Display screen, display device and preparation method of display screen

Abstract

The embodiment of the invention discloses a display screen, a display device and a preparation method of the display screen, the display screen comprises a substrate, the substrate comprises a display area, a non-display area and a dam, the dam is located on one side of the substrate, the dam surrounds the display area and is arranged in the non-display area, and only one circle of dam is arranged; the anti-overflow part is arranged on one side, far away from the substrate, of the dam or on one side, far away from the display area, of the dam; the packaging layer is located on one side of the substrate, at least part of the packaging layer covers the dam, the packaging layer comprises a first inorganic layer, an organic layer and a second inorganic layer which are arranged in a stacked mode in the direction away from the substrate, and the dam is located in an area defined by the edge of the organic layer.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display screen, a display device and a method for preparing the display screen. Background Art

[0002] "Full screen" technology has been developing continuously in the past two years. In order to increase the proportion of display area in consumer electronics, various designs have evolved, such as bangs screen, water drop screen, punch-hole screen, under-screen camera and other solutions. Until the under-screen camera technology, the display screen in mobile phones and tablets has been the most complete, and the screen-to-body ratio is currently the largest; if the display area ratio (Active Area, AA1) needs to be further increased, then compressing the screen frame is an effective direction. In this way, the smaller the frame, the larger the display area when the screen size remains unchanged. The existing technology has the problem of large display frame and color deviation in the ink transition area. Summary of the invention

[0003] The technical problem to be solved by the embodiments of the present invention is to provide a display screen, a display device and a method for manufacturing the display screen, which can meet the effect of a narrow frame of the display screen and reduce the color deviation in the transition area of ​​the display screen.

[0004] In order to solve the above technical problems, the present invention provides a display screen, comprising: a substrate, the substrate comprising a display area and a non-display area; a dam, the dam is located on one side of the substrate, the dam is arranged in the non-display area around the display area, and the dam is arranged in only one circle; an anti-overflow portion is arranged on a side of the dam away from the substrate or on a side of the dam away from the display area; an encapsulation layer, the encapsulation layer is located on one side of the substrate and at least partially covers the dam, and comprises a first inorganic layer, an organic layer, and a second inorganic layer stacked in a direction away from the substrate, wherein the dam is within an area surrounded by the edge of the organic layer.

[0005] In the above-mentioned display screen, the setting of a circle of dams significantly reduces the border width. By setting an anti-overflow portion, it can cooperate with the dam to reduce the overflow of the organic layer, thereby realizing a narrow frame design. At the same time, the dam is within the area enclosed by the edge of the organic layer, so that the organic layer can extend to the outside of the dam, thereby narrowing the width of the transition zone of the organic layer in the display area and reducing the color deviation at the edge of the display area.

[0006] In a feasible implementation, the orthographic projection of the organic layer on the substrate covers the orthographic projection of the dam on the substrate. In this way, the width of the transition zone of the organic layer can be further narrowed, thereby further reducing the color deviation at the edge of the display area. At the same time, the organic layer covers both sides of the dam, which can improve the stress on the dam and avoid stress concentration.

[0007] In a feasible implementation, the edge of the orthographic projection of the organic layer on the substrate is located on a side of the orthographic projection of the dam on the substrate that is away from the display area.

[0008] In a feasible implementation, the overflow prevention portion includes at least one isolation strip, the isolation strip extends along the dam away from the substrate, and the isolation strip is located in the non-display area. In this way, the organic layer can be isolated to prevent external water and oxygen from entering the organic layer in the display area.

[0009] In a feasible implementation, the isolation bar is disposed on a side of the dam facing away from the substrate, and is located at an end of the dam close to the display area.

[0010] In a feasible implementation, in the direction in which the dam is away from the substrate, the organic layer located in the display area has a first height relative to the substrate, and the organic layer located in the non-display area has a second height, the second height is less than the first height, and the height difference between the first height and the second height is less than the height of the isolation strip.

[0011] In a feasible implementation manner, a side of the isolation strip facing away from the substrate is in contact with the second inorganic layer.

[0012] In a feasible implementation, the orthographic projection of the first inorganic layer on the substrate at least partially overlaps with the orthographic projection of the dam on the substrate, so that when the isolation strip is formed on the organic layer, it is possible to avoid touching the first inorganic layer, thereby preventing the first inorganic layer from cracking and expanding at this position.

[0013] In a feasible implementation, the first inorganic layer extends from the display area to a side wall of the dam close to the display area.

[0014] In a feasible implementation, the edge of the orthographic projection of the organic layer on the substrate is located on the side of the orthographic projection of the first inorganic layer on the substrate away from the display area, the orthographic projection of the second inorganic layer on the substrate covers the orthographic projections of the first inorganic layer and the organic layer on the substrate, and the orthographic projection area of ​​the second inorganic layer on the substrate is larger than the orthographic projection area of ​​the first inorganic layer on the substrate and the orthographic projection area of ​​the organic layer on the substrate. In this way, the second inorganic layer can cover the first inorganic layer and the organic layer, and the second inorganic layer can be directly cured and sealed with the substrate at the edge away from the display area, thereby improving the packaging reliability.

[0015] In a feasible implementation, the curing rate of the organic layer in the display area is greater than the curing rate of the organic layer in the non-display area, so that stress concentration in the non-display area when bent can be reduced and packaging reliability can be improved.

[0016] In a feasible implementation, the dam includes a plurality of sub-dams, which are arranged at intervals in the peripheral direction surrounding the display area, and the orthographic projection of the organic layer on the substrate does not overlap with the orthographic projection of the dam on the substrate. In this way, the discontinuous dam can allow the ink to overflow to the outside of the dam better, reduce the stress of the first inorganic layer on the outside of the dam, and improve the packaging reliability.

[0017] In a feasible implementation, the first inorganic layer extends from the display area to a side of the dam away from the display area.

[0018] In a feasible implementation, the anti-overflow portion is a groove, which is adjacent to the dam and is arranged on a side of the dam away from the display area. In this way, the groove can prevent ink from overflowing to the edge of the screen, achieving a narrow frame while avoiding the impact on other structures.

[0019] In a feasible implementation, the orthographic projection of the groove on the substrate is arranged around the dam;

[0020] In a feasible implementation, the groove includes a plurality of sub-grooves, the plurality of sub-grooves are arranged around the dam, and the orthographic projections of the sub-grooves on the substrate and the orthographic projections of the sub-dams on the substrate are alternately arranged.

[0021] Accordingly, the present invention also provides a method for preparing a display screen, comprising:

[0022] Providing a substrate, the substrate comprising a display area and a non-display area;

[0023] forming a dam, wherein the dam is on one side of the substrate and surrounds the display area and is arranged in the non-display area, and the dam is arranged in only one circle;

[0024] An anti-overflow portion and an encapsulation layer are formed, wherein the anti-overflow portion is arranged on a side of the dam away from the substrate or on a side of the dam away from the display area, and the encapsulation layer is located on one side of the substrate and at least partially covers the dam, including a first inorganic layer, an organic layer, and a second inorganic layer stacked in a direction away from the substrate, wherein the dam is within a region enclosed by an edge of the organic layer.

[0025] The manufacturing method of the display screen has a simple manufacturing process and is conducive to wide application.

[0026] Accordingly, the present invention also provides a display device, comprising any of the above-mentioned display screens. The display screen used in the above-mentioned display device has a narrow frame design, a large display area, a narrow transition zone at the edge of the display area, and a small color deviation, which is conducive to wide application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the structure of a display screen provided by an embodiment of the present invention;

[0028] Figure 2 is a top view of a substrate of a display screen provided by an embodiment of the present invention;

[0029] Figure 3 is a top view of the structure of the dam and groove of the display screen provided by another embodiment of the present invention,

[0030] Figure 4 is a schematic structural diagram of a display screen provided by another embodiment of the present invention;

[0031] Figure 5 is a schematic structural diagram of a display screen provided by another embodiment of the present invention;

[0032] Figure 6 is a schematic structural diagram of a display screen provided by another embodiment of the present invention;

[0033] Figure 7 is a flow chart of a method for preparing a display screen provided by an embodiment of the present invention;

[0034] Figure 8 yes Figure 7 A refinement diagram of step S730;

[0035] Fig. 9 The figure is a flow chart of a method for manufacturing a display screen provided by another embodiment of the present invention. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] In order to solve the above technical problems, the present invention provides a display screen.

[0039] See also Figure 1 to Figure 2 , Figure 1 is a schematic structural diagram of a display screen 100 provided in one embodiment of the present invention; Figure 2 It is a top view of the substrate 110 of the display screen 100 provided in one embodiment of the present invention. The display screen 100 provided in this embodiment includes: a substrate 110, a dam 120, an anti-overflow portion and an encapsulation layer. The substrate 110 includes a display area AA1 and a non-display area ABC1. The non-display area ABC1 includes a transition area A1, a flexible encapsulation area B1 and a cutting area CI. The dam 120 is located on one side of the substrate 110. The dam 120 is arranged in the non-display area ABC1 around the display area AA1. The dam 120 is arranged in only one circle. The dam 120 refers to a structure protruding from the substrate 110 on the side where the dam 120 is provided on the substrate 110. The specific protruding shape of the dam 120 is not a fixed shape and can be of various shapes. For example, it can be as follows Figure 1 The cross-section shown is a trapezoidal structure, and the dam 120 with such a structure can reduce the stress at the bottom of the dam 120 and ensure the structural stability of the dam 120. For another example, the cross-section of the dam 120 can also be a triangle, and the triangle can also achieve the structural stability effect of the trapezoid. The interface of the dam 120 can also be other irregular shapes. In short, as long as the dam 120 is a raised structure on the dam 120, it can be higher than the substrate 110 by a certain height. The dam 120 mentioned here is only set in one circle, which means that there is at most one dam 120 in a direction from the display area AA1 away from the non-display area ABC1. At the same time, this dam 120 has only one raised structure, and there is no need to have multiple raised structures such as multiple raised structures such as waves.

[0040] The encapsulation layer is located on one side of the substrate 110 and covers the dam 120. The encapsulation layer includes a first inorganic layer 131, an organic layer 132, and a second inorganic layer 133 stacked in a direction away from the substrate 110. The dam 120 is within the area surrounded by the edge of the organic layer 132. Specifically, the dam 120 is arranged in the flexible encapsulation area B1 of the non-display area ABC1. The dam 120 mentioned here is within the area surrounded by the edge of the organic layer 132, which can also be understood as the orthographic projection of the dam 120 on the substrate 110 is within the range surrounded by the orthographic projection of the organic layer 132 on the substrate 110. In other words, the orthographic projection of the edge of the organic layer 132 on the substrate 110 is located on the side of the orthographic projection of the dam 120 on the substrate 110 away from the display area AA1. It can also be said that the organic layer 132 extends from the display area AA1 to the outside of the dam 120, and the outside of the dam 120 is the side of the dam 120 away from the display area AA1. It can also be said that the organic layer 132 extends from the display area AA1 through the transition area of ​​the non-display area ABC1 to the outside of the dam 120 of the flexible encapsulation area. It can also be understood that in the process of forming the organic layer 132, the organic material of the organic layer 132 passes over, bypasses, overflows or other ways to extend from the display area AA1 at least to the non-display area ABC1 outside the dam 120.

[0041] The overflow prevention part is disposed on the side of the dam 120 away from the substrate 110 or on the side of the dam 120 away from the display area AA1. The overflow prevention part is used to stop or intercept the overflowing organic layer 132. The overflow prevention part can cooperate with the dam to reduce the overflow of the organic layer.

[0042] The transition zone is formed because the organic material forming the organic layer 132 has fluidity during the preparation of the organic layer 132. The organic material will not be cut off at the preparation cut-off position, but will flow outward from the preparation cut-off position. The thickness of the organic layer 132 gradually decreases in the direction away from the display area AA1. The area where the thickness of the organic layer 132 gradually decreases is the transition zone. If the thickness difference in the transition zone is too large, a certain color deviation will occur. In this embodiment, because the organic layer 132 flows outward from the dam 120, it can be said that the organic layer 132 overflows from the display area AA1 to the dam 120, or overflows to the outside of the dam 120 of the non-display area ABC1, so that the leveling area of ​​the organic layer 132 in the inner range of the dam 120 is reduced, that is, the range of the transition zone is reduced. At the same time, the thickness difference of the organic layer 132 in the transition zone is very small, and the color deviation phenomenon will also be changed. In this way, the width of the organic layer 132 in the transition zone can be reduced, thereby reducing the influence of the color deviation in the transition zone on the display range, thereby expanding the range of the display area AA1, reducing the non-display area ABC1, and further realizing a narrow frame.

[0043] In this embodiment, the provision of a dam 120 significantly reduces the frame width and realizes a narrow frame design. By providing an anti-overflow portion, it can cooperate with the dam 120 to reduce the overflow of the organic layer 132. At the same time, the dam 120 is within the area surrounded by the edge of the organic layer 132, so that the organic layer 132 can extend to the outside of the dam 120, thereby narrowing the width of the organic layer 132 in the transition zone of the non-display area ABC1, and reducing the color deviation at the edge of the display area AA1. The range of the display area AA1 is increased, and the narrow frame is further realized.

[0044] According to an embodiment of the present invention, Figure 1 As shown, the orthographic projection of the organic layer 132 on the substrate 110 covers the orthographic projection of the dam 120 on the substrate 110. It can also be said that the organic layer 132 covers the dam 120. Optionally or preferably, the edge of the orthographic projection of the organic layer 132 on the substrate 110 is located on the side of the upper orthographic projection of the dam 120 on the substrate 110 away from the display area AA1. As an example, the organic layer 132 can be prepared by inkjet printing, and the preparation cutoff position of the organic material of the inkjet printing of the organic layer 132 can be close to the inner side of the dam 120, and the height of the dam 120 can be lower than the height of the organic layer 132. In this way, when the organic material is leveled from the preparation cutoff position, it overflows the dam 120 to the outside of the dam 120. In this way, the width of the transition zone can be further narrowed, and at the same time, the thickness reduction interval of the organic layer 132 in the transition zone is small, and the color deviation at the edge of the display area AA1 is very small. At the same time, the organic layer 132 covers both sides of the dam 120 , and the stress difference between the two sides of the dam 120 caused by the organic layer 132 is also reduced, which can improve the stress on the dam 120 and avoid stress concentration.

[0045] For further information, please refer to Figure 1, the overflow prevention part includes two isolation strips 134. The isolation strips 134 extend along the dam 120 away from the substrate 110, and the isolation strips 134 are located in the non-display area ABC1. The isolation strips 134 penetrate the organic layer 132 along the thickness direction of the organic layer 132. The isolation strips 134 are located in the non-display area ABC1. In a feasible embodiment, the organic layer 132 may also be provided with only one isolation strip 134, or more than two isolation strips 134. In this way, the organic layer 132 can be isolated to prevent external water and oxygen from entering the organic layer 132 of the display area AA1. As an example, the preparation method of the isolation strip 134 is as follows: prepare the organic layer 132; cut the organic layer 132 along the thickness direction of the organic layer 132 by laser cutting on the organic layer 132 of the non-display area ABC1 to form at least one cutting groove, and the cutting groove divides the organic layer 132 into discontinuous areas; and then add the isolation strip 134 material in the cutting groove to form the isolation strip 134. Furthermore, the material of the isolation strip 134 can be the same material as that of the second inorganic layer 133, which can improve the isolation effect. Furthermore, adding the isolation strip 134 material in the cutting groove can be carried out simultaneously with the preparation of the second inorganic layer 133, that is, the second inorganic layer 133 is directly prepared on the cut organic layer 132, and the inorganic material of the second inorganic layer 133 flows into the cutting groove to form a cutting strip. In this way, the preparation process is simple, and the isolation strip 134, the organic layer 132 and the second inorganic layer 133 are firmly bonded, the packaging effect is good, and the adverse effects of introducing other materials on the reliability of packaging are avoided.

[0046] Optionally or preferably, the isolation bar 134 is disposed on a side of the dam 120 facing away from the substrate 110, and is disposed at an end of the dam 120 close to the display area AA1. In this way, the isolation bar 134 is closer to the organic layer 132 of the display area AA1, and can "earlier" and "faster" block, block or cut off the connection between the organic layer 132 of the display area AA1 and the organic layer 132 of the non-display ABC1 part, preventing external water and oxygen from entering the organic layer 132 of the display area AA1, and further improving the encapsulation effect.

[0047] Optionally or preferably, in the direction in which the dam 120 is away from the substrate 110, the organic layer 132 located in the display area AA1 has a first height relative to the substrate 110, and the organic layer 132 located in the non-display area ABC1 has a second height, the second height is less than the first height, and the height difference between the first height and the second height is less than the height of the isolation bar 134. In this way, the isolation bar 134 can completely block, obstruct or cut off the connection between the organic layer 132 in the display area AA1 and the organic layer 132 in the non-display ABC1 part, prevent external water and oxygen from entering the organic layer 132 in the display area AA1, and improve the packaging effect.

[0048] Optionally or preferably, the side of the isolation strip 134 facing away from the substrate 110 is in contact with the second inorganic layer 133. In this way, the isolation strip 134 is sealed with the second inorganic layer 133, which can improve the encapsulation effect. As an example, the preparation method of such an isolation strip 134 is as follows: prepare the organic layer 132; cut the organic layer 132 along the thickness direction of the organic layer 132 by laser cutting on the organic layer 132 in the non-display area ABC1 to form at least one cutting groove, and the cutting groove divides the organic layer 132 into discontinuous areas; then form the second inorganic layer 133 above the organic layer 132, and the second inorganic layer 133 flows into the cutting groove to form the isolation strip 134. In this way, the isolation strip 134 is formed integrally with the second inorganic layer 133, which can improve the encapsulation effect.

[0049] Further, the orthographic projection of the first inorganic layer 131 on the substrate 110 at least partially overlaps with the orthographic projection of the dam 120 on the substrate 110. Optionally or preferably, the first inorganic layer 131 extends from the display area AA1 to a side wall of the dam 120 close to the display area AA1. Figure 1 , the orthographic projection of the boundary of the first inorganic layer 131 on the substrate 110 is located on the side of the orthographic projection of the isolation strip 134 on the substrate 110 close to the display area AA1. It can also be said that the first inorganic layer 131 covers the display area AA1 and part of the non-display area ABC1, and the end point of the coverage range of the first inorganic layer 131 in the direction away from the display area AA1 is within the range formed by the isolation strip 134. In this way, when the isolation strip 134 is formed on the organic layer 132, it is possible to avoid touching the first inorganic layer 131, and to avoid cracks in the first inorganic layer 131 at this position and expansion, thereby improving the success rate of the display screen 100 preparation and reducing the defective rate. Furthermore, as Figure 1 As shown, the isolation strip 134 is above the dam 120, or in other words, the orthographic projection of the isolation strip 134 on the substrate 110 is within the orthographic projection range of the dam 120 on the substrate 110. In this way, when the isolation strip 134 is formed on the organic layer 132 or the cutting groove is formed by cutting, the substrate 110 can be avoided from being cut, thereby avoiding damage to the substrate 110 and reducing the defective rate of finished products.

[0050] In a possible implementation, please refer to Figure 1, the edge of the orthographic projection of the organic layer 132 on the substrate 110 is located on the side of the orthographic projection of the first inorganic layer 131 on the substrate 110 away from the display area AA1. The orthographic projection of the second inorganic layer 133 on the substrate 110 covers the orthographic projections of the first inorganic layer 131 and the organic layer 132 on the substrate 110. The orthographic projection area of ​​the second inorganic layer 133 on the substrate 110 is larger than the orthographic projection area of ​​the first inorganic layer 131 on the substrate 110 and the orthographic projection area of ​​the organic layer 132 on the substrate 110. It can also be said that the first inorganic layer 131 covers the display area AA1 and at least part of the non-display area ABC1, the organic layer 132 covers the first inorganic layer 131 of the display area AA1 and at least part of the first inorganic layer 131 of the non-display area ABC1, and the second inorganic layer 133 continuously covers the first inorganic layer 131, the organic layer 132 and the uncovered substrate 110. The second inorganic layer 133 covers the transition area, the flexible encapsulation area and the cutting area from the display area AA1 to the non-display area ABC1, and is the outermost layer of the encapsulation layer. In this way, the second inorganic layer 133 can cover the first inorganic layer 131 and the organic layer 132, and the second inorganic layer 133 can be directly cured and sealed with the substrate 110 at the edge away from the display area AA1, thereby improving the encapsulation reliability.

[0051] In the encapsulation layer of the present invention, the positions of the first inorganic layer 131 and the organic layer 132 are not limited thereto.

[0052] Figure 3 FIG. 2 is a top view of a dam 220 and a groove 240 of a display screen 200 provided by another embodiment of the present invention. Figure 4 2 is a schematic structural diagram of a display screen 200 provided in another embodiment of the present invention. Figure 3 and Figure 4 The substrate 210 and the dam 220 of the embodiment shown are respectively Figure 1 and Figure 2 The structures of the substrate 110 and the dam 120 in the illustrated embodiment are similar and will not be described in detail herein.

[0053] According to an embodiment of the present invention, please refer to Figure 3 and Figure 4. The dam 220 includes a plurality of sub-dams. The plurality of sub-dams are spaced apart in the peripheral direction surrounding the display area AA2. The orthographic projection of the organic layer 232 on the substrate 210 does not overlap with the orthographic projection of the dam 220 on the substrate 210. It can also be said that the organic layer 232 extends from the intervals between the sub-dams to the side of the dam 220 away from the display area AA2. Optionally or preferably, the first inorganic layer 231 extends from the display area AA1 to the side of the dam 220 away from the display area AA1. In this way, the discontinuous dam 220 can allow the organic material to overflow better to the outside of the dam 220, reducing the stress of the first inorganic layer 231 on the outside of the dam 220. At the same time, the organic material does not overflow from the top of the dam 220 or above the dam 220, so that the second inorganic layer 233 can directly cover the first inorganic layer 231 on the dam 220. The inorganic materials of the first inorganic layer 231 and the second inorganic layer 233 are similar, which can be better bonded and improve the packaging reliability.

[0054] For further information, please refer to Figure 3 and Figure 4, the overflow prevention part is a groove 240. The groove 240 is adjacent to the dam 220 and is arranged on the side of the dam 220 away from the display area AA2. In this way, the groove 240 can prevent the ink from overflowing to the edge of the screen body, realizing a narrow frame while avoiding the impact on other structures. As an example, the substrate 210 may include a display unit and an array substrate. Among them, the display unit is located in the display area AA2 of the array substrate 210. The display unit has a light-emitting device, and thus can perform effective light-emitting display. For example, the display unit can have an OLED layer and a PDL layer, and the corresponding array substrate may include a pixel circuit layer and a substrate. The substrate, as the physical basis of the display device, provides a platform for the pixel circuit layer to attach and support. It is usually made of transparent glass or plastic, and for some OLED (organic light-emitting diode) displays, it is flexible plastic. The substrate not only provides mechanical strength, but also needs to have good flatness and transparency so that light can penetrate and reach the display layer. The first groove 240 can be etched on the substrate 210. Further, the depth of the groove 240 on the substrate 210 reaches the bottom of the substrate 210, so that the groove 240 can not only accommodate the overflowed organic material as mentioned above, but also reduce the stress on the outside of the dam 220. Further, the substrate can be made of polymer materials such as polyimide, polyethylene terephthalate and polyarylethersulfone, and the polymer organic material can be well bonded with the organic material overflowing from the organic layer 232, thereby ensuring the reliability of the package between the organic layer 232 and the substrate 210. Further, optionally or preferably, the orthographic projection of the groove 240 on the substrate 210 is arranged around the dam 220. In this way, the surrounding groove 240 can evenly intercept the ink and improve the interception effect. Optionally or preferably, the groove 240 includes a plurality of sub-grooves, and the plurality of sub-grooves are arranged around the dam 220, and the orthographic projection of the sub-grooves on the substrate 210 and the orthographic projection of the sub-dam on the substrate 210 are arranged alternately. In this way, the discontinuous dam 220 and sub-grooves can allow the organic material to overflow to the outside of the dam 220 better, reduce the stress of the first inorganic layer 231 on the outside of the dam 220, and improve the packaging reliability. Furthermore, the volume of the groove 240 is larger than the volume of the overflowed organic material of the organic layer 232, that is, it can completely accommodate the overflowed or leveled organic material, further preventing the ink from overflowing the edge of the screen body and hindering other wiring settings, such as TP wiring, etc.

[0055] In addition, the embodiment of the present invention does not impose any limitation on the cross-sectional shape of the groove 240 . For example, the cross-sectional shape of the groove 240 may also be a regular trapezoid, a rectangle, or a square.

[0056] In a feasible implementation, the curing rate of the organic layer 132 of the display area AA1 is greater than the curing rate of the organic layer 132 of the non-display area ABC1. The curing rate of the organic layer 132 affects its bending resistance. In this way, the stress concentration when the non-display area ABC1 is bent can be reduced, and the packaging reliability can be improved. Further, the curing rate of the organic layer 132 is 90%-95%. The organic layer 132 of the display area AA1 can be cured by ultraviolet light irradiation. The higher the curing rate of the organic layer 132 of the display area AA1, the higher its hardness and the stronger its adhesion to other film layers; and the lower the curing rate, the greater the stretchability of the organic layer 132 of the non-display area ABC1, the stronger its anti-deformation ability, and the easier it is to bend. Further, the curing rate of the organic layer 132 can be gradually reduced from 95% to 90% from the display area AA1 to the direction away from the display area AA1 to the non-display area ABC1, so that the bending resistance of the organic layer 132 can be smoothly transitioned to avoid stress concentration. Furthermore, different curing times and curing wavelengths may be used for the organic materials in the display area AA1 and the non-display area ABC1, or different transmittance masks may be used to set different curing rates for the display area AA1 and the non-display area ABC1 outside the dam 120, so that the ultraviolet energy obtained by the organic layer 132 in the display area AA1 is greater than the ultraviolet energy obtained by the organic layer 132 in the non-display area ABC1, thereby making the curing rate of the organic layer 132 in the display area AA1 greater than the curing rate of the organic layer 132 in the non-display area ABC1. For example: the shorter the ultraviolet irradiation time obtained by the organic layer 132 in the non-display area ABC1, the smaller the ultraviolet irradiation energy obtained by the organic layer 132 in the non-display area ABC1, so that the bending resistance of the organic layer 132 in the non-display area ABC1 is high. Specifically, the areas with different curing rate requirements can be processed in batches, and the ultraviolet irradiation time for different curing requirements is different, and the ultraviolet irradiation time of the non-display area ABC1 is lower than the ultraviolet irradiation time of the display area AA1. Or, for another example: a mask is set on the organic layer 132, and the transmittance of the mask corresponding to the display area AA1 and the non-display area ABC1 is different. Then, ultraviolet irradiation is performed for the same duration. The smaller the transmittance of the mask corresponding to the non-display area ABC1, the smaller the ultraviolet irradiation energy obtained by the organic layer 132 of the corresponding non-display area ABC1, so that the bending resistance of the organic layer 132 of the non-display area ABC1 is high. Specifically, the areas with different curing rate requirements can be processed in batches, and the corresponding mask transmittances on the organic layers 132 with different curing rate requirements are different. The organic layer 132 is formed in a concentrated manner, and then ultraviolet irradiation curing is performed for the same duration. The transmittance of the mask of the organic layer 132 of the non-display area ABC1 is lower than the transmittance of the mask of the organic layer 132 of the display area AA1.

[0057] In the display screen of the present invention, the positions of the first inorganic layer and the organic layer of the encapsulation layer are not limited thereto.

[0058] Figure 5 FIG. 3 is a schematic diagram of the structure of a display screen 300 provided in another embodiment of the present invention. Figure 5 The organic layer 332 and the bank 320 of the embodiment shown are respectively Figure 1 The organic layer 132 and the dam 120 of the embodiment shown in the figure are similar in structure, and the groove 340 is similar to the Figure 4 The structure of the groove 240 in the illustrated embodiment is similar and will not be described in detail herein.

[0059] According to an embodiment of the present invention, the organic layer 332 overflows from the dam 320 into the groove 340 during preparation, and the groove 340 can also play a role in Figure 4 The effect of the groove 240 in the embodiment shown is that the groove 340 can prevent the ink from overflowing to the edge of the screen, achieving a narrow frame while avoiding the impact on other structures. At the same time, the setting of a dam 320 significantly reduces the frame width, achieving a narrow frame design, and the dam 320 is within the area surrounded by the edge of the organic layer 332, so that the organic layer 332 can extend to the outside of the dam 320, thereby narrowing the width of the organic layer 332 in the transition area A3 of the non-display area ABC3, while reducing the color deviation at the edge of the display area AA3, increasing the range of the display area AA3, and further achieving a narrow frame.

[0060] Figure 6 FIG. 4 is a schematic structural diagram of a display screen 400 provided in another embodiment of the present invention. Figure 6 The substrate 410, the organic layer 432 and the dam 420 of the embodiment shown are respectively Figure 1 The structures of the substrate 110 , the organic layer 132 and the dam 120 in the illustrated embodiment are similar and will not be described in detail herein.

[0061] According to an embodiment of the present invention, the first inorganic layer 431 and the second inorganic layer 433 are connected at an edge away from the display area AA4, specifically, at the cutting area C2, to cover the organic layer 432. In other words, the orthographic projection of the first inorganic layer 431 on the substrate 410 coincides with the orthographic projection of the second inorganic layer 433 on the substrate 410, and the orthographic projection area of ​​the organic layer 432 on the substrate 410 is smaller than the orthographic projection area of ​​the first inorganic layer 431 on the substrate 410. It can also be said that the organic layer 432 covers part of the first inorganic layer 431, the second organic layer 432 covers all of the organic layer 432 and the first inorganic layer 431 not covered by the organic layer 432, and the orthographic projection area of ​​the second inorganic layer 433 on the substrate 410 is larger than the orthographic projection area of ​​the first inorganic layer 431 on the substrate 410. The first inorganic layer 431 and the second inorganic layer 433 are both made of inorganic materials, have similar structures, and have good bonding effects. They can better seal the organic layer 432 , effectively cut off the path of water and oxygen invasion, and improve the packaging reliability of the display screen 400 .

[0062] According to the embodiment of the present invention, the first inorganic layer 531 continuously covers the display area AA5 and the entire dam 520 of the substrate 510. It can also be said that the orthographic projection of the first inorganic layer 531 on the substrate 510 covers the orthographic projection of the dam 520 on the substrate 510. It can also be said that the orthographic projection of the edge of the first inorganic layer 531 on the substrate 510 on the side of the dam 520 away from the display area AA5 is on the side of the orthographic projection of the edge on the substrate 510 away from the display area AA5. It can also be said that the first inorganic layer 531 covers the side of the display area AA5 to the side of the dam 520 away from the display area AA5. In this way, the first inorganic layer 531 can balance the stress on both sides of the dam 520 on the one hand, and on the other hand, it can make the thickness of the flexible encapsulation area B5 thinner, and achieve a better smooth transition of thickness reduction from the flexible encapsulation area B5 to the cutting area C5. The smooth transition of the edge also improves the feel of the display screen 500 when it is used in a handheld device, reducing the edge cutting feel.

[0063] Figure 7 1 is a flow chart of a method for preparing a display screen provided by an embodiment of the present invention. The method comprises the following steps:

[0064] S710, providing a substrate, wherein the substrate includes a display area and a non-display area;

[0065] S720, forming a dam, wherein the dam is on one side of the substrate and is arranged in the non-display area around the display area, and the dam is arranged in only one circle;

[0066] S730. Form an anti-overflow portion and an encapsulation layer, wherein the anti-overflow portion is arranged on a side of the dam away from the substrate or on a side of the dam away from the display area, and the encapsulation layer is located on one side of the substrate and at least partially covers the dam, including a first inorganic layer, an organic layer, and a second inorganic layer stacked in a direction away from the substrate, wherein the dam is within an area enclosed by an edge of the organic layer.

[0067] The manufacturing method of the display screen only has one circle of dams, and the dams are within the area surrounded by the edge of the organic layer, so that a narrow frame is achieved while reducing color deviation. The manufacturing process is simple and is conducive to wide application.

[0068] Figure 8 Yes Figure 7 The detailed diagram of step S730 in FIG. 1 is based on the embodiment of the present invention. Fig. 9 and Figure 1 , step S730 may include the following steps:

[0069] S731, forming a first inorganic layer 131 from the display area AA1 of the substrate 110 to a side surface of the dam 120 close to the display area AA1;

[0070] S732, using inkjet printing, the ink printing area is cut off at the side of the dam 120 close to the display area AA1, and the organic ink overflows from the top of the dam 120 to the outside of the dam 120 to form an organic layer 132;

[0071] S733, forming a cutting groove above the dam 120 by cutting to separate the organic layer 132;

[0072] S734 , forming a second inorganic layer 133 on the organic layer 132 , the material of the second inorganic layer 133 flows into the cutting groove to form a cutting strip 134 , which is an overflow prevention portion and is formed together with the second inorganic layer 133 .

[0073] Fig. 9 FIG. 1 is a flow chart of a method for manufacturing a display screen provided by another embodiment of the present invention. Figure 8 , Figure 3 and Figure 4 According to an embodiment of the present invention, the process steps for preparing the display screen may also be:

[0074] S910, providing a substrate 210, the substrate 210 including a display area AA2 and a non-display area ABC2;

[0075] S920, forming a discontinuous dam 220 on one side of the substrate 210, wherein the dam 220 surrounds the display area AA2 and is disposed in the non-display area ABC2;

[0076] S930, on the substrate 210, an overflow prevention portion is formed on a side of the adjacent dam 220 away from the display area AA1, and the overflow prevention portion is a groove 240;

[0077] S940, forming a first inorganic layer 231 from the display area AA2 of the substrate to a side of the dam 220 away from the display area AA2;

[0078] S950, the ink printing area is cut off at the side of the dam 220 close to the display area AA2 by inkjet printing, and the organic ink overflows from the intervals between the discontinuous dams 220 to the outside of the dam 220 (or to the inside of the groove 240) to form the organic layer 232;

[0079] S960 , forming a second inorganic layer 233 on the organic layer 232 , wherein an edge of the second inorganic layer 233 covers the cutting area C1 of the non-display area ABC2 of the substrate 210 .

[0080] Accordingly, the present invention also provides a display device, comprising any of the above display screens. The above display device may be a mobile phone, a computer, a television, a monitor, etc., which includes a display screen. The display screen may be an organic light-emitting display screen, or may be other types of display screens, such as a liquid crystal display screen. The present application is not limited thereto. The display screen used in the display device provided in the present application has a narrow frame design, a large display area, and a narrow width of the color deviation zone at the edge of the display area, with less color deviation, which is conducive to wide application.

[0081] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of this specification. Although not explicitly stated here, those skilled in the art may make various modifications, improvements and corrections to this specification. Such modifications, improvements and corrections are suggested in this specification, so such modifications, improvements and corrections still belong to the spirit and scope of the exemplary embodiments of this specification.

[0082] At the same time, this specification uses specific words to describe the embodiments of this specification. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of this specification. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures or characteristics in one or more embodiments of this specification can be appropriately combined.

[0083] In addition, unless explicitly stated in the claims, the order of the processing elements and sequences described in this specification, the use of alphanumeric characters, or the use of other names are not intended to limit the order of the processes and methods of this specification. Although the above disclosure discusses some invention embodiments that are currently considered useful through various examples, it should be understood that such details are only for illustrative purposes, and the attached claims are not limited to the disclosed embodiments. On the contrary, the claims are intended to cover all modifications and equivalent combinations that are consistent with the essence and scope of the embodiments of this specification.

[0084] Similarly, it should be noted that in order to simplify the description disclosed in this specification and thus help understand one or more embodiments of the invention, in the above description of the embodiments of this specification, multiple features are sometimes combined into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the subject matter of this specification are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0085] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of this specification are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0086] Each patent, patent application, patent application publication, and other materials, such as articles, books, specifications, publications, documents, etc., cited in this specification are hereby incorporated by reference in their entirety. Except for application history documents that are inconsistent with or conflicting with the contents of this specification, documents that limit the broadest scope of the claims of this specification (currently or later attached to this specification) are also excluded. It should be noted that if the descriptions, definitions, and / or use of terms in the materials attached to this specification are inconsistent or conflicting with the contents described in this specification, the descriptions, definitions, and / or use of terms in this specification shall prevail.

[0087] Finally, it should be understood that the embodiments described in this specification are only used to illustrate the principles of the embodiments of this specification. Other variations may also fall within the scope of this specification. Therefore, as an example and not a limitation, alternative configurations of the embodiments of this specification may be considered consistent with the teachings of this specification. Accordingly, the embodiments of this specification are not limited to the embodiments explicitly introduced and described in this specification.

Claims

1. A display screen, characterized in that: include: A substrate comprising a display area and a non-display area, A dam, the dam is located at one side of the substrate, the dam surrounds the display area and is arranged in the non-display area, and the dam is arranged in only one circle; an overflow prevention portion, arranged on a side of the dam away from the substrate or on a side of the dam away from the display area; The encapsulation layer is located on one side of the substrate and at least partially covers the dam, comprising a first inorganic layer, an organic layer and a second inorganic layer stacked in a direction away from the substrate, wherein the dam is within a region surrounded by an edge of the organic layer.

2. The display screen according to claim 1, characterized in that: The orthographic projection of the organic layer on the substrate covers the orthographic projection of the dam on the substrate; Preferably, an edge of the orthographic projection of the organic layer on the substrate is located on a side of the upper orthographic projection of the dam on the substrate facing away from the display area.

3. The display screen according to claim 1, characterized in that: The overflow prevention portion includes at least one isolation bar, the isolation bar extends along the dam away from the substrate, and the isolation bar is located in the non-display area; Preferably, the isolation strip is disposed on a side of the dam away from the substrate, and is located at an end of the dam close to the display area; Preferably, in a direction in which the dam is away from the substrate, the organic layer located in the display area has a first height relative to the substrate, and the organic layer located in the non-display area has a second height, the second height is less than the first height, and the height difference between the first height and the second height is less than the height of the isolation strip; Preferably, a side of the isolation strip facing away from the substrate is in contact with the second inorganic layer.

4. The display screen according to claim 3, characterized in that: The orthographic projection of the first inorganic layer on the substrate at least partially overlaps with the orthographic projection of the dam on the substrate; Preferably, the first inorganic layer extends from the display area to a side wall of the dam close to the display area.

5. The display screen according to claim 1, characterized in that: The edge of the orthographic projection of the organic layer on the substrate is located on the side of the orthographic projection of the first inorganic layer on the substrate away from the display area, the orthographic projection of the second inorganic layer on the substrate covers the orthographic projections of the first inorganic layer and the organic layer on the substrate, and the orthographic projection area of ​​the second inorganic layer on the substrate is larger than the orthographic projection area of ​​the first inorganic layer on the substrate and the orthographic projection area of ​​the organic layer on the substrate.

6. The display screen according to claim 1, characterized in that: The curing rate of the organic layer in the display area is greater than the curing rate of the organic layer in the non-display area.

7. The display screen according to claim 1, characterized in that: The dam comprises a plurality of sub-dams, the plurality of sub-dams are arranged at intervals in a peripheral direction surrounding the display area, and the orthographic projection of the organic layer on the substrate does not overlap with the orthographic projection of the dam on the substrate; Preferably, the first inorganic layer extends from the display area to a side of the dam away from the display area.

8. The display screen according to claim 1 or 7, characterized in that: The overflow prevention portion is a groove, which is adjacent to the dam and is arranged on a side of the dam away from the display area; Preferably, the orthographic projection of the groove on the substrate is arranged around the dam; Preferably, the groove comprises a plurality of sub-grooves, the plurality of sub-grooves are arranged around the dam, and the orthographic projections of the sub-grooves on the substrate and the orthographic projections of the sub-dams on the substrate are alternately arranged.

9. A method for preparing a display screen, characterized in that: include: Providing a substrate, the substrate comprising a display area and a non-display area; forming a dam, wherein the dam is on one side of the substrate and surrounds the display area and is arranged in the non-display area, and the dam is arranged in only one circle; An anti-overflow portion and an encapsulation layer are formed, wherein the anti-overflow portion is arranged on a side of the dam away from the substrate or on a side of the dam away from the display area, and the encapsulation layer is located on one side of the substrate and at least partially covers the dam, including a first inorganic layer, an organic layer, and a second inorganic layer stacked in a direction away from the substrate, wherein the dam is within a region enclosed by an edge of the organic layer.

10. A display device, characterized in that: Comprising the display screen as described in any one of claims 1-8.

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