CN113053920B - Display substrate and display device - Google Patents
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- CN113053920B CN113053920B CN202110270422.0A CN202110270422A CN113053920B CN 113053920 B CN113053920 B CN 113053920B CN 202110270422 A CN202110270422 A CN 202110270422A CN 113053920 B CN113053920 B CN 113053920B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/124—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits
- H01L27/1244—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits for preventing breakage, peeling or short circuiting
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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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- 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
- G09F9/33—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 being semiconductor devices, e.g. diodes
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
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Abstract
The invention provides a display substrate and a display device, and belongs to the technical field of display. The display substrate comprises a display area and a non-display area which is located on the periphery of the display area, the non-display area comprises a bending area, the bending area is far away from the display area, the bending area comprises a bending starting area, a bending middle area and a bending ending area, the display substrate comprises a signal routing wire which extends from the display area to the bending area, the signal routing wire comprises a first part located in the bending starting area, a second part located in the bending middle area and a third part located in the bending ending area, the hollow proportion of the second part is larger than that of the first part and that of the third part, and the hollow proportion is the proportion of the hollow area to the total area. The technical scheme of the invention can avoid the signal wire in the bending area from being broken or cracked.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display substrate and a display device.
Background
With the progress of the technology and the improvement of the user demand, it is very important to further narrow the frame of the electronic display product, especially for the OLED (organic light emitting diode) display device, bending the non-display area of the flexible OLED display substrate is the most common means for reducing the frame of the display device, and reducing the bending radius is a necessary path for further reducing the frame.
In order to reduce the stress between films, the metal wires in the bending area are etched in the related art, but the strength of the metal wires after etching is reduced, so that the metal wires in the bending area are easy to break or crack, and then, poor effects such as bright lines of a screen are caused.
Disclosure of Invention
The invention provides a display substrate and a display device, which can avoid the signal wires in a bending area from being broken or cracked.
To solve the above technical problem, embodiments of the present invention provide the following technical solutions:
in one aspect, a display substrate is provided, which includes a display area and a non-display area located at the periphery of the display area, the non-display area includes a bending area, the bending area includes a bending starting area, a bending middle area and a bending ending area, the display substrate includes a signal trace extending from the display area to the bending area, the signal trace includes a first portion located in the bending starting area, a second portion located in the bending middle area and a third portion located in the bending ending area, the hollow ratio of the second portion is greater than that of the first portion and that of the third portion, and the hollow ratio is the ratio of the hollow area to the total area.
In some embodiments, the signal trace located in the bending region further includes a fourth portion located on a side of the first portion away from the second portion, and a fifth portion located on a side of the third portion away from the second portion, where a hollow ratio of the fourth portion is greater than a hollow ratio of the first portion, and a hollow ratio of the fifth portion is greater than a hollow ratio of the third portion.
In some embodiments, the first portion and the third portion are absent of a hollowed-out region.
In some embodiments, the first portion, the second portion, and the third portion each include a plurality of hollowed-out holes, the size of the hollowed-out holes of the second portion being greater than the size of the hollowed-out holes of the first portion and the third portion.
In some embodiments, in the first portion, the area of the hollowed-out hole is gradually increased along the direction away from the center of the first portion; and/or
In the third part, along the direction of keeping away from the third part center, the area of fretwork hole increases gradually.
In some embodiments, the display substrate comprises a bending radius definition layer, a bottom protection layer, a signal routing layer and a top protection layer in a direction away from a substrate base plate of the display substrate, and the bending radius definition layer of the bending region is removed.
In some embodiments, the length of the bending region in a first direction is determined by a bending radius of the display substrate and thicknesses of the bottom protection layer, the signal trace layer and the top protection layer, and the first direction is an extending direction of the signal trace.
In some embodiments, the lengths of the first portion and the third portion in a first direction are determined by the thicknesses of the bend radius defining layer, the bottom protection layer, the signal trace layer, and an angle and a bend radius between a side surface of the bend radius defining layer and the substrate base plate, and the first direction is an extending direction of the signal trace.
In some embodiments, the length of the second portion in the first direction depends on the thickness of the bend radius defining layer, the angle between the side surface of the bend radius defining layer and the substrate base plate, and the length of the bend region in the first direction, which is the extending direction of the signal traces.
Embodiments of the present invention also provide a display device, including the display substrate as described above.
The embodiment of the invention has the following beneficial effects:
in the above scheme, the signal is walked including the first part that is located the initial zone of buckling, be located the second part of the middle zone of buckling and be located the third part of the end zone of buckling, the fretwork proportion of second part is greater than the fretwork proportion of first part and the fretwork proportion of third part, the fretwork proportion is the proportion of fretwork area and total area, the first part and the third part of signal line can have better intensity like this, the second part helps reducing the stress between the rete simultaneously, can strengthen the intensity of signal line of rete structure abrupt change district when reducing the stress between the rete like this, can avoid signal line to take place to break or produce the crackle and cause the bad scheduling problem of bright line in this district.
Drawings
FIG. 1 is a schematic view of a display substrate;
FIG. 2 is a schematic view illustrating a substrate being bent;
FIGS. 3 and 4 are schematic cross-sectional views illustrating bending regions of a substrate;
FIG. 5 is a diagram illustrating signal traces in a kink region according to the related art;
FIGS. 6 and 7 are schematic diagrams of signal traces in the bending region according to the embodiment of the invention;
FIG. 8 is a schematic length diagram of a bending zone according to an embodiment of the present invention;
FIG. 9 is a schematic thickness diagram of each film layer in the bending region according to an embodiment of the present invention;
fig. 10 is a schematic illustration of the lengths of the first and second portions of an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following detailed description is made with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the display substrate includes a display area 1 and a non-display area 2, and the non-display area 2 includes a connection area 21, a bending area 22, and a signal input area 23. In order to reduce the screen ratio occupied by the non-display area 2, as shown in fig. 2, the flexible display substrate usually bends the non-display area 2 to the back. As shown in fig. 3, the main film structures of the Bending region include a Bending radius defining layer 32, a Bending Spacer layer 31, a bottom protection layer 33, a signal routing layer 34, a top protection layer 35, and a protection adhesive layer 36, wherein signal routing in the signal routing layer is for signal transmission. As shown in fig. 4, the bending region 22 includes: a bending front end region 41, a bending start region 42, a bending middle region 43, a bending end region 44 and a bending end region 45.
In an actual bending process, common defects are signal wire breakage and Peeling (Peeling) between films, and when a bending radius is reduced, stress and strain are increased, so that the defect problem is more obvious. In order to reduce the stress between the films and prevent the films from Peeling, pattern is usually etched on the signal traces, as shown in fig. 5. However, after the Pattern is etched, the metal strength is reduced, which causes the defects of signal routing fracture or microcrack generation in the bending initial region and the bending finishing region due to abrupt change of the film layer structure, thereby causing bright lines of the screen and the like.
Embodiments of the present invention provide a display substrate and a display device, which can prevent signal traces in a bending region from being broken or cracked.
An embodiment of the present invention provides a display substrate, including a display area and a non-display area located at a periphery of the display area, where the non-display area includes a bending area, and the bending area includes a bending start area, a bending middle area, and a bending end area along a direction away from the display area, and the display substrate includes a signal trace extending from the display area to the bending area, as shown in fig. 6 and 7, where the signal trace includes a first portion 52 located at the bending start area, a second portion 53 located at the bending middle area, and a third portion 54 located at the bending end area, and a hollow ratio of the second portion 53 is greater than hollow ratios of the first portion 52 and the third portion 54, and the hollow ratio is a ratio of a hollow area to a total area.
In this embodiment, the signal trace includes the first part that is located the initial zone of buckling, the second part that is located the middle zone of buckling and the third part that is located the end zone of buckling, the fretwork proportion of second part is greater than the fretwork proportion of first part and the fretwork proportion of third part, the fretwork proportion is the proportion of fretwork area and total area, the first part and the third part of signal trace can have better intensity like this, the second part helps reducing the stress between the rete simultaneously, can strengthen the intensity of signal trace of membranous layer structure abrupt change district when reducing the stress between the rete like this, can avoid signal trace to take place to break or produce the crackle and cause the bad scheduling problem of bright line in this district.
As shown in fig. 4, the bending region 22 includes: a bending front end region 41, a bending start region 42, a bending middle region 43, a bending end region 44 and a bending end region 45. In the bending starting area 42 and the bending ending area 44, the bending radius defining layer 32 is removed, the film layer structure of the bending area is subjected to sudden change, and in the film layer structure sudden change area, the hollow proportions of the first part and the third part are small, so that the structural strength of the first part and the third part can be ensured, and the signal routing is prevented from cracking or breaking in the film layer structure sudden change area; in the bending middle area 43, the film structure of the bending area is not changed, the requirement on the strength of signal wiring is lower, the hollow proportion of the second part is larger, the stress between films can be reduced, and the films are prevented from Peeling.
In some embodiments, as shown in fig. 6 and fig. 7, the signal trace located in the bending area further includes a fourth portion 51 located on a side of the first portion away from the second portion, and a fifth portion 55 located on a side of the third portion away from the second portion, where a hollow ratio of the fourth portion 51 is greater than that of the first portion 52, and a hollow ratio of the fifth portion 55 is greater than that of the third portion 54.
In this embodiment, the fourth portion 51 is located in the bending front end region 41, the fifth portion 55 is located in the bending end region 45, and in these two regions, the film layer structure of the bending region does not change, the requirement on the strength of signal routing is relatively low, and the hollow proportion of the fourth portion 51 and the fifth portion 55 is relatively large, so that the stress between films can be reduced, and the films are prevented from Peeling.
In this embodiment, after the signal trace is patterned, a plurality of hollow areas are formed on the signal trace, and the hollow areas may be quadrilateral, circular, oval, or the like. As shown in fig. 5, a plurality of oval hollow areas are formed on the signal traces.
In this embodiment, the signal trace may be made of a metal with good conductivity, such as aluminum, silver, copper, molybdenum, or an alloy, or may be made of a transparent conductive material. The signal traces may have a single-layer structure, or may have a multi-layer structure, such as a Mo/Al/Mo three-layer structure.
In this embodiment, the signal traces may be gate lines, data lines, or other traces for displaying normal operation of the substrate.
In this embodiment, in order to realize that the hollow ratio of the second portion 53 is greater than the hollow ratio of the first portion 52 and the hollow ratio of the third portion 54, as shown in fig. 6, a plurality of hollow areas may still be provided in the second portion, and no hollow area is provided in the first portion 52 and the third portion 54, so that the hollow ratios of the first portion 52 and the third portion 54 are 0, and thus the hollow ratio of the first portion 52 and the hollow ratio of the third portion 54 are smaller than the hollow ratio of the second portion 53.
In order to further reduce the stress between the films, as shown in fig. 6, a plurality of hollowed-out regions are disposed in the fourth portion 51 and the fifth portion 55, and the hollowed-out proportion of the fourth portion 51 and the fifth portion 55 may be slightly greater than that of the second portion 53, may also be slightly smaller than that of the second portion 53, and may also be equal to that of the second portion 53.
In the embodiment, pattern etching is performed in the bending front end region, the bending middle region and the bending tail end region of the signal wire, and Pattern etching in the bending starting region and the bending ending region is cancelled, so that stress between films is reduced, the signal wire strength of a film structure mutation region is enhanced, and the problems that the signal wire cracks in the region to cause poor bright lines and the like can be avoided.
In fig. 6, the hollow-out area is illustrated as an ellipse, but the hollow-out area is not limited to an ellipse, and may be a regular figure such as a circle or a rectangle, or may be an irregular figure. The hollow areas may be arranged in an array in the second portion 53, the fourth portion 51 and the fifth portion 55, or may be arranged irregularly in the second portion 53, the fourth portion 51 and the fifth portion 55. In order to ensure that the signal traces are uniformly stressed when the display substrate is bent, the hollow areas are preferably arranged in an array in the second portion 53, the fourth portion 51 and the fifth portion 55, and the hollow areas are regular patterns, such as ellipses and circles.
In the embodiment, in the film layer structure mutation area, the first part and the third part do not have hollow areas, so that the structural strength of the first part and the third part can be ensured, and the signal routing is prevented from cracking or breaking in the film layer structure mutation area; in the bending middle area 43, the film structure of the bending area is not changed, the requirement on the strength of signal wiring is lower, and the hollow proportion of the second part is larger, so that the stress between films can be reduced, and the film Peeling is prevented.
In this embodiment, in order to realize that the hollow ratio of the second portion 53 is greater than the hollow ratio of the first portion 52 and the hollow ratio of the third portion 54, as shown in fig. 7, a plurality of hollow holes (i.e., hollow areas) may be disposed in each of the first portion, the second portion, and the third portion, but the size of the hollow holes of the second portion 53 is greater than the size of the hollow holes of the first portion 52 and the third portion 54, so as to realize that the hollow ratio of the first portion 52 and the hollow ratio of the third portion 54 are smaller than the hollow ratio of the second portion 53.
In order to further reduce the stress between the films, as shown in fig. 7, a plurality of hollow-out regions are disposed in the fourth portion 51 and the fifth portion 55, and the hollow-out proportion of the fourth portion 51 and the fifth portion 55 may be slightly greater than that of the second portion 53, may also be slightly smaller than that of the second portion 53, and may also be equal to that of the second portion 53.
In fig. 7, the hollow area is illustrated as an ellipse, and of course, the hollow area is not limited to an ellipse, and may be a regular figure such as a circle or a rectangle, or may be an irregular figure. The hollow areas may be arranged in an array in the first portion 52, the second portion 53, the third portion 54, the fourth portion 51 and the fifth portion 55, or may be irregularly arranged in the first portion 52, the second portion 53, the third portion 54, the fourth portion 51 and the fifth portion 55. In order to ensure that the signal traces are uniformly stressed when the display substrate is bent, the hollow areas are preferably arranged in an array in the first portion 52, the second portion 53, the third portion 54, the fourth portion 51 and the fifth portion 55, and the hollow areas are in a regular pattern, such as an ellipse or a circle.
In order to ensure that the signal wires are stressed uniformly when the display substrate is bent, the first part and the third part are axisymmetric patterns which are symmetrical relative to the central axis of the second part, and the central axis is vertical to the extending direction of the signal wires.
In the embodiment, in the film layer structure mutation area, the proportion of the hollow areas of the first part and the third part is small, so that the structural strength of the first part and the third part can be ensured, and the signal routing is prevented from cracking or breaking in the film layer structure mutation area; in the bending middle area 43, the film structure of the bending area is not changed, the requirement on the strength of signal wiring is lower, and the hollow proportion of the second part is larger, so that the stress between films can be reduced, and the film Peeling is prevented.
In order to ensure uniform transition of the stress of the signal traces when the display substrate is bent, as shown in fig. 7, in the first portion 52, the area of the hollow hole is gradually increased along the direction away from the center of the first portion; and/or, in the third portion 54, the area of the hollowed-out hole is gradually increased along the direction away from the center of the third portion.
The display substrate is simulated, and the simulation result shows that the large corresponding displacement of the bending area has three positions of U, M and D, as shown in FIG. 4. Taking the signal trace as shown in fig. 5 as an example, at U, the maximum Strain value of the signal trace layer is 3.4%, and at M, the maximum Strain value of the signal trace layer is 2.8%; taking the signal traces as shown in fig. 6 as an example, the maximum Strain value of the signal routing layer at U is 2.9%, and the maximum Strain value of the signal routing layer at M is 3.0%, it can be seen that the difference between the Strain values at U, D, and M of the display substrate of this embodiment and the Strain values at M of the conventional flexible display substrate is not great.
In this embodiment, the display substrate includes a Bending radius definition layer 32, a Bending Spacer layer 31, a bottom protection layer 33, a signal trace layer 34, a top protection layer 35, and a protection adhesive layer 36 along a direction of the substrate away from the display substrate, the Bending radius definition layer 32 of the Bending region is removed, the edge of the Bending radius definition layer 32 is located in a Bending start region 42 and a Bending end region 44, and the Bending radius definition layer 32 does not exist in a Bending middle region.
In this embodiment, as shown in fig. 8, a length S of the bending region in a first direction is determined by a bending radius r of the display substrate and thicknesses of the bottom protection layer, the signal trace layer, and the top protection layer, where the first direction is an extending direction of the signal trace.
Specifically, S = pi + r + (h 1+ h2+ h 3)/2 + b, as shown in fig. 9, h1, h2, and h3 are the thicknesses of the bottom protective layer, the signal routing layer, and the top protective layer, respectively, and b is a process margin parameter.
Of course, the relationship of S to r, h1, h2, and h3 may also be expressed in other forms.
And determining the length of the bending area in the first direction according to the bending radius r and the thicknesses of the bottom protection layer, the signal wiring layer and the top protection layer, so that the structural strength of the signal wiring in the bending area can be ensured, and the stress of the bending area can be reduced.
In some embodiments, as shown in fig. 9 and 10, the length L of the first portion and the third portion in the first direction depends on the thicknesses of the bending radius defining layer, the bottom protection layer, the signal trace layer, and also depends on an angle a and a bending radius r between a side surface of the bending radius defining layer and the substrate base plate, the first direction is an extending direction of the signal trace, and a can also be expressed as an angle of notching the bending radius defining layer with a laser.
Specifically, L = h tan (a-90) + c + d (h 1+ h 2) + e/r, where h is the thickness of the bend radius defining layer and c, d, e are the process margin parameters.
Of course, the relationship of L to r, h1, h2 may also be expressed in other forms.
Determining the lengths of the first part and the third part in the first direction according to the bending radius definition layer, the bottom protection layer, the thickness of the signal routing layer, the angle a between the side surface of the bending radius definition layer and the substrate base plate and the bending radius r, so that the structural strength of the signal routing in the bending area can be ensured, and the stress of the bending area can be reduced.
In some embodiments, as shown in fig. 9 and 10, a length 2d of the second portion in the first direction depends on a thickness h of the bending radius definition layer, an angle a between a side surface of the bending radius definition layer and the substrate base plate, and a length S of the bending region in the first direction, which is an extending direction of the signal trace.
Specifically, d = (S/2) -h = (a-90).
Of course, the relationship of d to S, h, a may also be expressed in other forms.
And determining the length of the second part in the first direction according to the thickness h of the bending radius definition layer, the angle a between the side surface of the bending radius definition layer and the substrate base plate and the length S of the bending area in the first direction, so that the structural strength of the signal routing in the bending area can be ensured, and the stress of the bending area can be reduced.
Embodiments of the present invention also provide a display device, including the display substrate as described above.
The display device includes but is not limited to: radio frequency unit, network module, audio output unit, input unit, sensor, display unit, user input unit, interface unit, memory, processor, and power supply. It will be appreciated by those skilled in the art that the above described configuration of the display device does not constitute a limitation of the display device, and that the display device may comprise more or less of the components described above, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the display device includes, but is not limited to, a display, a mobile phone, a tablet computer, a television, a wearable electronic device, a navigation display device, and the like.
The display device may be: the display device comprises a television, a display, a digital photo frame, a mobile phone, a tablet personal computer and any other product or component with a display function, wherein the display device further comprises a flexible circuit board, a printed circuit board and a back plate.
It should be noted that, in this specification, each embodiment is described in a progressive manner, and the same and similar parts between the embodiments are referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the embodiments, since they are substantially similar to the product embodiments, the description is simple, and the relevant points can be referred to the partial description of the product embodiments.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
It will be understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "under" another element, it can be "directly on" or "under" the other element or intervening elements may be present.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present disclosure, and shall cover the scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.
Claims (9)
1. A display substrate is characterized by comprising a display area and a non-display area located on the periphery of the display area, wherein the non-display area comprises a bending area, the bending area comprises a bending starting area, a bending middle area and a bending ending area along the direction far away from the display area, the display substrate comprises signal routing wires extending from the display area to the bending area, the signal routing wires comprise a first part located in the bending starting area, a second part located in the bending middle area and a third part located in the bending ending area, the hollow proportion of the second part is larger than that of the first part and that of the third part, and the hollow proportion is the proportion of the hollow area to the total area;
the first portion and the third portion each comprise a plurality of hollowed-out holes;
in the first part, the area of the hollow hole is gradually increased along the direction far away from the center of the first part; and/or
In the third part, along the direction of keeping away from the third part center, the area of fretwork hole increases gradually.
2. The display substrate according to claim 1, wherein the signal trace in the bending region further includes a fourth portion located on a side of the first portion away from the second portion, and a fifth portion located on a side of the third portion away from the second portion, wherein a hollow ratio of the fourth portion is greater than a hollow ratio of the first portion, and a hollow ratio of the fifth portion is greater than a hollow ratio of the third portion.
3. The display substrate of claim 1, wherein the first portion and the third portion are free of a hollowed-out region.
4. The display substrate according to claim 1, wherein the second portion comprises a plurality of hollowed-out holes, and the size of the hollowed-out holes of the second portion is larger than the size of the hollowed-out holes of the first portion and the third portion.
5. The display substrate of claim 1, wherein the display substrate comprises a bend radius defining layer, a bottom protective layer, a signal trace layer and a top protective layer in a direction away from a base substrate of the display substrate, and wherein the bend radius defining layer of the bend region is removed.
6. The display substrate of claim 5, wherein a length of the bending region in a first direction is determined by a bending radius of the display substrate and thicknesses of the bottom protection layer, the signal trace layer and the top protection layer, and the first direction is an extending direction of the signal trace.
7. The display substrate of claim 5, wherein the lengths of the first portion and the third portion in a first direction are determined by the thicknesses of the bending radius definition layer, the bottom protection layer, the signal trace layer, and an angle between a side surface of the bending radius definition layer and the substrate and a bending radius, and the first direction is an extending direction of the signal trace.
8. The display substrate of claim 5, wherein a length of the second portion in a first direction is determined by a thickness of the bending radius definition layer, an angle between a side surface of the bending radius definition layer and the substrate base plate, and a length of the bending region in the first direction, and the first direction is an extending direction of the signal trace.
9. A display device comprising the display substrate according to any one of claims 1 to 8.
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| CN202110270422.0A CN113053920B (en) | 2021-03-12 | 2021-03-12 | Display substrate and display device |
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| CN202110270422.0A CN113053920B (en) | 2021-03-12 | 2021-03-12 | Display substrate and display device |
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| CN113724597B (en) * | 2021-08-31 | 2023-11-14 | 京东方科技集团股份有限公司 | Display module and display device |
| CN115206199A (en) * | 2022-07-07 | 2022-10-18 | 武汉华星光电半导体显示技术有限公司 | Bending wiring and display panel |
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| CN106205394B (en) * | 2016-09-05 | 2020-05-22 | 京东方科技集团股份有限公司 | Flexible display panel, display device and manufacturing method |
| CN109215511B (en) * | 2018-10-22 | 2021-09-21 | 京东方科技集团股份有限公司 | Preparation method of flexible display panel, flexible display panel and display device |
| CN211087785U (en) * | 2020-02-17 | 2020-07-24 | 上海和辉光电有限公司 | Display panel |
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