用于根据所述指纹检测信号检测相应的指纹信息。
可选地，在一些具体实施例中，所述光学组件为透镜或准直器，或者透镜和准直器的组合。
应理解，该光学组件可以对应于图3所示实施例中的光学组件132，其相关说明可以参考可以参照前述关于光学组件132的描述，为了简洁，在此不再赘述。该光学指纹传感器可以对应于图3所示实施例中的光检测部分134，其相关说明可以参考可以参照前述关于光检测部分134的描述，为了简洁，在此不再赘述。
图10至图12为光学组件采用透镜，准直器和微透镜阵列时，该指纹识别装置的一种可能的结构的示意性图，从图10至图12可以看出，该中框上的开孔方式可以根据该光学组件的工作原理灵活调整，只要能够起到支撑该支撑件的作用，并且能够保证足够的光信号能够到达该光学指纹传感器，以对用户的指纹进行成像即可。
应理解，图10至图12中基于透镜，准直器和微透镜阵列的指纹识别装置的工作原理可以参考图3所示实施例中的相关说明，为了简洁，在此不再赘述
还应理解，图10至图12中的缓冲结构的具体组成可以参考图5至图7中的实现方式，当缓冲结构采用图5至图7中的实现方式时，该缓冲结构处的中框的开孔方式可以参考图5至图7中的示例，这里不再赘述，只要该缓冲结构能够避免支撑件对柔性显示屏的损伤，同时对作用到柔性显示屏上的外力起到缓冲作用即可。
可选地，在一些实施例中，若该缓冲结构能够起到间隔该柔性显示屏和中框的作用，则该柔性显示屏和中框之间也可以不设置泡棉。
如图13所示，本申请实施例还提供了一种电子设备600，如图13示，所述电子设备600可以包括柔性显示屏601；
指纹识别装置602，可以为如上述本申请各种实施例中的指纹识别装置 20；
中框603，用于支撑所述装置602中的支撑件，其中，所述支撑件用于支撑所述柔性显示601。
应理解，该柔性显示屏601可以对应于前述实施例中的柔性显示屏210，其相关说明可以参考可以参照前述关于柔性显示屏210的描述，为了简洁，在此不再赘述。
还应理解，该中框603可以对应于前述实施例中的中框603，其相关说明可以参考可以参照前述关于中框260的描述，为了简洁，在此不再赘述。
可选地，在一些实施例中，所述中框形成有开孔，所述开孔的第一侧的边缘处形成有台阶结构，所述支撑件用于设置在所述台阶结构上，所述开孔的第一侧为靠近所述支撑件的一侧。
可选地，在一些实施例中，所述开孔的第二侧的边缘处形成有倒台阶结构，所述光学指纹模组用于设置在所述倒台阶结构内，所述开孔的第二侧为靠近所述光学指纹模组的一侧。
可选地，在一些实施例中，所述开孔的第一侧的尺寸大于所述开孔的第二侧的尺寸。
可选地，在一些实施例中，所述柔性显示屏包括折弯区和非折弯区，所述装置设置在所述柔性显示屏的非折弯区。
应理解，本申请实施例中的具体的例子只是为了帮助本领域技术人员更好地理解本申请实施例，而非限制本申请实施例的范围。
应理解，在本申请实施例和所附权利要求书中使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本申请实施例。例如，在本申请实施例和所附权利要求书中所使用的单数形式的“一种”、“上述”和“所述”也旨在包括多数形式，除非上下文清楚地表示其他含义。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元，能够以电子硬件、计算机软件或者二者的结合来实现，为了清楚地说明硬件和软件的可互换性，在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
在本申请所提供的几个实施例中，应所述理解到，所揭露的系统、装置，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接，也可以是电的，机械的或其它的形式连接。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本申请实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分，或者所述技术方案的全部或部分可以以软件产品的形式体现出来，所述计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (27)

  1. 一种指纹识别装置，其特征在于，应用于具有柔性显示屏的电子设备，包括：
    缓冲结构，设置在所述柔性显示屏下方；
    支撑件，设置在所述缓冲结构下方，所述支撑件用于设置在所述电子设备的中框上，所述支撑件用于支撑所述柔性显示屏；
    光学指纹模组，设置在所述支撑件的下方，
    其中，经由所述柔性显示屏上方的人体手指反射或散射而返回的指纹检测信号通过所述缓冲结构和所述支撑件后被所述光学指纹模组接收，所述指纹检测信号用来检测所述手指的指纹信息。
  2. 根据权利要求1所述的指纹识别装置，其特征在于，所述中框形成有开孔，所述开孔的第一侧的边缘处形成有台阶结构，所述支撑件用于设置在所述台阶结构上，所述开孔的第一侧为靠近所述柔性显示屏的一侧。
  3. 根据权利要求2所述的指纹识别装置，其特征在于，所述开孔的第二侧的边缘处形成有倒台阶结构，所述光学指纹模组至少部分设置在所述倒台阶结构内。
  4. 根据权利要求1所述的指纹识别装置，其特征在于，所述中框形成有开孔，所述开孔的第二侧的边缘处形成有倒台阶结构，所述支撑件用于设置在所述开孔内，并且所述支撑件的上表面形成有凸起部，所述支撑件的凸起部两侧的台阶面固定至所述倒台阶结构的台阶面，所述开孔的第二侧为远离所述柔性显示屏的一侧。
  5. 根据权利要求2或4所述的指纹识别装置，其特征在于，所述光学指纹模组设置在所述开孔的第二侧，所述开孔的第二侧为远离所述柔性显示屏的一侧。
  6. 根据权利要求1至5中任一项所述的指纹识别装置，其特征在于，所述支撑件为透光材料，所述透光材料对光信号的透过率大于第一阈值。
  7. 根据权利要求1至5中任一项所述的指纹识别装置，其特征在于，所述支撑件上设置有开孔，用于通过所述指纹检测信号。
  8. 根据权利要求1至7中任一项所述的指纹识别装置，其特征在于，所述缓冲结构包括第一粘合层，所述第一粘合层用于连接所述柔性显示屏和所述支撑件。
  9. 根据权利要求8所述的指纹识别装置，其特征在于，所述第一粘合层设置在所述柔性显示屏下方的全部区域。
  10. 根据权利要求1至9中任一项所述的指纹识别装置，其特征在于，所述缓冲结构包括柔性缓冲层，设置在所述柔性显示屏和所述支撑件之间。
  11. 根据权利要求10所述的指纹识别装置，其特征在于，所述柔性缓冲层为透光材料，所述透光材料对光信号的透过率大于第二阈值。
  12. 根据权利要求10所述的指纹识别装置，其特征在于，所述柔性缓冲层上设置有开孔，用于通过所述指纹检测信号。
  13. 根据权利要求10至12中任一项所述的指纹识别装置，其特征在于，所述缓冲结构还包括以下中的至少一层：
    第一粘合层，用于连接所述柔性显示屏和所述柔性缓冲层；
    第二粘合层，用于连接所述柔性缓冲层和所述支撑件。
  14. 根据权利要求13所述的指纹识别装置，其特征在于，所述第一粘合层设置在所述柔性显示屏下方的全部区域，或设置所述柔性显示屏下方的局部区域，且在所述中框的开孔内。
  15. 根据权利要求13或14所述的指纹识别装置，其特征在于，所述第二粘合层在所述柔性显示屏的投影覆盖所述柔性显示屏的全部区域，或所述第二粘合层在所述柔性显示屏的投影覆盖所述柔性显示屏的局部区域，且所述第二粘合层设置在所述中框的开孔内。
  16. 根据权利要求13至15中任一项所述的指纹识别装置，其特征在于，所述第一粘合层为透光材料，所述透光材料对光信号的透过率大于第三阈值。
  17. 根据权利要求13至16中任一项所述的指纹识别装置，其特征在于，所述第二粘合层为透光材料，所述透光材料对光信号的透过率大于第四阈值。
  18. 根据权利要求10至17中任一项所述的指纹识别装置，其特征在于，所述柔性缓冲层在所述柔性显示屏的投影覆盖所述柔性显示屏的全部区域，或所述柔性缓冲层在所述柔性显示屏的投影覆盖所述柔性显示屏的局部区域，且所述柔性缓冲层设置在所述中框的开孔内。
  19. 根据权利要求1至18中任一项所述的指纹识别装置，其特征在于， 所述指纹识别装置还包括：
    第三粘合层，用于将所述支撑件固定在所述中框上。
  20. 根据权利要求1至19中任一项所述的指纹识别装置，其特征在于，所述柔性显示屏包括折弯区和非折弯区，所述装置设置在所述柔性显示屏的非折弯区。
  21. 根据权利要求1至20中任一项所述的指纹识别装置，其特征在于，所述光学指纹模组包括光学组件和光学指纹传感器，其中，所述光学组件用于将指纹检测信号导引或汇聚到所述光学传感器，所述光学传感器用于根据所述指纹检测信号检测相应的指纹信息。
  22. 根据权利要求1至21中任一项所述的指纹识别装置，其特征在于，所述光学组件为透镜或准直器，或透镜与准直器的组合
  23. 一种电子设备，其特征在于，包括：
    柔性显示屏；
    如权利要求1至22中任一项所述的指纹识别装置；
    中框，用于支撑所述指纹识别装置中的支撑件，其中所述支撑件用于支撑所述柔性显示屏。
  24. 根据权利要求23所述的电子设备，其特征在于，所述中框形成有开孔，所述开孔的第一侧的边缘处形成有台阶结构，所述支撑件用于设置在所述台阶结构上，所述开孔的第一侧为靠近所述支撑件的一侧。
  25. 根据权利要求24所述的电子设备，其特征在于，所述开孔的第二侧的边缘处形成有倒台阶结构，所述光学指纹模组用于设置在所述倒台阶结构内，所述开孔的第二侧为靠近所述光学指纹模组的一侧。
  26. 根据权利要求23至25中任一项所述的电子设备，其特征在于，所述开孔的第一侧的尺寸大于所述开孔的第二侧的尺寸。
  27. 根据权利要求23至26中任一项所述的电子设备，其特征在于，所述柔性显示屏包括折弯区和非折弯区，所述装置设置在所述柔性显示屏的非折弯区。
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