Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel comprises a display area and a non-display area surrounding the display area. Wherein the non-display area comprises an array substrate which further extends to the display area; the non-display signal transmission line is located on one side of the array substrate and located on at least one side of the display area; and the orthographic projection of the signal shielding layer on the array substrate is partially overlapped with the orthographic projection of the non-display signal transmission line on the array substrate. According to the technical scheme provided by the invention, the signal quality of the non-display signal and the signal quality of the display signal are improved, and the working performance of the display panel is improved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] With the development of display technology, people have higher and higher requirements on the display image quality of display panels, and at the same time, the requirements on the non-display functions of display panels are also getting higher and higher.

[0003] In existing organic light emitting display panels, there is a problem of signal interference between display signals and non-display signals, which reduces the working performance of the display panel. Summary of the invention

[0004] Embodiments of the present invention provide a display panel and a display device to improve the working performance of the display panel.

[0005] According to one aspect of the present invention, there is provided a display panel, comprising: a display area and a non-display area surrounding the display area; wherein the non-display area comprises:

[0006] The array substrate also extends to the display area;

[0007] A non-display signal transmission line, located on one side of the array substrate and located on at least one side of the display area;

[0008] The signal shielding layer has an orthographic projection on the array substrate that at least partially overlaps with an orthographic projection of the non-display signal transmission line on the array substrate.

[0009] Optionally, the polarity of the electrical signal on the signal shielding layer is the same as that of the electrical signal on the non-display signal transmission line;

[0010] Preferably, the non-display signal transmission line includes a touch signal transmission line;

[0011] The signal shielding layer is used to shield the touch signal and the display signal in the display panel; wherein the orthographic projection of the signal shielding layer on the array substrate at least partially overlaps with the orthographic projection of the display signal transmission line on the array substrate, and the signal shielding layer is located between the touch signal transmission line and the display signal transmission line in a direction perpendicular to the array substrate;

[0012] Preferably, the display area includes sub-pixels arranged in an array; the non-display area includes a first sub-area, a second sub-area, and a third sub-area connecting the first sub-area and the second sub-area; wherein the first sub-area and the second sub-area are located on opposite sides of the display area and extend along a first direction; the third sub-area extends along a second direction; and the second direction intersects the first direction;

[0013] Wherein, the touch signal transmission line is located in the first sub-area and the second sub-area; the signal shielding layer is located in the first sub-area, the second sub-area and the third sub-area;

[0014] Preferably, the non-display area further includes:

[0015] A scan driving circuit; the scan driving circuit and the touch signal transmission line are located on the same side of the display area; wherein the signal shielding layer located in the first sub-area and the second sub-area is located between the touch signal transmission line and the scan driving circuit in a direction perpendicular to the array substrate, and the display signal includes a clock signal in the scan driving circuit.

[0016] Optionally, the signal shielding layer includes a first power transmission line, and the first power transmission line is used to provide a first power signal to the sub-pixel;

[0017] The polarity of the first power signal is the same as the polarity of the touch signal on the touch signal transmission line.

[0018] Optionally, the display panel further includes:

[0019] An auxiliary cathode, located in the display area; the auxiliary cathode is electrically connected to the cathode of the sub-pixel;

[0020] A second power transmission line is located in the non-display area and is located on a different side of the display area from the touch signal transmission line; the second power transmission line is electrically connected to the auxiliary cathode and is used to provide a second power signal to the cathode of the sub-image;

[0021] Preferably, the polarity of the second power signal is opposite to the polarity of the touch signal on the touch signal transmission line;

[0022] Preferably, the second power transmission line is located in the third sub-area.

[0023] Optionally, the display area further includes:

[0024] a plurality of first power lines extending along the first direction and arranged at intervals along the second direction;

[0025] a plurality of first power auxiliary lines extending along the second direction and arranged at intervals along the first direction;

[0026] Wherein, the first power auxiliary line is used to conduct the first power line and the first power transmission line.

[0027] Optionally, the first end of the first power auxiliary line is electrically connected to the first power transmission line located in the first sub-area; the second end of the first power auxiliary line is electrically connected to the first power transmission line located in the second sub-area;

[0028] Wherein, the electrical connection portion where the first power auxiliary line is connected to the first power line is located in an overlapping area between the first power auxiliary line and the first power line;

[0029] Preferably, the first power line and the first power auxiliary line are located in the same metal layer, or in different metal layers.

[0030] Optionally, the auxiliary cathode comprises a grid shape, and the auxiliary cathode comprises:

[0031] a plurality of first auxiliary cathode strips extending along the first direction and arranged at intervals along the second direction;

[0032] a plurality of second auxiliary cathode strips extending along the second direction and arranged at intervals along the first direction;

[0033] Wherein, the first auxiliary cathode strip extends to the non-display area and is electrically connected to the second power transmission line.

[0034] Optionally, the display panel further includes:

[0035] A light emitting device layer, located on one side of the array substrate and located in the display area;

[0036] A thin film encapsulation layer is located on a side of the light emitting device layer away from the array substrate and extends from the display area to the non-display area, covering at least a portion of the array substrate;

[0037] A touch electrode layer, located on a side of the thin film encapsulation layer away from the array substrate and located in the display area;

[0038] Among them, the signal shielding layer is located inside the array substrate and / or on the surface of the array substrate close to the thin film encapsulation layer; the touch signal transmission line is located on the side of the thin film encapsulation layer away from the array substrate; the touch signal transmission line is electrically connected to the touch electrode layer.

[0039] Optionally, the signal shielding layer comprises a grid shape.

[0040] According to another aspect of the present invention, a display device is provided, comprising the display panel according to any embodiment of the present invention.

[0041] The technical solution provided by the embodiment of the present invention can reduce the interference of the non-display signal on the non-display signal transmission line, and can also reduce the interference of the non-display signal on the display signal in the display panel by setting a signal shielding layer in the area where the non-display signal transmission line is located; the signal quality of the non-display signal and the signal quality of the display signal are guaranteed, and the working performance of the display panel is improved.

[0042] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0044] Figure 1 is a schematic cross-sectional structure diagram of a display panel provided by an embodiment of the present invention;

[0045] Figure 2 is a schematic diagram of a top view structure of a display panel provided by an embodiment of the present invention;

[0046] Figure 3 yes Figure 2 A supplementary schematic diagram of the first power line in the structure shown;

[0047] Figure 4 is a schematic diagram of a top view structure of a touch electrode layer in a display panel provided by an embodiment of the present invention;

[0048] Figure 5 is a schematic diagram of the positions of a first power transmission line and a second power transmission line in a non-display area of ​​a display panel provided by an embodiment of the present invention;

[0049] Figure 6 is a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the present invention;

[0050] Figure 7 It is a structural schematic diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0051] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0052] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0053] As the background technology shows, with the development of display technology, people have higher and higher requirements on the display quality of display panels, and at the same time, the requirements on the non-display functions of display panels are also getting higher and higher. However, in the existing organic light-emitting display panels, in order to reduce the thickness of the display panel, the distance between some display signal transmission lines and non-display signal transmission lines in the display panel is relatively close, which aggravates the interference between the display signal and the non-display signal, affecting the picture quality and non-display function of the display panel.

[0054] Among them, touch technology is being adopted more and more widely. Integrating touch panels into display panels is an important trend in the development of display panels, which enables display panels to have the advantages of being thin, flexible and having low module costs. After long-term research, the inventors found that in flexible OLED display panels, the touch electrodes are formed on the TFE (thin film encapsulation) layer, and the metal traces connecting the touch electrodes extend downward in the left and right side frames of the display panel to the signal terminals in the binding area, and then connect to the touch chip through the signal terminals to realize the touch function; and there are drive circuits on both sides of the display panel, and the drive circuits realize the drive function by connecting to the drive chip, thereby realizing the touch and drive functions of the display panel. However, the display effect and touch effect of the current display panel need to be improved.

[0055] In view of this, an embodiment of the present invention provides a display panel, comprising: a display area and a non-display area surrounding the display area; wherein the non-display area comprises:

[0056] The array substrate also extends to the display area;

[0057] A non-display signal transmission line is located on one side of the array substrate and at least on one side of the display area;

[0058] The orthographic projection of the signal shielding layer on the array substrate at least partially overlaps with the orthographic projection of the non-display signal transmission line on the array substrate.

[0059] The technical solution provided by the embodiment of the present invention can reduce the interference of the non-display signal on the non-display signal transmission line, and can also reduce the interference of the non-display signal on the display signal in the display panel by setting a signal shielding layer in the area where the non-display signal transmission line is located; the signal quality of the non-display signal and the signal quality of the display signal are guaranteed, and the working performance of the display panel is improved.

[0060] The above is the core inventive concept of the present invention. To facilitate understanding, the display panel is described in detail below with reference to the accompanying drawings.

[0061] Figure 1 is a schematic cross-sectional structure diagram of a display panel provided by an embodiment of the present invention, Figure 2 is a schematic diagram of a top view structure of a display panel provided by an embodiment of the present invention, Figure 3 yes Figure 2 Supplementary schematic diagram of the first power supply line in the structure shown, refer to Figure 1 to Figure 3 The display panel includes an array substrate 10 and a light emitting device layer 20 , a thin film encapsulation layer 30 and a touch electrode layer 40 sequentially arranged on the array substrate 10 .

[0062] Among them, the array substrate 10 refers to a film structure that can provide a driving signal for the display panel and play a role of buffering, protection or support, etc., which includes a substrate 11 and a driving circuit layer 12 arranged on the substrate 11. In the display area AA, the driving circuit layer 12 includes a plurality of pixel circuit units, a plurality of data lines (D1 to Dn), a plurality of scanning signal lines (S1 to Sm), a plurality of light-emitting control signal lines (E1 to Eo) and a plurality of first power lines ((L1 to Ln). The non-display area NAA includes a scanning driving circuit 100 and a light-emitting control circuit 200. A plurality of data lines D (D1 to Dn) are electrically connected to the driving module of the display panel, a plurality of scanning signal lines (S1 to Sm) are electrically connected to the scanning driving circuit 100, and a plurality of light-emitting control signal lines (E1 to Eo) are electrically connected to the light-emitting control circuit 200.

[0063] The light-emitting device layer 20 is located in the display area AA of the display panel. The light-emitting device layer 20 includes a plurality of light-emitting devices. The pixel circuit unit and the light-emitting device connected to the pixel circuit unit constitute a sub-pixel. The display area AA domain may include a plurality of sub-pixels Pxij, where i and j may be natural numbers. The pixel circuit unit includes a pixel circuit, and the pixel circuit is respectively connected to a scan signal line, a light-emitting control signal line, and a data line. The data line is configured to provide a data voltage to the pixel driving circuit, the scan signal line is configured to provide a scan signal to the pixel driving circuit, and the light-emitting control signal line is configured to provide a light-emitting control signal to the pixel driving circuit, thereby realizing light-emitting control of the light-emitting device. The electrical signal on the array substrate 10 can be understood as a display signal in the display panel. The scan drive circuit 100 and the touch signal transmission line Q are located on the same side of the display area AA; the signal shielding layer is located between the touch signal transmission line Q and the scan drive circuit.

[0064] The thin film encapsulation layer 30 is located on the surface of the light emitting device layer 20 away from the array substrate 10, and extends from the display area AA to the non-display area NAA, covering at least part of the array substrate 10. The thin film encapsulation method is used to ensure that the organic light emitting materials and electrodes in the light emitting device layer 20 are not corroded by water vapor and oxygen in the external environment. The touch electrode layer 40 is arranged on the side of the thin film encapsulation layer 30 away from the array substrate 10, and is located in the display area AA of the display panel. The touch signal transmission line Q is electrically connected to the touch electrode layer 40. The touch signal transmission line Q connected to the touch electrode layer 40 is connected downward to the binding area of ​​the display panel through at least one side of the display area AA, so that the touch function can be realized by connecting the binding terminal of the touch chip.

[0065] Some display signal transmission lines in the driving circuit layer 12 (such as the clock signal lines in the scanning driving circuit 100) are also connected downward to the binding area of ​​the display panel through the non-display area NAA on both sides of the display panel, resulting in intersections between the display signal transmission lines and the touch signal transmission lines Q in the driving circuit layer 12. During display and touch, parasitic capacitance is formed between the display signal transmission lines and the touch signal transmission lines Q, thereby causing interference between the touch signals and the display signals, affecting the display and touch effects.

[0066] According to the technical solution provided by an embodiment of the present invention, the non-display signal transmission line includes a touch signal transmission line; the signal shielding layer is used to shield the touch signal and the display signal in the display panel; wherein the orthographic projection of the signal shielding layer on the array substrate at least partially overlaps with the orthographic projection of the display signal transmission line on the array substrate, and the signal shielding layer is located between the touch signal transmission line and the display signal transmission line in a direction perpendicular to the array substrate; and the signal shielding layer is provided in the area where the touch signal transmission line is located, so that the interference between the touch signal and the display signal in the display panel is shielded by the signal shielding layer.

[0067] Based on the above embodiments, Figure 4 is a schematic diagram of a top view of a touch electrode layer 40 in a display panel provided by an embodiment of the present invention, with reference to Figure 4 Optionally, the non-display area NAA includes a first sub-area NAA1, a second sub-area NAA2, and a third sub-area NAA3 connecting the first sub-area NAA1 and the second sub-area NAA2; wherein the first sub-area NAA1 and the second sub-area NAA2 are located on opposite sides of the display area AA and extend along a first direction X; the third sub-area NAA3 extends along a second direction Y; the second direction Y intersects the first direction X, and the first direction X may be a column direction of sub-pixels; wherein the touch signal transmission line Q is located in the first sub-area NAA1 and the second sub-area NAA2; the signal shielding layer is located in the first sub-area NAA1, the second sub-area NAA2, and the third sub-area NAA3. The binding area is located in the third sub-area NAA3.

[0068] Specifically, the touch electrode layer 40 may include receiving electrodes TX continuously arranged along the second direction Y and transmitting electrodes RX arranged along the first direction X, and the transmitting electrodes RX are connected by a conductive bridge of another layer. In order to realize the touch function of the touch electrode layer 40, a metal trace is set to connect the receiving electrode TX and a metal trace is set to connect the transmitting electrode RX. The metal trace connecting the touch electrodes is the touch signal transmission line. Among them, the touch signal transmission line QT electrically connected to the receiving electrode TX is connected downward to the binding area of ​​the display panel through the two sides of the display area AA (the first sub-area NAA1 and the second sub-area NAA2), and the touch signal transmission line QR electrically connected to the transmitting electrode RX is connected downward to the binding area of ​​the display panel through the third sub-area NAAS of the display area AA, so that the touch function can be realized by connecting the binding terminal of the touch chip. The touch signal transmission line QT is set to be connected downward to the binding area of ​​the display device through both sides of the display area AA. Compared with connecting the touch signal transmission line QT downward to the binding area of ​​the display panel through one side of the display area AA, the difficulty of arranging the touch signal transmission line QT electrically connected to the receiving electrode TX can be reduced, and it is conducive to the realization of a narrow frame of the display panel. The signal shielding layer is located in the first sub-area NAA1, the second sub-area NAA2 and the third sub-area NAA3. The signal shielding layer located in the first sub-area NAA1 and the second sub-area NAA2 is between the touch signal transmission line and the scan driving circuit in a direction perpendicular to the array substrate, so that the signal shielding layer can shield the touch signal transmission line QT located in the first sub-area NAA1 and the second sub-area NAA2, and can also connect the signal shielding layer located in the first sub-area NAA1 and the second sub-area NAA2 through the signal shielding layer located in the third sub-area NAA3, so as to facilitate the input of electrical signals to the signal shielding layer.

[0069] Specifically, the polarity of an electrical signal can be understood as the positive or negative of the electrical signal relative to a reference voltage (zero potential). If the difference between the voltage value of an electrical signal and the reference voltage is positive, the polarity of the electrical signal is positive; if the difference between the voltage value of an electrical signal and the reference voltage is negative, the polarity of the electrical signal is negative. For example, the reference voltage is a ground voltage.

[0070] Optionally, setting the polarity of the electrical signal on the signal shielding layer to be the same as that of the electrical signal on the non-display signal transmission line can reduce the amount of noise between the electrical signal on the signal shielding layer and the electrical signal on the non-display signal transmission line, improve the shielding effect of the signal shielding layer, further ensure the signal quality of the non-display signal and the signal quality of the display signal, and improve the operating performance of the display panel.

[0071] Specifically, the electric signal on the touch signal transmission line connected to the touch electrode is a positive signal that jumps between high and low. Relative to the electric signal on the signal shielding layer which is a negative direct current, the electric signal on the signal shielding layer is set to a positive direct current, so that the polarity of the electric signal on the signal shielding layer is the same as the polarity of the electric signal on the touch signal transmission line. This can reduce the amount of noise between the electric signal on the signal shielding layer and the electric signal on the touch signal transmission line, improve the shielding effect of the signal shielding layer, further ensure the signal quality of the touch signal transmission line, improve the sensitivity of the touch sensor, and improve the working performance of the display panel.

[0072] Based on the above embodiments, Figure 5 FIG. 1 is a schematic diagram showing the positions of the first power transmission line and the second power transmission line in the non-display area NAA in a display panel provided by an embodiment of the present invention, with reference to FIG. Figure 5 , Optionally, the signal shielding layer includes a first power transmission line 121, and the first power transmission line 121 is used to provide a first power signal to the sub-pixel;

[0073] The polarity of the first power signal is the same as the polarity of the touch signal on the touch signal transmission line.

[0074] Specifically, the light-emitting device layer 20 includes a plurality of light-emitting devices. The light-emitting device generally includes an anode, a light-emitting layer, and a cathode. The anode of the sub-pixel is the anode of the light-emitting device. The first power transmission line 121 is used to provide a first power signal ELVDD to the anode of the light-emitting device. The polarity of the first power signal ELVDD is positive, which is the same as the polarity of the touch signal on the touch signal transmission line QT. Therefore, the signal shielding layer can be reused as the first power transmission line 121, thereby reducing the number of wirings in the display panel and reducing the difficulty of manufacturing the display panel.

[0075] Furthermore, the display panel further includes:

[0076] Auxiliary cathode 123, located in display area AA; the auxiliary cathode 123 is electrically connected to the cathode of the sub-pixel;

[0077] The second power transmission line 122 is located in the non-display area NAA and is located on a different side of the display area AA from the touch signal transmission line QT. The second power transmission line 122 is electrically connected to the auxiliary cathode 123 to provide a second power signal to the cathode of the sub-image.

[0078] Specifically, the display area AA includes an auxiliary cathode 123, which is connected in parallel with the cathode of the sub-pixel to reduce the voltage drop of the second power signal ELVSS in the display area AA. The second power transmission line 122 is electrically connected to the auxiliary cathode 123, and is used to provide the second power signal ELVSS to the cathode of the sub-pixel through the auxiliary cathode 123. The polarity of the second power signal ELVSS is opposite to the polarity of the touch signal on the touch signal transmission line QT, and the second power transmission line 122 is located in the third sub-area NAA3.

[0079] In the embodiment of the present invention, the first power transmission line 121 is arranged in the first sub-area NAA1 and the second sub-area NAA2, and the second power transmission line 122 (i.e., the cathode common electrode layer) is arranged in the third sub-area NAA3. The ELVSS signal of the display area AA is input from the lower frame, and the ELVDD signal is input from the two sides of the lower frame to the left and right frames. The frames on the opposite sides of the display panel use ELVDD signal routing to shield the crosstalk between the touch signal and the display signal of the display panel. The polarity of the electrical signal on the ELVDD signal routing is the same as the polarity of the electrical signal on the touch signal transmission line QT, which can reduce the amount of noise between the electrical signal on the touch signal transmission line QT, improve the shielding effect of the signal shielding layer, further ensure the signal quality of the touch signal transmission line, and improve the sensitivity of the touch sensor. In addition, the influence of the touch signal on the ELVDD signal is also small, which can also ensure the quality of the ELVDD signal of the input sub-image and improve the display effect of the display panel.

[0080] Based on the above embodiments, optionally, the display area AA further includes:

[0081] A plurality of first power lines extending along the first direction X and arranged at intervals along the second direction Y ( Figure 3 The first power line L1 to the first power line LN);

[0082] a plurality of first power auxiliary lines (not shown) extending along the second direction Y and arranged at intervals along the first direction X;

[0083] The first power auxiliary line is used to conduct the first power line and the first power transmission line 121 .

[0084] Specifically, the first power line can extend along the column direction of the sub-pixels, and the sub-pixels in each column are electrically connected to a corresponding first power line. The first power auxiliary line can extend along the row direction of the sub-pixels, and the first end of the first power auxiliary line is electrically connected to the first power transmission line 121 located in the first sub-area NAA1, and the second end of the first power auxiliary line is electrically connected to the first power transmission line 121 located in the second sub-area NAA2, thereby reducing the difference in the first power signal at different positions on the first power auxiliary line.

[0085] The first power auxiliary line is used to conduct the first power line and the first power transmission line 121, so as to transmit the first power signal ELVDD on the first power transmission line 121 located in the non-display area NAA to the first power line located in the display area AA, and then provide it to the sub-pixel. The electrical connection portion where the first power auxiliary line is connected to the first power line is located in the overlapping area of ​​the first power auxiliary line and the first power line. The first power line and the first power auxiliary line are located in the same metal layer, or in different metal layers. When the first power line and the first power auxiliary line are located in different metal layers, the first power line will be close to the light-emitting device, and the first power line and the first power auxiliary line are electrically connected through a connecting hole. In addition, the provision of the first power auxiliary line can also reduce the voltage difference of the first power signal ELVDD at different positions in the display area AA.

[0086] Based on the above embodiments, please continue to refer to Figure 5 Optionally, the auxiliary cathode 123 is in a grid shape, and the auxiliary cathode 123 includes:

[0087] A plurality of first auxiliary cathode strips extending along the first direction X and arranged at intervals along the second direction Y;

[0088] A plurality of second auxiliary cathode strips extending along the second direction Y and arranged at intervals along the first direction X;

[0089] The first auxiliary cathode strips extend to the non-display area NAA and are electrically connected to the second power transmission line 122 .

[0090] Specifically, Figure 6 is a schematic cross-sectional view of another display panel provided by an embodiment of the present invention, referring to Figure 6, the light emitting device layer 20 further includes a pixel definition layer PDL, the pixel definition layer PDL includes an opening exposing the anode 21 to define the emission area of ​​each sub-pixel. The pixel definition layer PDL can be formed of an organic material such as polyimide (PI), polyamide, benzocyclobutene (BCB), acrylic resin or phenolic resin. The light emitting layer 22 is located on the anode 21, and the light emitting layer 22 can be formed of a low molecular weight organic material or a high molecular weight organic material. The light emitting layer includes an organic emission layer 222, and can also include a first functional layer 221 located between the organic emission layer 222 and the anode 21 and a second functional layer 221 located between the organic emission layer 222 and the cathode 23. The first functional layer 221 may include at least one of a hole injection layer (HIL) and a hole transport layer (HTL), and the second functional layer 221 may include at least one of an electron transport layer (ETL) and an electron injection layer (EIL). The cathode 23 is located on the light emitting layer 22, and the cathode 23 may be a common cathode of the entire layer, or may be a block corresponding to the anode 21. The auxiliary cathode 123 is located on a side of the pixel defining layer PDL close to the substrate 11 , and the auxiliary cathode 123 may be electrically connected to the cathode 23 through a connection hole penetrating the pixel defining layer PDL.

[0091] Based on the above embodiments, optionally, the array substrate 10 includes a substrate 11 and a driving circuit layer 12 located on the substrate 11; wherein the driving circuit layer 12 includes multiple metal layers. The number of metal layers included in the driving circuit layer 12 and the positions of each wiring can be set according to actual needs, and the present invention does not limit this.

[0092] For example, in one embodiment of the present invention, the driving circuit layer 12 may include four metal layers, namely, a first metal layer M1, a second metal layer M2, a third metal layer M3 and a fourth metal layer M4 which are sequentially away from the substrate 11. Figure 6 , Figure 6 The first metal layer M1, the second metal layer M2 and the fourth metal layer M4 are shown by way of example. The gate of the transistor T is located in the first metal layer M1, the source and the drain of the transistor T are located in the second metal layer M2, and the active layer PSI is located between the substrate 11 and the gate. In the display area AA, the auxiliary cathode may be located in the fourth metal layer M4; the first power line may be located on the same side as the data line, located in the third metal layer M3; the first power adapter line may be located in the second metal layer M2. In the first sub-area NAA1 and the second sub-area NAA2 of the non-display area NAA, the first power transmission line 121 is located in the fourth metal layer M4, and the clock signal line of the GIP circuit is located in the third metal layer M3; the first power transmission line 121 of the third sub-area NAA3 is located in the fourth metal layer M4, and the second power transmission line 122 is located in the third metal layer M3 and / or the fourth metal layer M4.

[0093] In another embodiment of the present invention, the driving circuit layer 12 may include five metal layers, namely, a first metal layer M1, a second metal layer M2, a third metal layer M3, a fourth metal layer M4 and a fifth metal layer M5, which are sequentially away from the substrate 11. An interlayer insulating layer is provided between adjacent metal layers. In the display area AA, the auxiliary cathode 123 may be located in the fifth metal layer M5, the first power line may be located in the fourth metal layer M4, and the first power adapter line may be located in the fourth metal layer M4. In the first sub-area NAA1 and the second sub-area NAA2 of the non-display area NAA, the first power transmission line 121 is located in at least one of the fourth metal layer M4 and the fifth metal layer M5, and the clock signal line of the GIP circuit is located in the third metal layer M3; the first power transmission line 121 in the third sub-area NAA3 is located in at least one of the third metal layer M3, the fourth metal layer M4 and the fifth metal layer M5; the second power transmission line 122 is located in at least one of the third metal layer M3, the fourth metal layer M4 and the fifth metal layer M5. When the signal line is prepared using at least two metal layers, the resistance of the signal line can be reduced, thereby reducing the voltage drop on the signal line.

[0094] On the basis of the above embodiments, the signal shielding layer is located inside the array substrate 10 , and / or the signal shielding layer is located on the surface of the array substrate 10 close to the thin film encapsulation layer 30 .

[0095] Based on the above embodiments, the signal shielding layer is in a grid shape. The signal shielding layer is arranged in a grid shape so that the signal shielding layer can have multiple openings. The gas in the display panel can be discharged outward through the openings to prevent bubbles generated in the display panel from causing bubbling of the signal shielding layer, thereby reducing the risk of cracking of the display panel frame.

[0096] refer to Figure 7 An embodiment of the present invention further provides a display device, including the display panel 1 described in any embodiment of the present invention, which has the same technical effect and will not be repeated here.

[0097] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that: include: a display area and a non-display area surrounding the display area; The non-display area includes: The array substrate also extends to the display area; A non-display signal transmission line, located on one side of the array substrate and located on at least one side of the display area; The signal shielding layer has an orthographic projection on the array substrate that at least partially overlaps with an orthographic projection of the non-display signal transmission line on the array substrate.

2. The display panel according to claim 1, characterized in that: The polarity of the electrical signal on the signal shielding layer is the same as the polarity of the electrical signal on the non-display signal transmission line; Preferably, the non-display signal transmission line includes a touch signal transmission line; The signal shielding layer is used to shield the touch signal and the display signal in the display panel; wherein the orthographic projection of the signal shielding layer on the array substrate at least partially overlaps with the orthographic projection of the display signal transmission line on the array substrate, and the signal shielding layer is located between the touch signal transmission line and the display signal transmission line in a direction perpendicular to the array substrate; Preferably, the display area includes sub-pixels arranged in an array; the non-display area includes a first sub-area, a second sub-area, and a third sub-area connecting the first sub-area and the second sub-area; wherein the first sub-area and the second sub-area are located on opposite sides of the display area and extend along a first direction; the third sub-area extends along a second direction; and the second direction intersects the first direction; Wherein, the touch signal transmission line is located in the first sub-area and the second sub-area; the signal shielding layer is located in the first sub-area, the second sub-area and the third sub-area; Preferably, the non-display area further includes: A scan driving circuit; the scan driving circuit and the touch signal transmission line are located on the same side of the display area; wherein the signal shielding layer located in the first sub-area and the second sub-area is located between the touch signal transmission line and the scan driving circuit in a direction perpendicular to the array substrate, and the display signal includes a clock signal in the scan driving circuit.

3. The display panel according to claim 2, characterized in that: The signal shielding layer includes a first power transmission line, and the first power transmission line is used to provide a first power signal to the sub-pixel; The polarity of the first power signal is the same as the polarity of the touch signal on the touch signal transmission line.

4. The display panel according to claim 2, characterized in that: Also includes: An auxiliary cathode, located in the display area; the auxiliary cathode is electrically connected to the cathode of the sub-pixel; a second power transmission line, located in the non-display area and located on a different side of the display area from the touch signal transmission line; the second power transmission line is electrically connected to the auxiliary cathode and is used to provide a second power signal to the cathode of the sub-pixel; Preferably, the polarity of the second power signal is opposite to the polarity of the touch signal on the touch signal transmission line; Preferably, the second power transmission line is located in the third sub-area.

5. The display panel according to claim 3, characterized in that: The display area also includes: a plurality of first power lines extending along the first direction and arranged at intervals along the second direction; a plurality of first power auxiliary lines extending along the second direction and arranged at intervals along the first direction; Wherein, the first power auxiliary line is used to conduct the first power line and the first power transmission line.

6. The display panel according to claim 5, characterized in that: The first end of the first power auxiliary line is electrically connected to the first power transmission line located in the first sub-area; the second end of the first power auxiliary line is electrically connected to the first power transmission line located in the second sub-area; Wherein, the electrical connection portion where the first power auxiliary line is connected to the first power line is located in an overlapping area between the first power auxiliary line and the first power line; Preferably, the first power line and the first power auxiliary line are located in the same metal layer, or in different metal layers.

7. The display panel according to claim 4, characterized in that: The auxiliary cathode comprises a grid shape, and the auxiliary cathode comprises: a plurality of first auxiliary cathode strips extending along the first direction and arranged at intervals along the second direction; a plurality of second auxiliary cathode strips extending along the second direction and arranged at intervals along the first direction; Wherein, the first auxiliary cathode strip extends to the non-display area and is electrically connected to the second power transmission line.

8. The display panel according to claim 2, characterized in that: Also includes: A light emitting device layer, located on one side of the array substrate and located in the display area; A thin film encapsulation layer is located on a side of the light emitting device layer away from the array substrate and extends from the display area to the non-display area, covering at least a portion of the array substrate; A touch electrode layer, located on a side of the thin film encapsulation layer away from the array substrate and located in the display area; Among them, the signal shielding layer is located inside the array substrate and / or on the surface of the array substrate close to the thin film encapsulation layer; the touch signal transmission line is located on the side of the thin film encapsulation layer away from the array substrate; the touch signal transmission line is electrically connected to the touch electrode layer.

9. The display panel according to claim 1, characterized in that: The signal shielding layer includes a grid shape.

10. A display device, characterized in that: The invention comprises the display panel according to any one of claims 1 to 9.

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