WO2020037627A1 - 指纹模组及其制备方法和电子设备及其制备方法 - Google Patents

指纹模组及其制备方法和电子设备及其制备方法 Download PDF

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Publication number
WO2020037627A1
WO2020037627A1 PCT/CN2018/102035 CN2018102035W WO2020037627A1 WO 2020037627 A1 WO2020037627 A1 WO 2020037627A1 CN 2018102035 W CN2018102035 W CN 2018102035W WO 2020037627 A1 WO2020037627 A1 WO 2020037627A1
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WO
WIPO (PCT)
Prior art keywords
fingerprint
fingerprint module
display screen
module
fingerprint sensor
Prior art date
Application number
PCT/CN2018/102035
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English (en)
French (fr)
Inventor
蔡军
凌伟
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
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Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=66510176&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2020037627(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
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 DE212018000412.9U priority Critical patent/DE212018000412U1/de
Priority to PCT/CN2018/102035 priority patent/WO2020037627A1/zh
Priority to CN201890001468.4U priority patent/CN212675566U/zh
Priority to CN201920611608.6U priority patent/CN209570950U/zh
Priority to CN201821392498.0U priority patent/CN208888831U/zh
Priority to CN201921257431.0U priority patent/CN210119790U/zh
Priority to US16/714,721 priority patent/US11238259B2/en
Publication of WO2020037627A1 publication Critical patent/WO2020037627A1/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
    • 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
    • G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • H10K59/8792—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. black layers

Definitions

  • the present application relates to the field of optical fingerprint technology, and more particularly, to a fingerprint module and a method for manufacturing the same, and an electronic device and a method for manufacturing the same.
  • the fingerprint module under the screen will be affected by various kinds of light during use.
  • OLED Organic Light-Emitting Diode
  • the polarizer in the display screen also has a large interference on the optical signal input into the fingerprint module, affecting the performance of fingerprint recognition.
  • the embodiments of the present application provide a fingerprint module, a method for manufacturing the same, and an electronic device and a method for manufacturing the same, which are beneficial to improving the performance of fingerprint recognition.
  • a fingerprint module including: a fingerprint sensor, wherein the first direction of the fingerprint module and the first direction of the fingerprint sensor have a first angle, and the first One direction is a direction parallel to a specific side of the fingerprint module, and the first direction of the fingerprint sensor is a direction parallel to a specific side of the fingerprint sensor.
  • the fingerprint sensor and the display screen of the electronic device also have a corresponding A certain included angle can reduce the influence of the polarizing plate on the light signal in the display screen, and at the same time reduce or eliminate moiré, which can improve the success rate of fingerprint recognition.
  • the first included angle is between -15 degrees and 15 degrees, and is not equal to zero.
  • the first included angle is between -45 degrees and 45 degrees, and is not equal to zero.
  • a first direction of the fingerprint module is parallel to a first direction of the display screen, and the display The first direction of the screen is a direction parallel to a specific side of the display screen.
  • the first included angle is determined according to a polarization direction of a polarizer in the display screen.
  • a fingerprint module including: a fingerprint sensor;
  • the first direction of the fingerprint sensor and the first direction of the display screen in the fingerprint module have a first angle
  • the first direction of the fingerprint sensor is a direction parallel to a specific side of the fingerprint sensor
  • the first direction of the display screen is a direction parallel to a specific side of the display screen.
  • the first direction of the fingerprint module is parallel to the first direction of the fingerprint sensor, wherein the first direction of the fingerprint module is a specific side of the fingerprint module. Parallel directions.
  • the first direction of the fingerprint module is parallel to the first direction of the display screen, wherein the first direction of the fingerprint module is a specific side of the fingerprint module Parallel directions.
  • the first included angle is between -45 degrees and 45 degrees, and is not equal to zero.
  • the first included angle is between -15 degrees and 15 degrees, and is not equal to zero.
  • the first included angle is determined according to a polarization direction of a polarizer in the display screen.
  • an electronic device including: a display screen;
  • the fingerprint module includes a fingerprint sensor, and the fingerprint module is disposed below the display screen;
  • the first direction of the fingerprint sensor and the first direction of the display screen have a first angle
  • the first direction of the fingerprint sensor is a direction parallel to a specific side of the fingerprint sensor
  • the display screen The first direction of is a direction parallel to a specific side of the display screen.
  • the first direction of the fingerprint module is parallel to the first direction of the display screen, and the first direction of the fingerprint module and the first direction of the fingerprint sensor have the A first included angle, wherein the first direction of the fingerprint module is a direction parallel to a specific side of the fingerprint module.
  • the first direction of the fingerprint module is parallel to the first direction of the fingerprint sensor, and the first direction of the fingerprint module and the first direction of the display screen have the A first included angle, wherein the first direction of the fingerprint module is a direction parallel to a specific side of the fingerprint module.
  • the first included angle is between -45 degrees and 45 degrees, and is not equal to zero.
  • the first included angle is between -15 degrees and 15 degrees, and is not equal to zero.
  • the first included angle is determined according to a polarization direction of a polarizer in the display screen.
  • a method for preparing a fingerprint module including: installing the fingerprint sensor in the fingerprint module along a direction that forms a first angle with the first direction of the fingerprint module, So that the first direction of the fingerprint sensor and the first direction of the fingerprint module have a first angle, wherein the first direction of the fingerprint module is a direction parallel to a specific side of the fingerprint module
  • the first direction of the fingerprint sensor is a direction parallel to a specific side of the fingerprint sensor.
  • the first included angle is between -15 degrees and 15 degrees, and is not equal to zero.
  • the first included angle is between -45 degrees and 45 degrees, and is not equal to zero.
  • a first direction of the fingerprint module is parallel to a first direction of the display screen, and the display The first direction of the screen is a direction parallel to a specific side of the display screen.
  • the first included angle is determined according to a polarization direction of a polarizer in the display screen.
  • a method for manufacturing an electronic device including:
  • the fingerprint module is installed below the display screen of the electronic device so that the first direction of the fingerprint sensor in the fingerprint module and the first direction of the display screen have the first angle, and
  • the first direction of the fingerprint sensor is a direction parallel to a specific side of the fingerprint sensor, and the first direction of the display screen is a direction parallel to a specific side of the display screen.
  • the first direction of the fingerprint module is parallel to the first direction of the display screen, and the first direction of the fingerprint module and the first direction of the fingerprint sensor have the A first included angle, wherein the first direction of the fingerprint module is a direction parallel to a specific side of the fingerprint module.
  • the first direction of the fingerprint module is parallel to the first direction of the fingerprint sensor, and the first direction of the fingerprint module and the first direction of the display screen have the A first included angle, wherein the first direction of the fingerprint module is a direction parallel to a specific side of the fingerprint module.
  • the first included angle is between -45 degrees and 45 degrees, and is not equal to zero.
  • the first included angle is between -15 degrees and 15 degrees, and is not equal to zero.
  • the first included angle is determined according to a polarization direction of a polarizer in the display screen.
  • FIG. 1 is a schematic structural diagram of a terminal device applicable to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a collected fingerprint image.
  • FIG. 3 is a schematic structural diagram of a fingerprint module according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of an installation angle of the fingerprint module of FIG. 3 in an electronic device.
  • FIG. 5 is a schematic diagram of a fingerprint image collected by a fingerprint sensor after the angle is adjusted.
  • FIG. 6 is a schematic structural diagram of a fingerprint module according to another embodiment of the present application.
  • FIG. 7 is a schematic block diagram of an electronic device according to an embodiment of the present application.
  • FIG. 8 is a directional view of an electronic device according to an embodiment of the present application.
  • FIG. 9 is a schematic sectional structural view of the electronic device shown in FIG. 8 along U-U.
  • FIG. 10 is a directional view of an electronic device according to another embodiment of the present application.
  • FIG. 11 is a schematic cross-sectional structure view of the electronic device shown in FIG. 10 along U-U.
  • FIG. 12 is a schematic flowchart of a method for manufacturing a fingerprint module according to an embodiment of the present application.
  • FIG. 13 is a schematic flowchart of a manufacturing method of an electronic device according to an embodiment of the present application.
  • embodiments of the present application can be applied to optical fingerprint systems, including but not limited to optical fingerprint recognition systems and medical diagnostic products based on optical fingerprint imaging.
  • the embodiments of this application only use the optical fingerprint system as an example, but should not The embodiments of the application constitute any limitation, and the embodiments of the present application are also applicable to other systems using optical imaging technology.
  • the optical fingerprint system provided in the embodiments of the present application can be applied to smart phones, tablet computers, and other mobile terminals with display screens or other terminal devices. More specifically, in the above terminal devices, fingerprint collection The device may be specifically an optical fingerprint device, which may be disposed in a partial area or the entire area below the display screen, thereby forming an under-display optical fingerprint system.
  • FIG. 1 is a schematic structural diagram of a terminal device applicable to the embodiment of the present application.
  • the terminal device 700 includes a display screen 720 and an optical fingerprint device 730.
  • the optical fingerprint device 730 is disposed below the display screen 720. Local area.
  • the optical fingerprint device 730 includes a sensing array having a plurality of optical sensing units, and a region where the sensing array is located is a fingerprint detection area 703 of the optical fingerprint device 730.
  • the fingerprint detection area 703 is located in the display area 702 of the display screen 720. Therefore, when the user needs to unlock the terminal device or perform other fingerprint verification, he only needs to press his finger In the fingerprint detection area 703 located on the display screen 720, fingerprint input can be realized.
  • the terminal device 700 adopting the above structure does not need a special reserved space on the front side to set fingerprint keys (such as the Home key), so a full-screen solution, that is, the display area of the display screen 720 can be adopted.
  • 702 can be basically extended to the front of the entire terminal device 700.
  • the display screen 720 may be a display screen with a self-emitting display unit, such as an organic light-emitting diode (OLED) display or a micro-LED display. Screen.
  • the optical fingerprint device 730 may use a display unit (ie, an OLED light source) of the OLED display 720 located in the fingerprint detection area 703 as an excitation light source for optical fingerprint detection.
  • the sensing array of the optical fingerprint device 730 is specifically a photodetector array, which includes a plurality of photodetectors distributed in an array, and the photodetectors can be used as the optical sensing unit described above.
  • the light emitted from the display unit of the fingerprint detection area 703 reflects on the fingerprint on the surface of the finger and forms reflected light, wherein the reflected light of the ridge and valley of the finger fingerprint is different
  • the reflected light is received from the display screen 720 and received by the photodetector array and converted into a corresponding electrical signal, that is, a fingerprint detection signal; based on the fingerprint detection signal, fingerprint image data can be obtained, and can be further processed. Fingerprint matching verification, so as to realize the optical fingerprint identification function in the terminal device 700.
  • the terminal device 700 further includes a transparent protective cover 710, which may be a glass cover or a sapphire cover, which is located above the display screen 720 and covers all The front of the terminal device 700 is described. Because, in the embodiment of the present application, the so-called finger pressing on the display screen 720 actually means pressing the cover plate 710 above the display screen 720 or the surface of the protective layer covering the cover plate 710.
  • the optical fingerprint device 730 includes a light detection portion 734 and an optical component 732.
  • the light detection portion 734 includes the sensing array and is electrically connected to the sensing array.
  • the connected reading circuit and other auxiliary circuits may be fabricated on one chip (Die) through a semiconductor process;
  • the optical component 732 may be disposed above the sensing array of the light detection portion 734, and may specifically include filtering Filter, light guide layer and other optical elements, the filter layer can be used to filter out ambient light that penetrates the finger, and the light guide layer is mainly used to guide the reflected light reflected from the finger surface to The sensing array performs optical detection.
  • the optical component 732 and the light detection portion 734 may be packaged in the same optical fingerprint chip.
  • the light guide layer may be a collimator layer or a lens layer made of a semiconductor silicon wafer.
  • the light guide layer may include a plurality of collimation units or lens units.
  • the collimation unit may be specifically It is a small hole.
  • the reflected light reflected from the finger the light incident on the collimation unit perpendicularly can pass through and be received by the optical sensing unit below it, and the oblique incident light passes through the inside of the collimation unit.
  • the secondary reflection is attenuated, so each optical sensing unit can basically only receive the reflected light reflected from the fingerprint pattern directly above it, so that the sensing array can detect the fingerprint image of the finger.
  • each collimation unit or lens unit may respectively correspond to one of the optical sensing units of the sensing array; alternatively, the collimator unit or the lens unit is in line with the sensing array.
  • Non-one-to-one correspondence can also be adopted between the optical sensing units to reduce the occurrence of moiré interference.
  • an optical sensing unit can correspond to multiple collimation units or lens units, or the collimation units or lens units also have The irregular arrangement can be adopted; the collimation unit or lens unit which adopts the irregular arrangement can correct the reflected light detected by each sensing unit through a later software algorithm.
  • the display screen 720 may also be a non-self-emitting display screen, such as a backlit liquid crystal display screen; in this case, the optical detection device 730 cannot use the display screen 720
  • the display unit is used as an excitation light source. Therefore, it is necessary to integrate an excitation light source inside the optical detection device 730 or to set an excitation light source outside to implement optical fingerprint detection. The detection principle is consistent with the above description.
  • optical fingerprint device in the embodiments of the present application may also be referred to as an optical fingerprint identification module, a fingerprint identification device, a fingerprint identification module, a fingerprint module, a fingerprint collection device, etc., and the above terms may be used interchangeably.
  • the technical solutions of the embodiments of the present application may also perform other biometric recognition, such as vein recognition or living body recognition, which is not limited in the embodiments of the present application.
  • the fingerprints collected In practical applications, due to the influence of polarizers on the display screen and the arrangement of the screen dot matrix, the fingerprints collected usually have the problems of clear diagonals and partial blur, as shown in Figure 2. This blurred area has a greater impact on fingerprint recognition. However, it may cause fingerprint recognition failure and affect user experience.
  • the embodiment of the present application proposes a solution.
  • the fingerprint sensor in the fingerprint module (corresponding to the aforementioned DIE, that is, the part used for light detection) and the display screen of the electronic device at a certain angle, It can effectively reduce the influence of polarizers on optical signals, and can also significantly reduce or eliminate moire.
  • the fingerprint module in the embodiment of the present application will be described below with reference to FIGS. 3 to 6.
  • FIG. 3 is a schematic structural diagram of a fingerprint module 100 according to an embodiment of the present application.
  • the fingerprint module 100 may include a fingerprint sensor 110, wherein the first direction 11 of the fingerprint sensor 110 and the fingerprint sensor 110 are The first direction 10 of the fingerprint module has a first included angle ⁇ .
  • the first direction 11 of the fingerprint sensor 110 may be a direction parallel to a specific side 111 of the fingerprint sensor.
  • the fingerprint module 100 may be a direction parallel to a specific side 101 of the fingerprint module. .
  • a specific side of the fingerprint module or the fingerprint sensor may be a long side in the rectangle, then the fingerprint module or the first side of the fingerprint sensor A direction may be a direction parallel to a long side of the fingerprint module or the fingerprint sensor.
  • the first direction of the fingerprint module can also refer to other sides, central axes, etc. of the fingerprint module as a reference. Similarly, the same applies to the first direction of the fingerprint sensor. The application embodiment does not limit this, as long as the fingerprint sensor has a certain included angle with respect to the shape of the fingerprint module.
  • the embodiment of the present application merely indicates the positional relationship of the fingerprint sensor in the fingerprint module, and introduces the concept of a specific edge, which does not mean that the shape of the fingerprint module and the fingerprint sensor must be a standard square or Rectangular.
  • the fingerprint module or the fingerprint sensor has other irregular shapes, virtual edges or axes such as the central axis of the fingerprint module or the fingerprint sensor can be used as a reference.
  • This embodiment of the present application does not limit this, as long as Relative to the positional relationship between the existing fingerprint sensor and the fingerprint module, the fingerprint sensor can be deflected at a certain angle relative to the fingerprint module.
  • the fingerprint sensor is placed in parallel in the fingerprint module, or the shapes of the fingerprint sensor and the fingerprint module are parallel.
  • the fingerprint sensor and the fingerprint module are parallel.
  • the fingerprint module has a certain included angle, that is, the fingerprint module and the shape of the fingerprint module have a certain included angle. In this case, the interference of the polarizing plate on the fingerprint image can be reduced, so that the fingerprint image collected by the fingerprint module is more Clear, can improve the performance of fingerprint recognition.
  • the included angle between the fingerprint sensor and the fingerprint module may be obtained by rotating the fingerprint sensor around the center of the fingerprint sensor, or the fingerprint sensor may use the fingerprint
  • the center of the module is obtained by rotating the fingerprint sensor, or may be obtained by rotating the fingerprint sensor with one corner of the fingerprint module as the center.
  • the embodiment of the present application does not limit this, as long as the fingerprint sensor is relatively
  • the shape of the fingerprint module can form a certain included angle.
  • the fingerprint sensor and the display screen of the electronic device also have a corresponding A certain included angle can reduce the influence of the polarizing plate on the light signal in the display screen, and at the same time reduce or eliminate moiré, which can improve the success rate of fingerprint recognition.
  • the first included angle ⁇ may be between -45 degrees and 45 degrees, and is not equal to zero, that is, -45 ° ⁇ 45 °.
  • the first included angle ⁇ may be between -15 degrees and 15 degrees, and is not equal to zero, that is, -15 ° ⁇ 15 °.
  • the first direction of the fingerprint module is parallel to the first direction of the display screen, wherein the The first direction of the display screen is a direction parallel to a specific side of the display screen.
  • the specific side of the display screen may be the short side of the display screen, or the side of the electronic device parallel to the ground when the electronic device is placed vertically. That is, when the electronic device is placed vertically, the first direction of the display screen is a direction parallel to the ground, which can be referred to as the horizontal direction of the display screen, and then the direction of the long side of the display screen is the vertical direction of the display screen. direction.
  • the fingerprint module may be installed below the display screen in an electronic device along a first direction parallel to the display screen.
  • the first direction of the fingerprint module and the first direction of the display screen The directions are parallel.
  • the first direction 30 of the display screen and the first direction 10 of the fingerprint module are parallel.
  • the fingerprint sensor in the fingerprint module already has a certain angle relative to the fingerprint module itself. Therefore, it is not necessary to adjust the fingerprint module when installing the fingerprint module in an electronic device.
  • the installation angle of the group in the electronic device is convenient for the installation of the electronic device, and can also be better compatible with the existing installation process of the electronic device.
  • the first direction of the fingerprint module and the first direction of the display screen may also have a certain angle, that is, It is not necessary to install the fingerprint module parallel to the first direction of the display screen.
  • the fingerprint module may be rotated clockwise by ⁇ degrees and installed below the display screen, so that the first direction of the fingerprint module and the first direction of the display screen have an angle ⁇ .
  • the angle between the first direction of the fingerprint sensor and the first direction of the fingerprint module is ⁇
  • the angle between the first direction of the fingerprint sensor and the first direction of the display screen is ⁇ + ⁇
  • it is only required to ensure that ⁇ + ⁇ is within the above-mentioned angle range.
  • the angle between the first direction of the fingerprint module and the first direction of the display screen is not specifically limited.
  • FIG. 5 is a schematic diagram of a fingerprint image collected when the fingerprint module 100 is installed in parallel to a display screen of an electronic device.
  • the first direction of the fingerprint sensor and the first display screen The angle between the orientations (horizontal when placed vertically) is 15 degrees.
  • the sharpness of the fingerprint image collected by the fingerprint sensor after the angle adjustment is improved. .
  • the fingerprint image parallel to or approximately parallel to the polarization direction of the polarizer in the display screen is usually clear, and the fingerprint image perpendicular to or approximately perpendicular to the polarization direction It is usually fuzzy, so the angle between the fingerprint sensor and the display screen can be set according to the polarization direction of the polarizer to reduce the influence of the polarizer on the fingerprint imaging on the display screen.
  • the fingerprint module 100 may correspond to the optical fingerprint device 730 in FIG. 1, the fingerprint sensor 110 may correspond to the light detection portion 734 in FIG. 1, and the electronic device may correspond to the For the terminal device 700, the display screen corresponds to the display screen 720. Therefore, the fingerprint module 100 may further include a module in the optical fingerprint device 730, for example, a filter layer, a light guide layer, and other optical elements. I won't go into details here.
  • the fingerprint module 200 includes: a fingerprint sensor 210;
  • the first direction 21 of the fingerprint sensor 210 and the first direction 30 of the display screen in the fingerprint module 200 have A first included angle
  • the first direction 21 of the fingerprint sensor is a direction parallel to a specific side of the fingerprint sensor
  • the first direction 30 of the display screen is a direction parallel to a specific side of the display screen.
  • the fingerprint sensor in the fingerprint module when the fingerprint module 200 is installed below the display screen, the fingerprint sensor in the fingerprint module has a certain angle with respect to the display screen, that is, relative to the existing fingerprint sensor and display.
  • the fingerprint sensor and the display screen in the embodiment of the present application have a certain deflection angle, and the angle may be generated by the fingerprint module deflection relative to the display screen, or may be as in the foregoing embodiment.
  • the angle is generated when the fingerprint sensor is deflected relative to the fingerprint module when the fingerprint module is prepared, which is not limited in the embodiment of the present application.
  • the relative angles of the fingerprint module, fingerprint sensor, and display screen may include the following situations:
  • Case 1 The first direction of the fingerprint module is parallel to the first direction of the fingerprint sensor, and the first direction of the fingerprint module and the first direction of the display screen have a first angle.
  • an included angle between the first direction of the fingerprint sensor and the first direction of the display screen may be generated by rotating the entire fingerprint module.
  • Case 2 the first direction of the fingerprint module is parallel to the first direction of the display screen, and the first direction of the fingerprint module and the first direction of the fingerprint sensor have a first angle.
  • an included angle between the first direction of the fingerprint sensor and the first direction of the display screen may be generated by rotating the fingerprint sensor when preparing the fingerprint module.
  • the fingerprint module When the fingerprint module is installed in an orientation, there must be a certain angle between the first direction of the fingerprint sensor and the first direction of the display screen.
  • the first direction of the fingerprint module has a certain angle with the first direction of the display screen, and the first direction of the fingerprint module has a certain angle with the first direction of the fingerprint sensor. .
  • the first direction of the fingerprint sensor and the first direction of the fingerprint module have a certain angle.
  • the first direction of the fingerprint module and the display The first direction of the screen also has a certain angle. In the end, it is only necessary to ensure that the angle between the first direction of the fingerprint sensor and the first direction of the display screen is within a certain range.
  • the fingerprint sensor and the fingerprint module having a certain angle may mean that the first direction of the fingerprint sensor and the first direction of the fingerprint module have a certain angle.
  • the fingerprint sensor and the The angle between the display screens can be understood as the angle between the first direction of the fingerprint sensor and the first direction of the display screen. Similar descriptions can be made for similar descriptions, and are not repeated here.
  • the fingerprint sensor and the fingerprint module having a certain angle can be understood as the installation position of the fingerprint sensor, compared to the existing fingerprint module in the existing fingerprint module.
  • the mounting position of the fingerprint sensor has a certain angle of deflection.
  • the fingerprint sensor may be rotated around the center of the fingerprint sensor by a specific angle to form an included angle between the fingerprint sensor and the fingerprint module.
  • the first included angle is between -45 degrees and 45 degrees, and is not equal to zero.
  • the first included angle is between -15 degrees and 15 degrees, and is not equal to zero.
  • the fingerprint module 200 may correspond to the optical fingerprint device 730 in FIG. 1, the fingerprint sensor 210 may correspond to the light detection portion 734 in FIG. 1, and the electronic device 300 may correspond to In the terminal device 700, the display screen corresponds to the display screen 720. Therefore, the fingerprint module 200 may further include a module in the optical fingerprint device 730, such as a filter layer, a light guide layer, and other optical elements. I won't go into details here.
  • the electronic device 400 includes: a display screen 410;
  • the fingerprint module 420 includes a fingerprint sensor 421, and the fingerprint module 420 is disposed below the display screen 410;
  • the first direction 42 of the fingerprint sensor 421 and the first direction 41 of the display screen 410 have a first angle.
  • the first direction 42 of the fingerprint sensor is a direction parallel to a specific side of the fingerprint sensor.
  • the first direction 41 of the display screen 410 is a direction parallel to a specific side of the display screen.
  • the fingerprint sensor in the electronic device may have a certain angle with the display screen of the electronic device. In this way, a certain angle may be generated between the fingerprint pattern generated by the display screen and the pattern generated by the fingerprint sensor. , Which can reduce or eliminate moiré, and at the same time set the angle between the fingerprint sensor and the display according to the polarization direction of the polarizer in the display, which is beneficial to reduce Impact, which can improve the success rate of fingerprint recognition.
  • the first included angle is between -45 degrees and 45 degrees, and is not equal to zero.
  • the first included angle is between -15 degrees and 15 degrees, and is not equal to zero.
  • the display screen may be an OLED screen or a liquid crystal display (Liquid Crystal Display) screen.
  • the relative angles of the fingerprint module, the fingerprint sensor, and the display screen may also be Case 1 to Case 3 described above, and details are not described herein again.
  • FIG. 8 is a directional view of the electronic device 400 in case 1.
  • FIG. 9 is a partial cross-sectional structure diagram of the electronic device 400 shown in FIG. 8 along U-U.
  • FIG. 10 is a directional view of the electronic device 400 in case 2.
  • FIG. 11 is a schematic cross-sectional structure view of the electronic device 400 shown in FIG. 10 along U-U.
  • the first direction of the fingerprint module 420 is parallel to the first direction of the fingerprint sensor 421, and the first direction of the fingerprint module 420 is parallel to the first direction of the display screen (when an electronic device When placed vertically, the horizontal direction) has a certain angle.
  • the preparation process of the fingerprint module in the electronic device may use the existing preparation process, and the preparation process of the electronic device is different from the preparation process of the existing electronic device.
  • the fingerprint sensor in the fingerprint module and the display screen have a certain angle.
  • the entire fingerprint module needs to be rotated to make the fingerprint module
  • the angle between the fingerprint sensor and the display is within a specific range. In this embodiment, since the fingerprint module needs to be rotated in the middle frame, sufficient space needs to be reserved for the fingerprint module.
  • the first direction of the fingerprint module 420 is parallel to the first direction of the display screen, and the first direction of the fingerprint module 420 and the first direction of the fingerprint sensor 421 (when the electronic device When placed vertically, the horizontal direction) has a certain angle.
  • the preparation process of the electronic device may use an existing preparation process, and the preparation process of the fingerprint module is different from the existing preparation process.
  • the fingerprint sensor in the fingerprint module It has a certain angle with the display screen.
  • the fingerprint sensor can be rotated so that the fingerprint sensor in the fingerprint module has a certain angle with respect to the shape of the fingerprint module.
  • a certain angle may be formed between the fingerprint sensor in the fingerprint module and the display screen.
  • the electronic device further includes other components, such as a flexible printed circuit board (FPC) 440, a bracket 450, a foam 460, and a middle frame 470.
  • FPC flexible printed circuit board
  • the foam 460 is disposed on the upper surface of the bracket 450, and the foam 460 can be used for sealing against dust.
  • the middle frame 470 is a frame of an electronic device disposed between the display screen 410 and the back cover and used to carry various internal components.
  • the various internal components include, but are not limited to, a battery, a motherboard, a camera, a cable, various sensors, and a microphone. , Handset and so on.
  • the fingerprint sensor 421 can be soldered to the FPC 440 through a pad, and the FPC 440 can be used to achieve electrical interconnection and signal transmission with other peripheral circuits or other components of the electronic device as shown in FIG. 6 or 7.
  • the fingerprint sensor may receive the control signal of the processing unit of the electronic device through the FPC 440, and may further output the fingerprint image collected by the fingerprint sensor 421 to the electronic device through the FPC 440. Unit or control unit.
  • the method for preparing the fingerprint module and the electronic device shown below is only a possible implementation manner for realizing the fingerprint module and the electronic device in the embodiments of the present application, and should not constitute any limitation to the present application.
  • the examples can also use other preparation methods to prepare the above structure.
  • FIG. 12 and FIG. 13 show the steps or operations of the method for manufacturing the fingerprint module and the electronic device according to the embodiments of the present application are merely examples, and the embodiments of the present application may also perform other operations or the operations of FIGS. 12 and 13 Variations of various operations.
  • each step in FIG. 12 and FIG. 13 may be performed in a different order than that presented in FIG. 12 and FIG. 13, and it may not be necessary to perform all the operations in FIG. 12 and FIG. 13.
  • FIG. 12 is a schematic flowchart of a method 500 for manufacturing a fingerprint module according to an embodiment of the present application. As shown in FIG. 12, the method 500 includes the following content:
  • the first included angle is between -15 degrees and 15 degrees, and is not equal to zero.
  • the first included angle is between -45 degrees and 45 degrees, and is not equal to zero.
  • the first direction of the fingerprint module is parallel to the first direction of the display screen, wherein the The first direction of the display screen is a direction parallel to a specific side of the display screen.
  • the first included angle is determined according to a polarization direction of a polarizer in the display screen.
  • FIG. 13 is a schematic flowchart of a manufacturing method 600 of an electronic device according to an embodiment of the present application. As shown in FIG. 13, the method 600 includes the following content:
  • the first direction of the fingerprint module is parallel to the first direction of the display screen, and the first direction of the fingerprint module and the first direction of the fingerprint sensor have The first included angle, wherein the first direction of the fingerprint module is a direction parallel to a specific side of the fingerprint module.
  • the specific implementation process is not repeated here.
  • the first direction of the fingerprint module is parallel to the first direction of the fingerprint sensor, and the first direction of the fingerprint module and the first direction of the display screen have The first included angle, wherein the first direction of the fingerprint module is a direction parallel to a specific side of the fingerprint module.
  • the specific implementation process is not repeated here.
  • the first included angle is between -45 degrees and 45 degrees, and is not equal to zero.
  • the first included angle is between -15 degrees and 15 degrees, and is not equal to zero.
  • the first included angle is determined according to a polarization direction of a polarizer in the display screen.
  • the size of the sequence numbers of the above processes does not mean the order of execution.
  • the execution order of each process should be determined by its function and internal logic, and should not deal with the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division.
  • multiple units or components may be combined or 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, which may be electrical, mechanical or other forms.
  • 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, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each of the units may exist separately physically, or two or more units may be integrated into one unit.
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially a part that contributes to the existing technology or a part of the technical solution may be embodied in the form of a software product, where the computer software product is stored in a storage medium , Including a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application.
  • the aforementioned storage media include: U disks, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks or compact discs, and other media that can store program codes .

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Abstract

一种指纹模组及其制备方法和电子设备及其制备方法，有利于提升指纹识别的性能，该指纹模组包括：指纹传感器，其中，所述指纹模组的第一方向与所述指纹传感器的第一方向具有第一夹角，所述指纹模组的第一方向为与所述指纹模组的特定边平行的方向，所述指纹传感器的第一方向为与所述指纹传感器的特定边平行的方向。

Description

指纹模组及其制备方法和电子设备及其制备方法 技术领域
本申请涉及光学指纹技术领域，并且更具体地，涉及一种指纹模组及其制备方法和电子设备及其制备方法。
背景技术
屏下指纹模组在使用中会受到各种光的干扰，例如，对于有机发光二极管(Organic Light-Emitting Diode，OLED)屏而言，由于OLED屏的结构形态，透过显示屏的光线会产生莫尔条纹，另外，显示屏中的偏振片也对输入到指纹模组中的光信号具有较大的干扰，影响指纹识别的性能。
发明内容
本申请实施例提供了一种指纹模组及其制备方法和电子设备及其制备方法，有利于提升指纹识别的性能。
第一方面，提供了一种指纹模组，包括：指纹传感器，其中，所述指纹模组的第一方向与所述指纹传感器的第一方向具有第一夹角，所述指纹模组的第一方向为与所述指纹模组的特定边平行的方向，所述指纹传感器的第一方向为与所述指纹传感器的特定边平行的方向。
因此，通过设置该指纹传感器和指纹模组之间具有一定的夹角，这样，当该指纹模组平行安装到电子设备上时，该指纹传感器和该电子设备的显示屏之间相应的也具有一定的夹角，从而能够降低显示屏中的偏振片对光信号的影响，同时降低或消除莫尔条纹，进而能够提升指纹识别的成功率。
在一种可能的实现方式中，所述第一夹角在-15度到15度之间，且不等于零。
在一种可能的实现方式中，所述第一夹角在-45度到45度之间，且不等于零。
在一种可能的实现方式中，所述指纹模组安装于电子设备的显示屏的下方时，所述指纹模组的第一方向和所述显示屏的第一方向平行，其中，所述显示屏的第一方向为与所述显示屏的特定边平行的方向。
在一种可能的实现方式中，所述第一夹角是根据所述显示屏中的偏振片 的偏振方向确定的。
第二方面，提供了一种指纹模组，包括：指纹传感器；
其中，所述指纹模组安装于电子设备的显示屏的下方时，所述指纹模组中的所述指纹传感器的第一方向和所述显示屏的第一方向具有第一夹角，所述指纹传感器的第一方向为与所述指纹传感器的特定边平行的方向，所述显示屏的第一方向为与所述显示屏的特定边平行的方向。
在一种可能的实现方式中，所述指纹模组的第一方向与所述指纹传感器的第一方向平行，其中，所述指纹模组的第一方向为与所述指纹模组的特定边平行的方向。
在一种可能的实现方式中，所述指纹模组的第一方向与所述显示屏的第一方向平行，其中，所述指纹模组的第一方向为与所述指纹模组的特定边平行的方向。
因此，通过调整指纹模组中的指纹传感器相对于该指纹模组的角度，或者通过调整指纹模组相对于该显示屏的角度，以使该指纹传感器和显示屏之间具有一定的角度，从而能够降低偏振片对输入到指纹模组中的光信号的影响，同时能够减少或消除莫尔条纹，进而能够提升指纹识别的成功率。
在一种可能的实现方式中，所述第一夹角在-45度到45度之间，且不等于零。
在一种可能的实现方式中，所述第一夹角在-15度到15度之间，且不等于零。
在一种可能的实现方式中，所述第一夹角是根据所述显示屏中的偏振片的偏振方向确定的。
第三方面，提供了一种电子设备，包括：显示屏；
指纹模组，包括指纹传感器，所述指纹模组设置于所述显示屏的下方；
其中，所述指纹传感器的第一方向和所述显示屏的第一方向具有第一夹角，所述指纹传感器的第一方向为与所述指纹传感器的特定边平行的方向，所述显示屏的第一方向为与所述显示屏的特定边平行的方向。
在一种可能的实现方式中，所述指纹模组的第一方向与所述显示屏的第一方向平行，所述指纹模组的第一方向和所述指纹传感器的第一方向具有所述第一夹角，其中，所述指纹模组的第一方向为与所述指纹模组的特定边平行的方向。
在一种可能的实现方式中，所述指纹模组的第一方向与所述指纹传感器的第一方向平行，所述指纹模组的第一方向与所述显示屏的第一方向具有所述第一夹角，其中，所述指纹模组的第一方向为与所述指纹模组的特定边平行的方向。
在一种可能的实现方式中，所述第一夹角在-45度到45度之间，且不等于零。
在一种可能的实现方式中，所述第一夹角在-15度到15度之间，且不等于零。
在一种可能的实现方式中，所述第一夹角是根据所述显示屏中的偏振片的偏振方向确定的。
第四方面，提供了一种指纹模组的制备方法，包括：沿与所述指纹模组的第一方向成第一夹角的方向，将所述指纹传感器安装于所述指纹模组中，以使所述指纹传感器的第一方向和所述指纹模组的第一方向具有第一夹角，其中，所述指纹模组的第一方向为与所述指纹模组的特定边平行的方向，所述指纹传感器的第一方向为与所述指纹传感器的特定边平行的方向。
在一种可能的实现方式中，所述第一夹角在-15度到15度之间，且不等于零。
在一种可能的实现方式中，所述第一夹角在-45度到45度之间，且不等于零。
在一种可能的实现方式中，所述指纹模组安装于电子设备的显示屏的下方时，所述指纹模组的第一方向和所述显示屏的第一方向平行，其中，所述显示屏的第一方向为与所述显示屏的特定边平行的方向。
在一种可能的实现方式中，所述第一夹角是根据所述显示屏中的偏振片的偏振方向确定的。
第四方面，提供了一种电子设备的制备方法，包括：
将指纹模组安装于所述电子设备的显示屏的下方，以使所述指纹模组中的指纹传感器的第一方向与所述显示屏的第一方向具有所述第一夹角，所述指纹传感器的第一方向为与所述指纹传感器的特定边平行的方向，所述显示屏的第一方向为与所述显示屏的特定边平行的方向。
在一种可能的实现方式中，所述指纹模组的第一方向与所述显示屏的第一方向平行，所述指纹模组的第一方向和所述指纹传感器的第一方向具有所 述第一夹角，其中，所述指纹模组的第一方向为与所述指纹模组的特定边平行的方向。
在一种可能的实现方式中，所述指纹模组的第一方向与所述指纹传感器的第一方向平行，所述指纹模组的第一方向与所述显示屏的第一方向具有所述第一夹角，其中，所述指纹模组的第一方向为与所述指纹模组的特定边平行的方向。
在一种可能的实现方式中，所述第一夹角在-45度到45度之间，且不等于零。
在一种可能的实现方式中，所述第一夹角在-15度到15度之间，且不等于零。
在一种可能的实现方式中，所述第一夹角是根据所述显示屏中的偏振片的偏振方向确定的。
附图说明
图1是本申请实施例所适用的终端设备的结构示意图。
图2是采集的指纹图像的示意图。
图3是根据本申请一实施例的指纹模组的结构示意图。
图4是图3的指纹模组在电子设备中的安装角度的示意图。
图5是调整角度后的指纹传感器采集的指纹图像的示意图。
图6是根据本申请另一实施例的指纹模组的结构示意图。
图7是根据本申请实施例的电子设备的示意性框图。
图8为根据本申请一实施例的电子设备的定向视图。
图9是图8所示的电子设备沿U-U的部分剖面结构示意图。
图10为根据本申请另一实施例的电子设备的定向视图。
图11是图10所示的电子设备沿U-U的部分剖面结构示意图。
图12是根据本申请实施例的指纹模组的制备方法的示意性流程图。
图13是根据本申请实施例的电子设备的制备方法的示意性流程图。
具体实施方式
下面将结合附图，对本申请实施例中的技术方案进行描述。
应理解，本申请实施例可以应用于光学指纹系统，包括但不限于光学指 纹识别系统和基于光学指纹成像的医疗诊断产品，本申请实施例仅以光学指纹系统为例进行说明，但不应对本申请实施例构成任何限定，本申请实施例同样适用于采用光学成像技术的其他系统等。
作为一种常见的应用场景，本申请实施例提供的光学指纹系统可以应用在智能手机、平板电脑以及其他具有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，指纹采集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。
如图1所示为本申请实施例可以适用的终端设备的结构示意图，所述终端设备700包括显示屏720和光学指纹装置730，其中，所述光学指纹装置730设置在所述显示屏720下方的局部区域。所述光学指纹装置730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为所述光学指纹装置730的指纹检测区域703。如图1所示，所述指纹检测区域703位于所述显示屏720的显示区域702之中，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720的指纹检测区域703，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终端设备700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720的显示区域702可以基本扩展到整个终端设备700的正面。
作为一种优选的实施例中，所述显示屏720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730可以利用所述OLED显示屏720位于所述指纹检测区域703的显示单元(即OLED光源)来作为光学指纹检测的激励光源。并且，所述光学指纹装置730的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。当手指按压在所述指纹检测区域703时，所述指纹检测区域703的显示单元发出的光线在手指表面的指纹发生反射并形成反射光，其中所述手指指纹的脊和谷的反射光是不同的，反射光从所述显示屏720并被所述光探测器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，从而在所述终端设备700实现光学指纹识别功能。
应当理解的是，在具体实现上，所述终端设备700还包括透明保护盖板710，所述盖板710可以为玻璃盖板或者蓝宝石盖板，其位于所述显示屏720的上方并覆盖所述终端设备700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720实际上是指按压在所述显示屏720上方的盖板710或者覆盖所述盖板710的保护层表面。
作为一种可选的实现方式，如图1所示，所述光学指纹装置730包括光检测部分734和光学组件732，所述光检测部分734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)；所述光学组件732可以设置在所述光检测部分734的感应阵列的上方，其可以具体包括滤光层(Filter)、导光层以及其他光学元件，所述滤光层可以用于滤除穿透手指的环境光，而所述导光层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732可以与所述光检测部分734封装在同一个光学指纹芯片。其中，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)层或者透镜(Lens)层，其具有多个准直单元或者透镜单元，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，而倾斜入射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。
在所述光学指纹装置730中，每一个准直单元或者透镜单元可以分别对应所述感应阵列的其中一个光学感应单元；可替代地，所述准直器单元或者透镜单元跟所述感应阵列的光学感应单元之间也可以采用非一一对应的关系来降低产生莫尔条纹干扰，比如一个光学感应单元可以对应于多个准直单元或者透镜单元，或者，所述准直单元或者透镜单元也可以采用不规则排列的方式；采用不规则排列的准直单元或者透镜单元可以通过后期软件算法来对每一个感应单元检测到的反射光线进行校正。
在其他替代实现方式中，所述显示屏720也可以采用非自发光的显示屏，比如采用背光的液晶显示屏；在这种情况下，所述光学检测装置730便无法采用所述显示屏720的显示单元作为激励光源，因此需要在所述光学检测装 置730内部集成激励光源或者在其外部设置激励光源来实现光学指纹检测，其检测原理与上面描述内容是一致的。
应理解，本申请实施例中的光学指纹装置也可以称为光学指纹识别模组、指纹识别装置、指纹识别模组、指纹模组、指纹采集装置等，上述术语可以相互替换使用。
还应理解，本申请实施例的技术方案除了可以进行指纹识别外，还可以进行其他生物特征识别，例如，静脉识别或活体识别等，本申请实施例对此也不限定。
在实际应用中，由于显示屏中的偏振片和屏幕点阵排列的影响，采集的指纹通常有对角清晰、局部模糊的问题，如图2所示，该模糊区域对于指纹识别的影响较大，严重可能造成指纹识别失败，影响用户体验。
有鉴于此，本申请实施例提出了一种解决方案，通过调整指纹模组中的指纹传感器(对应前述的DIE，即用于进行光检测的部分)和电子设备的显示屏呈一定的角度，能够有效降低偏振片对光信号的影响，同时还可以显著减少或消除莫尔条纹。
下面将结合图3至图6，对本申请实施例中的指纹模组进行描述。
图3是根据本申请一实施例的指纹模组100的示意性结构图，如图3所示，该指纹模组100可以包括指纹传感器110，其中，该指纹传感器110的第一方向11与该指纹模组的第一方向10具有第一夹角θ。
需要说明的是，该指纹传感器110的第一方向11可以为平行于该指纹传感器的特定边111的方向，类似地，该指纹模组100可以为平行于该指纹模组的特定边101的方向。
在一具体的实施例中，若该指纹传感器和该指纹模组为长方形，该指纹模组或该指纹传感器的特定边可以为长方形中的长边，则该指纹模组或该指纹传感器的第一方向可以为平行于该指纹模组或该指纹传感器的长边的方向。
在其他可选的实现方式中，该指纹模组的第一方向也可以指该指纹模组的其他边、中心轴等作为参考，类似地，对于该指纹传感器的第一方向亦是如此，本申请实施例对此不做限定，只要该指纹传感器相对于该指纹模组的外形具有一定的夹角即可。
应理解，本申请实施例仅为明确表示该指纹传感器在该指纹模组中的位 置关系，引入了特定边的概念，并不表示该指纹模组和该指纹传感器的外形一定为标准的正方形或长方形，当该指纹模组或该指纹传感器为其他不规则形状时，可以以该指纹模组或指纹传感器的中心轴等虚拟的边或轴作为参考，本申请实施例对此不做限定，只要相对于现有的指纹传感器和指纹模组之间的位置关系，该指纹传感器相对于该指纹模组具有一定角度的偏转即可。
因此，现有技术中，该指纹传感器在指纹模组中是平行放置的，或者说，该指纹传感器和该指纹模组的外形是平行的，而在本申请实施例中，该指纹传感器与该指纹模组具有一定的夹角，即该指纹模组和该指纹模组的外形具有一定的夹角，此情况下，能够降低偏振片对指纹图像的干扰，从而指纹模组采集的指纹图像更清晰，能够提升指纹识别的性能。
可选地，在一些实施例中，该指纹传感器与该指纹模组之间的夹角可以是以该指纹传感器的中心为中心旋转该指纹传感器得到的，或者也可以是该指纹传感器以该指纹模组的中心为中心旋转该指纹传感器得到的，或者也可以是以该指纹模组的一角为中心旋转该指纹传感器得到的等，本申请实施例对此不作限定，只要该指纹传感器相对于该指纹模组的外形形成一定的夹角即可。
因此，通过设置该指纹传感器和指纹模组之间具有一定的夹角，这样，当该指纹模组平行安装到电子设备上时，该指纹传感器和该电子设备的显示屏之间相应的也具有一定的夹角，从而能够降低显示屏中的偏振片对光信号的影响，同时降低或消除莫尔条纹，进而能够提升指纹识别的成功率。
可选地，在一些实施例中，该第一夹角θ可以在-45度到45度之间，且不等于零，即-45°≤θ≤45°。
优选地，该第一夹角θ可以在-15度到15度之间，且不等于零，即-15°≤θ≤15°。
可选地，在一些实施例中，所述指纹模组安装于电子设备的显示屏的下方时，所述指纹模组的第一方向和所述显示屏的第一方向平行，其中，所述显示屏的第一方向为与所述显示屏的特定边平行的方向。
应理解，该显示屏的特定边可以是该显示屏的短边，或者说，该电子设备竖直放置时，平行于大地的边。即当该电子设备竖直放置时，该显示屏的第一方向为与大地平行的方向，可以称为该显示屏的水平方向，则该显示屏 的长边的方向为该显示屏的竖直方向。
在具体应用中，可以沿平行于该显示屏的第一方向，将该指纹模组安装于电子设备中的显示屏的下方，这样，该指纹模组的第一方向和该显示屏的第一方向平行，如图4所示，该显示屏的第一方向30和该指纹模组的第一方向10平行。采用本申请实施例的指纹模组100，该指纹模组中的该指纹传感器相对于指纹模组本身已具有一定的角度，因此，在向电子设备中安装该指纹模组时，不必调整指纹模组在电子设备中的安装角度，便于电子设备的安装，同时也可以更好的兼容现有的电子设备的安装工艺。
在一些可选的实施例中，将该指纹模组安装于电子设备的显示屏的下方时，该指纹模组的第一方向和该显示屏的第一方向也可以具有一定的角度，即可以不必平行于显示屏的第一方向安装该指纹模组。例如，可以将指纹模组顺时针旋转α度，安装于显示屏的下方，则该指纹模组的第一方向和该显示屏的第一方向具有夹角α。在该指纹模组中，该指纹传感器第一方向与该指纹模组的第一方向的夹角为θ，则该指纹传感器的第一方向与该显示屏的第一方向的角度为θ+α，此情况下，只要保证该θ+α在上述的角度范围内即可，本申请实施例对于该指纹模组的第一方向和显示屏的第一方向之间的角度不做具体限定。
图5所示为将该指纹模组100平行安装到电子设备的显示屏下时，采集的指纹图像的示意图，在图5所示的示例中，指纹传感器的第一方向和显示屏的第一方向(竖直放置时为水平方向)之间的夹角为15度，从图5可以看出，相对于图2所示的指纹图像，调整角度后的指纹传感器采集的指纹图像的清晰度提高。
从图5可看出，在指纹传感器采集的指纹图像中，平行于或近似平行于显示屏中的偏振片的偏振方向的指纹图像通常较为清晰，垂直于或近似垂直于该偏振方向的指纹图像通常较为模糊，因此，可以根据偏振片的偏振方向设置该指纹传感器与该显示屏之间的角度，以降低显示屏中的偏振片对指纹成像的影响。
应理解，在本申请实施例中，该指纹模组100可以对应于图1中的光学指纹装置730，该指纹传感器110可以对应于图1中的光检测部分734，该电子设备可以对应于该终端设备700，显示屏对应于该显示屏720，因此，该指纹模组100还可以包括该光学指纹装置730中的模块，例如，滤光层 (Filter)、导光层以及其他光学元件等，这里不作赘述。
图6是根据本申请另一实施例的指纹模组的示意性结构图，如图6所示，该指纹模组200包括：指纹传感器210；
其中，所述指纹模组200安装于电子设备300的显示屏310的下方时，所述指纹模组200中的所述指纹传感器210的第一方向21和所述显示屏的第一方向30具有第一夹角，所述指纹传感器的第一方向21为与所述指纹传感器的特定边平行的方向，所述显示屏的第一方向30为与所述显示屏的特定边平行的方向。
应理解，在本实施例中，该指纹传感器的第一方向，该显示屏的第一方向以及该指纹模组的第一方向的含义与前述实施例类似，这里不再赘述。
在该实施例中，该指纹模组200安装于显示屏的下方时，该指纹模组中的指纹传感器相对于该显示屏具有一定的角度，也就是说，相对于现有的指纹传感器和显示屏之间的位置关系，本申请实施例中的指纹传感器和显示屏之间具有一定的偏转角度，该角度可以是该指纹模组相对于该显示屏偏转产生的，或者也可以如前述实施例中所描述的，该角度是制备该指纹模组时，该指纹传感器相对于该指纹模组发生偏转产生的，本申请实施例对此不做限定。
综上，在该实施例中，指纹模组、指纹传感器和显示屏的相对角度可以包括如下几种情况：
情况1：所述指纹模组的第一方向与所述指纹传感器的第一方向平行，所述指纹模组的第一方向与显示屏的第一方向具有第一夹角。
此情况下，该指纹传感器的第一方向和该显示屏的第一方向之间的夹角可以是旋转整个指纹模组产生的。
情况下2：所述指纹模组的第一方向与所述显示屏的第一方向平行，所述指纹模组的第一方向与所述指纹传感器的第一方向具有第一夹角。
此情况下，该指纹传感器的第一方向和该显示屏的第一方向之间的夹角可以是在制备该指纹模组时，旋转该指纹传感器产生的，这样，当沿显示屏的第一方向安装该指纹模组时，该指纹传感器的第一方向与该显示屏的第一方向之间必然具有一定的夹角。
在情况3中，所述指纹模组的第一方向与所述显示屏的第一方向具有一定的角度，所述指纹模组的第一方向与所述指纹传感器的第一方向具有一定 的角度。
此情况下，在制备该指纹模组时，该指纹传感器第一方向与该指纹模组的第一方向具有一定的角度，在安装该指纹模组时，该指纹模组第一方向和该显示屏的第一方向也具有一定的角度，最终只要保证指纹传感器的第一方向和显示屏的第一方向之间的角度在一定的范围内即可。
需要说明的是，在本申请实施例中，指纹传感器和指纹模组具有一定的角度可以指该指纹传感器的第一方向和指纹模组的第一方向具有一定的角度，同理，指纹传感器和显示屏之间的角度可以理解为指纹传感器的第一方向和显示屏的第一方向之间的角度，对于类似描述可做类似的解释，这里不再赘述。
还应理解，当指纹传感器和指纹模组为不规则的形状时，指纹传感器和指纹模组具有一定的角度可以理解为该指纹传感器的安装位置，相对于现有的该指纹模组中的该指纹传感器的安装位置具有一定角度的偏转，例如，可以以该指纹传感器的中心为中心将该指纹传感器旋转特定的角度以形成该指纹传感器和指纹模组之间的夹角。
可选地，在一些实施例中，所述第一夹角在-45度到45度之间，且不等于零。
优选地，所述第一夹角在-15度到15度之间，且不等于零。
因此，通过调整指纹模组中的指纹传感器相对于该指纹模组的角度，或者通过调整指纹模组相对于该显示屏的角度，以使该指纹传感器和显示屏之间具有一定的角度，从而能够降低偏振片对输入到指纹模组中的光信号的影响，同时能够减少或消除莫尔条纹，进而能够提升指纹识别的成功率。
应理解，在本申请实施例中，该指纹模组200可以对应于图1中的光学指纹装置730，该指纹传感器210可以对应于图1中的光检测部分734，该电子设备300可以对应于该终端设备700，显示屏对应于该显示屏720，因此，该指纹模组200还可以包括该光学指纹装置730中的模块，例如，滤光层(Filter)、导光层以及其他光学元件等，这里不作赘述。
图7是根据本申请实施例的电子设备400的示意性结构图，如图7所示，该电子设备400包括：显示屏410；
指纹模组420，包括指纹传感器421，所述指纹模组420设置于所述显示屏410的下方；
其中，所述指纹传感器421的第一方向42和所述显示屏410的第一方向41具有第一夹角，所述指纹传感器的第一方向42为与所述指纹传感器的特定边平行的方向，所述显示屏410的第一方向41为与所述显示屏的特定边平行的方向。
应理解，在该实施例中，该指纹传感器的第一方向，该显示屏的第一方向以及该指纹模组的第一方向的含义与前述实施例类似，这里不再赘述。
在该实施例中，该电子设备中的指纹传感器可以与该电子设备的显示屏具有一定的角度，这样，通过该显示屏产生的指纹图案可以与通过指纹传感器产生的图案之间产生一定的角度，从而能够降低或消除莫尔条纹，同时根据该显示屏中的偏振片的偏振方向设置该指纹传感器和显示屏之间的角度，有利于降低偏振片对输入到指纹模组中的光信号的影响，进而能够提升指纹识别的成功率。
可选地，在一些实施例中，所述第一夹角在-45度到45度之间，且不等于零。
优选地，所述第一夹角在-15度到15度之间，且不等于零。
可选地，在一些实施例中，该显示屏可以为OLED屏或液晶显示(Liquid Crystal Display)屏。
可选地，在一些实施例中，指纹模组、指纹传感器和显示屏的相对角度也可以为前述的情况1～情况3，这里不再赘述。
图8为情况1中的电子设备400的定向视图。图9是图8所示的电子设备400沿U-U的部分剖面结构示意图。图10为情况2中的电子设备400的定向视图。图11是图10所示的电子设备400沿U-U的部分剖面结构示意图。
在图8中，所述指纹模组420的第一方向与所述指纹传感器421的第一方向平行，所述指纹模组420的第一方向与所述显示屏的第一方向(当电子设备竖直放置时，为水平方向)具有一定的夹角。
对于图8所示的电子设备而言，该电子设备中的指纹模组的制备过程可以采用现有的制备过程，而电子设备的制备过程与现有的电子设备的制备过程不同，为了使得该指纹模组中的指纹传感器和该显示屏具有一定的角度，将该指纹模组安装于该电子设备的显示屏下方的中框中时，需要旋转整个指纹模组，以使该指纹模组中的指纹传感器和该显示屏之间的夹角在特定范围内。在该实施例中，由于需要在中框中对指纹模组做旋转操作，因此，需要 为指纹模组预留足够的空间。
在图10中，所述指纹模组420的第一方向与所述显示屏的第一方向平行，所述指纹模组420的第一方向与所述指纹传感器421的第一方向(当电子设备竖直放置时，为水平方向)具有一定的夹角。
对于图10所示的电子设备而言，电子设备的制备过程可以采用现有的制备过程，而该指纹模组的制备过程与现有的制备过程不同，为了使得该指纹模组中的指纹传感器和该显示屏具有一定的角度，制备该指纹模组时，可以旋转该指纹传感器以使该指纹模组中的指纹传感器相对于该指纹模组的外形具有一定的角度，这样，沿平行于显示屏的第一方向，将该指纹模组安装于该电子设备的显示屏下方的中框中时，可以使得该指纹模组中的指纹传感器和该显示屏之间具有一定的夹角。
在该实施例中，由于相对于指纹传感器在指纹模组中发生了旋转，因此，需要为旋转该指纹传感器预留足够的空间。
如图9和图11所示，该电子设备中还包括其他部件，例如，软性电路板(Flexible Printed Circuit，FPC)440、支架450、泡棉460和中框470等。
具体地，所述泡棉460设置于支架450的上表面，所述泡棉460可以用于密封防尘。中框470为电子设备的设置于显示屏410和后盖中间并用于承载内部各种组件的框架，其内部各种组件包括但不限于电池，主板，摄像头，排线，各种感应器，话筒，听筒等等零部件。
指纹传感器421可以通过焊盘焊接到FPC 440，并通过所述FPC 440实现与其他外围电路或者如图6或图7所示的电子设备的其他元件的电性互连和信号传输。比如，所述指纹传感器可以通过所述FPC 440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 440将所述指纹传感器421采集的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。
以上，结合图3至图11，详细说明了根据本申请的装置实施例，以下，结合图12和图13，说明根据本申请的方法实施例，应理解，方向实施例和装置实施例相互对应，相似描述可以参考前述的装置实施例，这里不再赘述。
应理解，以下所示出的指纹模组和电子设备的制备方法仅为用于实现本申请实施例的指纹模组和电子设备的可能的实现方式，而不应对本申请构成任何限定，本申请实施例也可以采用其他制备方法制备上述结构。
还应理解，图12和图13示出了本申请实施例的指纹模组和电子设备的 制备方法的步骤或操作仅是示例，本申请实施例还可以执行其它操作或者图12和图13的各种操作的变形。此外，图12和图13中的各个步骤可以分别按照与图12和图13所呈现的不同的顺序来执行，并且有可能并非要执行图12和图13中的全部操作。
图12是根据本申请实施例的指纹模组的制备方法500的示意性流程图。如图12所示，该方法500包括如下内容：
S510，沿与所述指纹模组的第一方向成第一夹角的方向，将指纹传感器安装于所述指纹模组中，以使所述指纹传感器的第一方向和所述指纹模组的第一方向具有第一夹角，其中，所述指纹模组的第一方向为与所述指纹模组的特定边平行的方向，所述指纹传感器的第一方向为与所述指纹传感器的特定边平行的方向。
可选地，在一些实施例中，所述第一夹角在-15度到15度之间，且不等于零。
可选地，在一些实施例中，所述第一夹角在-45度到45度之间，且不等于零。
可选地，在一些实施例中，所述指纹模组安装于电子设备的显示屏的下方时，所述指纹模组的第一方向和所述显示屏的第一方向平行，其中，所述显示屏的第一方向为与所述显示屏的特定边平行的方向。
可选地，在一些实施例中，所述第一夹角是根据所述显示屏中的偏振片的偏振方向确定的。
图13是根据本申请实施例的电子设备的制备方法600的示意性流程图。如图13所示，该方法600包括如下内容：
S610，将指纹模组安装于所述电子设备的显示屏的下方，以使所述指纹模组中的指纹传感器的第一方向与所述显示屏的第一方向具有所述第一夹角，所述指纹传感器的第一方向为与所述指纹传感器的特定边平行的方向，所述显示屏的第一方向为与所述显示屏的特定边平行的方向。
可选地，在一些实施例中，所述指纹模组的第一方向与所述显示屏的第一方向平行，所述指纹模组的第一方向和所述指纹传感器的第一方向具有所述第一夹角，其中，所述指纹模组的第一方向为与所述指纹模组的特定边平行的方向。对应于前述的情况2，具体执行过程这里不再赘述。
可选地，在一些实施例中，所述指纹模组的第一方向与所述指纹传感器 的第一方向平行，所述指纹模组的第一方向与所述显示屏的第一方向具有所述第一夹角，其中，所述指纹模组的第一方向为与所述指纹模组的特定边平行的方向。对应于前述的情况1，具体执行过程这里不再赘述。
可选地，在一些实施例中，所述第一夹角在-45度到45度之间，且不等于零。
可选地，在一些实施例中，所述第一夹角在-15度到15度之间，且不等于零。
可选地，在一些实施例中，所述第一夹角是根据所述显示屏中的偏振片的偏振方向确定的。
应理解，上述列举的制备方法的各实施例，可以通过机器人或者数控加工等方式来执行，用于执行上述制备方法的设备软件或工艺可以通过执行保存在存储器中的计算机程序代码来执行上述制备方法。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
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及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。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。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
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、装置和方法，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。另一点，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，可以是电性，机械或其它的形式。
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，也可以两个或两个以上单元集成在一个单元中。
所述功能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(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、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，可轻易想到变化或替换，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所述以权利要求的保护范围为准。

Claims (28)

  1. 一种指纹模组，其特征在于，包括：
    指纹传感器，其中，所述指纹模组的第一方向与所述指纹传感器的第一方向具有第一夹角，所述指纹模组的第一方向为与所述指纹模组的特定边平行的方向，所述指纹传感器的第一方向为与所述指纹传感器的特定边平行的方向。
  2. 根据权利要求1所述的指纹模组，其特征在于，所述第一夹角在-15度到15度之间，且不等于零。
  3. 根据权利要求1所述的指纹模组，其特征在于，所述第一夹角在-45度到45度之间，且不等于零。
  4. 根据权利要求1至3中任一项所述的指纹模组，其特征在于，所述指纹模组安装于电子设备的显示屏的下方时，所述指纹模组的第一方向和所述显示屏的第一方向平行，其中，所述显示屏的第一方向为与所述显示屏的特定边平行的方向。
  5. 根据权利要求4所述的指纹模组，其特征在于，所述第一夹角是根据所述显示屏中的偏振片的偏振方向确定的。
  6. 一种指纹模组，其特征在于，包括：
    指纹传感器；
    其中，所述指纹模组安装于电子设备的显示屏的下方时，所述指纹模组中的所述指纹传感器的第一方向和所述显示屏的第一方向具有第一夹角，所述指纹传感器的第一方向为与所述指纹传感器的特定边平行的方向，所述显示屏的第一方向为与所述显示屏的特定边平行的方向。
  7. 根据权利要求6所述的指纹模组，其特征在于，所述指纹模组的第一方向与所述指纹传感器的第一方向平行，其中，所述指纹模组的第一方向为与所述指纹模组的特定边平行的方向。
  8. 根据权利要求6所述的指纹模组，其特征在于，所述指纹模组的第一方向与所述显示屏的第一方向平行，其中，所述指纹模组的第一方向为与所述指纹模组的特定边平行的方向。
  9. 根据权利要求6至8中任一项所述的指纹模组，其特征在于，所述第一夹角在-45度到45度之间，且不等于零。
  10. 根据权利要求6至8中任一项所述的指纹模组，其特征在于，所述 第一夹角在-15度到15度之间，且不等于零。
  11. 根据权利要求6至10中任一项所述的指纹模组，其特征在于，所述第一夹角是根据所述显示屏中的偏振片的偏振方向确定的。
  12. 一种电子设备，其特征在于，包括：
    显示屏；
    指纹模组，包括指纹传感器，所述指纹模组设置于所述显示屏的下方；
    其中，所述指纹传感器的第一方向和所述显示屏的第一方向具有第一夹角，所述指纹传感器的第一方向为与所述指纹传感器的特定边平行的方向，所述显示屏的第一方向为与所述显示屏的特定边平行的方向。
  13. 根据权利要求12所述的电子设备，其特征在于，所述指纹模组的第一方向与所述显示屏的第一方向平行，所述指纹模组的第一方向和所述指纹传感器的第一方向具有所述第一夹角，其中，所述指纹模组的第一方向为与所述指纹模组的特定边平行的方向。
  14. 根据权利要求12所述的电子设备，其特征在于，所述指纹模组的第一方向与所述指纹传感器的第一方向平行，所述指纹模组的第一方向与所述显示屏的第一方向具有所述第一夹角，其中，所述指纹模组的第一方向为与所述指纹模组的特定边平行的方向。
  15. 根据权利要求12至14中任一项所述的电子设备，其特征在于，所述第一夹角在-45度到45度之间，且不等于零。
  16. 根据权利要求12至15中任一项所述的电子设备，其特征在于，所述第一夹角在-15度到15度之间，且不等于零。
  17. 根据权利要求12至16中任一项所述的电子设备，其特征在于，所述第一夹角是根据所述显示屏中的偏振片的偏振方向确定的。
  18. 一种指纹模组的制备方法，其特征在于，包括：
    沿与所述指纹模组的第一方向成第一夹角的方向，将所述指纹传感器安装于所述指纹模组中，以使所述指纹传感器的第一方向和所述指纹模组的第一方向具有第一夹角，其中，所述指纹模组的第一方向为与所述指纹模组的特定边平行的方向，所述指纹传感器的第一方向为与所述指纹传感器的特定边平行的方向。
  19. 根据权利要求18所述的制备方法，其特征在于，所述第一夹角在-15度到15度之间，且不等于零。
  20. 根据权利要求18所述的制备方法，其特征在于，所述第一夹角在-45度到45度之间，且不等于零。
  21. 根据权利要求18至20中任一项所述的制备方法，其特征在于，所述指纹模组安装于电子设备的显示屏的下方时，所述指纹模组的第一方向和所述显示屏的第一方向平行，其中，所述显示屏的第一方向为与所述显示屏的特定边平行的方向。
  22. 根据权利要求18至21中任一项所述的制备方法，其特征在于，所述第一夹角是根据所述显示屏中的偏振片的偏振方向确定的。
  23. 一种电子设备的制备方法，其特征在于，包括：
    将指纹模组安装于所述电子设备的显示屏的下方，以使所述指纹模组中的指纹传感器的第一方向与所述显示屏的第一方向具有第一夹角，所述指纹传感器的第一方向为与所述指纹传感器的特定边平行的方向，所述显示屏的第一方向为与所述显示屏的特定边平行的方向。
  24. 根据权利要求23所述的制备方法，其特征在于，所述指纹模组的第一方向与所述显示屏的第一方向平行，所述指纹模组的第一方向和所述指纹传感器的第一方向具有所述第一夹角，其中，所述指纹模组的第一方向为与所述指纹模组的特定边平行的方向。
  25. 根据权利要求23所述的制备方法，其特征在于，所述指纹模组的第一方向与所述指纹传感器的第一方向平行，所述指纹模组的第一方向与所述显示屏的第一方向具有所述第一夹角，其中，所述指纹模组的第一方向为与所述指纹模组的特定边平行的方向。
  26. 根据权利要求23至25中任一项所述的制备方法，其特征在于，所述第一夹角在-45度到45度之间，且不等于零。
  27. 根据权利要求23至25中任一项所述的制备方法，其特征在于，所述第一夹角在-15度到15度之间，且不等于零。
  28. 根据权利要求23至27中任一项所述的制备方法，其特征在于，所述第一夹角是根据所述显示屏中的偏振片的偏振方向确定的。
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