WO2019205646A1 - 指纹识别装置、显示面板及其制作方法、显示装置 - Google Patents

指纹识别装置、显示面板及其制作方法、显示装置 Download PDF

Info

Publication number
WO2019205646A1
WO2019205646A1 PCT/CN2018/119609 CN2018119609W WO2019205646A1 WO 2019205646 A1 WO2019205646 A1 WO 2019205646A1 CN 2018119609 W CN2018119609 W CN 2018119609W WO 2019205646 A1 WO2019205646 A1 WO 2019205646A1
Authority
WO
WIPO (PCT)
Prior art keywords
shielding structure
aperture
display panel
fingerprint
display
Prior art date
Application number
PCT/CN2018/119609
Other languages
English (en)
French (fr)
Inventor
朱健超
刘利宾
Original Assignee
京东方科技集团股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US16/472,438 priority Critical patent/US11354927B2/en
Publication of WO2019205646A1 publication Critical patent/WO2019205646A1/zh

Links

Images

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
    • G—PHYSICS
    • 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
    • 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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/122—Pixel-defining structures or layers, e.g. banks
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/126—Shielding, e.g. light-blocking means over the TFTs
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
    • H10K59/65—OLEDs integrated with inorganic image sensors
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/871—Self-supporting sealing arrangements
    • H10K59/8723—Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/1201—Manufacture or treatment

Definitions

  • At least one embodiment of the present disclosure relates to a fingerprint recognition device, a display panel, a method of fabricating the same, and a display device.
  • At least one embodiment of the present disclosure provides a fingerprint recognition apparatus including a fingerprint sensor, a hole-shaped aperture, and a first shielding structure.
  • the fingerprint sensor includes a plurality of sensing units; the aperture stop is disposed on the light incident side of the fingerprint sensor and includes a hole through which the light is allowed to be incident on the at least one sensing unit of the fingerprint sensor; the first shielding A structure is disposed on a side of the apertured aperture that faces away from the fingerprint sensor and at least partially surrounds the aperture.
  • the first shielding structure is light transmissive and includes a first opening exposing the hole; a first side of the first shielding structure adjacent to the hole
  • the angle between the outer surface and the plane in which the apertured aperture is located is an obtuse angle.
  • the first shielding structure is opaque and includes a first opening exposing the hole.
  • the first shielding structure is transparent and covers the hole.
  • the fingerprint recognition apparatus further includes: a second shielding structure covering at least a second side of the first shielding structure away from the hole and including a second opening corresponding to the hole.
  • the second shielding structure is light transmissive; a cut surface of the second side or the second side of the first shielding structure and the aperture stop The angle between the planes is an obtuse angle; the refractive index of the second shielding structure is greater than the refractive index of the first shielding structure.
  • the second side surface of the second shielding structure is a curved surface facing the concave near the second shielding structure, and the tangent of the curved surface and the aperture stop
  • the angle between the planes is an obtuse angle.
  • the apertured aperture includes an opaque material.
  • the first shielding structure is configured to reduce or block ambient light incident to the at least one sensing unit via the hole.
  • At least one embodiment of the present disclosure further provides a display panel, which includes any of the fingerprint recognition devices provided by the embodiments of the present disclosure.
  • a display panel further includes: a display pixel array including a plurality of pixel units arranged in an array; wherein the first shielding structure and the holes are disposed in the plurality of pixel units The gap between them.
  • the first shielding structure is further configured as a pixel defining layer of each of the pixel units of the display pixel array.
  • the first shielding structure is further configured as a spacer for supporting the display array.
  • the fingerprint identification device further includes a second shielding structure configured as a spacer for supporting the display pixel array.
  • the display pixel array includes a conductive layer at least in the pixel unit, and the apertured aperture is located in the same layer as the conductive layer.
  • a display panel further includes a base substrate, the apertured aperture is located on the base substrate, and the fingerprint sensor is located in the apertured aperture and the substrate between.
  • At least one embodiment of the present disclosure further provides a display device including any display panel provided by an embodiment of the present disclosure.
  • At least one embodiment of the present disclosure further provides a method for fabricating a display panel, the method for fabricating a display panel, comprising: providing a fingerprint sensor, the fingerprint sensor comprising a plurality of sensing units; forming the hole on a light incident side of the fingerprint sensor
  • the apertured aperture includes a hole; a first shielding structure is formed on a side of the apertured aperture that faces away from the fingerprint sensor, wherein the first shielding structure surrounds at least a portion of the aperture.
  • a method for fabricating a display panel according to an embodiment of the present disclosure may further include: forming a second shielding structure on the first shielding structure and the aperture stop, wherein the second shielding structure covers at least the first A second side of the shielding structure remote from the aperture and including a second opening corresponding to the aperture.
  • FIG. 1 is a schematic plan view of a fingerprint identification device according to an embodiment of the present disclosure
  • Figure 2A is a schematic cross-sectional view taken along line A-A' of Figure 1;
  • FIG. 2B is a partial cross-sectional view of another fingerprint identification device according to an embodiment of the present disclosure.
  • FIG. 2C is a partial cross-sectional view of still another fingerprint identification device according to an embodiment of the present disclosure.
  • 2D is a partial cross-sectional view of still another fingerprint identification device according to an embodiment of the present disclosure.
  • FIG. 2E is a partial cross-sectional view of still another fingerprint identification device according to an embodiment of the present disclosure.
  • 2F is a block diagram of a driving principle of an image sensor according to an embodiment of the present disclosure.
  • 3A is a schematic plan view of a display panel according to an embodiment of the present disclosure.
  • FIG. 3B is a schematic plan view showing an area in which a sensing unit is disposed in a display panel according to an embodiment of the present disclosure
  • 3C is a schematic plan view showing another area of a display panel in which a sensing unit is disposed according to an embodiment of the present disclosure
  • FIG. 3D is a schematic plan view showing another area in which a sensing unit is disposed in a display panel according to an embodiment of the present disclosure
  • Figure 4A is a schematic cross-sectional view taken along line B-B' of Figure 3B;
  • FIG. 4B is a partial cross-sectional view of a display panel according to an embodiment of the present disclosure.
  • 4C is a partial cross-sectional view showing another display panel according to an embodiment of the present disclosure.
  • 4D is a partial cross-sectional view showing still another display panel according to an embodiment of the present disclosure.
  • 4E is a partial cross-sectional view showing still another display panel according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic diagram of an optical path when the display panel shown in FIG. 4B performs fingerprint recognition
  • FIG. 6 is a schematic diagram of a display device according to an embodiment of the present disclosure.
  • FIGS. 7A-7I are schematic diagrams of a method for fabricating a display panel according to an embodiment of the present disclosure.
  • FIGS. 8A-8C are schematic diagrams showing another method of fabricating a display panel according to an embodiment of the present disclosure.
  • FIGS. 9A-9C are schematic diagrams showing still another method of fabricating a display panel according to an embodiment of the present disclosure.
  • At least one embodiment of the present disclosure provides a fingerprint recognition apparatus including a fingerprint sensor, a hole-shaped aperture, and a first shielding structure.
  • the fingerprint sensor includes a plurality of sensing units; the apertured aperture is disposed on the light incident side of the fingerprint sensor and includes a hole through which the light is allowed to be incident on the sensing unit of the fingerprint sensor; the first shielding structure is disposed And a side of the apertured aperture facing away from the fingerprint sensor and at least partially surrounding the aperture.
  • FIG. 1 is a schematic plan view of a fingerprint identification device according to an embodiment of the present disclosure
  • FIG. 2A is a cross-sectional view taken along line A-A' of FIG. 1.
  • the fingerprint recognition apparatus 10 includes a fingerprint sensor 3, a apertured aperture 2, and a first shielding structure 4.
  • the fingerprint sensor 3 includes at least one sensing unit 301.
  • a plurality of sensing units 301 are arranged in an array.
  • the aperture stop 2 is disposed on the light incident side of the fingerprint sensor 3 and includes a hole 5 through which light is allowed to be incident on at least one sensing unit 301 of the fingerprint sensor 3, so that the sensor 3 can perform fingerprint recognition.
  • the fingerprint sensor 3 includes a plurality of apertures 5 arranged in an array, each aperture 5 corresponding to each sensing unit 301, ie, an orthographic projection of each aperture 5 on the base substrate 1.
  • each sensing unit 301 on the base substrate 1 coincides to enable light to be incident through the aperture 5 to the sensing unit 301 and received by the sensing unit 301.
  • the fingerprint sensor 3 is a light sensor capable of sensing light and converting the optical signal into an electrical signal.
  • the sensing unit 301 processes the received optical signal to convert the optical signal into an electrical signal output.
  • ambient light typically also enters the sensing unit 301 through the aperture 5, thereby interfering with the optical signal used for fingerprint recognition (light reflected by the finger).
  • Ambient light that interferes with fingerprint recognition is hereinafter referred to as disturbing light.
  • the first shielding structure 4 is disposed on a side of the aperture-shaped aperture 2 facing away from the fingerprint sensor 3, and the first shielding structure 4 is at least partially Around the hole 5.
  • the first shielding structure 4 can block at least part of the ambient light around the hole 5 from entering the hole 5, thereby reducing the interference light incident on the sensing unit 301 via the hole 5, improving the accuracy of the sensor for fingerprint recognition, and enabling the user to obtain more Good fingerprint recognition experience.
  • FIG. 1 and FIG. 2A the first shielding structure 4 is disposed on a side of the aperture-shaped aperture 2 facing away from the fingerprint sensor 3, and the first shielding structure 4 is at least partially Around the hole 5.
  • the first shielding structure 4 can block at least part of the ambient light around the hole 5 from entering the hole 5, thereby reducing the interference light incident on the sensing unit 301 via the hole 5, improving the accuracy of the sensor for fingerprint recognition, and enabling the user to obtain more Good fingerprint recognition experience.
  • the apertured aperture 2 is disposed on the base substrate 1
  • the fingerprint sensor 3 is disposed on a side of the base substrate 1 facing away from the apertured aperture 2
  • the first shielding structure 4 is disposed in the apertured shape.
  • the fingerprint sensor 3 may also be located between the base substrate 1 and the aperture stop 2, and other structures are the same as those shown in FIG. 2A.
  • the first shielding structure 4 surrounds the entire hole 5 , and in other embodiments of the present disclosure, the first shielding structure 4 may also partially surround the hole 5 , ie, the first shielding.
  • the structure 4 surrounds a portion of the outer contour of the aperture 5 to at least partially reduce the interfering light incident into the sensing unit 301 via the aperture 5.
  • the first shield structure 4 can be opaque and includes a first opening 701 that exposes the aperture 5.
  • the material of the first shield structure may be an organic material that does not transmit light, such as a black resin, such as a resin material to which black shading particles are added, or the like.
  • the first shielding structure 4 may also be light transmissive, and the light transmissive first shielding structure 4 also has a certain degree of blocking effect on the interference light, thereby reducing incidence through the aperture 5 .
  • the material of the first shielding structure may be an inorganic material or an organic material such as silicon nitride, silicon oxide, silicon oxynitride, a light transmissive resin material, or the like. It should be noted that the material of the first shielding structure is not limited to the above-listed types.
  • the first shield structure 4 may be in the shape of a doughnut (the columnar profile perpendicular to the base substrate 1 is columnar) to block the disturbing light around the hole 5.
  • the surface of the first shielding structure 4 remote from the aperture-shaped aperture 2 is a curved surface 403 that protrudes away from the aperture-shaped aperture 2, and the curved surface 403 can better block the interference light in all directions.
  • the surface of the first shielding structure 4 away from the aperture-shaped aperture 2 is also a flat surface, which is not limited by the embodiment of the present disclosure.
  • the first shielding structure 4 is transparent and includes a first opening 701 exposing the hole 5, and the first shielding structure 4 is close to The outer angle ⁇ between the first side 401 of the hole 5 and the plane of the aperture stop 2 is an obtuse angle.
  • the first shielding structure 4 forms a total reflection structure with the air to reduce the interference light entering the hole, and has a simple structure and is easy to manufacture. As shown in FIG.
  • FIG. 2C is a partial cross-sectional view of still another fingerprint recognition device according to an embodiment of the present disclosure.
  • the first shielding structure 4 is light transmissive and covers the aperture 5, ie a portion of the first shielding structure 4 is located in the aperture 5.
  • the fingerprint recognition device shown in FIG. 2C has a simple structure and is easy to manufacture. When the fingerprint recognition is performed, the light reflected by the finger is transmitted through the first shielding structure 4 to enter the hole 5, and then incident on the sensing unit 301 to realize fingerprint recognition. In this case, the portion of the first shield structure 4 surrounding the hole 5 can reduce the interference light incident on the sensing unit through the hole 5 by the occlusion function, thereby improving the accuracy of the fingerprint recognition device.
  • the fingerprint identification device 10 further includes a second shielding structure 6 covering at least the second side 402 of the first shielding structure 4 away from the aperture 5 and including the corresponding to the aperture 5 Two openings 702.
  • the first shielding structure 4 is light transmissive. When fingerprinting is performed, the light reflected by the finger enters the first shielding structure 4 to enter the hole 5, and then passes through the hole 5 and then enters the sensing unit 301 to implement the fingerprint. Identification. Since the second shielding structure 6 has the second opening 702 corresponding to the hole 5, it is possible to prevent the light reflected by the finger from passing through the second shielding structure 6 before entering the first shielding structure 4 to improve the utilization efficiency of light.
  • the second shielding structure 6 is opaque, and is not transparent on the basis of the blocking effect of the portion of the first shielding structure 4 surrounding the hole 5 on the interference light.
  • the second shielding structure 6 of the light has a further blocking effect on the interference light, and the interference light incident on the sensing unit 301 via the aperture 5 can be reduced, thereby improving the accuracy of fingerprint recognition of the fingerprint sensor.
  • the material of the second shield structure 6 may be, for example, an organic material that is opaque to light, such as a black resin, such as a resin material to which black shading particles are added.
  • the material of the second light shielding structure that is opaque is not limited to the above types.
  • the second shield structure 6 is light transmissive, and the angle between the second side 402 of the first shield structure 4 and the plane in which the aperture stop 2 is located ⁇ is an obtuse angle, and the refractive index of the second shield structure 6 is greater than the refractive index of the first shield structure 4 to constitute total reflection.
  • the refractive index of the second shielding structure 6 is greater than the refractive index of the first shielding structure 4, when the interference light is incident through the second shielding structure 6 to the second side 402 of the first shielding structure 4, the full satisfaction is satisfied.
  • the reflected condition light can be totally reflected on the second side 402 of the first shield structure 4, thereby reducing the interference light that the via 5 is incident on the sensing unit.
  • the angle ⁇ between the second side 402 of the first shielding structure 4 and the plane of the aperture stop 2 is an obtuse angle, which can increase the incidence from the second shielding structure 6 to the first An incident angle of light of the second side 402 of the shield structure 4 such that more light can be totally reflected on the second side 402 of the first shield structure 4 to reduce interference light entering the sensing unit through the aperture 5, Thereby improving the accuracy of the fingerprint recognition device.
  • the material of the second shielding structure 6 may be silicon dioxide, silicon nitride or titanium dioxide having a higher refractive index; the material of the first shielding structure 4 may be fluorine having a lower refractive index.
  • Magnesium, porous silica or fluorosilicon oxide may be used as the material of the second shield structure 6 and the material of the first shield structure 4 as long as the above requirements are met.
  • FIG. 2E is a partial cross-sectional view of still another fingerprint recognition device according to an embodiment of the present disclosure.
  • the second side surface 402 of the first shielding structure 4 is a curved surface that is convex toward the second shielding structure 6.
  • the tangent of the curved surface is between the plane of the aperture-shaped aperture 2
  • the angle ⁇ is an obtuse angle.
  • the curvatures of the respective positions of the second side surface 402 of the first shielding structure 4 are different, it is advantageous to make the direction along the second side surface 402 beveled.
  • the interference light incident from the second shielding structure 6 to the second side surface 402 of the first shielding structure 4 is totally reflected, so that more interference light can be prevented from entering the sensing unit through the hole 5, thereby improving the accuracy of the fingerprint identification device. degree.
  • the apertured aperture includes an opaque material, such as a portion of the apertured aperture other than the aperture comprising an opaque material.
  • the opaque material may be formed of an opaque material.
  • the opaque material may be, for example, an opaque inorganic material such as a metal material or alloy such as aluminum, chromium, copper, aluminum alloy, nickel alloy, copper alloy, or the like.
  • the opaque material may be, for example, an organic material such as a black resin.
  • the material of the apertured aperture may comprise a photosensitive material such that the apertured aperture can be easily fabricated by photolithographic methods.
  • the photosensitive material may include a photoresist material or a metal halide such as a silver halide (for example, AgCl or AgBr).
  • a hole-shaped aperture may be formed through an exposure-development process, and the metal halide may decompose to form metal particles after exposure, and the metal particles may appear black due to small particles to achieve a hole-like aperture other than the aperture.
  • Part of the material is opaque.
  • the material of the apertured aperture is not limited to the above-mentioned ones, and the material of the portion other than the aperture of the apertured aperture is not limited as long as it is an opaque material.
  • the sensing unit 301 may include components such as a photoelectric conversion element (for example, a photodiode, a phototransistor, etc.) and a switching transistor electrically connected to the photoelectric conversion element, and the photoelectric conversion element may convert an optical signal irradiated thereto into an electrical signal.
  • the switching transistor can control whether to read an electrical signal obtained by collecting an optical signal on the photoelectric conversion element.
  • the photodiode is a photodiode.
  • the fingerprint identification device further includes a fingerprint recognition detection module and a processor.
  • 2F is a block diagram of a driving principle of an image sensor according to an embodiment of the present disclosure.
  • the fingerprint recognition driving module may be a fingerprint recognition driving circuit
  • the fingerprint recognition driving circuit includes a fingerprint identification row driving circuit and a fingerprint identification column driving circuit.
  • the fingerprint recognition driving circuit row driving circuit includes a plurality of sensing gate lines respectively connected to the respective sensing units 301 arranged in an array
  • the fingerprint identification column driving circuit includes respectively connected to the respective sensing units 301 arranged in an array.
  • a plurality of sensing data lines are provided to provide a scanning signal for the sensing unit 301.
  • the fingerprint recognition detection module may be a fingerprint recognition detection circuit that is connected to each sensing unit 301 of the fingerprint sensor to read an electrical signal from the sensing unit 301.
  • the fingerprint recognition detection circuit is coupled to the processor signal, and the fingerprint recognition detection circuit transmits the electrical signal to the processor, and the processor processes the received electrical signal, for example, the electrical signal corresponds to a pre-stored standard fingerprint.
  • the data signals are compared to achieve fingerprint recognition.
  • the processor can be a digital signal processor (DSP), a programmable logic controller (PLC), or the like.
  • DSP digital signal processor
  • PLC programmable logic controller
  • the fingerprint recognition driving circuit and the fingerprint recognition detecting circuit may be prepared on the same substrate as the sensing unit 301, or separately provided and electrically connected to each sensing unit 301.
  • the driving structure of the fingerprint sensor, the fingerprint identification detecting structure, and the type and connection mode of the processor are not limited to the above examples, and the embodiments of the present disclosure are not limited thereto, and those skilled in the art may refer to the prior art in the art.
  • At least one embodiment of the present disclosure further provides a display panel, which includes any of the fingerprint recognition devices provided by the embodiments of the present disclosure.
  • FIG. 3A is a schematic plan view of a display panel according to an embodiment of the present disclosure
  • FIG. 3B is a schematic plan view of a region in which a sensing unit is disposed in a display panel according to an embodiment of the present disclosure.
  • FIG. 3D is a schematic plan view showing another area in which a sensing unit is disposed in a display panel according to an embodiment of the present disclosure. .
  • the display panel 11 further includes a display pixel array 8.
  • a fingerprint sensor may be disposed in a region 13 of the display panel provided with a sensing unit for receiving light reflected by the finger.
  • the area 13 provided with the sensing unit may correspond to a partial area of the display pixel array 8 of the display panel 11.
  • the area 13 provided with the sensing unit may also correspond to the entire display pixel array 8 of the display panel 11 to increase the photosensitive area of the fingerprint sensor, thereby achieving a better fingerprint recognition effect.
  • the display pixel array 8 includes a plurality of pixel units 801 arranged in an array, a first shield structure (not shown in FIGS. 3B-3D) and a hole 5 disposed between the pixel units 801. Clearance.
  • the position of the hole 5 in the apertured aperture 2 can be set according to the actual application requirements, and the embodiment of the present disclosure does not specifically limit this.
  • each of the holes 5 may be disposed between two adjacent pixel units 801; for example, as shown in FIG. 3C, each of the holes 5 may be disposed in adjacent four pixel units 801. Further, for example, as shown in FIG. 3D, each of the three pixel units 801 may correspond to one hole 5, whereby the number of sets of the sensing unit 301 and the manufacturing cost can be reduced.
  • the position at which the hole 5 is formed in the apertured aperture 2 is not limited to the above.
  • FIG. 3B is a cross-sectional view taken along line BB' of FIG. 3B
  • FIG. 4B is a partial cross-sectional view of a display panel according to an embodiment of the present disclosure
  • FIG. 4C is another display according to an embodiment of the present disclosure.
  • the display pixel array 8 includes a plurality of pixel units 801 distributed in an array and display elements at least in the pixel unit 801, the display elements including a conductive layer, that is, the display pixel array 8 includes at least A conductive layer in the pixel unit 801.
  • the display panel 11 is an organic light emitting diode display panel, and the disclosure is described by way of example.
  • the display element may be an organic light emitting diode device, and the organic light emitting diode device may be a structure such as a top emission, a bottom emission, or the like.
  • the organic light emitting diode device includes a first electrode 802, an organic light emitting layer 803, and a second electrode 804.
  • the first electrode 802 and the second electrode 804 are the conductive layers.
  • the first electrode 802 is disposed on the base substrate 1.
  • the first electrode 802 may be disposed on the aperture stop 2.
  • the organic light emitting layer 803 is disposed on the first electrode 802.
  • the second electrode 804 is a common electrode that covers the organic light emitting layer 803, the first shield structure 4, and the second shield structure 6.
  • the display panel is not limited to being an organic light emitting display panel, and correspondingly, the display element is not limited to the above-described organic light emitting diode device.
  • the display panel 11 also includes a display driving circuit.
  • the display driving circuit includes a signal line or the like, for example, a plurality of display gate lines and display data lines (not shown) connected to each pixel unit of the display pixel array to provide scan signals and data signals for the pixel units of the display pixel array.
  • the fingerprint recognition row driving circuit and the fingerprint identification column driving circuit of the display driving circuit and the image sensor can all refer to conventional designs in the art, for example, the row driving circuit and the column driving circuit can be integrated in the same control circuit or chip, the present disclosure The embodiment does not limit this.
  • the first electrode 802 can be an anode and the second electrode 804 can be a cathode.
  • the anode when the anode is a common electrode, when the display panel 11 performs a display function, a low-level signal is input to the common electrode through the display driving circuit.
  • the anode may be a reflective electrode or a reflective layer (not shown) disposed adjacent to the anode, during which light exits from the cathode side for display.
  • the second electrode 804 may also be an anode, the first electrode 802 being a cathode, for example, the anode being a common electrode.
  • a high level signal is input to the common electrode through the display drive circuit.
  • the display pixel array 8 further includes a pixel defining layer defining a plurality of pixel units to prevent crosstalk between adjacent pixel units or adjacent pixel units.
  • the pixel defining layer includes an opening corresponding to the pixel unit 801, and the organic light emitting layer 803 is disposed at least in the opening, for example, the common electrode covers the pixel defining layer.
  • the first shielding structure 4 can also be configured as a part of the pixel defining layer, so that the first shielding structure does not need to be additionally provided to achieve the effect of simplifying the structure of the display panel.
  • the first shielding structure 4 is light transmissive, that is, the pixel defining layer is light transmissive, however, since the second shielding structure 6 and the first shielding structure 4 constitute a total reflection structure, it may be improved or A problem of preventing crosstalk between light between adjacent pixel units or adjacent pixel units. At the same time, compared with the display panel in which the pixel defining layer is opaque, it is advantageous to increase the aperture ratio of the display panel.
  • the second shielding structure 6 may also be configured as a spacer for supporting the display pixel array, for example, a spacer for supporting the encapsulation layer 9, for example, the encapsulation layer 9 is a package cover, etc. .
  • the display panel 11 may also be a liquid crystal display panel
  • the second shielding structure 6 may also be configured as a column spacer in the liquid crystal display panel for supporting the base substrate and the opposite substrate of the liquid crystal display panel.
  • the first shielding structure when the first shielding structure is the structure shown in FIG. 2A or 2B, the first shielding structure may also be configured as the spacer.
  • the fingerprint sensor 3 is located on the side of the base substrate 1 away from the aperture stop 2.
  • the fingerprint sensor 3 may also be located between the apertured aperture 2 and the base substrate 1, such that when fingerprinting is performed, the light reflected by the finger is directly after passing through the aperture 5.
  • the loss of this portion of light can be reduced, thereby improving the accuracy of fingerprint recognition.
  • the other structures of the display panel 11 shown in FIG. 4B are the same as those in FIG. 4A. Please refer to the previous description, and details are not described herein again.
  • the apertured aperture may be in the same layer as the conductive layer of the display pixel array.
  • the aperture stop 2 is located in the same layer as the first electrode 802, that is, both the aperture aperture 2 and the first electrode 802 are located on the fingerprint sensor 3 and both are associated with the fingerprint sensor 3.
  • the top surface of the contact, or the aperture stop 2 is in the same plane as the top surface of the first electrode 802.
  • the fingerprint identification device includes any one of the first shielding structures shown in FIGS. 2A-2C without including the second shielding structure.
  • the fingerprint recognition device in the display panel 11 may include the first shield structure 4 shown in FIG. 2B, and the first shield structure 4 is also configured as a spacer.
  • the fingerprint recognition device in the display panel 11 may include the first shield structure 4 shown in FIG. 2C, and the first shield structure 4 is also configured as a pixel defining layer.
  • the other structures of the display panel 11 shown in FIGS. 4D and 4E are the same as those in FIG. 4A, please refer to the previous description.
  • FIG. 5 is a schematic diagram of an optical path when the display panel shown in FIG. 4B performs fingerprint recognition.
  • the following is an example of the display panel shown in FIG. 4B.
  • the fingerprint identification optical path and effect of the display panel provided by other embodiments are similar.
  • the finger touches the fingerprint recognition area corresponding to the display pixel array of the display panel, and the light emitted from the organic light-emitting layer 803 is incident on the surface of the finger that is in contact with the display panel 11.
  • the first shielding structure 4 and the second screen shielding structure 6 are respectively capable of blocking at least a portion of the interference light around the aperture 5 (light that is not reflected by the finger, such as ambient light, backlight, light from the organic light-emitting layer, etc.) Incident to the hole 5, thereby reducing interference light incident to the fingerprint sensor 3 via the hole 5; on the other hand, the first shielding structure 4 and the second shielding structure 6 form a total reflection structure, and a part is incident from the second light shielding structure 6 to the first The interference light of a shield structure 4 can be totally reflected on the second side 402 of the first shield structure 4, thereby reducing disturbing light entering the sensing unit through the aperture 5. Therefore, in the display panel provided by the embodiment of the present disclosure, the accuracy of fingerprint recognition can be improved, which can enable
  • the light incident on the finger may also be light from a backlight or the like.
  • At least one embodiment of the present disclosure further provides a display device including any display panel provided by an embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram of a display device according to an embodiment of the present disclosure.
  • the display device 12 includes any of the display panels 11 provided by the embodiments of the present disclosure.
  • the display device may be an organic light emitting diode display device, a liquid crystal display device, or the like.
  • the display device can be implemented as a product, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, an electronic advertisement screen, or the like.
  • FIG. 6 is a schematic diagram of a display device including any of the display panels provided by the embodiments of the present disclosure. Other structures of the display device are not shown, and those skilled in the art may refer to the conventional technology, which is not limited in this embodiment.
  • the display device provided by the embodiment of the present disclosure can implement fingerprint recognition in an area corresponding to the display pixel array, that is, perform fingerprint identification in the display area.
  • the display device provided by the embodiment of the present disclosure can reduce or prevent interference light from entering the fingerprint sensor when performing fingerprint recognition, so that the accuracy of fingerprint recognition can be improved, which can enable the user to obtain a better fingerprint recognition experience.
  • At least one embodiment of the present disclosure further provides a method for fabricating a display panel, the method for fabricating a display panel, comprising: providing a fingerprint sensor, the fingerprint sensor comprising a plurality of sensing units; forming the hole on a light incident side of the fingerprint sensor
  • the apertured aperture includes a hole; a first shielding structure is formed on a side of the apertured aperture that faces away from the fingerprint sensor, wherein the first shielding structure surrounds at least a portion of the aperture.
  • FIG. 7A-7I is a schematic diagram of a method for fabricating a display panel according to an embodiment of the present disclosure.
  • a base substrate 1 and a fingerprint sensor 3 are provided.
  • the fingerprint sensor 3 includes a plurality of sensing units. For example, multiple sensing units are arranged in an array.
  • the fingerprint sensor 3 is placed on the base substrate 1, or the fingerprint sensor 3 is fabricated directly on the base substrate 1 by a semiconductor process or the like.
  • a pixel circuit (not shown) for driving the organic light emitting diode device may be formed on the base substrate 1, which includes a plurality of thin film transistors, storage capacitors, and the like, and the preparation method thereof may be any known in the art. Methods, materials, etc., will not be described here.
  • a pre-formed pupil layer 201 for forming an array of holes is formed on the fingerprint sensor 3.
  • the material of the pre-formed pupil layer 201 includes an opaque material, for example, it may be an opaque inorganic material such as a metal material or alloy such as aluminum, chromium, copper, aluminum alloy, nickel alloy, copper alloy, or the like.
  • the opaque material may, for example, also be an organic material such as a black resin.
  • the material of the pre-formed pupil layer 201 may also be a photosensitive material, so that the apertured aperture can be easily fabricated.
  • the photosensitive material may include a photoresist material or a metal halide such as a silver halide (for example, AgCl or AgBr).
  • the material of the pre-formed aperture layer is not limited to the above-listed types, and the embodiment of the present disclosure does not limit this.
  • the material of the pre-formed pupil layer 201 is an organic material, for example, it may be formed by a coating method; when the material of the pre-formed pupil layer 201 is an inorganic material, for example, it may be formed by a deposition method, such as magnetron sputtering. Deposition, chemical vapor deposition, etc., a person skilled in the art can select a suitable fabrication method according to the specific material of the pre-formed pupil layer 201.
  • an aperture array is formed by using a pre-fabricated pupil layer 201 by a patterning process, thereby forming a hole-shaped aperture 2 including a plurality of apertures 5 arranged in an array on the light incident side of the fingerprint sensor 3.
  • the holes 5 can be formed using a photolithography process.
  • the material of the pre-formed pupil layer 201 is a photosensitive material including a photoresist material and a metal halide (for example, AgCl or AgBr)
  • the apertured aperture 2 can be formed by an exposure-development process in conjunction with a mask.
  • the metal halide decomposes after exposure to form metal particles which appear black due to the small particles, so that the material of the portion other than the holes 5 of the apertured aperture is opaque.
  • the aperture-shaped aperture 2 can be formed by a process of exposure-developing-etching-ashing.
  • the patterning process for forming the hole array layer is not limited to the above categories.
  • a first light shielding layer 404 for forming a first shielding structure is formed on the aperture stop 2.
  • the material of the first light shielding layer 404 can refer to the description of the material of the previous first shielding structure.
  • the material of the first light shielding layer 404 is an organic material, for example, it may be formed by a coating method; when the material of the first light shielding layer 404 is an inorganic material, for example, it may be formed by a deposition method, such as magnetron control. Sputter deposition, chemical vapor deposition, etc., a person skilled in the art can select a suitable fabrication method according to the specific material of the first light shielding layer 404.
  • a first shielding structure 4 is formed by a patterning process using a first light shielding layer 404, such as a photolithography process or the like.
  • the first shielding structure 4 is light transmissive, including a portion surrounding the aperture 5, and the first shielding structure 4 covers the aperture 5.
  • the angle ⁇ between the tangent to the second side 402 of the first shield structure 4 and the plane in which the aperture stop 2 is located is an obtuse angle.
  • the first light shielding layer 404 is etched and patterned by a wet etching method, so that an under-cut configuration can be realized.
  • the light reflected by the finger is transmitted through the first shielding structure 4 to enter the hole 5, and then incident on the sensing unit of the sensor to realize fingerprint recognition.
  • the portion of the first shield structure 4 surrounding the hole 5 can reduce the interference light incident on the sensing unit through the hole 5 by the occlusion function, thereby improving the accuracy of the fingerprint recognition device.
  • a second light shielding layer 601 for forming a second shielding structure is formed on the first shielding structure 4 and the aperture stop 2.
  • the material of the second light shielding layer 601 can refer to the description of the material of the previous second shielding structure.
  • the material of the second light shielding layer 601 is an organic material, for example, it may be formed by a coating method; when the material of the second light shielding layer 601 is an inorganic material, for example, it may be formed by a deposition method, such as magnetron control. Sputter deposition, chemical vapor deposition, etc., a person skilled in the art can select a suitable fabrication method according to the specific material of the second light shielding layer 601.
  • the first shielding structure 4 is formed by a patterning process using a second light shielding layer 601, such as a photolithography process or the like.
  • the second shielding structure 6 covers at least the second side 402 of the first shielding structure 4 remote from the aperture 5 and includes a second opening 702 corresponding to the aperture 5.
  • the second shielding structure 6 is light transmissive, and the refractive index of the second shielding structure 6 is greater than the refractive index of the first shielding structure 4 to constitute total reflection.
  • the angle ⁇ between the tangent of the second side surface 402 of the first shielding structure 4 and the plane in which the aperture stop 2 is located is an obtuse angle, this can increase the incidence of the second shielding structure 6 incident on the first shielding structure 4
  • the incident angle of the light of the two side faces 402 therefore, more light can be totally reflected on the second side 402 of the first shielding structure 4 to reduce the interference light entering the sensing unit through the hole 5, thereby improving the fingerprint identification device Accuracy.
  • the materials of the first shielding structure and the second shielding structure may refer to the previous description, and details are not described herein again.
  • the display panel fabrication method further includes forming a display function device, such as an organic light emitting diode device, at least in the display pixel unit 801.
  • a first electrode 802, an organic light emitting layer 803, and a second electrode 804 are sequentially formed to form an organic light emitting diode device.
  • the second electrode 804 is a common electrode covering the organic light emitting layer 803, the first shield structure 4, and the second shield structure 6.
  • a first electrode 802, an organic light emitting layer 803, and a second electrode 804 can be formed by those skilled in the art using conventional techniques in the art.
  • the organic light emitting device is packaged using the encapsulation layer 9 to obtain the display panel 11.
  • the encapsulation layer 9 can be a thin film encapsulation layer or a package cover.
  • a sealing filling material or a sealant may also be used in the packaging process, which is not shown in the drawings of the embodiments of the present disclosure, and those skilled in the art may adopt conventional techniques.
  • the first shielding structure 4, the second shielding structure 6, and the holes 5 are disposed in a gap between the pixel units 801.
  • the aperture ratio of the display panel 11 is not affected;
  • the first shielding structure 4 is also configured to display a pixel defining layer of the pixel array defining each pixel unit, and the second shielding structure 6 is further configured to display
  • a spacer for supporting the pixel array, such as a spacer, is used to support the encapsulation layer 9, for example, the encapsulation layer 9 is a package cover. In this way, it is not necessary to additionally provide a pixel defining layer and a spacer to simplify the structure of the display panel.
  • FIGS. 8A-8C are schematic diagrams showing another method of fabricating a display panel according to an embodiment of the present disclosure.
  • the method differs from the method shown in FIGS. 7A-7I in that, as shown in FIG. 8A, after the process illustrated in FIGS. 7A-7D is completed, the first light shielding layer 404 is patterned to form a structure as shown in FIG. 8A.
  • the first shielding structure 4 surrounds the entire aperture 5 and includes a first opening 701 that exposes the aperture 5 .
  • the first shielding structure 4 may also partially surround the aperture 5 , ie the first shielding structure 4 surrounds the aperture 5 . Part of the outer contour.
  • the first shielding structure 4 may be opaque or light-transmissive, and the blocking effect of the first shielding structure 4 on the light may reduce the interference light incident on the sensing unit 301 via the aperture 5, thereby improving the fingerprint sensor.
  • the accuracy of fingerprint recognition can be referred to the previous description.
  • a first electrode 802, an organic light-emitting layer 803, and a second electrode 804 which are at least located in the pixel unit 801 are sequentially formed.
  • the second electrode 804 is a common electrode covering the organic light-emitting layer 803, the first shield structure 4, and the second shield structure 6.
  • a first electrode 802, an organic light emitting layer 803, and a second electrode 804 can be formed by those skilled in the art using conventional techniques in the art.
  • the organic light emitting device is packaged using the encapsulation layer 9 to obtain the display panel 11.
  • the encapsulation layer 9 can be a thin film encapsulation layer or a package cover.
  • a sealing filling material or a sealant may also be used in the packaging process, which is not shown in the drawings of the embodiments of the present disclosure, and those skilled in the art may adopt conventional techniques.
  • the second shielding structure 6 is further configured to display the supporting spacers of the pixel array to simplify the structure of the display panel.
  • FIGS. 9A-9C are schematic diagrams showing still another method of fabricating a display panel according to an embodiment of the present disclosure.
  • the method differs from the method shown in FIGS. 7A-7I in that, as shown in FIG. 9A, after the process illustrated in FIGS. 7A-7D is completed, the first light shielding layer 404 is patterned to form a phase as shown in FIG. 9A.
  • the first shielding structure 4 is light transmissive, including a portion surrounding the aperture 5, and the first shielding structure 4 covers the aperture 5.
  • the portion of the first shield structure 4 surrounding the hole 5 can reduce the interference light incident on the sensing unit through the hole 5 by the occlusion function, thereby improving the accuracy of the fingerprint recognition device.
  • the first electrode 802, the organic light-emitting layer 803, and the second electrode 804 which are located at least in the pixel unit 801 are sequentially formed.
  • the second electrode 804 is a common electrode covering the organic light emitting layer 803, the first shield structure 4, and the second shield structure 6.
  • a first electrode 802, an organic light emitting layer 803, and a second electrode 804 can be formed by those skilled in the art using conventional techniques in the art.
  • the organic light emitting device is packaged using the encapsulation layer 9 to obtain the display panel 11.
  • the encapsulation layer 9 can be a thin film encapsulation layer or a package cover.
  • a sealing filling material or a sealant may also be used in the packaging process, which is not shown in the drawings of the embodiments of the present disclosure, and those skilled in the art may adopt conventional techniques.
  • the first shielding structure 4 is further configured to display a pixel defining layer of the pixel array defining each pixel unit to simplify the structure of the display panel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Human Computer Interaction (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Manufacturing & Machinery (AREA)
  • Vascular Medicine (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Image Input (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

一种指纹识别装置、显示面板及其制作方法、显示装置。该指纹识别装置(10)包括指纹传感器(3)、孔状光阑(2)和第一屏蔽结构(4)。指纹传感器(3)包括多个传感单元(301)；孔状光阑(2)设置于所述指纹传感器(3)的入光侧且包括孔(5)，所述孔(5)允许光经由其入射至所述指纹传感器(3)的至少一个传感单元(301)；第一屏蔽结构(4)设置于所述孔状光阑(2)的背离所述指纹传感器(3)的一侧，且至少部分围绕所述孔(5)。该指纹识别装置(10)能够防止更多的干扰光通过孔(5)进入传感单元(301)，更好地提高指纹识别装置(10)的准确度。

Description

指纹识别装置、显示面板及其制作方法、显示装置
相关申请的交叉引用
本申请基于并且要求于2018年4月24日递交、名称为“指纹识别装置、显示面板及其制作方法、显示装置”的中国专利申请第201810374984.8号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。
技术领域
本公开至少一实施例涉及一种指纹识别装置、显示面板及其制作方法、显示装置。
背景技术
目前，手机等电子产品的指纹识别位置大部分是在非显示区，例如在非显示区单独设置用于指纹识别的键。在显示区域植入指纹感应方案会带来更好的用户体验，所以将指纹识别功能集成到显示区是目前的技术趋势。实现指纹识别的方式目前主要有三种，其分别为光学式指纹识别、电容式指纹识别、射频式指纹识别。
发明内容
本公开至少一实施例提供一种指纹识别装置，该指纹识别装置包括指纹传感器、孔状光阑和第一屏蔽结构。指纹传感器包括多个传感单元；孔状光阑设置于所述指纹传感器的入光侧且包括孔，所述孔允许光经由其入射至所述指纹传感器的至少一个传感单元；第一屏蔽结构设置于所述孔状光阑的背离所述指纹传感器的一侧，且至少部分围绕所述孔。
例如，本公开一实施例提供的指纹识别装置中，所述第一屏蔽结构是透光的且包括暴露所述孔的第一开口；所述第一屏蔽结构的靠近所述孔的第一侧面与所述孔状光阑所在的平面之间的外夹角为钝角。
例如，本公开一实施例提供的指纹识别装置中，所述第一屏蔽结构是不透光的且包括暴露所述孔的第一开口。
例如，本公开一实施例提供的指纹识别装置中，所述第一屏蔽结构是透光的且覆盖所述孔。
例如，本公开一实施例提供的指纹识别装置还包括：第二屏蔽结构，至少覆盖所述第一屏蔽结构的远离所述孔的第二侧面且包括对应于所述孔的第二开口。
例如，本公开一实施例提供的指纹识别装置中，所述第二屏蔽结构是透光的；所述第一屏蔽结构的第二侧面或所述第二侧面的切面与所述孔状光阑所在平面之间的夹角为钝角；所述第二屏蔽结构的折射率大于所述第一屏蔽结构的折射率。
例如，本公开一实施例提供的指纹识别装置中，所述第二屏蔽结构的第二侧面为朝向靠近所述第二屏蔽结构凹陷的曲面，所述曲面的切线与所述孔状光阑所在平面之间的夹角为钝角。
例如，本公开一实施例提供的指纹识别装置中，所述孔状光阑包括不透光材料。
例如，本公开一实施例提供的指纹识别装置中，所述第一屏蔽结构配置为减少或阻挡经由所述孔入射至所述至少一个传感单元的环境光。
本公开至少一实施例还提供一种显示面板，该显示面板包括本公开实施例提供的任意一种指纹识别装置。
例如，本公开一实施例提供的显示面板还包括：显示像素阵列，包括多个呈阵列排布的像素单元；其中，所述第一屏蔽结构和所述孔设置于所述多个像素单元之间的间隙。
例如，本公开一实施例提供的显示面板中，所述第一屏蔽结构还配置为所述显示像素阵列的限定各个所述像素单元的像素界定层。
例如，本公开一实施例提供的显示面板中，所述第一屏蔽结构还配置为所述显示阵列的用于支撑的隔垫物。
例如，本公开一实施例提供的显示面板中，其中所述指纹识别装置还包括第二屏蔽结构，所述第二屏蔽结构配置为所述显示像素阵列的用于支撑的隔垫物。
例如，本公开一实施例提供的显示面板中，所述显示像素阵列包括至少位于所述像素单元中的导电层，所述孔状光阑与所述导电层位于同一层。
例如，本公开一实施例提供的显示面板，还包括衬底基板，所述孔状光阑位于所述衬底基板上，所述指纹传感器位于所述孔状光阑与所述衬底基板之间。
本公开至少一实施例还提供一种显示装置，该显示装置包括本公开实施例提供的任意一种显示面板。
本公开至少一实施例还提供一种显示面板制作方法，该显示面板制作方法包括：提供指纹传感器，所述指纹传感器包括多个传感单元；在所述指纹传感器的入光侧形成所述孔状光阑，所述孔状光阑包括孔；在所述孔状光阑的背离所述指纹传感器的一侧形成第一屏蔽结构，其中，所述第一屏蔽结构围绕至少部分所述孔。
例如，本公开一实施例提供的显示面板制作方法，还包括：在所述第一屏蔽结构和所述孔状光阑上形成第二屏蔽结构，所述第二屏蔽结构至少覆盖所述第一屏蔽结构的远离所述孔的第二侧面且包括对应于所述孔的第二开口。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本公开的一些实施例，而非对本公开的限制。
图1为本公开一实施例提供的一种指纹识别装置的平面示意图；
图2A为沿图1中的A-A’线的剖面示意图；
图2B为本公开一实施例提供的另一种指纹识别装置的局部剖面示意图；
图2C为本公开一实施例提供的又一种指纹识别装置的局部剖面示意图；
图2D为本公开一实施例提供的再一种指纹识别装置的局部剖面示意图；
图2E为本公开一实施例提供的再又一种指纹识别装置的局部剖面示意图；
图2F为本公开一实施例提供的图像传感器的一种驱动原理框图；
图3A为本公开一实施例提供的一种显示面板的平面示意图；
图3B为本公开一实施例提供的一种显示面板中设置有传感单元的区域的平面示意图；
图3C为本公开一实施例提供的另一种显示面板中设置有传感单元的区域的平面示意图；
图3D为本公开一实施例提供又一种显示面板中设置有传感单元的区域的平面示意图；
图4A为沿图3B中的B-B’线的剖面示意图；
图4B为本公开一实施例提供的一种显示面板的局部剖面示意图；
图4C为本公开一实施例提供的另一种显示面板的局部剖面示意图；
图4D为本公开一实施例提供的再一种显示面板的局部剖面示意图；
图4E为本公开一实施例提供的再又一种显示面板的局部剖面示意图；
图5为图4B所示的显示面板进行指纹识别时的光路示意图；
图6为本公开一实施例提供的一种显示装置示意图；
图7A-7I为本公开一实施例提供的一种显示面板制作方法示意图；
图8A-8C为本公开一实施例提供的另一种显示面板制作方法示意图；
图9A-9C为本公开一实施例提供的又一种显示面板制作方法示意图。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。基于所描述的本公开的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本公开保护的范围。
除非另作定义，此处使用的技术术语或者科学术语应当为本发明所属领域内具有一般技能的人士所理解的通常意义。本公开专利申请说明书以及权利要求书中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现在“包括”或者“包含”前面的元件或者物件涵盖出现在“包括”或者“包含”后面列举的元件或者物件及其等同，并不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对 位置改变后，则该相对位置关系也可能相应地改变。
需要指出的是，本公开的附图并不是严格按实际比例绘制，指纹识别装置中孔和传感单元的个数、显示面板中像素单元的个数也不是限定为图中所示的数量，各个结构的具体地尺寸和数量可根据实际需要进行确定。本公开中所描述的附图仅是结构示意图。
本公开至少一实施例提供一种指纹识别装置，该指纹识别装置包括指纹传感器、孔状光阑和第一屏蔽结构。指纹传感器包括多个传感单元；孔状光阑设置于所述指纹传感器的入光侧且包括孔，所述孔允许光经由其入射至所述指纹传感器的传感单元；第一屏蔽结构设置于所述孔状光阑的背离所述指纹传感器的一侧，且至少部分围绕所述孔。
示范性地，图1为本公开一实施例提供的一种指纹识别装置的平面示意图，图2A为沿图1中的A-A’线的剖面示意图。
参考图1和图2A，指纹识别装置10包括指纹传感器3、孔状光阑2和第一屏蔽结构4。指纹传感器3包括至少一个传感单元301。例如，多个传感单元301呈阵列排布。孔状光阑2设置于指纹传感器3的入光侧且包括孔5，孔5允许光经由其入射至指纹传感器3的至少一个传感单元301，从而传感器3可以进行指纹识别。例如，如图1所示，指纹传感器3包括多个呈阵列排布的孔5，每个孔5与每个传感单元301相对应，即每个孔5在衬底基板1上的正投影与每个传感单元301在衬底基板1上的正投影的至少部分重合，以使光能够通过孔5入射至传感单元301，并被传感单元301接收。例如，指纹传感器3为光传感器，能够感应光并将光信号转换成电信号。当手指触摸指纹识别装置的指纹识别区域时，经手指反射的光通过孔5入射至相应的传感单元301，传感单元301对接收到的光信号进行处理，将光信号转换成电信号输出，这些电信号用于对指纹进行识别。同时，环境光(非经手指反射的光)通常也会通过孔5进入传感单元301，从而对用于指纹识别的光信号(经手指反射的光)造成干扰。下文中将这些对指纹识别造成干扰的环境光称为干扰光。
如图1和图2A所示，在本公开实施例提供的指纹识别装置中，第一屏蔽结构4设置于孔状光阑2的背离指纹传感器3的一侧，且第一屏蔽结构4至少部分围绕孔5。如此，第一屏蔽结构4能够阻挡至少部分孔5周围的环 境光入射至孔5，从而减少经由孔5入射至传感单元301的干扰光，提高传感器对指纹识别的准确度，使用户获得更好的指纹识别体验。例如，如图2A所示，孔状光阑2设置在衬底基板1上，指纹传感器3设置于衬底基板1的背离孔状光阑2的一侧，第一屏蔽结构4设置于孔状光阑2的远离衬底基板1的一侧。当然，在本公开的另一个实施例中，指纹传感器3也可以位于衬底基板1与孔状光阑2之间，其他结构均与图2A中所示的相同。
需要说明的是，在图1所示的实施例中，第一屏蔽结构4围绕整个孔5，在本公开的其他实施例中，第一屏蔽结构4也可以部分围绕孔5，即第一屏蔽结构4围绕孔5的外轮廓的一部分，从而至少部分减少经由孔5入射至传感单元301的干扰光。
例如，如图2A所示，第一屏蔽结构4可以是不透光的且包括暴露孔5的第一开口701。利用不透光的第一屏蔽结构4对光的阻挡作用，可以减少经由孔5入射至传感单元301的干扰光，从而提高指纹传感器的指纹识别的准确度。这种情况下，例如，第一屏蔽结构的材料可以是不透光的有机材料，例如黑色树脂，例如加入黑色遮光粒子的树脂材料等。当然，在本公开的其他实施例中，第一屏蔽结构4也可以是透光的，透光的第一屏蔽结构4对干扰光也具有一定程度的阻挡作用，从而减少经由孔5入射至传感单元301的干扰光。例如，第一屏蔽结构的材料可以为无机材料或有机材料，例如氮化硅、氧化硅、氮氧化硅、透光的树脂材料等。需要说明的是，第一屏蔽结构的材料不限于上述列举种类。
例如，如图2A所示，第一屏蔽结构4可以为甜甜圈形状(垂直于衬底基板1的截面轮廓为柱状)，以阻挡孔5周围的干扰光。例如，第一屏蔽结构4的远离孔状光阑2的表面为向远离孔状光阑2的方向凸出的曲面403，该曲面403能够更好地阻挡各个方向的干扰光。当然，在本公开的其他实施例中，第一屏蔽结构4的远离孔状光阑2的表面也为平面，本公开实施例对此不作限定。
图2B为本公开一实施例提供的另一种指纹识别装置的局部剖面示意图。例如，如图2B所示，在本公开的另一个实施例提供的指纹识别装置中，第一屏蔽结构4是透光的且包括暴露孔5的第一开口701，第一屏蔽结构4的靠近孔5的第一侧面401与孔状光阑2所在平面之间的外夹角θ为钝角。如 此，第一屏蔽结构4与空气形成全反射结构以实现减少进入孔内的干扰光，结构简单，易于制作。如图2B所示，当干扰光进入第一屏蔽结构4内，并入射至第一屏蔽结构4的第一侧面401，由于的第一侧面401与孔状光阑2所在平面之间的夹角θ为钝角，这种情况与夹角θ为直角或锐角相比，能够增大由第一屏蔽结构4入射至第一屏蔽结构4的第一侧面401的光的入射角，从而更多的光能够在第一屏蔽结构4的第一侧面401与空气的界面上发生全反射，以减少通过孔5入射至传感单元的干扰光，从而提高指纹识别装置的准确度。
图2C为本公开一实施例提供的又一种指纹识别装置的局部剖面示意图。在图2C所示的实施例中，第一屏蔽结构4是透光的且覆盖孔5，即第一屏蔽结构4的一部分位于孔5中。图2C所示的指纹识别装置的结构简单，易于制作。当进行指纹识别时，经手指反射的光经第一屏蔽结构4透射而进入孔5，再入射至传感单元301，以实现指纹识别。这种情况下，第一屏蔽结构4的围绕孔5的部分可以通过遮挡作用，减少通过孔5入射至传感单元的干扰光，从而提高指纹识别装置的准确度。
图2D为本公开一实施例提供的再一种指纹识别装置的局部剖面示意图。除了第一屏蔽结构4之外，指纹识别装置10还包括第二屏蔽结构6，第二屏蔽结构6至少覆盖第一屏蔽结构4的远离孔5的第二侧面402且包括对应于孔5的第二开口702。例如，第一屏蔽结构4是透光的，当进行指纹识别时，经手指反射的光进入第一屏蔽结构4从而进入孔5，穿过孔5之后再入射至传感单元301，以实现指纹识别。由于第二屏蔽结构6具有对应于孔5的第二开口702，能够避免经手指反射的光在进入第一屏蔽结构4之前还需穿过第二屏蔽结构6，以提高光的利用效率。
在图2D所示的实施例的一个示例中，例如，第二屏蔽结构6是不透光的，在第一屏蔽结构4的围绕孔5的部分对干扰光的阻挡作用的基础上，不透光的第二屏蔽结构6对干扰光具有进一步的阻挡作用，可以减少经由孔5入射至传感单元301的干扰光，从而提高指纹传感器的指纹识别的准确度。例如，第二屏蔽结构6的材料例如可以是不透光的有机材料，例如黑色树脂，例如加入黑色遮光粒子的树脂材料。当然，不透光的第二屏蔽结构的材料不限于是上述种类。
在图2D所示的实施例的另一个示例中，例如，第二屏蔽结构6是透光的，第一屏蔽结构4的第二侧面402与孔状光阑2所在的平面之间的夹角γ为钝角，并且，第二屏蔽结构6的折射率大于第一屏蔽结构4的折射率以构成全反射。如图2D所示，由于第二屏蔽结构6的折射率大于第一屏蔽结构4的折射率，当干扰光通过第二屏蔽结构6入射至第一屏蔽结构4的第二侧面402时，满足全反射条件的光能够在第一屏蔽结构4的第二侧面402上发生全反射，从而减少过孔5入射至传感单元的干扰光。在图2D所示的实施例中，第一屏蔽结构4的第二侧面402与孔状光阑2所在平面之间的夹角γ为钝角，这能够增大由第二屏蔽结构6入射至第一屏蔽结构4的第二侧面402的光的入射角，从而更多的光能够在第一屏蔽结构4的第二侧面402上发生全反射，以减少通过孔5进入传感单元的干扰光，从而提高指纹识别装置的准确度。在这种情况下，例如，第二屏蔽结构6的材料可以为具有较高折射率的二氧化硅、氮化硅或二氧化钛等；第一屏蔽结构4的材料可以为具有较低折射率的氟化镁、多孔二氧化硅或氟氧化硅等。当然，第二屏蔽结构6的材料和第一屏蔽结构4的材料不限于上述列举种类，只要符合上述要求即可。
图2E为本公开一实施例提供的再又一种指纹识别装置的局部剖面示意图。该实施例与图2D实施例的区别在于，第一屏蔽结构4的第二侧面402为朝向靠近第二屏蔽结构6凸出的曲面，该曲面的切线与孔状光阑2所在平面之间的夹角γ为钝角。在图2D所示的实施例所达到的技术效果的基础上，由于第一屏蔽结构4的第二侧面402的各个位置的曲率不同，与第二侧面402为斜面相比有利于使沿各个方向从第二屏蔽结构6入射至第一屏蔽结构4的第二侧面402的干扰光发生全反射，从而能够防止更多的干扰光通过孔5进入传感单元，更好地提高指纹识别装置的准确度。
例如，孔状光阑包括不透光材料，例如孔状光阑的除了孔之外的部分包括不透光材料。例如，可以由不透光材料形成。该不透光材料例如可以为不透光的无机材料，例如金属材料或合金，例如铝、铬、铜、铝合金、镍合金、铜合金等。该不透光材料例如可以为有机材料，例如黑色树脂。例如孔状光阑的材料可以包括感光材料，如此可使孔状光阑易于通过光刻方法制作。例如，该感光材料可以包括光刻胶材料或金属卤化物，金属卤化物例如为卤化银(例如AgCl或AgBr)。例如，可以经过曝光-显影工艺形成孔状光阑，金 属卤化物在曝光后会分解形成金属微粒，该金属微粒由于颗粒小会呈现为黑色，以达到使孔状光阑的除了孔之外的部分的材料是不透光的。需要说明的是，孔状光阑的材料不限于上述列举种类，孔状光阑的除了孔之外的部分的材料只要满足是不透光材料即可，本公开实施例对此不作限定。
例如，传感单元301可以包括光电转换元件(例如，光电二极管、光电晶体管等)和与光电转换元件电连接的开关晶体管等部件，光电转换元件可以将照射到其上的光信号转换为电信号，开关晶体管可以控制是否读取光电转换元件上采集光信号所得到的电信号。例如，该光电二极管为光敏二极管。指纹传感器的传感单元的具体结构可以参考本领域常规技术，这里不再赘述。
本公开实施例提供的指纹识别装置还包括指纹识别检测模块和处理器。图2F为本公开一实施例提供的图像传感器的一种驱动原理框图。例如，如图2F所示，指纹识别驱动模块可以为指纹识别驱动电路，指纹识别驱动电路包括指纹识别行驱动电路和指纹识别列驱动电路。例如，指纹识别驱动电路行驱动电路包括分别连接到呈阵列排布的各个传感单元301的多条传感栅线，指纹识别列驱动电路包括分别连接到呈阵列排布的各个传感单元301的多条传感数据线，以为传感单元301提供扫描信号。例如，指纹识别检测模块可以为指纹识别检测电路，指纹识别检测电路连接到指纹传感器的各个传感单元301以从传感单元301读取电信号。例如，指纹识别检测电路与处理器信号连接，指纹识别检测电路将该电信号发送至处理器，处理器对所接收到的电信号进行处理，例如将该电信号与预先存储的标准指纹所对应的数据信号进行对比而实现指纹识别。例如，处理器可以为数字信号处理器(DSP)、可编程逻辑控制器(PLC)等。该指纹识别驱动电路、指纹识别检测电路可以与传感单元301制备在同一个基底上，或者单独提供并电连接到各传感单元301。当然，指纹传感器的驱动结构、指纹识别检测结构和处理器的种类和连接方式不限于上述示例，本公开实施例对此不作限定，本领域技术人员可参考本领域通常技术。
需要说明的是，本公开附图只示出了与指纹识别装置的屏蔽结构相关的结构，其他结构均可参照本领域常规技术。
本公开至少一实施例还提供一种显示面板，该显示面板包括本公开实施例提供的任意一种指纹识别装置。
示范性地，图3A为本公开一实施例提供的一种显示面板的平面示意图，图3B为本公开一实施例提供的一种显示面板中设置有传感单元的区域的平面示意图，图3C为本公开一实施例提供的另一种显示面板中设置有传感单元的区域的平面示意图，图3D为本公开一实施例提供又一种显示面板中设置有传感单元的区域的平面示意图。
如图3A所示，显示面板11还包括显示像素阵列8。在显示面板11中，指纹传感器可以设置于显示面板中设置有传感单元的区域13以用于接收经手指反射的光。例如，在图3A所示的示例中，设置有传感单元的区域13可以对应于显示面板11的显示像素阵列8的一部分区域。当然，在其他示例中，设置有传感单元的区域13也可以对应于显示面板11的整个显示像素阵列8，以增大指纹传感器的感光面积，实现更好的指纹识别效果。
例如，如图3B-3D所示，显示像素阵列8包括多个呈阵列排布的像素单元801，第一屏蔽结构(图3B-3D中未示出)和孔5设置于像素单元801之间的间隙。孔状光阑2中孔5的设置位置可根据实际应用需求进行设定，本公开的实施例对此不做具体限定。
例如，如图3B所示，每个孔5可以设置于相邻的两个像素单元801之间；又例如，如图3C所示，每个孔5可以设置于相邻的四个像素单元801之间；再例如，如图3D所示，也可以每三个像素单元801对应于一个孔5，由此可以降低传感单元301的设置数目以及制造成本。当然，本公开实施例中，孔状光阑2中孔5的设置位置不限于上述方式。
下面以图3B的剖面图为例进行说明。图4A为沿图3B中的B-B’线的剖面示意图，图4B为本公开一实施例提供的一种显示面板的局部剖面示意图，图4C为本公开一实施例提供的另一种显示面板的局部剖面示意图。
如图3B和图4A所示，例如，显示像素阵列8包括多个呈阵列分布的像素单元801和至少位于像素单元801中的显示元件，显示元件包括导电层，即显示像素阵列8包括至少位于像素单元801中的导电层。本公开一实施例中，显示面板11为有机发光二极管显示面板，本公开以此为例进行说明。例如，显示元件可以为有机发光二极管器件，该有机发光二极管器件可以为顶发射、底发射等结构。例如，该有机发光二极管器件包括第一电极802、有机发光层803和第二电极804。第一电极802和第二电极804即为所述导电 层。例如，第一电极802设置于衬底基板1上。例如，如图4A所示，第一电极802可以设置于孔状光阑2上。有机发光层803设置于第一电极802上。例如，在图4A所示的实施例中，第二电极804为公共电极，其覆盖有机发光层803、第一屏蔽结构4和第二屏蔽结构6。需要说明的是，在本公开的至少一个实施例中，显示面板不限于是有机发光显示面板，相应地，显示元件也不限于是上述的有机发光二极管器件。
例如，显示面板11还包括显示驱动电路。例如，显示驱动电路包括信号线等，例如连接到显示像素阵列的各像素单元的多条显示栅线和显示数据线(图未示出)，以为显示像素阵列的像素单元提供扫描信号和数据信号以进行显示。显示驱动电路和图像传感器的指纹识别行驱动电路、指纹识别列驱动电路均可参考本领域常规设计，例如该行驱动电路和列驱动电路等可以集成在同一个控制电路或芯片之中，本公开实施例对此不作限定。
在图4A所示的实施例中，第一电极802可以为阳极，第二电极804为阴极。例如，阳极为公共电极，显示面板11执行显示功能时，通过显示驱动电路向公共电极输入低电平信号。例如，阳极可以为反射电极或者在与阳极相邻的位置设置反射层(图未示出)，在显示过程中，光从阴极侧出射以实现显示。在本公开的其他是实施例中，第二电极804也可以为阳极，第一电极802为阴极，例如，阳极为公共电极。显示面板11执行显示功能时，通过显示驱动电路向公共电极输入高电平信号。
例如，如图4A所示，显示像素阵列8还包括限定出多个像素单元的像素界定层，以防止相邻像素单元或相邻像素单元之间的光互相串扰。像素界定层包括对应于像素单元801的开口，有机发光层803至少设置于开口中，例如，公共电极覆盖像素界定层。例如，第一屏蔽结构4还可以配置为该像素界定层的一部分，从而无需特别另外设置第一屏蔽结构，达到简化显示面板结构的效果。例如，在这种情况下，第一屏蔽结构4为透光的，即像素界定层是透光的，然而由于第二屏蔽结构6与第一屏蔽结构4构成全反射结构，可以起到改善或防止相邻像素单元或相邻像素单元之间的光互相串扰的问题。同时，与像素界定层是不透光的显示面板相比，有利于提高显示面板的开口率。
例如，如图4A所示，第二屏蔽结构6还可以配置为作为显示像素阵列 的用于支撑的隔垫物，例如隔垫物用于支撑封装层9，例如封装层9为封装盖板等。当然，例如显示面板11也可以为液晶显示面板，第二屏蔽结构6也可以配置为液晶显示面板中的柱状隔垫物，以用于支撑液晶显示面板的衬底基板和对置基板。在本公开的另一个实施例中，当第一屏蔽结构为图2A或图2B所示的结构时，第一屏蔽结构也可以配置为该隔垫物。
例如，在图4A所示的显示面板11中，指纹传感器3位于衬底基板1的远离孔状光阑2的一侧。例如，在图4B所示的实施例中，指纹传感器3也可以位于孔状光阑2与衬底基板1之间，如此，当进行指纹识别时，被手指反射的光在通过孔5之后直接进入指纹传感器3，不需要经过衬底基板1，能够减小这部分光的损失，从而提高指纹识别的准确度。图4B所示的显示面板11的其他结构均与图4A中的相同，请参考之前的描述，在此不再赘述。
例如，在本公开的另一个实施例中，孔状光阑可以与显示像素阵列的导电层位于同一层。示范性地，如图4C所示，孔状光阑2与第一电极802位于同一层，也就是，孔状光阑2与第一电极802均位于指纹传感器3上且均与指纹传感器3相接触，或者说孔状光阑2的顶表面与第一电极802的顶表面处于同一平面内。如此，可以简化显示面板11的结构以及制备工艺，并且有利于显示面板11的薄化。图4C所示的显示面板11的其他结构均与图4A中的相同，请参考之前的描述。
例如，在本公开另一实施例提供的显示面板中，指纹识别装置包括图2A-2C所示的任意一种第一屏蔽结构而不包括第二屏蔽结构。例如，如图4D所示，显示面板11中的指纹识别装置可以包括图2B所示的第一屏蔽结构4，第一屏蔽结构4还配置为隔垫物。又例如，如图4E所示，显示面板11中的指纹识别装置可以包括图2C所示的第一屏蔽结构4，第一屏蔽结构4还配置为像素界定层。图4D和图4E所示的显示面板11的其他结构均与图4A中的相同，请参考之前的描述。
本公开实施例提供的显示面板可以实现在显示像素阵列对应的区域实现指纹识别。图5为图4B所示的显示面板进行指纹识别时的光路示意图，下面以图4B所示的显示面板为例进行说明，其他的实施例提供的显示面板的指纹识别光路与效果与其相似。如图5所示，当显示面板11进行指纹识别时，手指触摸显示面板的显示像素阵列对应的指纹识别区域，来自有机发光层 803发出的光入射至手指的与显示面板11接触的表面，光在手指的表面发生反射后进入手指所在位置对应的孔5，然后再入射至指纹传感器3，被指纹传感器3的传感单元接收，以实现指纹识别功能。一方面，第一屏蔽结构4和第二屏光蔽结构6分别能够阻挡至少部分孔5周围的干扰光(非经手指反射的光，例如环境光、背光、来自于有机发光层的光等)入射至孔5，从而减少经由孔5入射至指纹传感器3的干扰光；另一方面，第一屏蔽结构4和第二屏蔽结构6形成全反射结构，一部分从第二光蔽结构6入射至第一屏蔽结构4的干扰光能够在第一屏蔽结构4的第二侧面402上发生全反射，从而减少通过孔5进入传感单元的干扰光。因此，本公开实施例提供的显示面板中，指纹识别的准确度能够得到提高，这可以使用户获得更好的指纹识别体验。
需要说明的是，在本公开的其他实施例中，入射到手指的光也可以是来自于背光源的光等。
本公开至少一实施例还提供一种显示装置，该显示装置包括本公开实施例提供的任意一种显示面板。
示范性地，图6为本公开一实施例提供的一种显示装置示意图。如图6所示，该显示装置12包括本公开实施例提供的任意一种显示面板11。例如，该显示装置可以为有机发光二极管显示装置、液晶显示装置等。
例如，该显示装置可以实现为如下的产品：手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪、电子广告屏等任何具有显示功能的产品或部件。
图6只是一个包括本公开实施例提供的任意一种显示面板的显示装置的示意图，未示出显示装置的其他结构，本领域技术人员可参考常规技术，本实施例对此不作限定。
本公开实施例提供的显示装置可以实现在显示像素阵列对应的区域实现指纹识别，即在显示区进行指纹识别。本公开实施例提供的显示装置在进行指纹识别时，可以减少或防止干扰光进入指纹传感器，从而指纹识别的准确度能够得到提高，这可以使用户获得更好的指纹识别体验。
本公开至少一实施例还提供一种显示面板制作方法，该显示面板制作方法包括：提供指纹传感器，所述指纹传感器包括多个传感单元；在所述指纹传感器的入光侧形成所述孔状光阑，所述孔状光阑包括孔；在所述孔状光阑 的背离所述指纹传感器的一侧形成第一屏蔽结构，其中，所述第一屏蔽结构围绕至少部分所述孔。
示范性地，图7A-7I为本公开一实施例提供的一种显示面板制作方法示意图。
如图7A所示，提供衬底基板1和指纹传感器3。指纹传感器3包括多个传感单元。例如，多个传感单元呈阵列排布。将指纹传感器3设置于衬底基板1上，或者直接在衬底基板1上通过半导体工艺等方法制作指纹传感器3。另外，在衬底基板1上还可以形成有用于驱动有机发光二极管器件的像素电路(未示出)，其包括多个薄膜晶体管、存储电容等器件，其制备方法可以采用本领域中已知的方法、材料等，这里不再赘述。
如图7B所示，在指纹传感器3上形成用于形成孔的阵列的预制光阑层201。预制光阑层201的材料包括不透光材料，例如其可以为不透光的无机材料，例如金属材料或合金，例如铝、铬、铜、铝合金、镍合金、铜合金等。该不透光材料例如也可以为有机材料，例如黑色树脂。例如预制光阑层201的材料还可以为感光材料，如此可使孔状光阑易于制作。例如，该感光材料可以包括光刻胶材料或金属卤化物，金属卤化物例如为卤化银(例如AgCl或AgBr)。
需要说明的是，预制光阑层的材料不限于上述列举种类，本公开实施例对此不作限定。当预制光阑层201的材料为有机材料时，例如其可以采用涂覆的方法形成；当预制光阑层201的材料为无机材料时，例如其可以采用沉积的方法形成，例如磁控溅射沉积、化学气相沉积等，本领域技术人员可根据预制光阑层201的具体材料选择合适的制作方法。
如图7C所示，采用构图工艺、利用预制光阑层201形成孔阵列，从而在指纹传感器3的入光侧形成包括多个呈阵列排布的孔5的孔状光阑2。例如，可以采用光刻工艺形成孔5。当预制光阑层201的材料为包括光刻胶材料和金属卤化物(例如AgCl或AgBr)的感光材料时，可配合掩模，通过曝光-显影工艺形成孔状光阑2。金属卤化物在曝光后会分解形成金属微粒，该金属微粒由于颗粒小会呈现为黑色，以达到使孔状光阑的除了孔5之外的部分的材料是不透光的。当预制光阑层201的材料为无机材料时，例如可以采用曝光-显影-刻蚀-灰化的工艺形成孔状光阑2。当然，形成孔列层的构图工 艺不限于上述种类。
如图7D所示，在孔状光阑2上形成用于形成第一屏蔽结构的第一光屏蔽层404。第一光屏蔽层404的材料可参考之前第一屏蔽结构的材料的描述。当第一光屏蔽层404的材料为有机材料时，例如其可以采用涂覆的方法形成；当第一光屏蔽层404的材料为无机材料时，例如其可以采用沉积的方法形成，例如磁控溅射沉积、化学气相沉积等，本领域技术人员可根据第一光屏蔽层404的具体材料选择合适的制作方法。
如图7E所示，采用构图工艺、利用第一光屏蔽层404形成第一屏蔽结构4，该构图工艺例如为光刻工艺等。第一屏蔽结构4是透光的，包括围绕孔5的部分，并且第一屏蔽结构4覆盖孔5。第一屏蔽结构4的第二侧面402的切线与孔状光阑2所在的平面之间的夹角γ为钝角。例如，采用湿法蚀刻方法对第一光屏蔽层404进行刻蚀、构图，从而可以实现底切(under-cut)构造。当进行指纹识别时，经手指反射的光经第一屏蔽结构4透射而进入孔5，再入射至传感器的传感单元，以实现指纹识别。这种情况下，第一屏蔽结构4的围绕孔5的部分可以通过遮挡作用，减少通过孔5入射至传感单元的干扰光，从而提高指纹识别装置的准确度。
如图7F所示，在第一屏蔽结构4和孔状光阑2上形成用于形成第二屏蔽结构的第二光屏蔽层601。第二光屏蔽层601的材料可参考之前第二屏蔽结构的材料的描述。当第二光屏蔽层601的材料为有机材料时，例如其可以采用涂覆的方法形成；当第二光屏蔽层601的材料为无机材料时，例如其可以采用沉积的方法形成，例如磁控溅射沉积、化学气相沉积等，本领域技术人员可根据第二光屏蔽层601的具体材料选择合适的制作方法。
如图7G所示，采用构图工艺、利用第二光屏蔽层601形成第一屏蔽结构4，该构图工艺例如为光刻工艺等。第二屏蔽结构6至少覆盖第一屏蔽结构4的远离孔5的第二侧面402且包括对应于孔5的第二开口702。第二屏蔽结构6是透光的，并且，第二屏蔽结构6的折射率大于第一屏蔽结构4的折射率以构成全反射。由于第一屏蔽结构4的第二侧面402的切线与孔状光阑2所在的平面之间的夹角γ为钝角，这能够增大由第二屏蔽结构6入射至第一屏蔽结构4的第二侧面402的光的入射角，因此，更多的光能够在第一屏蔽结构4的第二侧面402上发生全反射，以减少通过孔5进入传感单元的 干扰光，从而提高指纹识别装置的准确度。这种情况下，第一屏蔽结构和第二屏蔽结构的材料可以参考之前的描述，在此不再赘述。
显示面板制作方法还包括形成至少位于显示像素单元801中的显示功能器件，例如有机发光二极管器件。如图7H所示，依次形成第一电极802、有机发光层803和第二电极804，以形成有机发光二极管器件。例如，第二电极804为覆盖有机发光层803、第一屏蔽结构4和第二屏蔽结构6的公共电极。本领域技术人员可采用本领域常规技术来形成第一电极802、有机发光层803和第二电极804。
如图7I所示，采用封装层9对有机发光器件进行封装，得到显示面板11。例如封装层9可以为薄膜封装层或封装盖板。需要说明的是，在封装过程中还可能采用密封填充材料或密封胶，本公开实施例的附图中没有示出，本领域技术人员可采用常规技术。
在采用本公开一实施例提供的制作方法形成的显示面板11中，第一屏蔽结构4、第二屏蔽结构6和孔5设置于像素单元801之间的间隙。一方面，显示面板11的开口率不会受到影响；另一方面，第一屏蔽结构4同时还配置为显示像素阵列的限定出各个像素单元的像素界定层，第二屏蔽结构6还配置为显示像素阵列的用于支撑的隔垫物，例如隔垫物用于支撑封装层9，例如封装层9为封装盖板。这样，无需另外设置像素界定层和隔垫物，以简化显示面板的结构。
图8A-8C为本公开一实施例提供的另一种显示面板制作方法示意图。该方法与图7A-7I所示的方法的区别为：如图8A所示，在完成图7A-7D所示的工艺之后，对第一光屏蔽层404进行构图，形成如图8A所示的第一屏蔽结构4。第一屏蔽结构4围绕整个孔5且包括暴露孔5的第一开口701，在本公开的其他实施例中，第一屏蔽结构4也可以部分围绕孔5，即第一屏蔽结构4围绕孔5的外轮廓的一部分。例如，第一屏蔽结构4可以是不透光的或者透光的，利用第一屏蔽结构4对光的阻挡作用，可以减少经由孔5入射至传感单元301的干扰光，从而提高指纹传感器的指纹识别的准确度。这种情况下，第一屏蔽结构的材料可参考之前的描述。
如图8B所示，依次形成至少位于像素单元801中的第一电极802、有机发光层803和第二电极804。例如，第二电极804为覆盖有机发光层803、第 一屏蔽结构4和第二屏蔽结构6的公共电极。本领域技术人员可采用本领域常规技术来形成第一电极802、有机发光层803和第二电极804。
如图8C所示，采用封装层9对有机发光器件进行封装，得到显示面板11。例如封装层9可以为薄膜封装层或封装盖板。需要说明的是，在封装过程中还可能采用密封填充材料或密封胶，本公开实施例的附图中没有示出，本领域技术人员可采用常规技术。在采用图8A-8C所示的制作方法得到的显示面板11中，第二屏蔽结构6还配置为显示像素阵列的起支撑作用的隔垫物，以简化显示面板的结构。
图9A-9C为本公开一实施例提供的又一种显示面板制作方法示意图。该方法与图7A-7I所示的方法的区别为：如图9A所示，在完成图7A-7D所示的工艺之后，对第一光屏蔽层404进行构图，形成如图9A所示的第一屏蔽结构4。第一屏蔽结构4是透光的，包括围绕孔5的部分，并且第一屏蔽结构4覆盖孔5。当进行指纹识别时，经手指反射的光经第一屏蔽结构4透射而进入孔5，再入射至传感器的传感单元，以实现指纹识别。这种情况下，第一屏蔽结构4的围绕孔5的部分可以通过遮挡作用，减少通过孔5入射至传感单元的干扰光，从而提高指纹识别装置的准确度。
如图9B所示，依次形成至少位于像素单元801中的第一电极802、有机发光层803和第二电极804。例如，第二电极804为覆盖有机发光层803、第一屏蔽结构4和第二屏蔽结构6的公共电极。本领域技术人员可采用本领域常规技术来形成第一电极802、有机发光层803和第二电极804。
如图9C所示，采用封装层9对有机发光器件进行封装，得到显示面板11。例如封装层9可以为薄膜封装层或封装盖板。需要说明的是，在封装过程中还可能采用密封填充材料或密封胶，本公开实施例的附图中没有示出，本领域技术人员可采用常规技术。在采用图9A-9C所示的制作方法得到的显示面板11中，第一屏蔽结构4还配置为显示像素阵列的限定出各个像素单元的像素界定层，以简化显示面板的结构。
以上所述仅是本发明的示范性实施方式，而非用于限制本发明的保护范围，本发明的保护范围由所附的权利要求确定。

Claims (19)

  1. 一种指纹识别装置，包括：
    指纹传感器，包括多个传感单元；
    孔状光阑，设置于所述指纹传感器的入光侧且包括孔，所述孔允许光经由其入射至所述指纹传感器的至少一个传感单元；以及
    第一屏蔽结构，设置于所述孔状光阑的背离所述指纹传感器的一侧，且至少部分围绕所述孔。
  2. 根据权利要求1所述的指纹识别装置，其中，所述第一屏蔽结构是透光的且包括暴露所述孔的第一开口；
    所述第一屏蔽结构的靠近所述孔的第一侧面与所述孔状光阑所在的平面之间的外夹角为钝角。
  3. 根据权利要求1所述的指纹识别装置，其中，所述第一屏蔽结构是不透光的且包括暴露所述孔的第一开口。
  4. 根据权利要求1所述的指纹识别装置，其中，所述第一屏蔽结构是透光的且覆盖所述孔。
  5. 根据权利要求4所述的指纹识别装置，还包括：
    第二屏蔽结构，至少覆盖所述第一屏蔽结构的远离所述孔的第二侧面且包括对应于所述孔的第二开口。
  6. 根据权利要求5所述的指纹识别装置，其中，所述第二屏蔽结构是透光的；
    所述第一屏蔽结构的第二侧面或所述第二侧面的切面与所述孔状光阑所在平面之间的夹角为钝角；
    所述第二屏蔽结构的折射率大于所述第一屏蔽结构的折射率。
  7. 根据权利要求6所述的指纹识别装置，其中，所述第一屏蔽结构的第二侧面为朝向靠近所述第二屏蔽结构凸出的曲面，所述曲面的切线与所述孔状光阑所在平面之间的夹角为钝角。
  8. 根据权利要求1-7任一所述的指纹识别装置，其中，所述孔状光阑包括不透光材料。
  9. 根据权利要求1-8任一所述的指纹识别装置，其中，所述第一屏蔽结 构配置为减少或阻挡经由所述孔入射至所述至少一个传感单元的环境光。
  10. 一种显示面板，包括权利要求1-9任一所述的指纹识别装置。
  11. 根据权利要求10所述的显示面板，还包括：
    显示像素阵列，包括多个呈阵列排布的像素单元；
    其中，所述第一屏蔽结构和所述孔设置于所述多个像素单元之间的间隙。
  12. 根据权利要求11所述的显示面板，其中，所述第一屏蔽结构还配置为所述显示像素阵列的限定各个所述像素单元的像素界定层。
  13. 根据权利要求11所述的显示面板，其中，所述第一屏蔽结构还配置为所述显示像素阵列的用于支撑的隔垫物。
  14. 根据权利要求13所述的显示面板，其中，所述指纹识别装置还包括第二屏蔽结构，所述第二屏蔽结构配置为所述显示像素阵列的用于支撑的隔垫物。
  15. 根据权利要求11所述的显示面板，其中，所述显示像素阵列包括至少位于所述像素单元中的导电层，所述孔状光阑与所述导电层位于同一层。
  16. 根据权利要求10-15任一所述的显示面板，还包括衬底基板，所述孔状光阑位于所述衬底基板上，所述指纹传感器位于所述孔状光阑与所述衬底基板之间。
  17. 一种显示装置，包括权利要求10-16任一所述的显示面板。
  18. 一种显示面板制作方法，包括：
    提供指纹传感器，所述指纹传感器包括多个传感单元；
    在所述指纹传感器的入光侧形成所述孔状光阑，所述孔状光阑包括孔；
    在所述孔状光阑的背离所述指纹传感器的一侧形成第一屏蔽结构，其中，所述第一屏蔽结构围绕至少部分所述孔。
  19. 根据权利要求18所述的显示面板制作方法，还包括：
    在所述第一屏蔽结构和所述孔状光阑上形成第二屏蔽结构，所述第二屏蔽结构至少覆盖所述第一屏蔽结构的远离所述孔的第二侧面且包括对应于所述孔的第二开口。
PCT/CN2018/119609 2018-04-24 2018-12-06 指纹识别装置、显示面板及其制作方法、显示装置 WO2019205646A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US16/472,438 US11354927B2 (en) 2018-04-24 2018-12-06 Fingerprint identification device, display panel and fabrication method thereof, and display device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810374984.8 2018-04-24
CN201810374984.8A CN108596096B (zh) 2018-04-24 2018-04-24 指纹识别装置、显示面板及其制作方法、显示装置

Publications (1)

Publication Number Publication Date
WO2019205646A1 true WO2019205646A1 (zh) 2019-10-31

Family

ID=63614607

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/119609 WO2019205646A1 (zh) 2018-04-24 2018-12-06 指纹识别装置、显示面板及其制作方法、显示装置

Country Status (3)

Country Link
US (1) US11354927B2 (zh)
CN (1) CN108596096B (zh)
WO (1) WO2019205646A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3823046A1 (en) * 2019-11-15 2021-05-19 Lite-On Opto Technology (Changzhou) Co., Ltd. Light sensing module and electronic device using the same
US11644360B2 (en) 2019-11-15 2023-05-09 Lite-On Opto Technology (Changzhou) Co., Ltd. Light sensing module and electronic device using the same

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108596096B (zh) * 2018-04-24 2021-01-22 京东方科技集团股份有限公司 指纹识别装置、显示面板及其制作方法、显示装置
CN109449181B (zh) * 2018-10-29 2021-01-15 京东方科技集团股份有限公司 显示基板及其制作方法、显示装置
CN109670448B (zh) * 2018-12-20 2021-02-23 武汉华星光电半导体显示技术有限公司 显示屏的指纹识别结构
CN109891429B (zh) * 2018-12-26 2023-05-26 深圳市汇顶科技股份有限公司 指纹识别装置和指纹识别方法
CN110147009A (zh) * 2019-04-30 2019-08-20 武汉华星光电技术有限公司 显示面板及显示装置
CN111430300B (zh) * 2020-03-31 2023-09-05 京东方科技集团股份有限公司 Oled阵列基板及其制备方法、显示面板及显示装置
CN114323089A (zh) * 2020-10-12 2022-04-12 群创光电股份有限公司 光检测元件
CN112748598A (zh) * 2021-01-08 2021-05-04 武汉华星光电技术有限公司 一种阵列基板、显示面板以及显示装置
US11519801B1 (en) * 2021-06-04 2022-12-06 Synaptics Incorporated Sensor device for transcapacitive sensing with shielding
US11816919B2 (en) * 2021-06-04 2023-11-14 Synaptics Incorporated Sensor device for transcapacitive sensing with shielding

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106773219A (zh) * 2017-02-07 2017-05-31 京东方科技集团股份有限公司 一种显示装置
CN107451576A (zh) * 2017-08-09 2017-12-08 上海天马微电子有限公司 一种阵列基板及其制备方法、显示面板和显示装置
CN107689384A (zh) * 2016-08-05 2018-02-13 上海箩箕技术有限公司 显示模组
US20180101039A1 (en) * 2016-10-07 2018-04-12 Keycorp Technology Corp. Liquid crystal module with fingerprint identification function
CN108596096A (zh) * 2018-04-24 2018-09-28 京东方科技集团股份有限公司 指纹识别装置、显示面板及其制作方法、显示装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10176355B2 (en) * 2015-12-03 2019-01-08 Synaptics Incorporated Optical sensor for integration in a display
CN105678255B (zh) * 2016-01-04 2019-01-08 京东方科技集团股份有限公司 一种光学式指纹识别显示屏及显示装置
CN106339682B (zh) * 2016-08-26 2019-09-06 京东方科技集团股份有限公司 指纹识别的显示面板及指纹识别的显示装置
CN106324906A (zh) 2016-09-08 2017-01-11 京东方科技集团股份有限公司 准直背光源及其制备方法、透明显示装置
KR102502201B1 (ko) * 2017-11-17 2023-02-22 삼성디스플레이 주식회사 지문 센서 및 이를 포함한 표시 장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107689384A (zh) * 2016-08-05 2018-02-13 上海箩箕技术有限公司 显示模组
US20180101039A1 (en) * 2016-10-07 2018-04-12 Keycorp Technology Corp. Liquid crystal module with fingerprint identification function
CN106773219A (zh) * 2017-02-07 2017-05-31 京东方科技集团股份有限公司 一种显示装置
CN107451576A (zh) * 2017-08-09 2017-12-08 上海天马微电子有限公司 一种阵列基板及其制备方法、显示面板和显示装置
CN108596096A (zh) * 2018-04-24 2018-09-28 京东方科技集团股份有限公司 指纹识别装置、显示面板及其制作方法、显示装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3823046A1 (en) * 2019-11-15 2021-05-19 Lite-On Opto Technology (Changzhou) Co., Ltd. Light sensing module and electronic device using the same
US11644360B2 (en) 2019-11-15 2023-05-09 Lite-On Opto Technology (Changzhou) Co., Ltd. Light sensing module and electronic device using the same

Also Published As

Publication number Publication date
US20210406501A1 (en) 2021-12-30
CN108596096B (zh) 2021-01-22
CN108596096A (zh) 2018-09-28
US11354927B2 (en) 2022-06-07

Similar Documents

Publication Publication Date Title
WO2019205646A1 (zh) 指纹识别装置、显示面板及其制作方法、显示装置
US11342390B2 (en) Display panel, display device and a method for manufacturing a display panel
WO2018145461A1 (zh) 显示装置
CN107579166B (zh) 显示面板、显示装置及显示面板制作方法
WO2018028303A1 (zh) 一种指纹识别模组、其制作方法及显示装置
WO2019137002A1 (zh) 显示面板和显示装置
CN111326636A (zh) 一种阵列基板、其制作方法、显示面板及显示装置
US20200356744A1 (en) Sensor, manufacturing method thereof, panel and recognition device
WO2021017194A1 (zh) 显示面板及显示装置
TWI690759B (zh) 感測顯示裝置
CN109190563B (zh) 显示面板及其制备方法、显示装置
WO2021249178A1 (zh) 显示面板和显示装置
WO2021022495A1 (zh) 显示基板及其制作方法、显示装置
WO2023015952A1 (zh) 显示面板及显示装置
CN113224118A (zh) 纹路识别显示面板和显示装置
WO2019205961A1 (zh) 指纹识别器件、其制作方法、以及显示面板
TWI759153B (zh) 指紋感測模組
CN113486801B (zh) 感测装置
CN115835733A (zh) 一种显示面板及显示装置
WO2022174448A1 (zh) 显示基板及显示装置
US11067865B1 (en) Display apparatus
CN114299823B (zh) 显示面板及其制备方法、光检测方法、显示装置
CN114551554A (zh) 显示基板及显示装置
CN113642396A (zh) 感测装置
CN112420618A (zh) 显示面板及显示面板的制备方法

Legal Events

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

Ref document number: 18916334

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18916334

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 18916334

Country of ref document: EP

Kind code of ref document: A1

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS (EPO FORM 1205A DATED 10.05.2021)