WO2022100502A1 - 一种电子设备 - Google Patents

一种电子设备 Download PDF

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Publication number
WO2022100502A1
WO2022100502A1 PCT/CN2021/128596 CN2021128596W WO2022100502A1 WO 2022100502 A1 WO2022100502 A1 WO 2022100502A1 CN 2021128596 W CN2021128596 W CN 2021128596W WO 2022100502 A1 WO2022100502 A1 WO 2022100502A1
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WO
WIPO (PCT)
Prior art keywords
light
fingerprint
photoelectric conversion
fingerprint identification
conversion chip
Prior art date
Application number
PCT/CN2021/128596
Other languages
English (en)
French (fr)
Inventor
周一丹
卢曰万
董辰
郜文美
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP21891029.7A priority Critical patent/EP4224363A4/en
Priority to US18/252,644 priority patent/US20240014246A1/en
Publication of WO2022100502A1 publication Critical patent/WO2022100502A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
    • H01L27/144—Devices controlled by radiation
    • H01L27/146—Imager structures
    • H01L27/14678—Contact-type imagers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
    • 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
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/12—Details of acquisition arrangements; Constructional details thereof
    • G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/147—Details of sensors, e.g. sensor lenses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/90—Arrangement of cameras or camera modules, e.g. multiple cameras in TV studios or sports stadiums

Definitions

  • the present application belongs to the field of display technology, and more particularly relates to an electronic device.
  • the fingerprint recognition under the screen mainly uses the reflection principle of light.
  • the light emitted by the fingerprint recognition light source illuminates the entire surface of the finger.
  • the light is reflected by the finger and then enters the screen again, and finally hits the photoelectric conversion below the screen.
  • the photoelectric conversion component collects the fingerprint image and realizes the fingerprint recognition.
  • the current under-screen optical fingerprint recognition solution still has the problem that the accuracy of fingerprint recognition is low, which affects the user experience.
  • the present application provides an electronic device to solve the technical problem of low fingerprint recognition accuracy in the prior art.
  • An embodiment of the present application provides an electronic device, the electronic device includes a display panel, a camera, a fingerprint recognition light source, and a light turning element; the display panel includes a first display area and a second display area, and the light transmittance of the first display area is greater than that of the second display area.
  • the transmittance of the display area, the second display area includes a fingerprint identification area;
  • the camera, the fingerprint recognition light source and the light turning element are all located on the side of the display panel away from the light emitting surface; wherein,
  • the camera includes a photoelectric conversion chip, and the camera is arranged on the side of the first display area away from the light-emitting surface thereof;
  • the fingerprint identification light source is used to direct light to the fingerprint identification area during the fingerprint identification stage;
  • the light turning element is used to transmit the light reflected by the touch subject pressing the fingerprint identification area to the photoelectric conversion chip in the fingerprint identification stage.
  • the camera is arranged on the side of the first display area away from the light emitting surface thereof, so as to realize the solution of the camera under the screen.
  • a light turning element is arranged below the display panel, and the light turning element can transmit the light reflected by the touch body in the fingerprint identification area to the photoelectric conversion chip of the camera.
  • the photoelectric conversion chip in the camera can receive the fingerprint detection light used for fingerprint identification, so that the photoelectric conversion chip in the camera can be used to collect fingerprint image information, thereby realizing fingerprint identification.
  • the photoelectric conversion chip in the camera has high imaging quality and precision, which can improve the accuracy of fingerprint recognition.
  • the photoelectric conversion chip in the camera can be applied in the stage of invoking the camera for shooting and the stage of fingerprint identification, which improves the hardware integration. There is no need to additionally provide a photoelectric conversion chip for fingerprint identification, which can reduce costs.
  • the electronic device further includes a fingerprint processing module, a photographing processing module and a switching control module;
  • the switching control module is used to control the fingerprint processing module to be electrically connected with the photoelectric conversion chip in response to the electronic device working in the fingerprint identification stage;
  • the switching control module also It is used to control the photographing processing module to be electrically connected to the photoelectric conversion chip in response to the electronic device working in the stage of invoking the camera for photographing;
  • the fingerprint processing module is used to receive the image information obtained by the photoelectric conversion chip after receiving light, and perform fingerprint identification;
  • photographing processing The module is used to receive the image information obtained by the photoelectric conversion chip after receiving light, and to image the photographed object.
  • the switching control module is connected to the application processor chip of the electronic device, and the application processor chip sends a control signal to it.
  • the switching control module determines the working state of the electronic device according to the received control chip, and then according to the electronic device The working state controls the fingerprint processing module to be electrically connected to the photoelectric conversion chip, or controls the photographing processing module to be electrically connected to the photoelectric conversion chip. In order to realize the application of photoelectric conversion chip in different working states of electronic equipment.
  • the fingerprint processing module includes an acquisition unit and a processor; wherein, the acquisition unit is used to obtain a first image according to the optical signal collected by the photoelectric conversion chip during a fingerprint identification process: when the fingerprint identification light source is turned on , and send the first image to the processor, where the first image includes fingerprint image information and background image information; when the fingerprint identification light source is turned off, the second image is obtained according to the optical signal collected by the photoelectric conversion chip, and the second image is sent to a processor, where the second image includes background image information; the processor is used for performing differential processing on the first image and the second image to obtain a fingerprint image.
  • the fingerprint identification light source When a fingerprint identification is performed, the fingerprint identification light source is controlled to be turned on and off once.
  • the fingerprint recognition light source When the fingerprint recognition light source is turned on, the photoelectric conversion chip receives the fingerprint detection light transmitted to the photoelectric conversion chip through the light redirecting element and the ambient light that penetrates the first display area and is directed to the photoelectric conversion chip, then the image collected by the photoelectric conversion chip
  • the information includes fingerprint image information and background image information.
  • the fingerprint identification light source When the fingerprint identification light source is turned off, the photoelectric conversion chip only receives ambient light that penetrates the first display area and then is directed to the photoelectric conversion chip, and the image signal collected by the photoelectric conversion chip only includes background image information.
  • the fingerprint image is obtained by performing differential processing on the first image and the second image, so that the interference of ambient light on fingerprint detection can be eliminated, and the fingerprint recognition accuracy can be improved.
  • the camera further includes a lens group, and the lens group is located on the side of the photoelectric conversion chip close to the display panel.
  • the lens group has a certain light-gathering effect, and the fingerprint detection light emitted by the light turning element can be concentrated on the photoelectric conversion chip after the action of the lens group, reducing light loss and ensuring the utilization of light.
  • the light turning element and the lens group are dislocated.
  • the light redirecting element is prevented from blocking the light that is directed to the camera after penetrating the first display area, so as to ensure that the imaging performance is not affected.
  • the light redirecting element is located between the fingerprint identification area and the first display area.
  • the light redirecting element includes a light incident side and a light exit side, the light incident side is close to the fingerprint identification area, and the light exit side is close to the camera, so as to ensure that the light reflected by the touch subject in the fingerprint identification area during the fingerprint identification stage can enter the light redirecting element, and The light is transmitted to the photoelectric conversion chip in the camera through the action of the light turning element.
  • the light redirecting element includes a first reflection part and a second reflection part arranged opposite to each other, the opposite surfaces of the first reflection part and the second reflection part are both reflection surfaces, and the second reflection part is located in the first reflection part the side away from the display panel, and there is a certain distance between the reflection surface of the first reflection part and the reflection surface of the second reflection part.
  • the medium spaced between the first reflection part and the second reflection part is air.
  • the second reflection part extends out of the edge of the first reflection part; thus, the reflection surface of the second reflection part can easily receive the light reflected by the touch body in the fingerprint identification area, and ensure that the light reflected by the touch body is ensured.
  • the fingerprint detection light used for fingerprint identification can all be injected into the light turning element to reduce the loss of fingerprint detection light.
  • the first reflection part extends beyond the edge of the second reflection part, so as to ensure that the light can be directed to the photoelectric conversion chip after being acted by the light redirecting element, and the transmission efficiency of the light redirecting element to the fingerprint detection light is improved.
  • the light turning element is an optical waveguide
  • the optical waveguide includes a light incident surface and a light exit surface, wherein the light entrance surface is located at one end close to the fingerprint identification area, and the light entrance surface faces the fingerprint identification area; the light exit surface is located at the end of the fingerprint identification area. It is close to one end of the first display area, and the light emitting surface faces the photoelectric conversion chip.
  • the optical waveguide is more stable in structure, the performance of the optical waveguide to transmit light is more reliable, and the light loss of the light transmitted in the optical waveguide is small, so as to ensure that the light quantity of the fingerprint detection light received by the photoelectric conversion chip is sufficient. large, thus ensuring the accuracy of fingerprint detection.
  • the display panel includes a substrate substrate and a light-emitting device layer, the light-emitting device layer is located on the side of the substrate substrate away from the camera, wherein the light-emitting device layer includes a plurality of light-emitting devices; the density of the light-emitting devices in the first display area is smaller than that of the first display area. 2.
  • the density of light-emitting devices in the display area is improved by reducing the arrangement density of the light-emitting devices in the first display area, thereby ensuring the imaging effect when the camera is called for shooting.
  • the electronic device provided by the present application has the following beneficial effects: a light turning element is provided on the side of the display panel away from the light emitting surface, and the light turning element can transmit the light reflected by the touch body in the fingerprint identification area to the photoelectric conversion chip of the camera.
  • the photoelectric conversion chip in the camera can receive the fingerprint detection light used for fingerprint identification, so that the photoelectric conversion chip of the camera is used to collect fingerprint image information, thereby realizing fingerprint identification.
  • the photoelectric conversion chip in the camera of the embodiment of the present application can be applied in the stage of invoking the camera for shooting and the stage of fingerprint identification, which improves the hardware integration. There is no need to additionally provide a photoelectric conversion chip for fingerprint identification, which can reduce costs.
  • the photoelectric conversion chip in the camera has high imaging quality and precision, which can improve the accuracy of fingerprint recognition.
  • FIG. 1 is a schematic diagram of an under-screen fingerprint identification scheme in the related art
  • FIG. 2 is a schematic top view of an electronic device provided by an embodiment of the present application.
  • Fig. 3 is a schematic cross-sectional view at the position of tangent line A-A' in Fig. 2;
  • Fig. 4 is another schematic cross-sectional view at the position of tangent line B-B' in Fig. 2;
  • FIG. 5 is another schematic top view of the electronic device provided by the embodiment of the present application.
  • Fig. 6 is another schematic cross-sectional view at the position of tangent line A-A' in Fig. 2;
  • Fig. 7 is another schematic cross-sectional view at the position of tangent line A-A' in Fig. 2;
  • FIG. 8 is a flowchart of a fingerprint identification method provided by an embodiment of the present application.
  • FIG. 9 is a workflow diagram of a fingerprint identification of an electronic device provided by an embodiment of the present application.
  • FIG. 10 is a modular schematic diagram of an electronic device provided by an embodiment of the present application.
  • FIG. 1 is a schematic diagram of an under-screen fingerprint identification solution.
  • a fingerprint photoelectric conversion chip 20 and a fingerprint identification light source 30 are arranged below the display area of the display panel 10.
  • the fingerprint identification light source 30 When a finger is pressed on the fingerprint identification area, the fingerprint identification light source 30 The emitted light penetrates the display panel 10 and is reflected by the finger, and the light reflected by the finger penetrates the display panel 10 again and is received by the fingerprint photoelectric conversion chip 20 .
  • the valleys and ridges of the fingerprint can both reflect the light, and the amount of light reflected by the valleys of the fingerprint is different from the amount of light reflected by the ridges, then the fingerprint photoelectric conversion chip The amount of signal generated by the photosensitive device in 20 after receiving the light reflected by the valley or ridge of the fingerprint is different.
  • the valleys and ridges of the fingerprint are identified according to the magnitude of the signals generated by the plurality of photosensitive devices, thereby forming a fingerprint image.
  • a corresponding fingerprint photoelectric conversion chip needs to be arranged to receive the light reflected by the fingerprint.
  • the fingerprint photoelectric conversion chip is arranged on the back side of the display panel.
  • the light used for fingerprint identification needs to penetrate the display panel twice before it can be received by the fingerprint photoelectric conversion chip, and the light transmittance of the display panel is limited, so the amount of light that can be received by the fingerprint photoelectric conversion chip limited.
  • the photosensitive performance and accuracy of the fingerprint photoelectric conversion chip become the main factors affecting the accuracy of fingerprint recognition.
  • an embodiment of the present application provides an electronic device, the electronic device includes an under-screen camera, and a photoelectric conversion chip in the under-screen camera is used to receive fingerprint detection light, thereby realizing fingerprint recognition.
  • the photoelectric conversion chip in the camera will have higher imaging quality and accuracy, thereby improving the accuracy of fingerprint recognition.
  • FIG. 2 is a schematic top view of an electronic device provided by an embodiment of the present application.
  • FIG. 3 is a schematic cross-sectional view at the position of the tangent line A-A' in FIG. 2 .
  • the electronic device includes a display panel 101 , a camera 102 , a fingerprint recognition light source 103 and a light turning element 104 .
  • the display panel 101 includes a display area 1 and a non-display area 2 , and the non-display area 2 is arranged around the display area 1 .
  • the display area 1 includes a first display area 11 and a second display area 12.
  • the light transmittance of the first display area 11 is greater than that of the second display area 12.
  • the light transmittance here is understood as the light transmittance per unit area. Rate.
  • the second display area 12 includes a fingerprint identification area 121 .
  • FIG. 3 also illustrates a protective cover plate 105 in the electronic device. The protective cover plate 105 is used to protect the display panel 101 .
  • the camera 102 , the fingerprint recognition light source 103 and the light turning element 104 are all located on the back side of the display panel 101 ;
  • the camera 102 is disposed on the side of the first display area 11 away from the light emitting surface thereof.
  • the camera includes a photoelectric conversion chip 1021 and a lens group 1022 (shown schematically in the figure), and the lens group 1022 is located on the side of the photoelectric conversion chip 1021 close to the display panel 101 .
  • Lens group 1022 includes one or more lenses.
  • the lens group 1022 includes a plurality of stacked lenses, and different lens groups have different functions.
  • the lens group includes a focusing lens group, a zoom lens group, a compensation lens group, and the like.
  • the photoelectric conversion chip 1021 is a complementary metal oxide semiconductor (Complementary Metal Oxide Semiconductor, CMOS) chip, and the photoelectric conversion chip 1021 includes a plurality of photosensitive devices arranged in an array.
  • the photosensitive device has a photoelectric conversion function, and is used to convert optical signals into electrical signals after receiving light.
  • the camera 102 is arranged on the side of the first display area 11 away from the light-emitting surface thereof, that is, the camera 102 is arranged below the display area 1, so as to realize the under-screen camera solution, which can increase the screen ratio.
  • the camera 102 is used as a front camera.
  • the first display area 11 when the camera is not called, the first display area 11 can display images normally; when the camera needs to be called, the first display area 11 can be controlled not to display, and ambient light penetrates the first display area 11.
  • the display area 11 is then received by the photoelectric conversion chip 1021 in the camera 102, and the photoelectric conversion chip 1021 collects image information and then performs imaging. Setting the transmittance of the first display area 11 to be greater than that of the second display area 12 ensures that the camera 102 can receive enough ambient light in applications and ensures the imaging quality of the camera 102 .
  • the fingerprint identification light source 103 When the electronic device is working in the fingerprint identification stage, when a touch subject (such as a user's finger) is sensed to touch or press the fingerprint identification area 121, the fingerprint identification light source 103 is controlled to be turned on.
  • the user's operation on the fingerprint identification area can be sensed by setting a pressure sensor.
  • the user's finger touches or presses, or when the user's finger is placed on the fingerprint identification area the user's finger will exert a certain force on the display panel, and the pressure sensor passes through the fingerprint identification area. This force is sensed to judge the user's operation on the fingerprint area.
  • the fingerprint identification light source 103 After the fingerprint identification light source 103 is turned on, the light emitted by the fingerprint identification light source 103 is directed to the fingerprint identification area 121 , and the fingerprint identification area 121 can be illuminated by the light emitted by the fingerprint identification light source 103 .
  • the fingerprint identification detection is performed in the locked screen state or in other application scenarios
  • the fingerprint identification light source 103 after the fingerprint identification light source 103 is turned on, the light emitted by the fingerprint identification light source 103 to the fingerprint identification area 121 can be reflected by the user's finger, and reflected by the valleys and ridges of the fingerprint of the finger. If the amount of light is different, the amount of signal generated by the photosensitive device in the photoelectric conversion chip 1021 after receiving the light reflected by the valley or ridge of the fingerprint is different.
  • the valleys and ridges of the fingerprint are identified according to the difference in the amount of signals generated by multiple photosensitive devices, and then a fingerprint image is formed to complete the fingerprint identification and detection.
  • the relative positions of the fingerprint identification light source 103 and the fingerprint identification area 121 are only schematically shown.
  • the fingerprint identification light source 103 may be located directly below the fingerprint identification area 121 .
  • the fingerprint identification light source 103 and the fingerprint identification area 121 are dislocated, that is, when the electronic device is viewed from a top view, the fingerprint identification light source 103 is located obliquely below the fingerprint identification area.
  • the relative positions of the fingerprint identification light source 103 and the fingerprint identification area 121 can be reasonably designed according to specific design requirements, and at the same time, the design of the light emitting angle of the fingerprint identification light source 103 can be combined to ensure the light emitted by the fingerprint identification light source 103. It can be directed to the fingerprint identification area 121, so that when the user's finger touches or presses the fingerprint identification area 121 in the fingerprint identification stage, the light can be irradiated on the user's finger.
  • the light redirecting element 104 is used to transmit the light reflected by the touch subject pressing the fingerprint identification area 121 to the photoelectric conversion chip 1021 in the fingerprint identification stage.
  • the fingerprint identification stage after the fingerprint identification light source 103 is turned on, the light emitted by the fingerprint identification light source 103 is directed to the fingerprint identification area 121 , and the light penetrates the display panel 101 and is touched by the touch subject of the fingerprint identification area 121 . M is reflected back into the display panel 101 again. Through the action of the light turning element 104 , the light reflected by the touch body M is transmitted to the photoelectric conversion chip 1021 , so that the photoelectric conversion chip 1021 in the camera 102 is used to collect fingerprint image information.
  • the photoelectric conversion chip 1021 sends the fingerprint image information to the fingerprint processing module, and the fingerprint processing module processes the fingerprint image signal, thereby realizing fingerprint identification. That is, the photoelectric conversion chip in the camera in the embodiment of the present application can obtain image information of the photographed object when the camera is called, and the photoelectric conversion chip in the camera can also be used in the fingerprint recognition function to obtain fingerprint image information.
  • the photoelectric conversion chip is used for, when the electronic device works in the fingerprint identification stage, to receive the fingerprint detection light transmitted to it through the light redirecting element, to obtain the fingerprint image information by collecting the optical signal;
  • the photoelectric conversion chip is also used for receiving the light emitted by the photographed object when the electronic device works in the stage of invoking the camera to photograph, so as to collect the light signal to obtain the image information of the photographed object.
  • the photographed object will reflect or scatter ambient light, and when the camera is called to photograph, the light reflected or scattered by the surface of the photographed object penetrates the first display area and is received by the photoelectric conversion chip.
  • the photographed object is equivalent to a light source, and the light emitted by the photographed object is understood as the light reflected or scattered on the surface of the photographed object.
  • the electronic device includes a fingerprint processing module, a photographing processing module, and a switching control module.
  • the switching control module is used to control the fingerprint processing module to be electrically connected with the photoelectric conversion chip in response to the electronic device working in the fingerprint identification stage, the fingerprint processing module receives the optical signal collected by the photoelectric conversion chip, and then processes the optical signal to obtain a fingerprint image information.
  • the switching control module is also used to control the photographing processing module to be electrically connected with the photoelectric conversion chip in response to the electronic device working in the stage of invoking the camera for photographing, and the photographing processing module receives the optical signal collected by the photoelectric conversion chip, and performs processing to obtain the image of the photographed object. image information.
  • the switching control module is connected to the application processor chip of the electronic device, and the application processor chip sends a control signal to it.
  • the switching control module determines the working state of the electronic device according to the received control chip, and then according to the electronic device The working state controls the fingerprint processing module to be electrically connected to the photoelectric conversion chip, or controls the photographing processing module to be electrically connected to the photoelectric conversion chip. In order to realize the application of photoelectric conversion chip in different working states of electronic equipment.
  • the light transmittance of the first display area in the display area is greater than that of the second display area, and the camera is arranged below the first display area, so as to realize the under-screen camera solution, which can improve the screen ratio.
  • a light turning element is arranged below the display panel, and the light turning element can transmit the light reflected by the touch body in the fingerprint identification area to the photoelectric conversion chip of the camera. That is, in the fingerprint identification stage, the photoelectric conversion chip in the camera can receive the fingerprint detection light used for fingerprint identification, so that the photoelectric conversion chip in the camera is used to collect fingerprint image information, thereby realizing fingerprint identification.
  • the photoelectric conversion chip in the camera can be respectively applied in the stage of invoking the camera for shooting and the stage of fingerprint identification, which improves the hardware integration. There is no need to additionally provide a photoelectric conversion chip for fingerprint identification, which can reduce costs. Moreover, the photoelectric conversion chip in the camera has high imaging quality and precision, which can improve the accuracy of fingerprint recognition.
  • the light redirecting element 104 is disposed on the side of the display panel 101 away from the light-emitting surface. It can be seen from the top view of FIG. 2 that the light redirecting element 104 is located between the fingerprint identification area 121 and the camera 102 .
  • the camera 102 is located below the first display area 11 , that is, the light redirecting element 104 is located between the fingerprint identification area 121 and the first display area 11 .
  • the light turning element 104 includes a light incident side (not shown) and a light exit side (not shown), the light incident side is close to the fingerprint identification area 121 , and the light exit side is close to the camera 102 . Therefore, it is ensured that the light reflected by the touch body in the fingerprint identification area can enter the light redirecting element in the fingerprint identification stage, and the light is transmitted to the photoelectric conversion chip in the camera through the function of the light redirecting element.
  • the camera 102 further includes a lens group 1022 .
  • the light emitted by the fingerprint identification light source 103 is directed to the fingerprint identification area 121, and the light reflected by the touch body M in the fingerprint identification area 121 enters the light redirecting element 104, and the light penetrates after passing through the light redirecting element 104.
  • the lens group 1022 is then irradiated on the photoelectric conversion chip 1021 .
  • the lens group 1022 in the camera 102 has the function of concentrating light, and the fingerprint detection light emitted by the light turning element 104 can be concentrated on the photoelectric conversion chip after the action of the lens group 1022, so as to reduce the light loss and ensure the utilization rate of light. .
  • the light redirecting element 104 and the lens group 1022 are dislocated. It is ensured that in the fingerprint identification stage, the fingerprint detection light after being acted by the light turning element 104 can be irradiated on the photoelectric conversion chip 1021 by the action of the lens group 1022 . At the same time, the light redirecting element 104 is prevented from blocking the light that penetrates the first display area 11 and is directed to the camera 102, so as to ensure that the imaging performance is not affected when the camera is called for shooting.
  • the edge of the light redirecting element is flush with the edge of the lens group.
  • the light redirecting element is close enough to the camera, and most of the fingerprint detection light after being acted by the light redirecting element can be irradiated on the photoelectric conversion chip after being acted by the lens group, so as to ensure the accuracy of fingerprint identification and detection.
  • the setting of the light redirecting element will not affect the imaging performance when the camera is called for shooting.
  • the display panel in the electronic device provided by the embodiment of the present application is an organic light-emitting display panel
  • FIG. 4 is another schematic cross-sectional view at the position of the tangent line B-B' in FIG. 2 .
  • the display panel 101 includes a base substrate 21 , and an array layer 22 , a light emitting device layer 23 and an encapsulation layer 24 on the base substrate 21 .
  • the light emitting device layer 23 includes a plurality of light emitting devices 40 including an anode 41 , a light emitting layer 42 and a cathode 43 stacked in sequence.
  • the anode 41 is a metal reflective electrode
  • the cathode 43 is a transparent electrode.
  • the light emitting device layer 23 further includes a pixel defining layer 50 for spacing adjacent light emitting devices 40 .
  • the array layer 22 includes a pixel circuit 221, and the pixel circuit 221 is used to drive the light-emitting device 40 to emit light. Only one transistor T in the pixel circuit 221 is shown in FIG. 4 .
  • the encapsulation layer 24 is used to protect the light-emitting device 40 in the light-emitting device layer 23 to isolate water and oxygen, so as to ensure the service life of the light-emitting device 40 .
  • the encapsulation layer is thin film encapsulation, including at least one inorganic encapsulation layer and at least one organic encapsulation layer.
  • the encapsulation layer is a rigid package, and the encapsulation layer includes an encapsulation cover plate, and the encapsulation cover plate is bonded and fixed to the array layer by a frame sealant.
  • the display panel 101 further includes a touch module, and the touch module is located on a side of the encapsulation layer away from the display layer, so that the touch function of the electronic device can be realized.
  • the light transmittance of the first display area of the display panel is greater than the light transmittance of the second display area.
  • the size of the light-emitting device in the first display area is set to be smaller than the size of the light-emitting device in the second display area, thereby increasing the light transmittance of the first display area, wherein the size of the light-emitting device is understood as The area of a single light-emitting device.
  • the density of the light emitting devices in the first display area is set to be smaller than the density of the light emitting devices in the second display area, thereby increasing the light transmittance of the first display area.
  • the light transmittance of the first display area and the light transmittance of the second display area mentioned in the present application both refer to the light transmittance per unit area.
  • the first display area and the fingerprint identification area are both partial areas of the display area, and the fingerprint identification area belongs to the second display area.
  • the camera is arranged on the side of the first display area away from its light-emitting surface, that is, the camera corresponds to the first display area. When the camera is called for shooting, the ambient light needs to penetrate the first display area before it can be captured by the camera.
  • the light transmittance of the first display area is set to be greater than that of the second display area in the embodiment of the present application, thereby increasing the light transmittance of the first display area to ensure the imaging effect when the camera is called for shooting.
  • the fingerprint identification area is used to realize the optical fingerprint identification function under the screen. In the fingerprint identification stage, the fingerprint identification light source is turned on, and the light emitted by the fingerprint identification light source is directed to the fingerprint identification area, and then reflected by the user's finger in the fingerprint identification area and then returned to the display panel. , the fingerprint identification area also needs to have a certain transmittance.
  • FIG. 5 is another schematic top view of the electronic device provided by the embodiment of the present application.
  • the electronic device includes three cameras, namely a first camera 102-1, a second camera 102-2 and a third camera 102-3.
  • the three cameras and the first display area 11 are all disposed on a side of the first display area 11 away from the light emitting surface of the display area.
  • the electronic device has three front-facing cameras.
  • the first camera 102-1 is a main camera
  • the second camera 102-2 is a wide-angle camera
  • the third camera 102-3 is a depth-sensing camera.
  • the camera, the fingerprint recognition light source and the light redirecting element are all located on the back side of the display panel 101 .
  • the fingerprint identification light source 103 In the fingerprint identification stage, after sensing the touch or pressing of the user's finger, the fingerprint identification light source 103 is turned on, the fingerprint identification light source 103 emits light to the fingerprint identification area 121, the user's finger reflects the light in the fingerprint identification area 121, and the light turns to The element 104 can transmit the light reflected by the user's finger to the photoelectric conversion chip 1021 of the first camera 102-1.
  • the relative positions of the three cameras are only schematically shown in FIG. 5 .
  • the number of front cameras in the electronic device is not limited. In the embodiment in which the electronic device includes two or three front cameras, or only one of the more front cameras is used as the main camera. Applied in the technical solution of the present application, by setting the relative positions of the main camera and the light turning element, the light reflected by the touch subject in the fingerprint identification area is transmitted to the photoelectric conversion chip of the camera used as the main camera.
  • the positions of the first display area and the fingerprint identification area in the display area are schematically shown. In practice, the positions of the first display area and the fingerprint identification area can be set accordingly according to specific design requirements.
  • FIG. 6 is another schematic cross-sectional view at the position of the tangent line A-A' in FIG. 2 .
  • the light redirecting element 104 includes a first reflecting portion 61 and a second reflecting portion 62 disposed opposite to each other.
  • the opposite surfaces of the first reflecting portion 61 and the second reflecting portion 62 are both reflecting surfaces, and the second reflecting portion 62 is located on the side of the first reflection part 61 away from the display panel 101, and in the direction e perpendicular to the display panel 101, there is a certain distance h between the reflection surface of the first reflection part 61 and the reflection surface of the second reflection part 62 .
  • the size of h is not limited in the embodiments of the present application, as long as it is ensured that after entering the light redirecting element 104 , the light can be reflected and propagated multiple times on the reflecting surface of the first reflecting portion 61 and the reflecting surface of the second reflecting portion 62 , that is, Can.
  • the medium spaced between the first reflection part 61 and the second reflection part 62 is air.
  • the light redirecting element 104 is at one end close to the fingerprint identification area 121 , and the second reflecting portion 62 extends beyond the edge of the first reflecting portion 61 , so that the reflecting surface of the second reflecting portion 62 can easily receive the fingerprint identification area 121
  • the light reflected by the touch body ensures that the fingerprint detection light for fingerprint identification reflected by the touch body can enter the light turning element 104, thereby reducing the loss of fingerprint detection light.
  • the light turning element 104 is at one end close to the first display area 11 , and the first reflection portion 61 extends beyond the edge of the second reflection portion 62 .
  • the light reflected by the touch body first goes to the second reflection part 62, and then after multiple reflections on the reflection surface of the first reflection part 61 and the reflection surface of the second reflection part 62 in the light turning element 104, it finally passes through the reflection surface. After being reflected by the first reflection portion 61 , the light is directed to the photoelectric conversion chip 1021 , ensuring that the light can be directed to the photoelectric conversion chip 1021 after being acted by the light redirecting element 104 , and is received by the photoelectric conversion chip 1021 .
  • FIG. 7 is another schematic cross-sectional view at the position of the tangent line A-A' in FIG. 2 .
  • the light redirecting element 104 is an optical waveguide 70 .
  • the optical waveguide 70 is a dielectric device that guides light to propagate therein.
  • the optical waveguide 70 includes a light incident surface 71 and a light exit surface 72, wherein the light incident surface 71 is located at one end of the optical waveguide 70 close to the fingerprint identification area 121, and the light exit surface 72 is located at one end of the optical waveguide 70 close to the first display area 11, and Both the light incident surface 71 and the light exit surface 72 are inclined surfaces.
  • the light incident surface 71 faces the fingerprint identification area 121 to ensure that all the light reflected by the touch subject in the fingerprint identification area 121 can enter the optical waveguide 70 from the light incident surface 71.
  • the light-emitting surface 72 faces the photoelectric conversion chip 1021 to ensure that after the light is transmitted through the optical waveguide 70, the light can be irradiated on the photoelectric conversion chip 1021 after being emitted from the light-emitting surface 72, so as to realize the collection of fingerprint image information by the photoelectric conversion chip of the camera. .
  • the optical waveguide is used as the light turning element, and the optical waveguide as a whole structure is more stable in structure, the performance of the optical waveguide to transmit the light is more reliable, and the light loss of the light transmitted in the optical waveguide is small, so that it can be Make sure that the light quantity of the fingerprint detection light received by the photoelectric conversion chip is large enough to ensure the accuracy of fingerprint detection.
  • a camera and a light turning element are arranged on the back side of the display panel, wherein the camera includes a photoelectric conversion chip.
  • the light turning element can transmit the light reflected by the touch subject touching the fingerprint identification area to the photoelectric conversion chip of the camera, so as to realize the collection of fingerprint image information by the photoelectric conversion chip of the camera. Since the light transmittance of the first display area corresponding to the under-screen camera is relatively high, in the fingerprint identification stage, the photoelectric conversion chip of the camera will not only receive the fingerprint detection light for fingerprint identification transmitted by the light turning element, but also receive Ambient light emitted to the photoelectric conversion chip after penetrating the first display area. Then the ambient light will cause certain interference to the collection of fingerprint images. Based on this, an embodiment of the present application further provides a fingerprint identification method, which can be applied to the electronic device provided by the embodiment of the present application, so as to eliminate the interference of ambient light on fingerprint detection and improve the accuracy of fingerprint identification.
  • FIG. 8 is a flowchart of a fingerprint identification method provided by an embodiment of the present application. As shown in FIG. 8 , the fingerprint identification method includes:
  • Step S101 In a fingerprint identification process: control the fingerprint identification light source to turn on, the photoelectric conversion chip receives the fingerprint detection light transmitted to the photoelectric conversion chip through the light turning element and the ambient light that penetrates the first display area and is directed to the photoelectric conversion chip , the photoelectric conversion chip collects the light signal to obtain the first image, the first image includes fingerprint image information and background image information, the fingerprint image information is obtained by the photoelectric conversion chip receiving the fingerprint detection light transmitted to the photoelectric conversion chip through the light turning element, and the background The image information is obtained by the photoelectric conversion chip receiving the ambient light that penetrates the first display area and then is directed to the photoelectric conversion chip; the fingerprint recognition light source is controlled to be turned off, and the photoelectric conversion chip receives the ambient light that penetrates the first display area and then is directed to the photoelectric conversion chip. , the photoelectric conversion chip collects the optical signal to obtain a second image, and the second image includes background image information.
  • the sequence of turning on and turning off the fingerprint recognition light source is not limited.
  • Step S102 performing differential processing on the first image and the second image to obtain a fingerprint image.
  • the fingerprint identification light source When a fingerprint identification is performed, the fingerprint identification light source is controlled to be turned on and off once.
  • the photoelectric conversion chip receives the fingerprint detection light transmitted to the photoelectric conversion chip through the light redirecting element and the ambient light that penetrates the first display area and is directed to the photoelectric conversion chip, then the image collected by the photoelectric conversion chip
  • the information includes fingerprint image information and background image information.
  • the fingerprint identification light source is turned off, the photoelectric conversion chip only receives ambient light that penetrates the first display area and then is directed to the photoelectric conversion chip, and the image signal collected by the photoelectric conversion chip only includes background image information.
  • the fingerprint image is obtained by performing differential processing on the first image and the second image, so that the interference of ambient light on fingerprint detection can be eliminated. Then, the fingerprint image is processed by feature extraction, identification and comparison, etc., which can improve the accuracy of fingerprint identification.
  • the electronic device provided by the embodiment of the present application further includes a pressure sensor, and the pressure sensor is used to detect the pressure on the fingerprint identification area, so as to determine whether the user touches or presses the fingerprint identification area, so as to trigger fingerprint detection. When there is touch or press in the fingerprint identification area, it enters the working stage of fingerprint identification detection.
  • FIG. 9 is a working flowchart of a fingerprint identification of an electronic device provided by an embodiment of the present application. As shown in FIG.
  • FIG. 10 is a modular schematic diagram of an electronic device provided by an embodiment of the present application.
  • the electronic device provided by this embodiment of the present application further includes a fingerprint processing module 200 , a photographing processing module 300 and a switching control module 400 , wherein the switching control module is used to control the electronic device in response to the fingerprint identification stage.
  • the fingerprint processing module is electrically connected to the photoelectric conversion chip, and is also used to control the photographing processing module to be electrically connected to the photoelectric conversion chip in response to the electronic device operating in the stage of invoking the camera to shoot.
  • the fingerprint processing module 200 is used for receiving the image information obtained by the photoelectric conversion chip 1021 after receiving light during the fingerprint identification stage to obtain a fingerprint image, and then processing the fingerprint image to realize fingerprint identification.
  • the photographing processing module 300 is configured to receive the image information of the photographed object obtained after the photoelectric conversion chip 1021 receives light when the camera 102 is called, and perform imaging according to the image information.
  • the fingerprint processing module 200 includes an acquisition unit 210 and a processor 220; wherein,
  • the acquisition unit 210 is configured to obtain a first image according to the optical signal collected by the photoelectric conversion chip when the fingerprint identification light source is turned on, the first image includes fingerprint image information and background image information, and the fingerprint image information is photoelectric
  • the conversion chip is obtained by receiving the fingerprint detection light transmitted to the photoelectric conversion chip 1021 through the light redirecting element, and the background image information is obtained by the photoelectric conversion chip receiving the ambient light that penetrates the first display area and then shoots toward the photoelectric conversion chip 1021;
  • the acquisition unit 210 is further configured to obtain a second image according to the optical signal collected by the photoelectric conversion chip 1021 when the fingerprint identification light source is turned off, the second image includes background image information; and send the first image and the second image to the processor 220;
  • the processor 220 is configured to perform differential processing between the first image and the second image to obtain a fingerprint image, and the processor 220 is further configured to perform processing such as feature extraction, identification and comparison on the fingerprint image to realize fingerprint identification.
  • the photoelectric conversion chip 1021 When driving the electronic device to work: in the fingerprint identification stage, the photoelectric conversion chip 1021 is controlled to be electrically connected to the fingerprint processing module 200, so that the fingerprint processing module 200 receives the image information obtained by the photoelectric conversion chip 1021; in the stage of calling the camera to shoot, The photoelectric conversion chip 1021 is controlled to be electrically connected to the photographing processing module 300 , so that the photographing processing module 300 receives the photographed object image information obtained by the photoelectric conversion chip 1021 . Therefore, the photoelectric conversion chip in the camera can be applied in the stage of invoking the camera for shooting and the stage of fingerprint identification respectively, and the hardware integration is improved. There is no need to additionally provide a photoelectric conversion chip for fingerprint identification, which can reduce costs. Moreover, the photoelectric conversion chip in the camera has high imaging quality and precision, which can improve the accuracy of fingerprint recognition.
  • the electronic device provided by the embodiment of the present application may be, for example, a mobile phone, a tablet computer, a notebook computer, an electronic paper book, a television set, and other electronic devices.

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Abstract

本申请实施例提供一种电子设备。电子设备包括显示面板、摄像头、指纹识别光源和光线转向元件；显示面板中第一显示区的透光率大于第二显示区的透光率，第二显示区包括指纹识别区；摄像头、指纹识别光源和光线转向元件均位于显示面板的背离其出光面的一侧；摄像头包括光电转换芯片，摄像头设置于第一显示区的背离其出光面一侧；指纹识别光源用于在指纹识别阶段将光线射向指纹识别区；光线转向元件用于在指纹识别阶段将按压指纹识别区的触摸主体反射的光线传递到光电转换芯片上。在指纹识别阶段，能够利用摄像头的光电转换芯片采集指纹图像信息，进而实现指纹识别，摄像头中光电转换芯片具有较高的成像质量和精度，能够提升指纹识别准确率。

Description

一种电子设备
本申请要求于2020年11月12日提交中国专利局、申请号为202011262385.0、申请名称为“一种电子设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请属于显示技术领域，更具体的涉及一种电子设备。
背景技术
随着对电子显示产品屏占比的要求越来越高，全面屏的概念应运而生。对于具有指纹识别功能的电子产品来说，传统的电容式指纹识别方案需要设置电容芯片，在电子产品正面设置指纹电容芯片时会影响屏占比。所以为了提高屏占比，实现全面屏，目前的主流产品都会采用屏下指纹识别技术。
屏下指纹识别主要利用光的反射原理，手指按在屏幕指纹识别区域时，指纹识别光源发出的光线照亮整个手指表面，这些光被手指反射后再次进入屏幕，最终射到屏幕下方的光电转换元件上，光电转换元件采集指纹图像进而实现指纹识别。而目前屏下光学指纹识别方案仍然存在指纹识别的准确率较低，影响用户体验的问题。
发明内容
有鉴于此，本申请提供一种电子设备，以解决现有技术中指纹识别准确率较低的技术问题。
本申请实施例提供一种电子设备，电子设备包括显示面板、摄像头、指纹识别光源和光线转向元件；显示面板包括第一显示区和第二显示区，第一显示区的透光率大于第二显示区的透光率，第二显示区包括指纹识别区；
摄像头、指纹识别光源和光线转向元件均位于显示面板的背离其出光面的一侧；其中，
摄像头包括光电转换芯片，摄像头设置于第一显示区的背离其出光面一侧；
指纹识别光源，用于在指纹识别阶段将光线射向指纹识别区；
光线转向元件，用于在指纹识别阶段将按压指纹识别区的触摸主体反射的光线传递到光电转换芯片上。
在本申请实施例提供的电子设备中，将摄像头设置在第一显示区的背离其出光面的一侧，实现了屏下摄像头方案。在显示面板的下方设置光线转向元件，光线转向元件能够将指纹识别区内经触摸主体反射的光线传递到摄像头的光电转换芯片上。则在指纹识别阶段，摄像头中的光电转换芯片能够接收用于指纹识别的指纹检测光线，从而实现利用摄像头中的光电转换芯片采集指纹图像信息，进而实现指纹识别。摄像头中光电转换芯片具有较高的成像质量和精度，能够提升指纹识别准确率。而且本申请 实施例中，摄像头中光电转换芯片能够分别在调用摄像头进行拍摄的阶段和指纹识别阶段进行应用，提高了硬件集成度。不需要再额外设置用于指纹识别的光电转换芯片，能够降低成本。
进一步的，电子设备还包括指纹处理模块、拍摄处理模块以及切换控制模块；切换控制模块用于响应于电子设备工作在指纹识别阶段时，控制指纹处理模块与光电转换芯片电连接；切换控制模块还用于响应于电子设备工作在调用摄像头进行拍摄的阶段时，控制拍摄处理模块与光电转换芯片电连接；指纹处理模块，用于接收光电转换芯片受光后获取的图像信息，进行指纹识别；拍摄处理模块，用于接收光电转换芯片受光后获取的图像信息，进行拍摄物体成像。
在实际应用中，切换控制模块与电子设备的应用处理器芯片连接，由应用处理器芯片向其发送控制信号，切换控制模块根据接收的控制芯片来判断电子设备的工作状态，进而根据电子设备的工作状态控制指纹处理模块与光电转换芯片电连接，或者控制拍摄处理模块与光电转换芯片电连接。以实现光电转换芯片在电子设备的不同的工作状态中的应用。
具体的，指纹处理模块，指纹处理模块包括获取单元和处理器；其中，获取单元用于在一次指纹识别的过程中：在指纹识别光源开启时，根据光电转换芯片采集的光信号得到第一图像，并将第一图像发送给处理器，第一图像包括指纹图像信息和背景图像信息；在指纹识别光源关闭时，根据光电转换芯片采集的光信号得到第二图像，并将第二图像发送给处理器，第二图像包括背景图像信息；处理器用于将第一图像和第二图像进行差分处理得到指纹图像。
在进行一次指纹识别时，控制指纹识别光源开启一次和关闭一次。当指纹识别光源开启时，光电转换芯片接收经光线转向元件传递到光电转换芯片之上的指纹检测光和穿透第一显示区后射向光电转换芯片的环境光，则光电转换芯片采集的图像信息包括指纹图像信息和背景图像信息。当指纹识别光源关闭时，光电转换芯片仅接收穿透第一显示区后射向光电转换芯片的环境光，则光电转换芯片采集的图像信号只包括背景图像信息。将第一图像和第二图像进行差分处理得到指纹图像，从而能够消除环境光对指纹检测的干扰，能够提升指纹识别准确率。
具体的，摄像头还包括透镜组，透镜组位于光电转换芯片的靠近显示面板的一侧。透镜组具有一定的聚光作用，由光线转向元件射出的指纹检测光线经透镜组的作用后能够汇聚在光电转换芯片之上，减少光损失，保证光线的利用率。
具体的，光线转向元件和透镜组错位设置。在调用摄像头进行成像阶段时，避免光线转向元件对穿透第一显示区后射向摄像头的光线造成遮挡，保证成像性能不受影响。
进一步的，光线转向元件位于指纹识别区和第一显示区之间。具体的，光线转向元件包括入光侧和出光侧，入光侧靠近指纹识别区，出光侧靠近摄像头，从而确保在指纹识别阶段指纹识别区内经触摸主体反射的光线能够进入光线转向元件内，并且经光线转向元件的作用将光线传递到摄像头中的光电转换芯片之上。
在一种实施例中，光线转向元件包括相对设置的第一反射部和第二反射部，第一反射部和第二反射部相对的表面均为反射面，第二反射部位于第一反射部的远离显示 面板的一侧，且第一反射部的反射面和第二反射部的反射面之间间隔一定距离。可选的，第一反射部和第二反射部之间间隔的介质为空气。该实施方式通过第一反射部和第二反射部的设置，能够保证光线在进入光线转向元件后，在第一反射部的反射面和第二反射部的反射面上进行多次反射传播，进而将光线传递到摄像头的光电转换芯片上。
进一步的，在靠近指纹识别区的一端，第二反射部延伸出第一反射部的边缘；从而第二反射部的反射面能够便于接收指纹识别区内经触摸主体反射的光线，确保经触摸主体反射的用于指纹识别的指纹检测光线均能够射入光线转向元件中，减少指纹检测光的损失。在靠近第一显示区的一端，第一反射部延伸出第二反射部的边缘，从而确保光线能够经光线转向元件作用后射向光电转换芯片，提升光线转向元件对指纹检测光的传递效率。
在另一种实施例中，光线转向元件为光波导，光波导包括入光面和出光面，其中，入光面位于靠近指纹识别区的一端，且入光面朝向指纹识别区；出光面位于靠近第一显示区的一端，且出光面朝向光电转换芯片。光波导作为一个整体结构，其结构上更加稳定，光波导对光线进行传递的性能更加可靠，光线在光波导中传输的光损失小，从而能够确保光电转换芯片接收到的指纹检测光的光量足够大，进而保证指纹检测的准确度。
具体的，显示面板包括衬底基板和发光器件层，发光器件层位于衬底基板的远离摄像头的一侧，其中，发光器件层包括多个发光器件；第一显示区内发光器件的密度小于第二显示区内发光器件的密度。该实施方式中，通过减小第一显示区内发光器件的设置密度，以提升第一显示区的透光率，进而确保调用摄像头进行拍摄时的成像效果。
本申请提供的电子设备，具有如下有益效果：在显示面板的背离出光面的一侧设置光线转向元件，光线转向元件能够将指纹识别区内经触摸主体反射的光线传递到摄像头的光电转换芯片上。在指纹识别阶段，摄像头中的光电转换芯片能够接收用于指纹识别的指纹检测光线，从而实现利用摄像头的光电转换芯片采集指纹图像信息，进而实现指纹识别。本申请实施例摄像头中光电转换芯片能够分别在调用摄像头进行拍摄的阶段和指纹识别阶段中进行应用，提高了硬件集成度。不需要再额外设置用于指纹识别的光电转换芯片，能够降低成本。而且摄像头中光电转换芯片具有较高的成像质量和精度，能够提升指纹识别准确率。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为相关技术中屏下指纹识别方案示意图；
图2为本申请实施例提供的电子设备的一种俯视示意图；
图3为图2中切线A-A＇位置处一种截面示意图；
图4为图2中切线B-B＇位置处另一种截面示意图；
图5为本申请实施例提供的电子设备的另一种俯视示意图；
图6为图2中切线A-A＇位置处另一种截面示意图；
图7为图2中切线A-A＇位置处另一种截面示意图；
图8为本申请实施例提供的指纹识别方法流程图；
图9为本申请实施例提供的电子设备的一种指纹识别工作流程图；
图10为本申请实施例提供的电子设备的模块化示意图。
具体实施方式
图1为屏下指纹识别方案示意图，如图1所示，在显示面板10的显示区的下方设置指纹光电转换芯片20和指纹识别光源30，当手指按压在指纹识别区域时，指纹识别光源30发出光线穿透显示面板10后被手指反射，经手指反射的光再次穿透显示面板10后被指纹光电转换芯片20接收。其中，当指纹识别光源30发出的光照射到手指后，手指指纹的谷和脊均能够对光进行反射，而经手指指纹的谷反射的光量和经脊反射的光量不同，则指纹光电转换芯片20中感光器件接收经指纹的谷或脊反射的光线后产生的信号量不同。从而根据多个感光器件产生的信号量的大小识别出指纹的谷和脊，进而形成指纹图像。在光学指纹识别技术中，需要设置相应的指纹光电转换芯片来接收经指纹反射的光线，图1中示意指纹光电转换芯片设置在显示面板的背侧的方案。在屏下指纹识别方案中，用于指纹识别的光线需要穿透两次显示面板才能被指纹光电转换芯片所接收，而显示面板的透光率有限，则能够被指纹光电转换芯片所接收的光量有限。在指纹光电转换芯片能够接收的光量有限的情况下，指纹光电转换芯片的光敏性能及精度则成为指纹识别准确率的主要影响因素。
基于此，本申请实施例提供一种电子设备，电子设备包括屏下摄像头，利用屏下摄像头中的光电转换芯片来接收指纹检测光线，进而实现指纹识别。摄像头中光电转换芯片与常规的指纹光电转换芯片相比成像质量和精度会更高，从而能够提升指纹识别准确率。下面将以具体的实施例对本申请进行详细的举例说明。
图2为本申请实施例提供的电子设备的一种俯视示意图。图3为图2中切线A-A＇位置处一种截面示意图。
如图2和图3所示，电子设备包括显示面板101、摄像头102、指纹识别光源103和光线转向元件104。显示面板101包括显示区1和非显示区2，非显示区2围绕显示区1设置。显示区1包括第一显示区11和第二显示区12，第一显示区11的透光率大于第二显示区12的透光率，此处的透光率理解为单位面积内的透光率。第二显示区12包括指纹识别区121。图3还示意出电子设备中的保护盖板105，保护盖板105用于对显示面板101进行保护。
摄像头102、指纹识别光源103和光线转向元件104均位于显示面板101的背侧；其中，显示面板101的背侧理解为背离显示面板101出光面的一侧。
摄像头102设置于第一显示区11的背离其出光面的一侧。摄像头包括光电转换芯片1021和透镜组1022(图中示意性表示)，透镜组1022位于光电转换芯片1021的靠近显示面板101的一侧。透镜组1022包括一个或者多个透镜。可选的，透镜组1022包括堆叠的多片透镜，不同的透镜组具有不同的功能，比如透镜组包括聚焦透镜组、 变焦透镜组、补偿透镜组等。光电转换芯片1021为互补金属氧化物半导体(Complementary Metal Oxide Semiconductor，CMOS)芯片，光电转换芯片1021包括阵列排布的多个感光器件。感光器件具有光电转换功能，用于接收光照后将光信号转换成电信号。本申请实施例中，摄像头102设置于第一显示区11的背离其出光面的一侧，也即将摄像头102设置在显示区1的下方，实现屏下摄像头方案，能够提升屏占比。摄像头102用作前置相机使用，在应用中当不调用摄像头时，第一显示区11能够正常显示图像；当需要调用摄像头时，可以控制第一显示区11不显示，环境光穿透第一显示区11后被摄像头102中的光电转换芯片1021所接收，光电转换芯片1021采集图像信息然后进行成像。设置第一显示区11的透光率大于第二显示区12的透光率，保证摄像头102在应用中能够接收足够多的环境光，确保摄像头102的成像质量。
在电子设备工作在指纹识别阶段时，当感应到触摸主体(比如用户手指)触摸或者按压指纹识别区121时，则控制指纹识别光源103开启。可以通过设置压力传感器来感测用户对指纹识别区的操作，其中，用户手指触摸或者按压，或者用户手指放置在指纹识别区上时，用户手指都会向显示面板施加一定的作用力，压力传感器通过感测这个作用力来判断用户对指纹区的操作。指纹识别光源103开启后，指纹识别光源103发出的光线射向指纹识别区121，则指纹识别区121能够被指纹识别光源103发出的光线照亮。比如锁屏状态下或者其他应用场景中在进行指纹识别检测时，指纹识别光源103开启后，指纹识别光源103射向指纹识别区121的光线能够被用户手指反射，经手指指纹的谷和脊反射的光量不同，则光电转换芯片1021中感光器件在接收经指纹的谷或脊反射的光线后产生的信号量不同。根据多个感光器件产生的信号量的大小差异识别出指纹的谷和脊，进而形成指纹图像，完成指纹识别检测。图中对于指纹识别光源103与指纹识别区121的相对位置仅做示意性表示。在一种实施例中，指纹识别光源103可以位于指纹识别区121的正下方。在另一种实施例中，指纹识别光源103和指纹识别区121错位设置，也即，在俯视角度观看电子设备时，指纹识别光源103位于指纹识别区的斜下方。在实际应用中，可以根据具体的设计需求对指纹识别光源103和指纹识别区121的相对位置进行合理设计，同时结合对指纹识别光源103的出光角度的设计，以保证指纹识别光源103发出的光线能够射向指纹识别区121，从而在指纹识别阶段用户手指触摸或按压指纹识别区121时，光线能够照射到用户手指上。
光线转向元件104，用于在指纹识别阶段将按压指纹识别区121的触摸主体反射的光线传递到光电转换芯片1021上。如图3中示意的光路图，在指纹识别阶段，指纹识别光源103开启后，指纹识别光源103发出的光线射向指纹识别区121，光线穿透显示面板101被触摸指纹识别区121的触摸主体M反射之后再次射回显示面板101内。经过光线转向元件104的作用，将触摸主体M反射的光线传递到光电转换芯片1021之上，从而利用摄像头102中的光电转换芯片1021采集指纹图像信息。然后光电转换芯片1021将指纹图像信息发送给指纹处理模块，指纹处理模块对指纹图像信号进行处理，进而实现指纹识别。也即本申请实施例中摄像头中的光电转换芯片能够在调用摄像头时获取拍摄物体的图像信息，同时摄像头中的光电转换芯片还能够应用在指纹识别功能中获取指纹图像信息。
本申请实施例中光电转换芯片用于，在电子设备工作在指纹识别阶段时，接收经 光线转向元件传递到其上的指纹检测光，以采集光信号获取指纹图像信息；
光电转换芯片还用于，在电子设备工作在调用摄像头进行拍摄的阶段时，接收由拍摄物体发出的光线，以采集光信号获取拍摄物体的图像信息。其中，拍摄物体会反射或者散射环境光，在调用摄像头进行拍摄时，由拍摄物体表面反射或者散射的光线穿透第一显示区后被光电转换芯片所接收。拍摄物体相当于光源，拍摄物体发出的光线理解为拍摄物体表面反射或者散射的光线。
具体的，本申请实施例提供的电子设备包括指纹处理模块、拍摄处理模块以及切换控制模块。其中，切换控制模块用于响应于电子设备工作在指纹识别阶段时，控制指纹处理模块与光电转换芯片电连接，指纹处理模块接收光电转换芯片采集的光信号，进而对光信号进行处理得到指纹图像信息。切换控制模块还用于响应于电子设备工作在调用摄像头进行拍摄的阶段时，控制拍摄处理模块与光电转换芯片电连接，拍摄处理模块接收光电转换芯片采集的光信号，进行处理以得到拍摄物体的图像信息。在实际应用中，切换控制模块与电子设备的应用处理器芯片连接，由应用处理器芯片向其发送控制信号，切换控制模块根据接收的控制芯片来判断电子设备的工作状态，进而根据电子设备的工作状态控制指纹处理模块与光电转换芯片电连接，或者控制拍摄处理模块与光电转换芯片电连接。以实现光电转换芯片在电子设备的不同的工作状态中的应用。
本申请实施例提供的电子设备，显示区内第一显示区的透光率大于第二显示区的透光率，将摄像头设置在第一显示区的下方，实现了屏下摄像头方案，能够提升屏占比。在显示面板的下方设置光线转向元件，光线转向元件能够将指纹识别区内经触摸主体反射的光线传递到摄像头的光电转换芯片上。也即在指纹识别阶段，摄像头中的光电转换芯片能够接收用于指纹识别的指纹检测光线，从而实现利用摄像头中的光电转换芯片采集指纹图像信息，进而实现指纹识别。本申请实施例中，摄像头中光电转换芯片能够分别在调用摄像头进行拍摄的阶段和指纹识别阶段进行应用，提高了硬件集成度。不需要再额外设置用于指纹识别的光电转换芯片，能够降低成本。而且摄像头中光电转换芯片具有较高的成像质量和精度，能够提升指纹识别准确率。
光线转向元件104设置在显示面板101的背离出光面的一侧，由图2俯视图可以看出光线转向元件104位于指纹识别区121和摄像头102之间。摄像头102位于第一显示区11的下方，也即光线转向元件104位于指纹识别区121和第一显示区11之间。光线转向元件104包括入光侧(未示出)和出光侧(未示出)，入光侧靠近指纹识别区121，出光侧靠近摄像头102。从而确保在指纹识别阶段指纹识别区内经触摸主体反射的光线能够进入光线转向元件内，并且经光线转向元件的作用将光线传递到摄像头中的光电转换芯片之上。
具体的，如图3中的示意，摄像头102还包括透镜组1022。在指纹识别阶段，指纹识别光源103发出的光线射向指纹识别区121，在指纹识别区121内经触摸主体M反射的光线射入光线转向元件104，光线在经过光线转向元件104的作用后穿透透镜组1022，然后照射在光电转换芯片1021之上。其中，摄像头102中的透镜组1022具有聚光的作用，由光线转向元件104射出的指纹检测光线经透镜组1022的作用后能够汇聚在光电转换芯片之上，减少光损失，保证光线的利用率。
进一步的，继续参考图3所示的，光线转向元件104和透镜组1022错位设置。保证在指纹识别阶段，经光线转向元件104作用后的指纹检测光能够经透镜组1022的作用后照射在光电转换芯片1021上。同时，避免光线转向元件104对穿透第一显示区11后射向摄像头102的光线造成遮挡，保证在调用摄像头进行拍摄时的成像性能不受影响。
具体的，在一种实施例中，在光线转向元件的靠近第一显示区的一端，光线转向元件的边缘与透镜组的边缘平齐。该实施方式中光线转向元件距离摄像头足够近，经光线转向元件作用后的绝大部分指纹检测光均能够经透镜组作用后照射在光电转换芯片上，保证指纹识别检测的准确度。同时光线转向元件的设置不会对调用摄像头进行拍摄时的成像性能造成影响。
具体的，本申请实施例提供的电子设备中显示面板为有机发光显示面板，图4为图2中切线B-B＇位置处另一种截面示意图。如图4所示，显示面板101包括衬底基板21，以及位于衬底基板21之上的阵列层22、发光器件层23和封装层24。发光器件层23包括多个发光器件40，发光器件40包括依次堆叠的阳极41、发光层42和阴极43。其中，阳极41为金属反射电极，阴极43为透明电极。在发光器件40工作时，发光层42发出的光线由阴极43射出，实现发光器件40的发光。发光器件层23还包括像素定义层50，像素定义层50用于间隔相邻的发光器件40。其中，阵列层22包括像素电路221，像素电路221用于驱动发光器件40发光，图4中仅示意出像素电路221中的一个晶体管T。封装层24用于对发光器件层23中的发光器件40进行保护，以隔绝水氧，保证发光器件40的使用寿命。在一种实施例中，封装层为薄膜封装，包括至少一层无机封装层和至少一层有机封装层。在另一种实施例中，封装层为刚性封装，封装层包括封装盖板，封装盖板通过封框胶与阵列层粘结固定。
图4中还示意出了保护盖板105。可选的，显示面板101还包括触控模组，触控模组位于封装层远离显示层的一侧，从而能够实现电子设备的触控功能。
在本申请实施例提供的电子设备中，显示面板的第一显示区的透光率大于第二显示区的透光率。在一种实施例中，设置第一显示区内的发光器件的尺寸小于第二显示区内的发光器件的尺寸，从而增大第一显示区的透光率，其中，发光器件的尺寸理解为单个发光器件的面积。在另一种实施例中，设置第一显示区内发光器件的密度小于第二显示区内发光器件的密度，从而增大第一显示区的透光率。
另外，本申请中涉及的第一显示区的透光率以及第二显示区的透光率均是指单位面积的透光率。本申请实施例中第一显示区和指纹识别区均为显示区内的部分区域，且指纹识别区属于第二显示区。其中，摄像头设置在第一显示区的背离其出光面的一侧，也即，摄像头与第一显示区相对应，在调用摄像头进行拍摄时，环境光需要穿透第一显示区后才能被摄像头所接收，本申请实施例中设置第一显示区的透光率大于第二显示区的透光率，从而增大第一显示区的透光率以保证调用摄像头进行拍摄时的成像效果。指纹识别区用于实现屏下光学指纹识别功能，在指纹识别阶段，指纹识别光源开启，指纹识别光源射出的光线射向指纹识别区，然后在指纹识别区内经用户手指反射后再射回显示面板，则指纹识别区也需要具有一定的透光率。
在一种实施例中，图5为本申请实施例提供的电子设备的另一种俯视示意图。如 图5所示，电子设备包括三个摄像头，分别为第一摄像头102-1、第二摄像头102-2和第三摄像头102-3。三个摄像头均与第一显示区11均设置在第一显示区11的背离显示区的出光面一侧。该实施方式中电子设备具有三个前置摄像头。可选的，第一摄像头102-1为主摄像头，第二摄像头102-2为广角摄像头，第三摄像头102-3为深感摄像头。摄像头、指纹识别光源和光线转向元件均位于显示面板101的背侧。在指纹识别阶段，感应到用户手指的触控或按压后，指纹识别光源103开启，指纹识别光源103将光线射向指纹识别区121，用户手指对指纹识别区121内的光线进行反射，光线转向元件104能够将用户手指反射的光线传递到第一摄像头102-1的光电转换芯片1021上。图5中对于三个摄像头的相对位置仅作示意性表示。
需要说明的是，本申请实施例中对于电子设备中前置摄像头的个数不做限定。电子设备中包括两个或者三个前置摄像头的实施例中，或者更多个前置摄像头中均只有一个作为主摄像头使用。应用在本申请技术方案中，通过设置主摄像头和光线转向元件的相对位置，将指纹识别区内经触摸主体反射的光线传递到作为主摄像头使用的摄像头的光电转换芯片上。
另外，图1和图5实施例中，第一显示区以及指纹识别区在显示区内的位置均做示意性表示。实际中可以根据具体的设计需要对第一显示区和指纹识别区的位置进行相应的设定。
具体的，在一种实施例中，图6为图2中切线A-A＇位置处另一种截面示意图。如图6所示，光线转向元件104包括相对设置的第一反射部61和第二反射部62，第一反射部61和第二反射部62相对的表面均为反射面，第二反射部62位于第一反射部61的远离显示面板101的一侧，且在垂直于显示面板101的方向e上，第一反射部61的反射面和第二反射部62的反射面之间间隔一定距离h。本申请实施例中对于h的大小不做限定，只要保证光线在进入光线转向元件104后，能够在第一反射部61的反射面和第二反射部62的反射面上进行多次反射传播即可。可选的，第一反射部61和第二反射部62之间间隔的介质为空气。
如图中示意的，光线转向元件104在靠近指纹识别区121的一端，第二反射部62延伸出第一反射部61的边缘，从而第二反射部62的反射面能够便于接收指纹识别区121内经触摸主体反射的光线，确保经触摸主体反射的用于指纹识别的指纹检测光线均能够射入光线转向元件104中，减少指纹检测光的损失。如图6中示意的，光线转向元件104在靠近第一显示区11的一端，第一反射部61延伸出第二反射部62的边缘。经触摸主体反射的光线首先射向第二反射部62，然后在光线转向元件104中的第一反射部61的反射面和第二反射部62的反射面上分别经过多次反射后，最终经第一反射部61的反射后射向光电转换芯片1021，确保光线能够经光线转向元件104作用后射向光电转换芯片1021，被光电转换芯片1021所接收。
在另一种实施例中，图7为图2中切线A-A＇位置处另一种截面示意图。如图7所示，光线转向元件104为光波导70。光波导70为引导光线在其中传播的介质装置。光波导70包括入光面71和出光面72，其中，入光面71位于光波导70的靠近指纹识别区121的一端，出光面72位于光波导70的靠近第一显示区11的一端，且入光面71和出光面72均为斜面。其中，入光面71朝向指纹识别区121，以确保指纹识别区 121内经触摸主体反射的光线均能够由入光面71射入光波导70中。出光面72朝向光电转换芯片1021，以确保光线经光波导70的传输后，由出光面72射出后能够照射到光电转换芯片1021之上，从而实现利用摄像头的光电转换芯片进行指纹图像信息的采集。该实施方式中，采用光波导作为光线转向元件，光波导作为一个整体结构，其结构上更加稳定，光波导对光线进行传递的性能更加可靠，光线在光波导中传输的光损失小，从而能够确保光电转换芯片接收到的指纹检测光的光量足够大，进而保证指纹检测的准确度。
本申请实施例在显示面板的背侧设置摄像头和光线转向元件，其中，摄像头包括光电转换芯片。在指纹识别阶段，光线转向元件能够将触摸在指纹识别区的触摸主体反射的光线传递到摄像头的光电转换芯片之上，实现利用摄像头的光电转换芯片进行指纹图像信息的采集。由于屏下摄像头对应的第一显示区的透光率较高，则在指纹识别阶段，摄像头的光电转换芯片不仅会接收经光线转向元件传递的用于指纹识别的指纹检测光，还会接收到穿透第一显示区后射向光电转换芯片的环境光。则环境光会对指纹图像的采集造成一定的干扰。基于此，本申请实施例还提供一种指纹识别方法，能够应用于本申请实施例提供的电子设备，以消除环境光对指纹检测的干扰，提升指纹识别准确率。
图8为本申请实施例提供的指纹识别方法流程图，如图8所示，指纹识别方法包括：
步骤S101：在一次指纹识别过程中：控制指纹识别光源开启，光电转换芯片接收经光线转向元件传递到光电转换芯片上的指纹检测光和穿透第一显示区后射向光电转换芯片的环境光，光电转换芯片采集光信号得到第一图像，第一图像包括指纹图像信息和背景图像信息，指纹图像信息为光电转换芯片接收经光线转向元件传递到光电转换芯片上的指纹检测光得到的，背景图像信息为光电转换芯片接收穿透第一显示区后射向光电转换芯片的环境光得到的；控制指纹识别光源关闭，光电转换芯片接收穿透第一显示区后射向光电转换芯片的环境光，光电转换芯片采集光信号得到第二图像，第二图像包括背景图像信息。其中，对于指纹识别光源开启和关闭的先后顺序不做限定。
步骤S102：将第一图像和第二图像进行差分处理得到指纹图像。
在进行一次指纹识别时，控制指纹识别光源开启一次和关闭一次。当指纹识别光源开启时，光电转换芯片接收经光线转向元件传递到光电转换芯片之上的指纹检测光和穿透第一显示区后射向光电转换芯片的环境光，则光电转换芯片采集的图像信息包括指纹图像信息和背景图像信息。当指纹识别光源关闭时，光电转换芯片仅接收穿透第一显示区后射向光电转换芯片的环境光，则光电转换芯片采集的图像信号只包括背景图像信息。将第一图像和第二图像进行差分处理得到指纹图像，从而能够消除环境光对指纹检测的干扰。然后再对指纹图像进行特征提取、识别比对等处理，能够提升指纹识别准确率。
具体的，本申请实施例提供的电子设备还包括压力传感器，压力传感器用于检测指纹识别区承受压力情况，以判断用户对指纹识别区是否有触摸或者按压的操作，以触发指纹检测，当检测到指纹识别区存在触摸或者按压时，则进入到指纹识别检测的 工作阶段。图9为本申请实施例提供的电子设备的一种指纹识别工作流程图。如图9所示，首先进行指纹识别区的按压检测，当检测到指纹识别区存在按压时，则控制指纹识别光源开启；然后控制摄像头中的光电转换单元采集光信号得到第一图像；然后控制指纹识别光源关闭；摄像头中的光电转换单元采集光信号得到第二图像；然后将第一图像和第二图像进行差分处理得到指纹图像。在后续可以对指纹图像进行特征提取、识别比对等处理以实现指纹识别。
进一步的，图10为本申请实施例提供的电子设备的模块化示意图。如图10所示，本申请实施例提供的电子设备还包括指纹处理模块200、拍摄处理模块300和切换控制模块400，其中，切换控制模块用于响应于电子设备工作在指纹识别阶段时，控制指纹处理模块与光电转换芯片电连接，还用于响应于电子设备工作在调用摄像头进行拍摄的阶段时，控制拍摄处理模块与光电转换芯片电连接。指纹处理模块200用于在指纹识别阶段时，接收光电转换芯片1021受光后获取的图像信息，得到指纹图像，然后对指纹图像进行处理，以实现指纹识别。拍摄处理模块300用于在调用摄像头102时，接收光电转换芯片1021受光后获取的拍摄物体的图像信息，并根据图像信息进行成像。
指纹处理模块200包括获取单元210和处理器220；其中，
在一次指纹识别过程中，获取单元210，用于在指纹识别光源开启时，根据光电转换芯片采集的光信号得到第一图像，第一图像包括指纹图像信息和背景图像信息，指纹图像信息为光电转换芯片接收经光线转向元件传递到光电转换芯片1021上的指纹检测光得到的，背景图像信息为光电转换芯片接收穿透第一显示区后射向光电转换芯片1021的环境光得到的；获取单元210还用于在指纹识别光源关闭时，根据光电转换芯片1021采集的光信号得到第二图像，第二图像包括背景图像信息；并将第一图像和第二图像发送给处理器220；
处理器220用于将第一图像和第二图像进行差分处理得到指纹图像，处理器220还用于对指纹图像进行特征提取、识别比对等处理以实现指纹识别。
在驱动电子设备工作时：在指纹识别阶段，控制光电转换芯片1021与指纹处理模块200电连接，以实现指纹处理模块200接收光电转换芯片1021获取的图像信息；在调用摄像头进行拍摄的阶段时，控制光电转换芯片1021与拍摄处理模块300电连接，以实现拍摄处理模块300接收光电转换芯片1021获取的拍摄物体图像信息。从而实现摄像头中光电转换芯片能够分别在调用摄像头进行拍摄的阶段和指纹识别阶段进行应用，提高了硬件集成度。不需要再额外设置用于指纹识别的光电转换芯片，能够降低成本。而且摄像头中光电转换芯片具有较高的成像质量和精度，能够提升指纹识别准确率。
本申请实施例提供的电子设备可以是例如、手机、平板计算机、笔记本电脑、电纸书、电视机等电子设备。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明保护的范围之内。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制； 尽管参照前述各实施例对本发明进行了详细的说明，本领域的技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims (10)

  1. 一种电子设备，其特征在于，所述电子设备包括显示面板、摄像头、指纹识别光源和光线转向元件；
    所述显示面板包括第一显示区和第二显示区，所述第一显示区的透光率大于所述第二显示区的透光率，所述第二显示区包括指纹识别区；
    所述摄像头、所述指纹识别光源和所述光线转向元件均位于所述显示面板的背离其出光面的一侧；其中，
    所述摄像头包括光电转换芯片，所述摄像头设置于所述第一显示区的背离其出光面一侧；
    所述指纹识别光源，用于在指纹识别阶段将光线射向所述指纹识别区；
    所述光线转向元件，用于在指纹识别阶段将按压所述指纹识别区的触摸主体反射的光线传递到所述光电转换芯片上。
  2. 根据权利要求1所述的电子设备，其特征在于，所述电子设备还包括指纹处理模块、拍摄处理模块以及切换控制模块；
    所述切换控制模块用于响应于所述电子设备工作在指纹识别阶段时，控制所述指纹处理模块与所述光电转换芯片电连接；所述切换控制模块还用于响应于所述电子设备工作在调用摄像头进行拍摄的阶段时，控制所述拍摄处理模块与所述光电转换芯片电连接；
    所述指纹处理模块，用于接收所述光电转换芯片受光后获取的图像信息，进行指纹识别；
    所述拍摄处理模块，用于接收所述光电转换芯片受光后获取的图像信息，进行拍摄物体成像。
  3. 根据权利要求2所述的电子设备，其特征在于，
    所述指纹处理模块，所述指纹处理模块包括获取单元和处理器；其中，
    所述获取单元用于在一次指纹识别的过程中：在所述指纹识别光源开启时，根据所述光电转换芯片采集的光信号得到第一图像，并将所述第一图像发送给所述处理器，所述第一图像包括指纹图像信息和背景图像信息；在所述指纹识别光源关闭时，根据所述光电转换芯片采集的光信号得到第二图像，并将所述第二图像发送给所述处理器，所述第二图像包括背景图像信息；
    所述处理器用于将所述第一图像和所述第二图像进行差分处理得到指纹图像。
  4. 根据权利要求1所述的电子设备，其特征在于，
    所述摄像头还包括透镜组，所述透镜组位于所述光电转换芯片的靠近所述显示面板的一侧。
  5. 根据权利要求4所述的电子设备，其特征在于，
    所述光线转向元件和所述透镜组错位设置。
  6. 根据权利要求1所述的电子设备，其特征在于，
    所述光线转向元件位于所述指纹识别区和所述第一显示区之间。
  7. 根据权利要求1所述的电子设备，其特征在于，
    所述光线转向元件包括相对设置的第一反射部和第二反射部，所述第一反射部和 所述第二反射部相对的表面均为反射面，所述第二反射部位于所述第一反射部的远离所述显示面板的一侧，且所述第一反射部的反射面和所述第二反射部的反射面之间间隔一定距离。
  8. 根据权利要求7所述的电子设备，其特征在于，
    在靠近所述指纹识别区的一端，所述第二反射部延伸出所述第一反射部的边缘；
    在靠近所述第一显示区的一端，所述第一反射部延伸出所述第二反射部的边缘。
  9. 根据权利要求1所述的电子设备，其特征在于，
    所述光线转向元件为光波导，所述光波导包括入光面和出光面，其中，
    所述入光面位于靠近所述指纹识别区的一端，且所述入光面朝向所述指纹识别区；
    所述出光面位于靠近所述第一显示区的一端，且所述出光面朝向所述光电转换芯片。
  10. 根据权利要求1所述的电子设备，其特征在于，
    所述显示面板包括衬底基板和发光器件层，所述发光器件层位于所述衬底基板的远离所述摄像头的一侧，其中，所述发光器件层包括多个发光器件；
    所述第一显示区内所述发光器件的密度小于所述第二显示区内所述发光器件的密度。
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