WO2020113415A1 - 背光模组、液晶模组、指纹识别装置和模组、移动终端 - Google Patents

背光模组、液晶模组、指纹识别装置和模组、移动终端 Download PDF

Info

Publication number
WO2020113415A1
WO2020113415A1 PCT/CN2018/119149 CN2018119149W WO2020113415A1 WO 2020113415 A1 WO2020113415 A1 WO 2020113415A1 CN 2018119149 W CN2018119149 W CN 2018119149W WO 2020113415 A1 WO2020113415 A1 WO 2020113415A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
panel
module
backlight module
liquid crystal
Prior art date
Application number
PCT/CN2018/119149
Other languages
English (en)
French (fr)
Inventor
张玮
李顺展
皮波
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 CN201880002695.3A priority Critical patent/CN109690372A/zh
Priority to PCT/CN2018/119149 priority patent/WO2020113415A1/zh
Publication of WO2020113415A1 publication Critical patent/WO2020113415A1/zh

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0056—Means for improving the coupling-out of light from the light guide for producing polarisation effects, e.g. by a surface with polarizing properties or by an additional polarizing elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Definitions

  • the embodiments of the present application relate to touch detection technology, in particular to a backlight module, a liquid crystal module, a fingerprint recognition device and module, and a mobile terminal.
  • under-screen fingerprint also known as light-sensitive screen fingerprint recognition
  • optical under-screen fingerprints are the most popular.
  • the principle of under-screen fingerprint technology is: when the finger touches the screen, the light emitted by the screen penetrates the cover to illuminate the texture of the fingerprint, the reflected light of the fingerprint penetrates the screen and returns to the sensor, and finally forms a fingerprint image for recognition.
  • a liquid crystal display (Liquid Crystal) (LCD) includes a liquid crystal module and a backlight module.
  • the working principle of the liquid crystal module is to place liquid crystal molecules in two parallel glass substrates, control the liquid crystal molecules to change direction by energizing the glass substrate or not, and refract the light of the backlight module to generate a picture.
  • the LCD screen is used for fingerprint recognition or face recognition. An excitation light source needs to be set to distinguish it from the visible light required for screen display.
  • the diffusion film usually does not transmit infrared light. However, when the LCD screen is used for fingerprint recognition, the diffusion film needs infrared-transparent materials. This material has a high signal haze for the excitation light source, which makes the fingerprint image recognized when the LCD screen uses the off-screen fingerprint technology. .
  • the embodiments of the present application provide a backlight module, a liquid crystal module, a fingerprint recognition device and a module, and a mobile terminal, to solve the technical problem of blurring the recognized fingerprint image when the off-screen fingerprint technology is applied to the LCD screen in the prior art.
  • an embodiment of the present application provides a backlight module, including: a light-transmissive structure, the light-transmissive structure is used to allow light on the side of the backlight module near the panel to penetrate to the backlight module
  • the light-transmittable structure includes a light guide plate, a diffusion film, and a reflective film that are stacked, and the diffusion film is located between the light guide plate and the reflection film and is located away from the panel Side.
  • the backlight module provided by the embodiment of the present application further includes a light-impermeable structure stacked on the light-permeable structure, and the light-impermeable structure has a light-transmitting hole.
  • the light-impermeable structure includes a reinforcing plate, and the reinforcing plate is located on a side of the reflective film facing away from the panel.
  • the backlight module provided in the embodiment of the present application further includes a prism film, the prism film is located on the light guide plate, and the prism film and the diffusion film are respectively located on the light guide plate Opposite sides.
  • the prism film has a plurality of prism bodies, and the sharp angle of the prism body toward the panel is an obtuse angle.
  • the angle of the prism body toward the sharp corner of the panel is 91-175°.
  • the angle of the sharp corner is 100°, 110°, or 120°.
  • the backlight module provided by the embodiment of the present application further includes a polarizing layer on the prism film, and the polarizing layer and the prism body are respectively located on opposite sides of the prism film.
  • an embodiment of the present application provides a liquid crystal module, including a panel and the above backlight module;
  • the panel includes a first substrate, a second substrate, and a liquid crystal molecular layer;
  • the first substrate is parallel to the second substrate, the liquid crystal molecular layer is located between the first substrate and the second substrate, and the backlight module is located below the second substrate.
  • the liquid crystal module provided by the embodiment of the present application further includes a first light source, and the first light source is used to illuminate the panel.
  • an embodiment of the present application provides a fingerprint identification device, including a fingerprint identification module and the above-mentioned liquid crystal module, the fingerprint identification module includes a fingerprint identification chip, an optical lens, and the optical lens is located in the fingerprint identification Between the chip and the liquid crystal module.
  • the fingerprint identification device provided by the embodiment of the present application further includes a second light source, and the second light source is used to make the panel reflect the fingerprint image.
  • the distance between the diffusion film and the first substrate in the liquid crystal module is 1.63 to 1.68 mm.
  • the incident direction of the second light source light source has an angle with the panel of the liquid crystal module.
  • the second light source light source is located on the side of the panel.
  • the second light source light source is located below the panel.
  • the distance between the first side and the second side opposite to the panel is greater than the distance between the first side and the second side opposite to the backlight module
  • the first side of the panel is flush with the first side of the backlight module.
  • the second light source is an infrared light source.
  • an embodiment of the present application provides a mobile terminal, including the foregoing fingerprint identification device.
  • an embodiment of the present application provides a fingerprint identification module applied to a mobile terminal having the above-mentioned liquid crystal module, wherein the fingerprint identification module includes a fingerprint identification chip and an optical lens, and the optical lens is located at the Between the fingerprint identification chip and the liquid crystal module.
  • the backlight module, the liquid crystal module, the fingerprint recognition device and the module, and the mobile terminal provided by the embodiments of the present application.
  • the backlight module is provided with a light-transmitting structure, and the light-transmitting structure is used to make the backlight module close to the panel side The light penetrates to the fingerprint recognition module on the other side of the backlight module.
  • the light-transmitting structure includes a light guide plate, a diffusion film and a reflective film stacked, and the diffusion film is arranged on the side facing away from the panel, that is, the diffusion film is close to the fingerprint recognition module, so that when fingerprint recognition is performed, the fingerprint image can be improved Clarity.
  • FIG. 1 is a schematic structural diagram of a backlight module provided by an embodiment of the present application.
  • Figure 2 is a schematic diagram 1 of the position of the diffusion film and the fingerprint identification module
  • Figure 3 is a schematic diagram 2 of the position of the diffusion film and the fingerprint identification module
  • FIG. 4 is a schematic structural diagram of a prism film in a backlight module provided by an embodiment of the present application.
  • FIG. 6 is a refracted view of a prism film in a backlight module provided by an embodiment of the present application to light;
  • FIG. 7 is a schematic structural diagram of a liquid crystal module provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a fingerprint identification device according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a mobile terminal according to an embodiment of this application.
  • FIG. 10 is a schematic structural diagram of a fingerprint identification module provided by an embodiment of the present application.
  • 10 backlight module
  • 101 light guide plate
  • 102 light guide plate
  • 103 reflection film
  • 104 refinforcing plate
  • 105 prism film
  • 1051 pris body
  • 1052 shrp angle
  • 1053 incidence angle
  • 1054-incidence Light
  • the luminous principle of the LCD screen is: filling liquid crystal material between two parallel plates, changing the arrangement of molecules inside the liquid crystal material by voltage, to achieve the purpose of shading and light transmission, to display different shades and staggered images
  • a ternary color filter layer between two flat plates, a color image can be displayed.
  • under-screen fingerprint technology when a finger touches the screen, the light emitted by the screen penetrates the surface of the screen to illuminate the fingerprint texture, the reflected light of the fingerprint penetrates the screen and returns to the sensor, and finally forms a fingerprint image for recognition.
  • a liquid crystal display (Liquid Crystal) (LCD) includes a liquid crystal module and a backlight module.
  • the working principle of the liquid crystal module is to place liquid crystal molecules in two parallel glass substrates, control the liquid crystal molecules to change direction by energizing the glass substrate or not, and refract the light of the backlight module to generate a picture.
  • the LCD screen is used for fingerprint recognition or face recognition. An excitation light source needs to be set to distinguish it from the visible light required for screen display.
  • the diffusion film usually does not transmit infrared light, but when the LCD screen is used for fingerprint recognition, the diffusion film needs to use infrared-transparent materials, which have a large signal haze to the excitation light source, so that when the LCD screen uses the off-screen fingerprint technology, the fingerprint recognized The image is blurred.
  • haze is the percentage of the transmitted light intensity deviating from the incident light by more than 2.5° angle to the total transmitted light intensity. The greater the haze, the lower the film gloss and transparency, especially the image degree.
  • the backlight module provided by the present application aims to solve the above technical problems of the prior art.
  • the backlight module provided by the embodiment of the present application will be described in detail in combination with multiple examples as follows.
  • FIG. 1 is a schematic structural diagram of a backlight module provided by an embodiment of the present application.
  • a backlight module 10 including: a light-transmissive structure for transmitting light from the side of the backlight module 10 close to the panel 201 to the backlight module 10
  • the light-transmitting structure includes a light guide plate 101, a diffusion film 102 and a reflective film 103 which are stacked, and the diffusion film 102 is located between the light guide plate 101 and the reflection film 103 and is located on a side away from the panel 201 side.
  • the relative positions between the light-transmitting structure and the panel 201 and the fingerprint recognition module 30 are: the panel 201, the light-transmitting structure and the fingerprint recognition module 30 are arranged in order from top to bottom in FIG. 2, and the diffusion film 102 is close to the fingerprint recognition module 30, and the light guide plate 101 is close to the panel 201.
  • the light guide plate 101 is used to guide the scattering direction of light, to improve the brightness of the panel 201 and make the brightness of the panel 201 more uniform.
  • the light guide plate 101 is produced by a printing method and a non-printing method (injection molding).
  • injection molding for example, the light guide plate 101 uses injection molding to press acrylic into a smooth surface block, and then uses a material with high reflection and no light absorption to print the diffusion points on the bottom surface of the light guide plate 101 by screen printing.
  • the printed type and non-printed type of the light guide plate 101 reference may be made to the prior art, and this embodiment is not limited herein.
  • the thickness of the light guide plate 101 is 0.34 to 0.36 mm. Specifically, the thickness of the light guide plate 101 is 0.35 mm.
  • the reflective film 103 is used to reflect the light leaked from the bottom surface of the light guide plate 101 back to the light guide plate 101 to prevent external leakage of the light source, so as to improve the utilization rate of the light source.
  • the reflective film 103 may use PET or PC substrate.
  • the thickness of the reflective film 103 is 0.09 to 0.11 mm. Specifically, the thickness of the reflective film 103 is 0.1 mm.
  • the diffusion film 102 is used to correct the propagation direction of the light emitted from the light guide plate 101 and provide uniform and soft light to the panel 201.
  • the diffusion film 102 may use PET or PC substrate.
  • the thickness of the diffusion film 102 is 0.04 to 0.06 mm. Specifically, the thickness of the diffusion film 102 is 0.05 mm.
  • the light source illuminating the panel 201 is different from the light source for fingerprint identification, that is, the light described is the light emitted by the light source during fingerprint identification, as described in the light guide plate 101, the diffusion film 102, and the reflection film 103 Is the light emitted by the light source illuminating the panel 201.
  • FIG. 2 is a schematic diagram 1 of the positions of the diffusion film and the fingerprint identification module
  • FIG. 3 is a schematic diagram 2 of the positions of the diffusion film and the fingerprint identification module.
  • FIGS. 2 and 3 show the direction of the optical signal when the diffusion film 102 and the fingerprint recognition module 301 are at different positions.
  • the distance between the diffusion film 102 and the fingerprint identification module 301 in FIG. 2 is greater than the diffusion film 102 and the fingerprint in FIG. 3 Identify the distance between modules 301.
  • the diffusion film 102 can reduce the range of optical signal diffusion and reduce the effect of overlap between signals, so that The fingerprint image is clearer. Therefore, during fingerprint recognition, the relative position between the light guide plate 101, the diffusion film 102 and the reflection film 103 in the backlight module 10 determines the sharpness of the fingerprint image.
  • the diffusion film 102 is disposed away from One side of the panel 201, that is, the diffusion film 102 is close to the fingerprint recognition module 30, can improve the clarity of the fingerprint image when performing fingerprint recognition.
  • the light of the light source for fingerprint recognition is reflected toward the surface of the panel 201, and the optical signal of the fingerprint image from the surface of the panel 201 sequentially penetrates the light guide plate 101, the diffusion film 102, and the reflective film 103, and enters the fingerprint recognition mode In group 30, a fingerprint image is finally formed for identification.
  • the backlight module provided by the embodiment of the present application is provided with a light-transmitting structure, which is used to allow light from the side of the backlight module 10 close to the panel 201 to penetrate to the fingerprint recognition module on the other side of the backlight module 10 30.
  • the light-transmitting structure includes a light guide plate 101, a diffusion film 102 and a reflection film 103 that are stacked, and the diffusion film 102 is disposed on a side facing away from the panel 201, that is, the diffusion film 102 is close to the fingerprint recognition module 30, so that fingerprint recognition is performed Can improve the clarity of fingerprint images.
  • the backlight module provided by the embodiment of the present application further includes a light-impermeable structure stacked on the light-permeable structure, and the light-impermeable structure has a light-transmitting hole. Specifically, the light enters the fingerprint identification module 30 through the light-transmitting hole.
  • the area of the light-transmitting hole is equal to or greater than the area of the fingerprint recognition area in the fingerprint recognition module 30, so that the fingerprint image on the panel 201 can completely penetrate the fingerprint recognition of the backlight module 10 to the fingerprint recognition module 30 within the area.
  • the light-impermeable structure includes a reinforcing plate 104 which is located on the side of the reflective film 103 facing away from the panel 201.
  • the reinforcing plate 104 may also be referred to as a shading plate, and a light-transmitting hole is provided on the reinforcing plate 104, and light enters the fingerprint recognition module 30 through the light-transmitting hole.
  • the remaining opaque parts of the reinforcing plate 104 are used for shading or Reflect light.
  • the reinforcing plate 104 is a steel plate, and the thickness of the reinforcing plate 104 is 0.09 to 0.11 mm. Specifically, the thickness of the reinforcing plate 104 is 0.1 mm.
  • the reinforcing plate 104 can also use other materials for shading, such as black and white glue. This embodiment is not limited herein.
  • the backlight module provided by the embodiment of the present application further includes a prism film 105.
  • the prism film 105 is located on the light guide plate 101, and the prism film 104 and the diffusion film 102 are respectively located on opposite sides of the light guide plate 101.
  • the prism film 105 is used to increase the brightness of the panel 201. Specifically, the prism film 105 improves the angular distribution of light and converges the light emitted from the diffusion film 102 evenly to various angles to the axial angle, that is, the panel 201 From the front view angle, the axial brightness is increased without increasing the total outgoing light flux.
  • the thickness of the prism film 105 is 0.09 to 0.11 mm. Specifically, the thickness of the prism film 105 is 0.1 mm.
  • FIG. 5 is a refraction diagram of light rays of a prism film in the prior art.
  • the prism film 105 has a plurality of prism bodies 1051, and the sharp angle 1052 of the prism body 1051 toward the panel 201 is 90°.
  • the light used for fingerprint recognition enters the backlight module 10 through the panel 201, and the incident angle 1053 of the incident light 1054 is greater than 90° to allow small angle light to pass through the prism film 105, therefore, small angle light cannot pass through
  • the prism film 105 enters the fingerprint recognition module 30, which causes the center region of the fingerprint image to present the imaging result of the divided image.
  • the incident light 1054 needs to basically reach 90° to be refracted (the light sparse medium enters the light dense medium) to form a small angle of light (perpendicular to the lower surface of the prism body 1051, not Larger refraction occurs, thereby maintaining a small angle to reach the fingerprint recognition module 30).
  • the prism film with a sharp angle 1052 of 90° no light of 90° hits the lower surface of the prism body 1051.
  • the prism film 105 has a plurality of prism bodies 1051, and the acute angle 1052 of the prism body 1051 toward the panel 201 is an obtuse angle.
  • the sharp corner 1052 of the prism body 1051 toward the panel 201 is set to an obtuse angle. In this way, even if the incident angle 1053 of the incident light 1054 is less than 90°, light at a small angle can pass through the prism film 105 without causing great refraction.
  • more imaging areas can be formed in the fingerprint identification module 30, a larger available field of view can be obtained, and the performance of fingerprint identification is improved.
  • the angle of the prism body 1051 toward the sharp corner 1052 of the panel 201 is 100-160°.
  • the angle of the prism body 1051 toward the sharp corner 1052 of the panel 201 is 120°, and the fingerprint imaging quality is the best at this time.
  • the backlight module provided by the embodiment of the present application further includes a polarizing layer 1053 on the prism film 105, and the polarizing layer 1053 and the prism body 1051 are located on opposite sides of the prism film 105, respectively.
  • the polarizing layer 1053 is used to form polarized light and increase the brightness of the panel 201.
  • the material of the polarizing layer 1053 may be polyvinyl alcohol (PVA); a protective layer for protecting the polarizing layer 1053 may also be provided on the polarizing layer 1053, and the material of the protective layer is cellulose triacetate (TAC).
  • PVA polyvinyl alcohol
  • TAC cellulose triacetate
  • the polarizing layer 1053 can also use other materials with the same function, and the protective layer can also use other suitable materials with protective functions.
  • the backlight module provided by the embodiment of the present application can also be used in face recognition.
  • the principle of face recognition is the same as the principle of fingerprint recognition in the above embodiment, and this embodiment is not limited herein.
  • FIG. 7 is a schematic structural diagram of a liquid crystal module provided by an embodiment of the present application. As shown in FIG. 7, an embodiment of the present application further provides a liquid crystal module 20, wherein the liquid crystal module 20 includes a panel 201 and the backlight module 10 described above.
  • the panel 201 includes a first substrate 202, a second substrate 203, and a liquid crystal molecular layer 204;
  • the first substrate 202 is parallel to the second substrate 203, the liquid crystal molecular layer 204 is located between the first substrate 202 and the second substrate 203, and the backlight module 10 is located below the second substrate 203.
  • the thickness of the panel 201 is 1.1-1.3 mm, and optionally, the thickness of the panel 201 is 1.2 mm.
  • the liquid crystal module 20 provided by the embodiment of the present application further includes a first light source (not shown in the figure), and the first light source is used to illuminate the panel 201.
  • the first light source may be an LED backlight, and the LED backlight has a long service life.
  • the LED backlight can use an LED light bar.
  • the first light source may be located on the side of the backlight module 10 to illuminate the panel 201 in the form of side incident light, that is, an edge-lit backlight.
  • the first light source may also be located on the reinforcing plate 104 to illuminate the panel 201 in the form of vertical incident light, that is, a direct-type backlight.
  • the position of the first light source is not limited in this embodiment.
  • FIG. 8 is a schematic structural diagram of a fingerprint identification device according to an embodiment of the present application. As shown in FIG. 8, an embodiment of the present application provides a fingerprint identification device 30.
  • the fingerprint identification device 30 includes a fingerprint identification module 301 and the above-mentioned liquid crystal module 20.
  • the fingerprint identification module 301 includes a fingerprint identification chip 3011 and an optical lens 3012 The optical lens 3012 is located between the fingerprint identification chip 3011 and the liquid crystal module 20.
  • liquid crystal module 20 has been described in detail in the above embodiment, and will not be repeated here.
  • the fingerprint identification chip 3011 is used to identify the optical signal from the fingerprint image on the surface of the panel 201.
  • the light of the light source for fingerprint recognition is reflected toward the surface of the panel 201, and the optical signal of the fingerprint image from the surface of the panel 201 sequentially penetrates the light guide plate 101, the diffusion film 102, and the reflection film 103, and passes through the optical lens.
  • 3012 enters the fingerprint recognition chip 3011 in the fingerprint recognition module 30, and recognizes the optical signal of the fingerprint image from the surface of the panel 201 through the fingerprint recognition chip 3011.
  • the fingerprint identification device 30 provided by the embodiment of the present application further includes a second light source 302, and the second light source 302 is used to make the panel 201 reflect the fingerprint image.
  • the second light source 302 is an infrared light source.
  • the incident direction of the light source of the second light source 302 has an angle with the panel 201 of the liquid crystal module 20. That is, the light source of the second light source 302 inclines into the panel 201, thus increasing the area of the fingerprint image reflected by the panel 201 by the second light source 302.
  • the position of the second light source 302 can be implemented in the following two ways:
  • the second light source 302 is located on the side of the panel 201.
  • the second light source 302 is located below the panel 201.
  • the first side of the panel 201 is flush with the first side of the backlight module 10, and the distance between the first and second sides of the panel 201 opposite is greater than that of the first and second sides of the backlight module The distance between the sides. That is, in FIG. 8, in one direction, the length of the panel 201 is greater than the length of the backlight module 10, that is, the panel 201 partially overlaps with the backlight module 10, and the second light source 302 is located on the panel 201 that does not overlap with the backlight module 10 Below.
  • the distance between the diffusion film 102 and the first substrate 202 in the liquid crystal module 20 is 1.63-1.68 mm. Within this distance range, when fingerprint recognition is performed, the clarity of the fingerprint image can be improved.
  • FIG. 9 is a schematic structural diagram of a mobile terminal according to an embodiment of the present application. As shown in FIG. 9, on the basis of the foregoing embodiments, the embodiments of the present application provide a mobile terminal 40, and the mobile terminal 40 includes the fingerprint identification device 30 described above.
  • the structure of the fingerprint identification device 30 has been described in detail in the above embodiments, and will not be repeated here.
  • the mobile terminal 40 can be a liquid crystal module, electronic paper, organic light-emitting diode (Organic Light-Emitting Diode, OLED) panel, mobile phone, tablet computer, television, display, notebook computer, digital photo frame, navigator, wearable Any product or component with display function, such as equipment or household appliances.
  • OLED Organic Light-Emitting Diode
  • FIG. 10 is a schematic structural diagram of a fingerprint identification module provided by an embodiment of the present application.
  • an embodiment of the present application provides a fingerprint identification module 60, which is applied to a mobile terminal 50 having the above-mentioned liquid crystal module 20, wherein the fingerprint identification module
  • the group 60 includes a fingerprint identification chip 3011 and an optical lens 3012, and the optical lens 3012 is located between the fingerprint identification chip 3011 and the liquid crystal module 20.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Human Computer Interaction (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Image Input (AREA)
  • Liquid Crystal (AREA)

Abstract

一种背光模组（10）、液晶模组（20）、指纹识别装置（30）和模组（301,60）、移动终端（40,50）。背光模组（10），包括：可透光结构，可透光结构用于使背光模组（10）的靠近面板一侧的光线贯穿至背光模组（10）另一侧的指纹识别模组（301,60），可透光结构包括层叠设置的导光板（101）、扩散膜（102）和反射膜（103），扩散膜（102）位于导光板（101）和反射膜（103）之间且位于背离面板（201）的一侧。背光模组（10）、液晶模组（20）、指纹识别装置（30）和模组（301,60）、移动终端（40,50），在进行指纹识别时，能提高指纹图像的清晰度。

Description

背光模组、液晶模组、指纹识别装置和模组、移动终端 技术领域
本申请实施例涉及触摸检测技术，尤其涉及一种背光模组、液晶模组、指纹识别装置和模组、移动终端。
背景技术
随着手机等电子器件全面屏时代的到来，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。屏下指纹技术的原理为：当手指接触屏幕时，屏幕发出的光线穿透盖板将指纹纹理照亮，指纹反射光线穿透屏幕返回传感器，最终形成指纹图像来进行识别。
液晶显示屏幕(Liquid Crystal Display，LCD)包括液晶模组及背光模组。液晶模组的工作原理是在两片平行的玻璃基板当中放置液晶分子，通过给玻璃基板通电与否来控制液晶分子改变方向，将背光模组的光线折射出来产生画面。LCD屏做指纹识别或人脸识别，需要设置激励光源，用于与屏幕显示所需的可见光区分。
扩散膜通常不透红外，但是，LCD屏做指纹识别时扩散膜需要透红外的材料，该材料对激励光源的信号雾度较大，使LCD屏应用屏下指纹技术时，识别的指纹图像模糊。
发明内容
本申请实施例提供一种背光模组、液晶模组、指纹识别装置和模组、移动终端，以解决现有技术中LCD屏应用屏下指纹技术时，识别的指纹图像模糊的技术问题。
第一方面，本申请实施例提供一种背光模组，包括：可透光结构，所述可透光结构用于使所述背光模组的靠近面板一侧的光线贯穿至所述背光模组另一侧的指纹识别模组，所述可透光结构包括层叠设置的导光板、扩散膜和反射膜，所述扩散膜位于所述导光板和所述反射膜之间且位于背离所述面板的一侧。
作为一种可选的方式，本申请实施例提供的背光模组，还包括和所述可透光结构层叠设置的不可透光结构，所述不可透光结构上具有透光孔。
作为一种可选的方式，本申请实施例提供的背光模组，所述不可透光结构包括补强板，所述补强板位于所述反射膜的背离所述面板的一侧。
作为一种可选的方式，本申请实施例提供的背光模组，还包括棱镜膜，所述棱镜膜位于所述导光板上，所述棱镜膜和所述扩散膜分别位于所述导光板的相对两侧。
作为一种可选的方式，本申请实施例提供的背光模组，所述棱镜膜上具有多个棱镜体，所述棱镜体朝向所述面板的尖角为钝角。
作为一种可选的方式，本申请实施例提供的背光模组，所述棱镜体朝向所述面板的尖角的角度为91～175°。
作为一种可选的方式，本申请实施例提供的背光模组，所述尖角的角度为100°、110°或120°。
作为一种可选的方式，本申请实施例提供的背光模组，所述棱镜膜上还具有偏光层，所述偏光层和所述棱镜体分别位于所述棱镜膜相对的两侧。
第二方面，本申请实施例提供一种液晶模组，包括面板和上述的背光模组；
所述面板包括第一基板、第二基板、液晶分子层；
所述第一基板与所述第二基板平行，所述液晶分子层位于所述第一基板和所述第二基板之间，所述背光模组位于所述第二基板下方。
作为一种可选的方式，本申请实施例提供的液晶模组，还包括第一光源，所述第一光源用于照亮所述面板。
第三方面，本申请实施例提供一种指纹识别装置，包括指纹识别模组和上述的液晶模组，所述指纹识别模组包括指纹识别芯片、光学镜头，所述光学镜头位于所述指纹识别芯片和所述液晶模组之间。
作为一种可选的方式，本申请实施例提供的指纹识别装置，还包括第二光源，所述第二光源用于使所述面板反射指纹图像。
作为一种可选的方式，本申请实施例提供的指纹识别装置，所述液晶模组中所述扩散膜与所述第一基板之间的距离为1.63～1.68mm。
作为一种可选的方式，本申请实施例提供的指纹识别装置，所述第二光 源光源的入射方向与所述液晶模组的面板具有夹角。
作为一种可选的方式，本申请实施例提供的指纹识别装置，所述第二光源光源位于所述面板的侧方。
作为一种可选的方式，本申请实施例提供的指纹识别装置，所述第二光源光源位于所述面板的下方。
作为一种可选的方式，本申请实施例提供的指纹识别装置，所述面板相对的第一侧和第二侧之间的距离大于所述背光模组相对的第一侧和第二侧之间的距离，所述面板的第一侧与所述背光模组的第一侧平齐。
作为一种可选的方式，本申请实施例提供的指纹识别装置，所述第二光源为红外光源。
第四方面，本申请实施例提供一种移动终端，包括上述的指纹识别装置。
第五方面，本申请实施例提供一种指纹识别模组，应用于具有上述的液晶模组的移动终端，其中，所述指纹识别模组包括指纹识别芯片和光学镜头，所述光学镜头位于所述指纹识别芯片和所述液晶模组之间。
本申请实施例提供的背光模组、液晶模组、指纹识别装置和模组、移动终端，背光模组通过设置可透光结构，可透光结构用于使背光模组的靠近面板一侧的光线贯穿至背光模组另一侧的指纹识别模组。可透光结构包括层叠设置的导光板、扩散膜和反射膜，将扩散膜设置在背离面板的一侧，即扩散膜靠近指纹识别模组，这样，在进行指纹识别时，能提高指纹图像的清晰度。
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一种背光模组的结构示意图；
图2为扩散膜与指纹识别模组的位置示意图一；
图3为扩散膜与指纹识别模组的位置示意图二；
图4为本申请实施例提供的一种背光模组中棱镜膜的结构示意图；
图5为现有技术中一种棱镜膜对光线的折射图；
图6为为本申请实施例提供的一种背光模组中棱镜膜对光线的折射图；
图7为本申请实施例提供的一种液晶模组的结构示意图；
图8为本申请实施例提供的一种指纹识别装置的结构示意图；
图9为本申请实施例提供的一种移动终端的结构示意图；
图10为本申请实施例提供的一种指纹识别模组的结构示意图。
附图标记说明：
10—背光模组；101—导光板；102—扩散膜；103—反射膜；104—补强板；105—棱镜膜；1051—棱镜体；1052—尖角；1053—入射角；1054-入射光；
20—液晶模组；201—面板；202—第一基板；203—第二基板；204—液晶分子层；
30—指纹识别装置；301、60—指纹识别模组；3011—指纹识别芯片；3012—光学镜头；302—第二光源；
40、50—移动终端。
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。
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”及“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。
LCD屏的发光原理为：在两块平行板之间填充液晶材料，通过电压来改变液晶材料内部分子的排列状况，以达到遮光和透光的目的，来显示深浅不一，错落有致的图象，在两块平板间再加上三元色的滤光层，就可实现显示彩色图象。
屏下指纹技术的原理为：当手指接触屏幕时，屏幕发出的光线穿透屏幕表面将指纹纹理照亮，指纹反射光线穿透屏幕返回传感器，最终形成指纹图像来进行识别。
液晶显示屏幕(Liquid Crystal Display，LCD)包括液晶模组及背光模组。液晶模组的工作原理是在两片平行的玻璃基板当中放置液晶分子，通过给玻璃基板通电与否来控制液晶分子改变方向，将背光模组的光线折射出来产生画面。LCD屏做指纹识别或人脸识别，需要设置激励光源，用于与屏幕显示所需的可见光区分。但是，扩散膜通常不透红外，但LCD屏做指纹识别时扩散膜需要采用透红外的材料，该材料对激励光源的信号雾度较大，使LCD屏应用屏下指纹技术时，识别的指纹图像模糊。
其中，雾度(haze)是偏离入射光2.5°角以上的透射光强占总透射光强的百分数，雾度越大意味着薄膜光泽以及透明度尤其成像度下降。
故而，本申请提供的背光模组，旨在解决现有技术的如上技术问题。
如下结合多个实例对本申请实施例提供的背光模组进行详细说明。
图1为本申请实施例提供的一种背光模组的结构示意图。如图1所示，本申请实施例提供一种背光模组10，包括：可透光结构，可透光结构用于使背光模组10的靠近面板201一侧的光线贯穿至背光模组10另一侧的指纹识别模组30，可透光结构包括层叠设置的导光板101、扩散膜102和反射膜103，扩散膜102位于导光板101和反射膜103之间且位于背离面板201的一侧。
具体的，可透光结构与面板201和指纹识别模组30之间的相对位置为：面板201、可透光结构和指纹识别模组30按照图2中从上之下依次排布，扩散膜102靠近指纹识别模组30，导光板101靠近面板201。
其中，导光板101用于引导光的散射方向，用来提高面板201的亮度，并使面板201的亮度更加均匀。导光板101采用印刷式及非印刷式(射出成 型)的方法制作。比如，导光板101利用射出成型的方法将丙烯压制成表面光滑的板块，然后用具有高反射且不吸光的材料，在导光板101的底面用网版印刷的方式印上扩散点。具体的，导光板101的印刷式及非印刷式可以参照现有技术中，本实施例在此不作限定。
导光板101的厚度为0.34～0.36mm。具体的，导光板101的厚度为0.35mm。
反射膜103用于将导光板101底面漏出的光反射回导光板101，防止光源外漏，以提高光源的利用率。反射膜103可以采用PET或PC基材。
反射膜103的厚度为0.09～0.11mm。具体的，反射膜103的厚度为0.1mm。
扩散膜102用于修正从导光板101射出光线的传播方向，为面板201提供均匀、柔和的光线。扩散膜102可以采用PET或PC基材。
扩散膜102的厚度为0.04～0.06mm。具体的，扩散膜102的厚度为0.05mm。
需要说明的是，照亮面板201的光源与进行指纹识别的光源不同，也就是说，描述的光线为进行指纹识别时的光源发出的光线，导光板101、扩散膜102和反射膜103中描述的光为照亮面板201的光源发出的光线。
下面以屏下指纹成像为例，详述扩散膜102对进行指纹识别时的光源的光信号成像的影响。图2为扩散膜与指纹识别模组的位置示意图一；图3为扩散膜与指纹识别模组的位置示意图二。如图2和图3所示，图2和图3分别示出了在扩散膜102与指纹识别模组301不同的位置时光信号的方向，当手指接触面板201时，面板201上的指纹图像贯穿背光模组10至指纹识别模组30，在指纹识别模组30进行识别。其中，在背光模组10、面板201和指纹识别模组30之间之间的位置固定时，图2中扩散膜102与指纹识别模组301之间的距离大于图3中扩散膜102与指纹识别模组301之间的距离。从图2和图3中可以看出，当扩散膜102与指纹识别模组301之间的距离缩短时，扩散膜102可以降低光信号扩散的范围，减小信号之间交叠的影响，使指纹图像更加清晰。因此，在指纹识别时，背光模组10中导光板101、扩散膜102和反射膜103之间的相对位置决定了指纹图像的清晰度，在背光模组10中，将扩散膜102设置在背离面板201的一侧，即扩散膜102靠近指纹识别模组30，在进行指纹识别时，能提高指纹图像的清晰度。
当手指接触面板201时，进行指纹识别的光源的光线反射向面板201的表面，来自面板201的表面的指纹图像的光信号依次贯穿导光板101、扩散膜102 和反射膜103，进入指纹识别模组30内，最终形成指纹图像来进行识别。
本申请实施例提供的背光模组，通过设置可透光结构，可透光结构用于使背光模组10的靠近面板201一侧的光线贯穿至背光模组10另一侧的指纹识别模组30。可透光结构包括层叠设置的导光板101、扩散膜102和反射膜103，将扩散膜102设置在背离面板201的一侧，即扩散膜102靠近指纹识别模组30，这样，在进行指纹识别时，能提高指纹图像的清晰度。
进一步的，本申请实施例提供的背光模组，还包括和可透光结构层叠设置的不可透光结构，不可透光结构上具有透光孔。具体的，光线通过透光孔进入指纹识别模组30。在具体实现时，透光孔的面积等于或者大于指纹识别模组30中指纹识别区域的面积，以使面板201上的指纹图像能完整的贯穿背光模组10至指纹识别模组30的指纹识别区域内。
在具体实现时，不可透光结构包括补强板104，补强板104位于反射膜103的背离面板201的一侧。
具体的，补强板104也可称为遮光板，在补强板104上设置透光孔，光线通过透光孔进入指纹识别模组30，补强板104其余不透光部分用于遮光或反射光线。可选的，补强板104采用钢板，补强板104的厚度为0.09～0.11mm。具体的，补强板104的厚度为0.1mm。
补强板104也可以采用其它用于遮光的材质，比如，黑白胶。本实施例在此不作限定。
图4为本申请实施例提供的一种背光模组中棱镜膜的结构示意图。如图4所示，本申请实施例提供的背光模组，还包括棱镜膜105，棱镜膜105位于导光板101上，棱镜膜104和扩散膜102分别位于导光板101的相对两侧。
棱镜膜105用于增加面板201的亮度，具体的，棱镜膜105改善光的角分布，将从扩散膜102射出的均匀地向各个角度发散的光汇聚到轴向角度上，也就是面板201的正视角度上，在不增加出射总光通量的情况下提高轴向亮度。
棱镜膜105的厚度为0.09～0.11mm。具体的，棱镜膜105的厚度为0.1mm。
图5为现有技术中一种棱镜膜对光线的折射图。如图5所示，现有技术中，棱镜膜105上具有多个棱镜体1051，棱镜体1051朝向面板201的尖角1052为90°。在指纹识别时，用于指纹识别的光线经面板201进入背光模组 10内，入射光1054的入射角1053大于90°才能使小角度的光通过棱镜膜105，因此，小角度的光线无法经过棱镜膜105进入指纹识别模组30中，导致指纹图像中心区域呈现图像被分割的成像结果。也就是说，尖角1052为90°时，需要入射光1054基本达到90°，才能经过折射(光疏介质进入光密介质)，形成小角度的光(垂直于棱镜体1051的下表面，不产生较大折射，从而保持小角度到达指纹识别模组30)。在尖角1052为90°的棱镜膜，没有90°的光射到棱镜体1051的下表面上。
图6为为本申请实施例提供的一种背光模组中棱镜膜对光线的折射图。如图6所示，具体的，本申请实施例提供的背光模组，棱镜膜105上具有多个棱镜体1051，棱镜体1051朝向面板201的尖角1052为钝角。将棱镜体1051朝向面板201的尖角1052设置为钝角。这样，入射光1054的入射角1053小于90°也能使小角度的光通过棱镜膜105，不产生较大折射。在指纹识别时，能够在指纹识别模组30中成像区域更多，能获取更大的可用视场范围，提升指纹识别的性能。
进一步的，棱镜体1051朝向面板201的尖角1052的角度为100～160°。
可选的，棱镜体1051朝向面板201的尖角1052的角度为120°，此时指纹成像质量最好。
作为一种可选的方式，本申请实施例提供的背光模组，棱镜膜105上还具有偏光层1053，偏光层1053和棱镜体1051分别位于棱镜膜105相对的两侧。
具体的，偏光层1053用于形成偏振光，增加面板201的亮度。偏光层1053的材质可以为聚乙烯醇(PVA)；偏光层1053上也可以设置用于保护偏光层1053的保护层，保护层的材质为三醋酸纤维素(TAC)。当然，偏光层1053也可选用其他具有相同功能的材料，保护层也可选用其他适宜的具有保护功能的材料。
本申请实施例提供的背光模组的也可以用在人脸识别中，人脸识别原理和上述实施例中指纹识别的原理相同，本实施例在此不作限定。
图7为本申请实施例提供的一种液晶模组的结构示意图。如图7所示，本申请实施例还提供一种液晶模组20，其中，液晶模组20包括面板201和上述的背光模组10。
具体的，面板201包括第一基板202、第二基板203、液晶分子层204；
第一基板202与第二基板203平行，液晶分子层204位于第一基板202和第二基板203之间，背光模组10位于第二基板203下方。
其中，背光模组10的结构在上述实施例中进行了详细说明，在此不一一赘述。
面板201的厚度为1.1～1.3mm，可选的，面板201的厚度为1.2mm。
进一步的，本申请实施例提供的液晶模组20，还包括第一光源(图中未示出)，第一光源用于照亮面板201。
具体的，第一光源可以为LED背光源，LED背光源的使用寿命长。具体的，LED背光源可以采用LED灯条。第一光源可以位于背光模组10的侧面，以侧面入光的形式照亮面板201，即侧入式背光源。第一光源也可以位于补强板104上，以垂直入光的形式照亮面板201，即直下式背光源。对于第一光源的位置，本实施例在此不作限定。
图8为本申请实施例提供的一种指纹识别装置的结构示意图。如图8所示，本申请实施例提供一种指纹识别装置30，指纹识别装置30包括指纹识别模组301和上述的液晶模组20，指纹识别模组301包括指纹识别芯片3011、光学镜头3012，光学镜头3012位于指纹识别芯片3011和液晶模组20之间。
其中，液晶模组20的结构在上述实施例中进行了详细说明，在此不一一赘述。
具体的，指纹识别芯片3011用于识别来自面板201的表面的指纹图像的光信号。
当手指接触面板201时，进行指纹识别的光源的光线反射向面板201的表面，来自面板201的表面的指纹图像的光信号依次贯穿导光板101、扩散膜102和反射膜103，在经光学镜头3012进入指纹识别模组30内的纹识别芯片3011上，通过指纹识别芯片3011识别来自面板201的表面的指纹图像的光信号。
进一步的，本申请实施例提供的指纹识别装置30，还包括第二光源302，第二光源302用于使面板201反射指纹图像。
可选的，第二光源302为红外光源。
进一步的，本申请实施例提供的指纹识别装置，第二光源302光源的入 射方向与液晶模组20的面板201具有夹角。也就是说，第二光源302光源倾斜进入面板201，这样，增加了第二光源302使面板201反射的指纹图像的面积。
第二光源302的位置可以为以下两种实现方式：
在一种可能的实现方式中，本申请实施例提供的指纹识别装置，第二光源302光源位于面板201的侧方。
在另一种可能的实现方式中，本申请实施例提供的指纹识别装置，第二光源302位于面板201的下方。在具体实现时，面板201的第一侧与背光模组10的第一侧平齐，面板201相对的第一侧和第二侧之间的距离大于背光模组相对的第一侧和第二侧之间的距离。即在图8中，在一个方向上，面板201的长度大于背光模组10的长度，即面板201部分与背光模组10重叠，第二光源302位于面板201未与与背光模组10重叠的下方。
具体的，液晶模组20中扩散膜102与第一基板202之间的距离为1.63～1.68mm。该距离范围内，在进行指纹识别时，能提高指纹图像的清晰度。
图9为本申请实施例提供的一种移动终端的结构示意图。如图9所示，在上述各实施例的基础上，本申请实施例提供一种移动终端40，移动终端40包括上述的指纹识别装置30。
其中，指纹识别装置30的结构在上述实施例中进行了详细说明，在此不一一赘述。
其中，该移动终端40可以为液晶模组、电子纸、有机发光二极管(Organic Light-Emitting Diode，OLED)面板、手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪、可穿戴设备或家电设备等任何具有显示功能的产品或部件。
图10为本申请实施例提供的一种指纹识别模组的结构示意图。如图10所示，在上述液晶模组20实施例的基础上，本申请实施例提供一种指纹识别模组60，应用于具有上述的液晶模组20的移动终端50，其中，指纹识别模组60包括指纹识别芯片3011和光学镜头3012，光学镜头3012位于指纹识别芯片3011和液晶模组20之间。
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 (20)

  1. 一种背光模组，其特征在于，包括：可透光结构，所述可透光结构用于使所述背光模组的靠近面板一侧的光线贯穿至所述背光模组另一侧的指纹识别模组，所述可透光结构包括层叠设置的导光板、扩散膜和反射膜，所述扩散膜位于所述导光板和所述反射膜之间且位于背离所述面板的一侧。
  2. 根据权利要求1所述的背光模组，其特征在于，还包括和所述可透光结构层叠设置的不可透光结构，所述不可透光结构上具有透光孔。
  3. 根据权利要求2所述的背光模组，其特征在于，所述不可透光结构包括补强板，所述补强板位于所述反射膜的背离所述面板的一侧。
  4. 根据权利要求1所述的背光模组，其特征在于，还包括棱镜膜，所述棱镜膜位于所述导光板上，所述棱镜膜和所述扩散膜分别位于所述导光板的相对两侧。
  5. 根据权利要求4所述的背光模组，其特征在于，所述棱镜膜上具有多个棱镜体，所述棱镜体朝向所述面板的尖角为钝角。
  6. 根据权利要求5所述的背光模组，其特征在于，所述棱镜体朝向所述面板的尖角的角度为91～175°。
  7. 根据权利要求5所述的背光模组，其特征在于，所述尖角的角度为100°、110°或120°。
  8. 根据权利要求4所述的背光模组，其特征在于，所述棱镜膜上还具有偏光层，所述偏光层和所述棱镜体分别位于所述棱镜膜相对的两侧。
  9. 一种液晶模组，其特征在于，包括面板和权利要求1-8任一项所述的背光模组；
    所述面板包括第一基板、第二基板、液晶分子层；
    所述第一基板与所述第二基板平行，所述液晶分子层位于所述第一基板和所述第二基板之间，所述背光模组位于所述第二基板下方。
  10. 根据权利要求9所述的液晶模组，其特征在于，还包括第一光源，所述第一光源用于照亮所述面板。
  11. 一种指纹识别装置，其特征在于，包括指纹识别模组和权利要求9或10所述的液晶模组，所述指纹识别模组包括指纹识别芯片、光学镜头，所述光学镜头位于所述指纹识别芯片和所述液晶模组之间。
  12. 根据权利要求11所述的指纹识别装置，其特征在于，还包括第二光源，所述第二光源用于使所述面板反射指纹图像。
  13. 根据权利要求11所述的指纹识别装置，其特征在于，所述液晶模组中所述扩散膜与所述第一基板之间的距离为1.63～1.68mm。
  14. 根据权利要求12所述的指纹识别装置，其特征在于，所述第二光源光源的入射方向与所述液晶模组的面板具有夹角。
  15. 根据权利要求12所述的指纹识别装置，其特征在于，所述第二光源光源位于所述面板的侧方。
  16. 根据权利要求12所述的指纹识别装置，其特征在于，所述第二光源光源位于所述面板的下方。
  17. 根据权利要求16所述的指纹识别装置，其特征在于，所述面板相对的第一侧和第二侧之间的距离大于所述背光模组相对的第一侧和第二侧之间的距离，所述面板的第一侧与所述背光模组的第一侧平齐。
  18. 根据权利要求12所述的指纹识别装置，其特征在于，所述第二光源为红外光源。
  19. 一种移动终端，其特征在于，包括权利要求11-18任一项所述的指纹识别装置。
  20. 一种指纹识别模组，其特征在于，应用于具有权利要求9或10所述的液晶模组的移动终端，其中，所述指纹识别模组包括指纹识别芯片和光学镜头，所述光学镜头位于所述指纹识别芯片和所述液晶模组之间。
PCT/CN2018/119149 2018-12-04 2018-12-04 背光模组、液晶模组、指纹识别装置和模组、移动终端 WO2020113415A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201880002695.3A CN109690372A (zh) 2018-12-04 2018-12-04 背光模组、液晶模组、指纹识别装置和模组、移动终端
PCT/CN2018/119149 WO2020113415A1 (zh) 2018-12-04 2018-12-04 背光模组、液晶模组、指纹识别装置和模组、移动终端

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/119149 WO2020113415A1 (zh) 2018-12-04 2018-12-04 背光模组、液晶模组、指纹识别装置和模组、移动终端

Publications (1)

Publication Number Publication Date
WO2020113415A1 true WO2020113415A1 (zh) 2020-06-11

Family

ID=66191832

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/119149 WO2020113415A1 (zh) 2018-12-04 2018-12-04 背光模组、液晶模组、指纹识别装置和模组、移动终端

Country Status (2)

Country Link
CN (1) CN109690372A (zh)
WO (1) WO2020113415A1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113745391A (zh) * 2021-08-26 2021-12-03 厦门天马微电子有限公司 一种显示面板和显示装置
CN114442376A (zh) * 2022-02-22 2022-05-06 四川长虹电器股份有限公司 一种侧入式超窄第四边液晶模组
CN114792491A (zh) * 2021-01-26 2022-07-26 深圳市柔宇科技股份有限公司 可折叠显示模组及可折叠显示设备

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111860065A (zh) * 2019-04-30 2020-10-30 深圳市隆利科技股份有限公司 一种指纹识别模组
CN110308586A (zh) * 2019-06-28 2019-10-08 深圳市隆利科技股份有限公司 背光模组及电子设备
US10936847B1 (en) 2019-09-20 2021-03-02 Shenzhen GOODIX Technology Co., Ltd. Under-display optical sensor with compensated light paths
CN111062017A (zh) * 2019-11-04 2020-04-24 Oppo广东移动通信有限公司 一种指纹模组和终端
CN113569601A (zh) * 2020-04-28 2021-10-29 华为技术有限公司 屏下指纹识别系统及电子设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101464580A (zh) * 2007-12-19 2009-06-24 索尼株式会社 显示装置和照明装置
US20120032920A1 (en) * 2010-08-05 2012-02-09 Chih-Wei Chien Optical plate structure for a touch panel, and touch display panel and touch liquid crystal display panel including the same
CN107832752A (zh) * 2017-12-15 2018-03-23 京东方科技集团股份有限公司 指纹识别面板、全屏指纹识别方法及显示装置
CN208173153U (zh) * 2018-05-11 2018-11-30 印象认知（北京）科技有限公司 一种显示屏及电子设备

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102418802B1 (ko) * 2017-05-02 2022-07-11 엘지디스플레이 주식회사 표시장치
CN108683756B (zh) * 2018-04-20 2019-07-23 Oppo广东移动通信有限公司 指纹识别组件、显示装置及电子装置
CN209543017U (zh) * 2018-12-04 2019-10-25 深圳市汇顶科技股份有限公司 背光模组、液晶模组、指纹识别装置和模组、移动终端

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101464580A (zh) * 2007-12-19 2009-06-24 索尼株式会社 显示装置和照明装置
US20120032920A1 (en) * 2010-08-05 2012-02-09 Chih-Wei Chien Optical plate structure for a touch panel, and touch display panel and touch liquid crystal display panel including the same
CN107832752A (zh) * 2017-12-15 2018-03-23 京东方科技集团股份有限公司 指纹识别面板、全屏指纹识别方法及显示装置
CN208173153U (zh) * 2018-05-11 2018-11-30 印象认知（北京）科技有限公司 一种显示屏及电子设备

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114792491A (zh) * 2021-01-26 2022-07-26 深圳市柔宇科技股份有限公司 可折叠显示模组及可折叠显示设备
CN113745391A (zh) * 2021-08-26 2021-12-03 厦门天马微电子有限公司 一种显示面板和显示装置
CN113745391B (zh) * 2021-08-26 2022-10-14 厦门天马微电子有限公司 一种显示面板和显示装置
CN114442376A (zh) * 2022-02-22 2022-05-06 四川长虹电器股份有限公司 一种侧入式超窄第四边液晶模组

Also Published As

Publication number Publication date
CN109690372A (zh) 2019-04-26

Similar Documents

Publication Publication Date Title
WO2020113415A1 (zh) 背光模组、液晶模组、指纹识别装置和模组、移动终端
TWI664580B (zh) 顯示幕、顯示裝置及行動終端
WO2020037991A1 (zh) 屏下光学指纹识别系统及电子装置
US11194088B2 (en) Fill-in light unit, display screen, display apparatus, and terminal
US20100053118A1 (en) Display module
US20150346856A1 (en) Touch-sensing lcd panel
CN101034332A (zh) 具有触控输入功能的显示装置
CN110928038A (zh) 一种背光模组、显示装置及液晶电视
US9086761B2 (en) Display apparatus
CN210835532U (zh) 反射式显示屏及反射式显示装置
CN109325384B (zh) 内嵌式光学指纹辨识显示设备
US20200184181A1 (en) Liquid crystal display device having fingerprint sensor
WO2021087652A1 (zh) 液晶显示屏指纹识别系统、电子装置及指纹识别模组
CN102736315A (zh) 一种彩膜基板和显示装置
US20170059764A1 (en) Light guide plate, backlight unit and display device
WO2022267141A1 (zh) 显示模组
US10067366B2 (en) Full lamination structure of a liquid crystal molecule
TWI729951B (zh) 電子裝置
KR20160147914A (ko) 도광판, 액정 디스플레이 모듈, 및 단말 디바이스
US20210396912A1 (en) Optical film layer and display device
CN110909720B (zh) 一种彩膜基板、显示面板及显示装置
US20080158476A1 (en) Optical member, backlight unit and display apparatus having the same
CN209543017U (zh) 背光模组、液晶模组、指纹识别装置和模组、移动终端
KR20140002390A (ko) 액정표시장치
JP2006309136A (ja) 電気光学装置及びこの電気光学装置を備えた電子機器

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: 18942642

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: 18942642

Country of ref document: EP

Kind code of ref document: A1