A display panel and a display device

Abstract

Embodiments of the present invention disclose a display panel and a display device. The display panel includes a flat region and a curved region. The display panel further includes: a substrate; a plurality of signal transmission lines and a plurality of pixel circuits formed on one side of the substrate. The plurality of signal transmission lines include a plurality of first signal transmission lines formed in the flat region and a plurality of second signal transmission lines formed in the curved region. The extending directions of the first signal transmission lines and the second signal transmission lines are the same. The plurality of pixel circuits include a plurality of first pixel circuits formed in the flat region and a plurality of second pixel circuits formed in the curved region. The line width of the second signal transmission lines is greater than the line width of the first signal transmission lines. The area of the second pixel circuits is equal to the area of the first pixel circuits. The line width of the second signal transmission lines in the curved region is greater than the line width of the first signal transmission lines in the flat region, ensuring that the second signal transmission lines have good bending resistance and improving the bending resistance performance of the display panel.

Description

[0001] This application is a divisional application of the application with the application date of July 24, 2018, application number 201810817830.1, and invention creation name "A display panel and a display device". Technical Field

[0002] Embodiments of the present invention relate to the field of display technologies, and in particular, to a display panel and a display device. Background Art

[0003] As a new generation of display devices, flexible displays have very broad application prospects in mobile phones, personal digital assistants (PDAs), digital cameras, in-vehicle displays, laptop computers, wall-mounted TVs, and the military field, etc., because they have the advantages of being thin and light, high contrast, fast response, wide viewing angle, high brightness, full color, etc.

[0004] In existing flexible displays, in order to highlight the flexible characteristics, the display screen can be bent. However, during the bending process, the metal traces in the display will also be bent and stretched, and the metal traces are prone to breakage in the bending area, affecting the normal display of the flexible display. Summary of the Invention

[0005] In view of this, embodiments of the present invention provide a display panel and a display device to solve the technical problem in the prior art that metal traces are prone to breakage in the bending area, affecting the normal display of the display.

[0006] In a first aspect, an embodiment of the present invention provides a display panel, including a flat area and a curved area that is curved relative to the flat area;

[0007] The display panel further includes:

[0008] A substrate;

[0009] A plurality of signal transmission lines and a plurality of pixel circuits formed on one side of the substrate. The plurality of signal transmission lines include a plurality of first signal transmission lines formed in the flat area and a plurality of second signal transmission lines formed in the curved area. The extending directions of the first signal transmission lines and the second signal transmission lines are the same; the plurality of pixel circuits include a plurality of first pixel circuits formed in the flat area and a plurality of second pixel circuits formed in the curved area;

[0010] Wherein, the line width of the second signal transmission line is greater than the line width of the first signal transmission line; the area of the second pixel circuit is equal to the area of the first pixel circuit.

[0011] In a second aspect, an embodiment of the present invention further provides a display device, including the display panel provided in the first aspect.

[0012] The display panel and the display device provided by the embodiments of the present invention, the display panel includes a flat area and a curved area, and further includes a plurality of first signal transmission lines and a plurality of first pixel circuits formed in the flat area, and a plurality of second signal transmission lines and a plurality of second pixel circuits formed in the curved area. Wherein, the line width of the second signal transmission line is greater than the line width of the first signal transmission line, and the area of the first pixel circuit is greater than the area of the first pixel circuit. By setting the line width of the second signal transmission line to be greater than the line width of the first signal transmission line, it is ensured that the second signal transmission line has good bend resistance and is not easily broken during bending, ensuring normal display of the display panel; at the same time, the area of the second pixel circuit is greater than the area of the first pixel circuit, ensuring that the manufacturing process of the display panel is simple. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the introduced drawings are only the drawings of a part of the embodiments to be described by the present invention, rather than all the drawings. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 is a schematic structural diagram of a display panel;

[0015] Figure 2 is a schematic structural diagram of a display panel provided by an embodiment of the present invention;

[0016] Figure 3 is a schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0017] Figure 4 is a schematic structural diagram of yet another display panel provided by an embodiment of the present invention;

[0018] Figure 5 is Figure 4 a schematic cross-sectional structure diagram of the provided display panel along the section line A-A';

[0019] Figure 6 is a schematic structural diagram of yet another display panel provided by an embodiment of the present invention;

[0020] Figure 7 is Figure 6 a schematic cross-sectional structure diagram of the provided display panel along the section line B-B';

[0021] Figure 8 is a schematic structural diagram of yet another display panel provided by an embodiment of the present invention;

[0022] Figure 9It is a schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0023] Figure 10 It is a schematic structural diagram of a display device provided by an embodiment of the present invention. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the present invention clearer, the following will, in conjunction with the accompanying drawings in the embodiments of the present invention, completely describe the technical solutions of the present invention through specific implementation manners. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0025] Figure 1 It is a schematic structural diagram of a display panel. As Figure 1 shown, the display panel may include a flat area 10 and a curved area 11 that is curved with respect to the flat area 10;

[0026] The display panel may further include:

[0027] A substrate 12;

[0028] A plurality of signal transmission lines 13 formed on one side of the substrate 12. The plurality of signal transmission lines 13 include a plurality of first signal transmission lines 131 formed in the flat area 10 and a plurality of second signal transmission lines 132 formed in the curved area 11;

[0029] Among them, the line widths of the first signal transmission lines 131 and the second signal transmission lines 132 are the same.

[0030] Since the second signal transmission lines 132 are formed in the curved area 11 and the line widths of the second signal transmission lines 132 are the same as those of the first signal transmission lines 131, when the curved area is bent, the second signal transmission lines 132 are likely to be broken, resulting in unstable display of the entire display panel and poor folding resistance of the entire display panel.

[0031] Based on the above technical problems, an embodiment of the present invention provides a display panel, including a flat area and a curved area that is curved with respect to the flat area; the display panel further includes: a substrate; a plurality of signal transmission lines and a plurality of pixel circuits formed on one side of the substrate, the plurality of signal transmission lines including a plurality of first signal transmission lines formed in the flat area and a plurality of second signal transmission lines formed in the curved area, the first signal transmission lines and the second signal transmission lines having the same extending direction; the plurality of pixel circuits including a plurality of first pixel circuits formed in the flat area and a plurality of second pixel circuits formed in the curved area; wherein, the line width of the second signal transmission lines is greater than the line width of the first signal transmission lines; the area of the second pixel circuits is equal to the area of the first pixel circuits. The technical solution of the embodiment of the present invention ensures that the second signal transmission lines are not easily broken when bent by setting the line width of the second signal transmission lines formed in the curved area to be greater than the line width of the first signal transmission lines formed in the flat area, so that the second signal transmission lines have good bending resistance, ensuring normal display of the display panel and good bending resistance of the entire display panel.

[0032] The above is the core idea of the present invention. Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] Figure 2 is a schematic structural diagram of a display panel provided by an embodiment of the present invention. As Figure 2 shown, the display panel provided by the embodiment of the present invention may include a flat area 20 and a curved area 21 that is curved with respect to the flat area 20;

[0034] The display panel further includes:

[0035] a substrate 22;

[0036] a plurality of signal transmission lines 23 and a plurality of pixel circuits 24 formed on one side of the substrate 22, the plurality of signal transmission lines including first signal transmission lines 231 formed in the flat area 20 and second signal transmission lines 232 formed in the curved area, the first signal transmission lines 231 and the second signal transmission lines 232 having the same extending direction; the plurality of pixel circuits 24 including a plurality of first pixel circuits 241 formed in the flat area 20 and a plurality of second pixel circuits 242 formed in the curved area 21;

[0037] wherein, the line width of the second signal transmission lines 232 is greater than the line width of the first signal transmission lines 231; the area of the second pixel circuits 242 is equal to the area of the first pixel circuits 241.

[0038] As Figure 2As shown, the line width of the second signal transmission line 232 formed in the bending region 21 is greater than that of the first signal transmission line 231 formed in the flat region 20, so as to ensure that when bending occurs in the bending region 21, the second signal transmission line 232 formed in the bending region 21 has good bending resistance, the second signal transmission line 232 is not easily broken, ensuring that the display panel can be normally displayed, and improving the bending resistance and reliability of the display panel.

[0039] Optionally, continuing to refer to Figure 2 , the display panel provided by the embodiment of the present invention may further include a plurality of pixel circuits 24, specifically including a first pixel circuit 241 formed in the flat region 20 and a second pixel circuit 242 formed in the bending region 21. Among them, the area of the second pixel circuit 242 is equal to the area of the first pixel circuit 241. The area of the second pixel circuit 242 does not increase with the widening of the second signal transmission line 232, ensuring that the design specifications of the pixel circuits 24 of the entire display panel are consistent, and the design of the pixel circuits 24 in the display panel is simple. It should be noted that the pixel circuit 24 may include a plurality of thin film transistors and a plurality of capacitor structures. For example, the pixel circuit 24 may include 7 thin film transistors and 1 capacitor structure. Attached Figure 2 Only an example in which the pixel circuit 24 includes one thin film transistor is described herein.

[0040] Optionally, the substrate 22 may include various suitable materials having flexible or bendable characteristics. For example, the substrate 22 may include polymer resins such as polyether sulfone (PES), polypropylene resin (PAR), polyetherimide (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyallylate, polyimide (PI), polycarbonate (PC), and / or cellulose acetate propionate (CAP).

[0041] Figure 3 is a schematic structural diagram of another display panel provided by the embodiment of the present invention. As Figure 3 shown, along the extension direction of the signal transmission line 23, the flat region 20 may include a first flat region 201 and a second flat region 202, and the bending region 21 may at least include a first bending region 211, a second bending region 212, and a third bending region 213; among them, along the extension direction of the signal transmission line 23, the second bending region 212 is located at the middle position of the bending region 21; the first flat region 201 and the second flat region 202 are symmetric about the second bending region 212; the first bending region 211 and the third bending region 213 are symmetric about the second bending region 212.

[0042] Along the extension direction of the intersection line between the curved region 21 and the flat region 20, the line width of the first signal transmission line 231 in the first flat region 201 is d1, the line width of the first signal transmission line 231 in the second flat region 202 is d2, the line width of the second signal transmission line 232 in the first curved region 211 is d3, the line width of the second signal transmission line 232 in the second curved region 212 is d4, and the line width of the second signal transmission line 232 in the third curved region 213 is d5; among them, d1 = d2 < d3; d3 = d5 < d4.

[0043] As Figure 3As shown in the figure, along the extension direction of the signal transmission line 23, the display screen is schematically divided into a first flat area 201, a first curved area 211, a second curved area 212, a third curved area 213, and a second flat area 202 in sequence; among them, the second curved area 212 is located in the middle position of the entire display screen, the first flat area 201 and the second flat area 202 are symmetric about the second curved area 212, and the first curved area 211 and the third curved area are symmetric about the second curved area 212. At the same time, along the extension direction of the intersection line (not shown in the figure) between the curved area 21 and the flat area 20, the line width of the signal transmission line 23 gradually becomes wider and then gradually becomes narrower. The line width of the first signal transmission line 231 in the first flat area 210 and the second flat area 202 is the smallest, the line width of the second signal transmission line 232 in the first curved area 211 and the third curved area 213 is larger, and the line width of the second signal transmission line 232 in the second curved area 212 is the largest. Specifically, the line width d1 of the first signal transmission line 231 in the first flat area 201 is equal to the line width d2 of the first signal transmission line 231 in the second flat area 202. The line width d3 of the second signal transmission line 232 in the first curved area 211 is equal to the line width d5 of the second signal transmission line 232 in the third curved area 213 and is greater than the line width d1 of the first signal transmission line 231 in the first flat area 201 and the line width d2 of the first signal transmission line 231 in the second flat area 202; the line width d4 of the second signal transmission line 232 in the second curved area is the largest, that is, d1 = d2 < d3; d3 = d5 < d4. Setting the line width of the signal transmission line 23 to gradually become wider and then gradually become narrower not only ensures that the line width of the second signal transmission line 232 in the curved area 21 is larger, ensures that the second signal transmission line 232 has good bending resistance, is not prone to breakage, and improves the bending resistance and reliability of the display panel; at the same time, along the extension direction of the signal transmission line 23, the line width of the signal transmission line 23 gradually changes, and the resistance on the signal transmission line 23 also gradually changes. The power supply voltage drop (IR Drop) of the display signal on the signal transmission line 23 also gradually changes. Since the IR Drop will cause current differences in different regions, setting the line width of the signal transmission line 23 to gradually change ensures that the current differences gradually change, and will not affect the display effect of the display panel due to sudden changes in current differences, ensuring good display uniformity.

[0044] Optionally, 1.5d1 ≤ d3 ≤ 2.5d1; 1.2d3 ≤ d5 ≤ 2d3. Reasonably setting the line widths of the signal transmission lines 23 in different regions can ensure good bending resistance of the display panel; at the same time, the line widths of the signal transmission lines 23 in different regions match the existing film layer preparation process, ensuring simple preparation process of the display panel.

[0045] It should be noted that Figure 3Only taking the example that the bending region 21 only includes the first bending region 211, the second bending region 212 and the third bending region 213, it can be understood that the bending region 21 may include multiple regions. For example, the bending region 21 may include the first bending region, the second bending region, the third bending region, the fourth bending region and the fifth bending region. Among them, along the extending direction of the signal transmission line 23, the third bending region is located at the middle position of the bending region 21, the first bending region and the fifth bending region are symmetric about the third bending region, and the second bending region and the fourth bending region are symmetric about the third bending region; or the bending region 21 may further include 7 regions or 9 regions or more regions, and the embodiments of the present invention do not limit this.

[0046] Optionally, the included angle between the extending directions of the first signal transmission line 231 and the second signal transmission line 232 and the extending direction of the intersection line between the bending region 21 and the flat region 20 may be θ, where 45° ≤ θ ≤ 90°. Figure 2 and Figure 3 Only taking the included angle between the extending directions of the first signal transmission line 231 and the second signal transmission line 232 and the extending direction of the intersection line between the bending region 21 and the flat region 20 being 90° as an example for illustration, it can be understood that when the included angle between the extending directions of the first signal transmission line 231 and the second signal transmission line 232 and the extending direction of the intersection line between the bending region 21 and the flat region 20 is within the range of 45° - 90°, by setting the line width of the second signal transmission line 232 to be greater than the line width of the first signal transmission line 231, the good bend resistance of the second signal transmission line 232 can be ensured, and when the bending region 21 is bent, the second signal transmission line 232 is not easily bent.

[0047] Figure 4 is a schematic structural diagram of another display panel provided by an embodiment of the present invention. As Figure 4 shown, the display panel provided by the embodiment of the present invention may further include a plurality of organic light-emitting units 25 located on the side of the pixel circuit 24 away from the substrate 22. In the extending direction of the signal transmission line 23 and the direction perpendicular to the extending direction of the signal transmission line 23, the plurality of organic light-emitting units 25 are arranged in a matrix; the plurality of organic light-emitting units 25 include a first organic light-emitting unit 251 formed in the flat region 20 and a second organic light-emitting unit 252 formed in the bending region 21; among them, the first organic light-emitting unit 251 includes a first anode electrode 2511, the second organic light-emitting unit 252 includes a second anode electrode 2521, and along the direction perpendicular to the extending direction of the signal transmission line 23, the number of the first anode electrodes 2511 is the same as the number of the second anode electrodes 2521.

[0048] As Figure 4As shown, along the vertical direction of the extension direction of the signal transmission line 23, the number of the first anode electrodes 2511 is the same as the number of the second anode electrodes 2521, which means that the number of the first organic light-emitting units 251 included in each row of pixels in the flat area 20 is the same as the number of the second organic light-emitting units 252 included in each row of pixels in the curved area 21. In the curved area 21, the number of organic light-emitting units 25 is not reduced due to the larger line width of the second signal transmission line 232, which ensures that the pixel resolution in the curved area 21 is the same as the pixel resolution in the flat area 20, ensures that different areas in the entire display panel have the same pixel resolution, and ensures that the display panel has good display uniformity. It should be noted that the organic light-emitting unit 25 may include an anode electrode, an organic light-emitting layer and a cathode electrode. Figure 4 The anode electrode is only shown schematically.

[0049] Exemplarily, since the line width of the second signal transmission line 232 formed in the curved area 21 is greater than the line width of the first signal transmission line 231 formed in the flat area 20, and the area of ​​the second pixel circuit 242 formed in the curved area 21 is equal to the area of ​​the first pixel circuit 241 formed in the flat area 20, the number of second pixel circuits 242 formed in the curved area 21 is less than the number of first pixel circuits 241 formed in the flat area 20. In order to ensure that the second organic light-emitting units 252 formed in the curved area 21 can emit light and display normally, each second pixel circuit 242 needs to drive at least two second organic light-emitting units 252 to ensure that each second organic light-emitting unit 252 in the curved area 21 can emit light and display normally, thereby ensuring the normal operation of the display panel. Figure 5 yes Figure 4 A schematic diagram of a cross-sectional structure of a display panel along a cross-sectional line AA' is provided, Figure 5 Take each second pixel circuit 242 driving two second organic light emitting units 252 as an example for description. Figure 5 As shown, the drain of each second pixel circuit 242 is electrically connected to the second anode electrodes 2521 of the two second organic light-emitting units 252, respectively, and the two second organic light-emitting units 252 are driven to emit light at the same time, ensuring that a driving current is input to each second anode electrode 2521, and normal display can be achieved. It can be understood that the second pixel circuit 242 provided in the embodiment of the present invention can also drive multiple second organic light-emitting units 252 at the same time, such as three, four or more, which will not be repeated here.

[0050] Optionally, the second organic light emitting unit 252 may include a red organic light emitting unit, a green organic light emitting unit and a blue organic light emitting unit, wherein each second pixel circuit 242 drives at least two green organic light emitting units.

[0051] Exemplarily, when each pixel circuit 24 drives at least two organic light-emitting units 25, the driving current i1 received by each organic light-emitting unit 25 is less than the driving current i2 received by the organic light-emitting unit 25 when each pixel circuit 24 drives only one organic light-emitting unit 25. At the same time, the emission brightness of each organic light-emitting unit 25 is related to the driving current it receives. Moreover, among the red organic light-emitting unit, the green organic light-emitting unit, and the blue organic light-emitting unit, the human eye is most sensitive to the green light emitted by the green organic light-emitting unit. Therefore, each second pixel circuit 252 is set to drive at least two green organic light-emitting units simultaneously, ensuring that when the received driving current of the green organic light-emitting unit is small, its emission brightness still appears to be large to the human eye, ensuring that the display effect of the display panel will not be affected thereby and ensuring good display effect of the display panel.

[0052] Figure 6 is a schematic structural diagram of another display panel provided by an embodiment of the present invention. As Figure 6 shown, the display panel provided by the embodiment of the present invention may further include a plurality of organic light-emitting units 25 located on the side of the pixel circuit 24 away from the substrate 22. In the extending direction of the signal transmission line 23 and the direction perpendicular to the extending direction of the signal transmission line 23, the plurality of organic light-emitting units 25 are arranged in a matrix; the plurality of organic light-emitting units 25 include a third organic light-emitting unit 253 formed in the flat area 20 and a fourth organic light-emitting unit 254 formed in the curved area 21; wherein, the third organic light-emitting unit 253 includes a third anode electrode 2531, and the fourth organic light-emitting unit 254 includes a fourth anode 2541. Along the direction perpendicular to the extending direction of the signal transmission line 23, the number of the third anode electrodes 2531 is greater than the number of the fourth anode electrodes 2541.

[0053] As Figure 6As shown, along the vertical direction of the extension direction of the signal transmission line 23, the number of the third anode electrodes 2531 is greater than the number of the fourth anode electrodes 2541, which means that the number of the third organic light-emitting units 253 included in each row in the flat area 20 is greater than the number of the fourth organic light-emitting units 254 included in each row in the curved area 21. The reason is that the line width of the second signal transmission line 232 in the curved area 21 is larger, the second signal transmission line 232 occupies more positions, the number of second pixel circuits 242 is reduced, and the fourth organic light-emitting unit 254 corresponds to the second pixel circuit 242 one by one. One second pixel circuit 242 is used to drive one fourth organic light-emitting unit 254, so the number of fourth organic light-emitting units 254 is also reduced. In the vertical direction along the extension direction of the signal transmission line 23, the number of the third anode electrodes 2531 is greater than the number of the fourth anode electrodes 2541, the number of the third organic light-emitting units 253 corresponds to the number of the first pixel circuits 241, and the number of the fourth organic light-emitting units 254 corresponds to the number of the second pixel circuits 242. One first pixel circuit 241 is used to drive one third organic light-emitting unit 253, and one second pixel circuit 242 is used to drive one fourth organic light-emitting unit 254, so as to ensure that the third organic light-emitting unit 253 and the fourth organic light-emitting unit 254 have the same light-emitting brightness, thereby ensuring the display effect of the display panel. It should be noted that the organic light-emitting unit 25 may include an anode electrode, an organic light-emitting layer, and a cathode electrode. Figure 6 The anode electrode is only shown schematically.

[0054] Figure 7 yes Figure 6 A schematic diagram of a cross-sectional structure of a display panel along a cross-sectional line BB' is provided, as shown in FIG. Figure 7 As shown, since the number of the third anode electrodes 2531 is greater than the number of the four anode electrodes 2541 along the vertical direction of the extension direction of the signal transmission line 23, the coverage area of ​​the fourth anode electrode 2541 is greater than the coverage area of ​​the third anode electrode 2531, that is, the vertical projection of the third anode electrode 2531 on the base substrate 22 is smaller than the vertical projection of the fourth anode electrode 2541 on the base substrate 22.

[0055] Figure 8 is a schematic diagram of the structure of another display panel provided by an embodiment of the present invention, such as Figure 8As shown, the display panel provided by an embodiment of the present invention may further include a plurality of organic light-emitting units 25 located on a side of the pixel circuit 24 away from the substrate 22. In a direction extending along the signal transmission line 23 and a direction perpendicular to the extending direction of the signal transmission line 23, the plurality of organic light-emitting units 25 are arranged in a matrix; the plurality of organic light-emitting units 25 include a fifth organic light-emitting unit 255 formed in the first flat area 201, a sixth organic light-emitting unit 256 formed in the second flat area 202, a seventh organic light-emitting unit 257 formed in the first curved area 211, an eighth organic light-emitting unit 258 formed in the second curved area 212, and a ninth organic light-emitting unit 259 formed in the third curved area 213; wherein, the fifth organic light-emitting unit 255 includes a fifth anode electrode 2551, the sixth organic light-emitting unit 256 includes a sixth anode electrode 2561, the seventh organic light-emitting unit 257 includes a seventh anode electrode 2571, the eighth organic light-emitting unit 258 includes an eighth anode electrode 2581, and the ninth organic light-emitting unit 259 includes a ninth anode electrode 2591; along a direction perpendicular to the extending direction of the signal transmission line 23, the number of the fifth anode electrodes 2551 is the same as the number of the sixth anode electrodes 2561 and is greater than the number of the seventh anode electrodes 2571; the number of the seventh anode electrodes 2571 is the same as the number of the ninth anode electrodes 2591 and is greater than the number of the eighth anode electrodes 2581.

[0056] As Figure 8As shown, in the vertical direction along the extending direction of the signal transmission line 23, the number of the fifth anode electrodes 2551 is the same as that of the sixth anode electrodes 2561 and greater than the number of the seventh anode electrodes 2571; the number of the seventh anode electrodes 2571 is the same as that of the ninth anode electrodes 2591 and greater than the number of the eighth anode electrodes 2581. The reason is that along the extending direction of the intersection line between the curved region 21 and the flat region 20, the line width of the signal transmission line 23 gradually becomes wider and then gradually becomes narrower. The line width of the first signal transmission line 231 in the first flat region 210 and the second flat region 202 is the smallest, the line width of the second signal transmission line 232 in the first curved region 211 and the third curved region 213 is larger, and the line width of the second signal transmission line 232 in the second curved region 212 is the largest. The second signal transmission line 232 in the first curved region 211 occupies more positions compared with the first signal transmission line 231 in the first flat region 201, and the second signal transmission line 232 in the second curved region 212 occupies more positions compared with the second signal transmission line 232 in the first curved region 211. Therefore, the number of the first pixel circuits 241 in the first flat region 201 and the second flat region 202 is the same and greater than the number of the second pixel circuits 242 in the first curved region 211. The number of the second pixel circuits 242 in the first curved region 211 and the third curved region 213 is the same and greater than the number of the second pixel circuits 242 in the second curved region 212. One pixel circuit 24 is used to drive one organic light-emitting unit 25. Therefore, in the vertical direction along the extending direction of the signal transmission line 23, the number of the fifth anode electrodes 2551 is the same as that of the sixth anode electrodes 2561 and greater than the number of the seventh anode electrodes 2571; the number of the seventh anode electrodes 2571 is the same as that of the ninth anode electrodes 2591 and greater than the number of the eighth anode electrodes 2581. One pixel circuit 24 is used to drive one organic light-emitting unit 25 to ensure that the fifth organic light-emitting unit 255, the sixth organic light-emitting unit 256, the seventh organic light-emitting unit 257, the eighth organic light-emitting unit 258, and the ninth organic light-emitting unit 259 have the same emission brightness, thus ensuring the display effect of the display panel. It should be noted that the organic light-emitting unit 25 may include an anode electrode, an organic light-emitting layer, and a cathode electrode. Figure 8 Only the anode electrode is exemplarily drawn.

[0057] Continue to refer to Figure 8, the vertical projections of the fifth anode electrode 2551 and the sixth anode electrode 2561 on the substrate 22 are the same and smaller than the vertical projection of the seventh anode electrode 2571 on the substrate 22; the vertical projections of the seventh anode electrode 2571 and the ninth anode electrode 2591 on the substrate 22 are the same and smaller than the vertical projection of the eighth anode electrode 2581 on the substrate 22. Along the extension direction of the signal transmission line 23, the number of the organic light-emitting units 25 gradually decreases first and then gradually increases, and the light-emitting area of the organic light-emitting units 25 gradually increases first and then gradually decreases, ensuring that the light-emitting area in the display panel gradually changes, and the human eye cannot perceive the change in the light-emitting area, ensuring good display uniformity and good display effect of the entire display panel.

[0058] Continue to refer to Figure 5 and Figure 7 As shown, the display panel provided by the embodiment of the present invention may further include a shielding electrode layer 26; the shielding electrode layer 26 is located between the signal transmission line 23 and the organic light-emitting unit 25, and the vertical projection of the shielding electrode layer 26 on the substrate 22 covers the vertical projection of the second signal transmission line 232 on the substrate 22.

[0059] Exemplarily, as Figure 5 and Figure 7 shown, the shielding electrode layer 26 is located between the film layer where the signal transmission line 23 is located and the film layer where the anode electrode of the organic light-emitting unit 25 is located, and the shielding electrode layer 26 is used to shield the coupling capacitance between the second signal transmission line 232 and the anode electrode. Specifically, since the line width of the second signal transmission line 232 located in the bending region 21 is relatively large, it may cause a large coupling capacitance between the second signal transmission line 232 and the anode electrode located thereon. By providing the shielding electrode layer 26 between the film layer where the signal transmission line 23 is located and the film layer where the anode electrode of the organic light-emitting unit 25 is located, and the vertical projection of the shielding electrode layer 26 on the substrate 22 covers the vertical projection of the second signal transmission line 232 on the substrate 22, it is ensured that the shielding electrode layer 26 can completely shield the coupling capacitance between the second signal transmission line 232 and the anode electrode located thereon, without affecting the normal display of the display panel.

[0060] Figure 9 is a schematic structural diagram of another display panel provided by the embodiment of the present invention. As Figure 9 shown, in the display panel provided by the embodiment of the present invention, a via structure 27 is formed on the second signal transmission line 232, and the aperture of the via structure 27 is smaller than the line width of the second signal transmission line 232. As Figure 9As shown, a plurality of via structures 27 are formed on the second signal transmission line 232, so that the facing area between the second signal transmission line 232 and the anode electrode located thereon can be reduced, the coupling capacitance between the second signal transmission line 232 and the anode electrode thereon can be decreased, the interference to the normal display of the display panel caused by the existence of the coupling capacitance can be reduced, ensuring that the display panel can be normally displayed without the technical problem of poor display caused by the relatively large line width of the second signal transmission line 232. Moreover, the plurality of via structures 27 formed on the second signal transmission line 232 can also release the stress generated during the bending process of the second signal transmission line 232, greatly reducing the risk of the second signal transmission line 232 breaking during the bending process, improving the bending resistance characteristics of the display panel, and ensuring that the display panel can be normally displayed when bent. It should be noted that Figure 9 Only taking the via structure 27 as an ellipse as an example for illustration, it can be understood that the shape of the via structure 27 can also include a circle, a rectangle, a triangle, or other irregular shapes, and the embodiments of the present invention do not limit this.

[0061] Optionally, the display panel provided by the embodiments of the present invention can be a top-emitting display panel. In this way, the light-emitting direction of the display panel is away from the signal transmission line 23, ensuring that even if the line width of the second signal transmission line 232 is relatively large in the bending region 21, the second signal transmission line 23 will not block the light emitted by the display panel and will not affect the normal display of the display panel.

[0062] Optionally, the signal transmission line 23 provided by the embodiments of the present invention can include at least one of a data signal transmission line, a scan signal transmission line, a voltage signal transmission line, and a touch control signal transmission line, and the embodiments of the present invention do not limit this.

[0063] Figure 10 is a schematic structural diagram of a display device provided by the embodiments of the present invention. Referring to Figure 10 , the display device 100 can include the display panel 101 described in any embodiment of the present invention. The display device 100 can be Figure 10 the mobile phone shown, or a computer, a television, a smart wearable display device, etc. The embodiments of the present invention do not make special limitations on this.

[0064] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here. Various obvious changes, re-adjustments, combinations with each other, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, it can also include more other equivalent embodiments, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that, including a flat area and a curved area that is curved with respect to the flat area; The display panel further includes: a substrate; a plurality of signal transmission lines and a plurality of pixel circuits formed on one side of the substrate. The plurality of signal transmission lines include a plurality of first signal transmission lines formed in the flat area and a plurality of second signal transmission lines formed in the curved area. The first signal transmission lines and the second signal transmission lines have the same extending direction. The plurality of pixel circuits include a plurality of first pixel circuits formed in the flat area and a plurality of second pixel circuits formed in the curved area; a plurality of first signal lines connected to the pixel circuits and formed on one side of the substrate. The extending direction of the first signal lines intersects with the extending direction of the signal transmission lines; The second signal transmission line includes a wide portion and a narrow portion arranged along the extending direction of the signal transmission line. In a direction perpendicular to the plane of the display panel, the first signal line and the narrow portion overlap; The signal transmission line includes a voltage signal transmission line; The line width of the second signal transmission line is greater than the line width of the first signal transmission line, and the area of the second pixel circuit is equal to the area of the first pixel circuit.

2. The display panel according to claim 1, wherein Along the extending direction of the first signal line, except for the first column and the last column, the remaining signal transmission lines include multiple pairs of adjacent signal transmission lines, and the wide portions of the multiple pairs of adjacent signal transmission lines face each other; The wide portions of the two signal transmission lines in the first column and the last column face away from each other.

3. The display panel according to claim 1, wherein, Along the extending direction of the signal transmission line, the flat area includes a first flat area and a second flat area, and the curved area includes at least a first curved area, a second curved area, and a third curved area; wherein, along the extending direction of the signal transmission line, the second curved area is located at the middle position of the curved area; The first flat area and the second flat area are symmetric with respect to the second curved area; The first curved area and the third curved area are symmetric with respect to the second curved area.

4. The display panel according to claim 3, wherein Along the extending direction of the intersection line between the curved area and the flat area, the line width of the first signal transmission line in the first flat area is d1, the line width of the first signal transmission line in the second flat area is d2, the line width of the second signal transmission line in the first curved area is d3, the line width of the second signal transmission line in the second curved area is d4, and the line width of the second signal transmission line in the third curved area is d5; wherein, d1 = d2 < d3; d3 = d5 < d4.

5. The display panel according to claim 4, wherein 1.5d1 ≤ d3 ≤ 2.5d1; 1.2d3 ≤ d5 ≤ 2d3.

6. The display panel according to claim 1, wherein The included angle between the extending direction of the first signal transmission line and the second signal transmission line and the extending direction of the intersection line between the curved area and the flat area is θ, where 45° ≤ θ ≤ 90°.

7. The display panel according to claim 1, characterized in that, It further includes a plurality of organic light-emitting units located on a side of the pixel circuit away from the substrate. In the extending direction of the signal transmission line and the direction perpendicular to the extending direction of the signal transmission line, the plurality of organic light-emitting units are arranged in a matrix; the plurality of organic light-emitting units include a first organic light-emitting unit formed in the flat area and a second organic light-emitting unit formed in the curved area; Wherein, the first organic light-emitting unit includes a first anode electrode, and the second organic light-emitting unit includes a second anode electrode; along the direction perpendicular to the extending direction of the signal transmission line, the number of the first anode electrodes is the same as the number of the second anode electrodes.

8. The display panel according to claim 7, wherein Each of the second pixel circuits drives at least two of the second organic light-emitting units.

9. The display panel according to claim 8, wherein The second organic light-emitting unit includes a red organic light-emitting unit, a green organic light-emitting unit, and a blue organic light-emitting unit; Wherein, each of the second pixel circuits drives at least two of the green organic light-emitting units.

10. The display panel according to claim 1, characterized in that It further includes a plurality of matrix-arranged organic light-emitting units located on a side of the pixel circuit away from the substrate. In the extending direction of the signal transmission line and the direction perpendicular to the extending direction of the signal transmission line, the plurality of organic light-emitting units are arranged in a matrix; the plurality of organic light-emitting units include a third organic light-emitting unit formed in the flat area and a fourth organic light-emitting unit formed in the curved area; Wherein, the third organic light-emitting unit includes a third anode electrode, and the fourth organic light-emitting unit includes a fourth anode electrode; along the direction perpendicular to the extending direction of the signal transmission line, the number of the third anode electrodes is greater than the number of the fourth anode electrodes.

11. The display panel according to claim 10, wherein The vertical projection of the third anode electrode on the substrate is smaller than the vertical projection of the fourth anode electrode on the substrate.

12. The display panel according to claim 3, wherein, It further includes a plurality of matrix-arranged organic light-emitting units located on a side of the pixel circuit away from the substrate. In the extending direction of the signal transmission line and the direction perpendicular to the extending direction of the signal transmission line, the plurality of organic light-emitting units are arranged in a matrix; the plurality of organic light-emitting units include a fifth organic light-emitting unit formed in the first flat area, a sixth organic light-emitting unit formed in the second flat area, a seventh organic light-emitting unit formed in the first curved area, an eighth organic light-emitting unit formed in the second curved area, and a ninth organic light-emitting unit formed in the third curved area; Wherein, the fifth organic light-emitting unit includes a fifth anode electrode, the sixth organic light-emitting unit includes a sixth anode electrode, the seventh organic light-emitting unit includes a seventh anode electrode, the eighth organic light-emitting unit includes an eighth anode electrode, and the ninth organic light-emitting unit includes a ninth anode electrode; Along the direction perpendicular to the extending direction of the signal transmission line, the number of the fifth anode electrodes is the same as the number of the sixth anode electrodes and greater than the number of the seventh anode electrodes; the number of the seventh anode electrodes is the same as the number of the ninth anode electrodes and greater than the number of the eighth anode electrodes.

13. The display panel according to claim 12, wherein The vertical projections of the fifth anode electrode and the sixth anode electrode on the substrate substrate are the same and smaller than the vertical projection of the seventh anode electrode on the substrate substrate; the vertical projections of the seventh anode electrode and the ninth anode electrode on the substrate substrate are the same and smaller than the vertical projection of the eighth anode electrode on the substrate substrate.

14. The display panel according to any one of claims 7, 10, and 12, wherein It further includes a shielding electrode layer; The shielding electrode layer is located between the signal transmission line and the organic light-emitting unit, and the vertical projection of the shielding electrode layer on the substrate substrate covers the vertical projection of the second signal transmission line on the substrate substrate.

15. The display panel according to claim 1, characterized in that, A via structure is formed on the second signal transmission line, and the aperture of the via structure is smaller than the line width of the second signal transmission line.

16. The display panel according to claim 1, wherein, The display panel is a top-emission display panel.

17. A display device, characterized in that, It includes the display panel according to any one of claims 1-16.

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