WO2021087652A1 - 液晶显示屏指纹识别系统、电子装置及指纹识别模组 - Google Patents

液晶显示屏指纹识别系统、电子装置及指纹识别模组 Download PDF

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Publication number
WO2021087652A1
WO2021087652A1 PCT/CN2019/115290 CN2019115290W WO2021087652A1 WO 2021087652 A1 WO2021087652 A1 WO 2021087652A1 CN 2019115290 W CN2019115290 W CN 2019115290W WO 2021087652 A1 WO2021087652 A1 WO 2021087652A1
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WO
WIPO (PCT)
Prior art keywords
fingerprint identification
module
fingerprint
liquid crystal
crystal display
Prior art date
Application number
PCT/CN2019/115290
Other languages
English (en)
French (fr)
Inventor
熊峰
刘凯
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/CN2019/115290 priority Critical patent/WO2021087652A1/zh
Priority to CN201980003975.0A priority patent/CN111066028B/zh
Publication of WO2021087652A1 publication Critical patent/WO2021087652A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G—PHYSICS
    • 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
    • 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
    • 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
    • G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
    • 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

Definitions

  • This application relates to the field of biometrics technology, in particular to a liquid crystal display fingerprint identification system, electronic device and fingerprint identification module.
  • OLED Organic Light-Emitting Diode
  • Mobile phones using OLED screens use OLED screen pixels to emit light as the light source. The light shines on the finger and is reflected by the finger, passing through the phone screen and The optical lens is received by the sensor under the screen to realize fingerprint image collection and fingerprint recognition.
  • Liquid Crystal Display has many advantages such as thin body, power saving, and no radiation, and is widely used in electronic products such as TVs, computers, and mobile phones. Since the light reflected/transmitted by the finger cannot penetrate the backlight module, and cannot form the optical signal detection circuit of the fingerprint under the optical screen, the optical fingerprint recognition solution based on the LCD screen has not yet been mass-produced, and the backlight of the backlight module needs to be improved. Film material to reduce the interference to the optical path processing unit, so that the fingerprint image after passing through the LCD screen meets the requirements of fingerprint recognition.
  • the backlight film material of the backlight module includes a brightness enhancement film, a diffusion sheet, a light guide plate, and a reflection sheet. Each layer of optical film will interfere with the fingerprint image, so it is necessary to develop a specific optical film for optical fingerprint recognition.
  • This application provides a liquid crystal display fingerprint identification system, electronic device and fingerprint identification module to solve the problem that the existing backlight film cannot meet the requirements of fingerprint identification and screen display at the same time, so that fingerprint identification under the LCD optical screen cannot be realized .
  • the first aspect of the present application provides a liquid crystal display fingerprint identification system, including a display module, a backlight module, and a fingerprint identification module, and one end of the backlight module close to the fingerprint identification module is provided with a bending area A accommodating space for accommodating the fingerprint identification module is formed between the bending area and the display module, and the fingerprint identification module is located in the accommodating space.
  • the backlight module is bent toward a side away from the display module to form the bent area.
  • the width of the bending area is equal to the width of the backlight module.
  • the width of the bending area is smaller than the width of the backlight module.
  • the distance between the bending point of the bending area and the end of the backlight module close to the fingerprint recognition module is less than 40 mm.
  • the bending angle of the bending area is less than 7°.
  • the end of the backlight module facing away from the fingerprint recognition module is a flat area, and the flat area is smoothly connected with the bending area.
  • the backlight module is fixed on a fixing member
  • the fixing member includes: a frame-shaped fixing member body and a first supporting part for fixing the backlight module, so The first supporting part is arranged on the inner side wall of the fixing member body to fix the backlight module in the fixing member body.
  • the fixing member further includes: a second support portion for fixing the bending area, and the bending area is fixed to the display module through the second support portion on.
  • the second supporting portion is located on the side wall of the fixing member body close to one end of the bending area.
  • the second supporting portion is higher than the first supporting portion, and an edge of the first supporting portion close to the backlight module is exposed from the second supporting portion.
  • the first support portion and the second support portion are both steps.
  • the backlight module is bonded to the first support part by a first light-shielding glue, and the bending area is bonded to the display module near the display module by a second light-shielding glue. Said one side of the backlight module.
  • both the first light-shielding glue and the second light-shielding glue are provided with a safety distance from the display area of the display module, wherein the safety distance is greater than 0.2 mm.
  • the fixing member is an iron frame or a glue-iron integrated frame.
  • the backlight module includes: a brightness enhancement film, a diffusion film, a light guide plate, and a reflective film stacked in sequence, wherein the brightness enhancement film is close to one side of the display module, and the The reflective film is arranged on the side facing away from the display module.
  • an end of the light guide plate close to the fingerprint recognition module is provided with a second bending portion adapted to the structure of the bending area.
  • the uniformity of the brightness of the visible light emitted by the backlight module by the light guide plate is greater than 90%.
  • At least one outlet slot is opened at one end of the fixing member close to the fingerprint identification module to allow the backlight module and the flexible circuit board of the fingerprint identification module to pass through
  • the outlet trough is outlet.
  • the effective light path area is the detection light of the fingerprint recognition module and the The finger reflects and enters the largest area formed by the detection light of the fingerprint identification module.
  • the gap is greater than 0.3 mm.
  • the fingerprint identification module includes: an optical path processing unit, and the optical path processing unit is used to reduce the thickness of the fingerprint identification module.
  • the optical path processing unit includes: an optical element, a reflective element, and a sensor for fingerprint recognition, wherein the reflective element is located below the sensor, and the optical element is located on the The reflective element is located on the same side of the sensor and close to the fingerprint detection area on the display module, and the optical element is used to converge the detection light passing through the display module onto the reflective element, And it is reflected to the sensor by the reflecting element for fingerprint identification.
  • the fingerprint identification module further includes a detection light source for emitting the detection light to a finger above the fingerprint detection area, and the detection light source is located above the sensor.
  • the fingerprint identification module further includes a first bracket for fixing and accommodating the detection light source, and the first bracket is provided with a first window above the detection light source. Structure, the detection light source emits the detection light to the fingerprint detection area through the first window opening structure.
  • the optical element and the sensor are attached to the bottom of the first bracket.
  • the fingerprint identification module further includes a second bracket for protecting the optical path processing unit, and an accommodating space for accommodating the optical path processing unit is provided in the second bracket, wherein ,
  • the second bracket is provided with a second window opening structure at a position opposite to the optical element, and the second window opening structure is used to transmit the detection light passing through the display module to the sensor .
  • the reflective element there is a distance between the reflective element and the sensor, so that the sensor receives the detection light that carries fingerprint information after being reflected by the reflective element.
  • the reflective element is attached to the protruding structure on the sensor, or the reflective element is provided on the bottom of the second bracket.
  • the gaps on both sides of the fingerprint identification module are filled with third brackets.
  • the second aspect of the present application provides an electronic device including any one of the above-mentioned liquid crystal display fingerprint identification systems.
  • the electronic device is provided with a battery accommodating cavity, and there is a distance between the bending point of the bending area and the battery accommodating cavity.
  • the distance between the bending point and the end of the backlight module close to the fingerprint recognition module is less than 40 mm.
  • the bending angle of the bending area is less than 7°.
  • the third aspect of the present application provides a fingerprint identification module suitable for a liquid crystal display screen.
  • One end of the backlight module of the liquid crystal display screen is provided with a bending area and forms an accommodation space with the display module.
  • the fingerprint identification The fingerprint detection area of the module is at least partially located in the display area of the liquid crystal display, and it includes an optical element, a reflective element, and a sensor for fingerprint recognition accommodated in the accommodation space, wherein the optical element is located in the The reflective element is on the same side of the sensor and close to the fingerprint detection area of the liquid crystal display, and the optical element is used to converge the detection light formed by a finger above the liquid crystal display and passing through the display module On the reflective element, the reflective element is used to reflect the detection light to the sensor, and the sensor is used to receive the detection light for fingerprint recognition.
  • the fingerprint recognition module further includes a detection light source for emitting the detection light to a finger above the fingerprint detection area, the detection light source is located above the sensor, and The detection light has a different wavelength from the backlight provided by the backlight module of the liquid crystal display screen.
  • the fingerprint identification module further includes a first bracket for fixing and accommodating the detection light source, and the first bracket is provided with a first window above the detection light source. Structure, the detection light source emits the detection light to the fingerprint detection area through the first window opening structure.
  • the optical element and the fingerprint recognition sensor are attached to the bottom of the first bracket.
  • the fingerprint identification module further includes a second bracket for protecting the optical path processing unit, and an accommodating space for accommodating the optical path processing unit is provided in the second bracket, wherein ,
  • the second bracket is provided with a second window opening structure at a position opposite to the optical element, and the second window opening structure is used to transmit the detection light passing through the display module to the sensor .
  • the reflective element there is a gap between the reflective element and the sensor, so that the sensor receives the detection light that carries fingerprint information and is reflected by the reflective element, and the reflective element is attached to the sensor. It is attached to the protruding structure on the sensor, or the reflective element is provided at the bottom of the second bracket.
  • This application provides a liquid crystal display screen fingerprint identification system, an electronic device, and a fingerprint identification module, including a display module, a backlight module, and a fingerprint identification module.
  • the backlight module has a bending area at one end close to the fingerprint identification module , A fingerprint recognition module accommodating space is formed between the bending area and the display module, so that the fingerprint recognition module is located in the accommodating space; An accommodating space is formed in the accommodating space so that the fingerprint identification module is located in the accommodating space; when the fingerprint identification module is located in the accommodating space, the fingerprint identification module is located on the backlight module. , And the detection light reflected by the finger on the display module does not need to pass through the backlight module, avoiding the impact on the fingerprint recognition image.
  • this application changes the structure of the backlight module to realize fingerprint recognition under the LCD optical screen while ensuring the display effect of the display module, and solves the problem that the existing backlight film cannot meet the requirements of fingerprint recognition and display module at the same time.
  • the display requirements make it impossible to realize the problem of fingerprint recognition under the LCD optical screen.
  • FIG. 1 is a schematic structural diagram of a fingerprint identification system on a liquid crystal display screen provided by Embodiment 1 of the application;
  • FIG. 2 is a schematic structural diagram of a fixing member provided in Embodiment 1 of the application;
  • Fig. 3 is a partial enlarged schematic diagram of part A in Fig. 2;
  • FIG. 4 is a schematic structural diagram of a backlight module provided by Embodiment 2 of the present application.
  • FIG. 5 is a schematic structural diagram of a fingerprint identification module provided in the fourth embodiment of the present application.
  • FIG. 6 is an exploded schematic diagram of a fingerprint recognition system on a liquid crystal display screen provided by the sixth embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a display module provided by Embodiment 7 of the present application.
  • FIG. 8 is a schematic structural diagram of another display module provided by Embodiment 7 of the present application.
  • FIG. 9 is a partial schematic diagram of yet another display module provided by Embodiment 7 of the present application.
  • Display module-1 display cover-101; liquid crystal panel-102; lower polarizer-103; display area-104; non-display area-105; fingerprint detection area-106; infrared-transmitting ink-107; infrared-transmitting ink area -108; backlight module-2; brightness enhancement film-201; diffusion film-202; light guide plate-203; second bending part-2031; reflective film-204; backlight light source-205; bending area-206; flat Straight area-207; first shading glue-3; second shading glue-4; fingerprint recognition module-5; optical path processing unit-501; optical element-5011; reflective element-5012; sensor-5013; detection light source-502 ;Effective light path area-503; Detecting light-emitting area-504; first bracket-505; first window structure-5051; second bracket-506; flexible circuit board-6; accommodation space-7; third bracket-8 Fixing part-9; Fixing part body-901; First supporting part-902; Second supporting part-903; Iron frame-904; Plastic frame-905; Outlet groove-906; First
  • LCD screens have many advantages such as thin body, power saving, and no radiation, and are widely used in electronic products such as TVs, computers, and mobile phones. Since the light reflected/transmitted by the finger cannot penetrate the backlight module, and cannot form the optical signal detection circuit of the fingerprint under the optical screen, the optical fingerprint recognition solution based on the LCD screen has not yet been mass-produced, and the backlight of the backlight module needs to be improved. Film material to reduce the interference to the optical path processing unit, so that the fingerprint image after passing through the LCD screen meets the requirements of fingerprint recognition.
  • the backlight film material of the backlight module includes a brightness enhancement film, a diffusion sheet, a light guide plate, and a reflection sheet. Each layer of optical film will interfere with the fingerprint image. Therefore, it is necessary to develop a specific optical film for optical fingerprint recognition.
  • the existing backlight film materials cannot meet the requirements of fingerprint imaging and screen display at the same time, so that fingerprints under LCD optical screens have relatively large technical problems.
  • this application provides a liquid crystal display fingerprint identification system, electronic device, and fingerprint identification module to solve the problem that the existing backlight film cannot meet the requirements of fingerprint imaging and screen display at the same time, so that the fingerprint under the LCD optical screen cannot be realized. Identify the problem.
  • Fig. 1 is a schematic structural diagram of a fingerprint identification system for a liquid crystal display provided in embodiment 1 of this application
  • Fig. 2 is a structural schematic diagram of a fixing member provided in embodiment 1 of this application
  • Fig. 3 is a partial enlarged schematic diagram of part A in Fig. 2 .
  • an embodiment of the application provides a liquid crystal display fingerprint identification system, which includes a display module 1, a backlight module 2, and a fingerprint identification module 5.
  • the backlight module 2 is close to the fingerprint identification module
  • One end of 5 is provided with a bending area 206.
  • a storage space 7 for accommodating the fingerprint identification module 5 is formed between the bending area 206 and the display module 1, and the fingerprint identification module 5 is located in the storage space 7.
  • the backlight module 2 is bent at one end close to the fingerprint recognition module 5 and an accommodation space 7 is formed between the backlight module 2 and the display module 1, so that the fingerprint recognition
  • the module 5 is located in the accommodating space 7; when the fingerprint identification module 5 is located in the accommodating space 7, the fingerprint identification module 5 is located above the backlight module 2 and below the display module 1.
  • the fingerprint identification module 5 The detection light emitted and the detection light reflected by the finger in the fingerprint detection area 106 on the display module 1 do not need to pass through the backlight module 2, thereby solving the problem of the detection light for fingerprint recognition when the fingerprint recognition under the LCD optical screen is realized.
  • the detection light reflected by the finger in the fingerprint detection area 106 on the display module 1 cannot penetrate the backlight module 2, so that the problem of the optical signal detection circuit of the fingerprint under the optical screen is formed, and the backlight film material is not changed.
  • the display effect of the display module 1 can be ensured.
  • the fingerprint identification module 5 when the fingerprint identification module 5 is located in the accommodating space 7, the fingerprint identification module 5 is located above the backlight module 2 and below the display module 1. Therefore, when fingerprints need to be identified When the detection light emitted by the fingerprint recognition module 5 can pass through the display module 1 to directly illuminate the finger in the fingerprint detection area 106 and be reflected by the finger, the detection light carrying fingerprint information after being reflected by the finger passes through the display module 1 The fingerprint information is transmitted to the fingerprint identification module 5 for data processing, and then the fingerprint identification is realized. When the fingerprint identification module 5 is located in the accommodating space 7, the fingerprint identification module 5 is located above the backlight module 2 and below the display module 1.
  • the optical path processing unit 501 includes the detection light and the detection light reflected by the finger, which avoids the influence on the fingerprint recognition image and improves the accuracy of fingerprint recognition.
  • the detection light emitted by the fingerprint identification module 5 is light with a wavelength range outside the wavelength of visible light, where the detection light includes but is not limited to infrared light.
  • the different characteristics of visible light and infrared light in various film materials can be used to ensure that the backlight is uniform, but also to ensure that the light distortion that carries the fingerprint signal is small, and the fingerprint recognition accuracy is high.
  • the size of the accommodating space 7 depends on the structural size of the fingerprint identification module 5, the size of the accommodating space 7 is not further limited in this embodiment. In this embodiment, it is only necessary to ensure that the bending area 206 and the display module The accommodating space 7 formed between the groups 1 can place the required fingerprint identification module 5 in the accommodating space 7, and can ensure the display effect of the display module 1 while achieving fingerprint recognition under the LCD optical screen.
  • the backlight module 2 is bent toward the side away from the display module 1 to form a bending area 206. 5
  • the bending area 206 The smaller the bending angle, the better.
  • the display effect includes but is not limited to the uniformity of display brightness.
  • the width of the bending area 206 is equal to the width of the backlight module 2, that is, the bending area 206 is the backlight module 2 close to the fingerprint recognition module.
  • One end of the group 5 is bent toward the side away from the display module 1 to form a bending area 206, and an accommodation space 7 for accommodating the fingerprint identification module 5 is formed between the bending area 206 and the display module 1. .
  • the width of the bending area 206 is smaller than the width of the backlight module 2, that is, the bending area 206 is the end of the backlight module 2 that is close to the fingerprint recognition module 5 and is partially facing away from the display.
  • One side of the module 1 is bent to form a bending area 206, and an accommodating space 7 for accommodating the fingerprint identification module 5 is formed between the bending area 206 and the display module 1.
  • the area where the backlight module 2 is locally bent at an end close to the fingerprint recognition module 5 may be located at the center of the backlight module 2, or at an eccentric position of the backlight module 2, where the eccentric position It can be understood that the area where the partial bending occurs deviates from the center position of the backlight module 2.
  • the area where the partial bending occurs on the backlight module 2 is not further limited. In this embodiment, it only needs to ensure When the fingerprint recognition module 5 is located in the accommodation space 7 formed between the area where the partial bending occurs and the display module 1, while fingerprint recognition under the LCD optical screen is realized, the display effect of the display module 1 can be guaranteed. can.
  • the fingerprint detection area 106 may be located in the central area of the accommodating space 7, or may be offset from the central area of the accommodating space 7, which is not further limited in this embodiment. It is understandable that when the position of the fingerprint identification module 5 changes, the position of the fingerprint detection area 106 on the display module 1 will also change accordingly. In this embodiment, it is only necessary to ensure that the fingerprint detection area The relative arrangement of 106 and fingerprint identification module 5 can realize fingerprint identification under the screen.
  • the backlight module 2 and the fingerprint identification module 5 are both fixed on the side of the lower polarizer 103 of the display module 1 facing the backlight module 2.
  • the display module 1 includes a display cover 101 and a liquid crystal panel 102 under the display cover 101.
  • the lower polarizer 103 is a part of the liquid crystal panel 102 and is located on the bottom layer of the liquid crystal panel 102. In other words, the lower polarizer 103 is located on the side of the liquid crystal panel 102 close to the backlight module 2. Since the liquid crystal panel is an existing technology, in this embodiment, the structure of the liquid crystal panel 102 will not be further elaborated.
  • the bending point of the bending area 206 and the end of the backlight module 2 near the end of the fingerprint recognition module 5 The distance is less than 40mm to ensure that the fingerprint recognition module 5 can be placed in the accommodating space 7 while avoiding the battery accommodating cavity 10, avoiding the influence of the bending of the backlight module 2 on the battery accommodating cavity 10.
  • the distance between the edge of the end of the battery accommodating cavity 10 close to the fingerprint identification module 5 and the end of the backlight module 2 close to the fingerprint identification module 5 is greater than or equal to 40 mm, therefore, When the distance between the bending point and the end of the backlight module 2 close to the fingerprint identification module 5 in this embodiment is less than 40 mm, the bending point and the bending area 206 can be avoided from the battery accommodating cavity 10 of the electronic device. To meet the needs of electronic devices for large battery capacity.
  • the bending area 206 satisfies the requirement that the fingerprint identification module 5 can be completely placed in the accommodating space 7 formed.
  • the bending angle of the bending area 206 is less than 7°.
  • the end of the backlight module 2 facing away from the fingerprint recognition module 5 is a flat area 207, and the flat area 207 is smoothly connected to the bending area 206.
  • the smooth connection between the straight area 207 and the bent area can be rounded transition connection, or an arc structure can be used for smooth connection, that is, the straight area in this embodiment
  • the smooth connection between 207 and the bending area includes, but is not limited to, the rounded transition connection.
  • the smooth connection between the straight area 207 and the bent area adopts a rounded transition connection with a radius greater than 5 mm.
  • the bending angle is the angle between the bending area 206 of the backlight module 2 and the extension of the straight area 207 toward the end of the fingerprint recognition module 5. angle.
  • the backlight module 2 is fixed on the fixing member 9, and the fixing member 9
  • the backlight module 2 is fixed under the display module 1 to fix the backlight module 2 and the fixing member 9.
  • the end of the fixing member 9 close to the fingerprint recognition module 5 is bent toward the side away from the display module 1 to form a first bending portion 907
  • the end of the fixing member 9 away from the fingerprint identification module 5 is a horizontal part.
  • the structure of the first bending portion 907 is adapted to the structure of the bending region 206.
  • the bending point and the bending angle of the first bending portion 907 are both the same as the bending angle.
  • the bending point and the bending angle of the area 206 are the same.
  • the bending point and the bending angle of the fixing member 9 are different. More details.
  • the fixing member 9 includes a frame-shaped fixing member body 901, and a first supporting portion 902 for fixing the backlight module 2.
  • the first supporting portion 902 is arranged on the inner side wall of the fixing body 901 to fix the backlight module 2 in the fixing body 901.
  • the frame-shaped fixing body 901 that is, the fixing part 9 is frame-shaped, that is, the fixing body 901 is a frame structure, and the first supporting portion 902 is provided on the frame structure.
  • the bottom of the fixing body 901 is a solid plate-like structure, and the plate-like structure is located at the bottom of the backlight module 2 so that the backlight module 2 does not transmit light; or, the bottom of the fixing body 901 It has a hollow structure, and the backlight module 2 is fixed in the frame structure of the fixing body 901.
  • the fixing member 9 further includes: a second supporting portion 903 for fixing the bending area 206, and the bending area 206 is fixed on the display module 1 through the second supporting portion 903 .
  • the second supporting portion 903 is located on the side wall of the fixing body 901 near one end of the bending area 206, that is to say, the second supporting portion 903 is located on the fixing body.
  • the 901 frame structure is located on the side wall at one end of the bending area 206, wherein the second support portion 903 is higher than the frame structure of the fixing body 901, so that the fingerprint recognition module 5 is arranged in the containing space 7 while being bent
  • the folding area 206 is fixed on the display module 1 through the second supporting portion 903.
  • the second supporting portion 903 is higher than the first supporting portion 902, and the edge of the first supporting portion 902 close to the backlight module 2 is exposed to the second supporting portion 903, so that the bending area 206 is fixed on the display module 1 through the second supporting portion 903, the backlight module 2 is fixed in the frame structure through the first supporting portion 902, and the display module 1 and the backlight are fixed by the fixing member 9.
  • a good seal is formed between the modules 2 to prevent foreign matter contamination from affecting the imaging quality during fingerprint recognition and the display effect of the display module 1.
  • the first support portion 902 and the second support portion 903 are both steps to increase the size of the first support portion.
  • the contact area between the 902 and the display module 1 and the second support portion 903 and the display module 1 and the backlight module 2 is to enhance the fixing effect of the backlight module 2 and the bending area 206.
  • the step is a convex structure with a flat top in the prior art. In this embodiment, the detailed description of the step will not be further repeated.
  • the backlight module 2 is bonded to the first support portion 902 through the first light-shielding glue 3, and the bending area 206 is bonded to the display mold through the second light-shielding glue 4 Group 1 is close to the side of the backlight module 2.
  • the side of the backlight module 2 close to the display module 1 is flush with the surface of the first supporting portion 902, or the backlight module 2 is close to the display module.
  • One side of the group 1 is higher than the surface of the first support portion 902, and the first light-shielding glue 3 is at least partially attached to the surface of the first support portion 902, so that the backlight module 2 is close to the side of the display module 1 and the first support
  • the surface of the part 902 is fixed, so that the backlight module 2 can be further fixed in the fixing body 901.
  • the shape of the first light-shielding glue 3 is a "mouth"-shaped structure; correspondingly, because The second supporting portion 903 is located on the side wall of the fixing body 901 close to one end of the bending area 206, and the second supporting portion 903 is bonded to the display module 1 with the second light-shielding glue 4, therefore, the second light-shielding glue 4
  • the shape is adapted to the structure of the second supporting portion 903.
  • the second light-shielding glue 4 has a structure shaped like a "U" shape.
  • first light-shielding glue 3 and the second light-shielding glue 4 are the same kind of light-shielding glue in the prior art.
  • the first and second light-shielding glues in this embodiment only distinguish between light-shielding glues in different positions.
  • the composition of the light-shielding glue will not be described further.
  • the first light-shielding glue 3 and the second light-shielding glue 4 are both connected to the display area of the display module 1.
  • the fixing member 9 is an iron frame or a plastic-iron integrated frame.
  • the plastic-iron integrated frame is a commonly used frame in the prior art.
  • the fixing member 9 forms an integrated structure by injecting the plastic frame 905 on the inner side wall of the iron frame 904 to improve the strength of the product fixed on it.
  • the plastic frame 905 is no longer used for the integral frame of the iron frame. The structure is further elaborated.
  • the backlight module is bent at one end close to the fingerprint recognition module and an accommodating space is formed between the backlight module and the display module, so that the fingerprint recognition module is located in the accommodating space; the fingerprint recognition module is located in the accommodating space
  • the fingerprint recognition module is located on the backlight module, when fingerprint recognition is performed, the detection light emitted by the fingerprint recognition module and the detection light reflected by the finger on the display module do not need to pass through the backlight module, thus solving the problem.
  • the existing backlight film cannot meet the requirements of fingerprint imaging and screen display at the same time, so that the problem of fingerprint recognition under the LCD optical screen cannot be realized.
  • FIG. 4 is a schematic structural diagram of a backlight module provided in the second embodiment of the present application.
  • the backlight module 2 in this embodiment includes a brightness enhancement film 201, a diffusion film 202, a light guide plate 203, and a reflection film 204 stacked in sequence.
  • the bright film 201 is close to the display module 1 side, and the reflective film 204 is disposed on the side away from the display module 1.
  • the reflective film 204 is used to reflect the light source into the light guide plate 203 to improve the utilization rate of the light source.
  • the light guide plate 203 is used to guide the scattering direction of the light source to improve the brightness of the display module 1 and ensure the uniformity of the brightness of the display module 1.
  • the diffusion film 202 is used to convert the uneven light source emitted from the light guide plate 203 into a uniform light source diverging to various angles.
  • the brightness enhancement film 201 is arranged between the diffuser film 202 and the display module 1 to improve the angular distribution of the light source. The light source emitted from the diffuser film 202 uniformly diverging to various angles can be converged to the axial angle. Increase the axial brightness while increasing the total luminous flux.
  • the brightness enhancement film 201 may be a single-layer prism film, a double-layer prism film or a brightness enhancement film 201 without a prism structure.
  • the structure of the brightness enhancement film 201 is not further limited.
  • the light guide plate 203 is provided with light guide particles, and the light guide particles form light guide points on the light guide plate 203.
  • the light will diffuse at various angles. Then, the destruction of the reflection condition is emitted from the front of the light guide plate 203 to illuminate the display module 1 to ensure that the backlight module 2 can provide backlight normally.
  • the light guide plate 203 has a larger thickness than other backlight film materials, in order to make the light guide plate 203 fit in the fixing member 9 with the first bending portion 907 and the horizontal portion of the fixing member 9 to
  • the bending area 206 of the backlight module 2 is formed, and an end of the light guide plate 203 close to the fingerprint recognition module 5 is provided with a second bending portion 2031 adapted to the structure of the bending area 206, wherein the second bending portion 2031
  • the bending point and bending angle of the first bending portion 907 are the same as the bending point and bending angle of the first bending portion 907.
  • the bending point and bending angle of the second bending portion 2031 are not further described. Go into details.
  • the uniformity of the visible light brightness from the light guide plate 203 to the backlight module 2 is greater than 90%.
  • the particle size of the light guide particles on the second bending portion 2031 and the density of the light guide particles on the second bending portion 2031 can be adjusted, so that the light guide plate 203 is aligned with each other.
  • the uniformity of the brightness of the visible light emitted by the backlight module 2 is greater than 90%, or, in this embodiment, the light guide plate 203 in the prior art can be screened to ensure that the second light guide plate 203 is formed after bending.
  • the uniformity of the light guide plate 203 behind the bent portion 2031 to the brightness of the visible light emitted by the backlight module 2 is greater than 90%.
  • the light guide particles can be any of the tiny particles in the prior art that can change the light and diffuse the light to various angles, such as plastic particles or highly reflective materials. In this embodiment, what is the specific use? The light guide particles are not further limited.
  • the brightness enhancement film 201, the diffusion film 202, and the reflection film 204 are fixed in the fixing member 9, and the brightness enhancement film 201, the diffusion film 202 and the reflection film 204 are present in the fixing member 9 through the fixing member 9. Naturally bent state.
  • the backlight module 2 is bent toward the side away from the display module 1 to form the bending area 206 of the present application, so that a fingerprint is formed between the backlight module 2 and the display module 1.
  • the accommodating space 7 of the identification module 5 not only realizes fingerprint recognition under the screen, but also can satisfy the display effect of the display module 1, and this embodiment uses materials that have been mass-produced, such as brightness enhancement film 201, diffusion film 202, The light guide plate 203 and the reflective film 204 do not need to be specifically developed for each layered structure in the backlight module 2, thereby overcoming the problems of long material development period and high cost.
  • the backlight module 2 further includes: a backlight light source 205 and a flexible circuit board 6.
  • the backlight light source 205 is located at one end of the backlight module 2 close to the fingerprint recognition module 5, which is the display module 1. Provide visible light to enable the display module 1 to display images.
  • the flexible circuit board 6 is used to provide power to the backlight light source 205.
  • the flexible circuit board 6 is located on the side of the backlight light source 205 close to the display module 1 and is fixed on the first support portion 902 by the first light shielding glue 3.
  • the backlight light source 205 can use different light sources as the backlight light source 205 according to different needs. For example, light bulbs, etc., as long as the backlight light source 205 can emit visible light.
  • the backlight module 2 in this embodiment is used to diffusely reflect the light emitted by the point light source or the line light source into a surface light source, so that the display module 1 can display images.
  • At least one outlet slot 906 is opened at the end of the fixing member 9 close to the fingerprint identification module 5 to make the backlight module 2 and the fingerprint identification module 5 flexible.
  • the circuit board 6 goes out through the wire outlet slot 906.
  • the bending area 206 and the fingerprint identification module 5 There are gaps between the effective light path areas 503, where the effective light path area 503 is the largest area formed by the detection light of the fingerprint recognition module 5 and the detection light reflected by the finger and entering the fingerprint recognition module 5.
  • a gap is provided between the bending area 206 and the effective light path area 503 of the fingerprint identification module 5 to avoid the fingerprint identification module 5 from blocking the visible light emitted by the backlight module 2 and to ensure that the screen is below the screen.
  • the fingerprint identification can meet the display requirements of the display module 1 at the same time.
  • the gap between the bending area 206 and the effective optical path area 503 of the fingerprint identification module 5 is a safe distance that can avoid the fingerprint identification module 5 from blocking the visible light emitted by the backlight module 2.
  • the gap is greater than 0.3 mm, that is, when the gap between the bending area 206 and the effective optical path area 503 of the fingerprint recognition module 5 is greater than 0.3 mm, the fingerprint recognition pattern can be avoided.
  • Group 5 blocks the visible light emitted by the backlight module 2.
  • FIG. 5 is a schematic structural diagram of a fingerprint identification module provided in Embodiment 4 of the present application.
  • the fingerprint recognition module 5 includes a light path processing unit, which is used for the light path processing unit. In order to reduce the thickness of the fingerprint identification module 5, it is helpful to make the whole electronic device lighter and thinner.
  • the optical path processing unit includes an optical element 5011, a reflective element 5012, and a sensor 5013 for fingerprint recognition.
  • the reflective element 5012 is located below the sensor 5013, and the optical element 5011 is located on the reflective element 5012. It is located on the same side of the sensor 5013 and close to the fingerprint detection area 106 on the display module 1.
  • the optical element 5011 is used to converge the detection light passing through the display module 1 onto the reflective element 5012, and is reflected to the sensor by the reflective element 5012 5013, for fingerprint identification.
  • the optical element 5011 may include a macro lens with at least one spherical or aspherical lens, and other optical elements 5011 that can condense the detection light passing through the display module onto the reflective element 5012, that is, the optical element 5011 includes but not only Limited to macro lenses with at least one spherical or aspheric lens.
  • at least one lens may be formed of a resin material or a glass material, and is used to converge the detection light passing through the display module onto the reflective element 5012 and reflect it to the sensor 5013 via the reflective element 5012 for fingerprint identification.
  • the sensor 5013 used for fingerprint recognition may also be referred to as an optical sensor 5013, an image sensor 5013, an optical fingerprint sensor 5013, an optical sensor or a fingerprint detection sensor, etc., which may specifically include an optical imaging chip, or have a certain
  • the optical laminated optical imaging chip has a sensing array for receiving fingerprint detection light and performing photoelectric conversion of the fingerprint detection light.
  • the reflecting element 5012 may be a reflecting mirror capable of reflecting the detection light or other reflecting parts capable of reflecting the detection light to the sensor 5013. That is, the reflecting element 5012 in this embodiment includes but is not limited to the above-mentioned reflecting mirror.
  • the optical element 5011 is arranged on one side of the sensor 5013 and the reflective element 5012 is used to converge the optical element 5011 to The detection light of ⁇ is reflected to the sensor 5013 to realize fingerprint identification, and at the same time, the thickness (ie, the height) of the fingerprint identification module 5 can be reduced, which contributes to the lightness and thinness of the whole electronic device.
  • the thickness of the fingerprint identification module 5 in this embodiment is reduced by 3 mm-4 mm.
  • the fingerprint identification module 5 further includes a detection light source 502 for emitting detection light to the finger above the fingerprint detection area 106, and the detection light source 502 is located above the sensor 5013.
  • One or more detection light sources 502 may be provided in the fingerprint recognition module 5.
  • the detection light sources 502 may be point-shaped detection light sources, or the detection light sources 502 may be linear detection light sources formed by multiple detection light sources 502.
  • the detection light source 502 may be an infrared light source or other invisible light capable of realizing fingerprint recognition. Accordingly, the detection light emitted by the detection light source 502 is also infrared light.
  • the detection light source 502 may be an infrared light source such as an infrared lamp, an infrared vertical cavity surface emitting laser (VCSEL for short), and an infrared laser diode (Laser Diode).
  • the spectrum range of the detection light emitted by the detection light source 502 may be 780 nm-1100 nm. Preferably, it may be 850nm or 940nm or the like.
  • the fingerprint recognition module 5 further includes a first bracket 505 for fixing and accommodating the detection light source 502.
  • the first bracket 505 is provided with a first window structure 5051 above the detection light source 502.
  • the detection light source 502 emits detection light to the fingerprint detection area 106 through the first window opening structure 5051, and the detection light source 502 is fixed by the first bracket 505, and the leakage of the detection light emitted by the detection light source 502 can be avoided.
  • the detection light source 502 is welded or bonded in the first bracket 505, and there is a distance between the bottom of the display module 1 and the bottom of the display module 1.
  • the shape and size of the opening of the first window structure 5051 can satisfy that the detection light emitted by the detection light source 502 can basically be transmitted, so as to avoid the detection light emitted by the detection light source 502 from being unable to pass through the first support 505 normally. Affect fingerprint recognition.
  • the optical element 5011 and the sensor 5013 are attached to the bottom of the first bracket 505, wherein the optical element 5011 and the sensor 5013 are attached to the bottom of the first bracket 505.
  • Bonding methods include but are not limited to welding or bonding.
  • the fingerprint identification module 5 further includes a second bracket 506 for protecting the optical path processing unit, and the second bracket 506 is provided with an accommodating cavity for accommodating the optical path processing unit ( (Not labeled in the figure), wherein the second bracket 506 is provided with a second window opening structure (not labeled in the figure) at a position opposite to the optical element 5011, and the second window opening structure is used to pass through the display module 1
  • the detection light is transmitted to the sensor 5013 in order to realize fingerprint recognition.
  • the shape and size of the opening of the second window opening structure can satisfy that the detection light passing through the display module 1 is basically transparent, so as to avoid the detection light passing through the display module 1 that carries fingerprint information. Normally passing through the second bracket 506 affects the reception of the fingerprint image.
  • the size of the second window opening structure is based on the receiving light path of the optical element 5011.
  • the reflective element 5012 can be attached to a raised structure (not marked in the figure) on the sensor 5013, and the distance between the sensor 5013 and the reflective element 5012 can be adjusted by adjusting the height of the raised structure.
  • the reflective element 5012 can be arranged at the bottom of the second bracket 506, and the distance between the sensor 5013 and the reflective element 5012 can be adjusted by controlling the distance between the bottom of the second bracket 506 and the sensor 5013.
  • the embodiment of the present application provides a fingerprint recognition module 5 suitable for a liquid crystal display screen.
  • One end of the backlight module 2 of the liquid crystal display screen is provided with a bending area 206 and is connected to the display module 1.
  • An accommodating space 7 is formed between the fingerprint identification module 5, and the fingerprint detection area 106 of the fingerprint identification module 5 is at least partially located in the display area 104 of the liquid crystal display, and it includes an optical element 5011, a reflective element 5012 accommodated in the accommodating space 7 and a sensor for fingerprint recognition 5013, where the optical element 5011 is located on the same side of the reflective element 5012 and the sensor 5013 and close to the fingerprint detection area 106 of the liquid crystal display.
  • the optical element 5011 is used to form a finger above the liquid crystal display and pass through the display module 1.
  • the detection light is converged on the reflective element 5012, the reflective element 5012 is used to reflect the detection light to the sensor 5013, and the sensor 5013 is used to receive the detection light for fingerprint identification.
  • the fingerprint identification module 5 By bending one end of the backlight module 2 close to the fingerprint identification module 5 and forming an accommodation space 7 between it and the display module 1, the fingerprint identification module 5 is located in the accommodation space 7; the fingerprint identification module 5 is located in the accommodation space When it is within 7, the fingerprint identification module 5 is located above the backlight module 2 and below the display module 1.
  • the detection light emitted by the fingerprint identification module 5 and the fingerprint detection area 106 on the display module 1 The detection light reflected by the inner finger does not need to pass through the backlight module 2, which solves the problem of the detection light for fingerprint recognition when fingerprint recognition under the LCD optical screen is realized, and the detection light reflected by the finger in the fingerprint detection area 106 on the display module 1.
  • the detection light cannot penetrate the backlight module 2, so that the problem of the optical signal detection circuit of the fingerprint under the optical screen is formed. Further, without changing the backlight film material, the present embodiment realizes the LCD by changing the structure of the backlight module 2.
  • the fingerprint recognition under the optical screen can ensure the display effect of the display module 1 at the same time.
  • the size of the accommodating space 7 depends on the structural size of the fingerprint identification module 5, the size of the accommodating space 7 is not further limited in this embodiment. In this embodiment, it is only necessary to ensure that the bending area 206 and the display module The accommodating space 7 formed between the groups 1 can place the required fingerprint identification module 5 in the accommodating space 7, and can ensure the display effect of the display module 1 while achieving fingerprint recognition under the LCD optical screen.
  • the detection light has a different wavelength from the backlight provided by the backlight module of the liquid crystal display.
  • the detection light emitted by the pattern recognition module 5 is light with a wavelength range outside the wavelength of visible light.
  • the detection light includes but is not limited to infrared light. In this way, the different characteristics of visible light and infrared light in various film materials can be used to ensure that the backlight is uniform, but also to ensure that the light distortion that carries the fingerprint signal is small, and the fingerprint recognition accuracy is high.
  • the specific structure of the fingerprint identification module 5 in this embodiment can refer to the description of the fingerprint identification module 5 in the fourth embodiment above. In this embodiment, the structure of the fingerprint identification module 5 is no longer described. Elaborate further.
  • FIG. 6 is an exploded schematic diagram of a fingerprint identification system on a liquid crystal display screen provided in the sixth embodiment of the present application.
  • the gaps on both sides of the fingerprint identification module 5 are filled with the third bracket 8 to avoid obtrusiveness of the fingerprint identification module 5 when viewed from a large angle. Sense, and then enhance the display effect.
  • the third bracket 8 is distributed in the gaps on both sides of the fingerprint identification module 5 to further limit the fingerprint identification module 5.
  • the third bracket 8 restricts the fingerprint identification module 5 from being along with the backlight module 2 or the display module.
  • Group 1 moves in a direction parallel to the width.
  • the third bracket 8 can be fixed on both sides of the fingerprint identification module 5 by bonding or clamping, and is used to fill the gaps on both sides of the fingerprint identification module 5 in the accommodating space 7 to avoid fingerprint identification when viewed from a large angle.
  • the awkwardness of the module 5 further enhances the display effect.
  • the third bracket 8 is provided in the gap between the two sides of the fingerprint identification module 5, so when the user observes at a large angle, the third bracket 8 and the fingerprint identification module 5 are seen.
  • the wide-angle observation refers to viewing from the end of the display module 1 away from the fingerprint recognition module 5 toward the end of the display module 1 close to the fingerprint recognition module 5, that is, from The top of the display module 1 is viewed toward the bottom of the display module 1.
  • the structure of the third bracket 8 is a structure adapted to the structure of the first bending portion 907 of the fixing member 9.
  • the third bracket 8 is a structure corresponding to the first bending portion of the fixing member 9. L-shaped structure adapted to the 907 structure.
  • the third bracket 8 can be made of black plastic material, or the third bracket 8 can also be made of black metal material.
  • the structure and structure of the third bracket 8 The material is not further limited.
  • FIG. 7 is a schematic structural diagram of a display module provided in the seventh embodiment of the present application
  • FIG. 8 is a schematic structural diagram of another display module provided in the seventh embodiment of the present application
  • FIG. 9 is a schematic diagram of another display module provided in the seventh embodiment of the present application.
  • an embodiment of the present application provides an electronic device, and the electronic device includes the liquid crystal display fingerprint identification system in any of the foregoing embodiments.
  • the electronic device includes the under-screen optical fingerprint system in any of the above embodiments, and the electronic device may specifically be a liquid crystal display device, electronic paper, mobile phone, tablet computer, television, notebook computer, digital photo frame, navigator, fingerprint lock, etc. Electronic products or components.
  • the electronic device is provided with a battery accommodating cavity 10.
  • the distance between the bending point and the end of the backlight module 2 close to the fingerprint identification module 5 is less than 40mm to ensure that the fingerprint identification module 5 can be placed in the accommodating space 7 while avoiding the battery accommodating cavity 10. , To avoid the influence of the bending of the backlight module 2 on the battery accommodating cavity 10, so as to meet the requirement of the electronic device for the large capacity of the battery.
  • the bending area 206 satisfies the need to completely place the fingerprint identification module 5 in the formed receiving space 7 and realize the under-screen optical fingerprint.
  • the bending angle of the bending area 206 is less than 7°. As shown in FIG. 1, the bending angle is the angle between the bending area 206 of the backlight module 2 and the extension of the flat area 207 facing the fingerprint identification module 5.
  • the fingerprint identification module 5 is assembled under the non-display area 105 of the display module 1 to meet the high screen-to-body ratio of the electronic device.
  • the display module 1 includes a display cover 101 and a liquid crystal panel 102 located under the display cover 101.
  • the display cover 101 in this embodiment is screen-printed with infrared ink 107 on the side of the display cover 101 close to the backlight module 2.
  • the infrared ink 107 is in the orthographic projection area on the display cover 101 It is the non-display area 105 of the display module 1, and correspondingly, the area on the display module 1 outside the non-display area 105 is the display area 104 on the display module 1.
  • the fingerprint detection area 106 on the display module 1 is at least partially located in the display area 104, that is, the fingerprint detection area 106 is partially located in the display area 104, or The fingerprint detection area 106 is completely located in the display area 104.
  • the position of the fingerprint detection area 106 is not further limited. In this embodiment, it is only necessary to ensure that the setting of the fingerprint detection area 106 can be realized Fingerprint recognition under the screen is enough.
  • the detection light emitted by the fingerprint recognition module needs to pass through the display module 1, and the detection light reflected by the finger that carries fingerprint information needs to be transmitted to the fingerprint recognition module 5 through the display module 1.
  • Improve the transmittance of the detection light In this embodiment, the range of the infrared transparent ink area 108 on the display cover 101 corresponding to the effective optical path area 503 of the fingerprint recognition module 5 needs to be larger than that of the fingerprint recognition module 5
  • the light-emitting area 504 of the light source reduces the loss of the detection light in the optical path transmission and improves the accuracy of fingerprint recognition.
  • the infrared-transmitting ink area 108 is the area formed by the infrared-transmitting ink on the display cover 102.
  • the display cover 101 includes but is not limited to a glass cover.
  • the infrared transmission of the position corresponding to the fingerprint identification module 5 and the third bracket 8 on the display cover 101 The range of the ink area 108 needs to be larger than the orthographic projection area of the fingerprint identification module 5 and the third bracket 8 on the display cover 101.
  • the distance between the fingerprint identification module 5 and the third bracket 8 in the orthographic projection area on the display cover 101 is greater than the distance between the edge of the infrared transparent ink area 108 on the display cover 101 near the end of the fingerprint identification module 5 0.3mm gap distance.
  • 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

一种液晶显示屏指纹识别系统、电子装置及指纹识别模组（5），显示装置包括显示模组（1）、背光模组（2）和指纹识别模组（5），其中的背光模组（2）的靠近指纹识别模组（5）的一端设有弯折区域（206），弯折区域（206）与显示模组（1）之间形成了用于容纳指纹识别模组（5）的容纳空间（7），指纹识别模组（5）位于容纳空间（7）中，以实现LCD光学屏下指纹识别同时能够保证显示模组（1）的显示效果。

Description

液晶显示屏指纹识别系统、电子装置及指纹识别模组 技术领域
本申请涉及生物识别技术领域，尤其涉及一种液晶显示屏指纹识别系统、电子装置及指纹识别模组。
背景技术
目前已量产的屏下光学指纹识别手机中，目前只能搭配有机发光二极管显示屏幕实现。有机发光二极管(OrganicLight-Emitting Diode，简称OLED)属于一种电流型的有机发光器件，采用OLED屏幕的手机利用OLED屏幕像素自发光作为光源，光线照射到手指上经过手指反射，透过手机屏幕和光学镜头，被屏下的传感器接收，实现指纹图像采集和指纹识别。
液晶显示器(Liquid Crystal Display，简称LCD)具有机身薄、省电、无辐射等众多优点，被广泛的应用于电视、电脑、手机等电子产品中。由于手指反射/透射回来的光线无法穿透背光模组，无法形成光学屏下指纹的光信号探测回路，基于LCD屏幕的光学指纹识别方案目前暂未实现量产，需要通过改进背光模组的背光膜材，来减少对光路处理单元的干扰，以使穿过LCD屏幕后的指纹图像满足指纹识别的要求。背光模组的背光膜材包括增亮膜、扩散片、导光板、反射片。每一层光学膜材都会对指纹图像产生干扰，因此需针对光学指纹识别开发特定的光学膜材。
然而，目前现有的背光膜材无法同时满足指纹识别及屏幕显示的要求。所以LCD光学屏下指纹存在较大的技术难题。
发明内容
本申请提供一种液晶显示屏指纹识别系统、电子装置及指纹识别模组，以解决现有的背光膜材无法同时满足指纹识别及屏幕显示的要求，以致无法实现LCD光学屏下指纹识别的问题。
本申请的第一方面提供一种液晶显示屏指纹识别系统，包括显示模组、 背光模组和指纹识别模组，所述背光模组的靠近所述指纹识别模组的一端设有弯折区域，所述弯折区域与所述显示模组之间形成了用于容纳所述指纹识别模组的容纳空间，所述指纹识别模组位于所述容纳空间中。
在本申请的具体实施方式中，所述背光模组朝着背离所述显示模组的一侧弯折，以形成所述弯折区域。
在本申请的具体实施方式中，所述弯折区域的宽度和所述背光模组的宽度相等。
在本申请的具体实施方式中，所述弯折区域的宽度小于所述背光模组的宽度。
在本申请的具体实施方式中，所述弯折区域的弯折点与所述背光模组靠近所述指纹识别模组一端端部的距离小于40mm。
在本申请的具体实施方式中，所述弯折区域的弯折角度小于7°。
在本申请的具体实施方式中，所述背光模组的背离所述指纹识别模组的一端为平直区域，所述平直区域与所述弯折区域圆滑连接。
在本申请的具体实施方式中，所述背光模组固定在固定件上，所述固定件包括：呈框状的固定件本体、以及用于固定所述背光模组的第一支撑部，所述第一支撑部设在所述固定件本体的内侧壁上，以将所述背光模组固定在所述固定件本体内。
在本申请的具体实施方式中，所述固定件还包括：用于固定所述弯折区域的第二支撑部，所述弯折区域通过所述第二支撑部固设在所述显示模组上。
在本申请的具体实施方式中，所述第二支撑部位于所述固定件本体的靠近所述弯折区域一端的侧壁上。
在本申请的具体实施方式中，所述第二支撑部高于所述第一支撑部，且所述第一支撑部靠近所述背光模组的一侧边缘外露于所述第二支撑部。
在本申请的具体实施方式中，所述第一支撑部和所述第二支撑部均为台阶。
在本申请的具体实施方式中，所述背光模组通过第一遮光胶粘结在所述第一支撑部上，所述弯折区域通过第二遮光胶粘结在所述显示模组靠近所述背光模组的一侧。
在本申请的具体实施方式中，所述第一遮光胶和所述第二遮光胶均与所述显示模组的显示区域之间设有安全距离，其中，所述安全距离大于0.2mm。
在本申请的具体实施方式中，所述固定件为铁框或者胶铁一体框。
在本申请的具体实施方式中，所述背光模组包括：依次堆叠的增亮膜、扩散膜、导光板和反射膜，其中，所述增亮膜靠近所述显示模组一侧，所述反射膜背离所述显示模组的一侧设置。
在本申请的具体实施方式中，所述导光板的靠近所述指纹识别模组的一端设有与所述弯折区域结构相适配的第二弯折部。
在本申请的具体实施方式中，所述导光板对所述背光模组发出的可见光的亮度的均匀度均大于90％。
在本申请的具体实施方式中，所述固定件靠近所述指纹识别模组的一端端部开设有至少一个出线槽，以使所述背光模组和所述指纹识别模组的柔性电路板通过所述出线槽出线。
在本申请的具体实施方式中，所述弯折区域与所述指纹识别模组的有效光路区之间存在间隙，其中，所述有效光路区为所述指纹识别模组的探测光、以及经手指反射并进入所述指纹识别模组的所述探测光所形成的最大区域。
在本申请的具体实施方式中，所述间隙大于0.3mm。
在本申请的具体实施方式中，所述指纹识别模组内包括：光路处理单元，所述光路处理单元用于减小所述指纹识别模组的厚度。
在本申请的具体实施方式中，所述光路处理单元包括：光学元件、反射元件，以及用于指纹识别的传感器，其中，所述反射元件位于所述传感器的下方，所述光学元件位于所述反射元件和所述传感器的同一侧且靠近所述显示模组上的指纹检测区域设置，所述光学元件用于将穿过所述显示模组的所述探测光汇聚到所述反射元件上，并经所述反射元件反射至所述传感器，以进行指纹识别。
在本申请的具体实施方式中，所述指纹识别模组还包括用于向所述指纹检测区域上方的手指上发射所述探测光的检测光源，所述检测光源位于所述传感器的上方。
在本申请的具体实施方式中，所述指纹识别模组还包括用于固定和容纳所述检测光源的第一支架，所述第一支架在与所述检测光源的上方设有第一开窗结构，所述检测光源通过所述第一开窗结构向所述指纹检测区域发射所述探测光。
在本申请的具体实施方式中，所述光学元件和所述传感器与所述第一支架的底部贴合。
在本申请的具体实施方式中，所述指纹识别模组还包括用于保护所述光路处理单元的第二支架，所述第二支架内设有用于容纳所述光路处理单元的容纳空间，其中，所述第二支架在与所述光学元件相对位置处设有第二开窗结构，所述第二开窗结构用于使穿过所述显示模组的所述探测光传输至所述传感器。
在本申请的具体实施方式中，所述反射元件和所述传感器之间存在间距，以便所述传感器接收经所述反射元件反射后的携带有指纹信息的所述探测光。
在本申请的具体实施方式中，所述反射元件贴合在所述传感器上的凸起结构上，或者所述反射元件设在第二支架的底部。
在本申请的具体实施方式中，所述指纹识别模组两侧的间隙填充有第三支架。
本申请的第二方面提供一种电子装置，所述电子装置包括上述任一所述的液晶显示屏指纹识别系统。
在本申请的具体实施方式中，所述电子装置内设有电池容纳腔，所述弯折区域的弯折点与所述电池容纳腔之间存在间距。
在本申请的具体实施方式中，所述弯折点与所述背光模组靠近所述指纹识别模组一端端部的距离小于40mm。
在本申请的具体实施方式中，所述弯折区域的弯折角度小于7°。
本申请的第三方面提供一种适用于液晶显示屏的指纹识别模组，所述液晶显示屏的背光模组一端设有弯折区域并与显示模组之间形成容纳空间，所述指纹识别模组的指纹检测区域至少部分位于所述液晶显示屏的显示区域，且其包括容纳于所述容纳空间的光学元件、反射元件以及用于指纹识别的传感器，其中，所述光学元件位于所述反射元件和所述传感器的 同一侧且靠近所述液晶显示屏的指纹检测区域，所述光学元件用于将在所述液晶显示屏上方的手指形成且穿过所述显示模组的探测光汇聚到所述反射元件上，所述反射元件用于将所述探测光反射至所述传感器，所述传感器用于接收所述探测光以进行指纹识别。
在本申请的具体实施方式中，所述指纹识别模组还包括用于向所述指纹检测区域上方的手指上发射所述探测光的检测光源，所述检测光源位于所述传感器的上方，且所述探测光与所述液晶显示屏的背光模组提供的背光波长不同。
在本申请的具体实施方式中，所述指纹识别模组还包括用于固定和容纳所述检测光源的第一支架，所述第一支架在与所述检测光源的上方设有第一开窗结构，所述检测光源通过所述第一开窗结构向所述指纹检测区域发射所述探测光。
在本申请的具体实施方式中，所述光学元件和所述指纹识别传感器与所述第一支架的底部贴合。
在本申请的具体实施方式中，所述指纹识别模组还包括用于保护所述光路处理单元的第二支架，所述第二支架内设有用于容纳所述光路处理单元的容纳空间，其中，所述第二支架在与所述光学元件相对位置处设有第二开窗结构，所述第二开窗结构用于使穿过所述显示模组的所述探测光传输至所述传感器。
在本申请的具体实施方式中，所述反射元件和所述传感器之间存在间距，以便所述传感器接收经所述反射元件反射后的携带有指纹信息的所述探测光，所述反射元件贴合在所述传感器上的凸起结构上，或者所述反射元件设在第二支架的底部。
本申请提供一种液晶显示屏指纹识别系统、电子装置及指纹识别模组，包括显示模组、背光模组和指纹识别模组，背光模组的靠近指纹识别模组的一端设有弯折区域，弯折区域与显示模组之间形成了指纹识别模组容纳空间，以使指纹识别模组位于容纳空间内；通过将背光模组靠近指纹识别模组的一端弯折且与显示模组之间形成了容纳空间，以使指纹识别模组位于容纳空间；指纹识别模组位于容纳空间内时，指纹识别模组位于背光模组之上，当进行指纹识别时，指纹识别模组的探测光、以及经显示模组上手 指反射的探测光均无需穿过背光模组，避免了对指纹识别图像的影响。因此，本申请通过对背光模组的结构进行改变，在实现LCD光学屏下指纹识别同时能够保证显示模组的显示效果，解决了现有的背光膜材无法同时满足指纹识别及显示模组的显示的要求，以致无法实现LCD光学屏下指纹识别的问题。
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为本申请实施例一提供的一种液晶显示屏指纹识别系统的结构示意图；
图2为本申请实施例一提供的固定件的结构示意图；
图3为图2中A部的局部放大示意图；
图4是本申请实施例二提供的一种背光模组的结构示意图；
图5是本申请实施例四提供的一种指纹识别模组的结构示意图；
图6是本申请实施例六提供的一种液晶显示屏指纹识别系统的分解示意图；
图7是本申请实施例七提供的一种显示模组的结构示意图；
图8是本申请实施例七提供的另一种显示模组的结构示意图；
图9是本申请实施例七提供的又一种显示模组的局部示意图。
附图标记说明：
显示模组-1；显示盖板-101；液晶面板-102；下偏光片-103；显示区域-104；非显示区域-105；指纹检测区域-106；透红外油墨-107；透红外油墨区域-108；背光模组-2；增亮膜-201；扩散膜-202；导光板-203；第二弯折部-2031；反射膜-204；背光光源-205；弯折区域-206；平直区域-207；第一遮光胶-3；第二遮光胶-4；指纹识别模组-5；光路处理单元-501；光学元件-5011；反射元件-5012；传感器-5013；检测光源-502；有效光路区-503；检测光源发光区域-504；第一支架-505；第一开窗结构-5051；第二支架-506；柔性电路板-6；容纳空间-7； 第三支架-8；固定件-9；固定件本体-901；第一支撑部-902；第二支撑部-903；铁框-904；胶框-905；出线槽-906；第一弯折部-907；电池容纳腔-10。
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。
LCD屏幕具有机身薄、省电、无辐射等众多优点，被广泛的应用于电视、电脑、手机等电子产品中。由于手指反射/透射回来的光线无法穿透背光模组，无法形成光学屏下指纹的光信号探测回路，基于LCD屏幕的光学指纹识别方案目前暂未实现量产，需要通过改进背光模组的背光膜材，来减少对光路处理单元的干扰，以使穿过LCD屏幕后的指纹图像满足指纹识别的要求。背光模组的背光膜材包括增亮膜、扩散片、导光板、反射片。每一层光学膜材都会对指纹图像产生干扰，因此，需针对光学指纹识别开发特定的光学膜材。然而，目前现有的背光膜材无法同时满足指纹成像及屏幕显示的要求，以致LCD光学屏下指纹存在较大的技术难题。
为此，本申请提供一种液晶显示屏指纹识别系统、电子装置及指纹识别模组，以解决现有的背光膜材无法同时满足指纹成像及屏幕显示的要求，以致无法实现LCD光学屏下指纹识别的问题。
实施例一
图1为本申请实施例一提供的一种液晶显示屏指纹识别系统的结构示意图，图2为本申请实施例一提供的固定件的结构示意图，图3为图2中A部的局部放大示意图。
如图1至图3所示，本申请实施例提供一种液晶显示屏指纹识别系统，包 括显示模组1、背光模组2和指纹识别模组5，背光模组2的靠近指纹识别模组5的一端设有弯折区域206，弯折区域206与显示模组1之间形成了用于容纳指纹识别模组5的容纳空间7，指纹识别模组5位于容纳空间7中。
其中，本实施例中，如图1至图3所示，通过将背光模组2靠近指纹识别模组5的一端弯折且与显示模组1之间形成了容纳空间7，以使指纹识别模组5位于容纳空间7；指纹识别模组5位于容纳空间7内时，指纹识别模组5位于背光模组2之上显示模组1之下，当进行指纹识别时，指纹识别模组5发出的探测光、以及经显示模组1上指纹检测区域106内手指反射的探测光均无需穿过背光模组2，从而解决了为实现LCD光学屏下指纹识别时，进行指纹识别的探测光、以及经显示模组1上指纹检测区域106内手指反射的探测光无法穿透背光模组2，以致形成光学屏下指纹的光信号探测回路的问题，进而在不改变背光膜材的前提下，本实施例通过改变背光模组2的结构在实现了LCD光学屏下指纹识别的同时能够保证显示模组1的显示效果。
应理解的是，本实施例中，当指纹识别模组5位于容纳空间7内时，指纹识别模组5位于背光模组2之上显示模组1之下，因此，当需要对指纹进行识别时，指纹识别模组5发出的探测光可透过显示模组1直接照射到指纹检测区域106内的手指上并被手指反射，经手指反射后携带有指纹信息的探测光透过显示模组1将指纹信息传输至指纹识别模组5进行数据处理，进而来实现指纹识别。由于当指纹识别模组5位于容纳空间7内时，指纹识别模组5位于背光模组2之上显示模组1之下，因此，探测光、以及经手指反射后携带有指纹信息的探测光均无需穿透背光模组2，不仅形成光学屏下指纹的光信号探测回路，实现了屏下光学指纹的识别，而且能够避免穿透背光模组2时对光路处理单元501的干扰，其中，光路处理单元501包括探测光和经手指反射的探测光，避免了对指纹识别图像的影响，提高了指纹识别的准确度。
本实施例中，指纹识别模组5发出的探测光为波长范围在可见光波长之外的光，其中，探测光包括但不仅限于红外光。这样利用可见光和红外光在各类膜材中不同的特性，可以既保证背光均匀化，又保证携带有指纹信号的光线失真小，确保指纹识别准确性高。
由于容纳空间7的大小取决于指纹识别模组5的结构尺寸，因此，本实施例中对于容纳空间7的大小并不做进一步限定，本实施例中，只需保证弯折区域206与显示模组1之间形成的容纳空间7，能够将需满足指纹识别模组5放置在容纳空间7内，且在实现了LCD光学屏下指纹识别的同时能够保证显示模组1的显示效果即可。
其中，本实施例中，如图1和图2所示，背光模组2朝着背离显示模组1的一侧弯折，以形成弯折区域206，其中，在满足能够将指纹识别模组5完全放置在形成的容纳空间7内且实现屏下光学指纹识别的前提下，为了尽可能的满足背光模组2发出的背光光源205在显示模组1上的显示效果，弯折区域206的弯折角度越小越好。需要说明的是，显示效果包括但不仅限于显示亮度的均匀度。
在一种可能实现的方式中，如图1和图2所示，弯折区域206的宽度和背光模组2的宽度相等，也就是说，弯折区域206为背光模组2靠近指纹识别模组5的一端整体朝着背离显示模组1的一侧弯折，以形成弯折区域206，弯折区域206与显示模组1之间形成了用于容纳指纹识别模组5的容纳空间7。
在另一种可能实现的方式中，弯折区域206的宽度小于背光模组2的宽度，也就是说，弯折区域206为背光模组2靠近指纹识别模组5的一端局部朝着背离显示模组1的一侧弯折，以形成弯折区域206，弯折区域206与显示模组1之间形成了用于容纳指纹识别模组5的容纳空间7。其中，本实施例中，背光模组2靠近指纹识别模组5的一端发生局部弯折的区域可以位于背光模组2的中心位置，也可以位于背光模组2的偏心位置，其中，偏心位置可以理解为发生局部弯折的区域偏离了背光模组2的中心位置，在本实施例中，对于背光模组2上发生局部弯折的区域并不做进一步限定，本实施例，只需要保证，指纹识别模组5位于发生局部弯折的区域与显示模组1之间形成的容纳空间7内时，在实现了LCD光学屏下指纹识别的同时，能够保证显示模组1的显示效果即可。
需要说明的是，本实施例中，指纹检测区域106可以位于容纳空间7的中心区域，也可以偏离容纳空间7的中心区域设置，在本实施例中并不做进一步限定。可以理解的是，当指纹识别模组5的位置发生变化，相应 的，显示模组1上的指纹检测区域106的位置也会发生相应的变化，本实施例中，只需保证，指纹检测区域106和指纹识别模组5的相对设置，能够实现屏下指纹识别即可。
其中，本实施例中，背光模组2和指纹识别模组5均固定在显示模组1的下偏光片103朝向背光模组2的一侧。
具体的，本实施例中，显示模组1包括显示盖板101、以及位于显示盖板101之下的液晶面板102，其中，下偏光片103为液晶面板102的一部分，位于液晶面板102的底层，也就是说，下偏光片103位于液晶面板102上靠近背光模组2一侧。由于液晶面案为现有技术，因此，在本实施例中，对于液晶面板102的结构不再做进一步阐述。
如图1所示，为了避开安装有本实施例中显示装置的电子装置内部的电池容纳腔10，弯折区域206的弯折点与背光模组2靠近指纹识别模组5一端端部的距离小于40mm，以确保能够将指纹识别模组5放置在容纳空间7内的同时，能够避开电池容纳腔10，避免背光模组2的弯折对电池容纳腔10造成的影响，以满足电子装置对电池大容量的需求。
需要说明的是，结合现有技术中电子装置以及电池容纳腔10的大小关系，当弯折点与背光模组2靠近指纹识别模组5一端端部的距离小于40mm时，也就意味着，弯折点以及弯折区域206均避开了电子装置的电池容纳腔10。
需要说明的是，现有技术中，电池容纳腔10的靠近指纹识别模组5的一端的边缘距离背光模组2靠近指纹识别模组5的一端的端部的距离大于或等于40mm，因此，当本实施例中弯折点与背光模组2靠近指纹识别模组5一端端部的距离小于40mm时，能够使弯折点以及弯折区域206均避开了电子装置的电池容纳腔10，以满足电子装置对电池大容量的需求。
如图1所示，为了尽可能的降低背光模组2的弯折区域206导致的电子装置厚度增大，弯折区域206在满足能够将指纹识别模组5完全放置在形成的容纳空间7内且实现屏下光学指纹识别的前提下，为了尽可能的满足背光模组2发出的背光光源205在显示模组1上的显示效果，弯折区域206的弯折角度越小越好。本实施例中，优选的，弯折区域206的弯折角度小于7°。
如图1所示，为了提升显示模组1的显示效果，背光模组2的背离指纹识别模组5的一端为平直区域207，平直区域207与弯折区域206圆滑连接。
其中，本实施例中，如图1所示，平直区域207与弯折而区域的圆滑连接可以采用圆角过渡连接，也可以采用弧形结构进行圆滑连接，即本实施例中平直区域207与弯折而区域的圆滑连接包括但不仅限于采用圆角过渡连接。其中，本实施例中，优选的，平直区域207与弯折而区域的圆滑连接采用半径大于5mm的圆角过渡连接。
需要说明的是，本实施例中，如图1所示，弯折角度为背光模组2的弯折区域206与平直区域207朝着指纹识别模组5的一端的延长段之间的夹角。
如图1至图3所示，为了使背光模组2靠近指纹识别模组5的一端形成本申请中的弯折区域206，背光模组2固定在固定件9上，并且通过固定件9将背光模组2固定在显示模组1之下，对背光模组2和固定件9进行固定。
需要说明的是，本实施例中，如图1至图3所示，固定件9靠近指纹识别模组5的一端朝着背离显示模组1的一侧弯折，形成第一弯折部907，固定件9远离指纹识别模组5的一端为水平部，通过将背光模组2固定在固定件9内，以使背光模组2靠近指纹识别模组5的一端形成本申请中的弯折区域206。需要说明的是，本实施例中，第一弯折部907的结构与弯折区域206的结构相适配，具体的，第一弯折部907的弯折点以及弯折角度均与弯折区域206的弯折点以及弯折角度相同，具体参见对于背光模组2的弯折点以及弯折角度的描述，在本实施例中的，对于固定件9的弯折点和弯折角度不再多进一步赘述。
具体的，本实施例中，如图1至图3所示，固定件9包括：呈框状的固定件本体901、以及用于固定背光模组2的第一支撑部902，第一支撑部902设在固定件本体901的内侧壁上，以将背光模组2固定在固定件本体901内。
示例性的，如图1至图3所示，呈框状的固定件本体901也就是说固定件9呈框状，即固定件本体901为框架结构，第一支撑部902设在框架 结构的内侧壁上，以将背光模组2固定在框架结构内。本实施例中，该固定件本体901的底部为实心的板状结构，且该板状结构位于背光模组2的底部，以使背光模组2不透光；或者，固定件本体901的底部为空心结构，且背光模组2固定在该固定件本体901的框架结构内。
进一步的，如图1至图3所示，固定件9还包括：用于固定弯折区域206的第二支撑部903，弯折区域206通过第二支撑部903固设在显示模组1上。
其中，本实施例中，如图1至图3所示，第二支撑部903位于固定件本体901的靠近弯折区域206一端的侧壁上，也就是说第二支撑部903位于固定件本体901框架结构靠近弯折区域206一端的侧壁上，其中，第二支撑部903高于固定件本体901的框架结构，以便将指纹识别模组5设在在容纳空间7内的同时，且弯折区域206通过第二支撑部903固设在显示模组1上。
其中，本实施例中，如图1至图3所示，第二支撑部903高于第一支撑部902，且第一支撑部902靠近背光模组2的一侧边缘外露于第二支撑部903，以使弯折区域206通过第二支撑部903固设在显示模组1上，背光模组2通过第一支撑部902固定在框架结构内，通过固定件9使显示模组1与背光模组2之间形成良好的密封，以避免异物污染影响指纹识别时的成像质量及显示模组1的显示效果。
如图1至图3所示，为了对背光模组2和弯折区域206起到更好的固定作用，第一支撑部902和第二支撑部903均为台阶，以增大第一支撑部902与显示模组1、以及第二支撑部903与显示模组1和背光模组2的接触面积，以增强对背光模组2和弯折区域206的固定效果。
应理解的是，如图3所示，台阶为现有技术中顶部为平面的凸起结构，在本实施例中，对于台阶的具体描述不再做进一步赘述。
示例性的，本实施例中，如图3所示，背光模组2通过第一遮光胶3粘结在第一支撑部902上，弯折区域206通过第二遮光胶4粘结在显示模组1靠近背光模组2的一侧。
当背光模组2固定在固定件本体901内的第一支撑部902时，背光模组2靠近显示模组1的一面与第一支撑部902的表面平齐，或者背光模组 2靠近显示模组1的一面高于第一支撑部902的表面，通过第一遮光胶3至少部分贴覆在第一支撑部902的表面，将背光模组2靠近显示模组1的一面、以及第一支撑部902的表面进行固定，能够将背光模组2进一步的固定在固定件本体901内。由于第一遮光胶3至少部分固定在背光模组2与第一支撑部902的表面的连接处，因此，第一遮光胶3的形状为形如“口”字型的结构；相应的，由于第二支撑部903位于固定件本体901的靠近弯折区域206一端的侧壁上，且第二支撑部903第二遮光胶4粘结在显示模组1上，因此，第二遮光胶4的形状与第二支撑部903的结构相适配，优选的，第二遮光胶4为形如“U”字型的结构。
需要说明的是，第一遮光胶3和第二遮光胶4为现有技术中的同一种遮光胶，本实施例中的第一和第二仅是对不同位置的遮光胶进行区分，本实施例中不再对遮光胶的成分做进一步赘述。
具体的，为了避免第一遮光胶3和第二遮光胶4的设置对显示模组1的显示区域104造成影响，第一遮光胶3和第二遮光胶4均与显示模组1的显示区域104之间设有安全距离，其中，安全距离大于0.2mm。
其中，本实施例中，如图1和图3所示，固定件9为铁框或者胶铁一体框，其中，本实施例中，胶铁一体框为现有技术中一种常用的框体固定件9，其通过将胶框905注塑在铁框904的内侧壁，形成了一体化结构，以提升固定在其上的产品的强度，在本实施例中，不再对胶铁一体框的结构作进一步赘述。
本申请实施例中，通过将背光模组靠近指纹识别模组的一端弯折且与显示模组之间形成了容纳空间，以使指纹识别模组位于容纳空间；指纹识别模组位于容纳空间内时，指纹识别模组位于背光模组之上，当进行指纹识别时，指纹识别模组发出的探测光、以及经显示模组上手指反射的探测光均无需穿过背光模组，从而解决了现有的背光膜材无法同时满足指纹成像及屏幕显示的要求，以致无法实现LCD光学屏下指纹识别的问题。
实施例二
图4是本申请实施例二提供的一种背光模组的结构示意图。
进一步的，在上述实施例一的基础上，如图4所示，本实施例中背光模 组2包括依次堆叠的增亮膜201、扩散膜202、导光板203和反射膜204，其中，增亮膜201靠近显示模组1一侧，反射膜204背离显示模组1的一侧设置。
需要说明的是，本实施例中，反射膜204用于将光源反射进入导光板203内，以提高光源的利用率。导光板203用于引导光源的散射方向，用来提高显示模组1的亮度，并确保显示模组1亮度的均匀性。扩散膜202用于将导光板203射出的不均匀地光源转换成向各个角度发散的均匀的光源。增亮膜201设置在扩散膜202和显示模组1之间，用于改善光源的角分布，可以将从扩散膜202射出的均匀地向各个角度发散的光源汇聚到轴向角度上，在不增加出射总的光通量的情况下提高轴向亮度。
示例性的，增亮膜201可以为单层棱镜膜，双层棱镜膜或者无棱镜结构的增亮膜201，在本实施例中，对于增亮膜201的结构并不做进一步限定。
进一步的，如图4所示，导光板203上设有导光颗粒，导光颗粒在导光板203上形成了导光点，当可见光射到各个导光点时，光线会往各个角度扩散，然后破坏反射条件由导光板203正面射出，照亮显示模组1，确保背光模组2能够正常提供背光。
如图4所示，由于导光板203相比其他背光膜材具有较大的厚度，为了使导光板203在固定件9内与固定件9的第一弯折部907和水平部贴合，以形成背光模组2的弯折区域206，导光板203的靠近指纹识别模组5的一端设有与弯折区域206结构相适配的第二弯折部2031，其中，第二弯折部2031的弯折点以及弯折角度与第一弯折部907的弯折点以及弯折角度相同，在本实施例中，不再对第二弯折部2031的弯折点以及弯折角度作进一步赘述。
其中，本实施例中，如图4所示，导光板203对背光模组2发出的可见光亮度的均匀度均大于90％。
具体的，本实施例中，可以通过对第二弯折部2031上的导光颗粒的粒径以及导光颗粒在第二弯折部2031上的疏密程度进行调节，以使导光板203对背光模组2发出的可见光的亮度的均匀度均大于90％，亦或者，本实施例中，还可通过从现有技术中的导光板203中进行筛选，以确保弯折后形成的第二弯折部2031后的导光板203对背光模组2发出的可见光 亮度的均匀度均大于90％。
示例性的，导光颗粒可以为现有技术中任一种能够实现改变光线且使光线向各个角度扩散的微小颗粒，如塑料颗粒或高反射材料等，在本实施例中，对于具体采用何种导光颗粒并不做进一步限定。
其中，本实施例中，增亮膜201、扩散膜202和反射膜204固定在固定件9内，通过固定件9以使增亮膜201、扩散膜202和反射膜204在固定件9内呈自然弯折状态。
需要说明的是，本实施例通过将背光模组2朝着背离显示模组1的一侧弯折形成本申请的弯折区域206，以使背光模组2和显示模组1之间形成指纹识别模组5的容纳空间7，不仅实现屏下指纹识别的同时，能够满足显示模组1的显示效果，而且本实施例利用目前已量产的材料，如增亮膜201、扩散膜202、导光板203和反射膜204，无需针对背光模组2内的每个层状结构进行特定的开发，从而克服了材料开发周期长、成本高的问题。
进一步的，如图4所示，背光模组2还包括：背光光源205和柔性电路板6，背光光源205位于背光模组2靠近指纹识别模组5的一端端部，其为显示模组1提供可见光，以使显示模组1显示画面。其中，柔性电路板6用于为背光光源205提供电能，柔性电路板6位于背光光源205靠近显示模组1的一侧，并通过第一遮光胶3固定在第一支撑部902上。
需要说明的是，根据需要的不同，背光光源205可以采用不同的光源作为背光光源205。例如，灯泡等，只要保证背光光源205能够发出可见光即可。
需要说明的是，本实施例中背光模组2用于将点光源或线光源发出的光通过漫反射使之成为面光源，以使显示模组1显示画面。
为了便于柔性电路板6的出线，如图3所示，固定件9靠近指纹识别模组5的一端端部开设有至少一个出线槽906，以使背光模组2和指纹识别模组5的柔性电路板6通过出线槽906出线。
实施例三
进一步的，在上述实施例一和实施例二的基础上，为了避免指纹识别模 组5对背光模组2的可见光的遮挡，如图1所示，弯折区域206与指纹识别模组5的有效光路区503之间存在间隙，其中，有效光路区503为指纹识别模组5的探测光、以及经手指反射并进入指纹识别模组5的探测光所形成的最大区域。
需要说明的是，本实施例中通过在弯折区域206和指纹识别模组5的有效光路区503设置间隙，以避免指纹识别模组5对背光模组2发出的可见光的遮挡，确保屏下指纹识别的同时，能够满足显示模组1的显示要求。其中，弯折区域206与指纹识别模组5的有效光路区503之间的间隙为能够避免指纹识别模组5对背光模组2发出的可见光的遮挡的安全距离。
其中，本实施例中，优选的，间隙大于0.3mm，也就是说，当弯折区域206与指纹识别模组5的有效光路区503之间的间隙大于0.3mm时，就能够避免指纹识别模组5对背光模组2发出的可见光的遮挡。
实施例四
图5是本申请实施例四提供的一种指纹识别模组的结构示意图。
进一步的，在上述实施例的基础上，为了避免背光模组2弯折后使得电子设备的整机厚度过大，本实施例中，指纹识别模组5内包括光路处理单元，光路处理单元用于减小指纹识别模组5的厚度，有助于电子装置整机的轻薄化。
参考图5所示，本实施例中，光路处理单元包括光学元件5011、反射元件5012，以及用于指纹识别的传感器5013，其中，反射元件5012位于传感器5013的下方，光学元件5011位于反射元件5012和传感器5013的同一侧且靠近显示模组1上的指纹检测区域106设置，光学元件5011用于将穿过显示模组1的探测光汇聚到反射元件5012上，并经反射元件5012反射至传感器5013，以进行指纹识别。
其中，光学元件5011可以包括具有至少一个球面或非球面透镜的微距镜头，以及其他能够将穿过显示模组的探测光汇聚到反射元件5012上的光学元件5011，即光学元件5011包括但不仅限于具有至少一个球面或非球面透镜的微距镜头。其中，至少一个透镜可以由树脂材料或者玻璃材料形成，用于将穿过显示模组的探测光汇聚到反射元件5012上，并经反射元件5012反射至传 感器5013，以进行指纹识别。
本实施例中，用于指纹识别的传感器5013也可以称为光学传感器5013、图像传感器5013、光学指纹传感器5013、光学感应器或指纹检测感应器等，其可以具体包括光学成像芯片，或者具有一定光学叠层的光学成像芯片，其具有用于接收指纹检测光并对指纹检测光进行光电转换的感应阵列。
其中，本实施例中，反射元件5012可以为能够反射探测光的反射镜或者其他能够将探测光反射至传感器5013上的反射件，即本实施例中反射元件5012包括但不仅限于上述反射镜。
与现有技术中光学元件5011设在传感器5013上方的方式相比，参考图5所示，本实施例通过将光学元件5011设置传感器5013的一侧并通过反射元件5012将经光学元件5011汇聚到的探测光反射至传感器5013上，以实现指纹识别的同时，能够减小指纹识别模组5的厚度(即高度)，有助于电子装置整机的轻薄化。与现有技术中光学元件5011设在传感器5013上方的方式相比，本实施例中的指纹识别模组5的厚度减小了3mm-4mm。
具体的，本实施例中，参考图5所示，指纹识别模组5还包括用于向指纹检测区域106上方的手指上发射探测光的检测光源502，检测光源502位于传感器5013的上方。
指纹识别模组5内可以设置一个或多个检测光源502，检测光源502可以为点形检测光源，或者，检测光源502可以为有多个检测光源502形成的线性检测光源。检测光源502可以为红外光源或者其他能够实现指纹识别的非可见光，相应的，检测光源502发出的探测光也为红外光。
示例性的，检测光源502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。检测光源502的发出探测光的光谱范围可以为780nm-1100nm。优选地，可以为850nm或940nm等。
进一步的，参考图5所示，指纹识别模组5还包括用于固定和容纳检测光源502的第一支架505，第一支架505在与检测光源502的上方设有第一开窗结构5051，检测光源502通过第一开窗结构5051向指纹检测区域106发射探测光，通过第一支架505对检测光源502进行固定的同时，能够避免检测光源502发出的探测光的泄露。其中，检测光源502焊接或者粘结在第一支 架505内，且与显示模组1的底部之前存在间隔距离。
需要说明的是，第一开窗结构5051的开孔形状及大小可以满足检测光源502发射的探测光基本可以透过，以避免由于检测光源502发射的探测光无法正常透过第一支架505而影响指纹的识别。
为了实现对光学元件5011和传感器5013的固定，参考图5所示，光学元件5011和传感器5013与第一支架505的底部贴合，其中，光学元件5011和传感器5013与第一支架505的底部的贴合方式包括但不仅限于焊接或者粘结。
为了实现对光路处理单元的保护，参考图5所示，指纹识别模组5还包括用于保护光路处理单元的第二支架506，第二支架506内设有用于容纳光路处理单元的容纳腔(在图中未标示)，其中，第二支架506在与光学元件5011相对位置处设有第二开窗结构(在图中未标示)，第二开窗结构用于使穿过显示模组1的探测光传输至传感器5013，以便实现指纹识别。
需要说明的是，第二开窗结构的开孔形状及大小可以满足穿过显示模组1的探测光基本可以透过，以避免由于携带有指纹信息且穿过显示模组1的探测光无法正常透过第二支架506而影响指纹图像的接收。在本实施例中，对于第二开窗结构的大小以光学元件5011的接收光路为准。
进一步的，参考图5所示，反射元件5012和传感器5013之间存在间距，以便传感器5013接收经反射元件5012反射后的携带有指纹信息的探测光。
具体的，本实施例中，反射元件5012可以贴合在传感器5013上的凸起结构(在图中未标示)上，通过调整凸起结构的高度来调节传感器5013和反射元件5012之间的间距，或者反射元件5012可以设在第二支架506的底部，通过控制第二支架506底部与传感器5013之间的距离来实现对传感器5013和反射元件5012之间的间距的调节。
实施例五
在上述实施例四的基础上，本申请实施例提供一种适用于液晶显示屏的指纹识别模组5，液晶显示屏的背光模组2一端设有弯折区域206并与显示模组1之间形成容纳空间7，指纹识别模组5的指纹检测区域106至少部分位于液晶显示屏的显示区域104，且其包括容纳于容纳空间7的光学元件 5011、反射元件5012以及用于指纹识别的传感器5013，其中，光学元件5011位于反射元件5012和传感器5013的同一侧且靠近液晶显示屏的指纹检测区域106，光学元件5011用于将在液晶显示屏上方的手指形成且穿过显示模组1的探测光汇聚到反射元件5012上，反射元件5012用于将探测光反射至传感器5013，传感器5013用于接收探测光以进行指纹识别。
通过将背光模组2靠近指纹识别模组5的一端弯折且与显示模组1之间形成了容纳空间7，以使指纹识别模组5位于容纳空间7；指纹识别模组5位于容纳空间7内时，指纹识别模组5位于背光模组2之上显示模组1之下，当进行指纹识别时，指纹识别模组5发出的探测光、以及经显示模组1上指纹检测区域106内手指反射的探测光均无需穿过背光模组2，从而解决了为实现LCD光学屏下指纹识别时，进行指纹识别的探测光、以及经显示模组1上指纹检测区域106内手指反射的探测光无法穿透背光模组2，以致形成光学屏下指纹的光信号探测回路的问题，进而在不改变背光膜材的前提下，本实施例通过改变背光模组2的结构在实现了LCD光学屏下指纹识别的同时能够保证显示模组1的显示效果。
由于容纳空间7的大小取决于指纹识别模组5的结构尺寸，因此，本实施例中对于容纳空间7的大小并不做进一步限定，本实施例中，只需保证弯折区域206与显示模组1之间形成的容纳空间7，能够将需满足指纹识别模组5放置在容纳空间7内，且在实现了LCD光学屏下指纹识别的同时能够保证显示模组1的显示效果即可。
探测光与液晶显示屏的背光模组提供的背光波长不同，纹识别模组5发出的探测光为波长范围在可见光波长之外的光，其中，探测光包括但不仅限于红外光。这样利用可见光和红外光在各类膜材中不同的特性，可以既保证背光均匀化，又保证携带有指纹信号的光线失真小，确保指纹识别准确性高。
需要说明的是，本实施例中指纹识别模组5的具体结构可参考上述实施例四中对于指纹识别模组5的描述，在本实施例中，对于指纹识别模组5的结构不再做进一步阐述。
实施例六
图6是本申请实施例六提供的一种液晶显示屏指纹识别系统的分解示意图。
进一步的，在上述实施例的基础上，参考图6，本实施例中，指纹识别模组5两侧的间隙填充第三支架8，以避免大角度观察时，消除指纹识别模组5的突兀感，进而提升显示效果。
第三支架8分布在指纹识别模组5的两侧间隙，以对指纹识别模组5进行进一步限位，如通过第三支架8限制指纹识别模组5沿着与背光模组2或显示模组1宽度相平行的方向移动。
具体的，第三支架8可以通过粘结或卡接固定在指纹识别模组5两侧，用于填充容纳空间7内指纹识别模组5两侧的间隙，避免大角度观察时，消除指纹识别模组5的突兀感，进而提升显示效果。本实施例中，通过在指纹识别模组5两侧的间隙设置第三支架8，因此，当用户大角度观察时，看到的为第三支架8和指纹识别模组5。
需要说明的是，本实施例中，大角度观察指的是从显示模组1背离指纹识别模组5的一端朝着显示模组1靠近指纹识别模组5的一端的方向上观察，即从显示模组1的顶部朝显示模组1的底部观察。
其中，本实施例中，第三支架8的结构为与固定件9的第一弯折部907结构相适配的结构，优选的，第三支架8为与固定件9的第一弯折部907结构相适配的L形结构。本实施例中，第三支架8可以采用黑色的塑胶材料制作而成，或者，第三支架8也可以采用黑色的金属材料制作而成，在本实施例中，对于第三支架8的结构和材料并不做进一步限定。
实施例七
图7是本申请实施例七提供的一种显示模组的结构示意图，图8是本申请实施例七提供的另一种显示模组的结构示意图，图9是本申请实施例七提供的又一种显示模组的局部示意图。
进一步的，在上述实施例的基础上，如图7至图9所示，本申请实施例提供一种电子装置，电子装置包括上述任一实施例中的液晶显示屏指纹识别系统。该电子装置包括上述任一实施例中的屏下光学指纹系统，该电子装置具体可以为液晶显示装置、电子纸、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。
其中，本实施例中，电子装置内设有电池容纳腔10，为了避开电池容纳腔10，弯折区域206的弯折点与电池容纳腔10之间存在间距。
具体的，弯折点与背光模组2靠近指纹识别模组5一端端部的距离小于40mm，以确保能够将指纹识别模组5放置在容纳空间7内的同时，能够避开电池容纳腔10，避免背光模组2的弯折对电池容纳腔10造成的影响，以满足电子装置对电池大容量的需求。
为了尽可能的降低背光模组2的弯折区域206导致的电子装置厚度增大，弯折区域206在满足能够将指纹识别模组5完全放置在形成的容纳空间7内且实现屏下光学指纹识别的前提下，为了尽可能的满足背光模组2发出的背光光源205在显示模组1上的显示效果，弯折区域206的弯折角度越小越好。弯折区域206的弯折角度小于7°。如图1所示，弯折角度为背光模组2的弯折区域206与平直区域207朝着指纹识别模组5的一端的延长段之间的夹角。
为了不增加安电子装置的黑边宽度，本实施例中，指纹识别模组5装配与显示模组1的非显示区域105的下方，来满足电子装置的高屏占比。
需要说明的是，如图1所示，显示模组1包括显示盖板101、以及位于显示盖板101之下的液晶面板102。如图1、图6至图8所示，本实施例显示盖板101靠近背光模组2的一侧的四周丝印有透红外油墨107，透红外油墨107在显示盖板101上的正投影区域为显示模组1的非显示区域105，相应的，显示模组1上在非显示区域105之外的区域为显示模组1上的显示区域104。
其中，本实施例中，如图7至图9所示，显示模组1上的指纹检测区域106至少部分位于显示区域104内，也就是说，指纹检测区域106部分位于显示区域104内，或者，指纹检测区域106完全位于显示区域104内，在本实施例中，对于指纹检测区域106的位置并不做进一步限定，在本实施例中，只需保证在，指纹检测区域106的设置能够实现屏下指纹识别即可。
如图9所示，由于指纹识别模块发出的探测光需透过显示模组1，且经手指反射的携带有指纹信息的探测光需透过显示模组1传输至指纹识别模组5，为了提高探测光的透过率，本实施例中，显示盖板101上与指纹识别模组5的有效光路区503域相对应位置的透红外油墨区域108的范围需大于 指纹识别模组5的检测光源发光区域504，以减小探测光在光路传输中的损耗，提高指纹识别的准确性。其中，透红外油墨区域108为显示盖板102上透红外油墨所形成的区域。其中，显示盖板101包括但不仅限于玻璃盖板。
如图1所示，为了电子装置使用过程中从正面不观察到指纹识别模组5及第三支架8，显示盖板101上与指纹识别模组5和第三支架8相对应位置的透红外油墨区域108的范围需大于指纹识别模组5和第三支架8在显示盖板101上的正投影区域。优选的，指纹识别模组5和第三支架8在显示盖板101上的正投影区域的边缘距离显示盖板101上靠近指纹识别模组5一端的透红外油墨区域108的边缘之间存在大于0.3mm的间隙距离。
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、系统、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 (40)

  1. 一种液晶显示屏指纹识别系统，其特征在于，包括显示模组、背光模组和指纹识别模组，所述背光模组靠近所述指纹识别模组的一端设有弯折区域，所述弯折区域与所述显示模组之间形成了用于容纳所述指纹识别模组的容纳空间，所述指纹识别模组位于所述容纳空间中。
  2. 根据权利要求1所述的液晶显示屏指纹识别系统，其特征在于，所述背光模组朝着背离所述显示模组的一侧弯折，以形成所述弯折区域。
  3. 根据权利要求1或2所述的液晶显示屏指纹识别系统，其特征在于，所述弯折区域的宽度和所述背光模组的宽度相等。
  4. 根据权利要求1或2所述的液晶显示屏指纹识别系统，其特征在于，所述弯折区域的宽度小于所述背光模组的宽度。
  5. 根据权利要求1-4中任意一项所述的液晶显示屏指纹识别系统，其特征在于，所述弯折区域的弯折点与所述背光模组靠近所述指纹识别模组5一端端部之间的距离小于40mm。
  6. 根据权利要求5所述的液晶显示屏指纹识别系统，其特征在于，所述弯折区域的弯折角度小于7°。
  7. 根据权利要求5所述的液晶显示屏指纹识别系统，其特征在于，所述背光模组背离所述指纹识别模组的一端为平直区域，所述平直区域与所述弯折区域圆滑连接。
  8. 根据权利要求1所述的液晶显示屏指纹识别系统，其特征在于，所述背光模组固定在固定件上，所述固定件包括：呈框状的固定件本体、以及用于固定所述背光模组的第一支撑部，所述第一支撑部设在所述固定件本体的内侧壁上，以将所述背光模组固定在所述固定件本体内。
  9. 根据权利要求8所述的液晶显示屏指纹识别系统，其特征在于，所述固定件还包括：用于固定所述弯折区域的第二支撑部，所述弯折区域通过所述第二支撑部固设在所述显示模组上。
  10. 根据权利要求9所述的液晶显示屏指纹识别系统，其特征在于，所述第二支撑部位于所述固定件本体的靠近所述弯折区域一端的侧壁上。
  11. 根据权利要求10所述的液晶显示屏指纹识别系统，其特征在于，所述第二支撑部高于所述第一支撑部，且所述第一支撑部靠近所述背光模组 的一侧边缘外露于所述第二支撑部。
  12. 根据权利要求11所述的液晶显示屏指纹识别系统，其特征在于，所述第一支撑部和所述第二支撑部均为台阶。
  13. 根据权利要求8-12中任意一项所述的液晶显示屏指纹识别系统，其特征在于，所述背光模组通过第一遮光胶粘结在所述第一支撑部上，所述弯折区域通过第二遮光胶粘结在所述显示模组靠近所述背光模组的一侧。
  14. 根据权利要求13所述的液晶显示屏指纹识别系统，其特征在于，所述第一遮光胶和所述第二遮光胶均与所述显示模组的显示区域之间设有安全距离，其中，所述安全距离大于0.2mm。
  15. 根据权利要求8-14中任意一项所述的液晶显示屏指纹识别系统，其特征在于，所述固定件为铁框或者胶铁一体框。
  16. 根据权利要求1-15中任意一项所述的液晶显示屏指纹识别系统，其特征在于，所述背光模组包括：依次堆叠的增亮膜、扩散膜、导光板和反射膜，其中，所述增亮膜靠近所述显示模组的一侧，所述反射膜位于背离所述显示模组的一侧设置。
  17. 根据权利要求16所述的液晶显示屏指纹识别系统，其特征在于，所述导光板靠近所述指纹识别模组的一端设有与所述弯折区域结构相适配的第二弯折部。
  18. 根据权利要求17所述的液晶显示屏指纹识别系统，其特征在于，所述导光板对所述背光模组的可见光的亮度的均匀度均大于90％。
  19. 根据权利要求8所述的液晶显示屏指纹识别系统，其特征在于，所述固定件靠近所述指纹识别模组的一端端部开设有至少一个出线槽，以使所述背光模组和所述指纹识别模组的柔性电路板通过所述出线槽出线。
  20. 根据权利要求1-19中任意一项所述的液晶显示屏指纹识别系统，其特征在于，所述弯折区域与所述指纹识别模组的有效光路区之间存在间隙，其中，所述有效光路区为所述指纹识别模组的探测光、以及经手指反射并进入所述指纹识别模组的所述探测光所形成的最大区域。
  21. 根据权利要求20所述的液晶显示屏指纹识别系统，其特征在于，所述间隙大于0.3mm。
  22. 根据权利要求1-21中任意一项所述的液晶显示屏指纹识别系统，其 特征在于，所述指纹识别模组包括：光路处理单元，所述光路处理单元用于减小所述指纹识别模组的厚度。
  23. 根据权利要求22所述的液晶显示屏指纹识别系统，其特征在于，所述光路处理单元包括：光学元件、反射元件，以及用于指纹识别的传感器，其中，所述反射元件位于所述传感器的下方，所述光学元件位于所述反射元件和所述传感器的同一侧且靠近所述显示模组上的指纹检测区域设置，所述光学元件用于将穿过所述显示模组的所述探测光汇聚到所述反射元件上，并经所述反射元件反射至所述传感器，以进行指纹识别。
  24. 根据权利要求23所述的液晶显示屏指纹识别系统，其特征在于，所述指纹识别模组还包括用于向所述指纹检测区域上方的手指上发射所述探测光的检测光源，所述检测光源位于所述传感器的上方。
  25. 根据权利要求24所述的液晶显示屏指纹识别系统，其特征在于，所述指纹识别模组还包括用于固定和容纳所述检测光源的第一支架，所述第一支架在与所述检测光源的上方设有第一开窗结构，所述检测光源通过所述第一开窗结构向所述指纹检测区域发射所述探测光。
  26. 根据权利要求25所述的液晶显示屏指纹识别系统，其特征在于，所述光学元件和所述传感器与所述第一支架的底部贴合。
  27. 根据权利要求23所述的液晶显示屏指纹识别系统，其特征在于，所述指纹识别模组还包括用于保护所述光路处理单元的第二支架，所述第二支架内设有用于容纳所述光路处理单元的容纳空间，其中，所述第二支架在与所述光学元件相对位置处设有第二开窗结构，所述第二开窗结构用于使穿过所述显示模组的所述探测光传输至所述传感器。
  28. 根据权利要求23所述的液晶显示屏指纹识别系统，其特征在于，所述反射元件和所述传感器之间存在间距，以便所述传感器接收经所述反射元件反射后的携带有指纹信息的所述探测光。
  29. 根据权利要求28所述的液晶显示屏指纹识别系统，其特征在于，所述反射元件贴合在所述传感器上的凸起结构上，或者所述反射元件设在第二支架的底部。
  30. 根据权利要求1-29中任意一项所述的液晶显示屏指纹识别系统，其特征在于，所述指纹识别模组两侧的间隙还填充有第三支架。
  31. 一种电子装置，其特征在于，所述电子装置包括上述权利要求1-30中任一所述的液晶显示屏指纹识别系统。
  32. 根据权利要求31所述的电子装置，其特征在于，所述电子装置内设有电池容纳腔，所述弯折区域的弯折点与所述电池容纳腔之间存在间距。
  33. 根据权利要求31或32所述的电子装置，其特征在于，所述弯折点与所述背光模组靠近所述指纹识别模组一端端部的距离小于40mm。
  34. 根据权利要求33所述的电子装置，其特征在于，所述弯折区域的弯折角度小于7°。
  35. 一种适用于液晶显示屏的指纹识别模组，其特征在于，所述液晶显示屏的背光模组一端设有弯折区域并与显示模组之间形成容纳空间，所述指纹识别模组的指纹检测区域至少部分位于所述液晶显示屏的显示区域，且其包括容纳于所述容纳空间的光学元件、反射元件以及用于指纹识别的传感器，其中，所述光学元件位于所述反射元件和所述传感器的同一侧且靠近所述液晶显示屏的指纹检测区域，所述光学元件用于将在所述液晶显示屏上方的手指形成且穿过所述显示模组的探测光汇聚到所述反射元件上，所述反射元件用于将所述探测光反射至所述传感器，所述传感器用于接收所述探测光以进行指纹识别。
  36. 根据权利要求35所述的指纹识别模组，其特征在于，所述指纹识别模组还包括用于向所述指纹检测区域上方的手指上发射所述探测光的检测光源，所述检测光源位于所述传感器的上方，且所述探测光与所述液晶显示屏的背光模组提供的背光波长不同。
  37. 根据权利要求36所述的指纹识别模组，其特征在于，所述指纹识别模组还包括用于固定和容纳所述检测光源的第一支架，所述第一支架在与所述检测光源的上方设有第一开窗结构，所述检测光源通过所述第一开窗结构向所述指纹检测区域发射所述探测光。
  38. 根据权利要求37所述的指纹识别模组，其特征在于，所述光学元件和所述指纹识别传感器与所述第一支架的底部贴合。
  39. 根据权利要求35所述的指纹识别模组，其特征在于，所述指纹识别模组还包括用于保护所述光路处理单元的第二支架，所述第二支架内设有用于容纳所述光路处理单元的容纳空间，其中，所述第二支架在与所述 光学元件相对位置处设有第二开窗结构，所述第二开窗结构用于使穿过所述显示模组的所述探测光传输至所述传感器。
  40. 根据权利要求39所述的指纹识别模组，其特征在于，所述反射元件和所述传感器之间存在间距，以便所述传感器接收经所述反射元件反射后的携带有指纹信息的所述探测光，所述反射元件贴合在所述传感器上的凸起结构上，或者所述反射元件设在第二支架的底部。
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