Display panel and display device

Abstract

The display panel comprises an anode layer, a light-emitting layer and a first functional layer, the first functional layer is located on the side, away from the anode layer, of the light-emitting layer, the first functional layer comprises functional units arranged in an array mode, each functional unit comprises a touch electrode block and a cathode block, and a gap exists between the touch electrode block and the cathode block. The touch electrode blocks are insulated from the cathode blocks; the display panel further comprises sub-pixels arranged in an array mode, the cathode blocks comprise first connecting parts and island-shaped parts corresponding to the sub-pixels, and the first connecting parts are used for connecting at least two adjacent island-shaped parts. The connecting part can provide a surplus space for connection of the island-shaped part and the cathode transmission line, and the cathode block and the cathode transmission line can be connected at the position of the connecting part, so that normal display of the display panel can be ensured while the capacitive load of the touch electrode is reduced as much as possible.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and more particularly to a display panel and display device. Background Technology

[0002] In the field of touch display technology, in order to further reduce the thickness of the display, the touch electrodes are usually placed below the encapsulation layer, that is, embedded touch technology is used to realize the touch function of the display panel.

[0003] The highly integrated design of embedded touchscreens facilitates structural thinning and high transmittance. To achieve in-cell touch technology, the cathode layer of the display panel is typically patterned, with some cathodes used as display electrodes and others as touch electrodes. However, since the touch electrodes are on the same layer as the display cathodes, the capacitive load on the touch electrodes increases, negatively impacting touch performance.

[0004] Therefore, how to reduce the capacitive load of the touch electrodes while maintaining the display performance of the embedded touch screen has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] To address the aforementioned technical problems, this disclosure provides a display panel and display device for reducing the capacitive load of the touch electrodes while maintaining display performance.

[0006] This disclosure provides a display panel, including: an anode layer, a light-emitting layer, and a first functional layer. The first functional layer is located on the side of the light-emitting layer opposite to the anode layer. The first functional layer includes functional units arranged in an array. Each functional unit includes a touch electrode block and a cathode block. There is a gap between the touch electrode block and the cathode block, and the touch electrode block and the cathode block are insulated from each other. The display panel also includes sub-pixels arranged in an array. The cathode block includes a first connecting portion and an island-shaped portion corresponding to the sub-pixel, wherein the first connecting portion is used to connect at least two adjacent island-shaped portions.

[0007] Based on the same inventive concept, this disclosure provides a display device, including the display panel as described above.

[0008] Compared with the prior art, the technical solution provided in this disclosure has the following advantages: This disclosure provides a display panel and display device, including: an anode layer, a light-emitting layer, and a first functional layer. The first functional layer is located on the side of the light-emitting layer opposite to the anode layer. The first functional layer includes arrayed functional units, each functional unit including a touch electrode block and a cathode block. There is a gap between the touch electrode block and the cathode block, and the touch electrode block and the cathode block are insulated from each other. The display panel also includes arrayed sub-pixels. The cathode block includes a first connecting portion and an island-shaped portion corresponding to the sub-pixel. The first connecting portion is used to connect at least two adjacent island-shaped portions. By providing a connecting portion between adjacent island-shaped portions, leeway space can be provided for the connection between the island-shaped portion and the cathode transmission line. The cathode block and the cathode transmission line can be connected together at the connecting portion position by means of laser drilling or undercut structure, which can ensure the normal display of the display panel while minimizing the capacitive load of the touch electrode. Attached Figure Description

[0009] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0010] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 The figure shown is a plan view of a first functional layer provided in an embodiment of this disclosure; Figure 2 As shown Figure 1 Enlarged schematic diagram of the functional unit; Figure 3 As shown Figure 2 An enlarged schematic diagram of the first sub-block; Figure 4 As shown Figure 3 A schematic diagram of the cross-section along the A-A' direction; Figure 5 As shown Figure 2 Another enlarged schematic diagram of the first sub-block; Figure 6 As shown Figure 2 Another enlarged schematic diagram of the first sub-block; Figure 7 As shown Figure 2 Another enlarged schematic diagram of the first sub-block; Figure 8 The diagram shown is a partial layout of a first sub-block according to an embodiment of this disclosure; Figure 9 As shown Figure 8 A schematic diagram of the cross-section along the B-B' direction; Figure 10 The diagram shown is a connection schematic of a touch electrode provided in an embodiment of this disclosure; Figure 11 The figure shown is a plan view of a display device provided in an embodiment of this disclosure. Detailed Implementation

[0012] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0013] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0014] Figure 1 The figure shown is a plan view of a first functional layer provided in an embodiment of this disclosure. Figure 2 As shown Figure 1 Enlarged schematic diagram of the functional unit. Figure 3 As shown Figure 2 An enlarged schematic diagram of the first sub-block. Figure 4 As shown Figure 3 Please refer to the cross-sectional diagram along the A-A' direction. Figures 1 to 4 This disclosure provides a display panel 100, including: an anode layer 30, a light-emitting layer 20, and a first functional layer 10. The first functional layer 10 is located on the side of the light-emitting layer 20 opposite to the anode layer 30. The first functional layer 10 includes an array of functional units 11, each functional unit 11 including a plurality of first sub-blocks 12. Each first sub-block 12 includes a touch electrode block 15 and a cathode block 13. There is a gap 00 between the touch electrode block 15 and the cathode block 13, and the touch electrode block 15 and the cathode block 13 are insulated. That is to say, the touch electrode block 15 in this disclosure is embedded and is on the same layer as the cathode block 13 to realize the touch function of the display panel 100.

[0015] Please combine Figure 4The cathode block 13 in the first functional layer 10 can serve as the source of electron injection. Under the action of the electric field, the electrons on the cathode surface gain sufficient energy to overcome the work function and transition to form free electrons. The anode layer 30 serves as the source of hole injection. Under the action of the electric field, the electrons in the anode are taken away to form positively charged holes. Holes and electrons recombine in the light-emitting layer 20 to form electron-hole pairs. The electron-hole pairs emit fluorescence through radiative transitions to achieve the display of the display panel 100.

[0016] Integrating the cathode block 13 for display and the touch electrode block 15 for sensing into the same first functional layer 10 forms an embedded touch, eliminating the need for a separate touch layer in the display panel 100, thus reducing the overall thickness and weight of the display panel 100. Because the cathode block 13 and the touch electrode block 15 are manufactured simultaneously or nearly simultaneously in the same functional layer using a patterning process, the number of process steps and alignment errors can be reduced, improving production efficiency and product yield. The design of the touch electrode block 15 and the cathode block 13 with spacing and insulation ensures that they can operate independently during display and touch operation, effectively suppressing interference from the display to the touch.

[0017] The display panel 100 also includes sub-pixels P arranged in an array, wherein the sub-pixels P include red sub-pixels, blue sub-pixels, and green sub-pixels. Figure 4 The illustration only shows one subpixel P and does not represent the actual number of subpixels P contained in the display panel 100. The display panel 100 also includes a driving layer 40, which includes a plurality of transistors T, used to drive the subpixel P to emit light.

[0018] Please combine Figure 3 and Figure 4 The cathode block 13 includes a first connecting portion 16 and an island-shaped portion 14 corresponding to the cathode of the sub-pixel P. The first connecting portion 16 is used to connect at least two adjacent island-shaped portions 14. Specifically, each sub-pixel P includes an anode, a light-emitting layer 20, and a cathode. The cathode of each sub-pixel P is an island-shaped portion 14, and different sub-pixels P correspond to different island-shaped portions 14. The cathode block 13 includes island-shaped portions 14 and a first connecting portion 16. The first connecting portion 16 is used to connect at least two adjacent island-shaped portions 14. That is, the first connecting portion 16 in the cathode block 13 connects at least two different island-shaped portions 14 corresponding to sub-pixels P together to form a larger cathode block 13. In the same first sub-block 12, the part other than the cathode block 13 is the touch electrode block 15 and the gap 00. The cathode block 13 and the touch electrode block 15 include the gap 00. The independent island-shaped portion 14 has no space to connect with the first voltage signal line 04 to transmit the cathode signal. Therefore, this application proposes to connect it to the first voltage signal line 04 through the first connecting portion 16.

[0019] Thus, by connecting the island-shaped portions 14 corresponding to at least two adjacent sub-pixels P to form a cathode block 13, the first connecting portion 16 can provide leeway for the connection between the island-shaped portion 14 and the first voltage signal line 04, thereby realizing the connection between the cathode block 13 and the first voltage signal line 04, which can reduce the capacitive load of the touch electrode while ensuring the normal display of the display panel 100.

[0020] Please refer to Figure 3 This disclosure provides a display panel 100, wherein a first connecting portion 16 connects two island-shaped portions 14 of different sizes, and the island-shaped portions 14 of different sizes correspond to the cathodes of sub-pixels P of different colors.

[0021] Different color sub-pixels P have different luminous efficiencies and electrical characteristics, therefore, the cathode sizes of different color sub-pixels P are different. For example, to reduce the current density during actual operation or to increase its lifespan, the blue sub-pixel, which has lower luminous efficiency or a higher driving voltage, has a larger cathode area; while the green sub-pixel, which has higher luminous efficiency or requires less current, has a smaller cathode area. This differentiated design of the cathode size of different color sub-pixels P allows for fine control of the current injection characteristics of different color sub-pixels P under the same driving conditions through the differentiated island-shaped portion 14, compensating for the inherent differences in the luminescent materials, improving the uniformity and color accuracy of the displayed image, and optimizing luminous efficiency while maintaining high reliability, thereby achieving the effect of reducing power consumption.

[0022] The cathode block 13 includes a first connecting portion 16 and at least two adjacent island-shaped portions 14. Island-shaped portions 14 of different sizes correspond to the cathodes of sub-pixels P of different colors. The two island-shaped portions 14 connected by the first connecting portion 16 are of different sizes; that is, the cathodes of the sub-pixels P connected by the first connecting portion 16 are different. By connecting the island-shaped portions 14 corresponding to the cathodes of different sub-pixels P into a large cathode block 13, as mentioned above, leeway can be provided for the connection between the island-shaped portions 14 and the first voltage signal line 04. This reduces the parasitic capacitance between the touch electrode and the display cathode while ensuring the display effect of the display panel 100.

[0023] The island-shaped portions 14 of different sizes are connected by the first connecting portion 16 to form an integral low-resistance network, which helps to obtain a uniform and stable potential for the island-shaped portions 14 of different sizes, reduce color unevenness, and improve display uniformity.

[0024] Thus, the first connecting portion 16 connects two island-shaped portions 14 of different sizes, which can improve display uniformity while providing space for the island-shaped portions 14 to connect with the first voltage signal line 04. For example, the cathode block 13 and the first voltage signal line 04 can be connected together at the connecting portion position by means of laser drilling or undercutting structure, etc. Figure 3The connection structure, including the second sub-connection part 162 at the corner, helps to avoid other display signals and optimize touch signal transmission.

[0025] Figure 5 As shown Figure 2 Please refer to another enlarged diagram of the first sub-block. Figure 3 and Figure 5 This disclosure provides a display panel 100, wherein the cathode block 13 includes a first island cathode 131 and / or a second island cathode 132. Please refer to... Figure 5 The first island cathode 131 includes a first sub-connection portion 161, which overlaps with the center line L connecting the two different island portions 14; please refer to Figure 3 The second island cathode 132 includes a second sub-connection portion 162, which is located on the same side of the center line L connecting the two different island portions 14.

[0026] In one optional embodiment provided in this disclosure, the cathode block 13 includes a first island cathode 131. For example, the first island cathode 131 may be... Figure 5 The connection method in the middle, Figure 5 Different sized island-shaped portions 14 are connected by a first sub-connector 161, and the first sub-connector 161 overlaps with the center line L connecting two different island-shaped portions 14. The distance between the center lines L of the different sized island-shaped portions 14 is the shortest. By setting the first sub-connector 161 to overlap with the center lines L of the different island-shaped portions 14 it connects to, that is, the first sub-connector 161 is on the shortest or most direct path of current flow, the current path can be shortened and the potential uniformity of the cathode block 13 can be improved.

[0027] In another alternative embodiment provided in this disclosure, the cathode block 13 includes a second island cathode 132. For example, the second island cathode 132 may be... Figure 3 The connection method in the middle, Figure 3 Different sized island-shaped portions 14 are connected by a second sub-connector 162. The second sub-connector 162 does not overlap with the center line connecting the two different island-shaped portions 14 it connects to, and the second sub-connector 162 is located on the same side of the center line L connecting the two different island-shaped portions 14. Specifically, the second sub-connector 162 includes a corner, that is, the second sub-connector 162 between island-shaped portions 14 of different sizes is not the shortest connection path. In the first functional layer 10, there is a gap and insulation between the cathode block 13 and the touch electrode block 15. This connection structure including a corner can be used to avoid other structures and optimize touch signal transmission.

[0028] In another alternative embodiment provided in this disclosure, the cathode block 13 may include both a first island cathode 131 and a second island cathode 132. These two different connection structures can be used alternately or in sections within the array to precisely shape the contour of the cathode block 13. The contour of the cathode block 13, together with the adjacent touch electrode block 15, determines the shape and distribution of the touch-sensing capacitor. This complex geometric design helps to balance the noise impact of the display driver on touch sensing, thereby improving the signal-to-noise ratio and sensitivity of the touch.

[0029] Thus, by designing sub-first connection portions 16 with different geometries in the cathode block 13, optimal space can be reserved for highly integrated touch electrode blocks 15 or other functions while ensuring the overall low resistance and potential uniformity of the display cathode, thereby achieving synergistic optimization of display performance, touch performance and manufacturing yield.

[0030] Please refer to Figure 2 , Figure 3 and Figure 5 This disclosure provides a display panel 100, wherein the functional unit 11 includes a plurality of first sub-blocks 12, and any first sub-block 12 includes at least one first island cathode 131 and / or at least one second island cathode 132.

[0031] Optionally, such as Figure 5 As shown, the first sub-block 12 may consist of only a plurality of first island cathodes 131, or, as... Figure 3 As shown, the first sub-block 12 may include only a plurality of second island cathodes 132, or the first sub-block 12 may include at least one first island cathode 131 and at least one second island cathode 132. This disclosure does not limit the number and type of island cathodes in the first sub-block 12, and can be set according to actual needs.

[0032] When the first sub-block 12 includes island-shaped cathodes of the same type, the first functional layer 10 includes repeating functional units 11 and smaller first sub-blocks 12. This modular and hierarchical structural division allows for periodicity and regularity in the design and wiring of the first functional layer 10, simplifying the design complexity of large-scale arrays and reducing manufacturing difficulty. Modular design also facilitates the isolation and repair of local defects; when a defect occurs in a sub-block or functional unit 11, the problem area can be more easily located and isolated. Simultaneously, the repeating first sub-block 12 design improves the stability of the manufacturing process, thus increasing production yield.

[0033] Furthermore, different first sub-blocks 12 can contain different types of island cathodes. For example, one first sub-block 12 includes a first island cathode 131, and another first sub-block 12 includes a second island cathode 132. That is, different island cathode structures are integrated in different first sub-blocks 12, which can make differentiated designs for different areas of the display panel 100, flexibly adapt to complex functional requirements, and achieve more refined power consumption management.

[0034] Thus, by setting the interior of the first sub-block 12 to include at least one island-shaped cathode, it helps to accurately define the geometric boundaries of the touch electrode block 15, simplify the design, improve process stability, and flexibly adapt to complex design requirements.

[0035] Please refer to Figure 3 In a display panel 100 provided in this disclosure, the second island cathodes 132 in a first sub-block 12 are not connected to each other.

[0036] Specifically, the first sub-block 12 includes a plurality of second island cathodes 132. The plurality of second island cathodes 132 are independent of each other in the same first sub-block 12. Each second island cathode 132 connects two adjacent different island portions 14 through a second sub-connecting portion 162. Different island portions 14 correspond to cathodes of different color sub-pixels P. The second sub-connecting portion 162 is located on the same side of the line L connecting the centers of different island portions 14. Figure 3 The illustration only shows the case where the second sub-connector 162 is located below the center line L of the different island sections 14. Optionally, the second sub-connector 162 may also be located above the center line L of the different island sections 14. This disclosure does not limit this to the case.

[0037] In this embodiment, by using the second sub-connecting part 162 to connect different island-shaped parts 14 to form a second island-shaped cathode 132, a connection space can be provided between the island-shaped parts 14 and the first voltage signal line 04, and the parasitic capacitance between the cathode block 13 and the touch electrode block 15 can be minimized. Simulation results show that the parasitic capacitance between a single touch electrode and the display cathode in this embodiment is 118pF. Compared with the parasitic capacitance between the display cathode and the touch electrode in related technologies, the capacitance value of the parasitic capacitance obtained by simulation in this embodiment is smaller. This indicates that connecting different island-shaped parts 14 to form a second island-shaped cathode 132 can realize the connection between the cathode block 14 and the first voltage signal line 04, effectively reduce the parasitic capacitance between the display cathode and the touch electrode, and improve touch performance.

[0038] Furthermore, the second island cathodes 132 within the same first sub-block 12 are independent of each other, which reduces the complexity of the island cathode structure, making the vapor deposition process simpler and more reliable, and improving manufacturing yield. Optionally, the second island cathodes 132 within one first sub-block 12 can share a single cathode transmission line to obtain cathode signals, or multiple second island cathodes 132 within multiple first sub-blocks 12 can share a single cathode transmission line to obtain cathode signals. Optionally, a metal mesh can be provided in the driving layer 40 to simultaneously transmit cathode signals to multiple independent second island cathodes 132.

[0039] Please continue to refer to this. Figure 3 This disclosure provides a display panel 100 in which a second island cathode 132 is arranged along the row direction and / or column direction in a first sub-block 12.

[0040] Optionally, the second island cathode 132 may be arranged along the row direction, or the second island cathode 132 may be arranged along the column direction, or the second island cathode 132 may be arranged along both the row and column directions. Figure 3 The illustration is based solely on the example of the second island cathode 132 being arranged simultaneously along both the row and column directions; this disclosure does not limit this to any particular case.

[0041] The touch electrode blocks 15 are typically arranged along the row and column directions. When the second island cathode 132 is arranged regularly along the row and / or column directions, the capacitive sensing network formed between the second island cathode 132 and the touch electrode blocks 15 also presents a regular row or column array. The regular row or column array helps to suppress the propagation of display driving noise in a specific direction, which can enhance the isolation effect between the cathode block 13 and the touch electrode blocks 15, thereby improving touch performance.

[0042] Furthermore, in traditional sub-pixel P arrangements, the island-shaped portions 14 corresponding to the cathodes of sub-pixels P are arranged periodically along the row or column direction. This arrangement of island-shaped portions 14 is compatible with existing driving circuits and pixel structures, without requiring large-scale modifications to the underlying transistors T and wiring. The row and column direction arrangement allows the second island-shaped cathode 132 to maintain the same direction as the existing signal lines on the driving layer 40. For example, gate lines are usually aligned with the row direction, and data signal lines 01 are usually aligned with the column direction. This facilitates the parallel routing of the cathode traces of the island-shaped cathode or the traces of the touch electrode block 15 with the existing signal lines in the driving layer 40, making the wiring more regular, reducing intersections and conflicts between traces, and improving wiring density and efficiency.

[0043] In the vapor deposition process, more precise and stable pattern alignment along the row or column direction is beneficial to improving process accuracy and reducing yield loss caused by pattern misalignment.

[0044] Thus, by arranging the second island cathode 132 along the row and / or column directions, it is beneficial to arrange the wiring in a regular manner, and it can also improve the pattern alignment accuracy and wiring regularity in the manufacturing process, thereby increasing production efficiency.

[0045] Please refer to Figure 3 and Figure 5 This disclosure provides a display panel 100, in which at least one of a first island cathode 131 and a second island cathode 132 is located on the diagonal of the first sub-block 12.

[0046] For example, Figure 5 The first island cathode 131 is located on the diagonal of the first sub-block 12. Figure 3 The second island cathode 132 is located on the diagonal of the first sub-block 12. In other embodiments, the first sub-block 12 may also include a first island cathode 131 and a second island cathode 132, and at least one of the first island cathode 131 and the second island cathode 132 is located on the diagonal of the first sub-block 12. In this disclosure, the first sub-block 12 is divided in a rectangular form. In some other embodiments, the first sub-block 12 may also be a square, pentagon, hexagon, etc. This disclosure does not limit the division area of ​​the first sub-block 12.

[0047] The first island cathode 131 and the second island cathode 132 are located on the diagonal of the first sub-block 12. When the first island cathode 131 needs to be connected to other island cathodes, multiple island portions 14 can be concentrated to form a large cathode block 13 with the shortest path. This reduces the perimeter of the gap between the display cathode and the touch electrode to reduce parasitic capacitance, and also shortens the current transmission path within the first sub-block 12, which helps to reduce the resistance of the current within the first sub-block 12 and improve the potential uniformity of the cathode block 13. When the second island cathode 132 is not connected to other island cathodes, by placing the second island cathode 132 on the diagonal of the first sub-block 12, it is beneficial to achieve a regular arrangement of the second island cathode 132, reduce the complexity of the vapor deposition process, and improve process stability.

[0048] Thus, by placing at least one of the first island cathode 131 and the second island cathode 132 on the diagonal of the first sub-block 12, the complexity of the vapor deposition process can be reduced, the process stability can be improved, and multiple first island cathodes 131 can be concentrated to form a large cathode block 13 with the shortest path, reducing the perimeter of the interval 00 and reducing the parasitic capacitance between the display cathode and the touch electrode.

[0049] Please refer to Figure 5 This disclosure provides a display panel 100, in which at least one first island cathode 131 is connected to an adjacent first island cathode 131 in the first sub-block 12.

[0050] In this embodiment, by adjusting the cathode segmentation pattern, at least one first island cathode 131 is connected to an adjacent first island cathode 131, and the connected first island cathodes 131 can form a large cathode block 13. Figure 5 The perimeter ratio of the cathode block 13 of Zhongda Figure 3 The sum of the perimeters of the multiple independent second island cathodes 132 is smaller, and correspondingly, Figure 5 The perimeter of the gap between the cathode block 13 and the touch electrode block 15 is less than 00. Figure 3 The total length of the spacing 00 between multiple independent second island-shaped cathodes 132 and the touch electrode block 15. In the electric field distribution, the edge portion of the cathode block 13 is prone to a strong edge effect due to charge concentration and bending of the electric field lines, thereby increasing the parasitic capacitance between it and the touch electrode block 15. This embodiment reduces the edge effect between the cathode block 13 and the touch electrode block 15 by reducing the overall perimeter of the display cathode, which can reduce the concentration of charge at the edge of the cathode block 13, thereby reducing the parasitic capacitance between the touch electrode and the display cathode, thus reducing the capacitive load of the touch electrode and improving touch performance. Simulation experiments show that, under the same touch electrode size, the parasitic capacitance between a single touch electrode and the display cathode can be reduced to 68pF. Compared to Figure 3 The parasitic capacitance of 118pF between a single touch electrode and the display cathode is obtained through simulation. The connection method in this embodiment can further reduce the parasitic capacitance between the cathode block 13 and the touch electrode block 15.

[0051] Connecting at least one first island cathode 131 to an adjacent first island cathode 131 can optimize the geometric design of the first connection part 16 and reduce the resistance of the cathode block 13, ensuring the overall potential uniformity of the cathode block 13, effectively suppressing local brightness or color unevenness, and improving image quality uniformity.

[0052] Furthermore, the current in the interconnected first island cathodes 131 can compensate for the local defects of a single island cathode or its driving circuit within the first sub-block 12. If the current path of a certain sub-pixel P is damaged, the connection of adjacent first island cathodes 131 can provide redundant current paths, thereby improving the overall functional reliability of the cathode block 13.

[0053] Thus, by connecting at least one first island cathode 131 in the first sub-block 12 to an adjacent first island cathode 131, the parasitic capacitance between the touch electrode block 15 and the cathode block 13 can be further reduced while maintaining the isolation between the cathode block 13 and the touch electrode block 15. This also ensures the electrical connectivity between adjacent sub-pixels P within a single first sub-block 12, suppresses cathode potential fluctuations, guarantees the uniformity of the displayed image, and improves the overall functional reliability.

[0054] It should be noted that the arrangement of sub-pixels P in this embodiment is illustrated using a windmill arrangement as an example. A windmill arrangement is a double trapezoidal arrangement composed of red, green, and blue sub-pixels. By sharing corner areas, the double trapezoidal arrangement reduces the ineffective space between pixels, allowing more effective pixels to be accommodated in the same area, thereby improving resolution and display detail. Optionally, the sub-pixels P in this embodiment can also be arranged in other ways, such as real RGB, diamond arrangement, etc. This disclosure does not limit this; the connection between the island portion 14 and the first connecting portion 16 can be adjusted according to the actual arrangement of the sub-pixels P.

[0055] Figure 6 As shown Figure 2 Another enlarged schematic diagram of the first sub-block. Figure 7 As shown Figure 2 Please refer to another enlarged diagram of the first sub-block. Figure 6 and Figure 7 In a display panel 100 provided in this disclosure, the cathode block 13 further includes a third island cathode 133. The third island cathode 133 includes a second connecting portion 17, which connects at least three adjacent island portions 14. For example, the second connecting portion 17 can connect three adjacent island portions 14, or it can connect four adjacent island portions 14, or it can connect five adjacent island portions 14, etc. This disclosure does not limit the number of island portions 14 connected by the second connecting portion 17 in the third island cathode 133; the connection can be made according to actual needs. Figure 6 The illustration only takes the second connecting part 17 connecting four adjacent island-shaped parts 14 as an example. Figure 7 The illustration will only take the second connecting part 17 connecting 6 adjacent island parts 14 as an example.

[0056] The first island cathode 131 connects only two different island portions 14 through the first connecting portion 16. In this case, the total length of the interval 00 between the display cathode and the touch electrode block 15 is relatively large. In this embodiment, the second connecting portion 17 connects at least three adjacent island portions 14 together, which can further reduce the perimeter of the interval 00 between the display cathode and the touch electrode block 15, thereby reducing the parasitic capacitance between the cathode block 13 and the touch electrode block 15. Simulation experiments show that... Figure 6 With the same touch electrode size, the parasitic capacitance between a single touch electrode and the display cathode can be further reduced to 52pF.

[0057] The second connecting portion 17 connects at least three adjacent island portions 14, which can shorten the current path to the greatest extent, reduce resistance, and improve the potential stability between the connected island portions 14. Compared with the first connecting portion 16 in the aforementioned embodiment, which only connects two adjacent island portions 14, the second connecting portion 17 connects at least three adjacent island portions 14, and has a stronger ability to suppress color unevenness. Similarly, when any island portion 14 connected by the second connecting portion 17 or the first connecting portion 16 has a local defect, the current can still obtain a stable potential from the other two or more adjacent island portions 14 through the second connecting portion 17, which can improve the reliability and defect resistance of the display panel 100.

[0058] Thus, by connecting at least three adjacent island portions 14 with the second connecting portion 17 in the third island cathode 133, the total length of the interval 00 can be reduced, thereby reducing the parasitic capacitance between the cathode block 13 and the touch electrode block 15, and also enhancing the conductivity and potential uniformity of the cathode, improving image quality, and increasing the resistance to defects.

[0059] It should be noted that with this connection method, the area of ​​the cathode block 13 needs to be considered. If the area of ​​the cathode block 13 is too large, it may affect the amount of touch sensing signal.

[0060] Please refer to Figures 5 to 7 This disclosure provides a display panel 100 in which all island portions 14 in a first sub-block 12 are connected to each other via a first connecting portion 16 and / or a second connecting portion 17.

[0061] Optionally, all island-shaped portions 14 in a first sub-block 12 are connected to each other via a first connecting portion 16, wherein, please refer to Figure 5 All island-shaped portions 14 in the first sub-block 12 can be connected to each other via the first sub-connecting portion 161, or via the second sub-connecting portion 162, or via both the first sub-connecting portion 161 and the second sub-connecting portion 162; or, all island-shaped portions 14 in a first sub-block 12 can be connected to each other via the second connecting portion 17, or, please combine Figure 6 and Figure 7 All island-shaped portions 14 in a first sub-block 12 are connected to each other through a first connecting portion 16 and a second connecting portion 17. This disclosure does not limit the connection method of the island-shaped portions 14 in the first sub-block 12, as long as they are connected to each other.

[0062] The interconnected island-shaped portions 14 in the first sub-block 12 can form a completely interconnected electrical whole. That is, the cathodes of all sub-pixels P within the first sub-block 12 can share an extremely low resistance and a uniform cathode potential. Furthermore, all island-shaped portions 14 in the same first sub-block 12 can obtain the same cathode potential through only a single cathode transmission line. This reduces the number of cathode transmission lines, simplifies wiring, helps reduce manufacturing costs, and improves production efficiency. At the same time, the reduction of cathode transmission lines also helps reduce electromagnetic or signal interference. The specific shapes of the first sub-connecting portion 161 and the second sub-connecting portion 162 allow the connected island-shaped portions 14 to form specific cathode blocks 13, resulting in a regular arrangement of cathode blocks 13 in different first sub-blocks 12. This is beneficial for mass production in the manufacturing process and reduces production costs.

[0063] Thus, by arranging all the island-shaped portions 14 in the first sub-block 12 to be interconnected, the parasitic capacitance between the cathode block 13 and the touch electrode block 15 can be reduced, and the arrangement of cathode transmission lines can be further reduced, which simplifies wiring and reduces electromagnetic or signal interference.

[0064] Figure 8 The diagram shown is a partial layout of a first sub-block according to an embodiment of this disclosure. Please refer to it. Figure 4 and Figure 8 This disclosure provides a display panel 100, which further includes a data signal line 01 for transmitting data signals to a sub-pixel P; along a direction perpendicular to the plane of the display panel 100, a cathode block 13 at least covers a portion of the data signal line 01, or a gap 00 overlaps with at least a portion of the data signal line 01.

[0065] Data signal lines 01 are used to transmit high-frequency, varying voltage or current signals to sub-pixels P. These signal variations can generate electromagnetic interference. The cathode block 13, typically made of metal or highly conductive material, acts as a shielding layer. When the cathode block 13 covers at least a portion of the data signal lines 01 in a direction perpendicular to the plane of the display panel 100, the overlap area between the data signal lines 01 and the touch electrodes is reduced, thereby reducing electromagnetic interference from the data signal lines 01 to the touch electrodes and improving touch performance. Similarly, a gap 00 exists between the cathode block 13 and the touch electrode block 15. This gap 00 overlaps with at least a portion of the data signal lines 01 in a direction perpendicular to the plane of the display panel 100, similarly reducing the overlap area between the data signal lines 01 and the touch electrodes, reducing electromagnetic interference to the touch electrodes, and improving touch performance.

[0066] For example, please refer to Figure 4The data signal line 01 can be disposed in the fourth metal layer M4, the third metal layer M3, or both the fourth metal layer M4 and the third metal layer M3, to minimize the overlap area between the data signal line 01 and the touch electrode block 15. Where overlap is unavoidable, the data signal line 01 can be formed using the third metal layer M3 to increase the distance between the data signal line 01 and the touch electrode block 15, thereby reducing the parasitic capacitance between them.

[0067] Thus, by setting the cathode block 13 and the spacing 00 to overlap with the data signal line 01 in a direction perpendicular to the plane of the display panel 100, the overlap area between the data signal line 01 and the touch electrode block 15 can be reduced, thereby improving touch performance.

[0068] Please continue to refer to this. Figure 4 and Figure 8 This disclosure provides a display panel 100, where a sub-pixel P includes an anode 31, and the display panel 100 includes a second voltage signal line 02 for transmitting a second voltage signal to the anode 31; along a direction perpendicular to the plane of the display panel 100, a cathode block 13 at least partially covers the second voltage signal line 02.

[0069] In the display panel 100, when the second voltage signal line 02 overlaps with the touch electrode in a direction perpendicular to the display panel 100, parasitic capacitance may be generated between the second voltage signal line 02 and the touch electrode. In this embodiment, by connecting multiple different island-shaped portions 14 to form a large cathode block 13, the cathode block 13 covers at least part of the second voltage signal line 02 in a direction perpendicular to the plane of the display panel 100. This reduces the overlap area between the second voltage signal line 02 and the touch electrode block 15. Based on reducing the total length of the interval 00 to reduce the parasitic capacitance between the cathode block 13 and the touch electrode block 15, the parasitic capacitance between the second voltage signal line 02 and the touch electrode block 15 is further reduced, thereby improving touch performance.

[0070] For example, please refer to Figure 4 Similar to data signal line 01, the second voltage signal line 02 can also be formed in the third metal layer M3, or the fourth metal layer M4, or both the third metal layer M3 and the fourth metal layer M4. Figure 4 The illustration only takes the formation of the second voltage signal line 02 in M3 as an example, and this disclosure does not limit it.

[0071] Thus, by configuring the cathode block 13 to cover at least part of the second voltage signal line 02, the overlap area between the second voltage signal line 02 and the touch electrode can be reduced, thereby reducing the parasitic capacitance between them and improving touch performance.

[0072] It should be noted that when the cathode block 13 covers at least part of the second voltage signal line 02 in a direction perpendicular to the plane of the display panel 100, it can also cover at least part of the data signal line 01 at the same time, further reducing the parasitic capacitance between the touch electrode block 15 and the data signal line 01, the second voltage signal line 02 and the cathode block 13, and improving the touch performance.

[0073] Figure 9 As shown Figure 8 Please refer to the cross-sectional diagram along the B-B' direction. Figure 9 This disclosure provides a display panel 100, which includes a connecting post 05. An anode 31 is connected to the connecting post 05, and the orthographic projection of the connecting post 05 on the display panel 100 overlaps with the anode 31. Along a direction perpendicular to the plane of the display panel 100, a cathode block 13 at least partially covers the anode 31 and the connecting post 05.

[0074] In the display panel 100, the driving layer 40 includes a transistor T, and the anode 31 is located on the side of the driving layer 40 opposite to the transistor T. The transistor T and the anode 31 are connected by a connecting post 05. That is, in the direction perpendicular to the plane of the display panel 100, the anode 31 is located above the transistor T. The orthographic projection of the connecting post 05 on the display panel 100 overlaps with the anode 31, which ensures that the signal transmitted by the transistor T can be transmitted vertically and reliably to the anode 31, avoiding long-distance lateral transmission and helping to reduce transmission loss.

[0075] As previously described, the cathode block 13 covers at least a portion of the second voltage signal line 02 in a direction perpendicular to the plane of the display panel 100, thereby reducing the overlap area between the second voltage signal line 02 and the touch electrode block 15 and lowering the capacitive load of the touch electrode block 15. Furthermore, the cathode block 13 covers at least a portion of the anode 31 and the connecting post 05 connected to the anode 31 in a direction perpendicular to the plane of the display panel 100. The connecting post 05 is a sensitive point between the transistor T and the anode 31, and a voltage signal also passes through the connecting post 05. The cathode block 13 covering at least a portion of the anode 31 reduces the parasitic capacitance between the anode and the touch electrode block 15, and the cathode covering at least a portion of the connecting post 05 reduces the overlap area between the connecting post 05 and the touch electrode block 15, thereby reducing the parasitic capacitance between the connecting post 05 and the touch electrode block 15. This embodiment of the present disclosure can further reduce the parasitic capacitance between the anode 31 and the connecting post 05 connected to the anode 31 and the touch electrode block 15, based on the reduction of the parasitic capacitance between the second voltage signal line 02 and the touch electrode block 15 in the aforementioned embodiments, thereby improving the touch performance of the display panel 100.

[0076] Thus, by arranging the cathode block 13 to cover at least part of the anode 31 and the connecting post 05 in a direction perpendicular to the plane of the display panel 100, the capacitive load on the touch electrode block 15 can be further reduced, and the touch performance can be improved.

[0077] It should be noted that in some other embodiments, when the cathode block 13 covers at least part of the second voltage signal line 02 in a direction perpendicular to the plane of the display panel 100, it can also cover at least part of the data signal line 01, the anode 31 and the connecting post 05 at the same time, further reducing the coupling between the touch electrode and the data signal line 01, the second voltage signal line 02, the anode 31, the connecting post 05 and the cathode block 13, thereby improving the touch performance.

[0078] Please refer to Figures 3 to 8 This disclosure provides a display panel 100, which includes a first voltage signal line 04 for transmitting a first voltage signal to the cathode of a sub-pixel P. In the same first sub-block 12, the cathodes of sub-pixels P corresponding to interconnected island portions 14 are connected to the same first voltage signal line 04.

[0079] In this embodiment, please refer to Figure 4 The cathodes of the sub-pixels P corresponding to the island-shaped portions 14 connected to each other within the same first sub-block 12 are connected to the same first voltage signal line 04, which can ensure that the cathodes of all sub-pixels P within the first sub-block 12 receive the same and stable voltage input, thereby reducing the display unevenness caused by power input differences within the first sub-block 12.

[0080] Furthermore, the cathode of a sub-pixel P in a first sub-block 12 corresponds to a first voltage signal line 04, which facilitates the modularity and repeatability of the wiring of the first voltage signal line 04 and simplifies the power network design and layout of large-scale arrays. If the display panel 100 adopts partitioned power supply, the design of one first voltage signal line 04 corresponding to one first sub-block 12 in this embodiment eliminates the need to draw a separate first voltage signal line 04 for each sub-pixel P within the first sub-block 12. Instead, only one first voltage signal line 04 needs to be drawn for each first sub-block 12, which improves wiring efficiency and saves wiring space. When the display panel 100 experiences a fault related to the first voltage signal line 04 or the first voltage power supply, since the power supply of the first voltage is divided according to the first sub-block 12, the faulty first voltage signal line 04 can be quickly located, which helps improve the fault diagnosis efficiency and repair feasibility of the display panel 100.

[0081] Thus, by connecting the cathodes of sub-pixels P in the first sub-block 12 to the same first voltage signal line 04, a modular power supply matching the structure can be achieved in the driving circuit, ensuring that the cathodes of sub-pixels P in each first sub-block 12 obtain the same stable power input, which can reduce resistance and improve the stability of cathode potential, as well as improve wiring efficiency and save wiring space.

[0082] Please refer to Figure 4 This disclosure provides a display panel 100 in which the cross-section of the gap 00 along the direction from the first functional layer 10 to the anode layer 30 is an inverted trapezoid. The gap 00 refers to the insulating gap between the cathode block 13 and the adjacent touch electrode block 15, which can be formed during the patterning process of the first functional layer 10. Optionally, the gap 00 can be a void, or it can be filled with insulating material; this disclosure does not limit this.

[0083] The cathode block 13 and the touch electrode block 15 can be manufactured using the same material in the same vapor deposition process. By employing special processing techniques to set the cross-section of the gap 00 into an inverted trapezoidal shape, compared to a shape with vertical sidewalls, the cathode material may accumulate along the vertical sidewalls, affecting the separation effect between the cathode block 13 and the touch electrode block 15. The inverted trapezoidal gap 00 in this embodiment facilitates a complete separation of the cathode block 13 and the touch electrode block 15, reducing the risk of residue and short circuits, thereby improving process yield.

[0084] Thus, by setting the cross section of the gap 00 between the cathode block 13 and the touch electrode block 15 into an inverted trapezoid, it is beneficial to completely separate the cathode block 13 and the touch electrode block 15, thereby improving the process yield.

[0085] Figure 10 The diagram shown is a connection schematic of a touch electrode provided in an embodiment of this disclosure. Please refer to it. Figure 10 This disclosure provides a display panel 100, wherein the touch electrode block 15 is a self-capacitive touch electrode block 18.

[0086] Self-capacitance touch technology is a touch detection technique based on the capacitance change between an electrode and ground (or the human body). When a human body or other conductor approaches a self-capacitance touch electrode, an additional coupling capacitance is introduced, causing the capacitance of the self-capacitance touch electrode to ground to increase. By detecting this capacitance change, the touch position can be determined. Self-capacitance touch electrodes typically employ a single-electrode structure, for example... Figure 10The self-capacitance touch electrode blocks 18 are arranged in a central array. Each self-capacitance touch electrode block 18 is electrically connected to a touch signal line 19, and the touch signal line 19 is electrically connected to the driver chip 00 via a fan-out area. Each self-capacitance touch electrode block 18 is a capacitor, and each touch signal line 19 charges the self-capacitance touch electrode block 18 it is electrically connected to. When there is a touch, the capacitance of this self-capacitance touch electrode block 18 increases, and the time required to fully charge it increases. The driver chip 00 determines whether there is a touch based on the charging time and determines the specific position coordinates based on the changes in the surrounding capacitance, thus realizing the touch function of the display panel 100.

[0087] Figure 11 The figure shown is a plan view of a display device provided in an embodiment of this disclosure. Please refer to it. Figure 11 This disclosure provides a display device 200, including the display panel 100 as described above. The display device 200 provided in this disclosure can be any electronic device with display functionality, such as a touch screen, mobile phone, tablet computer, laptop computer, e-reader, or television. The display device 200 provided in this disclosure has the beneficial effects of the display panel provided in this disclosure. For details, please refer to the specific descriptions of the display panel in the above embodiments; these will not be repeated here.

[0088] Understandable, Figure 11 The shape of the display device 200 is illustrated using only a right-angled rectangle structure as an example. In some other embodiments of this disclosure, the display device 200 may also be circular, elliptical or any other feasible shape, and this disclosure does not specifically limit it in this regard.

[0089] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that, include: The anode layer, the light-emitting layer, and the first functional layer are located on the side of the light-emitting layer opposite to the anode layer. The first functional layer includes functional units arranged in an array. Each functional unit includes a touch electrode block and a cathode block. There is a gap between the touch electrode block and the cathode block, and the touch electrode block and the cathode block are insulated from each other. The display panel further includes sub-pixels arranged in an array, and the cathode block includes a first connecting portion and an island-shaped portion corresponding to the sub-pixel. The first connecting portion is used to connect at least two adjacent island-shaped portions.

2. The display panel as described in claim 1, characterized in that, The first connecting portion connects two island-shaped portions of different sizes, and the island-shaped portions of different sizes correspond to the cathodes of the sub-pixels of different colors.

3. The display panel as described in claim 2, characterized in that, The cathode block includes a first island cathode and / or a second island cathode, the first island cathode including a first sub-connection portion, the first sub-connection portion overlapping the center line connecting the two different island portions; The second island cathode includes a second sub-connection portion located on the same side of the line connecting the centers of the two different island portions.

4. The display panel as described in claim 3, characterized in that, The functional unit includes a plurality of first sub-blocks, and any first sub-block includes at least one first island cathode and / or at least one second island cathode.

5. The display panel as described in claim 4, characterized in that, The second island cathodes in one of the first sub-blocks are not connected to each other.

6. The display panel as described in claim 4, characterized in that, In the first sub-block, the second island cathode is arranged along the row direction and / or column direction.

7. The display panel as described in claim 4, characterized in that, In the first sub-block, at least one of the first island cathode and the second island cathode is located on the diagonal of the first sub-block.

8. The display panel as described in claim 4, characterized in that, In the first sub-block, at least one of the first island cathodes is connected to an adjacent first island cathode.

9. The display panel as described in claim 3, characterized in that, The cathode block further includes a third island cathode, which includes a second connecting portion that connects at least three adjacent island portions.

10. The display panel as claimed in claim 9, characterized in that, All the island-shaped portions in a first sub-block are connected to each other via the first connecting portion and / or the second connecting portion.

11. The display panel as claimed in claim 8, characterized in that, The display panel also includes a data signal line, which is used to transmit data signals to the sub-pixel; Along a direction perpendicular to the plane of the display panel, the cathode block at least covers a portion of the data signal lines, or the spacing overlaps with at least a portion of the data signal lines.

12. The display panel as claimed in claim 8, characterized in that, The sub-pixel includes an anode, and the display panel includes a second voltage signal line, which is used to transmit a second voltage signal to the anode. Along a direction perpendicular to the plane of the display panel, the cathode block at least partially covers the second voltage signal line.

13. The display panel as claimed in claim 12, characterized in that, The display panel further includes a connecting post, the anode is connected to the connecting post, and the orthographic projection of the connecting post on the display panel overlaps with the anode; Along a direction perpendicular to the plane of the display panel, the cathode block at least partially covers the anode and the connecting post.

14. The display panel as claimed in claim 10, characterized in that, The display panel includes a first voltage signal line, which is used to transmit a first voltage signal to the cathode of the sub-pixel. In the same first sub-block, the cathodes of the sub-pixels corresponding to the interconnected island portions are connected to the same first voltage signal line.

15. The display panel as claimed in claim 1, characterized in that, Along the direction from the first functional layer to the anode layer, the cross-section of the interval is an inverted trapezoid.

16. The display panel as claimed in claim 1, characterized in that, The touch electrode block is a self-capacitance touch electrode block.

17. A display device, characterized in that, Includes the display panel as described in any one of claims 1-16.

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