Display panel and display device

Abstract

The application discloses a display panel and a display device, the display panel comprising a substrate, a pixel definition layer and a light adjusting layer, the pixel definition layer being located on one side of the substrate, the pixel definition layer comprising a pixel opening; the light adjusting layer being located on the side of the pixel definition layer away from the substrate, the light adjusting layer comprising a light adjusting opening, the light adjusting opening being arranged correspondingly to the pixel opening; the boundary of the orthographic projection of the side of the light adjusting opening close to the substrate on the substrate being composed of the outermost boundaries of at least two partially overlapped virtual openings, the geometric center of the virtual opening and the geometric center of the light adjusting opening not overlapping. The technical scheme of the application can ensure that the display panel has a high light output efficiency.

Description

TECHNICAL FIELD

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

[0002] An organic light emitting diode (OLED, Organic Light Emitting Display) display has the advantages of high brightness, high efficiency, wide viewing angle, self-luminous, full solid, ultra-thin and ultra-light, simple manufacturing process, fast response speed and the like, and becomes the research focus in the industry.

[0003] With the diversification of display functions, the structure of the display panel is becoming more and more complex, and the number of film layers is gradually increasing, which leads to an increase in light loss when light passes through each film layer, a decrease in light extraction efficiency, for example, part of the light with a large angle may be reflected back to the substrate side due to total reflection between the film layers, and cannot be emitted, resulting in a decrease in light extraction efficiency. Therefore, how to improve the light extraction efficiency is a problem to be solved. SUMMARY

[0004] The present application provides a display panel and a display device to ensure that the display panel has high light extraction efficiency.

[0005] According to a first aspect of the present application, a display panel is provided, comprising:

[0006] a substrate;

[0007] a pixel definition layer located on one side of the substrate; the pixel definition layer comprises a pixel opening;

[0008] a light adjusting layer located on a side of the pixel definition layer away from the substrate; the light adjusting layer comprises a light adjusting opening, the light adjusting opening is arranged corresponding to the pixel opening; a boundary of a normal projection of a side of the light adjusting opening close to the substrate on the substrate is composed of outermost boundaries of at least two partially overlapped virtual openings, and a geometric center of the virtual opening does not overlap with a geometric center of the light adjusting opening.

[0009] According to a second aspect of the present application, a display device is provided, comprising the display panel provided in the first aspect.

[0010] The technical scheme of the embodiment of the present application sets the light adjusting opening corresponding to the pixel opening in the light adjusting layer, and sets the boundary of the normal projection of the side of the light adjusting opening close to the substrate on the substrate to be composed of the outermost boundaries of the at least two partially overlapped virtual openings, and the geometric center of the virtual opening does not overlap with the geometric center of the light adjusting opening, so that the boundary of the light adjusting opening can be expanded outward along at least one direction, thereby reducing the influence of the actual position deviation of the light adjusting opening caused by process fluctuation on the light extraction efficiency, and ensuring that the display panel has high light extraction efficiency.

[0011] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a cross-sectional structural diagram of an existing display panel;

[0014] Figure 2 This is a partial top view of an existing display panel under ideal manufacturing conditions;

[0015] Figure 3 This is a partial top-view structural diagram of an existing display panel when there are process fluctuations.

[0016] Figure 4 This is a top view structural diagram of a display panel provided in an embodiment of the present invention;

[0017] Figure 5 It is along Figure 4 A cross-sectional view of the display panel captured by QQ.

[0018] Figure 6 yes Figure 4 A magnified structural diagram of region P in the middle;

[0019] Figure 7 Is with Figure 6 A schematic diagram of the structure of the virtual opening corresponding to the mid-light dimming aperture;

[0020] Figure 8 yes Figure 4 Another enlarged structural diagram of region P in the middle;

[0021] Figure 9 yes Figure 4 Another enlarged structural diagram of region P in the middle;

[0022] Figure 10 yes Figure 4 Another enlarged structural diagram of region P in the middle;

[0023] Figure 11 yes Figure 4 Another enlarged structural diagram of region P in the middle;

[0024] Figure 12 is another cross-sectional structure diagram of a display panel taken along Figure 4 QQ' in the middle;

[0025] Figure 13 is a structure diagram of a display device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should fall within the scope of protection of the present application.

[0027] Figure 1 is a cross-sectional structure diagram of a display panel, as shown in Figure 1 , the display panel includes a pixel definition layer 3' on one side of a substrate 1', the pixel definition layer 3' includes a pixel opening 31', and a light emitting unit 2' is arranged in the pixel opening 31'. In addition, the display panel usually also includes at least one film layer of a thin film encapsulation layer, a touch layer, a polarizer and a cover plate on the side of the light emitting unit 2' away from the substrate 1', and the light emitted by the light emitting unit 2' needs to pass through these film layers to be received by the human eye. However, due to the difference in refractive index between these film layers caused by the different materials used, part of the light rays with large angles will be totally reflected inside the display panel (for example, totally reflected at the interface between the touch layer and the polarizer) during the propagation process because they meet the total reflection condition, at this time, this part of light rays will be reflected back to the side of the substrate 1', and cannot be normally emitted, resulting in low light emission efficiency.

[0028] Referring to Figure 1 , in order to improve the light emission efficiency of the light emitting unit, a high refractive index layer 5' and a low refractive index layer 4' can be arranged on the side of the light emitting unit 2' away from the substrate 1', and a light adjusting opening 41' is formed in the low refractive index layer 4' corresponding to the pixel opening 31'. In this way, the light rays with large angles emitted by the light emitting unit 2' can be totally reflected at the interface between the high refractive index layer 5' and the low refractive index layer 4', adjusting the light rays with large angles to light rays with small angles, and then emitting the light rays with small angles from the display panel (as shown by the light path in Figure 1 ), avoiding the light rays with large angles from being reflected back to the side of the substrate 1' and unable to be normally emitted due to total reflection between the film layers such as the above-mentioned film layers, and realizing the improvement of the light emission efficiency. Wherein, the angle of the light ray can be understood as the included angle between the propagation direction of the light and the direction perpendicular to the plane where the substrate 1' is located, as shown in Figure 1As shown, by setting the high refractive index layer 5' and the low refractive index layer 4', and forming the light adjusting opening 41' in the low refractive index layer 4' corresponding to the pixel opening 31', the large-angle light with the exit angle of β can be adjusted to small-angle light with the exit angle of β', the total reflection phenomenon between the film layers such as the above-mentioned is reduced, and the light extraction efficiency is improved.

[0029] Figure 2 is a schematic diagram of a partial top view structure of the existing display panel in an ideal process state, as shown in the figure, Figure 2 in the ideal state, the light adjusting opening 41' is accurately aligned with the pixel opening 31', that is, the geometric center 411' of the light adjusting opening 41' is coincided with the geometric center 311' of the pixel opening 31', so as to ensure that the light of each direction with a large angle can be adjusted to have an exit angle under the action of the high refractive index layer 5' and the low refractive index layer 4', and then be emitted from the display panel, thereby improving the light extraction efficiency. However, as shown in the schematic diagram of a partial top view structure of the existing display panel when process fluctuation occurs, Figure 3 when process fluctuation occurs, for example, alignment deviation occurs between the mask and the substrate, which will cause the alignment deviation of the light adjusting opening 41' and the pixel opening 31', and the deviation of the geometric center 411' of the light adjusting opening 41' and the geometric center 311' of the pixel opening 31', and then affect the light extraction efficiency (which can be understood as the degree of improvement of the light extraction efficiency by the setting of the high refractive index layer 5' and the low refractive index layer 4').

[0030] To solve the above problems, the embodiment of the present application provides a display panel, which comprises a substrate, a pixel limiting layer and a light adjusting layer, the pixel limiting layer is located on one side of the substrate; the pixel limiting layer comprises a pixel opening; the light adjusting layer is located on the side of the pixel limiting layer away from the substrate; the light adjusting layer comprises a light adjusting opening, the light adjusting opening is arranged corresponding to the pixel opening; the boundary of the orthographic projection of the side of the light adjusting opening close to the substrate on the substrate is composed of the outermost boundary of at least two partially overlapped virtual openings, and the geometric center of the virtual opening is not overlapped with the geometric center of the light adjusting opening.

[0031] By using the above scheme, the boundary of the light adjusting opening can be expanded outward along at least one direction, so as to reduce the influence of the actual position deviation of the light adjusting opening caused by process fluctuation on the light extraction efficiency, and ensure that the display panel has high light extraction efficiency.

[0032] Figure 4 is a schematic diagram of a top view structure of a display panel provided by the embodiment of the present application, Figure 5 is a schematic diagram of a cross-sectional structure of the display panel taken along the line Figure 4 in the figure, Figure 6 is a schematic diagram of a cross-sectional structure of the display panel taken along the line Figure 4An enlarged structural diagram of the middle P region, showing the orthographic projection of the side of the pixel opening 120 close to the substrate on the substrate, and the orthographic projection of the side of the light adjustment opening 130 close to the substrate on the substrate, as shown in Figures 4-6 The display panel 10 provided by the embodiment of the present application includes a substrate 11, a pixel defining layer 12, and a light adjusting layer 13. The pixel defining layer 12 is located on one side of the substrate 11, and includes pixel openings 120. The light adjusting layer 13 is located on the side of the pixel defining layer 12 away from the substrate 11, and includes light adjustment openings 130, which are arranged correspondingly to the pixel openings 120. The boundary of the orthographic projection of the side of the light adjustment opening 130 close to the substrate 11 on the substrate 11 is composed of the outermost boundary of at least two partially overlapped virtual openings 3, and the geometric center 31 of the virtual opening 3 does not overlap with the geometric center 1301 of the light adjustment opening 130.

[0033] The pixel defining layer 12 functions to define pixels. Specifically, as shown in Figure 4 and Figure 5 The display panel 10 includes a light emitting unit layer, which includes a plurality of light emitting units 14, each corresponding to a sub-pixel. The plurality of light emitting units 14 can be arranged in a certain manner, Figure 4 for example, in a rectangular array, which is not limited in the embodiment of the present application. The pixel defining layer 12 includes a corresponding number of pixel openings 120, and the light emitting units 14 are formed in the pixel openings 120, Figure 5 only two pixel openings 120 in the pixel defining layer 12 are shown by way of example. The plurality of light emitting units can include at least two light emitting units of different light emitting colors, for example, red light emitting units with a red light emitting color, green light emitting units with a green light emitting color, and blue light emitting units with a blue light emitting color. Of course, the plurality of light emitting units can also include light emitting units of other light emitting colors, which are not limited in the embodiment of the present application.

[0034] As shown in Figure 5 The light emitting unit 14 mainly includes a light emitting functional layer 141, and an anode 142 and a cathode 143 located on opposite sides of the light emitting functional layer 141. In addition, the display panel 10 further includes a driving circuit layer 16 between the substrate 11 and the light emitting unit 14, which mainly includes a pixel circuit for driving the light emitting unit 14 to emit light, and a gate driving circuit and other circuit structures for controlling the timing of the operation of the pixel circuit, which are not limited in the embodiment of the present application, and can be set by the person skilled in the art.

[0035] The light adjustment layer 13 is used to adjust the light emission angle to improve light extraction efficiency. Specifically, the light adjustment layer 13 includes a dimming opening 130. By reasonably setting parameters such as the refractive index of the light adjustment layer 13, the size of the dimming opening 130, and the tilt angle of the sidewall, at least some large-angle light rays can undergo total internal reflection at the sidewall of the dimming opening 130 when passing through the light adjustment layer 13, thereby reducing the light emission angle (see reference). Figure 5 The light path shown avoids light returning to the substrate 11 due to total internal reflection between other film layers (such as the aforementioned touch layer and polarizer), thus preventing normal emission and improving light extraction efficiency. This embodiment does not specifically limit the film structure of the light adjustment layer 13, as long as it achieves the above-mentioned function.

[0036] Furthermore, such as Figure 6 As shown, in this embodiment, the boundary of the orthographic projection of the dimming opening 130 near the substrate 11 onto the substrate 11 is formed by the outermost boundaries of at least two partially overlapping virtual openings 3, and the geometric center 31 of the virtual opening 3 does not overlap with the geometric center 1301 of the dimming opening 130. In other words, in this embodiment, the dimming opening 130 is composed of at least two virtual openings 3 whose geometric centers are offset from the geometric center 1301 of the dimming opening 130. For example, Figure 7 Is with Figure 6 A schematic diagram of the structure of the virtual opening corresponding to the mid-light dimming aperture, combined with Figure 6 and Figure 7 As shown, the geometric center 31-1 of the virtual opening 3-1 is offset from the geometric center 1301 of the dimming opening 130, and the geometric center 31-2 of the virtual opening 3-2 is offset from the geometric center 1301 of the dimming opening 130. The virtual opening 3-1 and the virtual opening 3-2 have two intersection points A and B. Starting from intersection point A, the path clockwise passes through the outermost boundary of the virtual opening 3-2 to reach intersection point B, and then passes through the outermost boundary of the virtual opening 3-1 back to intersection point A, thus forming the boundary of the dimming opening 130 near the substrate. Compared to existing technologies, this configuration allows the boundary of the dimming opening 130 to expand outward. Therefore, even if process fluctuations occur during the formation of the dimming opening 130, causing the geometric center of the dimming opening 130 near the substrate 11 (hereinafter referred to as the geometric center 1301 of the dimming opening 130) to not coincide with the geometric center of the pixel opening 120 near the substrate 11 (hereinafter referred to as the geometric center 1201 of the pixel opening 120), it will not have a significant impact on the function of the dimming opening 130 in improving light efficiency, thus reducing the impact of process fluctuations on light extraction efficiency.

[0037] It should be noted that, Figure 6 and Figure 7The illustration is based on the example where all virtual openings 3 corresponding to the dimming opening 130 are circular and of equal size. In other embodiments, the virtual openings 3 corresponding to the dimming opening 130 can be of different shapes (e.g., including circles and squares) and can be of different sizes; this embodiment of the invention does not limit this.

[0038] As a feasible implementation method, the line connecting the geometric center 31 of the virtual opening 3 and the geometric center 1301 of the dimming opening 130 can be set to be parallel to the offset direction of the dimming opening 130 relative to the pixel opening 120. With this setting, the impact on light extraction efficiency when the dimming opening 130 is offset relative to the pixel opening 120 in this direction can be reduced, ensuring that the display panel has a high light extraction efficiency.

[0039] For example, such as Figure 6 As shown, the outer boundary of the dimming opening 130 is formed by the outermost boundaries of two virtual openings, namely virtual opening 3-1 and virtual opening 3-2 (represented by different types of dashed lines). The line connecting the geometric center 31-1 of virtual opening 3-1 and the geometric center 1301 of dimming opening 130, as well as the line connecting the geometric center 31-2 of virtual opening 3-2 and the geometric center 1301 of dimming opening 130, are both parallel to the x-direction. Figure 8 yes Figure 4 Another enlarged structural diagram of the P region shows an enlarged structural diagram of the P region of the display panel when process fluctuations occur, for comparison. Figure 6 and Figure 8 As can be seen, by adopting the technical solution of this embodiment of the invention, even if the actual position of the dimming opening 130 shifts along the x-direction (or the opposite direction of the x-direction in the figure) due to process fluctuations, it can still be ensured that the orthogonal projection of the side of the dimming opening 130 near the substrate 11 on the substrate 11 covers the orthogonal projection of the side of the pixel opening 120 near the substrate 11 on the substrate 11. This reduces the impact of process fluctuations on light extraction efficiency and ensures that the display panel has high light extraction efficiency. Of course, the number and arrangement of the virtual openings 3 used to form the outer boundary of the dimming opening 130 are not limited to this, and will be further explained later. They will not be elaborated here.

[0040] In summary, the embodiments of the present invention provide dimming openings in the corresponding pixel openings in the light adjustment layer, and the boundary of the orthogonal projection of the dimming opening on the substrate side near the substrate is composed of the outermost boundaries of at least two overlapping virtual openings. The geometric center of the virtual opening does not overlap with the geometric center of the dimming opening, which allows the boundary of the dimming opening to expand outward in at least one direction. This reduces the impact on light extraction efficiency when the actual position of the dimming opening shifts due to process fluctuations, ensuring that the display panel has high light extraction efficiency.

[0041] It can be understood that, since the boundary of the orthographic projection of the side of the light-adjusting opening 130 close to the substrate 11 on the substrate 11 is composed of the outermost boundaries of at least two partially-overlapped virtual openings 3, the opening size of the side of the light-adjusting opening 130 close to the substrate 11 can be determined after the setting parameters of the virtual openings 3 are determined. Hereinafter, the design manner of the virtual openings 3 is further described on the basis of the above-described embodiments.

[0042] Continuing to refer to Figure 6 The geometric center 1301 of the optional light-adjusting opening 130 is located between the geometric centers 31 of the virtual openings 3. In this way, the geometric centers 31 of the virtual openings 3 are distributed on different sides of the geometric center 1301 of the light-adjusting opening 130, the boundary of the light-adjusting opening 130 is expanded outward in different directions, and thus the offset of the geometric center 130 of the light-adjusting opening 130 in different directions can be met, further reducing the influence of process fluctuation on the light extraction efficiency. As shown in Figure 6 The geometric center 1301 of the light-adjusting opening 130 is located between the geometric center 31-1 of the virtual opening 3-1 and the geometric center 31-2 of the virtual opening 3-2, and thus no matter the geometric center 1301 of the light-adjusting opening 130 is offset in the x direction (or the opposite direction of the x direction shown in the figure), no great influence on the light extraction efficiency is caused, and a display panel with high light extraction efficiency is ensured.

[0043] Figure 9 is Figure 4 Another enlarged structure diagram of the P region in Figure 9 The boundary of the orthographic projection of the side of the optional light-adjusting opening 130 close to the substrate 11 on the substrate 11 is composed of the outermost boundaries of at least three virtual openings 3, and the geometric centers 31 (the numbers after “31-” in the figure only represent numbering, and are consistent with the numbering of the corresponding virtual openings) of at least some of the virtual openings 3 are not on the same straight line. In other words, among all the virtual openings 3 corresponding to one light-adjusting opening 130, the geometric center 31 of at least one virtual opening 3 can be not on the same straight line as the geometric centers 31 of the other virtual openings 3. In actual processes, the offset direction of the light-adjusting opening 130 can be more than one, and in this embodiment, by setting the geometric centers 31 of at least some of the virtual openings 3 not on the same straight line, the offset of the light-adjusting opening 130 in at least two intersecting directions can be met, further reducing the influence of the actual position offset of the light-adjusting opening 130 caused by process fluctuation on the light extraction efficiency.

[0044] For example, as shown in Figure 9 The boundary of the light-adjusting opening 130 is composed of the outermost boundaries of the virtual opening 3-1, the virtual opening 3-2, and the virtual opening 3-3, and the geometric center of any one of the three virtual openings is not on the same straight line as the geometric centers of the other two. Referring to Figure 9Due to process fluctuations, the geometric center 1301 of the dimming opening may be offset from the geometric center 1201 of the pixel opening in both the x and y directions. By adopting the technical solution of this embodiment, at least the offset of the geometric center 1301 of the dimming opening 130 in both the x and y directions (process fluctuations) can be satisfied. In other words, even if the geometric center 1301 of the dimming opening is offset from the geometric center 1201 of the pixel opening in both the x and y directions, the technical solution of this embodiment can still ensure that the orthographic projection of the side of the dimming opening 130 near the substrate 11 on the substrate 11 covers the orthographic projection of the side of the pixel opening 120 near the substrate 11 on the substrate 11, thereby further reducing the impact of process fluctuations on light extraction efficiency.

[0045] certainly, Figure 9 The setup shown is for illustrative purposes only and is not a limitation. For example, in other embodiments, the geometric center 31-1 of the virtual opening 3-1, the geometric center 31-2 of the virtual opening 3-2, and the geometric center 1301 of the dimming opening 130 can be set to be on the same straight line, while the geometric center 31-3 of the virtual opening 3-3 is not on the same straight line.

[0046] Figure 10 yes Figure 4 Another enlarged structural diagram of the P region, as shown below. Figure 10 As shown, the geometric center 31 of the virtual opening 3 and the geometric center 1301 of the dimming opening 130 form a first line, and the included angle θ between any two adjacent first lines is equal.

[0047] Specifically, the geometric centers 31 of the n (n≥2) virtual openings 3 constituting the dimming opening 130 and the geometric center 1301 of the dimming opening 130 can form n first lines, which bisect 360° with the geometric center 1301 of the dimming opening 130 as the center. For example... Figure 6 As shown, when the boundary of the dimming opening 130 is formed by the outermost boundaries of two virtual openings 3, the geometric center 31 of these two virtual openings 3 can be located on the same straight line as the geometric center 1301 of the dimming opening 130, that is, the angle between the two adjacent first lines is 180°; Figure 9 As shown, when the boundary of the dimming opening 130 is formed by the outermost boundaries of the three virtual openings 3, the angle between any two adjacent first lines can be selected as 120°; as Figure 10 As shown, when the boundary of the dimming opening 130 is formed by the outermost boundaries of the four virtual openings 3, the included angle between any two adjacent first connecting lines can be selected as 90°. This setting makes the distribution of the virtual openings 3 more symmetrical and uniform, thereby further reducing the impact of process fluctuations on light extraction efficiency when the actual position of the dimming opening 130 shifts.

[0048] As shown in Figure 7 , the distance d between the geometric center 31 of each virtual opening 3 and the geometric center 1301 of the light-adjusting opening 130 can be equal. The size of the opening of the light-adjusting opening 130 near the substrate 11 needs to consider the influence on the light extraction efficiency. In the embodiment, by setting the distance d between the geometric center 31 of each virtual opening 3 and the geometric center 1301 of the light-adjusting opening 130 to be equal, the design complexity is lower, and the opening shape of the light-adjusting opening 130 near the substrate 11 is more regular, which is beneficial to ensure the light extraction efficiency.

[0049] Continuing to refer to Figure 7 , the shape of the orthographic projection of the pixel opening 120 on the substrate 11 near the substrate 11 side can be circular, and the shape of the orthographic projection of the virtual opening 3 on the substrate 11 can be circular. The circular design process is relatively simple, and the outermost boundary of the plurality of circular virtual openings 3 constitutes the boundary of the light-adjusting opening 130, which is relatively smooth, which is beneficial to ensure the consistency of the final shape of the light-adjusting opening 130 and the design shape. Therefore, the shape of the orthographic projection of the virtual opening 3 on the substrate 11 can be circular. Correspondingly, the opening shape of the pixel opening 120 near the substrate 11 side can also be circular. In this way, the difference between the shape of the light-adjusting opening 130 near the substrate 11 side and the shape of the pixel opening 120 near the substrate 11 side can be reduced, and the design difficulty can be reduced.

[0050] The inventors have found that the distance between the boundary of the pixel opening 120 and the boundary of the light-adjusting opening 130 affects the light extraction efficiency. In the embodiment, the boundary of the light-adjusting opening 130 is composed of the outermost boundaries of a plurality of virtual openings 3. Referring to Figure 7 , in order to reduce the influence on the light extraction efficiency and reduce the influence of process fluctuation on the light extraction efficiency, the opening radius R of the virtual opening 3 and the opening radius r of the pixel opening 120 near the substrate 11 side can satisfy: , wherein n represents the number of virtual openings 3 corresponding to the light-adjusting opening 130.

[0051] Specifically, in order to improve the light extraction efficiency, the distance between the boundary of the light-adjusting opening 130 and the boundary of the pixel opening 120 should meet a certain distance range (the specific range can be set by the user). It can be understood that if the difference (R-r) between the opening radius R of the virtual opening 3 and the opening radius r of the pixel opening 120 is a fixed value, as the number of virtual openings 3 increases, the average distance between the boundary of the light-adjusting opening 130 and the boundary of the pixel opening 120 will gradually increase, which is not conducive to ensuring the light extraction efficiency. In the embodiment, the difference between R and r is inversely proportional to the number of virtual openings 3, and the range of the difference between R and r is adjusted according to the number of virtual openings 3, which is conducive to ensuring that the average distance between the light-adjusting opening 130 and the pixel opening 120 meets the requirement of light extraction efficiency and reduces the impact on the light extraction efficiency. The opening radius of the pixel opening 120 can be set according to the requirement of the luminous brightness, and then the opening radius R of the virtual opening can be determined according to the above range.

[0052] Further, the distance d between the geometric center 31 of the optional virtual opening 3 and the geometric center 1301 of the light-adjusting opening 130 meets 0

[0053] It should be noted that the "boundary of the light-adjusting opening 130" can be understood as the opening boundary of the light-adjusting opening 130 close to the substrate side, and the "boundary of the pixel opening 120" can be understood as the opening boundary of the pixel opening 120 close to the substrate side.

[0054] In summary, when the virtual opening 3 is circular, the geometric center 1301 of each light-adjusting opening 130 can be determined on the mask (ideally, the geometric center coincides with the geometric center 1201 of the pixel opening 120), and the position of the geometric center 31 of each virtual opening 3 and the radius of each virtual opening 3 can be determined with the geometric center 1301 of the light-adjusting opening 130 as the center. The opening with a shape such as Figure 10 as shown can be obtained on the mask, and then the light-adjusting opening 130 with a corresponding shape can be formed in the light adjusting layer 13, and even if the geometric center 1301 of the light-adjusting opening 130 and the geometric center 1201 of the pixel opening 120 are offset due to process fluctuation, it will not have a great impact on the light extraction efficiency, and the specific principle will not be repeated here.

[0055] It should be noted that Figures 6-10This example illustrates the concept of circular pixel aperture 120 and virtual aperture 3; however, this configuration is not mandatory. Figure 11 yes Figure 4 Another enlarged structural diagram of the P region, as shown below. Figure 11 As shown, in other embodiments, the orthographic projection of the optional pixel opening 120 near the substrate 11 onto the substrate 11 is a regular polygon, and the orthographic projection of the virtual opening 3 onto the substrate 11 is also a regular polygon. The pixel opening 120 and the virtual opening 3 have the same number of sides. For example, Figure 11 Taking the orthographic projection of the dimming opening 130 on the substrate 11 near the substrate 11 as being composed of the outermost boundaries of four virtual openings 3, and the top view shape of the pixel opening 120 and the virtual openings 3 being regular hexagons as an example, the specific setting method of the virtual openings 3 can be referred to the setting method of the circular virtual openings 3 mentioned above, and will not be elaborated further here.

[0056] It should also be noted that in other embodiments, the shape of the orthographic projection of the side of the pixel opening 120 near the substrate 11 onto the substrate 11 can be a regular polygon (circle), and the shape of the orthographic projection of the virtual opening 3 onto the substrate 11 can be a circle (regular polygon). This embodiment of the present invention does not limit this.

[0057] In summary, the above embodiments have provided a detailed description of the design method for the virtual opening 3. Based on any of the above embodiments, please refer to... Figure 5 The optional light adjustment layer 13 includes a first refractive layer 131 and a second refractive layer 132; the refractive index of the first refractive layer 131 is less than the refractive index of the second refractive layer 132; the dimming opening 130 penetrates the first refractive layer 131, and the second refractive layer 132 is located on the side of the first refractive layer 131 away from the substrate 11, and the second refractive layer 132 has a portion that fills the dimming opening 130.

[0058] With this configuration, since the refractive index of the second refractive layer 132 is greater than that of the first refractive layer 131, at least a portion of the large-angle light emitted by the light-emitting unit 14 will propagate from the optically denser medium (i.e., the second refractive layer 132) to the optically less dense medium (i.e., the first refractive layer 131) when it irradiates the interface between the first refractive layer 131 and the second refractive layer 132 corresponding to the dimming opening 130. Furthermore, due to satisfying the total internal reflection condition, total internal reflection occurs at the sidewall of the dimming opening 130, and the light exits the display panel at a smaller angle, thereby improving the light extraction efficiency. Moreover, by adopting the design scheme of the dimming opening 130 boundary in this embodiment of the invention, the impact of process fluctuations on light extraction efficiency can be further reduced, ensuring that the display panel has a high light extraction efficiency.

[0059] Exemplarily, the refractive index of the first refractive layer 131 can be in a range of 1.3-1.6, and the refractive index of the second refractive layer 132 can be in a range of 1.6-1.8. A person skilled in the art can realize different light adjusting effects of the light adjusting layer 13 on the light emitting unit 14 by selecting the first refractive layer 131 and the second refractive layer 132 with different refractive indexes.

[0060] Continuing to refer to Figure 5 Optionally, the opening area of the pixel opening 120 gradually increases in a direction of the substrate 11 pointing to the pixel defining layer 12, and the opening area of the light adjusting opening 130 gradually increases in the direction of the substrate 11 pointing to the pixel defining layer 12. By setting the opening area of the pixel opening 120 gradually increasing in the direction of the substrate 11 pointing to the pixel defining layer 12, the setting of the cathode 143 of the light emitting unit 14 is facilitated, and the risk of disconnection is reduced. By setting the opening area of the light adjusting opening 130 gradually increasing in the direction of the substrate 11 pointing to the pixel defining layer 12, and in combination with the difference in refractive index between the first refractive layer 131 and the second refractive layer 132, the adjustment of the light exit angle can be realized, the large-angle light can be adjusted to small-angle light, and the light emitting panel can be shot out, thereby improving the light extraction efficiency.

[0061] As shown in Figure 5 and Figure 6 Optionally, the orthographic projection of the side of the light adjusting opening 130 close to the substrate 11 on the substrate 11 covers the orthographic projection of the side of the pixel opening 120 close to the substrate 11 on the substrate 11. In this way, the light emitted by the light emitting unit 14 can pass through the light adjusting opening 130, thereby ensuring the effect of the light adjusting layer 13 on improving the light extraction efficiency, i.e., ensuring a high light extraction efficiency.

[0062] Figure 12 is another cross-sectional structure schematic diagram of a display panel taken along QQ' in Figure 4 As shown in Figure 12 The display panel 10 further includes a light emitting unit layer and an encapsulation layer 15. The light emitting unit layer includes the light emitting unit 14, and the light emitting unit 14 is located in the pixel opening 120. The encapsulation layer 15 is located on a side of the light emitting unit layer away from the substrate 11. The encapsulation layer 15 includes a first organic layer 151, and the first organic layer 151 is multiplexed as the light adjusting layer 13. In this embodiment, the encapsulation layer 15 can be a thin film encapsulation (TFE). The thin film encapsulation can include an inorganic layer and an organic layer. Optionally, the thin film encapsulation can be formed by alternately stacking the inorganic layer and the organic layer. Optionally, the thin film encapsulation can further include a plurality of organic layers and a plurality of inorganic layers, and the plurality of inorganic layers and the plurality of organic layers are alternately stacked. The first organic layer 151 can be any organic layer in the thin film encapsulation 15. By multiplexing the first organic layer 151 as the light adjusting layer 13, the number of films of the display panel can be avoided from being additionally increased, thereby facilitating the thin design of the display panel.

[0063] Based on the same inventive concept, the embodiment of the present application also provides a display device, Figure 13 is a structural schematic diagram of a display device provided by the embodiment of the present application. The display device 20 comprises the display panel 10 provided by any of the above embodiments, and thus has the same beneficial effects as the display panel. For the same parts, refer to the description of the display panel embodiments above, which will not be repeated here. The display device 20 provided by the embodiment of the present application can be a mobile phone as shown in the figure, or any electronic product with display function, including but not limited to the following categories: television, notebook computer, desktop display, tablet computer, digital camera, smart bracelet, smart glasses, vehicle-mounted display, medical equipment, industrial control equipment, touch interaction terminal, etc. The embodiment of the present application does not make special limitation here. Figure 13

[0064] The above specific embodiments do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.​

Claims

1. A display panel, characterized by, The display panel comprises: a substrate; a pixel definition layer located on one side of the substrate; the pixel definition layer comprises a pixel opening; a light adjusting layer located on a side of the pixel definition layer away from the substrate; the light adjusting layer comprises a light adjusting opening corresponding to the pixel opening; a boundary of a normal projection of the light adjusting opening on the substrate is composed of outermost boundaries of at least two partially overlapped virtual openings; geometric centers of the virtual openings and the light adjusting opening are not overlapped; a shape of a normal projection of the pixel opening on the substrate is circular; a shape of a normal projection of the virtual opening on the substrate is circular; an opening radius R of the virtual opening and an opening radius r of the pixel opening satisfy: wherein n represents a number of the virtual openings corresponding to the light adjusting opening.

2. The display panel of claim 1, wherein, Geometric centers of the light adjusting opening are located between geometric centers of the virtual openings.

3. The display panel of claim 1, wherein, A boundary of a normal projection of the light adjusting opening on the substrate is composed of outermost boundaries of at least three virtual openings; geometric centers of at least some of the virtual openings are not on the same straight line.

4. The display panel of claim 1, wherein, Geometric centers of the virtual openings and the light adjusting opening form first connecting lines; an included angle between any two adjacent first connecting lines is equal.

5. The display panel of claim 1, wherein, Distances between geometric centers of each virtual opening and the light adjusting opening are equal.

6. The display panel of claim 1, wherein, A distance d between geometric centers of the virtual openings and the light adjusting opening satisfies 0 7. The display panel of claim 1, wherein, The light adjusting layer comprises a first refractive layer and a second refractive layer; a refractive index of the first refractive layer is smaller than a refractive index of the second refractive layer; the light adjusting opening penetrates through the first refractive layer; the second refractive layer is located on a side of the first refractive layer away from the substrate; the second refractive layer has a portion filling the light adjusting opening.

8. The display panel of claim 1, wherein, In a direction of the substrate pointing to the pixel definition layer, an opening area of the pixel opening gradually increases; an opening area of the light adjusting opening gradually increases.

9. The display panel of claim 1, wherein, A normal projection of the light adjusting opening on the substrate covers a normal projection of the pixel opening on the substrate.

10. The display panel of claim 1, wherein, The display panel further comprises: a light emitting unit layer; the light emitting unit layer comprises a light emitting unit; the light emitting unit is located in the pixel opening; an encapsulation layer located on a side of the light emitting unit layer away from the substrate; the encapsulation layer comprises a first organic layer; the first organic layer is multiplexed as the light adjusting layer.

11. A display device, characterized by comprising: The display panel comprises any one of claims 1-10.

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