Display panel and display device

Abstract

The embodiment of the invention provides a display panel and a display device. The display panel comprises a display substrate, a polarization layer and a barrier layer. The display substrate comprises at least one inorganic material layer. The polarization layer is located on one side of the display substrate and comprises a polarization function layer. The barrier layer is at least arranged between the inorganic material layer and the polarization function layer, and the barrier layer is configured to prevent the acid-base gas from diffusing to the polarization function layer. Acid-base gas generated by the inorganic material layer is prevented from permeating into the polarization function layer, so that the possibility of polarization function failure of the polarization function layer caused by contact between the polarization function layer and the acid-base gas can be reduced, the contrast ratio of the display panel is improved, the possibility of picture distortion of the display panel is reduced, and the display quality is improved. And the user experience is improved.

Description

Display panel and display device Technical Field

[0001] This disclosure relates to the field of display technology, and more particularly to a display panel and a display device. Background Technology

[0002] Organic light-emitting diodes (OLEDs) are active-matrix display devices that offer advantages such as self-illumination, wide viewing angles, high contrast, low power consumption, extremely fast response times, thinness, flexibility, and low cost. With the continuous development of display technology, display devices using OLEDs as the light-emitting device and thin-film transistors (TFTs) for signal control have become the mainstream products in the display field.

[0003] During the manufacturing process of the display panel in the display device, residual acid and alkali gases from the preparation of some film layers can affect the subsequent preparation of functional film layers, thereby reducing the display effect and service life. Summary of the Invention

[0004] This disclosure provides a display panel and a display device to solve or alleviate one or more technical problems in the prior art.

[0005] As a first aspect of the present disclosure, the present disclosure provides a display panel, comprising: a display substrate, the display substrate including at least one inorganic material layer; a polarizing layer located on one side of the display substrate, the polarizing layer including a polarization functional layer; and a blocking layer disposed at least between the inorganic material layer and the polarization functional layer, the blocking layer being configured to block acid and alkaline gases from diffusing to the polarization functional layer.

[0006] As a second aspect of the present disclosure, the present disclosure provides a display device, including the display panel described in the present disclosure.

[0007] The technical solution of this disclosure embodiment, by providing a barrier layer, which acts as a barrier between the inorganic material layer and the polarization functional layer, can prevent acid and alkaline gases generated by the inorganic material layer from penetrating into the polarization functional layer. This reduces the possibility of the polarization functional layer failing due to contact with acid and alkaline gases, improves the contrast of the display panel, reduces the possibility of image distortion, and enhances the user experience.

[0008] The above overview is for illustrative purposes only and is not intended to be limiting in any way. Further aspects, embodiments, and features of this disclosure will become readily apparent from the accompanying drawings and the following detailed description, in addition to the illustrative aspects, embodiments, and features described above. Attached Figure Description

[0009] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments according to this disclosure and should not be construed as limiting the scope of this disclosure.

[0010] Figure 1 is a cross-sectional schematic diagram of a display panel; Figure 2 is a cross-sectional schematic diagram of a polarizing layer in a display panel; Figure 3 is a cross-sectional schematic diagram of a display panel; Figure 4 is a cross-sectional schematic diagram of a display panel; Figure 5 is a cross-sectional schematic diagram of a polarizing layer in a display panel; Figure 6 is a cross-sectional schematic diagram of a polarizing layer in a display panel; Figure 7 is a cross-sectional schematic diagram of a display panel; Figure 8 is a cross-sectional schematic diagram of a display panel; Figure 9 is a cross-sectional schematic diagram of a blocking layer in a display panel; Figure 10 is a cross-sectional schematic diagram of a blocking layer in a display panel; Figure 11 is a cross-sectional schematic diagram of a display panel; Figure 12 is a structural schematic diagram of a display device.

[0011] Explanation of reference numerals: 100, display device; 10, display substrate; 11, array substrate; 111, substrate; 112, driving device layer; 1121, source / drain; 1122, gate; 1123, active layer; 1124, light-shielding layer; 12, light-emitting layer; 121, organic light-emitting unit; 20, polarizing layer; 21, polarization functional layer; 22, support and protection layer; 221, first support and protection layer; 222, second support and protection layer; 23 1. Adhesive layer; 24. Waveplate functional layer; 30. Barrier layer; 31. First barrier layer; 32. Second barrier layer; 33. Third barrier layer; 30a. Main body layer; 30b. Absorbing part; 30c. Absorbing layer; 40. Encapsulation layer; 41. First inorganic encapsulation layer; 42. Organic encapsulation layer; 43. Second inorganic encapsulation layer; 50. Touch layer; 51. Touch metal layer; 511. Touch electrode layer; 512. Touch bridge layer; 52. Touch insulating layer. Detailed Implementation

[0012] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this disclosure, and different embodiments can be combined arbitrarily without conflict. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0013] As market demands for display quality continue to rise, OLED displays, with their unique advantages in luminous properties, color reproduction, and lifespan, continue to expand their market share. To further promote the development of OLED display technology and meet higher standards in optical performance, product quality, and lifespan, polarizers (POLs) are indispensable core components of displays. Their primary function is to suppress surface reflections and regulate light scattering to widen the viewing angle, ensuring users can clearly observe the displayed content.

[0014] Polarizers are mainly divided into two categories: iodine-based and dye-based. Among them, iodine-based polarizers are the most widely used. Although they easily achieve excellent optical performance with high transmittance and high polarization degree, their resistance to high temperature and humidity is poor. This is because its core, polyvinyl alcohol-iodine complex (PVA-I), is quite sensitive to temperature and humidity and can react with some acidic and alkaline substances, ultimately leading to the failure of polarization function. Specifically, the polarizer (POL) may appear reddish, bluish, or faded.

[0015] However, in the manufacturing process of display panels, the preparation of some film layers requires etching processes. These etching processes use acidic or alkaline liquids or gases. Due to process errors, localized depressions in the film layer, or other factors, some of these acidic or alkaline liquids or gases remain within the prepared film layer. Furthermore, in some high-temperature and high-humidity environments, inorganic material film layers can decompose, producing acidic or alkaline water vapor. These gases diffuse between film layers, and the polarization functional layer in the polarization layer can denature under the influence of these acidic or alkaline gases, affecting the display effect and consequently impacting the user experience.

[0016] Figure 1 is a cross-sectional schematic diagram of a display panel. Figure 2 is a cross-sectional schematic diagram of a polarizing layer in a display panel.

[0017] As shown in Figures 1 and 2, this application provides a display panel, which includes a display substrate 10, a polarizing layer 20, and a blocking layer 30. The display substrate 10 includes at least one inorganic material layer. The polarizing layer 20 is located on one side of the display substrate 10 and includes a polarization functional layer 21. The blocking layer 30 is disposed at least between the inorganic material layer and the polarization functional layer 21, and the blocking layer 30 is configured to block the diffusion of acid and alkaline gases to the polarization functional layer 21.

[0018] The display panel in this application embodiment includes an organic light-emitting diode (OLED) display panel, a liquid crystal display (LCD) panel, a quantum dot light-emitting diode (QLED) display panel, etc., and this application embodiment does not specifically limit it.

[0019] For example, the display panel is an OLED display panel, and the display substrate 10 may include an array substrate 11, a light-emitting layer 12 located on one side of the array substrate 11, and an encapsulation layer 40 located on the side of the light-emitting layer 12 facing away from the array substrate 11. A polarizing layer 20 is disposed on the side of the encapsulation layer 40 facing away from the array substrate 11. Alternatively, the display panel is an LCD display panel (not shown in the figure), and the display substrate 10 may include an array substrate 11, a color filter substrate, and a liquid crystal layer located between the array substrate 11 and the color filter substrate. The polarizing layer 20 may include a first polarizing layer located on the side of the array substrate 11 facing away from the liquid crystal layer and a second polarizing layer located on the side of the color filter substrate facing away from the liquid crystal layer. A blocking layer 30 may be disposed between the array substrate 11 and the first polarizing layer. And / or, the blocking layer 30 is located between the color filter substrate and the second polarizing layer.

[0020] The display substrate 10 includes at least one inorganic material layer. For example, the array substrate 11 includes a substrate 111 and a driving device layer 112 located on one side of the substrate 111. The driving device layer 112 includes driving devices such as transistors and capacitors. The driving devices such as transistors and capacitors are composed of multiple conductive layers, and an insulating layer is provided between adjacent conductive layers. The insulating layer can be an inorganic material layer. The barrier layer 30 can be located between the insulating layer and the polarization functional layer 21, which are the layers with the largest distance from the substrate 111, in the array substrate 11. Some inorganic material layers use acidic or alkaline gases (or liquids) as etching gases (or etching liquids) or raw materials during the preparation process. After preparation, acidic or alkaline gases can easily remain at surface defects or pinholes of the inorganic material layers. Some inorganic material layers may decompose and generate acidic or alkaline gases during subsequent use, such as in high temperature and high humidity environments (e.g., screen reliability evaluation). The barrier layer can block the residual acidic or alkaline gases and also block the acidic or alkaline gases generated during decomposition.

[0021] A planarization layer, which can be an inorganic material layer, may also be included between the array substrate 11 and the light-emitting layer 12. A barrier layer 30 may also be disposed between the planarization layer and the polarization functional layer 21. Of course, the display substrate 10 may also include other inorganic material layers, such as an encapsulation layer 40 and a touch insulating layer 52, and the barrier layer 30 may also be disposed between other inorganic material layers and the polarization functional layer 21. It should be noted that the barrier layer 30 may be disposed between the inorganic material layer closest to the polarization functional layer 21 and the polarization functional layer 21 to maximize the blocking of acidic or alkaline gases diffusing from the side of the polarization functional layer 21 towards the array substrate to the polarization functional layer 21.

[0022] For example, the material of the polarization functional layer 21 may include polyvinyl alcohol (PVA). After the PVA film is stretched and oriented, it adsorbs iodine molecules (iodine-based polarizing layer) or dye molecules (dye-based polarizing layer). These molecules will form a "polarization channel" with the orientation of the PVA molecules, allowing only linearly polarized light in the same direction as the channel to pass through, blocking light in other directions, thereby achieving the polarization effect.

[0023] Optionally, the polarizing layer 20 may further include auxiliary functional layers, such as a support protective layer 22, an adhesive layer 23, and a waveplate functional layer 24. Specifically, the support protective layer 22 may include two layers, with the two support protective layers 22 disposed on opposite sides of the polarizing functional layer 21. Optionally, a protective film may be provided on the outermost layer of the auxiliary functional layer of the polarizing layer. The polarizing layer and the display substrate may be fabricated separately. After the polarizing layer is fabricated, the outermost protective film can reduce the possibility of contamination of the polarizing layer after fabrication. When other film layers in the display panel are fabricated, the protective film can be removed before covering the other film layers with the polarizing layer. The support protective layer 22 is located on the side of the support layer 23 facing away from the polarizing functional layer 21. Optionally, the support protective layer 22 may include a cyclic olefin polymer (COP) layer. The support protective layer 22 may also include an ultraviolet absorption hard coat cyclic olefin polymer (UVAHC-COP), i.e., an ultraviolet absorption high hardness cyclic olefin polymer layer. Optionally, the COP layer can be disposed on the side of the polarization functional layer 21 facing away from the display substrate 10. The UVAHC-COP layer can be disposed on the side of the polarization functional layer 21 facing the display substrate 10. The adhesive layer 23 can be disposed between the support protective layer 22 and the protective film. The waveplate functional layer 24 may include surface functional layers such as anti-glare (AG), anti-reflection (AR), or anti-fingerprint (AF). The waveplate functional layer 24 can be located between the COP layer and the adhesive layer 23.

[0024] The barrier layer 30 is configured to prevent acid and alkaline gases from diffusing into the polarization functional layer 21. The barrier layer 30 can prevent the diffusion of acid and alkaline gases into the polarization functional layer 21 by absorbing the gases, blocking them on the side of the barrier layer 30 opposite to the polarization functional layer 21, or locking the gases within the barrier layer 30. Here, "acid and alkaline gases" refers to either acidic or alkaline gases. It should be noted that the etching material remaining in the inorganic material layer can be an acid or alkaline gas, or an acid or alkaline liquid, which can be converted into an acid or alkaline gas. Optionally, the acidic gas in the acid or alkaline gas may include NO acidic gas; the alkaline gas in the acid or alkaline gas may include NH3 alkaline gas.

[0025] In the display panel provided in this application embodiment, a barrier layer 30 is provided. The barrier layer 30 acts as a barrier between the inorganic material layer and the polarization functional layer 21, which can prevent acid and alkaline gases generated by the inorganic material layer from penetrating into the polarization functional layer 21. This reduces the possibility of the polarization function of the polarization functional layer 21 failing due to contact with acid and alkaline gases, improves the contrast of the display panel, reduces the possibility of image distortion, and improves the user experience.

[0026] Among them, "acid and alkali gases generated by the inorganic material layer" includes, but is not limited to, the residual acid and alkali gases generated during the preparation of the inorganic material layer and the acid and alkali gases generated by the subsequent decomposition of the inorganic material layer.

[0027] In one feasible implementation, as shown in FIG1, the orthogonal projection of the blocking layer 30 on the display substrate 10 covers the orthogonal projection of the polarization functional layer 21 on the display substrate 10.

[0028] For example, the orthographic projection of the polarization functional layer 21 onto the display substrate 10 falls within the orthographic projection of the barrier layer 30 onto the display substrate 10. The orthographic projection area of ​​the barrier layer 30 onto the display substrate 10 is greater than or equal to the orthographic projection area of ​​the polarization functional layer 21 onto the display substrate 10. This increases the blocking area of ​​the barrier layer 30, further reducing the possibility of acid and alkali gases penetrating into the polarization functional layer 21 and improving the reliability of the polarization layer 20.

[0029] Figure 3 is a schematic cross-sectional view of a display panel (II). Figure 4 is a schematic cross-sectional view of a display panel (III). Figure 5 is a schematic cross-sectional view of a polarizing layer in a display panel (II). Figure 6 is a schematic cross-sectional view of a polarizing layer in a display panel (III). Figure 7 is a schematic cross-sectional view of a display panel (IV). Figure 8 is a schematic cross-sectional view of a display panel (V).

[0030] In one feasible implementation, as shown in Figures 1 to 8, the display panel further includes an encapsulation layer 40, which is located between the display substrate 10 and the polarizing layer 20. The encapsulation layer 40 includes a first inorganic encapsulation layer 41 and an organic encapsulation layer 42 that are sequentially stacked in a direction away from the display substrate 10, and a blocking layer 30 is disposed between the first inorganic encapsulation layer 41 and the polarizing functional layer 21.

[0031] In the above embodiment, the encapsulation layer 40 includes a first inorganic encapsulation layer 41 and an organic encapsulation layer 42, with the first inorganic encapsulation layer 41 located between the display substrate 10 and the organic encapsulation layer 42. The light-emitting layer 12 of the display substrate 10 may include a plurality of organic light-emitting units 121, and the first inorganic encapsulation layer 41 may cover the plurality of organic light-emitting units 121. The organic encapsulation layer 42 ensures good flatness of the portion of the display panel located within the display area, thereby ensuring better performance of other functional layers (e.g., touch layer 50) subsequently formed on the portion of the encapsulation layer 40 located within the display area.

[0032] In these embodiments, by placing the barrier layer 30 between the first inorganic encapsulation layer 41 and the polarization functional layer 21, the design flexibility of the barrier layer 30 is improved, so that the barrier layer 30 can be specifically arranged between the residual acid and alkali gases and the polarization functional layer 21, thereby reducing the possibility of acid and alkali gases diffusing into the polarization functional layer 21, improving the reliability of the polarization layer 20, and improving the display effect.

[0033] In the above embodiments, the barrier layer 30 can not only block the acid and alkaline gases generated by the inorganic material layer in the array substrate 11, but also block the acid and alkaline gases generated by the first inorganic encapsulation layer 41 in the encapsulation layer 40, so as to further prevent the acid and alkaline gases from contacting the polarization functional layer 21, thereby further ensuring the performance of the polarization functional layer 21.

[0034] Among them, "acid and alkali gases generated by the first inorganic encapsulation layer 41" includes, but is not limited to, the residual acid and alkali gases generated during the preparation of the first inorganic encapsulation layer 41 and the acid and alkali gases generated by the subsequent decomposition of the first inorganic encapsulation layer 41.

[0035] In one feasible implementation, as shown in Figures 1 to 8, the encapsulation layer 40 further includes a second inorganic encapsulation layer 43, which is located on the side of the organic encapsulation layer 42 facing away from the display substrate 10. The barrier layer 30 includes a first barrier layer 31, which includes the second inorganic encapsulation layer 43. Alternatively, the first barrier layer 31 is disposed between the second inorganic encapsulation layer 43 and the polarizing layer 20, and the first barrier layer 31 is in contact with the second inorganic encapsulation layer 43. And / or, the polarizing layer 20 further includes a support and protective layer 22, which is disposed on the polarization functional layer 21 facing away from the display substrate 10. On one side of the display substrate 10, the barrier layer 30 includes a second barrier layer 32, which includes a support protective layer 22, or the second barrier layer 32 is disposed between the support protective layer 22 and the polarization functional layer 21; and / or, the display panel further includes a touch layer 50, which is located between the encapsulation layer 40 and the polarization layer 20, and includes a touch metal layer 51 and a touch insulating layer 52. The barrier layer 30 includes a third barrier layer 33, which includes the touch insulating layer 52, or the third barrier layer 33 is located between the touch insulating layer 52 and the polarization layer 20.

[0036] For example, the first inorganic encapsulation layer 41 is closer to the display substrate 10 than the second inorganic encapsulation layer 43. The second inorganic encapsulation layer 43 is used to cover the organic encapsulation layer 42, reducing the possibility of moisture from the external environment penetrating the organic encapsulation layer 42 from the display side of the display substrate, causing encapsulation failure.

[0037] As shown in Figures 3 and 4, when the barrier layer 30 includes a first barrier layer 31, the first barrier layer 31 can include the following two configuration methods: For example, as shown in Figure 3, the first barrier layer 31 can be a second inorganic encapsulation layer 43. The first barrier layer 31 can serve as an encapsulation structure to block external moisture from entering the organic encapsulation layer 42, and can also serve as a barrier structure to block residual acid and alkali gases in the inorganic material layer on the side of the second inorganic encapsulation layer 43 facing away from the polarizing layer 20 from diffusing to the polarizing layer 20, thereby simplifying the overall manufacturing process of the display panel and reducing the manufacturing cost of the display panel.

[0038] At this time, the second inorganic encapsulation layer 43, as a film layer that can block the diffusion of acid and alkali gases to the polarization functional layer 21, is made of a different material than that of conventional inorganic encapsulation layers.

[0039] For example, as shown in FIG4, the first barrier layer 31 is disposed on the side of the second inorganic encapsulation layer 43 facing away from the display substrate 10. The first barrier layer 31 can block residual acid and alkaline gases in the inorganic material layer of the second inorganic encapsulation layer 43 and the side of the second inorganic encapsulation layer 43 facing away from the polarizing layer 20, thereby reducing the possibility of residual acid and alkaline gases in the organic material layer of the display substrate 10 and the encapsulation layer 40 diffusing across the first barrier layer 31 to the polarization functional layer 21. At this time, the material of the second inorganic encapsulation layer 43 may include the material of a conventional inorganic encapsulation layer, and the material of the second inorganic encapsulation layer 43 may include the material of the first barrier layer 31. By disposing of the first barrier layer 31 on the side of the second inorganic encapsulation layer 43 facing away from the display substrate 10, the acid and alkaline gases generated by the second inorganic encapsulation layer 43 can be further blocked.

[0040] In Figures 5 and 6, the film layer below the polarization functional layer 21 is a film layer disposed facing the display substrate 10, and the film layer above the polarization functional layer 21 is a film layer disposed facing away from the display substrate 10.

[0041] As shown in Figures 5 and 6, when the blocking layer 30 includes a second blocking layer 32, the second blocking layer 32 can include the following two configurations: For example, as shown in Figure 5, the second blocking layer 32 can be a support protective layer 22. The support protective layer 22 can serve as a protective structure for the polarization functional layer 21, and can also serve as a blocking structure to prevent the diffusion of residual acid and alkali gases in the encapsulation layer 40 and the inorganic material layer in the display substrate 10 to the polarization functional layer 21, thereby simplifying the preparation process of the polarization layer 20, reducing the preparation cost of the polarization layer 20, and the support protective layer 22 is closer to the polarization functional layer 21, thereby better protecting the polarization functional layer 21 and further improving the reliability of the polarization layer. It is understood that the support protective layer 22 has two layers. One support protective layer 22 (such as the first support protective layer 221) is located between the display substrate 10 and the polarization functional layer 21, and the other support protective layer 22 (such as the second support protective layer 222) is located on the side of the polarization functional layer 21 facing away from the display substrate 10. The second blocking layer 32 can be the first support protective layer 221, and the second blocking layer 32 can also be disposed between the first support protective layer 221 and the polarization functional layer 21.

[0042] For example, as shown in FIG6, the second barrier layer 32 is disposed between the support protection layer 22 and the polarization functional layer 21. The second barrier layer 32 can block the acid and alkaline gases remaining in the support protection layer 22 and the inorganic material layer on the side of the support protection layer 22 facing away from the polarization layer 20, thereby reducing the possibility of the acid and alkaline gases remaining in the inorganic material layer in the display substrate 10 and the encapsulation layer 40 diffusing across the second barrier layer 32 to the polarization functional layer 21.

[0043] The touch layer 50 includes a touch metal layer 51 and a touch insulating layer 52. The touch metal layer 51 may include a touch electrode layer 511 and a touch bridge layer 512. The touch insulating layer 52 is located between the touch electrode layer 511 and the touch bridge layer 512.

[0044] As shown in Figures 7 and 8, when the barrier layer 30 includes a third barrier layer 33, the third barrier layer 33 can include the following two configuration methods: For example, as shown in Figure 7, the third barrier layer 33 can be a touch insulating layer 52. The touch insulating layer 52 can serve as an insulating layer between the touch metal layers 51, and can also serve as a barrier structure to prevent the diffusion of residual acid and alkali gases in the inorganic material layer within the encapsulation layer 40 and the display substrate 10 to the polarization functional layer 21, thereby simplifying the overall manufacturing process of the display panel and reducing the manufacturing cost of the display panel.

[0045] For example, as shown in FIG8, the third barrier layer 33 is located between the touch insulating layer 52 and the polarizing layer 20. The third barrier layer 33 can block the residual acid and alkaline gases in the touch insulating layer 52 and the inorganic material layer on the side of the touch insulating layer 52 facing away from the polarizing layer 20, thereby reducing the possibility of the residual acid and alkaline gases in the organic material layer in the display substrate 10, the encapsulation layer 40 and the touch layer 50 diffusing across the third barrier layer 33 to the polarizing functional layer 21. Specifically, the third barrier layer 33 may be located between the touch insulating layer 52 and the touch bridge layer 512, or the third barrier layer 33 may be located between the touch bridge layer 512 and the polarizing layer 20.

[0046] In some examples, the barrier layer 30 may include a first barrier layer 31, a second barrier layer 32, and a third barrier layer 33; in other examples, the barrier layer 30 may include only one of the first barrier layer 31, the second barrier layer 32, and the third barrier layer 33; in still other examples, the barrier layer 30 may include only any two of the first barrier layer 31, the second barrier layer 32, and the third barrier layer 33.

[0047] Combining the above embodiments, it is beneficial to improve the design flexibility of the blocking layer 30, increase the arrangement range of the blocking layer 30, further reduce the possibility of the polarization functional layer 21 in the polarization layer 20 being corroded by acid and alkali gases remaining in the preparation process of the display substrate 10 and other film layers, and improve the reliability of the polarization layer 20.

[0048] In one possible implementation, the material of the barrier layer 30 includes an inorganic material, and at least a portion of the material of the first inorganic encapsulation layer 41 is different from the material of the barrier layer 30.

[0049] Optionally, the first inorganic encapsulation layer 41 can be formed by mixing silicon nitride and silicon oxide in a specific ratio. The material of the barrier layer 30 may include silicon oxide. The first inorganic encapsulation layer 41 requires NH3 as a raw material during its preparation, and NH3 will remain within the first inorganic encapsulation layer 41; the barrier layer 30 can block NH3. Furthermore, in some high-temperature and high-humidity environments (e.g., during screen reliability testing), silicon nitride will decompose into NH3, which will produce NH4 upon contact with moisture in the environment. + Barrier layer 30 can also block NH4 + This reduces the possibility of residual acidic gas or generated alkaline gas diffusing into the polarization functional layer 21 and causing discoloration of the polarization layer 20.

[0050] Optionally, the materials of the barrier layer 30 and the first inorganic encapsulation layer 41 can be completely different materials, resulting in differences in the lattice structure, grain size, defect type, and density of the two films. When acid or alkali gases diffuse from the first layer to the interface between the two layers, they encounter a "mismatch" interface. Acid or alkali gases are unlikely to find the same or similar fast diffusion channels in another material with completely different structure and chemical properties. This interface forces the gas to change its diffusion path, greatly increasing its diffusion resistance, or even completely blocking its path. Part of the material used to prepare the first inorganic encapsulation layer 41 can be the same as the material used to prepare the barrier layer 30, making the materials used in the preparation of the two films interchangeable, reducing the introduction of new materials, and thus reducing R&D costs, production costs, and equipment complexity.

[0051] In one feasible implementation, the barrier layer 30 includes a host layer 30a, the material of which is silicon oxide.

[0052] Silicon oxide (SiO2) has excellent resistance to common acid and alkali gases (such as HCl and NH3 that may remain in the first inorganic encapsulation layer 41, CO2 and a small amount of acid vapor in the external environment). Silicon oxide does not easily react chemically with these gases. As the main layer 30a, it can build a "basic acid and alkali barrier" over a large area, reducing the probability of acid and alkali gas penetration. At the same time, silicon oxide has high transparency, which reduces the refraction or absorption of light emitted by organic light-emitting units, thereby improving the luminous efficiency and display effect of the display panel.

[0053] Optionally, the host layer 30a can be an undoped, dense silicon oxide layer.

[0054] In one feasible implementation, the bulk density of the main layer 30a is greater than the bulk density of the inorganic material layer.

[0055] Volumetric density, also known as apparent density, refers to the mass per unit volume of a material in its natural state (including internal pores and gaps, but excluding external open voids). The higher the volumetric density, the fewer pores (closed pores and tiny gaps) there are inside the material, resulting in a longer path and fewer channels for gases (water, oxygen, acids, and alkalis) to pass through.

[0056] Optionally, the polarization functional layer 21 is projected onto the display substrate 10 within the projection of the main body layer 30a onto the display substrate 10.

[0057] In the above embodiments, by setting the bulk density of the main body layer 30a to be greater than the bulk density of the inorganic material layer in the display substrate, it is beneficial to reduce the gas permeability, reduce the possibility of acid and alkali gases intruding into the main body layer 30a, improve the ability of the main body layer 30a to block acid and alkali gases, and at the same time improve the impact resistance and friction resistance of the main body layer 30a, and reduce the possibility of cracks appearing in the main body layer 30a under external force.

[0058] Optionally, the bulk density of the main layer 30a can be obtained by measuring according to GB / T 4516-2017.

[0059] Figure 9 is a schematic cross-sectional view of a barrier layer in a display panel (Figure 10 ...

[0060] In one feasible implementation, as shown in Figures 9 and 10, the material of the barrier layer 30 further includes a conjugate acid-base pair.

[0061] It is understandable that the "conjugate acid-base pair" in the barrier layer 30 is not simply a theoretical chemical concept, but rather a combination of "weak acidic substance + weak basic substance," which can be incorporated into the barrier layer 30 as an additive. For example, the conjugate acid-base pair can serve as a core, incorporated in the form of a solidified buffer system. The core conjugate pair of such a buffer system can come from acetic acid + sodium acetate (the core being CH3COOH-CH3COO). - Phosphoric acid + sodium dihydrogen phosphate (the core is H3PO4-H2PO4) - Composite materials such as acetic acid and sodium acetate, or other weak acid-base combinations that meet the condition of differing by only one proton, can be used. The corresponding buffer systems can be acetic acid + sodium acetate buffer systems, phosphoric acid + sodium dihydrogen phosphate buffer systems, or other suitable combinations of buffer systems.

[0062] In the above embodiment, the conjugate acid-base pair in the barrier layer 30 can neutralize acid and alkaline gases. For example, if an acidic gas (e.g., HCl) penetrates the pores of the barrier layer 30 (e.g., silica), the weak base component in the conjugate acid-base pair will react with the acidic gas to produce a stable solid salt, which will not decompose into harmful gases and will not corrode the barrier layer 30 or the polarization functional layer 21. If a weak alkaline gas (e.g., NH3) penetrates the pores of the barrier layer 30 (e.g., silica), the weak acid component in the conjugate acid-base pair will react with the alkaline gas to produce a neutral salt, which will not continue to corrode the barrier layer 30 or the polarization functional layer 21. The combination of "weak acidic substance + weak alkaline substance" in the conjugate acid-base pair can absorb both acidic and alkaline gases, further improving the barrier effect of the barrier layer 30.

[0063] In one feasible implementation, as shown in FIG9, the barrier layer 30 further includes a plurality of absorbent portions 30b located within the main body layer 30a. The absorbent portions 30b include a semi-permeable layer, which forms a receiving space, and a conjugate acid-base pair is disposed in the receiving space.

[0064] Alternatively, the material of the semipermeable layer may include cellulose acetate or polymers. The semipermeable membrane allows small molecules to pass through the semipermeable layer while blocking large molecules.

[0065] For example, the conjugate acid-base pair is encapsulated within an independent containment space formed by the semi-permeable layer, reducing the likelihood of free aggregation and formation of large-sized particles in the main body layer 30a. This reduces the possibility of light scattering caused by the large-sized particles and improves the light transmittance of the barrier layer 30. Furthermore, the semi-permeable nature of the semi-permeable layer (allowing small-molecule acid-base gases to pass through while preventing leakage of conjugate acid-base pair particles) enables unidirectional passage. Acid-base gases can penetrate the semi-permeable layer into the containment space and fully react with the internal conjugate acid-base pair, while the conjugate acid-base pair cannot seep out. This reduces the risk of corrosion of the main body layer 30a or other membrane layers due to direct contact between the conjugate acid-base pair and other membrane layers.

[0066] Optionally, the density of the buffer system with conjugate acid-base pairs as the core in multiple absorber sections 30b can be the same. Of course, the density of the buffer system with conjugate acid-base pairs as the core in some of the multiple absorber sections 30b can be different.

[0067] Optionally, the absorber portion 30b can be uniformly dispersed within the main body layer 30a. Alternatively, the display panel includes a display area and a non-display area, the main body layer 30a covers the display area and the non-display area, and the absorber portion 30b can be disposed only in the display area; of course, the absorber portion 30b can also be disposed in the non-display area. Optionally, the density of the absorber portion 30b disposed in the display area is greater than or equal to the density of the absorber portion 30b disposed in the non-display area.

[0068] In one feasible implementation, as shown in FIG10, the barrier layer 30 includes multiple main layers 30a and an absorbent layer 30c located between two adjacent main layers 30a, wherein the material of the absorbent layer 30c includes a conjugate acid-base pair.

[0069] Optionally, the number of main body layers 30a may include two or more layers. When the main body layers 30a include two layers, an absorber layer 30c is provided between the two main body layers 30a. When the main body layers 30a include two or more layers, an absorber layer 30c is provided between adjacent main body layers 30a. For example, the main body layers 30a may have three layers, namely a first main body layer, a second main body layer, and a third main body layer. The absorber layers 30c may have two layers, namely a first absorber layer and a second absorber layer. A first absorber layer is provided between the first main body layer and the second main body layer, and a second absorber layer is provided between the second main body layer and the third main body layer. The conjugate acid-base pairs included in the first absorber layer and the second absorber layer may be the same or different. Optionally, at least a portion of the main body layers 30a in the multilayer main body layers 30a may be made of the same inorganic material or different inorganic materials.

[0070] In the above embodiment, the main body layer 30a serves to physically block water, oxygen, and acid / alkali gases, as well as provide structural support, while the absorber layer 30c is used to chemically neutralize these gases. The nanoscale pinholes in the multi-layered main body layer 30a are difficult to align perfectly (equivalent to staggered peak blocking), requiring water, oxygen, and acid / alkali gases to bypass them, resulting in longer paths and a lower probability of penetration into the main body layer 30a. The absorber layer 30c is a continuous film, increasing the contact area with the two main body layers 30a and reducing the likelihood of acid / alkali gases diffusing from other directions and penetrating the main body layer 30a to reach the polarization functional layer 21.

[0071] Figure 11 is a schematic diagram of a cross-sectional structure of a display panel.

[0072] In one feasible embodiment, as shown in FIG11, the display substrate includes an array substrate and a light-emitting layer. The array substrate includes a substrate and a driving device layer; the substrate includes at least one supporting functional layer; the driving device layer is located on one side of the substrate and includes multiple conductive layers and interlayer insulating layers located between adjacent conductive layers. The light-emitting layer is located on one side of the array substrate and includes a pixel defining layer and a plurality of organic light-emitting units. The pixel defining layer includes a pixel defining portion and a plurality of pixel openings formed by the pixel defining portions, and at least a portion of the organic light-emitting units is disposed within the pixel openings. The inorganic material layer includes at least one of the supporting functional layer, the interlayer insulating layer, and the pixel defining layer.

[0073] Exemplarily, the array substrate 11 includes a substrate 111 and a driving device layer 112 located on one side of the substrate 111. The substrate 111 may include one or more supporting functional layers. For example, two supporting functional layers are formed by two polyimide layers, and a buffer layer may be disposed between the two polyimide layers. The driving device layer 112 includes multiple conductive layers, which form driving devices such as transistors and capacitors. The transistors include a source / drain 1121, a gate 1122, an active layer 1123, and a light-shielding layer 1124. The source / drain 1121 is located on the same layer and on the side of the gate 1122 facing away from the substrate 111. The gate 1122 is located on the side of the active layer 1123 facing away from the substrate 111, and the active layer 1123 is located on the side of the light-shielding layer 1124 facing away from the substrate 111. An interlayer insulating layer is provided between adjacent conductive layers. Optionally, the light-shielding layer 1124 may be electrically connected to the source or drain. A first electrode layer is disposed on the side of the driving device layer 112 away from the substrate 111. The first electrode layer may include a plurality of first electrodes disposed at intervals. The organic light-emitting unit 121 includes the first electrode layer and the organic light-emitting unit 121 corresponds one-to-one with the first electrode.

[0074] For example, the organic light-emitting unit 121 further includes an organic light-emitting layer located on the side of the first electrode facing away from the array substrate 11 and a second electrode located on the side of the organic light-emitting layer facing away from the array substrate 11.

[0075] The light-emitting layer includes a pixel definition layer and an organic light-emitting layer, with the organic light-emitting layer located within a pixel opening of the pixel definition layer. Optionally, one or more organic light-emitting layers may be disposed within a pixel opening. The organic light-emitting layer located within a pixel opening, along with the first electrode and the second electrode corresponding to the organic light-emitting layer within the pixel opening, together form an organic light-emitting unit.

[0076] In some examples, the inorganic material layer includes a supporting functional layer, and a barrier layer capable of blocking residual acid or alkaline gases in the supporting functional layer as well as acid or alkaline gases diffused after the decomposition of the supporting functional layer. In some examples, the inorganic material layer includes an interlayer insulating layer, and a barrier layer capable of blocking residual acid or alkaline gases in the interlayer insulating layer as well as acid or alkaline gases diffused after the decomposition of the interlayer insulating layer. In some examples, the inorganic material layer includes a pixel definition layer, and a barrier layer capable of blocking residual acid or alkaline gases in the pixel definition layer as well as acid or alkaline gases diffused after the decomposition of the pixel definition layer.

[0077] In the above embodiments, the barrier layer can specifically block inorganic material layers that are prone to residual acid and alkali gases and those that are prone to decomposition of acid and alkali gases. At the same time, by increasing the blocking range of the barrier layer, the possibility of the polarization functional layer being degraded after being contaminated by acid and alkali gases is further reduced, thereby improving the reliability of the polarization layer.

[0078] Figure 12 is a schematic diagram of a display device.

[0079] As shown in Figure 12, based on the inventive concept of the foregoing embodiments, this disclosure also provides a display device 100, which includes a display panel using the foregoing embodiments. The display device 100 can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.

[0080] In the description of this specification, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0081] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, "multiple" means two or more, unless otherwise explicitly specified.

[0082] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0083] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0084] The foregoing disclosure provides many different implementations or examples for carrying out different structures of this disclosure. To simplify this disclosure, the components and arrangements of specific examples are described above. Of course, these are merely examples and are not intended to limit this disclosure. Furthermore, reference numerals and / or reference letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0085] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this disclosure. Different parts of different embodiments can be combined with each other without conflict, and these should all be covered within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A display panel, characterized in that, include: The display substrate includes at least one inorganic material layer; A polarizing layer is located on one side of the display substrate, the polarizing layer including a polarization functional layer; a blocking layer is disposed at least between the inorganic material layer and the polarization functional layer, the blocking layer being configured to block acid and alkaline gases from diffusing into the polarization functional layer.

2. The display panel according to claim 1, characterized in that, The projection of the blocking layer onto the display substrate covers the projection of the polarizing functional layer onto the display substrate.

3. The display panel according to claim 1, characterized in that, The display panel further includes an encapsulation layer located between the display substrate and the polarizing layer. The encapsulation layer includes a first inorganic encapsulation layer and an organic encapsulation layer stacked sequentially along a direction away from the display substrate. The blocking layer is disposed between the first inorganic encapsulation layer and the polarizing functional layer.

4. The display panel according to claim 3, characterized in that, The encapsulation layer further includes a second inorganic encapsulation layer located on the side of the organic encapsulation layer facing away from the display substrate. The barrier layer includes a first barrier layer, which includes the second inorganic encapsulation layer; or, the first barrier layer is disposed between the second inorganic encapsulation layer and the polarizing layer, and the first barrier layer is in contact with the second inorganic encapsulation layer. And / or, the polarizing layer further includes a support and protective layer, which is disposed on the side of the polarizing functional layer facing the display substrate. The barrier layer includes a second barrier layer, which includes the support and protective layer; or, the second barrier layer is disposed between the support and protective layer and the polarizing functional layer. And / or, the display panel further includes a touch layer, which is located between the encapsulation layer and the polarizing layer. The touch layer includes a touch metal layer and a touch insulating layer. The barrier layer includes a third barrier layer, which includes the touch insulating layer; or, the third barrier layer is located between the touch insulating layer and the polarizing layer.

5. The display panel according to claim 3, characterized in that, The barrier layer is made of inorganic materials, and at least a portion of the material of the first inorganic encapsulation layer is different from the material of the barrier layer.

6. The display panel according to any one of claims 1 to 5, characterized in that, The barrier layer includes a host layer, the material of which is silicon oxide.

7. The display panel according to claim 6, characterized in that, The bulk density of the main layer is greater than that of the inorganic material layer.

8. The display panel according to claim 6, characterized in that, The material of the barrier layer also includes conjugate acid-base pairs.

9. The display panel according to claim 8, characterized in that, The barrier layer also includes a plurality of absorbent portions located within the main body layer. Each absorbent portion includes a semi-permeable layer that forms a containment space, and the conjugate acid-base pair is disposed in the containment space.

10. The display panel according to claim 8, characterized in that, The barrier layer comprises multiple main layers and an absorbent layer located between two adjacent main layers, wherein the absorbent layer is made of a conjugate acid-base pair.

11. The display panel according to claim 1, characterized in that, The display substrate includes: an array substrate, comprising a substrate and a driving device layer; the substrate includes at least one supporting functional layer; the driving device layer is located on one side of the substrate and includes multiple conductive layers and an interlayer insulating layer located between adjacent conductive layers; a light-emitting layer is located on one side of the array substrate, the light-emitting layer includes a pixel definition layer and a plurality of organic light-emitting units, the pixel definition layer includes a pixel defining portion and a plurality of pixel openings formed by the pixel defining portions, at least a portion of the organic light-emitting units is disposed within the pixel openings; the inorganic material layer includes at least one of the supporting functional layer, the interlayer insulating layer and the pixel definition layer.

12. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 11.

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