CN114203039A - Display panel and display device - Google Patents
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
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Abstract
The present application relates to a display panel and a display device, wherein the display panel includes: a substrate; an electronic device disposed on one side of the substrate; the grounding wire is arranged on the outer side of the electronic device along the circumferential direction; an insulating layer comprising a first insulating structure disposed between the ground line and the electronic device, a minimum distance S1 of the ground line from the electronic device being set to: V/C1 is not less than S1 is not less than 1.5V/C1, wherein V is a test voltage, and C1 is the breakdown field strength of the first insulating structure. The display panel and the display device provided by the embodiment of the application can optimize the wiring design and the electrostatic protection function of the panel and improve the reliability.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
With the development of display technology, various aspects of display panels are continuously optimized, wherein the performance of protection against static electricity is one of the important points. When the display panel contacts with the outside or carries out power hot plug, instantaneous high-voltage current is likely to appear, and when this kind of current stridees across the peripheral protection of display panel and walks the line, jump to the inside different conducting layer overlap joint of panel, the circuit will cause this department circuit to discharge when the weak region of protection such as thinner department of circuit, and then lead to the display panel to damage. Based on this, the wiring design for the antistatic function is one of important design bottlenecks.
Therefore, a new display panel and a display device capable of improving the protection against the instantaneous large current are needed.
Disclosure of Invention
The application provides a display panel and a display device.
In one aspect, a display panel is provided according to an embodiment of the present application, including: a substrate; an electronic device disposed on one side of the substrate; the grounding wire is arranged on the outer side of the electronic device along the circumferential direction; an insulating layer comprising a first insulating structure disposed between a ground line and an electronic device, the ground line being disposed a minimum distance S1 from the electronic device to: V/C1 is not less than S1 is not less than 1.5V/C1, wherein V is test voltage, and C1 is breakdown field strength of the first insulating structure.
According to one aspect of an embodiment of the present application, a display panel has a display area and a non-display area disposed at an outer periphery of the display area; the electronic device comprises a device main body arranged in the display area and a connecting wire connected to the device main body and extending along the non-display area; the ground line extends along the non-display area, and the minimum distance between the ground line and the connecting trace is the minimum distance S1 between the ground line and the electronic device.
According to an aspect of the embodiments of the present application, the ground line includes a first ground line and a second ground line, the first ground line is disposed between the second ground line and the connection trace, and the insulating layer further includes a second insulating structure disposed between the second ground line and the first ground line.
According to an aspect of an embodiment of the present application, the minimum distance S2 between the first ground line and the second ground line is set as: V/C2 is not less than S2 is not less than 1.5V/C2, wherein V is test voltage, and C2 is breakdown field strength of the second insulation structure.
According to an aspect of the embodiment of the present application, the first ground line, the second ground line, and the connection trace are arranged in parallel, and the minimum distance S1 is equal to the minimum distance S2.
According to one aspect of the embodiment of the present application, the connection trace, the first ground line, and the second ground line are disposed in the same layer; the width of the second grounding wire is 1-3 times of the width of the connecting wire.
According to an aspect of an embodiment of the present application, the first ground line is provided as at least two lines parallel to each other.
According to an aspect of the embodiments of the present application, the ground line is disposed on the same layer as the electronic device, and the device body includes a touch electrode disposed in the display area.
According to an aspect of an embodiment of the present application, the ground wire is provided with a break opening.
In another aspect, a display device is provided according to an embodiment of the present application, which includes the display panel described above.
According to the display panel provided by the embodiment of the application, the display panel comprises an electronic device, a grounding wire arranged around the electronic device and an insulating structure arranged between the electronic device and the grounding wire, wherein the electronic device and the grounding wire have a specific distance range. According to the method, the optimal distance range between the grounding wire and the electronic device is calculated and determined according to the structural composition of the testing voltage and the insulating layer, the wiring scheme of the display panel can be designed quickly and simply, the wiring space can be fully utilized, the reliable anti-static effect is achieved, and the method is suitable for design and production of narrow-frame display panel products.
Drawings
Features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of a display panel according to an embodiment of the present application;
FIG. 2 is a cross-sectional view taken at A-A' of FIG. 1;
FIG. 3 is an enlarged view of region P of FIG. 1;
FIG. 4 is a schematic structural diagram of a display panel according to another embodiment of the present application;
fig. 5 is an enlarged view of region Q in fig. 4.
Wherein:
10-a display panel;
11-a substrate; 12-an electronic device; 13-a ground line; 14-an insulating layer; 15-a flexible circuit board;
101-a display area; 102-a non-display area;
121-a device body; 122-connection routing;
121 a-a first electrode; 121 b-a second electrode;
131-a first ground line; 132-a second ground line; 133-breaking the opening;
141-a first insulating structure; 142-a second insulating structure.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.
Features and exemplary embodiments of various aspects of the present application will be described in detail below. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The display panel can generate electrostatic discharge in the manufacturing and using processes, and meanwhile, high-voltage static electricity can be generated inside the display panel under the conditions of surge caused by unstable power supply, transient surge current caused by hot plug, transient induction current generated by lightning stroke and the like, so that the problem of electrostatic damage can be caused at the tip of the touch screen, a thin line and the layer lap joint of different conducting layers
Further, the conventional touch display device is usually provided with a plurality of touch electrodes for converting touch signals into electrical signals, so that a certain sensitivity needs to be ensured. Based on this, in the following description of the present application, the electronic device 12 is taken as an example of a touch module, that is, the device main body is the touch electrode 121, and the connection trace is the touch trace 122, but the present application is not limited thereto, and the electronic device 12 in the present application may also be one or more electronic devices required by a display panel such as an underscreen fingerprint identification module, an underscreen camera module, and the like.
Referring to fig. 1 and fig. 2 together, fig. 1 is a schematic structural diagram of a display panel 10 according to an embodiment of the present application, and fig. 2 is a cross-sectional view taken along line a-a' in fig. 1. Among them, the display panel 10 includes: a substrate 11; an electronic device 12 provided on one side of the substrate 11; a ground line 13 provided on the outer side of the electronic component 12 in the circumferential direction; an insulating layer 14 including a first insulating structure 141 disposed between the ground line 13 and the electronic device 12, the minimum distance S1 between the ground line 13 and the electronic device 12 being set as: V/C1 is not less than S1 is not less than 1.5V/C1, wherein V is the test voltage of the display panel, and C1 is the breakdown field strength of the first insulating structure.
In some alternative embodiments, the display panel 10 has a display area 101 and a non-display area 102 disposed at the periphery of the display area 101; the electronic device 12 includes a device body 121 disposed in the display region, and a connection trace 122 connected to the device body 121 and extending along the non-display region 102; the grounding line 13 extends along the non-display area 102, and a minimum distance between the grounding line 13 and the connecting trace 122 is the minimum distance S1.
The display panel 10 provided by the present application includes an electronic device 12 disposed on one side of a substrate 11, and in some optional embodiments, the electronic device is a touch module for receiving a touch signal and converting the touch signal into a corresponding electrical signal, so that the touch module can be used as a human-computer interaction terminal to combine with the display panel module to form a touch display device. That is, the electronic device 12 includes the touch electrode 121, in some alternative embodiments, the touch electrode 121 is a mutual capacitance structure, which includes a first electrode 121a extending in the transverse direction and a second electrode 121b extending in the longitudinal direction, where the first electrode 121a and the second electrode 121b are insulated from each other and cross to form a capacitance, and when there is a touch input, the coupling between the electrodes near the touch point is affected to change the capacitance value, so that the coordinates of the touch point can be accurately obtained. The electronic device 12 further includes a plurality of touch traces 122, the plurality of touch traces 122 are electrically connected to the first electrodes 121a in each row or the second electrodes 121b in each column one by one, optionally, the touch traces 122 electrically connected to the first electrodes 121a input the excitation signal, and the touch traces 122 electrically connected to the second electrodes 121b receive the signal to form the touch point coordinates. Obviously, in the electronic device 12, the touch trace 122 electrically connected to the second electrode 121b can also input an excitation signal, and the touch trace 122 electrically connected to the first electrode 121a can receive a signal, which is not particularly limited in this application.
When static electricity jumps among circuits, the insulating layer 14 at the position where the distance between circuit traces is the nearest or the shape of a tip is the thinnest and is most likely to be broken down and cause static electricity to jump therein, and if the minimum distance between the first ground line 131 and the electronic device 12 in the display panel 10 is set to the minimum distance S1, the problem that the insulating layer 14 is broken down and static electricity jumps into the display panel is most likely to occur at this position. That is, when the minimum distance S1 is too small, static electricity may jump inward, and when the distance is too large, the frame of the display panel 10 may be too wide, which may hinder the increase of the screen occupation ratio, thereby affecting the display effect. Thus, controlling the size of this distance is an important bottleneck in the design of the display panel 10. The minimum distance S1 is the smaller of the distance between the ground line 13 and the device main body 121 and the distance between the ground line 13 and the connection trace 122, and it can be understood that the distance between the traces is generally smaller than the distance between the traces and the conductive area of the other electronic device, that is, the minimum distance S1 is generally the distance between the ground line 13 and the connection trace 122, limited by the non-display area wiring space, the screen occupation requirement, and the like.
On the basis, in one embodiment of the application, a wiring design scheme of the ground line and the touch-control routing is provided, and the optimal design of the minimum distance between the routing lines can be obtained through simple calculation.
Before the display panel is put into use, an electrostatic protection test is generally required, in some optional embodiments, the test voltage V of the display panel 10 may be obtained by a method of performing software simulation calculation on the display panel 10, a range of electrostatic discharge voltage that may occur in the use process of the display panel 10 may be obtained through simulation, and a value of the test voltage V needs to be greater than a maximum value of the range. According to the electrical characteristics of the display panel 10, a system-level electrostatic test is usually performed by using a contact discharge of ± 8kV and an air discharge of ± 15kV, and the specific test voltage is not particularly limited in the present application and can be selected according to the processing and using conditions.
Meanwhile, the breakdown field strength C1 of the first insulating structure 141 at the minimum distance S1 can also be obtained by the test. The breakdown field strength, which is the highest electric field strength that a material can withstand without breaking down under the action of an electric field, is generally expressed by the ratio of the breakdown voltage of a sample to its thickness. The breakdown voltage of the insulating layer 14 is related to the preparation conditions, material, test environment temperature, thickness, etc. of the insulating layer 14, therefore, before the wiring design, the insulating performance of the insulating layer 14 needs to be tested to obtain the required breakdown electric field strength C1.
Further, the optimum design of the minimum distance S1 is the ratio of the test voltage V to the corresponding breakdown field strength. On one hand, the minimum distance S1 needs to be equal to or greater than the optimal design value, and the wiring design can minimize the distance between the wirings while ensuring that the insulating structure between the circuit wirings is not broken down, i.e., static electricity cannot jump back and forth between the wirings. On the other hand, the minimum distance S1 needs to be equal to or less than 1.5 times of the optimal design value at the same time, so as to avoid affecting the space of other wiring layout designs or affecting the miniaturization of the display panel, thereby achieving both the electrostatic protection and the narrow-frame display of the display panel, and improving the reliability and the screen occupation ratio of the display panel.
It is understood that the first insulating structure 141 can be a single integral layer structure composed of the same insulating material, or the first insulating structure 141 can be a combination of a plurality of sub-insulating structures with different insulating parameters, i.e., the connection line between the first ground line 131 and the touch trace 122 at the minimum distance S1 can pass through the interfaces of a plurality of different insulating materials. In this case that the first insulating structure 141 includes a plurality of sub-structures, it is also necessary to perform a breakdown field strength test on the first insulating structure 141 before designing the wiring, where the breakdown field strength of each layer may be calculated for respective tests according to the thicknesses of different sub-insulating structures, and then the breakdown field strengths are collectively calculated to obtain the breakdown field strength C1 of the first insulating structure 141.
In some optional embodiments, the ground line 13 includes a first ground line 131 and a second ground line 132, the first ground line 131 is disposed between the second ground line 132 and the connection trace 122, and a second insulating structure 142 is disposed between the first ground line 131 and the second ground line 132.
For the aspect of Electro-Static discharge (ESD) prevention and Electrical Overstress (EOS) prevention of the substrate, a plurality of ground wires are arranged around the display area 101 at the periphery of the display panel 10, and a multi-layer protection is formed by the ground wires to intercept and release Static electricity layer by layer, so that Static electricity is prevented from jumping to other internal circuits to cause touch failure. In some optional embodiments, the voltages of the first ground line 131 and the second ground line 132 are both 0V, wherein the first ground line 131 is disposed adjacent to the touch trace 122, the second ground line 132 is disposed at the periphery of the first ground line 131, and surrounds the display area 101 and the first ground line 131, and both the first ground line 131 and the second ground line 132 are disposed in an unclosed surrounding manner.
The display panel 10 is provided with an insulating layer 14, and the insulating layer 14 is used for forming an insulating environment between the plurality of ground lines and between the touch trace 122 and the ground lines, so as to prevent signals between the lines from interfering with each other. The insulating layer 14 between the first ground line 131 and the touch trace 122 and between the first ground line 131 and the second ground line 132 can effectively prevent static electricity from jumping between the lines and finally entering the substrate. In some alternative embodiments, the insulating layer 14 is entirely laid on the surface of the substrate 11 on the side where the electronic device 12 is disposed, and covers the touch electrode 121, the touch trace 122 and the plurality of ground lines 13, so that the circuit elements can be protected at the same time, and a certain distance can be provided between the first electrode 121a and the second electrode 121b to form a desired touch capacitance.
In some optional embodiments, the display panel 10 further includes a flexible circuit board 15, and the flexible circuit board 15 is electrically connected to the touch electrode 121 through the touch trace 122, so as to implement a touch function required by the display panel 10. Meanwhile, the first ground line 131 and the second ground line 132 may be electrically connected to pins of the flexible circuit board 15, and the flexible circuit board 15 provides corresponding voltage signals, and at this time, the first ground line 131 and the second ground line 132 may be electrically connected to the same pin, or may be respectively connected to a plurality of pins.
Referring to fig. 3, fig. 3 is an enlarged view of a region P in fig. 1. The minimum distance between the touch trace 122 and the ground line 13 in the display panel 10 is S1, the minimum distance between the first ground line 131 and the second ground line 132 is S2, the breakdown field strength of the second insulating structure 142 at the minimum distance S2 is set to be C2, and the test voltage of the display panel 10 is V, then the minimum distance S2 is set to be V/C2 ≤ S2 ≤ 1.5V/C2.
The design method of the minimum distance S2 between the first ground line 131 and the second ground line 132 is the same as the design method of the minimum distance S1, and the test voltage V of the panel and the breakdown voltage C2 of the second insulating structure 142 at the minimum distance S2 are used to calculate to obtain the optimal distance, and the size of the minimum distance S2 is 1-1.5 times of the optimal distance, so that a better technical effect can be obtained.
In some optional embodiments, the first ground line 131, the second ground line 132, and the touch trace 122 are disposed in parallel, and the minimum distance S1 is equal to the minimum distance S2.
By arranging the first ground line 131, the second ground line 132 and the touch trace 122 in parallel, the three types of circuit traces can have the same and uniform spacing, and the possibility of static electricity jumping among the traces is further reduced. And making the minimum distance S1 equal to the minimum distance S2 can further simplify the calculation and facilitate the processing of the display panel 10.
Optionally, corners formed when the first ground line 131, the second ground line 132, and the touch trace 122 are bent at four corners of the display panel 10 are obtuse angles or rounded angles. For example, the traces can be oriented by deflecting in the same direction to form two obtuse angles of 135 ° to complete a 90 ° orientation transition, or by forming a quarter-circle arc to complete a 90 ° orientation transition. Therefore, the disconnection or the cracking of the circuit wiring can be avoided, and the reliability of the display panel is further improved.
Referring to fig. 2 again, in some alternative embodiments, the connection trace 122, the first ground line 131 and the second ground line 132 are disposed in the same layer, and the width of the second ground line 132 is 1 to 3 times the width of the connection trace 122. The three types of circuit wires are arranged on the same side of the substrate 11, and the same layer arrangement can be used for completing the manufacture of all the circuit wires in one-step processing, so that the processing cost is saved, and the production efficiency is improved. Meanwhile, the wiring distance and the breakdown field intensity are convenient to determine, and therefore a more accurate and simple structural design is obtained.
Optionally, when any two of the touch trace 122, the first ground line 131 and the second ground line 132 are disposed in different layers, their orthographic projections on the substrate do not overlap, so as to avoid forming parasitic capacitance and affecting the accuracy of the signal. Meanwhile, when the wires are arranged on different layers, if the wires on different layers are made of insulating materials with the same material, the breakdown electric field intensity C1 is tested according to the position where the straight line distance between the wires is the shortest; if the straight-line distance connecting line between the wires in different layers passes through the interfaces between different insulating materials, performing weighted calculation on the breakdown field strengths of the different insulating materials according to the length of the connecting line divided into two sections by the interface to obtain the final breakdown field strength C1; if a substrate layer made of materials such as polyester resin (PET) is sandwiched between two layer structures where the wires of different layers are located, weighting calculation can be performed according to the length of the shortest straight-line distance connecting line penetrating through each layer of insulating material and the breakdown strength of each layer of material. And the thickness of the substrate layer is generally greater than that of the conventional insulating layer, and thus, the substrate layer is generally not easily broken down in this case, but the overall thickness of the display panel 10 is increased. Based on this, this application does not do specific restriction to the layer structure of walking, can select by oneself according to technology demand and user demand.
In some optional embodiments, the width of the second ground line 132 is greater than the width of the first ground line 131 and the width of the touch trace 122, specifically, the width of the second ground line 132 is 1 to 3 times the width of the touch trace 122, and the width of the second ground line 132 is 1 to 2.5 times the width of the first ground line 131. The second ground line 132 is located at the periphery of the first ground line 131, and when static electricity is generated outside the display panel, the second ground line 132 intercepts and releases the static electricity first, so that the width of the second ground line 132 is increased, the static electricity protection capability of the second ground line 132 can be effectively enhanced, the static electricity invading from the outside is intercepted at the outermost periphery, and the static electricity protection function of the display panel 10 is further optimized. It is expected that the wider the width of the second ground line 132, the stronger the protection and discharge capability against external static electricity, but as the width increases, the display device using the display panel 10 will also have a wider frame, so that the screen occupation ratio and the priority of the static electricity protection capability in the display device can be chosen, which is not particularly limited in the present application.
Referring to fig. 4 and 5 together, fig. 4 is a schematic structural diagram of a display panel according to another embodiment of the present application, and fig. 5 is an enlarged view of a region Q in fig. 4. In some alternative embodiments, the first ground line 131 is provided as at least two lines parallel to each other. That is, the display panel 10 is provided with a plurality of parallel first ground lines 131, adjacent first ground lines 131 are insulated from each other by the insulating layer 14, the widths of the plurality of first ground lines 131 are the same, and the distances between adjacent first ground lines 131 are the same.
It is understood that the insulating layer 14 between adjacent first ground lines 131 may be a unified insulating structure, or the insulating layer 14 between adjacent first ground lines 131 may be a plurality of adjacent and different insulating structures. The insulation structure in the display panel 10 is generally a film structure made of an insulation material, and the breakdown field strength of the insulation structure is greatly different according to different parameters such as film forming conditions and doping concentration of the films, so that in the actual design process, the insulation structure at the position of the minimum distance between the adjacent first ground lines 131 needs to be tested, and accurate design can be performed after actual data are obtained.
The display panel 10 provided in the embodiment of the application has a ground line for electrostatic protection, and the ground wire may include a first ground line 131 and a second ground line 132, on this basis, the electrostatic protection capability of the display panel 10 may be further improved by simultaneously providing a plurality of first ground lines 131, that is, the number of layers of ground lines for intercepting static electricity entering from a certain direction jump is increased, a path through which the static electricity intrudes is required to pass is lengthened, and the static electricity is controlled outside the display area 101 by intercepting and releasing the static electricity through the plurality of first ground lines 131, so as to avoid the problem of display panel malfunction.
At this time, the plurality of first ground lines 131 are arranged in parallel and have equal widths, so as to facilitate processing and calculation of the optimal distance between adjacent first ground lines 131, similarly to the previous embodiment, the insulating layer 14 is arranged between every two adjacent first ground lines 131, when the wiring design is performed, the minimum distance between adjacent first ground lines 131 is S3, the breakdown field strength of the insulating layer 14 at this position is C3, the optimal distance between adjacent first ground lines 131 is the ratio of the test voltage V to the breakdown field strength C3, and S3 is 1-1.5 times of the minimum distance, that is, 1.5V/C3 is not less than S3 and not less than V/C3.
In some alternative embodiments, the insulating layer 14 is made of at least one of silicon oxide, silicon nitride, and organic polymer insulating material; the first ground line 131, the second ground line 132 and the touch trace 122 are made of at least one of molybdenum, titanium and molybdenum-aluminum-molybdenum lamination; the touch electrode 121 is made of at least one of indium tin oxide and nano silver, and may be provided in the form of a metal mesh electrode.
The common insulating materials silicon nitride and silicon oxide in the display technology field can be adopted in the display panel 10 as the material of the insulating layer 14, the insulating properties of silicon nitride and silicon oxide are good, the silicon nitride and silicon oxide are wear-resistant and can resist cold and hot impact, a stable insulating effect can be provided, the common polymer insulating materials are usually high-molecular polymers, the common insulating materials comprise plastics, rubber, fibers, insulating paint and the like, when the organic polymer insulating materials are adopted as the material of the insulating layer 14, the insulating layer 14 can be an insulating layer covering circuit wiring and touch electrodes 121, or the insulating layer 14 can be an outer coating layer coating the positions between the circuit wiring and between the touch electrodes 121 needing insulation, a protective coating can be coated, the insulating effect between the wiring and the electrodes can be achieved, and the application does not make specific limitation.
Meanwhile, the first and second ground lines 131 and 132 may be made of molybdenum metal, titanium metal, or a molybdenum-aluminum-molybdenum laminate material in the display panel 10. The three materials have low impedance, high release efficiency and good conductivity, and can effectively conduct static electricity out, thereby further improving the static protection capability of the display panel 10. On the contrary, if the ground line is made of a material having a high impedance, the ground line may be burned out when high-voltage static electricity occurs, and the pixel circuit may be broken down or malfunction.
Further, the touch electrode 121 may be made of indium tin oxide, nano silver, or the like, or the touch electrode 121 may be a metal grid electrode in the display panel 10. The three methods can be used to manufacture flexible transparent electrodes, in which indium tin oxide has good electrical conductivity, but with the problems of cost increase and supply limitation caused by insufficient indium element content, there are currently extensive attempts to find alternatives. On the basis, the metal grid transparent electrode and the silver nanowire grid electrode are applied to a certain degree, wherein the metal grid electrode has good flexibility, the contradiction between low impedance and high light transmittance of the transparent electrode can be solved only by changing the line width, the period, the aspect ratio, the shape and the arrangement of the grid, and the transparent electrode can be cut according to the actual electrical performance requirement and the optical performance requirement, so that the low impedance and the high light transmittance are ensured to be obtained at the same time. The silver nanowire grid electrode also has good conductivity and flexibility and good photoelectric characteristics, and the silver nanowire grid electrode regularly arranged can well realize balance of photoelectric comprehensive performance. Therefore, the touch electrode 121 is manufactured by the three methods, so that the display panel has more excellent optical and electrical properties. The method can be selected according to the process requirements, the cost and the like in actual production and use, and the method is not particularly limited in the application.
In some alternative embodiments, the insulating layer 14 may be formed by laminating a plurality of film layers, the first insulating layer covers the first ground line 131, the second ground line 132, the touch trace 122 and the second electrode 121b, the second insulating layer covers the first electrode 121a and is laminated with the first insulating layer, and an orthographic projection of the second insulating layer on the substrate 11 may be an orthographic projection of the first insulating layer on the substrate 11.
In this case, the first insulating layer and the second insulating layer may be made of the same material or different materials. When the same material is used, the first insulating layer and the second insulating layer may be formed by first forming the first insulating layer, then performing vapor deposition on the first electrode 121a, and then forming the second insulating layer thereon. When different materials are adopted, two insulating materials with good fusion and adhesion between the two insulating materials are needed to be used so as to ensure that the first insulating layer and the second insulating layer are connected firmly and the problems of cracking and layering at the interface of the two insulating layers in the subsequent use process can be avoided. The first insulating layer may be made of an insulating material having higher breakdown strength and better insulating property, so that the first ground line 131 and the second ground line 132 may have better anti-static-trip effect and a narrower gap, and meanwhile, the second insulating layer may be made of a common insulating material to reduce cost.
In some alternative embodiments, the ground line 13 is disposed on the same layer as the electronic device 12, and the device body 121 includes a touch electrode disposed in the display region 101.
In some alternative embodiments, the ground wires 13 are provided with the disconnection openings 133, i.e., at least one disconnection opening 133 is provided in each ground wire 13. When the display panel is provided with the wiring that is surrounded by the closed loop and grounded, a part of the rf signal transmitted or received by the element in the area surrounded by the wiring will be absorbed by the wiring, resulting in signal attenuation and abnormal communication, so at least one opening 133 needs to be provided in the ground line to prevent the signal of the antenna and other devices in the display device using the display panel 10 from being interfered due to the formation of the completely closed wiring loop. Alternatively, the disconnection openings 133 of the first and second ground lines 131 and 132 may be disposed at the middle of the opposite sides of the flexible circuit board 15, so that the ground lines 13 on both sides are symmetrically disposed, thereby obtaining a good and uniform shielding effect.
The display panel 10 provided in the embodiment of the present application may further include, in addition to the foregoing components, an encapsulation layer, a light emitting element, and a thin film transistor array corresponding to the electronic device 12 in the display panel 10, and may control light emission of the light emitting element by the thin film transistor array, thereby implementing normal display of the display panel 10.
The present application further provides a display device, which includes the above-mentioned display panel 10, and the display device can be any product or component with a display function, such as a mobile phone, a tablet computer, a digital photo frame, and electronic paper. The display device provided in the embodiment of the present application has all the advantages of the display panel 10 provided in the embodiment of the present application, and specific reference may be specifically made to the specific description of the display panel 10 in each of the above embodiments, which is not described herein again.
It is to be understood that both the foregoing description and the following detailed description are exemplary and explanatory only and are not restrictive of the application, as various changes and modifications may be effected therein by those skilled in the art without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A display panel, comprising:
a substrate;
an electronic device disposed on one side of the substrate;
the grounding wire is arranged on the outer side of the electronic device along the circumferential direction;
an insulating layer comprising a first insulating structure disposed between the ground line and the electronic device, a minimum distance S1 of the ground line from the electronic device being set to: V/C1 is not less than S1 is not less than 1.5V/C1, wherein V is a test voltage, and C1 is the breakdown field strength of the first insulating structure.
2. The display panel according to claim 1, wherein the display panel has a display area and a non-display area provided at a periphery of the display area; the electronic device comprises a device main body arranged in a display area and a connecting wire connected to the device main body and extending along the non-display area; the grounding wire extends along the non-display area, and the minimum distance between the grounding wire and the connecting wire is the minimum distance S1 between the grounding wire and the electronic device.
3. The display panel of claim 2, wherein the ground lines comprise a first ground line and a second ground line, the first ground line being disposed between the second ground line and the connection trace, the insulating layer further comprising a second insulating structure disposed between the second ground line and the first ground line.
4. The display panel according to claim 3, wherein a minimum distance S2 between the first ground line and the second ground line is set to: V/C2 is not less than S2 is not less than 1.5V/C2, wherein V is test voltage, and C2 is breakdown field strength of the second insulation structure.
5. The display panel according to claim 3, wherein the first ground line, the second ground line and the connection trace are arranged in parallel, and the minimum distance S1 is equal to the minimum distance S2.
6. The display panel according to claim 3, wherein the connection trace, the first ground line and the second ground line are disposed on the same layer, and a width of the second ground line is 1 to 3 times a width of the connection trace.
7. The display panel according to claim 3, wherein the first ground line is provided in at least two lines parallel to each other.
8. The display panel according to claim 2, wherein the ground line is provided on the same layer as the electronic device, and the device main body includes a touch electrode provided in a display area.
9. The display panel according to claim 1, wherein the ground line is provided with a break opening.
10. A display device comprising the display panel according to any one of claims 1 to 9.
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| CN202111463005.4A CN114203039A (en) | 2021-12-02 | 2021-12-02 | Display panel and display device |
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| CN202111463005.4A CN114203039A (en) | 2021-12-02 | 2021-12-02 | Display panel and display device |
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