Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel comprises a substrate, a plurality of first signal lines and a plurality of second signal lines, wherein the first signal lines and the second signal lines are located on the substrate. The first signal line is located on the substrate and comprises a first lead and a first switching part, the first switching part is located in the line changing area, and the first lead extends to the line changing area from the display area to be connected with the first switching part. The second signal line is located on the substrate and comprises a second lead and a second switching part, the second switching part is located in the line changing area, and the second lead is connected with the second switching part and extends to the bending area from the line changing area. The layers where the first signal lines and the second signal lines are located are different, the first switching parts and the second switching parts correspond to each other and are connected with each other, the multiple first switching parts are arranged in two rows in the second direction intersecting with the first direction, the first direction is perpendicular to the direction from the line changing area to the bending area, the two rows of first switching parts are alternately arranged in the first direction, and the second direction is perpendicular to the direction from the line changing area to the bending area. And at least partial overlapping is realized in the second direction.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and more specifically, to a display panel and a display device. Background Technology

[0002] Organic light-emitting diodes (OLEDs) are organic thin-film electroluminescent devices. They have attracted great attention and are widely used in electronic display products due to their advantages such as simple fabrication process, low cost, low power consumption, high brightness, wide viewing angle, high contrast and flexible display capability. The structure of this electronic display product can be found in the relevant descriptions in patents CN118251982A, 202410864269.8, PCT / CN2024 / 098407, PCT / CN2024 / 102783, PCT / CN2024 / 098217, PCT / CN2024 / 099419, PCT / CN2024 / 099072, CN117979755A, CN117998900A, CN117062489A, CN117580403A, CN116583155A, CN116669477A, ​​CN117396039A, CN116669480A, CN116600606A, and CN117500332A, and will not be repeated here.

[0003] However, current electronic display products are limited by their structural design, making it difficult to further narrow the bezels to improve the full-screen display effect while ensuring product yield. Summary of the Invention

[0004] This disclosure provides a display panel having a display area and a non-display area located on at least one side of the display area. The non-display area includes a switching area and a bending area, with the switching area located between the display area and the bending area. The physical structure of the display panel includes a substrate and a plurality of first signal lines and a plurality of second signal lines located on the substrate. The first signal lines are located on the substrate and include a first lead and a first adapter portion. The first adapter portion is located in the switching area, and the first lead extends from the display area to the switching area to connect with the first adapter portion. The second signal lines are located on the substrate and include a second lead and a second adapter portion. The second adapter portion is located in the switching area, and the second lead is connected to the second adapter portion and extends from the switching area to the bending area. The first signal lines and the second signal lines are located on different layers. The first adapter portion and the second adapter portion correspond to each other and are connected to each other. The plurality of first adapter portions are arranged in two rows in a second direction intersecting a first direction. The first direction is perpendicular to the direction from the switching area to the bending area. The two rows of first adapter portions are arranged alternately along the first direction and at least partially overlap in the second direction.

[0005] In the above scheme, the staggered arrangement of the first transition sections can strengthen the structural strength of the switching area, so as to prevent the stress released when the bending area is bent from causing the switching area to bend, thereby protecting the signal lines in the switching area.

[0006] In one specific embodiment of the first aspect of this disclosure, the overlap dimension of the two rows of first transition portions in the second direction is greater than or equal to 50% of the distance between two adjacent first transition portions in the same row. This ensures a high degree of overlap between adjacent first transition portions, further strengthening the structural strength of the line-changing area.

[0007] In one specific embodiment of the first aspect of this disclosure, the orthographic projection of the first transition portion on the substrate at least partially overlaps with the orthographic projection of the corresponding second transition portion on the substrate. For example, further, the orthographic projection of the first transition portion on the substrate and the orthographic projection of the corresponding second transition portion on the substrate are conformal. This ensures the area of ​​the overlapping portion between the first and second transition portions, thereby guaranteeing the accuracy of the transition position and reducing the impedance at the transition position.

[0008] In one specific embodiment of the first aspect of this disclosure, the orthographic projection of the first adapter portion on the substrate coincides with the orthographic projection of the corresponding second adapter portion on the substrate.

[0009] In one specific embodiment of the first aspect of this disclosure, the first adapter includes a first end and a second end, the width of the first end being greater than the width of the second end. The first adapter is classified into a first type of adapter and a second type of adapter, and the first type of adapter and the second type of adapter are located in different rows. The first end of the first type of adapter faces the bending area, and the second end of the second type of adapter faces the bending area.

[0010] In the above scheme, by changing the shape of the first transition section, the first transition sections of different rows can be arranged in an alternating manner without changing the arrangement density of the first transition sections in the line-changing area (along the row direction).

[0011] In one specific embodiment of the first aspect of this disclosure, the straight line defined by the second end of the first type of transition portion passes through the second type of transition portion, and the straight line defined by the second end of the second type of transition portion passes through the first type of transition portion.

[0012] In one specific embodiment of the first aspect of this disclosure, from the first end to the second end, the first transition portion includes a first part and a second part arranged sequentially. The orthographic projection of the first part onto the substrate surface is a rectangle, and the orthographic projection of the second part onto the substrate surface is a trapezoid, with the base of the trapezoid connected to the rectangle.

[0013] In one specific embodiment of the first aspect of this disclosure, for the first type of transition portion in the same row, the straight line defined by the intersection of the first part and the second part passes through the second end of the first transition portion in another row. Thus, on different straight lines parallel to the direction of the row, the sum of the thicknesses of each first transition portion is approximately the same, thereby ensuring a uniform stress distribution in the switching area when bending in the bending region, and preventing signal line breakage due to bending in the switching area.

[0014] In one specific embodiment of the first aspect of this disclosure, the opposing side surfaces of the second portions of adjacent first transition portions are parallel, that is, the second portions included in the first transition portions of different rows are staggered, which is beneficial to the arrangement of the first transition portions and to the uniform distribution of stress during bending.

[0015] In one specific embodiment of the first aspect of this disclosure, the display panel may further include an insulating layer located between the layer containing the first signal line and the layer containing the second signal line. The insulating layer has a transition hole, and the first transition part is connected to the corresponding second transition part through the transition hole.

[0016] In one specific embodiment of the first aspect of this disclosure, the orthographic projection of the adapter hole on the substrate lies within the orthographic projection of the corresponding first adapter portion on the substrate, and the orthographic projection of the adapter hole on the substrate is conformal to the orthographic projection of the corresponding first adapter portion on the substrate. This allows for a larger overlap area between the first adapter portion and the second adapter portion, thereby reducing the impedance between the first adapter portion and the second adapter portion.

[0017] In one specific embodiment of the first aspect of this disclosure, a plurality of transition holes are provided between each first transition portion and the second transition portion, and the area of ​​the transition holes decreases sequentially from the first end to the second end of the first transition portion. This allows for a plurality of dispersed overlap points between the first transition portion and the second transition portion, which facilitates stress dispersion and avoids stress concentration between the first transition portion and the second transition portion.

[0018] In one specific embodiment of the first aspect of this disclosure, at least some of the transition holes corresponding to the first transition portion are staggered with at least some of the transition holes corresponding to adjacent first transition portions. Thus, by adjusting the arrangement of the transition holes, they can be arranged relatively evenly throughout the entire line-changing area, and the structural strength differences at different positions corresponding to the straight lines parallel to the row direction are minimized. This facilitates a relatively uniform stress distribution during bending, thereby reducing the risk of bending in the line-changing area.

[0019] In one specific embodiment of the first aspect of this disclosure, for the overlapping portions of adjacent first transition sections along the row direction, the trajectory of a straight line passing through the centroid of the transition hole corresponding to any first transition section and parallel to the row direction, in the region where the adjacent first transition section is located, lies outside the transition hole. This allows the transition holes to be more evenly distributed throughout the entire switching area, further reducing the risk of bending in the switching area.

[0020] In one specific embodiment of the first aspect of this disclosure, a straight line passing through the centroid of the adapter hole closest to the first end of the first adapter portion and parallel to the direction of the row is located between two adapter holes corresponding to adjacent first adapter portions.

[0021] In one specific embodiment of the first aspect of this disclosure, the shape of the adapter hole includes at least one of a circle, a triangle, a rectangle, and a polygon.

[0022] In one specific embodiment of the first aspect of this disclosure, the display panel may further include a pixel driving circuit located on a substrate. The pixel driving circuit is located in the display area and includes a thin film transistor, a capacitor, and circuit traces. The first signal line and the second signal line are respectively in the same layer and made of the same material as one of the circuit traces, the electrode of the capacitor, the gate electrode and the source / drain electrode in the thin film transistor.

[0023] In one specific embodiment of the first aspect of this disclosure, the display panel may further include a plurality of light-emitting devices located in the display area. The light-emitting devices are located on the side of the pixel driving circuit away from the substrate and are connected to the pixel driving circuit. The light-emitting devices include a first electrode, a light-emitting functional layer and a second electrode stacked sequentially on the pixel driving circuit.

[0024] In one specific embodiment of the first aspect of this disclosure, the display panel may further include an isolation structure located on the side of the pixel driving circuit away from the substrate, and including a plurality of isolation openings. Each isolation opening corresponds to a light-emitting device, with the light-emitting functional layer and second electrode of the light-emitting device located in the corresponding isolation opening, and the second electrode connected to the side surface of the isolation opening.

[0025] In the above scheme, the light-emitting device is fabricated based on the isolation structure, which eliminates the need to consider the alignment of each film layer, thereby reducing the gap between the light-emitting devices and increasing the pixel density (PPI) of the display panel. In this context, the arrangement density of the circuit structure in the display panel is further increased, which further increases the difficulty of narrowing the bezel in the non-display area of ​​the display panel. However, by adopting the above scheme of this disclosure, the risk of signal line breakage caused by bezel reduction in the line switching area can be reduced.

[0026] Optionally, the isolation structure includes a support portion and a crown portion, the support portion being located between the crown portion and the substrate, and the orthographic projection of the end of the support portion away from the substrate onto the substrate being located between the orthographic projection of the crown portion onto the substrate.

[0027] Optionally, the support portion is a conductive structure, and the second electrode overlaps with the side surface of the support portion. The support portion does not need to consider light transmission, thus allowing for a larger design thickness (greater than the second electrode). That is, the sheet resistance of the support portion is less than the sheet resistance of the second electrode. In this design, the support portion can be connected to the second electrode of the light-emitting device to achieve a common potential, thereby reducing the voltage drop generated on the second electrode.

[0028] In one specific embodiment of the first aspect of this disclosure, the display panel may further include a first encapsulation layer located on the side away from the substrate from the isolation structure and the light-emitting device, and including a plurality of encapsulation units. Each encapsulation unit corresponds to an isolation opening to encapsulate a light-emitting device, and encapsulation units corresponding to adjacent light-emitting devices emitting different colors are spaced apart. In the process of batch fabrication of light-emitting devices based on the isolation structure, the encapsulation unit is formed along with the corresponding light-emitting device, thereby encapsulating and protecting the previously formed light-emitting devices during the fabrication process (including etching) of the next batch of light-emitting devices.

[0029] A second aspect of this disclosure provides a display device that includes the display panel described in the first aspect. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the planar structure of a display panel provided in one embodiment of the present disclosure.

[0031] Figure 2 for Figure 1 An enlarged view of area S1 of the display panel shown.

[0032] Figure 3 for Figure 2 An enlarged view of a first signal line and a second signal line that are opposite each other in the structure shown.

[0033] Figure 4 for Figure 3 The schematic diagram of the planar structure on the other side of the structure shown mainly illustrates the planar structure of the second signal line.

[0034] Figure 5 for Figure 3 The structure shown is a cross-sectional view along M1-N1.

[0035] Figure 6 This is a cross-sectional view of a portion of the structure of a display panel under another design, provided in one embodiment of this disclosure, which is related to... Figure 5 Compare the structures shown.

[0036] Figure 7 This is a planar structural diagram of a portion of the display panel provided in one embodiment of the present disclosure under another design, which is consistent with... Figure 3 Compare the structures shown.

[0037] Figure 8 for Figure 1 An enlarged view of area S2 of the display panel shown.

[0038] Figure 9 for Figure 8 The diagram shows a cross-sectional view of the display panel along M2-N2 in one design.

[0039] Figure 10 for Figure 8 The diagram shows a cross-sectional view of the display panel along M2-N2 in another design. Figure 9 A bottom was added to the structure shown.

[0040] Figure 11 for Figure 8 The diagram shows a cross-sectional view of the display panel along M2-N2 in another design. Figure 9 A second and a third encapsulation layer were added to the structure shown.

[0041] Figures 12A to 12F A disclosed embodiment provides a method for forming such Figure 9 The diagram shows a process diagram of one method for manufacturing a display panel.

[0042] Explanation of reference numerals in the attached figures:

[0043] 10-Display panel; 11-Display area; 12-Non-display area; 12a-Cable switching area; 12b-Bending area; 13-Bonding area;

[0044] 100 - Substrate; 110 - Substrate; 130 - Circuit trace; 140 - Planarization layer; 150 - Thin film transistor; 151 - Active layer; 152 - Gate electrode; 153 - Gate insulating layer; 154 - Interlayer dielectric layer; 155 - Source / drain electrode; 160 - Buffer layer;

[0045] 200 - Light-emitting device; 210 - First electrode; 220 - Light-emitting functional layer; 221 - First functional layer; 222 - Light-emitting layer; 223 - Second functional layer; 230 - Second electrode;

[0046] 300 - Isolation structure; 301 - Isolation opening; 310 - Support; 320 - Crown; 330 - Bottom;

[0047] 410 - First signal line; 411 - First lead; 412 - First adapter; 412a - Type I adapter; 412b - Type II adapter; 4121 - First end; 4122 - Second end; 4123 - First part; 4124 - Second part; 420 - Second signal line; 421 - Second lead; 422 - Second adapter; 430 - Insulating layer; 431 - Adapter hole;

[0048] 500 - Pixel defining layer; 501 - Pixel opening; 500a - Pixel defining material layer;

[0049] 600 - Packaging structure; 610 - First packaging layer; 610a - First packaging film; 611 - Packaging unit; 620 - Second packaging layer; 630 - Third packaging layer;

[0050] 700 - Photoresist pattern. Detailed Implementation

[0051] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this specification.

[0052] Signal lines in a display panel converge at the peripheral area to connect with chips or external circuits. Furthermore, to reduce the bezel of the display panel and improve the visual effect of a full-screen display, at least a portion of the peripheral area of ​​the display panel is bent towards the back of the panel. During the manufacturing process of the display panel, various signal lines are produced, and these lines may reside in different layers. In actual design, these signal lines are converged to the same layer through a junction, and then pass through the bending area of ​​the display panel. This helps to control the stress surface of the signal lines converged to the same layer in the bending area (e.g., located on the neutral layer of the bending stress surface), thereby reducing the risk of damage to the signal lines during bending.

[0053] As display panel structures become more complex and the requirements for narrow bezels increase, the density of signal lines on the periphery of the display panel increases. Therefore, during connection, the connection points for signal lines are set to at least two rows to achieve connection between different signal lines in different rows. However, the width of the connection point is greater than the width of the signal line itself. This results in the gaps between adjacent rows containing only signal lines without a connection structure. This leads to uneven stress distribution in the signal line connection area during bending operations, making bending more likely, for example, at the gaps between adjacent rows. This severely compromises the yield of the signal line connection points, increasing signal line impedance and even causing short circuits.

[0054] Embodiments of this disclosure provide a display panel and a display device to at least solve the aforementioned technical problems. The display panel has a display area and a non-display area located on at least one side of the display area. The non-display area includes a switching area and a bending area, with the switching area located between the display area and the bending area. The physical structure of the display panel includes a substrate and a plurality of first signal lines and a plurality of second signal lines located on the substrate. The first signal lines are located on the substrate and include a first lead and a first adapter portion. The first adapter portion is located in the switching area, and the first lead extends from the display area to the switching area to connect with the first adapter portion. The second signal lines are located on the substrate and include a second lead and a second adapter portion. The second adapter portion is located in the switching area, and the second lead connects to the second adapter portion and extends from the switching area to the bending area. The first signal line and the second signal line are located on different layers. The first and second transition parts correspond to and are connected to each other. Multiple first transition parts are arranged in two rows in a second direction that intersects with the first direction. The first direction is perpendicular to the direction from the line switching area to the bending area. The two rows of first transition parts are arranged alternately in the first direction and at least partially overlap in the second direction. In this display panel, the staggered arrangement of the first transition parts can strengthen the structural strength of the line switching area to prevent the line switching area from bending due to the stress released when the bending area is bent, thereby protecting the signal lines in the line switching area.

[0055] The structure of the display panel and display device according to at least one embodiment of the present disclosure will now be described in detail with reference to the accompanying drawings. Furthermore, in these drawings, a spatial Cartesian coordinate system is established with the substrate in the display panel as a reference to more intuitively present the positional relationships of the relevant structures in the display panel. In this spatial Cartesian coordinate system, the X-axis and Y-axis are parallel to the surface of the substrate, and the Z-axis is perpendicular to the surface of the substrate.

[0056] like Figures 1 to 5 As shown, the display panel 10 has a display area 11 and a non-display area 12 located on at least one side of the display area 11. The non-display area 12 includes a line-changing area 12a and a bending area 12b, with the line-changing area 12a located between the display area 11 and the bending area 12b.

[0057] The physical structure of the display panel 10 includes a substrate 110 and multiple first signal lines 410 and multiple second signal lines 420 located on the substrate 110. The first signal lines 410 are located on the substrate 110 and include a first lead 411 and a first adapter 412. The first adapter 412 is located in the line-changing area 12a, and the first lead 411 extends from the display area 11 to the line-changing area 12a to connect with the first adapter 412. The second signal lines 420 are located on the substrate 110 and include a second lead 421 and a second adapter 422. The second adapter 422 is located in the line-changing area 12a, and the second lead 421 is connected to the second adapter 422 and extends from the line-changing area 12a to the bending area 12b. In subsequent assembly processes of the display panel, the bending area 12b is bent. During this process, the stress generated in the bending area 12b is released to the periphery and enters the line-changing area 12a.

[0058] like Figure 5 As shown, the first signal line 410 and the second signal line 420 are located on different layers. The first adapter 412 and the second adapter 422 correspond to each other and are connected to each other. Multiple first adapters 412 are connected in the first direction ( Figure 2 The direction of the X-axis intersects the second direction (in the middle). Figure 2 The first transition portions are arranged in two rows along the Y-axis direction. The first direction is perpendicular to the direction from 12a to the bending area 12b. The two rows of first transition portions are arranged alternately along the first direction and at least partially overlap in the second direction. Specifically, the first transition portions 412 are arranged in two rows, and the direction of the rows ( Figure 2 The X-axis direction (as shown in the image) is perpendicular to the Y-axis direction (from the switching area 12a to the bending area 12b). The first transition sections 412 in different rows are arranged alternately, and there exist straight lines (e.g., L1 to L4, especially L3 and L4) parallel to the row direction and passing through the first transition section 412 of one row, passing through the first transition section 412 of another row. The staggered arrangement of the first transition sections 412 strengthens the structural strength of the switching area 12a, preventing the stress released during bending of the bending area 12b from causing bending of the switching area 12a, thereby protecting the signal lines of the switching area 12a. For example, as... Figure 2 As shown, in the area of ​​line-changing zone 12a where the first transition section 412 and the second transition section 422 are arranged, any straight line parallel to the row direction either passes through all the first transition sections 412 (including the second transition section 422), such as lines L1 and L2; or passes through all the first transition sections 412 (including the second transition section 422) of one row and the first lead line 411 or the second lead line 421 of another row, such as lines L3 and L4. Thus, the area of ​​line-changing zone 12a where the first transition sections 412 and the second transition section 422 are arranged will not have areas of weak structural strength, thereby reducing the risk of bending.

[0059] It should be noted that, in the embodiments of this disclosure, the first direction and the second direction can be as follows: Figure 2 The shapes shown are perpendicular to each other, or they can be set to intersect but not perpendicular.

[0060] It should be noted that the bending area 12b will be bent to the back of the display panel 10 (the side opposite to the display side) in the final product. Therefore, the above-mentioned "vertical" means that before the bending area 12b of the display panel 10 is bent (in the flat state), the direction of the row is perpendicular to the direction from the line changing area 12a to the bending area 12b.

[0061] In the embodiments of this disclosure, the first lead 411 and the first adapter 412 are an integrated structure, that is, they are on the same layer and made of the same material; correspondingly, the second lead 421 and the second adapter 422 are also an integrated structure, that is, they are on the same layer and made of the same material.

[0062] In at least one embodiment of this disclosure, such as Figure 1 As shown, the display panel 10 may further include a bonding area 13, in which overlapping terminals are arranged. The second lead 421 of the second signal line 420 enters the bonding area 13 after passing through the bending area 12b to connect with the overlapping terminals. Through these overlapping terminals, it can be connected to a driver chip or peripheral circuitry (e.g., a flexible circuit board). The bending area 12b is located between the bonding area 13 and the display area 11, so that after bending, the bonding area 13 is bent to the back of the display panel.

[0063] It should be noted that, in at least one embodiment of this disclosure, in order to reduce the bending radius at the bending region 12b to further widen the border, the structure of the bending region 12b is specially designed. For example, the film layer where the signal line is located will be closer to the substrate 110 so that it is not on the same layer as the signal line in the line-changing region or the bonding region. In this way, the second lead 421 may be changed again after passing through the bending region 12b to connect to the bonding region 13. In this case, the line-changing region 12a mentioned in the above embodiments of this disclosure can be additionally provided between the bending region 12b and the bonding region 13, wherein the design structure of the signal line can be referenced simultaneously.

[0064] In at least one embodiment of this disclosure, such as Figure 2 As shown, the overlap dimension (distance from L1 to L2) of the two rows of first transition sections in the second direction is greater than or equal to 50% of the minimum spacing D between two adjacent first transition sections in the same row. In this way, a high degree of overlap can be ensured between adjacent first transition sections, so as to further enhance the structural strength of the line-changing area.

[0065] In at least one embodiment of this disclosure, such as Figures 2 to 5As shown, the orthographic projection of the first transition portion 412 on the substrate 110 at least partially overlaps with the orthographic projection of the corresponding second transition portion 422 on the substrate 110. For example, further, the orthographic projection of the first transition portion 412 on the substrate 110 and the orthographic projection of the corresponding second transition portion 422 on the substrate 110 are conformal. This ensures the area of ​​the overlapping portion of the first transition portion 412 and the second transition portion 422, thereby ensuring the accuracy of the transition position and reducing the impedance at the transition position. For example, further, as... Figures 2 to 5 As shown, the orthographic projection of the first adapter 412 on the substrate 110 coincides with the orthographic projection of the corresponding second adapter 422 on the substrate 110.

[0066] In embodiments of this disclosure, two projections are "conformal" if the two projections are substantially similar in shape or have the same shape (including the same size).

[0067] In at least one embodiment of this disclosure, such as Figure 2 and Figure 3 As shown, the first adapter 412 includes a first end 4121 and a second end 4122. The width of the first end 4121 is greater than the width of the second end 4122. The first adapter 412 is classified into a first type of adapter 412a and a second type of adapter 412b. The first type of adapter 412a and the second type of adapter 412b are arranged in different rows; that is, all the first type of adapters 412a are arranged in one row, and all the second type of adapters 412b are arranged in another row. The first end 4121 of the first type of adapter 412a faces the bending area 12b, and the second end 4122 of the second type of adapter 412b faces the bending area 12b. Thus, by changing the width of the first transition portion 412, the wider portion of the first type of transition portion 412a can be adjacent to the narrower portion of the second type of transition portion 412b, and the narrower portion of the first type of transition portion 412a can be adjacent to the wider portion of the second type of transition portion 412b, so that the first type of transition portion 412a and the second type of transition portion 412b can be interlaced with each other. That is, by changing the shape of the first transition portion 412, the arrangement density of the first transition portion 412 in the line-changing area 12a (along the row direction) can be changed, while allowing the first transition portions 412 in different rows to be arranged in an alternating manner.

[0068] In at least one embodiment of this disclosure, such as Figures 2 to 5 As shown, the straight line L1 defined by the second end 4122 of the first type of transition section 412a passes through the second type of transition section 412b, and the straight line L2 defined by the second end 4122 of the second type of transition section 412b passes through the first type of transition section 412a. In this way, the first transition section 412 can have the maximum arrangement density in the line changing area 12a without changing the width (dimension along the row direction) of the line changing area 12a.

[0069] In at least one embodiment of this disclosure, such as Figures 2 to 5 As shown, from the first end 4121 to the second end 4122, the first transition portion 412 includes a first part 4123 and a second part 4124 arranged in sequence. The orthographic projection of the first part 4123 on the surface of the substrate 110 is a rectangle, and the orthographic projection of the second part 4124 on the surface of the substrate 110 is a trapezoid, with the base of the trapezoid connected to the rectangle.

[0070] It should be noted that, in the embodiments disclosed herein, the specific shape of the first transition portion 412 is not limited, provided that the first transition portion 412 has two ends with unequal widths, and it can be designed according to actual needs. For example, the orthographic projection of the first portion 4123 onto the surface of the substrate 110 can also be a semicircle, etc., and the straight edge of the semicircle can be connected to the bottom edge of the trapezoidal second portion 4124.

[0071] In at least one embodiment of this disclosure, such as Figure 2 and Figure 3 As shown, for the first type of transition section 412a in the same row, the straight line L2 defined by the intersection of the first part 4123 and the second part 4124 passes through the second end 4122 of the first transition section 412 (second type of transition section 412b) in another row. Correspondingly, for the second type of transition section 412b in the same row, the straight line L1 defined by the intersection of the first part 4123 and the second part 4124 passes through the second end 4122 of the first transition section 412 (first type of transition section 412a) in another row. Thus, on different straight lines parallel to the direction of the row, the sum of the thicknesses of each first transition section 412 is approximately the same, for example... Figure 2 The sum of the thicknesses of the first transition portions 412 on the straight lines L1 to L4 are equal, so that when bending occurs in the bending area 12b, the stress distribution in the line switching area 12a is uniform, so as to avoid the occurrence of signal line breakage due to bending in the switching area.

[0072] In at least one embodiment of this disclosure, such as Figure 2 and Figure 3 As shown, the opposing side surfaces of the second portions 4124 of adjacent first transition portions 412 are parallel, that is, the second portions 4124 included in the first transition portions 412 of different rows are staggered, which is beneficial to the arrangement of the first transition portions 412 and to the uniform distribution of stress during bending.

[0073] In at least one embodiment of this disclosure, such as Figures 2 to 5As shown, the display panel may also include an insulating layer 430, which is located between the layer where the first signal line 410 is located and the layer where the second signal line 420 is located. An adapter hole 431 is provided in the insulating layer 430, and the first adapter part 412 is connected to the corresponding second adapter part 422 through the adapter hole 431.

[0074] It should be noted that, in the embodiments of this disclosure, the vertical order of the layer where the first signal line 410 is located and the layer where the second signal line 420 is located is not limited, and can be selected according to actual design requirements. For example, in some embodiments of this disclosure, such as Figure 5 As shown, the layer containing the second signal line 420 is located between the layer containing the first signal line 410 and the substrate 110; or, in other embodiments of this disclosure, such as Figure 6 As shown, the layer containing the first signal line 410 is located between the layer containing the second signal line 420 and the substrate 110.

[0075] In the embodiments of this disclosure, the number of adapter holes 431 corresponding to each first adapter part 412 is not limited, and can be selected according to actual design requirements.

[0076] In some embodiments of this disclosure, such as Figure 7 As shown, each first transition portion 412 corresponds to one transition hole 431. For example, the orthographic projection of the transition hole 431 on the substrate 110 lies within the orthographic projection of the corresponding first transition portion 412 on the substrate, and the orthographic projection of the transition hole 431 on the substrate 110 is conformal to the orthographic projection of the corresponding first transition portion 412 on the substrate. In this way, a large overlap area can be made between the first transition portion 412 and the second transition portion 422, thereby reducing the impedance between the first transition portion 412 and the second transition portion 422.

[0077] In other embodiments of this disclosure, please refer to [the relevant documentation]. Figure 2 and Figure 3 A plurality of transition holes 431 are provided between each first transition portion 412 and second transition portion 422, and the area of ​​the transition holes 431 decreases sequentially from the first end 4121 to the second end 4122 of the first transition portion 412. In this way, multiple overlapping points are distributed between the first transition portion 412 and the second transition portion 422, which is conducive to stress dispersion and avoids the problem of stress concentration between the first transition portion 412 and the second transition portion 422.

[0078] In the case where each first adapter corresponds to multiple adapter holes 431, the diameter (or area) of the adapter hole 431 can be designed according to the actual process requirements, and this disclosure does not impose any limitations on it. For example, in some embodiments of this disclosure, the diameter of the adapter hole 431 can be from 5 micrometers to 15 micrometers.

[0079] When each first adapter portion corresponds to multiple adapter holes 431, the number of adapter holes 431 can be designed according to the actual process requirements, and this disclosure does not impose any limitations on this. For example, in some embodiments of this disclosure, the number of adapter holes 431 corresponding to each first adapter portion can be 3 to 6. Figure 2 and Figure 3 (4 are shown in the image).

[0080] In at least one embodiment of this disclosure, such as Figure 2 As shown, at least some of the transition holes 431 corresponding to the first transition portion 412 are staggered with at least some of the transition holes 431 corresponding to adjacent first transition portions 412. In this way, by adjusting the arrangement of the transition holes 431, the transition holes 431 can be arranged relatively evenly throughout the entire line-changing area 12a, and the structural strength differences at different positions corresponding to the straight lines parallel to the row direction can be minimized. This is beneficial for a relatively uniform distribution of stress during bending, thereby reducing the risk of bending in the line-changing area 12a.

[0081] In at least one embodiment of this disclosure, such as Figure 2 As shown, for the overlapping portions of adjacent first transition sections 412 along the row direction, a straight line passing through the centroid of the transition hole 431 corresponding to any first transition section 412 and parallel to the row direction, will have a trajectory outside the transition hole 431 in the region where the adjacent first transition section 412 is located. For example, for the row where the first type of transition section 412a is located, the trajectory of the straight line L3 determined by the centroid of the transition holes 431 in some rows falls outside the transition hole 431 corresponding to the second type of transition section 412b; correspondingly, for the row where the second type of transition section 412b is located, the trajectory of the straight line L4 determined by the centroid of the transition holes 431 in some rows falls outside the transition hole 431 corresponding to the first type of transition section 412a. In this way, the transition holes 431 can be more evenly distributed throughout the entire switching area 12a, thereby further reducing the risk of bending in the switching area 12a.

[0082] In at least one embodiment of this disclosure, such as Figure 2As shown, a straight line passing through the centroid of the adapter hole 431 closest to the first end 4121 of the first adapter 412 and parallel to the direction of the row is located between the two adapter holes 431 corresponding to adjacent first adapters 412. For example, for the adapter hole 431 corresponding to the first type of adapter 412a, the straight line L3 determined by the centroid of the adapter hole 431 closest to the first end 4121 is located between the two adapter holes 431 corresponding to adjacent second type of adapter 412b; correspondingly, for the adapter hole 431 corresponding to the second type of adapter 412b, the straight line L4 determined by the centroid of the adapter hole 431 closest to the first end 4121 is located between the two adapter holes 431 corresponding to adjacent first type of adapter 412a.

[0083] In embodiments of this disclosure, when the first adapter portion 412 corresponds to multiple adapter holes 431, the shape of the adapter holes 431 is not limited and can be designed according to actual needs. For example, in at least one embodiment of this disclosure, the shape of the adapter hole 431 may include a circle. Figure 2 (as shown in the diagram), triangles, rectangles, polygons, etc.

[0084] The structure of the first and second signal lines in the switching area has been explained above. Below, the structure of the display area of ​​the display panel will be introduced to clarify the relationship between the structure of the non-display area and the display area of ​​the display panel.

[0085] In at least one embodiment of this disclosure, such as Figure 8 and Figure 9 As shown, sub-pixels (also known as sub-pixels, etc.) can be arranged in the display area 11, such as P1, P2, and P3 sub-pixels. Adjacent sub-pixels with different emitted light colors constitute a pixel (also known as a pixel unit, large pixel, etc.). The arrangement density of this pixel in the display area 11 represents the pixel density PPI.

[0086] The physical structure of the display panel may include a substrate 100, which includes a substrate 110 and a pixel driving circuit located on the substrate 110. The pixel driving circuit is located in the display area 11 and includes a thin film transistor 150, a capacitor, and a circuit trace 130. The first signal line 410 and the second signal line 420 are respectively in the same layer and made of the same material as one of the circuit trace 130, the electrode of the capacitor, the gate electrode 152 and the source / drain electrode 155 in the thin film transistor 150.

[0087] For example, the thin-film transistor 150 includes an active layer 151, a gate insulating layer 153, a gate electrode 152, an interlayer dielectric layer 154, and source / drain electrodes 155 disposed on the substrate 110. For example, a capacitor (referred to as C) may also be disposed on the substrate 110. The thin-film transistor 150 and the capacitor (C) can constitute a pixel driving circuit, which can be formed in various forms such as 7T1C (i.e., 7 transistors (TFTs) and 1 capacitor (C)), 8T1C, or 8T2C. The pixel driving circuit is connected to the light-emitting device 200 in the display functional layer to control the switching state and brightness of the light-emitting device 200.

[0088] For example, the substrate 100 may also include a planarization layer 140, with circuit traces 130 located between the thin-film transistor 150 and the planarization layer 140. The planarization layer 140 is used to planarize a surface portion of the substrate 100 for the placement of other structures (such as the first electrode 210 of the light-emitting device 200 described below).

[0089] In at least one embodiment of this disclosure, such as Figure 8 and Figure 9 As shown, the display panel may also include a plurality of light-emitting devices 200 located in the display area. The light-emitting devices 200 are located on the side of the pixel driving circuit away from the substrate 110 and are connected to the pixel driving circuit. The light-emitting devices 200 include a first electrode 210, a light-emitting functional layer 220 and a second electrode 230 stacked sequentially on the pixel driving circuit.

[0090] For example, the first electrode 210 can be an anode, and the second electrode 230 can be a cathode.

[0091] For example, the light-emitting functional layer 220 may further include a first functional layer 221, a light-emitting layer 222, and a second functional layer 223, which are sequentially stacked on the first electrode 210. The first functional layer 221 may include a hole injection layer, a hole transport layer, an electron blocking layer, etc. The second functional layer 223 may include an electron injection layer, an electron transport layer, a hole blocking layer, etc.

[0092] It should be noted that the first electrode 210 can also be set as a cathode and the second electrode 230 as an anode. In this case, the positions of the first functional layer 221 and the second functional layer 223 need to be interchanged.

[0093] In the display, some functional film layers in the light-emitting device 200 (such as the light-emitting functional layer 220 and the second electrode 230) can be formed by vapor deposition. However, each light-emitting device 200 has multiple functional film layers, and the materials of some functional film layers (such as the light-emitting layer) in light-emitting devices that emit different light are different. Therefore, when these functional film layers are vapor deposited through a mask (such as a fine mask), multiple alignments are required. In order to solve the position offset problem caused by alignment accuracy error, sufficient space (safety margin related to alignment error) needs to be reserved between different light-emitting devices to ensure that the position of the actual light-emitting area of ​​the light-emitting device can have a certain overlap with the design position (design area). This is equivalent to compressing the design area of ​​the light-emitting area of ​​the light-emitting device, which not only limits the light-emitting area of ​​the light-emitting device, but also prevents the arrangement density of the light-emitting device from being further increased, thus making it difficult to further improve the PPI (pixel density) of the display panel.

[0094] In embodiments of this disclosure, an isolation structure can be provided at the gaps between the light-emitting devices to separate the functional film layers of adjacent light-emitting devices. Thus, in the evaporation process of the functional film layers, only the entire display panel needs to be evaporated, without the need to individually prepare the functional film layer for each light-emitting device using a mask. This process does not require consideration of alignment accuracy during evaporation, allowing for a smaller gap design between the light-emitting devices to increase the PPI (the principle of which can be found in the following section). Figures 12A to 12F (Related descriptions in the relevant embodiments).

[0095] It should be noted that in scenarios where light-emitting devices are fabricated using an isolation structure, the density of circuit structures (including signal lines) in the display panel is further increased, which further increases the difficulty of narrowing the bezel in the non-display area of ​​the display panel. However, by adopting the above-described solution of this disclosure, the risk of signal line breakage caused by bezel reduction in the line-changing area 12a can be reduced. Therefore, the structure of the line-changing area presented by the above-described solution of this disclosure is particularly important for the bezel-narrowing design of display panels with isolation structures.

[0096] Below, a brief description of the display panel with an isolation structure, as well as the specific structure and working principle of the isolation structure, will be provided through at least one embodiment.

[0097] In at least one embodiment of this disclosure, such as Figure 9As shown, the display panel may further include an isolation structure 300, located on the side of the pixel driving circuit away from the substrate 110, and including multiple isolation openings 301. Each isolation opening 301 corresponds to a light-emitting device 200, with the light-emitting functional layer 220 and the second electrode 230 of the light-emitting device 200 located within the corresponding isolation opening 301, and the second electrode 230 connected to the side surface of the isolation opening 301. Thus, by fabricating the light-emitting device 200 based on the isolation structure 300, the alignment of each film layer does not need to be considered, thereby reducing the gap between the light-emitting devices 200 and increasing the pixel density (PPI) of the display panel. Furthermore, the second electrodes 230 of multiple light-emitting devices 200 are connected to each other through the isolation structure 300 to act as a common electrode, thereby alleviating the voltage drop problem generated when driving the second electrode 230.

[0098] In at least one embodiment of this disclosure, such as Figure 9 As shown, the isolation structure 300 includes a support portion 310 and a crown portion 320. The support portion 310 is located between the crown portion 320 and the substrate 110. The orthographic projection of the end of the support portion 310 away from the substrate 110 onto the substrate 110 lies between the orthographic projection of the crown portion 320 onto the substrate 110. Thus, the width of the crown portion 320 is greater than the width of the upper end of the support portion 310. During the fabrication of the light-emitting device 200, the isolation effect of the isolation structure 300 on the light-emitting functional layer 220 can be improved, thereby reducing the risk of current crosstalk between different light-emitting devices 200.

[0099] In at least one embodiment of this disclosure, such as Figure 9 As shown, the support portion 310 is a conductive structure, and the second electrode 230 overlaps with the side surface of the support portion 310. The support portion 310 is designed without considering light transmission, thus allowing for a larger design thickness (greater than the second electrode 230). That is, the sheet resistance of the support portion 310 is less than the sheet resistance of the second electrode 230. The support portion 310 can be connected to the second electrode 230 of the light-emitting device 200 to achieve a common potential, thereby reducing the voltage drop generated on the second electrode 230.

[0100] In at least one embodiment of this disclosure, such as Figure 9 As shown, the orthographic projection of the surface of the support portion 310 away from the substrate 100 onto the substrate 100 lies within the orthographic projection of the surface of the support portion 310 facing the substrate 100 onto the substrate 100. Thus, the cross-section of the portion of the support portion 310 located between adjacent isolation openings 301 is approximately trapezoidal, possessing relatively inclined side surfaces. This facilitates the deposition of the edge portion of the second electrode 230 on the side surface of the support portion 310, increasing the thickness of the portion where the second electrode 230 contacts the support portion 310, thereby reducing the impedance at the connection between the support portion 310 and the second electrode 230.

[0101] In at least one embodiment of this disclosure, such as Figure 9 As shown, the orthographic projection of the support portion 310 on the substrate 100 lies within the orthographic projection of the crown portion 320 on the substrate 100. Thus, the isolation structure 300 has an overall shape that is wider at the top and narrower at the bottom. Therefore, during the evaporation process of some film layers in the light-emitting device 200 (such as the light-emitting functional layer 220 and the second electrode 230 mentioned in the above embodiment), by controlling the evaporation angle of each film layer, under the blocking effect of the isolation structure 300, it is possible to ensure that the edge of a part of the film layer (such as the second electrode 230 mentioned above) can be connected to the conductive structure of the isolation structure 300 (such as the support portion 310), while preventing another part of the film layer (such as the light-emitting functional layer mentioned above or the film layer including the hole material, i.e., the first functional layer 221) from contacting the isolation structure 300. Thus, while blocking a part of the film layer (including electrical blocking, so that the light-emitting functional layer of adjacent light-emitting devices or some of the film layers therein will not be directly or indirectly electrically connected), it is ensured that another part of the film layer (such as the second electrode 230 mentioned above) can be connected to the conductive structure of the isolation structure 300.

[0102] In at least one embodiment of this disclosure, such as Figure 10 As shown, the isolation structure 300 also includes a bottom 330 located between the support portion 310 and the substrate 100. The orthographic projection of the surface of the support portion 310 facing the substrate 100 onto the substrate 110 lies within the orthographic projection of the bottom 330 onto the substrate 100. For example, the bottom 330 is a conductive structure, and the second electrode 230 is electrically connected to the portion of the surface of the bottom 330 facing away from the substrate 110 that is not covered by the support portion 310. The second electrode 230 is more easily deposited on the surface area of ​​the bottom 330 facing away from the substrate 110 than on the side surface of the support portion 310, thereby reducing the impedance at the connection between the second electrode 230 and the isolation structure 300.

[0103] In at least one embodiment of this disclosure, such as Figure 10 As shown, the orthographic projection of the bottom 330 onto the substrate 110 lies within the orthographic projection of the crown 320 onto the substrate 110. Thus, in the process of forming the light-emitting device 200, by controlling the deposition angle of the vapor-deposited material, a portion of the light-emitting functional layer 220 of the light-emitting device 200 (e.g., a hole-type film layer) is spaced apart from the bottom 330 (or has a small contact area), thereby connecting the second electrode 230 of the light-emitting device 200 to the bottom 330. This reduces or eliminates lateral crosstalk problems while also lowering the impedance between the second electrode 230 and the isolation structure 300.

[0104] For example, the bottom 330, the support 310, and the crown 320 can be made of molybdenum, aluminum, and titanium, respectively, or titanium, aluminum, and titanium, respectively. During etching, the film formed by these materials can form a film such as... Figure 10 The isolation structure 300 is shown.

[0105] In at least one embodiment of this disclosure, such as Figure 10 As shown, the display panel may further include a pixel defining layer 500, at least a portion of which is located in the display area and between the substrate 100 and the isolation structure 300. In the display area 11, the pixel defining layer 500 includes pixel openings 501 corresponding to the isolation openings 301, the pixel openings 501 communicating with their respective isolation openings 301, and at least a portion of the light-emitting functional layer 220 of the light-emitting device 200 and the second electrode 230 located in the corresponding isolation openings 301 and the pixel openings 501. The pixel defining layer 500 serves to space the first electrode 210 and the isolation structure 300 to avoid short circuits.

[0106] In at least one embodiment of this disclosure, the pixel defining layer 500 is an inorganic film layer. In the process of fabricating the light-emitting device 200 based on the isolation structure 300, the pixel defining layer 500 does not need to be thick enough to accommodate the light-emitting device 200, which is beneficial for the thinner and lighter design of the display panel. In addition, as an inorganic film layer, the pixel defining layer 500 can have a high bonding strength with the isolation structure 300 and the first electrode 210, thereby reducing the risk of the isolation structure 300 and the first electrode 210 falling off. Furthermore, the inorganic film layer has high density and good barrier effect against water and gas, so as to encapsulate and protect structures such as thin-film transistors 150 in the substrate 100.

[0107] In at least one embodiment of this disclosure, such as Figure 10 As shown, the orthographic projection of the pixel opening 501 on the substrate 100 is located within the orthographic projection of the first electrode 210 of the corresponding light-emitting device 200 on the substrate 100, and the edge portion of the first electrode 210 is located between the pixel defining layer 500 and the substrate 100.

[0108] In at least one embodiment of this disclosure, such as Figure 10 As shown, the display panel may further include a first encapsulation layer 610, which is located on the side of the isolation structure 300 and the light-emitting device 200 away from the substrate 110, and includes multiple encapsulation units 611. Each encapsulation unit 611 corresponds to an isolation opening 301 to encapsulate a light-emitting device 200. Encapsulation units 611 corresponding to adjacent light-emitting devices 200 with different emitting colors are spaced apart. In the process of batch fabricating the light-emitting devices 200 based on the isolation structure 300, the encapsulation unit 611 is formed along with the corresponding light-emitting device 200, thereby encapsulating and protecting the previously formed light-emitting devices 200 in the fabrication process (including etching) of the next batch of light-emitting devices 200.

[0109] It should be noted that the light-emitting devices 200 that emit different colors of light are manufactured independently, but the film layers (evaporated film layers, such as light-emitting functional layers, etc.) in each light-emitting device 200 are deposited on the entire display panel during the evaporation process. For example, taking the sequential fabrication of light-emitting devices 200 corresponding to sub-pixels P1, P2, and P3 as an example, when fabricating the light-emitting device 200 corresponding to sub-pixel P1, a light-emitting device 200 corresponding to sub-pixel P1 is formed in each isolation opening 301. A first encapsulation layer 610 is fabricated on the display panel to cover the light-emitting device 200 corresponding to sub-pixel P1. Then, the first encapsulation layer 610, the second electrode, and the light-emitting functional layer in some isolation openings 301 (used in the final product to form the light-emitting devices 200 corresponding to sub-pixels P2 and P3) are removed. During this process, the first encapsulation layer 610 is used to protect the light-emitting devices 200 in other isolation openings 301 (used in the final product to form the light-emitting device 200 corresponding to sub-pixel P1). Based on this method, the light-emitting devices 200 corresponding to sub-pixels P2 and P3 are fabricated sequentially, ultimately forming a display panel as shown in the image. Figure 10 The first encapsulation layer 610 shown, that is, the first encapsulation layer 610 on the entire display panel, is obtained by multiple processes. The first encapsulation layer 610 is also formed to include multiple encapsulation units 611 spaced apart from each other. Accordingly, the encapsulation units 611 corresponding to adjacent light-emitting devices 200 that emit different colors are spaced apart from each other.

[0110] It should be noted that in the embodiments of this disclosure, the fabrication order of the light-emitting devices 200 corresponding to the three types of sub-pixels P1, P2, and P3 is not limited. It can be designed according to the actual process requirements. For example, the fabrication process can also be implemented based on the order of the light-emitting devices 200 corresponding to the sub-pixels P3, P2, and P1.

[0111] In at least one embodiment of this disclosure, such as Figure 11As shown, the display panel further includes a second encapsulation layer 620 and a third encapsulation layer 630 covering the first encapsulation layer 610. The second encapsulation layer 620 is located between the first encapsulation layer 610 and the third encapsulation layer 630, and the third encapsulation layer 630 is located on the side of the second encapsulation layer 620 facing away from the substrate 110 (or substrate 100). The first encapsulation layer 610, the second encapsulation layer 620, and the third encapsulation layer 630 constitute an encapsulation structure 600. Optionally, the second encapsulation layer 620 is a planarization layer. For example, the second encapsulation layer 620 is an organic film layer, and the third encapsulation layer 630 is an inorganic film layer. For example, the second encapsulation layer 620 and the third encapsulation layer 630 are continuous film layers. The second encapsulation layer 620 can improve the flatness of the display panel surface, so as to facilitate the placement of other components on the encapsulation layer. In addition, the second encapsulation layer 620 can have a certain degree of flexibility to relieve the stress of the first encapsulation layer 610 and the third encapsulation layer 630, thereby improving the reliability of the display panel and making it more suitable for application in the field of flexible displays. Furthermore, the third encapsulation layer 630 has high density and a high barrier effect against water, oxygen, etc., and the third encapsulation layer 630 has higher strength, so as to facilitate the fabrication of other components (such as touch-related structures, optical films, etc.) on it.

[0112] Below, in conjunction with Figures 12A to 12F right Figure 9 The fabrication process of the display panel is described to visually demonstrate the fabrication method of the display panel and the principle that the isolation structure can increase the pixel density (PPI).

[0113] like Figure 12A As shown, a substrate 100 is provided, and a first electrode 210 arranged in an array is formed on the substrate 100; then, a pixel defining material layer 500a is deposited on the substrate 100 on which the first electrode 210 is formed.

[0114] like Figure 12B As shown, a first material layer and a second material layer are formed on the pixel defining material layer 500a. A patterning process is applied to the first and second material layers so that the first material layer is formed as a support portion 310 and the second material layer is formed as a crown portion 320. The support portion 310 and the crown portion 320 define an isolation opening 301 and constitute an isolation structure 300. For example, the material of the first material layer can be aluminum, and the material of the second material layer can be titanium. The specific structure of the isolation structure 300 can be found in the relevant descriptions in the foregoing embodiments, and will not be repeated here.

[0115] In embodiments of this disclosure, the patterning process can be a photolithography patterning process, which may include, for example, coating a structural layer to be patterned with photoresist, exposing the photoresist using a photomask, developing the exposed photoresist to obtain a photoresist pattern, etching the structural layer using the photoresist pattern (optionally wet or dry etching), and then optionally removing the photoresist pattern. It should be noted that when the material of the structural layer (e.g., the photoresist pattern 700 described below) includes photoresist, the structural layer can be directly exposed using a photomask to form the desired pattern.

[0116] It should be noted that if the corrosion resistance of the second material layer (e.g., titanium) is greater than that of the first material layer (e.g., aluminum), the etching rate of the first material layer will be greater than that of the second material layer. This will result in the crown 320 having a wider width than the support 310, thus forming a structure as described above. Figure 12B The structure shown.

[0117] like Figure 12C As shown, a patterning process is performed on the pixel defining material layer 500a to form pixel openings 501 at the locations of partial isolation openings 301, thus forming a pixel defining layer 500. In this process, the pixel defining layer 500 is still present at the partial isolation openings 301 to protect the underlying first electrode 210 in subsequent etching processes.

[0118] It should be noted that, in cases such as Figure 12E In the steps shown, a photolithography patterning process can be used to form the pixel opening 501. In this process, an isolation structure 300 can also be used to expose the photoresist, thereby precisely controlling the formation position of the pixel opening 501.

[0119] like Figure 12D As shown, light-emitting functional materials and electrode materials are vapor-deposited on the substrate 100 to form light-emitting devices 200 (light-emitting devices corresponding to sub-pixels P1) in each isolation opening 301 of the isolation structure 300. No mask is used in this vapor deposition process; therefore, the vapor-deposited material is also deposited on the crown 320. It should be noted that in the actual process, the vapor-deposited material is deposited on the upper surface and sidewalls of the crown 320 away from the substrate 100 (not shown in the figure). Then, a first encapsulation film 610a is deposited to cover the light-emitting devices 200 and the isolation structure 300. All light-emitting devices 200 formed in this process are light-emitting devices corresponding to sub-pixels P1.

[0120] like Figure 12EAs shown, a photoresist is formed (e.g., coated) on a substrate 100 on which a first encapsulation film 610a is formed, and then a patterning process is performed on it to form a photoresist pattern 700, which only covers a portion of the isolation opening 301 of the isolation structure 300.

[0121] like Figure 12F As shown, the surface of the display panel is etched using the photoresist pattern 700 as a mask to remove the first encapsulation film 610a, electrode material and light-emitting material not covered by the photoresist pattern 700. The remaining part of the first encapsulation film 610a forms the encapsulation unit 611 of the first encapsulation layer 610. Then the residual photoresist pattern 700 is removed.

[0122] After the process is completed, a light-emitting device 200 (the light-emitting device corresponding to sub-pixel P1) and a packaging unit 611 corresponding to the light-emitting device 200 are formed at a partial isolation opening 301 in the display area.

[0123] Repeat the above Figures 12D to 12F The steps are as follows: to form light-emitting devices 200 corresponding to sub-pixel P2 and light-emitting devices 200 corresponding to sub-pixel P3 respectively in other isolation openings 301, and to form as shown in the figure. Figure 8 and Figure 9 The display panel shown.

[0124] At least one embodiment of this disclosure provides a display device, which may include the display panel in the above embodiments or a display panel obtained by the manufacturing method in the above embodiments. For example, the display device may include structures such as optical films (e.g., microlenses, polarizers), cover plates, etc., disposed on the light-emitting side of the display panel.

[0125] For example, the display device can be any product or component with a display function, such as a television, digital camera, mobile phone, watch, tablet computer, laptop computer, or navigator.

[0126] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0127] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A display panel, characterized in that, The display panel includes a display area and a non-display area located on at least one side of the display area, wherein the non-display area includes a transition area and a bend area, the transition area being located between the display area and the bend area, and the display panel includes: Substrate; Multiple first signal lines, located on the substrate, include first leads and first adapters, the first adapters being located in the switching area, and the first leads extending from the display area to the switching area to connect with the first adapters; and Multiple second signal lines are located on the substrate, including second leads and second transition portions. The second transition portions are located in the line switching area, and the second leads are connected to the second transition portions and extend from the line switching area to the bending area. The first signal line and the second signal line are located on different layers; the first adapter and the second adapter correspond to each other and are connected to each other. Multiple first transition sections are arranged in two rows in a second direction that intersects the first direction. The first direction is perpendicular to the direction from the line-changing area to the bending area. The two rows of first transition sections are arranged alternately along the first direction and at least partially overlap in the second direction.

2. The display panel according to claim 1, characterized in that, The overlap dimension of the two rows of first transition portions in the second direction is greater than or equal to 50% of the spacing between two adjacent first transition portions in the same row.

3. The display panel according to claim 2, characterized in that, The orthographic projection of the first adapter portion on the substrate at least partially overlaps with the orthographic projection of the corresponding second adapter portion on the substrate, and The orthographic projection of the first adapter on the substrate is conformal to the orthographic projection of the corresponding second adapter on the substrate.

4. The display panel according to any one of claims 1 to 3, characterized in that, The first adapter includes a first end and a second end, wherein the width of the first end is greater than the width of the second end. The first transition section is classified into a first type of transition section and a second type of transition section. The first type of transition section and the second type of transition section are located in different rows, and The first end of the first type of adapter faces the bending area, and the second end of the second type of adapter faces the bending area.

5. The display panel according to claim 4, characterized in that, The straight line defined by the second end of the first type of adapter passes through the second type of adapter, and the straight line defined by the second end of the second type of adapter passes through the first type of adapter.

6. The display panel according to claim 4, characterized in that, From the first end to the second end, the first transition portion includes a first part and a second part arranged sequentially. The first part is projected onto the surface of the substrate as a rectangle, and the second part is projected onto the surface of the substrate as a trapezoid, with the base of the trapezoid connected to the rectangle.

7. The display panel according to claim 6, characterized in that, For the first type of transition section in the same row, the straight line defined by the intersection of the first part and the second part passes through the second end of the first transition section in another row.

8. The display panel according to claim 7, characterized in that, The opposing side surfaces of the second portions of the adjacent first transition portions are parallel.

9. The display panel according to claim 4, characterized in that, It also includes an insulating layer, wherein the insulating layer is located between the layer containing the first signal line and the layer containing the second signal line. The insulating layer is provided with a transition hole, and the first transition part is connected to the corresponding second transition part through the transition hole.

10. The display panel according to claim 9, characterized in that, The orthographic projection of the adapter hole on the substrate is located within the orthographic projection of the corresponding first adapter portion on the substrate, and the orthographic projection of the adapter hole on the substrate is conformal to the orthographic projection of the corresponding first adapter portion on the substrate.

11. The display panel according to claim 9, characterized in that, A plurality of the aforementioned adapter holes are provided between each of the first adapter portion and the second adapter portion, and From the first end of the first adapter portion to the second end, the area of ​​the adapter hole decreases sequentially.

12. The display panel according to claim 11, characterized in that, At least some of the adapter holes on the first adapter portion are staggered with at least some of the adapter holes on adjacent first adapter portions.

13. The display panel according to claim 12, characterized in that, For the overlapping portions along the row direction in adjacent first transition sections, and A straight line passing through the centroid of the transition hole corresponding to any of the first transition parts and parallel to the direction of the row, has a trajectory outside the transition hole in the region where the adjacent first transition parts are located.

14. The display panel according to claim 13, characterized in that, A straight line passing through the centroid of the adapter hole closest to the first end of the first adapter portion and parallel to the direction of the row is located between the two adapter holes corresponding to adjacent first adapter portions.

15. The display panel according to claim 11, characterized in that, The shape of the adapter hole includes at least one of the following: circle, triangle, rectangle, and polygon.

16. The display panel according to any one of claims 1 to 3, characterized in that, It also includes a pixel driving circuit located on the substrate. The pixel driving circuit is located in the display area and includes a thin-film transistor, a capacitor, and circuit traces. The first signal line and the second signal line are respectively in the same layer and made of the same material as the circuit traces, the electrode of the capacitor, the gate electrode and the source / drain electrode of the thin-film transistor.

17. The display panel according to claim 16, characterized in that, It also includes multiple light-emitting devices located in the display area, wherein, The light-emitting device is located on the side of the pixel driving circuit away from the substrate and is connected to the pixel driving circuit. The light-emitting device includes a first electrode, a light-emitting functional layer and a second electrode stacked sequentially on the pixel driving circuit.

18. The display panel according to claim 17, characterized in that, It also includes an isolation structure, wherein the isolation structure is located on the side of the pixel driving circuit away from the substrate, and includes a plurality of isolation openings. The isolation opening corresponds to the light-emitting device, the light-emitting functional layer of the light-emitting device and the second electrode are located in the corresponding isolation opening, and the second electrode is connected to the side surface of the isolation opening.

19. The display panel according to claim 18, characterized in that, It also includes a first encapsulation layer, wherein the first encapsulation layer is located on the side of the isolation structure and the light-emitting device away from the substrate, and includes a plurality of encapsulation units, each of which corresponds to the isolation opening to encapsulate the light-emitting device. The packaging units corresponding to the adjacent light-emitting devices that emit different colors of light are spaced apart from each other.

20. A display device, characterized in that, The display panel includes any one of claims 1 to 19.

Images