Display panel, manufacturing method thereof, and display device

Abstract

The present disclosure provides a display panel and a manufacturing method thereof, and a display device, the display panel comprising a display area, the display area comprising a first display area and a second display area other than the first display area, the transmittance of the first display area being less than that of the second display area. The display panel comprises: a substrate substrate; a driving circuit layer; a plurality of anode structures located in the first display area, the adjacent anode structures having a gap therebetween, at least one anode structure comprising a functional layer and a first anode located in turn on the side of the driving circuit layer away from the substrate substrate, the first positive projection of the functional layer on the substrate substrate comprising a part that does not overlap with the second positive projection of the first anode on the substrate substrate; a pixel definition layer comprising a pixel definition part located in the gap. -0.1 microns ≤ d1-d2 ≤ 0.1 microns, d1 is the thickness of the functional layer, n1 is the refractive index of the functional layer, n2 is the refractive index of the pixel definition part, λ is the wavelength of visible light, and m is an integer.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a display panel, a method for manufacturing the same, and a display device. Background Technology

[0002] With the development of display technology, under-display camera technology is gradually being applied to achieve a larger screen-to-body ratio. Summary of the Invention

[0003] According to one aspect of the present disclosure, a display panel is provided, including a display area, the display area including a first display area and a second display area other than the first display area, wherein the transmittance of the first display area is less than the transmittance of the second display area. The display panel includes: a substrate; a driving circuit layer located on one side of the substrate and located in both the first and second display areas; a plurality of anode structures located in the first display area, wherein adjacent anode structures have gaps between them, at least one anode structure including a functional layer located on the side of the driving circuit layer away from the substrate and a first anode located on the side of the functional layer away from the substrate, wherein a first orthographic projection of the functional layer on the substrate includes a portion that does not overlap with a second orthographic projection of the first anode on the substrate; and a pixel defining layer located on the side of the driving circuit layer away from the substrate and including a pixel defining portion located in the gap, wherein: -0.1 μm ≤ d1 - d2 ≤ 0.1 μm, where d1 is the thickness of the functional layer. n1 is the refractive index of the functional layer, n2 is the refractive index of the pixel boundary, |n1-n2| is the absolute value of (n1-n2), λ is the wavelength of visible light, and m is an integer.

[0004] In some embodiments, the second orthographic projection lies within the first orthographic projection.

[0005] In some embodiments, the functional layer includes a first surface away from the substrate, a second surface close to the substrate, and a third surface adjacent to the first surface and the second surface, wherein the pixel defining portion contacts at least a portion of the area of ​​the first surface not covered by the first anode, and contacts the third surface.

[0006] In some embodiments, λ ranges from 500 nanometers to 600 nanometers.

[0007] In some embodiments, λ = 550 nanometers.

[0008] In some embodiments, m = 0.

[0009] In some embodiments, the thickness of the functional layer is 0.2 micrometers to 5 micrometers.

[0010] In some embodiments, the minimum distance between the edge of the second orthographic projection and the edge of the first orthographic projection is 1-3 micrometers.

[0011] In some embodiments, the shape of the second orthographic projection is the same as the shape of the first orthographic projection.

[0012] In some embodiments, |n1-n2| is greater than or equal to 0.15.

[0013] In some embodiments, the extinction coefficient of the functional layer is k, where 0 ≤ k ≤ 0.5.

[0014] In some embodiments, 0 ≤ k ≤ 0.1.

[0015] In some embodiments, d1 = d2.

[0016] In some embodiments, the material of the functional layer includes silicon nitrides, carbazole compounds, organic amine compounds, or butadiene compounds.

[0017] In some embodiments, the silicon nitride includes SiN. x .

[0018] In some embodiments, the first anode is opaque.

[0019] In some embodiments, the first anode stack includes a first layer, a second layer, and a third layer located between the first layer and the second layer, wherein the material of each of the first layer, the second layer, and the third layer includes a metal or a metal oxide.

[0020] In some embodiments, the display panel further includes a plurality of second anodes located in the second display area and in contact with the driving circuit layer.

[0021] In some embodiments, the driving circuit layer includes a pixel driving circuit connected to the first anode and located in the second display area.

[0022] According to another aspect of the present disclosure, a display device is provided, comprising: a display panel as described in any of the above embodiments; and a camera located on the side of the substrate away from the driving circuit layer, wherein the orthographic projection of the camera on the substrate at least partially overlaps with the first display area.

[0023] According to another aspect of the present disclosure, a method for manufacturing a display panel is provided. The display panel includes a display area, the display area including a first display area and a second display area other than the first display area, wherein the transmittance of the first display area is less than the transmittance of the second display area. The method includes: providing a substrate; forming a driving circuit layer located on one side of the substrate, situated between the first display area and the second display area; forming a plurality of anode structures located in the first display area, wherein adjacent anode structures in the plurality of anode structures have gaps, wherein forming at least one anode structure in the plurality of anode structures includes: forming a functional layer on the side of the driving circuit layer away from the substrate, and forming a first anode on the side of the functional layer away from the substrate, wherein a first orthographic projection of the functional layer on the substrate includes a portion that does not overlap with a second orthographic projection of the first anode on the substrate; and forming a pixel defining layer on the side of the driving circuit layer away from the substrate, the pixel defining layer including pixel defining portions located in the gaps, wherein: -0.1 μm ≤ d1 - d2 ≤ 0.1 μm, where d1 is the thickness of the functional layer. n1 is the refractive index of the functional layer, n2 is the refractive index of the pixel boundary, |n1-n2| is the absolute value of (n1-n2), λ is the wavelength of visible light, and m is an integer. Attached Figure Description

[0024] The accompanying drawings, which form part of this specification, illustrate embodiments of this disclosure and, together with the specification, serve to explain the principles of this disclosure.

[0025] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0026] Figure 1A This is a top view schematic diagram showing a display panel according to an embodiment of the present disclosure;

[0027] Figure 1B This is a cross-sectional schematic diagram showing a display panel according to an embodiment of the present disclosure;

[0028] Figure 1C This is a schematic diagram illustrating a first orthographic projection and a second orthographic projection according to an embodiment of the present disclosure;

[0029] Figure 1D This is a schematic diagram illustrating a first orthographic projection and a second orthographic projection according to another embodiment of the present disclosure;

[0030] Figure 2 This is a schematic cross-sectional view of a first anode according to an embodiment of the present disclosure;

[0031] Figure 3AThis is a cross-sectional schematic diagram showing a display panel according to another embodiment of the present disclosure;

[0032] Figure 3B This is a cross-sectional schematic diagram showing a display panel according to yet another embodiment of the present disclosure;

[0033] Figure 4A This is a simulation diagram illustrating the dot spread function of a display panel that does not employ a functional layer;

[0034] Figure 4B This is a simulation diagram illustrating the dot spread function of a display panel with a hole transport layer as a functional layer according to an embodiment of the present disclosure;

[0035] Figure 5A This is a simulation diagram illustrating the modulation transfer function of the meridional plane according to some embodiments of the present disclosure;

[0036] Figure 5B This is a simulation diagram illustrating the modulation transfer function of the arcuate surface according to some embodiments of the present disclosure;

[0037] Figure 6 This is a schematic cross-sectional view of a display device according to an embodiment of the present disclosure;

[0038] Figure 7 This is a schematic flowchart illustrating a method for manufacturing a display panel according to an embodiment of the present disclosure.

[0039] It should be understood that the dimensions of the various parts shown in the accompanying drawings are not necessarily drawn to actual scale. Furthermore, the same or similar reference numerals denote the same or similar components. Detailed Implementation

[0040] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present disclosure or its application or use. The present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that the present disclosure will be thorough and complete, and will fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless specifically stated otherwise, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0041] The terms "first," "second," and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "containing" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well. Terms such as "above" and "below" are used only to indicate relative positional relationships, and these relative positional relationships may also change accordingly when the absolute position of the described object changes.

[0042] In this disclosure, when a specific component is described as being located between a first component and a second component, an intermediary component may or may not be present between the specific component and the first or second component. When a specific component is described as connecting to other components, the specific component may be directly connected to the other components without having an intermediary component, or it may not be directly connected to the other components but may have an intermediary component.

[0043] All terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as a dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0044] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0045] In related technologies, to ensure proper display of the area corresponding to the camera on the display panel, a light-emitting device is still installed in that area of ​​the display panel. The inventors noted that there is a gap between the first anodes of the different light-emitting devices, which is equivalent to setting a grating in front of the camera. When light passes through this area of ​​the display panel, it diffracts at the edge of the first anode, resulting in reduced image resolution and thus glare in the final image.

[0046] In view of the above, the present disclosure proposes the following technical solutions.

[0047] Figure 1A This is a top view schematic diagram showing a display panel according to an embodiment of the present disclosure. Figure 1B This is a cross-sectional schematic diagram showing a display panel according to an embodiment of the present disclosure.

[0048] The following is combined with Figure 1A and Figure 1B A display panel according to some embodiments of the present disclosure will be described.

[0049] like Figure 1AAs shown, the display panel includes a display area 110. Here, the display area 110 includes a first display area 1101 and a second display area 1102 excluding the first display area 1101. In other words, the area of ​​the display area 110 other than the first display area 1101 is referred to as the second display area 1102. The transmittance of the first display area 1101 is less than the transmittance of the second display area 1102. The number of first display areas 1101 can be one or more. The shape of the first display area 1101 can be, for example, square, circular, etc. In some embodiments, the second display area 1102 can completely surround the first display area 1101; in other embodiments, the second display area 1102 can partially surround the first display area 1101, that is, a portion of the edge of the first display area 1101 overlaps with a portion of the edge of the display area 1101.

[0050] It is understood that, in some embodiments, the display panel may further include a peripheral area surrounding the display area 110. Figure 1A (Not shown).

[0051] like Figure 1B As shown, the display panel includes a substrate 11, a driving circuit layer 12, multiple anode structures 13, and a pixel defining layer 14.

[0052] In some embodiments, the substrate 11 may include a flexible substrate. For example, the material of the substrate 11 may include organic materials such as polyimide (PI).

[0053] The driving circuit layer 12 is located on one side of the substrate 11 and is situated in both the first display area 1101 and the second display area 1102. In other words, both the first display area 1101 and the second display area 1102 include the driving circuit layer 12. For example, the driving circuit layer 12 may include a pixel driving circuit and a planarization layer covering the pixel driving circuit.

[0054] Multiple anode structures 13 are located in the first display area 1101. Adjacent anode structures 13 are separated by a gap GP. At least one anode structure 13 includes a functional layer 131 and a first anode 132. For example, some anode structures 13 include both a functional layer 131 and a first anode 132, while other anode structures 13 include only the first anode 132 without the functional layer 131; or, for example, each anode structure 13 includes both a functional layer 131 and a first anode 132.

[0055] The functional layer 131 is located on the side of the driving circuit layer 12 away from the substrate 11, and the first anode 132 is located on the side of the functional layer 131 away from the substrate 11. Here, the first orthographic projection 131' of the functional layer 131 on the substrate 11 includes a portion that does not overlap with the second orthographic projection 132' of the first anode 132 on the substrate 11, which will be discussed later. Figure 1C and Figure 1D In other words, a portion of the first orthographic projection 131' overlaps with the second orthographic projection 132', while another portion does not overlap with the second orthographic projection 132'. In other words, the first orthographic projection 131' includes the portion located outside the second orthographic projection 132', while at least a portion of the second orthographic projection 132' is located within the first orthographic projection 131'.

[0056] The pixel defining layer 14 is located on the side of the driving circuit layer 12 away from the substrate 11. The pixel defining layer 14 includes a pixel defining portion 141 located in the gap GP. In other words, the portion of the pixel defining layer 14 located in the gap GP is referred to as the pixel defining portion 141. In some embodiments, the pixel defining portion 141 is in contact with the functional layer 131. For example, the material of the pixel defining layer 14 may be polyimide, acrylic, or polyethylene terephthalate, etc.

[0057] For ease of explanation, the thickness of functional layer 131 is defined as d1, and, defined Here, d1 and d2 satisfy the following relationship: -0.1 μm ≤ d1 - d2 ≤ 0.1 μm. n1 is the refractive index of functional layer 131, n2 is the refractive index of pixel defining part 141, |n1 - n2| is the absolute value of (n1 - n2), λ is the wavelength of visible light, and m is an integer.

[0058] It is understandable that when d1 = d2, the light ray L1 passing through the functional layer 131 from the edge of the first anode 132 and the partial light ray L2 passing through the pixel defining portion 141 satisfy the interference cancellation condition. Therefore, light rays L1 and L2 can completely interfere cancelingly and will not be incident on the substrate 11. When -0.1 μm ≤ d1 - d2 ≤ 0.1 μm, light rays L1 and L2 interfere cancelingly at least partially, thereby at least reducing the diffraction of light passing through the edge of the first anode 132.

[0059] In the above embodiment, -0.1 micrometers ≤ d1-d2 ≤ 0.1 micrometers reduces the diffraction of external light passing through the gap GP between adjacent first anodes 132. This helps to improve the imaging resolution of light, thereby reducing the glare problem in camera imaging and improving the quality of camera imaging.

[0060] It is understood that, in addition to the components described above, the display panel may also include other components, such as... Figure 1B The diagram shows a light-emitting layer 15 located on the side of each first anode 132 away from the substrate 11, a cathode 16 located on the side of the light-emitting layer 15 away from the substrate 11, and an encapsulation layer 17 located on the side of the cathode 16 away from the substrate 11. The light-emitting layer 15 includes, for example, at least an organic light-emitting material layer. In some embodiments, the light-emitting layer 15 may further include one or more of an electron transport layer, an electron injection layer, a hole transport layer, and a hole injection layer. The encapsulation layer 17 may include a thin-film encapsulation layer.

[0061] According to one or more embodiments of this disclosure, see Figure 1B The functional layer 131 includes a first surface S1 away from the substrate 11, a second surface S2 close to the substrate 11, and a third surface S3 adjacent to the first surface S1 and the second surface S2. The pixel defining portion 141 contacts at least a portion of the area of ​​the first surface S1 not covered by the first anode 132, and contacts the third surface S3. In other words, the pixel defining portion 141 fills the gap GP.

[0062] Figure 1C This is a schematic diagram illustrating a first orthographic projection and a second orthographic projection according to an embodiment of the present disclosure. Figure 1D This is a schematic diagram illustrating a first orthographic projection and a second orthographic projection according to another embodiment of the present disclosure. It should be noted that... Figure 1C and Figure 1D The pixel defining portion GP and its orthographic projection GP' on the substrate 11 are also shown.

[0063] like Figure 1C and Figure 1D As shown, a portion of the first orthographic projection 131' of the functional layer 131 on the substrate 11 does not overlap with the second orthographic projection 132' of the first anode 132 on the substrate 11.

[0064] In one or more embodiments, such as Figure 1D As shown, the display panel also includes an anode trace TR integrally disposed with the first anode 132. For example, a pixel driving circuit can be connected to the anode trace TR via a via, thereby realizing the connection between the pixel driving circuit and the first anode 132. For example, if the first anode 132 and the anode trace TR are considered as a whole structure, the portion of the outline of the whole structure that is similar to the outline of the pixel defining portion GP can be regarded as the first anode 132, and the remaining portion can be regarded as the anode trace TR. Similarly, if the second orthographic projection 132' of the first anode 132 on the substrate 11 and the orthographic projection TR' of the anode trace TR on the substrate 11 are considered as a whole projection, the portion of the outline of the whole projection that is similar to the outline of the orthographic projection GP' of the pixel defining portion GP on the substrate 11 can be regarded as the second orthographic projection 132', and the remaining portion can be regarded as the orthographic projection TR'.

[0065] In some embodiments, such as Figure 1C and 1D As shown, the second orthographic projection 132' is located within the first orthographic projection 131'. In this manner, diffraction of external light passing through the gap GP between adjacent first anodes 132 can be further reduced, thereby helping to further improve the imaging resolution of the light and further reduce the problem of image glare.

[0066] Understandably, in Figure 1D In the diagram, part of the orthographic projection TR' overlaps with orthographic projection 131', while the other part lies outside of orthographic projection 131'.

[0067] In some embodiments, the minimum distance D between the edge of the second orthographic projection 132' and the edge of the first orthographic projection 131' is 1-3 micrometers, for example, 1 micrometer, 1.5 micrometers, 2 micrometers, 3 micrometers, etc. The inventors noted that when the distance D is greater than 3 micrometers, the diffraction improvement effect is no longer significant. Therefore, when the distance D is within this range, both process difficulty and diffraction improvement effect can be taken into account.

[0068] It should be understood that there are multiple distances between the multiple first points on the edge of the second orthographic projection 132' and the multiple second points on the edge of the first orthographic projection 131'. The minimum distance D between the edge of the second orthographic projection 132' and the edge of the first orthographic projection 131' is the minimum value among the multiple distances.

[0069] In some embodiments, the shape of the second orthographic projection 132' is the same as the shape of the first orthographic projection 131'. In some implementations, the second orthographic projection 132' and the first orthographic projection 131' are two concentric circles. It is understood that in this case, the distance between the two concentric circles is 1-3 micrometers. In some embodiments, the first anode 132 is opaque. For example, the first anode 132 may comprise a stack. The following is in conjunction with... Figure 2 This section introduces some implementation methods for the first anode.

[0070] Figure 2 This is a schematic cross-sectional view of a first anode according to an embodiment of the present disclosure.

[0071] like Figure 2 As shown, the stack of the first anode 132 includes a first layer 1321, a second layer 1322, and a third layer 1323 located between the first layer 1321 and the second layer 1322. For example, the material of one of the first layer 1321, the second layer 1322, and the third layer 1323 may include a metal or a metal oxide. As some examples, the material of the metal oxide may include indium tin oxide (ITO), etc. As some examples, the material of the metal may include silver (Ag).

[0072] In some embodiments, the first layer 1321 is made of the same material as the second layer 1322, for example, both of which include ITO; while the third layer 1322 is made of Ag. For example, the stack of the first anode 132 may be ITO / Ag / ITO.

[0073] It should be noted that, within the wavelength range of visible light, the embodiments of this disclosure can reduce the diffraction of visible light of different wavelengths when λ has different values.

[0074] In some embodiments, the range of λ in d2 is 500 nm to 600 nm, such as 520 nm, 540 nm, 560 nm, etc. Since the human eye is more sensitive to light in the range of 550 nm to 600 nm, this can reduce the diffraction of light in the range of 500 nm to 600 nm when it passes through the gap GP between adjacent first anodes 132, thereby helping to further reduce the problem of glare in camera imaging and further improve the quality of camera imaging.

[0075] In some embodiments, λ = 550 nm in d2 above. Since the human eye is most sensitive to light at 550 nm, this reduces diffraction of 550 nm light as it passes through the gap GP between adjacent first anodes 132, thereby helping to further reduce glare in camera imaging and further improve the quality of camera imaging.

[0076] When the display panel includes the functional layer 131, the thickness of the display panel will increase. To mitigate the glare problem in camera imaging and avoid excessive thickness of the display panel, the embodiments of this disclosure also propose the following solutions.

[0077] In some embodiments, m = 0 in d2 above. This helps to reduce the thickness of the functional layer 131. Thus, while mitigating the glare problem in camera imaging, the thickness of the display panel can be reduced.

[0078] In other embodiments, the absolute value of the difference |n1-n2| between the refractive index n1 of the functional layer 131 and the refractive index n2 of the pixel defining portion 141 is greater than or equal to 0.15, for example, 0.2, 0.4, 0.5, etc. This helps to reduce the thickness of the functional layer 131. Thus, while mitigating the glare problem in camera imaging, the thickness of the display panel can be reduced.

[0079] In some other embodiments, m = 0 in d2 above, and the absolute value of the difference |n1-n2| between the refractive index n1 of the functional layer 131 and the refractive index n2 of the pixel defining portion 141 is greater than or equal to 0.15. This approach helps to further reduce the thickness of the functional layer 131. Thus, while mitigating the glare problem in camera imaging, the thickness of the display panel can be further reduced.

[0080] According to some embodiments of this disclosure, the thickness of the functional layer 131 is 0.2 micrometers to 5 micrometers, for example, 0.3 micrometers, 0.4 micrometers, etc.

[0081] Functional layer 131 can be implemented in different ways. Some specific implementation methods of functional layer 131 are introduced below.

[0082] As one implementation, the material of functional layer 131 includes silicon nitride. For example, the silicon nitride layer may include SiN. x It should be understood that SiN x In this context, x is greater than 0. In some embodiments, SiN... x The refractive index n1 is 1.903, and the refractive index of the pixel boundary portion 141 is 1.658. (SiN) x The thickness ranges from 0.9 micrometers to 1 micrometer.

[0083] In other implementations, the material of functional layer 131 includes materials that can serve as hole transport layers for light-emitting devices. In some embodiments, functional layer 131 includes carbazole, organic amine, and butadiene compounds, such as N,N'-diphenyl-N,N'-(1-naphthyl)-1,1'-biphenyl-4,4'-diamine (molecular formula: C44H32N2, abbreviated as NPB), 4,4'-cyclohexylbis[N,N-di(4-methylphenyl)aniline] (molecular formula: C46H46N2, abbreviated as TAPC), polyvinylcarbazole (PVK), and total petroleum hydrocarbons (TPH). In some embodiments, the refractive index n1 of the hole transport layer is 1.9153, the refractive index of the pixel defining portion 141 is 1.658, and the thickness of the hole transport layer is 0.8 micrometers to 0.9 micrometers.

[0084] In some embodiments, the extinction coefficient of the functional layer 131 is k, where 0 ≤ k ≤ 0.5. For example, k = 0.1, 0.2, or 0.3. In this way, the light transmittance of the area corresponding to the display panel and the first display area 1101 can be improved.

[0085] In some embodiments, 0 ≤ k ≤ 0.1. For example, k = 0.03, 0.05, 0.08. In this way, the light transmittance of the area corresponding to the display panel and the first display area 1101 can be further improved.

[0086] Figure 3A This is a cross-sectional schematic diagram showing a display panel according to another embodiment of the present disclosure.

[0087] like Figure 3A As shown, the display panel also includes a plurality of second anodes 18 located in the second display area 1102. Here, the plurality of second anodes 18 are in contact with the planarization layer 122 in the driving circuit layer 12. With this structure, only the functional layer 131 needs to be provided in the first display area 1101, instead of providing the functional layer 131 in the entire display area 110, which simplifies the manufacturing process of the display panel.

[0088] here, Figure 3A The pixel defining layer 14 is also shown in the pixel defining portion 142 of the second display area 1102. The pixel defining portion 142 is located between adjacent second anodes 18.

[0089] In some embodiments, such as Figure 3A As shown, the driving circuit layer 12 includes a pixel driving circuit 121 connected to the first anode 132. The pixel driving circuit 121 can drive the light-emitting device located in the first display area 1101 to emit light. Here, the pixel driving circuit 121 is located in the second display area 1102. For example, the pixel driving circuit 121 can be connected to one or more first anodes 132, thereby driving one or more light-emitting devices located in the first display area 1101 to emit light.

[0090] As some implementations, the pixel driving circuit 121 may include two thin-film transistors and a capacitor (2T1C), six thin-film transistors and a capacitor (6T1C), or seven thin-film transistors and a capacitor (7T1C). For example, the active layer of each thin-film transistor may include low-temperature polycrystalline silicon (LTPS) or oxide semiconductor.

[0091] In the above embodiment, the pixel driving circuit 121 connected to the first anode 132 is located in the second display area 1102 instead of the first display area 1101. This can increase the light transmittance of the area corresponding to the first display area 1101 of the display panel and avoid the adverse effects of the pixel driving circuit 121 on the camera imaging.

[0092] It is understood that the driving circuit layer 12 may also include other pixel driving circuits (not shown) connected to the second anode 18 and located in the second display area 1102. These pixel driving circuits can drive the light-emitting devices located in the second display area 1102 to emit light.

[0093] Figure 3B This is a cross-sectional schematic diagram showing a display panel according to yet another embodiment of the present disclosure.

[0094] like Figure 3B As shown, the pixel driving circuit in driving circuit layer 12 may include a thin-film transistor T and a capacitor C. It should be understood that the pixel driving circuit may also include other thin-film transistors.

[0095] The thin-film transistor T includes an active layer AT located on one side of a substrate 11, a first insulating layer IL1 located on the side of the active layer AT away from the substrate 11, a gate GT located on the side of the first insulating layer IL1 away from the substrate 11, a first electrode ED1 and a second electrode ED2 penetrating a second insulating layer IL2 and a third insulating layer IL3. Here, the second insulating layer IL2 is located on the side of the gate GT away from the substrate 11, and the third insulating layer IL3 is located on the side of the second insulating layer IL2 away from the substrate 11. For example, the material of the active layer AT may include one or more of amorphous indium gallium zinc oxide (a-IGZO), zinc oxynitride (ZnON), indium zinc tin oxide (IZTO), amorphous silicon (a-Si), polycrystalline silicon (p-Si), hexathiophene, and polythiophene. For example, the materials of the first insulating layer IL1, the second insulating layer IL2, the third insulating layer IL3, and the fourth insulating layer IL4 may include one or more of silicon oxide, silicon nitride, and silicon oxide nitride. As some implementations, the material of at least one of the first electrode ED1 and the second electrode ED2 may include a metal or an alloy. Examples of metals may include one or more of silver (Ag), copper (Cu), aluminum (Al), titanium (Ti), and molybdenum (Mo). Examples of alloys may include aluminum-neodymium alloy (AlNd) or molybdenum-niobium alloy (MoNb). For example, the first electrode ED1 and the second electrode ED2 may be monolayer or multilayer structures, such as Ti / Al / Ti.

[0096] The capacitor C includes a first electrode plate C1 located between a first insulating layer IL1 and a second insulating layer IL2, and a second electrode plate C2 located between a second insulating layer IL2 and a third insulating layer IL3. It should be understood that the capacitor C also includes a second insulating layer IL2 located between the first electrode plate C1 and the second electrode plate C2. A planarization layer 12 covers the first electrode ED1 and the second electrode ED2. For example, the first electrode plate C1 and the gate GT may be located on the same layer, i.e., formed by patterning the same material layer. As some implementations, the material of at least one of the first electrode plate C1 and the second electrode plate C2 may include the aforementioned metal or alloy.

[0097] The second anode 18 can be connected to the second electrode ED2 of the thin-film transistor T in the corresponding pixel driving circuit through a via through the planarization layer 12. Similarly, the first anode 132 can also be connected to the second electrode ED2 of the thin-film transistor T in the corresponding pixel driving circuit through a via through the planarization layer 12. For example, the anode trace TR integrally formed with the first anode 132 is connected to the second electrode ED2 of the thin-film transistor T through a via through the planarization layer 12.

[0098] Figure 3B Also shown is a spacer pillar PS located on the side of the pixel definition layer 14 away from the substrate. The spacer pillar PS is configured to support a mask, such as a high-precision mask (FMM). In some examples, the spacer pillar 34 may be located between adjacent red and blue subpixels.

[0099] In some embodiments, the display panel may further include a buffer layer BF located between the substrate 11 and the active layer AT. The buffer layer BF is used to improve the resistance of the substrate 11 to water and oxygen. For example, the buffer layer BF can prevent water vapor and oxygen from entering the active layer AT.

[0100] In some embodiments, the light-emitting layer 15 may include Figure 3B The diagram shows a first light-emitting layer 151, a second light-emitting layer 152, and a third light-emitting layer 153. Here, the first light-emitting layer 151, the second light-emitting layer 152, and the third light-emitting layer 153 belong to the light-emitting devices of three sub-pixels (e.g., a red sub-pixel, a green sub-pixel, and a blue sub-pixel). The light-emitting device of each sub-pixel may also include one or more of a hole injection layer (HIL), a hole transport layer (HTL), and an electron transport layer (ETL). For example, the hole injection layer (HIL), the hole transport layer (HTL), and the electron transport layer (ETL) may be shared by different sub-pixels.

[0101] It should be noted that, although Figure 3B Two adjacent light-emitting layers 151, 152, and 153 shown may overlap, but this is not limiting. In other embodiments, the first light-emitting layer 151, the second light-emitting layer 152, and the third light-emitting layer 153 may not overlap each other.

[0102] In some embodiments, see Figure 3B The encapsulation layer 17 may include a first inorganic layer 171, a second inorganic layer 172, and an organic layer 173 located between the first inorganic layer 171 and the second inorganic layer 172. In other embodiments, the encapsulation layer 17 may also include more layers, for example, it may include another organic layer located on the side of the second inorganic layer 172 away from the substrate 11, and a third inorganic layer located on the side of the other organic layer away from the substrate 11.

[0103] Figure 4A This is a simulation diagram illustrating the dot spread function of a display panel that does not employ a functional layer. Figure 4B This is a simulation diagram illustrating the dot spread function of a display panel with a hole transport layer as a functional layer according to an embodiment of the present disclosure.

[0104] The point spread function can represent the diffuse intensity distribution of light after imaging from a point source, and can characterize the magnitude of diffraction. From Figure 4A and Figure 4B It can be seen that the display panel using a functional layer reduces light diffraction.

[0105] Figure 5A This is a simulation diagram illustrating the modulation transfer function of the meridional plane according to some embodiments of the present disclosure. Figure 5B This is a simulation diagram illustrating the modulation transfer function of the arcuate surface according to some embodiments of the present disclosure.

[0106] exist Figure 5A and Figure 5B In the MTF1, MTF1 represents the modulation transfer function of a display panel that does not use a functional layer, and MTF2 represents the modulation transfer function of a display panel that uses a hole transport layer as its functional layer.

[0107] The modulation transfer function represents the resolution at different spatial frequencies. From... Figure 5A As can be seen from Figure 5, the display panel with a functional layer reduces light diffraction and improves resolution.

[0108] Depend on Figure 4A , Figure 4B , Figure 5A and Figure 5B As can be seen, the display panel of this embodiment can effectively improve the imaging resolution of light, thereby reducing the glare problem in camera imaging and improving the quality of camera imaging.

[0109] Figure 6 This is a schematic cross-sectional view of a display device according to an embodiment of the present disclosure.

[0110] like Figure 6 As shown, the display device may include the display panel 10 of any of the above embodiments. In some embodiments, see Figure 6 The display device also includes a camera 20, located on the side of the substrate 11 away from the driving circuit layer 12. The orthographic projection of the camera 20 on the substrate 11 at least partially overlaps with the first display area 1101. For example, the orthographic projection of the camera 20 on the substrate 11 is located within the first display area 1101.

[0111] In some embodiments, the display device may be any product or component with display functionality, such as a mobile terminal (e.g., a smartphone, tablet computer), a television, a monitor, a laptop computer, a digital photo frame, a navigator, or electronic paper.

[0112] Figure 7 This is a schematic flowchart illustrating a method for manufacturing a display panel according to an embodiment of the present disclosure. Here, the display panel includes a display area, which includes a first display area and a second display area other than the first display area. The transmittance of the first display area is less than the transmittance of the second display area.

[0113] In step 702, a substrate is provided. It should be understood that the substrate is located in both the first display area and the second display area.

[0114] In step 704, a driving circuit layer located in the first display area and the second display area is formed on one side of the substrate.

[0115] Here, the driving circuit layer includes pixel driving circuitry for driving the light-emitting devices.

[0116] In step 706, a plurality of anode structures are formed in the first display area. Adjacent anode structures have gaps between them.

[0117] At least one of the multiple anode structures can be formed in the following manner.

[0118] First, a functional layer is formed on the side of the driving circuit layer away from the substrate. For example, a functional material layer can be formed on the side of the driving circuit layer away from the substrate, and then the functional material layer is patterned using a mask to form the functional layer.

[0119] Then, a first anode is formed on the side of the functional layer away from the substrate. Here, the first orthographic projection of the functional layer on the substrate includes a portion that does not overlap with the second orthographic projection of the first anode on the substrate.

[0120] In step 708, a pixel defining layer is formed on the side of the driving circuit layer away from the substrate. Here, the pixel defining layer includes pixel defining portions located in the gaps between adjacent anode structures.

[0121] The resulting display panel satisfies the following condition: -0.1 micrometers ≤ d1 - d2 ≤ 0.1 micrometers. d1 is the thickness of the functional layer. n1 is the refractive index of the functional layer, n2 is the refractive index of the pixel boundary, |n1-n2| is the absolute value of (n1-n2), λ is the wavelength of visible light, and m is an integer.

[0122] In the above embodiment, -0.1 micrometers ≤ d1-d2 ≤ 0.1 micrometers reduces the diffraction of external light passing through the gap between adjacent first anodes, which helps to improve the imaging resolution of light, thereby reducing the glare problem in camera imaging and improving the quality of camera imaging.

[0123] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0124] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. The scope of this disclosure is defined by the appended claims.

Claims

1. A display panel comprising a display area, the display area comprising a first display area and a second display area other than the first display area, a transmittance of the first display area being less than a transmittance of the second display area, the display panel comprising: a substrate; a drive circuit layer on a side of the substrate and on the first display area and the second display area; a plurality of anode structures on the first display area, adjacent anode structures of the plurality of anode structures having a gap therebetween, at least one anode structure of the plurality of anode structures comprising: a functional layer on a side of the drive circuit layer distal to the substrate, and a first anode on a side of the functional layer distal to the substrate, wherein a first orthogonal projection of the functional layer onto the substrate comprises a portion that does not overlap a second orthogonal projection of the first anode onto the substrate; and a pixel defining layer on a side of the drive circuit layer distal to the substrate and comprising a pixel defining portion in the gap, wherein: -0.1 micrometers ≤ d1-d2 ≤ 0.1 micrometers, the second orthogonal projection is within the first orthogonal projection. The functional layer comprises a first face distal to the substrate, a second face proximal to the substrate, and a third face contiguous with the first face and the second face, the pixel defining portion is in contact with at least part of a region of the first face not covered by the first anode and in contact with the third face. λ is in a range of 500 nanometers to 600 nanometers. λ = 550 nanometers. The functional layer has a thickness of 0.2 micrometers to 5 micrometers. A minimum distance between an edge of the second orthogonal projection and an edge of the first orthogonal projection is 1-3 micrometers. The second orthogonal projection has a shape identical to a shape of the first orthogonal projection. |n1-n2| is greater than or equal to 0.

15. where d1 is the thickness of the functional layer, d2 = 0.5d1, n1 is the refractive index of the functional layer, n2 is the refractive index of the pixel defining portion, |n1-n2| is the absolute value of (n1-n2), λ is the wavelength of visible light, and m is an integer. where d1 is the thickness of the functional layer, d2 = 0.5d1, n1 is the refractive index of the functional layer, n2 is the refractive index of the pixel defining portion, |n1-n2| is the absolute value of (n1-n2), λ is the wavelength of visible light, and m is an integer.

2. The display panel of claim 1, wherein, The functional layer has an extinction coefficient of k, 0 ≤ k ≤ 0.

5.

3. The display panel of claim 1, wherein, d1 = d2.

4. The display panel of claim 1, wherein, A material of the functional layer comprises a nitride of silicon, a carbazole compound, an organic amine compound, or a butadiene compound.

5. The display panel of claim 4, wherein, The first anode is opaque.

6. The display panel according to any one of claims 1-5, wherein, m=0。 7. The display panel of claim 1, wherein, The first anode comprises a stack comprising a first layer, a second layer, and a third layer between the first layer and the second layer, a material of each of the first layer, the second layer, and the third layer comprising a metal or a metal oxide.

8. The display panel of claim 2, wherein, 18.The display panel of any one of claims 1-5, further comprising: a plurality of second anodes on the second display area and in contact with a planarization layer in the drive circuit layer.

9. The display panel of claim 8, wherein, The drive circuit layer comprises: a pixel driving circuit connected with the first anode and on the second display area.

10. The display panel of claim 1, wherein, 20.A display device comprising: the display panel of any one of claims 1-19; and a camera on a side of the substrate distal to the drive circuit layer, an orthogonal projection of the camera onto the substrate at least partially overlapping the first display area.

11. The display panel of claim 1, wherein, ​ 12. The display panel of claim 11, wherein, 0≤k≤0.1。 13. The display panel of any one of claims 1-5, wherein, ​ 14. The display panel of claim 1, wherein, ​ 15. The display panel of claim 14, wherein, The nitride of silicon comprises SiN x .

16. The display panel of claim 1, wherein, ​ 17. The display panel of claim 16, wherein, ​ ​ ​ 19. The display panel of any one of claims 1-5, wherein, ​ ​ ​ ​ ​ ​ 21. A method of manufacturing a display panel, the display panel comprising a display area, the display area comprising a first display area and a second display area other than the first display area, a transmittance of the first display area being less than a transmittance of the second display area, the method comprising: providing a substrate base plate; forming a drive circuit layer on a side of the substrate base plate located in the first display area and the second display area; forming a plurality of anode structures in the first display area, adjacent anode structures of the plurality of anode structures having a gap therebetween, wherein forming at least one anode structure of the plurality of anode structures comprises: forming a functional layer on a side of the drive circuit layer distal to the substrate base plate, and forming a first anode on a side of the functional layer distal to the substrate base plate, wherein a first orthogonal projection of the functional layer onto the substrate base plate comprises a portion that does not overlap a second orthogonal projection of the first anode onto the substrate base plate; and forming a pixel defining layer on a side of the drive circuit layer distal to the substrate base plate, the pixel defining layer comprising a pixel defining portion located in the gap, wherein: -0.1 micrometers ≤ d1 - d2 ≤ 0.1 micrometers, where d1 is the thickness of the functional layer, d2 = 0.5d1, n1 is the refractive index of the functional layer, n2 is the refractive index of the pixel defining portion, |n1-n2| is the absolute value of (n1-n2), λ is the wavelength of visible light, and m is an integer. where d1 is the thickness of the functional layer, d2 = 0.5d1, n1 is the refractive index of the functional layer, n2 is the refractive index of the pixel defining portion, |n1-n2| is the absolute value of (n1-n2), λ is the wavelength of visible light, and m is an integer.

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