WO2021119923A1 - 显示模组及显示装置 - Google Patents

显示模组及显示装置 Download PDF

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Publication number
WO2021119923A1
WO2021119923A1 PCT/CN2019/125658 CN2019125658W WO2021119923A1 WO 2021119923 A1 WO2021119923 A1 WO 2021119923A1 CN 2019125658 W CN2019125658 W CN 2019125658W WO 2021119923 A1 WO2021119923 A1 WO 2021119923A1
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WO
WIPO (PCT)
Prior art keywords
light
liquid crystal
module
light source
cover plate
Prior art date
Application number
PCT/CN2019/125658
Other languages
English (en)
French (fr)
Inventor
张健
郑财
赵婷婷
范利涛
禹映雪
周锦钊
辛秦
Original Assignee
京东方科技集团股份有限公司
北京京东方光电科技有限公司
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 京东方科技集团股份有限公司, 北京京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US16/977,490 priority Critical patent/US11734945B2/en
Priority to JP2021570432A priority patent/JP7460659B2/ja
Priority to EP19945398.6A priority patent/EP4080403A4/en
Priority to PCT/CN2019/125658 priority patent/WO2021119923A1/zh
Priority to CN201980003042.1A priority patent/CN113412488A/zh
Publication of WO2021119923A1 publication Critical patent/WO2021119923A1/zh

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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
    • 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/12—Details of acquisition arrangements; Constructional details thereof
    • G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/143—Sensing or illuminating at different wavelengths
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/12—Details of acquisition arrangements; Constructional details thereof
    • G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/147—Details of sensors, e.g. sensor lenses
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/40—Extraction of image or video features
    • G06V10/54—Extraction of image or video features relating to texture
    • 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
    • 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
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133331—Cover glasses

Definitions

  • This application relates to the field of display technology, and in particular to a display module and a display device.
  • under-screen fingerprint recognition technology in mobile display devices can increase the use functions of the mobile display device and also help increase the screen-to-body ratio of the mobile display device.
  • a display module includes: a liquid crystal module, a cover plate, and a pattern recognition unit.
  • the pattern recognition unit includes a first light source and a pattern sensing module.
  • the first light source is located on a side of the cover plate close to the liquid crystal module, and is configured to emit invisible light.
  • the texture sensing module is located on a side of the liquid crystal module away from the cover plate.
  • the allowable light wavelength range of the cover plate and the liquid crystal module includes the light wavelength range of the invisible light.
  • the pattern sensing module is configured to collect the reflected light after the invisible light is irradiated on the target, so as to identify the pattern of the target.
  • the display module further includes an edge-type backlight module.
  • the edge-lit backlight module includes: a second light source, a light guide plate, a reflective sheet and at least one optical film.
  • the light guide plate is located on a side of the liquid crystal module away from the cover plate.
  • the second light source is located on the side surface of the light guide plate and is configured to emit visible light.
  • the at least one optical film is located on a side of the light guide plate close to the liquid crystal module, and the wavelength range of light that it allows to pass includes the wavelength range of the invisible light and the wavelength range of the visible light.
  • the reflective sheet is located on a side of the light guide plate away from the liquid crystal module, and is configured to reflect the visible light and transmit the invisible light.
  • the texture sensing module is located on the side of the reflective sheet away from the light guide plate.
  • the liquid crystal module has a display area.
  • the orthographic projection of the first light source and the second light source on the cover plate is located outside the same side boundary of the orthographic projection of the display area on the cover plate in a direction parallel to the cover plate.
  • the edge-lit backlight module further includes a backplane.
  • the back plate is located on the side of the reflective sheet close to the grain sensing module.
  • the portion of the backplane opposite to the grain sensing module is provided with an opening, and the opening allows the reflected light after the invisible light is irradiated on the target to pass through and irradiate the grain sensing module.
  • the liquid crystal module has a display area.
  • the orthographic projection of the opening on the cover plate is located in the orthographic projection of the display area on the cover plate.
  • the liquid crystal module includes a chip on film.
  • the first light source is arranged on the surface of the chip on film close to the cover plate, and is electrically connected to the chip on film.
  • the display module further includes a printed circuit board.
  • the printed circuit board is located on a side of the liquid crystal module away from the cover plate, and is electrically connected to the flip chip film.
  • the display module further includes a packaging frame hermetically connected to the cover plate.
  • the packaging frame includes a containing groove.
  • the liquid crystal module and the pattern recognition unit are respectively located in the accommodating groove.
  • the texture sensing module is arranged on the bottom surface of the accommodating groove, and the first light source is arranged on the inner side of the accommodating groove.
  • the light-emitting surface of the first light source intersects the surface of the cover plate close to the liquid crystal module.
  • the accommodating groove is configured to provide an included angle between the inner side surface of the first light source and the bottom surface of the groove, and the included angle is an obtuse angle.
  • the light-emitting surface of the first light source is perpendicular or substantially perpendicular to the surface of the cover plate close to the liquid crystal module.
  • the accommodating groove is configured to set the inner side surface of the first light source as a stepped surface.
  • the first light source is located on a plane of the step surface parallel to the bottom surface of the groove, and the light emitting surface of the first light source is parallel to the surface of the cover plate close to the liquid crystal module.
  • the first light source is glued to the surface of the cover plate close to the liquid crystal module.
  • the first light source includes a flexible circuit board carrier and at least one invisible light lamp.
  • the at least one invisible light lamp is arranged on the flexible circuit board carrier and is electrically connected to the flexible circuit board carrier.
  • the display module further includes a printed circuit board.
  • the printed circuit board is located on a side of the liquid crystal module away from the cover plate, and is electrically connected to the texture sensor module.
  • a display device in another aspect, includes the display module as described in some of the above embodiments.
  • Fig. 1 is a structural diagram of a display module according to some embodiments of the present disclosure
  • Figure 2 is a structural diagram of another display module according to some embodiments of the present disclosure.
  • FIG. 3 is a structural diagram of another display module according to some embodiments of the present disclosure.
  • Fig. 4 is a schematic diagram of an effective light exit angle of a first light source according to some embodiments of the present disclosure
  • FIG. 5 is a structural diagram of still another display module according to some embodiments of the present disclosure.
  • Fig. 6 is a schematic diagram of an effective light exit angle of another first light source according to some embodiments of the present disclosure.
  • FIG. 7 is a structural diagram of still another display module according to some embodiments of the present disclosure.
  • Fig. 8 is a schematic diagram of an effective light exit angle of another first light source according to some embodiments of the present disclosure.
  • FIG. 9 is a structural diagram of still another display module according to some embodiments of the present disclosure.
  • Fig. 10 is a structural diagram of a first light source according to some embodiments of the present disclosure.
  • FIG. 11 is a structural diagram of a grain sensing module according to some embodiments of the present disclosure.
  • Fig. 12 is a connection diagram of a first light source and a pattern sensing module according to some embodiments of the present disclosure
  • FIG. 13 is a schematic diagram of a display device according to some embodiments of the present disclosure.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features. In the description of the embodiments of the present disclosure, unless otherwise specified, “plurality” means two or more.
  • liquid crystal display devices represented by liquid crystal displays (LCD) have occupied a certain position in the display field due to their advantages of lightness and thinness, low power consumption, no radiation, good color purity, and high contrast.
  • the display device with a high screen-to-body ratio has become one of the more popular products among consumers due to its unique appearance. Therefore, the use of under-screen fingerprint recognition technology in the liquid crystal display device can not only increase the use function of the liquid crystal display device, but also help increase the screen-to-body ratio of the liquid crystal display device.
  • some embodiments of the present disclosure provide a display module to be applied to a liquid crystal display device, so as to realize the under-screen pattern recognition of the liquid crystal display device.
  • the display module 100 includes a cover plate 10, a liquid crystal module 20, a backlight module 30, and a pattern recognition unit arranged in sequence.
  • the pattern recognition unit includes a first light source 41 and a pattern sensing module 42.
  • the above-mentioned first light source 41 is located on the side of the cover plate 10 close to the liquid crystal module 20 and is configured to emit invisible light.
  • the first light source 41 is an infrared light source.
  • the cover plate 10 is located on the side of the liquid crystal module 20 away from the backlight module 30.
  • the cover plate 10 is a light-transmitting cover plate, and the allowable light wavelength range includes the light wavelength range of the invisible light emitted by the first light source 41 and the visible light wavelength range provided by the backlight module 30.
  • the cover plate 10 is transparent glass capable of transmitting invisible light.
  • the above-mentioned liquid crystal module 20 includes an array substrate 21, a counter substrate 23, and a liquid crystal layer 22 disposed between the array substrate 21 and the counter substrate 23.
  • the array substrate 21 and the counter substrate 23 are paired with the frame sealant to confine the liquid crystal layer 22 in the area enclosed by the frame sealant.
  • the counter substrate 23 is a color filter substrate.
  • the counter substrate 23 is located on a side of the array substrate 21 close to the cover plate 10.
  • the liquid crystal module 20 further includes an upper polarizing layer 24 on the side of the opposite substrate 23 close to the cover plate 10 and a lower polarizing layer 25 on the array substrate 21 close to the backlight module 30.
  • the wavelength range of visible light is 380 nm to 780 nm
  • the wavelength range of invisible light is quite different from that of visible light.
  • the wavelength range of the light is greater than 850 nm. Therefore, the upper polarizing layer 24 and the lower polarizing layer 25 in the liquid crystal module 20 can only polarize visible light, and basically not cause light loss to invisible light.
  • the structure of the liquid crystal module 20 is not limited to this, and some of the following embodiments are only schematic illustrations based on the liquid crystal module 20 adopting the structure as an example.
  • the liquid crystal module 20 may be an FFS (Fringe Field Switching) type liquid crystal module, an IPS (In Plane Switch, lateral electric field effect) type liquid crystal module, or a TN (Twist Nematic, twisted nematic) type liquid crystal module. Any one of the group.
  • the aforementioned backlight module 30 is configured to provide a display light signal to the liquid crystal module 20.
  • the backlight module 30 is an edge-type backlight module, and the edge-type backlight module includes a second light source 31, a light guide plate 32, a reflective sheet 33, and at least one optical film.
  • the light guide plate 32 is located on the side of the liquid crystal module 20 away from the cover plate 10.
  • the second light source 31 is located on the side of the light guide plate 32 and is configured to emit visible light.
  • the second light source 31 is a light-emitting diode (Light-Emitting Diode, LED) light bar, which includes at least one LED.
  • the at least one optical film is located on the side of the light guide plate 32 close to the liquid crystal module 20, and the wavelength range of light that it allows to pass includes the wavelength range of the invisible light emitted by the first light source 41 and the visible light emitted by the second light source 31 The wavelength range of light.
  • the at least one optical film is a two-layer optical film, and the two-layer optical film includes a diffusion film 34 and a composite brightness enhancement film 35 stacked on the side of the light guide plate 32 close to the liquid crystal module 20 in sequence.
  • the materials of the diffusion film 34 and the composite brightness enhancement film 35 can be selected and set according to actual requirements, and are limited to the fact that they can transmit the invisible light emitted by the first light source 41 and the visible light emitted by the second light source 31.
  • the reflective sheet 33 is located on the side of the light guide plate 32 facing away from the liquid crystal module 20 and is configured to reflect the visible light emitted by the second light source 31 and transmit the invisible light emitted by the first light source 41. That is, the reflective sheet 33 not only has the function of reflecting the visible light emitted by the second light source 31, but also can transmit the invisible light emitted by the first light source 41.
  • the reflector 33 adopts an infrared transmissive reflector, which has a reflectance of visible light from 380 nm to 780 nm close to 100%, and a transmittance of infrared light close to 90%. It can have good infrared transmission characteristics without affecting its visible light reflectivity.
  • the reflected light of the invisible light emitted by the first light source 41 after being irradiated to the target can easily pass through the backlight module 30 without being disturbed, for example, it will not be scattered by the optical film , Is not blocked by the reflective sheet 33, etc., so as to ensure its integrity, so as to achieve accurate identification of the target's texture information.
  • the texture sensor module 42 is located on the side of the liquid crystal module 20 away from the cover plate 10. For example, when the display module 100 adopts the above structure, the texture sensor module 42 is located on the side of the reflective sheet 33 of the backlight module 30 that is away from the light guide plate 32.
  • the pattern sensing module 42 is configured to collect the reflected light after the invisible light emitted by the first light source 41 is irradiated on the target, so as to identify the pattern of the target.
  • the target in some of the foregoing embodiments may be a finger, a palm, or other objects with textures, which are not limited in some embodiments of the present disclosure.
  • the texture sensor module 42 is configured to identify the texture of the target object.
  • the texture sensor module 42 can be a fingerprint sensor module or a palmprint sensor module, etc., which can be selected and set according to actual needs.
  • the texture sensor module 42 is matched with the first light source 41.
  • the first light source 41 is an infrared light source
  • the grain sensor module 42 is a lens-type infrared fingerprint sensor module. 2 and 11, the lens-type infrared fingerprint sensor module includes at least an infrared sensor 422, an infrared lens 423, and a first circuit board 421.
  • the infrared lens 423 is located on the light incident side of the infrared sensor 422, and the infrared sensor 422 is connected to the infrared sensor 422.
  • the first circuit board 421 is electrically connected.
  • the infrared lens 423 can filter light in other wavelength ranges other than infrared light, thereby preventing light in other wavelength ranges from interfering with the optical signal collection of the infrared sensor 422.
  • the display module 100 further includes a printed circuit board (Printed Circuit Boards, PCB board for short) 7
  • the first circuit board 421 may pass board-to-board connectors (Board-to-board Connectors, BTB connector for short) 8 It is electrically connected to the printed circuit board 7.
  • BTB connector for short Board-to-board Connectors
  • reflected light with different light intensities can be formed according to the valleys or ridges in the fingerprint of the finger 01.
  • the liquid crystal module 20, and the backlight module 30 in sequence, it can be irradiated into the texture sensor module 42 and collected by the texture sensor module 42 for the purpose of the texture sensor module 42. Based on the reflected light, a bright and dark texture image is formed.
  • the first light source 41 is located on the side of the cover plate 10 close to the liquid crystal module 20, so that the invisible light emitted by the first light source 41 only needs to pass through the backlight from the moment of emission to the process of being collected by the texture sensor module 42
  • the module 30 is used once, so as to prevent the backlight module 30 from interfering with the transmission of the invisible light, and can effectively improve the utilization rate of the invisible light. In turn, a clear fingerprint image can be formed to help improve the success rate of fingerprint recognition.
  • the pattern recognition unit is located under the screen of the display module 100, which is beneficial to increase the screen-to-body ratio of the display module 100.
  • the liquid crystal module 20 has a display area AA and a peripheral area located on at least one side of the display area AA.
  • the orthographic projections of the first light source 41 and the second light source 31 on the cover plate 10 are located outside the same side boundary of the orthographic projection of the display area AA on the cover plate 10 in a direction parallel to the cover plate 10. That is to say, the first light source 41 and the second light source 31 are located on the same side of the liquid crystal module 20 in a direction parallel to the cover plate 10.
  • the invisible light emitted by the first light source 41 and the visible light emitted by the second light source 42 have different wavelength ranges, that is, the invisible light and the visible light will not interfere with each other. Therefore, arranging the first light source 41 and the second light source 31 on the same side of the liquid crystal module 20 along the direction parallel to the cover plate 10 is beneficial to reduce the area of the peripheral area of the display module 100 and further improve the display module. 100 screen-to-body ratio.
  • the above-mentioned backlight module 30 further includes a back plate 36.
  • the back plate 36 is located on the side of the reflective sheet 33 close to the grain sensor module 42 and is configured to carry other components in the backlight module 30, such as the second light source 31, the light guide plate 32, the reflective sheet 33, and so on.
  • the back plate 36 is a metal back plate.
  • the second light source 31 is electrically connected to the printed circuit board 7 on the side of the back plate 36 away from the second light source 31 through the second circuit board 62 (for example, a flexible circuit board).
  • the portion of the back plate 36 opposite to the grain sensor module 42 is provided with an opening 37.
  • the shape and size of the opening 37 can be selected and set according to actual needs, which is not limited in some embodiments of the present disclosure.
  • the orthographic projection of the opening 37 on the cover 10 overlaps or partially overlaps the orthographic projection of the texture sensor module 42 on the cover 10. In this way, the opening 37 allows the invisible light emitted by the first light source 41 to irradiate the reflected light of the target object to pass through, and irradiate the pattern sensing module 42.
  • the orthographic projection of the opening 37 on the cover 10 is within the orthographic projection of the display area AA on the cover 10, which can effectively increase the screen-to-body ratio of the display module 100.
  • the light-emitting angle of the first light source 41 is limited, so the opening 37 in the back plate 36 is arranged close to the first light source 41 in a direction parallel to the cover plate 10, that is, the texture sensor module 42 is arranged parallel to the cover plate 10.
  • the direction of the board 10 is arranged close to the first light source 41, which can ensure that the grain sensor module 42 can receive sufficient reflected light of invisible light.
  • the liquid crystal module 20 includes a chip on flex (chip on flex or chip on film, COF for short) 61.
  • the display module 100 also includes a printed circuit board 7 located on the side of the liquid crystal module 20 away from the cover plate 10.
  • One end of the COF 61 is correspondingly bound to the portion of the array substrate 21 in the liquid crystal module 20 in the peripheral area, and the other end is electrically connected to the printed circuit board 7, and is configured to realize the signal routing between the printed circuit board 7 and the array substrate 21 Signal transmission.
  • the above-mentioned first light source 41 is arranged on the surface of the COF 61 close to the cover plate 10 and is electrically connected to the COF 61.
  • the first light source 41 is welded on the COF 61.
  • the first light source 41 can be electrically connected to the printed circuit board 7 through the COF 61 to simplify the connection circuit or connector required by the first light source 41, which is beneficial to reduce the production cost of the display module 100.
  • the interior of the display module 100 does not need to consider adding an escape space to install the first light source 41, and the structure is simple and easy to manufacture.
  • the first light source 41 and the second light source 31 are correspondingly located on the side of the liquid crystal module 20 where the array substrate 21 is configured to bind the COF 61.
  • the display module 100 further includes a packaging frame 5 that is hermetically connected to the cover plate 10.
  • the packaging frame 5 includes a containing groove, and the liquid crystal module 20 and the pattern recognition unit are respectively located in the containing groove.
  • the texture sensor module 42 is disposed on the bottom surface of the accommodating groove of the package frame 5, and the first light source 41 is disposed on the inner side of the accommodating groove of the package frame 5.
  • the texture sensor module 42 is glued to the bottom surface of the accommodating groove of the package frame 5 by double-sided adhesive or fixing adhesive.
  • the first light source 41 is glued to the inner surface of the accommodating groove of the package frame 5 by double-sided adhesive or fixing adhesive.
  • the first light source 41 includes a flexible circuit board carrier 411 and at least one invisible light lamp 412.
  • the at least one invisible light lamp 412 is disposed on the flexible circuit board carrier 411 and is electrically connected to the flexible circuit board carrier 411.
  • the invisible light lamp 412 adopts an infrared light-emitting diode (Infrared Light-Emitting Diode, IR LED), for example, a top-emitting type IR LED.
  • IR LED Infrared Light-Emitting Diode
  • the invisible light lamps 412 are fixed on the flexible circuit board carrier 411 by welding, and each invisible light lamp 412 is electrically connected to the pattern sensor module 42 through the flexible circuit board carrier 411.
  • the shape of the flexible circuit board carrier 411 can be selected and set according to actual requirements.
  • the flexible circuit board carrier 411 adopts a T-shaped or nearly T-shaped structure.
  • the above-mentioned at least one invisible light lamp 412 is uniformly arranged on the T-shaped top end of the flexible circuit board carrier 411, and the T-shaped bottom end of the flexible circuit board carrier 411 is provided with an electrical connection configured to be electrically connected to the pattern sensor module 42 or the BTB connector. Connecting part 410.
  • the flexible circuit board carrier 411 is glued to the corresponding inner surface of the accommodating groove of the packaging frame 5 by double-sided adhesive or fixing adhesive.
  • the structure of the first light source 41 is not limited to this.
  • the first light source 41 is an invisible light light bar, and the invisible light light bar may be electrically connected to the pattern sensing module 42 through a third circuit board 63 (for example, a flexible circuit board).
  • each component in the above-mentioned texture sensor module 42 can be selected and set according to actual needs.
  • the grain sensor module 42 as a lens-type infrared fingerprint sensor module as an example, as shown in FIG. 11, the infrared sensor 422 and the infrared lens 423 adopt a circular structure, and the first circuit board 421 adopts an I-shaped structure.
  • the first circuit board 421 is provided with a connecting portion 410 on opposite sides of the first circuit board 421.
  • the connecting portion 410 can be used to electrically connect with the BTB connector or the flexible circuit board carrier 411 in the first light source 41.
  • the connection method can be seen in the figure. 12. No more details here.
  • the components electrically connected to the printed circuit board 7, such as the first light source 41, the second light source 42, the pattern sensor module 42, and the array substrate 21, etc., can all exchange data with the printed circuit board 7.
  • the invisible light emitted by the first light source 41 needs to be irradiated on the target to be reflected by the target to form a patterned light signal. Therefore, the light-emitting surface of the first light source 41 can be arranged in various ways with respect to the surface of the cover plate 10.
  • the light-emitting surface of the first light source 41 intersects the surface of the cover plate 10 close to the liquid crystal module 20. That is, there is an angle between the light-emitting surface of the first light source 41 and the surface of the cover plate 10 close to the liquid crystal module 20.
  • the first light source 41 includes a top-emitting IR LED
  • the light-emitting surface of the first light source 41 is the top surface of the IR LED.
  • the accommodating groove of the package frame 5 is configured to provide an included angle ⁇ between the inner side surface of the first light source 41 and the groove bottom surface of the accommodating groove, and the included angle ⁇ is an obtuse angle . That is to say, the accommodating groove of the package frame 5 is configured to set the inner side surface of the first light source 41 as an inclined surface, and after the first light source 41 is fixed on the inner side surface, the light-emitting surface of the first light source 41 is also It is an inclined surface, and the angle between the light-emitting surface of the first light source 41 and the surface of the cover plate 10 close to the liquid crystal module 20 is: ⁇ - ⁇ .
  • the aforementioned included angle ⁇ is related to the light-emitting angle of the invisible light lamp 412 in the first light source 41, but its influencing factors are not limited to this.
  • the thickness of the display module 100, the relative position of the first light source 41 and the pattern sensing module 42, etc. all affect the included angle ⁇ .
  • the light emitting angle of the invisible light lamp 412 in the first light source 41 is 120°
  • the accommodating groove of the package frame 5 is configured to be positioned between the inner side surface of the first light source 41 and the groove bottom surface of the accommodating groove
  • the included angle ⁇ satisfies: 120° ⁇ 150°.
  • the light-emitting angle of the invisible light lamp 412 in the first light source 41 is 140°
  • the accommodating groove of the package frame 5 is configured to be set between the inner side surface of the first light source 41 and the groove bottom surface of the accommodating groove
  • the included angle ⁇ satisfies: 110° ⁇ 160°.
  • the included angle ⁇ is an obtuse angle, as shown in FIG. 4, most of the invisible light emitted by the first light source 41 can be effectively irradiated on the target, such as the finger 01, which is beneficial to improve the utilization rate of the invisible light, thereby Improve the accuracy of the target's pattern recognition.
  • the light-emitting surface of the first light source 41 is perpendicular or substantially perpendicular to the surface of the cover plate 10 close to the liquid crystal module 20, which is also allowed.
  • the first light source 41 includes a top-emitting type IR LED.
  • the top surface of the IR LED is perpendicular or substantially perpendicular to the surface of the cover plate 10 close to the liquid crystal module 20.
  • the IR LED emits
  • the effective light-emitting angle ⁇ of the invisible light that is, the angle that can effectively illuminate the target object such as the finger 01
  • the thickness of the IR LED is very small. This arrangement can effectively reduce the distance from the corresponding edge of the cover plate 10 to the display area AA, that is, it can effectively reduce the peripheral area on the corresponding side of the display module 100, thereby increasing the screen occupancy of the display module 100 ratio.
  • the first light source 41 can be arranged in the display module 100 in other ways.
  • the accommodating groove of the package frame 5 is configured to set the inner surface of the first light source 41 as a stepped surface.
  • the first light source 41 is located on a plane of the step surface of the accommodating groove that is parallel to the bottom surface of the groove, and the light emitting surface of the first light source 41 is parallel to the surface of the cover plate 10 close to the liquid crystal module 20.
  • the first light source 41 includes a top-emitting type IR LED
  • the top surface of the IR LED is parallel to the surface of the cover plate 10 close to the liquid crystal module 20, and the invisible light emitted by the IR LED is
  • the effective light-emitting angle ⁇ is half of the light-emitting angle. In this way, it is convenient to realize the design and manufacture of the display module 100, and is beneficial to improve the production efficiency of the display module 100.
  • the first light source 41 is glued to the surface of the cover plate 10 close to the liquid crystal module 20.
  • the first light source 41 is glued to the cover plate 10 by double-sided adhesive or fixing adhesive. In this way, there is no need to carry out a responsible structural design for the packaging frame 5 of the display module 100. For example, an escape space is reserved on the inner side of the packaging frame 5 to install the first light source 41.
  • the structure is relatively simple and easy to implement.
  • the first light source 41 is glued to the surface of the cover plate 10 close to the liquid crystal module 20, and the first light source 41 is electrically connected to the printed circuit board 7 through the second circuit board 63 (for example, a flexible circuit board).
  • the second circuit board 63 (for example, a flexible circuit board) may be fixed on the inner surface of the package frame 5 corresponding to, for example, glued.
  • the display device 1000 includes the display module 100 as described in some of the above embodiments.
  • the beneficial effects that can be achieved by the display device provided by some embodiments of the present disclosure are the same as the beneficial effects that can be achieved by the display module provided by some of the above embodiments, and will not be repeated here.
  • the above-mentioned display device may be any device that is applied to the display field, whether it is a moving (for example, video) or a fixed (for example, a still image), and whether it is a text or a picture image. More specifically, it is expected that the embodiments can be implemented in a variety of electronic devices, including but not limited to mobile phones, wireless devices, personal data assistants (Portable Android Device, abbreviated as PAD), handheld Or portable computer, GPS (Global Positioning System) receiver/navigator, camera, MP4 (full name MPEG-4 Part 14) video player, camcorder, TV monitor, flat panel display, computer monitor, aesthetics Structure (for example, for a display that displays an image of a piece of jewelry), etc.
  • PDA personal data assistants
  • PAD personal data assistants
  • GPS Global Positioning System
  • MP4 full name MPEG-4 Part 14

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Abstract

一种显示模组（100）和显示装置（1000）。显示模组（100）包括：液晶模组（20）、盖板（10）以及纹路识别单元。纹路识别单元包括第一光源（41）和纹路传感模组（42）。第一光源（41）位于盖板（10）的靠近液晶模组（20）的一侧，且被配置为发射不可见光。纹路传感模组（42）位于液晶模组（20）的背离盖板（10）的一侧。盖板（10）和液晶模组（20）允许透过的光线波长范围包括不可见光的光线波长范围。纹路传感模组（42）被配置为采集不可见光照射至目标物（01）后的反射光，以识别目标物（01）的纹路。

Description

显示模组及显示装置 技术领域
本申请涉及显示技术领域，尤其涉及一种显示模组及显示装置。
背景技术
随着科技的发展，在移动显示装置中采用屏下指纹识别技术，能够增加移动显示装置的使用功能，也利于提高移动显示装置的屏占比。
发明内容
一方面，提供一种显示模组。所述显示模组包括：液晶模组、盖板以及纹路识别单元。所述纹路识别单元包括第一光源和纹路传感模组。所述第一光源位于所述盖板的靠近所述液晶模组的一侧，且被配置为发射不可见光。所述纹路传感模组位于所述液晶模组的背离所述盖板的一侧。所述盖板和所述液晶模组允许透过的光线波长范围包括所述不可见光的光线波长范围。所述纹路传感模组被配置为采集所述不可见光照射至目标物后的反射光，以识别所述目标物的纹路。
在一些实施例中，所述显示模组还包括侧入式背光模组。所述侧入式背光模组包括：第二光源、导光板、反射片和至少一层光学薄膜。所述导光板位于所述液晶模组的背离所述盖板的一侧。所述第二光源位于所述导光板的侧面，被配置为发射可见光。所述至少一层光学薄膜，位于所述导光板的靠近所述液晶模组的一侧，其允许透过的光线波长范围包括所述不可见光的光线波长范围和所述可见光的光线波长范围。所述反射片位于所述导光板的背离所述液晶模组的一侧，被配置为反射所述可见光且透射所述不可见光。所述纹路传感模组位于所述反射片的背离所述导光板的一侧。
在一些实施例中，所述液晶模组具有显示区。所述第一光源与所述第二光源在所述盖板上的正投影，沿平行于所述盖板的方向位于所述显示区在所述盖板上的正投影的同一侧边界外。
在一些实施例中，所述侧入式背光模组还包括背板。所述背板位于所述反射片的靠近所述纹路传感模组的一侧。所述背板与所述纹路传感模组相对的部分设有开口，所述开口允许所述不可见光照射至所述目标物后的反射光穿过并照射至所述纹路传感模组。
在一些实施例中，所述液晶模组具有显示区。所述开口在所述盖板上的正投影位 于所述显示区在所述盖板上的正投影内。
在一些实施例中，所述液晶模组包括覆晶薄膜。所述第一光源设置于所述覆晶薄膜的靠近所述盖板的表面上，且与所述覆晶薄膜电连接。
在一些实施例中，所述显示模组还包括印制电路板。所述印制电路板位于所述液晶模组的背离所述盖板的一侧，且与所述覆晶薄膜电连接。
在一些实施例中，所述显示模组还包括与所述盖板密封连接的封装框。所述封装框包括容置槽。所述液晶模组和所述纹路识别单元分别位于所述容置槽内。所述纹路传感模组设置于所述容置槽的槽底面上，所述第一光源设置于所述容置槽的内侧面上。
在一些实施例中，所述第一光源的出光面与所述盖板的靠近所述液晶模组的表面相交。
在一些实施例中，所述容置槽的配置为设置所述第一光源的内侧面与其槽底面之间具有夹角，所述夹角为钝角。
在一些实施例中，所述第一光源的出光面与所述盖板的靠近所述液晶模组的表面垂直或大略垂直。
在一些实施例中，所述容置槽的配置为设置所述第一光源的内侧面为台阶面。所述第一光源位于所述台阶面的平行于所述槽底面的平面上，且所述第一光源的出光面与所述盖板的靠近所述液晶模组的表面平行。
在一些实施例中，所述第一光源胶接在所述盖板的靠近所述液晶模组的表面上。
在一些实施例中，所述第一光源包括柔性电路板载体和至少一个不可见光灯。所述至少一个不可见光灯设置于所述柔性电路板载体上且与所述柔性电路板载体电连接。
在一些实施例中，所述显示模组还包括印制电路板。所述印制电路板位于所述液晶模组的背离所述盖板的一侧，且与所述纹路传感模组电连接。
又一方面，提供一种显示装置。所述显示装置包括如上一些实施例所述的显示模组。
附图说明
为了更清楚地说明本公开一些实施例中的技术方案，下面将对一些实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，还可以根据这些附图获得其他的附图。
图1为根据本公开一些实施例中的一种显示模组的结构图；
图2为根据本公开一些实施例中的另一种显示模组的结构图；
图3为根据本公开一些实施例中的又一种显示模组的结构图；
图4为根据本公开一些实施例中的一种第一光源的有效出光角的示意图；
图5为根据本公开一些实施例中的又一种显示模组的结构图；
图6为根据本公开一些实施例中的另一种第一光源的有效出光角的示意图；
图7为根据本公开一些实施例中的又一种显示模组的结构图；
图8为根据本公开一些实施例中的又一种第一光源的有效出光角的示意图；
图9为根据本公开一些实施例中的又一种显示模组的结构图；
图10为根据本公开一些实施例中的一种第一光源的结构图；
图11为根据本公开一些实施例中的一种纹路传感模组的结构图；
图12为根据本公开一些实施例中的一种第一光源和纹路传感模组的连接图；
图13为根据本公开一些实施例中的一种显示装置的示意图。
具体实施方式
下面将结合本公开一些实施例中的附图，对本公开一些实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的一些实施例，本领域普通技术人员所能获得的所有其他实施例，都属于本公开保护的范围。
除非上下文另有要求，否则，在整个说明书和权利要求书中，术语“包括(comprise)”及其其他形式例如第三人称单数形式“包括(comprises)”和现在分词形式“包括(comprising)”被解释为开放、包含的意思，即为“包含，但不限于”。在说明书的描述中，术语“一个实施例(one embodiment)”、“一些实施例(some embodiments)”、“示例性实施例(exemplary embodiments)”、“示例(example)”、“特定示例(specific example)”或“一些示例(some examples)”等旨在表明与该实施例或示例相关的特定特征、结构、材料或特性包括在本公开的至少一个实施例或示例中。上述术语的示意性表示不一定是指同一实施例或示例。此外，所述的特定特征、结构、材料或特点可以以任何适当方式包括在任何一个或多个实施例或示例中。
以下，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本公开实施例的描述中，除非另有说明，“多个”的含义是两个或两个以上。
目前，以液晶显示器(Liquid Crystal Display，LCD)为代表的液晶显示装置，因具 有轻薄、功耗低、无辐射、色纯度佳、以及对比度高等优点，已在显示领域占据了一定地位。并且，高屏占比的显示装置因其独特的外观，也成为了较受消费者喜爱的产品之一。因此，在液晶显示装置中采用屏下指纹识别技术，不仅能够增加液晶显示装置的使用功能，也利于提高液晶显示装置的屏占比。
基于此，本公开一些实施例提供了一种显示模组，以应用于液晶显示装置，从而实现液晶显示装置的屏下纹路识别。
请参阅图1～图9，所述显示模组100包括依次设置的盖板10、液晶模组20、背光模组30以及纹路识别单元。所述纹路识别单元包括第一光源41和纹路传感模组42。
上述第一光源41位于盖板10的靠近液晶模组20的一侧，且被配置为发射不可见光。可选的，第一光源41为红外光源。
上述盖板10位于液晶模组20的背离背光模组30的一侧。盖板10为透光盖板，其允许透过的光线波长范围包括第一光源41发射的不可见光的光线波长范围，以及背光模组30提供的可见光的光线波长范围。可选的，盖板10为能够透射不可见光的透明玻璃。
上述液晶模组20包括阵列基板21、对置基板23、设置于阵列基板21和对置基板23之间的液晶层22。阵列基板21和对置基板23通过封框胶对盒，将液晶层22限定在封框胶所围成的区域内。可选的，当彩色滤光层设置于对置基板23上时，对置基板23为彩膜基板。
在一些示例中，对置基板23位于阵列基板21的靠近盖板10的一侧。液晶模组20还包括位于对置基板23的靠近盖板10一侧的上偏光层24，以及位于阵列基板21的靠近背光模组30的下偏光层25。可以理解的是，可见光的光线波长范围为380nm～780nm，不可见光的光线波长范围与可见光存在较大差别。例如不可见光为红外光时，其光线波长范围大于850nm。由此，液晶模组20中的上偏光层24和下偏光层25只会对可见光进行偏振，基本不会对不可见光造成光损。
当然，液晶模组20的结构并不仅限于此，以下的一些实施例仅是以液晶模组20采用所述结构为例进行的示意性说明。此外，液晶模组20可以为FFS(Fringe Field Switching，边缘场开关)型液晶模组、IPS(In Plane Switch，横向电场效应)型液晶模组、TN(Twist Nematic，扭曲向列)型液晶模组中的任一种。
上述背光模组30配置为向液晶模组20提供显示光信号。在一些示例中，背光模组30为侧入式背光模组，该侧入式背光模组包括第二光源31、导光板32、反射片33 和至少一层光学薄膜。
如图2所示，导光板32位于液晶模组20的背离盖板10的一侧。第二光源31位于导光板32的侧面，被配置为发射可见光。可选的，第二光源31为发光二极管(Light-Emitting Diode，LED)灯条，其包括至少一个LED。
所述至少一层光学薄膜位于导光板32的靠近液晶模组20的一侧，其允许透过的光线波长范围包括第一光源41发射的不可见光的光线波长范围和第二光源31发射的可见光的光线波长范围。可选的，所述至少一层光学薄膜为两层光学薄膜，所述两层光学薄膜包括依次层叠设置在导光板32的靠近液晶模组20一侧的扩散膜34和复合增亮膜35。此处，扩散膜34和复合增亮膜35的材料可以根据实际需求选择设置，以其能够透射第一光源41发射的不可见光和第二光源31发射的可见光为限。
反射片33位于导光板32的背离液晶模组20的一侧，被配置为反射第二光源31发射的可见光，且透射第一光源41发射的不可见光。也即，反射片33不仅具有对第二光源31发射的可见光进行反射的功能，还能够对第一光源41发射的不可见光进行透射。可选的，在第一光源41为红外光源的情况下，反射片33采用红外透射反射片，其对380nm～780nm的可见光的反射率接近100％，其对红外光的透射率接近90％，能够在不影响其可见光反射性的情况下，具有良好的红外透射特性。
当背光模组30采用如上结构时，第一光源41发射的不可见光在照射至目标物后的反射光，能够容易的穿过背光模组30而几乎不受干扰，例如不会被光学薄膜散射、不被反射片33阻挡等，从而确保其完整度，以实现目标物的纹路信息的精准识别。
纹路传感模组42位于液晶模组20的背离盖板10的一侧。示例的，在显示模组100采用如上结构的情况下，纹路传感模组42位于背光模组30中反射片33的背离导光板32的一侧。纹路传感模组42被配置为采集第一光源41发射的不可见光照射至目标物后的反射光，以识别目标物的纹路。
可以理解的是，上述一些实施例中的目标物可以为手指、手掌或其他具有纹路的物体，本公开一些实施例对此不做限定。纹路传感模组42被配置为识别目标物的纹路，纹路传感模组42可以为指纹传感模组或掌纹传感模组等，具体根据实际需求选择设置即可。
以下以目标物为手指01，纹路传感模组42为指纹传感模组为例进行示意性的说明。
纹路传感模组42与第一光源41匹配设置。在一些示例中，第一光源41为红外光 源，纹路传感模组42为透镜式红外指纹传感模组。请参阅图2和图11，透镜式红外指纹传感模组至少包括红外传感器422、红外透镜423以及第一电路板421，其中，红外透镜423位于红外传感器422的入光侧，红外传感器422与第一电路板421电连接。红外透镜423能够过滤红外光以外其他波长范围内的光线，从而避免其他波长范围内的光线对红外传感器422的光信号采集产生干扰。在显示模组100还包括印刷电路板(Printed Circuit Boards，简称PCB板)7的情况下，第一电路板421可以通过板对板连接器(Board-to-board Connectors，简称BTB连接器)8与印刷电路板7电连接。如此，利用透镜式红外指纹传感模组，能够有效实现单点指纹识别，且具备成本低、模组体积小、以及灵敏性高的优势。
在本公开实施例中，第一光源41发射的不可见光在透过盖板10照射至手指01后，能够根据手指01指纹中的谷或脊分别形成具有不同光强的反射光。当该反射光依次透过盖板10、液晶模组20和背光模组30之后，能够照射至纹路传感模组42中，从而被纹路传感模组42采集，以便纹路传感模组42根据该反射光形成明暗相间的纹路图像。第一光源41位于盖板10的靠近液晶模组20的一侧，这样第一光源41发射的不可见光在从出射开始至其被纹路传感模组42采集的过程中，只需透过背光模组30一次，从而避免背光模组30对所述不可见光的传输产生干扰，能够有效提高所述不可见光的利用率。进而可以形成清晰的指纹图像，以利于提高指纹识别的成功率。此外，在本公开实施例中，纹路识别单元位于显示模组100的屏下，有利于提高显示模组100的屏占比。
在一些实施例中，请参阅图2、图3、图5、图7和图9，液晶模组20具有显示区AA以及位于显示区AA至少一侧的周边区域。第一光源41与第二光源31在盖板10上的正投影，沿平行于盖板10的方向位于显示区AA在盖板10上的正投影的同一侧边界外。这也就是说，第一光源41和第二光源31位于液晶模组20的沿平行于盖板10方向的同一侧。
此处，第一光源41发射的不可见光和第二光源42发射的可见光，二者的光线波长范围不同，也即该不可见光和该可见光不会互相干扰。因此，将第一光源41和第二光源31设置于液晶模组20的沿平行于盖板10方向的同一侧，有利于减小显示模组100的周边区域的面积，以进一步提高显示模组100的屏占比。
在一些实施例中，请继续参阅图2、图3、图5、图7和图9，上述背光模组30还包括背板36。背板36位于反射片33的靠近纹路传感模组42的一侧，被配置为承 载背光模组30中的其他组成部分，例如第二光源31、导光板32、反射片33等。
可选的，背板36为金属背板。第二光源31通过第二电路板62(例如柔性电路板)与位于背板36的背离第二光源31一侧的印刷电路板7电连接。
上述背板36与纹路传感模组42相对的部分设有开口37。开口37的形状以及大小可以根据实际需求选择设置，本公开一些实施例对此不作限定。可选的，开口37在盖板10上的正投影与纹路传感模组42在盖板10上的正投影重叠或部分重叠。如此，该开口37允许第一光源41发射的不可见光照射至目标物后的反射光穿过，并照射至纹路传感模组42。
此外，可选的，上述开口37在盖板10上的正投影位于显示区AA在盖板10上的正投影内，能够有效提高显示模组100的屏占比。
需要补充的是，第一光源41的发光角度有限，因此背板36中的开口37沿平行于盖板10的方向靠近第一光源41设置，也即，纹路传感模组42沿平行于盖板10的方向靠近第一光源41设置，能够确保纹路传感模组42可以接收到充足的不可见光的反射光。
在一些实施例中，请参阅图2，液晶模组20包括覆晶薄膜(Chip On Flex或Chip On Film，简称COF)61。显示模组100还包括位于液晶模组20的背离盖板10一侧的印制电路板7。COF61的一端与液晶模组20中阵列基板21位于周边区域的部分对应绑定，另一端与印刷电路板7电连接，被配置为实现印刷电路板7与阵列基板21中各信号走线之间的信号传输。
上述第一光源41设置于COF61的靠近盖板10的表面上，且与COF61电连接。可选的，第一光源41焊接在COF61上。如此，第一光源41能够通过COF61与印刷电路板7电连接，以简化第一光源41所需的连接电路或连接器等，有利于降低显示模组100的生产成本。并且，显示模组100的内部也无需考虑增设避让空间以安装第一光源41，结构简单，方便制作。
此外，示例的，如图2所示，第一光源41和第二光源31对应位于液晶模组20中阵列基板21被配置为绑定COF61的一侧。
在另一些实施例中，请参阅图3～图9，显示模组100还包括与盖板10密封连接的封装框5。封装框5包括容置槽，液晶模组20和纹路识别单元分别位于所述容置槽内。
示例的，纹路传感模组42设置于封装框5的容置槽的槽底面上，第一光源41设置于封装框5的容置槽的内侧面上。
可选的，纹路传感模组42通过双面胶或固定胶等胶接在封装框5的容置槽的槽底面上。类似的，第一光源41通过双面胶或固定胶等胶接在封装框5的容置槽的内侧面上。
在一些实施例中，请参阅图10，第一光源41包括柔性电路板载体411和至少一个不可见光灯412。所述至少一个不可见光灯412设置于柔性电路板载体411上且与柔性电路板载体411电连接。可选的，不可见光灯412采用红外发光二极管(Infrared Light-Emitting Diode，IR LED)，例如顶发光型的IR LED。不可见光灯412以焊接的方式固定于柔性电路板载体411上，且各不可见光灯412通过柔性电路板载体411与纹路传感模组42电连接。
此处，柔性电路板载体411的形状可以根据实际需求选择设置。示例的，如图10所示，柔性电路板载体411采用T型或近似T型的结构。上述至少一个不可见光灯412均匀设置于柔性电路板载体411的T型顶端，柔性电路板载体411的T型底端设有被配置为与纹路传感模组42或BTB连接器等电连接的连接部410。柔性电路板载体411通过双面胶或固定胶等胶接在封装框5的容置槽中对应的内侧面上。
当然，第一光源41的结构并不仅限于此。例如，请参阅图7和图8，第一光源41为不可见光灯条，该不可见光灯条可以通过第三电路板63(例如柔性电路板)与纹路传感模组42电连接。
上述纹路传感模组42中各组成部分的形状可以根据实际需求选择设置。以纹路传感模组42为透镜式红外指纹传感模组为例，如图11所示，红外传感器422和红外透镜423采用圆形结构，第一电路板421采用工字型结构。第一电路板421中相对的两侧边缘分别设有连接部410，可以利用该连接部410与BTB连接器或第一光源41中的柔性电路板载体411等电连接，其连接方式可参阅图12，此处不再详述。
上述一些实施例中，与印刷电路板7电连接的各部件，例如第一光源41、第二光源42、纹路传感模组42以及阵列基板21等，均能够与印刷电路板7进行数据交换，以便根据印刷电路板7发送的控制信号执行相应动作，例如控制第一光源41中的不可见光灯412开启或关闭。本公开实施例对此不再详述。
上述第一光源41出射的不可见光需要照射至目标物上，以被目标物反射而形成纹路光信号。因此，第一光源41的出光面相对于盖板10的表面可以有多种设置方式。
在一些示例中，请参阅图3～图6，第一光源41的出光面与盖板10的靠近液晶模组20的表面相交。也即，第一光源41的出光面与盖板10的靠近液晶模组20的表面 之间具有夹角。在第一光源41包括顶发光型的IR LED的情况下，第一光源41的出光面为IR LED的顶面。
可选的，如图3所示，封装框5的容置槽的配置为设置第一光源41的内侧面与该容置槽的槽底面之间具有夹角α，所述夹角α为钝角。这也就是说，封装框5的容置槽的配置为设置第一光源41的内侧面为一倾斜面，第一光源41在固定于所述内侧面上之后，第一光源41的出光面也为一倾斜面，且第一光源41的出光面与盖板10的靠近液晶模组20的表面之间的夹角为：π-α。
上述夹角α与第一光源41中不可见光灯412的发光角度相关，但其影响因素并不仅限于此。例如，显示模组100的厚度、第一光源41和纹路传感模组42的相对位置等，均会对夹角α有所影响。在一些示例中，第一光源41中不可见光灯412的发光角度为120°，封装框5的容置槽的配置为设置第一光源41的内侧面与该容置槽的槽底面之间的夹角α满足：120°≤α≤150°。在另一些示例中，第一光源41中不可见光灯412的发光角度为140°，封装框5的容置槽的配置为设置第一光源41的内侧面与该容置槽的槽底面之间的夹角α满足：110°≤α≤160°。
在夹角α为钝角的情况下，如图4所示，第一光源41发射的不可见光的大部分均能有效照射至目标物例如手指01上，有利于提高该不可见光的利用率，从而提升目标物的纹路识别的准确率。
当然，如图5和图6所示，第一光源41的出光面与盖板10的靠近液晶模组20的表面垂直或大略垂直，也是允许的。示例的，如图5和图6所示，第一光源41包括顶发光型的IR LED，IR LED的顶面与盖板10的靠近液晶模组20的表面垂直或大略垂直，IR LED发射的不可见光的有效出光角度β(即能够有效照射至目标物例如手指01上的角度)为其发光角度的一半。IR LED的厚度很小，如此设置能够有效减小盖板10对应边缘到显示区AA的距离，也即能够有效减小显示模组100对应侧的周边区域，从而提升显示模组100的屏占比。
此外，第一光源41在显示模组100中的设置还可以有其他的方式，例如，如图7所示，封装框5的容置槽的配置为设置第一光源41的内侧面为台阶面。第一光源41位于该容置槽的台阶面的平行于其槽底面的平面上，且第一光源41的出光面与盖板10的靠近液晶模组20的表面平行。
示例的，如图7和图8所示，第一光源41包括顶发光型的IR LED，IR LED的顶面与盖板10的靠近液晶模组20的表面平行，IR LED发射的不可见光的有效出光角度 β为其发光角度的一半。如此，方便于实现显示模组100的设计及制作，有利于提高显示模组100的生产效率。
在又一些实施例中，请参阅图9，第一光源41胶接在盖板10的靠近液晶模组20的表面上。可选的，第一光源41通过双面胶或固定胶等与盖板10胶接。如此，无需对显示模组100的封装框5进行负责的结构设计，例如在封装框5的内侧面上预留避让空间以安装第一光源41，其结构较为简单，易于实现。
请继续参阅图9，第一光源41胶接在盖板10的靠近液晶模组20的表面上，第一光源41通过第二电路板63(例如柔性电路板)与印刷电路板7电连接。该第二电路板63(例如柔性电路板)可以固定于封装框5对应的内侧面上，例如胶接。
本公开一些实施例还提供了一种显示装置。如图13所示，显示装置1000包括如上一些实施例所述的显示模组100。本公开一些实施例提供的显示装置所能实现的有益效果，与上述一些实施例提供的显示模组所能达到的有益效果相同，在此不做赘述。
本公开一些实施例提供的上述显示装置可以是应用于显示领域，不论是运动(例如，视频)的还是固定(例如，静止图像)的，且不论是文字还是图画的图像的任何装置。更明确地说，预期所述实施例可实施在多种电子装置中，所述多种电子装置包括但不限于移动电话、无线装置、个人数据助理(Portable Android Device，缩写为PAD)、手持式或便携式计算机、GPS(Global Positioning System，全球定位系统)接收器/导航器、相机、MP4(全称为MPEG-4 Part 14)视频播放器、摄像机、电视监视器、平板显示器、计算机监视器、美学结构(例如，对于显示一件珠宝的图像的显示器)等。
在上述实施方式的描述中，具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。

Claims (16)

  1. 一种显示模组，包括：液晶模组、盖板以及纹路识别单元；
    所述纹路识别单元包括：
    第一光源，位于所述盖板的靠近所述液晶模组的一侧，被配置为发射不可见光；
    纹路传感模组，位于所述液晶模组的背离所述盖板的一侧；
    其中，所述盖板和所述液晶模组允许透过的光线波长范围包括所述不可见光的光线波长范围；
    所述纹路传感模组被配置为采集所述不可见光照射至目标物后的反射光，以识别所述目标物的纹路。
  2. 根据权利要求1所述的显示模组，还包括：侧入式背光模组；
    所述侧入式背光模组包括：
    导光板，位于所述液晶模组的背离所述盖板的一侧；
    第二光源，位于所述导光板的侧面，被配置为发射可见光；
    至少一层光学薄膜，位于所述导光板的靠近所述液晶模组的一侧，其允许透过的光线波长范围包括所述不可见光的光线波长范围和所述可见光的光线波长范围；
    反射片，位于所述导光板的背离所述液晶模组的一侧，被配置为反射所述可见光且透射所述不可见光；
    其中，所述纹路传感模组位于所述反射片的背离所述导光板的一侧。
  3. 根据权利要求2所述的显示模组，其中，所述液晶模组具有显示区；
    所述第一光源与所述第二光源在所述盖板上的正投影，沿平行于所述盖板的方向，位于所述显示区在所述盖板上的正投影的同一侧边界外。
  4. 根据权利要求2所述的显示模组，其中，所述侧入式背光模组，还包括：
    背板，位于所述反射片的靠近所述纹路传感模组的一侧；
    其中，所述背板与所述纹路传感模组相对的部分设有开口，所述开口允许所述不可见光照射至所述目标物后的反射光穿过并照射至所述纹路传感模组。
  5. 根据权利要求4所述的显示模组，其中，所述液晶模组具有显示区；
    所述开口在所述盖板上的正投影位于所述显示区在所述盖板上的正投影内。
  6. 根据权利要求1～5任一项所述的显示模组，其中，所述液晶模组包括覆晶薄膜；
    所述第一光源设置于所述覆晶薄膜的靠近所述盖板的表面上，且与所述覆晶薄膜 电连接。
  7. 根据权利要求6所述的显示模组，还包括印制电路板；
    所述印制电路板位于所述液晶模组的背离所述盖板的一侧，且与所述覆晶薄膜电连接。
  8. 根据权利要求1～5任一项所述的显示模组，还包括与所述盖板密封连接的封装框；所述封装框包括容置槽；
    所述液晶模组和所述纹路识别单元分别位于所述容置槽内；其中，所述纹路传感模组设置于所述容置槽的槽底面上，所述第一光源设置于所述容置槽的内侧面上。
  9. 根据权利要求8所述的显示模组，其中，所述第一光源的出光面与所述盖板的靠近所述液晶模组的表面相交。
  10. 根据权利要求9所述的显示模组，其中，所述容置槽的配置为设置所述第一光源的内侧面与其槽底面之间具有夹角，所述夹角为钝角。
  11. 根据权利要求9所述的显示模组，其中，所述第一光源的出光面与所述盖板的靠近所述液晶模组的表面垂直或大略垂直。
  12. 根据权利要求8所述的显示模组，其中，所述容置槽的配置为设置所述第一光源的内侧面为台阶面；
    所述第一光源位于所述台阶面的平行于所述槽底面的平面上，且所述第一光源的出光面与所述盖板的靠近所述液晶模组的表面平行。
  13. 根据权利要求1～5任一项所述的显示模组，其中，所述第一光源胶接在所述盖板的靠近所述液晶模组的表面上。
  14. 根据权利要求8～13任一项所述的显示模组，其中，所述第一光源包括：
    柔性电路板载体；
    至少一个不可见光灯，设置于所述柔性电路板载体上且与所述柔性电路板载体电连接。
  15. 根据权利要求14所述的显示模组，还包括印制电路板；
    所述印制电路板位于所述液晶模组的背离所述盖板的一侧，且与所述纹路传感模组电连接。
  16. 一种显示装置，包括如权利要求1～15任一项所述的显示模组。
PCT/CN2019/125658 2019-12-16 2019-12-16 显示模组及显示装置 WO2021119923A1 (zh)

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