Display panel and display device

Abstract

A display panel and a display device, wherein the display panel includes a display area and a non-display area adjacent to the display area, and includes a base, a plurality of light-emitting elements including a first electrode, a light-emitting functional layer, and a second electrode provided by laminating on the base, a separation layer including a plurality of separation openings and having the light-emitting functional layer located in the corresponding separation openings, a bank provided in the non-display area and located on the same side of the separation layer and the base, and having a projection on the base surrounding the display area, and a power supply wiring electrically connected to the second electrode. The non-display area includes a first frame area, the first frame area includes a first side circuit area between the bank and the display area, and the power supply wiring is provided in at least a part of the area excluding the first side circuit area of the non-display area.

Description

Technical Field

[0001] This application claims the priority of a Chinese patent application with the application number 202310771124.9, which was filed with the Chinese Patent Office on June 26, 2023, and all the contents of the application are incorporated herein by reference.

[0002] Embodiments of this application relate to the field of display technology, for example, to a display panel and a display device.

Background Art

[0003] With the development of display technology, narrow borders have already become a development trend.

[0004] In related technologies, a border circuit and multiple types of signal lines are provided within the border of the display panel. Among them, the border circuit includes a gate driving circuit, and the signal lines include a cathode power signal line, a clock signal line, etc., and the cathode power signal line is provided surrounding the display area.

[0005] However, conventional display panels are difficult to achieve narrow borders and have a small screen occupation ratio.

Summary of the Invention

Problems to be Solved by the Invention

[0006] This application provides a display panel and a display device for reducing at least a part of the border width of the display panel and improving the screen occupation ratio.

Means for Solving the Problems

[0007] On the first side, the embodiment of the present application provides a display panel including a display area and a non-display area adjacent to the display area. The display panel includes a base, a plurality of light-emitting elements including a first electrode, a light-emitting functional layer, and a second electrode laminated on the base, a separation layer including a plurality of separation openings and having the light-emitting functional layer located in the corresponding separation openings, a bank provided in the non-display area, located on the same side of the separation layer and the base, and having a projection on the base surrounding the display area, and a power supply wiring electrically connected to the second electrode. The non-display area includes a first frame area including a first side circuit area between the bank and the display area, and the power supply wiring is provided in at least a part of the area of the non-display area excluding the first side circuit area.

[0008] On the second side, the embodiment of the present application further provides a display device including the display panel on the first side.

Advantages of the Invention

[0009] The display panel and the display device of the embodiment of the present application provide a separation layer including a plurality of separation openings in the display area and having the light-emitting functional layer located in the separation openings, so that the separation layer blocks the light-emitting functional layers of adjacent light-emitting elements and ensures that crosstalk does not occur between the light-emitting elements. The power supply wiring is provided in at least a part of the area of the non-display area excluding the first side circuit area, that is, the power supply wiring may not be provided in the first side circuit area. Therefore, the distance between the bank and the display area does not include the border width occupied by the power supply wiring, and compared with the display panel in the related art, the distance between the bank and the display area can be reduced, and the width of the first frame area can be reduced, which is beneficial to realizing a narrow border and improving the screen occupation ratio.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

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Modes for Carrying Out the Invention

[0011] Conventional display panels are difficult to achieve narrow borders and have a small screen occupancy rate. According to the inventor's research, it has been found that the above problems are caused by the following. Conventional display panels include a plurality of light-emitting elements including an anode, a light-emitting layer, and a cathode provided in a stacked manner. Among them, the cathodes of the plurality of light-emitting elements are connected to each other to form a cathode layer, and the cathode layer has a full-surface structure. When making a display panel, after the light-emitting layer is formed, the cathode layer is laid on the entire surface on one side of the light-emitting layer. In a conventional display panel, in order to ensure the display effect of the display panel, the cathode needs to be transparent, so the thickness of the cathode layer is thin, generally about 100 angstroms. As a result, the sheet resistance of the cathode layer becomes large, and correspondingly, when the cathode voltage is transmitted through the cathode layer, the voltage drop is large. In order to alleviate the voltage drop of the cathode voltage, usually, in the non-display area, a cathode power supply wiring surrounding the display area is provided, and the cathode power supply wiring can be connected to the cathode layer at a plurality of positions around the display area. Exemplarily, for a rectangular display panel, at the upper, lower, left, and right borders of the display panel, the cathode power supply wiring is all connected to the cathode layer. FIG. 1 is a schematic structural diagram of the border on one side of a display panel in the related art. The border width of the display panel is equal to the sum of the distance between the bank and the display area (the first distance c in FIG. 1), the border width occupied by the bank (the second distance b in FIG. 1), and the distance between the bank and the edge of the display panel (the third distance c in FIG. 1). The distance between the bank and the display area (the first distance c in FIG. 1) includes the border width occupied by the cathode power supply wiring (the first width c1 in FIG. 1) and the border width occupied by the border circuit (the second width c2 in FIG. 1), among which the border short circuit may include a gate drive circuit. Therefore, if the cathode power supply wiring is provided as described above, the cathode power supply wiring needs to occupy a plurality of borders of the display panel, which is disadvantageous for realizing narrow borders.

[0012] Embodiments of the present application provide a display panel. FIG. 2 is a plan view of the display panel according to an embodiment of the present application, FIG. 3 is a cross-sectional view of the display panel according to an embodiment of the present application, and FIG. 4 is a cross-sectional view of another display panel according to an embodiment of the present application. FIG. 3 is obtained by cutting along the cutting line BB' corresponding to FIG. 2, and FIG. 4 is obtained by cutting along the cutting line CC' corresponding to FIG. 2. Referring to FIGS. 2 to 4, the display panel includes a display area AA and a non-display area NAA adjacent to the display area AA. The display panel includes a base 100, a plurality of light-emitting elements 300 including a first electrode 310, a light-emitting functional layer 320, and a second electrode 330 laminated on the base 100, a plurality of isolation openings 201, an isolation layer 20 for blocking the light-emitting functional layers 320 of adjacent light-emitting elements 300 with the light-emitting functional layer 320 located within the isolation openings 201, a thin-film encapsulation layer 500 covering at least the plurality of light-emitting elements 300 and including at least an organic encapsulation layer 510, a bank 600 provided in the non-display area NAA, located on the same side of the isolation layer 20 and the base 100, and having a projection on the base surrounding the display area AA and blocking the organic encapsulation layer 510, and a power supply wiring 700 electrically connected to the second electrode 330. The non-display area NAA includes a first border area NAA1, and the first border area NAA1 includes a first side circuit area NAA11 between the bank 600 and the display area AA. The power supply wiring 700 is provided in at least a part of the area of the non-display area NAA excluding the first side circuit area NAA11 of the non-display area NAA (that is, the power supply wiring 700 is provided in the non-display area NAA and is not provided in the first side circuit area NAA11).

[0013] The base 100 can provide functions such as buffering, protecting, or supporting for the display device. The base 100 may be a flexible base. The material of the flexible base 100 may be Polyimide (PI), Polyethylene Naphthalate (PEN), Polyethylene Terephthalate (PET), etc., or a mixed material of the above multiple materials. The base 100 may also be a rigid base formed of a material such as glass.

[0014] In some preferred embodiments of the present application, the isolation layer 20 further includes a pixel defining layer 200 and an isolation structure 400. The pixel defining layer 200 is provided on one side of the base 100 of the display panel, and the isolation structure 400 is provided on the side away from the base 100 of the pixel defining layer 200. The isolation structure 400 surrounds and closes to form a first opening 401, the pixel defining layer 200 surrounds and closes to form a second opening 210, the orthographic projection of the second opening 210 on the base 100 is within the orthographic projection of the first opening 401 on the base 100, the isolation opening 201 includes the first opening 401 and the second opening 210, and at least a part of the light-emitting functional layer 320 is located within the second opening 210.

[0015] The fact that the orthographic projection of the second opening 210 on the base 100 is within the orthographic projection of the first opening 401 on the base 100 includes the case where the orthographic projection of the second opening 210 on the base 100 completely overlaps with the orthographic projection of the first opening 401 on the base 100, and further includes the case where the orthographic projection of the second opening 210 on the base 100 and the orthographic projection of the first opening 401 on the base 100 partially overlap, and the orthographic projection of the second opening 210 on the base 100 is completely within the orthographic projection of the first opening 401 on the base 100.

[0016] The pixel defining layer 200 includes a plurality of second openings 210, and the light-emitting functional layer 320 of one light-emitting element 300 is provided in each second opening 210. The pixel defining layer 200 may employ an organic material such as an acrylic acid organic compound, polyamide, or polyimide, or may employ an inorganic material such as silicon oxide, silicon nitride, silicon oxynitride, or aluminum oxide. The embodiments of the present application are not limited here.

[0017] The light-emitting element 300 includes a first electrode 310, a light-emitting functional layer 320, and a second electrode 330, which are laminated on the base 100. Preferably, the first electrode 310 is the anode of the light-emitting element 300, and the second electrode 330 is the cathode of the light-emitting element 300. The anode may adopt a three-layer structure, among which the first layer and the third layer may be metal oxide layers, such as Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), Aluminum Zinc Oxide (AZO), and the middle second layer may be a metal layer (such as silver or copper). The first electrode 310 is connected to the pixel circuit and further receives a driving signal from the pixel circuit. The cathode may be an ITO transparent electrode or a magnesium-silver alloy. The light-emitting functional layer 320 may include only a single-layer film layer, that is, only a light-emitting material layer, or may include a multilayer structure formed by a hole injection layer, a hole transport layer, a light-emitting material layer, an electron transport layer, an electron injection layer, etc., which are laminated from one side of the base 110. And the light-emitting functional layer 320 includes at least a red light-emitting layer, a green light-emitting layer, and a blue light-emitting layer, whereby displays of multiple colors can be realized.

[0018] The isolation structure 400 is located in the display area AA, and the light-emitting functional layer 320 of the light-emitting element 300 is blocked by the isolation structure 400, thereby avoiding the occurrence of cross-color in different light-emitting elements 300. The isolation structure 400 has a certain thickness, and the thickness of the isolation structure 400 is greater than the thickness of the cathode. Exemplarily, during the manufacture of the display panel, after the isolation structure 400 is manufactured, the light-emitting layer is deposited using the isolation structure 400 as a mask. Further, the light-emitting functional layers 320 of adjacent light-emitting elements 300 are separated by the isolation structure 400, enabling the light-emitting functional layer 320 not to contact the isolation structure 400, and avoiding the occurrence of cross-color when the emission colors of adjacent light-emitting elements 300 are different. And it is possible to save the use of a precise mask plate for depositing the light-emitting functional layer 320 in the related art. When manufacturing the cathode on the light-emitting functional layer 320, for example, when using a general-purpose mask plate to deposit the cathode, due to the presence of the isolation structure 400, the cathode is blocked by a plurality of independent cathodes corresponding one-to-one to the light-emitting elements 300. Among them, the manufacturing process of the cathode is not limited to the deposition process as described above, and a sputtering process or other processes may be adopted, and the present embodiment does not limit here. In addition, when both the light-emitting functional layer 320 and the cathode 330 are manufactured by adopting a deposition process, by adjusting the difference in the deposition angle, it is possible to realize that the light-emitting functional layer 320 does not contact the isolation structure 400 and the cathode 300 contacts the isolation structure 400 to realize the overlapping connection of the two.

[0019] Continuing to refer to FIGS. 3 and 4, the display panel further includes a thin-film encapsulation layer 500. Preferably, the thin-film encapsulation layer 500 includes a first inorganic encapsulation layer 520, an organic encapsulation layer 510, and a second inorganic encapsulation layer 530 provided in a stacked manner, thereby ensuring a suitable encapsulation effect. The thin-film encapsulation layer 500 covers at least a plurality of light-emitting elements 300, and the thin-film encapsulation layer 500 may further cover at least a part of the circuit structure and signal lines in the non-display area NAA, thereby encapsulating the light-emitting elements 300 and the circuit structure in the display panel, avoiding the light-emitting elements 300 and the circuit elements from being eroded by water, oxygen, etc., and further ensuring that the display panel has a long service life.

[0020] The material of the organic encapsulation layer 510 is an organic material, and the organic material has fluidity. To block the organic encapsulation layer 510, the display panel further includes a bank 600 provided in the non-display area NAA. The projection of the bank 600 on the base surrounds the display area AA and is used to block the organic encapsulation layer 510. The bank 600 and the pixel defining layer 200 are located on the same side of the base 100. Preferably, at least a part of the portion of the pixel defining layer 200 in the non-display area NAA may have the structure of the bank 600.

[0021] Referring to FIG. 4, the display panel further includes an isolation structure 400 and a power supply line 700 electrically connected to the second electrode 330. Among them, the power supply line 700 may be connected to the second electrode 330 via the isolation structure 400, or may be connected to the isolation structure 400 via the second electrode 330. The power supply line 700 is connected to a power supply that outputs the voltage required for the second electrode 330, so that the voltage output by the power supply can be transmitted to the second electrode 330. Referring to FIGS. 2 to 4, in this embodiment, the non-display area NAA includes a first border area NAA1. The first border area NAA1 includes a first side circuit area NAA11 between the bank 600 and the display area AA. The power supply line 700 is provided in the non-display area NAA and is provided in at least a part of the area other than the first side circuit area NAA11. The display panel may include a plurality of border areas. The plurality of border areas may include at least one first border area NAA1, and the plurality of border areas may further include other border areas other than the first border area NAA1. Among them, FIGS. 2 and 4 schematically show a case where the display panel further includes a second border area NAA2 and the power supply line 700 is located in the second border area NAA2 of the display panel. Among them, the second border area NAA2 is a border area different from the first border area NAA1 in the display panel. In some preferred embodiments, there is a partial overlap between the first border area NAA1 and the second border area NAA2. For example, both the first border area NAA1 and the second border area NAA2 include the lower left corner area and the lower right corner area of the display panel. In such a case, there is a partial overlap between the first border area NAA1 and the second border area NAA2. In another some preferred embodiments, there is no overlap between the first border area NAA1 and the second border area NAA2. For example, one of the first border area NAA1 and the second border area NAA2 includes the lower left corner area and the lower right corner area of the display panel, and the other does not include the lower left corner area and the lower right corner area of the display panel. In such a case, there is no overlap between the first border area NAA1 and the second border area NAA2. However, regardless of whether there is an overlap between the first border area NAA1 and the second border area NAA2, the first border area NAA1 and the second border area NAA2 are different border areas.

[0022] Continuing to refer to FIG. 3, preferably, a gate driving circuit 800 is provided in the first side circuit area NAA11. The gate driving circuit 800 includes a scanning circuit for generating a scanning signal and / or a light emission control circuit for generating a light emission control signal.

[0023] The output terminal of the scanning circuit is connected to the scanning line S0, and the scanning circuit can output a scanning signal to the scanning line S0. The display panel may further include a light emission control signal line. The output terminal of the light emission control circuit is connected to the light emission control signal line, and the light emission control circuit can output a light emission control signal to the light emission control signal line. The display panel includes a pixel circuit for driving the light emitting element 300 to emit light. The pixel circuits are respectively connected to the scanning line S0 and the light emission control signal line, and drive the light emitting element 300 based on the scanning signal transmitted on the scanning line S0 and the light emission control signal transmitted on the light emission control signal line.

[0024] In the corresponding display panel of the first frame area NAA1 shown in FIG. 3, the frame width w1 is equal to the sum of the distance between the bank 600 and the display area AA (the first distance c in FIG. 3), the frame width occupied by the bank 600 (the second distance b in FIG. 3), and the distance between the bank 600 and the edge of the display panel (the third distance a in FIG. 3). In connection with FIGS. 3 and 4, in this embodiment, the power wiring 700 is provided in at least a part of the non-display area NAA other than the first side circuit area NAA11, that is, the power wiring 700 is not provided in the first side circuit area NAA11. Therefore, the distance between the bank 600 and the display area AA (the first distance c in FIG. 3) does not include the frame width occupied by the power wiring 700. When the gate drive circuit 800 is provided in the first side circuit area NAA11, the first side circuit area NAA1 does not include the frame width occupied by the power wiring 700 and includes the frame width occupied by the gate drive circuit 800. Compared with the display panel in which the distance between the bank 600 and the display area AA shown in FIG. 1 (the first distance c in FIG. 1) includes the frame width occupied by the cathode power wiring (the first width c1 in FIG. 1) and the frame width occupied by the frame circuit (which may be a gate drive circuit) (the first width c2 in FIG. 1), the distance between the bank 600 and the display area AA is reduced, and the width of the first frame area NAA1 is reduced, which is advantageous for realizing a narrow frame.

[0025] In this embodiment, since the isolation structure 400 is provided in the display area AA, preferably, the isolation structure 400 is overlapped and connected to the second electrodes 330 of at least some of the light-emitting elements 300 in the display panel. The second electrodes 330 of the plurality of light-emitting elements 300 in the display panel can be connected to each other through the isolation structure 400. The display panel may further include a conductive connection layer different from the layer where the isolation structure 400 is located. The conductive connection layer connects the second electrodes 330 of the plurality of light-emitting elements 300. A material having a lower resistivity with respect to the second electrode 330 is selected and used as the material of the isolation structure 400 (or the conductive connection layer), and / or the thickness of the isolation structure 400 (or the conductive connection layer) is increased. Thereby, the resistance of the overall structure connected by the second electrode 330 and the isolation structure 400 (or the conductive connection layer) is made smaller than the resistance of the full-surface cathode layer in the related art, and the voltage drop during the transmission of the required voltage of the second electrode 330 in the display area AA can be reduced. In this embodiment, in the non-display area NAA, the installation of the power supply wiring 700 may be reduced, and in the side circuit area of the first frame area NAA1, the power supply wiring 700 may not be provided, which is advantageous for realizing a narrow frame.

[0026] The display panel of this embodiment includes a plurality of isolation openings in the display area, and by providing an isolation layer where the light-emitting functional layer is located within the isolation openings, the isolation layer blocks the light-emitting functional layers of adjacent light-emitting elements, ensuring that crosstalk does not occur between the light-emitting elements. The power supply wiring is provided in at least some regions of the non-display area other than the first side circuit area, that is, the power supply wiring may not be provided in the first side circuit area. Therefore, the distance between the bank and the display area does not include the width of the frame occupied by the power supply wiring. Compared with the display panel in the related art, the distance between the bank and the display area can be reduced, and the width of the first frame area can be reduced, which is advantageous for realizing a narrow frame and improving the screen occupation ratio.

[0027] Continuing to refer to FIGS. 2 to 4, based on the above technical solution, the display panel further includes a scanning line S0 and a data line D0. The scanning line S0 extends along a first direction x1, the data line D0 extends along a second direction y1, the first direction x1 intersects with the second direction y1, the non-display area NAA includes two first margin areas NAA1 facing each other along the first direction x1, the non-display area NAA further includes a second margin area NAA2 located on one side of the display area AA along the second direction y1, and at least a part of the power supply line 700 is provided in the second margin area NAA2.

[0028] When the display panel is the rectangular display panel shown in FIG. 2, the two first margin areas NAA1 of the display panel are respectively the left margin and the right margin of the display panel, and the second margin area NAA2 of the display panel is the lower margin of the display panel. The non-display area NAA further includes a third margin area NAA3 facing the second margin area NAA2 along the second direction y1, and the third margin area NAA3 of the display panel is the upper margin of the display panel. In this embodiment, no power supply line 700 is provided in the first side circuit areas NAA11 of the two first margin areas NAA1 facing each other along the first direction x1 of the display panel. Thereby, the widths of the two first margin areas NAA1 facing each other along the first direction x1 are both narrowed, which is advantageous for realizing a narrow margin, and enables the widths of the two first margin areas NAA1 to be more easily substantially the same, guaranteeing the aesthetics of the display panel and improving the user's visual experience.

[0029] Preferably, the second margin area NAA2 includes a second side circuit area NAA21 between the bank 600 and the display area AA, at least a part of the power supply line 700 is provided in the second side circuit area NAA21, and a driving chip (not shown) for providing a data signal is provided in the second margin area NAA2.

[0030] In the second border area NAA2, since a driving chip needs to be provided for itself to output a data signal to the data line D0, the second border area NAA2 itself has a certain width. The voltage required for the second electrode 330 can be provided by the driving chip. In such a case, by providing the power supply wiring 700 in the second side circuit area NAA21, the voltage required for the second electrode 330 output by the driving chip can be easily drawn out to the isolation structure 400 and the second electrode 330 in the display area AA, and it is not necessary to provide the power supply wiring 700 to be too long, which is more advantageous for realizing a narrow border. The voltage required for the second electrode 330 can also be provided by an additional power supply. The additional power supply is usually provided in the same border area as the driving chip (i.e., the second border area NAA2), or is bent to the backlight side of the display panel. In such a case, when the power supply wiring 700 is provided in the second side circuit area NAA21, similarly, the voltage required for the second electrode 330 output by the driving chip can be easily drawn out to the isolation structure 400 and the second electrode 330 in the display area AA, and it is not necessary to provide the power supply wiring 700 to be too long, which is more advantageous for realizing a narrow border.

[0031] Note that in some preferred embodiments of the present application, all of the power supply wirings 700 may be provided in the second border area NAA2, thereby making it possible to reduce the widths of other border areas other than the second border area NAA2, and enabling the display panel to achieve a narrow border.

[0032] In another part of the preferred embodiments of the present application, part of the power supply wiring may be provided in the second border area NAA2 and part may be provided in other border areas.

[0033] FIG. 5 is a cross-sectional view of another display panel according to an embodiment of the present application. FIG. 5 is obtained by cutting along the cutting line BB' corresponding to FIG. 2. In connection with FIGS. 2, 4, and 5, preferably, in the first border area NAA1, the power supply wiring 700 includes a first wiring portion 710 provided between the bank 600 and the base 100, and the orthographic projection of the first wiring portion 710 on the base 100 is covered by the orthographic projection of the bank 600 on the base 100. The power supply wiring 700 further includes a second wiring portion 720 provided in the second frame area NAA2, and the first wiring portion 710 is connected to the second electrode 330 via the second wiring portion 720. Preferably, the first wiring portion 710 is connected to the isolation structure 400 and the second electrode 330 via the second wiring portion 720.

[0034] For the installation of the bank 600, it is necessary to occupy a frame by itself. Therefore, in this embodiment, the first wiring portion 710 of the power supply wiring 700 is provided between the bank 600 and the base 100, and the orthographic projection of the first wiring portion 710 on the base 100 is covered by the orthographic projection of the bank 600 on the base 100. Thus, the first wiring portion 710 does not extra occupy the frame of the display panel with respect to the bank 600. Therefore, it becomes possible to provide the power supply wiring 700 in the first frame area NAA1, which is advantageous for alleviating the voltage drop during the transmission of the required voltage of the second electrode 330. On the other hand, the width of the first frame area NAA1 can be narrowed, which is advantageous for realizing a narrow frame.

[0035] Continuing to refer to FIG. 5, preferably, the distance (the fourth distance d in FIG. 5) between the edge of the first wiring portion 710 away from the display area AA and the edge of the bank 600 away from the display area AA is greater than 0.

[0036] Due to the installation of the bank 600, the thin film encapsulation layer 500 forms a curved surface shape with undulations at the position of the bank 600, which can extend the intrusion paths of water, oxygen, etc. The bank 600 itself can also play a role in blocking water and oxygen. The orthographic projection of the first wiring portion 710 on the base 100 is covered by the orthographic projection of the bank 600 on the base 100, and the distance between the edge of the first wiring portion 710 away from the display area AA and the edge of the bank 600 away from the display area AA is greater than 0. Thereby, the first wiring portion 710 is not extended outside the bank 600 and is not easily eroded by water, oxygen, etc., and further, the transmission performance of the signal of the first wiring portion 710 can be guaranteed, and a good display effect of the display panel can be guaranteed.

[0037] Referring to FIGS. 4 and 5, in some preferred embodiments of the present application, the power supply wiring 700 and the conductive structure in the display panel are provided in the same layer with the same material and manufactured simultaneously by adopting the same process, so as to achieve the purpose of saving the manufacturing process. Exemplarily, the sources and drain electrodes of the transistors included in the pixel circuit in the power supply wiring 700 and the display panel may be provided in the same layer with the same material and manufactured simultaneously by adopting the same process. As shown in FIG. 5, the power supply wiring 700 and the isolation structure 400 can be connected through a first connection structure L1 in the same layer as the first electrode 210 in the non-display area NAA and a second connection structure L2 in the same layer as the isolation structure 400.

[0038] FIG. 6 is a cross-sectional view of another display panel according to an embodiment of the present application. FIG. 6 is obtained by cutting along the cutting line CC' corresponding to FIG. 2. In another part of the preferred embodiments of the present application, the power supply wiring 700 and the isolation structure 400 are provided in the same layer with the same material and manufactured simultaneously by adopting the same process. Thereby, the manufacturing process can be saved and the manufacturing process of the display panel can be simplified. And the connection between the power supply wiring 700 and the isolation structure 400 does not need to be jumped through other connection structures, and the realization of the connection between the two becomes easier.

[0039] FIG. 7 is a plan view of another display panel according to an embodiment of the present application. Continuing to refer to FIGS. 3 to 7, preferably, the orthographic projection of the isolation structure 400 on the pixel defining layer 200 is located between adjacent second openings 210. The isolation structure 400 includes a support portion 410 and a blocking portion 420. The support portion 410 is located between the blocking portion 420 and the pixel defining layer 200. The orthographic projection of the blocking portion 420 on the pixel defining layer 200 covers the orthographic projection of the support portion 410 on the pixel defining layer 200. The second electrode 330 of the light-emitting element 300 on at least one side of the isolation structure 400 and the support portion 410 of the isolation structure 400 are overlapped and connected, and the support portion 410 conducts electricity.

[0040] The material of the support part 410 may be a conductive material. When the second electrodes 330 of the adjacent light-emitting elements 300 are both connected to the support part 410, the second electrodes 330 of the adjacent light-emitting elements 300 are electrically connected via the support part 410. The material of the support part 410 may be aluminum and / or copper. The material of the barrier part 420 may include a conductive material and / or an insulating material. For example, the material of the barrier part 420 includes titanium, silicon nitride, silicon oxide, etc.

[0041] FIG. 8 is an enlarged view of the isolation structure according to the embodiment of the present application. In connection with FIGS. 3 to 8, preferably, in the connection direction z1 of the second openings 210 on both sides of the isolation structure 400, at the position where the support part 410 and the barrier part 420 are in contact, the size r1 of the support part 410 is smaller than the size r2 of the barrier part 420.

[0042] In the connection direction z1 of the second openings 210 on both sides of the isolation structure 400, at the position where the support part 410 and the barrier part 420 are in contact, the size r1 of the support part 410 is smaller than the size r2 of the barrier part 420. Thereby, an undercut structure is formed on the side surface of the isolation structure 400. Further, when the light-emitting layer of the light-emitting element 300 in the display panel is vapor-deposited, the light-emitting layers of the adjacent light-emitting elements 300 can be cut at the position of the isolation structure 400. Also, the second electrode 330 of the light-emitting element 300 may also be formed by adopting a vapor deposition process. By controlling different vapor deposition angles during the vapor deposition of the second electrode 330 and during the vapor deposition of the light-emitting layer, it is possible for the second electrode 330 to be connected to the support part 410 of the isolation structure 400, and further, it can be realized that the second electrodes 330 of the plurality of light-emitting elements 300 in the display panel are all connected to each other via the isolation structure 400.

[0043] Note that in this embodiment, the shape of the isolation structure 400 is not limited to the shape shown in FIG. 8, as long as it blocks the light-emitting functional layer of the light-emitting element 300 and satisfies that at the position where the support part 410 and the barrier part 420 are in contact, the size of the support part 410 is smaller than the size of the barrier part 420.

[0044] Continuing to refer to FIGS. 3 to 6, based on the above-described multiple embodiments, preferably, the thickness h1 of the support portion 410 is greater than the thickness of the second electrode 330. Thereby, during the manufacture of the light-emitting functional layer 320 and the second electrode 330, it becomes easier to block by the isolation structure 400 of the light-emitting functional layers 320 of adjacent light-emitting elements 300, and it also becomes easier to block by the isolation structure 400 of the second electrodes 330 of adjacent light-emitting elements 300, which is advantageous for avoiding cross-color of adjacent light-emitting elements 300. And the support portion 410 is thick, thereby making it possible to make the sheet resistance of the isolation structure 400 smaller and make the transmission voltage drop in the display area AA of the required voltage of the second electrode 330 smaller.

[0045] Preferably, the thickness of the support portion 410 is greater than or equal to 5000 angstroms. Exemplarily, the thickness of the support portion 410 may be equal to 5000 angstroms, may be equal to 5500 angstroms, or may be equal to 6000 angstroms. The thickness of the support portion 410 is greater than or equal to 5000 angstroms, thereby making the support portion 410 have a large thickness, further ensuring that the support portion 410 can block the light-emitting functional layer 320, and ensuring that the support portion 410 has a small sheet resistance.

[0046] In some preferred embodiments of the present application, the thickness of the support portion 410 is less than or equal to 8000 angstroms. Thereby, in addition to ensuring the blocking effect of the support portion 410 on the light-emitting functional layer 320 and a small sheet resistance, it is possible to prevent the thickness of the display panel from increasing excessively due to the installation of the isolation structure 400, and ensure the thinning of the display panel.

[0047] Continuing to refer to FIGS. 3 to 7, preferably, in the display area AA, the orthographic projection of the base 100 of the isolation structure 400 and the orthographic projection of the base 100 of the pixel defining layer 200 overlap. The orthographic projection of the first opening 401 on the base 100 and the orthographic projection of the second opening 210 on the base 100 completely overlap.

[0048] The orthographic projection of the base 100 of the isolation structure 400 overlaps with the orthographic projection of the base 100 of the pixel defining layer 200, that is, the isolation structure 400 is correspondingly provided in all regions other than the region corresponding to the second opening 210 of the pixel defining layer 200. By doing so, it is ensured that the isolation structure 400 has a large cross-sectional area, the resistance of the isolation structure 400 is reduced, and further the resistance of the overall structure in which the isolation structure 400 and the second electrode 330 are connected is reduced, and the transmission voltage drop of the voltage required for the second electrode 330 can be reduced. On the other hand, when the light-emitting functional layer 320 is vapor-deposited, the light-emitting functional layer 320 can be separated by the isolation structure 400 and limited within the second opening 210 of the pixel defining layer 200, and the performance of the light-emitting element 300 can be guaranteed.

[0049] Continuing to refer to FIG. 7, preferably, the distance m1 between adjacent second openings 210 is greater than or equal to 3 micrometers.

[0050] The distance m1 between adjacent second openings 210 is greater than or equal to 3 micrometers. Thereby, the cross-sectional area of the isolation structure 400 on the side away from the base 100 of the pixel defining layer 200 is increased, the resistance of the isolation structure 400 is reduced, and further the resistance of the overall structure in which the isolation structure 400 and the second electrode 330 are connected is reduced, and the transmission voltage drop of the voltage required for the second electrode 330 can be reduced. Furthermore, the installation in the non-display area NAA of the power supply wiring 700 can be reduced, which is advantageous for realizing a narrow bezel.

[0051] The embodiment of the present application further provides a display device. FIG. 9 is a schematic structural diagram of the display device according to the embodiment of the present application. Referring to FIG. 9, the display device 1 according to the embodiment of the present application includes the display panel 11 according to any of the above embodiments of the present application. The display device may be a mobile phone shown in FIG. 9, or may be a computer, a television, a smart wearable display device, etc., and the embodiment of the present application does not particularly limit this.

[0052] Note that the above are only preferred embodiments of the present application and the technical principles used. Those skilled in the art should understand that the present application is not limited to the specific embodiments described herein, and as those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present application. Therefore, although the above embodiments have been used to explain the present application in detail, the present application is not limited to only the above embodiments, and more other equivalent embodiments may be included as long as they do not deviate from the concept of the present application. The protection scope of the present application is determined by the appended claims.

Claims

1. It includes a display area and a non-display area adjacent to the display area, a base, a plurality of light-emitting elements including a first electrode, a light-emitting functional layer, and a second electrode provided by laminating on the base, an isolation layer including a plurality of isolation openings, with the light-emitting functional layer located within the corresponding isolation openings, a bank provided in the non-display area, located on the same side of the isolation layer and the base, and whose projection on the base surrounds the display area, and further includes a power supply wiring electrically connected to the second electrode, the non-display area includes a first frame area including a first side circuit area between the bank and the display area, and the power supply wiring is provided in at least a part of the area excluding the first side circuit area of the non-display area, a display panel.

2. The first electrode is the anode of the light-emitting element, and the second electrode is the cathode of the light-emitting element, The display panel according to Claim 1.

3. The isolation layer further includes a pixel defining layer provided on one side of the base of the display panel and an isolation structure provided on the side of the pixel defining layer away from the base, the isolation structure surrounds and closes to form a first opening, the pixel defining layer surrounds and closes to form a second opening, the orthographic projection of the second opening on the base is within the orthographic projection of the first opening on the base, the isolation opening includes the first opening and the second opening, and at least a part of the light-emitting functional layer is located within the second opening, The display panel according to Claim 1.

4. The second electrode of at least some of the light-emitting elements is overlapped and connected to the isolation structure, and the isolation structure conducts electricity, The display panel according to Claim 3.

5. It further includes a thin film encapsulation layer covering at least the plurality of light-emitting elements and including at least an organic encapsulation layer, The bank is used to block the organic encapsulation layer, The display panel according to Claim 1.

6. It further includes a scanning line extending along a first direction and a data line extending along a second direction intersecting the first direction, the non-display area includes two first frame areas facing each other along the first direction, the non-display area further includes a second frame area located on one side of the display area along the second direction, and at least a part of the power supply wiring is provided in the second frame area, The display panel according to Claim 1 or 3.

7. The second frame area includes a second side circuit area between the bank and the display area, at least a part of the power supply wiring is provided in the second side circuit area, and a driving chip for providing a data signal is further provided in the second frame area. The display panel according to claim 6.

8. A gate driving circuit including at least one of a scanning circuit for generating a scanning signal and a light emission control circuit for generating a light emission control signal is provided in the first side circuit area. The display panel according to claim 6.

9. The non-display area further includes a third frame area facing the second frame area along the second direction. The display panel according to claim 6.

10. The frame width of the corresponding display panel in the first frame area is equal to the sum of the distance between the bank and the display area, the frame width occupied by the bank, and the distance between the bank and the edge of the display panel. The display panel according to claim 6.

11. In the first frame area, the power supply wiring is provided between the bank and the base, and includes a first wiring portion whose orthographic projection on the base is covered by the orthographic projection of the bank on the base. The power supply wiring further includes a second wiring portion provided in the second frame area, and the first wiring portion is connected to the second electrode through the second wiring portion. The display panel according to claim 6.

12. The distance between the edge of the first wiring portion away from the display area and the edge of the bank away from the display area is greater than 0. The display panel according to claim 11.

13. The orthographic projection of the isolation structure on the pixel defining layer is located between adjacent second openings. The isolation structure includes a support portion located between the blocking portion and the pixel defining layer, and a blocking portion whose orthographic projection on the pixel defining layer covers the orthographic projection of the support portion on the pixel defining layer. The second electrode of the light emitting element on at least one side of the isolation structure and the support portion of the isolation structure are overlapped and connected, and the support portion conducts electricity. The display panel according to claim 3.

14. In the connection direction of the second openings on the opposite sides of two adjacent isolation structures, at the position where the support portion and the blocking portion are in contact, the size of the support portion is smaller than the size of the blocking portion. The display panel according to claim 13.

15. The thickness of the support portion is greater than the thickness of the second electrode. The display panel according to claim 13.

16. The thickness of the support portion is greater than or equal to 5000 angstroms. The display panel according to claim 15.

17. In the display area, the orthographic projection of the isolation structure on the base overlaps with the orthographic projection of the pixel defining layer on the base. The display panel according to claim 3.

18. The distance between adjacent second openings is greater than or equal to 3 micrometers. The display panel according to claim 17.

19. The power supply wiring and the isolation structure are provided in the same layer with the same material and are manufactured simultaneously by adopting the same process. The display panel according to claim 3.

20. Including the display panel according to any one of claims 1 to 19. A display device.

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