Display panel and display device

Abstract

The invention provides a display panel and a display device, and the display panel comprises a substrate which comprises a display area and a peripheral area surrounding the display area; the peripheral area comprises a first peripheral area located on one side of the display area in the first direction; the flexible circuit board is located in the first peripheral area and provided with a plurality of binding terminals and at least one driving terminal, the binding terminals are used for being bound with the driving unit, and the driving terminal is connected with the driving unit; the plurality of shielding terminals and the plurality of binding terminals are positioned on the same side of the first substrate base plate in the first peripheral area; the plurality of shielding terminals are connected with the driving terminal, the orthographic projections of the plurality of shielding terminals on the substrate are located between the orthographic projections of the plurality of binding terminals on the substrate, and the voltage values of the shielding terminals are located between the voltage values of two adjacent binding terminals within the orthographic projection range of the substrate. And the electrochemical corrosion risk of the binding terminal is reduced while the influence on the arrangement of the binding terminal is reduced.

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] At present, the binding terminals of the flexible circuit boards in OLED (Organic Light-Emitting Diode) products are mainly connected to the inside of the display panel or the drive unit through the SD film layer. There is a voltage difference between different binding terminals. A large voltage difference may cause electrochemical reactions between the binding terminals during long-term operation. That is, under the action of the electric field, the charged particles in the medium will move in a directional manner and oxidize the metal of the binding terminals, resulting in corrosion of the binding terminals or abnormal display of the display panel. Summary of the invention

[0003] In view of this, an object of the present application is to provide a display panel and a display device that overcome the above problems or at least partially solve the above problems.

[0004] Based on the above purpose, in a first aspect of the present application, a display panel is provided, wherein the display panel comprises:

[0005] A substrate, comprising: a display area and a peripheral area surrounding the display area; the peripheral area comprises a first peripheral area located at one side of the display area in a first direction;

[0006] A flexible circuit board, located in the first peripheral area, provided with a plurality of binding terminals and at least one driving terminal, wherein the binding terminal is used to bind with the driving unit, and the driving terminal is connected with the driving unit;

[0007] A plurality of shielding terminals are located on the same side of the base substrate as the plurality of binding terminals in the first peripheral area; the plurality of shielding terminals are connected to the driving terminals, the orthographic projections of the plurality of shielding terminals on the base substrate are located between the orthographic projections of the plurality of binding terminals on the base substrate, and the voltage value of the shielding terminal is located between the voltage values ​​of two adjacent binding terminals within the orthographic projection range of the base substrate.

[0008] Optionally, the multiple shielding terminals include a first shielding terminal, which is arranged between the layer where the base substrate is located and the layer where the flexible circuit board is located, and the orthographic projection of any first shielding terminal on the base substrate is located between the orthographic projections of adjacent binding terminals on the base substrate.

[0009] Optionally, the multiple shielding terminals include a second shielding terminal, which is arranged on a side of the layer where the flexible circuit board is located away from the base substrate, and the orthographic projection of any second shielding terminal on the base substrate is located between the orthographic projections of adjacent binding terminals on the base substrate.

[0010] Optionally, the plurality of shielding terminals include a first shielding terminal and a second shielding terminal, the first shielding terminal is arranged between the layer where the base substrate is located and the layer where the flexible circuit board is located, and the orthographic projection of any of the first shielding terminals on the base substrate is located within the orthographic projection range of the adjacent binding terminal on the base substrate;

[0011] The second shielding terminal is arranged on a side of the layer where the flexible circuit board is located away from the base substrate, and the orthographic projection of the second shielding terminal on the base substrate coincides with the orthographic projection of the first shielding terminal on the base substrate.

[0012] Optionally, the at least one driving terminal includes at least one binding terminal, wherein the voltage between the binding terminal and an adjacent binding terminal is the same or the voltage difference between the binding terminal is less than a first threshold.

[0013] Optionally, the at least one driving terminal is arranged in parallel with the multiple binding terminals and is located at the edge of the area where the multiple binding terminals are located.

[0014] Optionally, the plurality of binding terminals are distributed along the second direction, the plurality of binding terminals include a plurality of binding groups along the second direction, the orthographic projection of the shielding terminal on the base substrate is located between the orthographic projections of adjacent binding groups on the base substrate, and the voltage value of the shielding terminal is located between the voltage values ​​of adjacent binding terminals within the orthographic projection range of the base substrate;

[0015] The voltages between adjacent binding terminals in any binding group are the same or the voltage difference is smaller than a first threshold, and the voltages of the plurality of binding terminals decrease or increase in sequence along the second direction.

[0016] Optionally, the first shielding terminal and the second shielding terminal are respectively connected to the same driving terminal and / or different driving terminals.

[0017] Optionally, the voltage value of the shielding terminal is an average value of voltage values ​​of the adjacent binding terminals located within the orthographic projection range of the substrate.

[0018] Optionally, a signal line is provided in the display area, and the driving terminal and the binding terminal are provided in the same layer as the signal line.

[0019] A second aspect of the present application provides a display device, comprising the display panel described in the first aspect.

[0020] As can be seen from the above, the display panel and display device provided by the embodiment of the present application utilize different layers of shielding terminals and binding terminals, and the voltage value applied to the shielding terminal is between the voltage values ​​of adjacent binding terminals within the positive projection range of the substrate, thereby reducing the voltage difference between the binding terminals and changing the direction of charge movement between the adjacent binding terminals, thereby reducing the risk of electrochemical corrosion caused by the electric field generated by the voltage difference between the binding terminals, and avoiding occupying the space of the binding terminals, that is, the space occupied by the first peripheral area, which is conducive to realizing a narrow frame of the display panel. When the width of the first peripheral area is constant, there is no need to reduce the spacing between the binding terminals, thereby avoiding a significant increase in the difficulty of the bonding process.

[0021] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution in the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1a This is a schematic diagram of the electric field distribution of the binding terminal according to an embodiment of the present application;

[0024] Figure 1b An equivalent circuit diagram of an electric field of an embodiment of the present application;

[0025] Figure 1c This is a schematic diagram of electrochemical corrosion principle of an embodiment of the present application;

[0026] Figure 2 A schematic diagram of the distribution of binding terminals and virtual terminals according to an embodiment of the present application;

[0027] Figure 3 This is a schematic diagram of the minimum spacing requirements between metals on the same layer;

[0028] Figure 4 This is a schematic diagram of the width of the binding area after adding a virtual terminal in one embodiment of the present application;

[0029] Figure 5 This is a schematic diagram of electric field distribution after adding virtual terminals in one embodiment of the present application;

[0030] Figure 6 A schematic diagram of a shielding terminal according to an embodiment of the present application;

[0031] Figure 7 This is a schematic diagram of the connection between a driving terminal and a shielding terminal in an embodiment of the present application;

[0032] Figure 8 This is a schematic diagram of the arrangement of the driving terminals and the shielding terminals in the first peripheral area in an embodiment of the present application;

[0033] Figure 9a This is a schematic diagram of electric field distribution in an embodiment of the present application;

[0034] Figure 9b In the embodiment of this application Figure 9a Schematic diagram of electric field distribution;

[0035] Fig.10 This is another schematic diagram of a shielding terminal in an embodiment of the present application;

[0036] Fig.11 This is a schematic diagram of the third shielding terminal in the embodiment of the present application;

[0037] Fig.12 This is a schematic diagram of using the binding terminal as the driving terminal in the embodiment of the present application. DETAILED DESCRIPTION

[0038] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0039] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings 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 or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "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.

[0040] As shown in Table 1 below, the current OLED products have various signals during operation, and there are many signals that generate voltage differences, such as the positive voltage of VGH (gate turn-on voltage), the negative voltage of VGL gate turn-on voltage (VGL), and the square wave AC signal of CLK (clock signal). Figure 1a to Figure 1c As shown, the binding terminal 11 with a large voltage acts as an anode, and the binding terminal 11 with a small voltage acts as a cathode. Under the action of the electric field caused by the voltage difference, the cations in the medium between the cathode and the anode move toward the cathode, and the anions move toward the anode, resulting in metal oxidation of the binding terminal 11, corrosion of the binding terminal 11 or abnormal display of the display panel.

[0041] Table 1

[0042]

[0043] In some embodiments, in order to solve the electrochemical corrosion caused by the voltage difference between different binding terminals 11, one or more virtual terminals 12 (dummy pins) are added between the binding terminals 11 with a larger voltage difference. The virtual terminals 12 are not connected to any signal. Figure 3 and Figure 4 As shown, the distance d between the binding terminals 11 is increased by the virtual terminal 12, the capacitance C is reduced, and when the voltage of the binding terminals 11 is the same, the amount of moving charges is reduced, that is, the amount of movement of charged particles is reduced, thereby reducing the risk of electrochemical corrosion.

[0044] The specific principles are as follows:

[0045] Q=U*C,

[0046] C = εS / 4πkd,

[0047] Among them, Q represents the charge, U represents the voltage, C represents the capacitance, ε represents the dielectric constant of the medium between the plates, that is, the dielectric constant of the medium between the binding terminals 11, S represents the facing area of ​​the plates, that is, the facing area of ​​the binding terminals 11, k represents the electrostatic force constant, and d represents the distance between the capacitor plates, that is, the distance between the binding terminals 11.

[0048] However, this solution still has corresponding limitations:

[0049] 1. As OLED driving technology becomes increasingly complex, the number of binding terminals 11 increases with the increase of functions. In addition, as OLED products become thinner and smaller, the width of the binding area of ​​the display panel becomes narrower. The space available for adding virtual terminals 12 is limited, and it is impossible to cover all binding terminals 11 with voltage differences. Figure 3 and Figure 4As shown, in the design process of the display panel, there is a minimum space requirement between the same layer of metal, and there is a minimum spacing (pitch) requirement between the same layer of metal. If n virtual terminals 12 are added, the binding area needs to increase n*pitch in the distribution direction of the binding terminal 11, which increases the process difficulty and cannot effectively limit the width of the binding area.

[0050] 2.Reference Figure 5 As shown, adding virtual terminals 12 mainly improves electrochemical corrosion by increasing the spacing, but the direction of the electric field does not change, and the charges will still move along the direction of the electric field lines. While the width of the binding area cannot be effectively limited, there is still a risk of electrochemical corrosion.

[0051] 3.Reference Figure 2 As shown, after adding the dummy terminals 12, the overall number of dummy terminals 12 and binding terminals 11 increases. When the total width of the binding area is constant, the terminal pitch needs to be reduced, which will increase the difficulty of the bonding process and reduce the production yield.

[0052] Based on this, reference Figures 6 to 12 As shown, an embodiment of the present application provides a display panel, the display panel comprising:

[0053] The base substrate 10 includes: a display area and a peripheral area surrounding the display area; the peripheral area includes a first peripheral area located at one side of the display area in a first direction X.

[0054] The flexible circuit board is located in the first peripheral area and is provided with a plurality of binding terminals 11 and at least one driving terminal 22 . The binding terminal 11 is used to bind with the driving unit 20 , and the driving terminal 22 is connected with the driving unit 20 .

[0055] A plurality of shielding terminals 21, and a plurality of binding terminals 11 in a first peripheral area are located on the same side of the base substrate 10; the plurality of shielding terminals 21 are connected to the driving terminals 22, and the orthographic projections of the plurality of shielding terminals 21 on the base substrate 10 are located between the orthographic projections of the plurality of binding terminals 11 on the base substrate 10, and the voltage values ​​of the plurality of shielding terminals 21 are located between the voltage values ​​of the adjacent binding terminals 11 within the orthographic projection range of the base substrate 10.

[0056] The display panel provided by the embodiment of the present application, in the first peripheral area, is arranged in different layers using the binding terminal 11 and the shielding terminal 21, and is located between two adjacent binding terminals 11 within the positive projection range of the base substrate 10, and the voltage of the shielding terminal 21 is between the voltage values ​​of the two adjacent binding terminals 11. It plays the role of electric field shielding between the two adjacent binding terminals 11. That is, the shielding terminal 21 forms an electric field with the binding terminal 11 with a higher voltage, and also forms an electric field with the binding terminal 11 with a lower voltage, thereby changing the direction of charge movement between the adjacent binding terminals 11. In comparison, the newly formed electric field has a reduced electric field strength due to the reduced voltage difference between the binding terminal 11 and the shielding terminal 21, thereby reducing the risk of electrochemical corrosion between the adjacent binding terminals 11.

[0057] At the same time, the shielding terminal 21 and the binding terminal 11 are arranged in different layers, so there is no need to bind the shielding terminal 21 to the flexible circuit board. Instead, only at least one driving terminal 22 is arranged on the flexible circuit board. The existence of the shielding terminal 21 does not need to occupy the space of the binding terminal 11 and reduces the spacing between the binding terminals 11, thereby improving the yield of the display panel and realizing the narrow frame design of the OLED product without increasing the width of the binding area. For example, in the case where one driving terminal 22 is required as the signal source of the shielding terminal 21, it is only necessary to increase the width of 1*pitch on the flexible circuit board. In the case where two driving terminals 22 are required as the signal source of the shielding terminal 21, it is only necessary to increase the width of 2*pitch on the flexible circuit board, so that any number of shielding terminals 21 can be used to reduce the effect of electrochemical corrosion and minimize the impact of product specifications and processes.

[0058] The driving unit 20 (IC) is used to provide a corresponding voltage to the driving terminal 22 , so that the voltage of the shielding terminal 21 is between the voltage values ​​of the adjacent binding terminals 11 within the orthographic projection range of the base substrate 10 .

[0059] It should be noted that the orthographic projection of the shielding terminal 21 on the base substrate 10 is located between the orthographic projections of adjacent binding terminals 11 on the base substrate 10 with a large voltage difference, and the shielding terminal 21 may not be provided between the binding terminals 11 with a small or no voltage difference between adjacent binding terminals 11. It is understandable that the position of the binding terminal 11 on the flexible circuit board has been determined during the design process of the display panel, and the voltage is also determined accordingly, and the number of the shielding terminals 21 is set accordingly according to the response requirements.

[0060] In some optional embodiments, the driving unit 20 uses timing to control the voltages on different shielding terminals 21 respectively, and controls the voltage value on one shielding terminal 21 at a first moment, and controls the voltage value on another shielding terminal 21 at a second moment, thereby realizing the electric field shielding effect of the shielding terminal 21 between different binding terminals 11.

[0061] In some exemplary embodiments, the first peripheral region may be a binding region, ie, a Bonding region.

[0062] In some optional embodiments, the driving signal of the driving terminal 22 includes one or more of a positive voltage, a negative voltage, an AC square wave signal, and a GND signal.

[0063] In some embodiments, reference Figure 6 , Figure 7 and Figure 8 As shown, the multiple shielding terminals 21 include a first shielding terminal 211, which is arranged between the layer where the base substrate 10 is located and the layer where the flexible circuit board is located, and the orthographic projection of any first shielding terminal 211 on the base substrate 10 is located between the orthographic projections of two adjacent binding terminals 11 on the base substrate 10.

[0064] refer to Figure 9a , Figure 9b As shown, by arranging the first shielding terminal 211 between the flexible circuit board and the base substrate 10, and the orthographic projection of any first shielding terminal 211 on the base substrate 10 is located between the orthographic projections of the adjacent binding terminals 11 on the base substrate 10, the first shielding terminal 211 and the binding terminals 11 are arranged in different layers, and the first shielding terminal 211 forms an electric field with a binding terminal 11 with a high voltage, and also forms an electric field with a binding terminal 11 with a low voltage, so as to change the direction of charge movement between adjacent binding terminals 11, reduce the risk of electrochemical corrosion caused by the voltage difference between adjacent binding terminals 11, and play an electric field shielding role between the binding terminals 11. Figure 4 and Figure 5 Correspondingly, in the embodiment of the present application, the virtual terminal and the binding terminal 11 are both arranged on the flexible circuit board. When there is a minimum spacing requirement between metals on the same layer, the space occupied by the first shielding terminal 211 on the binding terminal 11 is reduced, thereby avoiding a reduction in the distance between the binding terminals 11 and increasing the difficulty of the binding process. At the same time, there is no need to increase the width of the binding space, which is beneficial to the narrow bezel design of the display panel.

[0065] In some embodiments, reference Figure 7 , Figure 8 as well as Fig.10As shown, the multiple shielding terminals include a second shielding terminal 212, which is arranged on a side of the layer where the flexible circuit board is located away from the base substrate 10, and the orthographic projection of the second shielding terminal 212 on the base substrate 10 is located between the orthographic projections of the multiple binding terminals 11 on the base substrate 10.

[0066] Similar to the above embodiment, by arranging the second shielding terminal 212 on the side of the layer where the flexible circuit board is located away from the base substrate 10, and the orthographic projection of any second shielding terminal 212 on the base substrate 10 is located between the orthographic projections of two adjacent binding terminals 11 on the base substrate 10, the second shielding terminal 212 and the binding terminals 11 are arranged in different layers, and the second shielding terminal 212 forms an electric field with a binding terminal 11 with a high voltage, and also forms an electric field with a binding terminal 11 with a low voltage, so as to change the direction of charge movement between adjacent binding terminals 11, reduce the risk of electrochemical corrosion caused by the voltage difference between adjacent binding terminals 11, and play an electric field shielding role between the binding terminals 11. Figure 4 and Figure 5 Correspondingly, in the embodiment of the present application, the virtual terminal and the binding terminal 11 are both arranged on the flexible circuit board. When there is a minimum spacing requirement between metals on the same layer, the space occupied by the second shielding terminal 212 on the binding terminal 11 is reduced, thereby avoiding a reduction in the distance between the binding terminals 11 and increasing the difficulty of the binding process. At the same time, there is no need to increase the width of the binding space, which is conducive to the narrow bezel design of the display panel.

[0067] In some embodiments, reference Fig.11 As shown, the multiple shielding terminals 21 include a first shielding terminal 211 and a second shielding terminal 212. The first shielding terminal 211 is arranged between the layer where the base substrate 10 is located and the layer where the flexible circuit board is located, and the orthographic projection of any first shielding terminal 211 on the base substrate 10 is located between the orthographic projections of adjacent binding terminals 11 on the base substrate 10; the second shielding terminal 212 is arranged on the side of the layer where the flexible circuit board is located away from the base substrate 10, and the orthographic projection of the second shielding terminal 212 on the base substrate 10 coincides with the orthographic projection of the first shielding terminal 211 on the base substrate 10.

[0068] In this embodiment, double-layer or multi-layer metal is used as the shielding terminal, and the first shielding terminal 211 is arranged between the flexible circuit board and the base substrate 10, and the second shielding terminal 212 is arranged on the side of the layer where the flexible circuit board is located away from the base substrate 10, so that the first shielding terminal 211 and the second shielding terminal 212 are arranged on different layers with the binding terminals 11. The first shielding terminal 211 and the second shielding terminal 212 respectively form two electric fields with a binding terminal 11 with a high voltage, and also form two electric fields with a binding terminal 11 with a low voltage, so as to change the direction of charge movement between adjacent binding terminals 11, reduce the risk of electrochemical corrosion caused by the voltage difference between adjacent binding terminals 11, and play an electric field shielding role between the binding terminals 11.

[0069] Furthermore, compared with the case where both the virtual terminal and the binding terminal 11 are arranged on the flexible circuit board, when there is a minimum spacing requirement between metals on the same layer, the space occupied by the first shielding terminal 211 and the second shielding terminal 212 on the binding terminal 11 is reduced, thereby avoiding a reduction in the distance between the binding terminals 11 and thereby increasing the difficulty of the binding process. At the same time, there is no need to increase the width of the binding space, which is beneficial to the narrow frame design of the display panel.

[0070] In some embodiments, reference Fig.12 As shown, at least one driving terminal 22 includes at least one binding terminal 11 , wherein the voltage between the binding terminal 11 and an adjacent binding terminal 11 is the same or the voltage difference between the binding terminal 11 is less than a first threshold.

[0071] In the above embodiment, in order to reduce the risk of electrochemical corrosion of adjacent binding terminals 11 with a voltage difference, a driving terminal 22 is provided on the flexible circuit board, and a corresponding signal is provided to the shielding terminal 21 through the driving terminal 22, so that the voltage value of the shielding terminal 21 is located between the voltage values ​​of the adjacent binding terminals 11 to achieve an electric field shielding effect. Setting the driving terminal 22 on the flexible circuit board will also occupy the binding space of the binding terminal 11. Although the occupied space is small, the corresponding occupation also makes it difficult to achieve a narrow frame of the display panel. Similarly, the space occupied by the driving terminal 22 on the flexible circuit board may compress the setting space of the binding terminal 11, reduce the spacing between the binding terminals 11, and increase the difficulty of the bonding process.

[0072] In this embodiment, the existing binding terminal 11 of the flexible circuit board is used as the driving terminal 22 to provide a corresponding signal to the shielding terminal 21, further reducing the space occupied by the driving terminal 22 in the conventional circuit board. The driving unit 20 provides a corresponding signal to the shielding terminal 21 through the binding terminal 11, so that the voltage value of the shielding terminal 21 is between the voltage values ​​of the adjacent binding terminals 11. There is no voltage difference between the binding terminal 11 and the adjacent binding terminal 11 or the voltage difference is less than the first threshold value, that is, there is no electrochemical corrosion between the binding terminal 11 and the adjacent binding terminal 11 or the electrochemical corrosion effect is very small. Using the binding terminal 11 as the driving terminal 22, during the period when the binding terminal 11 is used as the binding terminal 11, it will not electrochemically corrode with the adjacent binding terminal 11 or the electrochemical corrosion effect is very small. During the period when the binding terminal 11 is used as the driving terminal 22, due to the timing control, the time is very short, so the time for the electrochemical corrosion reaction between the binding terminal 11 and the adjacent binding terminal 11 is very short, and the risk of electrochemical corrosion is also not high.

[0073] In some exemplary embodiments, the first threshold may be 0.1V.

[0074] In some embodiments, reference Figure 8 As shown, at least one driving terminal 22 is arranged in parallel with a plurality of binding terminals 11 and is located at the edge of the area where the binding terminals 11 are located.

[0075] This embodiment is different from the above embodiment in that the driving terminal 22 is separately arranged on the flexible circuit board and arranged in parallel with the binding terminal 11. The driving terminal 22 is arranged at the edge of the area where the binding terminal 11 is located. In the process of preparing the driving terminal 22, there is no need to change the mask of the binding terminal 11. After the preparation of the binding terminal 11 is completed, a mask is added to realize the preparation of the driving terminal 22.

[0076] In some embodiments, reference Figure 8 As shown, a plurality of binding terminals 11 are distributed along the second direction Y, and the plurality of binding terminals 11 include a plurality of binding groups 25 along the second direction, and the orthographic projection of the shielding terminal 21 on the base substrate 10 is located between the orthographic projections of adjacent binding groups 25 on the base substrate 10, and the voltage value of the shielding terminal 21 is located between the voltage values ​​of two adjacent binding terminals 11 within the orthographic projection range of the base substrate 10. The voltages between adjacent binding terminals 11 in any binding group 25 are the same or the voltage difference is less than the first threshold, and the plurality of binding terminals 11 decrease or increase in sequence along the second direction.

[0077] The binding terminal 11 is used to bind with the driving unit 20. With the increasing complexity of OLED driving technology, the number of binding terminals 11 is increasing. For a large number of binding terminals 11, the distribution of the binding terminals 11 is achieved by successively reducing or increasing the voltage of the binding terminals 11 along the second direction Y. For the binding terminals 11, not all binding terminals 11 have a voltage difference that causes electrochemical corrosion. Shielding terminals 21 are set between the corresponding binding terminals 11 that do not have electrochemical corrosion or have very little electrochemical corrosion, which increases the process flow, causes resource waste, and increases the process difficulty, reducing product yield. In this embodiment, the arranged binding terminals 11 are grouped, and the voltages between adjacent binding terminals 11 in the same group are the same or the voltage difference is less than the first threshold. The same voltage or small voltage difference makes it very unlikely that electrochemical corrosion will occur between the binding terminals 11 in the group or that electrochemical corrosion will not occur. The shielding terminal 21 is only set between the binding groups 25, and the voltage difference between adjacent binding terminals 11 between adjacent binding groups 25 is not less than the first threshold. Then, an electric field will be generated between the adjacent binding terminals 11 due to the large voltage difference, so that the charges in the medium between the binding terminals 11 will move, causing electrochemical corrosion of the binding terminals 11.

[0078] The voltage of the binding terminals 11 decreases or increases successively along the second direction, which helps to divide the binding terminals 11 into multiple binding groups 25 without affecting the number of the binding terminals 11. By setting shielding terminals 21 between the binding groups 25, the electric field shielding effect between the binding groups 25 is achieved, thereby reducing the risk of electrochemical corrosion of the binding terminals 11.

[0079] It is understandable that, within each binding group 25, the number of binding terminals 11 is not fixed.

[0080] In some embodiments, the first shielding terminal 211 and the second shielding terminal 212 are respectively connected to the same driving terminal 22 and / or different driving terminals 22 .

[0081] In some embodiments, the first shielding terminal 211 and the second shielding terminal 212 are both connected to the same driving terminal 22. The driving terminal 22 acts as a signal source and provides signals to the first shielding terminal 211 and the second shielding terminal 212 at the same time, and determines that the voltage of the signal at the first shielding terminal 211 and the second shielding terminal 212 is between the voltage values ​​of the adjacent binding terminals 11, that is, the voltage values ​​of the first shielding terminal 211 and the second shielding terminal 212 are the same. The first shielding terminal 211 and the second shielding terminal 212 respectively generate two identical electric fields with the adjacent binding terminals 11 with a larger voltage, and at the same time respectively generate two identical electric fields with the adjacent binding terminals 11 with a smaller voltage. Through the generated new electric field, the direction of charge movement brought by the electric field between the original binding terminals 11 is changed, and the voltage difference between the adjacent binding terminals 11 is reduced through the voltage value of the first shielding terminal 211 and the second shielding terminal 212, thereby reducing the risk of electrochemical corrosion and preventing the binding terminals 11 from being oxidized.

[0082] In other embodiments, the first shielding terminal 211 and the second shielding terminal 212 are respectively connected to different driving terminals 22, that is, one driving terminal 22 is used as a signal source to provide a signal to the first shielding terminal 211, and the other driving terminal 22 is used as a signal source to provide a signal to the second shielding terminal 212. The voltage values ​​of the two signals may be the same or different, but both are between the voltage values ​​of the adjacent binding terminals 11. The first shielding terminal 211 and the second shielding terminal 212 respectively generate two electric fields with the adjacent binding terminals 11 with a larger voltage, and at the same time, they respectively generate two electric fields with the adjacent binding terminals 11 with a smaller voltage. Similarly, the new electric fields generated change the direction of charge movement brought by the electric field between the original binding terminals 11, and the voltage values ​​of the first shielding terminal 211 and the second shielding terminal 212 reduce the voltage difference with the adjacent binding terminals 11, thereby reducing the risk of electrochemical corrosion and preventing the binding terminals 11 from being oxidized.

[0083] In some embodiments, the voltage value of the shielding terminal is an average value of the voltage values ​​of the adjacent binding terminals 11 within the orthographic projection range of the base substrate 10 .

[0084] The main purpose of the shielding terminal 21 is to reduce the voltage difference between the binding terminal 11 and the adjacent binding terminal 11 by having its voltage value located between the voltage values ​​of the adjacent binding terminals 11 within the positive projection range of the substrate 10, and to change the direction of charge movement between adjacent shielding terminals 21, thereby reducing the risk of electrochemical corrosion of the binding terminal 11. In the case where the voltage value of the shielding terminal 21 is located at the average value of the voltage values ​​of the adjacent binding terminals 11 within the positive projection range of the substrate 10, the voltage difference between the shielding terminal 21 and the adjacent binding terminal 11 with a larger voltage is the same as the voltage difference with a smaller voltage, and the voltage difference with the two adjacent binding terminals 11 is reduced to the maximum extent possible. The smaller the voltage difference, the smaller the electric field between the shielding terminal 21 and the binding terminal 11, and the smaller the electric field, the smaller the amount of charge movement between the shielding terminal 21 and the binding terminal 11, further reducing the risk of electrochemical corrosion of the binding terminal 11.

[0085] In some embodiments, a signal line (not shown in the figure) is provided in the display area, and the driving terminal 22 and the binding terminal 11 are provided in the same layer as the signal line.

[0086] In some exemplary embodiments, the OLED display panel is provided with a transistor structure in the display area, and the transistor structure includes a first electrode, a second electrode and a third electrode, wherein the first electrode may be a gate electrode, the second electrode may be a source electrode, and the third electrode may be a drain electrode. In the manufacturing process of the display panel, the source electrode and the drain electrode are generally manufactured in the same layer. Similarly, in the process of patterning the source electrode and the drain electrode, the signal line is manufactured using the same mask process. In the process of patterning the signal line and the source electrode and the drain electrode in the display area, the same mask process is used to pattern the driving terminal 22 and the binding terminal 11 in the first peripheral area, thereby reducing the process flow. It is avoided that after patterning the signal line and the source electrode and the drain electrode in the display area, another mask is used to pattern the driving terminal 22 and the binding terminal 11 again in the first peripheral area.

[0087] Based on the same inventive concept, an embodiment of the present application provides a display device, including a display panel in any of the above embodiments. In some exemplary embodiments, the display device can be: a mobile phone, a tablet computer, a laptop computer, a television, a monitor, a digital photo frame, a navigator, or any other product or component with a display function. Other essential components of the display device should be understood by those skilled in the art, and will not be described in detail here, nor should they be used as a limitation to the present application. The facts of the display device can be found in the above-mentioned embodiments of the display panel, and will not be described in detail here.

[0088] In summary, the display panel and display device provided by the embodiment of the present application utilize different layers of the shielding terminal 21 and the binding terminal 11, and the voltage value applied to the shielding terminal 21 is between the voltage values ​​of the adjacent binding terminals 11 within the positive projection range of the base substrate 10, thereby reducing the voltage difference between the binding terminals 11, and at the same time changing the charge movement direction between the adjacent binding terminals 11, thereby reducing the risk of electrochemical corrosion caused by the electric field generated by the voltage difference between the binding terminals 11, and at the same time avoiding occupying the space of the binding terminals 11, that is, the space occupied by the first peripheral area, which is conducive to realizing a narrow frame of the display panel. When the width of the first peripheral area is constant, there is no need to reduce the spacing between the binding terminals, thereby avoiding a significant increase in the difficulty of the bonding process.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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, wherein: The display panel comprises: A substrate, comprising: a display area and a peripheral area surrounding the display area; the peripheral area comprises a first peripheral area located at one side of the display area in a first direction; A flexible circuit board, located in the first peripheral area, provided with a plurality of binding terminals and at least one driving terminal, wherein the binding terminal is used to bind with the driving unit, and the driving terminal is connected with the driving unit; A plurality of shielding terminals are located on the same side of the base substrate as the plurality of binding terminals in the first peripheral area; the plurality of shielding terminals are connected to the driving terminals, the orthographic projections of the plurality of shielding terminals on the base substrate are located between the orthographic projections of the plurality of binding terminals on the base substrate, and the voltage value of the shielding terminal is located between the voltage values ​​of two adjacent binding terminals within the orthographic projection range of the base substrate.

2. The display panel according to claim 1, characterized in that: The multiple shielding terminals include a first shielding terminal, which is arranged between the layer where the base substrate is located and the layer where the flexible circuit board is located, and the orthographic projection of any first shielding terminal on the base substrate is located between the orthographic projections of adjacent binding terminals on the base substrate.

3. The display panel according to claim 2, characterized in that: The multiple shielding terminals include a second shielding terminal, which is arranged on a side of the layer where the flexible circuit board is located away from the base substrate, and the orthographic projection of any second shielding terminal on the base substrate is located between the orthographic projections of adjacent binding terminals on the base substrate.

4. The display panel according to claim 1, characterized in that: The plurality of shielding terminals include a first shielding terminal and a second shielding terminal, the first shielding terminal is arranged between the layer where the base substrate is located and the layer where the flexible circuit board is located, and the orthographic projection of any of the first shielding terminals on the base substrate is located within the orthographic projection range of the adjacent binding terminal on the base substrate; The second shielding terminal is arranged on a side of the layer where the flexible circuit board is located away from the base substrate, and the orthographic projection of the second shielding terminal on the base substrate coincides with the orthographic projection of the first shielding terminal on the base substrate.

5. The display panel according to claim 1, characterized in that: The at least one driving terminal includes at least one of the binding terminals, wherein the voltage between the binding terminal and an adjacent binding terminal is the same or the voltage difference between the binding terminal and the adjacent binding terminal is less than a first threshold.

6. The display panel according to claim 1, characterized in that: The at least one driving terminal is arranged in parallel with the plurality of binding terminals and is located at the edge of the area where the plurality of binding terminals are located.

7. The display panel according to claim 1, characterized in that: The plurality of binding terminals are distributed along a second direction, the plurality of binding terminals include a plurality of binding groups along the second direction, the orthographic projection of the shielding terminal on the base substrate is located between the orthographic projections of adjacent binding groups on the base substrate, and the voltage value of the shielding terminal is located between the voltage values ​​of adjacent binding terminals within the orthographic projection range of the base substrate; The voltages between adjacent binding terminals in any binding group are the same or the voltage difference is smaller than a first threshold, and the voltages of the plurality of binding terminals decrease or increase in sequence along the second direction.

8. The display panel according to claim 4, characterized in that: The first shielding terminal and the second shielding terminal are respectively connected to the same driving terminal and / or different driving terminals.

9. The display panel according to claim 7, characterized in that: The voltage value of the shielding terminal is an average value of the voltage values ​​of the adjacent binding terminals located within the orthographic projection range of the base substrate.

10. The display panel according to claim 1, characterized in that: A signal line is arranged in the display area, and the driving terminal and the binding terminal are arranged in the same layer as the signal line.

11. A display device, characterized in that: A display panel comprising any one of claims 1 to 10.

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