Display panel and display device

Abstract

The present disclosure provides a display panel and a display device, and relates to the technical field of display, the display panel comprises a substrate, a light emitting unit layer and a filter layer, the light emitting unit layer is located between the substrate and the filter layer; the filter layer comprises a first light shielding layer and a plurality of first filter parts, the first light shielding layer comprises a plurality of first openings, and the first filter parts are located in the first openings; a display area of the display panel comprises a first area and a second area which is arranged at least partially around the first area; the angle of an inclination angle of the first opening in the first area is different from the angle of the inclination angle of the first opening in the second area, and the inclination angle represents an included angle formed by an opening of the first opening close to the light emitting unit layer side and a side wall of the first opening. The present disclosure sets the angle of the inclination angle of the first opening in the second area to be different from the angle of the inclination angle in the first area, so as to reduce the light transmittance of the second area, which is beneficial to balancing the light transmittance of the first area and the second area, thereby improving the display uniformity and improving the display effect of the display product.

Description

Technical Field

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

[0002] With the development of display technology, OLED (Organic Light-Emitting Diode) display products have become the mainstream display technology due to their advantages such as being thin and light, having a wide viewing angle, being actively emitting light, having adjustable emission color cost, low cost, fast response speed, low energy consumption, low driving voltage, high luminous efficiency, and being flexible.

[0003] However, in some display products, the screen's display uniformity is poor, severely affecting the display effect. Therefore, how to improve the above-mentioned technical problems has become one of the urgent technical issues to be solved at this stage. Summary of the Invention

[0004] To address the aforementioned technical problems, this disclosure provides a display panel and a display device to improve display uniformity and enhance the display effect of display products.

[0005] In a first aspect, this disclosure provides a display panel, including a substrate, a light-emitting unit layer, and a filter layer, wherein the light-emitting unit layer is located between the substrate and the filter layer; The light-emitting unit layer includes a plurality of light-emitting units; the filter layer includes a first light-shielding layer and a plurality of first light-filtering portions, the first light-shielding layer includes a plurality of first openings, and the first light-filtering portions are located in the first openings; the orthographic projection of the first opening on the plane where the substrate is located overlaps with the orthographic projection of the light-emitting unit on the plane where the substrate is located. The display panel includes a first area and a second area that is at least partially surrounding the first area. The distance between the first area and the edge of the display panel is greater than the distance between the second area and the edge of the display panel. The tilt angle of the first opening in the first region is different from that of the first opening in the second region. The tilt angle represents the angle formed between the opening of the first opening near the light-emitting unit layer and the sidewall of the first opening.

[0006] Secondly, based on the same inventive concept, this disclosure provides a display device including the display panel described in the first aspect.

[0007] The technical solution provided in this disclosure has the following advantages compared with the prior art: This disclosure provides a display panel and a display device. The display panel includes a substrate, a light-emitting unit layer, and a light-filtering layer. The light-filtering layer includes a first light-shielding layer and a plurality of first light-filtering portions, each located in a plurality of first openings within the first light-shielding layer. The display area of ​​the display panel includes a first area and a second area, the first area being a region relatively close to the center of the display area, and the second area being a region relatively close to the edge of the display area. In embodiments of this disclosure, the tilt angles of the first openings in the first area and the tilt angles of the first openings in the second area are different. When the tilt angles are different, the degree to which the light emitted by the light-emitting unit is blocked or reflected by the sidewalls as it passes through the first openings also differs. Therefore, it is possible to control the effective amount of light emitted from the first openings in different areas, i.e., to control the light transmittance of the first openings in different areas. For the second zone, since the first filter film is thinner, the light transmittance is higher. By setting the tilt angle of the first opening in the second zone to be different from that in the first zone, the light transmittance of the second zone can be reduced. This helps to balance the light transmittance of the first and second zones, thereby visually eliminating or significantly reducing frame mura defects. As a result, it helps to improve display uniformity and improve the display effect of display products. Attached Figure Description

[0008] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0009] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 The image shown is a plan view of a display panel provided in an embodiment of this disclosure; Figure 2 The diagram shown is a schematic diagram of a film layer of a display panel provided in an embodiment of this disclosure; Figure 3 The diagram shown is a schematic diagram of another film layer of the display panel provided in an embodiment of this disclosure; Figure 4 The diagram shown is a schematic diagram of another film layer of the display panel provided in an embodiment of this disclosure; Figure 5 The diagram shown is a schematic diagram of another film layer of a display panel provided in an embodiment of this disclosure; Figure 6 The diagram shown is a schematic diagram of another film layer of a display panel provided in an embodiment of this disclosure; Figure 7The diagram shown is a schematic diagram of another film layer of a display panel provided in an embodiment of this disclosure; Figure 8 The diagram shown is a schematic diagram of another film layer of a display panel provided in an embodiment of this disclosure; Figure 9 The diagram shown is a schematic diagram of another film layer of a display panel provided in an embodiment of this disclosure; Figure 10 The diagram shown is a schematic diagram of another film layer of a display panel provided in an embodiment of this disclosure; Figure 11 The diagram shown is a schematic diagram of another film layer of a display panel provided in an embodiment of this disclosure; Figure 12 The diagram shown is a schematic diagram of another film layer of a display panel provided in an embodiment of this disclosure; Figure 13 The figure shown is a plan view of a display device provided in an embodiment of this disclosure. Detailed Implementation

[0011] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0012] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0013] The inventors discovered during their research that in some display products, when the screen is lit, the edges of the display area often exhibit higher brightness than the center, forming a bright outline that is visible to the naked eye. This phenomenon is commonly referred to as "frame mura" in the industry. The presence of frame mura severely disrupts the uniformity of screen brightness, especially when displaying dark or solid-color images, where the bright edge is easily noticeable, significantly impacting the display effect.

[0014] In view of this, the present disclosure provides a display panel and a display device for improving display uniformity and enhancing the display effect of display products.

[0015] Figure 1 The image shown is a plan view of a display panel provided in an embodiment of this disclosure. Figure 2 The diagram shown is a schematic representation of a film layer of a display panel provided in an embodiment of this disclosure. Please refer to it. Figure 1 and Figure 2This disclosure provides a display panel 100, which includes a substrate 00, a light-emitting unit layer 10, and a light-filtering layer 20. The light-emitting unit layer 10 is located between the substrate 00 and the light-filtering layer 20.

[0016] It should be noted that, Figure 1 The description uses a rectangular display panel as an example only and does not limit the actual shape of the display panel. In some other embodiments of this disclosure, the display panel 100 can also be a circle, a rounded rectangle, or any other feasible shape. Optionally, the display panel 100 provided in this embodiment can be an organic light-emitting display panel, and the corresponding light-emitting element is an OLED (Organic Light-Emitting Diode). Of course, in some other embodiments of this disclosure, the display panel can also be a display panel using inorganic light-emitting diode display technology, such as a Micro LED (Micro Light-Emitting Diode) display panel, or a Mini LED (Mini Light-Emitting Diode) display panel, etc. This disclosure does not limit it in this way.

[0017] The light-emitting unit layer 10 includes multiple light-emitting units 101. Optionally, the multiple light-emitting units 101 are arranged in a matrix to provide the light source required for the display. It should be noted that... Figure 1 The light-emitting unit 101 is only shown in a partial rectangular frame and does not represent the actual shape, size, number, or structure of the light-emitting unit 101. Figure 3 The diagram shown is a schematic representation of another film layer of the display panel provided in this embodiment. Please refer to [the diagram]. Figure 3 The substrate 00 includes a pixel driving circuit 001 for driving the light-emitting unit 101 to emit light. Figure 3 The diagram shows the connection relationship between the light-emitting unit 101 and the pixel driving circuit 001. It should be noted that... Figure 3 This diagram only illustrates one transistor in the pixel driving circuit 001 and does not limit the actual number of transistors contained in the pixel driving circuit 001. Please refer to... Figure 1 and Figure 2 and combined Figure 3The light-emitting unit 101 includes a first electrode layer 1011, a light-emitting material layer 1012, and a second electrode layer 1013. The pixel driving circuit 001 includes a driving transistor T0, which is electrically connected to the light-emitting unit 101. When the pixel driving circuit 001 provides an appropriate voltage, holes generated in the first electrode layer 1011 and electrons generated in the second electrode layer 1013 combine in the light-emitting material layer 1012 to generate light. The display panel 100 also includes a pixel definition layer 102, which is located on the side of the first electrode layer 1011 away from the substrate. The pixel definition layer 102 includes multiple pixel openings, and the light-emitting units 101 are disposed within the pixel openings. The light-emitting units 101 may include light-emitting units 101 of various colors. The accompanying drawings of this disclosure use different filling styles to illustrate light-emitting units 101 of different colors, and do not limit the color types and arrangement of the light-emitting units 101.

[0018] Please refer to Figure 1 and Figure 2 The light filter layer 20 includes a first light-shielding layer 21 and a plurality of first light-filtering portions 22. The first light-shielding layer 21 includes a plurality of first openings 211, and the first light-filtering portions 22 are located in the first openings 211. Optionally, the first light-shielding layer 21 is made of a light-shielding material containing black pigment or dye, and is used at least to absorb ambient light and stray light between adjacent light-emitting units 101.

[0019] In this embodiment, the orthographic projection of the first opening 211 onto the plane of the substrate 00 overlaps with the orthographic projection of the light-emitting unit 101 onto the plane of the substrate 00. With this arrangement, the light emitted from the light-emitting unit 101 is filtered by the first filter section 22 before being emitted, thus ensuring normal display functionality.

[0020] Optionally, the light-emitting unit 101 includes a red light-emitting unit, a green light-emitting unit, and a blue light-emitting unit; the first filter section 22 includes a red filter section, a green filter section, and a blue filter section, each of which allows light of its corresponding color to pass through. This arrangement achieves color display while each filter section filters light of its corresponding color, which helps to reduce light crosstalk, improve display contrast, and thus improve the display effect of the display product. It should be noted that the accompanying drawings of this disclosure use the same pattern to illustrate the light-emitting unit 101 and the first filter section 22 of the same color, indicating only that the corresponding colors are the same, and do not represent the same structure and material.

[0021] The display area AA of the display panel 100 includes a first area AA1 and a second area AA2 disposed at least partially around the first area AA1. The distance between the first area AA1 and the edge of the display panel 100 is greater than the distance between the second area AA2 and the edge of the display panel 100. It should be noted that the comparison of the distance between the first area AA1 and the edge of the display panel 100 being greater than the distance between the second area AA2 and the edge of the display panel 100 is made by comparing the distance between the same edge of the first area AA1 and the second area AA2 and the distance between the same edge of the display panel 100. For example, please refer to... Figure 1 From the view shown, the distance S1 between the right edge of the first zone AA1 and the right edge of the display panel 100 is greater than the distance S2 between the right edge of the second zone AA2 and the right edge of the display panel 100.

[0022] The tilt angle of the first opening 211 in the first region AA1 is different from that of the first opening 211 in the second region AA2. The tilt angle represents the angle formed by the opening of the first opening 211 on the side closer to the light-emitting unit layer 10 and the sidewall of the first opening 211.

[0023] It should be noted that the first region AA1 is the area relatively close to the center of the display area AA, and the second region AA2 is the area relatively close to the edge of the display area AA. The first filter element 22 is usually formed using inkjet printing. The material used to make the first filter element 22 is liquid before curing. When the liquid material flows, it usually flows from the center of the display area AA to the edge, resulting in a smaller thickness of the first filter element 22 near the edge. In other words, the thickness of the first filter element 22 near the edge is less than the thickness of the first filter element 22 near the center. That is, the thickness of the first filter element 22 in the second region AA2 is less than the thickness of the first filter element 22 in the first region AA1. The filtering effect of the first filter element 22 is positively correlated with its thickness. In other words, the thicker the first filter element 22, the stronger the filtering attenuation effect on the emitted light in the corresponding area; conversely, the thinner the first filter element 22, the weaker the filtering attenuation effect on the emitted light in the corresponding area. Therefore, the light transmittance in the second zone AA2 is greater than that in the first zone AA1. When the light-emitting unit 101 is lit, the light emitted from the second zone AA2 is abnormally high due to insufficient filtering effect, which visually appears as a brighter frame mura (indicating uneven brightness or color), seriously affecting the uniformity of the display.

[0024] This embodiment controls the light transmittance by differentiating the tilt angle of the first opening 211 sidewall of the first area AA1 (the area near the center of the display area AA) and the second area AA2 (the area near the edge of the display area AA), thereby balancing the light output effect between different areas.

[0025] Specifically, the tilt angle refers to the angle formed between the plane containing the opening edge closest to the light-emitting unit layer 10 and the sidewall of the first opening 211 for a single first opening 211. It can be understood as the degree of tilt of the sidewall relative to the bottom of the opening (closer to the light-emitting unit 101) in the cross-sectional shape of the first opening 211 along the first direction D1. The tilt angle of the first opening 211 directly affects the reflection and emission paths of light at the sidewall of the first opening 211. When the tilt angles of different regions are different, the light emitted by the light-emitting unit 101 is blocked or reflected to different degrees by the sidewall (first light-shielding layer 21) of the first opening 211 as it passes through the first opening 211. Therefore, it is possible to control the effective amount of light emitted from the first opening 211 in different regions, i.e., to control the light transmittance of the first opening 211 in different regions.

[0026] The first filter section 22 is located in the first opening 211. This disclosure improves the problem of different light output effects caused by the different light transmittance of the first opening 211 in different regions by adjusting the light transmittance of the first opening 211 in different regions. This helps to balance the light transmittance of different regions and thus improve the uniformity of the display.

[0027] For example, for the second region AA2, since the first filter part 22 has a thinner film thickness, the light transmittance is relatively high. By setting the tilt angle of the first opening 211 in the second region AA2 to be different from the tilt angle of the first opening 211 in the first region AA1, the light transmittance of the second region AA2 can be reduced. This helps to balance the light transmittance of the first region AA1 and the second region AA2, thereby visually eliminating or significantly reducing frame mura defects. Therefore, it helps to improve display uniformity and improve the display effect of the display product.

[0028] Please continue to refer to this. Figure 1 and Figure 2 In one optional embodiment of this disclosure, the tilt angle α1 of the first opening 211 in the first region AA1 is greater than the tilt angle α2 of the first opening 211 in the second region AA2.

[0029] In this embodiment, the first opening 211 located in the first region AA1 has a relatively gentle sidewall and a large tilt angle α1; the first opening 211 located in the second region AA2 has a relatively steep sidewall and a small tilt angle α2. From the perspective of light transmission, when the light emitted by the light-emitting unit 101 enters the first opening 211 from the bottom, the tilt degree of the sidewall of the first opening 211 determines the incident angle of the light on the sidewall and the possible number and direction of reflections. A gentler sidewall (larger tilt angle) generally blocks less upward-propagating light and has higher light extraction efficiency; a steeper sidewall (smaller tilt angle) blocks or absorbs more light with a larger divergence angle, resulting in a relatively reduced effective emitted light amount.

[0030] Because the first filter section 22 of the second region AA2 is thinner, the light emitted by the light-emitting unit 101 is attenuated less when passing through the filter layer 20 than that of the first region AA1, resulting in frame mura defects and affecting the display uniformity of the display product. In this embodiment, a smaller tilt angle is set in the second region AA2, making the sidewall of the first opening 211 steeper. This enhances the blocking effect on obliquely incident light, causing some light to be absorbed or reflected back to the bottom by the sidewall, preventing effective emission from the first filter section 22. This configuration effectively improves the optical attenuation effect of the second region AA2, helping to offset some of the higher transmittance caused by the thinner thickness of the first filter section 22. This makes the light transmittance of the second region AA2 more consistent with that of the first region AA1, thereby improving frame mura defects and enhancing display uniformity, thus improving the display effect of the display product.

[0031] It should be noted that this disclosure Figure 2 The explanation is based solely on the example of the first opening 211 in the first zone AA1 having an obtuse angle α1 and the first opening 211 in the second zone AA2 having an obtuse angle, and is not limited to this example. Figure 4 The diagram shown is a schematic representation of another film layer of the display panel provided in this embodiment. Please refer to... Figure 1 and Figure 4 In some alternative embodiments, the tilt angle α1 of the first opening 211 in the first region AA1 can be an obtuse angle, and the tilt angle α2 of the first opening 211 in the second region AA2 can be an acute angle. This disclosure aims to illustrate that the tilt angle α1 of the first opening 211 in the first region AA1 is greater than the tilt angle α2 of the first opening 211 in the second region AA2. This arrangement helps to balance the light transmittance of the first region AA1 and the second region AA2, thereby balancing the display effect of different regions and improving the display effect of the display product.

[0032] Figure 5 The diagram shown is a schematic representation of another film layer of a display panel provided in this embodiment. Please refer to [the diagram]. Figure 1 , Figure 4 as well as Figure 5 Furthermore, this disclosure provides an optional implementation in which the tilt angle α1 in the first region AA1 is α1, and the tilt angle α2 in the second region AA2 is α2; α1 ≥ 90°, α2 < 90°. It should be noted that, for clarity, the tilt angle and the corresponding angle are represented by the same notation in the accompanying drawings. For example, the tilt angle α1 is α1, and the tilt angle α2 is α2.

[0033] When the tilt angle α1 is greater than or equal to 90°, the sidewall of the first opening 211 in the first region AA1 is either vertical or tilted away from the light-emitting unit 101. For details, please refer to... Figure 5 The tilt angle α1 = 90° indicates that the sidewall of the first opening 211 is perpendicular to the reference plane, and the cross-section of the first opening 211 is rectangular with the same upper and lower diameters; please refer to... Figure 4 The tilt angle α1 > 90° indicates that the sidewall of the first opening 211 forms an obtuse angle with the bottom of the first opening 211. This results in the first opening 211 having a smaller diameter on the side closer to the light-emitting unit layer 10 and a larger diameter on the side farther from the light-emitting unit layer 10, with a cross-section that is either an inverted trapezoid or wider at the top and narrower at the bottom. This configuration minimizes the obstruction of light emitted upwards from the light-emitting unit 101, facilitating efficient light transmission and improving light transmittance.

[0034] When the tilt angle α2 < 90°, the first opening 211 of the second region AA2 has its sidewall tilted towards the side closer to the light-emitting unit 101. That is, the diameter of the first opening 211 is larger on the side closer to the light-emitting unit layer 10 and smaller on the side farther away from the light-emitting unit layer 10, and the cross-section is trapezoidal or narrower at the top and wider at the bottom. With this opening shape, the sidewall effectively blocks or absorbs oblique light rays with a large divergence angle, allowing light rays in the near-normal direction or within a small angle range to effectively exit to a certain extent, while blocking some light rays in a large angle range and reducing light transmittance.

[0035] In this embodiment, the tilt angle α1 in the first region AA1 is ≥90°, and the cross-section of the resulting first opening 211 is rectangular or inverted trapezoidal, which facilitates efficient light transmission and improves the light transmittance of the first region AA1. In the second region AA2, the tilt angle α2 is <90°, and the cross-section of the resulting first opening 211 is trapezoidal, which helps to block some light transmission, thereby reducing the light transmittance of the first opening 211 in the second region AA2. This arrangement helps to make the light transmittance of the first region AA1 and the second region AA2 more consistent, improving display uniformity and thus improving the display effect of the display product.

[0036] Furthermore, in the first area AA1, which is closer to the center of the display area AA, this embodiment sets the tilt angle α1 of the first opening 211 in the first area AA1 to α1≥90°, which helps to reduce light obstruction. This setting helps to ensure that the light effect of the central area is not damaged by the frame mura compensation design, which helps to improve display brightness and reduce power consumption. In the second area AA2, which is closer to the edge of the display area AA, this embodiment sets the tilt angle α2 of the first opening 211 in the second area AA2 to α2<90°. The proportion of large-angle oblique light emitted is blocked by the sidewall of the first opening 211 is higher, which also helps to reduce the risk of edge light leakage, further improving the display effect of the display product.

[0037] Figure 6 The diagram shown is a schematic representation of another film layer of a display panel provided in this embodiment. Please refer to [the diagram]. Figure 1 and Figure 6 In one optional embodiment of this disclosure, along the direction D2 from the first region AA1 to the second region AA2, the angle of inclination of the plurality of first openings 211 tends to decrease.

[0038] Specifically, the first area AA1 is the area relatively close to the center of the display area AA, and the second area AA2 is the area relatively close to the edge of the display area AA. In this embodiment, along the direction D2 from the first area AA1 to the second area AA2, that is, from the center of the display area AA to the edge, the tilt angle of the plurality of first openings 211 tends to decrease.

[0039] It should be noted that if the tilt angles of the first zone AA1 and the second zone AA2 change abruptly, the difference in tilt angles will cause a step change in light transmittance at the boundary between the two zones. This may create a new visible boundary on the display screen or lead to uneven brightness across the entire display area AA. This embodiment achieves a gradual reduction in light transmittance by setting the tilt angle to decrease from the center to the edge, resulting in a smooth transition in brightness from the first zone AA1 to the second zone AA2. This setting is more conducive to improving display uniformity and further enhances the display effect of the display product.

[0040] Meanwhile, the thickness of the first filter section 22 does not exhibit a strict two-stage distribution of thicker at the center and thinner at the edge from the center of the display area AA, but rather a continuously decreasing process. Therefore, by setting the tilt angle to gradually decrease, it can be adapted to the gradual thinning of the first filter section 22 film thickness, which is more conducive to balancing display uniformity and improving the display effect of the display product.

[0041] Please refer to Figure 1 and Figure 2In one optional embodiment of this disclosure, the display panel 100 further includes a non-display area NA, which at least partially surrounds the display area AA; no other display area is included between the non-display area NA and the second area AA2.

[0042] Specifically, the display panel 100 includes a display area AA and a non-display area NA. The display area AA is used to display images and includes multiple light-emitting units 101. The non-display area NA, i.e., the border area, is provided with structures such as driving circuits, signal traces, and encapsulation borders. In this embodiment, the second area AA2 is the area of ​​the display area AA that is closest to the non-display area NA, and the two are directly adjacent or connected by the boundary of the display area AA. The display area AA includes a first area AA1 (central area) and a second area AA2 (edge ​​area) that at least partially surrounds the first area AA1. The outer boundary of the second area AA2 can be considered as the boundary of the display area AA, which is adjacent to the non-display area NA. The first area AA1 is located inside the second area AA2, separated from the non-display area NA by the second area AA2.

[0043] It should be noted that frame mura defects typically occur at the edges of display area AA, and the second area AA2 corresponds to the edge of display area AA. In other words, this embodiment compensates for the edge region of display area AA by making the tilt angle of the first opening 211 in the second area AA2 smaller than the tilt angle of the second opening 312 in the first area AA1, thereby achieving accurate compensation for frame mura defects. Therefore, this embodiment is beneficial for balancing the display effect of the central and edge regions of display area AA, improving the display uniformity of display area AA, and thus improving the display effect of display products.

[0044] Please refer to Figure 1 and Figure 2 In one optional embodiment of this disclosure, in the first region AA1, the tilt angle α1 of each first opening 211 is the same; in the second region AA2, the tilt angle α2 of each first opening 211 is the same.

[0045] Specifically, in this embodiment, multiple first openings 211 in the first region AA1 all adopt the same tilt angle, resulting in identical shapes for the first openings 211. Similarly, multiple first openings 211 in the second region AA2 also adopt the same tilt angle, resulting in identical shapes for the first openings 211. Since both the first region AA1 and the second region AA2 use a single tilt angle value, only two angle parameters need to be determined during the design process, eliminating the need for complex transformations. The first openings 211 in the first region AA1 can replicate the same graphic, and the first openings 211 in the second region AA2 can also replicate the same graphic. This configuration significantly simplifies mask design, thereby reducing design difficulty and making it more suitable for high-resolution display products with a large number of pixels.

[0046] Meanwhile, the light transmittance of each first opening 211 within the first zone AA1 is the same, which helps ensure uniform brightness in the central area of ​​the display zone AA and avoids local differences in brightness caused by changes in the tilt angle. The light transmittance of each first opening 211 within the second zone AA2 is also the same, ensuring consistent brightness in the edge area within this zone, which helps prevent areas near the boundary from being too dark or too bright. In this embodiment, the display panel 100 as a whole presents two areas of uniform brightness, which helps improve the uniformity of optical characteristics within the areas.

[0047] Figure 7 The diagram shown is a schematic diagram of another film layer of the display panel provided in an embodiment of this disclosure. Figure 8 The diagram shown is a schematic representation of another film layer of a display panel provided in this embodiment. Please refer to [the diagram]. Figure 1 , Figure 7 as well as Figure 8 In one optional embodiment of this disclosure, the display panel 100 further includes a privacy layer 30, which includes a second light-shielding layer 31. The second light-shielding layer 31 includes a plurality of second openings 312. The orthographic projection of the second openings 312 onto the plane where the substrate 00 is located overlaps with the orthographic projection of the first opening 211 onto the plane where the substrate 00 is located, and also overlaps with the orthographic projection of the light-emitting unit 101 onto the plane where the substrate 00 is located.

[0048] Specifically, in this embodiment, the display panel 100 further includes a privacy layer 30, which includes a second light-shielding layer 31. Optionally, the second light-shielding layer 31 is made of the same material as the first light-shielding layer 21. For example, both the first light-shielding layer 21 and the second light-shielding layer 31 are made of a light-shielding material containing black pigment or dye. Through the light-blocking effect of the light-shielding material, light within a certain angle range can be restricted from escaping through the second opening 312, absorbing or blocking at least a portion of the large-angle oblique light, thereby achieving the privacy effect of the display product. Along the light-emitting direction of the display panel 100, light is emitted by the light-emitting unit 101. When passing through the first opening 211, the first light filter 22 filters the light. When passing through the second opening 312, the second light-shielding layer 31 constrains the angle of the light to achieve privacy.

[0049] It should be noted that the first light-blocking layer 21 also has a certain blocking effect on light, and can also block some light from piercing through wide angles, thus contributing to privacy protection. The first light-blocking layer 21 and the second light-blocking layer 31 work together to further filter and effectively block light, thereby improving the privacy protection effect.

[0050] Please continue to refer to this. Figure 1 , Figure 7 as well as Figure 8Optionally, the privacy layer 30 is located on the side of the filter layer 20 away from the light-emitting unit layer 10, or the privacy layer 30 is located on the side of the filter layer 20 closer to the light-emitting unit layer 10.

[0051] Specifically, regarding the positional relationship between the privacy layer 30 and the light filter layer 20, this disclosure provides two different implementation methods. Please refer to [link / reference]. Figure 7 In one optional embodiment, the privacy layer 30 is located on the side of the light filter layer 20 away from the light-emitting unit layer 10. Along the light emission direction of the display panel 100, the stacking order of the film layers is as follows: light-emitting unit layer 10, light filter layer 20, and privacy layer 30. After light is emitted from the light-emitting unit 101, it first passes through the first opening 211 of the light filter layer 20 and then through the first filter portion 22 for color filtering. It then passes through the second opening 312 of the privacy layer 30 for viewing angle constraint before finally emitting light. The privacy layer 30 is located on the outer side closer to the observer, while the light filter layer 20 is located on the inner side closer to the light-emitting unit 101.

[0052] Please refer to Figure 8 In another optional embodiment provided by this disclosure, the privacy layer 30 is located on the side of the light filter layer 20 closer to the light-emitting unit layer 10. Along the light emission direction of the display panel 100, the stacking order of the layers is as follows: light-emitting unit layer 10, privacy layer 30, and light filter layer 20. After light is emitted from the light-emitting unit 101, it first passes through the second opening 312 of the privacy layer 30 for viewing angle constraint, then passes through the first opening 211 of the light filter layer 20 and undergoes color filtering through the first filter portion 22 before finally emitting light. The light filter layer 20 is located on the outer side closer to the observer, and the privacy layer 30 is located on the inner side closer to the light-emitting unit 101.

[0053] The two implementation methods described above can be flexibly selected according to the process architecture in practical applications. For example, if the privacy layer 30 is made of an organic light-shielding material that is not heat-resistant, and the formation of the light filter layer 20 requires a high-temperature curing process, then the privacy layer 30 can be placed above the light filter layer 20 and manufactured after the light filter layer 20 to avoid damage from the high-temperature curing process of the light filter layer 20. Conversely, if the privacy layer 30 is made of a metal material and its patterning process conflicts with that of the light filter layer 20, it can be manufactured before the light filter layer 20. Therefore, this disclosure is beneficial for improving design flexibility and adapting to different process architectures.

[0054] Meanwhile, different orders of the privacy layer 30 and the filter layer 20 will result in different optical path sequences. For example, when the privacy layer 30 is above the filter layer 20, the viewing angle constraint occurs after filtering. At this time, the light entering the privacy layer 30 is already a narrow-band light of the desired color. When the second light-shielding layer 31 performs viewing angle filtering, it can prevent different wavelengths of white light from dispersing at the light-shielding edge due to differences in diffraction or scattering characteristics, which helps maintain the color purity of the emitted light and further improves the display effect. Simultaneously, as the outermost optical structure, the privacy layer 30 can further control the angular distribution of the final emitted light, which is beneficial for accurately controlling the privacy angle. For another example, when the privacy layer 30 is below the filter layer 20, the viewing angle constraint occurs before filtering. The wide-angle light emitted by the light-emitting unit 101 is first filtered into a narrow-angle beam by the privacy layer 30 before entering the filter layer 20. When narrow-angle incident light passes through the first filter 22, the optical path difference is smaller, which helps to reduce color shift caused by the increased optical path of large-angle light and improve color consistency within the viewing angle range. At the same time, the reflection loss of narrow-angle light at the interfaces of each film layer of the filter layer 20 is also lower, which also helps to improve luminous efficiency and further improve the display effect of the display product.

[0055] Furthermore, regardless of which side of the filter layer 20 the privacy layer 30 is located on, the privacy layer 30 is built into the display panel 100. Compared with related technologies where a privacy film is applied to the outside of the display panel 100, this is beneficial in improving the problems of edge grating damage and bonding stress caused by an external privacy film. The frame mura defect at the edge of the display panel 100 is mainly caused by the thinning of the first filter portion 22 in the edge region, which can be compensated for by setting the tilt angle in the filter layer 20, and is not affected by external privacy components. Therefore, it is more conducive to improving the frame mura defect, and thus to improving the display effect of the display product.

[0056] Please refer to Figure 1 , Figure 7 and Figure 8 In one optional embodiment of this disclosure, along the first direction D1, the thickness H1 of the first light-shielding layer 21 is less than the thickness H2 of the second light-shielding layer 31, and the first direction D1 is perpendicular to the plane where the substrate 00 is located. In this embodiment, the first light-shielding layer 21 in the filter layer 20 is relatively thin, while the second light-shielding layer 31 in the privacy layer 30 is relatively thick.

[0057] In the filter layer 20, the first filter portion 22 typically fills the first opening 211 and overlaps the first light-shielding layer 21. If the thickness H1 of the first light-shielding layer 21 is too large, a significant height difference will be formed at the first opening 211. During the fabrication of the first filter portion 22, cracks or poor flatness may occur in the first filter portion 22, affecting the uniformity of the display. In this embodiment, the first light-shielding layer 21 is set to a smaller thickness, which helps to reduce the discontinuity at the first opening 211, improves the flatness of the first filter portion 22, and thus helps to improve the uniformity of the display and the display effect of the display product.

[0058] In the privacy layer 30, the second light-shielding layer 31 mainly relies on the aspect ratio (the ratio of thickness to width) of the second opening 312 to block light emitted from a wide viewing angle. The thicker the second light-shielding layer 31, the larger the aspect ratio of the second opening 312, given a fixed width, resulting in a narrower range of light emission angles and a better privacy protection effect. This embodiment sets a larger thickness for the second light-shielding layer 31, which reduces the light emission angle without reducing the width of the second opening 312 or affecting the amount of light emitted, further facilitating the achievement of small-angle light emission and large-angle privacy protection.

[0059] It should be noted that this disclosure is only illustrative of the above-described embodiments and is not intended to be limited thereto. Figure 9 The diagram shown is a schematic diagram of another film layer of the display panel provided in an embodiment of this disclosure. Figure 10 The diagram shown is a schematic representation of another film layer of a display panel provided in this embodiment. Please refer to [the diagram]. Figure 1 , Figure 9 and Figure 10 In one optional embodiment of this disclosure, in the second region AA2, the privacy layer 30 further includes a plurality of second light-filtering portions 32, which are located in the second opening 312; at this time, along the first direction D1, the thickness H1 of the first light-shielding layer 21 is equal to the thickness H2 of the second light-shielding layer 31, and the first direction D1 is perpendicular to the plane where the substrate 00 is located.

[0060] Specifically, in some embodiments, the second opening 312 of the privacy layer 30 is filled with a transparent medium (e.g., Figure 8The privacy layer 30 provided in the illustrated embodiment primarily functions to restrict the viewing angle, while the color filtering effect is mainly achieved by the first filter portion 22 in the filter layer 20. In this embodiment, the privacy layer 30 also includes a filter portion (second filter portion 32) in the second area AA2 of the display panel 100, and the second filter portion 32 is disposed within the corresponding second opening 312. That is, the second opening 312 in the second area AA2 is no longer a simple light-passing hole, but an opening with a certain filtering effect. In other words, the privacy layer 30 in the second area AA2 serves both as a light filter and a viewing angle constraint. With this configuration, the addition of the second filter portion 32 in the second opening 312 of the privacy layer 30 in the second area AA2 is equivalent to adding an additional light filtering attenuation stage to the light path in the edge region, which is more conducive to reducing the light transmittance of the second area AA2, further improving frame mura defects, and enhancing display uniformity. Optionally, the material and thickness of the second filter section 32 can be the same as or different from the first filter section 22 in the first region AA1, and can be designed according to the light attenuation requirements.

[0061] When the second light-filtering portion 32 is introduced into the privacy layer 30, this embodiment further sets the thickness of the first light-shielding layer 21 and the second light-shielding layer 31, that is, the thickness H1 of the first light-shielding layer 21 is equal to the thickness H2 of the second light-shielding layer 31. When the thicknesses of the first light-shielding layer 21 and the second light-shielding layer 31 are equal (H1=H2), the two light-shielding layers can use the same or similar film-forming process parameters, making process control simpler. Especially in the second region AA2, the light-shielding layers of equal thickness make the spatial relationship between the second opening 312 and the first opening 211 in the thickness direction more regular, which is beneficial to the flat coating of subsequent film layers, reduces the additional step difference introduced by the thickness difference, and further helps to reduce the risk of uneven film thickness at the edges. At the same time, when the second light-shielding layer 31 is thinned to the same thickness as the first light-shielding layer 21, it is beneficial to improve the flatness of the second light-filtering portion 32, which is beneficial to improve the display uniformity and improve the display effect of the display product.

[0062] Figure 11 The diagram shown is a schematic representation of another film layer of a display panel provided in this embodiment. Please refer to [the diagram]. Figure 1 and Figure 11 In one optional embodiment of this disclosure, the orthographic projection area of ​​a single first opening 211 in the first region AA1 onto the plane where the substrate 00 is located is greater than the orthographic projection area of ​​a single first opening 211 in the second region AA2 onto the plane where the substrate 00 is located.

[0063] It should be noted that the orthographic projection area of ​​the first opening 211 on the plane of the substrate 00 refers to the smaller of the bottom opening and the top opening of the first opening 211 on the plane of the substrate 00. For example, the cross-section of the first opening 211 in the first region AA1 is an inverted trapezoid, and the bottom opening of the first opening 211 is smaller than the top opening. Therefore, the orthographic projection area of ​​the first opening 211 on the plane of the substrate 00 is the orthographic projection area of ​​the bottom opening on the plane of the substrate 00 (corresponding to K1). The cross-section of the first opening in the second region AA2 is a regular trapezoid, and the top opening of the first opening is smaller than the bottom opening. Therefore, the orthographic projection area of ​​the first opening 211 on the plane of the substrate 00 is the orthographic projection area of ​​the top opening on the plane of the substrate 00 (corresponding to K2).

[0064] Specifically, the first opening 211 is an opening formed in the first light-shielding layer 21 of the filter layer 20, and a first filter part 22 is disposed inside it to achieve color filtering. The orthographic projection area of ​​the first opening 211 on the plane of the substrate 00 affects the effective light transmission aperture size of a single light-emitting unit 101. When the orthographic projection area of ​​the first opening 211 is large, a higher proportion of the light emitted by the light-emitting unit 101 can pass through the first opening 211 and finally be emitted, and the light transmittance of the first opening 211 is higher; conversely, when the orthographic projection area of ​​the first opening 211 is small, the light transmittance of the first opening 211 is lower.

[0065] This embodiment sets the area of ​​the first opening 211 in the first region AA1 to be larger than the area of ​​the first opening 211 in the second region AA2, thereby maintaining a higher light transmittance in the central region and reducing the light transmittance in the edge region. Furthermore, the tilt angle of the first opening 211 in the first region AA1 is greater than that in the second region AA2, which further helps to reduce the light transmittance in the second region AA2, thus improving frame mura defects, enhancing display uniformity, and improving the display effect of the display product.

[0066] Figure 12 The diagram shown is a schematic representation of another film layer of a display panel provided in this embodiment. Please refer to [the diagram]. Figure 1 and Figure 12 In one optional embodiment of this disclosure, the display panel 100 further includes a touch layer 40, which is located between the light-emitting unit layer 10 and the filter layer 20.

[0067] Specifically, this disclosure provides a method in which a touch layer 40 is built into a display panel 100. The touch layer 40 is located on the side of the light-emitting unit layer 10 away from the substrate 00 and on the side of the filter layer 20 close to the light-emitting unit layer 10. It should be noted that if the touch layer 40 is located on the side of the filter layer 20 away from the light-emitting unit layer 10, the electrode pattern and insulation layer thickness undulations inside the touch layer 40 may introduce additional refraction, scattering, or diffraction effects at the end of the light path, thereby disrupting the well-controlled light distribution. This is especially true in a display panel 100 including a privacy layer 30, which can seriously affect the display effect. In this embodiment, the touch layer 40 is placed below the filter layer 20. When the display panel 100 includes a privacy layer 30, the touch layer 40 is also placed below the privacy layer 30. This allows light to bypass the touch layer 40 after filtering and privacy control, thus the light control effect is not affected by the structure of the touch layer 40. This is more conducive to improving the compensation effect for frame mura defects and also to improving the privacy effect.

[0068] Optionally, the touch layer 40 includes metal electrodes or transparent conductive patterns. These metal electrodes or transparent conductive patterns are located on the light-emitting side of the display panel 100, making them prone to reflecting ambient light, which can lead to decreased contrast and reduced visibility in outdoor or bright light environments. By placing the touch layer 40 below the light filter layer 20, ambient light must first pass through the light filter layer 20 (the first light-shielding layer 21 in the light filter layer 20 can absorb some ambient light) before reaching the touch layer 40 and being reflected. The reflected light is further attenuated when it passes through the light filter layer 20 again. This arrangement effectively reduces the amount of reflected light emitted from the touch layer 40, thereby improving the outdoor contrast and readability of the display panel 100.

[0069] Furthermore, when the touch layer 40 is disposed below the filter layer 20, the filter layer 20 and the film layer above it can protect the touch layer 40, which helps to reduce the risk of electrode corrosion or touch performance degradation or even failure due to water vapor penetration, thereby improving the reliability of the display product.

[0070] Based on the same inventive concept, this disclosure provides a display device. Figure 13 The diagram shown is a plan view of a display device provided in an embodiment of this disclosure. Please refer to it. Figure 13 The display device 200 includes the display panel 100 in any of the above embodiments. The display device 200 provided in this disclosure can be any electronic device with display function, such as a touch screen, mobile phone, tablet computer, laptop computer, monitor, or television. The display device 200 provided in this disclosure has the beneficial effects of the display panel 100 provided in this disclosure. For details, please refer to the specific descriptions of the display panel 100 in the above embodiments; these descriptions will not be repeated here.

[0071] It should be noted that, Figure 13 The rectangular structure is used as an example to illustrate one shape of the display device 200. In some other embodiments of this disclosure, the display device 200 may also be circular, elliptical or any other feasible shape, and this disclosure does not specifically limit it.

[0072] As can be seen from the above embodiments, the display panel and display device provided in this disclosure achieve at least the following beneficial effects: This disclosure provides a display panel and a display device. The display panel includes a substrate, a light-emitting unit layer, and a light-filtering layer. The light-filtering layer includes a first light-shielding layer and a plurality of first light-filtering portions, each located in a plurality of first openings within the first light-shielding layer. The display area of ​​the display panel includes a first area and a second area, the first area being a region relatively close to the center of the display area, and the second area being a region relatively close to the edge of the display area. In embodiments of this disclosure, the tilt angles of the first openings in the first area and the tilt angles of the first openings in the second area are different. When the tilt angles are different, the degree to which the light emitted by the light-emitting unit is blocked or reflected by the sidewalls as it passes through the first openings also differs. Therefore, it is possible to control the effective amount of light emitted from the first openings in different areas, i.e., to control the light transmittance of the first openings in different areas. For the second zone, since the first filter film is thinner, the light transmittance is higher. By setting the tilt angle of the first opening in the second zone to be different from that in the first zone, the light transmittance of the second zone can be reduced. This helps to balance the light transmittance of the first and second zones, thereby visually eliminating or significantly reducing frame mura defects. As a result, it helps to improve display uniformity and improve the display effect of display products.

[0073] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0074] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that, It includes a substrate, a light-emitting unit layer, and a filter layer, wherein the light-emitting unit layer is located between the substrate and the filter layer; The light-emitting unit layer includes a plurality of light-emitting units; the light-filtering layer includes a first light-shielding layer and a plurality of first light-filtering parts, the first light-shielding layer includes a plurality of first openings, and the first light-filtering parts are located in the first openings; The orthographic projection of the first opening onto the plane of the substrate overlaps with the orthographic projection of the light-emitting unit onto the plane of the substrate. The display panel includes a first area and a second area that is at least partially surrounding the first area. The distance between the first area and the edge of the display panel is greater than the distance between the second area and the edge of the display panel. The tilt angle of the first opening in the first region is different from that of the first opening in the second region. The tilt angle represents the angle formed between the opening of the first opening near the light-emitting unit layer and the sidewall of the first opening.

2. The display panel according to claim 1, characterized in that, The angle of inclination of the first opening in the first region is greater than the angle of inclination of the first opening in the second region.

3. The display panel according to claim 2, characterized in that, The tilt angle in the first region is α1, and the tilt angle in the second region is α2; α1 ≥ 90°, α2 < 90°.

4. The display panel according to claim 2, characterized in that, Along the direction from the first region to the second region, the angles of the tilt angles of the plurality of first openings show a decreasing trend.

5. The display panel according to claim 2, characterized in that, It also includes a non-display area, which at least partially surrounds the display area; There are no other display areas between the non-display area and the second area.

6. The display panel according to claim 5, characterized in that, In the first region, the tilt angles of each of the first openings are the same; in the second region, the tilt angles of each of the first openings are the same.

7. The display panel according to claim 2, characterized in that, It also includes a privacy layer, which includes a second light-shielding layer. The second light-shielding layer includes a plurality of second openings. The orthographic projection of the second opening on the plane where the substrate is located overlaps with the orthographic projection of the first opening on the plane where the substrate is located, and also overlaps with the orthographic projection of the light-emitting unit on the plane where the substrate is located.

8. The display panel according to claim 7, characterized in that, The privacy layer is located on the side of the filter layer away from the light-emitting unit layer, or the privacy layer is located on the side of the filter layer closer to the light-emitting unit layer.

9. The display panel according to claim 7, characterized in that, Along the first direction, the thickness of the first light-shielding layer is less than the thickness of the second light-shielding layer, and the first direction is perpendicular to the plane where the substrate is located.

10. The display panel according to claim 7, characterized in that, In the second area, the privacy layer further includes a plurality of second filter portions, which are located in the second opening; Along the first direction, the thickness of the first light-shielding layer is equal to the thickness of the second light-shielding layer, and the first direction is perpendicular to the plane of the substrate.

11. The display panel according to claim 2, characterized in that, The projected area of ​​a single first opening in the first region on the plane of the substrate is greater than the projected area of ​​a single first opening in the second region on the plane of the substrate.

12. The display panel according to claim 1, characterized in that, It also includes a touch layer, which is located between the light-emitting unit layer and the filter layer.

13. A display device, characterized in that, The display panel includes any one of claims 1 to 12.

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