WO2020077498A1 - Dispositif émettant de la lumière, dispositif de détection de caractéristique biométrique, et appareil électronique - Google Patents

Dispositif émettant de la lumière, dispositif de détection de caractéristique biométrique, et appareil électronique Download PDF

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Publication number
WO2020077498A1
WO2020077498A1 PCT/CN2018/110276 CN2018110276W WO2020077498A1 WO 2020077498 A1 WO2020077498 A1 WO 2020077498A1 CN 2018110276 W CN2018110276 W CN 2018110276W WO 2020077498 A1 WO2020077498 A1 WO 2020077498A1
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WIPO (PCT)
Prior art keywords
light
guide structure
light source
light guide
emitting device
Prior art date
Application number
PCT/CN2018/110276
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English (en)
Chinese (zh)
Inventor
徐兴浪
Original Assignee
深圳市汇顶科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市汇顶科技股份有限公司 filed Critical 深圳市汇顶科技股份有限公司
Priority to PCT/CN2018/110276 priority Critical patent/WO2020077498A1/fr
Priority to CN201880002038.9A priority patent/CN109478236A/zh
Publication of WO2020077498A1 publication Critical patent/WO2020077498A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side

Definitions

  • the embodiments of the present application relate to the field of electronic technology, and more specifically, to a light emitting device, a biometric detection device, and an electronic device.
  • the under-screen fingerprint system of a liquid crystal display usually requires an external light source. Since the backlight module of the LCD has a light blocking effect, the external light source can only be placed under the non-display area of the display screen. However, in the context of full-screen display, the non-display area is getting narrower and narrower, resulting in insufficient space below the non-display area to arrange the external light source.
  • the present application provides a light-emitting device, a biometric detection device, and an electronic device.
  • the light-emitting device can be applied to an under-screen fingerprint system for full-screen display on an LCD.
  • a biometric detection device for use in an electronic device having a display screen.
  • the biometric detection device includes:
  • a light emitting device includes a light source and a light guide structure, the light source is used to provide a biometric detection light signal, the light guide device includes a first end and a second end, the light guide device is used to pass from the first end
  • the light source receives the biometric detection optical signal and emits the biometric detection optical signal through the second end, wherein the size of the light source is larger than the size of the second end;
  • the biometrics identification module is arranged below the display screen to detect the return light formed by the target biometric detection light signal emitted from the second end of the light guide device on the target object above the display screen.
  • the returned light is used to detect the biometric information of the target object.
  • the light source is an infrared light source
  • the biometric detection light signal is an infrared light signal
  • the display screen is a liquid crystal display screen, which includes a liquid crystal display module and a backlight module providing a backlight source for the liquid crystal display module, and the biometric recognition module is used to set Below the backlight module, and the biometric detection area of the biometric identification module is at least partially located in the display area of the display screen.
  • the light-emitting device is configured to be arranged side by side with the display screen under the cover of the electronic device, and the light-emitting device does not overlap the display screen.
  • the first end covers at least the light emitting surface of the light source.
  • the size of the first end is greater than or equal to the size of the second end.
  • the axial direction of the first end and the axial direction of the second end form a preset angle.
  • the preset angle is less than or equal to 90 °.
  • the light source is a side light source
  • the axial direction of the first end forms a first angle with the first direction
  • the axial direction of the first end forms a second angle with the axial direction of the second end
  • the first direction is the axial direction of the middle position of the light guide structure.
  • the light source includes multiple light sources, the first end includes multiple openings corresponding to the multiple light sources, the second end includes an opening, and the biometric detection light signal Shot from the plurality of openings and shot from the one opening.
  • the area of the one opening is greater than or equal to the preset area.
  • the projection of the first end on a plane perpendicular to the axial direction of the first end is a circle or a polygon, and / or the second end is perpendicular to the second end
  • the projection on the axial plane is circular or polygonal.
  • the structure of the first end is a tapered structure.
  • the light guide structure is on at least one section line of the first section, the first end is connected to the second end through a first arc, and the first section is the The cross section where the axial direction of the first end and the axial direction of the second end are located.
  • the center of the circle corresponding to the first arc is located on a side of the first arc away from the center of the light guide structure.
  • the center of the circle corresponding to the first arc is located on the side of the first arc near the center of the light guide structure.
  • the first arc is connected to the second end through a second arc, and the center of the circle corresponding to the second arc is located away from the light guide structure of the second arc Side of the center.
  • the first arc is connected to the second arc by a straight line.
  • the second arc is connected to the second end through at least one line.
  • the at least one connecting line includes a first straight line and a second straight line, and the included angle between the first straight line and the second straight line is greater than a preset included angle.
  • the first straight line is connected to the second straight line through a third arc, and the center of the circle corresponding to the third arc is located near the light guide structure of the third arc Side of the center.
  • the biometric detection device further includes:
  • a lens which is disposed between the light source and the first end, and is used to transmit the biometric detection light signal.
  • the lens is disposed in the first end, or there is a preset gap between the lens and the first end.
  • the lens is a concave lens, or the lens is a convex lens.
  • the lens is a hemispherical lens, and the convex surface of the hemispherical lens is disposed toward the first end, or the convex surface of the hemispherical lens is disposed toward the light source.
  • the light guide structure is fixedly connected to the light source.
  • the biometric detection device is applied to an electronic device, the light source and / or the light guide structure are fixedly installed on a middle frame of the electronic device, and at least a part of the light source is located on the Below the backlight module of the display screen, the second end of the light guide structure is disposed below the frame of the display screen.
  • a light emitting device including:
  • Infrared light source used to emit infrared light signal
  • a light guide structure the light guide structure includes a first end and a second end, the light guide structure is used to receive the infrared light signal through the first end, and the infrared light through the second end The signal is emitted, wherein the size of the infrared light source is larger than the size of the second end.
  • the first end covers at least a light emitting surface of the infrared light source.
  • the size of the first end is greater than or equal to the size of the second end.
  • the axial direction of the first end and the axial direction of the second end form a preset angle.
  • the preset angle is less than or equal to 90 °.
  • the infrared light source is a side light source
  • the axial direction of the first end forms a first angle with the first direction
  • the axial direction of the first end forms a second angle with the axial direction of the second end Angle
  • the first direction is the axial direction of the middle position of the light guide structure.
  • the infrared light source includes multiple light sources, the first end includes multiple openings corresponding to the multiple light sources, and the second end includes an opening, and the infrared light signal is from The plurality of openings are shot in and out from the one opening.
  • the area of the one opening is greater than or equal to the preset area.
  • the projection of the first end on a plane perpendicular to the axial direction of the first end is a circle or a polygon, and / or the second end is perpendicular to the second end
  • the projection on the axial plane is circular or polygonal.
  • the structure of the first end is a tapered structure.
  • the light guide structure is on at least one section line of the first section, the first end is connected to the second end through a first arc, and the first section is the The cross section where the axial direction of the first end and the axial direction of the second end are located.
  • the center of the circle corresponding to the first arc is located on a side of the first arc away from the center of the light guide structure.
  • the center of the circle corresponding to the first arc is located on the side of the first arc near the center of the light guide structure.
  • the first arc is connected to the second end through a second arc, and the center of the circle corresponding to the second arc is located away from the light guide structure of the second arc Side of the center.
  • the first arc is connected to the second arc by a straight line.
  • the second arc is connected to the second end through at least one line.
  • the at least one connecting line includes a first straight line and a second straight line, and the included angle between the first straight line and the second straight line is greater than a preset included angle.
  • the first straight line is connected to the second straight line through a third arc, and the center of the circle corresponding to the third arc is located near the light guide structure of the third arc Side of the center.
  • the light emitting device further includes:
  • a lens which is disposed between the infrared light source and the first end, and is used to transmit the infrared light signal.
  • the lens is disposed in the first end, or there is a preset gap between the lens and the first end.
  • the lens is a concave lens, or the lens is a convex lens.
  • the lens is a hemispherical lens, and the convex surface of the hemispherical lens is disposed toward the first end, or the convex surface of the hemispherical lens is disposed toward the infrared light source.
  • the light guide structure is fixedly connected to the infrared light source.
  • the light emitting device is applied to an electronic device, the infrared light source and / or the light guide structure are fixedly installed on a middle frame of the electronic device, and at least a part of the infrared light source is located on the Below the backlight module of the display screen, the second end of the light guide structure is disposed below the frame of the display screen.
  • an electronic device including:
  • the display and
  • the light emitting device according to the second aspect and any possible implementation manner of the second aspect; wherein the infrared light source in the light emitting device is located below the display screen, and the light guide structure in the light emitting device is at least partially Located below the frame of the display screen.
  • the electronic device further includes:
  • the infrared light source and / or the light guide structure are fixedly mounted on the middle frame, and at least a part of the infrared light source is located under the backlight module of the display screen.
  • the two ends are arranged below the frame of the display screen.
  • the electronic device further includes:
  • An optical wedge is provided between the display screen and the light guide structure, for changing the direction of the infrared light signal emitted from the light guide structure, and / or the optical wedge is used for the light guide structure
  • the dispensing area pasted to the cover of the electronic device.
  • the electronic device further includes:
  • the fingerprint identification module is arranged below the display screen;
  • the fingerprint recognition module is used to receive the infrared light signal emitted by the light emitting device after illuminating the human finger, and the infrared light signal is used to detect the fingerprint information of the finger.
  • the display screen is a liquid crystal display screen, and the width of the dispensing area of the display screen is smaller than the minimum width of the projection of the infrared light source in the light emitting device on the display screen.
  • the light emitting device when the light emitting device is installed in an electronic device with an LCD, by ensuring that the size of the infrared light source of the light emitting device is larger than the size of the signal output end of the light guide structure in the light emitting device, the infrared At least a part of the light source is installed below the display screen of the LCD, and the infrared light signal emitted by the infrared light source is guided below the frame of the display screen through the light guide structure, thereby realizing the full-screen display of the LCD Under-screen biometric recognition.
  • FIG. 1 is a schematic plan view of an electronic device to which this application can be applied.
  • FIG. 2 is a schematic cross-sectional view of the electronic device shown in FIG. 1 along A'-A '.
  • FIG. 3 is a schematic side cross-sectional view of an electronic device according to an embodiment of the present application.
  • FIG. 4 is a schematic side cross-sectional view of a light-emitting device according to an embodiment of the present application.
  • FIG. 5 is a schematic side cross-sectional view of an electronic device including the light-emitting device shown in FIG. 4.
  • FIG. 6 is a schematic side cross-sectional view of a light emitting device according to another embodiment of the present application.
  • FIG. 7 is a schematic perspective view of the light emitting device shown in FIG. 6.
  • FIG. 8 is a schematic side sectional view of an electronic device including the light emitting device shown in FIG. 6.
  • FIG. 9 is a schematic side cross-sectional view of an electronic device according to another embodiment of the present application.
  • FIG. 10 is a schematic side cross-sectional view of an electronic device according to still another embodiment of the present application.
  • FIG. 11 is a schematic side cross-sectional view of a light emitting device according to still another embodiment of the present application.
  • FIG. 12 is a schematic side cross-sectional view of an electronic device according to still another embodiment of the present application.
  • FIG. 13 is a schematic diagram of a structure formed by disposing a hemispherical lens in a light guide structure in the electronic device shown in FIG. 12.
  • FIG. 14 is another schematic diagram of a structure formed by disposing a hemispherical lens in a light guide structure in the electronic device shown in FIG. 12.
  • 15 is a schematic side cross-sectional view of an electronic device according to still another embodiment of the present application.
  • FIG. 16 is a side view of the light guide structure in the electronic device described in FIG. 15.
  • FIG. 17 is a side view in which the first port of the light guide structure shown in FIG. 16 is provided as a tapered structure.
  • 18 is a side view of a light guide structure of another embodiment of the present application.
  • 19 is a partial side view of a light guide structure according to still another embodiment of the present application.
  • biometric recognition can also be other biometric recognition
  • living body identification etc.
  • this embodiment of the present application is not limited thereto.
  • the following will first introduce the off-screen biometric recognition technology.
  • under-display Under-display or Under-screen biometric recognition technology
  • biometric recognition modules such as fingerprint recognition modules
  • the off-screen biometric recognition technology uses light returned from the top surface of the display component of the device to perform fingerprint sensing and other sensing operations.
  • the returned light carries information of objects (such as fingers) in contact with the top surface, and a specific optical sensor module located below the display screen is realized by collecting and detecting the returned light.
  • the design of the optical sensor module may be to achieve the desired optical imaging by appropriately configuring the optical elements for collecting and detecting the returned light.
  • FIGS. 1 and 2 show schematic diagrams of an electronic device 100 to which the off-screen biometric recognition technology can be applied.
  • FIG. 1 is a schematic front view of the electronic device 100
  • FIG. 2 is the electronic device 100 shown in FIG. 1 along A′-A. 'Partial cross-sectional structure diagram.
  • the electronic device 100 may include a display screen 120 and a biometrics identification module 140, wherein the display screen 120 has a display area 102, and the biometrics identification module 140 is disposed on the display Below the screen 120.
  • the display screen 120 may be a self-luminous display screen, which uses a display unit with self-luminescence as display pixels.
  • the display screen 120 may be an organic light-emitting diode (Organic Light-Emitting Diode, OLED) display screen or a micro-LED display screen.
  • OLED Organic Light-Emitting Diode
  • the display screen 120 may also be a liquid crystal display (Liquid Crystal Display, LCD) or other passive light-emitting display screen, which is not limited in the embodiments of the present application.
  • the display screen 120 is specifically a touch display screen, which can not only display images, but also detect the user's touch or press operation, thereby providing a human-computer interaction interface for the user.
  • the electronic device 100 may include a touch sensor, and the touch sensor may specifically be a touch panel (Touch Panel, TP), which may be provided on the surface of the display screen 120, or may be partly It is integrated or integrated into the display screen 120 to form the touch display screen.
  • Touch Panel Touch Panel
  • the biometric identification module 140 may be specifically an optical biometric identification module, such as an optical fingerprint module, which is mainly used to collect biometric information (such as fingerprint image information) of a user.
  • the biometric identification module 140 may be provided at least in a partial area below the display screen 120, so that the biometric collection area (or sensing area) 130 of the biometric identification module 140 At least partially located in the display area 102 of the display screen 120.
  • the biometric recognition module 140 may include an optical image acquisition device, and the optical image acquisition device may include multiple optical image acquisition units, and the optical image acquisition unit may specifically include a photodetector or a photoelectric sensor.
  • the optical image acquisition device of the biometric identification module 140 may include a photodetector array (or called photodetector array, photoelectric sensor array), which includes a plurality of arrayed distributions Photodetector / photoelectric sensor.
  • the optical image acquisition device of the biometric recognition module 140 may include an optical biometric sensor with an optical sensing array, such as an optical fingerprint sensor; the optical sensing array includes multiple optical sensing units, and the optical sensing unit It may specifically include a light detector or a photoelectric sensor, and the area or the light sensing range of the optical sensing array corresponds to the biometric collection area 130 of the biometric identification module 140.
  • the biometric collection area 130 is located in the display area 102 of the display screen 120. Therefore, when the user needs to unlock the electronic device 100 or verify other biometrics, he only needs to change Pressing the finger on the biometrics collection area 130 located on the display screen 120 can realize the biometric input operation.
  • the electronic device 100 Since the biometrics collection and detection can be implemented within the display area 102 of the display screen 120, the electronic device 100 adopting the above structure does not require a special reserved space on the front of it to set fingerprint buttons (such as the Home button), so a full screen solution can be adopted. Therefore, the display area 102 of the display screen 120 can be substantially extended to the entire front surface of the electronic device 100.
  • the biometrics identification module 140 may use an external light source as an excitation light source for biometrics detection and identification.
  • the light emitted by the external light source transmits through the finger and forms transmitted light, wherein the The transmitted light can carry the biometric information of the user's finger.
  • the transmitted light returns to the display screen 120 and is received by the photodetector array of the biometric identification module 140 below it and converted into a corresponding electrical signal, that is, a biometric detection signal.
  • the electronic device 100 can obtain the user's biometric information based on the biometric detection signal, and can further perform biometric matching verification to complete the identity verification of the current user in order to confirm whether he has the authority to the electronic device 100 Take the appropriate action.
  • the biometric identification module 140 may also be disposed in the entire area below the display screen 120, thereby extending the biometric collection area 130 to the entire display area of the entire display screen 120 102. Realize full-screen biometric identification.
  • the electronic device 100 further includes a protective cover 110, and the cover 110 may be specifically a transparent cover, such as a glass cover or a sapphire cover, which is located on the display screen 120 And cover the front of the electronic device 100, and a protective layer may be provided on the surface of the protective cover 110. Therefore, in the embodiment of the present application, the so-called finger pressing on the display screen 120 may actually mean that the finger presses the cover plate 110 above the display screen 120 or covers the surface of the protective layer of the cover plate 110.
  • a circuit board 150 such as a flexible printed circuit (Flexible Printed Circuit, FPC) or a printed circuit board (Printed Circuit Board, PCB), may also be disposed under the biometric identification module 140.
  • the feature recognition module 140 may be soldered to the circuit board 150 through pads, and realize electrical interconnection and signal transmission with other peripheral circuits or other elements of the electronic device 100 through the circuit board 150.
  • the biometric identification module 140 may receive the control signal of the processing unit of the electronic device 100 through the circuit board 150, and may also output the biometric detection signal to the The processing unit or control unit of the electronic device 100 and the like.
  • the image acquisition unit in the biometric identification module 140 can not only be applied to non-self Light-emitting display screens, such as LCD or other passive light-emitting display screens, can also be applied to self-luminous display screens such as OLED display screens.
  • the external light source needs to be disposed below the non-display area of the non-self-luminous display screen, or the external light source needs to be installed
  • the dispensing area below the non-display area of the non-self-luminous display may also be referred to as the periphery of the display screen or the border of the display screen.
  • FIG. 3 shows a schematic block diagram of an electronic device 200 with a non-self-luminous display screen to which the off-screen biometric recognition technology can be applied.
  • the electronic device 200 may include a cover 211, a display module 212 and a backlight module 213.
  • the cover plate 211, the display module 212 and the backlight module 213 may form a non-self-luminous display screen of the electronic device 200.
  • the non-display area of the display screen may also be referred to as the non-display area of the cover plate 211 or the frame of the cover plate 211.
  • the backlight module 213 is used to supply the display module 212 with sufficient brightness and uniformly distributed light sources, so that the display module 212 can display images normally.
  • the cover 211 serves as an image display interface. Further, when the display module 212 is specifically a display touch module, the cover 211 can also be used as a touch operation interface for the human finger 210.
  • the electronic device 200 may further include a biometric identification module 220 and an external light source 230, wherein the external light source 230 is used to emit an optical signal for biometric detection and identification.
  • the biometrics identification module 220 is used to receive the optical signal 233 emitted by the external light source 230 and formed by transmission through the human finger 210, and obtain biometric information of the finger 210 according to the optical signal 233, for example, the finger 210 fingerprint images.
  • the external light source 230 needs to be disposed below the non-display area 250 of the cover plate 211, specifically, the external light source 230 is disposed on the The dispensing area in the non-display area 250.
  • the display module 212 may be disposed below the display area and part of the non-display area of the cover plate 211, the backlight module 213 is disposed below the display module 212, and the biometric recognition The module 220 is disposed below the backlight module 213.
  • the external light source 230 is disposed below the cover plate 231, and the optical signal emitted by the external light source 230 may be It is directly transmitted to the finger 210 through the cover plate 211 and transmitted through the finger 210 to form a transmitted light signal for fingerprint recognition.
  • the technical solution of the embodiment of the present application avoids that the optical signal emitted by the external light source 230 is in the backlight module 213 and The transmission loss in the display module 212 effectively reduces the loss of the optical signal emitted by the external light source 230 during the transmission process.
  • biometrics identification module 220 is disposed under the backlight module 213, which can effectively separate the emission path of the external light source 230 and the reception path of the biometrics identification module 220, which can effectively The amount of fingerprint information carried by the optical signal received by the biometric identification module 220 is increased.
  • the technical solutions of the embodiments of the present application can effectively improve the recognition effect of biometric recognition.
  • the optical signal received by the biometric identification module 220 for biometric identification may be optical processing of the optical signal emitted by the external light source 230 by a human finger 210 Optical signal.
  • the optical signal received by the biometric identification module 220 may be the optical signal that passes through the backlight module 213 after being transmitted through the human finger 210. This embodiment of the present application does not specifically limit this.
  • the electronic device 200 may further include a connection circuit 231 connected to the external light source 230, the connection circuit 231 is used to receive a control signal, and the control signal is used to control the external power supply 230 shine or not shine.
  • the connection circuit 231 may be a circuit board.
  • printed circuit board Printed Circuit Board, PCB
  • flexible circuit board Flexible Printed Circuit, FPC.
  • the backlight module 213 may include a composite film, a light enhancement film, a diffusion film, and a light guide plate in order from top to bottom.
  • the visible light emitted by the visible light source is transmitted to the diffusion film after passing through the light guide plate, and the light diffused through the diffusion film is transmitted to the light enhancement film, and the light enhancement film is used to gain the received optical signal, and
  • the optical signal after gain is sent to a composite film, which is used to further gain the received optical signal, and transmit the optical signal after gain to the display screen for image display.
  • the backlight module 213 may further include a steel plate and / or a reflective film, and the reflective film may be disposed under the light guide plate, and used to direct the visible light source to emit visible light in a direction opposite to the display module 212 It is reflected back to the light guide plate, thereby improving the utilization rate of the light emitted by the visible light source, and the steel plate is used to block the light emitted by the visible light source from being emitted in the opposite direction to the display module 212.
  • the external light source 230 is an infrared light source. It should be noted that the infrared light signal emitted by the infrared light source is invisible light.
  • the light signal used for the image display of the display module 212 is visible light.
  • the visible light may be light emitted by any light source located behind a liquid crystal display (LCD).
  • the visible light source may be an electroluminescence (EL) backlight, a small cold cathode fluorescent lamp (CCFL), or an LED backlight.
  • EL electroluminescence
  • CCFL small cold cathode fluorescent lamp
  • the optical signal used for biometric identification is an invisible light signal
  • the optical signal used for displaying an image is a visible light signal, an invisible light signal used for biometric identification, and an image used for displaying an image.
  • Visible light signals can avoid affecting each other. That is, the embodiments of the present application can effectively perform biometric recognition while ensuring that the image is displayed normally.
  • the haze when the infrared light signal passes through the backlight module 213 is less than the haze when the visible light for displaying an image passes through the backlight module 213.
  • the backlight module 213 can not only realize the modulation of the visible light signal, but also effectively reduce the loss of the infrared light signal in the transmission of the optical path.
  • the haze when the infrared light signal passes through the diffusion layer in the backlight module 213 is smaller than the haze when the visible light used for displaying an image passes through the diffusion layer.
  • the transmittance of the infrared light signal when passing through the backlight module 213 may also be greater than the transmittance of visible light used for displaying images when passing through the backlight module 213.
  • the transmittance of the infrared light signal when passing through the diffusion layer is greater than the transmittance of the visible light when passing through the diffusion layer.
  • the transmittance of the infrared light signal passing through the reflective layer of the backlight module 213 is greater than the transmittance of visible light used for displaying an image when passing through the reflective layer. It can be found that during the image realization process, the diffusion plate can not only increase the brightness of the front of the display module 212, but also make the distribution of visible light more uniform, thereby ensuring that the user will not see the reflection point from the front.
  • the haze when the infrared light signal passes through the diffusion layer is less than the haze when the visible light used to display the image passes through the diffusion layer, and the infrared light signal passes through the
  • the light transmittance of the diffusion layer is greater than the light transmittance of the visible light passing through the diffusion layer, which can effectively reduce the loss of the infrared light signal in the transmission of the optical path, thereby improving the identification effect of biological features.
  • the steel plate may be formed with an opening, and the biometric identification module 220 may be disposed below the opening, so that the biometric identification module 220 After receiving the infrared light signal emitted by the external light source 230 and illuminating a human finger and passing through the opening.
  • the opening can prevent the visible light signal from being transmitted in the opposite direction to the display module 212 as much as possible, and prevent the backlight module 213 from being damaged due to external impact, and can effectively reduce the infrared light signal used for biometric identification.
  • the energy loss when passing through the steel plate further improves the biometrics identification effect.
  • biometric identification module 220 shown in FIG. 3 are similar to those of the biometric identification module 140 shown in FIG. 2 and other figures 2. To avoid repetition, they are not described here.
  • the electronic device 200 may further include a middle frame 240, and the middle frame 240 may be any frame or structure for supporting the electronic device 200.
  • the biometric identification module 220 When the biometric identification module 220 is disposed below the non-display area 250 of the cover plate 211, it can be directly pasted on the lower surface of the cover plate 211, or can be fixed to the cover by the middle frame 240 Below the plate 211. This embodiment of the present application does not specifically limit this.
  • the cover plate 211 may be fixedly connected to the middle frame 240, and there is a gap between the display module 212 located under the cover plate 211 and the middle frame ( That is, the dispensing area of the cover plate 211), the external light source 230 is disposed in the gap (dispensing area).
  • the width 250 of the frame of the cover 221 includes the width 251 occupied by the external light source 230, part of the display module 212, and part of the width 252 occupied by the middle frame 240.
  • the dispensing area in the width 250 of the cover plate 211 needs to be set narrower and narrower, which in turn causes the width 251 to be smaller than installing the external The required width of the light source 230, that is to say, there will not be enough space under the frame of the cover plate 211 to arrange the external light source 230.
  • the embodiments of the present application provide an improved light-emitting device, which can be applied to off-screen biometrics collection or recognition under a full-screen display of a non-self-luminous display screen.
  • the light emitting device may include: an infrared light source for emitting an infrared light signal; a light guide structure, the light guide structure includes a first end and a second end, and the light guide structure is used for passing the first The end receives the infrared light signal and emits the infrared light signal through the second end, wherein the size of the infrared light source is larger than the size of the second end.
  • the light-emitting device When the light-emitting device is installed in an electronic device with a non-self-luminous display screen, by ensuring that the size of the infrared light source of the light-emitting device is larger than the size of the signal output end of the light guide structure in the light-emitting device, the infrared light source At least a part of it is installed under the display screen, and the infrared light signal emitted by the infrared light source is guided under the frame of the display screen through the light guide structure, thereby realizing the full-screen display of the non-self-luminous display screen Biometric recognition under the screen.
  • the size of the infrared light source may refer to the size of the device including the infrared light source.
  • the size of the infrared light source may refer to the size formed by the infrared light source and the circuit board.
  • FIGS. 4 to 19 show schematic diagrams of the light-emitting device of the embodiment of the present application and the electronic device 300 to which the light-emitting device can be applied.
  • the light-emitting device in the embodiment of the present application will be described in detail with reference to FIGS. 4 to 19 in the following, taking the light-emitting device as an example of applying on-screen fingerprint recognition of an LCD full-screen display.
  • FIG. 4 shows a side cross-sectional view of a light-emitting device according to an embodiment of the present application.
  • FIG. 5 is a schematic side sectional view of the electronic device 300 including the light emitting device shown in FIG. 4.
  • the light emitting device may include: an infrared light source 330 and a light guide structure 361.
  • the infrared light source 330 may be the external light source 230 shown in FIG. 3, and the infrared light source 330 is used to emit an infrared light signal.
  • the infrared light source 330 may include an external light source 331 and a circuit board 332.
  • the circuit board 332 may be a printed circuit board (Printed Circuit Board, PCB) or a flexible circuit board (Flexible Printed Circuit, FPC).
  • the light guide structure 361 includes a first end and a second end.
  • the light guide structure 361 is used to receive the infrared light signal through the first end and emit the infrared light signal through the second end .
  • the first end is the input end of the infrared light signal of the light guide structure 361
  • the second end is the output end of the infrared light signal of the light guide structure 361.
  • the size of the infrared light source 330 is larger than the size of the second end.
  • the electronic device 300 may include a cover 311, a display module 312, a backlight module 313 and a biometrics identification module 320.
  • the cover plate 331 may be the cover plate 211 shown in FIG. 3
  • the display module 312 may be the display module 212 shown in FIG. 3
  • the backlight module 313 may be the one shown in FIG. 3
  • the biometrics identification module 320 may be the biometrics identification module 220 shown in FIG. 3, and in order to avoid repetition, it will not be repeated here.
  • the infrared light source 330 when the infrared light source 330 is installed in an electronic device with an LCD, by ensuring that the size of the infrared light source 330 is larger than the size of the second end of the light guide structure 361, at least a portion of the infrared light source 330 can be installed Under the LCD (that is, the non-dispensing area of the cover plate, which can be specifically installed under the display module), and the infrared light signal emitted by the infrared light source 330 is guided to the Below the frame of the LCD, the on-screen biometric identification under the full-screen display of the LCD is realized. As shown in FIG.
  • the infrared light source 330 may be installed under the backlight module 313, that is, the infrared light source 330 needs to occupy a larger space than the dispensing area of the cover plate 311,
  • the infrared light source 330 needs to occupy a larger space than the dispensing area of the cover plate 311,
  • by moving the infrared light source 330 below the backlight module 313, and transmitting the infrared light signal emitted by the infrared light source 330 to the cover plate 311 through the light guide structure 361 Under the frame avoiding the infrared light signal transmitted by the infrared light source 330 through the backlight module 313, which can effectively reduce the loss of the infrared light signal emitted by the infrared light source 330 in the transmission path, thereby improving the biological characteristics Identify the effect.
  • the side cross-sectional view of the light guide structure 361 may be square.
  • the light guide structure 361 may be a cylindrical structure, a square pillar structure, or the like.
  • the light guide structure 361 may also be a structure formed by combining a cylindrical structure and a square pillar structure.
  • the embodiments of the present application are not limited to this.
  • the light guide structure 361 may be a solid structure.
  • the light guide structure 361 may be provided with a cavity, and the cavity is used to transmit infrared light signals.
  • the size of the infrared light source 330 may be the minimum width of the infrared light source 330 along the first direction, wherein the first direction may be a direction parallel to the plane where the LCD is located and perpendicular to the frame of the LCD.
  • the size of the infrared light source 330 may be the minimum width of the device formed by the external light source 331 and the circuit board 332 along the first direction.
  • the size of the infrared light source 330 may be the minimum width of the external light source 331 and the inflexible portion of the circuit board 332 along the first direction.
  • the size of the infrared light source 330 may be the width of the infrared light source 330 as shown in FIG. 5.
  • the size of the second end may be the smallest width of the second end in the first direction.
  • the size of the second end may be the width of the light guide structure 361 shown in FIG. 5.
  • the first end of the light guide structure 361 covers at least the light emitting surface of the infrared light source 330.
  • the first end of the light guide structure 361 can receive a sufficient infrared light signal.
  • the present application does not limit the specific position where the first end covers the infrared light source 330.
  • the first end completely covers the light emitting surface of the infrared light source 330.
  • the first end covers the center position of the light emitting surface of the infrared light source 330.
  • the embodiment of the present application does not limit the specific installation method.
  • the light guide structure 361 and the infrared light source 330 may be installed separately.
  • the light guide structure 361 and the infrared light source 330 may be respectively installed on the middle frame 340 of the electronic device 300.
  • the embodiments of the present application are not limited to this.
  • the light guide structure 361 and the infrared light source 330 are fixedly connected, and then the light guide structure 361 and the infrared light source 330 are fixedly connected by means of fixed connection Go to the middle frame 340.
  • the electronic device 300 may further include a modulation structure 370 for receiving and modulating the infrared light signal emitted by the infrared light source 330 and sending the modulated infrared light signal to all The first end of the light guide structure 361.
  • the modulation structure 370 may be a lens, such as a spherical lens or a hemispherical lens, and for example, a convex lens or a concave lens.
  • the modulation structure 370 may be fixedly connected to the light guide structure 361, or may be fixedly connected to the infrared light source 330.
  • the embodiments of the present application are not limited to this. For example, as shown in FIG.
  • the modulation structure 370 may be provided separately from the light guide structure 361, and the modulation structure 370 may be provided separately from the infrared light source 330.
  • the modulation structure 370 may be fixedly installed on the middle frame 340 of the electronic device 300.
  • the electronic device 300 may further include an optical wedge 380 for changing infrared light output from the second end (ie, infrared light signal output end) of the light guide structure 361
  • the direction of the signal, and / or, the optical wedge 380 is used to paste the light guide structure 361 to the dispensing area of the cover plate 311.
  • the material of the optical wedge 380 may be optical glue.
  • the optical wedge 380 is used to guide the infrared light signal output from the second end to the fingerprint collection area of the cover plate 311.
  • a transmitted light signal 333 as shown in FIG. 5 is formed.
  • the biometric identification module 320 is used to receive the transmitted light signal 333 and perform biometric identification according to the transmitted light signal 333. For example, fingerprint recognition.
  • the light emitting device shown in FIG. 4 or the electronic device 300 shown in FIG. 5 may further include a visible light filter.
  • the visible light filter may be disposed between the backlight module 313 and the biometrics recognition module 320. Thereby, the visible light transmitted to the visible light filter can be filtered, and the recognition quality of the biometric recognition module 320 can be further improved.
  • the visible light filter may specifically be used to filter out visible light wavelengths, for example, visible light used for image display.
  • the optical filter may specifically include one or more optical filters, which may be configured as, for example, a band-pass filter to filter out the light emitted by the visible light source without filtering out the infrared light signal .
  • the one or more optical filters may be implemented as, for example, an optical filter coating formed on one or more continuous interfaces, or may be implemented on one or more discrete interfaces.
  • the visible light filter may be fabricated on the surface of any optical component, or along the optical path to the biometric recognition module 320 through the transmitted light formed by the finger transmission.
  • the visible light filter may be attached to the bottom surface of the display module 312, the steel plate in the backlight module 313, or the inside of the biometric identification module 320.
  • the side cross-sectional view of the light guide structure 361 shown in FIG. 5 is a square structure.
  • the embodiments of the present application are not limited to this.
  • the side cross-sectional view of the light guide structure 361 may be a deformed structure of a square structure.
  • the size of the first end of the light guide structure 361 shown in FIG. 5 is the same as the size of the second end of the light guide structure.
  • the embodiments of the present application are not limited to this.
  • the size of the first end may be greater than the size of the second end.
  • the size of the first end may be smaller than the size of the second end.
  • the axial direction of the first end of the light guide structure 361 shown in FIG. 5 is the same as the axial direction of the second end of the light guide structure 361.
  • the embodiments of the present application are not limited to this.
  • the axial direction of the first end and the axial direction of the second end form a preset angle.
  • the preset angle may be formed between the direction of the infrared light signal received by the light guide structure and the direction of the infrared light signal output by the light guide structure.
  • the preset angle may be less than or equal to 90 °.
  • the infrared light source 330 shown in FIG. 5 is a positive emission source.
  • the embodiments of the present application are not limited to this.
  • the embodiments of the present application are not limited to this.
  • the light-emitting source 331 may be a side-emitting light source.
  • the first end of the light guide structure 361 shown in FIG. 5 includes only one opening.
  • the embodiments of the present application are not limited to this.
  • the first end may include multiple openings.
  • the infrared light source 330 includes a plurality of light sources
  • the first end includes a plurality of openings corresponding to the plurality of light sources
  • the second end includes an opening
  • the infrared light signal from the plurality of light sources The opening is shot in and out from the one opening.
  • FIG. 6 shows a side cross-sectional view of a light emitting device according to another embodiment of the present application.
  • 7 is a schematic perspective view of the light emitting device described in FIG. 6.
  • 8 is a schematic side cross-sectional view of an electronic device 300 including the light emitting device shown in FIG. 6.
  • the light emitting device may include a light guide structure 362 and an infrared light source 330.
  • a corner is formed, and this corner can make the light guide
  • the infrared light signal output from the second end of the structure 362 directly faces the sensing area or the collecting area of the cover plate 311.
  • this corner can make the infrared light signal output from the second end of the light guide structure 362 directly face the finger 310 on the cover plate 311.
  • the opening of the second end of the light guide structure 362 faces the finger 310.
  • the light guide structure 362 enables the electronic device 300 to avoid using additional components to adjust the direction of the infrared light signal output from the second end of the light guide structure 362, thereby effectively simplifying the structure of the electronic device 300, and Reduced production costs.
  • FIGS. 6 to 8 are only examples of embodiments of the present application, and should not be construed as limiting the embodiments of the present application.
  • the axial direction of the first end and the axial direction of the second end may directly form an angle.
  • the embodiments of the present application are not limited to this.
  • the axial direction of the first end may first form a first angle with the first direction, and then the first direction and the first The axial directions of the two ends form a second angle, wherein the first direction is the axial direction of the middle position of the light guide structure.
  • FIG. 9 is a schematic side sectional view of an electronic device 300 including a modified structure of the light emitting device shown in FIG. 6.
  • the electronic device 300 may include a light guide structure 363.
  • a corner is formed, and this corner can cause infrared light output from the second end of the light guide structure 363
  • the optical signal directly faces the sensing area or the collecting area of the cover plate 311.
  • this corner can make the infrared light signal output from the second end of the light guide structure 363 directly face the finger 310 on the cover plate 311.
  • the opening of the second end of the light guide structure 363 faces the finger 310.
  • the light guide structure 363 enables the electronic device 300 to avoid using additional components to adjust the direction of the infrared light signal output from the second end of the light guide structure 362, thereby effectively simplifying the structure of the electronic device 300, and Reduced production costs.
  • the size may gradually decrease.
  • the outer diameter of the light guide structure 363 gradually decreases as the first end extends toward the second end.
  • the size of the first end of the light guide structure 363 is larger than the size of the second end of the light guide structure 363.
  • the position of the corner on the side of the light guide structure 363 close to the display module 312 or close to the backlight module 313 is higher than the The position on the light guide structure 363 near the corner of the middle frame 340.
  • the space that the light guide structure 363 needs to occupy can be effectively reduced, and thus it can be applied to electronic equipment with a very narrow frame of the cover plate.
  • FIG. 9 is only an example of an embodiment of the present application, and should not be understood as a limitation of the embodiment of the present application.
  • the size of the first end is located between the display module 313 and the middle frame 340
  • the outer diameter of the light guide structure 363 is the same.
  • the embodiments of the present application are not limited to this.
  • the size of the first end may be the same as the outer diameter of the light guide structure 363 between the display module 313 and the middle frame 340.
  • FIG. 10 is a schematic side sectional view of an electronic device 300 including another modified structure of the light emitting device shown in FIG. 6.
  • the electronic device 300 may include a light guide structure 364.
  • the first end of the light guide structure 364 is a tapered structure.
  • the larger-sized opening of the tapered structure is used to align the infrared light source 330, thereby ensuring that the light guide structure 364 can receive a sufficient infrared light signal.
  • FIG. 10 is only an example of an embodiment of the present application, and should not be construed as limiting the embodiment of the present application.
  • the first end of the light guide structure 364 shown in FIG. 10 and the middle portion of the light guide structure 364 are connected by an obtuse angle.
  • the embodiments of the present application are not limited to this.
  • the first end of the light guide structure 364 and the middle portion of the light guide structure 364 may also be connected by an arc.
  • the light guide structure 364 is on at least one section line of the first section, and the first end is connected to the second end through a first arc, the first The cross section is a cross section where the axial direction of the first end and the axial direction of the second end are located.
  • FIG. 11 is a schematic perspective view of a light guide structure 365 according to an embodiment of the present application.
  • the light guide structure 365 may be a semi-L structure.
  • the flat side of the light guide structure 365 may be connected to the middle frame 340.
  • the non-flat side of the light guide structure 365 can be disposed close to the display module 312 or the backlight module 313 shown in FIG. 10.
  • the light guide structure 365 is on the first section line of the first section, the first end is connected to the second end through a first arc, and the center of the circle corresponding to the first arc is located at the The side of the first arc away from the center of the light guide structure.
  • the first cross-section is a cross-section where the axial direction of the first end and the axial direction of the second end are located, and the first cross-sectional line is a display module on the first cross-section that is close to the display module shown in FIG. 312 or the hatching on one side of the backlight module 313.
  • FIG. 11 is only an example of an embodiment of the present application, and should not be understood as a limitation of the embodiment of the present application.
  • the light guide structure is on a first section line of a first section, the first end is connected to the second end through a first arc, and the first arc The corresponding circle center is located on the side of the first arc near the center of the light guide structure.
  • the first arc is connected to the second end through a second arc, and the center of the circle corresponding to the second arc is located on a part of the second arc away from the center of the light guide structure side.
  • the first arc is connected to the second arc by a straight line.
  • the second arc is connected to the second end through at least one line.
  • the at least one connecting line includes a first straight line and a second straight line, and the angle between the first straight line and the second line is greater than a preset angle.
  • the first straight line is connected to the second straight line through a third arc, and the center of the circle corresponding to the third arc is located on a side of the third arc near the center of the light guide structure side.
  • FIG. 12 is a schematic side cross-sectional view of an electronic device 300 according to still another embodiment of the present application.
  • the electronic device 300 may include a light guide structure 366.
  • the shape of the light guide structure 366 may specifically be the shape of a bottle.
  • the bottle mouth serves as the second end of the light guide structure 366 and is used to output an infrared light signal.
  • the bottom of the bottle serves as the first end of the light guide structure 366 and is used to receive the infrared light signal output by the infrared light source 330.
  • FIG. 12 is only an example of an embodiment of the present application, and should not be understood as a limitation of the embodiment of the present application.
  • the light guide structure 366 shown in FIG. 12 is in contact connection with the infrared light source 330.
  • the embodiments of the present application are not limited to this.
  • the infrared light source 330 and the light guide structure 366 may also be fixedly connected to the middle frame 340 in a separated form.
  • the infrared light source 330 and the light guide structure 366 may also be connected by a lens.
  • the lens is disposed between the infrared light source 330 and the first Between the ends, used to transmit the infrared light signal.
  • the lens is disposed in the first end, or there is a preset gap between the lens and the first end.
  • the lens is a concave lens, or the lens is a convex lens.
  • FIG. 13 and 14 are schematic perspective views of a hemispherical lens built into the first end of the light guide structure 367 according to an embodiment of the present application.
  • the convex surface of the hemispherical lens 371 is disposed toward the first end of the light guide structure 367.
  • the flat surface of the hemispherical lens 371 is disposed toward the infrared light source.
  • the flat surface of the hemispherical lens 371 is disposed toward the infrared light source 330 shown in FIG. 12. Therefore, the hemispherical lens 371 can also transmit the large-angle light signal output by the infrared light source 330 to the light guide structure 367, thereby increasing the utilization rate of the infrared light signal emitted by the infrared light source 331.
  • the convex surface of the hemispherical lens 372 is disposed toward the infrared light source.
  • the flat surface of the hemispherical lens 372 is disposed toward the infrared light source 330 shown in FIG. 12.
  • the flat surface of the hemispherical lens 372 is disposed toward the first end of the light guide structure 367.
  • the hemispherical lens 372 can convert the point light source signal output by the infrared light source 330 into a parallel light signal, and transmit the converted parallel light signal to the light guide structure 367, thereby reducing the light signal in The frequency of reflection or refraction in the light guide structure 367, thereby reducing the loss of optical signals transmitted in the light guide structure 367.
  • 15 is a schematic side cross-sectional view of an electronic device 300 according to still another embodiment of the present application. 16 is a schematic perspective view of the light guide structure 368 in the electronic device 300 described in FIG. 15.
  • the electronic device 300 may include an infrared light source 330 and a light guide structure 368, wherein the infrared light source 330 is a side-emitting light source, and the light guide structure 368 may have a 90 ° corner.
  • the light guide structure 368 may be used to convert the infrared light signal emitted by the infrared light source 330 parallel to the cover plate 311 into an infrared light signal perpendicular to the cover plate 311, and output the converted infrared light signal.
  • the light guide structure 368 may be a cylindrical structure.
  • FIG. 16 is only an example of an embodiment of the present application, and should not be understood as a limitation of the embodiment of the present application.
  • the light guide structure 368 may adopt a non-cylindrical structure or a combination structure including multiple structures.
  • the first end of the light guide structure 369 is a tapered structure
  • the second end of the light guide structure 369 is a cylindrical structure.
  • the light guide structure 3610 may be a flat columnar structure.
  • 19 is a partial side view of a light guide structure 3611 of an embodiment of the present application.
  • the light guide structure 3611 may include a first end for receiving infrared light signals and a second end for outputting infrared light signals.
  • the light guide structure 3611 may be a columnar structure. In the process of extending the first end of the light guide structure 3611 toward the second end, a corner of approximately 90 ° is formed, and the inner diameter and the outer diameter gradually decrease.
  • the second end may include a predetermined opening.
  • the preset opening may be an opening formed on a surface of the second end opposite to the first end. More specifically, the periphery of the first opening may extend upward to the same plane.
  • the size of the preset opening may be greater than or equal to a preset value.
  • the area of the preset opening may be greater than or equal to the preset value. It can be found that the preset opening can effectively increase the number of infrared light signals output by the second end.
  • the size of the preset opening can be set large enough to satisfy a large-area screen Under the biometric recognition technology.
  • FIG. 19 is only an example of an embodiment of the present application, and should not be understood as a limitation of the embodiment of the present application.
  • the second end of the light guide structure 3611 may further include multiple openings, and the multiple openings may correspond to multiple biometric identification modules.
  • the light guide structure 3611 may also include other types of structures, or the light guide structure 3611 may also include a structure formed by combining a columnar structure and other types of structures.
  • the light emitting device of the embodiment of the present application may be applied to a biometric detection device.
  • the light emitting device is integrated and installed in the biometric detection device.
  • the biometric detection device may include the light emitting device and the biometric identification module described above, the biometric identification module is used to be disposed under the display screen to detect the second of the light guide device
  • the biometric detection light signal emitted from the end is returned light formed by the target object above the display screen, and the returned light is used for biometric information of the target object.
  • the light source is an infrared light source
  • the biometric detection light signal is an infrared light signal
  • the display screen is a liquid crystal display screen, which includes a liquid crystal display module and a backlight module providing a backlight source for the liquid crystal display module, and the biometric recognition module
  • the group is used to be arranged under the backlight module, and the biometric detection area of the biometric identification module is at least partially located in the display area of the display screen.
  • the light emitting device is configured to be arranged side by side with the display screen under the cover of the electronic device, and the light emitting device does not overlap the display screen.
  • the light-emitting device in the embodiments of the present application can be applied to electronic equipment, especially to electronic equipment having a backlight module.
  • the electronic device may include a display screen and the light emitting device described above; wherein the infrared light source 330 in the light emitting device is located below the display screen, and the light guide structure in the light emitting device is at least partially located in the Below the bezel of the display.
  • the infrared light source 330 may be a positive light source or a side light source.
  • the infrared light source 330 may be disposed below the frame of the display screen.
  • the infrared light source 330 is a side-emitting light source
  • the infrared light source 330 can be arranged below the display area of the display screen. At this time, part of the light guide structure can be arranged below the display area. A part of the light guide structure may be disposed below the frame.
  • the infrared light source 330 and / or the light guide structure are fixedly installed on the middle frame of the electronic device, and at least a part of the infrared light source 330 is located under the backlight module of the display screen, the light guide structure The second end of is located below the bezel of the display screen. In this way, the infrared light signal emitted by the infrared light source 330 is guided below the frame of the display screen through the light guide structure, thereby achieving off-screen biometric identification of a full-screen display.
  • the electronic device may further include:
  • An optical wedge is provided between the display screen and the light guide structure, for changing the direction of the infrared light signal emitted from the light guide structure, and / or the optical wedge is used for the light guide structure
  • the dispensing area pasted to the cover of the electronic device may be optical glue.
  • the electronic device further includes:
  • a fingerprint recognition module is provided below the display screen; wherein, the fingerprint recognition module is used to receive an infrared light signal emitted by the light emitting device after illuminating a human finger, and the infrared light signal is used to detect the Fingerprint information.
  • the display screen is a liquid crystal display screen
  • the width of the dispensing area of the display screen is smaller than the projection of the infrared light source 330 of the light emitting device on the display screen The minimum width.
  • the technical solutions of the embodiments of the present application may essentially be 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, and the computer software product is stored in a storage medium , Including several instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application.
  • the foregoing storage media include various media that can store program codes, such as a U disk, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk, or an optical disk.
  • the division of units or modules or components in the device embodiments described above is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or modules or components may be combined or integrated To another system, or some units or modules or components can be ignored, or not implemented.
  • the units / modules / components described as separate / display components may or may not be physically separated, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the units / modules / components may be selected according to actual needs to achieve the objectives of the embodiments of the present application.
  • coupling or direct coupling or communication connection shown or discussed above may be indirect coupling or communication connection through some interfaces, devices or units, and may be electrical, mechanical or other forms .

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Abstract

L'invention concerne un dispositif émettant de la lumière, un dispositif de détection de caractéristique biométrique et un appareil électronique. Le dispositif de détection de caractéristique biométrique comprend : le dispositif émettant de la lumière comprenant une source de lumière (330) et une structure de guidage de lumière (361). La source de lumière (330) fournit un signal lumineux de détection de caractéristique biométrique. La structure de guidage de lumière (361) reçoit le signal lumineux de détection de caractéristique biométrique de la source de lumière (330) par une première extrémité, et émet le signal lumineux de détection de caractéristique biométrique au moyen d'une seconde extrémité. La taille de la source de lumière (330) est supérieure à celle de la seconde extrémité. Un module d'identification de caractéristique biométrique détecte un faisceau lumineux de retour formé par le signal lumineux de détection de caractéristique biométrique incident sur un objet cible sur un écran d'affichage, et le faisceau lumineux de retour est utilisé pour détecter des informations de caractéristique biométrique. Au moins une partie de la source de lumière (330) dans le dispositif de détection de caractéristique biométrique peut être installée sous l'écran d'affichage parce qu'il est garanti que la taille de la source de lumière (330) est supérieure à celle d'une extrémité de sortie de signal de la structure de guidage de lumière (361), et un signal lumineux émis par la source de lumière (330) est dirigé sous un encadrement de l'écran d'affichage par la structure de guidage de lumière (361), ce qui permet d'obtenir une identification de caractéristique biométrique dans l'affichage pour les affichages à écran intégral.
PCT/CN2018/110276 2018-10-15 2018-10-15 Dispositif émettant de la lumière, dispositif de détection de caractéristique biométrique, et appareil électronique WO2020077498A1 (fr)

Priority Applications (2)

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PCT/CN2018/110276 WO2020077498A1 (fr) 2018-10-15 2018-10-15 Dispositif émettant de la lumière, dispositif de détection de caractéristique biométrique, et appareil électronique
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