Display panel and display device

Abstract

The invention provides a display panel and a display device, and the display panel comprises a substrate; the touch layer is arranged on one side of the substrate, and a plurality of touch signal lines are arranged on the touch layer; wherein the touch signal line located at the outermost edge in the plurality of touch signal lines is a first touch signal line; the anode layer is arranged between the substrate and the touch layer and is provided with a first through hole; the source and drain electrode layer is arranged between the substrate and the anode layer and is provided with a second through hole; wherein the orthographic projection of the first touch signal line on the substrate is at least partially overlapped with the orthographic projection of the first through hole or the second through hole on the substrate, and the orthographic projection of the first through hole on the substrate is not overlapped with the orthographic projection of the second through hole on the substrate.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] With the development of intelligent mobile terminals, touch screen mobile terminals are favored by more and more users. A common configuration is to set a touch screen panel (TSP) on the display surface or light emitting surface of the display panel to achieve touch control.

[0003] However, during the quality inspection and use of TSP touch display panels, inaccurate touch signals may occur at the edges, resulting in defective products.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to those skilled in the art. Summary of the invention

[0005] In view of this, the present application proposes a display panel and a display device to solve or partially solve the above problems.

[0006] Based on the above objectives, in a first aspect, the present application provides a display panel, including:

[0007] substrate substrate;

[0008] A touch layer is arranged on one side of the base substrate, and a plurality of touch signal lines are arranged thereon; wherein the touch signal line located at the outermost edge of the plurality of touch signal lines is a first touch signal line;

[0009] an anode layer, disposed between the base substrate and the touch layer, and provided with a first through hole;

[0010] A source-drain electrode layer is disposed between the base substrate and the anode layer and is provided with a second through hole;

[0011] The orthographic projection of the first touch signal line on the base substrate at least partially overlaps with the orthographic projection of the first through hole or the second through hole on the base substrate, and the orthographic projections of the first through hole and the second through hole on the base substrate do not overlap.

[0012] In some exemplary embodiments, a spacing between orthographic projections of the first through hole and the second through hole on the substrate is greater than or equal to 1 μm.

[0013] In some exemplary embodiments, a plurality of the first through holes are provided and are evenly arranged along an extending direction of the first touch signal line.

[0014] In some exemplary embodiments, a plurality of the second through holes are provided and are evenly arranged along the extending direction of the first touch signal line.

[0015] In some exemplary embodiments, the first through hole and the second through hole are configured to discharge gas between layers of the display panel.

[0016] In some exemplary embodiments, the display panel further includes:

[0017] The cathode layer is disposed between the touch control layer and the anode layer.

[0018] In some exemplary embodiments, the display panel further includes:

[0019] The packaging layer is disposed between the touch layer and the anode layer.

[0020] In some exemplary embodiments, the encapsulation layer comprises:

[0021] At least two inorganic encapsulation layers are stacked between the touch layer and the anode layer;

[0022] At least one organic encapsulation layer is disposed between the at least two inorganic encapsulation layers and is spaced apart from the at least two inorganic encapsulation layers.

[0023] In some exemplary embodiments, the display panel further includes:

[0024] The buffer layer is disposed between the touch layer and the anode layer.

[0025] Based on the same concept, in a second aspect, the present application also provides a display device, comprising the display panel as described in the first aspect above.

[0026] As can be seen from the above, the present application provides a display panel and a display device, the display panel comprising: a base substrate; a touch layer, arranged on one side of the base substrate, and having a plurality of touch signal lines arranged thereon; wherein the first touch signal line is located at the edgemost among the plurality of touch signal lines; an anode layer, arranged between the base substrate and the touch layer, and having a first through hole; a source-drain electrode layer, arranged between the base substrate and the anode layer, and having a second through hole; wherein the orthographic projection of the first touch signal line on the base substrate at least partially overlaps with the orthographic projection of the first through hole or the second through hole on the base substrate, and the orthographic projections of the first through hole and the second through hole on the base substrate do not overlap. After determining that the cause of the inaccurate touch signal problem is that the touch signal line located at the edge is crosstalked by other circuits, the application adjusts the first through hole located at the anode layer and the second through hole located at the source and drain electrode layer at the position of the touch signal line at the edge, and staggers the two through holes that were originally directly connected up and down, so that the orthographic projections of the two through holes on the substrate do not overlap at all, so that the touch signal line located at the edge will not be affected by the crosstalk between the first through hole and the second through hole that are directly connected and the bottom substrate circuit. The problem of inaccurate touch signals caused by signal crosstalk is solved, and the product yield and user experience are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic diagram of a partial hierarchical structure of an exemplary display panel provided in an embodiment of the present application.

[0029] Figure 2 A schematic diagram for comparing local hierarchical structures with and without cathode layer isolation in a specific application provided in an embodiment of the present application.

[0030] Figure 3 A schematic diagram of a partial hierarchical structure of another exemplary display panel provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of this specification more clear, this specification is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0032] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements, objects or method steps appearing before the word cover the elements, objects or method steps listed after the word and their equivalents, without excluding other elements, objects or method steps. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] As described in the background technology section, for a display panel with a touch substrate (TSP), in the touch layer where the touch substrate is located, at least a drive signal (Tx signal) line for generating a touch signal and a sensing signal (Rx signal) line for receiving a touch signal can be included. The drive signal line and the sensing signal line can be arranged in a hierarchical form. In each layer, the corresponding signal lines can be arranged along a certain rule, and the drive signal line is generally located in the upper layer, and the sensing signal line is generally located in the lower layer, which is convenient for signal generation and reception. Other functional layers can also be set in the display panel under the touch substrate, such as a cathode layer (Cathode), an anode layer (Anode), a source-drain electrode layer (SD), etc. Later, in a specific scenario, when the applicant encounters the problem of inaccurate touch signals at the edge during quality inspection and use, the cause of the problem is investigated and it is found that the problem may be caused by the crosstalk between the sensing signal (Rx signal) line located in the lower layer of the touch layer and the bottom plate circuit (BP circuit) arranged on the substrate at the edge position. Further analysis revealed that this may be due to the deviation between the actual boundary and the design boundary of the cathode layer (Cathode, or CTD), resulting in the lack of isolation between the sensing signal line and the bottom board circuit. Specifically, for the display panel, after it is completed and put into use, it will inevitably encounter erosion problems from air, especially water vapor, and these water vapors will gradually erode the edges of some metal layers, including the cathode layer (Cathode, or CTD). At the same time, in order to clear the air or water vapor between the layers of the display panel during use and prevent the air or water vapor from being retained for a long time or forming stress concentration, through holes may be set on each layer of the display panel for gas discharge. Considering some other factors, through holes of some layers will also be designed at the edge of the display panel, such as the anode layer and the source and drain electrode layer. In this way, if Figure 1 and Figure 2 As shown, when the cathode layer 150 is corroded to cause a deviation between the actual boundary and the designed boundary, the sensing signal line located at the edge (the first touch signal line 121 in the figure) and the bottom board circuit on the base substrate 110 are free from the obstruction of other electrode layers to a certain extent through the first through hole 131 of the anode layer 130 and the second through hole 141 of the source-drain electrode layer 140, which eventually leads to crosstalk between the first touch signal line 121 and the bottom board circuit on the base substrate 110, resulting in noise (Noise) in the touch signal here, forming TSP Noise NG, which causes the problem of inaccurate touch signal at the edge on a macro scale, resulting in defective products.

[0034] Thus, in combination with the above-mentioned actual situation, an embodiment of the present application provides a display panel. After determining that the cause of the inaccurate touch signal problem is that the touch signal line located at the edge is crosstalked by other circuits, the present application adjusts the first through hole located at the anode layer and the second through hole located at the source-drain electrode layer at the position of the touch signal line at the edge, and staggers the two through holes that were originally directly connected up and down, so that the orthographic projections of the two through holes on the substrate do not overlap at all, so that the touch signal line located at the edge will not be affected by the crosstalk between the first through hole and the second through hole that are directly connected and the bottom substrate circuit. The problem of inaccurate touch signals caused by signal crosstalk is solved, and the product yield and user experience are improved.

[0035] Figure 3 A schematic diagram of a partial hierarchical structure of an exemplary display panel provided in an embodiment of the present application is shown.

[0036] Combination Figure 3 As shown, a display panel 100 of an embodiment of the present application includes: a base substrate 110; a touch layer 120, which is arranged on one side of the base substrate 110 and has a plurality of touch signal lines arranged thereon; wherein the first touch signal line 121 is located at the edge of the plurality of touch signal lines; an anode layer 130, which is arranged between the base substrate 110 and the touch layer 120 and has a first through hole 131; a source-drain electrode layer 140, which is arranged between the base substrate 110 and the anode layer 130 and has a second through hole 141; wherein the orthographic projection of the first touch signal line 121 on the base substrate 110 at least partially overlaps with the orthographic projection of the first through hole 131 or the second through hole 141 on the base substrate 110, and the orthographic projections of the first through hole 131 and the second through hole 141 on the base substrate 110 do not overlap.

[0037] In this embodiment, the base substrate 110 can be used to carry other components in the display panel 100. The touch layer 120 can include touch-related components and structures, wherein the multiple touch signal lines can be the aforementioned drive signal (Tx signal) line and the sensing signal (Rx signal) line. At the same time, since the sensing signal (Rx signal) line is generally located below, in this embodiment, the multiple touch signal lines take the sensing signal (Rx signal) line as an example. And the multiple touch signal lines can be arranged according to corresponding rules, such as uniformly arranged in rows or columns, etc., so that the touch signal line located at the edge is called the first touch signal line 121, which can be the sensing signal line at the edge. The anode layer 130 can be used to provide holes for absorbing electrons, and a first through hole 131 is set at the edge of the display panel 100. The source-drain electrode layer 140 can transmit signals for controlling the source and drain of a thin film transistor (TFT). A second through hole 141 is disposed at the edge of the display panel 100 .

[0038] In some specific scenarios, such as Figure 3 As shown, the first through hole 131 and the second through hole 141 may be connected, and the first through hole 131 and the second through hole 141 may be located just below the first touch signal line 121, that is, the orthographic projections of the first through hole 131 and the second through hole 141 on the base substrate 110 may overlap with the orthographic projections of the first touch signal line 121 on the base substrate 110. At this time, there is no obstruction of other electrode layers between the first touch signal line 121 and the backplane circuit (BP circuit) located on the base substrate 110, resulting in circuit crosstalk between the two. Therefore, in a scenario where the orthographic projection of the first touch signal line 121 on the base substrate 110 at least partially overlaps with the orthographic projection of the first through hole 131 or the second through hole 141 on the base substrate 110, the first through hole 131 and the second through hole 141 are staggered so that the through holes are not connected, thereby ensuring that there is at least one electrode layer between the first touch signal line 121 and the backplane circuit located on the base substrate 110 for isolation, thereby structurally eliminating the possibility of crosstalk between the first touch signal line 121 and the backplane circuit located on the base substrate 110, thereby solving the problem of inaccurate touch signals caused by signal crosstalk and improving product yield and user experience. If the orthographic projection of the first through hole 131 or the second through hole 141 on the base substrate 110 does not overlap with the orthographic projection of the first touch signal line 121 on the base substrate 110, the first touch signal line 121 itself will not cause crosstalk with the backplane circuit on the base substrate 110 due to the above reasons, and the problem of inaccurate touch signals will not be caused. Figure 3As shown in FIG. 1 , in one embodiment, the first through hole 131 corresponds to the first touch signal line 121 in position, and the position of the second through hole 141 can be adjusted. On the plane of the source-drain electrode layer 140 where the second through hole 141 is located, the position adjustment can be performed in any direction, for example, as shown in FIG. Figure 3 As shown, the second through hole 141 is adjusted to below the adjacent touch signal line; or because the first through holes 131 may be of a certain size and arranged at intervals, the second through hole 141 may be adjusted to the interval between the first through holes 131, and so on.

[0039] It should be noted that in a more specific application scenario, the anode layer 130 and the source-drain electrode layer 140 can both be VSS signals, so that on the basis of ensuring the original efficacy, the shielding effect formed is similar.

[0040] In some embodiments, in order to further improve the effect and prevent the first through hole 131 and the second through hole 141 from being accidentally connected due to some other reasons, the spacing between the first through hole 131 and the second through hole 141 can be controlled, for example, the spacing between the orthographic projections of the two on the base substrate 110 can be greater than or equal to 1μm or 2μm. In this way, the base substrate and the circuit thereon can be processed by an exposure process, and the process OL precision is 0.8μm, so that even if the cathode is evaporated (CTD shadow) with large fluctuations, the crosstalk problem between the first touch signal line 121 and the backplane circuit (BP circuit) can be avoided. That is, in some embodiments, the spacing between the orthographic projections of the first through hole 131 and the second through hole 141 on the base substrate is greater than or equal to 1μm.

[0041] In some embodiments, in order to enhance the effect of the first through hole 131 or the second through hole 141 itself, it can be arranged along the extension direction of the first touch signal line 121. In this way, in a specific application scenario, the first through hole 131 and the second through hole 141 can be evenly spaced, for example, the first through hole 131 and the second through hole 141 are spaced at intervals of 1 μm along the extension direction of the first touch signal line 121. That is, in some embodiments, the first through hole 131 is provided in plurality and is evenly spaced along the extension direction of the first touch signal line 121. In some embodiments, the second through hole 141 is provided in plurality and is evenly spaced along the extension direction of the first touch signal line 121.

[0042] Furthermore, the function of the first through hole 131 or the second through hole 141 can be specifically set according to the specific application scenario. In some embodiments, it can be used to discharge the gas between the layers of the display panel 100. That is, in some embodiments, the first through hole 131 and the second through hole 141 are configured to discharge the gas between the layers of the display panel 100.

[0043] In some embodiments, Figure 3 As shown, for the display panel 100, a cathode layer 150 for functions such as electron injection may also be provided, which may be provided between the touch layer 120 and the anode layer 130. In some embodiments, since the cathode layer 150 is provided, the requirements for the arrangement of the first through hole 131 and the second through hole 141 are not too high. However, since the cathode layer 150 itself may be corroded, the aforementioned problems may still be caused. Therefore, in order to ensure the product yield, it is still necessary to limit the arrangement positions of the first through hole 131 and the second through hole 141.

[0044] In some embodiments, Figure 3 As shown, for the display panel 100, in order to further enhance the protection of metal structural layers such as circuits and block the invasion of water and oxygen, a packaging layer 160 can be set between the touch layer 120 and the anode layer 130 to avoid contact between the device and water and oxygen and reduce the aging rate of the device. In more specific application scenarios, an inorganic packaging layer 161 and / or an organic packaging layer 162 can be set more specifically. Among them, the inorganic packaging layer 161 can be a chemical vapor deposition thin film layer (Chemical Vapor Deposition Layer, referred to as CVD layer) prepared by chemical vapor deposition; the organic packaging layer 162 can be an inkjet printing layer (Inkjet Printing Layer, referred to as IJP layer) that can flatten the film layer. At the same time, in some embodiments, the inorganic packaging layer 161 and the organic packaging layer 162 can also be used in combination, for example, the two can be used in combination in the form of an interval setting. As Figure 3 As shown, it is an example of using two layers of inorganic encapsulation layer 161 and one layer of organic encapsulation layer 162 in combination, wherein two layers of inorganic encapsulation layer 161 are added with one layer of organic encapsulation layer 162 to form a multi-level protection. That is, in some embodiments, the encapsulation layer 160 includes: at least two layers of inorganic encapsulation layer 161, which are stacked and arranged between the touch layer 120 and the anode layer 130; at least one layer of organic encapsulation layer 162, which is arranged between the at least two layers of inorganic encapsulation layer 161 and is spaced apart from the at least two layers of inorganic encapsulation layer 161.

[0045] In some embodiments, Figure 3As shown, in order to buffer the pressing pressure and reduce the compression of other structures under the touch layer caused by pressing, a buffer layer 170 can be further provided between the touch layer 120 and the anode layer 130. The buffer layer 170 can specifically be a TBR film layer (Touch Barrier film layer).

[0046] As can be seen from the above description, the present application provides a display panel, which includes: a base substrate; a touch layer, which is arranged on one side of the base substrate and has a plurality of touch signal lines arranged thereon; wherein the first touch signal line is located at the edgemost of the plurality of touch signal lines; an anode layer, which is arranged between the base substrate and the touch layer and has a first through hole; a source-drain electrode layer, which is arranged between the base substrate and the anode layer and has a second through hole; wherein the orthographic projection of the first touch signal line on the base substrate at least partially overlaps with the orthographic projection of the first through hole or the second through hole on the base substrate, and the orthographic projections of the first through hole and the second through hole on the base substrate do not overlap. After determining that the cause of the inaccurate touch signal problem is that the touch signal line located at the edge is crosstalked by other circuits, the application adjusts the first through hole located at the anode layer and the second through hole located at the source and drain electrode layer at the position of the touch signal line at the edge, and staggers the two through holes that were originally directly connected up and down, so that the orthographic projections of the two through holes on the substrate do not overlap at all, so that the touch signal line located at the edge will not be affected by the crosstalk between the first through hole and the second through hole that are directly connected and the bottom substrate circuit. The problem of inaccurate touch signals caused by signal crosstalk is solved, and the product yield and user experience are improved.

[0047] Based on the same concept, the present application also provides a display device, comprising a display panel as described in any of the aforementioned embodiments.

[0048] The display device of the above embodiment is used to apply the corresponding display panel in the above embodiment, and has the beneficial effects of the embodiment of the corresponding display panel, which will not be described in detail here.

[0049] It can be understood that the display device is a product with an image display function, and it is generally driven by multiple driving circuits. For example, it can be: a display, a television, a billboard, a digital photo frame, a laser printer with a display function, a telephone, a mobile phone, a personal digital assistant (PDA), a digital camera, a portable camcorder, a viewfinder, a navigator, a vehicle, a large-area wall, a home appliance, an information query device (such as business query equipment and monitors of e-government, banks, hospitals, power and other departments).

[0050] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0051] In addition, to simplify the description and discussion, and in order not to make the embodiments of the present application difficult to understand, the known power supply / ground connection with the integrated circuit (IC) chip and other components may or may not be shown in the provided drawings. In addition, the device can be shown in the form of a block diagram to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform to be implemented in the embodiments of the present application (that is, these details should be fully within the scope of understanding of those skilled in the art). In the case of elaborating specific details (e.g., circuits) to describe exemplary embodiments of the present application, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered to be illustrative rather than restrictive.

[0052] Although the present application has been described in conjunction with specific embodiments of the present application, many replacements, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.

[0053] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A display panel, characterized in that: include: substrate substrate; A touch layer is arranged on one side of the base substrate, and a plurality of touch signal lines are arranged thereon; wherein the touch signal line located at the outermost edge of the plurality of touch signal lines is a first touch signal line; an anode layer, disposed between the base substrate and the touch layer, and provided with a first through hole; A source-drain electrode layer is disposed between the base substrate and the anode layer and is provided with a second through hole; The orthographic projection of the first touch signal line on the base substrate at least partially overlaps with the orthographic projection of the first through hole or the second through hole on the base substrate, and the orthographic projections of the first through hole and the second through hole on the base substrate do not overlap.

2. The display panel according to claim 1, characterized in that: A distance between orthographic projections of the first through hole and the second through hole on the base substrate is greater than or equal to 1 μm.

3. The display panel according to claim 1, characterized in that: A plurality of the first through holes are provided and are evenly arranged along the extending direction of the first touch signal line.

4. The display panel according to claim 1, characterized in that: A plurality of second through holes are provided and are evenly arranged along the extending direction of the first touch signal line.

5. The display panel according to claim 1, characterized in that: The first through hole and the second through hole are configured to discharge gas between the layers of the display panel.

6. The display panel according to claim 1, characterized in that: Also includes: The cathode layer is disposed between the touch control layer and the anode layer.

7. The display panel according to claim 1, characterized in that: Also includes: The packaging layer is disposed between the touch layer and the anode layer.

8. The display panel according to claim 7, characterized in that: The encapsulation layer comprises: At least two inorganic encapsulation layers are stacked between the touch layer and the anode layer; At least one organic encapsulation layer is disposed between the at least two inorganic encapsulation layers and is spaced apart from the at least two inorganic encapsulation layers.

9. The display panel according to claim 1, characterized in that: Also includes: The buffer layer is disposed between the touch layer and the anode layer.

10. A display device, characterized in that: include: A display panel as claimed in any one of claims 1 to 9.

Images