CN116419592A

CN116419592A - Display substrate and display device

Info

Publication number: CN116419592A
Application number: CN202210002044.2A
Authority: CN
Inventors: 王格; 蒋志亮; 潘向南; 何庆; 袁晓敏; 龙再勇; 燕青青; 陈敏; 王明芳
Original assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Priority date: 2022-01-04
Filing date: 2022-01-04
Publication date: 2023-07-11

Abstract

The present invention relates to a display substrate and a display device. The display substrate is provided with a display area; a display substrate, comprising: the display device comprises a substrate, a light-emitting layer, a packaging layer touch control layer, a blocking part and a first organic layer, wherein the light-emitting layer is positioned on the substrate and is positioned in a display area. The packaging layer is positioned on one side of the light-emitting layer away from the substrate. The touch control layer is positioned on one side of the packaging layer far away from the substrate. The first organic layer is located at one side of the touch control layer away from the substrate, at least covers at least part of the edge of the packaging layer and is located outside the bending area. The blocking part is positioned on at least one side of the display area and is positioned on one side of the edge of the packaging layer away from the display area, which is away from the display area.

Description

Display substrate and display device

Technical Field

The present invention relates to the field of display technologies, and in particular, to a display substrate and a display device.

Background

In the related art, a flexible OLED (Organic Light-Emitting Diode) display substrate has many advantages such as being foldable, bendable, and narrow bezel. The flexible OLED display substrate is composed of a flexible substrate, a driving circuit, a light-emitting layer and a packaging layer. The flexible packaging layer is of a sandwich structure: two inorganic layers and an organic layer located in between. The organic layer is manufactured in a printing mode, the initial stage of the organic layer is in a liquid state, a slope is formed when the organic layer flows to the edge of the display substrate, if the slope enters the display area of the display substrate, the path of light is affected, and the edge of the display area is poor in moire.

Disclosure of Invention

The invention provides a display substrate and a display device, which are used for solving the defects in the related art.

According to a first aspect of an embodiment of the present invention, there is provided a display substrate formed with a display region and a non-display region, the non-display region being adjacent to the display region; the non-display area comprises a bending area;

the display substrate includes:

a substrate;

a light emitting layer on the substrate and in the display region;

the packaging layer is positioned on one side of the light-emitting layer away from the substrate;

the touch control layer is positioned on one side of the packaging layer away from the substrate;

the first organic layer is positioned on one side of the touch control layer away from the substrate, at least covers at least part of the edge of the packaging layer and is positioned outside the bending area;

and the blocking part is positioned on at least one side of the display area and on one side of the edge of the encapsulation layer away from the display area, which is away from the display area.

In one embodiment, the barrier is located at a side of an edge of the first organic layer remote from the display region, remote from the display region.

In one embodiment, the blocking portion is located outside the inflection region and is used to prevent the first organic layer from entering the inflection region.

In one embodiment, the height of the barrier is greater than the height of the first organic layer away from the edge of the display region.

In one embodiment, the encapsulation layer includes:

the organic packaging layer is positioned at one side of the light-emitting layer far away from the substrate, and the organic packaging layer is positioned in the display area; the blocking part is positioned at one side of the edge of the organic packaging layer, which is far away from the display area, and is far away from the display area; the organic encapsulation layer includes a slope portion, and the thickness distribution of the slope portion is not uniform.

In one embodiment, the first organic layer includes an optical compensation portion, a projection of the slope portion on the substrate is located within a projection of the optical compensation portion on the substrate, and the optical compensation portion is configured to reduce or eliminate moire phenomenon on the display screen caused by the slope portion.

In one embodiment, at different positions within the display area, the thickness of the optical compensation portion is substantially the same as the sum of the thicknesses of the slope portions, the refractive index of the slope portions is the same as the refractive index of the optical compensation portion, and a surface of the optical compensation portion remote from the substrate is parallel to a surface of the substrate facing the light emitting layer.

In one embodiment, the material of the organic encapsulation layer is the same as the material of the optical compensation portion.

In one embodiment, the organic encapsulation layer further includes a first flat portion, the first flat portion being located in the display area, and the first flat portion being adjacent to the ramp portion; the thickness distribution of the first flat part is uniform;

the first organic layer further comprises a second flat part, the second flat part is positioned in the display area and adjacent to the optical compensation part, the second flat part is positioned on one side of the first flat part away from the substrate, the surface of the second flat part away from the substrate is parallel to the surface of the substrate facing the light emitting layer, and the material of the second flat part is the same as that of the optical compensation part; the thickness of the first organic layer is substantially the same as the sum of the thicknesses of the organic encapsulation layers at different locations within the display area.

In one embodiment, the first organic layer further includes an edge portion adjacent to the optical compensation portion, the edge portion being located in the non-display region and outside the bending region.

In one embodiment, the touch layer includes a first metal layer, an insulating layer and a second metal layer, the first metal layer is located on a side of the organic packaging layer away from the substrate, the insulating layer is located on a side of the first metal layer away from the substrate, and covers the first metal layer, and the second metal layer is located on a side of the insulating layer away from the substrate.

In one embodiment, the display substrate further includes:

the second organic layer is positioned between the touch control layer and the first organic layer, is positioned in the display area and the non-display area, is positioned outside the bending area, and covers the second metal layer.

In one embodiment, the barrier is located in at least one of the first metal layer, the insulating layer, the second metal layer, and the second organic layer.

In one embodiment, when the blocking portion is located in the first metal layer, the insulating layer, the second metal layer, and other layers of the second organic layer except the second metal layer, the second metal layer includes a hollowed portion, a lap joint portion, and a trace portion, the lap joint portion is located at a side of the hollowed portion away from the display area, the trace portion is located at a side of the lap joint portion away from the display area, a projection of the blocking portion on the substrate is located in a projection of the hollowed portion on the substrate, the lap joint portion is in lap joint with the first metal layer, and the trace portion is connected with the lap joint portion.

In one embodiment, the number of the blocking parts is N, N is a positive integer, and when N is greater than 1, the N blocking parts are sequentially arranged in a direction from the display area to the non-display area.

In one embodiment, when N is greater than 1, there is a gap between adjacent two of the blocking portions.

In one embodiment, when N is greater than 1, the heights of N of the barriers are the same, or

When N is greater than 1, the heights of at least two blocking portions in the N blocking portions are different.

In one embodiment, the distance between the blocking portion and the inflection region is less than the distance between the blocking portion and the display region.

In one embodiment, the display device further comprises a dam located in the non-display region and on a side of the barrier portion near the display region, the dam and the barrier portion not overlapping in a direction perpendicular to the substrate;

the distance between the blocking portion and the dam is smaller than the distance between the blocking portion and the bending region.

According to a second aspect of the embodiments of the present invention, there is provided a display device including the display substrate described above.

According to the display substrate and the display device provided by the embodiment of the invention, as the first organic layer is positioned on one side of the touch control layer far away from the substrate and at least covers at least part of the edge of the packaging layer, the difference between the total thickness of the edge part of the first organic layer and the edge part of the packaging layer and the total thickness of the display area part is smaller, the display effect of the edge part of the display area can be improved, and the display quality of the display substrate is improved; the blocking part is positioned on one side of the edge of the packaging layer away from the display area, which is far away from the display area, and can block the organic layer of the packaging layer and the first organic layer from overflowing the display area, so that the difference between the total thickness of the edge part of the first organic layer and the packaging layer and the total thickness of the display area is reduced, and the display quality is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a top view of a display substrate according to an embodiment of the present invention;

FIG. 2A is a cross-sectional view taken along section line DD of FIG. 1;

FIG. 2B is a top view of another display substrate according to an embodiment of the invention;

FIG. 2C is a partial structural top view of yet another display substrate according to an embodiment of the present invention;

FIG. 2D is a partial structural top view of yet another display substrate according to an embodiment of the present invention;

FIG. 2E is a partial structural top view of yet another display substrate according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of another display substrate according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of another display substrate according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view of another display substrate according to an embodiment of the invention;

fig. 6 is a cross-sectional view of another display substrate according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus and methods consistent with aspects of the invention as detailed in the accompanying claims.

The embodiment of the invention provides a display substrate. As shown in fig. 1 to 2A, the display substrate is formed with a display area AA and a non-display area NA, which is adjacent to the display area AA. The non-display area includes a inflection area BB. The display substrate includes: substrate 21, light emitting layer 23, encapsulation layer 24, touch layer 27, first organic layer 210, and barrier 29. Fig. 2A is a cross-sectional view taken along the line DD in fig. 1.

As shown in fig. 1 to 2A, the light emitting layer 23 is located on the substrate 21 and is located in the display area AA. The encapsulation layer 24 is located on the side of the light emitting layer 23 remote from the substrate 21. The touch layer 27 is located on a side of the encapsulation layer 24 remote from the substrate 21. The first organic layer 210 is located on a side of the encapsulation layer 24 away from the substrate 21, and the first organic layer 210 covers at least a part of the edge of the encapsulation layer 24 and is located outside the bending region BB. The blocking portion 29 is located on at least one side of the display area AA, and is located on a side of the encapsulation layer 24 away from the display area AA at an edge thereof.

In this embodiment, since the first organic layer is located on the side of the touch layer away from the substrate, and the first organic layer at least covers at least part of the edge of the encapsulation layer, the difference between the total thickness of the edge portion of the first organic layer and the edge portion of the encapsulation layer and the total thickness of the edge portion of the display region is smaller, so that the display effect of the edge portion of the display region can be improved, and the display quality of the display substrate can be improved; the blocking part is positioned on one side of the edge of the packaging layer away from the display area, which is far away from the display area, and can block the organic layer of the packaging layer and the first organic layer from overflowing the display area, so that the difference between the total thickness of the edge part of the first organic layer and the packaging layer and the total thickness of the display area is reduced, and the display quality is improved.

The first organic layer comprises an optical compensation part, the projection of the slope part on the substrate is positioned in the projection of the optical compensation part on the substrate, and the optical compensation part is configured to weaken or eliminate the phenomenon of moire on the display picture caused by the slope part, so that when the light-emitting layer emits light, the phenomenon of moire on the display picture can be weakened or eliminated, and the display quality is improved. The display substrate provided by the embodiment of the invention is briefly described above, and the display substrate provided by the embodiment of the invention is described in detail below.

The embodiment of the invention also provides a display substrate. The display substrate, as shown in fig. 1, includes: the display area AA and the non-display area NA. The display area AA is adjacent to the non-display area NA.

In some embodiments, as shown in FIG. 1, the non-display area NA surrounds the display area AA. In other embodiments, the non-display area NA may partially surround the display area AA, for example, the display area AA may be surrounded from two sides or three sides.

In some embodiments, as shown in fig. 1, the non-display area NA includes an upper frame area NA1, a lower frame area NA2, a left frame area NA3, and a right frame area NA4. Wherein, the lower frame area NA2 is positioned at one side of the display substrate where the driving chip 11 is arranged. The left frame area NA3 and the right frame area NA4 are located at two sides of the display substrate, and are opposite to each other in the first direction X, and the upper frame area NA1 and the lower frame area NA2 are also located at two sides of the display substrate, and are opposite to each other in the second direction Y.

In some embodiments, as shown in fig. 1, the lower frame area NA2 includes a fan-out area CC and a bending area BB. The fan-out area CC is located between the display area AA and the inflection area BB. A plurality of signal lines, for example, a data signal line (not shown), a touch signal line 12, and a power signal line (not shown), are disposed in the fan-out area CC, but not limited thereto. The driving chip 11 is located at a side of the bending region BB away from the display region AA, and the bending region BB can bend to place the driving chip 11 at a side of the display substrate facing away from the light emitting layer.

In some embodiments, as shown in fig. 1, the dicing street 13 and the blocking portion 29 are disposed on the display substrate, where the dicing street 13 and the blocking portion 29 are located in the non-display area NA, and the dicing street 13 is used to indicate the dicing path.

In some embodiments, the barrier 29 is located at a side of an edge of the first organic layer 210 remote from the display area AA. In this configuration, the blocking portion 29 may block the organic material of the first organic layer 210 from overflowing in a direction away from the display region.

In one embodiment, the height of the barrier 29 is greater than the height of the first organic layer 210 away from the edge of the display area AA. Thus, the blocking portion 29 is more advantageous to block the organic material of the first organic layer 210 from overflowing in a direction away from the display area.

In some embodiments, the blocking portion 29 is located outside the inflection region BB and is used to block the first organic layer 210 from entering the inflection region BB. In this way, the blocking portion 29 can avoid the first organic layer 210 from entering the bending region BB, so as to prevent the film layer in the bending region BB from thickening, which results in the problem that the film layer in the bending region BB cracks or the circuit in the bending region BB breaks during bending.

In some embodiments, as shown in fig. 1, the blocking portion 29 is only located in the lower frame area NA2, the blocking portion 29 is not provided in the remaining frames, and the structure formed by the organic material at the edge of the scribe line is not provided with a slope portion, or at least most of the slope portion is cut by the process adjustment, and the rest of the structure is substantially not provided with a slope portion.

In other embodiments, the blocking portion 29 is not only provided in the lower frame area NA2, but may be present in at least one of the remaining frames for blocking the first organic layer from overflowing. As shown in fig. 2B, the barrier 29 may have a structure of at least one turn and at least partially surrounding the display area AA, and the barrier 29 includes at least one organic layer. In the embodiment shown in fig. 2B, the display substrate includes a first barrier 291 and a second barrier 292 located at a side of the first barrier 291 away from the display area AA, and the first barrier 291 and the second barrier 292 each surround the display area AA. In other embodiments, the display substrate may include three or more barriers 29 surrounding the display area AA.

In some embodiments, as shown in fig. 2C, at least one barrier 29 of the display substrate is bifurcated at a portion near the lower bezel NA2 to form two sub-barriers 293, and left and right opposite sides of the barrier may be substantially symmetrical. Such at least one barrier 29 forms two sub-barriers 293 between the display area AA and the inflection area BB, which further helps to prevent the first organic layer 210 from entering the inflection area BB. When the display substrate includes two or more barrier portions 29, the barrier portion 29 near the display area AA may diverge to form two sub-barrier portions at a portion near the lower frame NA 2. In the embodiment shown in fig. 2C, the display substrate includes a first blocking portion 291 and a second blocking portion 292 located on a side of the first blocking portion 291 away from the display area AA, and the first blocking portion 291 is bifurcated to form two sub-blocking portions 293 at a portion near the lower frame NA 2.

In some embodiments, the blocking portion 29 is discontinuous in the border region, that is, the blocking portion 29 is provided with a notch at some positions in the border region. As shown in fig. 2D, the blocking portion 29 includes a first blocking section 294 and a second blocking section 295, where the first blocking section 294 and the second blocking section 295 are spaced apart, and a gap is formed between the first blocking section 294 and the second blocking section 295. The display substrate further includes a buffer portion 296 located at a side of the first barrier section 294 remote from the display area AA, and a gap between the first barrier section 294 and the second barrier section 295 is opposite to the buffer portion 296. The organic material flows out through the gap between the first barrier section 294 and the second barrier section 295 at a relatively high speed, and the organic material flows out from the gap and bypasses the buffer portion 296, and flows out from both sides of the buffer portion 296, so that the buffer portion 296 can slow down the outward overflow of the organic material. Fig. 2D only illustrates a part of the structure of the blocking portion 29, where the blocking portion 29 may form a plurality of gaps, and a buffer portion may be disposed on a side of each gap away from the display area AA.

Further, as shown in fig. 2D, both end portions of the buffer portion 296 are bent toward the display area AA to further slow down the organic material overflowing. The length of the buffer 296 may be greater than the size of the gap between the first and

second barrier sections

294, 295 to more effectively slow the organic material from overflowing. The buffer 296 may be wavy, linear, folded, curved, etc.

In one embodiment, the encapsulation layer 24 includes an organic encapsulation layer 242, the organic encapsulation layer 242 being located on a side of the light emitting layer 23 remote from the substrate 21, the organic encapsulation layer 242 being located in the display area AA. The blocking part 29 is positioned at one side of the edge of the organic encapsulation layer 242 away from the display area AA, which is away from the display area AA; the organic encapsulation layer 242 includes a slope portion P2, and the thickness distribution of the slope portion P2 is not uniform.

Further, the first organic layer 210 includes an optical compensation portion P7, where the orthographic projection of the slope portion P2 on the substrate 21 is located within the orthographic projection of the optical compensation portion P7 on the substrate 21, and the optical compensation portion P7 is configured to reduce or eliminate the moire phenomenon on the display screen caused by the slope portion. Therefore, when the light emitting layer 23 emits light, the optical compensation portion P7 can reduce or eliminate the moire phenomenon on the display screen, and improve the display quality.

In some embodiments, as shown in fig. 2A, the display substrate includes: the substrate 21, the driving circuit layer 22, the light emitting layer 23, the encapsulation layer 24, the planarization layer 25, the bank 26, the touch layer 27, the second organic layer 28, the barrier 29, and the first organic layer 210. Fig. 2A is a cross-sectional view taken along the line DD in fig. 1.

In some embodiments, the substrate 21 is a flexible substrate. The material of the substrate 21 includes an acid and alkali resistant polymer material, and for example, the material of the substrate 21 includes at least one of polyimide, polyethylene, polypropylene, polystyrene, and polyethylene terephthalate.

In some embodiments, as shown in fig. 2A, the driving circuit layer 22 is disposed on the substrate 21, and the pixel circuits of the sub-pixels are disposed in the driving circuit layer 22, and the pixel circuits are used to drive the sub-pixels to emit light. The pixel circuit includes a transistor, and may further include a capacitor, and for example, the pixel circuit may be a 1T pixel circuit, a 2T1C pixel circuit, a 3T1C pixel circuit, a 4T1C pixel circuit, a 5T1C pixel circuit, a 6T1C pixel circuit, or a 7T1C pixel circuit.

In some embodiments, as shown in fig. 2A, the light emitting layer 23 is located on a side of the driving circuit layer 22 away from the substrate 21. The light emitting layer 23 may include a red sub-pixel R, a green sub-pixel G and a blue sub-pixel B, but is not limited thereto. The red subpixel R is used to emit red light, the green subpixel G is used to emit green light, and the blue subpixel B is used to emit blue light.

In some embodiments, the light emitting layer 23 is an organic light emitting layer. The red sub-pixel R, the green sub-pixel G and the blue sub-pixel B are all OLED (organic light emitting diode) sub-pixels.

In some embodiments, as shown in fig. 2A, the encapsulation layer 24 is located on a side of the light emitting layer 23 away from the substrate 21, for preventing water oxygen from attacking the light emitting layer 23. The encapsulation layer 24 includes a first inorganic encapsulation layer 241, an organic encapsulation layer 242 and a second inorganic encapsulation layer 243, the first inorganic encapsulation layer 241 is located on a side of the light emitting layer 23 away from the substrate 21, the organic encapsulation layer 242 is located on a side of the first inorganic encapsulation layer 241 away from the substrate 21, and the second inorganic encapsulation layer 243 is located on a side of the organic encapsulation layer 242 away from the substrate 21. The organic encapsulation layer 242 may be formed using an inkjet printing (IJP) process.

In some embodiments, as shown in fig. 2A, a portion of the first inorganic encapsulation layer 241 and a portion of the second inorganic encapsulation layer 243 are located in the display area AA, and another portion of the first inorganic encapsulation layer 241 and another portion of the second inorganic encapsulation layer 243 are located in the non-display area NA. The organic encapsulation layer 242 is located in the display area AA.

In some embodiments, as shown in fig. 2A, the organic encapsulation layer 242 includes a first flat portion P1 and a slope portion P2, wherein the first flat portion P1 and the slope portion P2 are both located in the display area AA, the first flat portion P1 is adjacent to the slope portion P2, and the slope portion P2 surrounds the first flat portion P1, i.e. the first flat portion P1 is located in the slope portion P2. The thickness distribution of the first flat portion P1 is uniform, and the thickness distribution of the slope portion P2 is non-uniform, for example, the thickness of the slope portion P2 gradually decreases in a direction from the first flat portion P1 toward the slope portion P2. The wedge-like structure of the slope portion P2 may cause an interference phenomenon, and the organic encapsulation layer 242 may cause a moire phenomenon at the edge of the display screen due to the slope portion P2 around.

In some embodiments, as shown in fig. 2A, the planarization layer 25 is located on a side of the driving circuit layer 22 away from the substrate 21, and the planarization layer 25 is located in the non-display area NA and between the driving circuit layer 22 and the touch layer 27 for separating the driving circuit layer 22 from the touch layer 27. The material of the planarization layer 25 is an organic insulating material.

In some embodiments, as shown in fig. 2A, the bank 26 is located at a side of the driving circuit layer 22 away from the substrate 21, the bank 26 is located in the non-display area NA, and the barrier 29 is located at a side close to the display area AA for preventing organic material for preparing the organic encapsulation layer 242 from overflowing into the non-display area NA when preparing the organic encapsulation layer 242.

In some embodiments, as shown in fig. 2A, the dike 26 may be annular in shape. The number of the banks 26 may be two, for example, the display substrate may include a first bank 261 and a second bank 262, and the first bank 261 is positioned inside the second bank 262, so that the organic material may be further prevented from overflowing to the non-display area NA when the organic encapsulation layer 242 is prepared, and the reliability may be improved.

In some embodiments, the dam 26 is located on and on a side of the barrier 29 adjacent to the display area AA, the dam 26 and the barrier 29 not overlapping in a direction perpendicular to the substrate 21; the distance between the blocking portion 29 and the dam 26 is smaller than the distance between the blocking portion 29 and the bending region BB.

In some embodiments, as shown in fig. 2E, the display substrate may include a first dam 261 and a second dam 262, the first dam 261 being located inside the second dam 262; the display substrate includes a first barrier 291 and a second barrier 292, and the first barrier 291 is positioned inside the second barrier 292.

The width of the first barrier 291 may be substantially the same as the width of the second barrier 292. The distance between the first blocking portion 291 and the second dam 262 is smaller than the distance between the second blocking portion 292 and the bent portion BB. The distance between the first bank 261 and the display area AA is smaller than the distance between the second barrier 292 and the folded portion BB. The distance between the second dam 262 and the first barrier 291 is smaller than the distance between the first dam 261 and the display area AA.

In some embodiments, as shown in fig. 2A, the bank 26 may be co-layered with the planarization layer 25, and the material of the bank 26 may be the same as that of the planarization layer 25, but is not limited thereto.

In some embodiments, as shown in fig. 2A, the touch layer 27 is located on a side of the encapsulation layer 24 away from the substrate 21. The touch layer 27 is located in the display area AA and the non-display area NA. The touch layer 27 includes touch electrodes and touch signal lines 12, the touch electrodes are located in the display area AA, and one portion of the touch signal lines 12 is located in the display area AA, and the other portion is located in the non-display area NA.

In some embodiments, the touch layer 27 may be fabricated using flexible multilayer (Flexible Multiple Layer on Cell, FMLOC) technology.

In some embodiments, as shown in fig. 2A, the touch layer 27 includes a first metal layer 271, an insulating layer (not shown) and a second metal layer 272, the first metal layer 271 is located on a side of the encapsulation layer 24 away from the substrate 21, the insulating layer is located on a side of the first metal layer 271 away from the substrate 21, and covers the first metal layer 271, and the second metal layer 272 is located on a side of the insulating layer away from the substrate 21.

In some embodiments, as shown in fig. 2A, in a partial area in the fan-out area CC, one of the first metal layer 271 and the second metal layer 272 may be used for routing, for example, on a side close to the display area AA, routing is performed through the first metal layer 271, then on a side close to the bending area BB, routing is performed through the second metal layer 272, and the second metal layer 272 and the first metal layer 271 may be connected by a lap joint manner.

In some embodiments, as shown in fig. 2A, the second metal layer 272 includes a hollowed portion 2721, a lap joint portion 2722 and a routing portion 2723, the lap joint portion 2722 is located at a side of the hollowed portion 2721 away from the display area AA, the routing portion 2723 is located at a side of the lap joint portion 2722 away from the display area AA, the lap joint portion 2722 is lap-jointed with the first metal layer 271, and the routing portion is connected with the lap joint portion, i.e. the second metal layer 272 is lap-jointed with the first metal layer 271 through the lap joint portion 2722.

In some embodiments, as shown in fig. 2A, the second organic layer 28 is located on a side of the touch layer 27 away from the substrate 21, and the second organic layer 28 is located in the display area AA and the non-display area NA and is located outside the bending area BB. The second organic layer 28 covers the second metal layer 272 for protecting the second metal layer 272, and the second organic layer 28 also plays a role of planarization.

In some embodiments, as shown in fig. 2A, the first organic layer 210 is located on a side of the second organic layer 28 remote from the substrate 21. The first organic layer 210 may be formed using an inkjet printing (IJP) process. The first organic layer 210 includes a second flat portion P3, an optical compensation portion P4, and an edge portion P5. The second flat portion P3 and the optical compensation portion P4 are located in the display area AA, the second flat portion P3 is adjacent to the optical compensation portion P4, the optical compensation portion P4 surrounds the second flat portion P3, the edge portion P5 is located in the non-display area NA, the edge portion P5 is adjacent to the optical compensation portion P4, and the edge portion P5 surrounds the optical compensation portion P4.

In some embodiments, as shown in fig. 2A, the second flat portion P3 is located on a side of the first flat portion P1 away from the substrate 21, a surface of the second flat portion P3 away from the substrate 21 is parallel to a surface of the substrate 21 facing the light emitting layer 23, and a material of the second flat portion P3 is the same as a material of the optical compensation portion P4.

In some embodiments, as shown in fig. 2A, the projection of the slope portion P2 on the substrate 21 is located within the projection of the optical compensation portion P4 on the substrate 21, and the optical compensation portion P4 is configured to reduce or eliminate moire phenomenon on the display screen caused by the slope portion P2.

In some embodiments, as shown in fig. 2A, at different positions within the display area AA, the thickness of the optical compensation portion P4 and the sum of the thicknesses of the slope portions P2 are substantially the same, and the refractive index of the slope portions P2 is the same as the refractive index of the optical compensation portion P4. Thus, when the light emitting layer 23 emits light, the optical path length of the outgoing light from the optical compensation portion P4 is substantially the same at different positions in the display area, so that the moire phenomenon of the display screen can be reduced or eliminated, and the display quality can be improved.

In some embodiments, as shown in fig. 2A, the surface of the optical compensation portion P4 facing away from the substrate 21 is parallel to the surface of the substrate 21 facing the light emitting layer 23. The surface of the optical compensation portion P4 away from the substrate 21 is in the same plane as the surface of the second flat portion P3 away from the substrate 21.

In some embodiments, the thickness of the first organic layer 210 is substantially the same as the sum of the thicknesses of the organic encapsulation layers 242 at different locations within the display area AA. The material of the organic encapsulation layer 242 is the same as that of the optical compensation portion P4. Thus, when the light emitting layer 23 emits light, the optical paths of the outgoing light from the first organic layer 210 are substantially the same at different positions in the display area, so that the moire phenomenon of the display screen can be reduced or eliminated, and the display quality can be improved.

In some embodiments, as shown in fig. 2A, the edge portion P5 is adjacent to the optical compensation portion P4, and the edge portion P5 may surround the optical compensation portion P4. The edge portion P5 is located in the non-display area NA, for example, the edge portion P5 may be located in the upper frame area NA1, the lower frame area NA2, the left frame area NA3, and the right frame area NA4. The thickness of the edge portion P5 may be uneven.

It should be noted that, in some embodiments, the first organic layer 210 may only be provided with the optical compensation portion P4 and the edge portion P5, and the second flat portion P3 is not provided.

In some embodiments, as shown in fig. 2A, when the edge portion P5 is located in the lower frame area NA2, the edge portion P5 is located outside the inflection area BB. In this way, the first organic layer 210 can be prevented from affecting the bending performance of the display substrate in the bending region BB, and adverse phenomena such as bending cracks or dead bending can be avoided.

In some embodiments, as shown in fig. 2A, the blocking portion 29 is located in the non-display area NA and is located outside the bending area BB, the blocking portion 29 is located on a side of the first organic layer 210 away from the display area AA, the height of the blocking portion 29 is greater than the height of the first organic layer 210 away from the edge of the display area AA, and the blocking portion 29 is used to prevent the first organic layer 210 from entering the bending area BB.

In some embodiments, as shown in fig. 2A, when only the lower frame area NA2 is provided with the inflection zone BB and the upper frame area NA1, the left frame area NA3, and the right frame area NA4 are not provided with the inflection zone BB, the blocking portion 29 may be provided only at the lower frame area NA 2.

In some embodiments, as shown in fig. 2A, the barrier 29 is located in the second organic layer 28. In other embodiments, the barrier 29 may also be located in the first metal layer 271, the insulating layer, or the second metal layer 272, or at least two of the first metal layer 271, the insulating layer, the second metal layer 272, and the second organic layer 28.

In some embodiments, as shown in fig. 2A, the projection of the blocking portion 29 on the substrate 21 is located within the projection of the hollowed-out portion 2721 on the substrate 21. The regions on both sides of the barrier 29 are routed using the first metal layer 271, and are not routed using the second metal layer 272, so that the second metal layer 272 is prevented from being exposed.

In some embodiments, as shown in fig. 2A, a distance D2 between the blocking portion 29 and the inflection region BB is smaller than a distance D1 between the blocking portion 29 and the display region AA. I.e. the blocking portion 29 is closer to the inflection zone BB. In this way, the height of the blocking portion 29 can be reduced.

In some embodiments, as shown in fig. 2A, the distance D1 between the barrier 29 and the display area AA is 500 micrometers to 1500 micrometers, for example, the distance D1 between the barrier 29 and the display area AA is 500 micrometers, 900 micrometers, 1000 micrometers, or 1500 micrometers, but is not limited thereto.

In some embodiments, as shown in fig. 2A, the distance D2 between the blocking portion 29 and the bending region BB is 400 micrometers to 1000 micrometers, for example, the distance D2 between the blocking portion 29 and the bending region BB is 400 micrometers, 700 micrometers, 800 micrometers, or 1000 micrometers, but is not limited thereto.

In some embodiments, as shown in fig. 2A, the distance D3 between the barrier 29 and the dike 26 is greater than 50 microns. Wherein, when the number of the dams 26 is greater than 1, the distance D3 between the blocking portion 29 and the dams 26 is the distance D3 between the blocking portion 29 and the outer dams 26.

In some embodiments, as shown in fig. 2A, the number of stops 29 is one. In other embodiments, the number of stops 29 is two or more.

The embodiment of the invention also provides a display substrate. Unlike the above embodiments, as shown in fig. 3, in some embodiments, the barrier 29 is located in the insulating layer 273 in the second organic layer 28 and the touch layer 27.

The embodiment of the invention also provides a display substrate. Unlike the above-described embodiments, as shown in fig. 4, in some embodiments, the number of the blocking portions 29 is two. The two blocking portions 29 are arranged in order in a direction from the display area AA to the inflection area BB. In this way, when the material for preparing the first organic layer 210 overflows from the barrier 29 near the display area AA, the barrier 29 near the inflection region BB can also prevent the material for preparing the first organic layer 210 from entering the inflection region BB, improving the reliability of the barrier.

In some embodiments, as shown in fig. 4, the height of all stops 29 is the same. Thus, the complexity of the preparation process can be reduced, which is beneficial to reducing the cost. In other embodiments, the height of at least two stops 29 of all stops 29 is different.

In some embodiments, as shown in fig. 4, there is a gap between two adjacent stops 29. In this way, when the material for preparing the first organic layer 210 overflows from the barrier 29 near the display area AA, the barrier 29 near the inflection region BB can also prevent the material for preparing the first organic layer 210 from entering the inflection region BB, improving the reliability of the barrier.

In some embodiments, as shown in fig. 4, both barriers 29 may be located in the second organic layer 28.

In some embodiments, as shown in fig. 5, each of the two blocking portions 29 is located in the second organic layer 28 and the insulating layer 273 in the touch layer 27, and the heights of the two blocking portions 29 are the same.

In some embodiments, as shown in fig. 6, the number of blocking portions 29 is two, and the height of the blocking portion 29 near the display area AA is smaller than the height of the blocking portion 29 near the bending area BB. In other embodiments, the height of the blocking portion 29 near the display area AA may be greater than the height of the blocking portion 29 near the bending area BB.

The embodiment of the invention also provides a display device which comprises a display module and the display substrate in any embodiment.

In this embodiment, since the organic packaging layer is located at a side of the light emitting layer away from the substrate, the organic packaging layer is located in the display area, the organic packaging layer includes a slope portion, the thickness distribution of the slope portion is uneven, and the first organic layer is located at a side of the organic packaging layer away from the substrate, the first organic layer includes an optical compensation portion, the projection of the slope portion on the substrate is located in the projection of the optical compensation portion on the substrate, and the optical compensation portion is configured to weaken or eliminate the moire phenomenon on the display screen caused by the slope portion, so that when the light emitting layer emits light, the moire phenomenon on the display screen can be weakened or eliminated, and the display quality is improved.

Note that, the display device in this embodiment may be: electronic paper, mobile phone, tablet computer, television, notebook computer, digital photo frame, navigator and any other products or components with display function.

It is noted that in the drawings, the size of layers and regions may be exaggerated for clarity of illustration. Moreover, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or intervening layers may be present. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or intervening layers or elements may be present. In addition, it will be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or more than one intervening layer or element may also be present. Like reference numerals refer to like elements throughout.

In the present invention, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless explicitly defined otherwise.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It is to be understood that the invention is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims

1. A display substrate, characterized in that a display area and a non-display area are formed, the non-display area being adjacent to the display area; the non-display area comprises a bending area;

the display substrate includes:

a substrate;

a light emitting layer on the substrate and in the display region;

2. The display substrate of claim 1, wherein the barrier is located on a side of an edge of the first organic layer remote from the display region.

3. The display substrate of claim 1, wherein the barrier is located outside the inflection region and is configured to prevent the first organic layer from entering the inflection region.

4. The display substrate according to claim 1, wherein a height of the barrier is greater than a height of the first organic layer away from an edge of the display region.

5. The display substrate of claim 1, wherein the encapsulation layer comprises:

6. The display substrate according to claim 5, wherein,

the first organic layer includes an optical compensation portion, a projection of the slope portion on the substrate is located within a projection of the optical compensation portion on the substrate, and the optical compensation portion is configured to reduce or eliminate moire phenomenon on a display screen caused by the slope portion.

7. The display substrate according to claim 6, wherein a sum of a thickness of the optical compensation portion and a thickness of the slope portion is substantially the same at different positions within the display region, a refractive index of the slope portion is the same as a refractive index of the optical compensation portion, and a surface of the optical compensation portion remote from the substrate is parallel to a surface of the substrate facing the light emitting layer.

8. The display substrate according to claim 6, wherein a material of the organic encapsulation layer is the same as a material of the optical compensation portion.

9. The display substrate of claim 6, wherein the organic encapsulation layer further comprises a first flat portion, the first flat portion is located in the display area, and the first flat portion is adjacent to the ramp portion; the thickness distribution of the first flat part is uniform;

10. The display substrate according to claim 6, wherein the first organic layer further comprises an edge portion adjacent to the optical compensation portion, the edge portion being located in the non-display region and outside the bending region.

11. The display substrate according to any one of claims 1 to 10, wherein the touch layer comprises a first metal layer, an insulating layer and a second metal layer, the first metal layer is located on a side of the organic encapsulation layer away from the substrate, the insulating layer is located on a side of the first metal layer away from the substrate and covers the first metal layer, and the second metal layer is located on a side of the insulating layer away from the substrate.

12. The display substrate of claim 11, wherein the display substrate further comprises:

13. The display substrate of claim 12, wherein the barrier is located in at least one of the first metal layer, the insulating layer, the second metal layer, and the second organic layer.

14. The display substrate according to claim 13, wherein when the blocking portion is located in the first metal layer, the insulating layer, the second metal layer, and other layers of the second organic layer except the second metal layer, the second metal layer includes a hollowed portion, a lap portion, and a trace portion, the lap portion is located on a side of the hollowed portion away from the display area, the trace portion is located on a side of the lap portion away from the display area, a projection of the blocking portion on the substrate is located in a projection of the hollowed portion on the substrate, the lap portion is lap-jointed with the first metal layer, and the trace portion is connected with the lap portion.

15. The display substrate according to any one of claims 1 to 10, wherein the number of the barrier portions is N, N is a positive integer, and when N is greater than 1, the N barrier portions are sequentially arranged in a direction from the display region toward the non-display region.

16. The display substrate according to claim 15, wherein when N is greater than 1, a gap exists between adjacent two of the barrier portions.

17. The display substrate according to claim 15, wherein when N is greater than 1, the heights of the N barrier portions are the same, or

18. The display substrate according to any one of claims 1-10, wherein a distance between the barrier and the bending region is smaller than a distance between the barrier and the display region.

19. The display substrate according to any one of claims 5 to 10, further comprising a bank which is located in the non-display region and is located on a side of the barrier portion near the display region, the bank and the barrier portion not overlapping in a direction perpendicular to the substrate;

20. A display device comprising the display substrate according to any one of claims 1 to 19.