WO2021081763A1 - 屏下指纹识别装置及电子设备 - Google Patents

屏下指纹识别装置及电子设备 Download PDF

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Publication number
WO2021081763A1
WO2021081763A1 PCT/CN2019/114058 CN2019114058W WO2021081763A1 WO 2021081763 A1 WO2021081763 A1 WO 2021081763A1 CN 2019114058 W CN2019114058 W CN 2019114058W WO 2021081763 A1 WO2021081763 A1 WO 2021081763A1
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WO
WIPO (PCT)
Prior art keywords
detection light
light source
liquid crystal
screen
under
Prior art date
Application number
PCT/CN2019/114058
Other languages
English (en)
French (fr)
Inventor
青小刚
刘文拯
李顺展
Original Assignee
深圳市汇顶科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市汇顶科技股份有限公司 filed Critical 深圳市汇顶科技股份有限公司
Priority to PCT/CN2019/114058 priority Critical patent/WO2021081763A1/zh
Priority to CN201980004031.5A priority patent/CN111066030B/zh
Priority to EP19933212.3A priority patent/EP3846072A4/en
Priority to US17/124,998 priority patent/US20210124199A1/en
Publication of WO2021081763A1 publication Critical patent/WO2021081763A1/zh

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    • 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
    • G02F1/13338—Input devices, e.g. touch panels
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133314—Back frames
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/13332—Front frames
    • 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
    • G02F1/133553—Reflecting elements
    • 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
    • G02F1/133602—Direct backlight
    • 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
    • G06V40/1329—Protecting the fingerprint sensor against damage caused by the finger
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H05K1/189—Printed circuits structurally associated with non-printed electric components characterised by the use of a flexible or folded printed circuit
    • 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
    • G06V40/1341—Sensing with light passing through the finger
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10128—Display
    • H05K2201/10136—Liquid Crystal display [LCD]

Definitions

  • This application relates to the field of display technology, and in particular to an under-screen fingerprint identification device and electronic equipment.
  • OLED Organic Light-Emitting Diode
  • LCD Liquid Crystal Display
  • LCD Liquid Crystal Display
  • the infrared light source is arranged on the chin area of an electronic product such as a mobile phone through a flexible circuit board to perform infrared supplement light, thereby realizing the fingerprint recognition function under the screen.
  • the chin area of the mobile phone is below the edge area of the protective cover of the LCD screen, which is often used as an area for LCD wiring.
  • the infrared light source is set in the chin area of the electronic product through the flexible circuit board and the reinforcing plate, the chin area will increase a certain width. Compared with the chin area of the existing electronic products, the increase in the width of the chin area is relatively high. This makes the reduction of the screen-to-body ratio of the mobile phone more obvious, hindering the realization of the full screen of electronic products.
  • the present application provides an under-screen fingerprint identification device and electronic equipment, which can reduce the increased width of the chin area of the electronic equipment, and contribute to the realization of a full screen of the electronic equipment.
  • the present application provides an under-screen fingerprint identification device, which is applied to an electronic device with a liquid crystal display screen and a middle frame, and includes a detection light source and a fingerprint identification module.
  • the detection light source is located on the protective cover of the liquid crystal display screen.
  • the middle frame is used to support the liquid crystal display screen, and the middle frame is provided with an accommodation space at a position opposite to the detection light source, and the detection light source is at least partially located in the accommodation space Inside and attached to the middle frame;
  • the fingerprint recognition module is used to be arranged under the liquid crystal display screen, and its fingerprint recognition area is located in the display area of the liquid crystal display screen; wherein, the detection light source is used for It emits detection light for fingerprint recognition to a finger located above the fingerprint recognition area on the liquid crystal display screen, and the fingerprint recognition module is configured to receive the detection light irradiating the finger to form and pass through the The fingerprint detection light returned by the liquid crystal display to obtain the fingerprint information of the finger.
  • the accommodating space is located on the frame of the middle frame.
  • the frame is an arc-shaped frame with a thick middle and thin sides, and the accommodating space is arranged close to the middle of the frame.
  • the liquid crystal display screen includes a display module having the protective cover plate and a liquid crystal panel, the liquid crystal panel is located under the protective cover plate, and the protective cover plate An extension part exposed to the liquid crystal panel is provided on one side, and the detection light source is located under the extension part and arranged side by side with the liquid crystal panel; wherein the extension part forms the edge area.
  • a support portion for supporting the extension portion is provided on the frame, and the extension portion is located on the support portion and is attached to the support portion.
  • the accommodating space is located below the supporting portion, and a gap is left between the detection light source and the inner wall of the accommodating space.
  • the accommodating space is a groove or a recessed structure opened on the frame for accommodating the detection light source.
  • the detection light source is attached to the frame through a first circuit board, and the first circuit board is electrically connected to the detection light source, and is used to control the turning on of the detection light source Or close.
  • the first circuit board is a flexible circuit board.
  • the first circuit board is attached to the frame through a reinforcing plate, and the reinforcing plate is used to support the detection light source, wherein the first circuit board is located at Between the reinforcing plate and the detection light source.
  • the wavelength of the detection light is different from that of the backlight used for displaying images provided by the backlight module of the liquid crystal display screen, wherein the backlight module is located on the liquid crystal display screen. Under the display module.
  • the detection light emitted by the detection light source is infrared light
  • the backlight provided by the backlight module is visible light
  • the light-emitting area of the detection light source is located on the side of the detection light source close to the fingerprint recognition area, so that the detection light in the light-emitting area can emit the
  • the middle frame is used to increase the intensity of the detection light irradiated on the finger.
  • the detection light source includes a light-emitting element for emitting the detection light, and the light-emitting element is located on a side of the detection light source close to the fingerprint recognition area;
  • the light-emitting element is obliquely arranged in the detection light source, so that the detection light in the light-emitting area can emit the middle frame, which is used to increase the amount of light irradiated above the fingerprint recognition area.
  • the intensity of the probe light on the finger is obliquely arranged in the detection light source, so that the detection light in the light-emitting area can emit the middle frame, which is used to increase the amount of light irradiated above the fingerprint recognition area. The intensity of the probe light on the finger.
  • the middle frame and the second circuit board of the liquid crystal display screen are provided with a reflective layer at a position relative to the light-emitting area of the detection light source, wherein the second The circuit board is connected to the liquid crystal panel of the liquid crystal display screen, and the reflective layer is used to cause the detection light in the light-emitting area to emit the protective cover to increase the amount of light irradiated above the fingerprint recognition area. The intensity of the detection light on the finger.
  • the reflective layer is respectively disposed in the containing space and at a position opposite to the light-emitting area, and the side of the second circuit board facing the detection light source.
  • the second circuit board is arranged on the same side of the liquid crystal panel and the backlight module, and is arranged close to the detection light source.
  • the reflective layer is a reflective film used to reflect the probe light, or the reflective layer is formed by spraying a reflective material to reflect the probe light. Coating.
  • the fingerprint identification module is arranged close to the detection light source, wherein the detection light source is located under the protective cover of the non-display area of the liquid crystal display screen, and the fingerprint identification The module is located below the backlight module in the display area of the liquid crystal display screen.
  • the middle frame further includes a support plate located in the middle of the frame, the frame is provided on the peripheral side of the support plate, and between the frame and the support plate A first accommodating cavity and a second accommodating cavity are formed vertically, a part of the liquid crystal display screen is located in the first accommodating cavity, and the main board of the electronic device is located in the second accommodating cavity.
  • the fingerprint identification module is located under the liquid crystal display screen, wherein the support plate is provided with a first opening; the fingerprint identification module and the second An opening is arranged oppositely and is attached to the bottom of the support plate or the backlight module of the liquid crystal display screen, and the first opening is used to transmit the fingerprint detection light passing through the liquid crystal display screen To the fingerprint identification module.
  • the liquid crystal display screen is provided with a light-transmitting area for transmitting the fingerprint detection light to the fingerprint identification module through the backlight module.
  • the liquid crystal display screen includes the backlight module, the backlight module includes an optical module that can transmit the fingerprint detection light, and a steel plate, and the fingerprint recognition module
  • the group is located under the steel plate, and the steel plate is provided with a second opening at a position relative to the fingerprint recognition module. The second opening is used to allow the optical module to pass through the The fingerprint detection light is transmitted to the fingerprint identification module, wherein the second opening is the light-transmitting area.
  • the present application provides an electronic device including a middle frame, a liquid crystal display screen arranged in the middle frame, and the under-screen fingerprint identification device as described in any one of the above.
  • the present application provides an under-screen fingerprint identification device and electronic equipment.
  • the detection light source is located under the edge area of the protective cover of the liquid crystal display screen, and an accommodation space is provided at the relative position of the middle frame and the detection light source, so that at least part of the light source is detected Located in the containing space and attached to the middle frame, it can reduce the increased width of the chin area of the electronic device while realizing the fingerprint recognition function under the screen, which is helpful for the realization of the full screen of the electronic device, thereby solving the existing electronic products
  • the mid-infrared light source is arranged in the chin area of the electronic product through the circuit board, so that the width of the chin area of the electronic product increases in a relatively high proportion, which hinders the problem of the realization of the full screen of the electronic product.
  • FIG. 1 is a schematic diagram of the structure of an existing liquid crystal display screen
  • Fig. 2 is a schematic diagram of an existing structure in which an infrared light source is set in the chin area of a mobile phone;
  • FIG. 3 is a schematic diagram of the existing structure where the infrared light source is arranged at another angle of the chin area of the mobile phone;
  • Fig. 4 is a schematic structural diagram of a widened chin area of a mobile phone in the prior art
  • FIG. 5 is a schematic structural diagram of a mobile phone equipped with an under-screen fingerprint recognition device provided in Embodiment 1 of the present application;
  • FIG. 6 is a schematic diagram of assembling a detection light source and a middle frame according to the second embodiment of the present application.
  • FIG. 7 is a schematic diagram of the assembly of another detection light source and the middle frame provided by the second embodiment of the present application.
  • Fig. 8 is a schematic structural diagram of a mobile phone equipped with an under-screen fingerprint recognition device provided in the third embodiment of the present application.
  • a liquid crystal display (LCD) screen generally adopts a backlight strip (that is, a backlight light source 223) to fill light for the screen display of the LCD screen.
  • a backlight strip that is, a backlight light source 223
  • Unable to control the brightness of a separate area such as fingerprint recognition area 214. Due to the presence of the reflective film in the backlight module of the LCD, the visible light emitted by the backlight belt cannot pass through the reflective film to reach the fingerprint recognition sensor for fingerprint recognition .
  • the infrared light source is set in the chin area of an electronic product such as a mobile phone through a flexible circuit board to perform infrared supplement light, thereby realizing the fingerprint recognition function under the screen.
  • the chin area of the electronic product is below the edge area of the protective cover of the LCD screen, which is often used as an area for LCD wiring.
  • the width of the chin area is increased.
  • the length is L, where L is greater than or equal to 0.7mm.
  • the width of 0.7mm or above has a higher increase in width, making the screen-to-body ratio of electronic devices such as mobile phones The reduction is more obvious and affects the front appearance of the mobile phone, which runs counter to the current development trend of full-screen electronic devices and hinders the realization of full-screen electronic products.
  • the present application provides an under-screen fingerprint identification device and electronic equipment, which can reduce the increased width of the chin area of the electronic equipment, and contribute to the realization of a full screen of the electronic equipment.
  • the embodiments of the present application provide an under-screen fingerprint identification device and electronic equipment, where the electronic equipment may include, but is not limited to, mobile phones, tablet computers, televisions, notebook computers, digital photo frames, navigators, fingerprint locks, etc. that use liquid crystal display screens. Electronic products or components.
  • the electronic equipment includes a middle frame, a liquid crystal display screen arranged in the middle frame, and an under-screen fingerprint identification device provided in the embodiment of the present application.
  • an application scenario of a mobile phone using a liquid crystal display screen is taken as an example to further explain the under-screen fingerprint identification device of the present application.
  • FIG. 5 is a schematic structural diagram of a mobile phone equipped with an under-screen fingerprint recognition device provided in Embodiment 1 of the present application.
  • an embodiment of the present application provides an under-screen fingerprint identification device, which is applied to an electronic device having a liquid crystal display screen 20 and a middle frame 10, and includes a detection light source 31 and a fingerprint identification module 32.
  • the detection light source 31 is located in the liquid crystal Below the edge area of the protective cover plate 211 of the display screen 20, the middle frame 10 is used to support the liquid crystal display screen 20, and the middle frame 10 is provided with an accommodation space 111 at a position opposite to the detection light source 31, and the detection light source 31 is at least partially located in the accommodation In the space 111 and attached to the middle frame 10;
  • the fingerprint recognition module 32 is used to be arranged under the liquid crystal display screen 20, and its fingerprint recognition area 214 is located in the display area 212 of the liquid crystal display screen 20; wherein the detection light source 31 is used for Transmit detection light for fingerprint recognition to the finger located above the fingerprint recognition area 214 on the liquid crystal display screen 20, and the fingerprint recognition module 32 is used for receiving the detection light formed by irradiating the finger and returning through the liquid crystal display
  • the mobile phone 100 may include a liquid crystal display screen 20 and a back cover (not marked in the figure), and the middle frame 10 is installed between the liquid crystal display screen 20 and the back cover. Used to support the LCD screen 20.
  • other components inside the mobile phone 100 such as the main board 50 of the mobile phone 100 and the battery (not marked in the figure), etc. may be provided on the middle frame 10.
  • the connection between the middle frame 10 and the liquid crystal display screen 20 and the back cover can be clipped, bonded or connected by fasteners.
  • the middle frame 10 can refer to the middle frame of the existing mobile phone 100. 10 structure. In this embodiment, the structure of the middle frame 10 will not be further elaborated.
  • the edge area of the protective cover 211 may correspond to the chin area of an electronic device such as a mobile phone 100, which may be used as the wiring area of the liquid crystal panel 212, and the detection light source 31 may be arranged on the protective cover.
  • 211 is below the edge extension 2111, and is arranged side by side with the main body area of the liquid crystal panel 212 (that is, does not overlap each other), and emits detection light for fingerprint recognition to the finger located above the fingerprint recognition area 214 on the liquid crystal display screen 20, Perform fingerprint recognition.
  • the detection light source 31 when the detection light source 31 is attached to the middle frame 10 through a flexible circuit board and a reinforcing plate and is set on the chin area of the mobile phone 100 to fill light to realize the fingerprint recognition function under the screen, it will increase The width of the chin area affects the screen-to-body ratio of the mobile phone 100 and the appearance of the front of the mobile phone 100, resulting in a decrease in the mobile phone 100-screen ratio, which runs counter to the current development trend of full-screen electronic devices and hinders the full-screen display of the mobile phone 100.
  • the realization when the detection light source 31 is attached to the middle frame 10 through a flexible circuit board and a reinforcing plate and is set on the chin area of the mobile phone 100 to fill light to realize the fingerprint recognition function under the screen, it will increase The width of the chin area affects the screen-to-body ratio of the mobile phone 100 and the appearance of the front of the mobile phone 100, resulting in a decrease in the mobile phone 100-screen ratio, which runs counter to the current development trend of
  • the thickness of the part of the arc-shaped frame near the protective cover 211 is about 0.65 mm, and the closer it is to it The greater the thickness of the arc-shaped frame, the maximum thickness (that is, the width) of the middle part is about 1.3 mm.
  • the detection light source 31 is provided under the edge area of the protective cover 211, and the middle frame 10 is provided with a containing space 111 at a position opposite to the detection light source 31, so that Part of the structure of the detection light source 31 is located in the accommodating space 111.
  • the infrared light source is directly arranged in the chin area of the mobile phone 100 for supplementary light (as shown in Figures 2 to 2).
  • the embodiment of the present application can reduce the increased width of the chin area, avoid the significant decrease in the screen-to-body ratio of the mobile phone 100, and contribute to the realization of the full screen of the mobile phone 100.
  • the entire structure of the detection light source 31 may be located in the accommodation space 111, that is, the entire structure of the detection light source 31 is buried in the middle frame Within 10.
  • the detection light i.e. supplementary light
  • the mobile phone may not be added.
  • the width of the chin area 100 that is, keeping the width of the chin area of the mobile phone 100 unchanged, helps to realize the full screen of the mobile phone 100.
  • the increased width of the chin area of the mobile phone 100 depends on the width of the detection light source 31 exposed in the accommodating space 111. Therefore, in practical applications, without affecting the intensity of the middle frame 10 and the light-filling effect on the finger above the fingerprint recognition area 214, the depth of the accommodating space 111 can be increased so that more parts of the detection light source 31 are located In the accommodating space 111, the width of the chin area can be reduced or not increased.
  • the part of the detection light source 31 exposed to the accommodating space 11 may be located on the second circuit board 2121 of the liquid crystal panel 212.
  • the safe space between the bend and the middle frame (approximately 0.8mm in width), to achieve the purpose of not increasing the width of the chin area.
  • the part of the detection light source 31 exposed to the accommodating space 11 may be the light-emitting surface of the detection light source or a part of the external light-emitting surface.
  • the detection light source 31 as an example of an infrared lamp with a thickness (ie width) of 0.3mm on the light-emitting surface
  • the bending part of the second circuit board 2121 of the liquid crystal panel 212 can be used
  • the safety space (about 0.8 mm in width) between the middle frame 10 and the middle frame 10 does not increase the width of the chin area.
  • the detection light source 31 with a smaller (ie thinner) light-emitting surface in the prior art can be selected to reduce or not increase the width of the chin area.
  • the depth of the accommodating space 111 is not further limited.
  • the accommodating space 111 is adapted to the structure of the detection light source 31, which can be a trough opened on the middle frame 10, or the accommodating space 111 can also be a recessed structure on the middle frame 10.
  • the structure of the accommodating space 111 will not be further limited.
  • the screen-to-body ratio is the ratio of the screen area to the entire machine area, that is, the larger the screen, the larger the screen-to-body ratio, which is more beneficial to the user experience.
  • Full screen is a relatively broad definition of the mobile phone 100 industry for the design of the ultra-high screen-to-body ratio mobile phone 100.
  • the full-screen mobile phone 100 can enhance the appearance of the mobile phone 100 and make the mobile phone 100 look more technological.
  • the front area of the fuselage can accommodate a larger screen, which significantly improves the visual experience.
  • the detection light source 31 is located under the edge area of the protective cover plate 211 of the liquid crystal display screen 20, and the accommodating space 111 is provided at the position where the middle frame 10 is opposite to the detection light source 31, so that at least part of the detection light source 31 is located in the accommodating area.
  • the space 111 and attached to the middle frame 10 while realizing the fingerprint recognition function under the screen, it can reduce the increased width of the chin area of the mobile phone 100, which is helpful for the realization of the full screen of electronic equipment, thereby solving the existing electronic products.
  • the mid-infrared light source is arranged in the chin area of the electronic product through the circuit board, so that the width of the chin area of the electronic product increases in a relatively high proportion, which hinders the problem of the realization of the full screen of the electronic product.
  • the fingerprint recognition area 214 is located in the display area 212 of the liquid crystal display screen 20.
  • the display area 212 of the liquid crystal display screen 20 is an area on the liquid crystal display screen 20 or the mobile phone 100 for displaying images.
  • the fingerprint recognition area 214 may specifically be an area for the user to press a finger to implement a fingerprint input operation.
  • the detection light source 31 is located under the non-display area 213 of the liquid crystal display screen 20, wherein the non-display area 213 is located in the display The periphery of the area 212; the fingerprint identification module 32 is located under the light-transmitting area of the liquid crystal display screen 20, so that the fingerprint detection light carrying fingerprint information can be transmitted to the fingerprint identification module 32 through the light-transmitting area.
  • non-display area 213 on the liquid crystal display screen 20 is an area on the liquid crystal display screen 20 that is not displayed or has no display function.
  • the accommodating space 111 is located on the frame 11 of the middle frame 10, so that the detection light source 31 is located under the edge area of the protective cover 211, and the chin area of the mobile phone 100 emits detection light to the finger located above the fingerprint recognition area 214 .
  • the frame 11 may be an arc-shaped frame with a thick middle and thin sides, because the part of the frame 11 close to the protective cover 211 is thicker.
  • the accommodating space 111 cannot be opened. Therefore, the accommodating space 111 is arranged close to the middle of the frame 11 so that the accommodating space 111 can be opened on the frame 11 so that at least part of the detection light source 31 is located in the accommodating space 111.
  • the infrared light source is directly arranged in the chin area of the mobile phone 100 to fill light, which can reduce the increased width of the chin area.
  • the accommodating space 111 may be located at an end of the frame 11 close to the protective cover 211 (ie, the end of the frame 11).
  • the embodiment of the present application takes the above-mentioned arc-shaped frame as an example to further explain the under-screen fingerprint identification device of the present application.
  • the liquid crystal display screen 20 includes a display module 21 having a protective cover 211 and a liquid crystal panel 212.
  • the liquid crystal panel 212 is located under the protective cover 211, and one side of the protective cover 211 is provided with exposed liquid crystals.
  • the detection light source 31 is located under the extension 2111 and is arranged side by side with the liquid crystal panel 212, so that the detection light emitted by the detection light source 31 can better penetrate the liquid crystal display screen 20, so as to reduce the detection light in the optical path. Loss in transmission improves light utilization; among them, the extension 2111 forms an edge area.
  • the frame 11 is provided with a support portion 112 for supporting the extension portion 2111.
  • the extension portion 2111 is located on the support portion 112 and is attached to the support portion 112. , So as to realize the support of the liquid crystal display screen 20.
  • the way of attaching the extension portion 2111 to the support portion 112 includes but is not limited to bonding.
  • the supporting portion 112 and the frame 11 may be an integral structure, or the supporting portion 112 and the frame 11 may be a separate structure.
  • the supporting portion 112 and the frame 11 in this embodiment are formed as an integral structure.
  • the accommodating space 111 is located below the supporting portion 112, so that the detection light source 31 is located under the extension 2111, and there is a gap between the detection light source 31 and the inner wall of the accommodating space 111 to reduce detection
  • the detection light emitted by the light source 31 may be blocked by the middle frame 10, and at the same time, the installation and disassembly of the detection light source 31 can be facilitated.
  • the accommodating space 111 may be a groove or a recessed structure opened on the frame 11 for accommodating the detection light source 31, and the structural size of the groove or the recessed structure needs to be larger than the structural size of the detection light source 31 to facilitate the detection of the light source 31 Installation and removal.
  • the detection light source 31 is attached to the frame 11 through the first circuit board 311, and the first circuit board 311 is electrically connected to the detection light source 31 for controlling the turning on of the detection light source 31 Or closed, wherein the part of the first circuit board 311 used to fix the detection light source 31 is located in the accommodating space 111.
  • the method for attaching the first circuit board 311 to the frame 11 includes but is not limited to bonding.
  • the first circuit board 311 may be attached to the frame 11 through the adhesive layer 60.
  • the first circuit board 311 may be a flexible circuit board, which is convenient for bending the first circuit board 311 to realize the first circuit board.
  • a circuit board 311 is connected to the main board 50 of the mobile phone 100.
  • the first circuit board 311 may pass through the middle frame 10 and be directly connected to the main board 50 of the mobile phone 100, or the first circuit board 311 may be connected to the main board 50 of the mobile phone 100 through the second circuit board 2121 through the main board 50. Power is supplied to the detection light source 31, thereby realizing the function of the detection light source 31.
  • connection manner of the first circuit board 311 and the main board 50 or the second circuit board 2121 includes but is not limited to welding.
  • the second circuit board 2121 is a circuit board connected to the liquid crystal panel of the liquid crystal display screen.
  • the connection manner of the first circuit board 311 and the main board 50 of the mobile phone 100 is not further limited.
  • the first circuit board 311 can also be bonded to the frame 11 through a reinforcing plate (not marked in the figure), which is used to support the detection light source 31
  • the first circuit board 311 may be located between the reinforcing plate and the detection light source 31, and the reinforcing plate is attached to the frame 11 to enhance the bonding strength between the detection light source 31 and the middle frame 10.
  • the way of attaching the reinforcing plate to the frame 11 includes, but is not limited to, bonding.
  • the detection light is different from the wavelength of the backlight provided by the backlight module 22 of the liquid crystal display screen 20 for displaying images.
  • the waveband of the detection light or fingerprint detection light is different from the backlight waveband.
  • the backlight module 22 is located under the display module 21 of the liquid crystal display screen 20. Therefore, the detection light emitted by the detection light source 31 of the embodiment of the present application can not only realize fingerprint recognition under the screen, but also reduce the interference of the detection light on the display effect of the liquid crystal display screen 20, so as to avoid affecting the display effect of the image.
  • the detection light emitted by the detection light source 31 may be infrared light, or other light signals with a wavelength outside the visible light band and capable of fingerprint recognition. That is, in this embodiment, the detection light includes but is not limited to Infrared light; the backlight provided by the backlight module 22 is visible light, so that the user cannot see or perceive the detection light used for fingerprint recognition through the liquid crystal display screen 20. Since the penetration ability of infrared light is stronger than that of visible light, it can more effectively enhance the signal of the fingerprint detection light penetrating the liquid crystal display screen 20 and the backlight module 22, thereby improving the fingerprint recognition effect. Therefore, in this embodiment, the detection light is preferably Infrared light, such as infrared light with a wavelength of 940nm.
  • the fingerprint identification module 32 is arranged close to the detection light source 31, wherein the detection light source 31 is located under the protective cover 211 of the non-display area 213 of the liquid crystal display screen 20, and the fingerprint identification module 32 is located on the liquid crystal display
  • the display area 212 of the screen 20 is below the backlight module 22.
  • the fingerprint identification module 32 can refer to the structure of the fingerprint identification module 32 in the prior art. In the prior art, the structure of the fingerprint identification module 32 will not be further described.
  • the middle frame 10 further includes a supporting plate 12 located in the middle of the frame 11.
  • the frame 11 is provided on the peripheral side of the supporting plate 12, and a vertical line is formed between the frame 11 and the supporting plate 12.
  • the first accommodating cavity and the second accommodating cavity are arranged directly, part of the liquid crystal display screen 20 is located in the first accommodating cavity, the main board 50 of the electronic device is located in the second accommodating cavity, and the liquid crystal display screen 20 and the electronic device such as The main board 50 of the mobile phone 100 is isolated.
  • the middle frame 10 composed of the support plate 12 and the frame 11 may be an integrated molding structure, or may be a split structure. Wherein, when the support plate 12 and the frame 11 are in a split structure, the connection method of the support plate 12 and the frame 11 includes but is not limited to bonding or clamping.
  • the fingerprint identification module 32 may be located under the liquid crystal display screen 20, wherein the support plate 12 is provided with a first opening 121, the fingerprint identification module 32 and the first The opening 121 is arranged oppositely and is attached to the support plate 12. The first opening 121 is used to transmit the fingerprint detection light passing through the liquid crystal display screen 20 to the fingerprint identification module 32.
  • the fingerprint recognition module 32 may be integrally attached to the lower surface of the support plate 12 of the middle frame 10 and located under the first opening 121, or at least part of the fingerprint recognition module 32 may be located The first opening is at 121.
  • the arrangement of the fingerprint identification module 32 is not further limited, as long as it is satisfied that the fingerprint detection light can enter the fingerprint identification module 32 through the first opening 121.
  • the shape and size of the first opening 121 can satisfy that the fingerprint detection light can basically pass through, so as to avoid affecting the fingerprint image acquisition because the fingerprint detection light cannot normally pass through the middle frame 10.
  • the size of the first opening 121 is based on the receiving light path of the fingerprint identification module 32.
  • the fingerprint identification module 32 can also be attached to the bottom of the backlight module 22 of the liquid crystal display screen 20, and the fingerprint identification module 32 is provided on the support plate 12 through the first opening 121 .
  • the bonding method of the fingerprint identification module 32 and the backlight module 22 includes but is not limited to bonding.
  • the liquid crystal display screen 20 is provided with a light-transmitting area for transmitting the fingerprint detection light through the backlight module 22 to the fingerprint identification module 32.
  • the relative positions of the detection light source 31, the light transmission area, and the fingerprint identification module 32 can be adjusted as needed, but the adjusted detection light source 31, the light transmission area, and the fingerprint
  • the relative position between the recognition modules 32 needs to be such that the detection light emitted by the detection light source 31 can illuminate the finger above the fingerprint recognition area 214, and the fingerprint detection light formed by the reflection or transmission of the finger can pass through the backlight module 22.
  • the light area enters the fingerprint recognition module 32.
  • the liquid crystal display screen 20 includes a backlight module 22.
  • the backlight module 22 includes an optical module 221 that can transmit fingerprint detection light, and a steel plate 222.
  • the fingerprint recognition module 32 is located under the steel plate 222, and the steel plate 222 is in contact with each other.
  • the fingerprint identification module 32 is provided with a second opening 2221 at a relative position.
  • the second opening 2221 is used to transmit the fingerprint detection light passing through the optical module 221 to the fingerprint identification module 32.
  • the second opening 2221 It is the light-transmitting area.
  • the shape and size of the second opening 2221 can satisfy that the fingerprint detection light can basically pass through, so as to avoid that the fingerprint detection light cannot normally pass through the backlight module 22 in the liquid crystal display screen 20 and affect the acquisition of fingerprint images.
  • the size of the second opening 2221 is based on the receiving light path of the fingerprint identification module 32.
  • the backlight module 22 is arranged under the liquid crystal panel 212 to provide a backlight source for the liquid crystal panel 212; the backlight module 22 includes a backlight light source 223, and the visible light emitted by the backlight light source is converted into a uniform ground light source through the optical module 221 and irradiated
  • the liquid crystal panel 212 causes it to display a screen.
  • the optical mold 221 may include a reflective film, a light guide plate, a brightness enhancement film, etc.
  • the optical mold 221 may refer to optical molds in the prior art that can at least partly allow fingerprint detection light to pass through. 221. In this embodiment, it will not be further described.
  • the detection light source is located under the edge area of the protective cover of the liquid crystal display screen, and an accommodating space is provided at the position of the middle frame relative to the detection light source, so that at least part of the detection light source is located in the accommodating space Inner and fit with the middle frame, so that while realizing the fingerprint recognition function under the screen, it can reduce the increased width of the chin area of the mobile phone, which is helpful for the realization of the full screen of the electronic device.
  • FIG. 6 is a schematic diagram of assembling a detection light source and a middle frame provided in the second embodiment of the present application
  • FIG. 7 is a schematic diagram of assembling another detection light source and a middle frame provided in the second embodiment of the present application.
  • the detection light source 31 is at least partially embedded in the middle frame 10, in order to prevent the detection light in the light-emitting area of the detection light source 31 from being blocked by the middle frame 10, the detection light source The light-emitting area of 31 is located on the side of the detection light source 31 close to the fingerprint recognition area 214, so that the detection light in the light-emitting area can emit the middle frame 10, which is used to increase the intensity of the detection light irradiated on the finger.
  • the detection light source 31 includes a light-emitting element 312 for emitting detection light.
  • the light-emitting element 312 may be located in the detection area.
  • the light source 31 is close to the side of the fingerprint recognition area 214, and/or the light-emitting element 312 can be arranged obliquely in the detection light source 31, so that the detection light in the light-emitting area can emit the middle frame 10, which is used to increase the exposure to the fingerprint recognition The intensity of the probe light on the finger above the area 214.
  • the light-emitting element 312 may be located on the side of the detection light source 31 close to the fingerprint recognition area 214, or the light-emitting element 312 may be installed in the detection light source 31 obliquely, or the light-emitting element 312 may be located on the detection light source 31.
  • the detection light in the light-emitting area of the detection light source 31 can emit the middle frame 10, which is used to increase the amount of light irradiated on the finger above the fingerprint recognition area 214.
  • the intensity of the probe light is not further limited.
  • the inclination angle of the light-emitting element 312 in the detection light source 31 and the arrangement of the detection light source 31 in the accommodation space 111 that is, part of the structure of the detection light source 31 is located in the accommodation space 111 or the detection light source
  • the overall structure of 31 is located in the accommodating space 111) and the light-emitting area of the detection light source 31 (that is, the illumination angle of the detection light source 31) is related. Therefore, in this embodiment, the inclination angle of the light-emitting element 312 can be adjusted according to the manner in which the detection light source 31 is arranged in the accommodating space 111 and the light-emitting area of the detection light source 31.
  • the light-emitting element 312 can be installed in the detection light source 31 obliquely. In order to enable the detection light in the light-emitting area to be emitted from the middle frame 10, it is sufficient to increase the intensity of the detection light irradiated on the finger above the fingerprint recognition area 214. In this embodiment, the inclination angle of the light emitting element 312 in the detection light source 31 is not further limited.
  • an optical element may also be provided in the detection light source 31 (Not marked in the figure), the light-emitting angle of the detection light source 31 is changed by optical elements, so that the detection light in the light-emitting area can be emitted from the middle frame 10, which is used to increase the intensity of the detection light irradiated on the finger.
  • the optical element includes but is not limited to a lens.
  • the detection light source 31 may be an infrared light source, and the detection light emitted by it is infrared light. Therefore, the fingerprint detection light formed by the detection light irradiating the finger and being reflected or transmitted by the finger is also infrared light.
  • the detection light source 31 may be an infrared light source such as an infrared lamp, an infrared vertical cavity surface emitting laser (VCSEL), an infrared laser diode (Laser Diode), etc., in this embodiment, for the detection
  • VCSEL infrared vertical cavity surface emitting laser
  • Laser Diode infrared laser diode
  • the type of light source 31 is not further limited. It should be noted that, in this embodiment, the light-emitting element 312 is packaged to form the detection light source 31.
  • the light-emitting element 312 is a light-emitting element (such as a light-emitting chip) in the detection light source 31 described above, and the light-emitting element 312 can refer to the existing light-emitting element in the detection light source 31 described above. In this embodiment, the light-emitting element 312 will not be further described.
  • the detection light source is located under the edge area of the protective cover of the liquid crystal display screen, so that at least part of the detection light source is located in the containing space and is attached to the middle frame.
  • the light-emitting area of the detection light source is located on the side of the detection light source close to the fingerprint recognition area, so that the detection light in the light-emitting area can emit the middle frame, so as to reduce the increased width of the chin area of the mobile phone, and improve the effect of fingerprint recognition under the screen , Contribute to the realization of the full screen of electronic equipment.
  • Fig. 8 is a schematic structural diagram of a mobile phone equipped with an under-screen fingerprint recognition device provided in the third embodiment of the present application.
  • the thickness of the part of the arc-shaped frame close to the protective cover 211 is only 0.6 mm.
  • the accommodating space 111 cannot be opened, and the thickness of the middle part of the frame is about 1.3 mm. Therefore, the accommodating space 111 needs to be opened close to the middle of the frame 11. Since the accommodating space 111 is close to the middle of the frame 11 of the middle frame 10, compared with the prior art, the detection light source 31 is directly arranged in the chin area of the mobile phone 100 (as shown in FIG. 3), so that the detection light source 31 is far away from the liquid crystal display screen 20. The protective cover 211 is far away, and part of the light-emitting area of the detection light source 31 may be blocked, resulting in a low light utilization rate of the detection light source 31.
  • the middle frame 10 and the second circuit board 2121 of the liquid crystal display screen 20 are provided with a reflective layer 40 at a position opposite to the light-emitting area of the detection light source 31, and the reflective layer 40 Reflect the detection light irradiated on the middle frame 10 and/or the second circuit board 2121 for fingerprint identification, so as to avoid the detection light being blocked by the middle frame 10 or the second circuit board 2121 and make the light in the light-emitting area
  • the detection light is emitted from the protective cover 211, thereby increasing the light utilization rate of the detection light source 31, and thereby increasing the intensity of the detection light irradiated on the finger above the fingerprint recognition area 214.
  • the second circuit board 2121 is connected to the liquid crystal panel 212 of the liquid crystal display screen 20.
  • the reflective layer 40 may be respectively disposed on the frame 11 and at a position opposite to the light-emitting area, and the side of the second circuit board 2121 facing the detection light source 31, for illuminating the light source 31
  • the detection light on the second circuit board 2121 is reflected.
  • the reflective layer 40 may be disposed at a position opposite to the light-emitting area in the accommodating space 111, and extend to the outside of the accommodating space 111 and cover the supporting portion 112, in order to be protected by the second circuit board.
  • the detection light blocked by 2121 passes through the protective cover 211 and irradiates the finger above the fingerprint recognition area 214.
  • the blocked detection light needs to be reflected twice.
  • the second circuit board 2121 is arranged on the same side of the liquid crystal panel 212 of the liquid crystal display screen 20 and the backlight module 22, and is arranged close to the detection light source 31;
  • the board 2121 is located on the support board 12.
  • the second circuit board 2121 may be a flexible circuit board.
  • the second circuit board 2121 can be bent and arranged on the same side of the liquid crystal panel 212 of the liquid crystal display screen 20 and the backlight module 22, and the connection with the main board 50 of the mobile phone 100 can be realized.
  • the connection between the second circuit board 2121 and the main board 50 includes but is not limited to welding.
  • the reflective layer 40 may be a reflective film material used to reflect the probe light in the prior art, or the reflective layer 40 may be a coating formed by spraying a reflective material for reflecting the probe light.
  • the reflective material includes but is not limited to silver or aluminum.
  • the reflective film material can refer to the film material in the prior art that can have a higher reflectivity for the detection light used for fingerprint recognition, where higher reflectivity means that the reflectivity is greater than or equal to 90%. In this embodiment, No further details on its structure.
  • the detection light source 31 when the detection light source 31 is all located in the accommodating space 111 on the frame 11, in order to prevent the detection light emitted by the detection light source 31 from being blocked by the middle frame 10 or the second circuit board 2121, the light-emitting area of the detection light source 31 may be located at The detection light source 31 is close to the fingerprint recognition area 214, and the middle frame 10 and the second circuit board 2121 are provided with a reflective layer 40 at a position relative to the light-emitting area of the detection light source 31 to change the light-emitting angle of the detection light source 31. In this way, the detection light emitted by the detection light source 31 can exit the protective cover 211 and irradiate the finger above the fingerprint recognition area 214 for fingerprint recognition.
  • the detection light source is located under the edge area of the protective cover of the liquid crystal display screen, so that at least part of the detection light source is located in the containing space and is attached to the middle frame.
  • the setting of the reflective layer on the second circuit board of the LCD screen and the LCD screen can improve the light utilization rate of the detection light source, thereby reducing the width of the mobile phone’s chin area and improving the effect of fingerprint recognition under the screen, which is helpful The realization of the full screen of electronic equipment.
  • connection should be understood in a broad sense.
  • it can be a fixed connection or an intermediate connection.
  • the medium is indirectly connected, which can be the internal communication between two elements or the interaction between two elements.

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Abstract

本申请提供一种屏下指纹识别装置及电子设备，屏下指纹识别装置，应用于具有液晶显示屏幕和中框的电子设备，包括检测光源和指纹识别模组，检测光源位于液晶显示屏幕的保护盖板的边缘区域之下，且中框在与检测光源相对位置处设有容纳空间，检测光源至少部分位于容纳空间内且与中框贴合，以缩小电子设备的下巴区域的增加宽度，有助于电子设备的全面屏的实现。

Description

屏下指纹识别装置及电子设备 技术领域
本申请涉及显示技术领域，尤其涉及一种屏下指纹识别装置及电子设备。
背景技术
智能手机进入全面屏时代，手机的屏占比越来越大，屏下指纹识别技术顺势成为潮流。有机发光二极管(OrganicLight-Emitting Diode，简称OLED)可以控制单独像素点的亮灭，采用OLED屏幕手机的光学屏下指纹识别技术已经进入商用时代。
与OLED不同的是，液晶显示器(Liquid Crystal Display，LCD)屏幕一般采用背光灯带进行补光以用于LCD屏幕的画面显示，不能控制单独区域的亮灭，由于液晶显示器中的背光模组中反射膜的存在，使得背光灯带发出的可见光无法透过该反射膜到达指纹识别传感器，进行指纹识别，所以，采用LCD屏幕的手机需要使用红外光源补光，从而实现屏下指纹识别功能。目前，现有技术中，红外光源通过柔性电路板设在电子产品如手机的下巴区域，进行红外补光，从而实现屏下指纹识别功能。手机的下巴区域为LCD屏幕的保护盖板边缘区域下方，常作为液晶走线的区域。
然而，由于红外光源通过柔性电路板和补强板设在电子产品的下巴区域，使得下巴区域会增加一定的宽度，相较于现有电子产品的下巴区域，其下巴区域宽度增加比例较高，使得手机的屏占比降低较为明显，阻碍了电子产品的全面屏的实现。
发明内容
本申请提供一种屏下指纹识别装置及电子设备，能够缩小电子设备下巴区域的增加宽度，有助于电子设备的全面屏的实现。
第一方面，本申请提供一种屏下指纹识别装置，应用于具有液晶显示屏幕和中框的电子设备，包括检测光源和指纹识别模组，所述检测光源位于所述液晶显示屏幕的保护盖板的边缘区域之下，所述中框用于支撑所述 液晶显示屏幕，且所述中框在与所述检测光源相对位置处设有容纳空间，所述检测光源至少部分位于所述容纳空间内且与所述中框贴合；所述指纹识别模组用于设置在所述液晶显示屏幕的下方，且其指纹识别区域位于所述液晶显示屏幕的显示区域；其中，所述检测光源用于向位于所述液晶显示屏幕上的指纹识别区域上方的手指发射用于指纹识别的探测光，所述指纹识别模组用于接收所述探测光照射到所述手指而形成且穿过所述液晶显示屏返回的指纹检测光，以获取所述手指的指纹信息。
在本申请的一种具体实施例中，所述容纳空间位于所述中框的边框上。
在本申请的一种具体实施例中，所述边框为中间厚两边薄的弧形边框，所述容纳空间靠近所述边框的中部设置。
在本申请的一种具体实施例中，所述液晶显示屏幕包括具有所述保护盖板和液晶面板的显示模组，所述液晶面板位于所述保护盖板之下，且所述保护盖板的一侧设有外露于所述液晶面板的延伸部，所述检测光源位于所述延伸部之下并与所述液晶面板并排设置；其中，所述延伸部形成了所述边缘区域。
在本申请的一种具体实施例中，所述边框上设有用于支撑所述延伸部的支撑部，所述延伸部位于所述支撑部上且与所述支撑部贴合。
在本申请的一种具体实施例中，所述容纳空间位于所述支撑部的下方，且所述检测光源与所述容纳空间的内壁之间留有间隙。
在本申请的一种具体实施例中，所述容纳空间为开设在所述边框上的用于容纳所述检测光源的槽体或者凹陷结构。
在本申请的一种具体实施例中，所述检测光源通过第一电路板与所述边框贴合，所述第一电路板与所述检测光源电连接，用于控制所述检测光源的开启或者关闭。
在本申请的一种具体实施例中，所述第一电路板为柔性电路板。
在本申请的一种具体实施例中，所述第一电路板通过补强板与所述边框贴合，所述补强板用于支撑所述检测光源，其中，所述第一电路板位于所述补强板和所述检测光源之间。
在本申请的一种具体实施例中，所述探测光与所述液晶显示屏幕的背光模组提供的用于显示画面的背光的波长不同，其中，所述背光模组位于所述 液晶显示屏幕的显示模组之下。
在本申请的一种具体实施例中，所述检测光源发出的探测光为红外光，所述背光模组提供的背光为可见光。
在本申请的一种具体实施例中，所述检测光源的发光区域位于所述检测光源靠近所述指纹识别区域的一侧，以使所述发光区域内的所述探测光能够发射出所述中框，用于增大照射到所述手指上的所述探测光的强度。
在本申请的一种具体实施例中，所述检测光源包括用于发射所述探测光的发光元件，所述发光元件位于所述检测光源靠近所述指纹识别区域的一侧；
和/或，所述发光元件倾斜设置在所述检测光源内，以使发光区域内的所述探测光能够发射出所述中框，用于增大照射到所述指纹识别区域上方的所述手指上的所述探测光的强度。
在本申请的一种具体实施例中，所述中框和所述液晶显示屏幕的第二电路板在与所述检测光源的发光区域的相对位置处设有反射层，其中，所述第二电路板与所述液晶显示屏幕的液晶面板连接，所述反射层用于使所述发光区域内的所述探测光发射出所述保护盖板，以增大照射到所述指纹识别区域上方的所述手指上的所述探测光的强度。
在本申请的一种具体实施例中，所述反射层分别设在所述容纳空间内且与所述发光区域相对位置处、以及所述第二电路板朝向所述检测光源的一面。
在本申请的一种具体实施例中，所述第二电路板设在所述液晶面板和背光模组的同一侧，且靠近所述检测光源设置。
在本申请的一种具体实施例中，所述反射层为用于对所述探测光进行反射的反射膜材，或者，所述反射层为采用反射材料喷涂形成的用于反射所述探测光的涂层。
在本申请的一种具体实施例中，所述指纹识别模组靠近所述检测光源设置，其中所述检测光源位于所述液晶显示屏幕的非显示区域的保护盖板下方，而所述指纹识别模组位于所述液晶显示屏幕显示区域的背光模组下方。
在本申请的一种具体实施例中，所述中框还包括位于所述边框中部的 支撑板，所述边框设在所述支撑板的周侧，且所述边框与所述支撑板之间形成竖直设置的第一容纳腔和第二容纳腔，部分所述液晶显示屏幕位于所述第一容纳腔内，所述电子设备的主板位于所述第二容纳腔内。
在本申请的一种具体实施例中，所述指纹识别模组位于所述液晶显示屏幕之下，其中，所述支撑板上设有第一开孔；所述指纹识别模组与所述第一开孔相对设置，且与所述支撑板或者所述液晶显示屏幕的背光模组的底部贴合，所述第一开孔用于使透过所述液晶显示屏幕的所述指纹检测光传输至所述指纹识别模组。
在本申请的一种具体实施例中，所述液晶显示屏幕上设有用于使所述指纹检测光透过背光模组传输至所述指纹识别模组的透光区域。
在本申请的一种具体实施例中，所述液晶显示屏幕包括所述背光模组，所述背光模组包括可透过所述指纹检测光的光学模片、以及钢板，所述指纹识别模组位于所述钢板之下，且所述钢板在与所述指纹识别模组的相对位置处设有第二开孔，所述第二开孔用于使透过所述光学模片的所述指纹检测光传输至所述指纹识别模组，其中，第二开孔为所述透光区域。
第二方面，本申请提供一种电子设备，包括中框、设在所述中框内的液晶显示屏幕、以及如上任意一项所述的屏下指纹识别装置。
本申请提供一种屏下指纹识别装置及电子设备，将检测光源位于液晶显示屏幕的保护盖板的边缘区域之下，通过在中框与检测光源相对位置处设置容纳空间，使得至少部分检测光源位于容纳空间内且与中框贴合，从而在实现屏下指纹识别功能的同时，能够缩小电子设备下巴区域的增加宽度，有助于电子设备的全面屏的实现，进而解决了现有电子产品中红外光源通过电路板设在电子产品的下巴区域，使得电子产品下巴区域的宽度增加比例较高，阻碍了电子产品的全面屏的实现的问题。
附图说明
为了更清楚地说明本申请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申请的一些实施例，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为现有的液晶显示屏幕的结构示意图；
图2为现有的将红外光源设置手机下巴区域的结构示意图；
图3是现有将红外光源设置在手机下巴区域的另一角度的结构示意图；
图4是现有技术中手机下巴区域加宽的结构示意图；
图5是本申请实施例一提供的一种装配有屏下指纹识别装置的手机的结构示意图；
图6是本申请实施例二提供的一种检测光源与中框的装配示意图；
图7是本申请实施例二提供的另一种检测光源与中框的装配示意图；
图8是本申请实施例三提供的一种装配有屏下指纹识别装置的手机的结构示意图。
附图标记说明：
手机-100；中框-10；边框-11；容纳空间-111；支撑部-112；支撑板-12；第一开孔-121；液晶显示屏幕-20；显示模组-21；保护盖板-211；延伸部-2111；显示区域-212；非显示区域-213；指纹识别区域-214；液晶面板-212；第二电路板-2121；背光模组-22；光学模片-221；钢板-222；第二开孔-2221；背光光源-223；屏下指纹识别装置-30；检测光源-31；第一电路板-311；发光元件-312；指纹识别模组-32；反射层-40；主板-50；粘结层-60。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
下面以具体地实施例对本申请的技术方案进行详细说明。下面这几个具体的实施例可以相互结合，对于相同或相似的概念或过程可能在某些实施例不再赘述。
智能手机进入全面屏时代，智能手机的屏占比越来越大，屏下指纹识别技术顺势成为潮流。目前，参考图1和图2所示，如背景技术中描述的液晶显示器(Liquid Crystal Display，LCD)屏幕一般采用背光灯带(即背 光光源223)进行补光以用于LCD屏幕的画面显示，不能控制单独区域(如指纹识别区域214)的亮灭，由于液晶显示器中的背光模组中反射膜的存在，使得背光灯带发出的可见光无法透过该反射膜到达指纹识别传感器，进行指纹识别。目前采用LCD屏幕的手机需要使用红外光源补光，从而实现屏下指纹识别功能。现有技术中，参考图2至图4所示，红外光源通过柔性电路板设在电子产品如手机的下巴区域，进行红外补光，从而实现屏下指纹识别功能。电子产品的下巴区域为LCD屏幕的保护盖板边缘区域下方，常作为液晶走线的区域。
然而，参考图4示，由于红外光源通过柔性电路板(即第一电路板311)和补强板设在电子产品的下巴区域并与电子设备的中框贴合，使得下巴区域的宽度增加的长度为L，其中，L大于等于0.7mm，其相较于现有采用LCD屏幕的电子产品4mm的下巴区域，0.7mm或者0.7mm以上宽度增加比例较高，使得电子设备如手机的屏占比降低较为明显而且影响手机的正面外观，与现有电子设备全面屏的发展趋势相违背，阻碍了电子产品的全面屏的实现。
为此，本申请提供一种屏下指纹识别装置及电子设备，能够缩小电子设备下巴区域的增加宽度，有助于电子设备的全面屏的实现。
本申请实施例提供一种屏下指纹识别装置及电子设备，其中，电子设备可以包括但不限于采用液晶显示屏幕的手机、平板电脑、电视机、笔记本电脑、数码相框、导航仪、指纹锁等电子产品或部件。电子设备包括中框、设在中框内的液晶显示屏幕、以及本申请实施例提供的屏下指纹识别装置。
下面本申请实施例以采用液晶显示屏幕的手机的应用场景为例，对本申请的屏下指纹识别装置做进一步阐述。
实施例一
图5是本申请实施例一提供的一种装配有屏下指纹识别装置的手机的结构示意图。
参考图5所示，本申请实施例提供一种屏下指纹识别装置，应用于具有液晶显示屏幕20和中框10的电子设备，包括检测光源31和指纹识别模 组32，检测光源31位于液晶显示屏幕20的保护盖板211的边缘区域之下，中框10用于支撑液晶显示屏幕20，且中框10在与检测光源31相对位置处设有容纳空间111，检测光源31至少部分位于容纳空间111内且与中框10贴合；指纹识别模组32用于设置在液晶显示屏幕20的下方，且其指纹识别区域214位于液晶显示屏幕20的显示区域212；其中，检测光源31用于向位于液晶显示屏幕20上的指纹识别区域214上方的手指发射用于指纹识别的探测光，指纹识别模组32用于接收探测光照射到手指而形成且穿过液晶显示屏20返回的指纹检测光，以获取手指的指纹信息。
需要说明的是，本实施例中，参考图5所示，手机100可以包括液晶显示屏幕20和后盖(在图中未标示)，中框10安装在液晶显示屏幕20和后盖之间，用于支撑液晶显示屏幕20。具体的，手机100内部的其他部件，如手机100的主板50和电池(在图中未标示)等可以设在中框10上。具体的，中框10与液晶显示屏幕20和后盖的连接方式可以为卡接、粘结或者通过紧固件连接，在本实施例中，中框10可以参考现有手机100中的中框10结构，在本实施例中，对于中框10的结构不再做进一步阐述。
其中，参考图5所示，保护盖板211的边缘区域可以对应于电子设备如手机100的下巴区域，其可以用于作为液晶面板212的走线区域，且检测光源31可以设置在保护盖板211的边缘延伸部2111的下方，并与液晶面板212的主体区域并排设置(即不相互重叠)，向位于液晶显示屏幕20上的指纹识别区域214上方的手指发射用于指纹识别的探测光，进行指纹识别。
具体的，正如背景技术中的描述，当检测光源31通过柔性电路板和补强板与中框10贴合设在手机100的下巴区域进行补光，以实现屏下指纹识别功能时，会增加下巴区域的宽度，从而影响手机100的屏占比和手机100正面的外观度，导致手机100屏占比的降低，与现有电子设备全面屏的发展趋势相违背，阻碍了手机100的全面屏的实现。
鉴于手机100的中框10存在一定的厚度，如手机100的中框10采用中间厚两边薄的弧形边框时，弧形边框靠近保护盖板211的部分的厚度约为0.65mm，越靠近其中部，弧形边框的厚度越大，其中部的最大厚度(即宽度)约为1.3mm。为此，本实施例中，参考图5所示，将检测光源31设在保护盖板211的边缘区域之下，且中框10在与检测光源31相对位置 处设有容纳空间111，以使检测光源31的部分结构位于容纳空间111内。因此，在实现对指纹识别区域214上方的手指发射探测光(即补光)的同时，相较于现有技术将红外光源直接设置在手机100下巴区域进行补光的方式(如图2至图4所示)，本申请实施例可以减小下巴区域的增加的宽度，避免手机100的屏占比降低较为明显，有助于手机100的全面屏的实现。
或者，在满足检测光源31发射的探测光可以照射到指纹识别区域214方式的手指时，检测光源31的全部结构可以位于容纳空间111内，也就是说，检测光源31的全部结构埋设在中框10内。此时，在实现对指纹识别区域214上方的手指发射探测光(即补光)的同时，相较于现有技术将红外光源直接设置在手机100下巴区域进行补光的方式，可以不增加手机100下巴区域的宽度，即维持手机100下巴区域的宽度不变，有助于手机100的全面屏的实现。
需要说明的是，当检测光源31的部分结构位于容纳空间111内时，手机100下巴区域的增加宽度取决于外露于容纳空间111的检测光源31的宽度。因此，在实际应用中，在不影响中框10强度以及对指纹识别区域214上方的手指的补光效果的前提下，可以增大容纳空间111的深度，以使检测光源31的更多部分位于容纳空间111内，以缩小或者不增加下巴区域的宽度。
为了达到不增加下巴区域的宽度，本实施例中，当检测光源31的部分结构位于容纳空间111内时，检测光源31外露于容纳空间11的部分可以位于液晶面板212的第二电路板2121的弯折处与中框之间的安全空间(约0.8mm左右的宽度)，达到不增加下巴区域宽度的目的。具体的，当检测光源31的部分结构位于容纳空间111内时，检测光源31外露于容纳空间11的部分可以为检测光源的发光面或者部分外发光面。以检测光源31为发光面的厚度(即宽度)为0.3mm的红外灯例，当红外灯外露于容纳空间111的宽度为0.2mm时，可以利用液晶面板212的第二电路板2121的弯折处与中框10之间的安全空间(约0.8mm左右的宽度)达到不增加下巴区域宽度的目的。
或者，作为一种可实现的方式，可以选取现有技术中发光面厚度较小 (即较薄)的检测光源31来缩小或者不增加下巴区域的宽度。在本实施例中，对于容纳空间111的深度并不做进一步限定。
其中，本实施例中，容纳空间111与检测光源31的结构相适应，其可以为中框10上开设的槽体，或者，容纳空间111也可以中框10上的凹陷结构，在本实施例中，不再对容纳空间111的结构作进一步限定。需要说明的是，屏占比为屏幕面积与整机面积的比例，即屏幕越大，则屏占比越大，对用户体验更有益。全面屏是手机100业界对于超高屏占比手机100设计的一个比较宽泛的定义。全面屏手机100能够提升手机100的颜值，让手机100的看上去更有科技感，另外同样机身正面的面积可以容纳更大的屏幕，对于视觉体验有着显著的提升。
本实施例中，将检测光源31位于液晶显示屏幕20的保护盖板211的边缘区域之下，通过在中框10与检测光源31相对位置处设置容纳空间111，使得至少部分检测光源31位于容纳空间111内且与中框10贴合，从而在实现屏下指纹识别功能的同时，能够缩小手机100下巴区域的增加宽度，有助于电子设备的全面屏的实现，进而解决了现有电子产品中红外光源通过电路板设在电子产品的下巴区域，使得电子产品下巴区域的宽度增加比例较高，阻碍了电子产品的全面屏的实现的问题。
具体的，参考图5所示，指纹识别区域214位于液晶显示屏幕20的显示区域212内。其中，液晶显示屏幕20的显示区域212为液晶显示屏幕20或者手机100上用于显示画面的区域。指纹识别区域214可以具体为供用户进行手指按压以实现指纹输入操作的区域。
为了避免检测光源31的设置影响液晶显示屏幕20的显示区域212的显示效果，参考图5所示，检测光源31位于液晶显示屏幕20的非显示区域213之下，其中，非显示区域213位于显示区域212的***；指纹识别模组32位于液晶显示屏幕20的透光区域之下，以便携带有指纹信息的指纹检测光能够透过透光区域传输至指纹识别模组32。
应理解的是，液晶显示屏幕20上的非显示区域213为液晶显示屏幕20上的不进行显示或者不具有显示功能的区域。
进一步的，容纳空间111位于中框10的边框11上，以使检测光源31位于保护盖板211的边缘区域之下，并在手机100的下巴区域向位于指纹 识别区域214上方的手指发射探测光。
具体的，本实施例中，参考图5所示，为了使得手机100的外观更加圆润、美观，边框11可以为中间厚两边薄的弧形边框，由于边框11靠近保护盖板211的部分厚度较小，无法开设容纳空间111，因此，容纳空间111靠近边框11的中部设置，以便能够在边框11上开设容纳空间111，使至少部分检测光源31位于容纳空间111内，相较于现有技术将红外光源直接设置在手机100下巴区域进行补光的方式，可以减小下巴区域的增加的宽度。需要说明的是，当边框11为厚度一致的条形边框11时，容纳空间111可以位于边框11靠近保护盖板211的一端(即边框11的端部)。
下面，本申请实施例以上述弧形边框为例，对本申请的屏下指纹识别装置作进一步阐述。
参考图5所示，液晶显示屏幕20包括具有保护盖板211和液晶面板212的显示模组21，液晶面板212位于保护盖板211之下，且保护盖板211的一侧设有外露于液晶面板212的延伸部2111，检测光源31位于延伸部2111之下并与液晶面板212并排设置，以便检测光源31发射的探测光能够更好的穿透液晶显示屏幕20，以减小探测光在光路传输中的损耗，提高光线利用率；其中，延伸部2111形成了边缘区域。
为了对液晶显示屏幕20起到更好的支撑作用，参考图5所示，边框11上设有用于支撑延伸部2111的支撑部112，延伸部2111位于支撑部112上且与支撑部112贴合，从而实现液晶显示屏幕20的支撑。其中，本实施例中，延伸部2111与支撑部112的贴合方式包括但不仅限于粘结。
具体的，支撑部112和边框11可以为一体成型结构，或者，支撑部112和边框11可以为分体式结构。为了使得中框10具有更好的强度，本实施例支撑部112和边框11为一体成型结构。
需要说明的是，检测光源31和液晶面板212之间存在一定的间距，该间距所形成的区域可以用于液晶面板212的走线和液晶面板212的第二电路板2121的弯折。
进一步的，参考图5所示，容纳空间111位于支撑部112的下方，以使检测光源31位于延伸部2111之下，且检测光源31与容纳空间111的内壁之间留有间隙，以减少检测光源31发射的探测光被中框10遮挡的可 能性，与此同时，能够便于检测光源31的安装和拆卸。
示例性的，容纳空间111可以为开设在边框11上的用于容纳检测光源31的槽体或者凹陷结构，槽体或者凹陷结构的结构尺寸需大于检测光源31的结构尺寸，以便于检测光源31的安装和拆卸。
为了实现对检测光源31的控制，参考图5所示，检测光源31通过第一电路板311与边框11贴合，第一电路板311与检测光源31电连接，用于控制检测光源31的开启或者关闭，其中，第一电路板311中用于固定检测光源31内的部分位于容纳空间111内。本实施例中，第一电路板311与边框11贴合的方式包括但不仅限于粘结，示例性的，第一电路板311可以通过粘结层60与边框11贴合。
具体的，为了便于第一电路板311与电子设备如手机100的主板50或者其他电路板连接，第一电路板311可以为柔性电路板，便于对第一电路板311进行弯折，以实现第一电路板311与手机100的主板50连接。示例性的，第一电路板311可以穿过中框10直接与手机100的主板50连接，或者，第一电路板311可以通过第二电路板2121与手机100的主板50的连接，通过主板50为检测光源31进行供电，从而实现检测光源31的功能。其中，第一电路板311与主板50或者第二电路板2121的连接方式包括但不仅限于焊接。其中，第二电路板2121为与液晶显示屏幕的液晶面板连接的电路板。在本实施例中，对于第一电路板311与手机100的主板50的连接方式并不做进一步限定。
进一步的，为了增强检测光源31与中框10的贴合强度，第一电路板311还可以通过补强板(在图中未标示)与边框11贴合，补强板用于支撑检测光源31，其中，第一电路板311可以位于补强板和检测光源31之间，通过补强板与边框11贴合，以增强检测光源31与中框10的贴合强度。其中，补强板与边框11贴合的方式包括但不仅限于粘结。
为了避免检测光源31发出的探测光对液晶显示屏幕20的显示效果造成干扰，本实施例中，探测光与液晶显示屏幕20的背光模组22提供的用于显示画面的背光的波长不同，也就是说，探测光或者指纹检测光的波段与背光波段不同。其中，背光模组22位于液晶显示屏幕20的显示模组21之下。因此，本申请实施例的检测光源31发出的探测光不仅能够实现屏下指纹识别， 而且还能降低探测光对液晶显示屏幕20的显示效果造成干扰，以避免对图像的显示效果产生影响。
进一步的，本实施例中，检测光源31发出的探测光可以为红外光，或者其他波长位于可见光的波段之外且能够实现指纹识别的光信号，即本实施例中，探测光包括但不仅限于红外光；背光模组22提供的背光为可见光，以使用户通过液晶显示屏幕20无法看到或察觉上述用于指纹识别的探测光。由于红外光的穿透能力比可见光强，可以更有效地增强穿透液晶显示屏幕20及背光模组22的指纹检测光的信号，从而提高指纹识别效果，因此，本实施例中，探测光优选红外光，如940nm波长的红外光。
进一步的，参考图5所示，指纹识别模组32靠近检测光源31设置，其中检测光源31位于液晶显示屏幕20的非显示区域213的保护盖板211下方，而指纹识别模组32位于液晶显示屏幕20的显示区域212的背光模组22下方。
其中，本实施例中，指纹识别模组32可以参考现有技术中的指纹识别模组32的结构，在现有技术中，对于指纹识别模组32的结构不再做进一步赘述。
进一步的，本实施例中，参考图5所示，中框10还包括位于边框11中部的支撑板12，边框11设在支撑板12的周侧，且边框11与支撑板12之间形成竖直设置的第一容纳腔和第二容纳腔，部分液晶显示屏幕20位于第一容纳腔内，电子设备的主板50位于第二容纳腔内，通过支撑板12将液晶显示屏幕20和电子设备如手机100的主板50进行隔离。本实施例中，支撑板12与边框11组成的中框10可以为一体化成型结构，也可以为分体式结构。其中，支撑板12与边框11为分体式结构时，支撑板12与边框11的连接方式包括但不仅限于粘结或者卡接。
具体的，参考图5所示，本实施例中，指纹识别模组32可以位于液晶显示屏幕20之下，其中，支撑板12上设有第一开孔121，指纹识别模组32与第一开孔121相对设置且与支撑板12贴合，第一开孔121用于使透过液晶显示屏幕20的指纹检测光传输至指纹识别模组32。
具体的，参考图5所示，指纹识别模组32可以整体贴合在中框10的支撑板12的下表面且位于第一开孔121之下，或者，至少部分指纹识别模组 32可以位于第一开孔121处。在本实施例中，对于指纹识别模组32的设置方式并不做进一步限定，只要满足指纹检测光能够透过第一开孔121进入指纹识别模组32即可。
其中，第一开孔121的开孔形状及大小可以满足指纹检测光基本可以透过，以避免由于指纹检测光无法正常透过中框10而影响指纹图像的获取，在本实施例中，对于第一开孔121的大小以指纹识别模组32的接收光路为准。
或者，作为一种可替换的方式，指纹识别模组32还可以与液晶显示屏幕20的背光模组22的底部贴合，且指纹识别模组32通过第一开孔121设在支撑板12上。其中，指纹识别模组32与背光模组22的贴合方式包括但不仅限于粘结。
为了使得携带有指纹信息的指纹检测光能够透过液晶显示屏幕20，液晶显示屏幕20上设有用于使指纹检测光透过背光模组22传输至指纹识别模组32的透光区域。
需要说明的是，在实际应用中，可以根据需要对检测光源31、透光区域、以及指纹识别模组32之间的相对位置进行调整，但是调整后的检测光源31、透光区域、以及指纹识别模组32之间的相对位置，需满足检测光源31发射的探测光能够照射到指纹识别区域214上方的手指，且经手指反射或透射形成的指纹检测光能够透过背光模组22的透光区域进入指纹识别模组32。
进一步的，液晶显示屏幕20包括背光模组22，背光模组22包括可透过指纹检测光的光学模片221、以及钢板222，指纹识别模组32位于钢板222之下，且钢板222在与指纹识别模组32的相对位置处设有第二开孔2221，第二开孔2221用于使透过光学模片221的指纹检测光传输至指纹识别模组32，其中，第二开孔2221为透光区域。
其中，第二开孔2221的开孔形状及大小可以满足指纹检测光基本可以透过，以避免由于指纹检测光无法正常透过液晶显示屏幕20中的背光模组22而影响指纹图像的获取，在本实施例中，对于第二开孔2221的大小以指纹识别模组32的接收光路为准。
具体的，背光模组22设置在液晶面板212下方，用于为液晶面板212提供背光源；背光模组22包括背光光源223，背光光源发出的可见光经过光学模片221转换为均匀地面光源并照射液晶面板212以使其显示画面。需要 说明的是，本实施例中，光学模片221可以包括反射膜、导光板、增亮膜等，光学模片221可以参考现有技术中至少部分可以使得指纹检测光穿过的光学模片221，在本实施例中，不再对其作进一步赘述。
本申请提供的屏下指纹识别装置中，将检测光源位于液晶显示屏幕的保护盖板的边缘区域之下，通过在中框与检测光源相对位置处设置容纳空间，使得至少部分检测光源位于容纳空间内且与中框贴合，从而在实现屏下指纹识别功能的同时，能够缩小手机下巴区域的增加宽度，有助于电子设备的全面屏的实现。
实施例二
图6是本申请实施例二提供的一种检测光源与中框的装配示意图，图7是本申请实施例二提供的另一种检测光源与中框的装配示意图。
在上述实施例一的基础上，参考图6和图7所示，由于检测光源31的至少部分埋入中框10，为了避免检测光源31发光区域内的探测光被中框10遮挡，检测光源31的发光区域位于检测光源31靠近指纹识别区域214的一侧，以使发光区域内的探测光能够发射出中框10，用于增大照射到手指上的探测光的强度。
进一步的，参考图7所示，检测光源31包括用于发射探测光的发光元件312，为了使检测光源31的发光区域位于检测光源31靠近指纹识别区域214的一侧，发光元件312可以位于检测光源31靠近指纹识别区域214的一侧，和/或，发光元件312可以倾斜设置在检测光源31内，以使发光区域内的探测光能够发射出中框10，用于增大照射到指纹识别区域214上方的手指上的探测光的强度。
具体的，本实施例中，发光元件312可以位于检测光源31靠近指纹识别区域214的一侧，或者，发光元件312可以倾斜设置在检测光源31内，亦或者，发光元件312可以位于检测光源31靠近指纹识别区域214的一侧时倾斜设置在检测光源31内，以使检测光源31发光区域内的探测光能够发射出中框10，用于增大照射到指纹识别区域214上方的手指上的探测光的强度。在本实施例中，对于发光元件312在检测光源31组件内的设置方式并不做进一步限定。
应理解的是，参考图7所示，发光元件312在检测光源31内的倾斜角度与检测光源31在容纳空间111内的设置方式(即检测光源31的部分结构位于容纳空间111内或者检测光源31的整体结构位于容纳空间111内)、以及检测光源31的发光区域(即检测光源31的照射角度)有关。因此，本实施例可以根据检测光源31在容纳空间111内的设置方式、以及检测光源31的发光区域，对发光元件312的倾斜角度进行调整，只需要满足发光元件312可以倾斜设置在检测光源31内，以使发光区域内的探测光能够发射出中框10，用于增大照射到指纹识别区域214上方的手指上的探测光的强度即可。在本实施例中，对于发光元件312在检测光源31内的倾斜角度并不做进一步限定。
需要说明的是，为了使检测光源31的发光区域位于检测光源31靠近指纹识别区域214的一侧，作为一种可替代的方式，本实施例中，还可以通过在检测光源31内设置光学元件(在图中未标示)，通过光学元件对检测光源31发光角度进行改变，以使发光区域内的探测光能够发射出中框10，用于增大照射到手指上的探测光的强度。其中，本实施例中，光学元件包括但不见限于透镜。
具体的，检测光源31可以为红外光源，其发出的探测光均为红外光，因此探测光照射到手指并在手指反射或透射形成的指纹检测光也为红外光。示例性的，检测光源31可以为红外灯、红外的垂直腔面发射激光器(Vertical Cavity Surface Emitting Laser，简称VCSEL)、红外的激光二极管(Laser Diode)等红外光源，在本实施例中，对于检测光源31的种类并不做进一步限定。需要说明的是，本实施例中，发光元件312被封装后形成检测光源31。相应的，发光元件312为上述检测光源31内能够发光的元件(如发光芯片)，发光元件312可以参考现有的上述检测光源31内能够发光的元件。在本实施例中，对于发光元件312不再做进一步赘述。
本申请提供的屏下指纹识别装置中，将检测光源位于液晶显示屏幕的保护盖板的边缘区域之下，使得至少部分检测光源位于容纳空间内且与中框贴合，与此同时，通过将检测光源的发光区域位于检测光源靠近指纹识别区域的一侧，以使发光区域内的探测光能够发射出中框，从而在缩小手机下巴区域的增加宽度的同时，能够提高屏下指纹识别的效果，有助于电子设 备的全面屏的实现。
实施例三
图8是本申请实施例三提供的一种装配有屏下指纹识别装置的手机的结构示意图。
在上述实施例一和实施例二的基础上，当中框10的边框11采用弧形边框时，如上述实施例中的描述，弧形边框靠近保护盖板211的部分的厚度仅为0.6mm，无法开设容纳空间111，而边框中部的厚度约为1.3mm，因此，容纳空间111的开设需靠近边框11的中部。由于容纳空间111靠近中框10的边框11的中部，相较于现有技术将检测光源31直接设在手机100的下巴区域(如图3所示)，使得检测光源31距离液晶显示屏幕20的保护盖板211的距离较远，检测光源31的部分发光区域可能受阻，导致检测光源31的光线利用率不高。
为此，参考图8所示，本实施例中，中框10和液晶显示屏幕20的第二电路板2121在与检测光源31的发光区域的相对位置处设有反射层40，通过该反射层40对照射的到中框10和/或第二电路板2121上的用于指纹识别的探测光进行反射，以避免中框10或第二电路板2121对探测光进行阻挡，使发光区域内的探测光发射出保护盖板211，从而提高检测光源31的光线利用率，进而增大照射到指纹识别区域214上方的手指上的探测光的强度。其中，第二电路板2121与液晶显示屏幕20的液晶面板212连接。
具体的，本实施例中，参考图8所示，反射层40可以分别设在边框11上且与发光区域相对位置处、以及第二电路板2121朝向检测光源31的一面，用于对照射在第二电路板2121上的探测光进行反射。示例性的，参考图8所示，反射层40可以设在容纳空间111内与发光区域相对位置处，并向容纳空间111的外部延伸并覆盖在支撑部112上，为了使被第二电路板2121阻挡的探测光透过保护盖板211并照射到指纹识别区域214上方的手指上，被阻挡的探测光需要经过两次反射。
具体的，本实施例中，参考图8所示，第二电路板2121设在液晶显示屏幕20的液晶面板212和背光模组22的同一侧，且靠近检测光源31设置；其中，第二电路板2121位于支撑板12之上。为了便于第二电路板2121 的弯折，第二电路板2121可以为柔性电路板。本实施例中，可以通过将第二电路板2121进行弯折并围设在液晶显示屏幕20的液晶面板212和背光模组22的同一侧，并实现与手机100的主板50的连接。其中，第二电路板2121与主板50的连接方式包括但不仅限于焊接。
进一步的，本实施例中，反射层40可以为现有技术中的用于对探测光进行反射的反射膜材，或者，反射层40可以为采用反射材料喷涂形成的用于反射探测光的涂层。示例性的，反射材料包括但不仅限于银或者铝。反射膜材可以参见现有技术中能够对用于指纹识别的探测光具有较高反射率的膜材，其中，较高的反射率指的是反射率大于等于90％，在本实施例中，不再对其结构作进一步赘述。
需要说明的是，当检测光源31全部位于边框11上的容纳空间111时，为了避免检测光源31发射的探测光被中框10或者第二电路板2121阻挡，可以将检测光源31的发光区域位于检测光源31靠近指纹识别区域214的一侧、以及在中框10和第二电路板2121在与检测光源31的发光区域的相对位置处设有反射层40，来改变检测光源31的发光角度，以使检测光源31发射的探测光能够射出保护盖板211并照射到指纹识别区域214上方的手指上，用于指纹识别。
本申请提供的屏下指纹识别装置中，将检测光源位于液晶显示屏幕的保护盖板的边缘区域之下，使得至少部分检测光源位于容纳空间内且与中框贴合，与此同时，通过中框和液晶显示屏幕的第二电路板上反射层的设置，以提高检测光源的光线利用率，从而在在缩小手机下巴区域的增加宽度的同时，能够提高屏下指纹识别的效果，有助于电子设备的全面屏的实现。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应作广义理解，例如，可以是固定连接，也可以是通过中间媒介间接相连，可以是两个元件内部的连通或者两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请的描述中，需要理解的是，术语“上”、“下”、“前”、“后”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或者位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述， 而不是指示或者暗示所指的装置或者元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。在本申请的描述中，“多个”的含义是两个或两个以上，除非是另有精确具体地规定。
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”、“第三”、“第四”等(如果存在)是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请的实施例如能够以除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、***、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：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申请各实施例技术方案的范围。

Claims (24)

  1. 一种屏下指纹识别装置，应用于具有液晶显示屏幕和中框的电子设备，其特征在于，包括检测光源和指纹识别模组，所述检测光源位于所述液晶显示屏幕的保护盖板的边缘区域之下，所述中框用于支撑所述液晶显示屏幕，且所述中框在与所述检测光源相对位置处设有容纳空间，所述检测光源至少部分位于所述容纳空间内且与所述中框贴合；所述指纹识别模组用于设置在所述液晶显示屏幕的下方，且其指纹识别区域位于所述液晶显示屏幕的显示区域；其中，所述检测光源用于向位于所述液晶显示屏幕上的指纹识别区域上方的手指发射用于指纹识别的探测光，所述指纹识别模组用于接收所述探测光照射到所述手指而形成且穿过所述液晶显示屏返回的指纹检测光，以获取所述手指的指纹信息。
  2. 根据权利要求1所述的屏下指纹识别装置，其特征在于，所述容纳空间位于所述中框的边框上。
  3. 根据权利要求2所述的屏下指纹识别装置，其特征在于，所述边框为中间厚两边薄的弧形边框，所述容纳空间靠近所述边框的中部设置。
  4. 根据权利要求3所述的屏下指纹识别装置，其特征在于，所述液晶显示屏幕包括具有所述保护盖板和液晶面板的显示模组，所述液晶面板以为位于所述保护盖板之下，且所述保护盖板的一侧设有外露于所述液晶面板的延伸部，所述检测光源位于所述延伸部之下并与所述液晶面板并排设置；其中，所述延伸部形成了所述边缘区域。
  5. 根据权利要求4所述的屏下指纹识别装置，其特征在于，所述边框上设有用于支撑所述延伸部的支撑部，所述延伸部位于所述支撑部上且与所述支撑部贴合。
  6. 根据权利要求5所述的屏下指纹识别装置，其特征在于，所述容纳空间位于所述支撑部的下方，且所述检测光源与所述容纳空间的内壁之间留有间隙。
  7. 根据权利要求2所述的屏下指纹识别装置，其特征在于，所述容纳空间为开设在所述边框上的用于容纳所述检测光源的槽体或者凹陷结构。
  8. 根据权利要求2所述的屏下指纹识别装置，其特征在于，所述检 测光源通过第一电路板与所述边框贴合，所述第一电路板与所述检测光源电连接，用于控制所述检测光源的开启或者关闭。
  9. 根据权利要求8所述的屏下指纹识别装置，其特征在于，所述第一电路板为柔性电路板。
  10. 根据权利要求9所述的屏下指纹识别装置，其特征在于，所述第一电路板通过补强板与所述边框贴合，所述补强板用于支撑所述检测光源，其中，所述第一电路板位于所述补强板和所述检测光源之间。
  11. 根据权利要求1所述的屏下指纹识别装置，其特征在于，所述探测光与所述液晶显示屏幕的背光模组提供的用于显示画面的背光的波长不同，其中，所述背光模组位于所述液晶显示屏幕的显示模组之下。
  12. 根据权利要求11所述的屏下指纹识别装置，其特征在于，所述检测光源发出的探测光为红外光，所述背光模组提供的背光为可见光。
  13. 根据权利要求1-12任意一项所述的屏下指纹识别装置，其特征在于，所述检测光源的发光区域位于所述检测光源靠近所述指纹识别区域的一侧，以使所述发光区域内的所述探测光能够发射出所述中框，用于增大照射到所述手指上的所述探测光的强度。
  14. 根据权利要求13所述的屏下指纹识别装置，其特征在于，所述检测光源包括用于发射所述探测光的发光元件，所述发光元件位于所述检测光源靠近所述指纹识别区域的一侧；
    和/或，所述发光元件倾斜设置在所述检测光源内，以使发光区域内的所述探测光能够发射出所述中框，用于增大照射到所述指纹识别区域上方的所述手指上的所述探测光的强度。
  15. 根据权利要求1-14任意一项所述的屏下指纹识别装置，其特征在于，所述中框和所述液晶显示屏幕的第二电路板在与所述检测光源的发光区域的相对位置处设有反射层，其中，所述第二电路板与所述液晶显示屏幕的液晶面板连接，所述反射层用于使所述发光区域内的所述探测光发射出所述保护盖板，以增大照射到所述指纹识别区域上方的所述手指上的所述探测光的强度。
  16. 根据权利要求15所述的屏下指纹识别装置，其特征在于，所述反射层分别设在所述容纳空间内且与所述发光区域相对位置处、以及所述 第二电路板朝向所述检测光源的一面。
  17. 根据权利要求15所述的屏下指纹识别装置，其特征在于，所述第二电路板设在所述液晶面板和背光模组的同一侧，且靠近所述检测光源设置。
  18. 根据权利要求15或16所述的屏下指纹识别装置，其特征在于，所述反射层为用于对所述探测光进行反射的反射膜材，或者，所述反射层为采用反射材料喷涂形成的用于反射所述探测光的涂层。
  19. 根据权利要求1所述的屏下指纹识别装置，其特征在于，所述指纹识别模组靠近所述检测光源设置，其中所述检测光源位于所述液晶显示屏幕的非显示区域的保护盖板下方，而所述指纹识别模组位于所述液晶显示屏幕的显示区域的背光模组下方。
  20. 根据权利要求18所述的屏下指纹识别装置，其特征在于，所述中框还包括位于所述边框中部的支撑板，所述边框设在所述支撑板的周侧，且所述边框与所述支撑板之间形成竖直设置的第一容纳腔和第二容纳腔，部分所述液晶显示屏幕位于所述第一容纳腔内，所述电子设备的主板位于第二容纳腔内。
  21. 根据权利要求18所述的屏下指纹识别装置，其特征在于，所述指纹识别模组位于所述液晶显示屏幕之下，其中，所述支撑板上设有第一开孔；所述指纹识别模组与所述第一开孔相对设置，且与所述支撑板或者所述液晶显示屏幕的背光模组的底部贴合，所述第一开孔用于使透过所述液晶显示屏幕的所述指纹检测光传输至所述指纹识别模组。
  22. 根据权利要求20所述的屏下指纹识别装置，其特征在于，所述液晶显示屏幕上设有用于使所述指纹检测光透过背光模组传输至所述指纹识别模组的透光区域。
  23. 根据权利要求21所述的屏下指纹识别装置，其特征在于，所述液晶显示屏幕包括所述背光模组，所述背光模组包括可透过所述指纹检测光的光学模片、以及钢板，所述指纹识别模组位于所述钢板之下，且所述钢板在与所述指纹识别模组的相对位置处设有第二开孔，所述第二开孔用于使透过所述光学模片的所述指纹检测光传输至所述指纹识别模组，其中，第二开孔为所述透光区域。
  24. 一种电子设备，其特征在于，包括中框、设在所述中框内的液晶显示屏幕、以及如权利要求1-23中任意一项所述的屏下指纹识别装置。
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