WO2021097712A1 - 屏下光学指纹识别装置及***、反射膜和液晶显示屏 - Google Patents

屏下光学指纹识别装置及***、反射膜和液晶显示屏 Download PDF

Info

Publication number
WO2021097712A1
WO2021097712A1 PCT/CN2019/119721 CN2019119721W WO2021097712A1 WO 2021097712 A1 WO2021097712 A1 WO 2021097712A1 CN 2019119721 W CN2019119721 W CN 2019119721W WO 2021097712 A1 WO2021097712 A1 WO 2021097712A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid crystal
reflective film
crystal display
guide plate
optical fingerprint
Prior art date
Application number
PCT/CN2019/119721
Other languages
English (en)
French (fr)
Inventor
曾红林
李家成
青小刚
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/CN2019/119721 priority Critical patent/WO2021097712A1/zh
Priority to CN201980004397.2A priority patent/CN111095290B/zh
Publication of WO2021097712A1 publication Critical patent/WO2021097712A1/zh

Links

Images

Classifications

    • 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
    • G02F1/13338—Input devices, e.g. touch panels

Definitions

  • This application relates to the field of biometric identification technology, and in particular to an under-screen optical fingerprint identification device and system, reflective film and liquid crystal display screen.
  • under-screen fingerprints also known as light-sensitive screen fingerprint recognition
  • optical under-screen fingerprints are the most popular.
  • Liquid crystal display includes a panel and a backlight module.
  • the backlight module has a light guide plate and a reflective film.
  • the infrared light transmitter can send out an infrared light signal, which can pass through the panel and be reflected/scattered or transmitted by the finger to form an infrared light signal carrying fingerprint information (ie fingerprint detection light), infrared light signal Pass through the panel, light guide plate and reflective film to the sensor, so that the sensor collects fingerprint signals and performs fingerprint recognition.
  • fingerprint information ie fingerprint detection light
  • the light guide plate and the reflective film are easily squeezed and deformed, resulting in uneven contact between the light guide plate and the reflective film, and it is easy to produce Newton rings or interference lines that interfere with fingerprint imaging, thereby affecting fingerprint recognition.
  • the present application provides an under-screen optical fingerprint identification device and system, a reflective film and a liquid crystal display, which solves the problem of uneven contact between the light guide plate and the reflective film in the prior art, and it is easy to produce Newton rings or interference lines that interfere with fingerprint imaging, thereby Issues affecting fingerprint recognition.
  • the embodiment of the application provides an under-screen optical fingerprint identification device, which is suitable for a liquid crystal display with a backlight module, the fingerprint identification area of the under-screen optical fingerprint identification device is located in the display area of the liquid crystal display, and the under-screen optical fingerprint identification device includes Fingerprint recognition module, which includes optical fingerprint sensor and optical path guide structure;
  • the optical fingerprint sensor includes an optical sensing array with multiple sensing units.
  • the optical sensing array is used to receive the infrared fingerprint detection light formed by the finger above the liquid crystal display and passing through the liquid crystal display, and detect the finger’s movement based on the infrared fingerprint detection light. Fingerprint information;
  • the light path guiding structure is arranged under the backlight module of the liquid crystal display to guide the infrared fingerprint detection light to the optical fingerprint sensor;
  • the reflective film faces the interval of the support layer on the surface of the light guide plate to reduce the formation of infrared fingerprint detection light between the light guide plate and the reflective film. Interference lines.
  • an infrared light source is further included.
  • the infrared light source is used to emit infrared light to the fingerprint recognition area of the liquid crystal display device to form infrared fingerprint detection light on the finger above the fingerprint recognition area of the liquid crystal display device.
  • This application provides a liquid crystal display optical fingerprint identification system, which includes a liquid crystal display and the above-mentioned under-screen optical fingerprint identification device.
  • the under-screen optical fingerprint identification device is arranged under the liquid crystal display, and the under-screen optical fingerprint identification device is used for detection Fingerprint information of the finger on the top of the LCD screen;
  • the liquid crystal display includes a liquid crystal panel and a backlight module, and the backlight module is arranged under the liquid crystal panel;
  • the backlight module is used to provide a backlight source for the liquid crystal panel, and transmit the infrared fingerprint detection light formed by the finger above the liquid crystal display to the under-screen optical fingerprint identification device under the backlight module;
  • the backlight module includes a laminated light guide plate and a reflective film, the reflective film faces the under-screen optical fingerprint recognition device, the light guide plate faces the liquid crystal panel, and the surface of the reflective film facing the light guide plate has a support layer, and the support layer is used to separate the light guide plate and the reflective film .
  • the supporting layer includes a plurality of first supporting parts arranged at intervals.
  • the surface of the first support portion facing the light guide plate is a curved surface.
  • the distance between the side of the first supporting portion facing the light guide plate and the side of the first supporting portion facing the reflective film ranges from 1 um to 3 um.
  • the light guide plate has a plurality of irregularly distributed second supporting parts, and the second supporting parts are located on the surface of the light guide plate facing the reflective film.
  • the distance between the two opposite sides of the first support portion is greater than or equal to the maximum distance between the second support portions.
  • the distance between two adjacent first support portions is less than or equal to the minimum distance between each second support portion.
  • the distance between the two opposite sides of the first support portion ranges from 130 um to 250 um.
  • the distance between the centers of two adjacent first support parts ranges from 180 um to 300 um.
  • the plurality of first supporting portions are regularly arranged.
  • the present application further includes a reinforcing plate, which is located on the surface of the reflective film facing the fingerprint identification module, and the reinforcing plate has light-transmitting holes.
  • each first support portion on the reinforcing plate covers the light-transmitting hole.
  • the backlight module further includes a homogenizing film, which covers the side of the light guide plate facing away from the reflective film.
  • the backlight module further includes a brightness enhancement film, and the brightness enhancement film covers the side of the light homogenizing film facing away from the light guide plate.
  • This application provides a reflective film suitable for liquid crystal display screens supporting under-screen fingerprint recognition.
  • the reflective film includes a light-permeable substrate layer and a support layer provided on one side of the substrate layer.
  • the support layer is used to cover the reflective film at intervals.
  • the upper light guide plate reduces the interference lines formed by the infrared fingerprint detection light between the light guide plate and the reflective film, so that the infrared fingerprint detection light formed by the finger above the LCD screen is transmitted to the under-screen optics under the LCD screen through the reflective film Fingerprint identification device.
  • the supporting layer includes a plurality of first supporting parts arranged at intervals.
  • the distance between the side of the first supporting portion facing the light guide plate and the side of the first supporting portion facing the reflective film ranges from 1 um to 3 um.
  • the distance between the two opposite sides of the first support portion ranges from 130 um to 250 um.
  • the distance between the centers of two adjacent first support parts ranges from 180 um to 300 um.
  • the plurality of first supporting portions are regularly arranged.
  • the present application also provides a liquid crystal display that supports under-screen fingerprint recognition, including a liquid crystal panel and a backlight module, the backlight module being arranged under the liquid crystal panel;
  • the backlight module is used to provide a backlight source for the liquid crystal panel, and transmits the infrared fingerprint detection light formed by the finger above the liquid crystal display to the under-screen optical fingerprint identification device below the backlight module; wherein the backlight module includes the above-mentioned reflection membrane.
  • the under-screen optical fingerprint recognition device and system, reflective film and liquid crystal display provided by the embodiments of the application.
  • the infrared fingerprint detection light passes through reflection when it is transmitted to the light guide plate and reflective film of the backlight module.
  • the spacing function of the supporting layer on the surface of the film facing the light guide plate reduces the interference lines formed by the infrared fingerprint detection light between the light guide plate and the reflective film. That is, in the embodiment of the present application, a support layer is provided on the reflective film of the backlight module, wherein the support layer is located on the surface of the reflective film facing the light guide plate.
  • the support layer increases the gap between the light guide plate and the reflective film, reduces the degree of adsorption between the light guide plate and the reflective film, and reduces the width and spacing of the interference pattern. At this time, the width of the interference pattern becomes thinner, and the spacing of the interference pattern is reduced by Sparse and densify, thereby destroying the conditions for forming interference lines.
  • the problem of uneven contact between the light guide plate and the reflective film in the prior art is solved, and Newton's rings or interference lines that interfere with fingerprint imaging are easily generated, thereby affecting fingerprint recognition.
  • the support layer because the support layer is provided on the reflective film, the support layer increases the roughness of the reflective film surface, thereby increasing the haze of the reflective film, thereby shielding the interference lines, which is beneficial to reduce the contrast of the interference lines.
  • FIG. 1 is a schematic structural diagram of an under-screen optical fingerprint identification device provided by an embodiment of the application
  • Fig. 2 is a schematic diagram showing the transmission of the existing infrared light on the light guide plate and the reflective film;
  • FIG. 3 is a schematic diagram showing the structure of interference lines generated by the existing infrared light passing through the light guide plate and the reflective film;
  • FIG. 4 is a schematic structural diagram of an under-screen optical fingerprint identification device provided by an embodiment of the application.
  • FIG. 5 is a schematic structural diagram of a backlight module in an under-screen optical fingerprint identification device provided by an embodiment of the application;
  • FIG. 6 is a schematic diagram of a partial structure of a light guide plate, a reflective film, and a reinforcing plate in the backlight module in the under-screen optical fingerprint identification device provided by an embodiment of the application;
  • FIG. 7 is a schematic diagram of the inter-embedded structure of the first support portion and the second support portion in the backlight module of the under-screen optical fingerprint identification device provided by an embodiment of the application;
  • FIG. 8 is a diagram of the first arrangement of the first supporting portion in the backlight module of the under-screen optical fingerprint identification device provided by the embodiment of the application;
  • FIG. 9 is a diagram of a second arrangement of the first support portion in the backlight module of the under-screen optical fingerprint identification device provided by an embodiment of the application.
  • FIG. 10 is a schematic diagram of the structure of a reflective film provided by an embodiment of the application.
  • 100-under-screen optical fingerprint recognition device 101-fingerprint recognition module; 1011-optical fingerprint sensor; 1012-optical path guide structure; 102-infrared light source; 1021-infrared fingerprint detection light; 200-liquid crystal display; 201-liquid crystal panel 202-backlight module; 2021-light guide plate; 20211-second supporting part; 2022-reflective film; 20221-supporting layer; 20222-first supporting part; 20223-substrate layer; 2023-reinforcing plate; 20231-transparent Light hole; 2024-Gloss film; 2025-Brightness enhancement film; 2026-Circuit board; 203-Transparent protective cover; 300-finger; 400-Newton's ring.
  • FIG. 1 is a schematic structural diagram of an under-screen optical fingerprint identification device suitable for a liquid crystal display provided by an embodiment of the application. 1 and 10, an embodiment of the present application provides an under-screen optical fingerprint identification device.
  • the under-screen optical fingerprint identification device 100 can be applied to smart phones, tablet computers, and other mobile terminals or electronic devices that use liquid crystal displays. equipment.
  • the under-screen optical fingerprint identification device 100 can be arranged in a partial area under the liquid crystal display 200, and cooperate with the liquid crystal display 200 to form a liquid crystal display optical fingerprint identification system.
  • the fingerprint recognition area (or fingerprint detection area) of the under-screen optical fingerprint recognition device 100 may be located in at least a part of the display area of the liquid crystal display 200.
  • the above-mentioned under-screen optical fingerprint recognition device 100 is suitable for a liquid crystal display 200 with a backlight module 202.
  • the liquid crystal display 200 includes a liquid crystal panel 201 and a backlight module 202 disposed under the liquid crystal panel 201, and the backlight module 202 is used to provide a backlight source for the liquid crystal panel 201.
  • the backlight source is specifically a uniform surface light source using visible light, so that the liquid crystal panel 201 displays images for the user to watch.
  • the under-screen optical fingerprint identification device 100 is arranged under the liquid crystal display 200, which may specifically refer to that the main functional components of the under-screen optical fingerprint identification device are arranged under the liquid crystal panel 201 or the backlight module 202; in this embodiment, such as As shown in FIG. 6, the main functional components of the under-screen optical fingerprint recognition device 100 (for example, the fingerprint recognition module 101) are arranged under the backlight module 202.
  • the under-screen optical fingerprint recognition device 100 includes a fingerprint recognition module 101, and the fingerprint recognition module 101 includes an optical fingerprint sensor 1011 and an optical path guiding structure 1012.
  • the optical path guiding structure 1012 is used to guide infrared fingerprint detection light to the optical fingerprint sensor 1011.
  • the optical fingerprint sensor 1011 includes an optical sensing array with a plurality of sensing units, and a reading circuit and other auxiliary circuits electrically connected to the optical sensing array.
  • the sensing area of the optical sensing array may correspond to the fingerprint recognition area of the optical fingerprint sensor 1011.
  • the optical fingerprint sensor 1011 may be located below the fingerprint recognition area of the liquid crystal display 200, or may be located in other areas (such as the edge area of the liquid crystal display 200); and the fingerprint recognition module 101 may use the optical path guiding structure 1012 to detect the fingerprint
  • the fingerprint detection light in the recognition area is guided to the optical fingerprint sensor 1011, so that the optical sensor array can receive the fingerprint detection light to detect the fingerprint information of the finger corresponding to the fingerprint detection light.
  • the fingerprint recognition area of the under-screen optical fingerprint recognition device 100 is located in the display area of the liquid crystal display 200, when the user needs to unlock or perform other fingerprint verification on the mobile terminal or electronic device using the under-screen optical fingerprint recognition device 100, Fingerprint input can be realized by pressing the user's finger 300 on the fingerprint recognition area of the liquid crystal display 200. Therefore, the display area of the liquid crystal display 200 can be basically extended to the front of the entire mobile terminal or electronic device, which satisfies Full screen requirements for high screen-to-body ratio.
  • the fingerprint recognition module 101 may also include other optical components, and the other optical components may be a filter layer.
  • the filter layer may be disposed between the optical path guiding structure 1012 and the optical fingerprint sensor 1011.
  • the filter layer is used for The interference light passing through the optical path guiding structure 1012 is filtered out to prevent the interference light from being received by the optical sensor array and affecting the fingerprint recognition performance.
  • the optical fingerprint sensor 1011, the optical path guiding structure 1012, and the filter layer may be packaged in the same optical component to form the fingerprint recognition module 101.
  • the liquid crystal display 200 further includes a transparent protective cover 203, such as a glass cover or a sapphire cover.
  • the transparent protective cover 203 is located above the liquid crystal panel 201 of the liquid crystal display 200 and covers the front surface of the liquid crystal panel 201. Therefore, in the embodiments of the present application, pressing the finger 300 on the liquid crystal display 200 may actually refer to the transparent protective cover 203 pressed on the liquid crystal panel 201 or the protective layer covering the surface of the transparent protective cover 203 (such as tempered film or Other protective films).
  • the under-screen optical fingerprint identification device 100 may use an invisible light source with a specific wavelength as the fingerprint excitation light source to realize optical fingerprint identification.
  • the under-screen optical fingerprint recognition device 100 may also include an infrared light source 102, which may be an infrared LED light source, an infrared vertical cavity surface emitting laser (VCSEL) or an infrared laser Diode (Laser Diode).
  • an infrared light source 102 which may be an infrared LED light source, an infrared vertical cavity surface emitting laser (VCSEL) or an infrared laser Diode (Laser Diode).
  • VCSEL infrared vertical cavity surface emitting laser
  • Laser Diode Laser Diode
  • the infrared light source 102 may be arranged below the edge area of the liquid crystal panel 201, or the infrared light source 102 may also be arranged on the side of the liquid crystal panel 201 and located side by side with the liquid crystal panel 201 under the transparent protective cover 203.
  • the infrared light emitted by the infrared light source 102 can be used as fingerprint excitation light, and the infrared light can be irradiated to the finger 300 above the fingerprint recognition area of the liquid crystal display 200 through the liquid crystal panel 201 or the transparent protective cover 203.
  • the infrared light may be reflected on the surface of the finger 300 or transmitted from the surface of the finger 300 to form infrared fingerprint detection light 1021. Therefore, the infrared fingerprint detection light 1021 carries the fingerprint information of the finger 300, and the infrared fingerprint detection light 1021 can further pass through the liquid crystal panel 201 and the backlight module 202 of the liquid crystal display 200, and be transmitted to the fingerprint under the backlight module 202 Recognition module 101.
  • the fingerprint recognition module 101 guides the infrared fingerprint detection light 1021 to the optical sensor array of the optical fingerprint sensor 1011 through the optical path guiding structure 1012.
  • the optical sensor array can receive the infrared fingerprint detection light 1021 and further detect the finger 300 according to the infrared fingerprint detection light 1021 Fingerprint information.
  • the backlight module 202 of the liquid crystal display 200 may include multiple backlight components.
  • the backlight module 202 may include a light guide plate 2021 and a reflective film 2022 that are stacked, and the light guide plate 2021 faces the liquid crystal panel 201, and the reflective film 2022 faces the fingerprint identification module 101.
  • the light guide plate 2021 is mainly used to guide the visible light source provided by the backlight to the liquid crystal display 200.
  • the reflective film 2022 totally reflects the visible light toward the upper side of the liquid crystal display screen 200.
  • the backlight module 202 may also include a circuit board 2026.
  • the liquid crystal panel 201 is connected to the controller through the circuit board 2026.
  • the circuit board 2026 is arranged on the side edge of the liquid crystal panel 201. In order to avoid leakage of the circuit board 2026, this area is usually also covered. Cover up.
  • FIG. 2 is a schematic diagram of the transmission of the existing infrared light between the light guide plate and the reflective film
  • FIG. 3 is a schematic diagram of the structure of the existing infrared light passing through the light guide plate and the reflective film to produce interference lines.
  • the light guide plate 2021 and the reflective film 2022 may be based on polyester resin (Polyethylene terephthalate, PET) materials.
  • the thickness of the light guide plate 2021 is 400um ⁇ 500um
  • the thickness of the reflective film 2022 is 70um ⁇ 90um
  • the thickness of the light guide plate 2021 and the reflective film 2022 is relatively thin
  • the light guide plate 2021 and the reflective film 2022 are relatively easy to absorb and produce deformation
  • the under-screen optical fingerprint identification device 100 when the infrared fingerprint detection light 1021 is transmitted to the light guide plate 2021 and the reflective film 2022 of the backlight module 202, it faces the surface of the light guide plate 2021 through the reflective film 2022
  • the spacing function of the supporting layer 20221 reduces the interference pattern formed by the infrared fingerprint detection light 1021 between the light guide plate 2021 and the reflective film 2022. That is, in the embodiment of the present application, a support layer 20221 is provided on the reflective film 2022 of the backlight module 202, wherein the support layer 20221 is located on the surface of the reflective film 2022 facing the light guide plate 2021.
  • the support layer 20221 increases the gap between the light guide plate 2021 and the reflective film 2022, reduces the degree of adsorption between the light guide plate 2021 and the reflective film 2022, and reduces the width and spacing of the interference pattern. At this time, the interference pattern becomes thinner. The spacing of the interference lines is changed from sparse to dense, thereby destroying the conditions for the formation of interference lines. This solves the problem of uneven contact between the light guide plate 2021 and the reflective film 2022 in the prior art, which easily produces Newton rings or interference lines that interfere with fingerprint imaging, thereby affecting fingerprint recognition.
  • the support layer 20221 increases the surface roughness of the reflective film 2022, thereby increasing the haze of the reflective film 2022, thereby shielding the interference pattern, which is beneficial to reduce the contrast of the interference pattern .
  • FIG. 4 is a schematic structural diagram of an under-screen optical fingerprint identification device provided by an embodiment of the application
  • FIG. 5 is a schematic structural diagram of a backlight module in an under-screen optical fingerprint identification device provided by an embodiment of the application
  • FIG. 6 is an embodiment of the application provided
  • an embodiment of the present application provides an optical fingerprint identification system for a liquid crystal display, including a liquid crystal display 200 and the under-screen optical fingerprint identification device 100 provided by any of the above embodiments, the under-screen optical fingerprint identification The device 100 is disposed under the liquid crystal display 200, and the under-screen optical fingerprint identification device 100 is used to detect fingerprint information of a finger above the liquid crystal display 200.
  • the liquid crystal display 200 includes a liquid crystal panel 201 and a backlight module 202.
  • the backlight module 202 is arranged below the liquid crystal panel 201; the backlight module 202 is used to provide a backlight source for the liquid crystal panel 201 and will be installed on the liquid crystal display 200.
  • the infrared fingerprint detection light 1021 formed by the upper finger 300 is transmitted to the under-screen optical fingerprint identification device 100 under the backlight module 202. That is, in this embodiment, the backlight module 202 can transmit the infrared fingerprint detection light 1021 to the fingerprint recognition module 101 of the under-screen optical fingerprint recognition device 100.
  • the backlight module 202 includes a laminated light guide plate 2021 and a reflective film 2022.
  • the reflective film 2022 faces the under-screen optical fingerprint identification device 100
  • the light guide plate 2021 faces the liquid crystal panel 201
  • the reflective film 2022 faces the light guide plate 2021.
  • the surface has a support.
  • the layer 20221 and the supporting layer 20221 are used to separate the light guide plate 2021 and the reflective film 2022.
  • the light guide plate 2021 is mainly used to guide the visible light source provided by the backlight to the liquid crystal display 200.
  • the reflective film 2022 totally reflects the visible light toward the upper side of the liquid crystal display screen 200.
  • a support layer 20221 is provided on the reflective film 2022 of the backlight module 202, wherein the support layer 20221 is located on the surface of the reflective film 2022 facing the light guide plate 2021.
  • the support layer 20221 increases the gap between the light guide plate 2021 and the reflective film 2022, reduces the degree of adsorption between the light guide plate 2021 and the reflective film 2022, and reduces the width and spacing of the interference pattern. At this time, the interference pattern becomes thinner. The spacing of the interference lines is changed from sparse to dense, thereby destroying the conditions for the formation of interference lines.
  • the supporting layer 20221 includes a plurality of first supporting portions 20222 arranged at intervals.
  • the first supporting parts 20222 may be spaced and evenly arranged, and the first supporting parts 20222 may also be arranged at irregular intervals.
  • each first supporting portion 20222 functions as a spacer between the light guide plate 2021 and the reflective film 2022, this embodiment is not limited herein.
  • each first support portion 20222 can be set on the reflective film 2022 by screen printing, roller printing, spraying or coating.
  • each first support portion 20222 can be set on the reflective film 2022 by screen printing, roller printing,
  • the spraying or coating method is arranged on the reflective film 2022 to form the support layer 20221, which can reduce the cost without the need to redesign the reflective film 2022.
  • the material of the support layer 20221 may be the same as the material of the reflective film 2022.
  • each first supporting portion 20222 may be the same.
  • each of the first supporting portions 20222 may be rectangular, triangular prism, triangular pyramid, truncated cone shape, spherical shape, or the like.
  • the surface of the first support portion 20222 facing the light guide plate 2021 is a curved surface.
  • the height range of the first support portion 20222 is 1 um to 3 um, that is, the thickness range of the first support portion 20222 is 1 um to 3 um.
  • the distance between the side of the first supporting portion 20222 facing the light guide plate 2021 and the side of the first supporting portion 20222 facing the reflective film 2022 ranges from 1 um to 3 um.
  • the height of each first support portion 20222um is 2.1um.
  • the light guide plate 2021 has a plurality of irregularly distributed second support portions 20211, and the second support portions 20211 are located on the surface of the light guide plate 2021 facing the reflective film 2022.
  • the surface of the light guide plate 2021 facing away from the reflective film 2022 may also be provided with a second support portion 20211, and the shape of the second support portion 20211 on the opposite side of the light guide plate 2021 may be the same or different.
  • This embodiment is not limited here.
  • the shape of the second support portion 20211 of the light guide plate 2021 facing the surface of the reflective film 2022 may be hemispherical.
  • the second supporting portion 20211 of the light guide plate 2021 facing the surface of the reflective film 2022 may also be referred to as a dot.
  • FIG. 7 is a schematic diagram of the inter-embedded structure of the first support portion and the second support portion in the backlight module of the under-screen optical fingerprint identification device provided by an embodiment of the application.
  • the distance between the two opposite sides of the first support portion 20222 is greater than or equal to the maximum distance between the second support portions 20111, that is, Pmax in FIG. 6.
  • the distance between the two opposite sides of the first supporting portion 20222 may be referred to as the width of the first supporting portion 20222, that is, the width W of the first supporting portion 20222 in FIG. 6.
  • the distance between two adjacent first supporting parts 20222 is less than or equal to the minimum distance 20211 between the second supporting parts, that is, Pmin in FIG. 6.
  • the distance between two adjacent first support portions 20222 refers to X in FIG. 6.
  • each second support portion 20211 is irregularly distributed, that is, the two adjacent second support portions 20211 are different, as long as the distance between the two opposite sides of the first support portion 20222 is greater than or equal to each adjacent second support
  • the maximum distance between the portions 20111, and the distance between two adjacent first support portions 20222 is less than or equal to the minimum distance 20211 between each second support portion. This can ensure that the first support portion 20222 can better eliminate interference lines, increase the height between the reflective film 2022 and the dots of the light guide plate 2021, and prevent the first support portion 20222 of the reflective film 2022 and the dots of the light guide plate 2021 from inter-embedding ( As shown in Figure 7).
  • the dots of the light guide plate 2021 close to the backlight source are relatively sparse, the maximum spacing between the dots is 130 um to 200 um, and the minimum spacing between the dots is about 50 um to 100 um. Therefore, in the specific implementation of the present application, the distance between the two opposite sides of the first support portion 20222 ranges from 130 um to 250 um. Optionally, the distance between two opposite sides of the first support portion 20222 is 160 um.
  • the distance P between the centers of two adjacent first support portions 20222 ranges from 180 um to 300 um.
  • the distance between the centers of two adjacent first support portions 20222 is 300um.
  • FIG. 8 is a diagram of the first arrangement of the first supporting part in the backlight module of the under-screen optical fingerprint identification device provided by the embodiment of the application
  • FIG. 9 is the backlight of the under-screen optical fingerprint identification device provided by the embodiment of the application
  • the plurality of first supporting portions 20222 are regularly arranged.
  • the first support portions 20222 may also be arranged in other forms, such as an array form of five-pointed stars, etc., which is not limited in this embodiment.
  • the backlight module 202 further includes a reinforcing plate 2023, which is located on the surface of the reflective film 2022 facing the fingerprint identification module 101, and the reinforcing plate 2023 has a light-transmitting hole 20231.
  • the reinforcing plate 2023 is used for shading, and only the infrared fingerprint detection light 1021 is allowed to pass to the fingerprint recognition module 101 through the light-transmitting hole 20231.
  • the reinforcing plate 2023 can be a steel plate or the like.
  • each first support portion 20222 may be provided only in a part of the reflective film 2022, as long as each first support portion 20222 can cover the light-transmitting hole 20231.
  • the backlight module 202 further includes a homogenizing film 2024, and the homogenizing film 2024 covers the side of the light guide plate 2021 facing away from the reflective film 2022.
  • the homogenizing film 2024 is used for uniform visible light, and the visible light is more uniform.
  • the thickness of the homogenizing film 2024 can range from 45 um to 55 um.
  • the backlight module 202 further includes a brightness enhancement film 2025, and the brightness enhancement film 2025 covers the side of the light homogenizing film 2024 facing away from the light guide 2022 plate.
  • the brightness enhancement film 2025 is used to correct the light exit angle of the backlight to enhance the front light.
  • the liquid crystal display optical fingerprint recognition system provided by the above embodiment is provided with a backlight module 202, which includes a light guide plate 2021 and a reflective film 2022.
  • the reflective film 2022 has a support layer 20221 and a support layer 20221 on the surface facing the light guide plate 2021. Used to space the light guide plate 2021 and the reflective film 2022.
  • the supporting layer 20221 includes a plurality of first supporting parts 20222 arranged at intervals by arranging.
  • the gap between the reflective film 2022 and the light guide plate 2021 is increased, and the first supporting portion 20222 increases the haze of the upper surface of the reflective film 2022 to eliminate or weaken the interference pattern between the light guide plate 2021 and the reflective film 2022 , To reduce the contrast of interference lines.
  • the distance and height of the first supporting portion 20222 and the setting of the size relationship between the first supporting portion 20222 and the second supporting portion 20211 on the light guide plate 2021 can be used to reduce the interference pattern between the light guide plate 2021 and the reflective film 2022.
  • the first supporting part 20222 can effectively reduce the concentric interference pattern formed between the reflective film 2022 and the light guide plate 2021, without greatly affecting the display brightness, and achieve a balance between the interference pattern, display brightness, and fingerprint performance under the screen. .
  • FIG. 10 is a schematic diagram of the structure of a reflective film provided by an embodiment of the application.
  • the present application provides a reflective film suitable for a liquid crystal display screen 200 supporting under-screen fingerprint recognition.
  • the reflective film 2022 includes a light-permeable substrate layer 20223 and is provided on one side of the substrate layer 20223
  • the supporting layer 20221 and the supporting layer 20221 are used to cover the light guide plate 2021 above the reflective film 2022 at intervals to reduce the interference pattern formed by the infrared fingerprint detection light 1021 between the light guide plate 2021 and the reflective film 2022, so that it is above the liquid crystal display 200
  • the infrared fingerprint detection light 1021 formed by the finger 300 is transmitted to the under-screen optical fingerprint recognition device 100 under the liquid crystal display 200 through the reflective film 2022.
  • the support layer 20221 may be arranged on the substrate layer 20223 at even intervals, that is, the substrate layer 20223 is provided with the support layer 20221 instead of only a part of the substrate layer 20223, which facilitates the processing of the reflective film 2022.
  • the present application also provides a liquid crystal display 200 supporting an under-screen fingerprint recognition function, including a liquid crystal panel 201 and a backlight module 202, and the backlight module 202 is arranged under the liquid crystal panel 201;
  • the backlight module 202 is used to provide a backlight source for the liquid crystal panel 201, and transmits the infrared fingerprint detection light 1021 formed by the finger 300 above the liquid crystal display 200 to the under-screen optical fingerprint identification device 100 below the backlight module 202; wherein, The backlight module 202 includes the reflective film 2022 provided in the second or third embodiment above.
  • the distance between the reflective film 2022 and the support layer 20221 on the surface of the light guide plate 2021 reduces the infrared fingerprint detection light.
  • the support layer 20221 increases the gap between the light guide plate 2021 and the reflective film 2022, reduces the degree of adsorption between the light guide plate 2021 and the reflective film 2022, reduces the width and spacing of the interference pattern, and when the interference pattern becomes thinner, the interference
  • the spacing of the lines changes from dense to sparse, which destroys the conditions for forming interference lines. This solves the problem of uneven contact between the light guide plate 2021 and the reflective film 2022 in the prior art, which easily produces Newton rings or interference lines that interfere with fingerprint imaging, thereby affecting fingerprint recognition.
  • the support layer 20221 increases the surface roughness of the reflective film 2022, thereby increasing the haze of the reflective film 2022, thereby shielding the interference pattern, which is beneficial to reduce the contrast of the interference pattern .

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Human Computer Interaction (AREA)
  • Optics & Photonics (AREA)
  • Image Input (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

本申请提供一种屏下光学指纹识别装置及***、反射膜和液晶显示屏，屏下光学指纹识别装置适用于具有背光模组的液晶显示屏，屏下光学指纹识别装置的指纹识别区域位于液晶显示屏的显示区域，屏下光学指纹识别装置包括指纹识别模组，指纹识别模组包括光学指纹传感器和光路引导结构；其中，红外指纹检测光在传输到背光模组的导光板和反射膜时，通过反射膜朝向导光板表面的支撑层的间隔作用，以减少红外指纹检测光在导光板和反射膜之间形成的干扰纹路。

Description

屏下光学指纹识别装置及***、反射膜和液晶显示屏 技术领域
本申请涉及生物识别技术领域，尤其涉及一种屏下光学指纹识别装置及***、反射膜和液晶显示屏。
背景技术
随着手机等电子设备全面屏时代的到来，屏下指纹(也称光感屏幕指纹识别)技术的应用越来越广泛，其中以光学式屏下指纹最为普及。
液晶显示屏幕(Liquid Crystal Display，LCD)包括面板及背光模组。背光模组具有导光板和反射膜。当进行指纹识别时，红外光发射器可以发出红外光信号，该信号可以穿过面板，并被手指反射/散射或透射形成携带有指纹信息的红外光信号(即指纹检测光)，红外光信号穿过面板、导光板和反射膜传至传感器，以使传感器采集指纹信号并进行指纹识别。
但是，导光板与反射膜容易挤压变形，导致导光板与反射膜的接触不均匀，容易产生干扰指纹成像的牛顿环或干扰纹路，从而影响进行指纹识别。
发明内容
本申请提供一种屏下光学指纹识别装置及***、反射膜和液晶显示屏，解决了现有技术中导光板与反射膜的接触不均匀，容易产生干扰指纹成像的牛顿环或干扰纹路，从而影响进行指纹识别的问题。
本申请实施例提供一种屏下光学指纹识别装置，适用于具有背光模组的液晶显示屏，屏下光学指纹识别装置的指纹识别区域位于液晶显示屏的显示区域，屏下光学指纹识别装置包括指纹识别模组，指纹识别模组包括光学指纹传感器和光路引导结构；
光学指纹传感器包括具有多个感应单元的光学感应阵列，光学感应阵列用于接收在液晶显示屏上方的手指形成的并穿过液晶显示屏的红外指纹检测 光，并根据红外指纹检测光检测手指的指纹信息；
光路引导结构设置在液晶显示屏的背光模组下方，用于将红外指纹检测光引导至光学指纹传感器；
其中，红外指纹检测光在传输到背光模组的导光板和反射膜时，通过反射膜朝向导光板表面的支撑层的间隔作用，以减少红外指纹检测光在导光板和反射膜之间形成的干扰纹路。
本申请的具体实施方式中，具体的，还包括红外光源，红外光源用于向液晶显示装置的指纹识别区域发射红外光，以在液晶显示装置的指纹识别区域上方的手指形成红外指纹检测光。
本申请提供一种液晶显示屏光学指纹识别***，包括液晶显示屏和上述的屏下光学指纹识别装置，屏下光学指纹识别装置设置在液晶显示屏的下方，屏下光学指纹识别装置用于检测液晶显示屏上方的手指的指纹信息；
液晶显示屏包括液晶面板和背光模组，背光模组设置在液晶面板的下方；
背光模组用于为液晶面板提供背光源，并将在液晶显示屏上方的手指形成的红外指纹检测光传输至背光模组下方的屏下光学指纹识别装置；
背光模组包括层叠设置的导光板和反射膜，反射膜朝向屏下光学指纹识别装置，导光板朝向液晶面板，反射膜朝向导光板的表面具有支撑层，支撑层用于间隔导光板和反射膜。
本申请的具体实施方式中，具体的，支撑层包括多个间隔设置的第一支撑部。
本申请的具体实施方式中，具体的，第一支撑部朝向导光板的一面为弧面。
本申请的具体实施方式中，具体的，第一支撑部朝向导光板的一面与第一支撑部朝向反射膜的一面之间的距离范围为1um～3um。
本申请的具体实施方式中，具体的，导光板上具有多个不规则分布的第二支撑部，第二支撑部位于导光板朝向反射膜的表面。
本申请的具体实施方式中，具体的，第一支撑部相对的两侧之间的距离大于或等于各第二支撑部之间的最大距离。
本申请的具体实施方式中，具体的，相邻的两个第一支撑部之间的距离小于或等于各第二支撑部之间的最小距离。
本申请的具体实施方式中，具体的，第一支撑部相对的两侧之间的距离范围为130um～250um。
本申请的具体实施方式中，具体的，相邻的两个第一支撑部中心之间的距离范围为180um～300um。
本申请的具体实施方式中，具体的，多个第一支撑部规则排布。
本申请的具体实施方式中，具体的，还包括补强板，补强板位于反射膜朝向指纹识别模组的表面，补强板上具有透光孔。
本申请的具体实施方式中，具体的，各第一支撑部在补强板上的投影覆盖透光孔。
本申请的具体实施方式中，具体的，背光模组还包括均光膜，均光膜覆盖在导光板背离反射膜的一面上。
本申请的具体实施方式中，具体的，背光模组还包括增亮膜，增亮膜覆盖在均光膜背离导光板的一面上。
本申请提供一种反射膜，适用于支持屏下指纹识别功能的液晶显示屏，反射膜包括可透光的衬底层以及在衬底层的一面设置的支撑层，支撑层用于间隔覆盖在反射膜上方的导光板，减少红外指纹检测光在导光板和反射膜之间形成的干扰纹路，使得在液晶显示屏上方的手指形成的红外指纹检测光通过反射膜传输至液晶显示屏下方的屏下光学指纹识别装置。
本申请的具体实施方式中，具体的，支撑层包括多个间隔设置的第一支撑部。
本申请的具体实施方式中，具体的，第一支撑部朝向导光板的一面与第一支撑部朝向反射膜的一面之间的距离范围为1um～3um。
本申请的具体实施方式中，具体的，第一支撑部相对的两侧之间的距离范围为130um～250um。
本申请的具体实施方式中，具体的，相邻的两个第一支撑部中心之间的距离范围为180um～300um。
本申请的具体实施方式中，具体的，多个第一支撑部规则排布。
本申请还提供一种支持屏下指纹识别功能的液晶显示屏，包括液晶面板和背光模组，背光模组设置在液晶面板的下方；
背光模组用于为液晶面板提供背光源，并将在液晶显示屏上方的手指形 成的红外指纹检测光传输至背光模组下方的屏下光学指纹识别装置；其中，背光模组包括上述的反射膜。
本申请实施例提供的屏下光学指纹识别装置及***、反射膜和液晶显示屏，屏下光学指纹识别装置中，红外指纹检测光在传输到背光模组的导光板和反射膜时，通过反射膜朝向导光板表面的支撑层的间隔作用，减少红外指纹检测光在导光板和反射膜之间形成的干扰纹路。即在本申请实施例中，在背光模组的反射膜上设置支撑层，其中支撑层位于反射膜朝向导光板表面。支撑层增加了导光板和反射膜之间的间隙，降低了导光板和反射膜之间的吸附程度，减少了干扰纹路的宽度和间距，此时干扰纹路由宽变细，干扰纹路的间距由疏变密，从而破坏干扰纹路形成条件。解决了现有技术中导光板与反射膜的接触不均匀，容易产生干扰指纹成像的牛顿环或干扰纹路，从而影响进行指纹识别的问题。同时，由于在反射膜上设置支撑层，支撑层增加了反射膜表面的粗糙度，从而增加了反射膜的雾度，从而对干扰纹路进行遮挡，有利于降低干扰纹路的对比度。
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为本申请实施例提供的屏下光学指纹识别装置的结构示意图；
图2为现有的红外光在导光板和反射膜上的传输示意图；
图3为现有的红外光在穿过导光板和反射膜产生干扰纹路的结构示意图；
图4为本申请实施例提供的屏下光学指纹识别装置的结构示意图；
图5为本申请实施例提供的屏下光学指纹识别装置中背光模组的结构示意图；
图6为本申请实施例提供的屏下光学指纹识别装置中背光模组中导光板、反射膜和补强板的局部结构示意图；
图7为本申请实施例提供的屏下光学指纹识别装置的背光模组中第一支撑部与第二支撑部的互嵌结构示意图；
图8为本申请实施例提供的屏下光学指纹识别装置的背光模组中第一支撑部的第一种排布方式图；
图9为本申请实施例提供的屏下光学指纹识别装置的背光模组中第一支撑部的第二种排布方式图；
图10为本申请实施例提供的反射膜的结构示意图。
附图标记说明：
100-屏下光学指纹识别装置；101-指纹识别模组；1011-光学指纹传感器；1012-光路引导结构；102-红外光源；1021-红外指纹检测光；200-液晶显示屏；201-液晶面板；202-背光模组；2021-导光板；20211-第二支撑部；2022-反射膜；20221-支撑层；20222-第一支撑部；20223-衬底层；2023-补强板；20231-透光孔；2024-均光膜；2025-增亮膜；2026-电路板；203-透明保护盖板；300-手指；400-牛顿环。
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。
实施例一
图1为本申请实施例提供的适用于液晶显示屏的屏下光学指纹识别装置的结构示意图。参见图1和图10所示，本申请实施例提供一种屏下光学指纹识别装置，该屏下光学指纹识别装置100可以应用在智能手机、平板电脑以及其他采用液晶显示屏的移动终端或者电子设备。在上述移动终端或电子设备中，屏下光学指纹识别装置100可以设置在液晶显示屏200下方的局部区域，并与液晶显示屏200配合形成液晶显示屏光学指纹识别***。其中，屏下光学指纹识别装置100的指纹识别区域(或者指纹检测区域)可以位于液晶显示屏200的至少部分显示区域中。
上述屏下光学指纹识别装置100适用于具有背光模组202的液晶显示屏 200。其中，液晶显示屏200包括液晶面板201和设置在液晶面板201下方的背光模组202，背光模组202用于为液晶面板201提供背光源。其中，背光源具体为采用可见光的均匀面光源，使液晶面板201显示画面从而供用户观看。屏下光学指纹识别装置100设置在液晶显示屏200的下方，可以具体是指屏下光学指纹识别装置的主要功能部件设置在液晶面板201或者背光模组202的下方；在本实施例中，如图6所示，屏下光学指纹识别装置100的主要功能部件(比如指纹识别模组101)设置在背光模组202的下方。
其中，屏下光学指纹识别装置100包括指纹识别模组101，指纹识别模组101包括光学指纹传感器1011和光路引导结构1012，光路引导结构1012用于将红外指纹检测光引导至光学指纹传感器1011。光学指纹传感器1011包括具有多个感应单元的光学感应阵列以及与该光学感应阵列电连接的读取电路及其他辅助电路。该光学感应阵列的感应区域可以对应光学指纹传感器1011的指纹识别区域。
其中，光学指纹传感器1011可以位于液晶显示屏200的指纹识别区域下方，也可以位于其他区域(比如液晶显示屏200的边缘区域)；并且，指纹识别模组101可以通过光路引导结构1012来将指纹识别区域的指纹检测光引导到光学指纹传感器1011，以使光学感应阵列可以接收到指纹检测光，以检测得到与指纹检测光相对应的手指的指纹信息。
由于屏下光学指纹识别装置100的指纹识别区域位于液晶显示屏200的显示区域中，在使用者需要对采用屏下光学指纹识别装置100的移动终端或者电子设备进行解锁或者其他指纹验证的时候，只需要将使用者的手指300按压在位于该液晶显示屏200的指纹识别区域便可以实现指纹输入，因此，该液晶显示屏200的显示区域可以基本扩展到整个移动终端或电子设备的正面，满足高屏占比的全面屏需求。
其中，指纹识别模组101还可以包括其他光学组件，其他光学组件可以为滤光层(Filter)，该滤光层可以设置在光路引导结构1012和光学指纹传感器1011之间，滤光层用于滤除通过光路引导结构1012的干扰光，以避免上述干扰光被光学感应阵列接收而影响指纹识别性能。其中，光学指纹传感器1011、光路引导结构1012和滤光层可以封装在同一个光学部件以形成指纹识别模组101。
在具体实现时，液晶显示屏200还包括透明保护盖板203，比如玻璃盖板或者蓝宝石盖板，透明保护盖板203位于液晶显示屏200的液晶面板201的上方并覆盖液晶面板201的正面。因此，本申请实施例中，手指300按压在液晶显示屏200实际上可以具体是指按压在液晶面板201上方的透明保护盖板203或者覆盖透明保护盖板203表面的保护层(例如钢化膜或者其他保护膜)。
为了避免指纹检测光与背光模组202提供的背光源相互影响。本申请实施例中，屏下光学指纹识别装置100可以采用特定波长的非可见光源来作为指纹激励光源从而实现光学指纹识别。以红外光为例，具体地，屏下光学指纹识别装置100还可以包括红外光源102，红外光源102可以为红外LED光源、红外垂直腔面发射激光器(Vertical Cavity Surface Emitting Laser，VCSEL)或者红外激光二极管(Laser Diode)。
其中，红外光源102可以设置在液晶面板201的边缘区域下方，或者，红外光源102也可以设置在液晶面板201侧面并与液晶面板201并排位于透明保护盖板203的下方。
红外光源102发出的红外光可以作为指纹激励光，红外光可以通过液晶面板201或者透明保护盖板203照射到液晶显示屏200的指纹识别区域上方的手指300。红外光可以在手指300表面发生反射或者从手指300表面透射形成红外指纹检测光1021。因此，该红外指纹检测光1021携带有手指300的指纹信息，该红外指纹检测光1021可以进一步穿过液晶显示屏200的液晶面板201和背光模组202，并传输到背光模组202下方的指纹识别模组101。指纹识别模组101通过光路引导结构1012将红外指纹检测光1021引导至光学指纹传感器1011的光学感应阵列，光学感应阵列可以接收红外指纹检测光1021并进一步根据指红外指纹检测光1021检测手指300的指纹信息。
在具体实现时，液晶显示屏200的背光模组202可以包括多个背光组件，例如，背光模组202可以包括层叠设置的导光板2021和反射膜2022，导光板2021朝向液晶面板201，反射膜2022朝向指纹识别模组101。其中，导光板2021主要用于将背光灯提供的可见光光源导向液晶显示屏200。反射膜2022将可见光向液晶显示屏200上方全反射。背光模组202还可以包括电路板2026，液晶面板201通过电路板2026与控制器连接，电路板2026设置在液晶面板201的侧 面边缘，为了避免电路板2026外漏，该区域通常也被遮盖区遮盖。
图2为现有的红外光在导光板和反射膜之间的传输示意图；图3为现有的红外光在穿过导光板和反射膜产生干扰纹路的结构示意图。参见图2所示，导光板2021和反射膜2022可以采用涤纶树脂(Polyethylene terephthalate，PET)材料为基础。导光板2021的厚度为400um～500um，反射膜2022的厚度为70um～90um，导光板2021和反射膜2022的厚度较薄，导光板2021和反射膜2022比较容易吸附而产生形变，导光板2021和反射膜2022形变后容易出现接触不均匀的情况。这样，就有产生如图3所示的干扰纹路或牛顿环400(薄膜干涉)的条件，红外指纹检测光1021穿过导光板2021和反射膜2022后，在光学指纹传感器1011上能呈现干涉指纹识别的干扰纹路。
基于以上原因，本申请实施例提供的屏下光学指纹识别装置100中，红外指纹检测光1021在传输到背光模组202的导光板2021和反射膜2022时，通过反射膜2022朝向导光板2021表面的支撑层20221的间隔作用，减少红外指纹检测光1021在导光板2021和反射膜2022之间形成的干扰纹路。即在本申请实施例中，在背光模组202的反射膜2022上设置支撑层20221，其中支撑层20221位于反射膜2022朝向导光板2021表面。支撑层20221增加了导光板2021和反射膜2022之间的间隙，降低了导光板2021和反射膜2022之间的吸附程度，减少了干扰纹路的宽度和间距，此时干扰纹路由宽变细，干扰纹路的间距由疏变密，从而破坏干扰纹路形成条件。解决了现有技术中导光板2021与反射膜2022的接触不均匀，容易产生干扰指纹成像的牛顿环或干扰纹路，从而影响进行指纹识别的问题。同时，由于在反射膜2022上设置支撑层20221，支撑层20221增加了反射膜2022表面的粗糙度，从而增加了反射膜2022的雾度，从而对干扰纹路进行遮挡，有利于降低干扰纹路的对比度。
实施例二
图4为本申请实施例提供的屏下光学指纹识别装置的结构示意图；图5为本申请实施例提供的屏下光学指纹识别装置中背光模组的结构示意图；图6为本申请实施例提供的屏下光学指纹识别装置中背光模组中导光板、反射膜和补强板的局部结构示意图。参见图4至图6所示，本申请实施例提供一 种液晶显示屏光学指纹识别***，包括液晶显示屏200和上述任一实施例提供的屏下光学指纹识别装置100，屏下光学指纹识别装置100设置在液晶显示屏200的下方，屏下光学指纹识别装置100用于检测液晶显示屏200上方的手指的指纹信息。
具体的，液晶显示屏200包括液晶面板201和背光模组202，背光模组202设置在液晶面板201的下方；背光模组202用于为液晶面板201提供背光源，并将在液晶显示屏200上方的手指300形成的红外指纹检测光1021传输至背光模组202下方的屏下光学指纹识别装置100。即本实施例中，背光模组202可以将红外指纹检测光1021传输到屏下光学指纹识别装置100的指纹识别模组101。
本实施例中，为了实现背光模组202将红外指纹检测光1021传输到指纹识别模组101的目的。具体的，背光模组202包括层叠设置的导光板2021和反射膜2022，反射膜2022朝向屏下光学指纹识别装置100，导光板2021朝向液晶面板201，反射膜2022朝向导光板2021的表面具有支撑层20221，支撑层20221用于间隔导光板2021和反射膜2022。其中，导光板2021主要用于将背光灯提供的可见光光源导向液晶显示屏200。反射膜2022将可见光向液晶显示屏200上方全反射。
在本申请实施例中，在背光模组202的反射膜2022上设置支撑层20221，其中支撑层20221位于反射膜2022朝向导光板2021表面。支撑层20221增加了导光板2021和反射膜2022之间的间隙，降低了导光板2021和反射膜2022之间的吸附程度，减少了干扰纹路的宽度和间距，此时干扰纹路由宽变细，干扰纹路的间距由疏变密，从而破坏干扰纹路形成条件。解决了现有技术中导光板2021与反射膜2022的接触不均匀，容易产生干扰指纹成像的牛顿环或干扰纹路，从而影响进行指纹识别的问题。同时，由于在反射膜2022上设置支撑层20221，支撑层20221增加了反射膜2022表面的粗糙度，从而增加了反射膜2022的雾度，从而对干扰纹路进行遮挡，有利于降低干扰纹路的对比度。
在具体实现时，支撑层20221包括多个间隔设置的第一支撑部20222。其中，各第一支撑部20222可以间隔且均匀设置，各第一支撑部20222之间也可以间隔不规则排布。只要各第一支撑部20222起到间隔导光板2021和反射膜2022的作用即可，本实施例在此不做限定。其中，各第一支撑部20222可以采 用网版印刷、滚轮印刷、喷涂或涂布方式设置在反射膜2022上，即本实施例中，各第一支撑部20222可以通过网版印刷、滚轮印刷、喷涂或涂布方式设置在反射膜2022上，从而形成支撑层20221，能够降低成本而不需要重新设计反射膜2022。其中，支撑层20221的材质可以与反射膜2022的材质相同。
在具体实现时，为了便于加工第一支撑部20222，各第一支撑部20222的形状可以相同。例如，各第一支撑部20222可以均为矩形体、三棱柱、三棱锥、圆台状或者球面状等。可选的，第一支撑部20222朝向导光板2021的一面为弧面。
增加第一支撑部20222的高度，有利于增加反射膜2022与导光板2021之间的间隙，使得干扰环路周期变密，甚至消失。但是第一支撑部20222的高度太高对LCD显示亮度有损失。因此，在本实施例中，第一支撑部20222的高度范围为1um～3um，即第一支撑部20222的厚度范围为1um～3um。也就是说，第一支撑部20222朝向导光板2021的一面与第一支撑部20222朝向反射膜2022的一面之间的距离范围为1um～3um。可选的，各第一支撑部20222um的高度为2.1um。
在具体实现时，为了增加导光板2021的导光效果，导光板2021上具有多个不规则分布的第二支撑部20211，第二支撑部20211位于导光板2021朝向反射膜2022的表面。其中，导光板2021背离反射膜2022的表面也可以设置第二支撑部20211，导光板2021相对面的第二支撑部20211的形状可以相同，也可以不同。本实施例在此不做限定。导光板2021朝向反射膜2022的表面的第二支撑部20211的形状可以为半球形。也可将导光板2021朝向反射膜2022的表面的第二支撑部20211称为网点。
图7为本申请实施例提供的屏下光学指纹识别装置的背光模组中第一支撑部与第二支撑部的互嵌结构示意图。参见图4至图7所示，本申请中，第一支撑部20222相对的两侧之间的距离大于或等于各第二支撑部20211之间的最大距离，即图6中Pmax。其中，第一支撑部20222相对的两侧之间的距离可以称为第一支撑部20222的宽度，即图6中第一支撑部20222的宽度W。
进一步的，相邻的两个第一支撑部20222之间的距离小于或等于各第二支撑部之间的最小距离20211,即图6中Pmin。其中，相邻的两个第一支撑部20222之间的距离指即图6中的X。相邻的两个第一支撑部20222之间的间距为图6中 P，其中，P＝W+X。
由于各第二支撑部20211不规则分布，即相邻的两个第二支撑部20211之间不同，只要第一支撑部20222相对的两侧之间的距离大于或等于各相邻的第二支撑部20211之间的最大距离，相邻的两个第一支撑部20222之间的距离小于或等于各第二支撑部之间的最小距离20211。即可保证第一支撑部20222能较好消除干扰纹路，增加反射膜2022与导光板2021的网点之间的高度，防止反射膜2022的第一支撑部20222与导光板2021的网点发生互嵌(如图7所示)。
通常导光板2021靠近背光源的网点较为稀疏，网点之间最大间距为130um～200um，网点之间最小间距约为50um～100um。因此，在本申请的具体实施方式中，第一支撑部20222相对的两侧之间的距离范围为130um～250um。可选的，第一支撑部20222相对的两侧之间的距离为160um。
其中，相邻的两个第一支撑部20222中心之间的距离P范围为180um～300um。可选的，相邻的两个第一支撑部20222中心之间的距离为300um。
图8为本申请实施例提供的屏下光学指纹识别装置的背光模组中第一支撑部的第一种排布方式图；图9为本申请实施例提供的屏下光学指纹识别装置的背光模组中第一支撑部的第二种排布方式图。参见图8和图9所示，在具体实现时，为了便于在反射膜2022上设置第一支撑部20222，多个第一支撑部20222规则排布。例如，图7中矩形阵列形式的排布。或者如图8所示的错开呈菱形的阵列排布方式。其中，各第一支撑部20222也可以呈其他形式排布，例如五角星的阵列形式等，本实施例在此不做限定。
本申请的具体实施方式中，具体的，背光模组202还包括补强板2023，补强板2023位于反射膜2022朝向指纹识别模组101的表面，补强板2023上具有透光孔20231。其中，补强板2023用于遮光，仅允许红外指纹检测光1021经透光孔20231传至指纹识别模组101。其中，补强板2023可以采用钢板等。
因此，为了节约成本，在具体实现时，只要各第一支撑部20222在补强板2023上的投影覆盖透光孔20231即可。也就是说，可以仅在反射膜2022的局部设置各第一支撑部20222，只要各第一支撑部20222能覆盖透光孔20231即可。
本申请的具体实施方式中，背光模组202还包括均光膜2024，均光膜2024 覆盖在导光板2021背离反射膜2022的一面上。其中，均光膜2024用于均匀可见光，时可见光更加均匀。均光膜2024的厚度范围可以为45um～55um。
本申请的具体实施方式中，背光模组202还包括增亮膜2025，增亮膜2025覆盖在均光膜2024背离导光2022板的一面上。其中，增亮膜2025用于修正背光的出光角度使得正面光线加强。
上述实施例提供的液晶显示屏光学指纹识别***，通过设置背光模组202，背光模组202包括导光板2021和反射膜2022，反射膜2022朝向导光板2021的表面具有支撑层20221，支撑层20221用于间隔导光板2021和反射膜2022。支撑层20221包括，通过设置包括多个间隔设置的第一支撑部20222。通过设置第一支撑部20222，增加反射膜2022与导光板2021之间间隙，同时第一支撑部20222增加反射膜2022上表面雾度，以消除或减弱导光板2021与反射膜2022之间干涉纹路，降低干扰纹路对比度。通过第一支撑部20222的间距、高度，以及第一支撑部20222增与导光板2021上第二支撑部20211的尺寸关系的设置，以降低导光板2021与反射膜2022之间的干涉纹路。通过第一支撑部20222能够有效的减少反射膜2022与导光板2021之间形成同心干扰纹路，且不会大幅度影响显示亮度，取得干扰纹路、显示亮度、屏下指纹性能三者之间的平衡。
实施例三
图10为本申请实施例提供的反射膜的结构示意图。参见图4至图10所示，本申请提供一种反射膜，适用于支持屏下指纹识别功能的液晶显示屏200，反射膜2022包括可透光的衬底层20223以及在衬底层20223的一面设置的支撑层20221，支撑层20221用于间隔覆盖在反射膜2022上方的导光板2021，减少红外指纹检测光1021在导光板2021和反射膜2022之间形成的干扰纹路，使得在液晶显示屏200上方的手指300形成的红外指纹检测光1021通过反射膜2022传输至液晶显示屏200下方的屏下光学指纹识别装置100。
其中，反射膜2022的结构和工作原理在上述实施例二中进行了详细说明，本实施例在此不一一赘述。
具体的，支撑层20221可以在衬底层20223上均匀间隔排布，即衬底层20223上均设置支撑层20221，而非仅在衬底层20223的局部设置支撑层20221，这样，便于加工反射膜2022。
实施例四
参见图4至图10所示，本申请还提供一种支持屏下指纹识别功能的液晶显示屏200，包括液晶面板201和背光模组202，背光模组202设置在液晶面板201的下方；
背光模组202用于为液晶面板201提供背光源，并将在液晶显示屏200上方的手指300形成的红外指纹检测光1021传输至背光模组202下方的屏下光学指纹识别装置100；其中，背光模组202包括上述实施例二或实施例三提供的反射膜2022。
其中，背光模组202和背光模组202中的反射膜2022的结构和工作原理在上述实施例中进行了详细说明，本实施例在此不一一赘述。
本申请实施例中，红外指纹检测光1021在传输到背光模组202的导光板2021和反射膜2022时，通过反射膜2022朝向导光板2021表面的支撑层20221的间隔作用，减少红外指纹检测光1021在导光板2021和反射膜2022之间形成的干扰纹路。即在本申请实施例中，在背光模组202的反射膜2022上设置支撑层20221，其中支撑层20221位于反射膜2022朝向导光板2021表面。支撑层20221增加了导光板2021和反射膜2022之间的间隙，降低了导光板2021和反射膜2022之间的吸附程度，减少了干扰纹路的宽度和间距，时干扰纹路由宽变细，干扰纹路的间距由密变疏，从而破坏干扰纹路形成条件。决了现有技术中导光板2021与反射膜2022的接触不均匀，容易产生干扰指纹成像的牛顿环或干扰纹路，从而影响进行指纹识别的问题。同时，由于在反射膜2022上设置支撑层20221，支撑层20221增加了反射膜2022表面的粗糙度，从而增加了反射膜2022的雾度，从而对干扰纹路进行遮挡，有利于降低干扰纹路的对比度。
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 (23)

  1. 一种屏下光学指纹识别装置，适用于具有背光模组的液晶显示屏，其特征在于，所述屏下光学指纹识别装置的指纹识别区域位于所述液晶显示屏的显示区域，所述屏下光学指纹识别装置包括指纹识别模组，所述指纹识别模组包括光学指纹传感器和光路引导结构；
    所述光学指纹传感器包括具有多个感应单元的光学感应阵列，所述光学感应阵列用于接收在所述液晶显示屏上方的手指形成的并穿过所述液晶显示屏的红外指纹检测光，并根据所述红外指纹检测光检测所述手指的指纹信息；
    所述光路引导结构设置在所述液晶显示屏的背光模组下方，用于将所述红外指纹检测光引导至所述光学指纹传感器；
    其中，所述红外指纹检测光在传输到所述背光模组的导光板和反射膜时，通过所述反射膜朝向所述导光板表面的支撑层的间隔作用，以减少所述红外指纹检测光在所述导光板和所述反射膜之间形成的干扰纹路。
  2. 根据权利要求1所述的屏下光学指纹识别装置，其特征在于，还包括红外光源，所述红外光源用于向所述液晶显示装置的指纹识别区域发射红外光，以在所述液晶显示装置的指纹识别区域上方的手指形成所述红外指纹检测光。
  3. 一种液晶显示屏光学指纹识别***，其特征在于，包括液晶显示屏和权利要求1或2所述的屏下光学指纹识别装置，所述屏下光学指纹识别装置设置在所述液晶显示屏的下方，所述屏下光学指纹识别装置用于检测所述液晶显示屏上方的手指的指纹信息；
    所述液晶显示屏包括液晶面板和背光模组，所述背光模组设置在所述液晶面板的下方；
    所述背光模组用于为所述液晶面板提供背光源，并将在所述液晶显示屏上方的手指形成的红外指纹检测光传输至所述背光模组下方的屏下光学指纹识别装置屏下光学指纹识别装置；
    所述背光模组包括层叠设置的导光板和反射膜，所述反射膜朝向所述屏下光学指纹识别装置，所述导光板朝向所述液晶面板，所述反射膜朝向所述导光板的表面具有支撑层，所述支撑层用于间隔所述导光板和所述反射膜。
  4. 根据权利要求3所述的液晶显示屏光学指纹识别***，其特征在于， 所述支撑层包括多个间隔设置的第一支撑部。
  5. 根据权利要求4所述的液晶显示屏光学指纹识别***，其特征在于，所述第一支撑部朝向所述导光板的一面为弧面。
  6. 根据权利要求4所述的液晶显示屏光学指纹识别***，其特征在于，所述第一支撑部朝向所述导光板的一面与所述第一支撑部朝向所述反射膜的一面之间的距离范围为1um～3um。
  7. 根据权利要求4所述的液晶显示屏光学指纹识别***，其特征在于，所述导光板上具有多个不规则分布的第二支撑部，所述第二支撑部位于所述导光板朝向所述反射膜的表面。
  8. 根据权利要求7所述的液晶显示屏光学指纹识别***，其特征在于，所述第一支撑部相对的两侧之间的距离大于或等于各所述第二支撑部之间的最大距离。
  9. 根据权利要求7所述的液晶显示屏光学指纹识别***，其特征在于，相邻的两个所述第一支撑部之间的距离小于或等于各所述第二支撑部之间的最小距离。
  10. 根据权利要求6所述的液晶显示屏光学指纹识别***，其特征在于，所述第一支撑部相对的两侧之间的距离范围为130um～250um。
  11. 根据权利要求4所述的液晶显示屏光学指纹识别***，其特征在于，相邻的两个所述第一支撑部中心之间的距离范围为180um～300um。
  12. 根据权利要求4至11任一项所述的液晶显示屏光学指纹识别***，其特征在于，多个所述第一支撑部规则排布。
  13. 根据权利要求4至11任一项所述的液晶显示屏光学指纹识别***，其特征在于，还包括补强板，所述补强板位于所述反射膜朝向指纹识别模组的表面，所述补强板上具有透光孔。
  14. 根据权利要求13所述的液晶显示屏光学指纹识别***，其特征在于，各所述第一支撑部在所述补强板上的投影覆盖所述透光孔。
  15. 根据权利要求3所述的液晶显示屏光学指纹识别***，其特征在于，所述背光模组还包括均光膜，所述均光膜覆盖在所述导光板背离所述反射膜的一面上。
  16. 根据权利要求15所述的液晶显示屏光学指纹识别***，其特征在于， 所述背光模组还包括增亮膜，所述增亮膜覆盖在所述均光膜背离所述导光板的一面上。
  17. 一种反射膜，适用于支持屏下指纹识别功能的液晶显示屏，其特征在于，所述反射膜包括可透光的衬底层以及在所述衬底层的一面设置的支撑层，所述支撑层用于间隔覆盖在所述反射膜上方的导光板，减少红外指纹检测光在所述导光板和所述反射膜之间形成的干扰纹路，使得在所述液晶显示屏上方的手指形成的红外指纹检测光通过所述反射膜传输至所述液晶显示屏下方的屏下光学指纹识别装置。
  18. 根据权利要求17所述的反射膜，其特征在于，所述支撑层包括多个间隔设置的第一支撑部。
  19. 根据权利要求18所述的反射膜，其特征在于，所述第一支撑部朝向所述导光板的一面与所述第一支撑部朝向所述反射膜的一面之间的距离范围为1um～3um。
  20. 根据权利要求18所述的反射膜，其特征在于，其特征在于，所述第一支撑部相对的两侧之间的距离范围为130um～250um。
  21. 根据权利要求18所述的反射膜，其特征在于，其特征在于，相邻的两个所述第一支撑部中心之间的距离范围为180um～300um。
  22. 根据权利要求18所述的反射膜，其特征在于，其特征在于，多个所述第一支撑部规则排布。
  23. 一种支持屏下指纹识别功能的液晶显示屏，其特征在于，包括液晶面板和背光模组，所述背光模组设置在所述液晶面板的下方；
    所述背光模组用于为所述液晶面板提供背光源，并将在所述液晶显示屏上方的手指形成的红外指纹检测光传输至所述背光模组下方的屏下光学指纹识别装置；其中，所述背光模组包括权利要求17至22中任一项所述的反射膜。
PCT/CN2019/119721 2019-11-20 2019-11-20 屏下光学指纹识别装置及***、反射膜和液晶显示屏 WO2021097712A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2019/119721 WO2021097712A1 (zh) 2019-11-20 2019-11-20 屏下光学指纹识别装置及***、反射膜和液晶显示屏
CN201980004397.2A CN111095290B (zh) 2019-11-20 2019-11-20 屏下光学指纹识别装置及***、反射膜和液晶显示屏

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/119721 WO2021097712A1 (zh) 2019-11-20 2019-11-20 屏下光学指纹识别装置及***、反射膜和液晶显示屏

Publications (1)

Publication Number Publication Date
WO2021097712A1 true WO2021097712A1 (zh) 2021-05-27

Family

ID=70400278

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/119721 WO2021097712A1 (zh) 2019-11-20 2019-11-20 屏下光学指纹识别装置及***、反射膜和液晶显示屏

Country Status (2)

Country Link
CN (1) CN111095290B (zh)
WO (1) WO2021097712A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111738192B (zh) * 2020-06-29 2022-07-12 厦门天马微电子有限公司 显示模组及显示装置
CN111880338B (zh) * 2020-07-31 2023-04-28 厦门天马微电子有限公司 一种显示装置
CN111999935B (zh) * 2020-08-27 2022-07-12 厦门天马微电子有限公司 显示模组及显示装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101975360A (zh) * 2010-10-12 2011-02-16 苏州茂立光电科技有限公司 背光模块以及液晶显示装置
CN104251423A (zh) * 2014-09-24 2014-12-31 京东方光科技有限公司 一种背光模组、显示面板和显示装置
WO2015083906A1 (en) * 2013-12-02 2015-06-11 Lg Electronics Inc. Mobile terminal
CN106168691A (zh) * 2016-09-27 2016-11-30 信利半导体有限公司 一种反射片、背光源及液晶显示模组
CN109716352A (zh) * 2018-12-17 2019-05-03 深圳市汇顶科技股份有限公司 液晶显示指纹模组、屏下指纹识别***及电子设备
CN110188623A (zh) * 2019-05-09 2019-08-30 维沃移动通信有限公司 一种膜材、背光模组、lcd显示模组及终端

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4837471B2 (ja) * 2006-02-20 2011-12-14 三星モバイルディスプレイ株式會社 有機電界発光表示装置及びその製造方法
KR100784012B1 (ko) * 2006-02-20 2007-12-07 삼성에스디아이 주식회사 유기 전계 발광표시장치 및 그의 제조방법
JP5446665B2 (ja) * 2009-09-28 2014-03-19 凸版印刷株式会社 ハードコートフィルムおよびそれを用いたタッチパネル
CN102095138A (zh) * 2010-12-30 2011-06-15 福建华映显示科技有限公司 液晶显示装置及其背光模组
JP6046733B2 (ja) * 2012-09-20 2016-12-21 シャープ株式会社 反射防止フィルム及びその製造方法、並びに、表示装置
JP6093153B2 (ja) * 2012-11-13 2017-03-08 株式会社ダイセル ニュートンリング防止フィルム及びタッチパネル
CN103336328B (zh) * 2013-07-12 2016-12-28 南昌欧菲光学技术有限公司 偏光片组件及显示设备
CN105259174B (zh) * 2015-10-24 2017-12-22 宁波申山新材料科技有限公司 一种功能贴膜纹路测试仪及其测试方法
CN106104574B (zh) * 2016-02-25 2018-06-12 深圳市汇顶科技股份有限公司 指纹识别方法、装置和终端
CN106228144B (zh) * 2016-08-02 2023-10-13 京东方科技集团股份有限公司 一种指纹识别显示装置
CN106778492B (zh) * 2016-11-18 2024-04-16 Oppo广东移动通信有限公司 指纹模组、移动终端及指纹采集方法
CN107491727A (zh) * 2017-07-07 2017-12-19 广东欧珀移动通信有限公司 指纹识别方法、装置及终端
CN107301407B (zh) * 2017-07-14 2020-02-07 京东方科技集团股份有限公司 指纹识别单元及指纹识别方法、显示基板、显示装置
CN108196731A (zh) * 2018-03-19 2018-06-22 成都睿联创想科技有限责任公司 一种带生物指纹识别功能的触摸检测***
CN108446677A (zh) * 2018-05-03 2018-08-24 东莞市美光达光学科技有限公司 一种用于屏幕下方的指纹识别模组
CN110235143B (zh) * 2019-04-30 2023-08-04 深圳市汇顶科技股份有限公司 屏下指纹识别装置和电子设备
CN211087260U (zh) * 2019-11-20 2020-07-24 深圳市汇顶科技股份有限公司 屏下光学指纹识别装置及***、反射膜和液晶显示屏

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101975360A (zh) * 2010-10-12 2011-02-16 苏州茂立光电科技有限公司 背光模块以及液晶显示装置
WO2015083906A1 (en) * 2013-12-02 2015-06-11 Lg Electronics Inc. Mobile terminal
CN104251423A (zh) * 2014-09-24 2014-12-31 京东方光科技有限公司 一种背光模组、显示面板和显示装置
CN106168691A (zh) * 2016-09-27 2016-11-30 信利半导体有限公司 一种反射片、背光源及液晶显示模组
CN109716352A (zh) * 2018-12-17 2019-05-03 深圳市汇顶科技股份有限公司 液晶显示指纹模组、屏下指纹识别***及电子设备
CN110188623A (zh) * 2019-05-09 2019-08-30 维沃移动通信有限公司 一种膜材、背光模组、lcd显示模组及终端

Also Published As

Publication number Publication date
CN111095290B (zh) 2023-09-22
CN111095290A (zh) 2020-05-01

Similar Documents

Publication Publication Date Title
CN107832752B (zh) 指纹识别面板、全屏指纹识别方法及显示装置
EP3396588B1 (en) Display screen, display device and mobile terminal
CN212135453U (zh) 指纹检测装置和电子设备
WO2020082380A1 (zh) 指纹识别装置和电子设备
WO2021097712A1 (zh) 屏下光学指纹识别装置及***、反射膜和液晶显示屏
CN211087260U (zh) 屏下光学指纹识别装置及***、反射膜和液晶显示屏
WO2021097707A1 (zh) 屏下指纹识别装置及***、背光模组和液晶显示屏
CN111095289B (zh) 屏下指纹识别装置以及终端设备
CN110286514A (zh) 一种显示面板及显示装置
US11308725B2 (en) Touch display device
CN211529178U (zh) 屏下指纹识别装置、背光模组、液晶显示屏和电子设备
WO2021012117A1 (zh) 屏下光学指纹识别装置及***、扩散膜和液晶显示屏
CN111999935B (zh) 显示模组及显示装置
WO2021097719A1 (zh) 屏下指纹识别装置及***、导光板组件和液晶显示屏幕
US20240019645A1 (en) Display panel and electronic device
US11227138B2 (en) Liquid crystal display device having fingerprint sensor
EP4027190A1 (en) Line recognition device and display device
WO2021249123A1 (zh) 显示装置及其指纹识别方法
CN211319236U (zh) 指纹检测装置、背光模组、显示屏和电子设备
TWM601851U (zh) 顯示裝置
US11747545B2 (en) Electronic device
CN111801685A (zh) 指纹检测装置和电子设备
CN111767901B (zh) 显示装置
CN111758101B (zh) 指纹检测装置、背光模组、显示屏和电子设备
WO2021147020A1 (zh) 指纹识别装置和电子设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19953104

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19953104

Country of ref document: EP

Kind code of ref document: A1