CN114203764A - Display panel and display device - Google Patents
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- CN114203764A CN114203764A CN202111039779.4A CN202111039779A CN114203764A CN 114203764 A CN114203764 A CN 114203764A CN 202111039779 A CN202111039779 A CN 202111039779A CN 114203764 A CN114203764 A CN 114203764A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/131—Interconnections, e.g. wiring lines or terminals
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- Physics & Mathematics (AREA)
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- Theoretical Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The embodiment of the invention discloses a display panel and a display device, wherein the display panel comprises a flat area and a bent area; the display panel further includes: a substrate base plate; 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 region and a plurality of second signal transmission lines formed in the bent region, the first signal transmission lines and the second signal transmission lines extending in the same direction; the plurality of pixel circuits includes 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 line is greater than that of the first signal transmission line; the area of the second pixel circuit is equal to the area of the first pixel circuit. The line width of the second signal transmission line in the bending area is larger than that of the first signal transmission line in the flat area, so that the second signal transmission line is ensured to have good bending resistance, and the bending resistance of the display panel is improved.
Description
The application is a divisional application with application date of 2018, 7, 24 and application number of 201810817830.1 and entitled "a display panel and a display device".
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display panel and a display device.
Background
As a new generation of display devices, flexible displays have the advantages of thinness, lightness, high contrast, fast response, wide viewing angle, high brightness, full color and the like, and thus have very wide application prospects in the fields of mobile phones, Personal Digital Assistants (PDAs), digital cameras, vehicle-mounted displays, notebook computers, wall-mounted televisions, military and the like.
Can buckle the display screen in order to highlight flexible characteristic among the current flexible display, but also can cause the bending and the tensile of metal wiring in the display at the in-process of buckling, the cracked phenomenon of metal wiring appears easily in the region of buckling, influences the flexible display and normally shows.
Disclosure of Invention
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 a metal trace is easily broken in a bending region to affect normal display of a display.
In a first aspect, an embodiment of the present invention provides a display panel, including a flat region and a curved region that is curved with respect to the flat region;
the display panel further includes:
a substrate base plate;
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 region and a plurality of second signal transmission lines formed in the curved region, the first signal transmission lines and the second signal transmission lines extending in the same direction; the plurality of pixel circuits includes 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 line is greater than that of the first signal transmission line; the area of the second pixel circuit is equal to the area of the first pixel circuit.
In a second aspect, an embodiment of the present invention further provides a display device, including the display panel provided in the first aspect.
The display panel comprises a flat area, a bent area, a plurality of first signal transmission lines and a plurality of first pixel circuits, wherein the first signal transmission lines and the first pixel circuits are formed in the flat area, and a plurality of second signal transmission lines and a plurality of second pixel circuits are formed in the bent area, the line width of the second signal transmission lines is larger than the line width of the first signal transmission lines, and the area of the first pixel circuits is larger than the area of the first pixel circuits. The line width of the second signal transmission line is larger than that of the first signal transmission line, so that the second signal transmission line is good in bending resistance, is not easy to break during bending, and ensures normal display of the display panel; meanwhile, the area of the second pixel circuit is larger than that of the first pixel circuit, so that the preparation process of the display panel is simple.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, a brief description is given below of the drawings used in describing the embodiments. It should be clear that the described figures are only views of some of the embodiments of the invention to be described, not all, and that for a person skilled in the art, other figures can be derived from these figures without inventive effort.
FIG. 1 is a schematic diagram of a display panel;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of the display panel provided in FIG. 4 along the sectional line A-A';
FIG. 6 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 7 is a cross-sectional view of the display panel provided in FIG. 6 along the section line B-B';
FIG. 8 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be fully described by the detailed description with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, not all embodiments, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without inventive efforts fall within the scope of the present invention.
Fig. 1 is a schematic structural diagram of a display panel, and as shown in fig. 1, the display panel may include a flat region 10 and a curved region 11 curved with respect to the flat region 10;
the display panel may further include:
a base substrate 12;
a plurality of signal transmission lines 13 formed on one side of the substrate base plate 12, the plurality of signal transmission lines 13 including a plurality of first signal transmission lines 131 formed in the flat region 10 and a plurality of second signal transmission lines 132 formed in the curved region 11;
the first signal transmission line 131 and the second signal transmission line 132 have the same line width.
Since the second signal transmission line 132 is formed in the bending region 11, and the line width of the second signal transmission line 132 is the same as the line width of the first signal transmission line 131, when the bending region is bent, the second signal transmission line 132 is easily broken, which results in unstable display of the whole display panel and poor bending resistance of the whole display panel.
Based on the technical problem, an embodiment of the present invention provides a display panel, including a flat region and a curved region curved with respect to the flat region; the display panel further includes: a substrate base plate; 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 region and a plurality of second signal transmission lines formed in the bent region, the first signal transmission lines and the second signal transmission lines extending in the same direction; the plurality of pixel circuits includes 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 line is greater than that of the first signal transmission line; the area of the second pixel circuit is equal to the area of the first pixel circuit. According to the technical scheme of the embodiment of the invention, the line width of the second signal transmission line formed in the bending area is larger than the line width of the first signal transmission line formed in the flat area, so that the second signal transmission line is not easy to break when being bent, the bending resistance is good, the normal display of the display panel is ensured, and the bending resistance of the whole display panel is good.
The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
Fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention, and as shown in fig. 2, the display panel according to an embodiment of the present invention may include a flat region 20 and a curved region 21 that is curved with respect to the flat region 20;
the display panel further includes:
a base substrate 22;
a plurality of signal transmission lines 23 and a plurality of pixel circuits 24 formed on one side of the substrate base plate 22, the plurality of signal transmission lines including a first signal transmission line 231 formed in the flat region 20 and a second signal transmission line 232 formed in the bent region, the first signal transmission line 231 extending in the same direction as the second signal transmission line 232; the plurality of pixel circuits 24 include a plurality of first pixel circuits 241 formed in the flat region 20 and a plurality of second pixel circuits 242 formed in the curved region 21;
the line width of the second signal transmission line 232 is greater than the line width of the first signal transmission line 231; the area of the second pixel circuit 242 is equal to the area of the first pixel circuit 241.
As shown in fig. 2, the line width of the second signal transmission line 232 formed in the bending region 21 is greater than the line width of the first signal transmission line 231 formed in the flat region 20, so that when the bending region 21 is bent, the bending resistance of the second signal transmission line 232 formed in the bending region 21 is good, the second signal transmission line 232 is not easily broken, the normal display of the display panel is ensured, and the bending resistance and the reliability of the display panel are improved.
Optionally, with continuing reference to fig. 2, the display panel according to the embodiment of the present invention may further include a plurality of pixel circuits 24, and specifically, the display panel may further include a first pixel circuit 241 formed in the flat region 20 and a second pixel circuit 242 formed in the curved region 21, where an area of the second pixel circuit 242 is equal to an area of the first pixel circuit 241. The area of the second pixel circuit 242 is not increased along with the increase of the second signal transmission line 232, so as to ensure the design specification of the pixel circuit 24 of the whole display panel to be consistent, and the design of the pixel circuit 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, and fig. 2 only illustrates that the pixel circuit 24 includes one thin film transistor.
Alternatively, the substrate 22 may comprise various suitable materials having flexible or bendable characteristics. For example, the base substrate 22 may include a polymer resin such as Polyethersulfone (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).
Fig. 3 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and as shown in fig. 3, along the extending 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 curved region 21 may include at least a first curved region 211, a second curved region 212, and a third curved region 213; wherein, along the extending 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 and second flat regions 201 and 202 are symmetric about the second curved region 212; the first bending region 211 and the third bending region 213 are symmetrical with respect to the second bending region 212.
In the extending direction of the intersection line of 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 d 5; wherein d1 ═ d2< d 3; d3 ═ d5< d 4.
As shown in fig. 3, along the extending direction of the signal transmission line 23, the display screen is schematically and sequentially 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; wherein the second bending region 212 is located at a middle position of the entire display screen, the first and second flat regions 201 and 202 are symmetrical with respect to the second bending region 212, and the first and third bending regions 211 and 212 are symmetrical with respect to the second bending region 212. Meanwhile, along the extending direction of the intersection line (not shown in the figure) of 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 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 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 bending region is the largest, i.e., d1 ═ d2< d 3; d3 ═ d5< d 4. The line width of the signal transmission line 23 is gradually widened and then gradually narrowed, so that the line width of the second signal transmission line 232 in the bending area 21 is ensured to be larger, the bending resistance of the second signal transmission line 232 is ensured to be good, the second signal transmission line is not easy to break, and the bending resistance and the reliability of the display panel are improved; meanwhile, along the extending direction of the signal transmission line 23, the line width of the signal transmission line 23 gradually changes, the resistance on the signal transmission line 23 also gradually changes, and the power supply voltage Drop (IR Drop) of the display signal on the signal transmission line 23 also gradually changes.
Optionally, d3 is more than or equal to 1.5d1 and less than or equal to 2.5d 1; 1.2d3 is not less than d5 is not less than 2d 3. The line widths of the signal transmission lines 23 in different areas are reasonably set, so that the good bending resistance of the display panel can be ensured; meanwhile, the line widths of the signal transmission lines 23 in different areas are matched with the existing film layer preparation process, so that the preparation process of the display panel is simple.
It should be noted that fig. 3 only illustrates that the bending region 21 includes only the first bending region 211, the second bending region 212, and the third bending region 213, and it is understood that the bending region 21 may include a plurality of regions, for example, the bending region 21 may include a first bending region, a second bending region, a third bending region, a fourth bending region, and a fifth bending region, where the third bending region is located at a middle position of the bending region 21 along the extending direction of the signal transmission line 23, 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 area 21 may also include 7 areas or 9 areas or more, which is not limited by the embodiment of the present invention.
Alternatively, the angle between the extending direction of the first and second signal transmission lines 231 and 232 and the extending direction of the intersection line between the curved region 21 and the flat region 20 may be θ, wherein 45 ° ≦ θ ≦ 90 °. Fig. 2 and 3 only illustrate that the angle between the extending direction of the first signal transmission line 231 and the second signal transmission line 232 and the extending direction of the intersection line between the curved region 21 and the flat region 20 is 90 °, it can be understood that when the angle between the extending direction of the first signal transmission line 231 and the second signal transmission line 232 and the extending direction of the intersection line between the curved region 21 and the flat region 20 is in the range of 45 ° to 90 °, the line width of the second signal transmission line 232 is set to be greater than the line width of the first signal transmission line 231, so that the bending resistance of the second signal transmission line 232 can be ensured to be good, and when the curved region 21 is bent, the second signal transmission line 232 is not easily bent.
Fig. 4 is a schematic structural diagram of another display panel provided in an embodiment of the present invention, and as shown in fig. 4, the display panel provided in 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, where the plurality of organic light emitting units 25 are arranged in a matrix in a direction perpendicular to an extending direction of the signal transmission line 23 and an extending direction of the signal transmission line 23; 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 curved region 21; wherein the first organic light emitting unit 251 includes first anode electrodes 2511, and the second organic light emitting unit 252 includes second anode electrodes 2521, the number of the first anode electrodes 2511 is the same as the number of the second anode electrodes 2521 in a direction perpendicular to the extending direction of the signal transmission line 23.
As shown in fig. 4, in 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 that of the second anode electrodes 2521, that is, the number of the first organic light emitting units 251 included in each row of pixels in the flat region 20 is the same as that of the second organic light emitting units 252 included in each row of pixels in the curved region 21, the number of the organic light emitting units 25 is not reduced in the curved region 21 due to the larger line width of the second signal transmission line 232, the pixel resolution in the curved region 21 is ensured to be the same as that in the flat region 20, the same pixel resolution is ensured in different regions in the whole display panel, and the display uniformity of the display panel is ensured to be good. 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, and fig. 4 only exemplarily shows the anode electrode.
Illustratively, since the line width of the second signal transmission line 232 formed in the bending region 21 is greater than the line width of the first signal transmission line 231 formed in the flat region 20, and the area of the second pixel circuit 242 formed in the bending region 21 is equal to the area of the first pixel circuit 241 formed in the flat region 20, the number of the second pixel circuits 242 formed in the bending region 21 is less than the number of the first pixel circuits 241 formed in the flat region 20, and in order to ensure that the second organic light emitting units 252 formed in the bending region 21 can normally emit light for display, each second pixel circuit 242 needs to drive at least two second organic light emitting units 252, each second organic light emitting unit 252 in the bending region 21 can normally emit light for display, and the display panel can normally operate. Fig. 5 is a schematic cross-sectional view of the display panel provided in fig. 4 along a sectional line a-a', and fig. 5 illustrates an example where each second pixel circuit 242 drives two second organic light emitting units 252, and as shown in fig. 5, a 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 drives the two second organic light emitting units 252 to emit light at the same time, so that a driving current is input to each second anode electrode 2521, and normal display can be performed. It is understood that the second pixel circuit 242 provided in the embodiment of the present invention may also drive a plurality of second organic light emitting units 252, for example, three, four, or more, at the same time, which is not described herein again.
Alternatively, 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 of the second pixel circuits 242 drives at least two green organic light emitting units.
Illustratively, the drive current i received at each organic light emitting cell 25 when each pixel circuit 24 drives at least two organic light emitting cells 251Less than the drive current i received by the organic light emitting unit 25 when each pixel circuit 24 drives only one organic light emitting unit 252While the light emission luminance of each organic light emitting cell 25 is related to the driving current it receives; moreover, in the red organic light emitting unit, the green organic light emitting unit, and the blue organic light emitting unit, human eyes are most sensitive to green light emitted by the green organic light emitting unit, and therefore, each second pixel circuit 252 is arranged to simultaneously drive at least two green organic light emitting units, so that the light emitting brightness of the green organic light emitting units is still large when viewed by human eyes under the condition that the received driving current is small, the display effect of the display panel is not affected, and the display effect of the display panel is good.
Fig. 6 is a schematic structural diagram of another display panel provided in an embodiment of the present invention, and as shown in fig. 6, the display panel provided in 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, where the plurality of organic light emitting units 25 are arranged in a matrix in a direction perpendicular to an extending direction of the signal transmission line 23 and an extending direction of the signal transmission line 23; the plurality of organic light emitting units 25 include a third organic light emitting unit 253 formed in the flat region 20 and a fourth organic light emitting unit 254 formed in the curved region 21; wherein the third organic light emitting unit 253 includes third anode electrodes 2531, and the fourth organic light emitting unit 254 includes fourth anode electrodes 2541, the number of the third anode electrodes 2531 is greater than the number of the fourth anode electrodes 2541 in a direction perpendicular to the extending direction of the signal transmission line 23.
As shown in fig. 6, in 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, i.e., it means that the number of the third organic light emitting units 253 included in each row of the flat region 20 is greater than the number of the fourth organic light emitting units 254 included in each row of the curved region 21, because the line width of the second signal transmission line 232 in the curved region 21 is greater, the second signal transmission line 232 occupies more positions, the number of the second pixel circuits 242 is reduced, the fourth organic light emitting units 254 are in one-to-one correspondence with the second pixel circuits 242, one second pixel circuit 242 is used to drive one fourth organic light emitting unit 254, and thus the number of the fourth organic light emitting units 254 is also reduced. Along the vertical direction of 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, the number of the third organic light emitting units 253 corresponds to the number of the first pixel circuits 241, 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 for driving one third organic light emitting unit 253, one second pixel circuit 242 is used for driving one fourth organic light emitting unit 254, the light emitting brightness of the third organic light emitting unit 253 is ensured to be the same as that of the fourth organic light emitting unit 254, and the display effect of the display panel is ensured. 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, and fig. 6 only exemplarily shows the anode electrode.
Fig. 7 is a schematic cross-sectional view of the display panel provided in fig. 6 along a sectional line B-B', and as shown in fig. 7, since the number of the third anode electrodes 2531 is greater than the number of the fourth anode electrodes 2541 along the vertical direction of the extending direction of the signal transmission line 23, the coverage area of the fourth anode electrodes 2541 is greater than the coverage area of the third anode electrodes 2531, that is, the vertical projection of the third anode electrodes 2531 on the substrate base 22 is smaller than the vertical projection of the fourth anode electrodes 2541 on the substrate base 22.
Fig. 8 is a schematic structural diagram of another display panel provided in an embodiment of the present invention, and as shown in fig. 8, the display panel provided in 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, and the plurality of organic light emitting units 25 are arranged in a matrix in a direction perpendicular to an extending direction of the signal transmission line 23 and an extending direction of the signal transmission line 23; the plurality of organic light emitting units 25 include a fifth organic light emitting unit 255 formed in the first flat region 201, a sixth organic light emitting unit 256 formed in the second flat region 202, a seventh organic light emitting unit 257 formed in the first bending region 211, an eighth organic light emitting unit 258 formed in the second bending region 212, and a ninth organic light emitting unit 259 formed in the third bending region 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; in 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 seventh anode electrodes 2571 is the same as the number of ninth anode electrodes 2591 and is greater than the number of eighth anode electrodes 2581.
As shown in fig. 8, 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 in a direction perpendicular to the extending direction of the signal transmission line 23; the number of the seventh anode electrodes 2571 is the same as that of the ninth anode electrodes 2591 and is greater than that of the eighth anode electrodes 2581 because the line width of the signal transmission line 23 is gradually widened and then gradually narrowed along the extension direction of the intersection line of the curved region 21 and the flat region 20, the line width of the first signal transmission line 231 in the first flat region 210 and the second flat region 202 is minimized, the line width of the second signal transmission line 232 in the first curved region 211 and the third curved region 213 is greater, the line width of the second signal transmission line 232 in the second curved region 212 is maximized, the second signal transmission line 232 in the first curved region 211 occupies more positions than 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 than the second signal transmission line 232 in the first curved region 211, therefore, the number of the first pixel circuits 241 in the first and second flat regions 201 and 202 is the same as and greater than the number of the second pixel circuits 242 in the first bending region 211, the number of the second pixel circuits 242 in the first and third bending regions 211 and 213 is the same as and greater than the number of the second pixel circuits 242 in the second bending region 212, one pixel circuit 24 is used to drive one organic light emitting unit 25, and thus, the number of the fifth anode electrodes 2551 is the same as and greater than the number of the sixth anode electrodes 2561 in the direction perpendicular to the extending direction of the signal transmission line 23; the number of seventh anode electrodes 2571 is the same as the number of ninth anode electrodes 2591 and is greater than the number of eighth anode electrodes 2581. One pixel circuit 24 is used for driving one organic light emitting unit 25, and ensures that the light emitting brightness of 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 is the same, 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, and fig. 8 only exemplarily shows the anode electrode.
With continued reference to fig. 8, the vertical projections of the fifth and sixth anode electrodes 2551 and 2561 on the substrate base plate 22 are the same and smaller than the vertical projection of the seventh anode electrode 2571 on the substrate base plate 22; the vertical projection of seventh anode electrode 2571 and ninth anode electrode 2591 on base substrate 22 is the same and smaller than the vertical projection of eighth anode electrode 2581 on base substrate 22. The extension direction of signal transmission line 23 is followed in the assurance, and organic light emitting unit 25's quantity is earlier gradually becoming less and then gradually becomes many, and organic light emitting unit 25's luminous area is earlier gradually grow and then gradually diminishes, guarantees the luminous area gradual change in the display panel, and human eyes can't perceive luminous area's change, and the homogeneity of guaranteeing to show is good, and whole display panel's display effect is good.
As shown in fig. 5 and fig. 7, the display panel provided by the embodiment of the 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 a vertical projection of the shielding electrode layer 26 on the substrate base 22 covers a vertical projection of the second signal transmission line 232 on the substrate base 22.
Illustratively, as shown in fig. 5 and 7, the shielding electrode layer 26 is located between the film layer of the signal transmission line 23 and the film layer of the anode electrode of the organic light emitting unit 25, and the shielding electrode layer 26 is used for shielding 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 large, a large coupling capacitance may be generated between the second signal transmission line 232 and the anode electrode located thereon, by disposing 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, and normal display of the display panel is not affected.
Fig. 9 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and as shown in fig. 9, a via structure 27 is formed on the second signal transmission line 232 in the display panel according to the embodiment of the present invention, and an aperture of the via structure 27 is smaller than a line width of the second signal transmission line 232. As shown in fig. 9, a plurality of via structures 27 are formed on the second signal transmission line 232, so that the area of the second signal transmission line 232 directly facing the anode electrode thereon can be reduced, the coupling capacitance between the second signal transmission line 232 and the anode electrode thereon can be reduced, the interference caused by the coupling capacitance to the normal display of the display panel can be reduced, the display panel can display normally, and the technical problem of poor display due to the large line width of the second signal transmission line 232 can be solved. Moreover, the plurality of via hole structures 27 formed on the second signal transmission line 232 can also release the stress generated by bending in the bending process of the second signal transmission line 232, so that the risk of breakage of the second signal transmission line 232 in the bending process is greatly reduced, the bending resistance of the display panel is improved, and the display panel can normally display when being bent. It should be noted that fig. 9 only illustrates that the via structure 27 is an oval shape, and it should be understood that the shape of the via structure 27 may also include a circle, a rectangle, a triangle, or other irregular figures, which is not limited in this embodiment of the present invention.
Optionally, the display panel provided in the embodiment of the present invention may be a top emission display panel, and thus the light emitting direction of the display panel is a direction away from the signal transmission line 23, so as to ensure that even if the line width of the second signal transmission line 232 is set in the bending region 21 to be larger, the second signal transmission line 23 does not block the light emitted by the display panel, and normal display of the display panel is not affected.
Optionally, the signal transmission line 23 provided in the embodiment of the present invention may include at least one of a data signal transmission line, a scanning signal transmission line, a voltage signal transmission line, and a touch signal transmission line, which is not limited in the embodiment of the present invention.
Fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present invention, and referring to fig. 10, the display device 100 may include the display panel 101 according to any embodiment of the present invention. The display device 100 may be a mobile phone as shown in fig. 10, or may be a computer, a television, an intelligent wearable display device, and the like, which is not particularly limited in this embodiment of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (17)
1. A display panel characterized by comprising a flat region and a curved region curved with respect to the flat region;
the display panel further includes:
a substrate base plate;
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 region and a plurality of second signal transmission lines formed in the curved region, the first signal transmission lines and the second signal transmission lines extending in the same direction; the plurality of pixel circuits includes a plurality of first pixel circuits formed in the flat region and a plurality of second pixel circuits formed in the curved region;
a plurality of first signal lines connected to the pixel circuits formed on one side of the substrate base plate, the direction in which the first signal lines extend crossing the direction in which the signal transmission lines extend;
the second signal transmission line includes a wide portion and a narrow portion arranged in a direction in which the signal transmission line extends, the first signal line and the narrow portion overlapping in a direction perpendicular to a plane in which the display panel is located;
the signal transmission line comprises a voltage signal transmission line;
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 in a direction in which the first signal line extends, the signal transmission lines other than the first column and the last column include a plurality of pairs of adjacent signal transmission lines, the wide portions of the plurality of pairs of adjacent signal transmission lines being disposed facing in an orientation direction;
the wide portions of the two signal transmission lines of the first column and the last column are disposed facing away from each other.
3. The display panel according to claim 1, wherein the flat region includes a first flat region and a second flat region, and the curved region includes at least a first curved region, a second curved region, and a third curved region in an extending direction of the signal transmission line;
wherein the second bending region is located at a middle position of the bending region along an extending direction of the signal transmission line;
the first and second flat regions are symmetric about the second curved region;
the first bending region and the third bending region are symmetrical with respect to the second bending region.
4. The display panel according to claim 3, wherein in an extending direction of an intersection between the curved region and the flat region, a line width of the first signal transmission line in the first flat region is d1, a line width of the first signal transmission line in the second flat region is d2, a line width of the second signal transmission line in the first curved region is d3, a line width of the second signal transmission line in the second curved region is d4, and a line width of the second signal transmission line in the third curved region is d 5;
wherein d1 ═ d2< d 3; d3 ═ d5< d 4.
5. The display panel of claim 4, wherein 1.5d1 ≦ d3 ≦ 2.5d 1; 1.2d3 is not less than d5 is not less than 2d 3.
6. The display panel according to claim 1, wherein an angle between a direction in which the first signal transmission line and the second signal transmission line extend and a direction in which an intersection between the curved region and the flat region extends is θ, wherein θ is 45 ° ≦ θ ≦ 90 °.
7. The display panel according to claim 1, further comprising a plurality of organic light emitting cells located on a side of the pixel circuit away from the substrate base, the plurality of organic light emitting cells being arranged in a matrix in an extending direction of the signal transmission line and in a direction perpendicular to the extending direction of the signal transmission line; the plurality of organic light emitting units include a first organic light emitting unit formed in the flat region and a second organic light emitting unit formed in the curved region;
wherein the first organic light emitting unit includes a first anode electrode, and the second organic light emitting unit includes a second anode electrode; the number of the first anode electrodes is the same as the number of the second anode electrodes in a direction perpendicular to the extending direction of the signal transmission line.
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, further comprising a plurality of organic light emitting cells arranged in a matrix on a side of the pixel circuit remote from the substrate base, the plurality of organic light emitting cells being arranged in a matrix in a direction perpendicular to an extending direction of the signal transmission line and an extending direction of the signal transmission line; the plurality of organic light emitting units include a third organic light emitting unit formed in the flat region and a fourth organic light emitting unit formed in the curved region;
wherein the third organic light emitting unit includes a third anode electrode, and the fourth organic light emitting unit includes a fourth anode electrode; the number of the third anode electrodes is greater than the number of the fourth anode electrodes in a direction perpendicular to the extending direction of the signal transmission line.
11. The display panel according to claim 10, wherein a perpendicular projection of the third anode electrode on the substrate base plate is smaller than a perpendicular projection of the fourth anode electrode on the substrate base plate.
12. The display panel according to claim 3, further comprising a plurality of organic light emitting cells arranged in a matrix on a side of the pixel circuit remote from the substrate base, the plurality of organic light emitting cells being arranged in a matrix in a direction perpendicular to an extending direction of the signal transmission line and an extending direction of the signal transmission line; the plurality of organic light emitting units includes a fifth organic light emitting unit formed within the first flat region, a sixth organic light emitting unit formed within the second flat region, a seventh organic light emitting unit formed within the first curved region, an eighth organic light emitting unit formed within the second curved region, and a ninth organic light emitting unit formed within the third curved region;
wherein the fifth organic light emitting unit comprises a fifth anode electrode, the sixth organic light emitting unit comprises a sixth anode electrode, the seventh organic light emitting unit comprises a seventh anode electrode, the eighth organic light emitting unit comprises an eighth anode electrode, and the ninth organic light emitting unit comprises a ninth anode electrode;
the number of the fifth anode electrodes is the same as that of the sixth anode electrodes and is larger than that of the seventh anode electrodes along the direction perpendicular to the extending direction of the signal transmission line; the number of the seventh anode electrodes is the same as the number of the ninth anode electrodes and is greater than the number of the eighth anode electrodes.
13. The display panel according to claim 12, wherein a vertical projection of the fifth anode electrode and the sixth anode electrode on the substrate base plate is the same and smaller than a vertical projection of the seventh anode electrode on the substrate base plate; the vertical projection of the seventh anode electrode and the ninth anode electrode on the substrate base plate is the same and smaller than the vertical projection of the eighth anode electrode on the substrate base plate.
14. The display panel according to any one of claims 7, 10, and 12, further comprising 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 base plate covers the vertical projection of the second signal transmission line on the substrate base plate.
15. The display panel according to claim 1, wherein a via structure is formed on the second signal transmission line, and an aperture of the via structure is smaller than a 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 by comprising the display panel according to any one of claims 1 to 16.
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| CN202111039779.4A CN114203764A (en) | 2018-07-24 | 2018-07-24 | Display panel and display device |
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| CN202111039779.4A CN114203764A (en) | 2018-07-24 | 2018-07-24 | Display panel and display device |
| CN201810817830.1A CN109037281B (en) | 2018-07-24 | 2018-07-24 | Display panel and display device |
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| CN109166866B (en) * | 2018-08-28 | 2020-12-04 | 武汉天马微电子有限公司 | Display panel and display device |
| US11500433B2 (en) * | 2020-01-14 | 2022-11-15 | Au Optronics Corporation | Flexible electronic device |
| TWI761015B (en) * | 2020-12-31 | 2022-04-11 | 友達光電股份有限公司 | Flexible display module |
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| US9076768B2 (en) * | 2011-05-16 | 2015-07-07 | Georgia Tech Research Corporation | Systems and methods for producing low work function electrodes |
| CN103926774B (en) * | 2014-04-02 | 2016-11-16 | 京东方科技集团股份有限公司 | Array base palte, flexible display device and electronic equipment |
| US9349758B2 (en) * | 2014-09-30 | 2016-05-24 | Lg Display Co., Ltd. | Flexible display device with divided power lines and manufacturing method for the same |
| KR102505585B1 (en) * | 2015-12-31 | 2023-03-02 | 엘지디스플레이 주식회사 | Organic light emitting display panel and organic light emitting display device |
| CN106486500B (en) * | 2016-12-28 | 2018-11-16 | 京东方科技集团股份有限公司 | Flexible array substrate and its manufacturing method, flexible display panels and display device |
| CN107293570B (en) * | 2017-05-12 | 2019-10-22 | 上海天马微电子有限公司 | Display panel and display device |
| CN108231854B (en) * | 2018-01-05 | 2020-07-24 | 上海天马微电子有限公司 | Flexible display substrate, flexible display panel and flexible display device |
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