CN112420953B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN112420953B CN112420953B CN202011294662.6A CN202011294662A CN112420953B CN 112420953 B CN112420953 B CN 112420953B CN 202011294662 A CN202011294662 A CN 202011294662A CN 112420953 B CN112420953 B CN 112420953B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/841—Self-supporting sealing arrangements
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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
Abstract
An embodiment of the present invention provides a display panel and a display device, the display panel has a display area, the display area includes a first display area adjacent to an outer edge of the display area, a second display area located on a side of the first display area facing a center of the display area, and a third display area located between the first display area and the second display area, the display panel includes: the light-emitting substrate comprises a substrate and a pixel definition layer arranged on the substrate, wherein the pixel definition layer comprises an isolation structure and a pixel opening formed by the isolation structure in a surrounding mode; the supporting structure comprises a plurality of supporting columns which are distributed in the display area at intervals, the supporting columns are distributed at intervals on one side of the isolation structure, which is far away from the substrate, and the extending height of the supporting columns in the third display area is larger than the extending height of the supporting columns in the first display area and the second display area in the thickness direction of the display panel; and the cover plate is positioned on one side of the support structure departing from the light-emitting substrate. The invention can improve the deformation of the cover plate and improve the display effect of the display panel.
Description
Technical Field
The invention relates to the technical field of display equipment, in particular to a display panel and a display device.
Background
Organic Light-Emitting diodes (OLEDs) are active Light-Emitting devices. Compared with the traditional Liquid Crystal Display (LCD) Display mode, the OLED Display technology does not need a backlight lamp and has the self-luminous characteristic. And can be made lighter and thinner, withstand a wider range of temperature variations than LCD display panels, and have a larger viewing angle. The OLED display panel is expected to become a next-generation flat panel display technology following the LCD, and is one of the technologies most receiving attention in the flat panel display technology at present.
The OLED display panel comprises a display substrate and a cover plate, wherein the display substrate is connected with the cover plate through a packaging structure. Be provided with the support column on the display substrate, the support column plays the effect of supporting the apron. The support posts in the prior art typically extend to a uniform height, resulting in a cover plate that is susceptible to deformation. The light of the display substrate is emitted through the cover plate, and the deformation of the cover plate can affect the display effect.
Therefore, a new display panel and a new display device are needed.
Disclosure of Invention
The embodiment of the invention provides a display panel and a display device, and aims to solve the problem that a cover plate of the display panel is easy to deform.
An embodiment of the first aspect of the present invention provides a display panel having a display area including a first display area adjacent to an outer edge thereof, a second display area located on a side of the first display area toward a center of the display area, and a third display area located between the first display area and the second display area, the display panel including: the light-emitting substrate comprises a substrate and a pixel definition layer arranged on the substrate, wherein the pixel definition layer comprises an isolation structure and a pixel opening formed by the isolation structure in a surrounding mode; the supporting structure comprises a plurality of supporting columns which are distributed in the display area at intervals, the supporting columns are distributed at intervals on one side of the isolation structure, which is far away from the substrate, and the extending height of the supporting columns in the third display area is larger than the extending height of the supporting columns in the first display area and the second display area in the thickness direction of the display panel; and the cover plate is positioned on one side of the support structure departing from the light-emitting substrate.
According to an embodiment of an aspect of the present invention, at least a part of the plurality of support columns is a first support column, the first support column includes:
the first support column is connected to the isolation structure through the connecting section;
strengthen the support section, be located the one side that the linkage segment deviates from isolation structure, strengthen the orthographic projection size of support section on isolation structure and be greater than the orthographic projection size of linkage segment on isolation structure.
According to an aspect of the invention in any of the previous embodiments, the reinforcing support section has a modulus of elasticity greater than the modulus of elasticity of the connecting section.
According to one aspect of the present invention in any one of the previous embodiments, the material of the reinforcing support section comprises a negative poisson's ratio material.
According to one aspect of the invention in any of the previous embodiments, the reinforcing strut section and the connecting section are interconnected by a transition section having a cross-sectional area that decreases in the direction from the reinforcing strut section to the connecting section.
According to one aspect of the present invention, in any one of the embodiments described above, the surface of the reinforcing support section facing away from the connecting section is provided with a groove, and the groove is formed by being recessed toward the connecting section.
According to an aspect of the invention in any one of the preceding embodiments, the orthogonal projection of the groove onto the isolation structure is in the shape of a straight line, a cross or a meter.
According to an aspect of the invention in any preceding embodiment, at least part of the first support column is located in the third display area.
According to an aspect of the invention in any of the preceding embodiments, at least part of the first support column is located in the second display area.
According to an aspect of the invention in any of the previous embodiments, at least part of the first support column is located in the first display area.
According to one aspect of the present invention, a plurality of support pillars are disposed in the first display area, and the extension heights of the support pillars in the first display area are gradually reduced in a direction from the third display area to the first display area.
According to one aspect of the present invention, in any one of the embodiments, the first display area has a first extending height difference between two adjacent supporting pillars, and the first extending height difference is inversely proportional to the extending width of the first display area.
According to one aspect of the present invention, in any one of the embodiments, the first extension height difference has a value ranging from 0.1 μm to 0.2 μm, and the extension width of the first display region has a value ranging from 2.2mm to 2.8 mm.
According to one aspect of the present invention, a plurality of support pillars are disposed in the second display area, and the extension heights of the support pillars in the second display area are gradually reduced in a direction from the third display area to the second display area.
According to one aspect of the present invention, in any one of the embodiments, the second display area has a second extending height difference between two adjacent supporting pillars, and the second extending height difference is inversely proportional to the extending width of the second display area.
According to one aspect of any one of the preceding embodiments of the invention, the second extension height difference ranges from 0.01 μm to 0.07 μm;
according to an aspect of the invention in any one of the preceding embodiments, the difference between the extended width of the second display area and the total width of said display area is 6.4mm to 7.6 mm.
According to an aspect of the invention in any of the preceding embodiments, the first extended height difference is greater than the second extended height difference.
According to one aspect of the present invention, in any one of the embodiments, the minimum extension height of the support pillars in the first display area is smaller than the minimum extension height of the support pillars in the second display area.
According to one aspect of the present invention in any one of the preceding embodiments, the minimum extension height of the support pillars in the first display region is 0.1 μm to 0.2 μm.
According to one aspect of the present invention in any one of the preceding embodiments, the minimum extension height of the support pillars in the second display area is 1.5 μm to 1.6 μm.
According to one aspect of the present invention, in any of the embodiments, the display area further includes a fourth display area, and the second display area surrounds the fourth display area;
a plurality of support columns are arranged in the fourth display area, and the extension height of the support columns in the fourth display area is smaller than or equal to the extension height of all the support columns in the second display area.
According to one aspect of the present invention, in any one of the embodiments, the plurality of support pillars in the fourth display area extend to the same height.
Embodiments of the second aspect of the present invention further provide a display device, which includes the display panel of any one of the embodiments of the first aspect.
In the display panel of the embodiment of the invention, the display panel includes a light emitting substrate, a support structure and a cover plate. The support structure is used for supporting the cover plate so as to prevent the cover plate from contacting with the light-emitting substrate to influence the light emission of the light-emitting substrate. And the support column of the support structure is positioned at one side of the isolation structure deviating from the substrate, and the support column can not influence the light-emitting effect of the display panel. The extending heights of the supporting columns in the third display area are larger than those of the supporting columns in the first display area and the second display area, so that the supporting columns in the third display area can provide better support for the cover plate, the deformation of the cover plate is improved, and the display effect of the display panel is improved.
Drawings
Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings in which like or similar reference characters refer to the same or similar parts.
Fig. 1 is a top view of a display panel according to an embodiment of the first aspect of the present invention;
fig. 2 is a partial cross-sectional view of a display panel according to an embodiment of the first aspect of the present invention;
FIG. 3 is another partial cross-sectional view of a display panel according to an embodiment of the first aspect of the present invention;
fig. 4 is a schematic structural diagram of a supporting column of a display panel according to an embodiment of the first aspect of the present invention;
fig. 5 is a schematic structural diagram of a supporting column of a display panel according to another embodiment of the first aspect of the present invention;
fig. 6 is a schematic structural diagram of a groove 214 of a support pillar on a display panel according to an embodiment of the first aspect of the present invention;
fig. 7 is a schematic structural diagram of a groove 214 of a support pillar on a display panel according to another embodiment of the first aspect of the present invention;
FIG. 8 is a diagram illustrating a height distribution of support pillars on a display panel according to an embodiment of the present invention;
fig. 9 is a partially enlarged schematic view of fig. 8.
Description of reference numerals:
10. a display panel;
100. a light-emitting substrate; 110. a substrate; 120. a pixel defining layer; 121. an isolation structure; 122. a pixel opening; 130. a packaging structure;
200. a support structure; 200a, a support column; 210. a first support column; 211. a connecting section; 212. a reinforcing support section; 213. a transition section; 214. a groove; 220. a second support column;
300. a cover plate;
AA1, first display area; AA2, second display area; AA3, third display area; AA4, fourth display area.
Detailed Description
Features of various aspects and exemplary embodiments of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, as used herein, refer to orientations or positional relationships and are used merely to facilitate description of the invention and to simplify the description, but do not indicate or imply that the device or element so referred to must be oriented, constructed, and operated in a particular orientation and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The directional terms appearing in the following description are intended to be illustrative in all directions, and are not intended to limit the specific construction of embodiments of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
The OLED display panel comprises a display substrate and a cover plate, wherein the display substrate is connected with the cover plate through an edge packaging structure. In addition, in order to prevent the middle parts of the display substrate and the cover plate from contacting with each other, a support column with a certain extending height is arranged on the display substrate to play a role of supporting the cover plate, so that the cover plate is prevented from damaging the light-emitting device.
In the prior art, the extending heights of the plurality of support columns disposed on the display substrate are generally consistent. However, after the display panel is used for a period of time, a newton ring phenomenon occurs, that is, a circle of abnormal display ring-shaped area appears in an area of the display panel close to the edge, which seriously affects the display effect of the display panel and the service life of the display panel.
The inventors found through research that this is because of display abnormality caused by deformation of the cover plate after a period of use. After the display substrate is used for a period of time, the cover plate generates deformation similar to a bathtub curve under the action of gravity and atmospheric pressure, and the cover plate can be sunken towards the display substrate to form a curved surface with a certain curvature radius. When light irradiates the display substrate from the cover plate, the optical path difference of different light beams in a microcavity formed between the cover plate and the display substrate is different, and reflected light generated on the upper surface and the lower surface of the cover plate and the display substrate interferes with each other, so that a Newton ring phenomenon appears on the display panel, and the display effect of a product is influenced. The inventor further researches and discovers that the Newton ring phenomenon occurs because the cover plate of the region where the Newton ring is located is sunken towards the display substrate, and display abnormality occurs at the position.
The present invention is proposed to solve the above-mentioned technical problems. For better understanding of the present invention, the display panel 10 and the display device according to the embodiment of the present invention are described in detail below with reference to fig. 1 to 9.
Referring to fig. 1, fig. 1 is a top view of a display panel 10 according to an embodiment of the first aspect of the present invention.
According to the display panel 10 provided by the embodiment of the first aspect of the present invention, the display panel 10 has a display area, and the display area includes a first display area AA1 adjacent to an outer edge thereof, a second display area AA2 located at a side of the first display area AA1 toward a center of the display area, and a third display area AA3 located between the first display area AA1 and the second display area AA 2.
The first display area AA1 is adjacent to the outer edge of the display area, that is, the outer edge of the first display area AA1 is the outer edge of the display area, and the first display area AA1 is formed by extending from the outer edge of the display area to the central portion of the display area.
The sizes of the first display area AA1, the second display area AA2 and the third display area AA3 are not limited, and the sizes of the first display area AA1, the second display area AA2 and the third display area AA3 may be determined according to the newton ring phenomenon of the same kind of display panel 10 having the same display area size. The newton ring phenomenon generally occurs at a distance from the edge of the display area, i.e., the newton ring phenomenon generally occurs in the third display area AA 3. The display panels 10 of the same type having the same display area size refer to the display panels 10 having the same or similar display device structure, sub-pixel size, sub-pixel arrangement, and other parameters.
Referring to fig. 2, fig. 2 is a partial cross-sectional view of a display panel 10 according to an embodiment of the first aspect of the invention.
According to the display panel 10 provided by the embodiment of the present invention, the display panel 10 includes: the light-emitting substrate 100 includes a substrate 110 and a pixel defining layer 120 disposed on the substrate 110, wherein the pixel defining layer 120 includes an isolation structure 121 and a pixel opening 122 surrounded by the isolation structure 121; the supporting structure 200 includes a plurality of supporting pillars 200a spaced apart in the display area, the plurality of supporting pillars 200a are spaced apart on a side of the isolation structure 121 facing away from the substrate 110, and an extending height of the supporting pillars 200a in the third display area is greater than extending heights of the supporting pillars 200a in the first display area AA1 and the second display area AA2 in a thickness direction of the display panel 10; and a cover plate 300 positioned on a side of the support structure 200 facing away from the light emitting substrate 100.
In the display panel 10 according to the embodiment of the present invention, the display panel 10 includes the light emitting substrate 100, the support structure 200, and the cover plate 300. The supporting structure 200 of the present invention is used to support the cover plate 300, so as to prevent the cover plate 300 from contacting the light-emitting substrate 100 to affect the light emission of the light-emitting substrate 100. And the supporting pillars 200a of the supporting structure 200 are located on a side of the isolation structure 121 away from the substrate 110, the supporting pillars 200a do not affect the light emitting effect of the display panel 10. The extending height of the support pillars 200a in the third display area AA3 is greater than the extending height of the support pillars 200a in the first display area AA1 and the second display area AA2, so that the support pillars 200a in the third display area AA3 can provide better support for the cover plate 300, improve the deformation of the cover plate 300, further improve the newton ring phenomenon, and improve the display effect of the display panel 10.
Optionally, an array substrate 110 is further disposed on a side of the substrate 110 away from the pixel defining layer 120, and the array substrate 110 includes a driving circuit. Optionally, a first electrode is further disposed on a side of the pixel opening 122 facing the substrate 110, and a light emitting structure is disposed in the pixel opening 122.
Referring to fig. 3, fig. 3 is another partial cross-sectional view of the display panel 10 according to the first embodiment of the present invention.
In some embodiments, the display panel 10 further includes an encapsulation structure 130 disposed on the substrate 110 and located in the non-display region of the display panel 10. The package structure 130 is annular, and the plurality of supporting pillars 200a are located in the annular package structure 130. A schematic diagram of a portion of the package structure 130 is shown in fig. 3.
Referring to fig. 4 and 5 together, fig. 4 illustrates a schematic structural diagram of a supporting pillar 200a of a display panel 10 according to a first embodiment of the present invention, and fig. 5 illustrates a schematic structural diagram of a supporting pillar 200a of a display panel 10 according to another embodiment of the first aspect of the present invention.
The plurality of support columns 200a may have the same or different structures as long as the plurality of support columns 200a each provide support to the cover plate 300. For example, at least some of the support columns 200a of the plurality of support columns 200a are first support columns 210, and the first support columns 210 include: a connection section 211, through which the first support column 210 is connected to the isolation structure 121; and the reinforcing support section 212 is positioned on one side, away from the isolation structure 121, of the connecting section 211, and the orthographic projection size of the reinforcing support section 212 on the isolation structure 121 is larger than that of the connecting section 211 on the isolation structure 121.
In these alternative embodiments, the first supporting column 210 includes a connecting section 211 and a reinforcing supporting section 212, the reinforcing supporting section 212 has a larger size, and the reinforcing supporting section 212 can provide better support for the cover plate 300, improve the deformation of the cover plate 300 caused by the deformation of the supporting column 200a, further improve the newton ring phenomenon, and improve the display effect of the display panel 10.
In some embodiments, the reinforcing support section 212 and the connecting section 211 are interconnected by a transition section 213, the cross-sectional area of the transition section 213 decreasing in the direction from the reinforcing support section 212 to the connecting section 211. In these alternative embodiments, the reinforcing support section 212 is connected to the connecting section 211 through the transition section 213, and the cross-sectional area of the transition section 213 is gradually reduced, so that the reinforcing support section 212 is prevented from being easily deformed due to an abrupt change in size between the reinforcing support section 212 and the connecting section 211, the structural rigidity of the support column 200a can be further improved, the deformation of the cover plate 300 is improved, the newton ring phenomenon is improved, and the display effect of the display panel 10 is improved.
The thickness of the reinforcing support section 212 is not limited, and as shown in fig. 4, the thickness of the reinforcing support section 212 may be smaller; alternatively, as shown in FIG. 5, the thickness of the reinforcing support section 212 may be greater.
Alternatively, the cross-sectional area of the transition section 213 may taper linearly in the direction from the reinforcing support section 212 to the connecting section 211, i.e., the transition section 213 has a smooth outer surface. Alternatively, the cross-sectional area of the transition section 213 may taper non-linearly, such as concave or convex outer surfaces of the transition section 213.
Alternatively, the material of each section of the first support column 210 may be the same or different. For example, the first support column 210 is integrally formed of the same material.
In other alternative embodiments, the modulus of elasticity of the reinforcing support section 212 is greater than the modulus of elasticity of the connecting section 211. That is, the reinforcing support section 212 is less prone to deform relative to the connecting section 211 when receiving a force, so that the reinforcing support section 212 can provide better support for the cover plate 300, and meanwhile, damage of the connecting section 211 to the isolation structure 121 due to the fact that the rigidity of the connecting section 211 is too high is improved.
The material of the reinforcing support section 212 comprises, for example, a negative poisson's ratio material. When the reinforcing support section 212 is pressed, the reinforcing support section expands, so that the support effect of the support column 200a is improved, the deformation and the newton ring phenomenon of the cover plate 300 can be better improved, and the display effect of the display panel 10 is improved. In addition, the problem that the support columns 200a are scratched by the vapor deposition mask plate during vapor deposition in the manufacturing process of the display panel 10 can be avoided, and the yield of the display panel 10 is improved.
Optionally, the transition section 213 has a lower modulus of elasticity than the reinforcing support section 212. Alternatively, the modulus of elasticity of the transition section 213 may be less than or equal to the modulus of elasticity of the reinforcing support section 212, and the modulus of elasticity of the transition section 213 may also be greater than or equal to the modulus of elasticity of the connecting section 211.
When the support column 200a supports the cover plate 300, the reinforcing support section 212 and the cover plate 300 are directly connected in contact, and there may be mutual friction between the reinforcing support section 212 and the cover plate 300.
Referring to fig. 6 and 7 together, fig. 6 illustrates a schematic structural diagram of the groove 214 of the support post 200a on the display panel 10 according to the first embodiment of the present invention, and fig. 7 illustrates a schematic structural diagram of the groove 214 of the support post 200a on the display panel 10 according to another embodiment of the first aspect of the present invention.
In some alternative embodiments, the surface of the reinforcing support section 212 facing away from the connecting section 211 is formed with a groove 214, and the groove 214 is formed recessed toward the connecting section 211. In these alternative embodiments, the contact area between the reinforcing support section 212 and the cover plate 300 can be reduced by forming the groove 214 on the surface of the reinforcing support section 212 facing away from the connecting section 211. Thereby improving friction between the reinforcing support section 212 and the cover plate 300, and improving the service life and display effect of the display panel 10 due to the friction between the reinforcing support section 212 and the cover plate 300 during the assembly or use of the display panel 10.
The shape of the groove 214 may be set in various ways, and optionally, the orthographic projection of the groove 214 on the isolation structure 121 is in a straight line shape, a cross shape or a meter shape. In these alternative embodiments, the grooves 214 are relatively regular in shape and are easily machined.
The position of the first support column 210 is not limited, and the support capability of the display structure can be improved when the first support column 210 is disposed at any position of the display area.
Optionally, at least a portion of the first support column 210 is located in the third display area AA 3. Generally, the requirement of the display panel 10 on the carrying capacity of the third display area AA3 is high, and when the supporting column 200a of the third display area AA3 has insufficient structural rigidity and deforms, the cover plate 300 is likely to deform to generate a newton ring phenomenon. The arrangement of at least a portion of the first supporting pillars 210 in the third display area AA3 can improve the supporting capability of the supporting pillars 200a in the third display area AA3 for the cover plate 300, improve the deformation and newton ring phenomena of the cover plate 300, and improve the display effect of the display panel 10. Optionally, the supporting pillars 200a of the third display area AA3 are all the first supporting pillars 210.
Optionally, at least a portion of the first support column 210 is disposed in the second display area AA2 to improve the supporting ability of the support structure 200 in the second display area AA 2. Optionally, at least a portion of the first supporting pillar 210 is disposed in the first display area AA1 to improve the supporting capability of the supporting structure 200 in the first display area AA 1.
Optionally, the supporting columns 200a further include a second supporting column 220, and the second supporting column 220 is cylindrical, for example, the second supporting column 220 is cylindrical or prismatic.
In some embodiments, the first support column 210 is located in the third display area AA3, and the second support column 220 is located in the first display area AA1 and the second display area AA 2. In these alternative embodiments, the support capability of the first support column 210 is stronger than the support capability of the second support column 220, and the structure of the second support column 220 is simpler than the structure of the first support column 210. The first supporting pillars 210 are disposed in the third display area AA3, so that the supporting capability of the supporting structure 200 in the third display area AA3 can be improved, and the newton ring phenomenon can be improved. The second supporting pillars 220 are disposed in the first display area AA1 and the second display area AA2, so that the manufacturing difficulty of the display panel 10 can be reduced. Therefore, the embodiment of the invention can simplify the structure and the manufacturing process of the display panel 10 and improve the manufacturing efficiency of the display panel 10 on the premise of ensuring that the support structure 200 has sufficient support capability and improving the deformation and newton ring phenomena of the cover plate 300.
In other alternative embodiments, the first support column 210 is located in the third display area AA3 and the second display area AA2, and the second support column 220 is located in the first display area AA 1. When the first supporting pillars 210 are located in the third display area AA3, which is not enough to improve the newton ring phenomenon, the second supporting pillars 220 may be further disposed in the second display area AA2 to improve the supporting capability of the supporting structure 200, and improve the deformation of the cover plate 300 and the newton ring phenomenon.
Referring to fig. 8 and 9 together, fig. 8 is a diagram illustrating a height distribution of the support posts 200a on the display panel 10 according to the first embodiment of the present invention; fig. 9 is a partially enlarged schematic view of fig. 8.
The extending height of each supporting column 200a in the third display area AA3 may be consistent, so that the supporting columns 200a in the third display area AA3 can provide better support to the cover plate 300.
Alternatively, the extending heights of the plurality of supporting pillars 200a in the third display area AA3 may be different, for example, in the middle area of the third display area AA3, the extending height of the supporting pillar 200a is the highest, in the direction from the third display area AA3 to the second display area AA2, the extending height of the supporting pillar 200a in the third display area AA3 is gradually decreased, and/or, in the direction from the third display area AA3 to the first display area AA1, the extending height of the supporting pillar 200a in the third display area AA3 is gradually decreased. The extension height of the support column 200a in the third display area AA3 is gradually reduced, so that insufficient supporting force caused by sudden change of the extension height of the support column 200a can be avoided, and the cover plate 300 is easily deformed.
Alternatively, the extension height of the support posts 200a in the third display area AA3 is 1.6 μm to 2.1 μm. When the height of the supporting pillar 200a in the third display area AA3 is within the above range, the deformation and newton ring phenomena of the cover plate 300 can be improved, and the display effect of the display panel 10 can be improved.
The extending heights of the plurality of supporting pillars 200a in the first display area AA1 may be the same or different, and in some embodiments, the plurality of supporting pillars 200a are spaced apart in the first display area AA 1. For example, the plurality of supporting pillars 200a are distributed in rows and columns in the first display area AA1, and the extending heights of the plurality of supporting pillars 200a in the first display area AA1 are gradually reduced in the direction from the third display area AA3 to the first display area AA 1.
In these alternative embodiments, since the supporting pillars 200a of the third display area AA3 are higher than the supporting pillars 200a of the first display area AA1, the supporting pillars 200a of the third display area AA3 can provide better support, and the shorter supporting pillars 200a in the first display area AA1, which are farther from the third display area AA3, do not affect the support effect, and thus the material can be saved. The extending heights of the plurality of supporting pillars 200a in the first display area AA1 are gradually reduced, and it is also possible to prevent the cover plate 300 from being scratched or easily deformed due to the sudden height change of the supporting pillars 200a in the first display area AA 1.
In addition, the cover plate 300 is easy to tilt in the first display area AA1, and the extending heights of the plurality of supporting pillars 200a in the first display area AA1 are gradually reduced in the direction away from the third display area AA3, so that the tilting phenomenon of the cover plate 300 can be well improved, the deformation and newton ring phenomenon of the cover plate 300 can be further improved, and the display effect of the display panel 10 can be improved.
Optionally, two adjacent support pillars 200a in the first display area AA1 have a first extending height difference therebetween, and the first extending height difference is inversely proportional to the extending width of the first display area AA 1. When the width of the first display area AA1 is wider, the first extension height difference between two adjacent support pillars 200a in the first display area AA1 may be smaller. So as to improve the supporting capability of the supporting pillars 200a in the first display area AA1 and prevent the cover plate 300 from deforming in the first display area AA 1. When the width of the first display area AA1 is small, the first extension height difference between the adjacent two support posts 200a in the first display area AA1 may be large. When the width of the first display area AA1 is small, the possibility of deformation of the cover plate 300 in the first display area AA1 is small, and the height difference between two adjacent supporting pillars 200a in the first display area AA1 is large, so that the deformation of the cover plate 300 is not greatly influenced, and the purposes of saving materials and simplifying the structure of the display panel 10 can be achieved.
Optionally, the value range of the first extension height difference is 0.1 μm to 0.2 μm. For example, the first extension height difference may have a value in the range of 0.14 μm to 0.18. mu.m. When the value range of the first extending height difference is within the above range, not only the deformation of the cover plate 300 caused by insufficient supporting capability of the supporting column 200a in the first display area AA1 can be avoided, but also the purposes of saving materials and resources can be achieved.
Alternatively, the first display area AA1 may extend for a width of, for example, 2.2mm to 2.8 mm. The minimum extension height of the supporting pillars 200a in the first display area AA1 is 0.1 μm to 0.2 μm, for example, the minimum extension height of the supporting pillars 200a in the first display area AA1 is 0.14 μm to 0.18 μm. The maximum extension height of the supporting pillars 200a in the first display area AA1 is 1.6 μm to 2.1 μm.
Optionally, when the first display area AA1 includes more than three supporting pillars 200a, there are more than two first extending height differences, and the values of the more than two first extending height differences may be the same or different, as long as the height difference between two adjacent supporting pillars 200a in the first display area AA1 is in the range of 0.1 μm to 0.2 μm.
The extending heights of the plurality of support columns 200a in the second display area AA2 may be the same or different. In some alternative embodiments, a plurality of spaced apart support posts 200a are disposed within second display area AA 2. For example, a plurality of support columns 200a are arranged in rows and columns in the second display area AA 2. In the direction from the third display area AA3 to the second display area AA2, the extending heights of the plurality of supporting pillars 200a within the second display area AA2 are gradually reduced.
In these alternative embodiments, since the supporting pillar 200a of the third display area AA3 is higher than the supporting pillar 200a of the second display area AA2, the supporting pillar 200a of the third display area AA3 can provide better support, and the shorter supporting pillar 200a in the second display area AA2, which is farther from the third display area AA3, does not affect the support effect, and can save material. The extending heights of the plurality of supporting pillars 200a in the second display area AA2 are gradually reduced, and it is also possible to prevent the cover plate 300 from being scratched or easily deformed due to the abrupt height change of the supporting pillars 200a in the second display area AA 2. Therefore, in the direction from the third display area AA3 to the second display area AA2, the extending heights of the plurality of supporting pillars 200a in the second display area AA2 are gradually reduced, which does not affect the deformation of the cover plate 300, and achieves the purposes of saving materials and resources.
Optionally, a second extending height difference exists between two adjacent supporting pillars 200a in the second display area AA2, and the second extending height difference is inversely proportional to the extending width of the second display area AA 2. When the width of the second display area AA2 is wider, the second extension height difference between adjacent two support posts 200a in the second display area AA2 may be smaller. So as to improve the supporting capability of the supporting pillar 200a in the second display area AA2 and prevent the cover plate 300 from deforming in the second display area AA 2. When the width of the second display area AA2 is small, the second extension height difference between adjacent two support posts 200a in the second display area AA2 may be large. When the width of the second display area AA2 is small, the possibility of deformation of the cover plate 300 in the second display area AA2 is small, and the height difference between two adjacent supporting pillars 200a in the second display area AA2 is large, so that the deformation of the cover plate 300 is not greatly influenced, and the purposes of saving materials and simplifying the structure of the display panel 10 can be achieved.
Optionally, the value range of the second extension height difference is 0.01 μm to 0.07 μm. When the value range of the second extending height difference is within the above range, not only the deformation of the cover plate 300 caused by insufficient supporting capability of the supporting column 200a in the second display area AA2 can be avoided, but also the purposes of saving materials and resources can be achieved.
Optionally, the difference between the extended width of the second display area AA2 and the total width of said display areas is 6.4mm to 7.6 mm. For example, when the total width of the display areas is 69mm, the second display area AA2 has an extended width of 61.4mm to 62.6 mm. Optionally, the width of the first display area AA1 is smaller than the width of the second display area AA 2.
Optionally, when the second display area AA2 includes more than three supporting pillars 200a, there are more than two second extending height differences, and the values of the more than two second extending height differences may be the same or different, as long as the height difference between two adjacent supporting pillars 200a in the second display area AA2 is in the range of 0.01 μm to 0.07 μm.
The minimum extension height of the support pillars 200a in the second display area AA2 is 1.5 to 1.6 μm, for example, the minimum extension height of the support pillars 200a in the second display area AA2 is 1.51 to 1.58 μm. The maximum extension height of the supporting pillars 200a in the first display area AA1 is 1.6 μm to 2.1 μm.
In some alternative embodiments, the first extended height differential is greater than the second extended height differential.
First, the first display area AA1 is located on the side of the second display area AA2 close to the edge of the display area, and the cover 300 in the first display area AA1 is prone to tilting. The first extending height difference in the first display area AA1 is greater than the second extending height difference, the first extending height difference is greater, and the height between two adjacent supporting pillars 200a in the first display area AA1 is greater. The heights of most of the supporting pillars 200a in the first display area AA1 are smaller than the heights of the supporting pillars 200a in the second display area AA2, so that the cover plate 300 can be prevented from being tilted up due to the fact that the supporting pillars 200a in the first display area AA1 are too high.
Then, the cover 300 is easily recessed toward the display substrate 110 in the second display area AA2, and the supporting pillars 200a of the second display area AA2 are extended higher than the supporting pillars 200a of the first display area AA1, so that the recessed deformation of the cover 300 in the second display area AA2 can be better improved, the deformation and newton ring of the cover 300 can be improved, and the display effect of the display panel 10 can be improved.
The shape of the second display area AA2 is not limited, and optionally, the side of the third display area AA3 away from the first display area AA1 is the second display area AA 2.
In other embodiments, the display area further includes a fourth display area AA4, and the second display area AA2 surrounds the fourth display area AA 4; a plurality of supporting pillars 200a are disposed in the fourth display area AA4, and the extending height of the supporting pillars 200a in the fourth display area AA4 is less than or equal to the extending height of all the supporting pillars 200a in the second display area AA 2.
In these optional embodiments, the extending height of the supporting pillar 200a in the fourth display area AA4 is less than or equal to the extending height of the supporting pillar 200a in the second display area AA2, so that the cover 300 is prevented from being warped in the fourth display area AA4, and the display effect of the display panel 10 can be improved.
Alternatively, the support posts 200a in the fourth display area AA4 may extend to the same height, so as to ensure that the central area of the cover plate 300 is well supported. Alternatively, the extension height of the support posts 200a in the fourth display area AA4 is equal to the minimum extension height of the support posts 200a in the second display area AA 2. So that the extending height of the supporting column 200a is gently deformed between the second display area AA2 and the fourth display area AA4, and the deformation of the cover plate 300 caused by the sudden rise or fall of the supporting column 200a is avoided.
Embodiments of the second aspect of the present invention further provide a display device, including the display panel 10 of any one of the embodiments of the first aspect. Since the display device of the embodiment of the invention includes the display panel 10, the display device of the embodiment of the invention has the beneficial effects of the display panel 10, and the description thereof is omitted.
The display device in the embodiment of the present invention includes, but is not limited to, a mobile phone, a Personal Digital Assistant (PDA), a tablet computer, an electronic book, a television, a door lock, a smart phone, a console, and other devices having a display function.
While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.
Claims (24)
1. A display panel having a display region including a first display region adjoining an outer edge thereof, a second display region located on a side of the first display region toward a center of the display region, and a third display region located between the first display region and the second display region, the display panel comprising:
the light-emitting substrate comprises a substrate and a pixel defining layer arranged on the substrate, wherein the pixel defining layer comprises an isolation structure and a pixel opening formed by the isolation structure in a surrounding mode;
the supporting structure comprises a plurality of supporting columns which are distributed at intervals in the display area, the supporting columns are distributed at intervals on one side, away from the substrate, of the isolation structure, and the extending height of the supporting columns in the third display area is larger than the extending height of the supporting columns in the first display area and the second display area in the thickness direction of the display panel;
and the cover plate is positioned on one side of the support structure departing from the light-emitting substrate.
2. The display panel according to claim 1, wherein at least some of the plurality of support columns are first support columns, and wherein the first support columns comprise:
the first support column is connected to the isolation structure through the connecting section;
and the reinforcing support section is positioned on one side of the connecting section, which deviates from the isolation structure, and the orthographic projection size of the reinforcing support section on the isolation structure is larger than that of the connecting section on the isolation structure.
3. The display panel according to claim 2, wherein the reinforcing support section has a modulus of elasticity greater than that of the connection section.
4. The display panel of claim 2, wherein the material of the reinforcing support segments comprises a negative poisson's ratio material.
5. The display panel according to claim 2, wherein the reinforcing support section and the connecting section are connected to each other through a transition section, and a cross-sectional area of the transition section is gradually reduced in a direction from the reinforcing support section to the connecting section.
6. The display panel according to claim 2, wherein a surface of the reinforcing support section facing away from the connecting section is provided with a groove, and the groove is formed by being recessed toward the connecting section.
7. The display panel according to claim 6, wherein an orthographic projection of the groove on the barrier structure is in a straight line, a cross or a rice shape.
8. The display panel according to claim 2, wherein at least a part of the first support column is located in the third display region.
9. The display panel according to claim 8, wherein at least a portion of the first support column is located in the second display region.
10. The display panel according to claim 8, wherein at least a part of the first support column is located in the first display region.
11. The display panel according to claim 1, wherein a plurality of the supporting columns are disposed in the first display area, and the extending heights of the supporting columns in the first display area are gradually reduced in a direction from the third display area to the first display area.
12. The display panel according to claim 11, wherein a first extending height difference exists between two adjacent support pillars in the first display region, and the first extending height difference is inversely proportional to the extending width of the first display region.
13. The display panel according to claim 11, wherein the first extending height difference has a value in a range of 0.1 μm to 0.2 μm, and the extending width of the first display region is in a range of 2.2mm to 2.8 mm.
14. The display panel according to claim 11, wherein a plurality of the supporting columns are disposed in the second display area, and the extending heights of the supporting columns in the second display area are gradually reduced in a direction from the third display area to the second display area.
15. The display panel according to claim 14, wherein a second extending height difference exists between two adjacent support pillars in the second display region, and the second extending height difference is inversely proportional to the extending width of the second display region.
16. The display panel according to claim 14, wherein the second extension height difference has a value in a range of 0.01 μm to 0.07 μm.
17. The display panel according to claim 14, wherein a difference between an extended width of the second display region and a total width of the display regions is 6.4mm to 7.6 mm.
18. The display panel of claim 14, wherein the first extended height difference is greater than the second extended height difference.
19. The display panel according to claim 18, wherein a minimum extension height of the support posts in the first display region is smaller than a minimum extension height of the support posts in the second display region.
20. The display panel according to claim 18, wherein the minimum extension height of the support columns in the first display region is 0.1 μm to 0.2 μm.
21. The display panel according to claim 18, wherein the minimum extension height of the support columns in the second display region is 1.5 μm to 1.6 μm.
22. The display panel according to claim 1,
the display area also comprises a fourth display area, and the second display area surrounds the periphery of the fourth display area;
the fourth display area is internally provided with a plurality of support columns, and the extension height of each support column in the fourth display area is equal to the minimum extension height of each support column in the second display area.
23. The display panel according to claim 22, wherein the support pillars in the fourth display region extend to the same height.
24. A display device characterized by comprising the display panel according to any one of claims 1 to 23.
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| CN114220833B (en) * | 2021-12-13 | 2023-07-04 | 武汉华星光电半导体显示技术有限公司 | Display panel |
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| CN105957875A (en) * | 2016-05-31 | 2016-09-21 | 上海天马有机发光显示技术有限公司 | OLED display panel and display device |
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| CN101950795A (en) * | 2009-07-10 | 2011-01-19 | 三星移动显示器株式会社 | Organic light emitting diode display and method for manufacturing the same |
| CN208045551U (en) * | 2018-01-19 | 2018-11-02 | 昆山国显光电有限公司 | Encapsulating structure and Organnic electroluminescent device |
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