Display panel and method for manufacturing the same

Abstract

To provide a display panel and a method for manufacturing the same that effectively improves touch performance.SOLUTION: A display panel includes a substrate 10, and a signal shielding layer 12, a protective layer 13, and an isolation structure 11 sequentially arranged on the substrate 10, wherein the isolation structure 11 defines a plurality of first isolation openings K1 and a plurality of second isolation openings K2, the display panel includes a plurality of light-emitting elements Q including a light-emitting functional layer Q1, the light-emitting functional layer Q1 is disposed in the first isolation opening K1. In the substrate 10, orthogonal projections of the signal shielding layer 12 and the protective layer 13 cover an orthogonal projection of the second isolation opening K2. Therefore, a region where the second isolation opening K2 is located can be used as a light-transmitting hole region, and the interference of the touch signal caused by the touch electrode layer can be effectively shielded by the signal shielding layer 12, and the signal shielding layer 12 can be protected by the protective layer 13 to avoid damage to the signal shielding layer 12 during the manufacturing process and to avoid loss of shielding.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to the field of display technology, and more particularly to a display panel and a method for manufacturing the display panel.

Background Art

[0002] With the development of touch technology and display technology, display panels have been attracting more and more attention. Taking a general touch-control type smart mobile terminal as an example, its screen occupancy rate has been increasing gradually, providing users with a visual experience far superior to that of the past.

[0003] However, in reality, the problem of signal crosstalk is likely to occur in the display panel, resulting in poor touch performance.

Summary of the Invention

Problems to be Solved by the Invention

[0004] In view of this, the present invention provides a display panel, a method for manufacturing the display panel, and a display device, which can effectively reduce signal interference and improve touch performance.

Means for Solving the Problems

[0005] A first aspect of an embodiment of the present invention provides a display panel. The display panel includes a substrate, a signal shielding layer, a protection layer, and an isolation structure sequentially disposed on the substrate. The isolation structure defines a plurality of first isolation openings and a plurality of second isolation openings. The display panel further includes a plurality of light-emitting elements, the light-emitting elements include a light-emitting functional layer, the light-emitting functional layer is provided in the first isolation openings, a positive projection of the signal shielding layer on the substrate covers a positive projection of the second isolation openings, and a positive projection of the protection layer on the substrate covers a positive projection of the second isolation openings.

[0006] Optionally, the protective layer includes a protection portion, the protection portion defines a plurality of first openings, the first openings communicate with the first isolation opening, and are used for installing the light-emitting functional layer. The protection portion is located on the side of the signal shielding layer facing away from the substrate, and the orthographic projection of the protection portion on the substrate covers the orthographic projection of the signal shielding layer.

[0007] Optionally, the signal shielding layer includes a plurality of signal shielding portions installed separately, and the isolation structure is electrically connected to the plurality of signal shielding portions.

[0008] Optionally, the protection portion has a plurality of first through holes, and the isolation structure contacts the signal shielding portion through the first through holes.

[0009] Optionally, the protective layer includes a plurality of protection portions installed separately, the signal shielding layer includes a plurality of signal shielding portions installed separately, the isolation structure is electrically connected to the plurality of signal shielding portions, and the plurality of protection portions installed separately are respectively located on the side of the plurality of signal shielding portions facing away from the substrate.

[0010] Optionally, on the substrate, the orthographic projection of the signal shielding portion covers the orthographic projection of the protection portion, and the portion of the orthographic projection of the signal shielding portion protruding from the orthographic projection of the protection portion on the substrate is in direct contact with the isolation structure.

[0011] Optionally, on the substrate, the orthographic projection of the protection portion covers the orthographic projection of the signal shielding portion, the protection portion has a first through hole, and the isolation structure contacts the signal shielding portion through the first through hole.

[0012] Optionally, the display panel further includes a first insulating layer located on the side of the signal shielding layer close to the substrate. The first insulating layer includes an insulating portion and a plurality of pixel openings defined by the insulating portion. The pixel openings communicate with the first isolation opening and are used for installing the light-emitting functional layer of the light-emitting element. Optionally, the light-emitting element further includes a first electrode located on the side of the light-emitting functional layer closer to the substrate, and the pixel aperture exposes at least a partial region of the first electrode. Optionally, the first insulating layer includes a pixel defining layer.

[0013] Optionally, the display panel includes a display region and a border region surrounding the display region. The border region includes a lower border region. The isolation structure is located in the display region and at least a part of the lower border region. The protective layer located in the lower border region further has a second through hole. The first insulating layer located in the lower border region has a third through hole. The second through hole and the third through hole communicate with each other. The isolation structure located in the lower border region is superposed and joined to a ground terminal through the second through hole and the third through hole.

[0014] Optionally, the border region further includes a peripheral region other than the lower border region. The signal shielding layer further includes a shielding structure located in the peripheral region. The shielding structure defines a plurality of shielding openings. On the substrate, the orthographic projection of the shielding structure located in the peripheral region and the orthographic projection of the first electrode located in the peripheral region cover the orthographic projection of the peripheral region.

[0015] Optionally, the insulating portion located in the peripheral region further has a plurality of insulating openings. The shielding openings communicate with the insulating openings and expose the first electrode located in the peripheral region.

[0016] Optionally, the first electrode located in the peripheral region defines a plurality of electrode openings. The first insulating layer located in the peripheral region covers the plurality of electrode openings. On the substrate, the orthographic projection of the shielding structure covers the orthographic projection of the plurality of electrode openings.

[0017] Optionally, the first electrode located in the peripheral region is superposed and joined to the ground terminal. The shielding structure extends to the display region and is electrically connected to the isolation structure.

[0018] Optionally, the light-emitting element further includes a second electrode located on a side of the light-emitting functional layer facing away from the substrate, and the second electrode is located within the first isolation opening and is overlapped and joined to a sidewall of the isolation structure.

[0019] Optionally, the display panel further includes a first encapsulation layer located on a side of the second electrode facing away from the substrate, and a second encapsulation layer located on a side of the first encapsulation layer facing away from the substrate. The first encapsulation layer includes a first encapsulation portion and a plurality of second openings defined by the first encapsulation portion. A positive projection of the first encapsulation portion on the substrate covers a positive projection of the second electrode. The second openings communicate with the second isolation openings, and a positive projection of the second openings on the substrate covers a positive projection of the second isolation openings. A positive projection of the second encapsulation layer on the substrate covers the substrate.

[0020] According to a second aspect, an embodiment of the present invention further provides a method for manufacturing a display panel. The method for manufacturing a display panel includes the steps of providing a substrate, sequentially forming a signal shielding layer and an inorganic material layer on the substrate, etching the inorganic material layer to form an inorganic film layer, forming an isolation structure on the inorganic film layer, and etching the inorganic film layer to form a protective layer. The isolation structure defines a plurality of first isolation openings and a plurality of second isolation openings. The plurality of first isolation openings are used for installing light-emitting functional layers of a plurality of light-emitting elements. A positive projection of the signal shielding layer on the substrate covers a positive projection of the second isolation openings, and a positive projection of the protective layer on the substrate covers a positive projection of the second isolation openings.

[0021] Optionally, the step of sequentially forming a signal shielding layer and an inorganic material layer on the substrate includes the steps of forming an insulating material layer on the substrate, and sequentially forming the signal shielding layer and the inorganic material layer on the insulating material layer.

[0022] Optionally, the step of etching the inorganic material layer to form an inorganic film layer includes: etching the inorganic material layer in the display area to form a first through hole; etching the inorganic material layer in the frame area to form a second through hole to obtain the inorganic film layer; and etching an insulating material layer in the frame area to form a third through hole to obtain an insulating film layer. The second through hole and the third through hole communicate with each other.

[0023] Optionally, the frame area includes a lower frame area. The step of forming an isolation structure on the inorganic film layer and etching the inorganic film layer to form a protective layer includes: forming an isolation structure on the inorganic film layer, wherein the isolation structure located in the display area is superposed and joined to the signal shielding layer through the first through hole, and the isolation structure located in the lower frame area is superposed and connected to the ground terminal through the second through hole and the third through hole; and etching the insulating film layer and the inorganic film layer in the first isolation opening to form a first insulating layer and the protective layer.

[0024] A third aspect of an embodiment of the present invention provides a display device. The display device includes the display panel described in the first aspect of the embodiment of the present invention.

Advantages of the Invention

[0025] In the solution means of the present invention, the display panel includes a substrate, a signal shielding layer, a protection layer, and an isolation structure sequentially disposed on the substrate. The isolation structure defines a plurality of first isolation openings and a plurality of second isolation openings. The display panel further includes a plurality of light-emitting elements. The light-emitting elements include a light-emitting functional layer. The light-emitting functional layer is provided in the first isolation openings. The orthographic projection of the signal shielding layer on the substrate covers the orthographic projection of the second isolation openings. The orthographic projection of the protection layer on the substrate covers the orthographic projection of the second isolation openings. In this way, the region where the second isolation openings are located can be used as a light-transmitting hole region, and the interference of the touch signal by the touch electrode layer can be effectively shielded by the signal shielding layer. Also, by protecting the signal shielding layer with the protection layer, damage to the signal shielding layer during the manufacturing process can be avoided, and the shielding can be prevented from becoming ineffective. Thereby, the touch performance of the display panel can be effectively improved.

Brief Description of the Drawings

[0026] To make the above or other objects, configurations, and advantages of the present invention clearer, the embodiments of the present invention will be described in more detail with reference to the drawings. The drawings are used to provide a further understanding of the embodiments of the present invention, constitute a part of this specification, and are used to explain the present invention together with the embodiments of the present invention, and do not limit the present invention. In the drawings, the same reference numerals generally indicate the same components or steps.

[0027]

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Embodiments for Carrying Out the Invention

[0028] Unless otherwise defined, technical terms or scientific terms used in the embodiments of this specification should have the general meaning that can be understood by those skilled in the art to which this specification belongs. The "first", "second" and similar terms used in the embodiments of this specification do not indicate any order, quantity or importance at all, and are only used to avoid confusion of components.

[0029] Unless otherwise required by the context, throughout the specification, "a plurality" indicates "at least two", and "comprising" is construed as "including openly", that is, "including but not limited to these". In the description of this specification, terms such as "an embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples" or "some examples" are used to indicate that specific configurations, structures, materials or characteristics related to the embodiment or example are included in at least one embodiment or exemplification of this specification. The exemplary expressions of the above terms do not necessarily indicate the same embodiment or exemplification.

[0030] Hereinafter, with reference to the drawings in the embodiments of this specification, the technical solutions in the embodiments of this specification will be clearly and completely described. Needless to say, the described embodiments are only some embodiments of this specification, not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative labor also fall within the protection scope of this specification.

[0031] In the manufacturing process of the display panel, as shown in FIG. 1, pixel-level encapsulation means are used for the light-emitting pixels F, that is, each light-emitting pixel F is encapsulated individually. Therefore, there are intervals between the light-emitting pixels F, and the cathode 00 of the light-emitting pixel F is not covered within the intervals. Due to the needs of screen fingerprint authentication and environmental light transmission, it is necessary to perform a cutout design on the display area. Therefore, the aperture W formed by the cutout causes a crosstalk problem between the array signal S and the touch signal TP. When the crosstalk becomes serious, it will even affect the touch performance of the product. Therefore, the solution to the problem of signal crosstalk has attracted people's attention.

[0032] Therefore, the present invention provides a solution that can effectively reduce signal interference and improve touch performance. By adding a signal shielding layer to the area corresponding to the aperture, the signal shielding layer can be used to effectively shield the interference of the touch electrode layer on the touch signal. In addition, by adding a protective film layer on the signal shielding layer, damage to the signal shielding layer caused by processes such as etching in the manufacturing process can be effectively avoided, preventing the shielding from failing, and effectively improving the touch performance of the display panel.

[0033] Patents PCT / CN2023 / 134518, 202310759370.2, 202310740412.8, and 202310707209.0 describe related technical solutions for isolation structures, the content of which is incorporated into the present invention by reference for reference purposes.

[0034] Specifically, an embodiment of the present invention provides a display panel as one implementation manner. FIG. 2 is a schematic plan view of the planar structure of a display panel according to an embodiment of the present invention, and FIG. 3 is a schematic cross-sectional view of the display panel shown in FIG. 2 cut along the cutting line AA'. As shown in FIGS. 2 and 3, the display panel can include at least a substrate 10, an isolation structure 11, a signal shielding layer 12, and a protective layer 13 sequentially disposed on the substrate 10.

[0035] The substrate 10 mainly functions to support and bear loads, etc. Specifically, the substrate 10 may be a rigid substrate such as a glass substrate or a silicon substrate, or may be a flexible substrate such as stainless (abbreviated as SUS) or flexible polyimide (abbreviated as PI). That is, the display panel in the embodiment of the present invention may be a non-foldable rigid display panel or a foldable flexible display panel.

[0036] The isolation structure 11 defines a plurality of first isolation openings K1 and a plurality of second isolation openings K2, and the plurality of first isolation openings K1 are used for installing the light-emitting functional layer Q1 of the plurality of light-emitting elements Q.

[0037] The numbers of the first isolation opening K1 and the second isolation opening K2 may be set according to actual needs and are not particularly limited herein.

[0038] Thereby, the light-emitting functional layer Q1 of each light-emitting element Q can be separated and blocked by using the isolation structure 11, and independent light-emitting pixels can be obtained. In addition, the second isolation opening K2 serves as a light transmission hole to provide a light transmission path for in-screen fingerprint authentication and ambient light.

[0039] Accordingly, the region where the second isolation opening K2 is located may be a light transmission hole region. In order to avoid crosstalk between the touch signal and the array signal due to the existence of the light transmission hole region, the orthographic projection of the signal shielding layer 12 on the substrate may be installed to cover the orthographic projection of the second isolation opening K2 on the substrate. In this way, the light transmission needs are satisfied by the second isolation opening K2, crosstalk between the touch signal and the array signal is avoided due to the existence of the signal shielding layer 12, and the signal shielding layer 12 satisfies a predetermined light transmittance requirement.

[0040] In addition, the inventor has found through research that in the manufacturing process of the display panel, forming the isolation structure 11 requires a two-step etching process (including dry etching and wet etching), but this two-step etching process is likely to cause great damage to the signal shielding layer 12 and cause the shielding function to fail. In view of this, the orthographic projection of the protective layer 13 on the substrate may be installed to cover the orthographic projection of the second isolation opening K2 on the substrate. Thereby, the signal shielding layer 12 can be protected by the protective layer 13, damage caused by the etching process in the display panel manufacturing process can be avoided, the shielding effect of the signal shielding layer 12 can be guaranteed, and thereby the touch performance of the display panel can be effectively improved.

[0041] In some embodiments, as shown in FIG. 4, the protective layer 13 may include a protection portion 13a, and the protection portion 13a may define a plurality of first openings K3.

[0042] The first opening K3 communicates with the first isolation opening K1 and is used for installing the light-emitting functional layer Q1 of the light-emitting element Q.

[0043] The protection part 13a is located on the side of the substrate 10 of the signal shielding layer 12 facing away from the substrate 10, and the orthographic projection of the protection part 13a on the substrate 10 covers the orthographic projection of the signal shielding layer 12 on the substrate 10.

[0044] Note that on the substrate 10, the orthographic projection of the protection part 13a covers the orthographic projection of the signal shielding layer 12, that is, the protection part 13a covers the signal shielding layer 12, thereby avoiding the second isolation opening K2 from exposing at least a part of the signal shielding layer 12 and playing a role in protecting the signal shielding layer 12. Further, by performing a punching (first opening K3) design on the protection layer 13, the thickness uniformity of the protection layer 13 in the direction perpendicular to the substrate 10 in the region other than the first opening K3 region can be guaranteed, and the complexity of manufacturing the display panel can be reduced.

[0045] In some embodiments, the signal shielding layer 12 may include a plurality of signal shielding parts 12a that are installed separately. The isolation structure 11 is electrically connected to the plurality of signal shielding parts 12a that are installed separately, thereby realizing the electrical connection between the plurality of signal shielding parts 12a and building a structural basis for realizing the signal shielding effect by the signal shielding layer 12.

[0046] Note that since the orthographic projection of the signal shielding layer 12 on the substrate 10 covers the orthographic projection of the second isolation opening K2, when the plurality of signal shielding parts 12a that are installed separately are electrically connected through the isolation structure 11, a signal shielding function can be provided in the light-transmitting hole region where all the second isolation openings K2 are located, improving the light transmittance and enhancing the signal shielding effect.

[0047] In order to ensure the electrical connection between the isolation structure 11 and the signal shielding part 12a, in some embodiments, as shown in FIG. 4, the protection part 13a may have a plurality of first through holes Z1, and the isolation structure 11 may be in contact with the signal shielding part 12a through the first through holes Z1.

[0048] Of course, the present invention is not limited thereto. In some embodiments, as shown in FIGS. 5 and 6, the protection layer 13 may include a plurality of protection portions 13a that are separately installed.

[0049] The signal shielding layer 12 may include a plurality of signal shielding portions 12a that are separately installed. The isolation structure 11 is electrically connected to the plurality of signal shielding portions 12a.

[0050] In order to avoid the second isolation opening K2 from exposing the signal shielding portion 12a and making the signal shielding portion 12a easily damaged, each of the plurality of protection portions 13a that are separately installed may be located on the side facing away from the substrate 10 of the plurality of signal shielding portions 12a that are separately installed. In this way, a corresponding protection portion 13a is installed on the side facing away from the substrate 10 of each signal shielding portion 12a. On the substrate 10, the orthographic projection of the protection portion 13a covers the orthographic projection of the second isolation opening K2 at the corresponding position, thereby avoiding damage to the signal shielding portion 12a during the manufacturing process of the display panel.

[0051] In this embodiment, by installing a plurality of signal shielding portions 12a, signal shielding for a plurality of different positions can be realized according to the signal shielding needs at different positions. Compared with a signal shielding layer that covers the entire surface, the shielding material can be saved and the manufacturing cost can be reduced.

[0052] Similarly, by installing a plurality of protection portions 13a, a plurality of signal shielding portions 12a at different positions can be protected respectively, ensuring the touch performance while saving the protection material and further reducing the manufacturing cost.

[0053] Specifically, when implementing, as shown in FIG. 6, the orthographic projection of the signal shielding portion 12a on the substrate 10 covers the orthographic projection of the protection portion 13a on the substrate 10, and the portion of the orthographic projection of the signal shielding portion 12a on the substrate 10 that protrudes from the orthographic projection of the protection portion 13a on the substrate 10 is in direct contact with the isolation structure 11.

[0054] In some embodiments, as shown in FIG. 4, the orthographic projection of the protection part 13a on the substrate 10 covers the orthographic projection of the signal shielding part 12a. The protection part 13a has a first through hole Z1, and the isolation structure 11 contacts the signal shielding part 12a through the first through hole Z1.

[0055] In some embodiments, as shown in FIG. 7, the display panel may further include a first insulating layer 14 located on the side of the signal shielding layer 12 close to the substrate 10. The first insulating layer 14 may include an insulating part 14a and a plurality of pixel openings 14b defined by the insulating part 14a. The material of the insulating part 14a may be an organic insulating material or an inorganic insulating material.

[0056] When implemented, the pixel opening 14b communicates with the first isolation opening K1 and is used for installing the light-emitting functional layer Q1 of the light-emitting element Q. Specifically, the position of the light-emitting layer in the light-emitting functional layer Q1 can be better restricted by the pixel opening 14b.

[0057] In some embodiments, as shown in FIG. 7, the light-emitting element Q may further include a first electrode Q2 located on the side of the light-emitting functional layer Q1 close to the substrate 10. The pixel opening 14b exposes at least a part of the region of the first electrode Q2.

[0058] The first insulating layer 14 can insulate between the first electrode Q2 and the isolation structure 11 due to its insulating property. Also, since the area of the region where the first electrode Q2 of the light-emitting element Q is exposed by the pixel opening 14b is the light-emitting area of the light-emitting element Q, the light-emitting area can be better restricted by the pixel opening 14b of the first insulating layer 14.

[0059] When applied, the first insulating layer 14 includes a pixel defining layer.

[0060] It should be noted that the installation of the first insulating layer 14 and the installation of the protection layer 13 can utilize the same hole-opening process design, without the need to add a mask during the manufacturing process, which can save manufacturing costs, simplify the manufacturing process, and improve manufacturing efficiency.

[0061] In some embodiments, as shown in FIG. 7, the light-emitting element Q further includes a second electrode Q3 located on the side of the light-emitting functional layer Q1 facing away from the substrate 10. The second electrode Q3 is located within the first isolation opening K1, and the second electrode Q3 is superposed and joined to the side wall of the isolation structure 11.

[0062] Specifically, the light-emitting functional layer Q1 may include a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, and an electron injection layer sequentially laminated on the side of the first electrode Q2 facing away from the substrate 10. A second electrode Q3 is provided on the side of the electron injection layer facing away from the substrate 10.

[0063] Here, the light-emitting layer may include a material having electroluminescence (EL) performance (hereinafter abbreviated as a light-emitting material). The first electrode is also called an anode and is used to provide holes to the light-emitting layer. The second electrode is also called a cathode and is used to provide electrons to the light-emitting layer. Holes from the first electrode and electrons from the second electrode can be combined in the light-emitting layer and then excite the light-emitting material of the light-emitting layer to emit light. The hole injection layer and the hole transport layer can be manufactured with materials having a high hole mobility, so that holes generated at the first electrode can be transported to the light-emitting layer more favorably. Similarly, the electron injection layer and the electron transport layer can be manufactured with materials having a high electron mobility, so that electrons generated at the second electrode can be transported to the light-emitting layer more favorably.

[0064] Note that the second electrode Q3 is superposed and joined to the isolation structure 11, that is, the signal shielding layer 12 is electrically connected to the second electrode Q3 through the isolation structure 11. Therefore, the signal shielding layer 12, the isolation structure 11, and the second electrode Q3 can form a comprehensive potential layer for signal shielding. The region corresponding to the first isolation opening K1 realizes signal shielding by the second electrode Q3, and the region corresponding to the second isolation opening K2 realizes signal shielding by the signal shielding layer 12. This avoids the occurrence of the signal crosstalk problem and improves the touch performance.

[0065] In some embodiments, as shown in FIG. 8, the display panel may include a display area AA and a frame area BB surrounding the display area AA. The frame area BB may include a lower frame area BB1. When implemented, the lower frame area BB1 may refer to the area of the frame area BB closest to the binding area.

[0066] As shown in FIG. 9, the isolation structure 11 is located at least in part in the display area AA and the lower frame area BB1.

[0067] The protective layer 13 located in the lower frame area BB1 may further have a second through hole Z2, and the first insulating layer 14 located in the lower frame area BB1 may have a third through hole Z3. The second through hole Z2 and the third through hole Z3 communicate with each other. The isolation structure 11 located in the lower frame area BB1 is overlapped and joined to the ground terminal M through the second through hole Z2 and the third through hole Z3.

[0068] The ground terminal M may be a metal layer connected to the ground signal. The metal layer is located on the side of the first insulating layer 14 close to the substrate 10, and its specific position can be set according to actual needs. For example, it can be installed between the first planarization layer and the second planarization layer.

[0069] The isolation structure 11 is overlapped and joined to the ground terminal M and can receive the ground signal, thereby realizing the signal shielding function of the isolation structure 11, the second electrode Q3 connected to the isolation structure 11, and the signal shielding layer 12 connected to the isolation structure 11.

[0070] In some embodiments, as shown in FIG. 8, the frame area BB may further include a peripheral area BB2 other than the lower frame area BB1. In order to ensure the reliability of the display panel, generally, the isolation structure 11 is not installed in the peripheral area BB2. Therefore, the peripheral area BB2 cannot construct a signal shielding structure that covers the entire peripheral area BB2 by the isolation structure 11.

[0071] To ensure the signal shielding effect of the peripheral region BB2, as shown in FIG. 10, the signal shielding layer 12 may further include a shielding structure 12b located in the peripheral region BB2, and the shielding structure 12b defines a plurality of shielding openings K4. To avoid the occurrence of signal crosstalk problems in the region corresponding to the shielding opening K4, the orthographic projections of the shielding structure 12b located in the peripheral region BB1 and the first electrode Q2 on the substrate 10 cover the orthographic projection of the substrate 10 in the peripheral region BB1. Thereby, a signal shielding structure covering the peripheral region BB1 can be formed by using the shielding structure 12b and the first electrode Q2, and the signal shielding function of the peripheral region BB1 can be realized.

[0072] In some embodiments, the insulating portion 14a located in the peripheral region may further have a plurality of insulating openings 14c. The shielding opening K4 communicates with the insulating opening 14c located in the peripheral region BB2 and exposes the first electrode Q2 located in the peripheral region BB2.

[0073] When implemented, on the substrate 10, the orthographic projections of the shielding structure 12b and the plurality of shielding openings K4 may cover the orthographic projection of the peripheral region BB2. Specifically, the shielding structure 12b can realize signal shielding in the corresponding region, and by installing a plurality of shielding openings K4, the water vapor inside the display panel can be released, and the performance of the display panel can be improved.

[0074] Specifically, the first electrode Q2 located in the peripheral region BB1 is superposed and joined to the ground end, whereby the first electrode Q2 located in the peripheral region BB1 has a signal shielding function.

[0075] As shown in FIG. 10, the shielding structure 12b located in the peripheral region BB1 may extend into the display region AA and be electrically connected to the isolation structure 11. Specifically, the portion of the isolation structure 11 close to the peripheral region BB1 is superposed and connected to the shielding structure 12b through the first through hole Z1 of the protection portion 13a, and the signal shielding function of the shielding structure 12b can be realized.

[0076] In some embodiments, as shown in FIG. 10, the first electrode Q2 located in the peripheral region BB2 defines a plurality of electrode openings K5, and the first insulating layer 14 located in the peripheral region BB2 covers the plurality of electrode openings K5. The orthographic projection of the shielding structure 12b on the substrate 10 covers the orthographic projection of the plurality of electrode openings K5 on the substrate 10.

[0077] When implemented, the first electrode Q2 located in the peripheral region may be a full-surface electrode covering the peripheral region BB2, and in this case, electrode openings K5 are formed so as to release water vapor in the organic film layer of the display panel. Also, on the substrate 10, the orthographic projection of the shielding structure 12b covers the orthographic projection of the plurality of electrode openings K5, thereby avoiding the signal crosstalk problem in the region corresponding to the electrode openings K5. In this way, by misdrilling holes in the two-layer metal film layer of the shielding structure 12b and the first electrode Q2 located in the peripheral region BB2, overall signal shielding of the peripheral region BB2 can be achieved, and the occurrence of the signal crosstalk problem can be avoided.

[0078] In some embodiments, as shown in FIG. 11, the display panel may further include a first sealing layer 15 located on the side of the substrate 10 facing away from the second electrode Q3, and a second sealing layer 16 located on the side of the first sealing layer 15 facing away from the substrate 10.

[0079] The first sealing layer 15 includes a first sealing portion 15a and a plurality of second openings K6 defined by the first sealing portion 15a, and the orthographic projection of the first sealing portion 15a on the substrate 10 covers the orthographic projection of the second electrode Q3. Thereby, each light-emitting pixel can be individually sealed using the first sealing portion 15a.

[0080] When applied, the first sealing portion 15a can be formed by combining chemical vapor deposition (CVD) and etching. The material of the first sealing portion 15a may be an inorganic insulating material.

[0081] Of course, the present invention is not limited to this. In some other embodiments, the material of the first sealing layer 15 may be an organic insulating material. Specifically, it can be installed according to actual sealing requirements and technical needs.

[0082] As shown in FIG. 11, the second opening K6 and the second isolation opening K2 communicate with each other. On the substrate 10, the orthographic projection of the second opening K6 covers the orthographic projection of the second isolation opening K2. Thereby, the second opening K6 exposes the second isolation opening K2, and at least a part of the region of the protective layer 13 is exposed.

[0083] The orthographic projection of the second sealing layer 16 on the substrate 10 covers the substrate 10, that is, the second sealing layer 16 covers not only the first sealing portion 15a but also the second opening K6.

[0084] Specifically, the second sealing layer 16 may be an organic sealing thin film formed by an inkjet printing method.

[0085] It should be noted that the organic sealing thin film is likely to peel off when it comes into contact with metal, that is, the organic sealing thin film is likely to peel off when it comes into contact with the signal shielding layer 12. In contrast, in the embodiment of the present invention, in the second isolation opening K2, the protective layer 13 can block the direct contact between the organic sealing thin film and the signal shielding layer 12. Therefore, the risk of peeling of the organic sealing thin film is reduced, and the effectiveness of the sealing is improved.

[0086] In some embodiments, as shown in FIG. 11, the display panel may further include a third sealing layer 17 located on the side facing away from the substrate 10 of the second sealing layer 16. The orthographic projection of the third sealing layer 17 on the substrate 10 covers the substrate 10.

[0087] When applied, the first sealing layer 15 and the third sealing layer 17 may be made of an inorganic material, and the second sealing layer 16 may be made of an organic material. The second sealing layer 16 made of an organic material is located between the first sealing layer 15 and the third sealing layer 17 made of an inorganic material, and can form a sealing structure. The sealing structure can better block water and oxygen and achieve a sealing effect.

[0088] To realize the touch function of the display panel, as shown in FIG. 11, the display panel may further include a touch electrode layer 18 located on the side facing away from the substrate 10 of the sealing structure.

[0089] In some embodiments, the display panel may include a display area and a non-display area.

[0090] The protective layer 13 has a second through hole in the non-display area, the first insulating layer 14 has a third through hole in the non-display area, and the second through hole and the third through hole communicate with each other. The isolation structure 11 is overlapped and joined to the ground end through the second through hole and the third through hole, thereby ensuring the shielding effect of the signal shielding layer 12 in contact with the isolation structure 11.

[0091] As another embodiment of the present invention, a method for manufacturing a display panel is further provided. As shown in FIG. 12, the method for manufacturing a display panel may include at least the following steps.

[0092] In S1201, a substrate is provided.

[0093] In S1202, a signal shielding layer and an inorganic material layer are sequentially formed on the substrate.

[0094] In S1203, the inorganic material layer is etched to form an inorganic film layer.

[0095] In S1204, an isolation structure is formed on the inorganic film layer and the inorganic film layer is etched to form a protective layer. The isolation structure defines a plurality of first isolation openings and a plurality of second isolation openings. The plurality of first isolation openings are used for installing the light-emitting functional layers of the plurality of light-emitting elements. The orthographic projection of the signal shielding layer on the substrate covers the orthographic projection of the second isolation opening, and the orthographic projection of the protective layer on the substrate covers the orthographic projection of the second isolation opening.

[0096] The display panel manufactured according to an embodiment of the present invention includes a substrate, a signal shielding layer, a protection layer, and an isolation structure sequentially disposed on the substrate. The isolation structure defines a plurality of first isolation openings and a plurality of second isolation openings. The plurality of first isolation openings are used for installing the light-emitting functional layers of the plurality of light-emitting elements. The orthographic projection of the signal shielding layer on the substrate covers the orthographic projection of the second isolation openings, and the orthographic projection of the protection layer on the substrate covers the orthographic projection of the second isolation openings. In this way, the region where the second isolation openings are located can be used as a light-transmitting hole region, and the interference of the touch signal by the touch electrode layer can be effectively shielded by the signal shielding layer. Also, by protecting the signal shielding layer with the protection layer, damage to the signal shielding layer during the manufacturing process can be avoided, and the shielding failure can be avoided. Thereby, the touch performance of the display panel can be effectively improved.

[0097] In some embodiments, step S1202 may specifically include forming an insulating material layer on the substrate, and sequentially forming a signal shielding layer and an inorganic material layer on the insulating material layer.

[0098] Specifically, as shown in FIG. 13, after forming an insulating material layer 141 on the substrate 10, a metal material layer is manufactured on the insulating material layer, and the signal shielding layer 12 is formed by patterning the metal material layer. Further, an inorganic material layer 131 is formed on the signal shielding layer 12.

[0099] Accordingly, in the above step S1203, as shown in FIG. 14, the inorganic material layer 131 is etched in the display area AA to form a first through hole Z1, and the inorganic material layer 131 is etched in the frame area BB to form a second through hole Z2 to obtain an inorganic film layer 132. The insulating material layer 141 is etched in the frame area to form a third through hole Z3 to obtain an insulating film layer 142. The second through hole Z2 and the third through hole Z3 communicate with each other.

[0100] The frame area BB includes a lower frame area. Accordingly, as shown in FIG. 15, in step S1204, the isolation structure 11 is formed on the inorganic film layer 132, and the isolation structure 11 located in the display area is superposed and joined to the signal shielding layer 12 through the first through hole Z1. As shown in FIG. 16, the isolation structure 11 located in the lower frame area BB1 is superposed and joined to the ground terminal M through the second through hole Z2 and the third through hole Z3. Further, as shown in FIG. 17, the insulating film layer 142 and the inorganic film layer 132 in the first isolation opening K1 may be etched to form the first insulating layer 14 and the protective layer 13.

[0101] The first insulating layer may include a pixel defining layer.

[0102] In an embodiment of the present invention, after forming the insulating material layer, a signal shielding layer and an inorganic material layer are further added, and the first insulating layer and the protective layer can be respectively formed by a similar etching process. Among them, there is no need to separately add a mask to add the protective layer, which can save manufacturing costs, simplify the manufacturing process, and improve manufacturing efficiency. In addition, the installation of the signal shielding layer and the protective layer can improve the touch performance of the display panel and improve the product yield.

[0103] For the structure of each layer of the display panel obtained by the manufacturing method and the corresponding description, refer to the corresponding description in the display panel as described above.

[0104] As an alternative embodiment of the disclosure of the present invention, a display device is further provided. The display device includes the display panel according to any one of the above embodiments. Referring to FIG. 18, FIG. 18 is a structural schematic diagram of a display device according to an embodiment of the present invention. The display device may be a smartphone, or may be a tablet computer or a digital camera, etc., and the description thereof is omitted here.

[0105] Each example in this specification is described progressively, each example highlighting the differences from other examples, and the same or similar parts between each example may be referred to each other.

[0106] Based on the above description of the described examples, those skilled in the art can implement or use the present invention. Various modifications to these examples will be obvious to those skilled in the art. The general principles defined in this specification can be implemented in other examples as well, as long as they do not depart from the spirit or scope of the present invention. Therefore, the present invention is not limited to these examples shown in this specification, but conforms to the broadest scope consistent with the principles and novel features described in this specification.

Claims

1. A display panel, The present invention includes a substrate, a signal shielding layer, a protective layer, and an isolation structure disposed on the substrate in this order; the isolation structure defines a plurality of first isolation openings and a plurality of second isolation openings; The display panel further includes a plurality of light-emitting elements, the light-emitting elements including a light-emitting functional layer, and the light-emitting functional layer is disposed in the first isolation opening; On the substrate, an orthogonal projection of the signal shielding layer covers an orthogonal projection of the second isolation opening, and on the substrate, an orthogonal projection of the protection layer covers an orthogonal projection of the second isolation opening. A display panel characterized by:

2. The protective layer includes a protective portion, the protective portion defines a plurality of first openings; the first opening communicates with the first isolation opening and is used for disposing the light emitting functional layer; the protective portion is located on a side of the signal shielding layer facing away from the substrate, and on the substrate, an orthogonal projection of the protective portion covers an orthogonal projection of the signal shielding layer; 2. The display panel according to claim 1 .

3. The signal shielding layer includes a plurality of signal shielding portions spaced apart from each other, the isolation structure is electrically connected to the plurality of signal shields; 3. The display panel according to claim 2.

4. The protection portion has a plurality of first through holes, the isolation structure contacts the signal shielding portion through the first through hole; 4. The display panel according to claim 3.

5. The protective layer includes a plurality of protective portions disposed at a distance from each other, the signal shielding layer includes a plurality of signal shielding portions spaced apart from each other, the isolation structure being electrically connected to the plurality of signal shielding portions; The plurality of protective portions are disposed on the side of the plurality of signal shielding portions that are disposed at a distance from each other, the side facing away from the substrate.

2. The display panel according to claim 1 .

6. On the substrate, an orthogonal projection of the signal shielding portion covers an orthogonal projection of the protection portion; a portion of the signal shielding portion where an orthogonal projection on the substrate extends beyond an orthogonal projection of the protection portion on the substrate directly contacts the isolation structure; 6. The display panel according to claim 5.

7. In the substrate, an orthogonal projection of the protection portion covers an orthogonal projection of the signal shielding portion, the protection portion has a first through hole, and the isolation structure contacts the signal shielding portion through the first through hole.

6. The display panel according to claim 5.

8. The display panel further includes a first insulating layer located on a side of the signal shielding layer closer to the substrate, the first insulating layer including an insulating portion and a plurality of pixel openings defined by the insulating portion; the pixel opening communicates with the first isolation opening and is used for disposing a light emitting functional layer of the light emitting element; The light emitting element further includes a first electrode located on a side of the light emitting functional layer closer to the substrate, the pixel opening exposing at least a part of the first electrode; the first insulating layer comprises a pixel definition layer; 2. The display panel according to claim 1 .

9. the display panel includes a display area and a frame area surrounding the display area, the frame area including a lower frame area; the isolation structure is located in at least a portion of the display area and the lower frame area; the protective layer located in the lower frame region further has a second through hole, the first insulating layer located in the lower frame region has a third through hole, the second through hole and the third through hole are in communication with each other; the isolation structure located in the lower frame region is overlapped and joined to a ground end via the second through hole and the third through hole; 9. The display panel according to claim 8.

10. The frame region further includes a peripheral region other than the lower frame region, the signal shielding layer further includes a shielding structure located in the peripheral region, the shielding structure defining a plurality of shielding openings, and on the substrate, an orthogonal projection of the shielding structure located in the peripheral region and the first electrode located in the peripheral region covers an orthogonal projection of the peripheral region; 10. The display panel according to claim 9.

11. The insulating portion located in the peripheral region further includes a plurality of insulating openings; the shielding opening communicates with the insulating opening and exposes the first electrode located in the peripheral region; 11. The display panel according to claim 10.

12. the first electrode located in the peripheral region defines a plurality of electrode openings, the first insulating layer located in the peripheral region covers the plurality of electrode openings; On the substrate, an orthogonal projection of the shielding structure covers an orthogonal projection of the plurality of electrode openings.

11. The display panel according to claim 10.

13. a first electrode located in the peripheral region is overlapped and joined to the ground end; the shielding structure extends to the display area and is electrically connected to the isolation structure; 11. The display panel according to claim 10.

14. The light emitting device further includes a second electrode located on a side of the light emitting functional layer facing the substrate, the second electrode being located in the first isolation opening and overlappingly bonded to a side wall of the isolation structure.

2. The display panel according to claim 1 .

15. the display panel further includes a first sealing layer located on a side of the second electrode facing the substrate, and a second sealing layer located on a side of the first sealing layer facing the substrate, the first sealing layer includes a first sealing portion and a plurality of second openings defined by the first sealing portion, an orthogonal projection of the first sealing portion on the substrate covers an orthogonal projection of the second electrode, the second openings communicate with the second isolation opening, and an orthogonal projection of the second openings on the substrate covers an orthogonal projection of the second isolation opening; an orthogonal projection of the second encapsulation layer on the substrate covers the substrate; 15. The display panel according to claim 14.

16. A method for manufacturing a display panel, comprising the steps of: Providing a substrate; Sequentially forming a signal shielding layer and an inorganic material layer on the substrate; Etching the inorganic material layer to form an inorganic film layer; forming an isolation structure on the inorganic film layer and etching the inorganic film layer to form a protective layer; The isolation structure defines a plurality of first isolation openings and a plurality of second isolation openings, the plurality of first isolation openings are used to install light-emitting functional layers of a plurality of light-emitting elements; On the substrate, an orthogonal projection of the signal shielding layer covers an orthogonal projection of the second isolation opening, and on the substrate, an orthogonal projection of the protection layer covers an orthogonal projection of the second isolation opening. A method for manufacturing a display panel comprising the steps of:

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