CN110867470B - Display panel, preparation method and display device - Google Patents
Display panel, preparation method and display device Download PDFInfo
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- CN110867470B CN110867470B CN201911150091.6A CN201911150091A CN110867470B CN 110867470 B CN110867470 B CN 110867470B CN 201911150091 A CN201911150091 A CN 201911150091A CN 110867470 B CN110867470 B CN 110867470B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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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
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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
- H10K59/1201—Manufacture or treatment
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- 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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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0686—Adjustment of display parameters with two or more screen areas displaying information with different brightness or colours
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2340/00—Aspects of display data processing
- G09G2340/04—Changes in size, position or resolution of an image
- G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
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Abstract
The embodiment of the invention discloses a display panel, a preparation method and a display device. The display panel includes: the display area comprises a first display area and a light sensing element arrangement area; a substrate base plate; a pixel defining layer located at one side of the substrate base substrate; the pixel limiting layer comprises a plurality of pixel openings, each pixel opening comprises a first pixel opening and a second pixel opening, the first pixel opening is located in the first display area, the second pixel opening is located in the light sensing element arrangement area, and the side wall of the second pixel opening is of a concave structure. The display panel provided by the embodiment of the invention can realize full-screen display and can improve the display effect of the light sensing element arrangement area.
Description
Technical Field
The embodiment of the invention relates to a display technology, in particular to a display panel, a preparation method and a display device.
Background
With the development of display technology, display screens having a high screen ratio are becoming more popular. The screen occupation ratio refers to the ratio of the screen area to the whole machine area, and the high screen occupation ratio has better visual effect and user experience.
Taking a mobile phone as an example, because the front of the mobile phone needs to place components such as a camera and a light sensor, the existing solution is to design a non-display area at the top of the screen, such as a "bang screen", a "water drop screen", and a "hole digging screen", which are widely adopted at present. Along with technical development, make the camera set up regional pixel density and reduce to increase display panel luminousness, be the implementation scheme of a comprehensive screen, nevertheless pixel density reduces, can lead to showing luminance to reduce, and the display effect variation deteriorates, influences user experience.
Disclosure of Invention
The embodiment of the invention provides a display panel, a preparation method and a display device.
In a first aspect, an embodiment of the present invention provides a display panel, including:
the display area comprises a first display area and a light sensing element arrangement area;
a base substrate;
a pixel defining layer on one side of the substrate base plate;
the pixel defining layer comprises a plurality of pixel openings, each pixel opening comprises a first pixel opening and a second pixel opening, the first pixel opening is located in the first display area, the second pixel opening is located in the light sensing element arrangement area, and the side wall of the second pixel opening is of a concave structure.
In a second aspect, based on the same inventive concept, an embodiment of the present invention further provides a method for manufacturing a display panel, where the display panel includes a display area, and the display area includes a first display area and a light-sensing element setting area, and the method includes:
providing a substrate base plate;
forming a pixel defining layer on one side of the substrate base plate;
forming a plurality of pixel openings on the pixel defining layer, wherein the pixel openings comprise a first pixel opening and a second pixel opening, the first pixel opening is located in the first display area, and the second pixel opening is located in the light sensing element arrangement area;
and forming a concave structure on the side wall of the second pixel opening.
In a third aspect, based on the same inventive concept, an embodiment of the present invention further provides a display device, including any one of the display panels described above, further including:
the light sensing element is arranged in the light sensing element arrangement area of the display panel and is positioned on one side, away from the light emitting surface of the display panel, of the substrate base plate, and the light sensing surface of the light sensing element faces towards the display panel.
The display panel provided by the embodiment of the invention comprises a display area, wherein the display area comprises a first display area and a light sensing element arrangement area; a substrate base plate; a pixel defining layer located at one side of the substrate base substrate; the pixel limiting layer comprises a plurality of pixel openings, each pixel opening comprises a first pixel opening and a second pixel opening, the first pixel opening is located in the first display area, the second pixel opening is located in the light sensing element arrangement area, and the side wall of the second pixel opening is of a concave structure. The light sensing element setting area is arranged in the display area of the display panel, so that the light sensing element (such as a camera) is arranged below the display area of the display panel, and the comprehensive screen display effect is realized; the pixel opening of the pixel limiting layer limits the pixel unit of the display area, wherein the first pixel opening is located in the first display area, the second pixel opening is located in the light sensing element setting area, the side wall of the second pixel opening is of a concave structure, oblique light rays emitted by the pixel unit in the light sensing element setting area can be reflected on the side wall of the second pixel opening, and therefore the oblique light rays are emitted from the second pixel opening, the light emitting efficiency of the light sensing element setting area is increased, and the display effect of the light sensing element setting area is improved.
Drawings
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view taken along line A-A' of FIG. 1;
FIG. 3 is a schematic cross-sectional view taken along line A-A' of FIG. 1;
FIG. 4 is a schematic view of another cross-sectional structure taken along the line A-A' in FIG. 1;
FIG. 5 is a schematic view of another cross-sectional structure taken along the line A-A' in FIG. 1;
FIG. 6 is a schematic view of another cross-sectional structure taken along the line A-A' in FIG. 1;
FIGS. 7 and 8 are schematic views of still another cross-sectional structure taken along the line A-A' in FIG. 1;
fig. 9 is a schematic flowchart of a method for manufacturing a display panel according to an embodiment of the invention;
FIGS. 10 to 12 are schematic structural diagrams of display panels corresponding to S141 to S143 in the embodiment of the present invention, respectively;
fig. 13 is a schematic diagram illustrating a result of a mask according to an embodiment of the present invention;
fig. 14 is a schematic flow chart illustrating another method for manufacturing a display panel according to an embodiment of the present invention;
fig. 15 is a schematic structural diagram of a display device according to an embodiment of the present invention.
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.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. It should be noted that the terms "upper", "lower", "left", "right", and the like used in the description of the embodiments of the present invention are used in the angle shown in the drawings, and should not be construed as limiting the embodiments of the present invention. In addition, in this context, it is also to be understood that when an element is referred to as being "on" or "under" another element, it can be directly formed on "or" under "the other element or be indirectly formed on" or "under" the other element through an intermediate element. The terms "first," "second," and the like, are used for descriptive purposes only and not for purposes of limitation, and do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention, and fig. 2 is a schematic sectional structural diagram along a sectional line a-a' of fig. 1. Referring to fig. 1, the display panel provided in this embodiment includes a display area 10, where the display area 10 includes a first display area 11 and a light-sensing element setting area 12; referring to fig. 2, the display panel includes a substrate base 100; a pixel defining layer 200, the pixel defining layer 200 being located at one side of the substrate base plate 100; the pixel defining layer 200 includes a plurality of pixel openings 210, each pixel opening 210 includes a first pixel opening 211 and a second pixel opening 212, the first pixel opening 211 is located in the first display region 11, the second pixel opening 212 is located in the light-sensing element disposing region 12, and a sidewall of the second pixel opening 212 is a concave structure.
It can be understood that the display panel provided in the embodiment of the present invention is suitable for a display device that needs to dispose a light sensing element under a screen, where the light sensing element may be other specific light sensing elements such as a camera and an infrared detector, and the following description will take the light sensing element as the camera as an example. Because the requirement of the camera on light is high, in the prior art, a hollowed area is generally arranged at the edge or inside of a display area, the hollowed area cannot display, and the real comprehensive screen design is difficult to realize. The aperture of the existing camera for receiving light is generally arranged in a circular shape, so that the light-sensing element arrangement area 12 is exemplarily shown in fig. 1 as a circular area. In other embodiments, one or more light-sensing element arrangement regions 12 may be provided, for example, a plurality of light-sensing element arrangement regions 12 may be provided when a plurality of light-sensing elements are provided. The light sensing element disposing region 12 may be a continuous region or a discontinuous region, which may be designed according to the actual application environment, and is not limited herein. In some embodiments, the light sensing element disposing region 12 may be disposed at the edge of the display region of the display panel, or the light sensing element disposing region 12 may be disposed inside the display region of the display panel, as shown in fig. 1. For example, the light sensing element disposition region 12 may be disposed at an upper left corner, an upper right corner, or a middle region of the first display region 11. In practical applications, the specific position of the light-sensing element disposing region 12 may be designed and determined according to practical application environments, which is not limited in the embodiment of the present invention.
In a specific implementation process, the shape of the light sensing element arrangement region 12 may be set to be a regular shape, such as a rectangle, a rounded rectangle, a circle, an ellipse, etc., and the shape of the light sensing element arrangement region 12 may also be set to be an irregular shape, such as a water drop shape. Of course, in practical applications, the shape of the light sensing element disposition region 12 may be designed according to the shape of the elements disposed in the light sensing element disposition region 12, and is not limited herein.
In the embodiment of the present invention, the relative position relationship and the shape of the first display area 11 and the light-sensing element arrangement area 12 are not limited, and may be specifically set according to the screen design of the display device. Taking a mobile phone as an example, the light sensing element setting area 12 can be arranged at the upper left corner or the upper right corner of the display area, the camera is arranged at the corner, and the light sensing element setting area 12 can be used for simple and quick function services such as time display, weather and information reminding.
The display panel provided by the embodiment of the invention comprises a substrate 100, and the substrate 100 can be a rigid substrate, such as a glass substrate, or a flexible substrate, such as a polyimide substrate. The pixel defining layer 200 includes a plurality of pixel openings 210, one Light Emitting element 300 may be disposed in each pixel opening 210, and the Light Emitting element 300 may be an Organic Light-Emitting Diode (OLED). It can be understood that, in order to ensure the imaging effect of the camera, the light transmittance of the light sensing element setting area 12 is improved, optionally, the pixel density of the first display area 11 may be set to be greater than the pixel density of the light sensing element setting area 12, that is, the density of the first pixel opening 211 is greater than the density of the second pixel opening 212, so that the luminance of the light sensing element setting area 12 is lower during normal display, which affects the display effect. In this embodiment, the sidewall of the second pixel opening 212 is a concave structure, and the concave structure may be an arc surface. Referring to fig. 2, the concave structure is recessed toward the inside of the pixel defining layer 200, i.e. the second pixel opening 212 is shaped like a tight bowl, so as to improve the light extraction efficiency of the light-sensing element disposition region 12.
Fig. 2 further exemplarily shows a light-emitting schematic diagram of the light-emitting elements 300 in the first pixel opening 211 and the second pixel opening 212, a part of light emitted from the light-emitting elements 300 in the first pixel opening 211 enters the pixel defining layer 200 and cannot be emitted from the light-emitting surface of the display panel under the absorption, reflection and other actions of the film layers, and a part of light emitted from the light-emitting elements 300 in the second pixel opening 212 enters the concave structure on the sidewall of the second pixel opening 212 to be reflected and then emitted from the second pixel opening 212, so that the light-emitting efficiency of the light-emitting elements 300 is improved, the brightness reduction caused by the density reduction of the second pixel opening 212 is compensated, and the display effect of the light-sensing element installation area 12 is improved.
It should be noted that structures such as a thin film transistor, a plurality of traces, various insulating layers, and a planarization layer in the pixel driving circuit are also included between the substrate 100 and the pixel defining layer 200, which are not shown in fig. 2.
According to the technical scheme of the embodiment of the invention, the light sensing element setting area is arranged in the display area of the display panel, so that the light sensing element (such as a camera) is arranged below the display area of the display panel, and the comprehensive screen display effect is realized; the pixel opening of the pixel limiting layer limits the pixel unit of the display area, wherein the first pixel opening is located in the first display area, the second pixel opening is located in the light sensing element setting area, the side wall of the second pixel opening is of a concave structure, oblique light rays emitted by the pixel unit in the light sensing element setting area can be reflected on the side wall of the second pixel opening, and therefore the oblique light rays are emitted from the second pixel opening, the light emitting efficiency of the light sensing element setting area is increased, and the display effect of the light sensing element setting area is improved. Optionally, the sidewall of the first pixel opening 211 is a planar structure.
On the basis of the above embodiment, fig. 3 is another schematic cross-sectional structure along the cross-sectional line a-a' in fig. 1. Alternatively, referring to fig. 3, the sidewall of the first pixel opening 211 is a concave structure.
It is understood that, in other embodiments, the sidewall of the first pixel opening 211 may also be configured as a concave structure, so as to improve the light extraction efficiency of the first display region 11. It should be noted that, referring to fig. 3, in a specific implementation, the curvature radius of the sidewall concave structure of the first pixel opening 211 may be set to be larger than the curvature radius of the sidewall concave structure of the second pixel opening 212, that is, the sidewall convexity of the second pixel opening 212 is set to be larger, so as to ensure that the light extraction efficiency of the second pixel opening 212 is larger than the light extraction efficiency of the first pixel opening 211.
Fig. 4 is a schematic cross-sectional view taken along line a-a' of fig. 1. Referring to fig. 4, optionally, the sidewall surface of the second pixel opening 212 is provided with an anti-reflection film 213.
It is understood that by disposing the reflection increasing film on the sidewall surface of the second pixel opening 212, the reflectivity of the sidewall of the second pixel opening 212 can be increased, and the light-emitting efficiency of the light-sensing element disposing region 12 can be further improved. Optionally, the reflection increasing film 213 includes at least a first functional film layer having a refractive index greater than that of the pixel defining layer 200.
It can be understood that a quarter-wave film with a refractive index larger than that of the pixel defining layer is plated on the sidewall surface of the second pixel opening 212, and light reflected by the upper and lower surfaces of the film interferes constructively, thereby achieving the effect of increasing the reflectivity. The material of the reflection-increasing film can adopt suitable inorganic material or organic material, and the specific implementation can be selected according to actual conditions. Moreover, by setting the refractive index of the first functional layer to be greater than the refractive index of the pixel defining layer 200, light rays with a large incident angle (greater than a critical angle) can also be totally reflected at the interface between the first functional layer and the pixel defining layer 200, thereby further improving the reflectivity. In practice, it may be difficult to find a functional layer material having a refractive index much greater than that of the pixel defining layer, so in practical implementation, the reflection-increasing film may be configured as a multilayer stack structure with high refractive index and low refractive index alternating. Optionally, the reflection increasing film is not disposed on the sidewall surface of the first pixel opening.
In other embodiments, the reflection increasing film may be disposed on the sidewall surface of the first pixel opening, and the reflection increasing film on the sidewall surface of the first pixel opening may be configured to have a reflectivity smaller than that of the reflection increasing film on the sidewall surface of the second pixel opening.
Fig. 5 is a schematic view of another cross-sectional structure taken along the line a-a' in fig. 1. Referring to fig. 5, optionally, the display panel provided in this embodiment further includes: a plurality of light-emitting elements 300, the light-emitting elements 300 including a first electrode 301, a light-emitting layer 302, and a second electrode 303 laminated in this order, wherein the first electrode 301 is located between the second electrode 303 and the base substrate 100; in the second pixel opening 212, a groove structure is disposed on a surface of the first electrode 301 facing away from the substrate 100.
It is to be understood that, in the present embodiment, the first electrode 301 is a reflective electrode of the light emitting element 300, and the second electrode 203 is an emission electrode. The light emitting device 300 of the present embodiment is a top light emitting structure, and in other embodiments, it can be designed as a bottom light emitting structure. By arranging the groove structure on the surface of the first electrode 301 in the second pixel opening 212, which is away from the substrate 100, the volume or the light emitting area of the light emitting layer can be increased under the condition of the light emitting elements 300 with the same size, so that the light emitting brightness of the light emitting elements 300 in the light sensing element arrangement area 12 is improved, and the display effect is improved.
With continued reference to fig. 5, optionally, in the second pixel opening 212, the light-emitting layer 302 is recessed against a side of the first electrode 301 facing away from the substrate 100, and the second electrode 303 is recessed against a side of the light-emitting layer 302 facing away from the first electrode 301.
By disposing the light-emitting layer 302 and the second electrode 303 to be recessed downward, the light-emitting area of the light-emitting layer 302 in the second pixel opening 212 is larger than the light-emitting area of the light-emitting layer 302 in the first pixel opening 211, so as to improve the brightness of the light-emitting element 300 in the light-sensing element disposing region 12. Further, the concave curvature of the light emitting layer 302 in the second pixel opening 212 may be configured to match the curvature of the opening sidewall, so that more oblique light rays incident on the opening sidewall may be reflected and emitted, thereby improving the light emitting efficiency of the light sensing element disposing region 12 and enhancing the display effect. Alternatively, the curvature of the recess of the light emitting layer 302 in the second pixel opening 212 is set to be equal to the curvature of the opening sidewall.
Fig. 6 is a schematic cross-sectional view taken along line a-a' of fig. 1. Referring to fig. 6, optionally, in the second pixel opening 212, the light emitting layer 302 abuts on a side of the first electrode 301 facing away from the substrate 100, wherein a surface of the side of the light emitting layer 302 facing away from the first electrode 301 is a planar structure.
By arranging the groove structure at the side of the first electrode 301 departing from the substrate base plate 100 in the second pixel opening 212 and adopting a planar structure at the surface of the light-emitting layer 302 departing from the first electrode 301, the light-emitting area of the light-emitting layer 302 in the second pixel opening 212 can be larger than the light-emitting area of the light-emitting layer 302 of the light-emitting element 300 in the first pixel opening 211, so that the light-emitting brightness of the light-sensing element arrangement area 12 is improved, and the display effect is enhanced.
Optionally, with continued reference to fig. 5 or 6, the groove structure comprises a cambered surface structure.
It is understood that the groove structure of the first electrode 301 may be formed by etching, and the etching speed of different regions is controlled during etching, so as to form a curved surface structure. The concave grooves are arranged to be arc-shaped and can be matched with the concave structures on the side walls of the second pixel openings 212, so that light emitted by the light-emitting layer 302 can be emitted from the openings after being reflected by the side walls.
In the embodiments shown in fig. 5 and 6, the first electrode 301 is disposed below the pixel defining layer 200, and in other embodiments, the first electrode 301 may be disposed above the pixel defining layer 200. Illustratively, fig. 7 and 8 are schematic views of still another cross-sectional structure taken along the cross-sectional line a-a' of fig. 1, respectively. Referring to fig. 7 and 8, the first electrode 301 is disposed above the pixel defining layer 200, wherein the first electrode 301 in fig. 8 completely covers the pixel opening 210 of the pixel defining layer 200, so that the first electrode 301 can also function as an anti-reflection film, and the process difficulty is reduced.
It should be noted that fig. 7 and 8 illustrate that the light-emitting layer 302 and the second electrode 303 in the second pixel opening 212 are provided with the recesses only schematically, and in other embodiments, the upper surfaces of the light-emitting layer 302 and the second electrode 303 may be provided with a planar structure. When the first electrode 301 completely covers the pixel opening 210 of the pixel defining layer 200, an insulating layer (for example, a thin film encapsulation layer structure may be used as the insulating layer to simplify the process) needs to be disposed at two ends of the second electrode 303 to prevent the first electrode 301 and the second electrode 303 from being directly electrically connected.
Fig. 9 is a schematic flow chart of a manufacturing method of a display panel according to an embodiment of the present invention, where the manufacturing method provided in this embodiment is used to manufacture the display panel provided in the above embodiment, the display panel includes a display area, the display area includes a first display area and a light-sensing element setting area, and the manufacturing method provided in this embodiment includes:
step S110, a substrate is provided.
The substrate may be a rigid substrate, such as a glass substrate, or a flexible substrate, such as a polyimide substrate, and the specific material of the substrate in this embodiment is not limited.
Step S120, forming a pixel defining layer on one side of the base substrate.
It is understood that before the formation of the pixel defining layer, the thin film transistor, the plurality of traces, various insulating layers, and the planarization layer in the pixel driving circuit are also formed between the substrate and the pixel defining layer, and the specific structure and process can be performed with reference to the steps in the prior art.
Step S130 is to form a plurality of pixel openings on the pixel defining layer, where the pixel openings include a first pixel opening and a second pixel opening, the first pixel opening is located in the first display area, and the second pixel opening is located in the light-sensing element setting area.
Step S140 is to form a concave structure on the sidewall of the second pixel opening.
The concave structure is sunken towards the inside of the pixel limiting layer, namely, the second pixel opening is shaped like a tight bowl, so that the light emitting efficiency of the light sensing element setting area is improved.
According to the display panel prepared by the preparation method provided by the embodiment of the invention, the light sensing element setting area is arranged in the display area of the display panel, so that the light sensing element (such as a camera) is arranged below the display area of the display panel, and the comprehensive screen display effect is realized; the pixel opening of the pixel limiting layer limits the pixel unit of the display area, wherein the first pixel opening is located in the first display area, the second pixel opening is located in the light sensing element setting area, the side wall of the second pixel opening is of a concave structure, oblique light rays emitted by the pixel unit in the light sensing element setting area can be reflected on the side wall of the second pixel opening, and therefore the oblique light rays are emitted from the second pixel opening, the light emitting efficiency of the light sensing element setting area is increased, and the display effect of the light sensing element setting area is improved.
Optionally, forming a concave structure on a sidewall of the second pixel opening includes:
step S141, forming photoresist on the surface of one side, away from the substrate, of the pixel defining layer;
step S142, utilizing a mask plate to carry out exposure and development treatment on the photoresist;
step S143, etching the pixel limiting layer, and forming a concave structure in the second pixel opening;
the mask plate comprises a plurality of preset light through holes corresponding to the second pixel openings, and the transmittance of the preset light through holes is gradually reduced from the center to the edge.
Fig. 10 to 12 are schematic structural diagrams of display panels corresponding to S141 to S143 in the embodiment of the present invention, respectively. In this example, the concave structure of the sidewall of the second pixel opening may be formed by a photolithography process. Referring to fig. 10, a photoresist 400 is formed on a surface of the pixel defining layer 200 facing away from the substrate 100, referring to fig. 11, then a mask 500 is used to cover the photoresist 400, the photoresist 400 is exposed and developed, the shape of the second pixel opening is transferred to the pixel defining layer 200, referring to fig. 12, and finally the pixel defining layer 200 is etched, and a concave structure is formed in the second pixel opening.
Fig. 13 is a schematic diagram illustrating a result of the mask according to the embodiment of the present invention. Referring to fig. 13, the mask includes a plurality of predetermined light passing holes 501 corresponding to the second pixel openings, and the transmittance of the predetermined light passing holes 501 gradually decreases from the center toward the edges (in the direction of arrows in fig. 13).
It is to be understood that the mask shown in fig. 13 shows only a partial structure of the region corresponding to the light-sensing element disposition region, and the first display region corresponding portion may be provided with the same structure as that of the mask in the related art or may be provided with light-passing holes similar to the light-sensing element disposition region.
Fig. 14 is a schematic flow chart illustrating another method for manufacturing a display panel according to an embodiment of the present invention. Referring to fig. 14, after forming the concave structure on the sidewall of the second pixel opening, optionally, the method further includes:
step S150, forming an anti-reflection film on the sidewall surface of the second pixel opening.
The reflection increasing film is arranged on the surface of the side wall of the second pixel opening, so that the reflectivity of the side wall of the second pixel opening can be increased, and the light emitting efficiency of the light sensing element arrangement area is further improved. Optionally, the reflection-increasing film at least includes a first functional film layer, and the refractive index of the first functional film layer is greater than that of the pixel defining layer.
Optionally, before forming the pixel defining layer on one side of the substrate base plate, the method further includes:
forming a first electrode in the pixel opening region; and etching the first electrode in the light sensing element arrangement area to form a groove structure.
Optionally, before forming the pixel defining layer on one side of the substrate base plate, the method further includes:
forming a first electrode in the pixel opening region; after forming the concave structure on the sidewall of the second pixel opening, the method further includes:
and etching the first electrode in the light sensing element arrangement area to form a groove structure.
It is understood that, referring to the display panel shown in fig. 5 and fig. 6, the first electrode 301 may be disposed below the pixel defining layer 200, that is, the film layer where the first electrode 301 is located is formed before the pixel defining layer 200, and in the process of preparing the display panel, the groove structure of the first electrode 301 may be formed first, or the concave structure of the sidewall of the second pixel opening 212 may be formed first, and the order of the steps is not limited in this embodiment. When the film layers such as the luminous layer and the like are manufactured, the film layers can be formed through an evaporation process, and the groove structure or the plane structure is formed on the upper surface of the film layer by controlling the film coating speed.
Optionally, before forming the concave structure on the sidewall of the second pixel opening, the method further includes:
forming a first electrode in the pixel opening; and etching the first electrode in the light sensing element arrangement area to form a groove structure.
Optionally, after forming the concave structure on the sidewall of the second pixel opening, the method further includes:
forming a first electrode in the pixel opening; and etching the first electrode in the light sensing element arrangement area to form a groove structure.
It is understood that, referring to the display panel shown in fig. 7 and fig. 8, the first electrode 301 may be disposed above the pixel defining layer 200, that is, the film layer where the first electrode 301 is located is formed after the pixel defining layer 200, and in the process of preparing the display panel, the groove structure of the first electrode 301 may be formed first, or the concave structure of the sidewall of the second pixel opening 212 may be formed first, and the order of the steps is not limited in this embodiment.
Optionally, the preparation method provided in this embodiment further includes:
a concave structure is formed on a sidewall of the first pixel opening.
Referring to fig. 3, in addition to forming the concave structure on the sidewall of the second pixel opening 212, a concave structure may be formed on the sidewall of the first pixel opening 211, so as to improve the light extraction efficiency of the first display region 11. It should be noted that, in a specific implementation, the curvature radius of the sidewall concave structure of the first pixel opening 211 may be set to be larger than the curvature radius of the sidewall concave structure of the second pixel opening 212, that is, the sidewall convexity of the second pixel opening 212 is set to be larger, so as to ensure that the light extraction efficiency of the second pixel opening 212 is larger than the light extraction efficiency of the first pixel opening 211.
Fig. 15 is a schematic structural diagram of a display device according to an embodiment of the present invention. Referring to fig. 15, the display device 1 includes any one of the display panels 2 provided in the above embodiments, and further includes: the light sensing element 3 is disposed in the light sensing element disposing area of the display panel 2, and is located on a side of the substrate away from the light emitting surface of the display panel, and the light sensing surface of the light sensing element 3 faces the display panel 2. The display device 1 may be a mobile phone, a tablet computer, an intelligent wearable device, and the like.
It is understood that the light sensing element 3 may be a camera. The display device provided by the embodiment of the invention comprises any one of the display panels provided by the above embodiments, and has the same and corresponding technical effects.
It is to be noted that the foregoing description is only exemplary of the invention and that the principles of the technology may be 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 some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.
Claims (11)
1. A display panel, comprising:
the display area comprises a first display area and a light sensing element arrangement area;
a substrate base plate;
a pixel defining layer on one side of the substrate base plate;
the pixel defining layer comprises a plurality of pixel openings, each pixel opening comprises a first pixel opening and a second pixel opening, the first pixel opening is located in the first display area, the second pixel opening is located in the light sensing element arrangement area, and the side wall of each second pixel opening is of a concave structure;
further comprising:
a plurality of light emitting elements including a first electrode, a light emitting layer, and a second electrode stacked in this order, wherein the first electrode is located between the second electrode and the base substrate;
in the second pixel opening, a groove structure is arranged on the surface of one side, away from the substrate, of the first electrode;
in the second pixel opening, the light-emitting layer is sunken and attached to one side, away from the substrate, of the first electrode, and the second electrode is attached to one side, away from the first electrode, of the light-emitting layer;
and one side surface of the light-emitting layer, which is far away from the first electrode, is of a planar structure.
2. The display panel according to claim 1, wherein a sidewall surface of the second pixel opening is provided with an antireflection film.
3. The display panel of claim 2, wherein the reflection-increasing film comprises at least a first functional film layer having a refractive index greater than a refractive index of the pixel defining layer.
4. The display panel of claim 1, wherein the groove structure comprises a curved structure.
5. The display panel according to claim 1, wherein the first pixel aperture density is greater than the second pixel aperture density.
6. The display panel according to claim 1, wherein the sidewall of the first pixel opening has a concave structure.
7. A preparation method of a display panel, wherein the display panel comprises a display area, the display area comprises a first display area and a light sensation element setting area, and the preparation method comprises the following steps:
providing a substrate base plate;
forming a pixel defining layer on one side of the substrate base plate;
forming a plurality of pixel openings on the pixel defining layer, wherein the pixel openings comprise a first pixel opening and a second pixel opening, the first pixel opening is located in the first display area, and the second pixel opening is located in the light sensing element arrangement area;
forming a concave structure on a sidewall of the second pixel opening;
wherein, before forming the pixel limiting layer on one side of the substrate base plate, the method further comprises the following steps:
forming a first electrode in the pixel opening region;
etching the first electrode in the light sensing element arrangement area to form a groove structure;
alternatively, the first and second electrodes may be,
before forming the pixel defining layer on one side of the substrate base plate, the method further comprises the following steps:
forming a first electrode in the pixel opening region;
after forming the concave structure on the sidewall of the second pixel opening, the method further includes:
etching the first electrode in the light sensing element arrangement area to form a groove structure;
alternatively, the first and second electrodes may be,
before forming the concave structure on the sidewall of the second pixel opening, the method further includes:
forming a first electrode in the pixel opening;
etching the first electrode in the light sensing element arrangement area to form a groove structure;
alternatively, the first and second electrodes may be,
after forming the concave structure on the sidewall of the second pixel opening, the method further includes:
forming a first electrode in the pixel opening;
etching the first electrode in the light sensing element arrangement area to form a groove structure;
the display panel further comprises a light emitting layer and a second electrode layer, in the second pixel opening, the light emitting layer is sunken and attached to one side, away from the substrate, of the first electrode, and the second electrode is attached to one side, away from the first electrode, of the light emitting layer;
and the surface of one side of the light-emitting layer, which is far away from the first electrode, is of a planar structure.
8. The method according to claim 7, wherein the forming a concave structure on the sidewall of the second pixel opening comprises:
forming photoresist on the surface of one side, away from the substrate, of the pixel defining layer;
exposing and developing the photoresist by using a mask plate;
etching the pixel limiting layer, and forming the concave surface structure in the second pixel opening;
the mask plate comprises a plurality of preset light through holes corresponding to the second pixel openings, and the transmittance of the preset light through holes is gradually reduced from the center to the edge.
9. The method as claimed in claim 7, further comprising, after forming the concave structure on the sidewall of the second pixel opening:
and forming an anti-reflection film on the surface of the side wall of the second pixel opening.
10. The method of manufacturing according to claim 7, further comprising:
and forming a concave structure on the side wall of the first pixel opening.
11. A display device comprising the display panel according to any one of claims 1 to 6, further comprising:
the light sensing element is arranged in the light sensing element arrangement area of the display panel and is positioned on one side, away from the light emitting surface of the display panel, of the substrate base plate, and the light sensing surface of the light sensing element faces towards the display panel.
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| CN111446276A (en) * | 2020-03-31 | 2020-07-24 | 武汉天马微电子有限公司 | Display panel and display device |
| CN111490080B (en) * | 2020-04-16 | 2022-08-16 | 云谷（固安）科技有限公司 | Display panel and display device thereof |
| CN111754876B (en) * | 2020-06-28 | 2022-06-21 | 昆山国显光电有限公司 | Display panel and display device |
| WO2022052204A1 (en) * | 2020-09-10 | 2022-03-17 | 京东方科技集团股份有限公司 | Display substrate and manufacturing method therefor, and display panel |
| CN112259575B (en) * | 2020-09-24 | 2024-05-31 | 维信诺科技股份有限公司 | Display panel and electronic terminal |
| CN112099256B (en) * | 2020-09-28 | 2022-11-01 | 厦门天马微电子有限公司 | Display panel and display device |
| CN113345336B (en) * | 2021-05-31 | 2023-06-06 | 上海天马微电子有限公司 | Display panel and manufacturing method thereof |
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