CN113871446A

CN113871446A - Display panel and display device

Info

Publication number: CN113871446A
Application number: CN202111137123.6A
Authority: CN
Inventors: 代好
Original assignee: Wuhan Tianma Microelectronics Co Ltd
Current assignee: Wuhan Tianma Microelectronics Co Ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2021-12-31

Abstract

The embodiment of the application provides a display panel and a display device, wherein the display panel comprises a main display area and a light-transmitting display area, and the main display area surrounds at least part of the light-transmitting display area. The display panel comprises a first common electrode, a second common electrode and at least one first supporting piece; the first common electrode is arranged in the light-transmitting display area and comprises a plurality of hollow parts, and the second common electrode is arranged in the main display area; the first supporting piece is arranged in the light-transmitting display area. The light-transmitting display area comprises a first area and a second area, and the second area is positioned on one side of the first area close to the main display area; the sum of the projected areas of the first supporting members arranged in the unit area of the second area is larger than the sum of the projected areas of the first supporting members arranged in the unit area of the first area. When two mask plates are used for preparing the graphical cathode, the mask plates can be well supported by the first supporting piece, the functional film layer of the display panel is prevented from being scratched by the mask plates, and the yield of finished products of the display panel is effectively improved.

Description

Display panel and display device

[ technical field ] A method for producing a semiconductor device

The application relates to the technical field of display, in particular to a display panel and a display device.

[ background of the invention ]

As consumer demand for displays increases, full-screen displays have become the focus of current research. In the prior art, an important technology for realizing a full-screen is to integrate functions such as a camera, an infrared sensor, facial recognition and the like below a display screen, and the functions put higher requirements on the transmittance of the display screen.

In the manufacturing process of an Organic Light-Emitting Diode (OLED) display panel, a common electrode of an OLED device generally includes a metal material, and has a great influence on Light transmittance of a display screen.

[ application contents ]

In view of the above, embodiments of the present application provide a display panel and a display device to solve the above problems.

In a first aspect, an embodiment of the present application provides a display panel, including a main display area and a light-transmitting display area, where the main display area surrounds at least a part of the light-transmitting display area; the display panel comprises a first common electrode, a second common electrode and at least one first supporting piece, wherein the first common electrode is arranged in the light-transmitting display area and comprises a plurality of hollow parts; the second common electrode is arranged in the main display area, and the second common electrode is arranged on the whole surface of the main display area; the first supporting piece is arranged in the light-transmitting display area. The light-transmitting display area comprises a first area and a second area, the second area at least surrounds part of the first area, and the second area is positioned on one side, close to the main display area, of the first area; in the thickness direction of the display panel, the sum of the projection areas of the first supporting pieces arranged in the unit area of the second area is larger than the sum of the projection areas of the first supporting pieces arranged in the unit area of the first area.

In one implementation of the first aspect, the second region includes a first support, and the first support surrounds at least a portion of the first region.

In one implementation of the first aspect, the second region includes at least two first supports, the at least two first supports surrounding at least a portion of the first region.

In one implementation manner of the first aspect, a center line or a center connecting line of a projection of the first support in the second region is a broken line shape in a thickness direction of the display panel.

In one implementation of the first aspect, the main display area includes a plurality of second sub-pixels, and the light-transmissive display area includes a plurality of first sub-pixels; the first support member located in the second area is located between the adjacent first sub-pixel and the second sub-pixel along the direction in which the main display area points to the second area.

In one implementation manner of the first aspect, in the thickness direction of the display panel, the minimum distance between the orthographic projection of the first support located in the second region on a plane parallel to the display panel and the orthographic projection of the adjacent first sub-pixel on the plane parallel to the display panel is D1, and D1 is greater than or equal to 3 μm; the minimum distance between the orthographic projection of the first support in the second area on the plane parallel to the display panel and the orthographic projection of the adjacent second sub-pixel on the plane parallel to the display panel is D2, and D2 is more than or equal to 3 mu m.

In one implementation of the first aspect, D1 ═ D2.

In an implementation manner of the first aspect, the plurality of hollow portions include a first hollow portion located in the second area, and the first hollow portion at least partially covers the first supporting member along a direction perpendicular to a plane where the display panel is located.

In one implementation form of the first aspect, the first common electrode includes a portion located at the second region, and at least a portion of the first common electrode located at the second region is covered with the first support.

In one implementation form of the first aspect, at least a part of the first support is not completely covered by the first common electrode in a thickness direction of the display panel.

In a second aspect, an embodiment of the present application provides a display panel, including a main display area and a light-transmissive display area, where the main display area surrounds at least a part of the light-transmissive display area; the light-transmitting display area comprises a plurality of first supporting pieces and a plurality of first sub-pixels, and at least part of the first sub-pixels are positioned in the light-transmitting display area and close to the edge of the main display area; the main display area comprises a plurality of second sub-pixels, and at least part of the second sub-pixels are positioned in the main display area and close to the edge of the light-transmitting display area. Wherein a first support member is arranged between at least part of the adjacent first sub-pixels and second sub-pixels.

In one implementation manner of the second aspect, in at least some of the first sub-pixels, a first support member is disposed between adjacent first sub-pixels.

In one implementation of the second aspect, a minimum distance between an orthographic projection of the first support on a plane parallel to the display panel and an orthographic projection of the adjacent first sub-pixel on the plane parallel to the display panel is D, wherein D ≧ 3 μm, in a thickness direction of the display panel.

In a third aspect, an embodiment of the present application provides a display device, including the display panel and the optical functional element provided in any one of the above aspects; the optical functional element is arranged at the position of the display device corresponding to the light-transmitting display area.

In one implementation form of the third aspect, the optical function element is at least one of an optical fingerprint sensor, an iris recognition sensor, a camera, and a flashlight.

In the application, the light transmittance of the light-transmitting display area can be improved by carrying out graphical design on the first common electrode in the light-transmitting display area. The preparation processes of the first common electrode and the second common electrode can be both evaporation processes, and the patterning of the first common electrode and the second common electrode is usually completed by combining two mask plates.

In one preparation method of the common electrode, the first mask is used for preparing the second common electrode and the first part of the first common electrode, the first mask comprises a shielding part and a hollow part, and the evaporation material is deposited in the hollow part of the first mask to form the second common electrode and the first part of the first common electrode. In the preparation process of the second common electrode and the first part of the first common electrode, the hollow part of the first mask plate corresponds to the area where the second common electrode and the first part of the first common electrode are located, and the shielding part corresponds to the area where the second common electrode and the first part of the first common electrode are not arranged. In the preparation process of the display panel, when the first mask plate is used for preparing the second common electrode and the first part of the first common electrode, the first supporting piece is used for supporting the shielding part of the first mask plate, and the supporting area of the first supporting piece in the second area is large, so that the edge of the shielding part of the first mask plate can be effectively prevented from contacting with a prepared film layer in the light-transmitting display area, and the first mask plate is prevented from scratching a functional film layer in the light-transmitting display area.

The second mask plate is used for preparing a second part of the first public electrode, the second mask plate comprises a shielding part and a hollow part, and the second part of the first public electrode is formed when the evaporation material is deposited in the hollow part of the second mask plate. In other words, in the preparation process of the second part of the first common electrode, the hollow part of the second mask plate corresponds to the area where the second part of the first common electrode is located, and the shielding part corresponds to the area where the second part of the first common electrode is not arranged. In the preparation process of the display panel, when the second mask plate is used for preparing the second part of the first common electrode, the first supporting piece is used for supporting the shielding part of the second mask plate, and the supporting area of the first supporting piece in the second area is large, so that the second mask plate can be effectively prevented from contacting with a prepared film layer in the display panel, and the second mask plate is prevented from scratching a functional film layer of the display panel.

Since the sum of the projected areas of the first support members per unit area in the second region is larger than the sum of the projected areas of the first support members per unit area in the first region, that is, the support area of the first support members in the second region is larger. Even if the alignment deviation appears between the mask plate and the display panel, the mask plate can be well supported by the first supporting piece in the second area, and the functional film layer of the display panel is prevented from being scratched by the mask plate. Especially, the edge of the shielding part of the first mask plate can be effectively supported by the first supporting piece in the second area, so that the first mask plate is prevented from scratching the functional film layer in the light-transmitting display area. The yield of the finished products of the display panel is effectively improved.

[ description of the 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 will be briefly described below, and it is obvious that the drawings in the following description 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 view of a display panel according to an embodiment of the present disclosure;

FIG. 2 is an enlarged view of the area BB in FIG. 1;

fig. 3 is a schematic view of a first mask provided in an embodiment of the present application;

fig. 4 is a schematic view of a second mask provided in the embodiment of the present application;

FIG. 5 is a schematic diagram of a common electrode fabrication method according to the present application;

fig. 6 is a schematic view of another first mask provided in the embodiment of the present application;

fig. 7 is a schematic view of another second mask provided in the embodiment of the present application;

FIG. 8 is a schematic diagram of another common electrode manufacturing method according to the present application

FIG. 9 is a schematic view of a light transmissive display region according to the present application;

FIG. 10 is a schematic view of another light transmissive display region according to the present application;

FIG. 11 is a schematic view of another light transmissive display region according to the present application;

FIG. 12 is a partial schematic view of a display panel according to the present application;

FIG. 13 is a cross-sectional view taken along line A-A' of FIG. 12;

FIG. 14 is a schematic view of a projection position of a first support and a sub-pixel according to the present application;

FIG. 15 is a partial schematic view of another display panel according to the present application;

FIG. 16 is a cross-sectional view taken along line A-A' of FIG. 15;

fig. 17 is a schematic diagram illustrating a projection position of a first common electrode and a first support member according to the present application;

FIG. 18 is a schematic view of another light transmissive display region according to the present application;

fig. 19 is a schematic view of another display panel provided in an embodiment of the present application;

fig. 20 is a schematic view of another display panel provided in an embodiment of the present application;

FIG. 21 is a partial schematic view of a display panel according to the present application;

FIG. 22 is a schematic projection view of a first support and a first sub-pixel according to the present disclosure;

fig. 23 is a schematic view of a display device according to an embodiment of the present application.

[ detailed description ] embodiments

For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.

It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description herein, it is to be understood that the terms "substantially", "approximately", "about", "substantially", and the like, as used in the claims and the examples herein, are intended to be generally accepted as not being precise, within the scope of reasonable process operation or tolerance.

It should be understood that although the terms first, second, etc. may be used in the embodiments of the present application to describe electrodes, regions, etc., these electrodes, regions, etc. should not be limited by these terms. These terms are only used to distinguish electrodes, regions, etc. from one another. For example, the first common electrode may also be referred to as a second common electrode, and similarly, the second common electrode may also be referred to as a first common electrode without departing from the scope of the embodiments of the present application.

Fig. 1 is a schematic view of a display panel according to an embodiment of the present disclosure, and fig. 2 is an enlarged view of a BB area in fig. 1.

The inventor analyzes the problem that the public electrode of the light-emitting device influences the light transmittance of the display panel, and finds that the screen transmittance can be well improved by carrying out graphical design on the public cathode of the light-emitting device. The cathode patterning may be prepared using an evaporation process. When the patterned cathode is prepared by using an evaporation process, two mask plates are generally needed to realize the preparation. In order to save the manufacturing cost, the patterned cathode is usually prepared by using a Common Metal Mask (CMM) and a Fine Metal Mask (FMM) in combination. The CMM is low in cost, but due to the fact that a single-side etching process is used, when the patterned cathode is prepared, the edge of the blocking portion of the CMM is very easy to scratch a functional film layer of the display panel, and the finished product yield of the OLED display panel is reduced.

With reference to fig. 1 and fig. 2, an embodiment of the present disclosure provides a display panel 01, which includes a main display area AA and a transparent display area BB, wherein the main display area AA surrounds at least a portion of the transparent display area BB. That is, the light-transmissive display area BB may be entirely surrounded by the main display area AA, or as shown in fig. 1, the light-transmissive display area BB may be partially surrounded by the main display area AA. The display panel 01 includes a first common electrode 11, a second common electrode 21, and at least one first support 12, the first common electrode 11 is disposed in the light-transmitting display region BB, and the first common electrode 11 includes a plurality of hollow portions 110. In this embodiment, the first common electrode 11 and the second common electrode 21 may be a cathode disposed in the transmissive display area BB and a cathode disposed in the main display area AA, respectively.

It can be understood that the arrangement of the hollow portion 110 enables the cathode of the light-transmitting display area BB to present a patterned structure, which can improve the light transmittance of the light-transmitting display area BB. The second common electrode 21 is disposed in the main display area AA, and the second common electrode 21 is disposed over the entire main display area AA. The first support 12 is disposed in the light-transmissive display region BB. The light-transmitting display region BB includes a first region B1 and a second region B2, the second region B2 surrounds at least a part of the first region B1, and the second region B2 is located on a side of the first region B1 close to the main display region AA. It should be noted that the first region B1 may be completely surrounded by the second region B2, or may be partially surrounded by the second region B2.

Wherein, in the thickness direction of the display panel 01, the sum of the projected areas of the first supports 12 per unit area in the second region B2 is greater than the sum of the projected areas of the first supports 12 per unit area in the first region B1. For example, the sum of the projected areas of the first support 12 in each square millimeter of the second region B2 is larger than the sum of the projected areas of the first support 12 in each square millimeter of the first region B1. Note that, in the case where the projected area of the single first support 13 in the second region B2 is the same as the projected area of the single first support 13 in the first region B1 in the thickness direction of the display panel 01, the sum of the projected areas of the first supports 12 per unit area in the second region B2 is larger than the sum of the projected areas of the first supports 12 per unit area in the first region B1, which means that the density of the first supports 12 in the second region B2 is larger than the density of the first supports 12 in the first region B1. Alternatively, taking the size of the region in which one or two minimum pixel repeating units are located as a unit area, the sum of the projected areas of the first support member 12 per unit area in the second region B2 is larger than the sum of the projected areas of the first support member 12 per unit area in the first region B1.

In the present application, it can be understood that the preparation processes of the first common electrode 11 and the second common electrode 21 are both evaporation processes, and in the region where the non-light-emitting pixel is located, when the ambient light passes through the region, the light transmittance of the region where the non-light-emitting pixel is located is reduced due to the existence of the common electrode, and a part of the ambient light is lost. The common electrode in the area where the non-luminous pixel is located is reduced, and the light transmittance of the area where the non-luminous pixel is located can be improved. That is, the light transmittance of the light-transmitting display region BB can be increased by patterning the common electrode of the light-transmitting display region BB. When the evaporation process is used for preparing the patterned common electrode, two mask plates are generally required to be combined for realization. In order to save the manufacturing cost, a Common Metal Mask (CMM) and a Fine Metal Mask (FMM) are usually used in combination to prepare the patterned cathode. Since CMMs are typically used to prepare large areas of common electrodes, the cutouts of CMMs are large. The CMM with a larger hollow portion is generally prepared by a single-sided etching method, and the cost is lower, but this causes more burrs to be generated at the edge of the shielding portion in the CMM, so the shielding portion surrounding the hollow portion is more likely to scratch the functional film layer of the display panel, and especially the scratch of the shielding portion located in the transparent display area BB on the functional film layer of the display panel 01 affects the yield and the display effect of the display panel 01.

In the present application, the first support 12 is used to support the CMM and the FMM, and prevent the CMM and the FMM from scratching the functional film layers that have been prepared in the display panel 01. In particular, the edge of the mask of the CMM can be effectively supported, and the prepared functional film layer is prevented from being scratched by the edge of the mask of the CMM.

Fig. 3 is a schematic view of a first mask provided in an embodiment of the present application, and fig. 4 is a schematic view of a second mask provided in the embodiment of the present application; FIG. 5 is a schematic diagram of a common electrode fabrication method according to the present application; fig. 6 is a schematic view of another first mask provided in the embodiment of the present application, and fig. 7 is a schematic view of another second mask provided in the embodiment of the present application; fig. 8 is a schematic diagram of another method for preparing a common electrode according to the present application.

In this application, there are a number of ways to prepare a patterned common electrode using a CMM and FMM. For convenience of description, the CMM is referred to as a first mask M1, and the FMM is referred to as a second mask M2.

Illustratively, as shown in fig. 5, the first preparation method is: the second common electrode 21 was prepared using the first mask M1, and the first common electrode 11 was prepared using the second mask M2.

Referring to fig. 3, 4 and 5, the second common electrode 21 is prepared by using a first mask M1, the first mask M1 includes a shielding portion M11 and a hollow portion M12, and the second common electrode 21 is formed when the evaporation material is deposited in the hollow portion M12 of the first mask M1. That is, in the process of preparing the second common electrode 21, the hollow portion M12 of the first mask M1 corresponds to the area where the second common electrode 21 is located, and the shielding portion M11 corresponds to the area where the second common electrode 21 is not located. In the preparation process of the display panel 01, when the first mask M1 is used to prepare the second common electrode 21, the first support 12 is used to support the shielding portion M11 of the first mask M1, and the supporting area of the first support 12 in the second region B2 is large, so that the edge of the shielding portion M11 of the first mask M1 can be effectively prevented from contacting with the prepared film layer in the transparent display region BB, and the first mask M1 is prevented from scratching the functional film layer of the transparent display region BB.

The preparation of the first common electrode 11 requires the second mask M2, the second mask M2 includes a shielding portion M21 and a hollow portion M22, and the evaporation material is deposited in the hollow portion M22 of the second mask M2 to form the first common electrode 11. That is, in the process of preparing the first common electrode 11, the hollow portion M22 of the second mask M2 corresponds to the area where the first common electrode 11 is located, and the shielding portion M21 corresponds to the area where the first common electrode 11 is not located. In the preparation process of the display panel 01, when the second mask M2 is used to prepare the first common electrode 11, the first support 12 is used to support the shielding portion of the second mask M2, and the support area of the first support 12 in the second region B2 is large, so that the second mask M2 can be effectively prevented from contacting with the prepared film layer in the display panel 01, and the second mask M2 is prevented from scratching the functional film layer of the display panel 01.

As shown in fig. 8, the second preparation method is: the second common electrode 21 and the first portion 11A of the first common electrode 11 were prepared using the first mask M1, and the second portion 11B of the first common electrode 11 was prepared using the second mask M2. In the two preparation methods, the first support 12 effectively supports the first mask M1 and the second mask M2, so that the mask is prevented from scratching the prepared functional film.

Referring to fig. 6, 7 and 8, the preparation of the second common electrode 21 and the first portion 11A of the first common electrode 11 requires a first mask M1, the first mask M1 includes a shielding portion M11 and a hollow portion M12, and the evaporation material is deposited in the hollow portion M12 of the first mask M1 to form the second common electrode 21 and the first portion 11A of the first common electrode 11. That is, in the process of preparing the second common electrode 21 and the first portion 11A of the first common electrode 11, the hollow portion M12 of the first mask M1 corresponds to the area where the second common electrode 21 and the first portion 11A of the first common electrode 11 are located, and the shielding portion M11 corresponds to the area where the second common electrode 21 and the first portion 11A of the first common electrode 11 are not located. In the preparation process of the display panel 01, when the first mask M1 is used to prepare the second common electrode 21 and the first portion 11A of the first common electrode 11, the first support 12 is used to support the shielding portion M11 of the first mask M1, and the supporting area of the first support 12 in the second region B2 is large, so that the edge of the shielding portion M11 of the first mask M1 can be effectively prevented from contacting with the prepared film layer in the transparent display region BB, and the first mask M1 is prevented from scratching the functional film layer of the transparent display region BB.

The second mask M2 is required for preparing the second portion 11B of the first common electrode 11, the second mask M2 includes a shielding portion M21 and a hollow portion M22, and the second portion 11B of the first common electrode 11 is formed when the evaporation material is deposited in the hollow portion M22 of the second mask M2. That is, in the process of preparing the second portion 11B of the first common electrode 11, the hollow portion M22 of the second mask M2 corresponds to the area where the second portion 11B of the first common electrode 11 is located, and the shielding portion M21 corresponds to the area where the second portion 11B of the first common electrode 11 is not located. In the preparation process of the display panel 01, when the second mask M2 is used to prepare the second portion 11B of the first common electrode 11, the first support 12 is used to support the shielding portion of the second mask M2, and the support area of the first support 12 in the second region B2 is large, so that the second mask M2 can be effectively prevented from contacting with the prepared film layer in the display panel 01, and the second mask M2 can be prevented from scratching the functional film layer of the display panel 01.

In the thickness direction of the display panel 01, since the sum of the projected areas of the first supports 12 per unit area in the second region B2 is larger than the sum of the projected areas of the first supports 12 per unit area in the first region B1, that is, the supporting area of the first supports 12 in the second region B2 is larger. Even if the alignment deviation occurs between the mask plate and the display panel 01, the mask plate can be well supported by the first supporting piece 12 in the second area B2, and the functional film layer of the display panel 01 is prevented from being scratched by the mask plate. Particularly, the edge of the shielding portion M11 of the first mask M1 can be effectively supported by the first support 12 in the second region B2, so as to prevent the first mask M1 from scratching the functional film layer in the transparent display region BB. The yield of the finished products of the display panel 01 is effectively improved.

In one embodiment of the present application, as shown in fig. 2, the second region B2 includes a first support 12, and the first support 12 at least partially surrounds the first region B1. Optionally, the edges of the first region B1 near the second region B2 are completely surrounded by the first supports 12 in the second region B2. It should be noted that when the second region B2 includes a plurality of first supports 12, the plurality of first supports 12 are connected into a whole, and the plurality of first supports 12 should be regarded as one first support 12. Further, the first supports 12 in the second region B2 are located at the edge of the second region B2 near the main display area AA. In the process of preparing the first common electrode 11 and the second common electrode 21, the first supporting member 12 located at the edge of the second region B2 close to the main display region AA can well support the shielding portion of the mask plate, so as to avoid the situation that the mask plate is not effectively supported at the junction of the main display region AA and the transparent display region BB, and thus prevent the mask plate from scratching the functional film layer of the display panel 001.

Fig. 9 is a schematic view of a light-transmitting display region according to the present application, and fig. 10 is a schematic view of another light-transmitting display region according to the present application.

In one embodiment of the present application, as shown in fig. 9, the second region B2 includes at least two first supports 12, the at least two first supports 12 surrounding at least a portion of the first region B1. Optionally, the first supports 12 in the second region B2 are uniformly distributed along the edge extending direction of the second region B2 and the first region B1. It should be noted that the first supports 12 in the second region B2 may also be non-uniformly distributed along the edge extending direction of the second region B2 and the first region B1, as shown in fig. 10. Further, the first supports 12 in the second region B2 are located in the second region B2 near the edge of the main display region AA.

Fig. 11 is a schematic view of another light-transmitting display region according to the present application.

As shown in fig. 11, in an embodiment of the present application, along the thickness direction of the display panel 01, the center line or the center connection line of the projections of the plurality of first supports 12 in the second region B2 is a zigzag shape, that is, when one first support 12 is included in the second region B2, the center line of the first support 12 is a zigzag shape; when the second region B2 includes a plurality of first supporting members 12, the first supporting members 12 are arranged along an imaginary folding line.

It will be appreciated that only one first support 12 may be included in the second region B2, the first support 12 being serrated in shape. The second region B2 may further include a plurality of second supporting members 12, and along the thickness direction of the display panel 01, the projections of the plurality of second supporting members 12 are sequentially connected to form a folding line including a first segment extending along the first direction X and a second segment extending along the second direction Y, that is, the plurality of first supporting members 12 are arranged in a staggered manner. For example, the plurality of first supports 12 are staggered along the edge of the second region B2. It can be understood that the non-linear arrangement of the first supports 12 improves the stability when the first supports 12 support the mask. Optionally, the first supports 12 in the second region B2 are arranged in a zigzag pattern. Further, the first supports 12 within the second region B2 are located in the second region B2 near the edge of the main display area AA. When the first common electrode 11 and the second common electrode 21 are prepared by using the mask plate, the mask plate is supported by the first supporting piece 12 in the second area B2 at the junction of the main display area AA and the transparent display area BB more stably, so that the mask plate is prevented from contacting with the prepared film layer in the display panel 01, and the functional film layer of the display panel 001 is prevented from being scratched by the mask plate.

FIG. 12 is a partial schematic view of a display panel according to the present application; fig. 13 is a cross-sectional view taken along line a-a' of fig. 12.

In an embodiment of the present application, please refer to fig. 12 and 13, the display panel 01 further includes a substrate 10 and a pixel defining layer 20, and the pixel defining layer 20 includes a plurality of openings 201. The main display area AA includes a plurality of second sub-pixels 22, the transparent display area BB includes a plurality of first sub-pixels 13, and the first sub-pixels 13 and the second sub-pixels 22 are located in different openings 201 of the pixel defining layer 20. The first subpixel 13 includes a first luminescent material unit 131, an anode 132, and a cathode, and the second subpixel 22 includes a second luminescent material unit 221, an anode 222, and a cathode. It is understood that a portion of the first common electrode 11 covering the first light emitting material unit 131 is a cathode of the first sub-pixel 13, and a portion of the second common electrode 21 covering the second light emitting material unit 221 is a cathode of the second sub-pixel 22. The first subpixel 13 and the second subpixel 22 may be subpixels emitting the same color, or subpixels emitting different colors. The first support 12 located at the second region B2 is located between the adjacent first and second sub-pixels 13 and 22 in the direction X1 in which the main display region AA points to the second region B2. That is, the projection of the first support 12 in the second region B2 is located between the projection of the adjacent first sub-pixel 13 and the projection of the second sub-pixel 22 in the thickness direction of the display panel, that is, the first support 12 in the second region B2 does not overlap with the first sub-pixel 13 in the thickness direction of the display panel 01. It will be appreciated that the first support member 12 in the second region B2 does not overlap with the second sub-pixels 22 in the main display area AA.

In the embodiment of the present application, the first support member 12 in the second region B2 does not overlap with the first sub-pixel 13, and the first support member 12 in the second region B2 does not block the light emitted by the first sub-pixel 13, so as to avoid affecting the display brightness of the transparent display region BB. In the thickness direction of the display panel, the projection of the first support 12 in the second region B2 is located between the projection of the adjacent first sub-pixel 13 and the projection of the second sub-pixel 22, meaning that the first support 12 in the second region B2 is located at the edge of the second region B2 close to the main display region AA. When the first common electrode 11 and the second common electrode 21 are prepared by using the mask plate, the first support member 12 in this embodiment can well support the mask plate at the junction of the main display area AA and the light-transmitting display area BB, and the mask plate is prevented from scratching the functional film layer of the display panel 01.

Fig. 14 is a schematic diagram illustrating a projection position of a first support and a sub-pixel according to the present application.

As shown in FIGS. 13 and 14, in one embodiment of the present application, in the thickness direction of the display panel 01, the minimum distance between the orthographic projection of the first support 12 located in the second region B2 on the plane parallel to the display panel 01 and the orthographic projection of the adjacent first sub-pixel 13 on the plane parallel to the display panel 01 is D1, and D1 ≧ 3 μm; the minimum distance between the orthographic projection of the first support 12 located in the second region B2 on the plane parallel to the display panel and the orthographic projection of the adjacent second sub-pixel 22 on the plane parallel to the display panel 01 is D2, and D2 is ≧ 3 μm.

It is understood that the first common electrode 11 covers the first sub-pixel 13. In one implementation of the embodiment of the present application, as shown in fig. 13, the first common electrode 11 covers both the first support member 12 and the first sub-pixel 13 adjacent thereto in the second region B2. At this time, the minimum distance between the orthographic projection of the first support 12 on the plane parallel to the display panel 01 and the orthographic projection of the adjacent first sub-pixel 13 on the plane parallel to the display panel 01 is not less than 3 μm, so that the first common electrode 11 can be ensured to completely cover the first sub-pixel 13, and the first common electrode 11 can be prevented from being broken.

In another implementation manner of the embodiment of the present application, the first common electrode 11 does not cover the first supporting member 12 in the second region B2, and when the first common electrode 11 is prepared by using a mask plate, the first supporting member 12 provided in the embodiment of the present application can effectively support the shielding portion of the mask plate while ensuring that the first common electrode 11 completely covers the first sub-pixel 13, so as to avoid the mask plate from contacting with the prepared film layer in the display panel 01, thereby avoiding scratching the functional film layer of the display panel 01. It will be appreciated that the second common electrode 21 also does not cover the first support member 12 in the second region B2. When the mask plate is used for preparing the second common electrode 21, the first supporting part 12 provided by the embodiment of the application can effectively support the shielding part of the mask plate while ensuring that the second common electrode 21 completely covers the second sub-pixel 22, so that the mask plate is prevented from contacting with a prepared film layer in the display panel 01, and the functional film layer of the display panel 01 is prevented from being scratched.

Fig. 15 is a partial schematic view of another display panel according to the present application, and fig. 16 is a cross-sectional view taken along line a-a' of fig. 15.

In still another implementation of the embodiment of the present application, as shown in fig. 15 and 16, the first common electrode 11 covers the first sub-pixel 13 and also covers a portion of the first support member 12 adjacent to the first sub-pixel 13. That is, in the first support member 12 located between the adjacent first and second sub-pixels 13 and 22, a portion of the first support member 12 is not covered by the first common electrode 11. When the first common electrode 11 and the second common electrode 21 are prepared using a mask, the shielding portion edge of the mask is located on the first support 12. The first support column 12 provided in this embodiment can effectively support the shielding portion of the mask plate, and prevent the shielding portion of the mask plate from contacting the edge position of the light-transmitting display area BB near the main display area AA, thereby preventing the functional film layer from scratching the edge position of the light-transmitting display area BB near the main display area AA.

In one embodiment provided herein, D1 ═ D2. That is, in the thickness direction of the display panel 01, the minimum distance between the orthographic projection of the first support 12 located in the second region B2 on the plane parallel to the display panel 01 and the orthographic projection of the adjacent first sub-pixel 13 on the plane parallel to the display panel 01 is equal to the minimum distance between the orthographic projection of the first support 12 located in the second region B2 on the plane parallel to the display panel and the orthographic projection of the adjacent second sub-pixel 22 on the plane parallel to the display panel 01.

As shown in fig. 12 and 15, the main display area AA further includes a second supporting member 23, and a minimum distance between a projection of the second supporting member 23 and a projection of the second sub-pixel 22 along a thickness direction of the display panel 01 is not less than 3 μm.

In one embodiment provided by the present application, in the thickness direction of the display panel 01, the shortest distance between the projection of the first support 12 and the projection of the adjacent second sub-pixel 22 in the second region B2 is greater than the shortest distance between the projection of the second support 23 and the projection of the adjacent second sub-pixel 22, and the shortest distance between the projection of the first support 12 and the projection of the adjacent first sub-pixel 13 in the second region B2 is greater than the shortest distance between the projection of the second support 23 and the projection of the adjacent second sub-pixel 22. When the first and second

common electrodes

11 and 21 are prepared using a mask, since the mask is supported using the first support 12 in the second region B2, the mask may scratch the first support 12 located in the second region B2, resulting in the occurrence of impurities in the film layer of the display panel 01. The distance between the first support member 12 in the second region B2 and the adjacent second sub-pixel 22 and first sub-pixel 13 is set to be larger, so that impurities generated by abrasion of the first support member 12 can be effectively prevented from entering the adjacent sub-pixel region, and normal display of the display panel 01 is prevented from being influenced.

Referring to fig. 12, in an embodiment provided in the present application, the plurality of hollow portions 110 include a first hollow portion 110A located in the second area B2, and the first hollow portion 110A at least partially covers the first supporting element 12 along a direction perpendicular to a plane where the display panel 01 is located. That is, in the thickness direction of the display panel 01, the first support 12 at least partially located in the second region B2 overlaps the first hollow portion 110A.

In one embodiment of the present application, the first common electrode 11 includes a portion located at the second region B2, and at least a portion of the first common electrode 11 located at the second region B2 is covered with the first support 12. That is, in the thickness direction of the display panel 01, the first support 12 partially located in the second region B2 is covered by the first common electrode 11.

In yet another embodiment of the present application, with continued reference to fig. 15, at least a portion of the first common electrode 11 located at the second region B2 is covered with a portion of the first support 12. That is, in the thickness direction of the display panel 01, a portion is located in the first support 12 in the second region B2, and a portion of the first support 12 does not overlap with the first common electrode 11.

In the present application, in the thickness direction of the display panel 01, the first support 12 located in the second region B2 is partially covered by the first common electrode 11, and the other portion does not overlap the first common electrode 11. The distribution of the first supporting pieces 12 in the second area B2 can be ensured to be more uniform, when the first common electrode 11 and the second common electrode 21 are prepared by using a mask plate, even if the mask plate is aligned with the display panel 01, the first supporting pieces 12 in the second area B2 can effectively support the mask plate, and the functional film layer of the display panel 01 is prevented from being scratched by the mask plate.

Fig. 17 is a schematic view of a projection position of a first common electrode and a first support member according to the present application, and fig. 18 is a schematic view of another light-transmissive display region according to the present application.

In one embodiment of the present application, in conjunction with fig. 15, 16, and 17, in the thickness direction of the display panel 01, at least a portion of the first support member 12 is not entirely covered by the first common electrode 11. When the first common electrode 11 and the second common electrode 21 are prepared by using a mask, a part of the first support 12 is used to support the shielding portion of the mask, and a part of the first support is located in the hollow area of the mask. That is, there is a portion of the first supporting member 11 that supports the edge region of the shielding portion of the mask, so that the edge region of the shielding portion of the mask is effectively supported, and the mask is prevented from scratching the functional film layer of the display panel 01.

In this application, it should be noted that when the first region B1 includes the first support member 12, and the first region B1 includes the first sub-pixel 13, the first support member 12 and the first sub-pixel 13 do not overlap in the thickness direction of the display panel 01, and the minimum distance between the projection of the first support member 12 and the projection of the first sub-pixel 13 is not less than 3 μm. Alternatively, as shown in fig. 18, the first region B1 includes the first sub-pixel 13, and the second region B2 does not include the first sub-pixel 13.

Fig. 19 is a schematic view of another display panel provided in the embodiment of the present application, fig. 20 is a schematic view of another display panel provided in the embodiment of the present application, and fig. 21 is a partial schematic view of a display panel related to the present application.

The embodiment of the application provides a display panel 01 ', which comprises a main display area AA ' and a light-transmitting display area BB ', wherein the main display area AA ' surrounds at least part of the light-transmitting display area BB '. Note that, as shown in fig. 19, the main display area AA 'may surround the partially transmissive display area BB', or as shown in fig. 20, the main display area AA 'may surround the entire transmissive display area BB'. As shown in fig. 21, the light transmissive display area BB 'includes a plurality of first support members 12' and a plurality of first sub-pixels 13 ', and at least a part of the first sub-pixels 13' are located in the light transmissive display area BB 'near the edge of the main display area AA'. The main display area AA ' includes a plurality of second sub-pixels 22 ', and at least a portion of the second sub-pixels 22 ' are located in the main display area AA ' near an edge of the light-transmissive display area BB '.

Wherein the first support member 12 ' is disposed between at least partially adjacent first and second sub-pixels 13 ', 22 '. That is, along the thickness direction of the display panel 01 ', at least a part of the projection of the adjacent first sub-pixel 13' and the projection of the second sub-pixel 22 'includes the projection of the first support member 12'.

It can be understood that the common electrode of the display panel 01 'is patterned, so that the light transmittance of the light-transmitting display region BB' can be improved. The preparation process of the display panel 01 'common electrode can be an evaporation process, and the preparation of the graphical common electrode of the display panel 01' is realized by combining two mask plates. In order to save the manufacturing cost, a Common Metal Mask (CMM) and a Fine Metal Mask (FMM) are usually used in combination to prepare a patterned common electrode. Since CMMs are typically used to prepare large areas of common electrodes, the cutouts of CMMs are large. The CMM with the larger hollow portion is generally prepared by a single-sided etching method, which causes more burrs to be generated at the edge of the shielding portion in the CMM, so that the shielding portion surrounding the hollow portion is more likely to scratch the functional film layer of the display panel, and particularly, the scratch of the shielding portion located in the transparent display area BB' on the functional film layer of the display panel 01 affects the yield and the display effect of the display panel 01.

In the application, the first supporting member 12 'is disposed between at least part of the adjacent first sub-pixels 13' and the adjacent second sub-pixels 22 ', so that when the mask is used to prepare the patterned common electrode of the display panel 01', the first supporting member 12 'in the application can well support the shielding portion edge of the mask, and the mask is prevented from scratching the functional film layer of the transparent display area BB'. Especially, when the CMM is used for preparing a large-area common electrode, the first support 12 'in the present application can effectively support the blocking portion of the CMM located at the junction of the main display area AA' and the transparent display area BB ', so as to prevent the CMM from scratching the functional film layer at the junction of the main display area AA' and the transparent display area BB ', and effectively improve the yield of the finished product of the display panel 01'.

Referring to fig. 21, in an embodiment of the present application, at least a portion of the first sub-pixels 13 ' has a first supporting member 12 ' disposed between adjacent first sub-pixels 13 '. That is, along the thickness direction of the display panel 01 ', at least a part of the projections of the adjacent first sub-pixels 13 ' includes the projection of the first support member 12 ' therebetween. The embodiment of the present application further increases the density of the first support members 12 ' in the area close to the main display area AA ' in the light-transmissive display area BB '. Therefore, the supporting force of the mask plate is further improved, and the mask plate is prevented from scratching a functional film layer 01' of the display panel.

Fig. 22 is a schematic projection view of a first support and a first sub-pixel according to the present disclosure.

In one embodiment of the present application, as shown in FIG. 22, the minimum distance between the orthographic projection of the first support member 12 ' on the plane parallel to the display panel 01 ' and the orthographic projection of the adjacent first sub-pixel 13 ' on the plane parallel to the display panel 01 ' is D along the thickness direction of the display panel 01 ', wherein D ≧ 3 μm.

In the present application, the first supporting element 12 'is disposed far away from the first sub-pixel 13', so that the first supporting element 12 'does not block the light emitted from the first sub-pixel 13', and the display brightness of the transparent display area BB is not affected. At the same time, it is also ensured that the first sub-pixel 13 'is completely covered by the cathode and that the cathode covering the first sub-pixel 13' is prevented from breaking.

As shown in fig. 23, the display device 001 according to the embodiment of the present application includes the display panel 01/01' according to any one of the embodiments, and the display device 001 according to the embodiment of the present application may be a mobile phone, or the display device 001 according to the embodiment of the present application may be a display device such as a computer or a television.

The display device 001 further includes an optical functional element 02, and the optical functional element 02 is disposed at a position of the display device 001 corresponding to the light-transmitting display region BB/BB 'of the display panel 01/01'. That is, the optical function element 02 is disposed below the light-transmitting display region BB/BB '/of the display panel 01/01' in the thickness direction of the display panel 01. The optical function element 02 may emit light to the light exit surface side of the display panel 01/01 'through the light-transmissive display region BB/BB' or may receive light from the light exit surface side of the display panel 01/01 'through the light-transmissive display region BB/BB'.

The optical functional element 02 is at least one of an optical fingerprint sensor, an iris recognition sensor, a camera and a flashlight.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A display panel, comprising: the display device comprises a main display area and a light-transmitting display area, wherein the main display area surrounds at least part of the light-transmitting display area; the display panel includes:

a first common electrode disposed in the light-transmissive display region, the first common electrode including a plurality of hollow portions;

the second common electrode is arranged in the main display area and is arranged on the whole surface of the main display area;

at least one first support member disposed in the light transmissive display region;

the light-transmitting display area comprises a first area and a second area, the second area at least surrounds part of the first area, and the second area is positioned on one side of the first area close to the main display area; in the thickness direction of the display panel, the sum of the projection areas of the first support members provided in the unit area of the second region is larger than the sum of the projection areas of the first support members provided in the unit area of the first region.

2. The display panel of claim 1, wherein the second region comprises one of the first supports, and wherein the first support at least partially surrounds the first region.

3. The display panel of claim 1, wherein the second region comprises at least two of the first supports, the at least two first supports at least partially surrounding the first region.

4. The display panel according to any one of claims 1 to 3, wherein a center line or a center connection line of a projection of the first support in the second region is in a zigzag shape in a thickness direction of the display panel.

5. The display panel according to claim 1, wherein the main display region includes a plurality of second sub-pixels, and the light-transmissive display region includes a plurality of first sub-pixels; the first support piece located in the second area is located between the adjacent first sub-pixel and the second sub-pixel along the direction in which the main display area points to the second area.

6. The display panel according to claim 5, wherein in the thickness direction of the display panel, the minimum distance between the orthographic projection of the first support in the second region on the plane parallel to the display panel and the orthographic projection of the adjacent first sub-pixel on the plane parallel to the display panel is D1, and D1 ≧ 3 μm; the minimum distance between the orthographic projection of the first support member positioned in the second area on the plane parallel to the display panel and the orthographic projection of the adjacent second sub-pixel on the plane parallel to the display panel is D2, and D2 is more than or equal to 3 mu m.

7. The display panel according to claim 6, wherein D1 is D2.

8. The display panel according to claim 1, wherein the plurality of hollowed-out portions include a first hollowed-out portion located in the second area, and the first hollowed-out portion at least partially covers the first support along a direction perpendicular to a plane of the display panel.

9. The display panel according to claim 1, wherein the first common electrode includes a portion located in the second region, and at least a portion of the first common electrode located in the second region is covered with the first support member.

10. The display panel according to claim 1, wherein at least part of the first support is not completely covered with the first common electrode in a thickness direction of the display panel.

11. A display panel comprising a main display area and a light transmissive display area, the main display area surrounding at least part of the light transmissive display area;

the light transmissive display region includes:

a plurality of first supports;

a plurality of first sub-pixels, at least part of which are positioned in the light-transmitting display area and close to the edge of the main display area;

the main display area includes:

a plurality of second sub-pixels, at least part of which are located in the main display area near the edge of the light-transmitting display area;

wherein the first support member is disposed between at least partially adjacent first and second sub-pixels.

12. The display panel according to claim 11, wherein the first support members are disposed between adjacent first sub-pixels in at least some of the first sub-pixels.

13. The display panel according to claim 11, wherein a minimum distance between an orthographic projection of the first support on a plane parallel to the display panel and an orthographic projection of the adjacent first sub-pixel on the plane parallel to the display panel is D, wherein D is larger than or equal to 3 μm, in the thickness direction of the display panel.

14. A display device comprising the display panel according to any one of claims 1 to 13 and an optical functional element; the optical functional element is arranged at the position of the display device corresponding to the light-transmitting display area.

15. The display device of claim 14, wherein the optical functional element is at least one of an optical fingerprint sensor, an iris recognition sensor, a camera, a flashlight.