Display panel and display device

Abstract

The application discloses a display panel and a display device. The display panel has a first display area and a second display area, the light transmittance of the first display area is greater than that of the second display area, the first display area comprises a plurality of first pixel units, each first pixel unit comprises at least three color sub-pixels, each sub-pixel comprises a first electrode, a light-emitting structure and a second electrode which are sequentially stacked, a first pixel driving circuit is electrically connected with the first electrode to drive the sub-pixel of the first pixel unit to emit light, the first pixel driving circuit is provided with a cascade conductive structure, and / or the first pixel driving circuit is electrically connected with the first electrode through the cascade conductive structure; in the first display area, the cascade conductive structure is a cascade body of at least two light transmittance conductor materials. According to the display panel provided by the embodiment of the application, the light transmittance of the first display area can be further increased and the diffraction thereof can be reduced.

Description

Technical Field

[0001] This invention relates to the field of displays, and more specifically to a display panel and a display device. Background Technology

[0002] With the rapid development of electronic devices, users have increasingly higher requirements for screen ratio, making full-screen displays of electronic devices receive more and more attention from the industry.

[0003] Traditional electronic devices such as mobile phones and tablets need to integrate components such as front-facing cameras, earpieces, and infrared sensors. In existing technology, notches or holes are made in the display screen, allowing external light to enter the photosensitive element located beneath the screen. However, these electronic devices are not truly full-screen displays and cannot display images across the entire screen area; for example, the area corresponding to the front-facing camera cannot display an image. Summary of the Invention

[0004] This invention provides a display panel and a display device, which enables at least a portion of the display panel to be light-transmitting and displayable, facilitating the under-screen integration of photosensitive components.

[0005] This invention provides a display panel, characterized in that it has a first display area and a second display area, wherein the light transmittance of the first display area is greater than the light transmittance of the second display area, and the first display area includes:

[0006] Multiple first pixel units, each first pixel unit including at least three colors of sub-pixels, each sub-pixel including a first electrode, a light-emitting structure and a second electrode arranged in sequence;

[0007] The display panel further includes a first pixel driving circuit that is electrically connected to the first electrode to drive the sub-pixels of the first pixel unit to emit light, wherein the first pixel driving circuit is provided with a cascaded conductive structure, and / or is electrically connected to the first electrode through the cascaded conductive structure of the first pixel driving circuit.

[0008] Within the first display area, the cascaded conductive structure is a cascade of at least two light transmittance conductor materials.

[0009] According to one aspect of the present invention, the cascaded conductive structure includes a plurality of first conductor segments and a plurality of second conductor segments, wherein the first conductor segments and the second conductor segments are sequentially and electrically connected to form a cascade.

[0010] According to one aspect of the present invention, the cascaded conductive structure includes a plurality of first conductor segments and a plurality of second conductor segments, wherein the first conductor segments are sequentially electrically connected to each other to form a cascade, and the second conductor segments are connected in parallel with the cascade to conduct electricity.

[0011] According to one aspect of the present invention, the cascaded conductive structure includes a plurality of first conductor segments and a plurality of second conductor segments, wherein the second conductor segments are sequentially electrically connected to form a cascade, and the first conductor segments are connected in parallel with the cascade to conduct electricity.

[0012] According to one aspect of the present invention, the cascaded conductive structure includes a plurality of first conductor segments and a plurality of second conductor segments, wherein the second conductor segments are sequentially electrically connected to form a first-level cascade, and the first conductor segments are embedded between adjacent first-level cascade segments to form a second-level cascade.

[0013] According to one aspect of the present invention, the cascaded conductive structure includes a plurality of first conductor segments and a plurality of second conductor segments, wherein the first conductor segments are sequentially electrically connected to each other to form a first-level cascade, and the second conductor segments are embedded between adjacent first-level cascade segments to form a second-level cascade.

[0014] According to one aspect of the present invention, the cascaded conductive structure is a series or parallel structure of a plurality of second-level cascades.

[0015] According to one aspect of the present invention, the light transmittance of the first conductor is greater than or equal to 80%; or the light transmittance of the first conductor is less than or equal to 40%.

[0016] According to one aspect of the present invention, the first wire is selected from a transparent conductor made of ITO or IZO, and the second wire is selected from a metallic conductor made of Ti / Al / Ti alloy or Mo.

[0017] According to one aspect of the present invention, the sheet resistance of the first conductor is 20 ohms / square or more; the sheet resistance of the second conductor is 1 ohm / square or less.

[0018] According to one aspect of the present invention, the display panel further includes:

[0019] Substrate;

[0020] A device layer, located on the substrate, includes a planarization layer and at least one conductive layer, wherein the conductive layer is located between the substrate and the planarization layer;

[0021] Wherein, the at least one conductive layer is the cascaded conductive structure, and the cascaded conductive structure is electrically connected to the corresponding first electrode through a via.

[0022] According to one aspect of the present invention, the cascaded conductive structure includes a first conductive layer, a second conductive layer, and an insulating layer disposed between the first conductive layer and the second conductive layer, wherein the first conductive layer and the second conductive layer are in different film layers, and the first conductive layer is electrically connected to the second conductive layer through a via;

[0023] According to one aspect of the present invention, the cascaded conductive structure includes a first wire and a second wire, the first wire and the second wire being located in the same film layer, and the first wire and the second wire being overlapped.

[0024] According to one aspect of the present invention, a first pixel driving circuit corresponding to a sub-pixel of the first display area is disposed in the second display area;

[0025] The circuit structure of the first pixel driving circuit corresponding to the sub-pixel of the first display area is any one of 1T circuit, 2T1C circuit, 3T1C circuit, 6T1C circuit, 6T2C circuit, 7T1C circuit, 7T2C circuit, or 9T1C circuit.

[0026] According to one aspect of the present invention, the first electrodes of a plurality of sub-pixels of the same luminous color in at least two first pixel units in the first display area are interconnected through the cascaded conductive structure, and the first pixel driving circuit synchronously drives the plurality of sub-pixels of the same luminous color to emit light synchronously.

[0027] Preferably, the cascaded conductive structure is disposed in the same layer as the first electrode or in a different film layer.

[0028] According to one aspect of the present invention, the first electrode of the first display area is a light-transmitting electrode;

[0029] According to one aspect of the present invention, the first electrode of the first display area is a reflective electrode;

[0030] According to one aspect of the present invention, the first electrode of the first display area includes an indium tin oxide layer or an indium zinc oxide layer;

[0031] According to one aspect of the present invention, the second electrode of the first display area includes a magnesium-silver alloy layer;

[0032] According to one aspect of the present invention, the second electrode of the first display area includes a patterned magnesium-silver alloy layer;

[0033] According to one aspect of the present invention, the orthographic projection of the light-emitting structure of the first display area on the substrate is composed of a first graphic unit or composed of two or more first graphic units spliced ​​together, wherein the first graphic unit includes at least one selected from the group consisting of circles, ellipses, dumbbells, gourds, and rectangles.

[0034] According to one aspect of the present invention, the orthographic projection of the first electrode of the first display area on the substrate is composed of a second graphic unit or composed of two or more second graphic units spliced ​​together, wherein the second graphic unit includes at least one selected from the group consisting of circles, ellipses, dumbbells, gourds, and rectangles.

[0035] Another object of the present invention is to provide a display device, characterized in that it comprises:

[0036] The aforementioned display panel;

[0037] A photosensitive element located on the non-display surface of the display panel, the photosensitive element being located in the first display area of ​​the display panel, and allowing light passing through the first display area to enter the photosensitive element.

[0038] According to one aspect of the present invention, the second display area at least partially surrounds the first display area, the second display area includes a plurality of second pixel units, each second pixel unit includes at least three colors of sub-pixels, and each sub-pixel includes a first electrode, a light-emitting structure and a second electrode arranged in sequence.

[0039] According to one aspect of the present invention, the display panel further includes a second pixel driving circuit electrically connected to the first electrode to drive the sub-pixels of the second pixel unit to emit light, wherein the second pixel driving circuit is electrically connected to the first electrode via a wire.

[0040] According to one aspect of the present invention, the second pixel driving circuit is disposed in the second display area, and the circuit structure of the second pixel driving circuit corresponding to the sub-pixel of the second display area is any one of 1T circuit, 2T1C circuit, 3T1C circuit, 6T1C circuit, 6T2C circuit, 7T1C circuit, 7T2C circuit, or 9T1C circuit.

[0041] According to an embodiment of the present invention, the light transmittance of the first display area is greater than that of the second display area, which allows a photosensitive component to be integrated on the back of the first display area, thereby achieving under-screen integration of a photosensitive component such as a camera. At the same time, the first display area can display an image, increasing the display area of ​​the display panel and realizing a full-screen design for the display device.

[0042] According to an embodiment of the present invention, the cascaded conductive structure formed by two conductive materials with different light transmittance in the first display area can balance the transmittance and diffraction issues of the first display area. By replacing the high-resistance transparent wires in the first display area with a mixed trace of high-resistance transparent wires and low-resistance opaque wires (TiAlTi or Mo), the trace resistance of the first display area is reduced, solving problems such as IR drop / RC delay in the display panel, and resolving issues such as uneven display and low brightness. Attached Figure Description

[0043] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals denote the same or similar features, and the drawings are not drawn to scale.

[0044] Figure 1 A top view schematic diagram of a display panel provided according to an embodiment of the present invention is shown;

[0045] Figure 2 A schematic diagram of the wire distribution used to drive sub-pixel emission in the prior art is shown; in order to reduce diffraction, the AA1 region is curved and the wires are not fully shown;

[0046] Figure 3 An example is provided. Figure 1 A schematic diagram of the wire distribution used to drive sub-pixel emission; in order to reduce diffraction, the AA1 region has been curved, and the wires in the AA1 region adopt a cascaded conductive structure, and the wires are not fully shown;

[0047] Figure 4 The first example provided is shown Figure 3 Detailed diagrams of the cascaded conductive structure; in Figure (A), both the horizontal and vertical conductors use cascaded conductive structures; in Figure (B), there are horizontal conductors that do not use cascaded conductive structures; and in Figure (C), there are vertical conductors that do not use cascaded conductive structures.

[0048] Figure 5 The diagram shows a cross-sectional view of a cascaded conductive structure in which first and second conductors in different layers are cascaded.

[0049] Figure 6 A schematic diagram showing the distribution of cascaded conductive structures and conventional wires in a sub-pixel is provided.

[0050] Figure 7 Another example is provided. Figure 2 A cross-sectional view of a cascaded conductive structure in which the first and second conductors are overlapped in the same layer;

[0051] Figure 8 Another example is provided. Figure 2 A cross-sectional view of a cascaded conductive structure in which the first and second conductors are connected by vias in different layers.

[0052] Figure 9 A cross-sectional view of an example display device is shown.

[0053] Explanation of reference numerals in the attached figures:

[0054] AA1 - First display area; AA2 - Second display area; NA - Non-display area;

[0055] 10 - First pixel unit; 20 - Second pixel unit;

[0056] 101 is the first sub-pixel; 201 is the second sub-pixel;

[0057] 108 - Package; 111 - Light-emitting structure; 112 - First electrode; 113 - Second electrode;

[0058] 301 - Substrate; 302 - Device layer; 303 - Pixel definition layer;

[0059] 3021 - Conductive layer; 3022 - Planarization layer; 3023 - First pixel driving circuit.

[0060] 30211 is the first conductive layer; 30212 is the second conductive layer; 30213 is the insulating layer. Detailed Implementation

[0061] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the invention.

[0062] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0063] It should be understood that when describing the structure of a component, when referring to a layer or region as being "above" or "on top of" another layer or region, it can mean that it is directly above the other layer or region, or that it contains other layers or regions between it and the other layer or region. Furthermore, if the component is flipped over, that layer or region will be located "below" or "under" the other layer or region.

[0064] In electronic devices such as mobile phones and tablets, it is necessary to integrate light-sensing components such as front-facing cameras, infrared light sensors, and proximity sensors on one side of the display panel. In some embodiments, a light-transmitting display area can be provided on the aforementioned electronic device, and the light-sensing components can be placed behind the light-transmitting display area, thereby achieving a full-screen display of the electronic device while ensuring that the light-sensing components function properly.

[0065] To improve the light transmittance of the light-transmitting display area and reduce diffraction caused by wires and components within the area, it is often necessary to use transparent wires, such as commonly used ITO wires, for the wires in the light-transmitting display area. However, existing technologies using transparent wires in the light-transmitting display area suffer from problems such as excessive sheet resistance, which can easily lead to dim light emission in the transparent display area, screen separation between the transparent and normal display areas, IR-drop, and RC delay. These problems are difficult or impossible to solve during subsequent Demura debugging.

[0066] To address the aforementioned problems, embodiments of the present invention provide a display panel and a display device. The following description, in conjunction with the accompanying drawings, will illustrate various embodiments of the display panel and the display device.

[0067] This invention provides a display panel, which may be an organic light-emitting diode (OLED) display panel.

[0068] like Figure 1As shown, the display panel 100 has a first display area AA1, a second display area AA2, and a non-display area NA surrounding the first display area AA1 and the second display area AA2. The light transmittance of the first display area AA1 is greater than that of the second display area AA2.

[0069] In this paper, the transmittance of the first display area AA1 is preferably greater than or equal to 15%. To ensure that the transmittance of the first display area AA1 is greater than 15%, or even greater than 40%, or even higher, in this embodiment, the transmittance of each functional film layer of the display panel 100 is greater than 80%, and at least some functional film layers have a transmittance greater than 90%.

[0070] According to the embodiment of the present invention, the light transmittance of the first display area AA1 is greater than that of the second display area AA2, so that the display panel 100 can integrate a photosensitive component on the back of the first display area AA1, realizing under-screen integration of a photosensitive component such as a camera. At the same time, the first display area AA1 can display an image, increasing the display area of ​​the display panel 100 and realizing a full-screen design of the display device.

[0071] The back of the first display area AA1 integrates a photosensitive component. The specific location, shape, and size of the first display area AA1 can be set according to the specific location, shape, and size of the photosensitive component.

[0072] like Figure 2 , Figure 5 , Figure 6 As shown, the first display area AA1 includes multiple first pixel units 10, and the second display area includes multiple second pixel units 20. Each first pixel unit includes two first sub-pixels 101 of a first color, two first sub-pixels of a second color, and two first sub-pixels of a third color. Each second pixel unit includes two second sub-pixels 201 of a first color, two second sub-pixels of a second color, and two second sub-pixels of a third color. Each first sub-pixel 101 includes a first electrode 112, a light-emitting structure 111, and a second electrode 113 stacked sequentially.

[0073] Within the first display area AA1, a first pixel driving circuit is electrically connected to the first electrode of the first sub-pixel 101 via a cascaded conductive structure 40, used to drive the first sub-pixel to emit light. In the illustration, the first pixel driving circuit is located within the second display area AA2.

[0074] By using a cascaded conductive structure of several transparent ITO and opaque M3 mixed traces in the first display area, the trace resistance can be reduced, thus solving display problems. The density of opaque traces in the mixed traces should be designed to be as low as possible to minimize or avoid the sacrifice of transparency while reducing trace resistance. The position or relative position of the opaque traces in the mixed traces can be optimized based on test results to reduce diffraction problems during photography. Furthermore, the opaque traces in the mixed traces can include structures such as perforations, which can further improve the light transmittance of the first display area AA1.

[0075] In some embodiments, the transparent conductive structure may be made of ITO.

[0076] In some embodiments, the display panel includes a substrate 301, and sub-pixels 101 are disposed on the substrate 301. The sub-pixels 101 include sub-pixels of three colors, namely sub-pixels of a first color, sub-pixels of a second color, and sub-pixels of a third color.

[0077] Please see Figures 2-4 to Figure 7 In the first display area AA1, the first pixel driving circuit is electrically connected to the first electrode of the sub-pixel through the cascaded conductive structure 40. The cascaded conductive structure may include at least the following configuration.

[0078] One configuration is that the cascaded conductive structure includes several segments of first conductor 401 and several segments of second conductor 402, with the first conductor and the second conductor being sequentially and electrically connected to form a cascade.

[0079] One configuration is that the cascaded conductive structure includes several segments of first conductors and several segments of second conductors, wherein the first conductors are sequentially electrically connected to each other to form a cascade, and the second conductors are connected in parallel with the cascade to conduct electricity.

[0080] One configuration is that the cascaded conductive structure includes several segments of first conductors and several segments of second conductors, with the second conductors sequentially electrically connected to form a cascade, and the first conductors connected in parallel with the cascade for conduction;

[0081] One configuration is that the cascaded conductive structure includes several segments of first conductors and several segments of second conductors, with the second conductors sequentially electrically connected to form a first-level cascade, and the first conductors are embedded between adjacent first-level cascades to form a second-level cascade;

[0082] One configuration is that the cascaded conductive structure includes several segments of first conductor 401 and several segments of second conductor 402. The first conductors are sequentially electrically connected to each other to form a first-level cascade, and the second conductors are embedded between adjacent first-level cascades to form a second-level cascade.

[0083] One configuration is that the cascaded conductive structure is a series or parallel structure of several secondary cascades.

[0084] Wherein, the light transmittance of the first conductor is greater than or equal to 80%; or the light transmittance of the first conductor is less than or equal to 40%.

[0085] The first wire is selected from transparent conductors made of ITO or IZO, and the second wire is selected from metallic conductors made of Ti / Al / Ti alloy or Mo.

[0086] The sheet resistance of the first conductor is above 20 ohms / square; the sheet resistance of the second conductor is below 1 ohm / square.

[0087] In some embodiments, the first electrode of the sub-pixel of the first display area AA1 is connected to the corresponding pixel circuit via a cascaded conductive structure. The first conductive wire used in the cascaded conductive structure can be a transparent conductive structure, such as ITO. The second conductive wire can be a Ti / Al / Ti alloy. The two are cascaded together and connected to the corresponding pixel circuit.

[0088] like Figure 7 As shown, the first sub-pixel 101 is connected to the corresponding pixel circuit (not shown) via a wire (cascaded conductive structure 3021). The cascaded conductive structure includes a first wire and a second wire, which are located in the same film layer and overlap. Having the first and second wires in the same film layer reduces the complexity of the fabrication process. Additionally, it improves the light transmittance of the entire first display area AA1. The pixel circuit controls the display of each sub-pixel via the corresponding wire (cascaded conductive structure 3021). For example, the wire (cascaded conductive structure 3021) employs a transparent conductive structure and a non-transparent conductive structure with low sheet resistance, improving the light transmittance of the first display area AA1 and reducing the impact on the display uniformity within the screen. In some embodiments, the pixel density of the first display area AA1 is relatively low, for example, 100 PPI or less, resulting in a larger spacing between sub-pixels, thus providing sufficient space for wire placement. Therefore, having the first and second wires in the same film layer is a suitable approach.

[0089] like Figure 8As shown, in some embodiments, the pixel density of the first display area AA1 is relatively high, for example, greater than 100 PPI, resulting in a smaller spacing between sub-pixels and insufficient space for wiring. In this case, the cascaded conductive structure can be configured as a three-dimensional structure, such as a first conductive layer 30211, a second conductive layer 30212, and an insulating layer 30213 disposed between the first and second conductive layers. The first and second conductive layers are located on different film layers, and the first conductive layer is electrically connected to the second conductive layer through a via. Because the cascaded conductive structure is located on a different film layer than the first electrode, diffraction generated by the cascaded conductive structure can be reduced, while the brightness uniformity of the panel can be improved, thereby reducing the complexity of the manufacturing process. To ensure the transmittance of the transparent display area and enable under-display imaging, the cascaded conductive structure of the first display area generally uses a mix of transparent non-metallic traces with high resistance (sheet resistance generally greater than 30Ω / cube) such as ITO and opaque metallic traces such as TiAlTi (sheet resistance generally less than 0.1Ω / cube). This solves the problems of excessive resistance of the signal lines in the first display area, significant Irdrop / RC delay, etc., which cause uneven display and low brightness.

[0090] In some embodiments, the first electrodes of several sub-pixels of the same emission color, having at least two first pixel units within the first display area, are interconnected through the cascaded conductive structure. The first pixel driving circuit synchronously drives the several sub-pixels of the same emission color to emit light synchronously. The first sub-pixel 101 is connected to the corresponding pixel circuit (not shown in the figure) through a wire (cascaded conductive structure 3021). The cascaded conductive structure includes a first wire and a second wire, which are located in the same film layer and overlap, thereby reducing the complexity of the fabrication process. In addition, due to the interconnection of the first electrodes, the number of cascaded conductive structures can be reduced, thereby improving the light transmittance of the entire first display area AA1.

[0091] In some embodiments, the first electrodes of several sub-pixels of the same luminous color, having at least two first pixel units within the first display area, are interconnected through the cascaded conductive structure. The first pixel driving circuit synchronously drives the several sub-pixels of the same luminous color to emit light synchronously. The first sub-pixel 101 is connected to the corresponding pixel circuit (not shown in the figure) via a wire (cascaded conductive structure 3021). The cascaded conductive structure includes a first conductive layer 30211, a second conductive layer 30212, and an insulating layer 30213 disposed between the first and second conductive layers. The first and second conductive layers are located in different film layers, and the first conductive layer is electrically connected to the second conductive layer through a via. Because the cascaded conductive structure is located in a different film layer than the first electrode, the uniformity of the display panel can be improved.

[0092] In some embodiments, such as Figures 4 to 9 As shown, the display panel includes a substrate 301, a device layer 302, and a pixel definition layer 303. The device layer 302 is located on the substrate 301, and the pixel definition layer 303 is located on the device layer 302. The first pixel driving circuit 3023 corresponding to each first sub-pixel of the first display area AA1 is located within the device layer 302 of the second display area AA2 (not shown in the figure). The device layer 302 includes a planarization layer 3022 and at least one conductive layer 3021, with the conductive layer 3021 located between the planarization layer 3022 and the substrate 301.

[0093] In some embodiments, at least one conductive layer 3021 forms a cascaded conductive structure within the first display area. The first pixel driving circuit 3023 is electrically connected to the first electrode of the first sub-pixel within the first display through this conductive layer. As shown, the conductive layer is electrically connected to the corresponding first electrode 112 via vias. The conductive layer 3021 can be the upper plate of a capacitor. Only a via structure needs to be formed in the fabrication process to connect the corresponding first electrode and the upper plate of the capacitor. Since the conductive layer is made of two conductive materials with different light transmittance, the fabrication process often requires step-by-step processing. The process of using the electrode plate and the first anode can easily form a cascade of transparent and opaque conductive materials, thereby simplifying the fabrication process.

[0094] In some embodiments, when the cascaded conductive structure in the first display area is disposed on the same layer as the first electrode 112, it may be located above the planarization layer 3022. When the cascaded conductive structure in the first display area is located below the first electrode 112, it may be located below the planarization layer 3022 and electrically connected to the corresponding first electrode 112 through a via.

[0095] In some embodiments, the second display area AA2 includes a plurality of second pixel units. Since there is no light transmittance requirement within the second display area, its leads can be conventional metal wires, such as Ti / Al / Ti wires. The first pixel driving circuit corresponding to the first sub-pixel of the first display area AA1 is disposed within the second display area AA2, and the second pixel driving circuit corresponding to the second sub-pixel driving the second display area AA2 is also disposed within the second display area AA2. It is understood that the number of pixel circuits corresponding to the sub-pixels of the first display area AA1 can be multiple, and each circuit is electrically connected to its corresponding sub-pixel.

[0096] In some embodiments, the circuit structure of the first pixel driving circuit and / or the second pixel driving circuit is any one of a 1T circuit, a 2T1C circuit, a 3T1C circuit, a 6T1C circuit, a 6T2C circuit, a 7T1C circuit, a 7T2C circuit, or a 9T1C circuit. In this document, a "2T1C circuit" refers to a pixel circuit that includes two thin-film transistors (T) and one capacitor (C), and so on for "7T1C circuit," "7T2C circuit," "9T1C circuit," etc.

[0097] According to the embodiment of the present invention, the pixel circuit for driving the display of each first sub-pixel is located in the second display area AA2, thereby reducing the wiring structure in the first display area AA1 and improving the light transmittance of the first display area AA1.

[0098] In some embodiments, as shown in the figure, the first pixel unit 10 includes two first sub-pixels 101 of a first color, two first sub-pixels of a second color, and two first sub-pixels of a third color. The first pixel units 10 are sequentially distributed along a first direction D1, and any two adjacent first sub-pixels 110 of the same emission color are staggered along a second direction D2 and also staggered along the first direction D1, where the first direction D1 intersects the second direction D2. Preferably, the first direction D1 is perpendicular to the second direction D2, and the first direction D1 can be a row direction or a column direction, and the corresponding second direction D2 can be a column direction or a row direction.

[0099] In some embodiments, as shown in the figure, the second pixel unit 20 includes two second sub-pixels 201 of a first color, two second sub-pixels 201 of a second color, and two second sub-pixels 201 of a third color. The second sub-pixels 201 are sequentially distributed along a first direction D1, and any two adjacent second sub-pixels 201 of the same emission color are staggered along a second direction D2 and also staggered along the first direction D1, where the first direction D1 intersects the second direction D2. Preferably, the first direction D1 is perpendicular to the second direction D2, and the first direction D1 can be a row direction or a column direction, and the corresponding second direction D2 can be a column direction or a row direction.

[0100] Any two adjacent sub-pixels arranged along the second direction D2 have different color orders. For example, such as... Figure 5 , 6 As shown, taking a first pixel unit 10 as an example, the color order of each sub-pixel arranged along the second direction D2 can be red sub-pixel, green sub-pixel, and blue sub-pixel. The color order of each sub-pixel arranged along the second direction D2 can be blue sub-pixel, red sub-pixel, and green sub-pixel.

[0101] This configuration ensures that the colors of adjacent sub-pixels in the second direction of the first display area AA1 are all different, and the distribution of sub-pixels of the same color is more uniform. This avoids the problem of uneven color distribution when the first display area AA1 is displayed due to multiple adjacent sub-pixels of the same color in a certain area, which would lead to a single-color bright bar in that area. This improves the display effect of the first display area AA1.

[0102] In some embodiments, the substrate 301 may be made of a light-transmitting material such as glass or polyimide (PI). The device layer 302 of the second display area AA2 may include pixel circuitry for driving the display of each sub-pixel. The pixel definition layer 303 includes a first pixel opening located in the first display area AA1. In some embodiments, the pixel definition layer 303 includes a second pixel opening located in the second display area AA2.

[0103] In some embodiments, each sub-pixel 101 includes a light-emitting structure 111, a first electrode 112, and a second electrode 113. The light-emitting structure 111 of the first display area AA1 is located within the opening of the first pixel, the first electrode 112 is located on the side of the light-emitting structure 111 facing the substrate 301, and the second electrode 113 is located on the side of the light-emitting structure 111 away from the substrate 301.

[0104] One of the first electrode 112 and the second electrode 113 is an anode and the other is a cathode. In this embodiment, the example of the first electrode 112 being the anode and the second electrode 113 being the cathode will be used for explanation.

[0105] The light-emitting structure 111 may include an OLED light-emitting layer, and may also include at least one of a hole injection layer, a hole transport layer, an electron injection layer, or an electron transport layer, depending on the design requirements of the light-emitting structure 111.

[0106] In some embodiments, the first electrode 112 is a light-transmitting electrode. In some embodiments, the first electrode 112 includes an indium tin oxide (ITO) layer or an indium zinc oxide layer. In some embodiments, the first electrode 112 is a reflective electrode, including a first light-transmitting conductive layer, a reflective layer located on the first light-transmitting conductive layer, and a second light-transmitting conductive layer located on the reflective layer. The first and second light-transmitting conductive layers can be ITO, indium zinc oxide, etc., and the reflective layer can be a metal layer, such as being made of silver.

[0107] In some embodiments, the second electrode 113 includes a magnesium-silver alloy layer. In some embodiments, the second electrode 113 may be interconnected as a common electrode.

[0108] In some embodiments, the orthographic projection of each light-emitting structure 111 of the first display area AA1 onto the substrate 301 is composed of a first graphic unit or composed of two or more first graphic units spliced ​​together. The first graphic unit includes at least one selected from the group consisting of circles, ellipses, dumbbells, gourds, and rectangles.

[0109] In some embodiments, the orthographic projection of each first electrode 112 of the first display area AA1 onto the substrate 301 is composed of a second graphic unit or composed of two or more second graphic units spliced ​​together. The second graphic unit includes at least one selected from the group consisting of circles, ellipses, dumbbells, gourds, and rectangles.

[0110] The aforementioned shape can alter the periodic structure generated by diffraction, thereby changing the distribution of the diffraction field and reducing the diffraction effect generated when external incident light passes through the first display area AA1, thus ensuring that the image captured by the camera located below the first display area AA1 has high clarity.

[0111] For example, the display panel 100 may also include an encapsulation layer 108 and a polarizer and a cover plate located above the encapsulation layer. Alternatively, the cover plate may be directly disposed above the encapsulation layer without the need for a polarizer, or at least the cover plate may be directly disposed above the encapsulation layer of the first display area AA1 without the need for a polarizer, thus avoiding the polarizer affecting the amount of light collected by the photosensitive element disposed below the corresponding first display area AA1. Of course, a polarizer may also be disposed above the encapsulation layer of the first display area AA1.

[0112] This invention also provides a display device, which may include the display panel 100 of any of the above embodiments. The following description uses one embodiment as an example, in which the display device includes the display panel 100 of the above embodiments.

[0113] Figure 9 This diagram shows a top view of a display device according to an embodiment of the present invention. In this embodiment, the display panel 100 may be the display panel 100 of one of the above embodiments. The display panel 100 has a first display area AA1 and a second display area AA2, wherein the light transmittance of the first display area AA1 is greater than the light transmittance of the second display area AA2.

[0114] The display panel 100 includes a first surface S1 and a second surface S2 opposite to each other, wherein the first surface S1 is the display surface. The display device also includes a photosensitive component 200, which is located on the second surface S2 side of the display panel 100 and corresponds to the position of the first display area AA1.

[0115] The photosensitive component 200 can be an image acquisition device used to acquire external image information. In this embodiment, the photosensitive component 200 is a complementary metal-oxide-semiconductor (CMOS) image acquisition device. In other embodiments, the photosensitive component 200 can also be a charge-coupled device (CCD) image acquisition device or other forms of image acquisition device. It is understood that the photosensitive component 200 is not limited to an image acquisition device. For example, in some embodiments, the photosensitive component 200 can also be an infrared sensor, a proximity sensor, an infrared lens, a flood illuminator, an ambient light sensor, and a dot projector, etc., light sensors. In addition, the display device can also integrate other components, such as a handset and a speaker, on the second surface S2 of the display panel 100.

[0116] According to the display device of the present invention, the light transmittance of the first display area AA1 is greater than that of the second display area AA2, so that the display panel 100 can integrate a photosensitive component 200 on the back of the first display area AA1, thereby realizing the under-screen integration of the photosensitive component 200 of an image acquisition device, and at the same time, the first display area AA1 can display images, thereby increasing the display area of ​​the display panel 100 and realizing the full-screen design of the display device.

[0117] According to the display device of the present invention, the first electrode of the sub-pixel in the first pixel unit 10 in the first display area AA1 is electrically connected through a cascaded conductive structure. This reduces the IR-drop of the traces in the first display area, thereby reducing the sheet resistance of the leads in the first display area AA1 and meeting the light transmittance requirements of the first display area AA1, thus reducing the impact on the photographic effect.

[0118] The embodiments of the present invention described above are not exhaustive, nor do they limit the invention to the specific embodiments described. Clearly, many modifications and variations can be made based on the above description. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to effectively utilize the invention and its modifications. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A display panel, characterized by, The display panel has a first display area and a second display area, the light transmittance of the first display area is greater than that of the second display area, and the first display area comprises: a plurality of first pixel units, each first pixel unit comprising at least three color sub-pixels, each sub-pixel comprising a first electrode, a light-emitting structure and a second electrode arranged in sequence; the display panel further comprises a first pixel driving circuit electrically connected with the first electrode to drive the sub-pixels of the first pixel unit to emit light, wherein the first pixel driving circuit is provided with a cascaded conductive structure, and / or the first pixel driving circuit is electrically connected with the first electrode through the cascaded conductive structure; in the first display area, the cascaded conductive structure is a cascade of at least two light transmittance conductive materials; the cascaded conductive structure comprises a plurality of first conductive lines and a plurality of second conductive lines, the first conductive lines are electrically connected in sequence to form a cascade, and the second conductive lines are connected in parallel with the cascade to conduct electricity; or the cascaded conductive structure comprises a plurality of first conductive lines and a plurality of second conductive lines, the second conductive lines are electrically connected in sequence to form a cascade, and the first conductive lines are connected in parallel with the cascade to conduct electricity; wherein the light transmittance of the first conductive line is greater than that of the second conductive line, and the first conductive line and the second conductive line are arranged in the same layer.

2. The display panel of claim 1, wherein: the light transmittance of the first conductive line is greater than or equal to 80%; and the light transmittance of the second conductive line is less than or equal to 40%. the sheet resistance of the first conductive line is greater than 20 ohms / square; and the sheet resistance of the second conductive line is less than 1 ohm / square.

3. The display panel of claim 1, wherein: the display panel further comprises: a substrate; a device layer on the substrate, comprising a planarization layer and at least one conductive layer between the substrate and the planarization layer; wherein the at least one conductive layer is the cascaded conductive structure, and the cascaded conductive structure is electrically connected with the corresponding first electrode through a via.

4. The display panel of claim 3, wherein: the cascaded conductive structure comprises a first conductive layer, a second conductive layer and an insulating layer arranged between the first conductive layer and the second conductive layer, the first conductive layer and the second conductive layer are in different film layers, and the first conductive layer is electrically connected with the second conductive layer through a via.

5. The display panel of claim 3, wherein: the first conductive line and the second conductive line are overlapped.

6. The display panel of claim 1, wherein: the first pixel driving circuit corresponding to the sub-pixel of the first display area is arranged in the second display area; the circuit structure of the first pixel driving circuit corresponding to the sub-pixel of the first display area is any one of a 2T1C circuit, a 3T1C circuit, a 6T1C circuit, a 6T2C circuit, a 7T1C circuit, a 7T2C circuit or a 9T1C circuit.

7. The display panel of claim 1, wherein: The first electrodes of the same light-emitting color sub-pixels of the at least two first pixel units in the first display area are interconnected by the cascade conductive structure, and the first pixel driving circuit synchronously drives the same light-emitting color sub-pixels to synchronously emit light.

8. The display panel of claim 1, wherein, The first electrode of the first display area is a light-transmitting electrode. The first electrode of the first display area comprises an indium tin oxide layer or an indium zinc oxide layer.

9. A display device, characterized by comprising: The display panel of any one of claims 1 to 8; A light-sensing element located on a non-display surface of the display panel, the light-sensing element corresponding to the first display area of the display panel and allowing light passing through the first display area to enter the light-sensing element. ​

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