A display panel and display device

Abstract

This invention provides a display panel and a display device. The display panel includes a black matrix aperture and a light extraction aperture. The orthographic projection of the black matrix aperture onto the substrate is a second projection, and the geometric center of the second projection is a second center. The orthographic projection of the light extraction aperture onto the substrate is a third projection, and the geometric center of the third projection is a third center. The second center and the third center do not coincide. The non-coincidence of the second center of the light extraction aperture and the third center of the black matrix aperture reduces the impact of process variations on light efficiency, thereby improving the optical differences in viewing angles from different directions on the display panel, enhancing the light extraction effect of the display panel, and ensuring the display effect of the display panel.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a display panel and a display device. Background Technology

[0002] Organic light-emitting diode (OLED) displays offer numerous advantages over liquid crystal displays (LCDs), including thinner and lighter designs, higher brightness, lower power consumption, faster response times, higher resolution, greater flexibility, and higher luminous efficiency, gradually becoming the mainstream display technology. The light-emitting principle of OLEDs involves holes generated at the anode and electrons at the cathode moving under the influence of an electric field. These electrons are injected into the hole transport layer and electron transport layer, respectively, and migrate to the organic light-emitting material layer. When these electrons meet in the light-emitting material layer, they generate excitons, which in turn excite the light-emitting molecules in the organic light-emitting material layer to produce visible light.

[0003] Organic light-emitting displays (OLEDs) include multiple layers of film with different refractive indices. This causes light emitted from a pixel to undergo various reflections and refractions, preventing it from emitting directly above the pixel and affecting its brightness. Additionally, light at large angles may reach adjacent pixels, causing color mixing issues. Summary of the Invention

[0004] In view of this, the present invention provides a display panel and display device to solve the problem of deterioration of viewing angle brightness caused by the light extraction unit in the prior art, which can improve the viewing angle deviation of the display panel and effectively improve the light extraction efficiency and display effect of the display panel.

[0005] In a first aspect, the present invention provides a display panel, comprising a substrate, a pixel defining layer located on one side of the substrate, the pixel defining layer including a plurality of pixel openings defining light-emitting units; a filter layer and a light extraction layer located on the side of the light-emitting layer away from the substrate; a black matrix including black matrix openings corresponding to the light-emitting units; a light extraction layer including a first matching layer and a second matching layer, the first matching layer located on the side of the second matching layer closer to the substrate, the first matching layer including light extraction openings corresponding to the light-emitting units; the orthographic projection of the pixel openings onto the substrate is a first projection, the geometric center of the first projection is a first center; the orthographic projection of the black matrix openings onto the substrate is a second projection, the geometric center of the second projection is a second center; the orthographic projection of the light extraction openings onto the substrate is a third projection, the geometric center of the third projection is a third center; wherein the second center and the third center do not coincide.

[0006] Secondly, the present invention also provides a display device, including the display panel provided by the present invention.

[0007] Compared with the prior art, the display panel and display device provided by the invention achieve at least the following beneficial effects: In the light extraction layer and the filter layer, the second center of the light extraction opening and the third center of the black matrix opening do not coincide, and the light extraction opening and the black matrix opening have different offset positions. This can ensure the light extraction efficiency of the display panel by utilizing the light extraction layer, and can also adjust the viewing angle brightness by using the position of the color resist unit in the filter layer through the non-complete coincidence of the black matrix opening and the offset position of the black matrix opening, thereby improving the directional color difference phenomenon caused by the light extraction structure. In addition, by utilizing the alignment deviation between the light extraction opening and the black matrix opening, the influence of process fluctuations on light efficiency can be reduced, thereby improving the situation of viewing angle optical differences in different directions of the display panel, improving the light extraction effect of the display panel, and ensuring the display effect of the display panel.

[0008] Of course, any product implementing this invention need not necessarily achieve all of the technical effects described above at the same time.

[0009] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of an optional embodiment of the display panel provided in this invention.

[0011] Figure 2 for Figure 1 An optional top view of the aforementioned display panel;

[0012] Figure 3 This is a schematic diagram of another optional embodiment of the display panel provided in this invention.

[0013] Figure 4 This is a schematic diagram of another optional implementation of the display panel provided in the embodiments of the present invention;

[0014] Figure 5 A top view schematic diagram of another optional display panel provided in an embodiment of the present invention;

[0015] Figure 6 A top view schematic diagram of another optional display panel provided in an embodiment of the present invention;

[0016] Figure 7 A top view schematic diagram of another optional display panel provided in an embodiment of the present invention;

[0017] Figure 8 A schematic diagram illustrating another optional embodiment of the display panel provided in this invention;

[0018] Figure 9A top view schematic diagram of another optional embodiment of the display panel provided in the present invention;

[0019] Figure 10 A top view schematic diagram of another optional embodiment of the display panel provided in this invention;

[0020] Figure 11 A top view schematic diagram of another optional embodiment of the display panel provided in this invention;

[0021] Figure 12 A top view schematic diagram of another optional embodiment of the display panel provided in this invention;

[0022] Figure 13 This is a schematic diagram of a display device provided in an embodiment of the present invention. Detailed Implementation

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] It should be noted that specific details are set forth in the following description to provide a full understanding of the invention. However, the invention can be practiced in many ways other than those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below. Furthermore, in the following description, the same reference numerals in the figures denote the same or similar structures, and therefore, repeated descriptions of them will be omitted.

[0025] Figure 1 This is a schematic diagram of an optional embodiment of the display panel provided in this invention. Figure 2 for Figure 1 An optional top view of the aforementioned display panel. (See diagram below.) Figure 1 As shown, the display panel 00 includes a substrate 01, a pixel definition layer 03, and light-emitting units 04. The pixel definition layer 03 is located on one side of the substrate 01 and includes multiple pixel openings 031, which define the light-emitting units 04. It should be noted that the pixel opening 031 defining the light-emitting unit 04 indicates that a light-emitting unit 04 exists at the location of the pixel opening 031. Generally, the pixel opening 031 can be equivalent to the size of the light-emitting unit. (Continue to refer to...) Figure 1The display panel 00 also includes a light filter layer 07, located on the side of the light-emitting unit 04 away from the substrate 01. The light filter layer 07 includes a black matrix 071, which includes black matrix openings 072, corresponding to the light-emitting units 04. It should be noted that the correspondence between the black matrix openings 072 and the light-emitting units 04 can mean one light-emitting unit 04 corresponds to one black matrix opening 072, or one black matrix opening 072 can correspond to multiple light-emitting units 04. Furthermore, the emitted light colors of the multiple light-emitting units 04 corresponding to one black matrix opening 072 can be the same or different. Optionally, the black matrix 071 includes a light-absorbing material, which can be a black light-absorbing material or a structure formed by overlapping different colored color resist materials. (Continue to refer to...) Figure 1 The display panel 00 includes a light extraction layer 08, located on the side of the light-emitting unit 04 away from the substrate 01. The light extraction layer 08 includes a first matching layer 081 and a second matching layer 083, with the first matching layer 081 located on the side of the second matching layer 083 closer to the substrate 01. The refractive index of the first matching layer 081 is lower than that of the second matching layer 083. The first matching layer 081 includes a light extraction opening 082, which is correspondingly positioned to the light-emitting unit 04. It should be noted that the corresponding positioning of the light extraction opening 082 and the light-emitting unit 04 can mean one light-emitting unit 04 corresponds to one light extraction opening 082, or one light extraction opening 082 can correspond to multiple light-emitting units 04. Furthermore, the colors of the light emitted by the multiple light-emitting units 04 corresponding to one light extraction opening 082 can be the same or different.

[0026] Optionally, the display panel further includes an array layer 02, located between the pixel definition layer 03 and the substrate 01. The array layer 02 includes multiple thin-film transistors, each including a source / drain electrode 02S / 02D, a gate electrode 02G, and an active layer 02A. This application only illustrates a technical solution with one thin-film transistor. It is understood that the number of thin-film transistors can be arbitrary, and the specific number can be set according to the specific requirements of the display panel. This embodiment does not impose specific limitations on this.

[0027] Combination Figure 1 and Figure 2The orthographic projection of pixel aperture 031 onto substrate 01 is first projection 0310, and the geometric center of first projection 0310 is first center O1; the orthographic projection of black matrix aperture 072 onto substrate 01 is second projection 0720, and the geometric center of second projection 0720 is second center O2; the orthographic projection of light extraction aperture 082 onto substrate 01 is third projection 0820, and the geometric center of third projection 0820 is third center O3, wherein second center O2 and third center O3 do not coincide. Compared to existing technologies, the light extraction layer 08 improves the light extraction efficiency of the display panel 00. In the light extraction layer 08 and the filter layer 07, the third center O3 of the light extraction opening 082 and the second center O2 of the black matrix opening 072 do not coincide. The light extraction opening 082 and the black matrix opening 072 have different offset positions. This not only ensures the light extraction efficiency of the display panel 00 by utilizing the light extraction layer 08, but also allows for the adjustment of viewing angle brightness by utilizing the position of the color resist unit in the filter layer 07 through the non-complete coincidence of the black matrix opening 072 and the light extraction opening 082, thereby improving the directional color difference phenomenon caused by the light extraction structure. In addition, the alignment deviation between the light extraction opening 082 and the black matrix opening 072 reduces the impact of process fluctuations on light efficiency, thereby improving the optical differences in viewing angles in different directions of the display panel, improving the light extraction effect of the display panel, and ensuring the display effect of the display panel.

[0028] Continue to refer to Figure 1 and Figure 2 Along the direction from one light-emitting unit to another light-emitting unit, the distance from the second center O2 to the edge of the second projection 0720 on both sides is d1, and the distance from the third center O3 to the edge of the third projection 0820 on both sides is d2. That is, along the direction from the first light-emitting unit to another light-emitting unit, the distance from the second center O2 to the edge of the second projection 0720 is equal, and the distance from the third center O3 to the edge of the third projection 0820 is equal.

[0029] like Figure 1 As shown, the light-emitting unit 04 includes an anode 040, a light-emitting material layer, and a cathode 05, wherein the anode 040 is made of ITO / Ag / ITO, and the cathode 05 is made of a magnesium-silver alloy. In this embodiment, an organic light-emitting diode (OLED) can be selected to fabricate the light-emitting unit 04. Alternatively, the light-emitting unit 04 can be configured as a micro light-emitting diode (Micro-LED) or a quantum dot light-emitting diode (QLED).

[0030] Optionally, the display panel 00 further includes a thin-film encapsulation layer 06, which is located between the light modulation structure and the light-emitting unit 04. Optionally, the thin-film encapsulation layer 06 may include one, two, or three or more film layers, and may include alternating organic and inorganic layers. In the display panel provided in this embodiment, the substrate 01 is a flexible substrate with bendable characteristics, and optionally, the thin-film encapsulation layer 06 has good bendability. The display panel provided in this embodiment can be bent and folded. This embodiment does not impose specific limitations on the specific materials or film layer structures of the thin-film encapsulation layer 06.

[0031] Optionally, the filter layer is located on the side of the light extraction layer near the substrate, and along the first direction, the width of the black matrix opening is greater than the width of the light extraction opening; the first direction is the direction from one light-emitting unit to another light-emitting unit.

[0032] Continue to refer to Figure 1 and Figure 2 The filter layer 07 is located on the side of the light extraction layer 08 near the substrate 01. Along the first direction X, the width of the black matrix opening 072 is 2d1, and the opening of the light extraction opening 082 is 2d2, where d1 > d2. The first direction X is the direction from one light-emitting unit to another. That is, along the first direction, the width of the black matrix opening is greater than the width of the light extraction opening. Compared with the previous embodiment, in this embodiment, the filter layer 07 is closer to the light-emitting unit 04 than the light extraction layer 08, which can increase the light emission angle and reduce the reflectivity of the display panel. On the other hand, the width of the black matrix opening 072 being greater than the width of the light extraction opening 082 can ensure the light extraction efficiency of the light extraction layer, and the larger black matrix opening 072 can prevent the black matrix from absorbing the normally emitted light, thus ensuring the light emission efficiency.

[0033] Optionally, the filter layer is located on the side of the light extraction layer away from the substrate, and along the first direction, the width of the black matrix opening is greater than the width of the light extraction opening; the first direction is the direction from one light-emitting unit to another light-emitting unit.

[0034] Figure 3 This is a schematic diagram illustrating another optional implementation of the display panel provided in an embodiment of the present invention. (See diagram below.) Figure 3 As shown, the light extraction layer 08 is located between the filter layer 07 and the substrate 01. It can reduce the distance between the light extraction layer 08 and the light-emitting unit 04, and can deflect more large-angle light through the light extraction layer and convert it into small-angle light, thereby improving the light extraction efficiency.

[0035] It should be noted that the various embodiments in this invention can be combined with each other. The embodiments described later mainly focus on the light extraction layer being located on the side of the filter layer away from the light-emitting unit. However, these features are also applicable to display panels where the light extraction layer is located on the side of the filter layer closer to the light-emitting unit, and are also within the protection scope of this invention. This invention will not elaborate further.

[0036] Optionally, the second projection covers the third projection, and the area of ​​the second projection is larger than the area of ​​the third projection; along the first direction, the first center is located between the second center and the third center.

[0037] Figure 4 This is a schematic diagram of another optional implementation of the display panel provided in the embodiments of the present invention. Figure 5 This is another optional top view schematic diagram of the display panel provided in an embodiment of the present invention. (See attached diagram.) Figure 4 and Figure 5 As shown, the second projection 0720 covers the third projection 0820, and the area of ​​the second projection 0720 is larger than that of the third projection 0820. Along the first direction X, the first center O1 is located between the second center O2 and the third center O3. In other words, the first center O1 is located between the second center O2 and the third center O3, which means that the center of the pixel opening 031 is located between the center of the black matrix opening 072 and the center of the light extraction layer opening 082. The offset direction of the black matrix opening 072 relative to the pixel opening 031 is different from the offset direction of the light extraction layer opening 082 relative to the pixel opening 031. The distance from the first center O1 to the edges of the two first projections 0310 is d3, that is, along the direction from one light-emitting unit to another, the distance from the first center O1 to the edge of the first projection 0310 is equal.

[0038] Optional, such as Figure 4 and Figure 5 As shown, when the light extraction opening 082 is displaced by a distance relative to the pixel opening 031 along the first direction X, and the black matrix opening 072 is displaced by a distance relative to the pixel opening 031 along the opposite direction of the first direction, compared with the aforementioned embodiment, the light extraction opening 082 and the black matrix opening 072 are offset in different directions, avoiding the risk of the light extraction opening and the black matrix opening being offset in the same direction, and reducing the problem of decreased yield and display quality of the display panel caused by excessive viewing angle deviation in a certain direction.

[0039] Optionally, the offset distance of the light extraction opening 082 relative to the pixel opening 031 along the first direction X is equal to the offset distance of the black matrix opening 072 relative to the pixel opening 031 along the opposite direction of the first direction.

[0040] Optionally, the first projection has a first axis of symmetry passing through the first center, the second projection has a second axis of symmetry passing through the second center, and the third projection has a third axis of symmetry passing through the third center; along the first direction, the first axis of symmetry is located between the second axis of symmetry and the third axis of symmetry.

[0041] Continue to refer to Figure 4 and Figure 5 The first projection 0310 has a first axis of symmetry AS1 passing through the first center O1, the second projection 0720 has a second axis of symmetry AS2 passing through the second center O2, and the third projection 0820 has a third axis of symmetry AS3 passing through the third center O3. Along the first direction X, the first axis of symmetry AS1 is located between the second axis of symmetry AS2 and the third axis of symmetry AS3. In other words, the first axis of symmetry AS1 being located between the second axis of symmetry AS2 and the third axis of symmetry AS3 means that the center of the pixel opening 031 is located between the center of the black matrix opening 072 and the center of the light extraction layer opening 082, and the offset direction of the black matrix opening 072 relative to the pixel opening 031 is different from the offset direction of the light extraction layer opening 082 relative to the pixel opening 031. Compared with the aforementioned embodiment, the light extraction opening 082 and the black matrix opening 072 are offset in different directions, avoiding the risk of the light extraction opening and the black matrix opening being offset in the same direction, and reducing the problem of decreased yield and display quality of the display panel due to excessive viewing angle offset in a certain direction.

[0042] Figure 6 This is another optional top view schematic diagram of the display panel provided in an embodiment of the present invention. To more clearly describe this embodiment, Figure 6 Other features are omitted and not described further. In the direction perpendicular to the display panel, Figure 6 The illustrations show the cases where pixel opening 031, light extraction opening 082, and black matrix opening 072 are rounded rectangles. However, these openings can also be other shapes, such as circles or ellipses, and are not limited by this invention. The areas of light extraction opening 082 and pixel opening 031 are equal. The offset distance of light extraction opening 082 relative to pixel opening 031 in the opposite direction of the first direction X is Q0, which is the distance Q0 from light extraction opening 082 to pixel opening 031 in the first direction X. Optionally, Q0 is less than or equal to 1 μm; for example, Q0 = 0.5 μm. Compared to the previous embodiments, while ensuring the light extraction capability of the light extraction layer, the size of light extraction opening 082 is equal to or approximately equal to the size of pixel opening 031. The same exposure and development process can be used when preparing the openings, saving costs.

[0043] Figure 7 This is another optional top view schematic diagram of a display panel provided in an embodiment of the present invention. Optionally, such as... Figure 7As shown, along the first direction X, the second projection 0720 corresponding to the black matrix opening 072 includes a first black matrix edge 072A and a second black matrix edge 072B arranged opposite each other. The shortest distance from the first black matrix edge 072A to the first axis of symmetry AS1 is m1, and the shortest distance from the second black matrix edge 072B to the first axis of symmetry AS1 is m2. Along the first direction X, the third projection 0820 corresponding to the light extraction opening 082 includes a first light extraction edge 082A and a second light extraction edge 082B arranged opposite each other. The first light extraction edge 082A and the first black matrix edge 072A are located on the same side of the first axis of symmetry. The shortest distance from the first light extraction edge 082A to the first axis of symmetry AS1 is n1, and the shortest distance from the second light extraction edge 082B to the first axis of symmetry AS1 is n2. Wherein, (m1-m2)·(n1-n2) < 0. For example, if n1 > n2, then m1 < m2. Figure 7 As shown, n1 > n2, the light extraction opening 082 has an offset distance relative to the pixel opening 031 in the opposite direction of the first direction X, and m1 < m2, the black matrix opening 072 has an offset distance relative to the pixel opening 031 in the first direction X. That is, relative to the pixel opening 031, the black matrix opening 072 and the light extraction opening are offset in different directions, avoiding the risk of the light extraction opening and the black matrix opening being offset in the same direction, reducing the problem of decreased yield and display quality of the display panel due to excessive viewing angle deviation in a certain position; in addition, after generating alignment deviation by using the light extraction opening 082 and the black matrix opening 072, the influence of process fluctuations on light efficiency can be reduced, thereby improving the situation of viewing angle optical differences in different directions of the display panel, improving the light emission effect of the display panel, and ensuring the display effect of the display panel.

[0044] Optional, continue to refer to Figure 4The distance from the second axis of symmetry AS2 to the first axis of symmetry AS1 is the black matrix offset distance, and the distance from the third axis of symmetry AS3 to the first axis of symmetry AS1 is the light extraction offset distance. The ratio of the light extraction offset distance to the black matrix offset distance corresponding to the same light-emitting unit 04 is the relative offset distance corresponding to that light-emitting unit. The light-emitting unit 04 includes a first light-emitting unit 04A and a second light-emitting unit 04B. The area of ​​the first light-emitting unit 04A is S1, and the relative offset distance of the first light-emitting unit is k1. The area of ​​the second light-emitting unit is S2, and the relative offset distance of the second light-emitting unit is k2, where (S1-S2)·(K1-K2)>0. The applicant has found through research that the smaller the area of ​​the light-emitting unit, the greater the light enhancement ratio of the corresponding light extraction layer, and the more obvious and faster the corresponding viewing angle attenuation will be. Therefore, in this embodiment, the relatively offset distance is set to be smaller for the area of ​​the light-emitting unit. By setting the relatively offset distance to be smaller, the offset of the light extraction opening relative to the pixel opening is reduced, avoiding attenuation fluctuations caused by the offset of the light extraction opening, and balancing the inconsistent viewing angle brightness attenuation and brightness differences.

[0045] Optionally, S1 > S2, the area of ​​the first light-emitting unit 04A is larger than the area of ​​the second light-emitting unit 04B, the black matrix offset distance of the first light-emitting unit 04A is equal to the black matrix offset distance of the second light-emitting unit 04B, and the light extraction offset distance of the first light-emitting unit 04A is greater than the light extraction offset distance of the second light-emitting unit 04B. In this embodiment, without changing the offset distance of the black matrix opening, the light extraction offset distance of the smaller light-emitting unit is set to be smaller, reducing the attenuation degree of the light extraction opening on the smaller light-emitting unit, which can balance the inconsistent attenuation of viewing angle brightness and balance the brightness difference.

[0046] Optionally, S1 > S2, the area of ​​the first light-emitting unit 04A is larger than the area of ​​the second light-emitting unit 04B, the light extraction offset distance of the first light-emitting unit 04A is equal to the light extraction offset distance of the second light-emitting unit 04B, and the black matrix offset distance of the first light-emitting unit 04A is smaller than the black matrix offset distance of the second light-emitting unit 04B. In this embodiment, the offset distance of the light extraction opening is kept constant, and the position of the black matrix opening is used to adjust the attenuation of different light-emitting units. A larger black matrix offset distance corresponds to a larger displacement of the black matrix opening relative to the pixel opening. The larger the black matrix opening offset, the stronger the brightness adjustment capability. The larger the misaligned black matrix opening is used to compensate for the brightness attenuation caused by the light extraction layer of the smaller light-emitting unit.

[0047] Optionally, the first light-emitting unit 04A is a red light-emitting unit and the second light-emitting unit is a green light-emitting unit; or, the first light-emitting unit is a blue light-emitting unit and the second light-emitting unit is a green light-emitting unit.

[0048] Figure 8This is a schematic diagram illustrating another optional embodiment of the display panel provided in this invention. (See diagram below.) Figure 8 As shown, the display panel 00 includes a first display area AA1 and a second display area AA2. The light transmittance of the first display area AA1 is greater than that of the second display area AA2. The first light-emitting unit 04A includes a first sub-light-emitting unit 04A1 and a second sub-light-emitting unit 04A2 of the same color. The area of ​​the first sub-light-emitting unit 04A1 is S11, and the area of ​​the second sub-light-emitting unit 04A2 is S12, where S11 > S12, meaning the area of ​​the first sub-light-emitting unit 04A1 is greater than the area of ​​the second sub-light-emitting unit 04A2. The relative offset distance of the first sub-light-emitting unit 04A1 is k11, and the relative offset distance of the second sub-light-emitting unit 04A2 is k12; where k11 < k12. In this embodiment, the smaller area of ​​the light-emitting unit corresponds to a smaller relative offset distance. By setting a smaller relative offset distance, the offset of the light extraction opening relative to the pixel opening is reduced, avoiding attenuation fluctuations caused by the offset of the light extraction opening. This balances the inconsistent brightness attenuation of the same color light-emitting units from different viewing angles, thus balancing brightness differences. The first display area AA1 can be equipped with a light sensor, such as a camera, to realize the photo-taking function. It should be noted that this embodiment only describes the case where the area of ​​the first sub-light-emitting unit 04A1 in the first display area AA1 is larger than the area of ​​the second sub-light-emitting unit 04A2 in the second display area AA2, but the present invention is not limited thereto. Optionally, the area of ​​the light-emitting unit in the first display area AA1 is smaller than the area of ​​the light-emitting unit in the second display area AA2.

[0049] Figure 9 This is a top view schematic diagram of another optional embodiment of the display panel provided in this invention. (See attached diagram.) Figure 9 As shown, along the second direction Y, the first center O1 is located between the second center O2 and the third center O3, and the second direction Y intersects with the first direction X. This can be understood as the light extraction aperture 082 and the black matrix aperture 072 being offset in different directions along the second direction Y. This avoids the risk of the light extraction aperture 082 and the black matrix aperture 072 shifting in the same direction along the Y direction, thus preventing issues such as reduced display panel yield and display quality due to excessive viewing angle offset in a certain direction.

[0050] Continue to refer to Figure 9The angle θ1 between the direction from the first center O1 to the second center O2 and the direction from the first center O1 to the third center O3 is 90° < θ1 < 180°. Maintaining the angle θ1 between the directions from the first center O1 to the second center O2 and the first center O1 to the third center O3 between 90° and 180° ensures that the light extraction aperture 082 and the black matrix aperture have components in opposite directions in each direction. The light extraction aperture 082 and the black matrix aperture 072 are offset in different directions, avoiding the risk of the light extraction aperture and the black matrix aperture offsetting in the same direction, and reducing the problem of decreased display panel yield and display quality due to excessive viewing angle offset in a certain direction. Optionally, θ1 can be equal to 180°, in which case the light extraction aperture 082 and the black matrix aperture 072 are offset in different directions only in one direction.

[0051] Optionally, the light-emitting unit includes a first color light-emitting unit, which includes a first sub-unit and a second sub-unit. The direction from the first center of the pixel opening corresponding to the first sub-unit to the third center of the light extraction opening corresponding to the first sub-unit is a third direction. The direction from the second center of the pixel opening corresponding to the second sub-unit to the third center of the light extraction opening corresponding to the second sub-unit is a fourth direction. The angle between the third direction and the fourth direction is θ2, where 90° < θ2 ≤ 180°.

[0052] Figure 10 This is a top view schematic diagram of another optional embodiment of the display panel provided in this invention. (See attached diagram.) Figure 10 As shown, the light-emitting unit 04 includes a first color light-emitting unit 04C, which includes a first sub-unit 04C1 and a second sub-unit 04C2. The first center O1 of the pixel opening 031 of the first sub-unit 04C1 points to the third center O3 of the light extraction opening 082 of the first sub-unit 04C1, forming a third direction. The first center O1 of the pixel opening 031 of the second sub-unit 04C2 points to the third center O3 of the light extraction opening of the second sub-unit 04C2, forming a fourth direction. The angle between the third and fourth directions is θ2, where 90° < θ2 ≤ 180°. The light extraction layer openings corresponding to the same color light-emitting units have different offset directions relative to the pixel openings, ensuring that each direction of the light extraction opening has an opposite offset component. This reduces the problem of decreased display panel yield and display quality caused by excessive viewing angle offset in a certain direction. Furthermore, it can reduce the impact of process fluctuations on light efficiency, thereby improving the optical differences in viewing angles of the display panel in different directions. Optionally, θ2 = 180° corresponds to the light extraction opening 082 corresponding to the first subunit 04C1 and the light extraction opening 082 corresponding to the second subunit 04C2 being offset in opposite directions.

[0053] Optionally, in the first sub-unit, the distance from the first center to the third center is D1; ​​in the second sub-unit, the distance from the first center to the third center is D2, where D1 = D2. Compared to the previous embodiment, this embodiment controls the offset range of the light extraction aperture relative to the pixel aperture within a preset range, and controls the preset distances to be equal, D1 = D2, which can reduce the impact of process fluctuations on light efficiency. Optionally, the preset range D1 = D2 = 0.5 μm.

[0054] Optionally, the angle between the direction from the second center to the third center in the first sub-unit and the direction from the second center to the third center in the second sub-unit is θ3; where 90°<θ3≤180°. Figure 11 This is a top view schematic diagram of another optional embodiment of the display panel provided in this invention. (See attached diagram.) Figure 11 As shown, the angle between the direction from the second center O2 to the third center O3 in the first sub-unit 04C1 and the direction from the second center O2 to the third center O3 in the second sub-unit 04C2 is θ3; where 90°<θ3≤180°. The black matrix openings corresponding to the same color light-emitting units have different offset directions relative to the pixel openings, ensuring that the black matrix openings in each direction have opposite offset components. This reduces the problem of decreased display panel yield and display quality caused by excessive viewing angle offset in a certain direction. Furthermore, it can reduce the impact of process fluctuations on light efficiency, thereby improving the optical differences in viewing angles in different directions of the display panel. Optionally, θ3=180°, which is equivalent to the black matrix opening 072 corresponding to the first sub-unit 04C1 and the black matrix opening 072 corresponding to the second sub-unit 04C2 being offset in opposite directions.

[0055] Figure 12 This is a top view schematic diagram of another optional embodiment of the display panel provided in this invention. (See attached diagram.) Figure 12 As shown, optionally, the first center O1 of the pixel opening 031 corresponding to the first sub-unit 04C1 points to the second center O2 of the black matrix opening 072 corresponding to the first sub-unit 04C1 in a fifth direction, and the second center O2 of the pixel opening 031 corresponding to the second sub-unit 04C2 points to the third center O3 of the black matrix opening 072 corresponding to the second sub-unit 04C2 in a sixth direction; wherein, the fifth direction is opposite to the third direction, and the sixth direction is opposite to the fourth direction. In this embodiment, for different light-emitting units of the same color, the light extraction opening 082 and the black matrix opening 072 are offset in different directions, avoiding the risk of the light extraction opening and the black matrix opening being offset in the same direction, and reducing the problem of decreased yield and display quality of the display panel due to excessive viewing angle deviation in a certain direction.

[0056] Optionally, in the first sub-unit, the distance from the first center to the second center is D3, and in the second unit, the distance from the first center to the second center is D4, where D3 = D4. This embodiment controls the offset range of the black matrix opening relative to the pixel opening within a preset range, and controls the preset distances to be equal, D3 = D4, which can reduce the impact of process fluctuations on light efficiency. Optionally, the preset range D4 = D3 = 0.5 μm.

[0057] Optionally, along the first direction, the first unit group and the second unit group are arranged alternately. The first unit group includes N1 first sub-units, and the second unit group includes N2 second sub-units, where N1≥1 and N2≥1. That is, along the first direction, the light-emitting units with different offsets of the light extraction aperture and the black matrix aperture are arranged in an alternating and interleaved manner. Compared to a single method to improve the viewing angle, this embodiment can further balance the viewing angle distortion of the entire display panel, preventing severe viewing angle distortion in certain areas of the display panel. Optionally, N1=N2.

[0058] Optionally, along the second direction, the third and fourth unit groups are arranged alternately. The third unit group includes n1 first sub-units, and the fourth unit group includes n2 second sub-units, where n1≥1, n2≥1, and n1≠N1, n2≠N2. That is, along the second direction, light-emitting units with different offsets in the light extraction aperture and the black matrix aperture are arranged in an alternating and interleaved manner. Compared to a single method to improve the viewing angle, this embodiment further balances the viewing angle color shift of the entire display panel, preventing severe viewing angle color shift in certain areas of the display panel. Furthermore, the dual alternation between the first and second directions ensures that each direction has a compensation amount for color shift, guaranteeing display quality. Optionally, n1=n2.

[0059] Optionally, the first color emitting unit is a green emitting unit. Generally, the area of ​​a green emitting unit is smaller than that of a red emitting unit and a blue emitting unit. The smaller area of ​​the green emitting unit results in more severe viewing angle attenuation. Optionally, the display panel only uses the settings of this invention for the green emitting unit.

[0060] The present invention also provides a display device. Figure 13 This is a schematic diagram of a display device provided in an embodiment of the present invention. The display device 000 includes a display panel 00 provided in any embodiment of the present invention. The display devices provided by the present invention include, but are not limited to, the following categories: televisions, laptops, desktop monitors, tablet computers, digital cameras, mobile phones, smart bracelets, smart glasses, in-vehicle displays, medical devices, industrial control equipment, touch interactive terminals, etc.

[0061] As can be seen from the above embodiments, the display panel and display device provided by the present invention achieve at least the following beneficial effects:

[0062] In the light extraction layer and the filter layer, the second center of the light extraction opening and the third center of the black matrix opening do not coincide. The light extraction opening and the black matrix opening have different offset positions. This not only ensures the light extraction efficiency of the display panel by utilizing the light extraction layer, but also allows for the adjustment of viewing angle brightness by using the position of the color resist unit in the filter layer through the non-perfect coincidence of the black matrix opening and the offset position of the black matrix opening. This improves the directional color difference phenomenon caused by the light extraction structure. In addition, the alignment deviation between the light extraction opening and the black matrix opening reduces the impact of process fluctuations on light efficiency, thereby improving the optical differences in viewing angles in different directions of the display panel, enhancing the light extraction effect of the display panel, and ensuring the display effect of the display panel.

[0063] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A display panel, characterized in that, include: Substrate; A pixel definition layer and a light-emitting unit are provided. The pixel definition layer is located on one side of the substrate and includes a plurality of pixel openings that define the light-emitting unit. The light-emitting unit is provided with a filter layer and a light-extraction layer, which are located on the side of the light-emitting unit away from the substrate. The filter layer includes a black matrix with openings corresponding to the light-emitting unit. The light-extraction layer includes a first matching layer and a second matching layer, with the first matching layer located on the side of the second matching layer closer to the substrate. The first matching layer includes light-extraction openings corresponding to the light-emitting unit. The orthographic projection of the pixel opening onto the substrate is a first projection, and the geometric center of the first projection is a first center; The orthographic projection of the black matrix opening onto the substrate is a second projection, and the geometric center of the second projection is a second center; the orthographic projection of the light extraction opening onto the substrate is a third projection, and the geometric center of the third projection is a third center. The second center and the third center do not overlap; The second projection covers the third projection, and the area of ​​the second projection is larger than the area of ​​the third projection; along the first direction, the first center is located between the second center and the third center; the first direction is the direction from one light-emitting unit to another light-emitting unit.

2. The display panel according to claim 1, characterized in that, The filter layer is located on the side of the light extraction layer closer to the substrate, and along the first direction, the width of the black matrix opening is greater than the width of the light extraction opening.

3. The display panel according to claim 1, characterized in that, The first projection has a first axis of symmetry passing through the first center, the second projection has a second axis of symmetry passing through the second center, and the third projection has a third axis of symmetry passing through the third center; along the first direction, the first axis of symmetry is located between the second axis of symmetry and the third axis of symmetry.

4. The display panel according to claim 3, characterized in that, Along the first direction, the second projection corresponding to the opening of the black matrix includes a first black matrix edge and a second black matrix edge that are arranged opposite to each other. The shortest distance from the first black matrix edge to the first axis of symmetry is m1, and the shortest distance from the second black matrix edge to the first axis of symmetry is m2. Along the first direction, the third projection corresponding to the light extraction opening includes a first light extraction edge and a second light extraction edge arranged opposite to each other. The first light extraction edge and the first black matrix edge are located on the same side of the first axis of symmetry. The shortest distance from the first light extraction edge to the first axis of symmetry is n1, and the shortest distance from the second light extraction edge to the first axis of symmetry is n2; wherein, (m1-m2)·(n1-n2)<0.

5. The display panel according to claim 4, characterized in that, The distance from the second axis of symmetry to the first axis of symmetry is the black matrix offset distance, and the distance from the third axis of symmetry to the first axis of symmetry is the light extraction offset distance. The ratio of the light extraction offset distance to the black matrix offset distance corresponding to the same light-emitting unit is the relative offset distance corresponding to that light-emitting unit. The light-emitting unit includes a first light-emitting unit and a second light-emitting unit. The area of ​​the first light-emitting unit is S1, and the relative offset distance of the first light-emitting unit is k1. The area of ​​the second light-emitting unit is S2, and the relative offset distance of the second light-emitting unit is k2. (S1-S2)·(K1-K2)>0.

6. The display panel according to claim 5, characterized in that, S1 > S2; The black matrix offset distance of the first light-emitting unit is equal to the black matrix offset distance of the second light-emitting unit, and the light extraction offset distance of the first light-emitting unit is greater than the light extraction offset distance of the second light-emitting unit.

7. The display panel according to claim 5, characterized in that, S1 > S2; The light extraction offset distance of the first light-emitting unit is equal to the light extraction offset distance of the second light-emitting unit, and the black matrix offset distance of the first light-emitting unit is less than the black matrix offset distance of the second light-emitting unit.

8. The display panel according to claim 5, characterized in that, The first light-emitting unit includes a first sub-light-emitting unit and a second sub-light-emitting unit of the same color. The area of ​​the first sub-light-emitting unit is S11, and the area of ​​the second sub-light-emitting unit is S12, where S11 > S12. The relative offset distance between the first sub-light-emitting unit and the second sub-light-emitting unit is k11, where k11 < k12.

9. The display panel according to claim 1, characterized in that, Along the second direction, the first center is located between the second center and the third center, and the second direction intersects with the first direction.

10. The display panel according to claim 9, characterized in that, The angle θ1 between the direction from the first center to the second center and the direction from the first center to the third center is 90° < θ1 ≤ 180°.

11. The display panel according to claim 1, characterized in that, The light-emitting unit includes a first color light-emitting unit, the first color light-emitting unit includes a first sub-unit and a second sub-unit, the first center of the pixel opening of the first sub-unit pointing to the third center of the light extraction opening of the first sub-unit is a third direction, and the first center of the pixel opening of the second sub-unit pointing to the third center of the light extraction opening of the second sub-unit is a fourth direction. Wherein, the angle between the third direction and the fourth direction is θ2, and 90°<θ2≤180°.

12. The display panel according to claim 11, characterized in that, In the first sub-unit, the distance from the first center to the third center is D1; In the second sub-unit, the distance from the first center to the third center is D2; D1 = D2.

13. The display panel according to claim 11, characterized in that, The angle between the direction from the second center to the third center in the first sub-unit and the direction from the second center to the third center in the second sub-unit is θ3; Where 90°<θ3≤180°.

14. The display panel according to claim 11, characterized in that, The first center of the pixel opening corresponding to the first sub-unit points to the second center of the black matrix opening corresponding to the first sub-unit in the fifth direction, and the second center of the pixel opening corresponding to the second sub-unit points to the third center of the black matrix opening corresponding to the second sub-unit in the sixth direction; The fifth direction is opposite to the third direction, and the sixth direction is opposite to the fourth direction.

15. The display panel according to claim 14, characterized in that, In the first sub-unit, the distance from the first center to the second center is D3; In the second sub-unit, the distance from the first center to the second center is D4; D3 = D4.

16. The display panel according to claim 15, characterized in that, Along the first direction, the first unit group and the second unit group are arranged alternately. The first unit group includes N1 first sub-units, and the second unit group includes N2 second sub-units, where N1≥1 and N2≥1.

17. The display panel according to claim 16, characterized in that, Along the second direction, the third and fourth unit groups are arranged alternately. The third unit group includes n1 first sub-units, and the fourth unit group includes n2 second sub-units. n1≥1, n2≥1, and n1≠N1, n2≠N2.

18. The display panel according to claim 11, characterized in that, The first color emitting unit is a green emitting unit.

19. The display panel according to claim 1, characterized in that, The filter layer is located on the side of the light extraction layer away from the substrate. Along the first direction, the width of the black matrix opening is greater than the width of the light extraction opening. The first direction is the direction from one light-emitting unit to another light-emitting unit.

20. A display device, characterized in that, Includes the display panel as described in any one of claims 1-19.

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