WO2023010612A1 - 显示面板及电子装置 - Google Patents

显示面板及电子装置 Download PDF

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Publication number
WO2023010612A1
WO2023010612A1 PCT/CN2021/112555 CN2021112555W WO2023010612A1 WO 2023010612 A1 WO2023010612 A1 WO 2023010612A1 CN 2021112555 W CN2021112555 W CN 2021112555W WO 2023010612 A1 WO2023010612 A1 WO 2023010612A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
protective layer
display panel
refractive index
light source
Prior art date
Application number
PCT/CN2021/112555
Other languages
English (en)
French (fr)
Inventor
刘广坤
Original Assignee
武汉华星光电技术有限公司
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 武汉华星光电技术有限公司 filed Critical 武汉华星光电技术有限公司
Priority to US17/605,532 priority Critical patent/US20240019645A1/en
Publication of WO2023010612A1 publication Critical patent/WO2023010612A1/zh

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • 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
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/009—Positioning aspects of the light source in the package

Definitions

  • the present application relates to the field of display technology, in particular to a display panel and an electronic device.
  • the mainstream fingerprint identification technologies are capacitive and optical, and capacitive is basically used in liquid crystal display devices (liquid crystal display devices). display, LCD), usually located on the back, lower frame or side of the electronic device. This method not only damages the aesthetics of the electronic device, but also has nowhere to place the capacitive fingerprint recognition module as the screen-to-body ratio continues to increase.
  • the optical type is basically applied to organic light-emitting diodes (organic light emitting diode, OLED) display device, the fingerprint identification area can be located in the display area, so that the electronic device can have good aesthetics.
  • OLED organic light emitting diode
  • the existing display panels and electronic devices have the problem that fingerprint recognition can only be fixed within a specific small area. Therefore, it is necessary to provide a display panel and an electronic device to improve this defect.
  • Embodiments of the present application provide a display panel and an electronic device, which are used to solve the problem that fingerprint recognition in the existing display panel and electronic device can only be fixed within a specific small area.
  • An embodiment of the present application provides a display panel, including:
  • the protective layer is arranged on the light-emitting side of the main body of the display panel;
  • a light source module the light emitting surface of the light source module faces the light incident surface of the protective layer;
  • an optical sensor disposed on a side of the display panel body away from the protective layer
  • the outgoing light emitted by the light source module enters the protective layer along a first direction, and the angle between the first direction and the thickness direction of the protective layer is larger than that of the outgoing light at a cross-sectional viewing angle.
  • the critical angle of the light-emitting surface of the protective layer is larger than that of the outgoing light at a cross-sectional viewing angle.
  • the light source module includes:
  • the light emitting surface of the light guiding element faces the light incident surface of the protective layer
  • the light source is arranged on the side of the light incident surface of the light guide.
  • a reflective layer is disposed on the surface of the light guide, and the reflective layer exposes a light incident surface and a light exit surface of the light guide.
  • the light guide has a reflective surface opposite to the light-emitting surface, and an array structure is provided on the reflective surface, and the array structure has an uneven surface.
  • the array structure includes a plurality of protrusions protruding from the reflective surface in a direction opposite to the first direction, and the protrusions are any of pyramids, hemispheres or semi-ellipsoids. A sort of;
  • the array structure includes a plurality of recesses recessed by the reflective surface along the first direction, and the cross-section of the recesses is any one of triangular, semicircular or semielliptical.
  • the display panel further includes a first adhesive layer, and the first adhesive layer is attached to the light emitting surface of the light source module and the light incident surface of the protective layer. between;
  • the refractive index of the first adhesive layer is greater than the refractive index of the protective layer.
  • the refractive index of the first adhesive layer is greater than or equal to 1.5 and less than or equal to 1.8.
  • the display panel further includes a second adhesive layer, and the second adhesive layer is bonded to the light incident surface of the protective layer;
  • the refractive index of the second adhesive layer is smaller than that of the protective layer, and the refractive index of the finger is smaller than that of the protective layer.
  • the protective layer has a refractive index of n 1
  • the second adhesive layer has a refractive index of n 2
  • the finger has a refractive index of n 3
  • the emitted light enters the
  • the incident angle of the protective layer is ⁇ ;
  • the refractive index of the second adhesive layer is greater than or equal to 1.1 and less than or equal to 1.3, and the refractive index of the protective layer is greater than or equal to 1.4 and less than or equal to 1.6.
  • the display panel body includes a display area and a frame area surrounding the display area, and the light source module is disposed in the frame area.
  • the embodiment of the present application also provides an electronic device, including a display panel, and the display panel includes:
  • the protective layer is arranged on the light-emitting side of the main body of the display panel;
  • a light source module the light emitting surface of the light source module faces the light incident surface of the protective layer;
  • an optical sensor disposed on a side of the display panel body away from the protective layer
  • the outgoing light emitted by the light source module enters the protective layer along a first direction, and the angle between the first direction and the thickness direction of the protective layer is larger than that of the outgoing light at a cross-sectional viewing angle.
  • the critical angle of the light-emitting surface of the protective layer is larger than that of the outgoing light at a cross-sectional viewing angle.
  • the light source module includes:
  • the light emitting surface of the light guiding element faces the light incident surface of the protective layer
  • the light source is arranged on the side of the light incident surface of the light guide.
  • a reflective layer is disposed on the surface of the light guide, and the reflective layer exposes a light incident surface and a light exit surface of the light guide.
  • the light guide has a reflective surface opposite to the light-emitting surface, and an array structure is provided on the reflective surface, and the array structure has an uneven surface.
  • the array structure includes a plurality of protrusions protruding from the reflective surface in a direction opposite to the first direction, and the protrusions are any of pyramids, hemispheres or semi-ellipsoids. A sort of;
  • the array structure includes a plurality of recesses recessed by the reflective surface along the first direction, and the cross-section of the recesses is any one of triangular, semicircular or semielliptical.
  • the display panel further includes a first adhesive layer, and the first adhesive layer is attached to the light emitting surface of the light source module and the light incident surface of the protective layer. between;
  • the refractive index of the first adhesive layer is greater than the refractive index of the protective layer.
  • the refractive index of the first adhesive layer is greater than or equal to 1.5 and less than or equal to 1.8.
  • the display panel further includes a second adhesive layer, and the second adhesive layer is bonded to the light incident surface of the protective layer;
  • the refractive index of the second adhesive layer is smaller than that of the protective layer, and the refractive index of the finger is smaller than that of the protective layer.
  • the protective layer has a refractive index of n 1
  • the second adhesive layer has a refractive index of n 2
  • the finger has a refractive index of n 3
  • the emitted light enters the
  • the incident angle of the protective layer is ⁇ ;
  • the embodiments of the present application provide a display panel and an electronic device
  • the electronic device includes the display panel
  • the display panel includes a display panel main body, a protective layer, a light source module and an optical sensor
  • the protective layer is arranged on the light-emitting side of the display panel body, the light-emitting surface of the light source module faces the light-incident surface of the protective layer
  • the optical sensor is arranged on the side of the display panel body away from the protective layer.
  • the outgoing light emitted by the light source module enters the protective layer along a first direction, and the included angle between the first direction and the thickness direction of the protective layer is larger than that of the outgoing light on the protective layer.
  • the critical angle of the light-emitting surface makes the light emitted by the optical module realize total reflection in the protective layer.
  • the finger used for fingerprint detection touches the area of the protective layer corresponding to the display area of the display panel, the light irradiated to the finger can be Reflected to the optical sensor, this can increase the range of fingerprint recognition under the display panel and electronic device screen, thereby increasing the convenience of fingerprint recognition.
  • FIG. 1 is a schematic plan view of a display panel provided by an embodiment of the present application.
  • Fig. 2 is a schematic cross-sectional view along the A-A direction of the first display panel provided by the embodiment of the present application;
  • FIG. 3 is a schematic structural diagram of a light source module provided in an embodiment of the present application.
  • Fig. 4 is a schematic cross-sectional view along the B-B direction of the first light guide provided by the embodiment of the present application;
  • FIG. 5 is a schematic cross-sectional view of the second light guide provided in the embodiment of the present application along the B-B direction;
  • Fig. 6 is a schematic cross-sectional view along the B-B direction of the third light guide provided by the embodiment of the present application.
  • Fig. 7 is a schematic cross-sectional view along the B-B direction of the fourth light guide provided by the embodiment of the present application.
  • FIG. 8 is a schematic cross-sectional view along the A-A direction of the second display panel provided by the embodiment of the present application.
  • Embodiments of the present application provide a display panel and an electronic device, and the electronic device includes the display panel 100 .
  • the electronic device may also include a casing, the display panel may be mounted on the casing, and an accommodating space may be provided in the casing, and the accommodating space may be used for placing a main board, a printed circuit board, a battery, etc. Electronic components required for driving the flexible display panel.
  • the electronic device may be a vehicle-mounted display terminal, such as a vehicle-mounted display, a driving recorder, etc.
  • the electronic device may also be a mobile terminal, such as a smart phone, a tablet computer, a notebook computer, etc., or a wearable Type terminals, such as smart watches, smart bracelets, smart glasses, augmented reality equipment, etc.
  • the electronic device can also be a fixed terminal, such as a desktop computer, TV, etc., or a vehicle display terminal, such as a vehicle display or a driving recorder wait.
  • FIG. 1 is a schematic plan view of the display panel provided by the embodiment of the present application
  • FIG. 2 is a schematic cross-sectional view of the first display panel provided by the embodiment of the present application along the A-A direction.
  • the display panel 100 It includes a display panel main body 10 , a protective layer 20 , a light source module 30 and an optical sensor 40 .
  • the protective layer 20 is arranged on the light emitting side of the display panel main body 10 to protect the display panel main body 10 .
  • the light emitting surface of the light source module 30 faces the light incident surface 21 of the protective layer 20 , and the light source module 30 is used to provide a light source for the optical sensor 40 .
  • the optical sensor 40 is disposed on a side of the display panel body 10 away from the protection layer 20 .
  • the display panel body 10 is a liquid crystal display panel, and the liquid crystal display panel may include a backlight module, an array substrate, a liquid crystal layer and a color filter substrate.
  • the light emitted by the light source module 30 irradiates the protective layer 20 , and after being reflected by the finger 200 , it can pass through the display panel main body 10 and be received by the optical sensor 40 .
  • the type of the display panel body 10 is not limited to the above-mentioned liquid crystal display panel, and may also be other types of display panels such as organic light emitting diode display panels or micro light emitting diode display panels.
  • the display panel 100 also includes a plastic frame 11 , a slot is provided on a vertical side wall of the plastic frame 11 , and the light source module 30 can be fixedly installed in the slot.
  • the protective layer 20 is a cover plate, and the cover plate is made of a light-transmitting material.
  • the protective layer 20 is not limited to the above-mentioned cover plate, but can also be a light-transmitting hard coating.
  • the outgoing light L1 emitted by the light source module 30 enters the protective layer 20 along the first direction a1, and the angle ⁇ between the first direction a1 and the thickness direction y of the protective layer 20 is greater than The critical angle of the outgoing light L1 on the light emitting surface of the protective layer 20 .
  • the outgoing light L1 emitted by the light source module 30 can be totally reflected in the protective layer 20 , so that any area of the protective layer 20 can be distributed with the light emitted by the light source module 30 .
  • the display panel 100 includes a display area 110 and a frame area 120 surrounding the display area 110.
  • the finger 200 contacts the area of the protective layer 20 corresponding to the display area 110, the finger 200 can break the display area 110.
  • the light emitted by the light source module 30 is totally reflected in the protective layer 20, and the light irradiated to the finger 200 is emitted from the light incident surface 21 of the protective layer 20, and is received by the optical sensor 40 after passing through the display panel main body 10, so that the Optical detection of the finger 200 is achieved.
  • the fingerprint of a finger 200 has ridges 210 distributed at intervals and valleys 220 between adjacent ridges 210 .
  • the total reflection is maintained, so that the area corresponding to the valley 220 will have less light reflected to the optical sensor 40, thereby forming biometric information with bright ridges and dark valleys, that is, fingerprint information.
  • the light carrying fingerprint information enters the display panel body 10 below the protective layer 20 , and then reaches the optical sensor 40 through a collimated optical path, thereby increasing the range of the display panel 100 and the under-screen fingerprint recognition of the electronic device.
  • the display panel 100 may only include one light source module 30 , and the light source module 30 may be disposed in the frame area 120 at the lower edge of the display area 110 .
  • the light source module 30 can also be disposed in the frame area 120 at the upper edge, left edge or right edge of the display area 110 .
  • the display panel 100 may also include a plurality of light source modules 30 , and the plurality of light source modules 30 may be distributed in the frame area 120 at the periphery of the display area 110 .
  • FIG. 3 is a schematic structural diagram of a light source module provided by an embodiment of the present application.
  • the light source module 30 includes a light guide 31 and a light source 32 .
  • the light source 32 is arranged at the entrance of the light guide 31 .
  • the light exit surface of the light guide member 31 faces the light incident surface 21 of the protective layer 20 .
  • the light source 32 is an infrared light source, which is used to provide infrared light for fingerprint identification.
  • the infrared light can not be noticed by human eyes, and can penetrate the display panel main body 10, so that the display effect of the display panel 100 can not be affected while realizing the fingerprint recognition function under the screen.
  • the type of light source 32 is not limited to infrared light sources, and may also be ultraviolet light sources or other invisible light sources.
  • the light guide 31 is a rod-shaped structure (that is, a light guide rod), including a light exit surface 310, a first light incident surface 311 and a second light incident surface 312 located at opposite ends of the light exit surface 310, and a The first connection surface 313 and the second connection surface 314 at opposite ends of the surface 310 and connected to the first light incident surface 311 and the second light incident surface 312 , and the reflective surface 315 opposite to the light exit surface 310 .
  • a rod-shaped structure that is, a light guide rod
  • first light incident surface 311 and the second light incident surface 312 are parallel to the first direction a1 and perpendicular to the second direction a2, and the first connection surface 313 and the second connection surface 314 are parallel to the first direction a1 and the second direction a2.
  • the plane defined by the direction a2 is parallel, and the light emitting surface 310 is parallel to the second direction a2 and perpendicular to the first direction a1.
  • the angle between the first direction a1 and the thickness direction y of the protective layer 20 is also ⁇
  • the thickness direction y of the protective layer 20 is a vertical direction
  • the thickness direction y of the protective layer 20 is perpendicular to the horizontal direction. direction x.
  • the reflective surface 315 is vertically connected to the first connecting surface 313 and the second connecting surface 314. After the light emitted by the light source 32 is reflected by the reflecting surface 315, it can emerge from the light source module 30 along the first direction a1 to form the outgoing light L1.
  • the incident angle when the outgoing light L1 enters the protective layer 20 is ⁇
  • the incident angle ⁇ is larger than 42°.
  • the light source module 30 has two light sources 32 , and the two light sources 32 are respectively disposed opposite to the first light incident surface 311 and the second light incident surface 312 .
  • the two light sources 32 respectively inject infrared light into the light guide 31 through the first light incident surface 311 and the second light incident surface 312, so as to increase the amount of infrared light in the light guide 31, so that more light can be absorbed Reflected to the optical sensor 40, thereby improving the accuracy of fingerprint identification of the electronic device.
  • the display panel 100 may further include a first adhesive layer 50 , and the first adhesive layer 50 is bonded to the light output surface of the light source module 30 and the input surface of the protective layer 20 . Between the optical surfaces 21 , the refractive index of the first adhesive layer 50 is greater than the refractive index of the protective layer 20 .
  • the light exit surface 310 of the light guide member 31 is attached to the light incident surface 21 of the protective layer 20 through the first adhesive layer 50 .
  • the first adhesive layer 50 With a higher refractive index than the protective layer 20 between the light guide 31 and the protective layer 20, the degree of refraction of the outgoing light L1 entering the protective layer 20 from the light guide 31 can be reduced, thereby More light from the light source 32 can enter the protective layer 20 for total reflection, thereby improving the light utilization rate of the light source module 30 .
  • the refractive index of the first adhesive layer 50 is 1.6.
  • the refractive index of the first adhesive layer 50 is not limited to the above-mentioned 1.6, but can also be 1.5, 1.7 or 1.8, etc., and it only needs to be greater than or equal to 1.5 and less than or equal to 1.8.
  • a reflective layer 316 is disposed on the surface of the light guide 31 , and the reflective layer 316 exposes the light incident surface and the light exit surface of the light guide 31 .
  • a reflective layer 316 is provided on the first light incident surface 311 , the second light incident surface 312 , the first connection surface 313 , the second connection surface 314 and the reflection surface 315 .
  • the reflective layer 316 can prevent the light emitted by the light source 32 from exiting from other surfaces of the light guide member 31 except the light output surface 310 , thereby improving the light utilization efficiency of the light source module 30 .
  • the reflective layer 316 can be directly formed on the above-mentioned surfaces by evaporation, coating or other processes, and the material of the reflective layer 316 can include but not limited to at least one of metal materials such as Ag or Al.
  • the reflective surface 315 is provided with an array structure 33, and the array structure 33 is used to destroy the total reflection of the light emitted by the light source 32 in the light guide 31 and make the light travel along the first Direction a1 exits.
  • FIG. 4 is a schematic cross-sectional view of the first light guide provided in the embodiment of the present application along the B-B direction, and the array structure 33 includes a direction opposite to the first direction a1.
  • a plurality of protrusions 331 protrude from the reflective surface 315 , and the protrusions 331 are used to disrupt the total reflection of the light emitted by the light source 32 in the light guide 31 .
  • the convex portion 331 can reflect the light along the first direction a1 and emit it from the light emitting surface 310 of the light guide 31 .
  • the protruding portion 331 and the light guide member 31 can be integrally formed by injection molding process.
  • the convex portion 331 is a semi-ellipsoid, and its cross-section in the B-B direction is semi-elliptical.
  • FIG. 5 which is a schematic cross-sectional view of the second light guide provided in the embodiment of the present application along the B-B direction in FIG. 5, the shape of the convex part 331 is not limited to the above-mentioned semi-ellipsoid, but Can be pyramid or hemisphere.
  • the convex portion 331 is a pyramid
  • the convex portion 331 may specifically be a triangular pyramid, a quadrangular pyramid, etc., and the cross section of the convex portion 331 along the B-B direction is triangular.
  • the width d of the protrusion 331 in the second direction a2 is 40 microns.
  • the width d of the convex portion 331 in the second direction a2 is not limited to the above-mentioned 40 microns, but can also be 30 microns, 35 microns, 45 microns or 50 microns, etc., and it only needs to be greater than or equal to 30 microns and Less than or equal to 50 microns.
  • the single convex portion 331 can be kept within a reasonable size range, and the excessive width of the convex portion 331 in the second direction a2 will prevent the effect of the convex portion 331 from disrupting the total reflection of light in the light guide 31 from being reduced. It can avoid that the density of the protrusions 331 in the array structure 33 is reduced due to the excessive width of the protrusions 331 in the second direction a2, thereby affecting the light reflection of the reflective surface 315, thereby ensuring the light utilization rate of the light source module 30.
  • the height h of the protrusion 331 in the first direction a1 is 3 microns.
  • the height h of the convex portion 331 in the first direction a1 is not limited to the above-mentioned 3 microns, but may also be 2 microns, 2.5 microns, 3.5 microns or 4 microns, etc., and it only needs to be greater than or equal to 2 microns. Micron and less than or equal to 4 microns.
  • the height h of the convex portion 331 is too small to reduce the reflection effect of the convex portion 331 on the light, and at the same time, it can also avoid that the height h of the convex portion 331 is too large, so that the infrared light cannot be transmitted to the light guide 31.
  • the distance from the light source 32 is relatively small. The far area can improve the light utilization rate of the light source module 30 .
  • the distance b between adjacent protrusions 331 is 0.5 mm.
  • the distance b between adjacent convex parts 331 is not limited to the above-mentioned 0.5 mm, but can also be 0.3 mm, 0.4 mm or 0.6 mm, etc., and only needs to be greater than or equal to 0.3 mm and less than or equal to 0.6 mm That is, in this way, it can be avoided that the size between adjacent convex portions 331 is too large so that the density of the convex portions 331 in the array structure 33 is reduced, resulting in a reduction in the reflection effect of the array structure 33 on light, thereby ensuring the light utilization of the light source module 30. Rate.
  • Figure 6 is a schematic cross-sectional view along the B-B direction of the third type of light guide provided by the embodiment of the present application
  • Figure 7 is a schematic cross-sectional view of the fourth type of light guide provided by the embodiment of the present application
  • a schematic cross-sectional view of the light guide along the direction B-B, the array structure 33 includes a plurality of recesses 332 recessed by the reflective surface 315 along the first direction a1.
  • the function of the protrusion 331 is the same as that of the protrusion 331 in the light guide shown in FIG. 4 and FIG. 5 , and it is also used to disturb the total reflection of the light emitted by the light source 32 in the light guide 31 .
  • the cross section of the recess 332 on the plane where the first direction a1 and the second direction a2 are located is semi-elliptical, wherein the plane where the first direction a1 and the second direction a2 are located is along the In the cross-section in the B-B direction, the second direction a2 is perpendicular to the first direction a1.
  • the cross-sectional shape of the concave portion 332 along the B-B direction is not limited to the above-mentioned semi-ellipse, but can also be a semi-circle or a triangle as shown in FIG. 7 .
  • the depth h of the concave portion 332 in the first direction a1 can be 2 microns, 2.5 microns, 3 microns, 3.5 microns or 4 microns, etc., and only needs to be greater than or equal to 2 microns and less than or equal to 4 microns.
  • the distance b between adjacent recesses 332 can be 0.3 mm, 0.4 mm, 0.5 mm or 0.6 mm, etc., and it only needs to be greater than or equal to 0.3 mm and less than or equal to 0.6 mm.
  • the display panel 100 further includes a second adhesive layer 60, the second adhesive layer 60 is attached to the light incident surface 21 of the protective layer 20, and the protective layer 20 The second adhesive layer 60 is bonded to the display panel main body 10 .
  • the refractive index of the second adhesive layer 60 is smaller than that of the protective layer 20 , so as to ensure that the outgoing light L1 can be totally reflected in the protective layer 20 .
  • the refractive index of the finger 200 is smaller than that of the protective layer 20 , which can ensure that the finger 200 can destroy the total reflection of infrared rays in the protective layer 20 .
  • the protective layer 20 has a refractive index of n 1
  • the second adhesive layer 60 has a refractive index of n 2
  • the finger 200 is a user's finger
  • its refractive index is n 3
  • the outgoing light L1 is emitted
  • the incident angle into the protective layer 20 is ⁇ , wherein the above-mentioned refractive indices satisfy: arcsin(n 2 /n 1 ) ⁇ arcsin(n 3 /n 1 ). In this way, it can not only ensure the total reflection of the infrared light in the protective layer 20, but also ensure that the ridges 210 of the finger can destroy the total reflection of the infrared light in the protective layer 20, so as to realize the extraction of fingerprint feature information.
  • the refractive index n 2 of the second adhesive layer 60 is 1.2
  • the refractive index n 1 of the protective layer 20 is 1.5
  • the measured refractive index n 3 of the finger is about 1.42 .
  • the refractive index of the second adhesive layer 60 is not limited to the above-mentioned 1.2, and may also be 1.1 or 1.3, etc., and it only needs to be greater than or equal to 1.1 and less than or equal to 1.3.
  • the refractive index is not limited to the above-mentioned 1.5, and may be 1.6 or 1.7, etc., and it only needs to be greater than or equal to 1.5 and less than or equal to 1.7.
  • the display panel 100 further includes a collimation grating structure 70 , and the collimation grating structure 70 is disposed on a side of the optical sensor 40 close to the display panel main body 10 .
  • the function of the collimating grating structure 70 is to provide a collimated light path, converging the infrared light carrying the fingerprint feature information reflected by the finger and penetrating the display panel main body 10, so as to increase the number of fingerprints carried by the optical sensor 40. Infrared rays of information, thereby improving the accuracy of fingerprint identification of electronic devices.
  • Figure 8 is a schematic cross-sectional view of the second type of display panel provided in the embodiment of the present application along the A-A direction.
  • the difference from the first type of display panel shown in Figure 2 is that the second type of display panel shown in Figure 8
  • the display panel does not include the collimation grating structure 70 , but adopts the microlens array structure 80 , and the microlens array structure 80 is disposed on the side of the optical sensor 40 close to the display panel main body 10 .
  • the microlens array structure 80 is composed of a plurality of lenses arranged in an array, and its function is the same as that of the collimating grating structure 70 , which will not be repeated here.
  • the embodiments of the present application provide a display panel and an electronic device, the electronic device includes the display panel, and the display panel includes a display panel main body, a protective layer, a light source module, and an optical sensor.
  • the protective layer is arranged on the light-emitting side of the display panel body, the light-emitting surface of the light source module faces the light-incident surface of the protective layer, and the optical sensor is arranged on the side of the display panel body away from the protective layer.
  • the outgoing light emitted by the light source module enters the protective layer along a first direction, and the included angle between the first direction and the thickness direction of the protective layer is larger than that of the outgoing light on the protective layer.
  • the critical angle of the light-emitting surface makes the light emitted by the optical module realize total reflection in the protective layer.

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Abstract

一种显示面板（100）及电子装置，电子装置包括显示面板（100），显示面板（100）包括显示面板主体（10）、保护层（20）、光源模组（30）以及光学传感器（40），光源模组（30）发出的出射光线在保护层（20）中能够全反射，手指（200）触碰保护层（20）对应显示区（110）的任意区域，照射至手指（200）的光线可以被反射至光学传感器（40），如此可以增大屏下指纹识别的范围。

Description

显示面板及电子装置 技术领域
本申请涉及显示技术领域，尤其涉及一种显示面板及电子装置。
 背景技术
近年来随着电子技术的发展，手机、平板等移动式显示电子装置已成为人们日常生活中必不可少的社交媒介与信息存储载体。对于此类产品，用于在追求便携、全面屏、轻薄等时尚外观特性的同时，对于个人隐私的保护也提出强烈需求。指纹识别作为移动电子装置的身份识别方式已得到广泛应用，且具有相应的法律效应。
 技术问题
目前，主流的指纹识别技术为电容式和光学式，电容式基本应用于液晶显示装置（liquid crystal display, LCD），通常位于电子装置的背面、下边框处或侧面。这种方式不但有损电子装置的美观性，且随着屏占比的不断提升，电容式指纹识别模组无处放置。光学式基本上应用于有机发光二极管（organic light emitting diode, OLED）显示装置，指纹识别区域可以位于显示区，使得电子装置可以具有良好的美观性。虽然以上两种方案目前已得到广泛的应用，但均采用的是单点式指纹识别工作方式，指纹识别只能固定在特定的小区域范围内，在操作上欠缺便携性。
综上所述，现有显示面板及电子装置存在指纹识别只能固定在特定的小区域范围内的问题。故，有必要提供一种显示面板及电子装置来改善这一缺陷。
 技术解决方案
本申请实施例提供一种显示面板及电子装置，用于解决现有显示面板及电子装置存在的指纹识别只能固定在特定的小区域范围内的问题。
本申请实施例提供一种显示面板，包括：
显示面板主体；
保护层，设置于所述显示面板主体的出光侧；
光源模组，所述光源模组的出光面朝向所述保护层的入光面；以及
光学传感器，设置于所述显示面板主体背离所述保护层的一侧；
其中，所述光源模组发出的出射光线沿第一方向射入至所述保护层，在截面视角下，所述第一方向与所述保护层的厚度方向的夹角大于所述出射光线在所述保护层的出光面的临界角。
根据本申请一实施例，所述光源模组包括：
导光件，所述导光件的出光面朝向所述保护层的所述入光面；以及
光源，设置于所述导光件的入光面的侧部。
根据本申请一实施例，所述导光件的表面上设置有反射层，所述反射层暴露出所述导光件的入光面和出光面。
根据本申请一实施例，所述导光件具有与所述出光面相对设置的反射面，所述反射面上设有阵列结构，所述阵列结构具有不平坦的表面。
根据本申请一实施例，所述阵列结构包括沿与所述第一方向相反的方向凸出所述反射面的多个凸部，所述凸部为棱锥、半球体或半椭球体中的任意一种；
或者，所述阵列结构包括由所述反射面沿所述第一方向凹陷的多个凹部，所述凹部的截面呈三角形、半圆形或半椭圆形中的任意一种。
根据本申请一实施例，所述显示面板还包括第一粘胶层，所述第一粘胶层贴合于所述光源模组的所述出光面与所述保护层的所述入光面之间；
其中，所述第一粘胶层的折射率大于所述保护层的折射率。
根据本申请一实施例，所述第一粘胶层的折射率大于或等于1.5且小于或等于1.8。
根据本申请一实施例，所述显示面板还包括第二粘胶层，所述第二粘胶层贴合于所述保护层的入光面；
其中，所述第二粘胶层的折射率小于所述保护层的折射率，手指的折射率小于所述保护层的折射率。
根据本申请一实施例，所述保护层的折射率为n 1，所述第二粘胶层的折射率为n 2，所述手指的折射率为n 3，所述出射光线射入至所述保护层的入射角为α；
其中，arcsin(n 2/n 1)≤α＜arcsin(n 3/n 1)。
根据本申请一实施例，所述第二粘胶层的折射率大于或等于1.1且小于或等于1.3，所述保护层的折射率大于或等于1.4且小于或等于1.6。
根据本申请一实施例，所述显示面板主体包括显示区和围绕所述显示区的边框区，所述光源模组设置于所述边框区内。
本申请实施例还提供一种电子装置，包括显示面板，所述显示面板包括：
显示面板主体；
保护层，设置于所述显示面板主体的出光侧；
光源模组，所述光源模组的出光面朝向所述保护层的入光面；以及
光学传感器，设置于所述显示面板主体背离所述保护层的一侧；
其中，所述光源模组发出的出射光线沿第一方向射入至所述保护层，在截面视角下，所述第一方向与所述保护层的厚度方向的夹角大于所述出射光线在所述保护层的出光面的临界角。
根据本申请一实施例，所述光源模组包括：
导光件，所述导光件的出光面朝向所述保护层的所述入光面；以及
光源，设置于所述导光件的入光面的侧部。
根据本申请一实施例，所述导光件的表面上设置有反射层，所述反射层暴露出所述导光件的入光面和出光面。
根据本申请一实施例，所述导光件具有与所述出光面相对设置的反射面，所述反射面上设有阵列结构，所述阵列结构具有不平坦的表面。
根据本申请一实施例，所述阵列结构包括沿与所述第一方向相反的方向凸出所述反射面的多个凸部，所述凸部为棱锥、半球体或半椭球体中的任意一种；
或者，所述阵列结构包括由所述反射面沿所述第一方向凹陷的多个凹部，所述凹部的截面呈三角形、半圆形或半椭圆形中的任意一种。
根据本申请一实施例，所述显示面板还包括第一粘胶层，所述第一粘胶层贴合于所述光源模组的所述出光面与所述保护层的所述入光面之间；
其中，所述第一粘胶层的折射率大于所述保护层的折射率。
根据本申请一实施例，所述第一粘胶层的折射率大于或等于1.5且小于或等于1.8。
根据本申请一实施例，所述显示面板还包括第二粘胶层，所述第二粘胶层贴合于所述保护层的入光面；
其中，所述第二粘胶层的折射率小于所述保护层的折射率，手指的折射率小于所述保护层的折射率。
根据本申请一实施例，所述保护层的折射率为n 1，所述第二粘胶层的折射率为n 2，所述手指的折射率为n 3，所述出射光线射入至所述保护层的入射角为α；
其中，arcsin(n 2/n 1)≤α＜arcsin(n 3/n 1)。
有益效果
本揭示实施例的有益效果：本申请实施例提供一种显示面板及电子装置，所述电子装置包括所述显示面板，所述显示面板包括显示面板主体、保护层、光源模组以及光学传感器，所述保护层设置于所述显示面板主体的出光侧，所述光源模组的出光面朝向所述保护层的入光面，所述光学传感器设置于所述显示面板主体背离所述保护层的一侧，所述光源模组发出的出射光线沿第一方向射入至所述保护层，所述第一方向与所述保护层的厚度方向的夹角大于所述出射光线在所述保护层的出光面的临界角，使得光学模组发出的光线在保护层中实现全反射，当用于指纹检测的手指触碰保护层对应显示面板的显示区的区域时，照射至手指的光线可以被反射至光学传感器，如此可以增大显示面板及电子装置屏下指纹识别的范围，从而增加指纹识别的便捷性。
 附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是揭示的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的显示面板的平面示意图；
图2为本申请实施例提供的第一种显示面板沿A-A方向的截面示意图；
图3为本申请实施例提供的光源模组的结构示意图；
图4为本申请实施例提供的第一种导光件沿B-B方向的截面示意图；
图5为本申请实施例提供的第二种导光件沿B-B方向的截面示意图；
图6为本申请实施例提供的第三种导光件沿B-B方向的截面示意图；
图7为本申请实施例提供的第四种导光件沿B-B方向的截面示意图；
图8为本申请实施例提供的第二种显示面板沿A-A方向的截面示意图。
 本发明的实施方式
以下各实施例的说明是参考附加的图示，用以例示本揭示可用以实施的特定实施例。本揭示所提到的方向用语，例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本揭示，而非用以限制本揭示。在图中，结构相似的单元是用以相同标号表示。
下面结合附图和具体实施例对本揭示做进一步的说明：
本申请实施例提供一种显示面板及电子装置，所述电子装置包括所述显示面板100。所述电子装置还可以包括壳体，所述显示面板可以安装于所述壳体上，壳体内可以设置有容置空间，所述容置空间可以用于放置主板、印刷电路板、电池等用于驱动所述柔性显示面板所需的电子元件。
在本申请实施例中，所述电子装置可以车载显示终端，例如车载显示器、行车记录仪等，所述电子装置也可以是移动终端，例如智能手机、平板电脑、笔记本电脑等，或者是可穿戴式终端，例如智能手表、智能手环、智能眼镜、增强现实设备等，所述电子装置还可以是固定终端，如台式电脑、电视等，也可以是车载显示终端，如车载显示器或行车记录仪等。
结合图1和图2所示，图1为本申请实施例提供的显示面板的平面示意图，图2为本申请实施例提供的第一种显示面板沿A-A方向的截面示意图，所述显示面板100包括显示面板主体10、保护层20、光源模组30和光学传感器40，所述保护层20设置于所述显示面板主体10的出光侧，用于保护所述显示面板主体10。所述光源模组30的出光面朝向所述保护层20的入光面21，光源模组30用于为光学传感器40提供光源。所述光学传感器40设置于所述显示面板主体10背离所述保护层20的一侧。
在一实施例中，所述显示面板主体10为液晶显示面板，液晶显示面板可以包括背光模组、阵列基板、液晶层和彩膜基板。光源模组30发出的光线照射至保护层20，经手指200反射后可以穿过显示面板主体10并被光学传感器40接收。在实际应用中，显示面板主体10的种类不仅限于上述的液晶显示面板，还可以为有机发光二极管显示面板或者微发光二极管显示面板等其他类型的显示面板。
显示面板100还包括胶框11，胶框11的竖直侧壁上设有卡槽，光源模组30可以固定安装于所述卡槽内。
在一实施例中，所述保护层20为盖板，盖板由透光材料制备形成。在实际应用中，保护层20不仅限于上述的盖板，也可以为透光的硬质涂层。
如图2所示，光源模组30发出的出射光线L1沿第一方向a1射入至所述保护层20，所述第一方向a1与所述保护层20的厚度方向y的夹角α大于所述出射光线L1在所述保护层20的出光面的临界角。如此，可以使光源模组30发出的出射光线L1在保护层20内实现全反射，从而可以使得保护层20的任意区域都可以分布有光源模组30发出的光线。
如图1和图2所示，显示面板100包括显示区110和围绕所述显示区110的边框区120，当手指200与保护层20对应显示区110的区域接触时，手指200可以打破所述光源模组30发出的光线在保护层20内的全反射，并使得照射至手指200的光线从保护层20的入光面21射出，穿过显示面板主体10后被光学传感器40接收，从而可以实现对手指200的光学检测。
在本申请实施例中，如图2所示，手指200的指纹具有间隔分布的脊处210和位于相邻脊处210之间的谷处220。
可以理解的是，当用户的手指200与保护层20对应显示区110的区域中的任意区域接触时，脊处210与保护层20的出光面22之间无空气间隙，脊处210会打破照射至脊处210的光线在保护层20内的全反射，并将该部分光线反射至被光学传感器40接收，使得与脊处210对应的区域会有较多的光线被反射至光学传感器40；谷处220与保护层20的出光面22之间存在空气间隙，照射至保护层20对应谷处220的区域的部分光线的全反射会被破坏，并被反射至光学传感器40，其他部分光线仍会保持全反射，使得与谷处220对应的区域会有较少的光线被反射至光学传感器40，从而形成脊亮谷暗的生物特征信息，即指纹信息。携带指纹信息的光线进入位于保护层20下方的显示面板主体10，进而通过准直光路达到光学传感器40，从而增大显示面板100及电子装置的屏下指纹识别的范围。
结合图1和图2所示，在本申请实施例中，显示面板100可以仅包括一个光源模组30，所述光源模组30可以设置于显示区110下边缘处的边框区120内。在实际应用中，所述光源模组30也可以设置于显示区110上边缘、左边缘或右边缘处的边框区120内。此外，显示面板100也可以包括多个光源模组30，该多个光源模组30可以分布于显示区110的四周边缘处的边框区120内。
结合图2和图3所示，图3为本申请实施例提供的光源模组的结构示意图，所述光源模组30包括导光件31和光源32，光源32设置于导光件31的入光侧，导光件31的出光面朝向保护层20的入光面21。
光源32为红外光源，用于提供用于进行指纹识别所需的红外光线。红外光线可以不被人眼所察觉，且能够穿透显示面板主体10，从而可以在实现屏下指纹识别功能的同时，保证显示面板100的显示效果不受影响。在实际应用中，光源32的种类也不仅限于红外光源，也可以为紫外光源或其他不可见光源等。
在本申请实施例中，导光件31为棒状结构（即导光棒），包括一个出光面310、位于出光面310的相对端的第一入光面311和第二入光面312、位于出光面310相对端且均与第一入光面311和第二入光面312连接的第一连接面313和第二连接面314、以及与出光面310相对设置的反射面315。其中，第一入光面311和第二入光面312均与第一方向a1平行，并垂直于第二方向a2，第一连接面313和第二连接面314与第一方向a1和第二方向a2所界定的平面平行，出光面310平行于第二方向a2并垂直于第一方向a1。
在本申请实施例中，第一方向a1与保护层20的厚度方向y之间的夹角也为α，保护层20的厚度方向y为竖直方向，保护层20的厚度方向y垂直于水平方向x。反射面315垂直连接于所述第一连接面313和第二连接面314，光源32发出的光线经反射面315反射后，可以沿第一方向a1从光源模组30出射，即形成出射光线L1，出射光线L1射入保护层20时的入射角为α，所述入射角α大于42°。
光源模组30具有两个光源32，两个光源32分别与第一入光面311和第二入光面312相对设置。两个光源32分别通过第一入光面311和第二入光面312向导光件31中射入红外光线，以此加导光件31中红外光线的量，使得有更多的光线可以被反射至光学传感器40，从而提高电子装置的指纹识别的准确率。
在本申请实施例中，显示面板100还可以包括第一粘胶层50，所述第一粘胶层50贴合于光源模组30的所述出光面与所述保护层20的所述入光面21之间，所述第一粘胶层50的折射率大于所述保护层20的折射率。
如图2所示，导光件31的出光面310通过第一粘胶层50与保护层20的入光面21贴合。通过在导光件31与保护层20之间设置折射率大于保护层20的第一粘胶层50，可以减小出射光线L1从导光件31射入至保护层20中的折射程度，从而可以使光源32发出的光线更多的进入保护层20中发生全反射，提高光源模组30的光线利用率。
具体的，所述第一粘胶层50的折射率为1.6。在实际应用中，所述第一粘胶层50的折射率不仅限于上述的1.6，还可以为1.5、1.7或1.8等，仅需要大于或等于1.5且小于或等于1.8即可。
进一步的，所述导光件31的表面上设置有反射层316，所述反射层316暴露出所述导光件31的所述入光面和所述出光面。
如图1所示，在本申请实施例中，第一入光面311、第二入光面312、第一连接面313、第二连接面314以及反射面315上均设置有反射层316，反射层316可以避免光源32发出的光线从导光件31除出光面310以外的其他面射出，从而可以提高光源模组30的光线利用率。反射层316可以通过蒸镀、涂布或其他工艺直接在上述各面上形成，反射层316的材料可以包括但不限于Ag或Al等金属材料中的至少一种。
进一步的，所述反射面315设有阵列结构33，所述阵列结构33用于破坏所述光源32发出的光线在所述导光件31中的全反射并使所述光线沿所述第一方向a1出射。
在一实施例中，如图3和图4所示，图4为本申请实施例提供的第一种导光件沿B-B方向的截面示意图，阵列结构33包括沿与第一方向a1相反的方向凸出所述反射面315的多个凸部331，所述凸部331用于打乱光源32发出的光线在所述导光件31中的全反射。当光源32发出的光线照射至凸部331的侧壁时，凸部331可以将该光线沿第一方向a1反射并从导光件31的出光面310射出。所述凸部331与所述导光件31可以通过注塑成型工艺一体成型。
具体的，如图4所示，所述凸部331为半椭球体，在B-B方向的截面呈半椭圆状。在其他一些实施例中，如图5所示，图5本申请实施例提供的第二种导光件沿B-B方向的截面示意图，所述凸部331的形状不仅限于上述的半椭球体，还可以为棱锥或半球体。当所述凸部331为棱锥时，所述凸部331具体可以为三棱锥、四棱锥等，所述凸部331在沿B-B方向的截面呈三角形。
进一步的，如图4所示，所述凸部331在第二方向a2上的宽度d为40微米。在实际应用中，所述凸部331在第二方向a2上的宽度d不仅限于上述的40微米，也可以为30微米、35微米、45微米或50微米等，仅需要大于或等于30微米且小于或等于50微米即可。如此，可以使单个凸部331保持在合理的大小范围，避免凸部331在第二方向a2上的宽度过大导致凸部331打乱导光件31内光线的全反射的效果降低，同时还可以避免凸部331在第二方向a2上的宽度过大导致阵列结构33中凸部331的密度减小进而影响反射面315对光线的反射作用，从而可以保证光源模组30的光线利用率。
进一步的，如图4所示，所述凸部331在所述第一方向a1上的高度h为3微米。在实际应用中，所述凸部331在所述第一方向a1上的高度h不仅限于上述的3微米，也可以为2微米、2.5微米、3.5微米或4微米等，仅需要大于或等于2微米且小于或等于4微米即可。如此，可以避免凸部331的高度h过小导致凸部331对光线的反射作用降低，同时还可以避免凸部331的高度h过大导致红外光线无法传递至导光件31中距离光源32较远的区域，从而可以提高光源模组30的光线利用率。
进一步的，如图4所示，相邻所述凸部331之间的距离b为0.5毫米。在实际应用中，相邻所述凸部331之间的距离b不仅限于上述的0.5毫米，也可以为0.3毫米、0.4毫米或0.6毫米等，仅需要大于或等于0.3毫米且小于或等于0.6毫米即可，如此可以避免相邻凸部331之间的尺寸过大使得阵列结构33中凸部331的密度减小导致阵列结构33对光线的反射作用降低，从而可以保证光源模组30的光线利用率。
在另一实施例中，如图6和图7所示，图6为本申请实施例提供的第三种导光件沿B-B方向的截面示意图，图7为本申请实施例提供的第四种导光件沿B-B方向的截面示意图，阵列结构33包括由所述反射面315沿所述第一方向a1凹陷的多个凹部332。凸部331的作用与图4和图5所示的导光件中的凸部331的作用相同，也是用于打乱光源32发出的光线在所述导光件31中的全反射。
具体的，如图6所示，所述凹部332在所述第一方向a1和第二方向a2所在平面的截面呈半椭圆形，其中第一方向a1和第二方向a2所在的平面即为沿B-B方向的截面，第二方向a2垂直于所述第一方向a1。在实际应用中，所述凹部332沿B-B方向的截面形状不仅限于上述的半椭圆形，也可以为半圆形或如图7所示的三角形。
进一步的，与图4所示的第一种导光件31的凸部331的结构相似，所述凹部332的直径d可以为30微米、35微米、40微米、45微米或50微米等，仅需要大于或等于30微米且小于或等于50微米即可。
所述凹部332在所述第一方向a1上的深度h可以为2微米、2.5微米、3微米、3.5微米或4微米等，仅需要大于或等于2微米且小于或等于4微米即可。
相邻所述凹部332之间的距离b可以为0.3毫米、0.4毫米、0.5毫米或0.6毫米等，仅需要大于或等于0.3毫米且小于或等于0.6毫米即可。
进一步的，如图2所示，所述显示面板100还包括第二粘胶层60，所述第二粘胶层60贴合于所述保护层20的入光面21，所述保护层20通过所述的第二粘胶层60与显示面板主体10贴合。
所述第二粘胶层60的折射率小于所述保护层20的折射率，如此可以保证出射光线L1能够在保护层20内发生全反射。手指200的折射率小于所述保护层20的折射率，可以保证手指200能够破坏保护层20中红外光线的全反射。
进一步的，所述保护层20的折射率为n 1，所述第二粘胶层60的折射率为n 2，手指200为用户的手指，其折射率为n 3，所述出射光线L1射入至所述保护层20的入射角为α，其中上述各折射率满足：arcsin(n 2/n 1)≤α＜arcsin(n 3/n 1)。如此，既可以保证红外光线在保护层20中发生全反射，又可以保证手指的脊处210可以破坏保护层20中红外光线的全反射，实现指纹特征信息的提取。
具体的，在本申请实施例中，所述第二粘胶层60的折射率n 2为1.2，所述保护层20的折射率n 1为1.5，手指的折射率n 3测得为1.42左右。在实际应用中，所述第二粘胶层60的折射率不仅限于上述的1.2，也可以为1.1或1.3等，仅需要大于或等于1.1且小于或等于1.3即可，所述保护层20的折射率不仅限于上述的1.5，也可以为1.6或1.7等，仅需要大于或等于1.5且小于或等于1.7即可。
如图2所示，所述显示面板100还包括准直光栅结构70，所述准直光栅结构70设置于所述光学传感器40靠近所述显示面板主体10的一侧。所述准直光栅结构70的作用在于提供准直光路，收敛经由手指反射并穿透所述显示面板主体10的携带指纹特征信息的红外光线，以此增加光学传感器40接收到的携带有指纹特征信息的红外光线，从而提高电子装置的指纹识别的准确率。
如图8所示，图8为本申请实施例提供的第二种显示面板沿A-A方向的截面示意图，与图2所示的第一种显示面板不同的是，图8所示的第二种显示面板中不包含准直光栅结构70，而是采用微透镜阵列结构80，所述微透镜阵列结构80设置于所述光学传感器40靠近所述显示面板主体10的一侧。所述微透镜阵列结构80由多个呈阵列排布的透镜组成，其作用与所述准直光栅结构70的作用相同，此处不再赘述。
本申请实施例的有益效果：本申请实施例提供一种显示面板及电子装置，所述电子装置包括所述显示面板，所述显示面板包括显示面板主体、保护层、光源模组以及光学传感器，所述保护层设置于所述显示面板主体的出光侧，所述光源模组的出光面朝向所述保护层的入光面，所述光学传感器设置于所述显示面板主体背离所述保护层的一侧，所述光源模组发出的出射光线沿第一方向射入至所述保护层，所述第一方向与所述保护层的厚度方向的夹角大于所述出射光线在所述保护层的出光面的临界角，使得光学模组发出的光线在保护层中实现全反射，当用于指纹检测的手指触碰保护层对应显示面板主体的显示区的任意区域时，照射至手指的光线可以被反射至光学传感器，如此可以增大显示面板及电子装置屏下指纹识别的范围，从而增加指纹识别的便捷性。
综上所述，虽然本申请以优选实施例揭露如上，但上述优选实施例并非用以限制本申请，本领域的普通技术人员，在不脱离本申请的精神和范围内，均可作各种更动与润饰，因此本申请的保护范围以权利要求界定的范围为基准。

Claims (20)

  1. 一种显示面板，包括：
    显示面板主体；
    保护层，设置于所述显示面板主体的出光侧；
    光源模组，所述光源模组的出光面朝向所述保护层的入光面；以及
    光学传感器，设置于所述显示面板主体背离所述保护层的一侧；
    其中，所述光源模组发出的出射光线沿第一方向射入至所述保护层，在截面视角下，所述第一方向与所述保护层的厚度方向的夹角大于所述出射光线在所述保护层的出光面的临界角。
  2. 如权利要求1所述的显示面板，其中，所述光源模组包括：
    导光件，所述导光件的出光面朝向所述保护层的所述入光面；以及
    光源，设置于所述导光件的入光面的侧部。
  3. 如权利要求2所述的显示面板，其中，所述导光件的表面上设置有反射层，所述反射层暴露所述导光件的所述入光面和所述出光面。
  4. 如权利要求2所述的显示面板，其中，所述导光件具有与所述出光面相对设置的反射面，所述反射面上设有阵列结构，所述阵列结构具有不平坦的表面。
  5. 如权利要求4所述的显示面板，其中，所述阵列结构包括沿与所述第一方向相反的方向凸出所述反射面的多个凸部，所述凸部为棱锥、半球体或半椭球体中的任意一种；
    或者，所述阵列结构包括由所述反射面沿所述第一方向凹陷的多个凹部，所述凹部的截面呈三角形、半圆形或半椭圆形中的任意一种。
  6. 如权利要求1所述的显示面板，其中，所述显示面板还包括第一粘胶层，所述第一粘胶层贴合于所述光源模组的所述出光面与所述保护层的所述入光面之间；
    其中，所述第一粘胶层的折射率大于所述保护层的折射率。
  7. 如权利要求6所述的显示面板，其中，所述第一粘胶层的折射率大于或等于1.5且小于或等于1.8。
  8. 如权利要求1所述的显示面板，其中，所述显示面板还包括第二粘胶层，所述第二粘胶层贴合于所述保护层的入光面；
    其中，所述第二粘胶层的折射率小于所述保护层的折射率，手指的折射率小于所述保护层的折射率。
  9. 如权利要求8所述的显示面板，其中，所述保护层的折射率为n 1，所述第二粘胶层的折射率为n 2，所述手指的折射率为n 3，所述出射光线射入至所述保护层的入射角为α；
    其中，arcsin(n 2/n 1)≤α＜arcsin(n 3/n 1)。
  10. 如权利要求8所述的显示面板，其中，所述第二粘胶层的折射率大于或等于1.1且小于或等于1.3，所述保护层的折射率大于或等于1.5且小于或等于1.7。
  11. 如权利要求1所述的显示面板，其中，所述显示面板主体包括显示区和围绕所述显示区的边框区，所述光源模组设置于所述边框区内。
  12. 一种电子装置，包括显示面板，所述显示面板包括：
    显示面板主体；
    保护层，设置于所述显示面板主体的出光侧；
    光源模组，所述光源模组的出光面朝向所述保护层的入光面；以及
    光学传感器，设置于所述显示面板主体背离所述保护层的一侧；
    其中，所述光源模组发出的出射光线沿第一方向射入至所述保护层，在截面视角下，所述第一方向与所述保护层的厚度方向的夹角大于所述出射光线在所述保护层的出光面的临界角。
  13. 如权利要求12所述的电子装置，其中，所述光源模组包括：
    导光件，所述导光件的出光面朝向所述保护层的所述入光面；以及
    光源，设置于所述导光件的入光面的侧部。
  14. 如权利要求13所述的电子装置，其中，所述导光件的表面上设置有反射层，所述反射层暴露所述导光件的所述入光面和所述出光面。
  15. 如权利要求13所述的电子装置，其中，所述导光件具有与所述出光面相对设置的反射面，所述反射面上设有阵列结构，所述阵列结构具有不平坦的表面。
  16. 如权利要求15所述的电子装置，其中，所述阵列结构包括沿与所述第一方向相反的方向凸出所述反射面的多个凸部，所述凸部为棱锥、半球体或半椭球体中的任意一种；
    或者，所述阵列结构包括由所述反射面沿所述第一方向凹陷的多个凹部，所述凹部的截面呈三角形、半圆形或半椭圆形中的任意一种。
  17. 如权利要求12所述的电子装置，其中，所述显示面板还包括第一粘胶层，所述第一粘胶层贴合于所述光源模组的所述出光面与所述保护层的所述入光面之间；
    其中，所述第一粘胶层的折射率大于所述保护层的折射率。
  18. 如权利要求17所述的电子装置，其中，所述第一粘胶层的折射率大于或等于1.5且小于或等于1.8。
  19. 如权利要求12所述的电子装置，其中，所述显示面板还包括第二粘胶层，所述第二粘胶层贴合于所述保护层的入光面；
    其中，所述第二粘胶层的折射率小于所述保护层的折射率，手指的折射率小于所述保护层的折射率。
  20. 如权利要求19所述的电子装置，其中，所述保护层的折射率为n 1，所述第二粘胶层的折射率为n 2，所述手指的折射率为n 3，所述出射光线射入至所述保护层的入射角为α；
    其中，arcsin(n 2/n 1)≤α＜arcsin(n 3/n 1)。
PCT/CN2021/112555 2021-08-06 2021-08-13 显示面板及电子装置 WO2023010612A1 (zh)

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