Patent Application
20220320465
The present disclosure relates to the field of display technology, in particular to a display substrate, a display panel, a display device, and a method for manufacturing the display substrate.
Organic Light-Emitting Diode (OLED) has an organic compound film capable of emitting light in response to a current, and an organic material is sandwiched between two electrodes, at least one of which is a transparent electrode. The OLED has excellent luminous performance and luminous efficiency, and its driving voltage is relatively low, so it is a good candidate for a display screen.
An object of the present disclosure is to provide a display substrate, a display panel, a display device, and a method for manufacturing the display substrate, so as to improve visual experience of a user.
The technical solutions of the present disclosure will be described as follows.
In one aspect, the present disclosure provides in some embodiments a display substrate, including a display region. The display region includes: a first display region including a plurality of display units arranged on a substrate and a first thin film encapsulation structure arranged at a light-emitting side of the plurality of display units; a second display region including a plurality of display units arranged on the substrate and a second thin film encapsulation structure arranged at a light-emitting side of the plurality of display units; and a transition display region including a plurality of display units arranged on the substrate and a third thin film encapsulation structure arranged at a light-emitting side of the plurality of display units, the transition display region being located between the first display region and the second display region. The first thin film encapsulation structure includes a first inorganic encapsulation layer, a first organic encapsulation layer and a second inorganic encapsulation layer laminated one on another at the light-emitting side of the plurality of display units. The second thin film encapsulation structure includes the first inorganic encapsulation layer, the second inorganic encapsulation layer and a second organic encapsulation layer laminated one on another at the light-emitting side of the plurality of display units. The third thin film encapsulation structure includes a first portion arranged at a side adjacent to the first display region and a second portion arranged at a side adjacent to the second display region, the first portion includes the first inorganic encapsulation layer, the first organic encapsulation layer, the second inorganic encapsulation layer and the second organic encapsulation layer laminated one on another at the light-emitting side of the plurality of display units, and the second portion includes the first inorganic encapsulation layer, the second inorganic encapsulation layer and the second organic encapsulation layer laminated one on another at the light-emitting side of the plurality of display units.
In a possible embodiment of the present disclosure, the second organic encapsulation layer has a light transmittance greater than the first organic encapsulation layer.
In a possible embodiment of the present disclosure, the display region includes a plurality of sides, adjacent sides in the plurality of sides cross to define a plurality of corner portions, and the second display region is located at at least one of the plurality of corner portions.
In a possible embodiment of the present disclosure, a first barrier is arranged between the first display region and the transition display region, and a second barrier is arranged between the second display region and the transition display region.
In a possible embodiment of the present disclosure, a first barrier and a second barrier are arranged at the transition display region, orthogonal projections of the first barrier and the second barrier onto the substrate do not coincide with an orthogonal projection of each display unit at the transition display region onto the substrate, the first barrier is arranged at a side of the transition display region adjacent to the first display region, and the second barrier is arranged at a side of the transition display region adjacent to the second display region.
In a possible embodiment of the present disclosure, the first inorganic encapsulation layer, the first organic encapsulation layer and the second inorganic encapsulation layer of the first portion are formed by extending the first thin film encapsulation structure to a side where the transition display region is located, the first inorganic encapsulation layer, the first organic encapsulation layer and the second inorganic encapsulation layer of the first portion cover the first barrier, the second portion is formed by extending the second thin film encapsulation structure to a side where the transition display region is located and covers the second barrier, and the second organic encapsulation layer of the first portion is formed by extending the second organic encapsulation layer of the second portion to a side where the transition display region is located.
In a possible embodiment of the present disclosure, the first organic encapsulation layer of the first portion is provided with a slope surface at a side adjacent to the second display region, and the second organic encapsulation layer of the first portion covers a side of the slope surface away from the substrate.
In a possible embodiment of the present disclosure, the second organic encapsulation layer of the second thin film encapsulation structure is substantially flush with a surface of the second organic encapsulation layer of the third thin film encapsulation structure away from the substrate.
In a possible embodiment of the present disclosure, the first display region has a first pixel density, the second display region has a second pixel density, the transition display region has a third pixel density, and each of the second pixel density and the third pixel density is smaller than or equal to the first pixel density.
In a possible embodiment of the present disclosure, the second display region includes: a stretchable substrate, a plurality of opening patterns being distributed on a surface of the stretchable substrate, each opening pattern in the plurality of opening patterns including a plurality of first openings, a plurality of bridge regions being formed between at least a part of adjacent first openings in the plurality of first openings in such a manner as to surround an island region, the plurality of second display units being arranged on the island regions formed by the opening patterns; and a plurality of wiring units each coupled between the display units on each island region and arranged at a corresponding bridge region.
In a possible embodiment of the present disclosure, at least one of the plurality of display units includes: a first planarization layer arranged at a front side of the substrate along a light-emitting direction of the display substrate; an organic insulation layer arranged at a side of the first planarization layer away from the substrate; and a first electrode layer arranged at a side of the first planarization layer away from the substrate. The first barrier includes a first groove, the first groove is formed in the first planarization layer and the organic insulation layer covers the first groove in a shape-following manner, or the first groove is formed in the organic insulation layer. The second barrier includes a second groove, the second groove is formed in the first planarization layer and the organic insulation layer covers the second groove in a shape-following manner, or the second groove is formed in the organic insulation layer. The first inorganic encapsulation layer is arranged at a side of the first electrode layer away from the substrate and covers the first electrode layer. The first organic encapsulation layer covers a part of the first inorganic encapsulation layer at a side of the first groove away from the second groove, a part of the first inorganic encapsulation layer at the first groove, and a part of the first inorganic encapsulation layer between the first groove and the second groove and adjacent to the first groove, and does not cover a part of the first inorganic encapsulation layer between the first groove and the second groove and adjacent to the second groove, a part of the first inorganic encapsulation layer at the second groove, and a part of the first inorganic encapsulation layer at a side of the second groove away from the first groove. The second inorganic encapsulation layer covers the first organic encapsulation layer and a part of the first inorganic encapsulation layer not covered by the first organic encapsulation layer. The second organic encapsulation layer covers a part of the second inorganic encapsulation layer at the first groove and a part of the second inorganic encapsulation layer at a side of the first groove away from the first display region, and does not over the first openings.
In a possible embodiment of the present disclosure, the organic insulation layer includes a first post spacer arranged at the first display region, a second post spacer arranged at the transition display region, and a third post spacer arranged at the second display region, the first groove is formed in the first post spacer, and the second groove is formed in the second post spacer.
In a possible embodiment of the present disclosure, each of the first groove and the second groove includes a continuous groove extending in a first direction, and the first direction is an extension direction of a boundary between the first display region and the transition display region.
In a possible embodiment of the present disclosure, the continuous groove has a groove width of about 5 μm to 15 μm in a second direction and a groove height of about 1.5 μm to 2.5 μm in a third direction, the second direction is perpendicular to the first direction and parallel to the stretchable substrate, and the third direction is perpendicular to the stretchable substrate.
In a possible embodiment of the present disclosure, the first groove and/or the second groove include a least one column of discrete grooves arranged sequentially in a second direction, the second direction is perpendicular to the first direction and parallel to the stretchable substrate, and each column of discrete grooves includes a plurality of discrete grooves spaced apart from each other in the first direction.
In a possible embodiment of the present disclosure, the at least one column of discrete grooves includes a plurality of columns of discrete grooves, and adjacent columns of discrete grooves are spaced apart from each other by about 2 μm to 15 μm.
In a possible embodiment of the present disclosure, at least one of the plurality of display units further includes a first isolation structure arranged between the second groove and the first opening and configured to interrupt the first electrode layer at both sides of the first isolation structure. The first electrode layer covers the first isolation structure, and is arranged at a side of the first isolation structure adjacent to the second groove and a side of the first isolation structure adjacent to the first opening.
In a possible embodiment of the present disclosure, at least one of the plurality of display units at the second display region further includes a first passivation layer, a part of the first passivation layer is arranged between the organic insulation layer at the second display region and the first opening, and at least a part of the first passivation layer is arranged at a side of the first planarization layer away from the stretchable substrate. The first isolation structure includes at least one third groove arranged between the first passivation layer and the first planarization layer, and the first electrode layer covering a bottom of the at least one third groove is separated from the first electrode layer covering the first passivation layer.
In a possible embodiment of the present disclosure, at least one of the plurality of display units at the second display region further includes a second passivation layer, and at least a part of the second passivation layer is arranged at a side of the first planarization layer adjacent to the stretchable substrate. The first passivation layer includes a first portion arranged at a side of the first planarization layer away from the stretchable substrate and a second portion at a side of the first planarization layer adjacent to the first opening, the second portion covers a surface of the first planarization layer adjacent to the first opening, and the second portion is coupled to a surface of the second passivation layer so that the first passivation layer protects a surface of the first planarization layer adjacent to the first opening in an isolated manner.
In a possible embodiment of the present disclosure, at least one of the plurality of display units at the second display region further includes an interlayer insulation layer arranged at the front side of the stretchable substrate along the light-emitting direction of the display substrate. The first isolation structure includes at least one first protrusion arranged at a surface of the interlayer insulation layer away from the stretchable substrate, the first electrode layer covers a top of the at least one first protrusion and a part of the surface of the interlayer insulation layer, and the first electrode layer at the top of the at least one first protrusion is separated from the first electrode layer at the surface of the interlayer insulation layer.
In a possible embodiment of the present disclosure, at least one of the plurality of wiring units includes: a second planarization layer arranged at the front side of the stretchable substrate along the light-emitting direction of the display substrate; a pixel definition layer arranged at a side of the second planarization layer away from the stretchable substrate, covering a part of a surface of the second planarization layer, and having at least one fourth groove; and a third electrode layer covering a bottom of the at least one fourth groove and a surface of the pixel definition layer. The third electrode layer covering the bottom of the at least one fourth groove is separated from the third electrode layer covering the surface of the pixel definition layer.
In a possible embodiment of the present disclosure, the quantity of third grooves in the at least one third groove is the same as the quantity of fourth grooves in the at least one fourth groove, and the at least one fourth groove is connected to the at least one third groove to form a closed loop surrounding the first opening.
In a possible embodiment of the present disclosure, at least one of the plurality of wiring units includes: a gate insulation layer arranged at the front side of the stretchable substrate along the light-emitting direction of the display substrate; at least one second protrusion arranged at a surface of the gate insulation layer away from the stretchable substrate; and a third electrode layer covering a top of the at least one second protrusion and a surface of the gate insulation layer not covered by the at least one second protrusion. The third electrode layer covering the top of the at least one second protrusion is separated from the third electrode layer covering the surface of the agate insulation layer.
In a possible embodiment of the present disclosure, the quantity of second protrusions in the at least one second protrusion is the same as the quantity of first protrusions in the at least one first protrusion, and the at least one second protrusion is connected to the at least one first protrusion to form a closed loop surrounding the first opening.
In a possible embodiment of the present disclosure, the first opening includes an open end arranged at a side away from the substrate, a bottom end arranged at a side adjacent to the substrate, and an opening body portion arranged between the open end and the bottom end. An opening width of at least one of the plurality of first openings is arranged in such a manner that an opening width of the opening body portion gradually increases along the light-emitting direction of the display substrate, an opening width of the open end is smaller than a maximum opening width of the opening body portion, and the maximum opening width of the opening body portion is greater than an opening width of the bottom end.
In a possible embodiment of the present disclosure, at least a part of a side wall of the opening body portion adjacent to the open end is of an arc-like shape.
In another aspect, the present disclosure provides in some embodiments a display panel, including the above-mentioned display substrate, and a cover plate arranged at a light-exiting side of the display substrate and encapsulated together with the display substrate.
In yet another aspect, the present disclosure provides in some embodiments a display device, including the above-mentioned display panel.
In still yet another aspect, the present disclosure provides in some embodiments a method for manufacturing a display substrate, including: providing a substrate; and forming a display region on the substrate. The display region includes: a first display region including a plurality of display units arranged on a substrate and a first thin film encapsulation structure arranged at a light-emitting side of the plurality of display units; a second display region including a plurality of display units arranged on the substrate and a second thin film encapsulation structure arranged at a light-emitting side of the plurality of display units; and a transition display region including a plurality of display units arranged on the substrate and a third thin film encapsulation structure arranged at a light-emitting side of the plurality of display units, the transition display region being located between the first display region and the second display region. The first thin film encapsulation structure includes a first inorganic encapsulation layer, a first organic encapsulation layer and a second inorganic encapsulation layer laminated one on another at the light-emitting side of the plurality of display units. The second thin film encapsulation structure includes the first inorganic encapsulation layer, the second inorganic encapsulation layer and a second organic encapsulation layer laminated one on another at the light-emitting side of the plurality of display units. The third thin film encapsulation structure includes a first portion arranged at a side adjacent to the first display region and a second portion arranged at a side adjacent to the second display region, the first portion includes the first inorganic encapsulation layer, the first organic encapsulation layer, and the second inorganic encapsulation layer laminated one on another at the light-emitting side of the plurality of display units, and the second portion includes the first inorganic encapsulation layer, the second inorganic encapsulation layer and the second organic encapsulation layer laminated one on another at the light-emitting side of the plurality of display units.
In a possible embodiment of the present disclosure, the forming the display region on the substrate includes: forming a first barrier and a second barrier at the display region; forming the first inorganic encapsulation layer at the display region; printing a first organic material on the first inorganic encapsulation layer to form a first organic material layer, a part of the first organic material layer being located at the first display region, and the other part of the first organic material extending to cover the first barrier and/or the second barrier; thinning the first organic material layer to remove a part of the first organic material layer and form the first organic encapsulation layer, so as to expose at least a part of the first inorganic encapsulation layer at the transition display region; forming the second inorganic encapsulation layer, a part of the second inorganic encapsulation layer covering the first organic encapsulation layer, the other part of the second inorganic encapsulation layer covering a part of the first inorganic encapsulation layer not covered by the first organic encapsulation layer; and coating the second organic encapsulation layer on the second inorganic encapsulation layer, a part of the second organic encapsulation layer covering a part of the second inorganic encapsulation layer covering the first organic encapsulation layer, and the other part covering a part of the first inorganic encapsulation layer not covered by the first organic encapsulation layer.
The present disclosure has the following beneficial effect.
According to the display substrate, the display panel, the display device and the method for manufacturing the display substrate in the embodiments of the present disclosure, the thin film encapsulation layers at different regions of the display region have different structures, so it is able to ensure the luminous efficiency at different regions of the display region as well as a service life, and improve a visual experience of a user.
The drawings constituting a part of the specification are used to describe the embodiments of the present disclosure, and these drawings and the specification are used together for explaining the principle of the present disclosure.
The present disclosure will become more apparent with reference to the drawings in conjunction with the following description. In these drawings,
It should be appreciated that, each component in the drawings is not drawn in accordance with an actual scale. In addition, any identical or similar reference numeral represents an identical or similar element or element.
The present disclosure will be described hereinafter in details with reference to the embodiments in conjunction with the drawings. The following embodiments are for illustrative purposes only, but shall not be construed as limiting the application or use of the present disclosure. The present disclosure may be implemented in various forms, but not limited to the embodiments provided herein. These embodiments are provided so as to facilitate the understanding of the present disclosure in a thorough and complete manner, and present the scope of the present disclosure to a person skilled in the art. It should be appreciated that, unless otherwise defined, the arrangement of components and steps, material constituents, numeric expressions and numeric values in these embodiments are for illustrative purposes only, but shall not be construed as liming the scope of the present disclosure.
Such words as “first” and “second” are merely used to differentiate different components rather than to represent any order, number or importance. Such words as “include” or “including” intends to indicate that an element before the word contains an element after the word, without excluding any other element. Such words as “on”, “under”, “left” and “right” are merely used to represent relative position relationship, and when an absolute position of the object is changed, the relative position relationship will be changed too.
In the present disclosure, when it is described that a specific element is arranged between a first element and a second element, there is, or there is not, an intermediate element between the specific element and the first or second element. When it is described that a specific element is coupled to the other element, it is directly coupled to the other element without any intermediate element, or it is indirectly coupled to the other element via an intermediate element.
Unless otherwise defined, any technical or scientific term used herein shall have the common meaning understood by a person skilled in the art. It should be further appreciated that, any term defined in a commonly-used dictionary shall be understood as having the meaning in conformity with that in the related art, and shall not be interpreted idealistically or extremely, unless clearly defined.
In the present disclosure, the word “about” refers to that a numerical range and/or numerical value is substantially identical to the list numerical range and/or numerical value in the case of an allowed process error and an allowed measurement error.
Any techniques, methods and devices known to a person skilled in the art will not be particularly discussed, and in an appropriate case, these techniques, methods and devices shall be considered as a part of the specification.
In the related art, a protection cover plate made of a high-molecular material is used to prevent an OLED flexible display device from being easily broken. It is found through research that, there is such a phenomenon as black edge at each of four corners of some OLED flexible display devices, and thereby a visual experience of a user is adversely affected. A display region is provided at each corner of a display panel to prevent the occurrence of the black edge, thereby to improve the visual experience of the user. However, there is a light-emission difference between a normal display region and the display region at each corner, so mixed colors visible to human eyes easily occur.
An object of the present disclosure is to provide a display substrate, a display panel, a display device, and a method for manufacturing the display substrate, so as to improve the visual experience of the user.
As shown in
Referring to
Referring to
Referring to
In
In order to enable the display units at each display region to emit light normally and prevent the occurrence of a material failure and electrode corrosion, each display region is encapsulated and protected through thin film encapsulation layers. The first display region A13 includes a plurality of display units arranged on a substrate and a first thin film encapsulation structure arranged at a light-emitting side of the plurality of display units. The second display region A13 includes a plurality of display units arranged on the substrate and a second thin film encapsulation structure arranged at a light-emitting side of the plurality of display units. The transition display region A15 includes a plurality of display units arranged on the substrate and a third thin film encapsulation structure arranged at a light-emitting side of the plurality of display units.
In the related art, usually the thin film encapsulation layers on the display substrate is a lamination structure including a first organic encapsulation layer, an organic encapsulation layer and a second inorganic encapsulation layer laminated one on another at the light-emitting side of the display units. The first inorganic encapsulation and the second inorganic encapsulation layer are each formed through Plasma Enhanced Chemical Vapor Deposition (PECVD), and the organic encapsulation layer is formed through printing. In order to prevent a risk of water and oxygen erosion to the display units at the second display region A14 when the organic material (e.g., organic ink) for printing the organic encapsulation layer overflows to the first opening, a barrier is arranged between the display unit at the second display region A14 and the first opening, so as to control the organic material at a peripheral position. However, when the thin film encapsulation structures at the second display region A14 and the transition display region A15 are the same as the thin film encapsulation structure at the first display region A13 and the pixel density at each of the second display region A14 and the transition display region A15 is smaller than the first display region A13, a luminous abnormality occurs at the transition display region A15 and the second display region A14, and thereby mixed colors visible to human eyes are produced.
In order to solve the above problems, referring to
Based on the above, the thin film encapsulation layers at the first display region A13, the second display region A14 and the transition display region A15 have different structures. The first organic encapsulation layer 251 and the second inorganic encapsulation layer 253 are formed through PECVD, the first organic encapsulation layer 252 is formed through printing, and the second organic encapsulation layer 254 is formed through coating an OCA. The light transmittance of the second organic encapsulation layer 254 is greater than that of the first organic encapsulation layer 252, so a light transmittance of the first thin film encapsulation structure is smaller than those of the second thin film encapsulation structure and the third thin film encapsulation structure. As a result, it is able to prevent the occurrence of such a phenomenon as luminous abnormality at the transition display region A15 and the second display region A14, thereby to improve the visual experience.
In addition, the first organic encapsulation layer 252 is formed through printing, and the organic material (e.g., organic ink) for forming the first organic encapsulation layer 252 is fluidic, so after the printing, there is a long slope, and the ink is uncontrollable between the first display region A13 and the transition display region A15 (as shown in
Referring to
The first inorganic encapsulation layer 251, the first organic encapsulation layer 252 and the second inorganic encapsulation layer 253 of the first portion 250A are formed by extending the first thin film encapsulation structure to a side where the transition display region A15 is located, the first inorganic encapsulation layer 251, the first organic encapsulation layer 252 and the second inorganic encapsulation layer 253 of the first portion 250A cover the first barrier 271 but do not cover the second barrier 272. In other words, each film layer of the first thin film encapsulation structure at the first display region A13 is made of a same material as the corresponding film layer of the first portion 250A. The first thin film encapsulation structure extends to the transition display region A15 by a certain distance and reaches a position where the first barrier 271 is to be covered but the second barrier 272 is not to be covered, so as to form the first inorganic encapsulation layer 251, the first organic encapsulation layer 252 and the second inorganic encapsulation layer 253 of the first portion 250A.
The second portion 205B is formed by extending the second thin film encapsulation structure to a side where the transition display region A15 is located, and the second portion 205B covers the second barrier 272 but does not cover the first barrier 271.
The second organic encapsulation layer 254 of the first portion 250A is formed by extending the second organic encapsulation layer 254 of the second portion 250B to a side where the transition display region A15 is located. In other words, each film layer of the second thin film encapsulation structure at the second display region A14 is made of a same material as the corresponding film layer of the second portion 250B. The film layers of the second thin film encapsulation structure at the second display region A14 extend to the transition display region A15 by a certain distance to cover the second barrier 272, and the second organic encapsulation layer 254 of the second portion 250B extends to a position where the second inorganic encapsulation layer 253 of the first portion 250A is to be covered.
It should be appreciated that, in the embodiments of the present disclosure, the first barrier 271 is arranged between the first display region A13 and the transition display region A15, and the second barrier 272 is arranged between the second display region A14 and the transition display region A15. In some other embodiments of the present disclosure, the first barrier 271 and the second barrier 272 are arranged at the transition display region A15, orthogonal projections of the first barrier 271 and the second barrier 272 onto the substrate do not coincide with an orthogonal projection of each display unit at the transition display region A15 onto the substrate, the first barrier 271 is arranged at a side of the transition display region A15 adjacent to the first display region A13, and the second barrier 272 is arranged at a side of the transition display region A15 adjacent to the second display region A14.
In addition, referring to
Referring to
Referring to
When stripping the display substrate A off (e.g., through laser lift-off), it is found through research that there are such risks that a film layer between the film layer at the first opening 11 and the film layer at the island region is peeled off and a local film layer is cracked irregularly. In order to reduce this process risk, in
It should be appreciated that, the first opening 11 is formed through a dry-etching process. Due to the limitation of process conditions, in some embodiments of the present disclosure, the first opening 11 includes an open end 111 arranged at a side away from the substrate 1, a bottom end 112 arranged at a side adjacent to the substrate 1, and an opening body portion 113 arranged between the open end 111 and the bottom end 112. An opening width of at least one of the plurality of first openings 11 is arranged in such a manner that an opening width of the opening body portion 113 gradually increases along the light-emitting direction of the display substrate A, an opening width d1 of the open end 111 is smaller than a maximum opening width d2 of the opening body portion, and the maximum opening width d2 of the opening body portion 113 is greater than an opening width d3 of the bottom end 112, i.e., the first opening has narrower ends and a wider middle portion. At least a part of a side wall of the opening body portion 113 adjacent to the open end 111 is of an arc-like shape.
After verification, based on the above shape of the opening, a wall of the first opening 11 adjacent to the island region 13 and a wall of the first opening 11 adjacent to the bridge region 12 each form a relatively flat surface when peeling the display substrate off through laser lift-off, so it is able to improve the manufacture process. After the peeling, a film layer 15 at the bottom of the first opening 11 is reserved on the glass substrate 4. Here, the flat surface refers to that a surface of the walls of the first opening 11 separated from the film layer 15 is a flat surface, rather than an uneven surface caused when the film layer is peeled off locally or the film layer is cracked irregularly. It should be appreciated that, the opening width of the opening body portion 113 is within a range of 5 μm to 25 μm, the opening width of the open end 111 is within a range of 3 μm to 20 μm, and a depth of the opening body portion 113 is within a range of 5 μm to 25 μm.
In addition, it should be further appreciated that, a difference between the maximum opening width d2 of the opening body potion 113 and the opening width d1 of the open end 111 is within a range of 0.4 μm to 4 μm. In other words, the opening width of the opening body portion 113 is wider than that of the open end 111 by 0.2 μm to 2 μm at each of two opposite sides of the first opening 11.
Here, it should be appreciated that, when the thin film encapsulation structure at each of the first display region A13, the second display region A14 and the transition display region A15 is a conventional lamination structure including the first inorganic encapsulation layer 251, the organic encapsulation layer and the second organic encapsulation layer 253, there is a risk that the organic encapsulation layer overflows to the first opening 11. When the first opening 11 is formed in such a manner as to penetrate through all film layers (as shown in
However, based on the display substrate in the embodiments of the present disclosure, in the second thin film encapsulation structure at the second display region A14, the second organic encapsulation layer 254 is located at an uppermost layer of the encapsulation structure, and it is made of such a material as photoresist. Before peeling off the display substrate, the second organic encapsulation layer 254 is patterned, so as to remove a part of the second organic encapsulation layer 254 at a position corresponding to the first opening. In this way, it is able to reduce the risk that the film layer is peeled off and cracked when peeling off the display substrate.
In addition, referring to
In some embodiments of the present disclosure, a plurality of display units is provided at each of the first display region A13, the second display region A14 and the transition display region A15, and the display units at these display regions have a same structure or different structures.
As shown in
In
The first planarization layer 241 is arranged at the front side of the substrate 1 along the light-emitting direction of the display substrate, i.e., at a side of the substrate 1 adjacent to the cover plate B. To be specific, the first planarization layer 241 is arranged at a side of the thin film transistor 22 away from the substrate 1, and covers the thin film transistor 22. The first planarization layer 241 is configured to provide a flat surface to the film layers formed thereabove.
In some embodiments of the present disclosure, the organic insulation layer 236 is arranged at a side of the first planarization layer 241 away from the stretchable substrate 1, and the first barrier 271 includes a first groove. The first groove is formed in the first planarization layer 241, and the organic insulation layer covers the first groove in a shape-following manner, so as to form the first barrier 271. The second barrier 272 includes a second groove. The second groove is formed in the first planarization layer 241, and the organic insulation layer covers the second groove in a shape-following manner, so as to form the second barrier 272.
In some other embodiments of the present disclosure, the first groove and the second groove are formed in the organic insulation layer, so as to form the first barrier 271 and the second barrier 272.
To be specific, referring to
The second electrode layer 243 is arranged at a side of the first planarization layer 241 away from the stretchable substrate 1, and electrically coupled to the thin film transistor 22 through a via-hole.
The first organic light-emitting layer 245 is arranged at a side of the second electrode layer 243 away from the substrate 1. The first electrode layer 244 is arranged at a side of the first organic light-emitting layer 245 away from the substrate 1 and covers the first organic light-emitting layer 245.
In some embodiments of the present disclosure, the second electrode layer 243 is an anode layer, and the first electrode layer 244 is a cathode layer. The second electrode 243, the first organic light-emitting layer 245 and the first electrode layer 244 together form a light-emitting element driven by the thin film transistor 22. The first organic light-emitting layer 245 is made of different materials so as to form subpixels in different colors.
Referring to
The first groove is arranged at a side of a first organic insulation layer 236 away from the substrate 1, and the second groove is arranged at a side of a second organic insulation layer 236 away from the substrate 1, so as to block the overflow of the organic material for forming the first organic encapsulation layer 252. In this way, the first organic encapsulation layer 252 covers a part of the first inorganic encapsulation layer 251 at a side of the first groove away from the second groove, and a part of the first inorganic encapsulation layer 251 between the first groove and the second groove and adjacent to the first groove, and does not cover a part of the first inorganic encapsulation layer 251 between the first groove and the second groove and adjacent to the second groove, a part of the first inorganic encapsulation layer 251 at the second groove, and a part of the first inorganic encapsulation layer 251 at a side of the second groove away from the first groove.
Positions of the first groove and the second groove are determined in accordance with a pitch between the subpixels, and an arrangement mode of the subpixels, at the island regions at the transition display region A15 and the second display region A14.
In
Referring to
Referring to
Referring to
In
A distance d between two adjacent columns of discrete grooves 27b in the plurality of columns of discrete grooves 27b is about 2 μm to 15 μm. Here, the distance d refers to a distance between the adjacent columns of discrete grooves 27b in the second direction.
It should be appreciated that, in some embodiments of the present disclosure, the first groove has a same shape and a same size as the second groove. In some other embodiments of the present disclosure, the first groove has a shape and a size different from the second groove.
In a process for manufacturing the display panel, some film layers (e.g., the organic light-emitting layer or the electrode layer) are formed through coating at the second display region A14 through the whole surface. Correspondingly, in order to prevent a risk of failure when the film layer corresponding to the first opening is connected to the film layer corresponding to the island region, in some embodiments of the present disclosure, a first isolation structure is arranged between the first groove and the first opening 11 to separate the film layers from each other.
Referring to
Referring to
It is found through research that, when the first inorganic encapsulation layer 251 and the second inorganic encapsulation layer 253 are formed through a plasma film-forming process, a lateral film layer formed at a position of the first planarization layer 241 adjacent to the first opening 11 (i.e., a part of the first inorganic encapsulation layer 251 and the second inorganic encapsulation layer 253 on a side wall of the first opening 11) is relatively thin due to a large segment difference. At this time, moisture from the first opening 11 probably enters such elements as the thin film transistor via the thin lateral film layer and the first planarization layer, leading to a failure of the element.
In
The first buffer layer 21 is arranged at a side of the stretchable substrate 1 adjacent to the first planarization layer 241. The first gate insulation layer 231 is arranged at a side of the first buffer layer 21 away from the stretchable substrate 1, and covers the active layer 221 of the thin film transistor 22. The second gate insulation layer 232 is arranged at a side of the first gate insulation layer 231 away from the stretchable substrate 1, and covers the gate electrode 222 of the thin film transistor 22.
The interlayer insulation layer 233 is arranged at a side of the second gate insulation layer 232 away from the stretchable substrate 1. The second passivation layer 234 is arranged between the interlayer insulation layer 233 and the first planarization layer 241. The first passivation layer 235 is arranged at a side of the first planarization layer 241 away from the stretchable substrate 1, and between the organic insulation layer 236 and the first opening 11.
The gate electrode 222 of the thin film transistor 22 is arranged at a surface of the first gate insulation layer 231 away from the stretchable substrate 1. The first source electrode 223 and the first drain electrode 224 of the thin film transistor 22 are arranged at a surface of the interlayer insulation layer 233 away from the stretchable substrate 1, and electrically coupled to the active layer 221 through via-holes penetrating through the first gate insulation layer 231, the second gate insulation layer 232 and the interlayer insulation layer 233. The second source electrode 225 and the second drain electrode 226 of the thin film transistor 22 are arranged at a surface of the second passivation layer 234 away from the stretchable substrate 1, and electrically coupled to the active layer 221 through via-holes penetrating through the second passivation layer 234. In some other embodiments of the present disclosure, the display unit 2 merely includes the first gate insulation layer 231 rather than the second gate insulation layer 232. In some other embodiments of the present disclosure, the thin film transistor 22 includes a source electrode and a drain electrode at a same layer.
In
Referring to
In
In
The third electrode layer 333 covering the bottom of the at least one fourth groove 361 is separated from the third electrode layer 333 covering the surface of the pixel definition layer 332, so as to separate the third electrode layer 333 at the bridge region from the third electrode layer 333 corresponding to the first opening 11, thereby to prevent the film layer corresponding to the first opening from being connected to the film layer corresponding to the island region via the film layer corresponding to the bridge region.
As shown in
For example, the second buffer layer 31 is arranged at a same layer, and made of a same material, as the first buffer layer 21. The first conductive wiring 371 is arranged at a same layer, and made of a same material, as parts of the source electrodes and drain electrodes (e.g., the first source electrode 223 and the first drain electrode 224) of the thin film transistor 22. The second conductive wiring 372 is arranged at a same layer, and made of a same material, as parts of the source electrodes and drain electrodes (e.g., the second source electrode 225 and the second drain electrode 226) of the thin film transistor 22. The second planarization layer 331 is arranged at a same layer, and made of a same material, as the first planarization layer 241. The third electrode layer 333 is arranged at a same layer, and made of a same material, as the first electrode layer 244.
Referring to
As compared with that in
Correspondingly, referring to
In
The second planarization layer 331 is arranged at a side of the second conductive wiring 372 away from the stretchable substrate 1, and covers the second conductive wiring 372. The pixel definition layer 332 is arranged at a side of the second planarization layer 331 away from the stretchable substrate 1, and covers a part of the surface of the second planarization layer 331.
The at least one second protrusion 362 is arranged adjacent to the first opening 11. The third electrode layer 333 covers a top of the at least one second protrusion 362 and a part of the third gate insulation layer 32 not covered by the second protrusion 362. The third electrode layer 333 covering the top of the at least one second protrusion 362 is separated from the third electrode layer 333 covering the third gate insulation layer 32, so as to enable the third electrode layer 333 at the bridge region to be separated from the third electrode layer 333 corresponding to the first opening 11, thereby to prevent the film layer corresponding to the first opening to be connected to the film layer corresponding to the island region via the film layer corresponding to the bridge region.
In some embodiments of the present disclosure, corresponding film layers at the island region and the bridge region are arranged at a same layer and made of a same material. For example, the second buffer layer 31 is arranged at a same layer, and made of a same material, as the first buffer layer 21. The first conductive wiring 371 is arranged at a same layer, and made of a same material, as parts of the source electrodes and drain electrodes (e.g., the first source electrode 223 and the first drain electrode 224) of the thin film transistor 22. The second conductive wiring 372 is arranged at a same layer, and made of a same material, as parts of the source electrodes and drain electrodes (e.g., the second source electrode 225 and the second drain electrode 226) of the thin film transistor 22. The second planarization layer 331 is arranged at a same layer, and made of a same material, as the first planarization layer 241. The third electrode layer 333 is arranged at a same layer, and made of a same material, as the first electrode layer 244.
Referring to
Referring to
In the case that a requirement on product reliability has been met, any other film layer is not arranged between the second organic encapsulation layer 254 and the cover plate B, so that the display substrate is capable of being flexibly attached to the cover plate at a position corresponding to the bridge region.
The second organic encapsulation layer 254 is formed as follows. At first, an organic material is coated onto the second inorganic encapsulation layer 253, and then a patterning process such as exposing and developing is performed to remove the organic material at a position corresponding to the first opening, so as to acquire the second organic encapsulation layer 254. The organic material for forming the second organic encapsulation layer 254 is 1-methoxy-2-acetoxypropane or acrylic resin.
In some embodiments of the present disclosure, the third electrode layer 333 is arranged at a same layer, and made of a same material, as the first electrode layer 244, so as to simplify the manufacture process.
In addition, an organic encapsulation layer pattern is further arranged at a surface of the second organic encapsulation layer 254 at the bridge region away from the stretchable substrate. The organic encapsulation layer pattern includes at least one second opening, and a length direction of the at least one second opening is parallel to a length direction of the adjacent first opening 11. In some embodiments of the present disclosure, the organic encapsulation layer pattern includes a plurality of second openings parallel to each other. The second openings are formed through an exposing and developing process. Through the second openings in the second organic encapsulation layer 254 at the bridge region, it is able to effectively improve a stretching property of the bridge region.
The display panel in the embodiments of the present disclosure is applicable to various display devices. The present disclosure further provides in some embodiments a display device, including the above-mentioned display panel. The display device is any product or member having a display function, e.g., mobile phone, tablet computer, television, display, laptop computer, digital photo frame or navigator.
As shown in
Step S02 specifically includes the following steps.
Step S021: forming a first barrier 271 and a second barrier 272 at the light-emitting side of the plurality of display units at the display region.
To be specific, a first groove and a second groove are formed in an organic insulation layer or a first planarization layer 241 through an exposing and developing process, to serve as the first barrier 271 and the second barrier 272.
Step S022: forming the first inorganic encapsulation layer 251 at the light-emitting side of the plurality of display units at the display region.
To be specific, the first inorganic encapsulation layer 251 is formed through PECVD.
Step S023: printing a first organic material on the first inorganic encapsulation layer 251 to form a first organic material layer, a part of the first organic material layer being located at the first display region A13, and the other part of the first organic material extending to cover the first barrier 271 and/or the second barrier 272.
To be specific, as shown in
Step S024: thinning the first organic material layer to remove a part of the first organic material layer and form the first organic encapsulation layer 252, so as to expose at least a part of the first inorganic encapsulation layer 251 at the transition display region A15.
To be specific, as shown in
Step S025: forming the second inorganic encapsulation layer 253, a part of the second inorganic encapsulation layer 253 covering the first organic encapsulation layer 252, the other part of the second inorganic encapsulation layer 253 covering a part of the first inorganic encapsulation layer 251 not covered by the first organic encapsulation layer 252.
To be specific, the second inorganic encapsulation layer 253 is formed through PECVD.
Step S026: as shown in
To be specific, the second organic encapsulation layer 254 is formed through coating.
It should be further appreciated that, the above embodiments have been described in a progressive manner, and the same or similar contents in the embodiments have not been repeated, i.e., each embodiment has merely focused on the difference from the others. Especially, the product embodiments are substantially similar to the method embodiments, and thus have been described in a simple manner.
The embodiments of the present disclosure have been described hereinabove in details. In order to prevent a concept of the present disclosure from being shielded, some details known in the art are not described. Based on the above description, a person skilled in the art completely knows how to implement the technical solution disclosed herein.
The above embodiments are for illustrative purposes only, but the present disclosure is not limited thereto. Obviously, a person skilled in the art may make further modifications and improvements without departing from the spirit of the present disclosure, and these modifications and improvements shall also fall within the scope of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| PCT/CN2020/089413 | May 2020 | CN | national |
The present application claims a priority of the PCT application No. PCT/CN2020/089413 filed on May 9, 2020, which is incorporated herein by reference in its entirety.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2021/076057 | 2/8/2021 | WO |
