Display panel and display device

Abstract

A display panel and a display device, the display panel comprising: a glass substrate (1), the glass substrate (1) being a light emitting side substrate of the display panel; the laminated layer (2) is positioned on the light emitting side of the glass substrate (1); the laminated layer (2) comprises at least one first sub-layer (21) and at least one second sub-layer (22), and the first sub-layers (21) and the second sub-layers (22) are alternately arranged; the refractive indexes of the first sub-layer (21) and the second sub-layer (22) are different; the thickness of the first sub-layer (21) is smaller than that of the second sub-layer (22); the visible light reflectivity of the display panel is smaller than or equal to 1.1%. The display panel is used for preparing a low-reflectivity display product.

Description

Display panel, display device Technical Field

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

[0002] With the continuous development of the display industry and the upgrading of display technology, consumers are placing greater emphasis on the image quality of display products. Therefore, high-definition display products with high resolution, high transmittance, high contrast, and wide color gamut are becoming increasingly popular among consumers.

[0003] At present, when the resolution, transmittance, contrast and color gamut meet the requirements, the reflectivity of the display product becomes an important factor in improving its image quality. When the reflectivity is high, when viewing the display in a scene with strong ambient light, the person or object facing the display surface of the display is easily projected onto the display surface. The image reflected on the display surface will seriously interfere with the display picture and reduce the display effect.

[0004] Summary of the Invention

[0005] The embodiments of this application adopt the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a display panel, comprising:

[0007] A glass substrate, which is a light-emitting side substrate of the display panel;

[0008] a stacking layer located on the light-emitting side of the glass substrate;

[0009] The stacked layer includes at least one first sublayer and at least one second sublayer, the first sublayers and the second sublayers are alternately arranged; the refractive index of the first sublayer is greater than the refractive index of the second sublayer; and the thickness of the first sublayer is less than the thickness of the second sublayer;

[0010] Wherein, the visible light reflectivity of the display panel is less than or equal to 1.1%.

[0011] In at least one embodiment of the present application, the refractive index of the first sub-layer is greater than the refractive index of the glass substrate, and the refractive index of the second sub-layer is less than the refractive index of the glass substrate.

[0012] In at least one embodiment of the present application, the display panel further includes a light-transmitting conductive layer, and the light-transmitting conductive layer is located on a side of the stacked layer away from the glass substrate;

[0013] The refractive index of the light-transmitting conductive layer is greater than the refractive index of the second sub-layer, and the refractive index of the light-transmitting conductive layer is greater than the refractive index of the glass substrate.

[0014] In at least one embodiment of the present application, the thickness of at least a portion of the first sub-layer is less than or equal to the thickness of the light-transmitting conductive layer.

[0015] In at least one embodiment of the present application, the thicknesses of the second sub-layers are equal.

[0016] In at least one embodiment of the present application, the number of the first sub-layers and the second sub-layers is equal, and the number N of the first sub-layers is an even number, the first first sub-layer is in direct contact with the glass substrate, and the Nth second sub-layer is in direct contact with the light-transmitting conductive layer;

[0017] The minimum distance between the surface of the N / 2 second sublayer away from the glass substrate and the glass substrate is smaller than the distance between the surface of the N / 2 second sublayer away from the glass substrate and the light-transmitting conductive layer.

[0018] In at least one embodiment of the present application, the thickness of a first of the first sub-layers is smaller than the thickness of the other first sub-layers.

[0019] In at least one embodiment of the present application, the stacked layer includes two first sublayers and two second sublayers, and the absolute value of the difference between twice the thickness of the first first sublayer and the thickness of the second first sublayer is less than or equal to 4 nm.

[0020] In at least one embodiment of the present application, an absolute value of a difference between a thickness of a first first sub-layer and a thickness of the light-transmitting conductive layer is less than or equal to 6 nm.

[0021] In at least one embodiment of the present application, an absolute value of a difference between thicknesses of the second sub-layers is less than or equal to 12 nm.

[0022] In at least one embodiment of the present application, the refractive index of the first sub-layer is in the range of 1.8 to 2.2; the refractive index of the second sub-layer is in the range of 1.4 to 1.6;

[0023] The material of the first sub-layer includes silicon nitride, and the material of the second sub-layer includes silicon oxide.

[0024] In at least one embodiment of the present application, the display panel further comprises a composite polarizing film, wherein the composite polarizing film is located on a side of the light-transmitting conductive layer away from the stacked layer;

[0025] The composite polarizing film includes a polarizer and a low-reflection layer, wherein the low-reflection layer is located on a side of the polarizer away from the light-transmitting conductive layer.

[0026] In at least one embodiment of the present application, the ratio of the refractive index of air to the refractive index of the low-reflection layer is substantially equal to the ratio of the refractive index of the low-reflection layer to the refractive index of the polarizer.

[0027] In at least one embodiment of the present application, the refractive index of the composite polarizing film is in the range of 1.2 to 1.4.

[0028] In at least one embodiment of the present application, the display panel further includes a color resist layer, the color resist layer is located on a side of the glass substrate away from the stacked layer, the color resist layer includes a black matrix pattern, wherein the refractive index of the black matrix pattern is less than or equal to 1.7.

[0029] In a second aspect, an embodiment of the present application provides a display device, which includes the display panel as described above.

[0030] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0032] FIG1 is a schematic diagram of a partial film layer structure in a display panel provided in an embodiment of the present application;

[0033] Figures 2 to 8 are schematic structural diagrams of stacked layers provided in embodiments of the present application;

[0034] FIG9 is a schematic diagram of a partial film layer structure in another display panel provided by an embodiment of the present application;

[0035] FIG10 is a schematic structural diagram of a composite polarizing film provided in an embodiment of the present application;

[0036] FIG11 is a visible light reflectance curve of a display panel provided in an embodiment of the present application and a display panel in related art;

[0037] FIG12 is a schematic diagram of a partial film layer structure in another display panel provided by an embodiment of the present application;

[0038] FIG13 is an illustration of light reflection away from the composite polarizing film provided in an embodiment of the present application;

[0039] FIG14 is a table showing the structural parameters and reflectivity test results of ten film layer structures provided in the embodiments of the present application. Specific embodiments

[0040] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0041] In the drawings, the thickness of regions and layers may be exaggerated for clarity. The same reference numerals in the drawings represent the same or similar structures, and their detailed descriptions will be omitted. In addition, the drawings are only schematic illustrations of the present application and are not necessarily drawn to scale.

[0042] In the embodiments of the present application, words such as "first", "second", "third", and "fourth" are used to distinguish between identical or similar items with basically the same functions and effects. This is only for the purpose of clearly describing the technical solutions of the embodiments of the present application, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0043] In the embodiments of the present application, the terms "upper" and "lower" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0044] Throughout the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of the present application. Schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be included in any one or more embodiments or examples in any suitable manner.

[0045] In the embodiments of the present application, “a plurality of” means two or more, and “at least one” means one or more, unless otherwise clearly defined.

[0046] The features "parallel," "perpendicular," and "identical" used in the embodiments of the present application include features such as "parallel," "perpendicular," and "identical" in the strict sense, as well as "approximately parallel," "approximately perpendicular," and "approximately identical" that include certain tolerances, taking into account the measurement and tolerances associated with the measurement of a particular quantity (e.g., limitations of the measurement system), and represent within an acceptable range of deviation for a particular value determined by a person of ordinary skill in the art. For example, "approximately" can mean within one or more standard deviations, or within 10% or 5% of the stated value.

[0047] Unless the context requires otherwise, throughout the specification and claims, the term "comprising" is to be construed in an open, inclusive sense, that is, meaning "including, but not limited to."

[0048] In the embodiments of this application, "same layer" refers to the relationship between multiple film layers formed from the same material after the same step (e.g., a one-step patterning process). "Same layer" here does not always mean that the thickness of multiple film layers is the same or the height of multiple film layers in the cross-sectional view is the same. Polygons in this specification are not strictly defined and can be approximate triangles, parallelograms, trapezoids, pentagons, or hexagons, etc., and some small deformations due to tolerances may exist.

[0049] With the continuous development of the display industry and the upgrading of display technology, consumers are placing greater emphasis on display image quality. High-definition displays with high resolution, high transmittance, high contrast, and a wide color gamut have become increasingly popular among consumers. While meeting basic performance requirements, improving image quality is a long-term goal. Ultra-black display has been a hot topic in recent years. "Ultimate Black" refers to the anti-reflection function of the display panel. The weaker the display panel's ability to reflect external light, the better the viewing experience under strong sunlight. In particular, in black images, the weaker the reflectivity, the less interference from external light on the black screen, thus achieving an "ultimate black" display effect.

[0050] Based on this, an embodiment of the present application provides a display panel, which is formed by arranging an overlapping layer on the light-emitting side of the glass substrate of the display panel, and the overlapping layer includes at least one first sublayer and at least one second sublayer, and the first sublayer and the second sublayer are arranged alternately; the refractive index of the first sublayer is greater than the refractive index of the second sublayer; the thickness of the first sublayer is less than the thickness of the second sublayer; in this way, the display panel has an extremely low reflectivity, wherein the visible light reflectivity of the display panel is less than or equal to 1.1%, thereby achieving an "extreme black" display effect.

[0051] The display panel provided by the embodiments of the present application will be specifically explained and illustrated below with reference to the accompanying drawings.

[0052] An embodiment of the present application provides a display panel, as shown in FIG1 , comprising: a glass substrate 1, which is a light-emitting side substrate of the display panel; and an overlay layer 2, which is located on the light-emitting side of the glass substrate 1. FIG1 only schematically illustrates a partial film layer structure in the display panel.

[0053] As shown in FIG2 to FIG9 , the stacked layer 2 includes at least one first sublayer 21 and at least one second sublayer 22, and the first sublayers 21 and the second sublayers 22 are alternately arranged; the refractive index of the first sublayer 21 is greater than the refractive index of the second sublayer 22; and the thickness of the first sublayer 21 is less than the thickness of the second sublayer 22;

[0054] Wherein, the visible light reflectivity of the display panel is less than or equal to 1.1%.

[0055] In an exemplary embodiment, the display panel may be a liquid crystal display panel (LCD); the liquid crystal display panel may be a TN (Twisted Nematic) type, a VA (Vertical Alignment) type, an IPS (In-Plane Switching) type, or an ADS (Advanced Super Dimension Switch) type liquid crystal display panel.

[0056] The liquid crystal display panel may include a color filter substrate and an array substrate that are arranged opposite to each other, and may also include a liquid crystal layer located between the color filter substrate and the array substrate; of course, it may also include other structures such as a driving circuit.

[0057] Among them, the color filter substrate is the light-emitting side substrate of the liquid crystal display panel, and the color filter substrate and the array substrate both include a glass substrate. The glass substrate of the array substrate is the light-incident side substrate of the liquid crystal display panel, and the glass substrate of the color filter substrate is the light-emitting side substrate of the liquid crystal display panel; that is, the light emitted by the backlight source of the liquid crystal display panel first passes through the glass substrate of the array substrate and enters the liquid crystal display panel, and then passes through the array substrate, the liquid crystal layer and the color filter substrate in sequence, and is emitted from the glass substrate of the color filter substrate; the above-mentioned glass substrate 1 provided in the embodiment of the present application refers to the glass substrate of the color filter substrate.

[0058] Exemplarily, the material of the glass substrate 1 is optical glass.

[0059] For example, the thickness of the glass substrate 1 may be approximately 0.5 mm, 1 mm, 1.2 to 1.5 mm, or 2 mm. The specific thickness may be determined according to the design of the product and is not limited here.

[0060] Exemplarily, the stacked layer 2 includes at least one first sublayer 21 and at least one second sublayer 22, that is, the stacked layer 2 includes at least two sublayers;

[0061] Here, there is no limitation on whether the number of the first sub-layers 21 and the second sub-layers 22 included in the stacked layer 2 is equal;

[0062] As shown in FIG4 and FIG5 , the number of the first sub-layers 21 may be equal to the number of the second sub-layers 22 ;

[0063] For example, as shown in FIG2 and FIG6 , the number of the first sub-layers 21 may be greater than the number of the second sub-layers 22 ;

[0064] For example, as shown in FIG3 and FIG7 , the number of the first sub-layers 21 may be smaller than the number of the second sub-layers 22 ;

[0065] For example, the stacked layer 2 includes three first sub-layers 21 and two second sub-layers 22;

[0066] For another example, the stacked layer 2 includes two first sub-layers 21 and two second sub-layers 22;

[0067] For another example, the stacked layer 2 may include two first sub-layers 21 and three second sub-layers 22;

[0068] For another example, the stacked layer 2 includes one first sub-layer 21 and two second sub-layers 22;

[0069] It should be noted that, in actual applications, the more sub-layers the stacking layer 2 includes, the more significant the refractive effect of the interface is, and the better the effect of reducing the reflection effect is; however, considering the limitations of the difficulty of the preparation process and the factors that excessive thickness reduces the lightness and aesthetics of the display panel, the number of sub-layers included in the stacking layer 2 can be set to 3-8 layers.

[0070] In an exemplary embodiment, the stacked layer 2 includes two light-transmitting materials; exemplary light-transmitting materials may include organic light-transmitting materials and / or inorganic light-transmitting materials.

[0071] The thickness of the stacked layer 2 is not limited here. When the thicknesses of the first sub-layer 21 and the second sub-layer are determined, the thickness of the stacked layer 2 can be determined according to the number of sub-layers it includes.

[0072] In an exemplary embodiment, when the stacked layer 2 includes a plurality of first sub-layers 21 and a plurality of second sub-layers 22, whether the thicknesses of the plurality of first sub-layers 21 are equal and whether the thicknesses of the plurality of second sub-layers 22 are equal is not limited; wherein, a plurality refers to at least two;

[0073] Exemplarily, some first sub-layers 21 have the same thickness, and some first sub-layers 21 have different thicknesses; exemplary, the thicknesses of all first sub-layers 21 are not equal; exemplary, the thicknesses of all second sub-layers 21 are equal;

[0074] Exemplarily, some second sub-layers 22 have the same thickness, and some second sub-layers 22 have different thicknesses; exemplary, the thicknesses of the second sub-layers 22 are not equal; exemplary, the thicknesses of the second sub-layers 22 are equal.

[0075] In an exemplary embodiment, the refractive index of the first sublayer 21 is greater than that of the second sublayer 22 , and the thickness of the first sublayer 21 is less than that of the second sublayer 22 ; that is, the thickness of the sublayer with a larger refractive index is set to be smaller.

[0076] The fact that the thickness of the first sub-layer 21 is smaller than the thickness of the second sub-layer 22 means that the thickness of all the first sub-layers 21 is smaller than the thickness of any one of the second sub-layers 22 .

[0077] The visible light reflectivity of the display panel is less than or equal to 1.1%, wherein the visible light reflectivity refers to the proportion of light reflected by the display panel to the total amount of external light irradiating the display panel.

[0078] Exemplarily, the visible light reflectivity of the display panel is less than or equal to 1.0%. For example, the visible light reflectivity of the display panel may be 0.99%, 0.98%, 0.97%, 0.96%, 0.95%, 0.93%, 0.92%, 0.90%, 0.88%, or 0.85%.

[0079] In the display panel provided in the embodiment of the present application, an overlay layer 2 is arranged on the light-emitting side of the glass substrate 1 of the display panel, and the overlay layer 2 includes at least one first sublayer 21 and at least one second sublayer 22, and the first sublayer 21 and the second sublayer 22 are arranged alternately; the refractive index of the first sublayer 21 is greater than the refractive index of the second sublayer 22; the thickness of the first sublayer 21 is less than the thickness of the second sublayer 22; in this way, external light is refracted and scattered at the interface between the first sublayer 21 and the second sublayer 22, which reduces the probability of reflection and thus reduces the amount of reflected light emitted, so that the display panel has an extremely low reflectivity, wherein the visible light reflectivity of the display panel is less than or equal to 1.1%, thereby being able to achieve an "extreme black" display effect.

[0080] In at least one embodiment of the present application, as shown in FIG1 , the refractive index of the first sublayer 21 is greater than that of the glass substrate 1 , and the refractive index of the second sublayer 22 is less than that of the glass substrate 1 .

[0081] That is, the refractive index of the second sublayer 22 is smaller than that of the glass substrate 1 , and the refractive index of the glass substrate 1 is smaller than that of the first sublayer 21 ; that is, the refractive index of the glass substrate 1 is between the refractive indices of the first sublayer 21 and the second sublayer 22 .

[0082] In at least one embodiment of the present application, as shown in FIG9 , the display panel further includes a light-transmitting conductive layer 3 , which is located on a side of the stacked layer 2 away from the glass substrate 1 ;

[0083] The refractive index of the light-transmitting conductive layer 3 is greater than the refractive index of the second sub-layer 22 , and the refractive index of the light-transmitting conductive layer 3 is greater than the refractive index of the glass substrate 1 .

[0084] In an exemplary embodiment, the material of the light-transmitting conductive layer 3 may include a metal oxide, such as indium tin oxide (ITO) or indium zinc oxide (IZO);

[0085] Static electricity is easily generated during the transportation of the display panel or when the protective film of the display panel is torn off. Static electricity can damage the structural components of the display panel. By providing a transparent conductive layer 3 on the side of the stacked layer 2 away from the glass substrate 1, the static electricity on the display panel can be released to a large extent, thereby reducing the probability of damage to the display panel due to static electricity.

[0086] In some embodiments, the refractive index of the light-transmitting conductive layer 3 is substantially equal to the refractive index of the first sub-layer 21. "Substantially equal" means that the absolute value of the difference between the two refractive indices is less than or equal to 0.25. For example, the absolute value of the difference between the two refractive indices is 0.02, 0.04, 0.1, 0.05, 0.2, or 0.25.

[0087] In some embodiments, the refractive index of the light-transmitting conductive layer 3 is smaller than the refractive index of the first sub-layer 21 .

[0088] In an embodiment of the present application, by setting the refractive index of the transparent conductive layer 3 to be greater than the refractive index of the second sub-layer 22, and the refractive index of the transparent conductive layer 3 to be greater than the refractive index of the glass substrate 1, and the refractive index of the transparent conductive layer 3 to be less than the refractive index of the first sub-layer 21, the probability of reflection is reduced, thereby reducing the amount of reflected light emitted, so that the display panel has an extremely low reflectivity, wherein the visible light reflectivity of the display panel is less than or equal to 1.1%, thereby being able to achieve an "extreme black" display effect.

[0089] It should be noted that, in the refractive index data of the stacked layer 2, the light-transmitting conductive layer 3 and the glass substrate 1 provided in the embodiments of the present application, the refractive index refers to the refractive index data at a wavelength of 550 nm.

[0090] The structure of the display panel shown in FIG1 is used below to illustrate the principle of reducing reflectivity by the stacked layer 1. In FIG1 , the thickness of the first sub-layer 21 is The thickness of the first second sub-layer 22 is The thickness of the second first sub-layer 21 is The thickness of the second sub-layer 22 is Take this as an example to illustrate.

[0091] When external light irradiates the display panel, the light reflected by the surface of the transparent conductive layer 3 is R1, the light reflected by the interface between the second second sub-layer 22 and the transparent conductive layer 3 is R2, the light reflected by the interface between the second first sub-layer 21 and the second second sub-layer 22 is R3, the light reflected by the interface between the first second sub-layer 22 and the second first sub-layer 21 is R4, the light reflected by the interface between the first first sub-layer 21 and the first second sub-layer 22 is R5, and the light reflected by the interface between the glass substrate 1 and the first first sub-layer 21 is R6. On the one hand, after the stacking layer 2 is set, the film layers are On the other hand, by setting the refractive index relationship among the first sub-layer 21, the second sub-layer 22, the glass substrate 1, and the light-transmitting conductive layer 3, and then configuring the thickness relationship between the first sub-layer 21 and the second sub-layer 22, at least part of the reflected light R1, R2, R3, R4, R5 and R6 has the same amplitude, a phase difference of half a wavelength, and a comparable light intensity. This part of the light undergoes a destructive effect (i.e., the light waves interfere destructively), thereby further reducing the amount of reflected light emitted and reducing the reflectivity of the display panel.

[0092] In at least one embodiment of the present application, as shown in FIG. 2 , FIG. 4 , and FIG. 5 to FIG. 8 , the thickness of at least a portion of the first sub-layer 21 is less than or equal to the thickness of the light-transmitting conductive layer 3 .

[0093] The thickness of at least part of the first sub-layer 21 is less than or equal to the thickness of the light-transmitting conductive layer 3, including but not limited to the following situations:

[0094] First, the thickness of a portion of the first sub-layer 21 is less than or equal to the thickness of the light-transmitting conductive layer 3;

[0095] For example, the thickness of a portion of the first sub-layer 21 is less than the thickness of the light-transmitting conductive layer 3 , and the thickness of a portion of the first sub-layer 21 is substantially equal to the thickness of the light-transmitting conductive layer 3 ;

[0096] For another example, the thickness of part of the first sub-layer 21 is less than the thickness of the light-transmitting conductive layer 3 , and the thickness of part of the first sub-layer 21 is greater than the thickness of the light-transmitting conductive layer 3 ;

[0097] For another example, the thickness of part of the first sub-layer 21 is substantially equal to the thickness of the light-transmitting conductive layer 3 , and the thickness of part of the first sub-layer 21 is greater than the thickness of the light-transmitting conductive layer 3 ;

[0098] Second, the thickness of all first sub-layers 21 is less than or equal to the thickness of the light-transmitting conductive layer 3 .

[0099] In at least one embodiment of the present application, the thicknesses of the second sub-layers 22 are equal.

[0100] In at least one embodiment of the present application, the number of first sub-layers 21 and the number of second sub-layers 22 are equal, and the number N of first sub-layers is an even number, the first first sub-layer 21 is in direct contact with the glass substrate 1, and the Nth second sub-layer 22 is in direct contact with the light-transmitting conductive layer 3; wherein, the minimum distance between the surface of the N / 2th second sub-layer 22 away from the glass substrate 1 and the glass substrate 1 is less than the distance between the surface of the N / 2th second sub-layer 22 away from the glass substrate 1 and the light-transmitting conductive layer 3.

[0101] For example, as shown in Figure 8, the number of first sub-layers 21 and second sub-layers 22 is equal, and the number of first sub-layers is 2, the first first sub-layer 21 is in direct contact with the glass substrate 1, and the second second sub-layer 22 is in direct contact with the light-transmitting conductive layer 3; wherein, the minimum distance D1 between the surface of the first second sub-layer 22 away from the glass substrate 1 and the glass substrate 1 is smaller than the distance D2 between the surface of the first second sub-layer 22 away from the glass substrate 1 and the light-transmitting conductive layer 3.

[0102] For example, as shown in FIG8 , the number of the first sub-layers 21 and the second sub-layers 22 are equal, and the number of the first sub-layers is 2. As shown in the parameters of case 1 to case 6 in FIG14 , the thickness of the first first sub-layer 21 is less than twice the thickness of the light-transmitting conductive layer 3 ;

[0103] Furthermore, as shown in the parameters of case 1, case 3 to case 5 in FIG14 , the thickness of the first sub-layer 21 is less than or equal to the thickness of the light-transmitting conductive layer 3 ;

[0104] Exemplarily, the thickness range of the first sublayer 21 can be set to 9 to 22 nm, for example, the thickness of the first sublayer 21 is set to 10 nm, 11 nm, 12 nm, 13 nm, 14 nm, 15 nm, 16 nm, 17 nm, 18 nm, 19 nm, 20 nm, or 21 nm.

[0105] In the embodiment of the present application, by setting the minimum distance between the surface of the N / 2 second sub-layer 22 away from the glass substrate 1 and the glass substrate 1 to be smaller than the distance between the surface of the N / 2 second sub-layer 22 away from the glass substrate 1 and the light-transmitting conductive layer 3, the thickness of the first first sub-layer 21 is smaller than the thicknesses of the other first sub-layers 21. This can further promote the destructive interaction of light (i.e., destructive interference of light waves), thereby further reducing the amount of reflected light emitted and lowering the visible light reflectivity of the display panel.

[0106] In at least one embodiment of the present application, the stacked layer 2 includes two first sublayers 21 and two second sublayers 22, and the absolute value of the difference between twice the thickness of the first first sublayer 21 and the thickness of the second first sublayer 21 is less than or equal to 4 nm.

[0107] For example, according to the parameters of case 1 to case 6 shown in FIG14 , the thickness of the first sub-layer 21 can be set to 14±1 nm, 18.2±1 nm, 12±1 nm, 10±1 nm, 12±1 nm, and 20±1 nm;

[0108] For example, according to the parameters of case 1 to case 6 shown in FIG14 , the thickness of the second first sublayer 21 can be set to 30±2nm, 35.9±2nm, 26.5±2nm, 22±2nm, 22.5±2nm, and 30±2nm; for example, the thickness of the second first sublayer 21 can be set to 30±1nm, 35.9±1nm, 26.5±1nm, 22±12nm, 22.5±1nm, and 30±1nm;

[0109] Exemplarily, the absolute value of the difference between twice the thickness of the first sublayer 21 and the thickness of the second first sublayer 21 is less than or equal to 4 nm, 3.5 nm, 3 nm, 2.5 nm, 2 nm, 1.5 nm, 1 nm, 0.5 nm, or 0 nm.

[0110] 14 is described by taking the case where the first sub-layer 21 is silicon nitride (SiNx) and the second sub-layer 22 is silicon oxide (SiO2) as an example;

[0111] In at least one embodiment of the present application, as shown in the parameters of case 1 to case 6 in FIG. 14 , the absolute value of the difference between the thickness of the first sub-layer 21 and the thickness of the light-transmitting conductive layer 3 is less than or equal to 6 nm.

[0112] For example, according to the parameters of case 1 to case 6 shown in FIG. 14 , the thickness of the light-transmitting conductive layer 3 can be set to be in the range of 13 to 17 nm, for example, 14 nm, 15 nm, or 16 nm.

[0113] Illustratively, the absolute value of the difference between the thickness of the first sublayer 21 and the thickness of the light-transmitting conductive layer 3 is less than or equal to 6nm, 5.5nm, 5nm, 4.5nm, 4nm, 3.5nm, 3nm, 2.5nm, 2nm, 1.5nm, 1nm, 0.5nm, or 0nm.

[0114] In at least one embodiment of the present application, the absolute value of the difference between the thicknesses of the second sub-layers 22 is less than or equal to 12 nm.

[0115] Exemplarily, the absolute value of the difference between the thicknesses of the second sub-layers 22 is less than or equal to 12 nm, 11 nm, 10 nm, 9 nm, 8 nm, 7 nm, 6 nm, 5 nm, 4 nm, 3 nm, 2 nm, 1 nm, or 0 nm.

[0116] In at least one embodiment of the present application, the refractive index of the first sublayer 21 ranges from 1.8 to 2.2; the refractive index of the second sublayer 22 ranges from 1.4 to 1.6; the material of the first sublayer 21 includes silicon nitride, and the material of the second sublayer 22 includes silicon oxide.

[0117] It should be noted that the refractive indices of the above-mentioned first sub-layer 21 and second sub-layer 22 refer to the refractive index data at a wavelength of 550nm; in actual applications, according to the measurement process fluctuations of the measuring equipment, according to the film quality differences between the first sub-layer 21 and the second sub-layer 22 during film formation, according to the difference in the ratio of silicon to nitrogen in silicon nitride, and according to the difference in the ratio of silicon to oxygen, the refractive index range of the first sub-layer 21 can be controlled to be 1.8~2.2; the refractive index range of the second sub-layer 22 is 1.4~1.6; in this way, combined with the setting of the alternating arrangement of the first sub-layer 21 and the second sub-layer 22 and the configuration of their film thicknesses in the previous article, a display panel with a visible light reflectivity lower than 1.1% can be obtained.

[0118] It should also be noted that Figure 14 shows the reflectivity data obtained by testing under the relationship between different film layer thicknesses. For example, the reflectivity data of case 1-case 7 were obtained by testing under the simple structure of glass substrate / overlay layer / transparent conductive layer (ITO); the reflectivity in the Glass column is the reflectivity of only the tested glass substrate, and the reflectivity in the ITO153 and ITO140 columns is the reflectivity of only the tested transparent conductive layer.

[0119] In at least one embodiment of the present application, as shown in FIG9 , the display panel further includes a composite polarizing film 4 , which is located on a side of the light-transmitting conductive layer 3 away from the stacked layer 2 ;

[0120] As shown in FIG10 , the composite polarizing film 4 includes a polarizer 41 and a low-reflection layer 42 . The low-reflection layer 42 is located on a side of the polarizer 41 away from the light-transmitting conductive layer 3 .

[0121] In the embodiment of the present application, by providing the composite polarizing film 4 including the polarizer 41 and the low-reflection layer 42 , the reflectivity of the polarizer can be further reduced, and the visible light reflectivity of the display panel can be further reduced.

[0122] Exemplarily, the composite polarizing film 4 further includes an adhesive layer 43 , wherein the material of the adhesive layer 43 may include a pressure-sensitive adhesive (PSA).

[0123] In at least one embodiment of the present application, as shown in Figure 13, the ratio of the refractive index n1 of air Air to the refractive index n2 of the low-reflection layer 42 is approximately equal to the ratio of the refractive index n2 of the low-reflection layer 42 to the refractive index n3 of the polarizer 41, that is, n1 / n2≈n2 / n3.

[0124] The ratio of the refractive index n1 of the air Air to the refractive index n2 of the low-reflection layer 42 is substantially equal to the ratio of the refractive index n2 of the low-reflection layer 42 to the refractive index n3 of the polarizer 41, including but not limited to the following cases:

[0125] First, the ratio of the refractive index n1 of the air Air to the refractive index n2 of the low-reflection layer 42 is equal to the ratio of the refractive index n2 of the low-reflection layer 42 to the refractive index n3 of the polarizer 41;

[0126] Second, the difference between the ratio of the refractive index n1 of air Air to the refractive index n2 of the low-reflection layer 42 and the ratio of the refractive index n2 of the low-reflection layer 42 to the refractive index n3 of the polarizer 41 is less than or equal to 5% of the ratio of the refractive index n1 of air Air to the refractive index n2 of the low-reflection layer 42.

[0127] For example, the difference is less than or equal to 5%, 4%, 3%, 2%, or 1% of the ratio of the refractive index n1 of air Air to the refractive index n2 of the low-reflection layer 42 .

[0128] Third, the difference between the ratio of the refractive index n1 of air Air to the refractive index n2 of the low-reflection layer 42 and the ratio of the refractive index n2 of the low-reflection layer 42 to the refractive index n3 of the polarizer 41 is less than or equal to 5% of the ratio of the refractive index n2 of the low-reflection layer 42 to the refractive index n3 of the polarizer 41.

[0129] For example, the difference is less than or equal to 5%, 4%, 3%, 2%, or 1% of the ratio of the refractive index n2 of the low-reflection layer 42 to the refractive index n3 of the polarizer 41 .

[0130] For example, since n1 / n2≈n2 / n3, n1=1, then (n2) 2 ≈n1*n3≈n3.

[0131] Exemplarily, the polarizer 41 includes polarizing PVA and protective layers TAC located on both sides of the polarizing PVA; PVA is polyvinyl alcohol, and TAC is triacetate film.

[0132] In at least one embodiment of the present application, the refractive index of the composite polarizing film 4 is in the range of 1.2 to 1.4.

[0133] For example, the refractive index of the composite polarizing film 4 may be 1.25, 1.3, or 1.35.

[0134] For example, by providing the low-reflection layer 42 , the refractive index of the composite polarizing film 4 can be reduced, thereby reducing the reflection effect between the transparent conductive layer 3 and the composite polarizing film 4 as shown in FIG. 9 , and further reducing the visible light reflectivity of the display panel.

[0135] 13 , the principle by which the composite polarizing film 4 reduces the reflectivity of the display panel is described. Light A is reflected from the interface between the air and the low-reflection layer 42, and light B is reflected from the interface between the low-reflection layer 42 and the polarizer 41. When the amplitudes of the reflected lights A and B are the same, the intensities are comparable, and the phases differ by half a wavelength, the reflected lights will cancel each other out, thereby achieving the purpose of reducing the reflectivity.

[0136] In at least one embodiment of the present application, as shown in Figure 12, the display panel further includes a color resist layer 6, which is located on the side of the glass substrate 1 away from the stacking layer 2, and the color resist layer 6 includes a black matrix pattern BM, wherein the refractive index of the black matrix pattern BM is less than or equal to 1.7.

[0137] Exemplarily, the visible light reflectivity of the black matrix pattern is less than or equal to 4.9%;

[0138] Exemplarily, the visible light reflectivity of the black matrix pattern is less than or equal to 4.7%;

[0139] The visible light reflectivity of the black matrix pattern refers to the visible light reflectivity measured after the black matrix pattern is prepared on the glass substrate 1 .

[0140] Exemplarily, the content of carbon black in the material of the black matrix pattern is less than or equal to 80% of the total material, and the thickness of the black matrix pattern is greater than or equal to 1.5 μm.

[0141] Exemplarily, the materials of the black matrix pattern include carbon black, resin and low refractive index additives; wherein the refractive index additives may include micro-nano microspheres, microspheres with hollow structures, and microspheres with pits or voids on the surface. By adding refractive index additives, the scattering effect of the black matrix pattern on light can be increased, thereby reducing the reflectivity of the black matrix pattern to visible light.

[0142] In an exemplary embodiment, as shown in FIG12 , the display panel further includes a light-entering side polarizer 9, a light-entering side substrate 8, and a liquid crystal layer 7; of course, the display panel also includes other structures and components, and only the structures related to the invention are introduced here. The other structures included in the display panel can be obtained according to the existing technology or common knowledge, and will not be repeated here.

[0143] FIG11 shows a reflectivity curve of a display panel to visible light in a related art (marked Ref.) and a reflectivity curve of a display panel to visible light provided by an embodiment of the present application. Obviously, the reflectivity of the display panel provided by the embodiment of the present application is significantly reduced.

[0144] An embodiment of the present application provides a display device, wherein the display device includes the display panel as described above.

[0145] The specific structure of the display panel can be found in the previous description and will not be repeated here.

[0146] The display device may be a liquid crystal display device, which may be a TN (Twisted Nematic) type, VA (Vertical Alignment) type, IPS (In-Plane Switching) type, or ADS (Advanced Super Dimension Switch) type liquid crystal display device.

[0147] The display device can be a display device such as an LCD display, as well as any product or component with a display function, such as a television, a digital camera, a mobile phone, a tablet computer, etc. that includes these display devices.

[0148] In the display device provided in the embodiment of the present application, an overlay layer 2 is arranged on the light-emitting side of the glass substrate 1 of the display panel, and the overlay layer 2 includes at least one first sublayer 21 and at least one second sublayer 22, and the first sublayer 21 and the second sublayer 22 are arranged alternately; the refractive index of the first sublayer 21 is greater than the refractive index of the second sublayer 22; the thickness of the first sublayer 21 is less than the thickness of the second sublayer 22; in this way, external light is refracted and scattered at the interface between the first sublayer 21 and the second sublayer 22, which reduces the probability of reflection, thereby reducing the amount of reflected light emitted, so that the display panel has an extremely low reflectivity, wherein the visible light reflectivity of the display panel is less than or equal to 1.1%, thereby being able to achieve an "extreme black" display effect.

[0149] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A display panel, wherein: include: A glass substrate, wherein the glass substrate is a light-emitting side substrate of the display panel; A stacking layer, located on the light-emitting side of the glass substrate; The stacked layer includes at least one first sublayer and at least one second sublayer, the first sublayers and the second sublayers are arranged alternately; the refractive index of the first sublayer is greater than the refractive index of the second sublayer; the thickness of the first sublayer is less than the thickness of the second sublayer; Wherein, the visible light reflectivity of the display panel is less than or equal to 1.1%.

2. The display panel according to claim 1, wherein: The refractive index of the first sub-layer is greater than the refractive index of the glass substrate, and the refractive index of the second sub-layer is less than the refractive index of the glass substrate.

3. The display panel according to claim 2, wherein: The display panel further comprises a light-transmitting conductive layer, wherein the light-transmitting conductive layer is located on a side of the stacked layer away from the glass substrate; The refractive index of the light-transmitting conductive layer is greater than the refractive index of the second sub-layer, and the refractive index of the light-transmitting conductive layer is greater than the refractive index of the glass substrate.

4. The display panel according to claim 3, wherein: The thickness of at least a portion of the first sub-layer is less than or equal to the thickness of the light-transmitting conductive layer.

5. The display panel according to claim 3, wherein: The thickness of each of the second sub-layers is equal.

6. The display panel according to claim 3, wherein: The number of the first sublayers is equal to the number of the second sublayers, and the number N of the first sublayers is an even number, the first first sublayer is in direct contact with the glass substrate, and the Nth second sublayer is in direct contact with the light-transmitting conductive layer; The minimum distance between the surface of the N / 2 second sublayer away from the glass substrate and the glass substrate is smaller than the distance between the surface of the N / 2 second sublayer away from the glass substrate and the light-transmitting conductive layer.

7. The display panel according to claim 6, wherein: The thickness of a first first sub-layer is smaller than the thickness of the other first sub-layers.

8. The display panel according to claim 6, wherein: The stacked layer includes two first sub-layers and two second sub-layers, and an absolute value of a difference between twice the thickness of a first first sub-layer and the thickness of a second first sub-layer is less than or equal to 4 nm.

9. The display panel according to claim 6, wherein: An absolute value of a difference between a thickness of the first sub-layer and a thickness of the light-transmitting conductive layer is less than or equal to 6 nm.

10. The display panel according to claim 3, wherein: An absolute value of a difference between thicknesses of the second sub-layers is less than or equal to 12 nm.

11. The display panel according to any one of claims 1 to 10, wherein: The refractive index of the first sublayer ranges from 1.8 to 2.2; the refractive index of the second sublayer ranges from 1.4 to 1.6; The material of the first sub-layer includes silicon nitride, and the material of the second sub-layer includes silicon oxide.

12. The display panel according to claim 3, wherein: The display panel further comprises a composite polarizing film, and the composite polarizing film is located on a side of the light-transmitting conductive layer away from the stacked layer; The composite polarizing film comprises a polarizer and a low-reflection layer, wherein the low-reflection layer is located on a side of the polarizer away from the light-transmitting conductive layer.

13. The display panel according to claim 12, wherein: The ratio of the refractive index of air to the refractive index of the low-reflection layer is substantially equal to the ratio of the refractive index of the low-reflection layer to the refractive index of the polarizer.

14. The display panel according to claim 12, wherein: The refractive index of the composite polarizing film is in the range of 1.2 to 1.

4.

15. The display panel according to claim 1, wherein: The display panel further includes a color resist layer, the color resist layer is located on a side of the glass substrate away from the stacked layer, the color resist layer includes a black matrix pattern, wherein the refractive index of the black matrix pattern is less than or equal to 1.

7.

16. A display device, wherein: Comprising the display panel as claimed in any one of claims 1 to 15.

Images