CN112069935A - Display panel, display device and manufacturing method of display panel - Google Patents
Display panel, display device and manufacturing method of display panel Download PDFInfo
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- CN112069935A CN112069935A CN202010850984.8A CN202010850984A CN112069935A CN 112069935 A CN112069935 A CN 112069935A CN 202010850984 A CN202010850984 A CN 202010850984A CN 112069935 A CN112069935 A CN 112069935A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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- 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
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Abstract
The embodiment of the invention discloses a display panel, a display device and a manufacturing method of the display panel. The display panel includes: the light emitting device comprises a substrate and a plurality of light emitting structures arranged on the substrate; the light-emitting structure comprises a light-emitting functional layer and a first electrode, wherein the first electrode is arranged on one side of the light-emitting functional layer, which is far away from the substrate; the display panel also comprises a plurality of auxiliary electrodes arranged on the same layer as the first electrodes, the auxiliary electrodes are arranged in the fingerprint identification area of the display panel, and the auxiliary electrodes are insulated from the first electrodes; the display panel also comprises an encapsulation layer and a fingerprint identification layer; the packaging layer is arranged on one side, far away from the substrate, of the light-emitting structure, the fingerprint identification layer is arranged on one side, far away from the substrate, of the packaging layer, and the fingerprint identification layer is located in the fingerprint identification area; the fingerprint identification layer comprises a fingerprint identification electrode; the vertical projection of the auxiliary electrode on the substrate is at least partially overlapped with the vertical projection of the fingerprint identification electrode on the substrate. The invention improves the fingerprint identification precision.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display panel, a display device and a manufacturing method of the display panel.
Background
Organic Light-Emitting Diode (OLED) display devices are widely used because of their advantages of self-luminescence, wide viewing angle, high contrast, low power consumption, high response rate, and full color.
However, the existing OLED display panel has low fingerprint identification accuracy.
Disclosure of Invention
The invention provides a display panel, a display device and a manufacturing method of the display panel, and aims to improve the fingerprint identification precision of the display panel.
In a first aspect, an embodiment of the present invention provides a display panel, including:
the light emitting device comprises a substrate and a plurality of light emitting structures arranged on the substrate; the light-emitting structure comprises a light-emitting functional layer and a first electrode, wherein the first electrode is arranged on one side of the light-emitting functional layer, which is far away from the substrate;
the display panel further comprises a plurality of auxiliary electrodes arranged on the same layer as the first electrodes, the auxiliary electrodes are arranged in the fingerprint identification area of the display panel, and the auxiliary electrodes are insulated from the first electrodes;
the display panel further comprises a fingerprint identification layer; the fingerprint identification layer is arranged on one side of the first electrode, which is far away from the substrate, and the fingerprint identification layer is positioned in the fingerprint identification area; the fingerprint identification layer comprises a fingerprint identification electrode, and the fingerprint identification electrode is insulated from the first electrode;
the vertical projection of the auxiliary electrode on the substrate at least partially overlaps with the vertical projection of the fingerprint identification electrode on the substrate.
Optionally, the fingerprint identification electrode comprises a plurality of first sub-electrodes and a plurality of second sub-electrodes;
the vertical projection of the auxiliary electrode on the substrate at least partially overlaps with the vertical projection of the first sub-electrode on the substrate.
Optionally, the first sub-electrode is an induction electrode, and the second sub-electrode is a driving electrode.
Optionally, the display panel further includes:
the touch layer is arranged on one side, away from the substrate, of the first electrode;
the fingerprint identification layer and the touch layer are arranged on the same layer.
Optionally, the display panel further includes:
an encapsulation layer covering the light emitting structure;
the fingerprint identification layer is arranged in the packaging layer or arranged on one side of the packaging layer far away from the substrate.
Optionally, the auxiliary electrode and the first sub-electrode have the same shape.
Optionally, the first sub-electrodes extend along a first direction, and the plurality of first sub-electrodes are sequentially arranged along a second direction;
the second sub-electrodes extend along a second direction, and the plurality of second sub-electrodes are sequentially arranged along the first direction;
wherein the first direction and the second direction cross each other;
the first sub-electrode and the second sub-electrode are both strip-shaped; or the first sub-electrodes comprise a plurality of first diamond-shaped conductive blocks which are adjacent to each other along a first direction and electrically connected, and the second sub-electrodes comprise a plurality of second diamond-shaped conductive blocks which are adjacent to each other along a second direction and electrically connected.
Optionally, the auxiliary electrode extends along a first direction;
the auxiliary electrode is strip-shaped, or the auxiliary electrode comprises a plurality of third diamond-shaped conductive blocks, and the third diamond-shaped conductive blocks adjacent to each other along the first direction are electrically connected.
In a second aspect, an embodiment of the present invention further provides a display device, including the display panel according to any embodiment of the present invention.
In a third aspect, an embodiment of the present invention further provides a method for manufacturing a display panel, including:
providing a substrate;
providing a plurality of light emitting structures and a plurality of auxiliary electrodes on the substrate; the light-emitting structure comprises a light-emitting functional layer and a first electrode, wherein the first electrode is arranged on one side, far away from the substrate, of the light-emitting functional layer; the auxiliary electrode and the first electrode are arranged on the same layer, the auxiliary electrode is arranged in a fingerprint identification area of the display panel, and the auxiliary electrode and the first electrode are insulated from each other;
setting a fingerprint identification layer; the fingerprint identification layer is arranged on one side, far away from the substrate, of the first electrode, and the fingerprint identification layer is located in a fingerprint identification area of the display panel; the fingerprint identification layer comprises a fingerprint identification electrode; the fingerprint identification electrode and the first electrode are insulated from each other, and the vertical projection of the auxiliary electrode on the substrate and the vertical projection of the fingerprint identification electrode on the substrate at least partially overlap.
According to the embodiment of the invention, the auxiliary electrode which is the same layer as the first electrode and is insulated with the first electrode is arranged in the fingerprint identification area, and the vertical projection of the auxiliary electrode on the substrate is at least partially overlapped with the vertical projection of the fingerprint identification electrode on the substrate, so that mutual capacitance can be formed between the auxiliary electrode and the fingerprint identification electrode, the capacitance value detected on the fingerprint identification electrode is increased, and the fingerprint identification precision is improved. Because the auxiliary electrode and the first electrode are arranged in the same layer, the auxiliary electrode and the first electrode can be made of the same material and formed in the same process, and therefore the scheme of the embodiment ensures that the fingerprint identification precision is improved while the process cost is lower.
Drawings
Fig. 1 is a schematic top view of a display panel provided in this embodiment;
FIG. 2 is a cross-sectional view of the display panel of FIG. 1 along line AA;
fig. 3 is a schematic cross-sectional view of another display panel provided in this embodiment;
fig. 4 is a schematic cross-sectional view of another display panel provided in this embodiment;
FIG. 5 is a schematic top view of another display panel provided in this embodiment;
FIG. 6 is a schematic top view of yet another display panel provided in this embodiment;
FIG. 7 is a schematic diagram of a fingerprint identification area provided in this embodiment;
FIG. 8 is a schematic diagram of another fingerprint identification area provided in this embodiment;
fig. 9 is a schematic view of a display device provided in this embodiment;
fig. 10 is a flowchart of a method for manufacturing a display panel according to this embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
With the rise of the full screen technology, fingerprint identification is gradually developed from the design outside the display panel to the design inside the display panel, namely, the under-screen fingerprint identification technology. The capacitive fingerprint identification module is high in transparency and similar to a capacitive touch module in process, and can be well integrated with a capacitive touch display panel, so that the capacitive fingerprint identification module becomes a hotspot for research of panel manufacturers. However, the size of current capacitanc fingerprint identification module is less for integrated the size of each fingerprint identification unit behind the display panel is less, leads to the capacitance value of fingerprint identification unit less, and the fingerprint identification precision is lower.
In view of the above problems, the present embodiment provides a display panel, fig. 1 is a schematic top view of the display panel provided in the present embodiment, and fig. 2 is a schematic cross-sectional view of the display panel in fig. 1 along a sectional line AA. Referring to fig. 1 and 2, the display panel includes:
a substrate 10 and a plurality of light emitting structures 20 disposed on the substrate 10; the light emitting structure 20 includes a light emitting functional layer 21 and a first electrode 22, the first electrode 22 is disposed on a side of the light emitting functional layer 21 away from the substrate 10;
the display panel further comprises a plurality of auxiliary electrodes 30 arranged on the same layer as the first electrodes 22, the auxiliary electrodes 30 are arranged in the fingerprint identification area 40 of the display panel, and the auxiliary electrodes 30 are insulated from the first electrodes 22;
the display panel further comprises a fingerprint identification layer 60; the fingerprint identification layer 60 is arranged on the side of the first electrode 22 far away from the substrate 10, and the fingerprint identification layer 60 is located in the fingerprint identification area 40; the fingerprint identification layer 60 comprises a fingerprint identification electrode 61, and the fingerprint identification electrode 61 is insulated from the first electrode 22;
the vertical projection of the auxiliary electrode 30 on the substrate 10 at least partially overlaps the vertical projection of the fingerprint recognition electrode 61 on the substrate 10.
The substrate 10 may be an array substrate for driving the light emitting structure 20 to emit light, and the substrate 10 may include a substrate and a driving circuit layer. The first electrode 22 may be a cathode, and the light emitting structure 20 may further include a second electrode, which may be an anode. The light emitting function layer 21 may include film layers such as an organic light emitting layer, an electron injection side, an electron transport layer, a hole injection layer, and a hole transport layer. The first electrode 22 of the conventional display panel is usually a whole layer, and in this embodiment, the auxiliary electrode 30 and the first electrode 22 are disposed in the same layer and are insulated from each other, that is, the first electrode 22 of the fingerprint identification area 40 is imaged, a portion of the first electrode 22 between the adjacent light emitting structures 20 is removed, and the auxiliary electrode 30 is disposed in the area between the adjacent light emitting structures 20. The fingerprint identification electrode 61 may be a mutual capacitance type fingerprint identification electrode or a self capacitance type fingerprint identification electrode. The fingerprint identification electrode 61 and the first electrode 22 are insulated from each other, and an insulating layer is included between the fingerprint identification electrode 61 and the first electrode 22, for example, the fingerprint identification electrode 61 may be disposed on a side of the encapsulation layer 50 away from the substrate 10, or the fingerprint identification electrode 61 may be disposed inside the encapsulation layer 50, for example, may be disposed in an organic layer of the encapsulation layer 50 or on a surface of the organic layer.
When the fingerprint identification electrode 61 is a self-capacitance fingerprint identification electrode, the auxiliary electrode 30 and the fingerprint identification electrode 61 are overlapped in the vertical projection of the substrate 10, the auxiliary electrode 30 and the fingerprint identification electrode 61 form a mutual capacitance, the capacitance detected on the fingerprint identification electrode 61 can include the self-capacitance of the fingerprint identification electrode 61 and the mutual capacitance between the auxiliary electrode 30 and the fingerprint identification electrode 61, that is, the auxiliary electrode 30 enhances the fingerprint identification capacitance value detected on the fingerprint identification electrode 61, thereby improving the fingerprint identification precision.
When the fingerprint identification electrode 61 is a mutual capacitance fingerprint identification electrode, the fingerprint identification electrode 61 may include a driving electrode and a sensing electrode, and the auxiliary electrode 30 may overlap with the sensing electrode in the vertical projection of the substrate 10, so as to increase the mutual capacitance value detected on the sensing electrode, thereby improving the fingerprint identification precision. The auxiliary electrode 30 may also overlap with the vertical projection of the driving electrode on the substrate 10, the original sensing electrode in the fingerprint identification electrode 61 may be electrically connected to the auxiliary electrode 30, the auxiliary electrode 30 and the original sensing electrode are jointly used as a sensing electrode, and the mutual capacitance between the sensing electrode and the driving electrode may be increased by overlapping the vertical projection of the auxiliary electrode 30 and the driving electrode on the substrate 10, so as to increase the capacitance value detected on the sensing electrode, and improve the fingerprint identification accuracy.
In the present embodiment, the auxiliary electrode 30 is disposed in the fingerprint identification area 40, and is insulated from the first electrode 22, and the vertical projection of the auxiliary electrode 30 on the substrate 10 and the vertical projection of the fingerprint identification electrode 61 on the substrate 10 are at least partially overlapped, so that a mutual capacitance can be formed between the auxiliary electrode 30 and the fingerprint identification electrode 61, and the capacitance value detected on the fingerprint identification electrode 61 is increased, thereby improving the fingerprint identification accuracy. Because the auxiliary electrode 30 and the first electrode 22 are disposed on the same layer, the auxiliary electrode 30 and the first electrode 22 may be made of the same material and formed in the same process, and thus the scheme of the embodiment improves the fingerprint identification accuracy while ensuring lower process cost.
Optionally, the display panel further includes an encapsulation layer 50, and the encapsulation layer 50 covers the light emitting structure 20; the fingerprint identification layer 60 is disposed in the encapsulation layer 50 or disposed on a side of the encapsulation layer 50 away from the substrate 10.
The encapsulation layer 50 may be a thin film encapsulation layer, and the encapsulation layer 50 may include an inorganic layer and an organic layer. When the fingerprint identification layer 60 is disposed in the encapsulation layer 50, a part of the encapsulation layer 50 may be formed first, for example, an inorganic layer and an organic layer may be formed first, and the fingerprint identification layer 60 may be formed on the surface of the organic layer. When the fingerprint identification layer 60 is disposed on a side of the package layer 50 away from the substrate 10, the fingerprint identification layer 60 may be formed on the surface of the package layer 50, or on the surface of another layer of the package layer 50 away from the substrate 10, such as a polarizer or a cover plate.
It should be noted that fig. 2 only illustrates the case where the fingerprint identification layer 60 is disposed on the surface of the encapsulation layer 50, and the present invention is not limited thereto.
Fig. 3 is a schematic cross-sectional view of another display panel provided in this embodiment, and referring to fig. 3, optionally, the fingerprint identification electrode includes a plurality of first sub-electrodes 611 and a plurality of second sub-electrodes 612;
the perpendicular projection of the auxiliary electrode 30 on the substrate 10 at least partially overlaps the perpendicular projection of the first sub-electrode 611 on the substrate 10.
Specifically, the first sub-electrode 611 may be a sensing electrode, and the second sub-electrode 612 may be a driving electrode. During fingerprint detection, by arranging that the vertical projection of the auxiliary electrode 30 on the substrate 10 is at least partially overlapped with the vertical projection of the first sub-electrode 611 on the substrate 10, mutual capacitance is formed between the auxiliary electrode 30 and the first sub-electrode 611, and meanwhile, mutual capacitance can also be formed between the second sub-electrode 612 and the first sub-electrode 611, so that fingerprint identification capacitance is increased, and fingerprint identification accuracy is improved.
In addition, the first sub-electrode 611 may be a driving electrode, and the second sub-electrode 612 may be a sensing electrode. At this time, the second sub-electrode 612 may be electrically connected to the auxiliary electrode 30, the second sub-electrode 612 and the auxiliary electrode 30 may be used as sensing electrodes, and since the projections of the auxiliary electrode 30 and the first sub-electrode 611 on the substrate 10 overlap, the fingerprint identification capacitance includes a mutual capacitance between the auxiliary electrode 30 and the first sub-electrode 611 and a mutual capacitance between the first sub-electrode 611 and the second sub-electrode 612, so that the fingerprint identification capacitance detected on the second sub-electrode 612 is increased, and the fingerprint identification accuracy is improved.
Optionally, the vertical projection of the auxiliary electrode 30 on the substrate 10 may coincide with the vertical projection of the first sub-electrode 612 on the substrate 10, so as to increase the fingerprint identification capacitance to the maximum extent and improve the fingerprint identification accuracy.
Optionally, the first sub-electrode 611 is a sensing electrode, and the second sub-electrode 612 is a driving electrode.
Specifically, the auxiliary electrode 30 may be used as a driving electrode, and when fingerprint identification is performed, the driving signal is provided to the auxiliary electrode 30 and the second sub-electrode 612, and the sensing signal on the first sub-electrode 611 is detected to detect the size of the fingerprint identification capacitor, so as to identify a fingerprint pattern according to the size of the capacitor. By arranging the auxiliary electrode 30 to overlap with the sensing electrode, a through hole structure is not required to be arranged in the display area to electrically connect the second sub-electrode 612 and the auxiliary electrode 30, and the like, so that the process difficulty is reduced.
In addition, display panel still includes the fingerprint identification chip, and auxiliary electrode and fingerprint identification electrode all are connected with the fingerprint identification chip electricity. When fingerprint identification is carried out, the fingerprint identification chip provides a driving signal for a driving electrode and a fingerprint identification electrode auxiliary electrode in the fingerprint identification electrode, receives an induction signal on the induction electrode, and determines the size of a fingerprint identification capacitor according to the induction signal.
Fig. 4 is a schematic cross-sectional view of another display panel provided in this embodiment, and referring to fig. 4, optionally, the display panel further includes:
the touch layer 70, the touch layer 70 is disposed on a side of the first electrode 22 away from the substrate 10;
the fingerprint identification layer 60 and the touch layer 70 are disposed on the same layer.
The touch layer 70 includes touch electrodes, which may be self-capacitance touch electrodes or mutual capacitance touch electrodes. The fingerprint identification layer 60 and the touch layer 70 are arranged on the same layer, and the fingerprint identification electrode and the touch electrode can be prepared in the same process by adopting the same material, so that the process cost is reduced.
It should be noted that the touch electrode and the fingerprint identification electrode may be prepared by a metal mesh (metal mesh) process.
Optionally, referring to fig. 4, the display panel further includes:
a pixel defining layer 80, the pixel defining layer 80 being disposed between the adjacent light emitting structures 20, and the auxiliary electrode 30 being disposed on a surface of the pixel defining layer 80 away from the substrate 10.
Specifically, the pixel defining layer 80 is used to define a plurality of light emitting structures 20, and the first electrode 22 is disposed on a surface of the pixel defining layer 80 away from the substrate 10. In manufacturing the display panel, in general, a pixel defining layer 80 is formed on the surface of the substrate 10, the pixel defining layer 80 includes a plurality of pixel openings, a light-emitting function layer 21 is formed in each pixel opening, and then a first electrode 22 is formed, and the first electrode 22 covers the light-emitting function layer 21 and the pixel defining layer 80. In this embodiment, the auxiliary electrode 30 may be formed simultaneously when the first electrode 22 is formed by using a mask, and the first electrode 22 and the auxiliary electrode 80 are formed simultaneously on the surface of the pixel defining layer 80, so that the fingerprint identification capacitance may be increased without adding a new film layer in the display panel, and the fingerprint identification accuracy may be improved.
The material used for the first electrode 22 and the auxiliary electrode 30 may be a transparent metal oxide such as ITO or IZO, or may be a transparent metal such as Ag, Mg, or Ag. When transparent metal such as Ag, Mg, or Ag is used, the thickness of the first electrode 22 is less than 15 μm, which ensures that the first electrode 22 has high light transmittance.
Optionally, the auxiliary electrode and the first sub-electrode are the same in shape.
Set up like this for auxiliary electrode can guarantee to have bigger overlap area with first sub-electrode when occupying less space, guarantees the improvement fingerprint identification precision of great degree.
Fig. 5 is a schematic top view of another display panel provided in this embodiment, and fig. 6 is a schematic top view of another display panel provided in this embodiment. Alternatively, referring to fig. 5 and 6, the first sub-electrodes 611 extend along the first direction X, and the plurality of first sub-electrodes 611 are sequentially arranged along the second direction Y; the second sub-electrodes 612 extend along the second direction Y, and the plurality of second sub-electrodes 612 are sequentially arranged along the first direction X; wherein the first direction X and the second direction Y are mutually intersecting;
referring to fig. 5, the first sub-electrode 611 and the second sub-electrode 612 are both stripe-shaped; alternatively, referring to fig. 6, the first sub-electrode 611 includes a plurality of first diamond-shaped conductive blocks electrically connected to adjacent first diamond-shaped conductive blocks along the first direction X, and the second sub-electrode 612 includes a plurality of second diamond-shaped conductive blocks electrically connected to adjacent second diamond-shaped conductive blocks along the second direction Y.
Wherein the first direction X and the second direction Y may be perpendicular to each other. The touch electrode may include a touch driving electrode and a touch sensing electrode, the touch driving electrode may be disposed on the same layer as the first sub-electrode, and the touch sensing electrode may be disposed on the same layer as the second sub-electrode. When the first sub-electrode 611 and the second sub-electrode 612 are in the shape of a bar, the touch sensing electrode and the touch driving electrode may also be in the shape of a bar, and when the first sub-electrode 611 and the second sub-electrode 612 are composed of diamond conductive blocks, the touch sensing electrode and the touch driving electrode in the touch electrode may also be composed of diamond conductive blocks, and the touch sensing electrode and the touch driving electrode may be respectively prepared in the same process as the first sub-electrode 611 and the second sub-electrode 612.
In addition, referring to fig. 4, when the first sub-electrode 611 and the second sub-electrode 612 are composed of diamond-shaped conductive blocks, in manufacturing, a first conductive film may be first manufactured on the encapsulation layer 50, the first conductive film is patterned to form the second sub-electrode 612 and the first diamond-shaped conductive blocks, then an insulating layer is deposited, the insulating layer is patterned to form a plurality of bridging through holes, then a second conductive film is formed, and the second conductive film is patterned to form bridging metal connecting the first diamond-shaped conductive blocks.
Fig. 7 is a schematic view of a fingerprint identification area provided in this embodiment, fig. 8 is a schematic view of another fingerprint identification area provided in this embodiment, and alternatively, referring to fig. 7 and 8, the auxiliary electrode 30 extends along the first direction X;
referring to fig. 7, the auxiliary electrode 30 has a bar shape, or, referring to fig. 8, the auxiliary electrode 30 includes a plurality of third diamond-shaped conductive blocks, and the third diamond-shaped conductive blocks adjacent to each other in the first direction X are electrically connected.
Specifically, referring to fig. 7 and 8, when the first sub-electrode 611 has a bar shape, the auxiliary electrode 30 may have a bar shape, and when the first sub-electrode 611 includes a plurality of first diamond-shaped conductive blocks, the auxiliary electrode 30 may include a plurality of third diamond-shaped conductive blocks. The arrangement is such that the auxiliary electrode 30 occupies a smaller area, i.e., has a larger overlapping area with the first sub-electrode 611.
It should be noted that, in the present embodiment, the size of each third conductive diamond in the auxiliary electrode 30 is not specifically limited.
Fig. 9 is a schematic view of a display device provided in this embodiment, and referring to fig. 9, the display device includes a display panel according to any embodiment of the present invention.
Fig. 10 is a flowchart of a method for manufacturing a display panel provided in this embodiment, and referring to fig. 10, the method includes:
And step 130, setting a fingerprint identification layer. The fingerprint sealing identification layer is arranged on one side, far away from the substrate, of the first electrode, and the fingerprint identification layer is located in a fingerprint identification area of the display panel; the fingerprint identification layer comprises a fingerprint identification electrode; the fingerprint identification electrode and the first electrode are mutually insulated, and the vertical projection of the auxiliary electrode on the substrate and the vertical projection of the fingerprint identification electrode on the substrate are at least partially overlapped.
The manufacturing method of the display panel provided by the embodiment of the invention belongs to the same inventive concept as the display panel provided by any embodiment of the invention, has corresponding beneficial effects, and does not refer to the display panel provided by any embodiment of the invention in detail without detailed technical details in the embodiment.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A display panel, comprising:
the light emitting device comprises a substrate and a plurality of light emitting structures arranged on the substrate; the light-emitting structure comprises a light-emitting functional layer and a first electrode, wherein the first electrode is arranged on one side of the light-emitting functional layer, which is far away from the substrate;
the display panel further comprises a plurality of auxiliary electrodes arranged on the same layer as the first electrodes, the auxiliary electrodes are arranged in the fingerprint identification area of the display panel, and the auxiliary electrodes are insulated from the first electrodes;
the display panel further comprises a fingerprint identification layer; the fingerprint identification layer is arranged on one side of the first electrode, which is far away from the substrate, and the fingerprint identification layer is positioned in the fingerprint identification area; the fingerprint identification layer comprises a fingerprint identification electrode, and the fingerprint identification electrode is insulated from the first electrode;
the vertical projection of the auxiliary electrode on the substrate at least partially overlaps with the vertical projection of the fingerprint identification electrode on the substrate.
2. The display panel according to claim 1, characterized in that:
the fingerprint identification electrode comprises a plurality of first sub-electrodes and a plurality of second sub-electrodes;
the vertical projection of the auxiliary electrode on the substrate at least partially overlaps with the vertical projection of the first sub-electrode on the substrate.
3. The display panel according to claim 2, wherein the first sub-electrode is a sensing electrode and the second sub-electrode is a driving electrode.
4. The display panel according to claim 1, further comprising:
the touch layer is arranged on one side, away from the substrate, of the first electrode;
the fingerprint identification layer and the touch layer are arranged on the same layer.
5. The display panel according to claim 1, further comprising:
an encapsulation layer covering the light emitting structure;
the fingerprint identification layer is arranged in the packaging layer or arranged on one side of the packaging layer far away from the substrate.
6. The display panel according to claim 2, characterized in that:
the auxiliary electrode and the first sub-electrode are the same in shape.
7. The display panel according to claim 2, characterized in that:
the first sub-electrodes extend along a first direction, and the plurality of first sub-electrodes are sequentially arranged along a second direction;
the second sub-electrodes extend along a second direction, and the plurality of second sub-electrodes are sequentially arranged along the first direction;
wherein the first direction and the second direction cross each other;
the first sub-electrode and the second sub-electrode are both strip-shaped; or the first sub-electrodes comprise a plurality of first diamond-shaped conductive blocks which are adjacent to each other along a first direction and electrically connected, and the second sub-electrodes comprise a plurality of second diamond-shaped conductive blocks which are adjacent to each other along a second direction and electrically connected.
8. The display panel according to claim 7, wherein:
the auxiliary electrode extends along a first direction;
the auxiliary electrode is strip-shaped, or the auxiliary electrode comprises a plurality of third diamond-shaped conductive blocks, and the third diamond-shaped conductive blocks adjacent to each other along the first direction are electrically connected.
9. A display device characterized by comprising the display panel according to any one of claims 1 to 8.
10. A method for manufacturing a display panel is characterized by comprising the following steps:
providing a substrate;
providing a plurality of light emitting structures and a plurality of auxiliary electrodes on the substrate; the light-emitting structure comprises a light-emitting functional layer and a first electrode, wherein the first electrode is arranged on one side, far away from the substrate, of the light-emitting functional layer; the auxiliary electrode and the first electrode are arranged on the same layer, the auxiliary electrode is arranged in a fingerprint identification area of the display panel, and the auxiliary electrode and the first electrode are insulated from each other;
setting a fingerprint identification layer; the fingerprint identification layer is arranged on one side, far away from the substrate, of the first electrode, and the fingerprint identification layer is located in a fingerprint identification area of the display panel; the fingerprint identification layer comprises a fingerprint identification electrode; the fingerprint identification electrode and the first electrode are insulated from each other, and the vertical projection of the auxiliary electrode on the substrate and the vertical projection of the fingerprint identification electrode on the substrate at least partially overlap.
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| CN115100962A (en) * | 2022-06-28 | 2022-09-23 | 云谷（固安）科技有限公司 | Display panel and display device |
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| CN107168586A (en) * | 2017-07-11 | 2017-09-15 | 上海天马微电子有限公司 | A kind of display panel and display device |
| CN107425041A (en) * | 2017-07-27 | 2017-12-01 | 上海天马微电子有限公司 | A kind of touch-control display panel, device and preparation method |
| CN209373565U (en) * | 2019-03-06 | 2019-09-10 | 上海和辉光电有限公司 | A kind of display panel and display device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115100962A (en) * | 2022-06-28 | 2022-09-23 | 云谷（固安）科技有限公司 | Display panel and display device |
| CN115100962B (en) * | 2022-06-28 | 2024-05-17 | 云谷（固安）科技有限公司 | Display panel and display device |
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| Publication number | Publication date |
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| CN112069935B (en) | 2022-07-26 |
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