Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel comprises a display area and a non-display area arranged on the peripheral side of the display area, the display panel further comprises an array substrate, a light-emitting device layer, a constraint structure and a polaroid, and the light-emitting device layer is arranged on the array substrate and located in the display area; the constraint structure is arranged on the array substrate and located in the non-display area; the polaroid is arranged on the side, away from the array substrate, of the light emitting device layer, the orthographic projection of the polaroid on the array substrate and the orthographic projection of the constraint structure on the array substrate are at least partially overlapped, and the polaroid is connected with the constraint structure. The constraint structure has a constraint effect on the edge of the polaroid, and the polaroid in the display area is more stable and is not easy to deform due to the influence of temperature and humidity, so that a film layer of the display area is not damaged, and the yield of the display panel is improved.

Description

Technical Field

[0001] The present invention belongs to the field of display technology, and in particular relates to a display panel and a display device. Background Art

[0002] With the development of display technology, the application of AMOLED (Active-matrix organic light-emitting diode) display panels is becoming more and more widespread.

[0003] Polarizers are generally installed on AMOLED display panels. Polarizers are easily deformed by temperature and humidity, which can cause stress on the film material, causing damage to the film, producing adverse effects and reducing the yield of the display panel. Summary of the invention

[0004] An object of the present invention is to provide a display panel and a display device, aiming to improve the yield of the display panel.

[0005] A first aspect of the present invention provides a display panel, which includes a display area and a non-display area arranged on the periphery of the display area. The display panel also includes an array substrate, a light-emitting device layer, a constraint structure and a polarizer. The light-emitting device layer is arranged on the array substrate and is located in the display area; the constraint structure is arranged on the array substrate and is located in the non-display area; the polarizer is arranged on the side of the light-emitting device layer away from the array substrate, the orthographic projection of the polarizer on the array substrate at least partially overlaps with the orthographic projection of the constraint structure on the array substrate, and the polarizer is connected to the constraint structure.

[0006] In some embodiments, the display panel further comprises a dam, the dam being disposed between the display area and the constraining structure;

[0007] Preferably, there are multiple constraint structures, and the multiple constraint structures are arranged at intervals along the periphery of the display area;

[0008] Preferably, the plurality of constraint structures are symmetrically arranged along the geometric center point of the display area.

[0009] In some embodiments, the non-display area includes a fan-out area through which the wiring of the driving chip passes, and the orthographic projection of the fan-out area on the array substrate does not overlap with the orthographic projection of the constraint structure on the array substrate; or, part of the constraint structure is located in the fan-out area, and the orthographic projection of the constraint structure on the array substrate does not overlap with the orthographic projection of the wiring in the fan-out area on the array substrate.

[0010] In some embodiments, the constraining structure includes at least a first constraining layer and a second constraining layer sequentially stacked in a direction perpendicular to the array substrate;

[0011] Preferably, the array substrate comprises a substrate and a driving circuit layer arranged on the substrate, the driving circuit layer comprises a planarization layer, and the planarization layer is arranged on the same layer as the first constraining layer;

[0012] Preferably, in a direction pointing toward the array substrate, a cross-sectional area of ​​the first constraining layer gradually increases;

[0013] Preferably, the material of the first confinement layer includes positive photoresist.

[0014] In some embodiments, the display panel further includes a pixel definition layer, the pixel definition layer is provided with a pixel opening, the light emitting device layer includes a plurality of light emitting units, and the light emitting units are located in the pixel opening;

[0015] Preferably, the second constraint layer is disposed at the same layer as the pixel definition layer;

[0016] Preferably, in a direction pointing toward the array substrate, the cross-sectional area of ​​the second constraining layer gradually increases;

[0017] Preferably, the material of the second confinement layer includes positive photoresist.

[0018] In some embodiments, the display panel further comprises a supporting layer, and the supporting layer is arranged on a side of the light emitting device layer away from the array substrate;

[0019] Preferably, the constraint structure further includes a third constraint layer, which is arranged on a side of the second constraint layer away from the array substrate, and the third constraint layer is arranged on the same layer as the support layer;

[0020] Preferably, in a direction pointing toward the array substrate, a cross-sectional area of ​​the third constraining layer gradually increases;

[0021] Preferably, the material of the third constraining layer includes positive photoresist.

[0022] In some embodiments, the constraint structure further includes a constraint glue, and the constraint glue is arranged on a side of the second constraint layer away from the array substrate;

[0023] Preferably, in a direction pointing toward the array substrate, the cross-sectional area of ​​the constraining glue gradually decreases;

[0024] Preferably, the material of the constraining glue comprises negative photoresist.

[0025] In some embodiments, the polarizer is provided with a through hole for the constraint structure to pass through, and the polarizer is engaged with the constraint structure through the through hole.

[0026] In some embodiments, the display panel further includes an encapsulation layer, which is disposed between the light-emitting device layer and the polarizer;

[0027] Preferably, the constraint structure comprises a packaging extension layer, and the packaging extension layer is arranged at the same layer as the packaging layer.

[0028] In a second aspect, an embodiment of the present application further provides a display device, comprising a display panel according to any of the above embodiments.

[0029] The display panel of the embodiment of the present invention comprises an array substrate, a light-emitting device layer, a constraint structure and a polarizer, wherein the light-emitting device layer is arranged on the array substrate and is located in the display area; the constraint structure is arranged on the array substrate and is located in the non-display area, and the polarizer is arranged on the side of the light-emitting device layer away from the array substrate. Since the orthographic projection of the polarizer on the array substrate and the orthographic projection of the constraint structure on the array substrate at least partially overlap, the polarizer extends to the non-display area, and the polarizer is connected to the constraint structure, the constraint structure has a constraint effect on the edge of the polarizer, and the polarizer in the display area is more stable and is not easily deformed by temperature and humidity, so that the film layer in the display area will not be damaged, thereby improving the yield of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 A schematic cross-sectional view of a display panel provided in some embodiments of the present application;

[0032] Figure 2 A top view of a display panel provided in some embodiments of the present application;

[0033] Figure 3 A top view of a display panel provided in some other embodiments of the present application;

[0034] Figure 4 A top view of a display panel provided in some other embodiments of the present application;

[0035] Figure 5 A top view of a display panel provided in some further embodiments of the present application;

[0036] Figure 6 A top view of a polarizer provided in some embodiments of the present application.

[0037] Description of reference numerals:

[0038] 100, display panel; AA, display area; NA, non-display area; 10, array substrate; 11, substrate; 12, drive circuit layer; 20, light-emitting device layer; 30, constraint structure; 31, first constraint layer; 32, second constraint layer; 33, third constraint layer; 34, constraint glue; 35, encapsulation extension layer; 40, polarizer; 41, via; 50, dam; 60, fan-out area; 70, encapsulation layer. DETAILED DESCRIPTION

[0039] The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present invention, but cannot be used to limit the scope of the present invention, that is, the present invention is not limited to the described embodiments.

[0040] In the description of the present invention, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate positions or positional relationships only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0041] Reference to "embodiments" in the present invention means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present invention may be combined with other embodiments.

[0042] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0043] Existing display panels, such as AMOLED (Active-matrix organic light-emitting diode) display panels, are generally provided with polarizers on the upper surface of the touch layer. The polarizers can reduce the reflection of external light sources on the surface of the display screen, which helps to improve the visibility of the screen in a strong light environment, reduce glare, and make the displayed content clearer and more visible. The polarizer can block some interference from external light sources and enhance the contrast of the displayed content. This means that the black on the screen is deeper and the white is brighter, thus providing a better visual effect. However, the polarizer is easily deformed by temperature and humidity, which produces stress on the material of the display area film layer (such as the touch layer and the encapsulation layer) to which it is applied, causing damage to the film layer, resulting in defects and reducing the yield of the display panel.

[0044] In order to solve the above problems, embodiments of the present invention provide a display panel and a display device. Embodiments of the display panel and the display device are described below in conjunction with the accompanying drawings.

[0045] An embodiment of the present invention provides a display panel 100, which may be an AMOLED (Active-matrix organic light-emitting diode) display panel 100, or an organic light emitting diode (OLED) display panel 100. The display panel 100 may also be other types of display panels 100, such as a micro light emitting diode (Micro Light Emitting Diode, Micro-LED) or a quantum dot light emitting diode (Quantum Light Emitting Diode, QLED) display panel 100.

[0046] like Figure 1 As shown, the first aspect of the present invention provides a display panel 100, which includes a display area AA and a non-display area NA arranged on the periphery of the display area AA. The display panel 100 also includes an array substrate 10, a light-emitting device layer 20, a constraint structure 30 and a polarizer 40. The light-emitting device layer 20 is arranged on the array substrate 10 and is located in the display area AA; the constraint structure 30 is arranged on the array substrate 10 and is located in the non-display area NA; the polarizer 40 is arranged on the side of the light-emitting device layer 20 away from the array substrate 10, the orthographic projection of the polarizer 40 on the array substrate 10 at least partially overlaps with the orthographic projection of the constraint structure 30 on the array substrate 10, and the polarizer 40 is connected to the constraint structure 30.

[0047] The display area AA is a portion of the display panel 100 that is actually used to display images. The non-display area NA is a portion of the display panel 100 that is not used to display images and can be used for wiring, etc.

[0048] The array substrate 10 includes a substrate 11 and a driving circuit layer 12 disposed on the substrate 11. The substrate 11 may be a hard substrate 11 made of materials such as glass or plastic, or may be a flexible substrate 11 made of materials such as polyethersulfone (PES), polyacrylate (PAR), polyetherimide (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyarylate, polyimide (PI), polycarbonate (PC) or cellulose acetate propionate (CAP). A driving circuit for controlling the light-emitting unit to emit light is disposed in the driving circuit layer 12. The driving circuit layer 12 is generally composed of inorganic film layers such as a metal layer, a semiconductor layer (active layer), and an insulating layer. By patterning these inorganic film layers, a driving circuit for controlling the light-emitting structure to emit light can be formed. There are multiple implementation methods for its specific circuit structure, which will not be repeated here.

[0049] The light-emitting device layer 20 includes a plurality of light-emitting units, and the light-emitting unit may include a first electrode, a light-emitting structure, and a second electrode sequentially arranged in a direction away from the array substrate 10. After the first electrode and the second electrode are energized, the first electrode may be used as an anode, the second electrode may be used as a cathode, and the thin film transistor drives the light-emitting structure to emit light. The light-emitting structure may be formed by stacking a plurality of film layer structures, and illustratively, the light-emitting structure may include a hole injection layer, a hole transport layer, a light-emitting layer, an electron injection layer, and an electron transport layer stacked.

[0050] The constraint structure 30 is disposed on the array substrate 10 and is located in the non-display area NA. The constraint structure 30 may include multiple constraint structures 30, which are spaced apart along the periphery of the display area AA, or the constraint structure 30 is a whole and is disposed around the periphery of the display area AA. The constraint structure 30 may include multiple stacked film layers, or may be formed of a constraint column structure made of a certain material.

[0051] The polarizer 40 is disposed on a side of the light emitting device layer 20 away from the array substrate 10, the orthographic projection of the polarizer 40 on the array substrate 10 at least partially overlaps with the orthographic projection of the constraint structure 30 on the array substrate 10, and the polarizer 40 is connected to the constraint structure 30. In other words, the polarizer 40 extends from the display area AA to the non-display area NA, the edge of the polarizer 40 is located in the non-display area NA, and the edge of the polarizer 40 is connected to the constraint structure 30. Specifically, the edge of the polarizer 40 and the constraint structure 30 can be fixed by bonding, clamping, etc.

[0052] In the embodiment of the present application, the constraint structure 30 has a constraint effect on the edge of the polarizer 40, and the polarizer 40 in the display area AA region is more stable and is not easily deformed by temperature and humidity, thereby not causing damage to the film layer in the display area AA, thereby improving the yield of the display panel 100.

[0053] like Figure 2 As shown, in some embodiments, the display panel 100 further includes a dam 50 , and the dam 50 is disposed between the display area AA and the constraining structure 30 .

[0054] The dam 50 may be disposed around the display area AA. In addition to the dam 50, other film structures may also be disposed between the display area AA and the constraint structure 30. The dam 50 may be used to prevent the organic material in the encapsulation layer 70 in the display area AA from overflowing.

[0055] In some embodiments, there are multiple restraining structures 30 , and the multiple restraining structures 30 are arranged at intervals along the periphery of the display area AA.

[0056] The constraint structure 30 may be a columnar structure, which not only constrains but also supports the edge of the polarizer 40. A plurality of constraint structures 30 may be evenly spaced along the circumference of the display area AA, or may be non-uniformly spaced in certain areas, for example, no constraint structure 30 is provided in the fan-out area 60, but evenly spaced in other areas.

[0057] Please refer to Figure 2 and Figure 3 In some embodiments, the plurality of constraining structures 30 are symmetrically arranged along the geometric center point of the display area AA.

[0058] The geometric center refers to the most central position of an object with a certain symmetry, such as the center of a circle, the center of a sphere, the intersection of two diagonals of a parallelogram, etc. The display area AA can be a circle, a square, a rectangle, or other shapes. If the display area AA is a circle, the multiple constraint structures 30 are symmetrically arranged along the center of the circle; if the display area AA is a square, the multiple constraint structures 30 are symmetrically arranged along the center of the square. The embodiment of the present application can make the force on the polarizer 40 more uniform, prevent the phenomenon of damage caused by stress concentration, and further improve the firmness of the polarizer 40.

[0059] In some embodiments, the non-display area NA includes a fan-out area 60 for the wiring of the driving chip to pass through, and the orthographic projection of the fan-out area 60 on the array substrate 10 does not overlap with the orthographic projection of the constraint structure 30 on the array substrate 10 .

[0060] The fan-out area 60 refers to the transition area between the display area AA and the drive circuit. In this area, the signal lines are gradually expanded from the tightly arranged pixel connections to the edge of the display panel 100 to connect to the drive IC and other control circuits. The fan-out area 60 is responsible for extending the signal lines of the display area AA to a larger spacing so as to connect to the drive IC. The fan-out area 60 provides a connection from the pixel circuit of the display area AA to the external drive and control circuit. This includes power lines, data lines, control lines, etc.

[0061] Since the fan-out area 60 has many wirings, in the embodiment of the present application, the orthographic projection of the fan-out area 60 on the array substrate 10 does not overlap with the orthographic projection of the constraint structure 30 on the array substrate 10, that is, the constraint structure 30 is not set in the fan-out area 60, which will not affect the line arrangement of the fan-out area 60.

[0062] Alternatively, please refer to Figure 4 and Figure 5 In other embodiments, part of the constraint structure 30 is located in the fan-out area 60, and the orthographic projection of the constraint structure 30 on the array substrate 10 does not overlap with the orthographic projection of the wiring in the fan-out area 60 on the array substrate 10. In other words, the constraint structure 30 is set in the fan-out area 60, but the constraint structure 30 in the fan-out area 60 does not contact the wiring in the fan-out area 60.

[0063] like Figure 1 As shown, in some embodiments, the constraint structure 30 includes at least a first constraint layer 31 and a second constraint layer 32 sequentially stacked in a direction perpendicular to the array substrate 10. The constraint structure 30 is formed by stacking multiple film layers, for example, inorganic film layers and organic film layers, which can increase the stability of the constraint structure 30.

[0064] In some embodiments, the array substrate 10 includes a substrate 11 and a driving circuit layer 12 disposed on the substrate 11 . The driving circuit layer 12 includes a planarization layer, and the planarization layer is disposed on the same layer as the first constraining layer 31 .

[0065] The planarization layer can provide a flat surface, which is very important for subsequent lithography and other processing steps, because a flat surface can improve the accuracy and effect of these processes. The planarization layer can protect the underlying metal layer and other circuit components from mechanical damage, pollution and environmental influences such as moisture and chemical corrosion. The planarization layer is usually made of insulating material, which can effectively isolate the electrical signals between different metal layers, prevent signal interference and short circuit, and ensure the stability and reliability of the circuit.

[0066] In the embodiment of the present application, the first constraint layer 31 of the constraint structure 30 is arranged on the same layer as the planarization layer, that is, the first constraint layer 31 and the planarization layer are prepared by the same material and through the same process steps, which simplifies the process and improves the preparation efficiency of the display panel 100.

[0067] Preferably, in the direction pointing toward the array substrate 10 , the cross-sectional area of ​​the first constraining layer 31 gradually increases.

[0068] That is, the area of ​​the upper surface of the first constraining layer 31 is smaller than the area of ​​the lower surface of the first constraining layer 31, and the longitudinal section of the first constraining layer 31 is in the shape of a regular trapezoid, so that the first constraining layer 31 is more stable and the supporting effect on the polarizer 40 is more firm.

[0069] Preferably, the material of the first constraining layer 31 includes positive photoresist.

[0070] The first constrained layer 31 can be prepared by first coating a certain thickness of positive photoresist on the array substrate 10, then baking to form a positive photoresist layer, and using a mask to expose the positive photoresist layer. Since the positive photoresist layer has a certain thickness, there is a loss when the light beam passes through the positive photoresist layer, so the top surface of the positive photoresist layer receives more light source energy, and the bottom surface of the positive photoresist layer receives relatively less light source energy, thereby forming an inverted trapezoidal structure in the exposed area of ​​the positive photoresist layer. Then, the positive photoresist layer is developed, and the exposed area is removed, leaving a non-exposed area in a positive trapezoidal shape, thereby forming a positive trapezoidal first constrained layer 31 on the array substrate 10, that is, a structure that is narrow at the top and wide at the bottom.

[0071] In some embodiments, the display panel 100 further includes a pixel definition layer, the pixel definition layer is provided with a pixel opening, and the light emitting device layer 20 includes a plurality of light emitting units, and the light emitting units are located in the pixel opening.

[0072] A plurality of light-emitting units may be located in one pixel opening, or a plurality of light-emitting units may be arranged in a plurality of pixel openings in a one-to-one correspondence, so as to prevent crosstalk between adjacent pixels and improve display effects.

[0073] Preferably, the second constraining layer 32 is disposed at the same layer as the pixel definition layer.

[0074] The second constraining layer 32 of the constraining structure 30 is disposed on the same layer as the pixel definition layer, that is, the second constraining layer 32 and the pixel definition layer are made of the same material and through the same process steps, which simplifies the process and improves the manufacturing efficiency of the display panel 100.

[0075] Preferably, in the direction pointing toward the array substrate 10 , the cross-sectional area of ​​the second constraining layer 32 gradually increases.

[0076] That is, the area of ​​the upper surface of the second constraining layer 32 is smaller than the area of ​​the lower surface of the second constraining layer 32, and the longitudinal section of the second constraining layer 32 is in the shape of a regular trapezoid, so that the second constraining layer 32 is more stable and the supporting effect on the polarizer 40 is more firm.

[0077] Preferably, the material of the second confinement layer 32 includes positive photoresist.

[0078] The second constrained layer 32 can be prepared by first coating a certain thickness of positive photoresist on the first constrained layer 31, then baking to form a positive photoresist layer, and using a mask to expose the positive photoresist layer. Since the positive photoresist layer has a certain thickness, the light beam has a loss when passing through the positive photoresist layer, so the top surface of the positive photoresist layer receives more light source energy, and the bottom surface of the positive photoresist layer receives relatively less light source energy, thereby forming an inverted trapezoidal structure in the exposed area of ​​the positive photoresist layer. Then, the positive photoresist layer is developed, and the exposed area is removed, leaving a non-exposed area in the shape of a positive trapezoid, thereby forming a second constrained layer 32 in the shape of a positive trapezoid on the array substrate 10, that is, a structure that is narrow at the top and wide at the bottom.

[0079] In some embodiments, the display panel 100 further includes a supporting layer, which is disposed on a side of the light emitting device layer 20 facing away from the array substrate 10 .

[0080] The support layer provides mechanical strength and stability to the display panel 100 , ensuring that the panel will not be easily deformed or broken during manufacturing, transportation and use, thereby protecting sensitive electronic components inside.

[0081] Preferably, the constraint structure 30 further includes a third constraint layer 33 . The third constraint layer 33 is disposed on a side of the second constraint layer 32 away from the array substrate 10 . The third constraint layer 33 is disposed on the same layer as the support layer.

[0082] The third constraining layer 33 of the constraining structure 30 is disposed on the same layer as the supporting layer, that is, the third constraining layer 33 and the supporting layer are prepared by using the same material and the same process steps, which simplifies the process and improves the preparation efficiency of the display panel 100 .

[0083] Preferably, in the direction pointing toward the array substrate 10 , the cross-sectional area of ​​the third constraining layer 33 gradually increases.

[0084] That is, the area of ​​the upper surface of the third constraining layer 33 is smaller than the area of ​​the lower surface of the third constraining layer 33, and the longitudinal section of the third constraining layer 33 is a regular trapezoidal shape, so that the third constraining layer 33 is more stable and the supporting effect on the polarizer 40 is more firm.

[0085] Preferably, the material of the third constraining layer 33 includes positive photoresist.

[0086] The third constrained layer 33 can be prepared by first coating a certain thickness of positive photoresist on the second constrained layer 32, then baking to form a positive photoresist layer, and using a mask to expose the positive photoresist layer. Since the positive photoresist layer has a certain thickness, there is a loss when the light beam passes through the positive photoresist layer, so the top surface of the positive photoresist layer receives more light source energy, and the bottom surface of the positive photoresist layer receives relatively less light source energy, thereby forming an inverted trapezoidal structure in the exposed area of ​​the positive photoresist layer. Then, the positive photoresist layer is developed, and the exposed area is removed, leaving a non-exposed area in a positive trapezoidal shape, thereby forming a positive trapezoidal third constrained layer 33 on the array substrate 10, that is, a structure that is narrow at the top and wide at the bottom.

[0087] In some embodiments, the constraint structure 30 further includes a constraint glue 34 , and the constraint glue 34 is disposed on a side of the second constraint layer 32 away from the array substrate 10 .

[0088] The material of the restraining glue 34 can be PI (polyimide), PMMA (polymethyl methacrylate), PET (polyethylene terephthalate) or optical glue. Polarized flat lamination can be performed first, and then the restraining glue 34 is dispensed and cured to achieve the restraining effect.

[0089] Preferably, the material of the constraint structure 30 is optical glue. Since optical glue is generally set at the corresponding position of the display area AA, the constraint glue 34 of the constraint structure 30 and the optical glue of the display area AA are prepared simultaneously in the same process step, which can improve the preparation efficiency of the display panel 100.

[0090] In some embodiments, the cross-sectional area of ​​the constraining glue 34 gradually decreases along the direction pointing toward the array substrate 10 .

[0091] That is, the area of ​​the upper surface of the constraint glue 34 is larger than the area of ​​the lower surface of the constraint glue 34, and the longitudinal section of the third constraint layer 33 is in the shape of an inverted trapezoid, so that the contact area between the constraint glue 34 and the polarizer 40 becomes larger, and the constraint effect of the constraint glue 34 on the polarizer 40 is improved.

[0092] Preferably, the material of the constraining glue 34 includes negative photoresist.

[0093] The constrained glue 34 can be prepared by first coating a certain thickness of negative photoresist on the second constrained layer 32 or the third constrained layer 33, and then baking to form a negative photoresist layer, and using a mask to expose the negative photoresist layer. Since the negative photoresist layer has a certain thickness, the light beam has a loss when passing through the negative photoresist layer, so the top surface of the negative photoresist layer receives more light source energy, and the bottom surface of the negative photoresist layer receives relatively less light source energy, thereby forming an inverted trapezoidal structure in the exposure area of ​​the negative photoresist layer. Then, the negative photoresist layer is developed, the non-exposed area is removed, and the exposure area in the shape of an inverted trapezoid is left, thereby forming an inverted trapezoidal constrained glue 34, that is, a structure that is wide at the top and narrow at the bottom.

[0094] like Figure 6 As shown, in some embodiments, the polarizer 40 is provided with a through hole 41 for the constraint structure 30 to pass through, and the polarizer 40 is engaged with the constraint structure 30 through the through hole 41 .

[0095] The vias 41 on the polarizer 40 correspond one to one with the constraint structure 30. The upper surface of the constraint structure 30 exceeds the polarizer 40. Through the restriction of the vias 41, the polarizer 40 and the constraint glue 34 are firmly clamped together, further improving the constraint effect of the constraint structure 30 on the polarizer 40.

[0096] If the uppermost end of the restraining structure 30 is an inverted trapezoidal restraining glue 34 , the inverted trapezoidal structure can further prevent the polarizer 40 from escaping from the via hole 41 .

[0097] like Figure 1 As shown, in some embodiments, the display panel 100 further includes an encapsulation layer 70 , and the encapsulation layer 70 is disposed between the light emitting device layer 20 and the polarizer 40 .

[0098] The encapsulation layer 70 may include a first inorganic layer, an organic layer, and a second inorganic layer sequentially arranged in a direction away from the array substrate 10 , and the dam 50 is used to block the organic layer.

[0099] The first inorganic layer and the second inorganic layer can be made of materials such as silicon oxide, silicon nitride or silicon oxynitride, which can provide good mechanical support and packaging protection to prevent the display panel 100 from being affected by the environment. At the same time, the first inorganic layer and the second inorganic layer can also effectively isolate external harmful substances such as moisture and oxygen from entering the interior of the display panel 100, thereby improving the service life and stability of the display panel 100.

[0100] The organic layer is disposed on the side of the first inorganic layer away from the substrate, and can further prevent external moisture, oxygen, etc. from entering the interior of the display panel 100.

[0101] Optionally, the organic layer can be made of organic materials such as polymers. The thickness of the organic layer is greater than the first inorganic layer and the second inorganic layer, and it is more flexible. Therefore, it can better adapt to the bending and curvature of the display panel 100. The organic material can also play a role in buffering external forces.

[0102] Preferably, the constraint structure 30 includes a packaging extension layer 35 , and the packaging extension layer 35 is disposed on the same layer as the packaging layer 70 .

[0103] The encapsulation extension layer 35 may be disposed only on the same layer as the first inorganic layer and / or the second inorganic layer, or may be disposed on the same layer as the entire encapsulation layer 70 .

[0104] The encapsulation extension layer 35 of the constraint structure 30 is disposed on the same layer as the encapsulation layer 70 , that is, the encapsulation extension layer 35 and the encapsulation layer 70 are made of the same material and through the same process steps, which simplifies the process and improves the production efficiency of the display panel 100 .

[0105] In a second aspect, the present application also provides a display device, including the display panel 100 of any of the above embodiments. Since the display device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0106] The display device may be any device with a display function, for example, a mobile phone, a tablet computer, a laptop computer, a PDA, an in-vehicle electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA), etc. It may also be a non-mobile device such as a personal computer (PC), a television (TV), a teller machine, or an automated machine.

[0107] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A display panel, characterized in that: The display panel includes a display area and a non-display area arranged around the display area, and the display panel also includes: An array substrate; A light emitting device layer is disposed on the array substrate and is located in the display area; A constraint structure, disposed on the array substrate and located in the non-display area; A polarizer is arranged on a side of the light-emitting device layer away from the array substrate, the orthographic projection of the polarizer on the array substrate at least partially overlaps the orthographic projection of the constraint structure on the array substrate, and the polarizer is connected to the constraint structure.

2. The display panel according to claim 1, characterized in that: The display panel further comprises a dam, wherein the dam is disposed between the display area and the restraining structure; Preferably, there are multiple constraint structures, and the multiple constraint structures are arranged at intervals along the periphery of the display area; Preferably, the plurality of constraint structures are symmetrically arranged along a geometric center point of the display area.

3. The display panel according to claim 1, characterized in that: The non-display area includes a fan-out area for the wiring of the driving chip to pass through, and the orthographic projection of the fan-out area on the array substrate does not overlap with the orthographic projection of the constraint structure on the array substrate; Alternatively, part of the constraint structure is located in the fan-out area, and the orthographic projection of the constraint structure on the array substrate does not overlap with the orthographic projection of the wiring in the fan-out area on the array substrate.

4. The display panel according to claim 1, characterized in that: The constraint structure at least comprises a first constraint layer and a second constraint layer sequentially stacked in a direction perpendicular to the array substrate; Preferably, the array substrate comprises a substrate and a driving circuit layer arranged on the substrate, the driving circuit layer comprises a planarization layer, and the planarization layer is arranged on the same layer as the first constraining layer; Preferably, in a direction pointing toward the array substrate, a cross-sectional area of ​​the first constraining layer gradually increases; Preferably, the material of the first constraining layer includes positive photoresist.

5. The display panel according to claim 4, characterized in that: The display panel further comprises a pixel definition layer, wherein the pixel definition layer is provided with a pixel opening, and the light emitting device layer comprises a plurality of light emitting units, wherein the light emitting units are located in the pixel opening; Preferably, the second constraint layer is disposed on the same layer as the pixel definition layer; Preferably, in a direction pointing toward the array substrate, a cross-sectional area of ​​the second constraining layer gradually increases; Preferably, the material of the second constraining layer includes positive photoresist.

6. The display panel according to claim 4, characterized in that: The display panel further comprises a supporting layer, wherein the supporting layer is arranged on a side of the light emitting device layer away from the array substrate; Preferably, the constraint structure further comprises a third constraint layer, the third constraint layer is arranged on a side of the second constraint layer away from the array substrate, and the third constraint layer is arranged on the same layer as the support layer; Preferably, in a direction pointing toward the array substrate, a cross-sectional area of ​​the third constraining layer gradually increases; Preferably, the material of the third constraining layer includes positive photoresist.

7. The display panel according to claim 4, characterized in that: The constraint structure further includes a constraint glue, and the constraint glue is arranged on a side of the second constraint layer away from the array substrate; Preferably, in a direction pointing toward the array substrate, the cross-sectional area of ​​the constraining glue gradually decreases; Preferably, the material of the constraining glue includes negative photoresist.

8. The display panel according to claim 1, characterized in that: The polarizer is provided with a through hole for the constraint structure to pass through, and the polarizer is clamped with the constraint structure through the through hole.

9. The display panel according to claim 1, characterized in that: The display panel further comprises an encapsulation layer, wherein the encapsulation layer is disposed between the light emitting device layer and the polarizer; Preferably, the constraint structure comprises a packaging extension layer, and the packaging extension layer is arranged at the same layer as the packaging layer.

10. A display device, characterized in that: Comprising the display panel according to any one of claims 1-9.

Images