Display panel and display device

Abstract

Provided are a display panel and a display device. The display panel comprises a light-emitting substrate, and a color filter layer, a lens layer and a light-transmitting selection layer which are arranged on the light exit side of the light-emitting substrate. The color filter layer comprises a plurality of filter units, and the lens layer comprises a plurality of lens units. The orthographic projection of one lens unit on the light-emitting substrate overlaps with the orthographic projection of at least one filter unit on the light-emitting substrate. The light-transmitting selection layer is located on the surface of the side of the lens layer away from the color filter layer. The orthographic projection of the light-transmitting selection layer on the light-emitting substrate includes the orthographic projections of the plurality of lens units on the light-emitting substrate.

Description

Display panel and display device

[0001] This application claims priority to Chinese patent application No. 202510377849.9, filed on March 27, 2025, entitled “Display Panel and Display Device”, the contents of which are to be understood as incorporated herein by reference. Technical Field

[0002] This article relates to, but is not limited to, the field of display technology, and in particular to a display panel and display device. Background Technology

[0003] Light-emitting diodes (LEDs) are widely used in various fields such as indicators, decorations, automotive lighting, and augmented reality (AR) applications—products requiring high brightness and often operating in harsh outdoor environments—due to their advantages including high brightness, high reliability, adjustable color temperature, environmental friendliness, long lifespan, and low power consumption. Organic light-emitting diodes (OLEDs) and quantum dot light-emitting diodes (QLEDs) are active-matrix display devices, offering advantages such as self-illumination, wide viewing angle, high contrast, low power consumption, extremely high response speed, thinness, flexibility, and low cost. Summary of the Invention

[0004] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.

[0005] This application provides a display panel and a display device.

[0006] On one hand, this embodiment provides a display panel, including: a light-emitting substrate, a color filter layer, a lens layer, and a light-selective layer disposed on the light-emitting side of the light-emitting substrate. The color filter layer includes multiple filter units, and the lens layer includes multiple lens units. The orthographic projection of one lens unit onto the light-emitting substrate overlaps with the orthographic projection of at least one filter unit onto the light-emitting substrate. The light-selective layer is located on the surface of the lens layer away from the color filter layer. The orthographic projection of the light-selective layer onto the light-emitting substrate covers the orthographic projections of the multiple lens units onto the light-emitting substrate.

[0007] In some exemplary embodiments, the thickness of the light-transmitting selective layer that overlaps with the lens layer is less than the thickness of the light-transmitting selective layer between adjacent lens units.

[0008] In some exemplary embodiments, the distance between the light-transmitting selective layer and the lens layer is smaller than the distance between adjacent lens units.

[0009] In some exemplary embodiments, the light-transmitting selective layer includes a first functional layer and a second functional layer, wherein the second functional layer is located on the side of the first functional layer away from the lens layer, and the material of the first functional layer is different from the material of the second functional layer.

[0010] In some exemplary embodiments, the material of the first functional layer includes at least one of the following: polyvinylidene fluoride (PVDF) and polyethylene (PE).

[0011] In some exemplary embodiments, the display panel further includes an adhesive layer located on the side of the light-transmitting selective layer away from the lens layer, wherein the refractive index of the light-transmitting selective layer is less than the refractive index of the adhesive layer.

[0012] In some exemplary embodiments, the display panel further includes a light-absorbing layer located on the side of the light-transmitting selective layer away from the lens layer, configured to absorb light rays incident on the lens layer from the side away from the light-emitting substrate.

[0013] In some exemplary embodiments, the thickness of the light-absorbing layer is less than the thickness of the light-selective layer.

[0014] In some exemplary embodiments, the orthogonal projection of the light-absorbing layer onto the light-emitting substrate is located within the orthogonal projection range of the light-transmitting selective layer onto the light-emitting substrate.

[0015] In some exemplary embodiments, the light-transmitting selection layer includes: a plurality of first light-transmitting portions, wherein the orthographic projection of a first light-transmitting portion onto the light-emitting substrate includes the orthographic projection of a lens unit onto the light-emitting substrate; and the minimum spacing between adjacent first light-transmitting portions is greater than 0.

[0016] In some exemplary embodiments, the minimum spacing between adjacent lens units is greater than 0; the light-transmitting selection layer further includes: a second light-transmitting portion, the second light-transmitting portion being connected to an adjacent first light-transmitting portion, and the orthogonal projection of the second light-transmitting portion onto the light-emitting substrate covering the spacing between adjacent lens units.

[0017] In some exemplary embodiments, adjacent filter units are in direct contact.

[0018] In some exemplary embodiments, the plurality of filter units of the color filter layer includes: a first filter unit, a second filter unit and a third filter unit arranged periodically, wherein the edge of the second filter unit overlaps with the edge of the adjacent first filter unit and the edge of the adjacent third filter unit in the orthographic projection of the light-emitting substrate.

[0019] In some exemplary embodiments, the display panel includes a display area and a border area; the light-emitting substrate includes a metal trace layer located in the border area, and the light-transmitting selective layer covers the orthogonal projection of the metal trace layer on the light-emitting substrate.

[0020] In some exemplary embodiments, the thickness of the light-transmitting selection layer located in the border area is greater than the thickness of the light-transmitting selection layer located in the display area.

[0021] In some exemplary embodiments, the light-emitting substrate includes a driving backplate and a light-emitting structure disposed on the driving backplate. The light-emitting structure includes a plurality of light-emitting elements, and the plurality of light-emitting elements correspond one-to-one with the plurality of filter units.

[0022] In some exemplary embodiments, the driving backplane is a silicon-based substrate that integrates multiple pixel circuits, which are electrically connected to multiple light-emitting elements.

[0023] In some exemplary embodiments, the lens unit is a convex lens that protrudes in a direction away from the light-emitting substrate.

[0024] On the other hand, this embodiment provides a display device, including the display panel as described above.

[0025] Other features and advantages of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the application. Other advantages of this application can be realized and obtained by means of the embodiments described in the description and the accompanying drawings.

[0026] Overview of the attached figures

[0027] The accompanying drawings are used to provide an understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0028] Figure 1 is a schematic diagram of the structure of a display panel according to at least one embodiment of the present disclosure;

[0029] Figure 2 is a schematic diagram of light emission from a display panel without a light-transmitting selection layer;

[0030] Figures 3A and 3B are comparison diagrams of the display effect of the display panel;

[0031] Figure 4 is another structural schematic diagram of a display panel according to at least one embodiment of the present disclosure;

[0032] Figure 5 is another structural schematic diagram of a display panel according to at least one embodiment of the present disclosure;

[0033] Figure 6 is a schematic diagram of light emission from a display panel without a light-transmitting selection layer;

[0034] Figure 7 is another structural schematic diagram of a display panel according to at least one embodiment of the present disclosure;

[0035] Figure 8 is a plan view of a display panel according to at least one embodiment of the present disclosure;

[0036] Figure 9 is a partial cross-sectional structural diagram of a display panel according to at least one embodiment of the present disclosure;

[0037] Figure 10 is a schematic diagram of a display device according to at least one embodiment of the present disclosure.

[0038] Detailed Explanation

[0039] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. The implementation can be carried out in many different forms. Those skilled in the art will readily understand that the methods and content can be transformed into other forms without departing from the spirit and scope of this disclosure. Therefore, this disclosure should not be construed as limited to the content described in the following embodiments. Unless otherwise specified, the embodiments and features in the embodiments of this disclosure can be arbitrarily combined with each other.

[0040] In the accompanying drawings, the size of one or more constituent elements, the thickness of layers, or areas are sometimes exaggerated for clarity. Therefore, this disclosure is not necessarily limited to these dimensions, and the shape and size of one or more parts in the drawings do not reflect true proportions. Furthermore, the drawings schematically illustrate ideal examples, and this disclosure is not limited to the shapes or values ​​shown in the drawings.

[0041] The ordinal numbers such as "first," "second," and "third" used in this specification are used to avoid confusion among the constituent elements, not to limit the quantity. The term "multiple" in this disclosure refers to two or more quantities.

[0042] In this specification, for convenience, terms such as "middle," "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are used to indicate orientation or positional relationships in conjunction with the accompanying drawings. This is solely for the purpose of facilitating the description and simplification, and does not imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this disclosure. The positional relationships of the constituent elements may be appropriately varied depending on the orientation of the constituent elements being described. Therefore, the use of terms not limited to those described in the specification may be appropriately replaced as needed.

[0043] In this specification, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "coupling" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or link; a direct connection, an indirect connection via an intermediate component, or a connection within two components. Those skilled in the art will understand the meaning of these terms in this disclosure as appropriate. "Connection" can include "electrical connection," which can include situations where constituent elements are connected together by a component having some electrical function. There are no particular limitations on the term "component having some electrical function," as long as it allows for the transmission of electrical signals between the connected constituent elements. Examples of "component having some electrical function" include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, and other multifunctional components.

[0044] In this specification, a transistor is a device that includes at least three terminals: a gate (gate electrode), a drain, and a source. A transistor has a channel region between its drain (drain electrode terminal, drain region, or drain electrode) and its source (source electrode terminal, source region, or source electrode), and current can flow through the drain, the channel region, and the source. In this specification, the channel region refers to the region through which current primarily flows.

[0045] In this specification, the first terminal can be the drain and the second terminal can be the source, or vice versa. Additionally, the gate can also be called the control terminal. In cases where transistors with opposite polarities are used or where the current direction changes during circuit operation, the functions of the "source" and "drain" are sometimes interchanged. Therefore, in this specification, the "source" and "drain" can be interchanged.

[0046] In this specification, "the orthographic projection of A includes the orthographic projection of B" means that the boundary of the orthographic projection of B falls within the boundary of the orthographic projection of A, or that the boundary of the orthographic projection of A overlaps with the boundary of the orthographic projection of B. The "shape of A" as used in this disclosure refers to the shape of the orthographic projection of A onto the substrate.

[0047] In this specification, "approximately" and "about" mean without strictly defined limits, allowing for errors in the process and measurement. In this disclosure, "same" includes values ​​differing by less than 10%, such as values ​​differing by less than 5%.

[0048] In some implementations, OLEDs use white light emission and three-color filters to achieve color, specifically by fabricating RGB three-color filter films behind the white light device. Due to the interaction between pixels of different colors or the inhomogeneity of the light-emitting materials, color distortion or color concatenation may occur, affecting the display effect. Furthermore, in display products that include lens units, light leakage may occur between adjacent lens units, making it easy for ring halos to appear around the pixels, affecting the accuracy and quality of the displayed image.

[0049] This embodiment provides a display panel and display device that can improve poor display conditions caused by color bleeding, light leakage, etc.

[0050] This embodiment provides a display panel, including: a light-emitting substrate, and a color filter layer, a lens layer, and a light-selective layer disposed on the light-emitting side of the light-emitting substrate. The color filter layer includes multiple filter units. The lens layer is located on the side of the color filter layer away from the light-emitting substrate and includes multiple lens units, wherein the orthographic projection of one lens unit onto the light-emitting substrate overlaps with the orthographic projection of at least one filter unit onto the light-emitting substrate. The light-selective layer is located on the surface of the lens layer away from the color filter layer, and the orthographic projection of the light-selective layer onto the light-emitting substrate includes the orthographic projections of the multiple lens units onto the light-emitting substrate.

[0051] In this example, the light-selective layer can be configured to allow light emitted from the lens layer to pass through and reflect light emitted from the side away from the light-emitting substrate toward the transmission layer. Here, light emitted from the lens layer refers to light emitted from the color filter layer and emitted to the outside after passing through the lens layer. Light emitted from the side away from the light-emitting substrate toward the lens layer refers to light emitted from the side away from the light-emitting substrate toward the surface of the lens layer away from the color filter layer, and may include light emitted from the outside toward the lens layer, or light emitted from the gap between adjacent lens units and toward the surface of the lens layer away from the color filter layer.

[0052] The display panel provided in this embodiment has a lens unit with a light-transmitting selective layer covering the lens layer, which can control the light emission path of the light-emitting substrate, thereby improving the risk of color crosstalk in the display panel, increasing the color gamut and light emission efficiency of the display panel, and thus improving the accuracy and quality of graphic display.

[0053] In some exemplary embodiments, the thickness of the light-selective layer overlapping the lens layer is less than the thickness of the light-selective layer between adjacent lens units. This example can improve light transmittance.

[0054] In some exemplary embodiments, the distance between the light-selective layer and the lens layer is less than the distance between adjacent lens units. Specifically, the distance between the light-selective layer and the lens layer can refer to the minimum distance between the surface of the light-selective layer away from the light-emitting substrate and the surface of the lens layer away from the light-emitting substrate. This example can improve the effect of preventing color bleeding.

[0055] In some exemplary embodiments, the display panel may further include a light-absorbing layer located on the side of the light-transmitting selective layer away from the lens layer. The light-absorbing layer may be configured to absorb light incident on the lens layer from the side away from the light-emitting substrate. In some examples, the thickness of the light-absorbing layer may be less than the thickness of the light-transmitting selective layer. The orthographic projection of the light-absorbing layer onto the light-emitting substrate may be within the orthographic projection range of the light-transmitting selective layer onto the light-emitting substrate. This example, by absorbing the scattered light or external light from the lens layer through the light-absorbing layer, can improve the risk of color crosstalk in the display panel, thereby increasing the color purity of the monochromatic emitted light.

[0056] In some exemplary embodiments, the display panel may further include an adhesive layer located on the side of the light-transmitting selective layer away from the lens layer, wherein the refractive index of the light-transmitting selective layer may be less than the refractive index of the adhesive layer. In this example, the light-transmitting selective layer may perform total internal reflection on light incident from the adhesive layer side, thereby preventing crosstalk between different monochromatic lights and improving the color purity of the monochromatic output light.

[0057] The following examples illustrate the solution of this embodiment.

[0058] Figure 1 is a structural schematic diagram of a display panel according to at least one embodiment of the present disclosure. Figure 2 is a schematic diagram of light emission from a display panel without a light-selective layer. Figures 3A and 3B are comparison diagrams of the display effects of the display panels. Figure 3A shows the display effect of a display panel with a light-selective layer; Figure 3B shows the display effect of a display panel without a light-selective layer. The dashed arrows in Figures 1 and 2 indicate the light direction of the display panel.

[0059] In some examples, as shown in Figure 1, the display panel may include a display area and a bezel area. In a direction perpendicular to the display panel, the display area may include: a light-emitting substrate 10, and a color filter layer 21, a lens layer 31, a light-selective layer 32, and a light-absorbing layer 33 disposed on the light-emitting side of the light-emitting substrate 10. The color filter layer 21, lens layer 31, light-selective layer 32, and light-absorbing layer 33 may be sequentially disposed along a direction away from the light-emitting substrate 10. A leveling (CT) layer 30 may be disposed between the color filter layer 21 and the lens layer 31. The leveling layer 30 may be an organic insulating layer; the leveling layer 30 helps ensure the flatness of the lens layer 31.

[0060] In some examples, the color filter layer 31 includes multiple filter units. These multiple filter units may include a first filter unit 211, a second filter unit 212, and a third filter unit 213 arranged periodically within the display area. For example, in the direction from the border area to the display area, they are arranged in the order of the third filter unit 213, the first filter unit 211, and the second filter unit 212 within each period. The embodiments of this disclosure do not limit the arrangement order of the multiple filter units within each period. For example, in the direction from the border area to the display area, they may be arranged in the order of the first filter unit 211, the third filter unit 213, and the second filter unit 212 within each period.

[0061] In some examples, the first filter unit 211 may be a filter unit that only allows light of a first color (e.g., red light) to pass through (e.g., a red filter unit), the second filter unit 212 may be a filter unit that only allows light of a second color (e.g., green light) to pass through (e.g., a green filter unit), and the third filter unit 213 may be a filter unit that only allows light of a third color (e.g., blue light) to pass through (e.g., a blue filter unit). The light-emitting substrate 10 may include a plurality of light-emitting elements that emit white light, and the plurality of filter units may correspond to the plurality of light-emitting elements, for example, in a one-to-one correspondence. For example, the orthographic projection of a filter unit onto the light-emitting substrate may include the orthographic projection of a light-emitting element onto the light-emitting substrate.

[0062] In some examples, the dimensions of multiple filter units may be the same. However, this disclosure is not limiting in this regard. In other examples, when the multiple filter units include a blue filter unit, a green filter unit, and a red filter unit, the size of the blue filter unit may be larger than the size of the red filter unit, the size of the red filter unit may be larger than the size of the green filter unit, or the size of the blue filter unit may be larger than the size of the green filter unit, and the size of the green filter unit may be equal to the size of the red filter unit. In this example, the size of the filter unit refers to the area of ​​the filter unit projected onto the light-emitting substrate.

[0063] In some examples, adjacent filter units among multiple filter units can be in direct contact. Specifically, the edge of one filter unit can be in direct contact with the edge of an adjacent filter unit. For example, the orthographic projection of the edge of one filter unit onto the light-emitting substrate can overlap with the orthographic projection of the edge of an adjacent filter unit onto the light-emitting substrate. For instance, the edge of the first filter unit 211 can be in direct contact with the edges of the adjacent second filter unit 212 and the adjacent third filter unit 213.

[0064] In some examples, the lens layer 31 may include a plurality of lens units 311. The plurality of lens units 311 may be arranged in an array. The orthographic projection of one lens unit 311 onto the light-emitting substrate 10 may overlap with the orthographic projection of at least one filter unit onto the light-emitting substrate 10. For example, the orthographic projection of one lens unit 311 onto the light-emitting substrate 10 may at least partially overlap with the orthographic projection of a filter unit onto the light-emitting substrate. For instance, the orthographic projection of one lens unit 311 onto the light-emitting substrate 10 may be located within the orthographic projection range of a filter unit onto the light-emitting substrate 10.

[0065] In some examples, the lens unit 311 can be a convex lens protruding away from the light-emitting substrate 10. A convex lens is made based on the principle of light refraction and is thicker in the center and thinner at the edges. A convex lens has the function of converging light rays. The lens unit 311 may include a first surface 3111 on the side closer to the light-emitting substrate 10 and a second surface 3112 on the side farther from the light-emitting substrate 10. The first surface 3111 can be generally planar and can contact the surface of the filler layer 30 away from the light-emitting substrate 10; the second surface 3112 is connected to the first surface 3111 and can be generally an arc surface convex away from the light-emitting substrate 10. The orthographic projection of the first surface 3111 onto the light-emitting substrate 10 may include the orthographic projection of the second surface 3112 onto the light-emitting substrate 10. Light rays emitted from the color filter layer 21 can be converged by sequentially passing through the first surface 3111 and the second surface 3112 of the lens unit 311, which helps to improve the color purity of monochromatic light.

[0066] In some examples, the minimum spacing W1 between adjacent lens units 311 can refer to the minimum distance between the edges of adjacent lens units 311. W1 can be greater than 0. In other words, there is no direct contact between adjacent lens units 311.

[0067] In some examples, the light-selective layer 32 may be located on the surface of the lens layer 31 away from the light-emitting substrate 10. The surface of the light-selective layer 32 near the light-emitting substrate 10 may be in direct contact with the second surface 3112 of the lens unit 311 away from the light-emitting substrate 10. The orthographic projection of the light-selective layer 32 onto the light-emitting substrate 10 may include the orthographic projections of multiple lens units 311 onto the light-emitting substrate 10. The light-absorbing layer 33 may be located on the side of the light-selective layer 32 away from the light-emitting substrate 10 and may be in direct contact with the surface of the light-selective layer 32 away from the light-emitting substrate 10.

[0068] In some examples, the thickness of the light-selective layer 32 may be greater than the thickness of the light-absorbing layer 33. In this example, the thickness of the film layer may refer to the vertical distance between the surface of the film layer away from the light-emitting substrate 10 and the surface of the film layer near the light-emitting substrate 10.

[0069] In some examples, the light-transmitting selection layer 32 is divided according to its coverage area in the display area. The light-transmitting selection layer 32 may include multiple first light-transmitting portions 321 and second light-transmitting portions 322. The orthographic projection of a first light-transmitting portion 321 onto the light-emitting substrate 10 may include the orthographic projection of a lens unit 311 onto the light-emitting substrate 10. The first light-transmitting portion 321 may cover the second surface 3112 of the lens unit 311 away from the light-emitting substrate 10 and be in direct contact with the second surface 3112. The second light-transmitting portion 322 may connect to adjacent first light-transmitting portions 321. The orthographic projection of the second light-transmitting portion 322 onto the light-emitting substrate 10 may cover the gap between at least two adjacent lens units 311. The first light-transmitting portions 321 and the second light-transmitting portions 322 may be an integral structure. The minimum distance W2 between adjacent first light-transmitting portions 321 may be greater than 0. In other words, adjacent first light-transmitting portions 321 are not in direct contact. W2 may be less than W1. In other words, the first light-transmitting portion 321 can be the portion of the light-transmitting selective layer 32 that covers the lens unit 311, and the second light-transmitting portion 322 can be the portion of the light-transmitting selective layer 32 that covers the gap between the lens units 311.

[0070] In some examples, the thickness W3 of the light-transmitting selective layer 32 that overlaps with the lens layer 31 can be less than the thickness W4 of the light-transmitting selective layer 32 between adjacent lens units 311. The thickness W3 can be the thickness of the first light-transmitting portion 321, and the thickness W4 can be the thickness of the second light-transmitting portion 322.

[0071] In some examples, the distance between the light-transmitting selective layer 32 and the lens layer 31 can be the thickness W3 of the first light-transmitting portion 32 of the light-transmitting selective layer 32; the distance between the light-transmitting selective layer 32 and the lens layer 31 can be less than the distance between adjacent lens units 311, that is, W3 can be less than W1, thereby improving the anti-crosstalk effect.

[0072] In some examples, the thickness of the multiple first light-transmitting portions 321 can be the same. For instance, if the transmittance of the light-selecting layer 32 for the first, second, and third colors of light is different, and the transmittance of the light-selecting layer 32 for the second color of light is greater than that for the first color of light, and also greater than that for the third color of light, then the thickness of the multiple first light-transmitting portions 321 of the light-selecting layer 32 is determined by the thickness required for the second color of light. This example, by designing a uniform thickness for the multiple first light-transmitting portions, simplifies the fabrication process. In other examples, the thickness of the multiple first light-transmitting portions 321 can be different. For example, the thickness of the first light-transmitting portion 321 covering the second filter unit 212 can be greater than the thickness of the first light-transmitting portion 321 covering the first filter unit 211, and also greater than the thickness of the first light-transmitting portion 321 covering the third filter unit 213. This example, by designing a differentiated thickness for the multiple first light-transmitting portions, helps to ensure the light extraction efficiency of different monochromatic lights and improve the color purity of the monochromatic lights.

[0073] In some examples, the thickness of the first light-transmitting portion 321 can be less than or equal to the thickness of the second light-transmitting portion 322. Setting the thickness of the first and second light-transmitting portions to be the same can help simplify the manufacturing process; differentiating the thicknesses of the first and second light-transmitting portions can help improve the light extraction efficiency.

[0074] In some examples, the light-selecting layer 32 may include a first functional layer 323 and a second functional layer 324 in a direction perpendicular to the display panel. The second functional layer 324 may be located on the side of the first functional layer 323 away from the lens layer 31. The second functional layer 324 may be located between the first functional layer 323 and the light-absorbing layer 33. The materials of the second functional layer 324 and the first functional layer 323 may be different. For example, the material of the first functional layer 323 may include polyvinylidene fluoride (PVDF) or polyethylene (PE). The material of the second functional layer 324 may include at least one of the following: organic phosphorescent gain material (OPL) or organic phosphorescent emitting material (OPE). The organic phosphorescent gain material (OPL) may include Nile red used in blue OLEDs, which can block non-primary color light (such as red and green light), thereby reducing blue light crosstalk. The organic phosphorescent emitting material (OPE) can emit primary color light (such as blue light), thereby reducing light leakage of other colors. The first functional layer 323 can serve as the base layer covering the lens layer 31. The first functional layer 323 may not have polarizing properties, or it may have certain polarizing properties. The second functional layer 324 may have a special polarizing function and is uniformly formed by deposition on the first functional layer 323. In some examples, the first functional layer 323 and the second functional layer 324 can be prepared by spin coating or film deposition. This embodiment is not limited to this.

[0075] In some examples, the material of the light-absorbing layer 33 may include at least one of the following: a conjugated organic polymer (COP) or a blue organic light-emitting diode (OLED) material. The conjugated organic polymer can absorb excess colored light (such as blue light), reducing the amount of excess colored light reflected to the eye and thus reducing light leakage. The blue OLED material itself has a high light absorption rate and can effectively absorb excess light, reducing light leakage.

[0076] In some examples, as shown in Figure 2, after the light emitted from the light-emitting substrate 10 is filtered by the color filter layer 21, the light emitted from the gaps between the lens units 311 of the lens layer 31 is prone to multiple light crosstalks between the multiple lens units 311, eventually entering the human eye and easily causing a halo 60 phenomenon around the lens unit 311, as shown in Figure 3A. As shown in Figure 1, after the display panel of this example is provided with the light-transmitting selection layer 32 and the light-absorbing layer 33, the light emitted from the gaps between the lens units 311 of the lens layer 31 is eventually absorbed by the light-absorbing layer 33 provided on the surface of the adjacent lens unit 311, so that the light emitted from the gaps between the lens units 311 cannot be transmitted to the human eye, which can prevent the halo phenomenon around the lens unit 311, as shown in Figure 3B. There is no halo phenomenon around the lens unit 311, which can improve the accuracy and quality of the graphic display of the display panel.

[0077] Figure 4 is another structural schematic diagram of a display panel according to at least one embodiment of the present disclosure. In some examples, as shown in Figure 4, the light-transmitting selective layer 32 of the display panel may include a plurality of first light-transmitting portions 321. The orthogonal projection of the first light-transmitting portion 321 onto the light-emitting substrate 10 may include the orthogonal projection of the lens unit 311 onto the light-emitting substrate 10. The plurality of first light-transmitting portions 321 may be independently arranged. The gaps between the lens units 311 may not be covered by the light-transmitting selective layer 32. The light-absorbing layer 33 may cover the gaps between the plurality of lens units 311 and adjacent lens units 311. The orthogonal projection of the light-absorbing layer 33 onto the light-emitting substrate 10 may cover the orthogonal projections of the plurality of first light-transmitting portions 321 onto the light-emitting substrate 10. In this example, by providing the light-absorbing layer 33 in the gaps between adjacent lens units 311, scattered light scattered by the lens units 311 toward the direction of adjacent lens units can be absorbed, which can improve the display defects caused by light crosstalk and light leakage. The remaining description of the display panel of this example can be referred to the description of the foregoing embodiments, and therefore will not be repeated here.

[0078] Figure 5 is another structural schematic diagram of a display panel according to at least one embodiment of the present disclosure. Figure 6 is a schematic diagram of light emission from a display panel without a light-transmitting selection layer. The dashed arrows in Figures 5 and 6 indicate the direction of light. As shown in Figure 6, when no light-transmitting selection layer is provided, the light emitted from the color filter layer 21 can be focused by the lens unit 311 of the lens layer 31. The scattered light that is not focused will penetrate through the lens unit 311 into the surrounding lens units 311, thereby reducing the color purity of the monochromatic light focused by the surrounding lens units. For example, the light emitted from the second filter unit 212 will penetrate into the lens unit 311 corresponding to the adjacent first filter unit 211, thereby reducing the color purity of the first color light.

[0079] In some examples, as shown in Figure 5, the display area of ​​the display panel may include: a light-emitting substrate 10, and a color filter layer 21, a lens layer 31, a light-selective layer 32, an adhesive layer 34, and a cover plate 35 disposed on the light-emitting side of the light-emitting substrate 10. The light-selective layer 32 is in contact with the surface of the lens layer 31 away from the light-emitting substrate 10. By covering the lens layer 31 with the light-selective layer 32, the light-selective layer 32 can fully transmit the light emitted from the lens unit 311 and perform total internal reflection on the light incident on the lens unit 311. The light emitted from the lens unit 311 refers to the light that is incident on the lens unit 311 from the side of the color filter layer 21, enters from the first surface of the lens unit 311 near the light-emitting substrate 10, and exits from the second surface of the lens unit 311 away from the light-emitting substrate 10. The light incident on the lens unit 311 refers to the light that is incident on the second surface of the lens unit 311 away from the light-emitting substrate 10 from the outside of the lens unit 311.

[0080] In some examples, light rays incident from the adhesive layer 34 onto the second surface of the lens unit 311 undergo total internal reflection at the light-selective layer 32. The refractive index of the light-selective layer 32 can be less than that of the adhesive layer 34, and total internal reflection occurs when the incident angle of the light is greater than or equal to a critical angle, thereby preventing interference from external light rays and light rays exiting from the gap in the lens unit 311 with the monochromatic light converged by the lens unit 311. Here, the critical angle θc = arcsin(n2 / n1), where n1 is the refractive index of the light-selective layer and n2 is the refractive index of the adhesive layer. In some examples, the adhesive layer 34 can be an ultraviolet (UV) curable adhesive.

[0081] In some examples, the material of the light-transmitting selective layer 32 may include organic materials, or it may include inorganic materials. This embodiment is not limited in this respect.

[0082] This example, by setting a light-transmitting selection layer 32, reflects (e.g., total internal reflection) the light incident on the lens layer 31, preventing crosstalk between different monochromatic lights, improving the color purity of the monochromatic light, increasing the light extraction efficiency of the monochromatic light, and expanding the display color gamut. Further descriptions of the display panel in this example can be found in the descriptions of the foregoing embodiments, and will not be repeated here.

[0083] Figure 7 is another structural schematic diagram of a display panel according to at least one embodiment of the present disclosure. In some examples, as shown in Figure 7, the light-transmitting selective layer 32 of the display panel may include a plurality of first light-transmitting portions 321. The orthogonal projection of the first light-transmitting portion 321 onto the light-emitting substrate 10 may include the orthogonal projection of the lens unit 311 onto the light-emitting substrate 10. The plurality of first light-transmitting portions 321 may be independently arranged. The gaps between the lens units 311 may not be covered by the light-transmitting selective layer 32. In this example, the light-transmitting selective layer 32 reflects (e.g., total internal reflection) the light incident on the lens layer 31, which can prevent crosstalk between different monochromatic lights, improve the color purity of monochromatic lights, improve the light extraction efficiency of monochromatic lights, and increase the display color gamut. Further descriptions of the display panel of this example can be found in the description of the foregoing embodiments, and will not be repeated here.

[0084] With technological advancements, LED sizes in some fields are shrinking, reaching the microLED range below 50 micrometers (µm). Micro-OLEDs (Micro Organic Light-Emitting Diodes) are microdisplays that have emerged in recent years, with silicon-based OLEDs being one type. Silicon-based OLEDs not only enable active pixel addressing but also allow for the fabrication of various functional circuits on silicon substrates, including timing control (TCON) circuits and overcurrent protection (OCP) circuits, which helps reduce system size and achieve lightweight design. Silicon-based OLEDs are fabricated using mature complementary metal-oxide-semiconductor (CMOS) integrated circuit technology, offering advantages such as small size, high resolution (PPI), and high refresh rate, and are widely used in near-eye displays for virtual reality (VR) and augmented reality (AR).

[0085] The following example uses a silicon-based OLED display panel for illustration.

[0086] Figure 8 is a plan view of a display panel according to at least one embodiment of the present disclosure. Figure 9 is a partial cross-sectional view of a display panel according to at least one embodiment of the present disclosure. In some examples, as shown in Figure 8, on a plane parallel to the display panel (i.e., the plane defined by the first direction D1 and the second direction D2), the display panel may include: a display area AA and a border area BB located around the display area AA. For example, the display area AA may be rectangular. In other examples, the display area AA may be a rounded rectangle, a circle, or other shapes, without limitation. The border area BB may include a metal trace layer, and the metal trace layer may include a cathode ring 51. The cathode ring 51 may be disposed around the display area AA.

[0087] In some examples, the light-emitting substrate 10 may include a driving backplane and a light-emitting structure disposed on the driving backplane. The driving backplane may be a silicon substrate 100, which may also be referred to as an IC wafer, and may integrate multiple pixel circuits that generate driving signals, a gate driving circuit that generates gate driving signals, and a data driving circuit that generates data signals. The light-emitting structure may include a pixel definition layer 15 and multiple light-emitting elements. The multiple light-emitting elements are connected to the multiple pixel circuits, for example, in a one-to-one correspondence. The light-emitting elements may include an anode 11, an organic light-emitting layer 12, and a cathode 13. The anode 11 may be connected to the pixel circuits integrated within the silicon substrate 100. The organic light-emitting layer 12 may be sandwiched between the anode 11 and the cathode 13. The pixel definition layer 15 may have multiple pixel openings in the display area AA, and the organic light-emitting layer 12 of the light-emitting element may contact the surface of the anode 11 exposed by the pixel openings. The anode 11 and the cathode 13 may be made of metallic materials.

[0088] In some examples, the cathode ring 51 located in the frame region BB can be connected to the corresponding signal trace within the silicon substrate 100 via the connecting electrode 52. The connecting electrode 52 and the anode 11 of the light-emitting element can be in the same layer.

[0089] In some examples, an encapsulation layer 14 can be disposed on the side of the light-emitting structure away from the silicon substrate 100. For example, the encapsulation layer 14 may include a first encapsulation layer, a second encapsulation layer, and a third encapsulation layer stacked together. The first and third encapsulation layers may be made of inorganic materials, while the second encapsulation layer may be made of organic materials. The second encapsulation layer may be disposed between the first and third encapsulation layers to prevent external moisture from entering the light-emitting element. However, this embodiment is not limited to this. For example, the encapsulation layer may employ a five-layer stacked structure of inorganic / organic / inorganic / organic / inorganic.

[0090] In some examples, the color filter layer 21 may be located on the side of the encapsulation structure layer 14 away from the silicon substrate 100. The orthogonal projection of a single filter unit of the color filter layer 21 onto the light-emitting substrate may cover the orthogonal projection of a light-emitting element onto the light-emitting substrate. For example, the light-emitting element of the light-emitting substrate may be configured to emit white light.

[0091] In some examples, the light-transmitting selection layer 32 may include a third light-transmitting portion 323 located in the border region BB. The orthographic projection of the third light-transmitting portion 323 onto the light-emitting substrate may include the orthographic projection of the cathode ring 51 and the connecting electrode 52 connected to the cathode ring 51 onto the light-emitting substrate. The third light-transmitting portion 323 and the first light-transmitting portion 321 of the display region AA may be connected via a second light-transmitting portion 322. Alternatively, the third light-transmitting portion 323 and the first light-transmitting portion 321 of the display region AA may not be connected and may be independently configured.

[0092] In some examples, the thickness of the light-transmitting selection layer 32 located in the border area BB can be greater than the thickness of the light-transmitting selection layer 32 located in the display area AA. For example, the thickness of the third light-transmitting portion 323 can be greater than the thickness of the second light-transmitting portion 322, and greater than the thickness of the first light-transmitting portion 321.

[0093] This example, by setting a light-transmitting selective layer in the bezel area and covering the metal trace layer in the bezel area, can prevent the metal traces in the bezel area from reflecting light, thus reducing the reflection problem in the bezel area. Moreover, compared to using a black matrix to cover the metal trace layer in the bezel area, this example can reduce material costs and improve the problem of black matrix material easily agglomerating and causing pipe blockage. Further descriptions of the display panel in this example can be found in the descriptions of the foregoing embodiments, and will not be repeated here.

[0094] In some exemplary embodiments, the light-emitting substrate may be an OLED substrate. The light-emitting substrate may include a base, and circuit structures, light-emitting structures, and encapsulation structures sequentially disposed on the base. For example, the base may be a rigid base, such as a glass base; or it may be a flexible base, such as one made of an insulating material like resin. In other examples, the base may be a single-layer or multi-layer structure. When the base is a multi-layer structure, inorganic materials such as silicon nitride, silicon oxide, and silicon oxynitride may be disposed in single or multiple layers between the layers. In some examples, the circuit structure may include: a semiconductor layer, a gate metal layer (e.g., including a first gate metal layer and a second gate metal layer), and a source / drain metal layer (e.g., including two or more source / drain metal layers) disposed on the base. An insulating layer may be disposed between the semiconductor layer and adjacent metal layers. An insulating layer may be disposed between adjacent metal layers. The gate metal layer and source / drain metal layer can be made of metallic materials, such as any one or more of silver (Ag), copper (Cu), aluminum (Al), titanium (Ti), and molybdenum (Mo), or alloys of the above metals, such as aluminum-neodymium alloy (AlNd) or molybdenum-niobium alloy (MoNb). They can be single-layer structures or multi-layer composite structures, such as Ti / Al / Ti. The semiconductor layer can be made of amorphous indium gallium zinc oxide (a-IGZO), zinc oxynitride (ZnON), indium zinc tin oxide (IZTO), amorphous silicon (a-Si), polycrystalline silicon (p-Si), hexathiophene, or polythiophene, etc. That is, this disclosure applies to transistors manufactured based on oxide technology, silicon technology, or organic technology. In some examples, the light-emitting structure layer may include a pixel definition layer and multiple light-emitting elements. For example, each light-emitting element may include a stacked first electrode, an organic light-emitting layer, and a second electrode. The first electrode of the light-emitting element can be an anode, and the first electrode can be electrically connected to the corresponding pixel circuit. A pixel definition layer can be disposed on the first electrode. The pixel definition layer can have multiple pixel openings, each pixel opening exposing at least a portion of the surface of a corresponding first electrode. At least a portion of the organic light-emitting layer can be disposed within a pixel opening and connected to the corresponding first electrode 131. The second electrode can be a cathode, disposed on the organic light-emitting layer, and in contact with the organic light-emitting layer. Driven by the first and second electrodes, the organic light-emitting layer can emit light of a corresponding color. An isolation pillar layer can also be disposed on the side of the pixel definition layer away from the substrate. The isolation pillar layer can include multiple isolation pillars (PS).In some examples, the organic light-emitting layer of the light-emitting element may include an emitting layer (EML) and one or more films selected from the following: a hole injection layer (HIL), a hole transport layer (HTL), a hole block layer (HBL), an electron block layer (EBL), an electron injection layer (EIL), and an electron transport layer (ETL). Driven by the voltage of the first and second electrodes, the light-emitting properties of the organic material can be utilized to emit light at the desired grayscale.

[0095] Figure 10 is a schematic diagram of a display device according to at least one embodiment of the present disclosure. In some examples, as shown in Figure 10, the display device 91 may include a display panel 910. The display panel 910 may be a Micro-LED display panel or a Mini-LED display panel. The display device 91 may be a product with image (including static images or dynamic images, wherein the dynamic images may be video) display capabilities, such as those applicable to vehicle displays, vehicle lights, vehicle windows, shopping mall cabinets, augmented reality (AR) devices, virtual reality (VR) devices, etc. However, this embodiment is not limited thereto.

[0096] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0097] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A display panel, comprising: Light-emitting substrate; A color filter layer is disposed on the light-emitting side of the light-emitting substrate and includes multiple filter units; A lens layer is located on the side of the color filter layer away from the light-emitting substrate, and includes multiple lens units, wherein the orthographic projection of one lens unit on the light-emitting substrate overlaps with the orthographic projection of at least one filter unit on the light-emitting substrate. A light-transmitting selective layer is located on the surface of the lens layer on the side away from the color filter layer, and the orthogonal projection of the light-transmitting selective layer onto the light-emitting substrate includes the orthogonal projection of the plurality of lens units onto the light-emitting substrate.

2. The display panel of claim 1, wherein, The thickness of the light-transmitting selective layer that overlaps with the lens layer is less than the thickness of the light-transmitting selective layer between adjacent lens units.

3. The display panel of claim 1, wherein, The distance between the light-transmitting selective layer and the lens layer is less than the distance between adjacent lens units.

4. The display panel of any one of claims 1 to 3, wherein, The light-transmitting selective layer includes a first functional layer and a second functional layer, wherein the second functional layer is located on the side of the first functional layer away from the lens layer, and the material of the first functional layer is different from the material of the second functional layer.

5. The display panel of claim 4, wherein, The material of the first functional layer includes at least one of the following: polyvinylidene fluoride (PVDF) and polyethylene (PE).

6. The display panel of any one of claims 1-5, further comprising: An adhesive layer is located on the side of the light-transmitting selective layer away from the lens layer, and the refractive index of the light-transmitting selective layer is less than the refractive index of the adhesive layer.

7. The display panel of any one of claims 1-6, further comprising: A light-absorbing layer is located on the side of the light-transmitting selective layer away from the lens layer, and is configured to absorb light rays incident on the lens layer from the side away from the light-emitting substrate.

8. The display panel of claim 7, wherein, The thickness of the light-absorbing layer is less than the thickness of the light-selective layer.

9. The display panel of claim 7, wherein, The light-absorbing layer is projected onto the light-emitting substrate in the same direction as the light-transmitting selective layer in the same direction as the light-emitting substrate.

10. The display panel of any one of claims 1 to 9, wherein, The light-transmitting selective layer includes: a plurality of first light-transmitting portions, wherein the orthographic projection of a first light-transmitting portion onto the light-emitting substrate includes the orthographic projection of a lens unit onto the light-emitting substrate; and the minimum spacing between adjacent first light-transmitting portions is greater than 0.

11. The display panel of claim 10, wherein, The minimum spacing between adjacent lens units is greater than 0; the light-transmitting selective layer further includes: a second light-transmitting part, the second light-transmitting part being connected to an adjacent first light-transmitting part, and the orthogonal projection of the second light-transmitting part onto the light-emitting substrate covering the spacing between adjacent lens units.

12. The display panel of claim 1, wherein, Adjacent filter units are in direct contact.

13. The display panel of claim 12, wherein, The multiple filter units of the color filter layer include a first filter unit, a second filter unit, and a third filter unit arranged periodically. The edge of the second filter unit overlaps with the edge of the adjacent first filter unit and the edge of the adjacent third filter unit in the orthographic projection of the light-emitting substrate.

14. The display panel of any one of claims 1 to 13, comprising: Display area and border area; The light-emitting substrate includes a metal trace layer located in the frame region, and the light-transmitting selective layer covers the orthogonal projection of the metal trace layer in the orthogonal projection of the light-emitting substrate.

15. The display panel of claim 14, wherein, The thickness of the light-transmitting selection layer located in the border area is greater than the thickness of the light-transmitting selection layer located in the display area.

16. The display panel of any one of claims 1 to 15, wherein, The light-emitting substrate includes a driving backplate and a light-emitting structure disposed on the driving backplate. The light-emitting structure includes a plurality of light-emitting elements, and the plurality of light-emitting elements correspond one-to-one with the plurality of filter units.

17. The display panel of claim 16, wherein, The driving back plate is a silicon-based substrate integrated with a plurality of pixel circuits, and the plurality of pixel circuits are electrically connected with the plurality of light emitting elements.

18. The display panel of any one of claims 1 to 17, wherein, The lens unit is a convex lens protruding in a direction away from the light emitting substrate.

19. A display device comprising the display panel according to any one of claims 1 to 18.

Images