CN112186013B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN112186013B CN112186013B CN202011021244.XA CN202011021244A CN112186013B CN 112186013 B CN112186013 B CN 112186013B CN 202011021244 A CN202011021244 A CN 202011021244A CN 112186013 B CN112186013 B CN 112186013B
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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
-
- 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
- G06V10/145—Illumination specially adapted for pattern recognition, e.g. using gratings
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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
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/14—Carrier transporting layers
- H10K50/16—Electron transporting layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/82—Cathodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/82—Cathodes
- H10K50/822—Cathodes characterised by their shape
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- Optics & Photonics (AREA)
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- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The application relates to a display panel and a display device, wherein the display panel comprises a fingerprint identification area; the fingerprint identification area comprises a plurality of fingerprint identification modules; each fingerprint identification module is clamped between pixel points in the fingerprint identification area; the electron transmission layer and the cathode layer in the fingerprint identification area are provided with windows at the positions opposite to the fingerprint identification module; the window is used for fingerprint identification module to receive the light of pointing the reflection, and this application lets fingerprint identification module can receive the light of pointing the reflection through this window through seting up the window on electron transport layer and cathode layer, has avoided electron transport layer and cathode layer to the effect of blockking of light among the conventional art, has improved fingerprint identification module received light intensity to improve fingerprint identification module identification fingerprint's sensitivity and accuracy.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
In recent years, the OLED (Organic Light-Emitting Diode) display technology has been widely used due to its advantages of self-luminescence, high contrast, thin thickness, wide viewing angle, fast response speed, etc., and the display panel has been more and more powerful in function, for example, fingerprint unlocking of the display panel has been achieved at present.
In the conventional art, place fingerprint identification module in organic luminescent layer department, thereby avoided carrying out the trompil at electronic equipment's front or back independent area to it and set up fingerprint identification module, the wholeness and the screen that have improved electronic equipment account for, the light that is reflected back by the finger that fingerprint identification module reflects through receiving light emitting module, thereby carry out fingerprint identification, but, the light that reflects back in the fingerprint identification in-process can receive the blockking of other retes above the luminescent layer, the identification ability is relatively weak. Therefore, in the implementation process, the inventor finds that at least the following problems exist in the conventional technology: the traditional display panel has poor fingerprint identification performance and is insensitive.
Disclosure of Invention
Accordingly, it is desirable to provide a display panel and a display device, which are capable of solving the problems of poor fingerprint recognition performance and insensitivity of the conventional display panel.
In order to achieve the above object, in one aspect, an embodiment of the present application provides a display panel, including a fingerprint identification area;
the fingerprint identification area comprises a plurality of fingerprint identification modules; each fingerprint identification module is clamped between pixel points in the fingerprint identification area;
the electron transmission layer and the cathode layer in the fingerprint identification area are provided with windows at the positions opposite to the fingerprint identification module; the window is used for the fingerprint identification module to receive the light reflected by the finger.
In one embodiment, a fingerprint identification module is arranged between adjacent pixel points in the fingerprint identification area.
In one embodiment, the area of the fingerprint identification region is smaller than the area of the display region of the display panel.
In one embodiment, the fingerprint identification area is arranged at the edge of the display area.
In one embodiment, the area of the fingerprint identification region is equal to the area of the display region of the display panel.
In one embodiment, the device further comprises a capping layer;
the capping layer covers the electron transport layer and the cathode layer and fills the window.
In one embodiment, the packaging structure further comprises a packaging cover plate;
the packaging cover plate covers the sealing cover layer.
In one embodiment, the device further comprises a hole injection layer and a hole transport layer;
the hole transport layer covers the hole injection layer; and pixel points and a fingerprint identification module are formed on the hole transmission layer.
In one embodiment, the device further comprises a pixel anode;
the hole injection layer covers the pixel anode.
On the other hand, the embodiment of the application also provides a display device, which comprises the display panel.
One of the above technical solutions has the following advantages and beneficial effects:
the display panel provided by the embodiments of the present application includes a fingerprint identification area; the fingerprint identification area comprises a plurality of fingerprint identification modules; each fingerprint identification module is clamped between pixel points in the fingerprint identification area; the electron transmission layer and the cathode layer in the fingerprint identification area are provided with windows at the positions opposite to the fingerprint identification module; the window is used for fingerprint identification module to receive the light of finger reflection, and this application lets fingerprint identification module can receive the light of finger reflection through this window through seting up the window on electron transport layer and cathode layer, has avoided electron transport layer and cathode layer to the effect of blockking light among the conventional art, has improved fingerprint identification module received light intensity to improve the sensitivity and the accuracy of fingerprint identification module discernment fingerprint.
Drawings
FIG. 1 is a diagram illustrating a first structure of a display panel according to an embodiment;
FIG. 2 is a second schematic diagram of an embodiment of a display panel;
FIG. 3 is a diagram illustrating a third structure of a display panel in an embodiment;
fig. 4 is a fourth structural diagram of the display panel in an embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "sandwiched", "one end", "the other end" and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In order to solve the problems of poor fingerprint identification performance and insensitivity of the conventional display panel, in one embodiment, as shown in fig. 1, a display panel is provided, which comprises a fingerprint identification area 1;
the fingerprint identification area 1 comprises a plurality of fingerprint identification modules 11; each fingerprint identification module 11 is clamped between pixel points 13 in the fingerprint identification area 1;
the electron transmission layer 15 and the cathode layer 17 in the fingerprint identification area 1 are provided with a window 19 at the position opposite to the fingerprint identification module 11; the window 19 is used for the fingerprint identification module 11 to receive the light reflected by the finger.
It should be noted that the fingerprint identification area is a module for fingerprint identification on the display panel, specifically, the fingerprint identification module is arranged in the fingerprint identification area, and the fingerprint identification module can receive light rays emitted by the display panel reflected by a finger in the state that the display panel is bright, so as to identify the fingerprint.
The fingerprint identification modules are dispersedly distributed among the pixel points in the fingerprint identification area, and the quantity and the distribution density of the fingerprint identification modules can be determined according to actual needs. In one example, adjacent fingerprinting modules are separated by three pixels. In another example, adjacent fingerprinting modules are separated by two pixels. In another example, a fingerprint identification module is disposed between adjacent pixels in the fingerprint identification area.
In order to enable the fingerprint identification module to better receive light reflected by a finger, windows are arranged on the electronic transmission layer and the cathode layer in the fingerprint identification area, the windows are right opposite to the fingerprint identification module, namely the fingerprint identification module is right opposite to the electronic transmission layer and the cathode layer to cover for hollow processing, and in the preparation process, the electronic transmission layer and the cathode layer with the windows in the fingerprint identification area are prepared by utilizing a mask net.
The electron transport layer can be made of, but is not limited to, the following materials: alq3, almq3, DVPBi, TAZ, OXD, PBD, BND, and PV.
The cathode layer is made of, but not limited to, the following materials: ag. Al, li, mg, ca and In. In particular, a deposition process may be used to form the electron cathode layer.
In the preparation process, a deposition process can be adopted to form the electron transport layer and the cathode layer, wherein the deposition process can be any one of the following processes: chemical Vapor Deposition (CVD), physical Vapor Deposition (PVD), atomic Layer Deposition (ALD), low Pressure Chemical Vapor Deposition (LPCVD), laser Ablation Deposition (LAD), and Selective Epitaxial Growth (SEG).
The area size of the fingerprint identification area is a factor that affects the identification accuracy and the manufacturing cost, and the setting position of the fingerprint identification area affects the convenience of use. In one example, the area of the fingerprint identification region is smaller than the area of the display region of the display panel. In this example, the area of the fingerprint identification area is small, which can save the manufacturing cost of the panel, for example, the area of the fingerprint identification area is the average value of the collected finger areas, thereby ensuring normal unlocking and reducing the manufacturing cost of the display panel to the maximum. To facilitate the unlocking, in one example, the fingerprint identification area is disposed at an edge of the display area, for example, the fingerprint identification area is disposed at a lower right side in a state where the user normally uses the display panel, or the fingerprint identification area is disposed at a lower left side in a state where the user normally uses the display panel, and the fingerprint identification area is disposed at a lower edge in a state where the user normally uses the display panel.
Further, in the above example, the shape of the fingerprint identification area may be determined according to actual requirements, for example, a circle, an ellipse, a finger shape, and the like.
In another example, the area of the fingerprint identification area is equal to the area of the display panel, that is, the whole display panel can be used for fingerprint unlocking, so that the convenience degree of fingerprint unlocking is greatly improved.
In one embodiment, as shown in FIG. 2, further comprises a capping layer 21; a capping layer 21 overlies the electron transport layer 15 and the cathode layer 17 and fills the window 19. The capping layer is used for simulating a surface plasmon phenomenon, and the capping layer is an organic film layer.
In one embodiment, as shown in fig. 3, further comprises a package cover plate 23; a package cover 23 is on the capping layer 21. It should be noted that the package cover plate is used for packaging the display panel, and the package cover plate may be made of tempered glass.
In one embodiment, as shown in fig. 4, further comprises a hole injection layer 25 and a hole transport layer 27; a hole transport layer 27 overlying the hole injection layer 25; the hole transport layer 27 has pixel points 13 and a fingerprint recognition module 11 formed thereon. The hole injection layer and the hole transport layer may be formed by a deposition process, and the hole injection layer may be made of, but not limited to, the following materials: polyester carbonate, titanyl phthalocyanine, m-MTDATA, and 2-TNATA, the hole transport layer may be made using, but not limited to, the following materials: TPD, NPB, PVK, spiro-TPD and Spiro-NPB. Specifically, the hole injection layer and the hole transport layer may be formed using a deposition process.
In one embodiment, as shown in fig. 4, further comprises a pixel anode 29; the hole injection layer 25 covers the pixel anode 29. The pixel anode can be formed by adopting a deposition process, and the material of the pixel anode is TIO/Ag/TIO.
In the embodiments of the present application where the display panel includes a fingerprint identification area; the fingerprint identification area comprises a plurality of fingerprint identification modules; each fingerprint identification module is clamped between pixel points in the fingerprint identification area; a window is arranged at the position, opposite to the fingerprint identification module, of the electron transmission layer and the cathode layer in the fingerprint identification area; the window is used for fingerprint identification module to receive the light of finger reflection, and this application lets fingerprint identification module can receive the light of finger reflection through this window through seting up the window on electron transport layer and cathode layer, has avoided electron transport layer and cathode layer to the effect of blockking light among the conventional art, has improved fingerprint identification module received light intensity to improve the sensitivity and the accuracy of fingerprint identification module discernment fingerprint.
In one embodiment, there is also provided a display device including a display panel.
It should be noted that the display panel includes a fingerprint identification area;
the fingerprint identification area comprises a plurality of fingerprint identification modules; each fingerprint identification module is clamped between pixel points in the fingerprint identification area;
the electron transmission layer and the cathode layer in the fingerprint identification area are provided with windows at the positions opposite to the fingerprint identification module; the window is used for the fingerprint identification module to receive the light reflected by the finger.
It should be noted that the fingerprint identification area is a module used for fingerprint identification on the display panel, specifically, the fingerprint identification module is arranged in the fingerprint identification area, and the fingerprint identification module can receive light rays emitted by the display panel reflected by a finger in a bright screen state of the display panel, so as to identify a fingerprint.
The fingerprint identification modules are dispersedly distributed among the pixel points in the fingerprint identification area, and the quantity and the distribution density of the fingerprint identification modules can be determined according to actual needs. In one example, adjacent fingerprinting modules are separated by three pixels. In another example, two pixels are spaced between adjacent fingerprinting modules. In another example, a fingerprint identification module is disposed between adjacent pixels in the fingerprint identification area.
In order to enable the fingerprint identification module to better receive light reflected by a finger, windows are arranged on the electronic transmission layer and the cathode layer in the fingerprint identification area, the windows are right opposite to the fingerprint identification module, namely the fingerprint identification module is right opposite to the electronic transmission layer and the cathode layer to cover for hollow processing, and in the preparation process, the electronic transmission layer and the cathode layer with the windows in the fingerprint identification area are prepared by utilizing a mask net.
The electron transport layer can be made of, but is not limited to, the following materials: alq3, almq3, DVPBi, TAZ, OXD, PBD, BND, and PV.
The cathode layer is made of, but not limited to, the following materials: ag. Al, li, mg, ca and In. In particular, the electron cathode layer may be formed using a deposition process.
In the preparation process, a deposition process can be adopted to form the electron transport layer and the cathode layer, wherein the deposition process can be any one of the following processes: chemical Vapor Deposition (CVD), physical Vapor Deposition (PVD), atomic Layer Deposition (ALD), low Pressure Chemical Vapor Deposition (LPCVD), laser Ablation Deposition (LAD), and Selective Epitaxial Growth (SEG).
The area size of the fingerprint identification area is a factor that affects the identification accuracy and the manufacturing cost, and the setting position of the fingerprint identification area affects the convenience of use. In one example, the area of the fingerprint identification region is smaller than the area of the display region of the display panel. In this example, the area of the fingerprint identification area is small, which can save the manufacturing cost of the panel, for example, the area of the fingerprint identification area is the average value of the collected finger areas, thereby ensuring normal unlocking and reducing the manufacturing cost of the display panel to the maximum. To facilitate the unlocking, in one example, the fingerprint identification area is disposed at an edge of the display area, for example, the fingerprint identification area is disposed at a lower right side in a state where the user normally uses the display panel, or the fingerprint identification area is disposed at a lower left side in a state where the user normally uses the display panel, and the fingerprint identification area is disposed at a lower edge in a state where the user normally uses the display panel.
Further, in the above example, the shape of the fingerprint identification area may be determined according to actual requirements, for example, a circle, an ellipse, a finger shape, and the like.
In another example, the area of the fingerprint identification area is equal to the area of the display panel, that is, the whole display panel can be used for fingerprint unlocking, so that the convenience degree of fingerprint unlocking is greatly improved.
In one embodiment, a capping layer is also included; the capping layer covers the electron transport layer and the cathode layer and fills the window. The capping layer is used for simulating a surface plasmon phenomenon, and the capping layer is an organic film layer.
In one embodiment, further comprising a package cover plate; the packaging cover plate covers the sealing cover layer. It should be noted that the encapsulation cover plate is used for encapsulating the display panel, and the encapsulation cover plate may be tempered glass.
In one embodiment, a hole injection layer and a hole transport layer are also included; the hole transport layer covers the hole injection layer; and pixel points and a fingerprint identification module are formed on the hole transmission layer. The hole injection layer and the hole transport layer may be formed by a deposition process, and the hole injection layer may be made of, but not limited to, the following materials: polyester carbonate, titanyl phthalocyanine, m-MTDATA, and 2-TNATA, the hole transport layer may be made using, but not limited to, the following materials: TPD, NPB, PVK, spiro-TPD and Spiro-NPB. Specifically, the hole injection layer and the hole transport layer may be formed using a deposition process.
In one embodiment, further comprising a pixel anode; the hole injection layer covers the pixel anode. The pixel anode can be formed by adopting a deposition process, and the material of the pixel anode is TIO/Ag/TIO.
In each embodiment of this application display device, set up the window on electron transport layer and cathode layer, let fingerprint identification module can receive the light of finger reflection through this window, avoided electron transport layer and cathode layer to the effect of blockking of light among the conventional art, improved fingerprint identification module received light intensity to improve the sensitivity and the accuracy of fingerprint identification module identification fingerprint, make display device fingerprint identification fast, sensitivity is high, the accuracy is high.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent application shall be subject to the appended claims.
Claims (7)
1. A display panel, comprising a fingerprint identification area;
the fingerprint identification area comprises a plurality of fingerprint identification modules; each fingerprint identification module is clamped between pixel points in the fingerprint identification area;
the electron transmission layer and the cathode layer in the fingerprint identification area are provided with windows at positions opposite to the fingerprint identification module; the window is used for the fingerprint identification module to receive light reflected by the finger; the electron transmission layer and the cathode layer are prepared by adopting a mask net;
the display panel further comprises a sealing layer;
the sealing layer covers the electron transmission layer and the cathode layer and fills the window;
the display panel further comprises a packaging cover plate;
the packaging cover plate covers the sealing cover layer;
the display panel further comprises a hole injection layer and a hole transport layer, wherein the hole injection layer and the hole transport layer are formed by adopting a deposition process;
the hole transport layer covers the hole injection layer; the pixel points and the fingerprint identification module are formed on the hole transmission layer.
2. The display panel of claim 1, wherein one of the fingerprint recognition modules is disposed between adjacent pixels in the fingerprint recognition area.
3. The display panel according to claim 1, wherein an area of the fingerprint identification region is smaller than an area of a display region of the display panel.
4. The display panel according to claim 3, wherein the fingerprint identification area is provided at an edge of the display area.
5. The display panel according to claim 1, wherein an area of the fingerprint identification region is equal to an area of a display region of the display panel.
6. The display panel according to claim 1, further comprising a pixel anode;
the hole injection layer covers the pixel anode.
7. A display device characterized by comprising the display panel according to any one of claims 1 to 6.
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| CN202011021244.XA CN112186013B (en) | 2020-09-25 | 2020-09-25 | Display panel and display device |
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| CN202011021244.XA CN112186013B (en) | 2020-09-25 | 2020-09-25 | Display panel and display device |
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| CN112186013B true CN112186013B (en) | 2023-04-07 |
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