CN109426784A - Display module - Google Patents

Display module Download PDF

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Publication number
CN109426784A
CN109426784A CN201710769496.2A CN201710769496A CN109426784A CN 109426784 A CN109426784 A CN 109426784A CN 201710769496 A CN201710769496 A CN 201710769496A CN 109426784 A CN109426784 A CN 109426784A
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CN
China
Prior art keywords
light
dotted
liquid crystal
light source
display panel
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201710769496.2A
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Chinese (zh)
Inventor
凌严
朱虹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Oxi Technology Co Ltd
Shanghai Luoji Technology Co Ltd
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Shanghai Luoji Technology Co Ltd
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.)
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Application filed by Shanghai Luoji Technology Co Ltd filed Critical Shanghai Luoji Technology Co Ltd
Priority to CN201710769496.2A priority Critical patent/CN109426784A/en
Publication of CN109426784A publication Critical patent/CN109426784A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • 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
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • 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
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • 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
    • G02F1/133528—Polarisers

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Image Input (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

A kind of display module, comprising: liquid crystal display panel, including multiple display pixel cells, display pixel cells include through area and it is non-penetrate area, at least partly display pixel cells it is non-through in area with sensor devices；It is dotted to adopt figure light source, positioned at the side of liquid crystal display panel；Protective layer, positioned at liquid crystal display panel and the dotted top for adopting figure light source；Protective layer is sensing face backwards to liquid crystal display panel and the dotted surface for adopting figure light source, dotted to adopt that light caused by figure light source is oblique to be projected in protective layer, conducts through protective layer to sensing face, forms the reflected light for carrying finger print information；Sensor devices acquire reflected light to obtain fingerprint image.Display module obtains clearly fingerprint image under the premise of guaranteeing display effect by the sensor devices being integrated in liquid crystal display panel and the dotted use for adopting figure light source, so that the integrated of fingerprint recognition and image display function be better achieved.

Description

Display module
Technical field
The present invention relates to optical finger print identification field more particularly to a kind of display modules.
Background technique
Fingerprint imaging identification technology is the fingerprint image that human body is collected by fingerprint sensor, then and in system Existing fingerprint imaging information is compared, and whether carrying out correct judgment, and then realizes the technology of identification.The side used due to it Just property and the uniqueness of somatic fingerprint, fingerprint identification technology have been widely used in every field.Such as public security bureau, customs Etc. field of safety check, consumer product areas such as the access control system and PC of building and mobile phone etc..
The implementation of fingerprint imaging identification technology has the multiple technologies such as optical imagery, capacitance imaging, ultrasonic imaging.Relatively For, optical finger print imaging technique, imaging effect is relatively preferable, and equipment cost is relatively low.
On the other hand, the advantages that liquid crystal display panel is small in size with its, light-weight, Low emissivity is widely used in various necks Domain.In the prior art, have in the technology for combining fingerprint town and country technology with liquid crystal display panel, thus in display module Integrating fingerprint identification function, but it is usually to use capacitance type fingerprint recognition principle.
The display module structure of existing integrating fingerprint identification function has much room for improvement, and performance is to be improved.
Summary of the invention
Problems solved by the invention is to provide a kind of display module, under the premise of guaranteeing manufacturing yield, is better achieved Fingerprint recognition and image display function it is integrated.
To solve the above problems, the present invention provides a kind of display module, comprising:
Liquid crystal display panel, including multiple display pixel cells, the display pixel cells include penetrating area and non-transmission Non- penetrate in area, at least partly display pixel cells has sensor devices in area；It is dotted to adopt figure light source, it is located at the liquid crystal display The side of panel；Protective layer, positioned at the liquid crystal display panel and the dotted top for adopting figure light source；The protective layer is backwards The liquid crystal display panel and the dotted surface for adopting figure light source are sensing face, described dotted to adopt light caused by figure light source It is oblique to be projected in the protective layer, it conducts through the protective layer to the sensing face, forms the reflection for carrying finger print information Light；The sensor devices acquire the reflected light to obtain fingerprint image.
Optionally, the sensor devices have the lighting surface for acquiring the reflected light；The lighting surface and the sensing face The distance between be greater than 0.4mm.
Optionally, the liquid crystal display panel includes the array substrate being oppositely arranged and colored optical filtering substrates, and filling Liquid crystal layer between the array substrate and the colored optical filtering substrates；The array substrate is located at the colored optical filtering substrates Between the sensing face；Alternatively, the colored optical filtering substrates are between the array substrate and the sensing face.
Optionally, the colored optical filtering substrates include multiple colored light-filtering units and be filled in the colored light-filtering units it Between black matrix；It is described corresponding with the colored light-filtering units through area；It is described non-corresponding with the black matrix through area.
Optionally, the colored optical filtering substrates are between the array substrate and the sensing face；The sensor devices Reflected light for black matrix described in acquisition of transmission.
Optionally, the liquid crystal display panel further include: the first polarizing film and the second polarizing film being oppositely arranged, the battle array Column substrate and the colored optical filtering substrates are between first polarizing film and second polarizing film；The sensor devices are used The reflected light of the first polarizing film described in acquisition of transmission or second polarization.
Optionally, the liquid crystal display panel further include: frame glue layer, the frame glue layer are located at the array substrate and described Between colored optical filtering substrates and surround the liquid crystal layer；The dotted figure light source of adopting is located at the frame glue layer far from the liquid crystal layer Side.
Optionally, the dotted wave-length coverage for adopting light produced by figure light source is within the scope of 700nm to 1500nm.
Optionally, further includes: thickening layer, between the liquid crystal display panel and the protective layer.
Optionally, further includes: light guide has the plane of incidence and the first exit facet, and the plane of incidence dotted is adopted towards described The light-emitting surface of figure light source, first exit facet is towards the protective layer；It is described dotted to adopt light caused by figure light source from institute Light-emitting surface outgoing is stated, enters the light guide through the plane of incidence, is at least partially into the light of the light guide from described the One exit face, and be projected in the protective layer.
Optionally, the light guide further includes the second exit facet, and second exit facet is towards the thickening layer；Part into Enter the light of the light guide from second exit face, be projected to the thickening layer, and through the thickening layer conduct to In the protective layer.
Optionally, the plane of incidence is towards the dotted curved surface for adopting figure light source protrusion.
Optionally, the material of the light guide is light transmission glue；The plane of incidence and the dotted light-emitting surface for adopting figure light source It is in contact, the first exit facet of at least described light guide and the protective layer are towards the dotted part of the surface phase for adopting figure light source Contact.
Optionally, further includes: light shield layer, positioned at the protective layer towards in the dotted part of the surface for adopting figure light source, The light shield layer at least exposes protective layer part corresponding with the thickening layer.
Optionally, the light shield layer, which is at least set to, dotted adopts the corresponding position of figure light source with described.
Optionally, the thickening layer has the first face towards the protective layer and the towards the liquid crystal display panel Two faces, and the side in connection first face and the second face；It is described dotted to adopt light caused by figure light source through the side Into the thickening layer, it is emitted and is projected in the protective layer from first face.
Optionally, the side is perpendicular to first face or second face；Alternatively, the side and first face Between angle be acute angle, and angle is obtuse angle between second face.
Optionally, which is characterized in that the thickness of the thickening layer is within the scope of 0.2mm to 0.5mm.
Optionally, further includes: collector lens, before the dotted light-emitting surface for adopting figure light source, for converging the point Shape adopts light caused by figure light source.
Optionally, the dotted figure light source of adopting is a LED light.
Optionally, the dotted figure light source of adopting includes two or three above LED light；The display module further include: adopt Light control unit, for controlling the dotted LED light adopted in figure light source when the sensor devices acquire light every time Generate light.
Optionally, the liquid crystal display panel is liquid crystal display panel based on amorphous silicon film transistor, is based on low temperature The liquid crystal display panel of polycrystalline SiTFT or liquid crystal display panel based on indium gallium zinc oxide thin film transistor (TFT).
Compared with prior art, technical solution of the present invention has the advantage that
Non- through sensor devices are integrated in area in the liquid crystal display panel, the sensor devices are carried for acquiring There is the reflected light of finger print information to obtain fingerprint image；The reflected light is to adopt the warp of light produced by figure light source by dotted simultaneously Protective layer conduction and formed in the sensing face；As the dotted consistency for adopting light produced by figure light source compared with By force, stray light is less；And the dotted side adopted figure light source and be located at the liquid crystal display panel, therefore described dotted adopt figure Light produced by light source is directly projected in the protective layer, and without transmiting the liquid crystal display panel, light is being projected to It not will receive the influence of various structures in the liquid crystal display panel before stating sensing face, it is smaller by the probability scattered, so The consistency for being projected to the sensing face glazed thread can be effectively kept, the ingredient of stray light in the reflected light is effectively reduced； The holding of light uniformity, the reduction of stray light component, can effectively improve the signal collected signal-to-noise ratio of the sensor devices, Be conducive to the acquisition of high quality fingerprint image；And the raising of the signal collected signal-to-noise ratio of the sensor devices, make the sense Also clearly fingerprint image can be obtained when distance is larger between optical device and the sensing face, it is described photosensitive without reducing The distance between device and the sensing face can effectively ensure that the display effect of the liquid crystal display panel, guarantee the guarantor The thickness of sheath, and then the integrated of fingerprint recognition and image display function can be realized under the premise of guaranteeing manufacturing yield.
In optinal plan of the present invention, the liquid crystal display panel includes the array substrate being oppositely arranged and colorized optical filtering base Plate, and the liquid crystal layer being filled between the array substrate and the colored optical filtering substrates；The array substrate is located at described Between colored optical filtering substrates and the sensing face；Alternatively, the colored optical filtering substrates are located at the array substrate and the sensing Between face, so as to select array substrate described in the liquid crystal display panel according to the specific requirement of the display module Guarantee the guarantor with the relative positional relationship of the colored optical filtering substrates to guarantee the display effect of the liquid crystal display panel The thickness of sheath, and then be conducive to the base for preferably realizing fingerprint recognition and image display function, be conducive to remain higher Manufacturing yield, lower cost of manufacture.
In optinal plan of the present invention, the colored optical filtering substrates include multiple colored light-filtering units and are filled in the colour Black matrix between filter unit；The display pixel cells it is non-corresponding with the position of the black matrix through area, so The sensor devices are located at the corresponding position of the black matrix, i.e., the described sensor devices on the colored optical filtering substrates just Projection is located at the black matrix position；Since the presence of the black matrix has no effect on the aobvious of the liquid crystal display panel Show effect, so the sensor devices are set to the corresponding position of the black matrix, can be effectively reduced the photoreceptor Influence of the part to the liquid crystal display panel display effect is advantageously implemented the integrated of fingerprint recognition and image display function.
In optinal plan of the present invention, the dotted figure light source of adopting is infrared light supply, and the wave-length coverage of produced light is greater than 700nm, therefore the dotted propagation for adopting light produced by figure light source in the protective layer, and formed reflected light is by institute The process for stating sensor devices acquisition can't impact the display effect of the liquid crystal display panel, can effectively ensure that The display effect of the liquid crystal display panel；Especially when the colored optical filtering substrates are located at the array substrate and the sensing Between face, the black matrix is higher to the transmitance of infrared light, and the sensor devices are anti-for black matrix described in acquisition of transmission Penetrate light, therefore by the dotted way adopted figure light source and be set as infrared light supply, additionally it is possible to the black matrix be effectively reduced to institute The influence for stating fingerprint image acquisition is conducive to the acquisition of clear fingerprint image.
In optinal plan of the present invention, due to the use and the dotted setting for adopting figure light source position of the dotted coloured picture light source, The signal collected signal-to-noise ratio of the sensor devices can be effectively improved, can guarantee the sensor devices and the sensing face it Between distance, can not only guarantee the thickness of the protective layer, be conducive to the raising of manufacturing yield；Can also make the thickening layer, The light guide and the collector lens are set to possibility, can be effectively improved the quality of obtained fingerprint image, can The display effect for improving the liquid crystal display panel is conducive to the function of preferably taking into account fingerprint recognition and image is shown.
Detailed description of the invention
Fig. 1 is that the invention shows the schematic diagram of the section structure of mould group first embodiment；
Fig. 2 is that the invention shows the schematic diagram of the section structure of mould group second embodiment；
Fig. 3 is that the invention shows the schematic diagram of the section structure of mould group 3rd embodiment；
Fig. 4 is that the invention shows the schematic diagram of the section structure of mould group fourth embodiment；
Fig. 5 is that the invention shows the schematic diagram of the section structure of the 5th embodiment of mould group；
Fig. 6 is that the invention shows the schematic diagram of the section structure of mould group sixth embodiment；
Fig. 7 is that the invention shows the overlooking structure diagrams of the vertical sensing face of the 7th embodiment of mould group.
Specific embodiment
As described in background, the prior art mostly uses the aobvious of capacitance type fingerprint imaging technique and light-emitting display panel Show that mould group is integrated.
To solve the technical problem, the present invention provides a kind of display module, by being integrated in the liquid crystal display panel In sensor devices and the dotted use for adopting figure light source obtain clearly fingerprint image under the premise of guaranteeing display effect Picture, so that the integrated of fingerprint recognition and image display function be better achieved.
To make the above purposes, features and advantages of the invention more obvious and understandable, with reference to the accompanying drawing to the present invention Specific embodiment be described in detail.
With reference to Fig. 1, show that the invention shows the schematic diagram of the section structure of mould group first embodiment.
The display module includes:
Liquid crystal display panel 110, including multiple display pixel cells 101, the display pixel cells 101 include penetrating area 102 and it is non-penetrate area 103, at least partly display pixel cells 101 is non-through having sensor devices 116 in area 103；It is dotted to adopt Figure light source 120, positioned at the side of the liquid crystal display panel 110；Protective layer 130 is located at the liquid crystal display panel 110 and institute State the dotted top for adopting figure light source 120；The protective layer 130 is backwards to the liquid crystal display panel 110 and described dotted adopts figure light The surface in source 120 is sensing face 131, described dotted to adopt that light caused by figure light source 120 is oblique to be projected to the protective layer 130 It is interior, through the protective layer 130 conduction to the sensing face 131, form the reflected light for carrying finger print information；The sensor devices The 116 acquisition reflected lights are to obtain fingerprint image.
Non- penetrate in area 103 in the liquid crystal display panel 110 is integrated with sensor devices 116, the sensor devices 116 For acquiring the reflected light for carrying finger print information to obtain fingerprint image；The reflected light is to adopt figure light source by dotted simultaneously Light produced by 120 is conducted through the protective layer 130 and is formed in the sensing face 131；Dotted figure light is adopted due to described The consistency of light produced by source 120 is stronger, and stray light is less；And the dotted figure light source 120 of adopting is located at the liquid crystal Show the side of panel 110, thus it is described it is dotted adopt light produced by figure light source 120 and be directly projected in the protective layer 130, nothing The liquid crystal display panel 110 need to be transmitted, light not will receive the LCD display before being projected to the sensing face 131 The influence of various structures in plate 110, it is smaller by the probability scattered, so can effectively keep being projected to the sensing face 131 The ingredient of stray light in the reflected light is effectively reduced in the consistency of glazed thread；The holding of light uniformity, stray light component It reduces, the signal collected signal-to-noise ratio of the sensor devices 116 can be effectively improved, be conducive to obtaining for high quality fingerprint image ?；And the raising of the signal collected signal-to-noise ratio of the sensor devices 116, make the sensor devices 116 and the sensing face Also clearly fingerprint image can be obtained when distance is larger between 131, without reducing the sensor devices 116 and the sense The distance between survey face 131 can effectively ensure that the display effect of the liquid crystal display panel 110, guarantee the protective layer 130 Thickness, and then can realize the integrated of fingerprint recognition and image display function under the premise of guaranteeing manufacturing yield.
The specific technical solution for display module embodiment that the invention will now be described in detail with reference to the accompanying drawings.
The dotted figure light source 120 of adopting is for generating the light of acquisition fingerprint image.
In the present embodiment, the dotted figure light source 120 of adopting is infrared light supply；Specifically, according to the sensor devices 116 Type and technical parameter, the dotted figure light source 120 of adopting is near-infrared light source.Set red for the dotted figure light source 120 of adopting The way of outer light source can be effectively reduced the dotted propagation for adopting light produced by figure light source 120 in the protective layer 130 Process, and formed reflected light show 110 image of liquid crystal display panel by the collection process of the sensor devices 116 The influence of function can obtain clearly fingerprint image, be conducive to that fingerprint is better achieved under the premise of guaranteeing display effect Identification is integrated with image display function.
Specifically, the visible spectrum that can be experienced due to people's vision is in 390nm to 780nm range, the liquid crystal Display panel 110 forms the wavelength of display light generally in 400nm to 700nm range, dotted adopts figure light source 120 so described The wave-length coverage of produced light is in 700nm to 1500nm range.
In the present embodiment, the dotted figure light source 120 of adopting is a LED light；Dotted figure light source 120 is adopted specifically, described For an infrared LED lamp.
The protective layer 130 be located at it is described it is dotted adopt on figure light source 120, to play defencive function.
The sensing face 131 is the protective layer 130 backwards to the dotted surface for adopting figure light source 120, for receiving touching It touches to realize fingerprint collecting.Specifically, the protective layer 130 is the cover-plate glass of the display module in the present embodiment.
It is described it is dotted adopt light caused by figure light source 120 and conducted through the protective layer 130, it is oblique to be projected to the sensing On face 131, reflection or refraction occur in the sensing face 131, is formed in the sensing face 131 and carries finger print information Reflected light.
The liquid crystal display panel 110 is used to show pattern dynamically or statically, to realize image display function；It is described Sensor devices 116 can acquire the reflected light, and the reflected light is carried out photoelectric conversion, to obtain fingerprint image, so The liquid crystal display panel 110 can be realized the integrated of fingerprint recognition and image display function.
The liquid crystal display panel 110 includes multiple display pixel cells 101, and the display pixel cells 101 include saturating Cross area 102 and non-through area 103, the sensor devices 116 are located at least partly the non-of display pixel cells 101 and penetrate area 103.
Due to it is described it is non-through area 103 be inherently present in the liquid crystal display panel 110, it is described non-to penetrate area 103 Presence will not influence the image display function of the liquid crystal display panel 110, therefore the sensor devices 116 are set to It is described non-through area 103, it can be effectively reduced the sensor devices 116 to the shadow of 110 display function of liquid crystal display panel It rings.
In addition, the dotted consistency for adopting light produced by figure light source 120 is preferable, stray light is less；And the point Shape adopts the side that figure light source 120 is located at the liquid crystal display panel 110, and produced light is directly conducted through the protective layer 130 To in the sensing face 131, without transmiting the liquid crystal display panel 110, therefore on being transmitted through the sensing face 131 it Before, light is smaller by the probability scattered, and produced interference light is less；So the formed reflected light in the sensing face 131 In, signal light intensity is larger, and interference luminous intensity is weaker, and the noise of the acquired reflected light of the sensor devices 116 is relatively high, favorably In the fingerprint image for obtaining high quality.
Moreover, because the noise of the reflected light is relatively high, therefore when the sensor devices 116 and the sensing face 131 Between distance it is larger when, the sensor devices 116 can also obtain clearly fingerprint image, that is to say, that without reduce described in The distance between sensor devices 116 and the sensing face 131, can effectively ensure that the thickness of the protective layer 130, described in guarantee The display effect of liquid crystal display panel 110, and then can realize that fingerprint recognition and image are aobvious under the premise of guaranteeing manufacturing yield Show the integrated of function.
It should be noted that the liquid crystal display panel 110 is based on amorphous silicon film transistor in the present embodiment The liquid crystal display panel of (Amorphous Silicon Thin Film Transistor, a-Si:H TFT).But it is of the invention In other embodiments, the liquid crystal display panel is also possible to based on low-temperature polysilicon film transistor (LowTemperature Poly Si Thin Film Transistor, LTP-Si TFT) liquid crystal display panel or based on indium gallium zinc oxide it is thin The LCD display of film transistor (Indium Gallium Zinc Oxide Thin Film Transistor, IGZO TFT) Plate.
The display module further includes display backlight (not indicating in figure).Light energy caused by the display backlight It is enough to realize transmission to form display light through area 102 from the display pixel cells 101；From different display pixel cells 101 The display light color of transmission, light intensity are different, to realize image display function.So the sensor devices 116 are set to institute Non- transmission area 103 is stated, the setting of the sensor devices 116 can be effectively prevent to 110 display function of liquid crystal display panel It impacts, advantageously ensures that display effect, and obtain clearly fingerprint image, be conducive to that fingerprint recognition and figure is better achieved As integrating for display function.
As shown in Figure 1, the dotted side adopted figure light source 120 and be located at the liquid crystal display panel 110, i.e., in parallel institute In the plane for stating sensing face 131, the dotted side adopted the projection of figure light source 120 and be located at the liquid crystal display panel 110 projection； The protective layer 130 cover it is described it is dotted adopt figure light source 120 and the liquid crystal display panel 110, for protecting the liquid crystal Show panel 110 and described dotted adopts figure light source 120 and other hardware devices.
It dotted adopt light caused by figure light source 120 so described and is projected to the protective layer so that certain angle of divergence is oblique In 130, it is projected in the sensing face 131；The reflected light is also emitted with certain angle of divergence from the sensing face 131, is thrown It is incident upon on the sensor devices 116.
The liquid crystal display panel 110 includes the array substrate 111 being oppositely arranged and colored optical filtering substrates 112, and is filled out Fill the liquid crystal layer 113 between the array substrate 111 and the colored optical filtering substrates 112.
The colored optical filtering substrates 112 include multiple colored light-filtering units 112c and are filled in the colored light-filtering units Black matrix 112b between 112c.
The colored light-filtering units 112c is for making light caused by the display backlight form colourama.It is general next It says, the material of the colored light-filtering units 112 is photoresist；The colored light-filtering units 112 include red photoresist, green light Resistance and three sub-pixels of blue light resistance.The material of the black matrix 112b is also photoresist, for realizing adjacent color optical filtering Isolation between unit 112c；Furthermore the color of the black matrix 112b is black, so stray light can also be absorbed, to mention The display effect of the high liquid crystal display panel.
In colored optical filtering substrates 112, the colored light-filtering units 112c needs light transmission that can make the display Light caused by backlight forms colourama；And be projected to the light on the black matrix 112b then can the black matrix 112b It absorbs；Therefore described corresponding with the colored light-filtering units 112c through area 102 in each display pixel cells 101, institute It states non-corresponding with the black matrix 112b through area 103, that is to say, that in the pixel unit 101, the colorized optical filtering list First region 112c is the pixel unit 101 through area 102, and the region the black matrix 112b is the picture The non-of plain unit 101 penetrates area 103.
The array substrate 111 includes device substrate (not indicating in figure) and the control positioned at the device substrate surface Device (not shown).Wherein, the device substrate is used to provide technological operation surface for the formation of the control device, also For providing mechanical support for the control device；The control device is for controlling formed electric field in the liquid crystal layer 113 Intensity, to control the deflection direction of liquid crystal and deflection angle in the liquid crystal layer 113.
The array substrate 111 further include: transparent electrode (does not indicate) in figure, is located in the device substrate, and described Control device is connected, and for forming electric field in the liquid crystal layer 113, and adjusts and is formed under the control of the control device The intensity of electric field and direction, to reach liquid crystal deflection direction and deflection angle in the control liquid crystal layer 113, realize that image is aobvious The purpose shown.
In the array substrate 111, the transparent electrode can be realized the transmission of light, often have in the control device There is the metal layer for realizing electricity conducting；Therefore the transparent electrode is located in the transmission area of the pixel unit 101, the control Device is located at the non-of the pixel unit 101 and penetrates in area, to prevent the control device from influencing the liquid crystal display panel Image show.
Due to it is described through area 102 it is corresponding with the colored light-filtering units 112c, it is described it is non-transmission area 103 with it is described black Matrix 112b is corresponding, therefore as shown in Figure 1, the transparent electrode is corresponding with the position the colored light-filtering units 112c, described Control device is corresponding with the position the black matrix 112b, i.e., positive throwing of the described transparent electrode on the colored optical filtering substrates 112 Shadow is located in the range of the colored light-filtering units 112c, positive throwing of the control device on the colored optical filtering substrates 112 Shadow is located in the range of the black matrix 112b.
Since the material of the colored light-filtering units 112c and the black matrix 112b are mainly photoresist, this implementation In example, the sensor devices 116 are formed in the device substrate of the array substrate 111, so as to make the sensor devices The semiconductor structures such as 116 and the control device, the transparent electrode are formed by same process flow, can be advantageously ensured that The formation quality of the sensor devices 116 is conducive to the device performance and manufacturing yield that improve the liquid crystal display panel 110.
Specifically, in order to avoid influencing the image display function of the liquid crystal display panel 110, the sensor devices 116 It is set to described non-through area 103；And it is described non-corresponding with the black matrix 112b through area 103, therefore the photoreceptor Part 116 is located at the corresponding position the black matrix 112b, i.e., the described sensor devices 116 are on the colored optical filtering substrates 112 Orthographic projection be located at the black matrix 112b position；Since the presence of the black matrix 112b has no effect on the liquid crystal The display effect of display panel 110, so the sensor devices 116 are set to the corresponding position the black matrix 112b, It can be effectively reduced influence of the sensor devices 116 to 110 display effect of liquid crystal display panel, be advantageously implemented fingerprint Identification is integrated with image display function.
As shown in Figure 1, the array substrate 111 is located at the colored optical filtering substrates 112 and the protection in the present embodiment Between layer 130, i.e., the described array substrate 111 is between the colored optical filtering substrates 112 and sensing face 131.The present invention other In embodiment, the array substrate may be located on side of the colored optical filtering substrates far from the protective layer, i.e., the described coloured silk Color optical filtering substrate is between the array substrate and the protective layer；Therefore it can specifically be wanted according to the display module It asks, selects the relative positional relationship of array substrate described in the liquid crystal display panel and the colored optical filtering substrates, to guarantee The display effect of the liquid crystal display panel, guarantees the thickness of the protective layer 130, and then is conducive to preferably realize that fingerprint is known Other and image display function base, is conducive to maintain higher manufacturing yield, lower cost of manufacture.
Specifically, the sensor devices 116 have the lighting surface (not indicating in figure) for acquiring the reflected light；The present embodiment In, towards the sensing face 131, the reflected light for carrying finger print information is emitted the lighting surface from the sensing face 131, projection On to the lighting surface, acquired by the sensor devices 116 to carry out photoelectric conversion.
In the present embodiment, the distance between the lighting surface and the sensing face 131 D are greater than 0.4mm.
It is described to adopt since the sensing face 131 is located at the protective layer 130 liquid crystal display panel 110 backwards Distance D is too small between smooth surface and the sensing face 131, and 130 thickness of protective layer can be made too small, then may will affect the guarantor The protective capability of sheath 130；In addition, distance D is too small between the lighting surface and the sensing face 131, it also can be to the array The thickness of substrate 111 causes excessive limitation, increases so as to will cause the 111 formation process difficulty of array substrate, shadow The formation quality for ringing formed array substrate 111, influences the quality of the sensor devices 116, is likely to result in the display mould The problem of group display function is degenerated, fingerprint image quality declines.
Since the dotted consistency for adopting light produced by figure light source 120 is higher, stray light is less, described dotted to adopt figure Light source 120 is located at the side of the liquid crystal display panel 110, and light is scattered before being projected in the sensing face 131 Probability it is smaller, in the sensing face 131 formed reflected light noise it is relatively high；Therefore it is described it is dotted adopt figure light source 120 and Its position is that have relatively large distance D without influencing clear fingerprint image acquisition between the lighting surface and the sensing face 131 Premise, can make between the liquid crystal display panel 110 and the protective layer 130 be arranged other function structure (such as: condenser type Touch screen etc.) it is possibly realized.
It should be noted that according to the principle of the liquid crystal display, the liquid crystal display panel 110 further include: opposite to set The the first polarizing film 114a and the second polarizing film 114b set, the array substrate 111 and the colored optical filtering substrates 112 are located at institute It states between the first polarizing film 114a and the second polarizing film 114b；The sensor devices 116 are for described in acquisition of transmission first The reflected light of polarizing film 114a.
In the present embodiment, the first polarizing film 114a between the array substrate 111 and the protective layer 130, The second polarizing film 114b is located at side of the colored optical filtering substrates 112 far from the protective layer 130, wherein described Two polarizing film 114b are the polarizer, for making light caused by the display backlight form polarised light；First polarization Piece 114a is analyzer, is used to form the display light for realizing that image is shown；The sensor devices 116 are for described in acquisition of transmission the The reflected light of one polarizing film 114a.
Specifically, being emitted from the protective layer 130 after the reflected light is formed in the sensing face 131, institute need to be transmitted Stating the first polarizing film 114a could be acquired by the sensor devices 116；It is described dotted to adopt figure light source 120 and in the present embodiment For near-infrared light source, produced light is near infrared light, that is, formed reflected light is also near infrared light, so first polarization Piece 114a is required to transmit the reflected light, to prevent the presence of the first polarizing film 114a from influencing clear fingerprint image Acquisition.
It in other embodiments, can also be the polarizing film as the polarizer the first polarizing film, as analyzer Polarizing film is the second polarizing film.
Since liquid crystal is liquid, there is mobility, therefore the liquid crystal display panel 110 further include: frame glue layer 115, institute Frame glue layer 115 is stated between the array substrate 111 and the colored optical filtering substrates 112 and surrounds the liquid crystal layer 113, is used In encapsulated liquid crystals.
In the present embodiment, the frame glue layer 115 of the liquid crystal display panel 110 is located at the colored optical filtering substrates 112 and institute It states between array substrate 111, to seal the liquid crystal layer 113；So the dotted figure light source 120 of adopting is located at the frame glue layer 115 sides far from the liquid crystal layer 113, that is to say, that in the protective layer 130 towards the liquid crystal display panel 110 On surface, the projection of the liquid crystal layer 113 is surrounded in the projection of the frame glue layer 115, and the projection of the frame glue layer 115 is located at The dotted figure light source 120 of adopting projects between the projection of the liquid crystal layer 113.
Dotted light produced by figure light source 120 is adopted without transmiting the liquid crystal display panel 110, especially not so described It needs to transmit the liquid crystal layer 113, and is directly projected on the protective layer 130, so as to effectively prevent the liquid crystal Show scattering of the structure to light in panel 110, to advantageously reduce the generation of stray light, is conducive to the improvement of signal-to-noise ratio, has Conducive to the raising of fingerprint image quality.
In the present embodiment, the display module further include: light guide 140 has the plane of incidence 141 and the first exit facet 142, The plane of incidence 141 is towards the dotted light-emitting surface for adopting figure light source 120, and first exit facet 142 is towards the protective layer 130。
So it is described it is dotted adopt light caused by figure light source 120 and be emitted from the light-emitting surface, through the plane of incidence 141 Into the light guide 140, the light for being at least partially into the light guide 140 is emitted from first exit facet 142, and is thrown It is incident upon in the protective layer 130.
Specifically, the material of the light guide 140 is light transmission glue, the plane of incidence of the light guide 140 in the present embodiment 141 are in contact with the dotted light-emitting surface for adopting figure light source 120, the first exit facet 142 of at least described light guide 140 with it is described Protective layer 140 is in contact towards the dotted part of the surface for adopting figure light source 120.So the light guide 140 can also be realized The dotted fixation for adopting figure light source 120, the light guide 140 is by the connection with the protective layer 130 to realize fixation.
It should be noted that the light guide 140 is on the surface of the liquid crystal display panel 110 in the present embodiment It is additionally provided with light-absorption layer (not indicating in figure), for absorbing stray light, to reduce the liquid crystal display panel 110 and the point Shape adopts the interference of light between figure light source 120, preferably realizes the integrated of image display function and fingerprint identification function, is conducive to The guarantee of display effect is conducive to the acquisition for cleaning fingerprint image.Specifically, the light-absorption layer can be with extinction function Dark ink.
With reference to Fig. 2, show that the invention shows the schematic diagram of the section structure of mould group second embodiment.
The present embodiment is identical with the first embodiment place, and the present invention repeats no more again.The present embodiment and previous embodiment A difference be the colored optical filtering substrates 212 between the array substrate 211 and the sensing face 231, i.e., The array substrate 211 is located at side of the colored optical filtering substrates 212 far from the protective layer 230.So the liquid crystal Show the relative positional relationship of array substrate 211 and the colored optical filtering substrates 212 described in panel 210, it can be according to described aobvious Show the specific requirement of mould group and set, so as to effectively realize the integrated of fingerprint recognition and image display function, is conducive to protect The thickness for demonstrate,proving the protective layer 230 is conducive to maintain higher manufacturing yield, lower cost of manufacture.
Light caused by the display backlight is after transmiting the array substrate 211, conduction to the liquid crystal layer It in 213, is modulated by the liquid crystal molecule in the liquid crystal layer 213, then transmits the colored optical filtering substrates 212 and be emitted, it is aobvious to be formed Show light, realizes image display function.
The sensor devices 216 are formed in the device substrate (not indicating in figure) of the array substrate 211, and are set to It is described non-through area 203；And it is described non-corresponding with the black matrix 212b through area 203, therefore the sensor devices 216 are located at the corresponding position the black matrix 212b, i.e., the described sensor devices 216 are on the colored optical filtering substrates 212 Orthographic projection is located at the black matrix 212b position, so the sensor devices 216 are for black matrix described in acquisition of transmission The reflected light of 212b.
In addition, the black matrix 212b is mainly used in the liquid crystal display panel 110, visible light wave range is absorbed Stray light, to prevent metal layer reflection light in the control device and influence display effect, therefore the black matrix 212b There is preferable absorption to visible light, there is certain translucency to the infrared light.So in the present embodiment, the point It is infrared light supply that shape, which adopts figure light source 220, and the wave-length coverage of produced light is greater than 700nm, to improve the black matrix 212b To the transmissivity of formed reflected light, be conducive to the acquisition of clear finger print information.
In addition, the wave-length coverage of display light is formed according to liquid crystal display panel 210, in the liquid crystal display panel 210 Liquid crystal layer 213 and polarizing film etc. good modulating action can be played to visible light, so as to effectively realize that image is aobvious Show function；So setting infrared light supply for the dotted figure light source 220 of adopting, i.e., fingerprint image acquisition is realized by infrared light Way can effectively avoid the liquid crystal display panel 210 from being advantageously implemented figure to the influence of the fingerprint image acquisition function As the function of display and Fingerprint recognition is compatible.
In addition, as shown in Fig. 2, in the present embodiment with another difference of first embodiment are as follows: the present embodiment further includes Thickening layer 250, between the liquid crystal display panel 210 and the protective layer 230.
The thickening layer 250 is laminated between the liquid crystal display panel 210 and the protective layer 230, the thickening layer 250 thickness is in 0.2mm to 0.5mm encloses.The thickening layer 250 enters guarantor for increasing dotted 220 emergent light of figure light source of adopting The angular range of sheath, to increase imageable fingerprint area.The thickness of the thickening layer 250 should not it is too big also should not be too It is small.The thickness of the thickening layer 250 is too small, and increased fingerprint area is insufficient；The thickness of the thickening layer 250 is too thick, can be bright The aobvious thickness for increasing entire display module.
As shown in Fig. 2, in the present embodiment with another difference of first embodiment are as follows: the light guide 240 further includes Second exit facet 242, second exit facet 242 is towards the thickening layer 250；Part enters the light of the light guide 240 It is emitted from second exit facet 242, is projected to the thickening layer 250, and through the thickening layer 250 conduction to the protective layer In 230.
So in the present embodiment, it is described it is dotted adopt light caused by figure light source 220 enter the light guide 240 it Afterwards, a part of light is conducted through the light guide 240, is directly transmitted through the protective layer 230 from first exit facet 241 It is interior, and be projected in the sensing face 231；Another part light is conducted through the light guide 240, from second exit facet 242 outgoing, are projected in the thickening layer 250, after through the thickening layer 250 conduction in the protective layer 230, then project On to the sensing face 231.
Specifically, the thickening layer 250 has towards the first face (not indicating in figure) of the protective layer 230 and towards institute State the second face (not indicating in figure) of liquid crystal display panel 210, and connection first face and the second face side (in figure not Mark)；It is described it is dotted adopt light caused by figure light source 220 through the side enter the thickening layer 250, from first face It is emitted and is projected in the protective layer 230.
In the present embodiment, the material of the light guide 240 is also transparent adhesive tape, the dotted light-emitting surface for adopting figure light source 220 It is in contact with the plane of incidence 243, first exit facet 241 and the protective layer 230 dotted adopt figure light source 220 towards described Surface be in contact, second exit facet 242 is in contact with the side of the thickening layer 250.
With reference to Fig. 3, show that the invention shows the schematic diagram of the section structure of mould group 3rd embodiment.
In the present embodiment, the array substrate 311 between the colored optical filtering substrates 312 and the protective layer 330, The i.e. described array substrate 311 is between the colored optical filtering substrates 312 and sensing face 331.In the liquid crystal display panel 310 The relative positional relationship of the array substrate 311 and the colored optical filtering substrates 312, can be according to the specific of the display module It is required that and set, so as to effectively realize the integrated of fingerprint recognition and image display function, advantageously ensure that the protective layer 330 thickness is conducive to maintain higher manufacturing yield, lower cost of manufacture.
The present embodiment and previous embodiment the difference is that, in the present embodiment, the light guide 340 is prism.By institute The way that light guide 340 is set as prism is stated, the assembly difficulty of the light guide 340 can be effectively reduced, is conducive to improve institute The manufacturing yield and device performance for stating display device, are conducive to the guarantee of display effect and fingerprint image quality.
Specifically, the light guide 340 is right-angle prism in the present embodiment, there is orthogonal first right-angle surface 341 With the second right-angle surface 342, and the inclined-plane 343 of connection first right-angle surface 341 and second right-angle surface 342；It is described oblique Face 343 is the plane of incidence of the light guide 341, and first right-angle surface 341 is first exit facet, second right-angle surface 342 be second exit facet.
So first right-angle surface 341 fits towards the protective layer 330 and with the surface of the protective layer 330, Second right-angle surface 342 fits towards the thickening layer 350 and with the side of the thickening layer 350,343 court of inclined-plane Dotted figure light source 320 is adopted to described.It is described it is dotted adopt light caused by figure light source 320, through the light guide 340 conduct, portion First right-angle side 341 described in lease making is directly projected in the protective layer 330, is partially projected to through second right-angle side 342 The thickening layer 350, through in the thickening layer 350 conduction to the protective layer 330.
Since the dotted figure light source 320 of adopting is formed by light consistency with higher, less stray light, institute's shape It is relatively high at the noise of reflected light, it can effectively ensure that the distance between the sensing face 131 and described sensor devices 116, protect The thickness for demonstrate,proving the protective layer 130 is conducive to the manufacturing yield for maintaining the display module；It but also can be the light guide 340 selection provides biggish choice, improves fingerprint image quality, enhancing image display effect so as to preferably reach The purpose of fruit.
With reference to Fig. 4, show that the invention shows the schematic diagram of the section structure of mould group fourth embodiment.
In the present embodiment, the array substrate 411 between the colored optical filtering substrates 412 and the protective layer 430, The i.e. described array substrate 411 is between the colored optical filtering substrates 412 and sensing face 431.In the liquid crystal display panel 410 The relative positional relationship of the array substrate 411 and the colored optical filtering substrates 412, can be according to the specific of the display module It is required that and set, so as to effectively realize the integrated of fingerprint recognition and image display function, advantageously ensure that the protective layer 430 thickness is conducive to maintain higher manufacturing yield, lower cost of manufacture.
The present embodiment is similar with 3rd embodiment, and the light guide 440 is also prism, and still, the light guide 440 enters Penetrating face 443 is towards the dotted curved surface for adopting the protrusion of figure light source 420.
The first exit facet 441 and the second exit facet 442 of the light guide 440 are mutually perpendicular to, and the plane of incidence 443 connects First exit facet 441 and second exit facet 442.Towards dotted 443 energy of the plane of incidence for adopting 420 protrusion of figure light source The structure of convex lens is enough formed, to make described dotted to adopt light produced by figure light source 420 and be projected into the light guide 440 When, it is converged by the light guide 440, reduces the angle of divergence of light, form reflected light in the sensing face 431 to reduce The angle of divergence is conducive to the quality for improving formed fingerprint image, advantageously reduces the probability of fingerprint image distortion phenomenon appearance.
It should be noted that in the present embodiment, by having towards the dotted leaded light adopted figure light source 420 and protrude curved surface Part 440 constitutes convex lens structures, reduces the dotted purpose for adopting divergence of beam angle produced by figure light source 420 to realize.
But this way is only an example, and in other embodiments of the invention, the display module further include: optically focused is saturating Mirror described dotted adopts light caused by figure light source for converging before the dotted light-emitting surface for adopting figure light source.It is described poly- The setting of optical lens can effectively reach and reduce the dotted angle of divergence for adopting light produced by figure light source, can effectively change It is apt to the display module image quality；And collector lens can independently form, be conducive to improve set collector lens at Image quality amount is conducive to the raising of display module the production yield and device performance.
With reference to Fig. 5, show that the invention shows the schematic diagram of the section structure of the 5th embodiment of mould group.
In the present embodiment, the array substrate 511 between the colored optical filtering substrates 512 and the protective layer 530, The i.e. described array substrate 511 is between the colored optical filtering substrates 512 and sensing face 531.In the liquid crystal display panel 510 The relative positional relationship of the array substrate 511 and the colored optical filtering substrates 512, can be according to the specific of the display module It is required that and set, so as to effectively realize the integrated of fingerprint recognition and image display function, advantageously ensure that the protective layer 530 thickness is conducive to maintain higher manufacturing yield, lower cost of manufacture.
The present embodiment and previous embodiment the difference is that, in the present embodiment, the display module further include: light shield layer 560, positioned at the protective layer 530 towards in the dotted part of the surface for adopting figure light source 520, the light shield layer 550 at least reveals The protective layer 530 part corresponding with the thickening layer 550 out.
The light shield layer 560 for block it is described it is dotted adopt figure light source 520, with prevent it is described it is dotted adopt figure light source 520 reveal Influence user experience out.Specifically, the light shield layer 560, which covers the protective layer 530, dotted adopts figure light source 520 towards described Surface, and be at least set to it is described it is dotted adopt position corresponding to figure light source 520, i.e., the described dotted figure light source 520 of adopting is in institute Protective layer 530 is stated to be located in the range of the light shield layer 560 towards the dotted projection adopted on 520 surface of figure light source.
On the other hand, in the present embodiment, the dotted light-emitting surface (not indicating in figure) for adopting figure light source 520 is towards the increasing The side 553 of thick-layer 550, and the light shield layer 560 only exposes the protective layer 530 portion corresponding with the thickening layer 550 Point, that is to say, that the thickening layer 550 the protective layer 530 towards the dotted projection adopted on 520 surface of figure light source with The light shield layer 560 is adjacent, thus it is described it is dotted adopt light caused by figure light source 520 through the side 553 enter the increasing Thick-layer 550 is emitted from first face 551 and is projected in the protective layer 530.
With reference to Fig. 6, show that the invention shows the schematic diagram of the section structure of mould group sixth embodiment.
In the present embodiment, the array substrate 611 between the colored optical filtering substrates 612 and the protective layer 630, The i.e. described array substrate 611 is between the colored optical filtering substrates 612 and sensing face 631.In the liquid crystal display panel 610 The relative positional relationship of the array substrate 611 and the colored optical filtering substrates 412, can be according to the specific of the display module It is required that and set, so as to effectively realize the integrated of fingerprint recognition and image display function, advantageously ensure that the protective layer 630 thickness is conducive to maintain higher manufacturing yield, lower cost of manufacture.
The present embodiment and previous embodiment the difference is that, in the present embodiment, the side 653 and first face Angle is acute angle between 651, and angle is obtuse angle between second face 651.
Specifically, the thickening layer 650 stretches out the liquid crystal display panel towards described dotted one end for adopting figure light source 620 610, and it is wedge shaped, therefore the part thickening layer 650 for stretching out the liquid crystal display panel 610 potentially acts as the effect of light guide, To increase the area of 650 side 653 of thickening layer, the intensity for being projected to light in the thickening layer 650 is improved, is conducive to The light intensity for improving formed reflected light, is conducive to the acquisition of clear fingerprint image.
Referring to figs. 1 to Fig. 6, since the dotted consistency for adopting light produced by figure light source is stronger, stray light is less, institute It is relatively high to state the signal collected noise of sensor devices, can effectively maintain the protective layer thickness, be conducive to manufacturing yield It improves；And between the sensing face and the sensor devices distance increase, can for the thickening layer, the light guide with And the setting offer of the optical devices such as described collector lens is possible, can effectively adjust the accuracy of optical path, advantageously ensure that finger Print image quality is conducive to improve image display effect, so as to preferably realize and refer under the premise of guaranteeing manufacturing yield Line identification is integrated with image display function.
With reference to Fig. 7, show that the invention shows the overlooking structure diagrams of the vertical sensing face of the 7th embodiment of mould group.
The present embodiment, the present embodiment and previous embodiment something in common, details are not described herein by the present invention.The present embodiment is with before State embodiment the difference is that, in the present embodiment, it is described it is dotted adopt figure light source 720 include two or three above LED light, institute With the display module further include: daylighting control unit 770, for controlling when the sensor devices acquire optical signal every time The dotted LED light adopted in figure light source 720 generates light.
Specifically, the dotted figure light source 720 of adopting includes 6 LED light, respectively LED light a, LED light b, LED light c, LED Lamp d, LED light e and LED light f；6 LED light are uniformly distributed in the same side of the liquid crystal display panel 710.
The sensing face 731 adopts graph region 771 including multiple.Specifically, the quantity for adopting graph region 771 is 14, Greater than the dotted quantity for adopting LED light in figure light source 720.It is described it is dotted adopt in figure light source 720 each LED light with it is multiple adjacent It is corresponding to adopt graph region 771.It is described dotted to adopt in figure light source 720 each LED light and adopt 771 phase of graph region with 4 in the present embodiment It is corresponding.Specifically, with the 1st to the 4th to adopt graph region 771 corresponding (region as shown in A in Fig. 7) by the LED light a；The LED It is corresponding (region as shown in B in Fig. 7) that lamp b with the 3rd to the 6th adopts graph region 771；Described LED light c and the 5th to the 8th is adopted figure Region 771 is corresponding (region as shown in C in Fig. 7)；The LED light d with the 7th to the 10th adopt graph region 771 it is corresponding (as scheme Region shown in D in 7)；It is corresponding (region as shown in E in Fig. 7) that the LED light e with the 9th to the 12nd adopts graph region 771；It is described It is corresponding (region as shown in F in Fig. 7) that LED light f with the 11st to the 14th adopts graph region 771.
Moreover, the quantity for adopting graph region 771 is greater than the dotted quantity for adopting LED light in figure light source 720, the point Shape adopt each LED light in figure light source 720 with multiple adjacent to adopt graph region 771 corresponding.Therefore, the adjacent LED light institute is right Answer to adopt 771 part of graph region identical, such as the 3rd and the 4th to adopt graph region 771 both corresponding with the LED light a, also with institute It is corresponding to state LED light b；9th and the 10th to adopt graph region 871 both corresponding with the LED light d, also opposite with the LED light e It answers.
In the present embodiment, the daylighting control unit 770 also respectively at the dotted LED light adopted in figure light source 720 with And the liquid crystal display panel 710 is connected, and is touched for adopting graph region 771 described in the judgement, control and the area Cai Tu Domain 771 generates light apart from nearest LED light, and controls the sensor devices in corresponding display pixel cells and acquire light, To obtain fingerprint image, so as to guarantee the fingerprint image for collecting enough large area to carry out fingerprint recognition.
In the liquid crystal display panel 710, at least partly adopted in the corresponding display pixel cells of graph region 771 with described It is provided with sensor devices.The daylighting control unit 770 includes touch-control device, can detect the sensing face 731 whether by It touches, and judges to be adopted graph region by what is touched；The daylighting control unit 770 and dotted LED adopted in figure light source 720 Lamp is connected, when being touched for adopting graph region 771 described in the judgement, control it is described it is dotted adopt it is most suitable in figure light source 720 One LED (for example, with described graph region 771 of adopting apart from nearest) generation light；The daylighting control unit 770 also with it is described Liquid crystal display panel 710 is connected, and when being touched for adopting graph region 771 described in the judgement, control adopts graph region 771 with described Sensor devices in corresponding display pixel cells acquire light, to obtain fingerprint image.
When the LED light quantity is enough, when the arrangement density of LED light is sufficiently large, the selection of suitable LED light, Neng Gouyou Effect increases the area in the sensing face by light irradiation area, can collect sufficiently large fingerprint area to guarantee fingerprint The realization of identification advantageously reduces the difficulty and complexity of fingerprint recognition.
It is accordingly interior that more structure, property and advantages in relation to the provided display module of the present embodiment can refer to previous embodiment Hold.
Although present disclosure is as above, present invention is not limited to this.Anyone skilled in the art are not departing from this It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute Subject to the range of restriction.

Claims (22)

1. a kind of display module characterized by comprising
Liquid crystal display panel, including multiple display pixel cells, the display pixel cells include through area and it is non-penetrate area, until Non- penetrate of small part display pixel cells has sensor devices in area；
It is dotted to adopt figure light source, positioned at the side of the liquid crystal display panel；
Protective layer, positioned at the liquid crystal display panel and the dotted top for adopting figure light source；
The protective layer is sensing face backwards to the liquid crystal display panel and the dotted surface for adopting figure light source, described dotted to adopt Light caused by figure light source is oblique to be projected in the protective layer, is conducted through the protective layer to the sensing face, formation is taken Reflected light with finger print information；
The sensor devices acquire the reflected light to obtain fingerprint image.
2. display module as described in claim 1, which is characterized in that the sensor devices, which have, acquires adopting for the reflected light Smooth surface；
The distance between the lighting surface and the sensing face are greater than 0.4mm.
3. display module as described in claim 1, which is characterized in that the liquid crystal display panel includes the array being oppositely arranged Substrate and colored optical filtering substrates, and the liquid crystal layer being filled between the array substrate and the colored optical filtering substrates；
The array substrate is between the colored optical filtering substrates and the sensing face；Alternatively, the colored optical filtering substrates position Between the array substrate and the sensing face.
4. display module as claimed in claim 3, which is characterized in that the colored optical filtering substrates include multiple colorized optical filtering lists Member and the black matrix being filled between the colored light-filtering units；
It is described corresponding with the colored light-filtering units through area；
It is described non-corresponding with the black matrix through area.
5. display module as claimed in claim 4, which is characterized in that the colored optical filtering substrates be located at the array substrate and Between the sensing face；
Reflected light of the sensor devices for black matrix described in acquisition of transmission.
6. display module as claimed in claim 3, which is characterized in that the liquid crystal display panel further include:
The first polarizing film and the second polarizing film being oppositely arranged, the array substrate and the colored optical filtering substrates are located at described the Between one polarizing film and second polarizing film；
Reflected light of the sensor devices for the first polarizing film described in acquisition of transmission or second polarization.
7. display module as claimed in claim 3, which is characterized in that the liquid crystal display panel further include:
Frame glue layer, the frame glue layer is between the array substrate and the colored optical filtering substrates and surrounds the liquid crystal layer；
The dotted figure light source of adopting is located at the side of the frame glue layer far from the liquid crystal layer.
8. display module as described in claim 1, which is characterized in that the dotted wavelength model for adopting light produced by figure light source It is trapped among within the scope of 700nm to 1500nm.
9. display module as described in claim 1, which is characterized in that further include: thickening layer is located at the liquid crystal display panel Between the protective layer.
10. display module as claimed in claim 9, which is characterized in that further include: there is light guide the plane of incidence and first to go out Penetrate face, the plane of incidence is towards the dotted light-emitting surface for adopting figure light source, and first exit facet is towards the protective layer；
It is described it is dotted adopt light caused by figure light source and be emitted from the light-emitting surface, enter the light guide through the plane of incidence, The light of the light guide is at least partially into from first exit face, and is projected in the protective layer.
11. display module as claimed in claim 10, which is characterized in that the light guide further includes the second exit facet, described Second exit facet is towards the thickening layer；
The light of part into the light guide is projected to the thickening layer from second exit face, and through the increasing Thick-layer is conducted to the protective layer.
12. display module as claimed in claim 10, which is characterized in that the plane of incidence is dotted to adopt figure light source towards described The curved surface of protrusion.
13. display module as claimed in claim 10, which is characterized in that the material of the light guide is light transmission glue；
The plane of incidence is in contact with the dotted light-emitting surface for adopting figure light source, the first exit facet of at least described light guide and institute Protective layer is stated to be in contact towards the dotted part of the surface for adopting figure light source.
14. display module as claimed in claim 9, which is characterized in that further include: light shield layer is located at the protective layer direction In the dotted part of the surface for adopting figure light source, it is corresponding with the thickening layer that the light shield layer at least exposes the protective layer Part.
15. display module as claimed in claim 14, which is characterized in that the light shield layer is at least set to dotted to be adopted with described The corresponding position of figure light source.
16. display module as claimed in claim 9, which is characterized in that the thickening layer has the towards the protective layer On one side and the second face towards the liquid crystal display panel, and the side in connection first face and the second face；
It is described it is dotted adopt light caused by figure light source through the side enter the thickening layer, be emitted and throw from first face It is incident upon in the protective layer.
17. display module as claimed in claim 16, which is characterized in that the side is perpendicular to first face or described Two faces；Alternatively, the angle between the side and first face is acute angle, and angle is obtuse angle between second face.
18. the display module as described in claim 9~17 any one claim, which is characterized in that the thickening layer Thickness is within the scope of 0.2mm to 0.5mm.
19. display module as described in claim 1, which is characterized in that further include: collector lens dotted adopts figure positioned at described Before the light-emitting surface of light source, described dotted light caused by figure light source is adopted for converging.
20. display module as described in claim 1, which is characterized in that the dotted figure light source of adopting is a LED light.
21. display module as described in claim 1, which is characterized in that it is described it is dotted adopt figure light source include two or three with Upper LED light；
The display module further include: daylighting control unit, for when the sensor devices acquire light every time, described in control The dotted LED light adopted in figure light source generates light.
22. display module as described in claim 1, which is characterized in that the liquid crystal display panel is based on amorphous silicon membrane The liquid crystal display panel of transistor, the liquid crystal display panel based on low-temperature polysilicon film transistor are aoxidized based on indium gallium zinc The liquid crystal display panel of object thin film transistor (TFT).
CN201710769496.2A 2017-08-31 2017-08-31 Display module Pending CN109426784A (en)

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Application publication date: 20190305