A display panel, a display device, and a method for manufacturing the display panel.

Abstract

The present disclosure provides a display panel, a display device, and a method for manufacturing a display panel. A display panel includes a substrate, the substrate includes a display area and a functional area, the functional area includes a light-transmitting area, the light-transmitting area includes a plurality of pixel units, the pixel units are capable of emitting white light, each of the pixel units includes at least one sub-pixel, each of the pixel units also includes a cathode, the plurality of cathodes are separated from each other in the orthographic projection of the substrate, the orthographic projection of the effective light-emitting area of ​​each sub-pixel on the substrate is located within the range of the orthographic projection of the cathode of the corresponding pixel unit on the substrate, and the display panel also includes a connection structure, the connection structure is arranged in the same layer as the cathode, and different cathodes are connected through the connection structure. The opening area of ​​the cathode layer in the light-transmitting area is increased, which helps to improve the transparency of the light-transmitting area.

Description

Technical Field

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

[0002] OLED (Organic light-emitting diode) display technology has the advantages of high brightness, low power consumption, fast response, high clarity, etc. With the development and maturity of OLED (Organic light-emitting diode) display technology, OLED display devices are becoming more and more popular among users. Summary of the invention

[0003] In a first aspect, an embodiment of the present disclosure provides a display panel, comprising a substrate, wherein the substrate comprises a display area and a functional area, the functional area comprises a light-transmitting area, the light-transmitting area comprises a plurality of pixel units, the pixel units are capable of emitting white light, each of the pixel units comprises at least one sub-pixel, each of the pixel units further comprises a cathode, the plurality of cathodes are separated from each other in the orthographic projection of the substrate, the orthographic projection of an effective light-emitting area of ​​each sub-pixel on the substrate is located within the range of the orthographic projection of the cathode of the corresponding pixel unit on the substrate, and the display panel further comprises a connecting structure, the connecting structure is arranged at the same layer as the cathode, and different cathodes are connected through the connecting structure.

[0004] Optionally, the orthographic projection of the edge of the cathode on the substrate is separated from the orthographic projection of the effective light-emitting area of ​​the corresponding sub-pixel on the substrate, and the edge of the cathode overlaps with the orthographic projection of the anode of the corresponding sub-pixel on the substrate.

[0005] Optionally, the orthographic projection of the anode of the sub-pixel included in the pixel unit on the substrate is located within the orthographic projection of the cathode of the pixel unit on the substrate.

[0006] Optionally, an orthographic projection of an edge of the anode on the substrate partially overlaps with an orthographic projection of a corresponding cathode on the substrate.

[0007] Optionally, in an area outside an overlap area of ​​an orthographic projection of the anode on the substrate and an orthographic projection of a corresponding cathode on the substrate, an orthographic projection of an edge of the cathode on the substrate extends along a straight line.

[0008] Optionally, the edges of the cathode are chamfered, and the chamfer of the edges of the cathode is greater than 30 degrees.

[0009] Optionally, the plurality of cathodes and the connection structure in the light-transmitting area form a mesh structure, the mesh structure includes a plurality of openings, each of the openings is surrounded by the cathode and the connection structure, and the cathode and the connection structure are made of the same material.

[0010] Optionally, the multiple cathodes are arranged along a first direction to form cathode rows, and the multiple cathode rows are arranged along a second direction, the angle between the first direction and the second direction is 80-100 degrees, and two adjacent cathode rows are staggered in the first direction.

[0011] Optionally, the functional area also includes a transition area and a pixel circuit area, the pixel circuit area is arranged around the light-transmitting area, the transition area is arranged between the pixel circuit area and the light-transmitting area, the transition area and the pixel circuit area share a cathode, and the positive projection of the cathode on the substrate is a solid figure in the transition area and the pixel circuit area.

[0012] Optionally, the display panel further includes a plurality of arc-shaped windings, the windings extending along edges of the light-transmitting area, and the windings connected to pixel circuits located in the pixel circuit area via routing lines located in the transition area.

[0013] Optionally, a semiconductor layer is further included, and in the transition region, the semiconductor layer includes a plurality of redundant patterns, and the redundant patterns are spaced apart and arranged in an array.

[0014] Optionally, it also includes a first gate layer located between the semiconductor layer and the anode layer, the first gate layer includes a plurality of first transfer lines located in the transition zone, the size of the first transfer lines in the second direction is larger than the size in the first direction, the plurality of first transfer lines are arranged along the first direction and are parallel to each other, and the orthographic projection of the first transfer lines on the substrate is separated from the orthographic projection of the redundant pattern on the substrate.

[0015] Optionally, it also includes a second gate layer located between the first gate layer and the anode layer, the second gate layer includes a plurality of second transfer lines located in the transition zone, the upper dimension of the second transfer lines in the second direction is larger than the dimension in the first direction, the orthographic projection of the second transfer line on the substrate is separated from the orthographic projection of the redundant pattern on the substrate and the orthographic projection of the first transfer line on the substrate, and the ratio of the distance between two adjacent first transfer lines to the distance between two adjacent second transfer lines is 0.8-1.2.

[0016] Optionally, it further includes an interlayer insulating layer located between the second gate layer and the anode layer, and in the transition region, the interlayer insulating layer includes a plurality of vias, and the orthographic projection of each via on the substrate overlaps with the orthographic projection of one of the redundant patterns on the substrate.

[0017] Optionally, it also includes a first metal layer located between the interlayer insulating layer and the anode layer, and in the transition zone, the first metal layer includes a plurality of third transfer lines, the size of the third transfer lines in the first direction is larger than the size in the second direction, the angle between the orthographic projection of the third transfer line on the substrate and the orthographic projection of the first transfer line on the substrate is 80-100 degrees, and the orthographic projection of the third transfer line on the substrate is separated from the orthographic projection of the redundant pattern on the substrate.

[0018] Optionally, it also includes a transparent wire layer located between the first metal layer and the anode layer, the transparent wire layer includes a transparent routing and a first redundant routing extending along the first direction, the transparent routing and the first redundant routing are separated, and the transparent wire layer also includes a plurality of second redundant routing extending along the second direction.

[0019] Optionally, each anode is connected to a transparent wiring through the anode hole, the transparent wiring is connected to a pixel circuit arranged in the pixel circuit area, and the first redundant wiring is connected to the second redundant wiring.

[0020] Optionally, the sub-pixels corresponding to each pixel unit include two green sub-pixels, one red sub-pixel and one blue sub-pixel, the two green sub-pixels are arranged along the second direction, and the effective light-emitting area of ​​the blue sub-pixel is located between the effective light-emitting areas of the two green sub-pixels in the second direction.

[0021] Optionally, the effective light-emitting areas of the two green sub-pixels substantially overlap with a center line along the second direction, and the effective light-emitting areas of the blue sub-pixel and the red sub-pixel are located on the same side of the center line.

[0022] In a second aspect, an embodiment of the present disclosure provides a display device, comprising the display panel described in any one of the first aspects, wherein a camera is disposed in the light-transmitting area.

[0023] In a third aspect, an embodiment of the present disclosure provides a method for manufacturing a display panel, which is used to manufacture the display panel described in any one of the first aspects, wherein the method includes a step of forming a cathode, and the step of forming a cathode includes:

[0024] forming a cathode material layer;

[0025] Burning the cathode material layer by laser to pattern the cathode material layer;

[0026] The residual particles of the cathode material layer are removed by plasma air knife.

[0027] Optionally, the step of burning the cathode material layer with a laser to pattern the cathode material layer includes:

[0028] Placing a display substrate including a cathode material layer on a processing platform of a laser etching device;

[0029] capturing the alignment mark on the display substrate using the laser etching device;

[0030] According to the position of the alignment mark and the position of the cathode, the cathode material layer is burned by laser to pattern the cathode material layer to form an image of the cathode.

[0031] Each pixel unit in the light-transmitting area of ​​the disclosed embodiment includes a cathode, and the orthographic projections of the plurality of cathodes on the substrate are separated from each other, and the orthographic projection of the effective light-emitting area of ​​each sub-pixel on the substrate is located within the range of the orthographic projection of the cathode of the corresponding pixel unit on the substrate, and the display panel also includes a connection structure, which is arranged in the same layer as the cathode, and different cathodes are connected through the connection structure. In this way, the disclosed embodiment increases the opening area of ​​the cathode layer in the light-transmitting area, which helps to improve the transparency of the light-transmitting area. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the description of the embodiments of the present disclosure will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0033] Figure 1 is a schematic structural diagram of a display substrate in one embodiment of the present disclosure;

[0034] Figure 2 is a schematic diagram of a stack of an anode and a cathode in one embodiment of the present disclosure;

[0035] Figure 3 is a schematic diagram of a stack of an anode and a cathode in another embodiment of the present disclosure;

[0036] Figure 4 is a schematic diagram of a stack of an anode and a cathode in another embodiment of the present disclosure;

[0037] Figure 5 is a schematic diagram of a stack of an anode and a cathode in another embodiment of the present disclosure;

[0038] Figure 6 is a schematic diagram of a stack of an anode and a cathode in another embodiment of the present disclosure;

[0039] Figure 7 is a schematic diagram of a stack of an anode and a cathode in another embodiment of the present disclosure;

[0040] Figure 8 is a schematic diagram of a stack of an anode and a cathode in another embodiment of the present disclosure;

[0041] Fig. 9 is a schematic diagram of a stack of an anode and a cathode in another embodiment of the present disclosure;

[0042] Fig.10 is a schematic diagram of the connection between the cathode and the connection structure in one embodiment of the present disclosure;

[0043] Fig.11 is a schematic diagram of a stack of an anode and a cathode in another embodiment of the present disclosure;

[0044] Fig.12 yes Fig.11 A schematic diagram of the connection of the cathode and the routing in the embodiment shown;

[0045] Fig.13 is a schematic structural diagram of a semiconductor layer in one embodiment of the present disclosure;

[0046] Fig.14 is a schematic diagram of a stack of a semiconductor layer and a first gate layer in an embodiment of the present disclosure;

[0047] Fig.15 is a schematic diagram of a stack of a semiconductor layer, a first gate layer, and a second gate layer in one embodiment of the present disclosure;

[0048] Fig.16 is a schematic diagram of a stack of a semiconductor layer, a first gate layer, and a second gate layer in one embodiment of the present disclosure;

[0049] Fig.17 is a schematic diagram of a stack of a semiconductor layer, a first gate layer, a second gate layer and a first metal layer in one embodiment of the present disclosure;

[0050] Fig.18 is a schematic diagram of stacking of a semiconductor layer, a first gate layer, a second gate layer, a first metal layer, and a first planar layer in one embodiment of the present disclosure;

[0051] Fig.19 is a schematic diagram of a stack of a semiconductor layer, a first gate layer, a second gate layer, a first metal layer, a first planar layer, and a transparent wiring in one embodiment of the present disclosure;

[0052] Fig. 20 is a schematic diagram of stacking of a semiconductor layer, a first gate layer, a second gate layer, a first metal layer, a first planar layer, a transparent trace, and a second planar layer in one embodiment of the present disclosure;

[0053] Fig.21 is a schematic diagram of stacking of a semiconductor layer, a first gate layer, a second gate layer, a first metal layer, a first planar layer, a transparent wiring, a second planar layer and an anode in one embodiment of the present disclosure;

[0054] Fig. 22is a schematic diagram of stacking of a semiconductor layer, a first gate layer, a second gate layer, a first metal layer, a first planar layer, a transparent wiring, a second planar layer, an anode and a pixel defining layer in one embodiment of the present disclosure;

[0055] Fig.23 Schematic diagram of the pixel structure of the light-transmitting area in one embodiment of the present disclosure. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0057] The present disclosure provides a display panel.

[0058] like Figure 1 As shown, in one embodiment, the display panel includes a substrate, the substrate includes a display area 10, in some embodiments, the display area 10 includes a plurality of pixel units, and the specific structure of the display area 10 can refer to the display area 10 setting of the display panel in the related art, which will not be repeated here.

[0059] The substrate further includes a functional area, which includes a light-transmitting area 11 . The light-transmitting area 11 has higher transparency than the display area 10 , so that other components can be arranged corresponding to the light-transmitting area 11 .

[0060] Exemplarily, the light-transmitting area 11 can be provided with an under-screen camera. Accordingly, in this embodiment, the light-transmitting area 11 is set to be circular or substantially circular to adapt to the shape of the camera. Since the light-transmitting area 11 has higher transparency, it helps to improve the imaging effect. Obviously, the application scope of the light-transmitting area 11 is not limited to this, for example, it can also be applied to transparent display devices, etc., which is not further limited here.

[0061] The light-transmitting area 11 includes a plurality of pixel units, each of which can emit white light. Each pixel unit includes at least one sub-pixel. Figure 1 Each pixel unit further includes a cathode 101, and the positive projections of the plurality of cathodes 101 on the substrate are separated from each other.

[0062] The orthographic projection of the effective light-emitting area of ​​each sub-pixel on the substrate is located within the range of the orthographic projection of the cathode 101 of the corresponding pixel unit on the substrate, such as Fig.10 As shown, the display panel further includes a connection structure 101A. The connection structure 101A is disposed in the same layer as the cathode 101 , and different cathodes 101 are connected via the connection structure 101A.

[0063] The light-emitting unit of the sub-pixel includes a cathode 101, a light-emitting layer and an anode 102 which are stacked in sequence. More specifically, along the direction from the anode 102 to the cathode 101, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer and an electron injection layer which are stacked in sequence may be included between the anode 102 and the cathode 101. In some of the embodiments, an electron blocking layer may be provided between the hole transport layer and the light-emitting layer, and a hole blocking layer may be provided between the light-emitting layer and the electron transport layer. It should be understood that, under normal circumstances, in order to ensure the display effect, the injected electrons are excessive. Generally speaking, an electron blocking layer needs to be provided, and the hole blocking layer may be omitted.

[0064] It should be understood that the cathode 101 of the light emitting unit is usually a whole surface structure. Figure 1 For example, in the display area 10, the anode 102 of the light-emitting unit is patterned, while the cathode 101 of the light-emitting unit is a whole-surface structure. In other words, in the display area 10, the cathode 101 is not patterned, and the cathode 101 not only covers the anode 102, but also covers the area outside the anode 102. The whole-surface cathode 101 has a certain shielding effect on light, which affects the light transmittance of the structure.

[0065] In this embodiment, in the light-transmitting area 11, the cathode layer is composed of a plurality of independent cathodes 101 obtained by patterning. Figure 1 In the light-transmitting area 11, the black-filled figure represents the laminated structure of the cathode 101 and the anode 102, that is, the cathode 101 covers the area where the anode 102 is located, and other cathode materials are removed to a certain extent to reduce the shielding of light and improve the transparency of the light-transmitting area 11. Fig.10 As shown, the cathodes 101 are electrically connected via the connection structure 101A, thereby providing the same common voltage to form a common electrode.

[0066] In this way, the embodiment of the present disclosure avoids affecting the normal operation of the light-emitting unit by controlling the orthographic projection of the effective light-emitting area of ​​each sub-pixel in the light-transmitting area 11 on the substrate to be located within the range of the orthographic projection of the cathode 101 of the corresponding pixel unit on the substrate. At the same time, since the cathode layer is composed of a plurality of cathodes 101, the opening area of ​​the cathode 101 layer in the light-transmitting area 11 is increased due to the absence of cathode material in other areas, which helps to improve the transparency of the light-transmitting area 11.

[0067] In some of the embodiments, the orthographic projection of the edge of the cathode 101 on the substrate is separated from the orthographic projection of the effective light-emitting area of ​​the corresponding sub-pixel on the substrate, and the edge of the cathode 101 overlaps with the orthographic projection of the anode 102 of the corresponding sub-pixel on the substrate, thereby avoiding occupying more space. In this way, it helps to increase the opening area of ​​the cathode 101 and the transmittance while ensuring the display effect.

[0068] In some of the embodiments, the orthographic projection of the anode 102 of the sub-pixel included in the pixel unit on the substrate is located within the orthographic projection of the cathode 101 of the pixel unit on the substrate. It can be understood that the multiple sub-pixels of each pixel unit are arranged corresponding to the same cathode 101, and the positions of the multiple sub-pixels of the same pixel unit are relatively close, which helps to increase the opening area of ​​the cathode 101 and improve the transmittance.

[0069] like Figures 2 to 9 As shown, in this embodiment, the sub-pixels of each pixel can be arranged in different ways, and accordingly, the anodes 102 of the sub-pixels are arranged in different ways. For different arrangements, the cathodes 101 of each sub-pixel of each pixel unit increase the effective light-emitting area of ​​the pixel, thereby improving the applicability to different types of display substrates.

[0070] In some embodiments, an orthographic projection of an edge of the anode 102 on the substrate partially overlaps with an orthographic projection of a corresponding cathode 101 on the substrate.

[0071] It can be understood that, when observed in a direction perpendicular to the substrate, a portion of the edge of the cathode 101 of a pixel unit overlaps a portion of the edge of the anode 102 of the sub-pixel included in the pixel unit. In this way, since the positive projection of the anode 102 on the substrate is within the range of the positive projection of the cathode 101 on the substrate, the electron injection effect can be guaranteed and the display effect will not be affected. At the same time, by controlling the overlap area of ​​the edges of the anode 102 and the cathode 101, the area of ​​the cathode 101 can be reduced as much as possible, which helps to increase the area of ​​the opening area corresponding to the cathode 101 and improve the light transmittance.

[0072] In some of the embodiments, in a region other than the overlapped region of the orthographic projection of the anode 102 on the substrate and the corresponding orthographic projection of the cathode 101 on the substrate, the orthographic projection of the edge of the cathode 101 on the substrate extends along a straight line.

[0073] It can be understood that a portion of the edge of the cathode 101 extends along the edge of the anode 102, and another portion of the edge extends along a straight line, so as to reduce the area of ​​the cathode 101 and improve the light transmittance of the display substrate.

[0074] In some embodiments, the edges of the cathode 101 are chamfered, and the chamfer of the edge of the cathode 101 is greater than 30 degrees.

[0075] like Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, the anode 102 may have sharp corners at certain locations. If the cathode 101 extends completely along the edge of the anode 102 in this area, a sharp corner structure will also be formed. In addition, the cathode 101 may also have a sharp corner at a location where the edge of the cathode 101 is separated from the edge of the anode 102.

[0076] Relevant technicians have found in the process of implementing the technical solution of the present disclosure that the sharp-angle structure may aggravate the diffraction of light, affecting the display effect and the imaging effect of the under-screen camera. Therefore, in this embodiment, the edges of the cathode 101 are chamfered to reduce the possibility of light diffraction. In some embodiments, the edge chamfer of the cathode 101 is greater than 30 degrees, which can reduce the possible light diffraction phenomenon.

[0077] like Fig.10 As shown, in some of the embodiments, the multiple cathodes 101 and the connecting structure 101A of the light-transmitting area 11 form a mesh structure, and the mesh structure includes a plurality of openings, each of which is surrounded by the cathode 101 and the connecting structure 101A, which can increase the opening area of ​​the light-transmitting area 11, thereby improving the transmittance of the light-transmitting area 11. In some of the embodiments, the cathode 101 and the connecting structure 101A are made of the same material, which helps to reduce the contact resistance between the cathode 101 and the connecting structure 101A and improve the luminous efficiency.

[0078] like Fig.11 As shown, in some embodiments, the orthographic projection of the cathode 101 on the substrate and the orthographic projection of the anode 102 on the substrate completely overlap, and correspondingly, their edges also completely overlap. It can be understood that the number and position of the cathode 101 and the anode 102 are one-to-one corresponding, and their shapes and sizes are also the same. In this way, the opening area corresponding to the cathode 101 can be maximized, and the light transmittance of the display substrate can be improved.

[0079] like Fig.12 As shown, the cathodes 101 corresponding to each anode 102 may also be connected via a connection structure 101A to provide a common voltage.

[0080] like Figure 1 As shown, in some embodiments, a plurality of cathodes 101 are arranged along a first direction to form a cathode 101 row, and a plurality of cathode 101 rows are arranged along a second direction. In this embodiment, one of the first direction and the second direction may be an extension direction of a scan line in a display panel, and the other may be an extension direction of a data line in a display panel. For example, in this embodiment, the first direction is Figure 1The second direction is Figure 1 The included angle between the first direction and the second direction is 80-100 degrees, and two adjacent rows of cathodes 101 are staggered in the first direction. It can be understood that the positions of the two adjacent rows of cathodes 101 along the second direction are not aligned, which helps to increase the number of cathodes 101 per unit area, improve space utilization, and thus improve the resolution of the display panel.

[0081] like Figure 1 As shown, in some embodiments, the functional area also includes a transition area 12 and a pixel circuit area 13, the pixel circuit area 13 is arranged around the light-transmitting area 11, the transition area 12 is arranged between the pixel circuit area 13 and the light-transmitting area 11, the transition area 12 and the pixel circuit area 13 share a cathode 101, and the positive projection of the cathode 101 on the substrate on the transition area 12 and the pixel circuit area 13 is a solid figure, where the solid figure refers to the whole surface structure that has not been patterned.

[0082] like Figure 1 As shown, in this embodiment, the transition area 12 is roughly annular and surrounds the light-transmitting area 11, the inner contour of the pixel circuit area 13 is circular, and the outer contour is an irregular pattern, and the pixel circuit area 13 surrounds the transition area 12. It should be understood that the edges of the transition area 12 and the pixel circuit area 13 in this embodiment are only used to exemplify the approximate boundary positions between the various areas, and are not actual boundary structures.

[0083] Please also see Figure 1 and Fig.13 In some embodiments, the display substrate further includes a semiconductor layer 201. In the transition region 12, the semiconductor layer 201 includes a plurality of redundant patterns 201A (dummy), which are arranged at intervals and in an array. In this embodiment, a plurality of redundant patterns 201A are further provided, and the redundant patterns 201A are used for auxiliary positioning to assist in improving the accuracy of the exposure position of the wiring.

[0084] Please also see Figure 1 and Fig.14 In some of the embodiments, the display panel further includes a plurality of arc-shaped windings 202 , the windings 202 extending along the edge of the light-transmitting area 11 , and the windings 202 are connected to the pixel circuits located in the pixel circuit area 13 through the routing located in the transition area 12 .

[0085] It can be understood that the light-transmitting area 11 in this embodiment is not provided with a driving circuit, and the driving circuits of the pixel units in the light-transmitting area 11 are all arranged in the pixel circuit area 13. The driving circuits in the pixel circuit area 13 are connected to the light-emitting units located in the light-transmitting area 11 through the wiring located in the transition area 12, which helps to further improve the transparency of the light-transmitting area 11.

[0086] like Fig.14 and Fig.15 As shown, the above wiring includes a first adapter line 203 and a second adapter line 204 .

[0087] like Fig.14 As shown, in some embodiments, the display substrate also includes a first gate layer located between the semiconductor layer 201 and the anode layer 102, the first gate layer includes a plurality of first transfer lines 203 located in the transition region 12, the upper dimension of the first transfer lines 203 in the second direction is larger than the dimension in the first direction, the plurality of first transfer lines 203 are arranged along the first direction and are parallel to each other, and the orthographic projection of the first transfer lines 203 on the substrate is separated from the orthographic projection of the redundant pattern 201 on the substrate.

[0088] like Fig.14 As shown, it can be understood that the first transfer line 203 is located between two adjacent columns of redundant patterns 201 along the second direction, which helps to improve the uniformity of the thickness of the structure at different positions of the display panel.

[0089] like Fig.15 As shown, in some embodiments, a second gate layer is further included between the first gate layer and the anode 102 layer, the second gate layer includes a plurality of second transfer lines 204 located in the transition region 12, the second transfer lines 204 extend along a second direction, and the orthographic projection of the second transfer lines 204 on the substrate is separated from the orthographic projection of the redundant pattern 201 on the substrate and the orthographic projection of the first transfer lines 203 on the substrate.

[0090] like Fig.15 As shown, similar to the arrangement of the first adapter line 203, the second adapter line 204 in this embodiment is also arranged between two adjacent columns of redundant patterns 201 along the second direction, and the first adapter line 203 and the second adapter line 204 are located between different columns of redundant patterns 201, which helps to improve the uniformity of thickness in different areas of the display panel. The ratio of the distance between two adjacent first adapter lines 203 to the distance between two adjacent second adapter lines 204 is 0.8-1.2, which helps to further improve the uniformity of thickness in different areas of the display substrate.

[0091] It should be understood that Fig.15 The dotted line used to represent the second patch cord 204 is only used to distinguish the position of the second patch cord 204 and does not represent the actual structure of the second patch cord 204 .

[0092] The first adapter wire 203 and the second adapter wire 204 are mainly used to realize the electrical connection of the pixel circuit. It should be understood that due to the existence of the light-transmitting area 11, the pixel circuit is spaced apart in the second direction. Fig.14 and Fig.15As shown, two ends of the first adapter line 203 and the second adapter line 204 are respectively connected to the winding 202, and the other end is connected to the pixel circuit. Along the second direction, the first adapter line 203 and the second adapter line 204 corresponding to the winding 202 are also arranged on the other side of the light-transmitting area 11. In this way, the electrical connection of the pixel circuits located on the opposite sides of the light-transmitting area 11 is realized. At the same time, it is avoided to set the wiring in the light-transmitting area 11, which helps to further improve the transparency of the light-transmitting area 11.

[0093] In some embodiments, an interlayer insulating layer is further included between the second gate layer and the anode 102 layer. In the transition region 12, the interlayer insulating layer includes a plurality of vias 205, and the orthographic projection of each via 205 on the substrate overlaps with the orthographic projection of a redundant pattern 201 on the substrate. By controlling the position of the via 205 of the interlayer insulating layer and the overlap of the orthographic projection of the redundant pattern 201, the uniformity of the thickness of the display panel is improved.

[0094] like Fig.17 As shown, in some embodiments, a first metal layer is further included between the interlayer insulating layer and the anode 102 layer. In the transition region 12, the first metal layer includes a plurality of third transfer lines 206. The size of the third transfer lines 206 in the first direction is greater than the size in the second direction. The angle between the orthographic projection of the third transfer line 206 on the substrate and the orthographic projection of the first transfer line 206 on the substrate is 80-100 degrees. The orthographic projection of the third transfer line 206 on the substrate is separated from the orthographic projection of the redundant pattern 201 on the substrate. Similar to the functions of the first transfer line 203 and the second transfer line 204, the third transfer line 206 is used to realize the connection of the pixel circuit in the first direction.

[0095] In this embodiment, similar to the configuration of the first adapter line 203 and the second adapter line 204 , the third adapter line 206 in this embodiment is located between two adjacent rows of redundant patterns 201 along the first direction, which helps to improve the uniformity of the thickness of the display panel.

[0096] like Fig.18 As shown, a first planar layer (not marked) may be provided as required on a side of the first metal layer away from the substrate.

[0097] like Fig.19 As shown, in some embodiments, a transparent wire layer is further included between the first metal layer and the anode 102, the transparent wire layer includes a transparent routing 207 and a first redundant routing 208 extending along a first direction, the transparent routing 207 and the first redundant routing 208 are separated, and the transparent wire layer also includes a plurality of second redundant routings 209 extending along a second direction.

[0098] like Fig.19As shown, in some embodiments, each anode 102 is connected to a transparent wiring 207 through an anode hole, the transparent wiring 207 is connected to a pixel circuit disposed in the pixel circuit area 13, and the first redundant wiring 208 is connected to the second redundant wiring 209.

[0099] In this embodiment, the first redundant wiring 208 and the second redundant wiring 209 are used to balance the thickness of different regions of the display panel, improve the uniformity of the thickness of different structures, and help improve the display effect.

[0100] like Fig. 20 As shown, the display substrate further includes a second planar layer (not labeled) to improve the planarity of the anode 102 to be fabricated subsequently.

[0101] like Fig.21 As shown, the anode 102 is disposed on a side of the second planar layer away from the substrate, and the anode 102 is connected to a transparent wiring 207 through an anode hole.

[0102] like Fig. 22 As shown, a pixel defining layer (not marked) is further provided on the side of the anode away from the substrate to define the scope of the effective light emitting area of ​​each pixel.

[0103] like Fig.23 As shown, in some of the embodiments, each pixel unit includes a plurality of sub-pixels, and the anodes of the plurality of sub-pixels are separated from each other in the positive projection of the substrate. Exemplarily, the sub-pixels corresponding to each pixel unit include two green sub-pixels G, one red sub-pixel R and one blue sub-pixel B, and the two green sub-pixels G are arranged along the second direction, and the effective light-emitting area of ​​the blue sub-pixel B is located between the effective light-emitting areas of the two green sub-pixels G in the second direction.

[0104] The pixel unit in this embodiment includes four sub-pixels, which may be RGGB (red, green, green, blue) sub-pixels, respectively. The edge of the anode 102 and the edge of the cathode 101 of the four sub-pixels have overlapping areas.

[0105] In some embodiments, the effective light-emitting areas of the two green sub-pixels G substantially overlap along a center line of the second direction, and the effective light-emitting areas of the blue sub-pixel B and the red sub-pixel R are located on the same side of the center line.

[0106] In the second direction, the distances from the effective light-emitting area of ​​the blue sub-pixel B to the effective light-emitting areas of the two green sub-pixels G are approximately equal, the effective light-emitting area of ​​the red sub-pixel R does not overlap with the effective light-emitting area of ​​the blue sub-pixel B in the first direction, and the effective light-emitting area of ​​the red sub-pixel R overlaps with the effective light-emitting area of ​​a green sub-pixel G in the first direction.

[0107] In the second direction, the effective light-emitting area of ​​the red sub-pixel R is located on the side of the effective light-emitting area of ​​the blue sub-pixel B away from the green sub-pixel G, the anode holes of some blue sub-pixels B are located on one side of the effective light-emitting area of ​​the blue sub-pixel B in the second direction, and the anode holes of some blue sub-pixels B are located on the other side.

[0108] As shown in FIG. 24 , for the pixel unit at the upper left corner, the anode hole of the blue sub-pixel B is located on the left, while for the pixel unit at the lower right corner, the anode hole of the blue sub-pixel B is located on the right.

[0109] The embodiment of the present disclosure provides a method for manufacturing a display panel, which is used to manufacture any of the above display panels, the method comprising a step of forming a cathode 101, the step of forming the cathode 101 comprising:

[0110] forming a cathode material layer;

[0111] Burning the cathode material layer by laser to pattern the cathode material layer;

[0112] The residual particles of the cathode material layer are removed by plasma air knife.

[0113] In this embodiment, the cathode material layer is patterned by laser etching to form a cathode layer, and a plasma air knife is further used to remove residual particles to ensure the quality of the formed cathode pattern.

[0114] In some embodiments, the shape of the positive projection of the cathode 101 on the substrate is an asymmetric shape.

[0115] In the process of implementing the technical solution of the present disclosure, the technicians of the present disclosure found that the cathode 101 can be patterned by pre-shielding with an Openmask or FMM mask. However, due to the limitation of the mesh used, the cathode 101 pattern formed must be a symmetrical structure, resulting in a reduced aperture ratio. The relevant process requires the use of special cathode materials, which have a low single-layer transmittance and aggravate the diffraction of light.

[0116] In this embodiment, the cathode 101 is obtained by laser etching and patterning, and the obtained cathode 101 is an asymmetric structure. Compared with the symmetrical cathode 101, the asymmetric structure helps to reduce light diffraction and helps to increase the aperture ratio, that is, to increase the light transmittance. In addition, laser etching and patterning can be implemented on the basis of conventional cathode 101 materials, for example, conventional cathode 101 materials such as MgAg (magnesium silver alloy) can be selected, which also helps to control costs.

[0117] It should be understood that laser ablation etching will generate a lot of heat. During implementation, the pixel definition layer can be used as a buffer to reduce the impact that may be caused by the heat generated during the etching process.

[0118] In some embodiments, the step of patterning the cathode material layer by burning the cathode material layer with a laser comprises:

[0119] Placing a display substrate including a cathode material layer on a processing platform of a laser etching device;

[0120] capturing the alignment mark on the display substrate using the laser etching device;

[0121] According to the position of the alignment mark and the position of the cathode, the cathode material layer is burned by laser to pattern the cathode material layer to form an image of the cathode.

[0122] In this embodiment, in the process of patterning the cathode material layer to form a cathode, a laser etching device is first used to capture the alignment mark, and then the cathode material layer outside the cathode is burned according to the relative position of the alignment mark and the cathode in the preset drawing, and the remaining cathode material layer forms a patterned cathode pattern at the specified position.

[0123] The opening rate of the opening area of ​​other structures is m, the opening rate of the opening area corresponding to the cathode 101 is n, and the opening area corresponding to the cathode 101 is located within the range of the opening area of ​​other structures. The light transmittance of the cathode 101 is x, and the transmittance without the light blocking layer is C.

[0124] When the cathode 101 is not patterned, the light transmittance Tr.1 = C*[m*x], and when the cathode 101 is patterned, the light transmittance Tr.2 = C*[(mn)*x+n*1]. Tr.1 and Tr.2 are the corresponding light transmittances. Further, it can be obtained that Tr.2 / Tr.1 = 1+(1-x)n / (mx).

[0125] In one embodiment, illustratively, taking m=92.35%, n=86.78%, and x=55% as an example, after calculation, Tr.2 / Tr.1 is approximately equal to 1.77, which shows that the light transmittance of the display substrate is significantly increased.

[0126] In some of the embodiments, the connection structure 101A can be set in the same layer and material as the cathode 101. Specifically, it can be formed simultaneously when the cathode 101 material layer is patterned to obtain the cathode 101, that is, the cathode 101 and the connection structure 101A are manufactured through a single composition process, which helps to save production costs and production processes.

[0127] In the process of implementing the technical solution of the present invention, technicians found that due to factors such as processing technology, the width of the connecting structure 101A set in the same layer and material as the cathode 101 needs to be greater than 5 microns. After further research, it was found that this solution will cause the transmittance of light of the display substrate to decrease, and may also cause the diffraction of light to increase, affecting the display effect and the imaging effect of the under-screen camera.

[0128] In some other embodiments, the cathodes 101 are electrically connected via the connection structure 101A, and the connection structure 101A and the cathodes 101 are formed by different patterning processes, respectively.

[0129] In this embodiment, the connection structure 101A between the cathodes 101 is a transparent conductive connection structure 101A, and the transparent conductive connection structure 101A is manufactured separately. That is to say, in this embodiment, a composition process is required to form an independent and insulated cathode 101, and a composition process is required to form a transparent conductive connection structure 101A connected to the cathode 101.

[0130] The material of the transparent conductive connection structure 101A may be selected from materials with high transparency such as ITO (indium tin oxide). The electrical connection between the cathodes 101 is achieved through the transparent conductive connection structure 101A, which can further improve the light transmittance of the display substrate.

[0131] The present disclosure also provides a display device.

[0132] In one embodiment, the display device includes the display panel of any one of the above display panel embodiments, and a camera is disposed in the light-transmitting area 11 .

[0133] Since the display device of this embodiment includes all the technical solutions of the above-mentioned display panel embodiment, it can at least achieve all the above-mentioned technical effects, which will not be described in detail here.

[0134] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A display panel, comprising a substrate, wherein the substrate comprises a display area and a functional area, the functional area comprises a light-transmitting area, the light-transmitting area comprises a plurality of pixel units, the pixel units are capable of emitting white light, each of the pixel units comprises at least one sub-pixel, each of the pixel units further comprises a cathode, the plurality of cathodes are mutually separated in the orthographic projection of the substrate, the orthographic projection of the effective light-emitting area of ​​each sub-pixel on the substrate is located within the range of the orthographic projection of the cathode of the corresponding pixel unit on the substrate, the display panel further comprises a connection structure, the connection structure is arranged in the same layer as the cathode, and different cathodes are connected through the connection structure; The positive projection of the anode of the sub-pixel included in the pixel unit on the substrate is located within the positive projection of the cathode of the pixel unit on the substrate; The orthographic projection of the edge of the anode on the substrate partially overlaps with the orthographic projection of the corresponding cathode on the substrate; In a region outside the region where the orthographic projection of the anode on the substrate overlaps with the orthographic projection of the corresponding cathode on the substrate, the orthographic projection of the edge of the cathode on the substrate extends along a straight line; The edges of the cathode are chamfered, and the chamfer of the edges of the cathode is greater than 30 degrees.

2. The display panel according to claim 1, wherein: The orthographic projection of the edge of the cathode on the substrate is separated from the orthographic projection of the effective light emitting area of ​​the corresponding sub-pixel on the substrate, and the edge of the cathode overlaps with the orthographic projection of the anode of the corresponding sub-pixel on the substrate.

3. The display panel according to any one of claims 1 to 2, wherein: The plurality of cathodes and the connection structure in the light-transmitting area form a mesh structure, the mesh structure includes a plurality of openings, each of the openings is surrounded by the cathode and the connection structure, and the cathode and the connection structure are made of the same material.

4. The display panel according to claim 3, wherein: The plurality of cathodes are arranged along a first direction to form cathode rows, and the plurality of cathode rows are arranged along a second direction. The angle between the first direction and the second direction is 80-100 degrees, and two adjacent cathode rows are staggered in the first direction.

5. The display panel according to claim 4, wherein: The functional area also includes a transition area and a pixel circuit area, the pixel circuit area is arranged around the light-transmitting area, the transition area is arranged between the pixel circuit area and the light-transmitting area, the transition area and the pixel circuit area share a cathode, and the positive projection of the cathode on the substrate is a solid figure in the transition area and the pixel circuit area.

6. The display panel according to claim 5, wherein: The display panel further includes a plurality of arc-shaped windings, the windings extending along the edge of the light-transmitting area, and the windings connected to the pixel circuits located in the pixel circuit area through routing lines located in the transition area.

7. The display panel according to claim 6, wherein: It also includes a semiconductor layer. In the transition region, the semiconductor layer includes a plurality of redundant patterns, and the redundant patterns are spaced apart and arranged in an array.

8. The display panel according to claim 7, wherein: It also includes a first gate layer located between the semiconductor layer and the anode layer, the first gate layer includes a plurality of first transfer lines located in the transition zone, the upper dimension of the first transfer lines in the second direction is larger than the dimension in the first direction, the plurality of first transfer lines are arranged along the first direction and are parallel to each other, and the orthographic projection of the first transfer lines on the substrate is separated from the orthographic projection of the redundant pattern on the substrate.

9. The display panel according to claim 8, wherein: It also includes a second gate layer located between the first gate layer and the anode layer, the second gate layer includes a plurality of second transfer lines located in the transition zone, the upper dimension of the second transfer line in the second direction is larger than the dimension in the first direction, the orthographic projection of the second transfer line on the substrate is separated from the orthographic projection of the redundant pattern on the substrate and the orthographic projection of the first transfer line on the substrate, and the ratio of the distance between two adjacent first transfer lines to the distance between two adjacent second transfer lines is 0.8-1.

2.

10. The display panel according to claim 9, wherein: It also includes an interlayer insulating layer located between the second gate layer and the anode layer. In the transition region, the interlayer insulating layer includes a plurality of vias, and an orthographic projection of each via on the substrate overlaps with an orthographic projection of one of the redundant patterns on the substrate.

11. The display panel according to claim 10, wherein: It also includes a first metal layer located between the interlayer insulating layer and the anode layer. In the transition zone, the first metal layer includes a plurality of third transfer lines. The size of the third transfer lines in the first direction is larger than the size in the second direction. The angle between the orthographic projection of the third transfer line on the substrate and the orthographic projection of the first transfer line on the substrate is 80-100 degrees. The orthographic projection of the third transfer line on the substrate is separated from the orthographic projection of the redundant pattern on the substrate.

12. The display panel according to claim 11, wherein: It also includes a transparent wire layer located between the first metal layer and the anode layer, the transparent wire layer includes a transparent routing and a first redundant routing extending along the first direction, the transparent routing is separated from the first redundant routing, and the transparent wire layer also includes a plurality of second redundant routings extending along the second direction.

13. The display panel according to claim 12, wherein: Each anode is connected to a transparent wiring through an anode hole, the transparent wiring is connected to a pixel circuit arranged in the pixel circuit area, and the first redundant wiring is connected to the second redundant wiring.

14. The display panel according to claim 1, wherein: The sub-pixels corresponding to each pixel unit include two green sub-pixels, one red sub-pixel and one blue sub-pixel, the two green sub-pixels are arranged along the second direction, and the effective light-emitting area of ​​the blue sub-pixel is located between the effective light-emitting areas of the two green sub-pixels in the second direction.

15. The display panel according to claim 14, wherein: The effective light-emitting areas of the two green sub-pixels substantially overlap with a center line along the second direction, and the effective light-emitting areas of the blue sub-pixel and the red sub-pixel are located on the same side of the center line.

16. A display device, comprising the display panel according to any one of claims 1 to 15, wherein the light-transmitting area is provided with a camera.

17. A method for manufacturing a display panel, for manufacturing the display panel according to any one of claims 1 to 15, the method comprising a step of forming a cathode, the step of forming a cathode comprising: forming a cathode material layer; Burning the cathode material layer by laser to pattern the cathode material layer; The residual particles of the cathode material layer are removed by plasma air knife.

18. The method according to claim 17, wherein: The method of using laser to burn the cathode material layer to pattern the cathode material layer includes: Placing a display substrate including a cathode material layer on a processing platform of a laser etching device; capturing the alignment mark on the display substrate using the laser etching device; According to the position of the alignment mark and the position of the cathode, the cathode material layer is burned by laser to pattern the cathode material layer to form an image of the cathode.

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