Display panel, preparation method of display panel and display equipment

Abstract

The invention provides a display panel, a preparation method of the display panel and display equipment. The display panel comprises a substrate, a light-emitting layer, a polaroid, a touch layer and a barrier layer, and the light-emitting layer is arranged on one side of the substrate; the touch layer is arranged on the side, away from the substrate, of the light-emitting layer; the polaroid is arranged on the side, away from the light-emitting layer, of the touch layer, and the polaroid comprises a polarizing layer adsorbed with iodide ions; the barrier layer is arranged between the polarizing layer and the touch layer, and the barrier layer is made of a wide-band-gap semiconductor material. By adding the barrier layer, iodide ions of the polarization layer can be prevented from permeating into the touch control layer, corroding the metal wires and influencing the reliability of the touch control layer, and the barrier layer is made of the wide-band-gap semiconductor material, has higher visible light transmittance, is more stable in chemical property, and can be applied to the touch control panel. The display performance and reliability of the display panel can be improved.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of display technology, and in particular, to a display panel, a method for preparing a display panel, and a display device. Background Art

[0002] With the development of display technology, the application scope of display screens has become wider. Among them, OLED screens have the characteristics of self-luminousness and a thinner structure. They can be applied to a variety of scenarios and can provide display support for more advanced technologies.

[0003] In the prior art, a display screen can usually realize a human-computer interaction function, which is realized by a touch layer provided in the display screen. However, the reliability of the touch layer in the display screen is not stable. Summary of the invention

[0004] In order to solve the above problems, embodiments of the present application provide a display panel, a method for manufacturing a display panel, and a display device to at least partially solve the above problems.

[0005] An embodiment of the first aspect of the embodiments of the present application provides a display panel, including a substrate, a light-emitting layer, a polarizer, a touch layer and a blocking layer, wherein the light-emitting layer is arranged on one side of the substrate; the touch layer is arranged on the side of the light-emitting layer away from the substrate; the polarizer is arranged on the side of the touch layer away from the light-emitting layer, the polarizer includes a polarizing layer adsorbed with iodine ions; the blocking layer is arranged between the polarizing layer and the touch layer, and the blocking layer is made of a wide-bandgap semiconductor material.

[0006] In an alternative implementation, the barrier layer is indium tin oxide.

[0007] In an optional implementation, the touch layer includes a touch metal wiring layer, the polarizer also includes a polarization compensation film layer, the polarization compensation film layer is arranged on a side of the polarization layer close to the touch layer, and the blocking layer is arranged between the polarization compensation film layer and the touch metal wiring layer.

[0008] In an optional implementation, the polarizer further includes a supporting film layer, and the supporting film layer is disposed between the polarizing layer and the polarizing compensation film layer.

[0009] In an optional implementation, the polarizer further includes a pressure-sensitive adhesive layer, which is disposed on a side of the polarizing compensation film layer close to the touch layer, and the barrier layer is disposed between the pressure-sensitive adhesive layer and the touch metal wiring layer.

[0010] In an optional implementation, the touch layer further includes a cured film protective layer, and the cured film protective layer is disposed on a side of the touch metal wiring layer close to the polarizer.

[0011] In an optional implementation, the barrier layer is disposed between the pressure-sensitive adhesive layer and the curing film protective layer.

[0012] In an optional implementation, the barrier layer includes a first barrier layer and a second barrier layer, the first barrier layer is arranged between the pressure-sensitive adhesive layer and the cured film protection layer, and the second barrier layer is arranged on a side of the polarizing layer away from the touch layer.

[0013] According to an embodiment of the second aspect of the embodiments of the present application, a method for preparing a display panel is also provided, including: providing a substrate, forming a light-emitting layer on one side of the substrate; forming a touch layer on a side of the light-emitting layer away from the substrate; forming a polarizer on a side of the touch layer away from the light-emitting layer, the polarizer including a polarizing layer adsorbed with iodine ions; and arranging a blocking layer between the polarizing layer and the touch layer, the blocking layer being made of a wide bandgap semiconductor material.

[0014] According to a third aspect of the embodiments of the present application, a display device is also provided, comprising the display panel as described in the first aspect.

[0015] According to the embodiments of the present application, a display panel, a method for preparing a display panel and a display device are provided. Among them, the display panel includes a substrate, a light-emitting layer, a polarizer, a touch layer and a barrier layer, the light-emitting layer is arranged on one side of the substrate; the touch layer is arranged on the side of the light-emitting layer away from the substrate; the polarizer is arranged on the side of the touch layer away from the light-emitting layer, and the polarizer includes a polarizing layer adsorbed with iodine ions; the barrier layer is arranged between the polarizing layer and the touch layer, and the barrier layer is made of a wide bandgap semiconductor material. The embodiment of the present application adds a barrier layer between the polarizing layer and the touch layer, thereby preventing the iodine ions of the polarizing layer from penetrating into the touch layer, causing corrosion to the metal wiring in the touch layer and affecting the reliability of the touch layer. The barrier layer is made of a wide bandgap semiconductor material, has a higher visible light transmittance, and has more stable chemical properties. It is not easy to react with chemical substances in other film layers, which can improve the display performance and reliability of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following drawings are intended only to illustrate and explain the present application, and do not limit the scope of the present application.

[0017] Figure 1 is a schematic structural diagram of a display panel of an exemplary embodiment of the present application;

[0018] Figure 2 is a schematic structural diagram of a display panel according to another exemplary embodiment of the present application;

[0019] Figure 3 is a schematic structural diagram of a display panel according to another exemplary embodiment of the present application;

[0020] Figure 4 is a schematic structural diagram of a display panel according to another exemplary embodiment of the present application;

[0021] Figure 5is a schematic structural diagram of a display panel according to another exemplary embodiment of the present application;

[0022] Figure 6 is a schematic structural diagram of a display panel according to another exemplary embodiment of the present application;

[0023] Figure 7 is a schematic structural diagram of a display panel according to another exemplary embodiment of the present application;

[0024] Figure 8 is a schematic structural diagram of a display panel according to another exemplary embodiment of the present application;

[0025] Fig. 9 is a flowchart of a method for preparing a display panel according to an exemplary embodiment of the present application;

[0026] Description of reference numerals:

[0027] 1. Display panel; 11. Substrate; 12. Light-emitting layer; 13. Touch layer; 14. Polarizer; 15. Barrier layer; 16. Encapsulation layer; 17. Optical adhesive layer; 18. Cover plate;

[0028] 131, touch metal wiring layer; 1311, first touch metal wiring layer; 1312, second touch metal wiring layer; 132, cured film protection layer; 133, insulation layer;

[0029] 141, polarizing layer; 142, polarizing compensation film layer; 143, supporting film layer; 144, pressure-sensitive adhesive layer;

[0030] 151. A first barrier layer; 152. A second barrier layer. DETAILED DESCRIPTION

[0031] In order to have a clearer understanding of the technical features, purposes and effects of the embodiments of the present application, the specific implementation methods of the embodiments of the present application are now described with reference to the accompanying drawings.

[0032] In this document, “exemplary” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “exemplary” should not be interpreted as a more preferred or more advantageous technical solution.

[0033] In order to simplify the drawings, only the parts related to the present application are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one or more of the parts with the same structure or function are schematically drawn or only one or more of them are marked.

[0034] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0035] Reference Figure 1 As shown, an embodiment of the present application provides a display panel 1 including a substrate 11 , a light emitting layer 12 , a polarizer 14 , a touch layer 13 and a barrier layer 15 .

[0036] Among them, the light-emitting layer 12 is arranged on one side of the substrate 11; the touch layer 13 is arranged on the side of the light-emitting layer 12 away from the substrate 11; the polarizer 14 is arranged on the side of the touch layer 13 away from the light-emitting layer 12, and the polarizer 14 includes a polarizing layer 141 adsorbed with iodine ions; the blocking layer 15 is arranged between the polarizing layer 141 and the touch layer 13, and the blocking layer 15 is made of a wide-bandgap semiconductor material.

[0037] Exemplarily, the display panel 1 may be an organic light emitting display (OLED), in which a substrate 11, a light emitting layer 12, a polarizer 14, a touch layer 13 and a barrier layer 15 are stacked in sequence.

[0038] The substrate 11 may be a flexible substrate, which can have good bending performance, so as to realize the bendability of the display panel 1 .

[0039] The light-emitting layer 12 is arranged on one side of the substrate 11. The light-emitting layer 12 can be an organic light-emitting layer 12 (i.e., an OLED layer). The light-emitting layer 12 can include a plurality of organic light-emitting elements. The organic light-emitting elements are electrically connected to each other. Light is emitted by each organic light-emitting element to light up the display panel 1.

[0040] The touch layer 13 is arranged on the side of the light emitting layer 12 away from the substrate 11. The touch layer 13, i.e., the TP layer, is used to realize the human-computer interaction function of the display panel 1. The touch layer 13 needs to ensure good conductive stability to realize the touch function of the display panel 1. However, Al in the touch layer 13 is easy to react with iodine ions, thereby causing corrosion of the touch layer, which in turn causes the capacitance value of the touch layer 13 to be low, resulting in unqualified quality of the display panel 1.

[0041] The polarizer 14 is arranged on the side of the touch layer 13 away from the light-emitting layer 12, and the polarizer 14 includes a polarizing layer 141 adsorbed with iodine ions. The polarizer 14 (Polarizer, POL) is used to reduce the reflection of external light and improve the contrast of the display panel 1. Iodine has a dichroic property, can selectively absorb light, can be adsorbed on polyvinyl alcohol, and has good optical properties. Therefore, the polarizing layer 141 adsorbed with iodine ions can be a PVA (Polyvinyl Alcohol, polyvinyl alcohol) layer. The PVA layer has good optical transparency, good affinity with inorganic dyes such as iodine, and has good tensile strength and elongation. The principle of polarizing layer 141 forming polarized light is as follows: iodine (dichroic substance) enters the molecular tunnel formed between PVA molecules. After stretching, the dichroic substance is regularly arranged, absorbs light in the absorption axis direction (i.e., the stretching direction), and transmits light perpendicular to the absorption axis to form polarized light.

[0042] In an environment of high temperature, high humidity and high pressure, cracks will occur inside the polarizer 14. Iodine ions adsorbed on the polarizing layer 141 will penetrate into the touch layer 13 through the cracks, chemically react with the touch metal in the touch layer 13, and corrode the metal wiring, affecting the reliability of the touch layer 13.

[0043] The barrier layer 15 is arranged between the polarizing layer 141 and the touch layer 13, and the barrier layer 15 is made of a wide bandgap semiconductor material. The barrier layer 15 can be formed by thin film deposition. The barrier layer 15 can block the iodine ions of the polarizing layer 141 from penetrating into the touch layer 13 to avoid corrosion of the metal wiring. The band gap refers to the energy difference between the valence band and the conduction band in a solid, and is an important parameter of a semiconductor material. The smaller the band gap, the better the conductivity of the semiconductor material, and the easier it is for electrons to transition from the valence band to the conduction band. Generally, the band gap of semiconductor materials ranges from 1 electron volt (eV) to 3 electron volts (eV). A wide bandgap semiconductor material refers to a semiconductor material with a band gap greater than 2.0 eV at room temperature, such as indium tin oxide. A wide bandgap semiconductor material has a higher visible light transmittance, and is more chemically stable. It is not easy to react with chemical substances in other film layers, and can improve the display performance and reliability of the display panel 1.

[0044] Reference Figure 2 The display panel 1 may further include an optical adhesive layer 17 (OCA layer) and a cover plate 18. The cover plate 18 is disposed on a side of the polarizer 14 away from the substrate 11. The optical adhesive layer 17 is a special double-sided adhesive with optical transparency. The polarizer 14 and the cover plate 18 are bonded together by the optical adhesive layer 17. The cover plate 18 may be a glass cover plate or a flexible cover plate.

[0045] The display panel 1 may further include an encapsulation layer 16 disposed between the touch layer 13 and the light-emitting layer 12 . The encapsulation layer 16 is used to protect the organic light-emitting elements in the light-emitting layer 12 from external moisture and oxygen to ensure the light-emitting reliability of the organic light-emitting elements.

[0046] In the embodiment of the present application, a barrier layer 15 is added between the polarizing layer 141 and the touch layer 13, so as to prevent iodine ions of the polarizing layer 141 from penetrating into the touch metal wiring layer 131 and causing corrosion to the metal wiring, thereby affecting the reliability of the touch layer 13. In addition, the barrier layer 15 is made of a wide bandgap semiconductor material, has a higher visible light transmittance, and has more stable chemical properties and is not easy to react with chemical substances in other film layers, thereby improving the display performance and reliability of the display panel 1.

[0047] In an optional implementation, the barrier layer 15 is indium tin oxide. Exemplarily, the barrier layer 15 can be an indium tin oxide layer (i.e., an ITO layer), and the indium tin oxide layer is in the form of a thin film. The characteristics of indium tin oxide are a combination of its electrical conductivity and optical transparency, and it can be deposited on the surface of the polarizer 14 by electron beam evaporation, physical vapor deposition, or sputtering deposition. In addition, the chemical properties of indium tin oxide are stable and do not react with water, thereby avoiding other side reactions of the barrier layer 15. In addition, by utilizing the conductive properties of indium tin oxide, it is possible to prevent static electricity generated externally from having an adverse effect on the circuit inside the display panel 1.

[0048] In an optional implementation, the touch layer 13 includes a touch metal wiring layer 131, and the polarizer 14 also includes a polarization compensation film layer 142, the polarization compensation film layer 142 is arranged on a side of the polarization layer 141 close to the touch layer 13, and the blocking layer 15 is arranged between the polarization compensation film layer 142 and the touch metal wiring layer 131.

[0049] For example, refer to Figure 7 The touch layer 13 may include a plurality of touch metal wiring layers 131, for example, a first touch metal wiring layer TP-M1 and a second touch metal wiring layer TP-M2. The touch metal wiring layer 131 may be made of aluminum Al or other metal alloys, which is not limited in this embodiment. Figure 3, the polarization compensation film layer 142 (ND Film) can realize the conversion of linear polarized light to circular polarized light. Linear polarized light refers to light that contains only one vibration during the propagation process, and its vibration direction always remains in the same plane of the polarization of the light. Circularly polarized light is a special elliptically polarized light, and its electric vector endpoints describe a circular trajectory, and the polarization direction changes with time. The polarization layer 141 is further compensated for polarization light by the polarization compensation film layer 142 to enhance the polarization effect of the polarizer 14. The blocking layer 15 is arranged between the polarization compensation film layer 142 and the touch metal wiring layer 131 to avoid affecting the effect of the polarization layer 141 and the polarization compensation film layer 142 to form polarized light.

[0050] In an optional implementation, the polarizer 14 further includes a supporting film layer 143 , and the supporting film layer 143 is disposed between the polarizing layer 141 and the polarizing compensation film layer 142 .

[0051] For example, refer to Figure 4 The supporting film layer 143 may be a TAC (Triacetyl Cellulose) layer, which has good optical properties, moisture permeability, thermoplasticity and mechanical properties. The supporting film layer 143 is disposed between the polarizing layer 141 and the polarizing compensation film layer 142, and can support the polarizing layer 141, and can improve the tolerance of the polarizing layer 141, prevent the polarizing layer 141 from shrinking, and improve the overall mechanical properties of the polarizer 14. Furthermore, a hardened coating may be formed on the surface of the supporting film layer 143 to improve the scratch resistance of the surface of the supporting film layer 143.

[0052] In an optional implementation, the polarizer 14 further includes a pressure-sensitive adhesive layer 144 , which is disposed on a side of the polarization compensation film layer 142 close to the touch layer 13 , and the barrier layer 15 is disposed between the pressure-sensitive adhesive layer 144 and the touch metal wiring layer 131 .

[0053] For example, refer to Figure 5 The pressure-sensitive adhesive layer 144 is a film layer formed by using an adhesive pressure-sensitive adhesive. The pressure-sensitive adhesive is a type of adhesive that is sensitive to pressure and has good optical properties, bonding properties, temperature resistance, corrosion resistance, and oxidation resistance. The polarization compensation film layer 142 and the touch layer 13 can be bonded together by the pressure-sensitive adhesive layer 144 to achieve bonding between the polarizer 14 and the touch layer 13. The barrier layer 15 can be disposed between the pressure-sensitive adhesive layer 144 and the touch metal wiring layer 131. By disposing the pressure-sensitive adhesive layer 144, the polarization compensation film layer 142 can be protected to avoid chemical reactions between the barrier layer 15 and the polarization compensation film layer 142, thereby avoiding affecting the effect of the polarizer 14 in forming polarized light.

[0054] In an optional implementation, the touch layer 13 further includes a cured film protective layer 132 , and the cured film protective layer 132 is disposed on a side of the touch metal wiring layer 131 close to the polarizer 14 .

[0055] For example, refer to Figure 6 The cured film protective layer 132 (TP-OC layer) covers the surface of the touch metal wiring layer 131, and has the function of protecting the touch metal wiring layer 131. Since the touch metal wiring layer 131 includes a large number of metal wirings, its chemical stability is poor, and it is easy to react chemically with water, oxygen, etc., and is easily affected by the chemical substances of other film layers of the display panel 1. Therefore, by providing the cured film protective layer 132, the reliability of the touch metal wiring layer 131 can be improved. In addition, the cured film protective layer 132 can also play a role in flattening the surface of the touch metal wiring layer 131.

[0056] Optionally, refer to Figure 7 The touch layer 13 also includes an insulating layer 133. The touch metal wiring layer 131 includes a first touch metal wiring layer 1311 and a second touch metal wiring layer 1312. The second touch metal wiring layer 1312 is arranged on a side of the first touch metal wiring layer 1311 away from the polarizer 14. The insulating layer 133 is arranged between the first touch metal wiring layer 1311 and the second touch metal wiring layer 1312. The insulating layer 133 is used to prevent the metal wiring between the first touch metal wiring layer 1311 and the second touch metal wiring layer 1312 from short circuiting. In addition, the capacitance of the first touch metal wiring layer 1311 and the second touch metal wiring layer 1312 can be adjusted by controlling the film thickness of the insulating layer 133.

[0057] Furthermore, the cured film protective layer 132 may include a first cured film protective layer 132 and a second cured film protective layer 132. The first cured film protective layer 132 is arranged on a side of the first touch metal wiring layer 1311 close to the polarizer 14, and the second cured film protective layer 132 is arranged on a side of the second touch metal wiring layer 1312 close to the substrate 11. The second cured film protective layer 132 can protect the second touch metal wiring layer 1312 and improve the stability of the second touch metal wiring layer 1312.

[0058] In an optional implementation, the barrier layer 15 is disposed between the pressure-sensitive adhesive layer 144 and the cured film protective layer 132. Figure 7 The barrier layer 15 can be disposed between the pressure-sensitive adhesive layer 144 and the cured film protection layer 132 to prevent the barrier layer 15 from directly contacting the touch metal wiring layer 131 , thereby further improving the reliability of the touch metal wiring layer 131 .

[0059] In an optional implementation, the barrier layer 15 includes a first barrier layer 151 and a second barrier layer 152 , wherein the first barrier layer 151 is disposed between the pressure-sensitive adhesive layer 144 and the cured film protective layer 132 , and the second barrier layer 152 is disposed on a side of the polarizing layer 141 away from the touch layer 13 .

[0060] For example, refer to Figure 8 The barrier layer 15 may include a first barrier layer 151 and a second barrier layer 152, wherein the first barrier layer 151 may be disposed between the pressure-sensitive adhesive layer 144 and the cured film protective layer 132 to prevent the iodine ions in the polarizing layer 141 from penetrating into the touch metal wiring layer 131, causing corrosion of the touch metal wiring layer 131 and affecting the reliability of the display panel 1; the second barrier layer 152 may be disposed on a side of the polarizing layer 141 away from the touch layer 13, for example, may be disposed between the polarizing layer 141 and the optical adhesive layer 17, thereby relying on the chemical properties of indium tin oxide being stable and not reacting with water to protect the polarizing layer 141 and improve the stability of the polarizer 14.

[0061] Reference Fig. 9 As shown, according to the second aspect of the embodiment of the present application, a method for preparing a display panel is also provided. The method of this embodiment specifically includes the following steps:

[0062] S901, providing a substrate, and forming a light-emitting layer on one side of the substrate.

[0063] The substrate provided in this embodiment may be a flexible substrate, which has good bending performance and can realize the bendability of the display panel. The light-emitting layer may be an organic light-emitting layer, which may include a plurality of organic light-emitting elements, each of which is electrically connected, and each organic light-emitting element emits light to realize lighting of the display panel.

[0064] S902 , forming a touch layer on a side of the light-emitting layer away from the substrate.

[0065] The touch layer is used to realize the human-computer interaction function of the display panel. The touch layer can be made of aluminum Al or other metal alloys, which is not limited in this embodiment. The touch layer needs to ensure good conductive stability to realize the touch function of the display panel.

[0066] S903 , forming a polarizer on a side of the touch layer away from the light-emitting layer.

[0067] The polarizer includes a polarizing layer adsorbed with iodine ions, and the polarizer is used to reduce the reflection of external light and improve the contrast of the display panel 1. Iodine has a dichroic property, can selectively absorb light, can be adsorbed on polyvinyl alcohol, and has good optical properties. Therefore, the polarizing layer adsorbed with iodine ions can be a PVA layer, and the PVA layer has good optical transparency, good affinity with inorganic dyes such as iodine, and good tensile strength and elongation.

[0068] S904: Dispose a barrier layer between the polarizing layer and the touch layer.

[0069] Among them, the barrier layer is made of a wide bandgap semiconductor material. The bandgap refers to the energy difference between the valence band and the conduction band in a solid, and is an important parameter of a semiconductor material. The smaller the bandgap, the better the conductivity of the semiconductor material, and the easier it is for electrons to jump from the valence band to the conduction band. Usually, the bandgap of semiconductor materials ranges from 1 electron volt (eV) to 3 electron volts (eV). A wide bandgap semiconductor material refers to a semiconductor material with a bandgap greater than 2.0 eV at room temperature, such as indium tin oxide. Wide bandgap semiconductor materials have higher visible light transmittance, more stable chemical properties, and are not easy to react with chemical substances in other film layers, which can improve the display performance and reliability of the display panel.

[0070] In the embodiment of the present application, a barrier layer is added between the polarizing layer and the touch layer, so as to prevent the iodine ions of the polarizing layer from penetrating into the touch layer and causing corrosion to the metal wiring, thereby affecting the reliability of the touch layer. The barrier layer is made of a wide bandgap semiconductor material, has a higher visible light transmittance, and has more stable chemical properties and is not easy to react with the chemical substances in other film layers, thereby improving the display performance and reliability of the display panel.

[0071] In an alternative implementation, the barrier layer is indium tin oxide.

[0072] Specifically, the indium tin oxide layer can be in the form of a thin film. Indium tin oxide has the characteristics of electrical conductivity and optical transparency, and can be deposited on the surface of the polarizer by electron beam evaporation, physical vapor deposition, or sputtering deposition. Indium tin oxide has stable chemical properties and does not react with water, thereby avoiding other side reactions of the barrier layer. In addition, the conductive properties of indium tin oxide can prevent static electricity generated externally from having adverse effects on the circuit inside the display panel.

[0073] In an optional implementation, the touch layer includes a touch metal wiring layer, the polarizer also includes a polarization compensation film layer, and a blocking layer is arranged between the polarization layer and the touch metal wiring layer, including: forming a polarization compensation film layer on a side of the polarization layer close to the touch layer; forming a blocking layer between the polarization compensation film layer and the touch metal wiring layer.

[0074] Specifically, the polarization compensation film layer can realize the conversion of linear polarized light to circular polarized light. Linear polarized light refers to light that contains only one vibration during the propagation process, and its vibration direction always remains in the same plane of light polarization. Circularly polarized light is a special type of elliptically polarized light, whose electric vector endpoints describe a circular trajectory, and the polarization direction changes over time. The polarization layer is further compensated for polarization light through the polarization compensation film layer to enhance the polarization effect of the polarizer.

[0075] In this implementation, a polarization compensation film layer is formed on the side of the polarization layer close to the touch layer, and a blocking layer is formed between the polarization compensation film layer and the touch metal wiring layer, so that the blocking layer can avoid affecting the effect of the polarization layer and the polarization compensation film layer on forming polarized light.

[0076] In an optional implementation, the polarizer further includes a supporting film layer, and the method for preparing the display panel of this embodiment further includes: forming a supporting film layer between the polarizing layer and the polarizing compensation film layer.

[0077] Specifically, the support film layer can be made of triacetyl cellulose, which has good optical properties, moisture permeability, thermoplasticity and mechanical properties. In this implementation, by forming a support film layer between the polarizing layer and the polarizing compensation film layer, the support film layer can be used to support the polarizing layer, and the support film layer can improve the tolerance of the polarizing layer, prevent the polarizing layer from shrinking, and improve the overall mechanical properties of the polarizer.

[0078] In an optional implementation, the polarizer also includes a pressure-sensitive adhesive layer, and a barrier layer is formed between the polarization compensation film layer and the touch metal wiring layer, including: forming a pressure-sensitive adhesive layer on a side of the polarization compensation film layer close to the touch layer; forming a barrier layer between the pressure-sensitive adhesive layer and the touch metal wiring layer.

[0079] Specifically, pressure-sensitive adhesive is a type of adhesive that is sensitive to pressure and has good optical properties, bonding performance, temperature resistance, corrosion resistance and oxidation resistance. The polarizing compensation film layer and the touch layer can be bonded through the pressure-sensitive adhesive layer to achieve bonding between the polarizer and the touch layer.

[0080] In this implementation, a pressure-sensitive adhesive layer is formed on the side of the polarizing compensation film layer close to the touch layer. The pressure-sensitive adhesive layer can protect the polarizing compensation film layer to avoid chemical reaction between the blocking layer and the polarizing compensation film layer, thereby avoiding affecting the effect of the polarizer in forming polarized light.

[0081] In an optional implementation, the touch layer further includes a cured film protective layer, and the method for preparing the display panel of this embodiment further includes: forming a cured film protective layer on a side of the touch metal wiring layer close to the polarizer.

[0082] Specifically, the cured film protective layer covers the surface of the touch metal wiring layer, and has the function of protecting the touch metal wiring layer. Since the touch metal wiring layer includes a large number of metal wirings, its chemical stability is poor, and it is easy to react chemically with water, oxygen, etc., and it is easy to be affected by the chemical substances of other film layers of the display panel. Therefore, in this implementation, by forming a cured film protective layer on the side of the touch metal wiring layer close to the polarizer, the reliability of the touch metal wiring layer can be improved by using the cured film protective layer. In addition, the cured film protective layer can also play a role in flattening the surface of the touch metal wiring layer.

[0083] In an optional implementation, forming a barrier layer between the pressure-sensitive adhesive layer and the touch metal wiring layer includes: forming a barrier layer between the pressure-sensitive adhesive layer and the cured film protective layer.

[0084] Specifically, by forming a barrier layer between the pressure-sensitive adhesive layer and the cured film protective layer, the barrier layer is prevented from directly contacting the touch metal wiring layer, thereby preventing adverse effects on the metal wiring of the touch metal wiring layer, thereby further improving the reliability of the touch metal wiring layer.

[0085] In an optional implementation, the barrier layer includes a first barrier layer and a second barrier layer. The method for preparing the display panel of this embodiment also includes: forming a first barrier layer between the pressure-sensitive adhesive layer and the cured film protective layer; and forming a second barrier layer on a side of the polarizing layer away from the touch layer.

[0086] Specifically, a first barrier layer is formed between the pressure-sensitive adhesive layer and the cured film protective layer, which can prevent iodine ions in the polarizing layer from penetrating into the touch metal wiring layer, causing corrosion of the touch metal wiring layer and affecting the reliability of the display panel; a second barrier layer is formed on the side of the polarizing layer away from the touch layer, for example, it can be arranged between the polarizing layer and the optical adhesive layer, and can rely on the stable chemical properties of indium tin oxide and the property that it does not react with water to protect the polarizing layer, thereby improving the stability of the polarizer.

[0087] According to a third aspect of the embodiments of the present application, a display device is also provided. In one embodiment of the present application, the display device includes the display panel provided by any embodiment of the present application.

[0088] The specific structure of the display panel has been described in detail in the above embodiment and will not be repeated here. The display device may include any electronic device with a display function, such as a mobile phone, a tablet, a laptop, a desktop computer, a television, a smart watch, etc. In addition, the display device may be a curved display device or a foldable display device, which is not limited in this embodiment.

[0089] In an embodiment of the present application, a blocking layer is added to the display panel in the display device, and the blocking layer is arranged between the polarizing layer and the touch layer, so as to prevent iodine ions of the polarizing layer from penetrating into the touch layer and causing corrosion to the metal wiring, thereby affecting the reliability of the touch layer. In addition, the blocking layer is made of a wide bandgap semiconductor material, has a higher visible light transmittance, and has more stable chemical properties and is not easy to react with chemical substances in other film layers, thereby improving the display performance and reliability of the display panel.

[0090] It should be noted that, 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 application. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0091] It should be noted that although the specific embodiments of the present application are described in detail in conjunction with the accompanying drawings, this should not be construed as limiting the scope of protection of the present application. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of the present application.

[0092] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0093] The examples of the embodiments of the present application are intended to concisely illustrate the technical features of the embodiments of the present application so that those skilled in the art can intuitively understand the technical features of the embodiments of the present application, and are not intended to be improper limitations of the embodiments of the present application.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized in that: It includes a substrate, a light-emitting layer, a polarizer, a touch layer and a barrier layer. The light-emitting layer is disposed on one side of the substrate; The touch control layer is arranged on a side of the light emitting layer away from the substrate; The polarizer is arranged on a side of the touch layer away from the light-emitting layer, and the polarizer comprises a polarizing layer adsorbed with iodine ions; The blocking layer is arranged between the polarizing layer and the touch control layer, and the blocking layer is made of a wide bandgap semiconductor material.

2. The display panel according to claim 1, characterized in that: The barrier layer is indium tin oxide.

3. The display panel according to claim 1 or 2, characterized in that: The touch layer includes a touch metal wiring layer, the polarizer also includes a polarization compensation film layer, the polarization compensation film layer is arranged on a side of the polarization layer close to the touch layer, and the barrier layer is arranged between the polarization compensation film layer and the touch metal wiring layer.

4. The display panel according to claim 3, characterized in that: The polarizer further includes a supporting film layer, and the supporting film layer is arranged between the polarizing layer and the polarizing compensation film layer.

5. The display panel according to claim 4, characterized in that: The polarizer further includes a pressure-sensitive adhesive layer, which is arranged on a side of the polarizing compensation film layer close to the touch layer, and the barrier layer is arranged between the pressure-sensitive adhesive layer and the touch metal wiring layer.

6. The display panel according to claim 5, characterized in that: The touch control layer further includes a cured film protective layer, and the cured film protective layer is arranged on a side of the touch control metal wiring layer close to the polarizer.

7. The display panel according to claim 6, characterized in that: The barrier layer is arranged between the pressure-sensitive adhesive layer and the curing film protective layer.

8. The display panel according to claim 6, characterized in that: The barrier layer includes a first barrier layer and a second barrier layer, the first barrier layer is arranged between the pressure-sensitive adhesive layer and the curing film protection layer, and the second barrier layer is arranged on a side of the polarizing layer away from the touch layer.

9. A method for preparing a display panel, characterized in that: include: providing a substrate, and forming a light-emitting layer on one side of the substrate; forming a touch layer on a side of the light-emitting layer away from the substrate; A polarizer is formed on a side of the touch layer away from the light-emitting layer, wherein the polarizer includes a polarizing layer adsorbed with iodine ions; A barrier layer is arranged between the polarizing layer and the touch control layer, and the barrier layer is made of a wide bandgap semiconductor material.

10. A display device, characterized in that: The invention comprises a display panel as claimed in any one of claims 1 to 8.

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