Display panel and electronic equipment
By introducing a blue light absorption layer into the touch layer of the display panel, the problem of increasing the thickness of optical film materials is solved, achieving a thinner and lighter display panel and reducing blue light damage, while maintaining the continuity and cost-effectiveness of the manufacturing process.
Patent Information
- Application Number
- CN202422061159.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-08-23
AI Technical Summary
Existing technologies that reduce eye damage by adding optical films to display panels to absorb blue light result in increased panel thickness, which is not conducive to thin and light designs.
An insulating structure is introduced into the touch layer of the display panel, including at least a first blue light absorption layer. This layer absorbs blue light to reduce harm to the human eye and is reused for both protection and insulation functions, thereby reducing the thickness of the display panel.
By using a touch layer structure that absorbs blue light, the thickness of the display panel can be reduced, which is beneficial for the design of thinner and lighter electronic devices. At the same time, the harm of blue light to the human eye is reduced, while maintaining the continuity and cost-effectiveness of the manufacturing process.
Smart Images
Figure CN223503357U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electronic device manufacturing technology, and in particular to a display panel and an electronic device. Background Technology
[0002] With the continuous development of technology, people are using more and more electronic products in their daily lives, including common examples such as mobile phones, tablets, laptops, smartwatches, smart bracelets, and e-readers. These electronic devices all have display functions and can display various images.
[0003] A display panel is the structure in an electronic device that enables display functionality. During image display, the blue light emitted by the panel primarily ranges from 400nm to 560nm. Within this wavelength range, some wavelengths of blue light directly enter the human eye and may damage the retina. To prevent this damage, related technologies incorporate optical films capable of absorbing specific wavelengths of blue light onto the surface or within the display panel. For example, this optical film can be adhered to the surface of the display panel using optical adhesive.
[0004] While adding optical films to the surface or inside the display panel can reduce the harm of blue light to the human eye, it also increases the thickness of the display panel, which is not conducive to the design of a thin and light display panel. Utility Model Content
[0005] This application provides a display panel and an electronic device that overcomes the problems in related technologies. The technical solution is as follows:
[0006] On one hand, embodiments of this application provide a display panel, which includes a display substrate and a touch layer. The touch layer is located on one side of the display substrate. The touch layer includes an insulating structure and a touch electrode structure, the insulating structure covering the touch electrode structure, and the insulating structure including at least a first blue light absorption layer.
[0007] Based on the above characteristics, by setting the insulating structure of the touch layer to include at least a first blue light absorption layer, the blue light emitted by the display substrate is absorbed by this first blue light absorption layer, thereby reducing the harm of blue light to the human eye. The insulating structure provides protection for the touch electrode structure and also serves as insulation. Since at least a portion of the insulating structure is set as a film layer with the function of absorbing blue light, that is, the insulating structure is reused as a structure for absorbing blue light, compared with the method of adding optical film materials to absorb blue light, the thickness of the display panel can be reduced, which is beneficial to the thinner and lighter design of electronic devices.
[0008] In some examples, the first blue light absorbing layer is located on the side of the touch electrode structure away from the display substrate.
[0009] Based on the above characteristics, the fabrication process of the touch layer requires minimal modification, allowing the fabrication of the touch layer, except for the first blue light absorption layer, to follow the fabrication process in related technologies. Furthermore, since the first blue light absorption layer is fabricated after the touch electrode structure, it is not affected by the fabrication process of the touch electrode structure.
[0010] In some examples, the touch electrode structure includes a first touch electrode layer, wherein the first blue light absorbing layer covers the surface of the first touch electrode layer away from the display substrate.
[0011] Based on the above characteristics, the first blue light absorption layer is reused as a protective and insulating film layer as well as a blue light absorption film layer. There is no need to set an additional insulating film layer to cover the first touch electrode layer, which helps to reduce the thickness of the display panel.
[0012] In some examples, the touch electrode structure further includes a second touch electrode layer located on the side of the first touch electrode layer closer to the display substrate, and the second touch electrode layer is insulated from the first touch electrode layer. Based on these features, it can be applied to a mutual capacitance display panel. During the fabrication of the touch layer, the processes prior to fabricating the first blue light absorption layer can be entirely carried out using fabrication processes from related technologies, requiring minimal changes to the fabrication process and thus saving production costs.
[0013] In some examples, the insulating structure further includes a first insulating layer located between the first touch electrode layer and the second touch electrode layer, covering the second touch electrode layer. By providing the first insulating layer to separate the first touch electrode layer and the second touch electrode layer, the first touch electrode layer and the second touch electrode layer are insulated from each other, and a relatively flat surface is provided to facilitate the formation of the first touch electrode layer.
[0014] In some examples, the insulating structure further includes a second blue light absorbing layer, which is located between the first touch electrode layer and the second touch electrode layer, covering the second touch electrode layer. Based on the above features, by setting the first and second blue light absorbing layers, blue light is absorbed together, thereby reducing the harm of blue light to the human eye.
[0015] In some examples, the touch electrode structure includes a first touch electrode layer and a second touch electrode layer. The first blue light absorbing layer covers the surface of the first touch electrode layer away from the display substrate, and the second touch electrode layer is located on the side of the first blue light absorbing layer away from the display substrate. Based on the above features, keeping the first blue light absorbing layer away from the color filter layer allows the first blue light absorbing layer and the color filter layer to be separated by other structures, reducing or avoiding damage to the first blue light absorbing layer during the fabrication of the color filter layer.
[0016] In some examples, the first blue light absorbing layer is an organic material layer. The ability of a membrane to absorb blue light is usually due to additives in the membrane material, and organic material layers are easier to incorporate additives into during the manufacturing process.
[0017] In some examples, the display panel further includes a protective layer located on the side of the touch layer away from the display substrate. Based on these features, by providing a protective layer on the side of the touch layer away from the display substrate to protect the touch layer, damage to the touch layer can be avoided during subsequent fabrication of the display panel.
[0018] In some examples, the protective layer is an inorganic material layer. The inorganic material layer can prevent swelling or miscibility with the organic material layer.
[0019] As an example, the thickness of the protective layer is 0.05 μm to 0.5 μm. Inorganic material layers are generally less flexible than organic material layers. By setting the thickness of the protective layer to 0.05 μm to 0.5 μm, the protective layer is made relatively thin, which can prevent the protective layer from affecting the bending performance of the display panel.
[0020] In some examples, the display substrate includes at least one inorganic encapsulation layer with a thickness of 0.1 μm to 0.5 μm. By providing a thin inorganic encapsulation layer, water and oxygen corrosion can be prevented while also avoiding affecting the bending performance of the display panel.
[0021] As an example, the display panel further includes a color filter layer located on the side of the touch layer away from the display substrate. The color filter layer helps improve the contrast of the display panel, thereby enhancing the display effect. Furthermore, when light emitted from the display panel and ambient light shines on the first blue light absorption layer, a portion of the blue light is absorbed. This reduction in blue light can cause a yellowish tint to the displayed image; the color filter layer can mitigate this yellowing issue.
[0022] On the other hand, embodiments of this application also provide an electronic device, which includes any of the display panels described in the preceding aspect.
[0023] Based on the above characteristics, in electronic devices, the insulating structure of the touch layer of the display panel is configured to include at least a first blue light absorption layer. This first blue light absorption layer absorbs blue light emitted by the display substrate, thereby reducing the harm of blue light to the human eye. Since at least a portion of the insulating structure is configured as a film layer with the function of absorbing blue light, that is, the insulating structure is reused as a structure for absorbing blue light, compared with the method of adding optical film materials to absorb blue light, the thickness of the display panel can be reduced, which is beneficial to the thinner and lighter design of electronic devices. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;
[0025] Figure 2 This is a schematic diagram of the structure of an encapsulation layer provided in an embodiment of this application;
[0026] Figure 3 This is a schematic diagram of the absorption spectrum of an anti-blue light additive provided in an embodiment of this application;
[0027] Figure 4 This is a schematic diagram of the blue light spectrum emitted by a display panel according to an embodiment of this application;
[0028] Figure 5 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;
[0029] Figure 6 This is a schematic diagram of the structure of a display panel in related technologies;
[0030] Figure 7 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;
[0031] Figure 8 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;
[0032] Figure 9 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.
[0033] Legend
[0034] 1. Circular polarizer 10, display substrate 100, display panel
[0035] 11. Array substrate 111, base 112, circuit structure
[0036] 12. Light-emitting layer; 121. Light-emitting unit
[0037] 13. Encapsulation layer 131. Inorganic encapsulation layer 132. Organic encapsulation layer
[0038] 20. Touch layer; 21. Insulating structure; 211. First blue light absorption layer; 212. First insulating layer
[0039] 213. Third insulating layer; 214. Second blue light absorption layer; 22. Touch electrode structure
[0040] 220, Touch electrode; 221, First touch electrode layer; 222, Second touch electrode layer
[0041] 30. Second insulation layer
[0042] 40. Protective layer
[0043] 50. Color filter layer; 51. Color resist; 52. Black matrix
[0044] 60. Cover plate; 61. Optical adhesive layer Detailed Implementation
[0045] The terminology used in the embodiments section of this application is for illustrative purposes only and is not intended to limit the application. Unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in the patent application specification and claims of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including," and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The terms "connected," "linked," and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up," "down," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0046] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application, such as... Figure 1 As shown, the display panel includes a display substrate 10 and a touch layer 20. The touch layer 20 is located on one side of the display substrate 10.
[0047] The touch layer 20 includes an insulating structure 21 and a touch electrode structure 22. The insulating structure 21 covers the touch electrode structure 22, and the insulating structure 21 includes at least a first blue light absorption layer 211.
[0048] In this embodiment, a touch layer 20 is arranged on one side of the display substrate 10. The touch layer 20 includes an insulating structure 21 and a touch electrode structure 22. By setting the insulating structure 21 of the touch layer 20 to include at least a first blue light absorption layer 211, the first blue light absorption layer 211 absorbs the blue light emitted by the display substrate 10, thereby reducing the damage of blue light to the human eye.
[0049] The insulating structure 21 in the touch layer 20 is used to protect the touch electrode structure 22 and also serves as insulation. In this embodiment, at least a portion of the insulating structure 21 is configured as a film layer with the function of absorbing blue light, that is, the insulating structure 21 is reused as a structure for absorbing blue light. Compared with the method of adding optical film material to absorb blue light, the thickness of the display panel can be reduced, which is beneficial to the thinner and lighter design of electronic devices.
[0050] like Figure 1 As shown, the display substrate 10 may include an array substrate 11, a light-emitting layer 12, and an encapsulation layer 13. The light-emitting layer 12 is located on one side of the array substrate 11, and the encapsulation layer 13 is located on the side of the light-emitting layer 12 away from the array substrate 11. The encapsulation layer 13 is used to encapsulate the display substrate 10.
[0051] The array substrate 11 includes a substrate 111 and a circuit structure 112, the circuit structure 112 being located on the surface of the substrate 111. The circuit structure 112 may include a driving circuit connected to the light-emitting layer 12, the driving circuit being used to control the light-emitting layer 12 to emit light. The circuit structure 112 may include at least a plurality of thin-film transistors.
[0052] The substrate 111 can be a glass substrate or a plastic substrate. As an example, the substrate 111 can be a flexible substrate, such as a PI (polyimide) substrate, to make the array substrate 11 flexible and facilitate the fabrication of a flexible display panel.
[0053] The light-emitting layer 12 may include a plurality of light-emitting units 121, which may be arrayed on the surface of the array substrate 11. For example, the plurality of light-emitting units 121 may include a plurality of red light-emitting units that emit red light, a plurality of green light-emitting units that emit green light, and a plurality of blue light-emitting units that emit blue light.
[0054] In some examples, the light-emitting unit 121 can be an organic light-emitting diode (OLED); in other examples, the light-emitting unit 121 can be a light-emitting diode (LED), such as a common light-emitting diode, a micro light-emitting diode (Micro LED), or a mini light-emitting diode (Mini LED).
[0055] The encapsulation layer 13 can be a single-layer structure or a multi-layer structure. As an example, Figure 2 This is a schematic diagram of the structure of an encapsulation layer provided in an embodiment of this application. For example... Figure 2As shown, the encapsulation layer 13 may include an inorganic encapsulation layer 131 and an organic encapsulation layer 132. The inorganic encapsulation layer 131 is used to prevent water and oxygen from corroding the display substrate 10. The organic encapsulation layer 132 provides protection while also reducing interlayer stress and giving the encapsulation layer 13 a certain degree of flexibility to meet bending requirements.
[0056] There may be two inorganic encapsulation layers 131, with an organic encapsulation layer 132 located between the two inorganic encapsulation layers 131. The inorganic encapsulation layer 131 may be made of one or more of silicon nitride, silicon oxide, and silicon oxynitride, and may be formed by a deposition process. The organic encapsulation layer 132 may be made of one or more of aliphatic polyester, aliphatic polyurethane, aromatic polyurethane, polyimide resin, epoxy resin, siloxane resin, and acrylic resin.
[0057] In some examples, the thickness of the inorganic encapsulation layer 131 can be 0.1μm-0.5μm, for example, 0.2μm or 0.3μm. The thickness of the organic encapsulation layer 132 can be 5μm-15μm, for example, 5μm, 10μm or 15μm. The thicknesses of the two inorganic encapsulation layers 131 can be the same or different. For example, the thickness of the inorganic encapsulation layer 131 closer to the substrate 111 can be greater than the thickness of the other inorganic encapsulation layer 131. The relatively thin thickness of the inorganic encapsulation layer 131 can prevent it from affecting the bending performance of the display panel.
[0058] In some examples, the first blue light absorption layer 211 may be located on the side of the touch electrode structure 22 away from the display substrate 10.
[0059] Since the first blue light absorption layer 211 is located on the side of the touch electrode structure 22 away from the display substrate 10, it is fabricated after the touch electrode structure 22 during the fabrication of the display panel. This results in minimal changes to the fabrication process of the touch layer 20, allowing the fabrication of the touch layer 20, except for the first blue light absorption layer 211, to follow the fabrication processes in related technologies. Furthermore, fabricating the first blue light absorption layer 211 after the touch electrode structure 22 ensures that it is not affected by the fabrication process of the touch electrode structure 22.
[0060] The touch electrode structure 22 may include multiple touch electrodes 220. In some examples, the multiple touch electrodes 220 may be arranged in the same layer. For example... Figure 1 As shown, the touch electrode structure 22 includes a first touch electrode layer 221 and a first blue light absorption layer 211 covering the surface of the first touch electrode layer 221 away from the display substrate 10.
[0061] The first blue light absorption layer 211 directly covers the first touch electrode layer 221. The first blue light absorption layer 211 not only absorbs blue light but also protects the first touch electrode layer 221, acting as an insulator. This reuse of the same film layer eliminates the need for an additional insulating film layer on the surface of the first touch electrode layer 221, which helps reduce the thickness of the display panel.
[0062] In the first touch electrode layer 221, a plurality of touch electrodes 220 are distributed at intervals. The first blue light absorption layer 211 covers the surface of the plurality of touch electrodes 220 away from the display substrate 10.
[0063] In this example, the touch electrode structure 22 includes a touch electrode layer comprising multiple touch electrodes 220 arranged in the same layer, meaning the touch layer of the display panel is a self-capacitive touch layer. Since all the touch electrodes 220 are distributed in the same layer, the thickness of the touch layer 20 can be reduced, which is beneficial for reducing the thickness of the display panel.
[0064] Optionally, the thickness of the first blue light absorption layer 211 can be 0.4 μm to 2.5 μm. In some examples, the thickness of the first blue light absorption layer 211 can be 1.2 μm to 2.0 μm. For example, the thickness of the first blue light absorption layer 211 can be 1.5 μm. The thickness of the first blue light absorption layer 211 affects its absorption rate of blue light, its protective effect on the touch electrode structure 22, and the thickness of the display panel. Setting the thickness of the first blue light absorption layer 211 to 0.4 μm to 2.5 μm allows for a high absorption rate of harmful blue light while providing sufficient protection for the touch electrode structure 22, without resulting in an excessively thick display panel. Furthermore, the first blue light absorption layer 211 also plays a role in planarization, which is beneficial for the fabrication of subsequent structures in the display panel.
[0065] In this embodiment, the first blue light absorption layer 211 is used to absorb at least a portion of harmful blue light. Harmful blue light can refer to blue light that is harmful to the human eye, for example, blue light with a wavelength range of 415nm to 455nm. The first blue light absorption layer 211 can absorb at least a portion of blue light within this wavelength range. For example, blue light with a wavelength range of 430nm to 455nm, blue light with a wavelength range of 420nm to 440nm, blue light with a wavelength range of 420nm to 430nm, blue light with a wavelength range of 430nm to 440nm, and blue light with a wavelength range of 430nm to 450nm.
[0066] In some examples, the first blue light absorbing layer 211 is an organic material layer.
[0067] The ability of a membrane material to absorb blue light is typically due to additives within the membrane. For example, the first blue light absorbing layer 211 may include a matrix and an anti-blue light additive located within the matrix. In this embodiment, the first blue light absorbing layer 211 being an organic material layer means that the majority of the substances constituting the first blue light absorbing layer 211 are organic materials. In this example, the matrix accounts for the vast majority of the mass of the first blue light absorbing layer 211. For example, in the first blue light absorbing layer 211, by mass percentage, the first blue light absorbing layer 211 is 100 parts, the matrix is 90 to 99.95 parts, and the anti-blue light additive is 0.05 to 10 parts, that is, the mass ratio of the anti-blue light additive to the first blue light absorbing layer 211 can be 1:2000 to 1:10. Within this range, the mass ratio of the anti-blue light additive to the first blue light absorption layer 211 can ensure that the anti-blue light additive in the first blue light absorption layer 211 can effectively absorb blue light while avoiding any impact on the original properties of the matrix, such as its optical or mechanical properties.
[0068] For example, in the first blue light absorbing layer 211, by mass percentage, the first blue light absorbing layer 211 is 100 parts, the matrix is 98 to 99.95 parts, and the anti-blue light additive is 0.05 to 2 parts.
[0069] The ability to absorb blue light is achieved through anti-blue light additives. Adding these additives to organic materials is relatively simple in terms of process, which helps to save on manufacturing costs. In addition, the organic material layer has good flexibility, making it easy to apply to flexible display panels.
[0070] The wavelength range of blue light absorbed by the first blue light absorbing layer 211 can be adjusted by changing the material used to manufacture the first blue light absorbing layer 211. The transmittance of the first blue light absorbing layer 211 for visible light can be adjusted based on its thickness and the material used to manufacture it.
[0071] For example, the first blue light absorbing layer 211 has a light transmittance of no more than 50% for visible light in the wavelength range of 415nm to 455nm, and a light transmittance of no less than 90% for visible light in the wavelength range of 456nm to 750nm.
[0072] In some examples, the matrix of the first blue light absorbing layer 211 can be an organic resin, such as an acrylic resin, a silicone resin, or an epoxy resin. Organic resins have high transmittance for visible light; for visible light in the wavelength range of 456 nm to 750 nm, the transmittance can typically reach over 90%. This helps reduce the absorption of visible light by the matrix and reduces the impact on the display brightness of the display panel.
[0073] In other examples, the matrix of the first blue light absorbing layer 211 may also be a material commonly used to prepare thin films, such as polyimide or polyethylene terephthalate.
[0074] Anti-blue light additives can be made from organic materials, inorganic materials, or a combination of both.
[0075] For example, in the first blue light absorbing layer 211, the anti-blue light additive may be in the form of granules or powder.
[0076] As an example, the first blue light absorbing layer 211 may include a matrix and a plurality of blue light absorbing particles located in the matrix. The blue light absorbing particles may be made using anti-blue light additives.
[0077] Multiple blue light absorbing particles can be evenly distributed in the matrix so that different areas of the first blue light absorbing layer 211 have the same absorption effect on blue light, thus avoiding differences in display effect between different areas.
[0078] As another example, the anti-blue light additive is uniformly mixed with the matrix, and the anti-blue light additive is uniformly distributed in the matrix. That is, the material for preparing the anti-blue light additive and the material for preparing the matrix are uniformly mixed during the preparation stage to form a whole, and the anti-blue light additive does not have a specific shape in the matrix.
[0079] Taking an organic resin as the matrix as an example, during the preparation stage, the anti-blue light additive and the organic resin can be mixed evenly in a molten state, and then the first blue light absorption layer 211 can be formed by molding, for example, by coating it onto the display substrate 10 and curing it to form the first blue light absorption layer 211.
[0080] Taking polyimide as an example, the anti-blue light additive can be uniformly mixed with polyimide and then processed through a film-forming process to prepare the first blue light absorption layer 211.
[0081] In some examples, the wavelength range that the first blue light absorption layer 211 can absorb can be changed by adjusting the material of the anti-blue light additive. The full width at half maximum (FWMH) of the absorption spectrum of the anti-blue light additive can be no more than 30 nm. Using an anti-blue light additive with a smaller FWMH helps to reduce the influence of the first blue light absorption layer 211 on light of wavelengths other than harmful blue light, thereby reducing the impact on display performance.
[0082] For example, the half-width at half-maximum (WHM) of the absorption spectrum of the anti-blue light additive does not exceed 15 nm; or, for another example, the WHM of the absorption spectrum of the anti-blue light additive ranges from 10 nm to 18 nm.
[0083] As an example, the absorption center wavelength of anti-blue light additives can be between 420nm and 440nm, and the full width at half maximum (FWHM) can not exceed 15nm.
[0084] Anti-blue light additives can be small organic molecule compounds. For example, anti-blue light additives can include at least one of benzotriazole compounds, benzophenone compounds, and triazine compounds. As another example, anti-blue light additives can include small organic molecule compounds containing at least one of benzotriazole functional groups, benzophenone functional groups, and triazine functional groups.
[0085] As an example, Figure 3 This is a schematic diagram of the absorption spectrum of an anti-blue light additive provided in an embodiment of this application. Figure 3 The horizontal axis in the graph represents wavelength, with units of nm. For example... Figure 3 As shown in the figure, the center wavelength of the anti-blue light additive is 420nm and the full width at half maximum (FWHM) is 15nm. The anti-blue light additive has an absorption rate of not less than 50% for blue light in the wavelength range of 430nm to 450nm, so that the light transmittance of the first blue light absorption layer 211 for blue light in the wavelength range of 430nm to 450nm does not exceed 50%, or can even be 0. The light transmittance of the first blue light absorption layer 211 for visible light in the wavelength range of 456nm to 750nm is not less than 90%. Figure 4 This is a schematic diagram of the blue light spectrum emitted by a display panel according to an embodiment of this application. The horizontal axis of the diagram represents wavelength in nm, and the vertical axis represents radiation intensity. Figure 4 As shown, due to the effect of anti-blue light additives, the radiation intensity of blue light in the wavelength range of 430nm to 450nm in the blue light spectrum emitted by the display panel is greatly reduced, while visible light in other wavelength ranges is almost unaffected.
[0086] Figure 5 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application, such as... Figure 5 As shown, compared to Figure 1 In the illustrated display panel, the touch electrode structure 22 further includes a second touch electrode layer 222. The second touch electrode layer 222 is located on the side of the first touch electrode layer 221 near the display substrate 10, and the second touch electrode layer 222 is insulated from the first touch electrode layer 221.
[0087] The first touch electrode layer 221 and the second touch electrode layer 222 each include a plurality of touch electrodes 220. As an example, the touch electrodes 220 can be strip electrodes, and the touch electrodes 220 in the first touch electrode layer 221 and the touch electrodes 220 in the second touch electrode layer 222 are arranged to intersect and are insulated from each other.
[0088] For different display panels, the arrangement and shape of the touch electrodes 220 in the touch electrode structure 22 may vary. In this example, the touch layer 20 of the display panel is a mutual capacitance touch layer, and the touch electrodes 220 in the first touch electrode layer 221 and the touch electrodes 220 in the second touch electrode layer 222 are arranged in a cross-insulated manner to determine the position of the touch operation.
[0089] exist Figure 5 In the example shown, since the first blue light absorption layer 211 is disposed on the side of the first touch electrode layer 221 away from the second touch electrode layer 222, the fabrication of the first touch electrode layer 221 and the second touch electrode layer 222 both precede the fabrication of the first blue light absorption layer 211. During the fabrication of the touch layer 20, the processes prior to the fabrication of the first blue light absorption layer 211 can be entirely fabricated using existing related technologies, resulting in minimal changes to the fabrication process and thus saving production costs. Furthermore, the fabrication process of the touch electrode 220, such as the patterning process, will not affect the first blue light absorption layer 211.
[0090] In some examples, the touch layer 20 may include an insulating block located at the intersection of the touch electrode 220 in the first touch electrode layer 221 and the touch electrode 220 in the second touch electrode layer 222. This structure allows at least part of the first touch electrode layer 221 and the second touch electrode layer 222 to be arranged in the same layer to reduce the thickness.
[0091] For example, the touch electrodes 220 of the second touch electrode layer 222 may include multiple electrode blocks and multiple bridging wires, with adjacent electrode blocks connected by bridging wires. The multiple electrode blocks may be arranged in the same layer as the touch electrodes 220 in the first touch electrode layer 221, and the insulating block is located at the intersection of the bridging wires and the touch electrodes 220 in the first touch electrode layer 221.
[0092] In this example, such as Figure 5 As shown, the insulating structure 21 also includes a first insulating layer 212, which is located between the first touch electrode layer 221 and the second touch electrode layer 222, and covers the second touch electrode layer 222.
[0093] By providing a first insulating layer 212 to separate the first touch electrode layer 221 and the second touch electrode layer 222, the first touch electrode layer 221 and the second touch electrode layer 222 are insulated from each other. The first insulating layer 212 can provide a relatively flat surface for the fabrication of the first touch electrode layer 221, making it convenient for the first touch electrode layer 221 to be directly formed on the surface of the first insulating layer 212 away from the second touch electrode layer 222.
[0094] For example, the first insulating layer 212 can be an organic material layer or an inorganic material layer, and the first insulating layer 212 can be a single-layer structure or a multi-layer structure.
[0095] For example, the first insulating layer 212 may include at least one of a silicon nitride layer, a silicon oxide layer, and a silicon oxynitride layer; or, for example, the first insulating layer 212 may include at least one of an acrylic resin layer, an organosilicon resin layer, and an epoxy resin layer.
[0096] When the first insulating layer 212 is an organic material layer, its thickness can be 1 μm to 2 μm. Setting the thickness of the first insulating layer 212 to 1 μm to 2 μm allows the surface of the first insulating layer 212 away from the display substrate 10 to be relatively flat, which facilitates the fabrication of the first touch electrode layer 221. Furthermore, the organic material layer has a certain degree of flexibility, meaning that setting the thickness to 1 μm to 2 μm does not affect bending.
[0097] When the first insulating layer 212 is an inorganic material layer, its thickness can be 0.2 μm to 1.5 μm. Inorganic material layers are generally less flexible than organic material layers. Setting the thickness of the first insulating layer 212 to 0.2 μm to 1.5 μm makes it relatively thin, so as to avoid the first insulating layer 212 affecting the bending of the display panel.
[0098] like Figure 5 As shown, compared to Figure 1 In the example shown, the touch layer 20 in the display panel also includes a second insulating layer 30, and the touch electrode structure 22 is located on the surface of the second insulating layer 30 away from the display substrate 10.
[0099] The second insulating layer 30 can serve as a transition, providing a relatively flat surface for the fabrication of the second touch electrode layer 222.
[0100] For example, the second insulating layer 30 can be an organic material layer or an inorganic material layer, and the second insulating layer 30 can be a single-layer structure or a multi-layer structure.
[0101] For example, the second insulating layer 30 may include at least one of a silicon nitride layer, a silicon oxide layer, and a silicon oxynitride layer; or, for another example, the second insulating layer 30 may include at least one of an acrylic resin layer, an organosilicon resin layer, and an epoxy resin layer.
[0102] When the second insulating layer 30 is an organic material layer, its thickness can be 1 μm to 3 μm. Setting the thickness of the second insulating layer 30 to 1 μm to 3 μm allows the surface of the second insulating layer 30 away from the display substrate 10 to be relatively flat, facilitating the fabrication of the second touch electrode layer 222. Furthermore, the organic material layer has a certain degree of flexibility, meaning that setting the thickness to 1 μm to 3 μm does not affect bending.
[0103] When the second insulating layer 30 is an inorganic material layer, its thickness can be 0.2 μm to 1.5 μm. Inorganic material layers are generally less flexible than organic material layers. Setting the thickness of the second insulating layer 30 to 0.2 μm to 1.5 μm makes it relatively thin, so as to avoid the second insulating layer 30 affecting the bending of the display panel.
[0104] like Figure 5 As shown, compared to Figure 1 The display panel shown is Figure 5 The display panel shown also includes a protective layer 40, which is located on the side of the touch layer 20 away from the display substrate 10.
[0105] The protective layer 40 is used to protect the touch layer 20 from damage during subsequent fabrication of the display panel.
[0106] In this example, the display panel also includes a color filter layer 50, which is located on the side of the touch layer 20 away from the display substrate 10. The protective layer 40 can prevent damage to the touch layer 20 during the fabrication of the color filter layer 50.
[0107] As an example, the color filter layer 50 may include a plurality of color resists 51 and a black matrix 52, with the plurality of color resists 51 arranged in an array and the black matrix 52 distributed between adjacent color resists 51. Exemplarily, the plurality of color resists 51 may include a red color resist that allows red light to pass through, a green color resist that allows green light to pass through, and a blue color resist that allows blue light to pass through.
[0108] The display substrate 10 contains structures with strong reflective capabilities. For example, when the light-emitting unit 121 is an OLED, the anode or cathode of the light-emitting unit 121 has strong reflective capabilities. These highly reflective structures cause strong reflection of ambient light, resulting in a decrease in the contrast of the display panel and affecting the display effect. By setting a color filter layer 50, ambient light shining on the display substrate 10 must first pass through the color filter layer 50. Taking red color resist as an example, red color resist has high light transmittance only for red light and low transmittance for other colors. When ambient light shines on the display panel, only red light shines into the display panel, while other colors are almost absorbed by the red color resist. After the red light entering the display panel is reflected by the display substrate 10, only the red color resist can shine through to the outside of the display panel, while other colors are absorbed. This greatly reduces the impact of ambient light reflected by the display substrate 10 on the contrast of the display panel, which is beneficial to improving the display effect.
[0109] Figure 6 This is a structural diagram of a display panel in related technologies, such as... Figure 6 As shown, in this display panel, a circular polarizer 1 is bonded to one side of the display substrate 10 with optical adhesive, and a cover plate 60 is bonded to the side of the circular polarizer 1 away from the display substrate 10 with optical adhesive. The purpose of setting the circular polarizer 1 is to reduce the intensity of ambient light reflected by the display substrate 10, thereby improving the contrast and display effect of the display panel. However, since the circular polarizer 1 is an absorptive polarizer, its light transmittance is typically only 43%, which means that using the circular polarizer 1 to reduce reflection will significantly affect the light extraction efficiency of the display panel.
[0110] In this embodiment, by setting a color filter layer 50 to reduce reflection, the light output efficiency of the display panel can reach about 60%, which is more conducive to improving the light output efficiency of the display panel.
[0111] When light emitted from the light-emitting unit 121 and ambient light shine onto the first blue light absorption layer 211, a portion of the blue light is absorbed by the first blue light absorption layer 211, which can cause the displayed image to appear yellowish. In this example, the color filter layer 50 is located on the side of the first blue light absorption layer 211 away from the display substrate 10. Setting the color filter layer 50 can reduce the yellowing problem and improve the display effect.
[0112] As an example, the protective layer 40 is an inorganic material layer. The protective layer 40 can be a single-layer structure or a multi-layer structure.
[0113] Exemplarily, the protective layer 40 may include at least one of a silicon nitride layer, a silicon oxide layer, and a silicon oxynitride layer. For example, in some examples, the protective layer 40 may include a silicon nitride layer, and in other examples, the protective layer 40 may include a silicon oxynitride layer.
[0114] The protective layer 40 is located on the side of the first blue light absorption layer 211 away from the display substrate 10, separating the first blue light absorption layer 211 from the color filter layer 50. In this way, damage to the first blue light absorption layer 211 can be avoided during the fabrication of the color filter layer 50, for example, by preventing chemical reagents such as developing solutions from damaging the first blue light absorption layer 211.
[0115] In some examples, the first blue light absorption layer 211 is an organic material protective layer 40, while the protective layer 40 is an inorganic material layer. This prevents swelling or dissolution between the first blue light absorption layer 211 and the color filter layer 50, thus preventing any impact on the performance of the first blue light absorption layer 211. Furthermore, swelling or dissolution at the interface between the first blue light absorption layer 211 and the color filter layer 50 can affect the propagation of light at the interface, causing a significant change in the direction of light propagation and affecting the display effect. By providing the protective layer 40 to separate the first blue light absorption layer 211 and the color filter layer 50, swelling or dissolution can be avoided, thus preventing any adverse effects on the display effect.
[0116] Optionally, the thickness of the protective layer 40 can be 0.05 μm to 0.5 μm.
[0117] Inorganic material layers are generally less flexible than organic material layers. The thickness of the protective layer 40 is set to 0.05μm to 0.5μm to make it relatively thin, so as to avoid the protective layer 40 affecting the bending of the display panel.
[0118] As an example, the thickness of the protective layer 40 can be 0.08μm to 0.15μm, and the thickness of the inorganic encapsulation layer 131 in the encapsulation layer 13 can be 0.1μm to 0.5μm.
[0119] In this example, both the protective layer 40 and the inorganic encapsulation layer 131 are inorganic material layers. Excessive thickness would hinder the bending performance of the display panel. Adding the protective layer 40 would increase the total thickness of the inorganic material layers in the display panel. In this example, by setting the thickness of the inorganic encapsulation layer 131 to a smaller value, the total thickness of the inorganic material layers in the display panel changes less after adding the protective layer 40, thus having a minimal impact on the bending performance of the display panel.
[0120] like Figure 5 As shown, the display panel may also include a cover plate 60, which is located on the side of the color filter layer 50 away from the touch layer 20.
[0121] As an example, the cover plate 60 can be bonded to the color filter layer 50 via an optical adhesive layer 61. The cover plate 60 serves to protect the display panel and helps extend its service life.
[0122] Figure 7 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application, such as... Figure 7 As shown, in this example, the touch electrode structure 22 includes a first touch electrode layer 221 and a second touch electrode layer 222. The first blue light absorption layer 211 covers the surface of the first touch electrode layer 221 away from the display substrate 10, and the second touch electrode layer 222 is located on the side of the first blue light absorption layer 211 away from the display substrate 10.
[0123] In this example, since the first blue light absorption layer 211 is located on the side of the first blue light absorption layer 211 away from the display substrate 10, the first blue light absorption layer 211 is far away from the color filter layer 50, so that the first blue light absorption layer 211 and the color filter layer 50 can be separated by other structures, thereby reducing or avoiding damage to the first blue light absorption layer 211 during the fabrication of the color filter layer 50.
[0124] like Figure 7 As shown, in this example, the insulating structure 21 further includes a third insulating layer 213, which is located on the side of the second touch electrode layer 222 away from the display substrate 10. The third insulating layer 213 separates the color filter layer 50 from the first blue light absorption layer 211 to avoid damage to the first blue light absorption layer 211 during the fabrication of the color filter layer 50.
[0125] Optionally, the third insulating layer 213 can be an organic material layer or an inorganic material layer.
[0126] For example, the third insulating layer 213 may include at least one of a silicon nitride layer, a silicon oxide layer, and a silicon oxynitride layer; or, for example, the third insulating layer 213 may include at least one of an acrylic resin layer, an organosilicon resin layer, and an epoxy resin layer.
[0127] As an example, the third insulating layer 213 is an inorganic material layer, which allows it to function similarly to the aforementioned protective layer 40, preventing swelling or dissolution between the first blue light absorption layer 211 and the color filter layer 50. Therefore, in this example, when the third insulating layer 213 is an inorganic material layer, even omitting the aforementioned protective layer 40, swelling or dissolution between the first blue light absorption layer 211 and the color filter layer 50 can still be prevented.
[0128] Figure 8 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application. For example... Figure 8 As shown, compared to Figure 5 The display panel shown is Figure 8The display panel shown does not have a first insulating layer 212. For example... Figure 8 As shown, the insulating structure 21 includes a first blue light absorption layer 211 and a second blue light absorption layer 214. The first blue light absorption layer 211 covers the surface of the first touch electrode layer 221 away from the display substrate 10. The second blue light absorption layer 214 is located between the first touch electrode layer 221 and the second touch electrode layer 222, and covers the second touch electrode layer 222.
[0129] In this example, by setting a first blue light absorption layer 211 and a second blue light absorption layer 214, blue light is absorbed together to reduce the damage of blue light to the human eye.
[0130] The second blue light absorption layer 214 can be the same as the first blue light absorption layer 211, as can be found in the aforementioned description of the first blue light absorption layer 211.
[0131] This application also provides an electronic device, which may be, but is not limited to, a mobile phone, tablet computer, laptop computer, wearable electronic device, or watch. Taking a mobile phone as an example, this application embodiment can be a foldable phone or a non-foldable phone. Figure 9 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Taking a mobile phone as an example, as shown... Figure 9 As shown, the mobile phone has a display panel 100, which can be any of the aforementioned display panels.
[0132] In this embodiment, the insulating structure 21 of the touch layer 20 of the display panel 100 in the electronic device is configured to include at least a first blue light absorption layer 211. This first blue light absorption layer 211 absorbs blue light emitted from the display substrate 10, thereby reducing the harmful effects of blue light on the human eye. The insulating structure 21 provides protection for the touch electrode structure 22 and also serves as insulation. Since at least a portion of the insulating structure 21 is configured as a film layer with blue light absorption functionality, effectively reusing the insulating structure 21 as a blue light absorption structure, the thickness of the display panel 100 can be reduced compared to adding optical film materials to absorb blue light, which is beneficial for the thinner and lighter design of the electronic device.
[0133] The above description is merely one embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A display panel, characterized in that, include: Display substrate (10); A touch layer (20) is located on one side of the display substrate (10); The touch layer (20) includes an insulating structure (21) and a touch electrode structure (22), wherein the insulating structure (21) covers the touch electrode structure (22), and the insulating structure (21) includes at least a first blue light absorption layer (211).
2. The display panel according to claim 1, characterized in that, The first blue light absorption layer (211) is located on the side of the touch electrode structure (22) away from the display substrate (10).
3. The display panel according to claim 2, characterized in that, The touch electrode structure (22) includes a first touch electrode layer (221), and the first blue light absorption layer (211) covers the surface of the first touch electrode layer (221) away from the display substrate (10).
4. The display panel according to claim 3, characterized in that, The touch electrode structure (22) further includes a second touch electrode layer (222), which is located on the side of the first touch electrode layer (221) close to the display substrate (10). The second touch electrode layer (222) is insulated from the first touch electrode layer (221).
5. The display panel according to claim 4, characterized in that, The insulating structure (21) further includes a first insulating layer (212), which is located between the first touch electrode layer (221) and the second touch electrode layer (222) and covers the second touch electrode layer (222).
6. The display panel according to claim 4, characterized in that, The insulating structure (21) further includes a second blue light absorption layer (214), which is located between the first touch electrode layer (221) and the second touch electrode layer (222), and covers the second touch electrode layer (222).
7. The display panel according to claim 1, characterized in that, The touch electrode structure (22) includes a first touch electrode layer (221) and a second touch electrode layer (222). The first blue light absorption layer (211) covers the surface of the first touch electrode layer (221) away from the display substrate (10), and the second touch electrode layer (222) is located on the side of the first blue light absorption layer (211) away from the display substrate (10).
8. The display panel according to any one of claims 1 to 7, characterized in that, The first blue light absorption layer (211) is an organic material layer.
9. The display panel according to any one of claims 1 to 7, characterized in that, It also includes a protective layer (40) located on the side of the touch layer (20) away from the display substrate (10).
10. The display panel according to claim 9, characterized in that, The protective layer (40) is an inorganic material layer.
11. The display panel according to claim 10, characterized in that, The thickness of the protective layer (40) is 0.05μm to 0.5μm.
12. The display panel according to any one of claims 1 to 7, characterized in that, The display substrate (10) includes at least one inorganic encapsulation layer (131) with a thickness of 0.1 μm-0.5 μm.
13. The display panel according to any one of claims 1 to 7, characterized in that, It also includes a color filter layer (50) located on the side of the touch layer (20) away from the display substrate (10).
14. An electronic device, characterized in that, Includes the display panel as described in any one of claims 1 to 13.