CN113555411A - Display panel and display device - Google Patents
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- CN113555411A CN113555411A CN202110865731.2A CN202110865731A CN113555411A CN 113555411 A CN113555411 A CN 113555411A CN 202110865731 A CN202110865731 A CN 202110865731A CN 113555411 A CN113555411 A CN 113555411A
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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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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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Abstract
The application discloses display panel and display device, display panel includes first display area and second display area, display panel includes array substrate and light emitting component layer, the light emitting component layer set up in one side of array substrate, the light emitting component layer is including being located the first light emitting part of first display area, first light emitting part includes first pixel and limits layer and a plurality of luminescence unit, the luminescence unit is including forming in first electrode on the array substrate, first pixel is limited the layer and is included a plurality of pixel and limits the unit, every pixel is limited the unit and is included a pixel opening, the luminescence unit set up in the pixel opening, pixel is limited the unit and is covered the edge of first electrode, pixel is limited the light transmittance of unit by pixel opening has the stair-step change to self peripheral direction. The display panel improves the diffraction phenomenon of the first display area, so that the imaging effect of the camera module positioned below the display panel is better.
Description
Technical Field
The application belongs to the technical field of electronic products, and particularly relates to a display panel and a display device.
Background
With the development of display technology, full-screen display has become a development trend of electronic devices such as mobile phones and the like, and in order to realize full-screen display, an off-screen camera technology is developed and developed, but diffraction phenomena exist in the electronic devices adopting the off-screen camera technology, the diffraction phenomena become key factors restricting the development of the off-screen camera technology, and the diffraction phenomena can influence the imaging quality of the cameras in the display devices.
Disclosure of Invention
The embodiment of the application provides a display panel and a display device, and the display panel improves the diffraction phenomenon of a first display area, so that the imaging effect of a camera module positioned under the display panel is better.
An aspect of an embodiment of the present application provides a display panel, including a first display area and a second display area at least partially surrounding the first display area, the display panel including:
an array substrate;
the light-emitting element layer is arranged on one side of the array substrate and comprises a first light-emitting part located in the first display area, the first light-emitting part comprises a first pixel defining layer and a plurality of light-emitting units, the light-emitting units comprise first electrodes formed on the array substrate, the first pixel defining layer comprises a plurality of pixel defining units, each pixel defining unit comprises a pixel opening, the light-emitting units are arranged on the pixel openings, the pixel defining units cover the edges of the first electrodes, and the light transmittance of the pixel defining units is in a stepped change from the pixel openings to the peripheral direction of the pixel defining units.
According to the first aspect of the present application, the thickness of the pixel defining unit of the first pixel defining layer has a stepwise variation from the pixel opening to the peripheral edge thereof in the thickness direction of the display panel;
preferably, the thickness of the pixel defining unit gradually increases from the pixel opening edge to a direction away from the edge and gradually decreases toward the peripheral edge.
According to the first aspect of the present application, a cross section of the pixel defining unit in the thickness direction includes an arc-shaped edge on a side of the pixel defining layer facing away from the array substrate.
According to a first aspect of the application, the arc-shaped edge is parabolic, half sine-shaped or half cosine-shaped.
According to the first aspect of the present application, a cross section of the pixel defining unit in the thickness direction includes a dog-legged edge on a side of the pixel defining layer facing away from the array substrate.
According to the first aspect of the present application, a cross section of the pixel defining unit in the thickness direction includes edges where straight lines and curved lines are alternately distributed, and the edges where the straight lines and the curved lines are alternately distributed are located on a side of the pixel defining layer facing away from the array substrate.
According to the first aspect of the present application, the pixel defining unit includes a plurality of annular partitions that are circumferentially arranged from the pixel opening to the outer periphery thereof, and the annular partitions have the same thickness in the thickness direction of the display panel and have different light transmittances.
According to the first aspect of the present application, the pixel defining unit is made of black organic glue.
According to the first aspect of the present application, in the orthographic projection of the pixel defining unit on the array substrate, the minimum distance between the edge facing the pixel opening and the peripheral edge facing away from the pixel opening is 2.5um to 3 um.
In another aspect, the present application provides a display device including any one of the display panels provided in the first aspect of the present application.
In the display panel that this application embodiment provided, be located the first luminescence portion of first display area, each pixel is injectd the unit and is used for prescribing a limit to the luminescence unit on the one hand, on the other hand, because each pixel is injectd the edge of the first electrode of unit cover in the luminescence unit, and the luminousness of each pixel injectd the unit has the ladder nature change by pixel opening to self peripheral direction, the luminousness of pixel injectd the unit is satisfied predetermineeing the functional relation by pixel opening to self peripheral direction, in order to destroy diffraction energy level and disturb diffraction production condition, and then reduce the outside light and produce diffraction phenomenon through first display area, make the light that the camera module that is located first display area and deviates from display panel light-emitting surface one side received more do benefit to formation of image, and then promote the imaging quality of camera module.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;
FIG. 2 is a schematic cross-sectional view taken along A-A of FIG. 1;
fig. 3 is an exemplary enlarged view of the pixel defining unit of fig. 2;
FIG. 4 is another schematic cross-sectional view taken along A-A of FIG. 1;
fig. 5 is an exemplary enlarged view of the pixel defining unit of fig. 4;
FIG. 6 is a further schematic cross-sectional view taken along A-A of FIG. 1;
fig. 7 is an exemplary enlarged view of the pixel defining unit of fig. 6;
FIG. 8 is a further schematic cross-sectional view taken along A-A of FIG. 1;
fig. 9 is an exemplary enlarged view of the pixel defining unit of fig. 8;
FIG. 10 is another schematic cross-sectional view taken along A-A of FIG. 1;
fig. 11 is an exemplary enlarged view of the pixel defining unit of fig. 10;
fig. 12 is a schematic structural diagram of a display device according to an embodiment of the present application.
In the drawings:
1-a display panel; 10-an array substrate; 101-a substrate; 102-a driver circuit layer;
11-a light emitting element layer; 111-a first electrode; 112-pixel defining unit; 1121-pixel openings; 1122-first partition; 1123 — a second partition; 1124-third partition; 113-a second pixel defining layer; 1131-opening; 114-a layer of light emitting material; 115-a second electrode;
2-a display device;
3-black foam layer; 31-a light-transmitting hole;
4-photosensitive module.
Detailed Description
Features and exemplary embodiments of various aspects of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The inventor finds that diffraction phenomenon exists in the electronic equipment adopting the under-screen camera technology, and the reason is as follows: the display device comprises a display panel, the display panel comprises an array substrate and a light-emitting element layer formed on the array substrate, the periodic pattern of an electrode and a pixel limiting layer in the light-emitting element layer is a cause of diffraction phenomenon, so that when external light passes through the part of the structure with the periodic pattern, the diffraction phenomenon is generated, the acquisition of light by a camera module is influenced, and the imaging quality is seriously influenced.
For better understanding of the present application, a display panel and a display device according to an embodiment of the present application will be described in detail below with reference to fig. 1 to 12.
Referring to fig. 1 to 2, an embodiment of the present invention provides a display panel 1, including a first display area AA1 and a second display area AA2 at least partially surrounding the first display area AA1, where the display panel 1 includes an array substrate 10 and a light emitting device layer 11, a light transmittance of the first display area AA1 is greater than a light transmittance of the second display area AA2, and in the under-screen camera technology, a camera module is disposed on a side of the display panel 1 facing away from a light-emitting surface and opposite to the first display area AA1, so that the camera module can obtain light to form an image, and when the photosensitive module 4 is a module for implementing other functions (e.g., a fingerprint identification module for fingerprint identification, etc.), the photosensitive module is also disposed on a side of the display panel 1 facing away from the light-emitting surface and opposite to the first display area AA1, so as to obtain light.
The array substrate 10 includes a substrate 101 and a driving circuit layer 102 formed on the substrate 101, where the driving circuit layer 102 includes devices such as transistors and capacitors, and also includes various metal traces and organic layers and inorganic layers for insulation or planarization, and the substrate 101 may be a single-layer structure, and specifically, the substrate 101 may be a rigid substrate 101 such as a glass layer, and may also be a flexible substrate 101 such as a Polyimide (PI) layer. The substrate 101 may also be a composite layer, specifically may include multiple layers arranged in a stacked manner, and the material of each layer may be an organic layer such as a PI layer, or may also be an inorganic layer such as a silicon oxide (SiO) layer or a silicon nitride (SiN) layer; the metal wirings include data signal lines, power signal lines, reset signal lines, light emission control signal lines, scan signal lines, and the like.
As shown in fig. 2, the light emitting element layer 11 is disposed on one side of the array substrate 10, the light emitting element layer includes a first light emitting portion located in the first display area AA1, the first light emitting portion includes a first pixel defining layer and a plurality of light emitting units, the light emitting units include a first electrode 111 formed on the array substrate 10, the first pixel defining layer includes a plurality of pixel defining units 112, each pixel defining unit 112 includes a pixel opening 1121, the light emitting units are disposed in the pixel openings 1121, the pixel defining units 112 cover edges of the first electrode 111, and light transmittance of the pixel defining units 112 has a stepwise change from the pixel openings 1121 to a self-peripheral direction.
In the above-mentioned display panel 1 provided by the application, be located the first luminescence portion of first display area AA1, each pixel is injectd unit 112 and is used for prescribing a limit to the luminescence unit on the one hand, on the other hand, because each pixel is injectd the edge that unit 112 covers first electrode 111 in the luminescence unit, and the luminousness of each pixel is injectd unit 112 and has the echelonment change by pixel opening 1121 to self peripheral direction, the luminousness of pixel is injectd unit 112 and is satisfied predetermined functional relation by pixel opening 1121 to self peripheral direction, in order to destroy diffraction energy level and disturb diffraction production condition, and then reduce the diffraction phenomenon that produces when external light passes through first display area, make the light that is received by the camera module that is located first display area AA1 and deviates from display panel 1 light-emitting surface one side more do benefit to formation of image, and then promote the imaging quality of camera module.
As shown in fig. 2, the light emitting element layer 11 further includes a second light emitting portion located in the second display area AA2, the second light emitting portion includes a second pixel defining layer 113 and a plurality of light emitting cells, the second pixel defining layer 113 is disposed in the same layer as the first pixel defining layer, the second pixel defining layer 113 includes a plurality of openings 1131 corresponding to the light emitting cells one to one, and a connection portion located between the openings 1131, the light emitting cells are disposed in the openings 1131, the light emitting cells include the first electrodes 111, the second pixel defining layer 113 covers edges of the respective first electrodes 111, a cross section of the respective openings 1131 of the second pixel defining layer 113 along a direction perpendicular to the array substrate 10 may be a trapezoid, an irregular pattern, or the like, and the present application is not particularly limited.
As shown in fig. 2, the light emitting unit includes a first electrode 111 formed on the array substrate 10, a light emitting material layer 114 formed on a side of the first electrode 111 facing away from the array substrate 10, and a second electrode 115 formed on a side of the light emitting material layer 114 facing away from the first electrode 111, the first electrode 111 may be an opaque anode, silver (Ag) and ITO are selected to be stacked, and the second electrode 115 is a cathode; the light emitting material layer 114 includes a part or all of an Electron Injection Layer (EIL), an Electron Transport Layer (ETL), a Hole Blocking Layer (HBL), an Electron Blocking Layer (EBL), a Hole Transport Layer (HTL), and a Hole Injection Layer (HIL), the light emitting material layer 114 and the second electrode 115 layer are disposed in the entire surface of the display panel 1, that is, a portion sunk in the pixel opening 1121 of the first display area AA1, a portion formed at a side of the first pixel defining layer facing away from the array substrate 10, and a portion between the first pixel defining layers (i.e., a portion directly formed on the array substrate 10), a portion at a side of the second pixel defining layer facing away from the array substrate 10, and a portion sunk in the opening, the light emitting material layer 114 is immersed in the opening and the pixel opening 1121, and a portion facing the array substrate 10 is in direct contact with the first electrode 111.
In one possible embodiment, as shown in fig. 2 to 9, the thickness of the pixel defining unit 112 of the first pixel defining layer has a stepwise variation from the pixel opening 1121 to the peripheral edge thereof in the thickness direction of the display panel;
in one possible embodiment, the thickness of the pixel defining unit 112 gradually increases from the edge of the pixel opening 1121 to a direction away from the edge and gradually decreases toward the peripheral edge.
In the above embodiment, the pixel defining unit 112 is made of the same material, and the larger the thickness of the pixel defining unit 112 is, the smaller the light transmittance is, so that the light transmittance of each portion can be changed by changing the thickness of each portion of the pixel defining unit 112, and the light transmittance of the pixel defining unit 112 has a step change from the pixel opening 1121 to the peripheral direction thereof, thereby improving the diffraction phenomenon generated when external light passes through the first display area AA1, making light received by the camera module located on the side of the first display area AA1 departing from the light emitting surface of the display panel 1 more favorable for imaging, and further improving the imaging quality of the camera module.
In a possible implementation manner, as shown in fig. 2 to 7, a cross section of the pixel defining unit 112 along the thickness direction includes an arc-shaped edge, the arc-shaped edge is located on a side of the pixel defining layer away from the array substrate 10, so that a smooth transition is realized between the thickness of the pixel defining unit 112 and the outer peripheral direction of the pixel defining unit, each thickness corresponds to one transmittance value, and the transmittance values corresponding to the thicknesses realize a step change, so that the transmittance of the pixel defining unit 112 satisfies a preset functional relationship between the pixel opening 1121 and the outer peripheral direction of the pixel defining unit, so as to destroy a diffraction-level disturbing diffraction generating condition, so that a diffraction phenomenon of the first display area AA1 is improved, and further, an imaging effect of the camera module is better.
Specifically, as shown in fig. 2 and 3, the arc-shaped edge in the above embodiment has a parabolic shape; (ii) a Alternatively, as shown in fig. 4 and 5, the arc-shaped edge is half sine-shaped; alternatively, as shown in fig. 6 and 7, the shape edge is in a half cosine shape, and it is understood that the shape of the arc is not limited to the above conventional change, but may be an irregular change curve, and the present application is not particularly limited.
In another possible implementation manner, as shown in fig. 8 and 9, a cross section of the pixel defining unit 112 along the thickness direction includes a zigzag edge, the zigzag edge is located on a side of the pixel defining layer away from the array substrate, and the first pixel defining layer is conveniently manufactured by adopting a design of the zigzag edge, each thickness in the pixel defining unit 112 corresponds to one transmittance value, and the transmittance values corresponding to the thicknesses realize a step change, so that the transmittance of the pixel defining unit 112 from the pixel opening 1121 to the peripheral direction thereof satisfies a preset functional relationship, so as to destroy a diffraction energy level disturbance diffraction generating condition, so that a diffraction phenomenon of the first display area AA1 is improved, and further, an imaging effect of the camera module is better.
Specifically, in the above embodiment, in the cross section of the pixel defining unit 112 in the thickness direction, at least two straight lines are included from the pixel opening 1121 to one side edge of the portion facing away from the array substrate 10 in the peripheral direction thereof, as shown in fig. 8 and 9, wherein a first end of one straight line is located on the first electrode 111, a second end of the one straight line intersects with a first end of another straight line, and a second end of the other straight line is located on the array substrate 10; when the cross section of the pixel defining unit 112 along the thickness direction includes a plurality of (more than two) straight lines from the pixel opening 1121 to a side edge of the peripheral direction portion thereof away from the array substrate 10, the light transmittance of the pixel defining unit 112 is changed more abundantly, so as to further reduce the probability of generating the diffraction phenomenon, and the imaging quality of the photosensitive module 4 located on the side of the first display area AA1 away from the light emitting surface of the display panel 1 is better.
In another possible implementation manner, the cross section of the pixel defining unit 112 along the thickness direction includes edges where straight lines and curved lines are distributed in an interlaced manner, and the edges where the straight lines and the curved lines are distributed in the interlaced manner are located on one side of the pixel defining layer away from the array substrate, that is, the edges from the pixel opening 1121 to one side of the peripheral direction portion away from the array substrate 10 are distributed in an interlaced manner as straight lines and curved lines, so that the light transmittance of the pixel defining unit 112 has a step change from the pixel opening 1121 to the peripheral direction portion thereof, so as to improve the diffraction phenomenon generated when the external light passes through the first display area AA1, and the light received by the photosensitive module 4 located on one side of the first display area AA1 away from the light emitting surface of the display panel 1 is more favorable for imaging, thereby improving the imaging quality.
In another possible embodiment, as shown in fig. 10 and 11, the pixel defining unit 112 includes a plurality of annular partitions disposed around the pixel opening 1121 in the peripheral direction thereof, and the annular partitions have the same thickness and different light transmittances in the thickness direction of the display panel.
In the above embodiment, each pixel defining unit 112 includes a plurality of annular partitions that are sequentially nested, as shown in fig. 11, each pixel defining unit 112 includes a first annular partition 1122, a second annular partition 1123, and a third annular partition 1124, and each annular partition is made of a material with a different light transmittance at the same thickness, so that the light transmittance of the pixel defining unit 112 has a step change from the pixel opening 1121 to the peripheral direction thereof, so as to improve a diffraction phenomenon generated when external light passes through the first display area AA1, so that light received by the photosensitive module 4 located on a side of the first display area AA1 away from the light-emitting surface of the display panel 1 is more beneficial to imaging, and further, the imaging quality is improved.
In the above embodiment, the number of the annular partitions may be three or more, the thicknesses of the annular partitions are the same, the transmittances are different, and the transmittance variation trend of each annular partition may be: the size of the pixel opening 1121 is increased first and then decreased in the direction from the pixel opening 1121 to the outer periphery thereof, or the size of the pixel opening 1121 is decreased first and then increased in the direction from the pixel opening 1121 to the outer periphery thereof, or the size of the pixel opening 1121 to the outer periphery thereof is gradually increased or decreased, which is not particularly limited in the present application.
In a possible embodiment, the material of the pixel defining unit 112 is a black organic glue, and specifically, the black organic glue with a light transmittance of 30% at a thickness of 1.5 μm, the black organic glue with a light transmittance of 60% at a thickness of 1.5 μm, the black organic glue with a light transmittance of 90% at a thickness of 1.5 μm, and the like can be selected and are not particularly limited in this application.
In one possible embodiment, in the orthographic projection of the pixel defining unit 112 on the array substrate 10, the minimum distance between the side facing the pixel opening 1121 and the side facing away from the pixel opening 1121 is 2.5um to 3um, so that the step distribution of the light transmittance of the pixel defining unit 112 itself can be realized while the definition of the light emitting unit is realized, and the mutual interference between the adjacent pixel defining units 112 is prevented.
Please refer to fig. 12, an embodiment of the present application provides a display device 2, including a display panel 1, further including a photosensitive module 4 disposed on one side of the light emitting surface of the display panel 1, the photosensitive module 4 may be a camera module, etc., the one side of the light emitting surface of the display panel 1 is further provided with a black foam layer 3, a region of the black foam layer 3 opposite to the photosensitive module 4 is provided with a light hole 31, so that external light enters the photosensitive module through the display panel and the light hole 31, thereby the photosensitive module 4 is integrated below the display panel 1 and can normally work, when the photosensitive module 4 is the camera module, the under-screen camera technology can be implemented, and the present application uses the photosensitive module 4 as the camera module for illustration.
Specifically, the display device 2 may be an electronic device such as a mobile phone, a tablet computer, a wearable device, a display, and the like, and the application is not particularly limited.
As will be apparent to those skilled in the art, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present application, and these modifications or substitutions should be covered within the scope of the present application.
It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
Claims (10)
1. A display panel comprising a first display region and a second display region at least partially surrounding the first display region, the display panel comprising:
an array substrate;
the light-emitting element layer is arranged on one side of the array substrate and comprises a first light-emitting part located in the first display area, the first light-emitting part comprises a first pixel defining layer and a plurality of light-emitting units, the light-emitting units comprise first electrodes formed on the array substrate, the first pixel defining layer comprises a plurality of pixel defining units, each pixel defining unit comprises a pixel opening, the light-emitting units are arranged on the pixel openings, the pixel defining units cover the edges of the first electrodes, and the light transmittance of the pixel defining units is in a stepped change from the pixel openings to the peripheral direction of the pixel defining units.
2. The display panel according to claim 1, wherein the thickness of the pixel defining unit of the first pixel defining layer has a stepwise change from the pixel opening to a self peripheral edge direction in a thickness direction of the display panel;
preferably, the thickness of the pixel defining unit gradually increases from the pixel opening edge to a direction away from the edge and gradually decreases toward the peripheral edge.
3. The display panel according to claim 2, wherein a cross section of the pixel defining unit in the thickness direction includes an arc-shaped edge on a side of the pixel defining layer facing away from the array substrate.
4. The display panel of claim 2, wherein the arc-shaped edge is parabolic, half sine, or half cosine.
5. The display panel according to claim 2, wherein a cross section of the pixel defining unit in the thickness direction includes a dog-legged edge on a side of the pixel defining layer facing away from the array substrate.
6. The display panel according to claim 2, wherein a cross section of the pixel defining unit in the thickness direction includes edges where straight lines and curved lines are alternately arranged, and the edges where the straight lines and the curved lines are alternately arranged are located on a side of the pixel defining layer facing away from the array substrate.
7. The display panel according to claim 1, wherein the pixel defining unit includes a plurality of annular partitions disposed from the pixel opening to the outer peripheral direction thereof, and the annular partitions have the same thickness and different light transmittances in the thickness direction of the display panel.
8. The display panel of claim 1, wherein the pixel defining unit is made of black organic glue.
9. The display panel of claim 1, wherein in the orthographic projection of the pixel defining unit on the array substrate, the minimum distance between the edge facing the pixel opening and the peripheral edge facing away from the pixel opening is 2.5um-3 um.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
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| CN202110865731.2A CN113555411A (en) | 2021-07-29 | 2021-07-29 | Display panel and display device |
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| CN202110865731.2A CN113555411A (en) | 2021-07-29 | 2021-07-29 | Display panel and display device |
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| CN113555411A true CN113555411A (en) | 2021-10-26 |
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