Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel comprises a substrate; a plurality of light emitting elements on the substrate; the reflection columns are located on the substrate and located on the same side as the light-emitting elements, each reflection column is arranged between every two adjacent light-emitting elements, each reflection column comprises a reflection bank part, each reflection bank part comprises a side face and a bottom face facing the substrate, and a bank part included angle formed between the side face and the bottom face of each reflection bank part is an acute angle; the reflection column comprises a first reflection column arranged between the first color light-emitting element and the second color light-emitting element, and the first reflection column comprises a first reflection bank part facing the first color light-emitting element and a second reflection bank part facing the second color light-emitting element; the distance between the first light-reflecting bank part and the first color light-emitting element is different from the distance between the second light-reflecting bank part and the second color light-emitting element. According to the display panel, the reflection columns are additionally arranged, the light-emitting efficiency and the light-emitting brightness of the light-emitting element can be improved, the display effect of the display panel is improved, and power consumption is reduced.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and particularly to a display panel and a display device. Background Art

[0002] With the continuous development of display technologies, micro LEDs (Micro Light Emitting Diodes) are gradually applied to the display field due to their advantages such as small size and high luminous efficiency. For example, the display panels of electronic products such as smart phones and tablet computers adopt micro LEDs.

[0003] However, when the micro light emitting diodes emit light, the light emitted from their sidewalls is likely to leak, interfering with adjacent light emitting elements and affecting the display effect of the display panel. Summary of the Invention

[0004] The present invention provides a display panel and a display device to improve the display effect of the display panel.

[0005] According to one aspect of the present invention, a display panel is provided, including:

[0006] A substrate;

[0007] A plurality of light emitting elements located on the substrate, the light emitting elements including a first color light emitting element and a second color light emitting element with different light emitting colors;

[0008] A plurality of reflection columns located on the substrate and on the same side as the light emitting elements, the reflection columns being arranged between two adjacent light emitting elements, the reflection columns including a light reflecting dike portion, the light reflecting dike portion including a side surface and a bottom surface facing the substrate, and the dike angle formed between the side surface and the bottom surface of the light reflecting dike portion being an acute angle;

[0009] The reflection column includes a first reflection column arranged between the first color light emitting element and the second color light emitting element, the first reflection column including a first light reflecting dike portion facing the first color light emitting element and a second light reflecting dike portion facing the second color light emitting element, and the distance between the first light reflecting dike portion and the first color light emitting element is different from the distance between the second light reflecting dike portion and the second color light emitting element.

[0010] According to another aspect of the present invention, a display device is provided, including: the display panel as described above.

[0011] In the present invention, a reflective column is additionally provided in the display panel. The reflective column and the light-emitting element are located on the same side of the substrate. The reflective column is disposed between two adjacent light-emitting elements. The dike angle β formed between the side surface and the bottom surface of the reflective column is an acute angle. Thus, some large-angle light rays emitted by the light-emitting element can be reflected by the reflective column and exit from the pixel region corresponding to the light-emitting element, improving the light extraction efficiency and the light-emitting brightness of the light-emitting element. The first reflective column disposed between the adjacent first-color light-emitting element and the second-color light-emitting element has a distance D between its first reflective dike and the adjacent first-color light-emitting element A which is different from the distance D between the second reflective dike and the adjacent second-color light-emitting element B . By reasonably designing the distance between the reflective column and the adjacent light-emitting element, the difference in the light extraction efficiency between the first-color light-emitting element and the second-color light-emitting element can be reduced. Furthermore, the difference in the light-emitting brightness between the first-color light-emitting element and the second-color light-emitting element can be reduced, improving the display effect of the display panel and reducing the power consumption of the display panel.

[0012] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 is a schematic diagram of a display panel provided by an embodiment of the present invention;

[0015] Figure 2 is Figure 1 a comparison diagram of the display panel in

[0016] Figure 3 is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0017] Figure 4 is a schematic diagram of a light-emitting element provided by an embodiment of the present invention;

[0018] Figure 5 is a schematic diagram of the reflective column and the light-emitting structure provided by an embodiment of the present invention;

[0019] Figure 6 is a schematic diagram of yet another display panel provided by an embodiment of the present invention;

[0020] Figure 7 It is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0021] Figure 8 It is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0022] Figure 9 It is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0023] Figure 10 It is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0024] Figure 11 It is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0025] Figure 12 It is a schematic diagram of a display device provided by an embodiment of the present invention;

[0026] Figure 13 It is a schematic diagram of another display device provided by an embodiment of the present invention. Detailed implementation manners

[0027] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily need to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0029] Figure 1 It is a schematic diagram of a display panel provided by an embodiment of the present invention, as Figure 1As shown in the figure, in this embodiment, the display panel includes: a substrate 110; a plurality of light-emitting elements 120 located on the substrate 110, and the light-emitting elements 120 include a first-color light-emitting element 121 and a second-color light-emitting element 122 with different light-emitting colors; a plurality of reflection posts 130 located on the substrate 110 and on the same side as the light-emitting elements 120, the reflection posts 130 are arranged between two adjacent light-emitting elements 120, the reflection posts 130 include a light-reflecting embankment portion 131, the light-reflecting embankment portion 131 includes a side surface 132 and a bottom surface 133 facing the substrate 110, and the embankment angle β formed between the side surface 132 and the bottom surface 133 of the light-reflecting embankment portion 131 is an acute angle; the reflection posts 130 include a first reflection post 134 arranged between the first-color light-emitting element 121 and the second-color light-emitting element 122, the first reflection post 134 includes a first light-reflecting embankment portion 135 facing the first-color light-emitting element 121 and a second light-reflecting embankment portion 136 facing the second-color light-emitting element 122, and the distance D A between the first light-reflecting embankment portion 135 and the first-color light-emitting element 121 is different from the distance D between the second light-reflecting embankment portion 136 and the second-color light-emitting element 122 B .

[0030] In this embodiment, the display panel includes a substrate 110 and a plurality of light-emitting elements 120 located on the substrate 110. It can be understood that the substrate 110 includes a multi-layer stack structure (not shown), and the multi-layer of the substrate 110 at least includes an array layer for driving the light-emitting elements 120 to emit light, and the array layer includes a plurality of driving circuits. The driving circuits are electrically connected to the light-emitting elements 120 and provide a display driving signal to the light-emitting elements 120 to drive the light-emitting elements 120 to emit light. The driving circuits also control the light-emitting brightness of the light-emitting elements 120 by adjusting the magnitude of the display driving signal, so as to realize the display function of the display panel.

[0031] The light-emitting elements 120 include a first-color light-emitting element 121 and a second-color light-emitting element 122 with different light-emitting colors. Exemplarily, the display panel includes red light-emitting elements, green light-emitting elements, and blue light-emitting elements with different light-emitting colors. The first-color light-emitting element 121 can be one of the red light-emitting element, the green light-emitting element, and the blue light-emitting element, and the second-color light-emitting element 122 has a different light-emitting color from the first-color light-emitting element 121, and the second-color light-emitting element 122 can be another one of the red light-emitting element, the green light-emitting element, and the blue light-emitting element. In this embodiment, the optional light-emitting elements 120 include micro light-emitting diodes (Micro LEDs); in other embodiments, the optional light-emitting elements include sub-millimeter light-emitting diodes (Mini LEDs), or the light-emitting elements are other types of light-emitting elements, and the type of the light-emitting elements is not specifically limited. The present invention does not specifically limit the film layer structure of the substrate and the color type and arrangement of the light-emitting elements, and is applicable to various display panels.

[0032] The display panel further includes a plurality of reflection columns 130. The reflection columns 130 can reflect light. The reflection columns 130 include a reflective material, or a reflective film is formed on the surface of the reflection columns 130, so as to realize the light reflection function of the reflection columns 130. The plurality of reflection columns 130 are located on one side of the substrate 110. Specifically, the reflection columns 130 and the light-emitting elements 120 are located on the same side of the substrate 110. Refer to Figure 1 As shown, the optional display panel further includes a packaging layer 140. The packaging layer 140 is filled between adjacent light-emitting elements 120. Optionally, the packaging layer 140 includes a transparent packaging material. Specifically, the optional reflection columns 130 are arranged on the side of the packaging layer 140 away from the substrate 110. However, the layout of the reflection columns 130 and the light-emitting elements 120 on the same side of the substrate 110 is not limited to Figure 1 As shown, different layout methods will be illustrated and described later.

[0033] The reflection columns 130 are arranged between two adjacent light-emitting elements 120. In the Z direction, the orthographic projection of the reflection columns 130 on the substrate 110 is located between two adjacent light-emitting elements 120. Specifically, the orthographic projection of the reflection columns 130 on the substrate 110 does not overlap or contact the orthographic projection of the light-emitting elements 120 on the substrate 110. In the X direction, there is a distance greater than 0 between the reflection columns 130 and the adjacent light-emitting elements 120. This distance can be understood as the minimum distance between the reflection columns 130 and the adjacent light-emitting elements 120 in the X direction. Refer to Figure 1 As shown, the display panel includes a first-color light-emitting element 121 and a second-color light-emitting element 122 adjacent in the X direction. The reflection column 130 arranged between the first-color light-emitting element 121 and the second-color light-emitting element 122 is defined as a first reflection column 134. In the Z direction, the orthographic projection of the first reflection column 134 on the substrate 110 is located between the first-color light-emitting element 121 and the second-color light-emitting element 122. In the X direction, the distance D A between the first reflection column 134 and the first-color light-emitting element 121 is greater than 0, and the distance D B between the first reflection column 134 and the second-color light-emitting element 122 is greater than 0.

[0034] The reflection columns 130 can reflect light. Figure 2 is Figure 1 a comparison diagram of the display panel in Figure 2 which no reflection columns are provided. Refer to Figure 2As shown, for the light emitted by the light-emitting element 120, some of the light (marked as La) can exit from the corresponding pixel region, and there are also some large-angle light rays (marked as Lx) that may be blocked by other internal structures of the display panel or exit from the pixel region corresponding to the adjacent light-emitting element 120. It can be understood that the larger the proportion of the light emitted by the light-emitting element 120 that exits from the corresponding pixel region, the higher the luminous brightness of the light-emitting element 120, the higher the light extraction efficiency of the light-emitting element 120, and correspondingly, the display effect of the display panel can be improved. Refer to Figure 1 As shown, a reflective pillar 130 is provided between two adjacent light-emitting elements 120. The reflective pillar 130 can reflect some of the large-angle light rays (marked as Lx) emitted by the light-emitting element 120, which is beneficial for the reflected light to exit from the pixel region corresponding to the light-emitting element 120, increasing the proportion of the light emitted by the light-emitting element 120 that exits from the corresponding pixel region, and thus improving the luminous brightness of the light-emitting element 120 and the display effect of the display panel.

[0035] In this embodiment, the reflective pillar 130 includes a light-reflecting embankment portion 131. The light-reflecting embankment portion 131 includes a side surface 132 and a bottom surface 133 facing the substrate 110. The embankment angle β formed between the side surface 132 and the bottom surface 133 of the light-reflecting embankment portion 131 is an acute angle, which can improve the luminous brightness of the light-emitting element 120 and the display effect of the display panel. Here, the embankment angle β is specifically the internal angle formed between the side surface 132 and the bottom surface 133 of the light-reflecting embankment portion 131. At least the side surface 132 of the reflective pillar 130 can reflect light.

[0036] Refer to Figure 1 As shown, when some of the large-angle light rays (marked as Lx) emitted by the light-emitting element 120 are incident on the side surface 132 of the reflective pillar 130, based on the fact that the embankment angle β formed between the side surface 132 and the bottom surface 133 of the light-reflecting embankment portion 131 is an acute angle, the incident angle of the light ray Lx on the side surface 132 of the light-reflecting embankment portion 131 is relatively large, that is, the angle between the light ray Lx and the normal line NL of the side surface 132 of the light-reflecting embankment portion 131 is relatively large. Correspondingly, the reflection angle of the reflected light ray Lb after the light ray Lx is reflected by the side surface 132 of the light-reflecting embankment portion 131 with respect to the normal line NL is relatively large, which is beneficial for the reflected light ray Lb to exit from the pixel region corresponding to the light-emitting element 120. In this way, the proportion of the light emitted by the light-emitting element 120 that exits from the corresponding pixel region can be increased, and thus the luminous brightness of the light-emitting element 120 and the display effect of the display panel can be improved.

[0037] On the contrary, if the embankment angle formed between the side surface and the bottom surface of the provided reflective pillar is an obtuse angle (or a right angle), the luminous brightness of the light-emitting element may not be improved. Specifically, refer to Figure 2As shown, if a reflecting post (marked as 130') is provided and the angle between the side and the bottom of the reflecting post 130' is an obtuse angle (or a right angle), when a part of the large-angle light (marked as Lx) emitted by the light-emitting element 120 is incident on the side of the reflecting post 130', the incident angle of the light Lx on the side of the reflecting post 130' is small, that is, the angle between the light Lx and the normal NL' of the side of the reflecting post 130' is small. Correspondingly, the reflection angle, that is, the angle between the reflected light Lb' after the light Lx is reflected by the side of the reflecting post 130' and the normal NL' is small, and it is easy for the reflected light Lb' to be incident on the light-emitting element 120, interfering with the normal light emission of most of the light La of the light-emitting element 120 and affecting the light-emitting brightness of the light-emitting element 120 and the display effect of the display panel.

[0038] In this embodiment, the reflecting post 130 provided between the first-color light-emitting element 121 and the second-color light-emitting element 122, that is, the first reflecting post 134, includes a first light-reflecting embankment portion 135 facing the first-color light-emitting element 121 and a second light-reflecting embankment portion 136 facing the second-color light-emitting element 122. The distance D between the first light-reflecting embankment portion 135 and the first-color light-emitting element 121 A is different from the distance D between the second light-reflecting embankment portion 136 and the second-color light-emitting element 122 B , which can balance the light-emitting brightness of the light-emitting elements 120 of different colors, reduce the difference in the light-emitting brightness of the light-emitting elements 120 of different colors, and thus improve the display effect of the display panel.

[0039] In a conventional display panel, there are differences in the light extraction efficiency of light-emitting elements of different colors. The light-emitting brightness of the light-emitting element with a lower light extraction efficiency is relatively low, and the light-emitting brightness of the light-emitting element with a higher light extraction efficiency is relatively high. In this embodiment, a reflecting post 130 is provided between two adjacent light-emitting elements 120. The reflecting post 130 can reflect the large-angle light emitted by the light-emitting element 120 to increase the light extraction efficiency and light-emitting brightness of the light-emitting element 120.

[0040] Specifically, if the distance between the light-reflecting embankment portion 131 of the reflecting post 130 and the adjacent light-emitting element 120 is relatively increased, then more of the large-angle light (marked as Lx) emitted by the light-emitting element 120 can be reflected by the reflecting post 130 to the pixel region corresponding to the light-emitting element 120 for emission, thereby improving the light extraction efficiency and light-emitting brightness of the light-emitting element 120. Similarly, if the distance between the light-reflecting embankment portion 131 of the reflecting post 130 and the adjacent light-emitting element 120 is relatively decreased, then less of the large-angle light (marked as Lx) emitted by the light-emitting element 120 will be reflected to the pixel region corresponding to the light-emitting element 120 for emission, and the increase in the light extraction efficiency of the light-emitting element 120 will be reduced, relatively reducing the light-emitting brightness of the light-emitting element 120.

[0041] In this embodiment, for the first-color light-emitting element 121 and the second-color light-emitting element 122 with different emission colors, in the conventional case without the reflection posts 130, the light extraction efficiency of the first-color light-emitting element 121 is different from that of the second-color light-emitting element 122. Assuming that the light extraction efficiency of the first-color light-emitting element 121 is less than that of the second-color light-emitting element 122 in the conventional case without the reflection posts 130, when the reflection posts 130 are added, the distance D between the first light-reflecting embankment portion 135 and the first-color light-emitting element 121 is designed A to be greater than the distance D between the second light-reflecting embankment portion 136 and the second-color light-emitting element 122 B . Then, the large-angle light emitted by the first-color light-emitting element 121 can be reflected more by the first light-reflecting embankment portion 135 and emitted from the corresponding pixel region, while the large-angle light emitted by the second-color light-emitting element 122 is reflected less by the second light-reflecting embankment portion 136 and emitted from the corresponding pixel region. Therefore, the light extraction efficiency increment of the first-color light-emitting element 121 based on the reflection posts 130 is greater than that of the second-color light-emitting element 122 based on the reflection posts 130. In this way, the difference in the light extraction efficiency between the first-color light-emitting element 121 and the second-color light-emitting element 122 is reduced, and the emission brightness of the first-color light-emitting element 121 and the second-color light-emitting element 122 is balanced. By adjusting the distance between the reflection posts 130 and the adjacent light-emitting elements 120, the difference in the emission brightness of the light-emitting elements 120 of different colors can be reduced, and the display effect of the display panel can be improved.

[0042] Refer to Figure 1 As shown, in the first reflection post 134, the embankment angle β of the first light-reflecting embankment portion 135 A is different from the embankment angle β of the second light-reflecting embankment portion 136 B . When the embankment angle β of the light-reflecting embankment portion 131 changes, the incident angle of some large-angle light (marked as Lx) emitted by the light-emitting element 120 on the side surface 132 of the reflection post 130 changes, so that the reflection angle of the light Lx changes, thereby affecting the magnitude of the light extraction efficiency increment of the light-emitting element 120 based on the reflection post 130. In this embodiment, by reasonably adjusting the embankment angle β of the first light-reflecting embankment portion 135 A and the embankment angle β of the second light-reflecting embankment portion 136 B, it is possible to control the light emission efficiency increment of the first color light-emitting element 121 based on the reflection column 130 and the light emission efficiency increment of the second color light-emitting element 122 based on the reflection column 130, thereby reducing the light emission efficiency difference and the light emission brightness difference between the first color light-emitting element 121 and the second color light-emitting element 122, and improving the display effect of the display panel. Exemplarily, it is optional that the embankment angle of the light reflecting embankment adjacent to the red light-emitting element is larger, and the embankment angle of the light reflecting embankment adjacent to the green or blue light-emitting element is smaller. However, in actual production, it can be reasonably adjusted according to the requirements of the product, and is not limited thereto.

[0043] Reference Figure 1 As shown, it is optional that the first reflection column 134 satisfies the following conditions: Dc / 10 ≤ D A ≤ Dc / 5, and / or, Dc / 10 ≤ D B ≤ Dc / 5; where Dc is the distance between the adjacent first color light-emitting element 121 and the second color light-emitting element 122, and D A is the distance between the first light reflecting embankment 135 and the first color light-emitting element 121, and D B is the distance between the second light reflecting embankment 136 and the second color light-emitting element 122.

[0044] As the resolution PPI of the display panel is getting higher and higher, correspondingly, the distance (such as Dc) between adjacent light-emitting elements 120 in the display panel is getting smaller and smaller. If the distance between the light reflecting embankment 131 and the adjacent light-emitting element 120 is designed to be too large, although it will increase the light emission efficiency increment of the light-emitting element 120 based on the reflection column 130, it may affect the resolution of the display panel. If the distance between the light reflecting embankment 131 and the adjacent light-emitting element 120 is designed to be too small, the resolution of the display panel is guaranteed, but it may affect the light emission efficiency increment of the light-emitting element 120 based on the reflection column 130.

[0045] In this embodiment, if the ratio of the distance between the light reflecting embankment 131 and the adjacent light-emitting element 120 to the distance between adjacent light-emitting elements is designed to be between 1 / 5 and 1 / 10, then on the basis of ensuring the resolution of the display panel, the light emission efficiency increment of the light-emitting element 120 based on the reflection column 130 can be improved as much as possible, thereby improving the display effect. It should be noted that those skilled in the art can reasonably design the ratio of the distance between the light reflecting embankment and the adjacent light-emitting element to the distance between adjacent light-emitting elements according to the requirements of the product, and is not limited to the ratio range described in this embodiment; Exemplarily, Dc / 12 ≤ D B ≤ Dc / 4.

[0046] In the present invention, a reflective column is additionally provided in the display panel. The reflective column and the light-emitting element are on the same side of the substrate. The reflective column is disposed between two adjacent light-emitting elements. The dike angle β formed between the side surface and the bottom surface of the reflective column is an acute angle. Thus, part of the large-angle light emitted by the light-emitting element can be reflected by the reflective column and exit from the pixel region corresponding to the light-emitting element, improving the light extraction efficiency and the light-emitting brightness of the light-emitting element. The first reflective column disposed between the adjacent first-color light-emitting element and the second-color light-emitting element has a different distance D between the first light-reflecting dike portion and the adjacent first-color light-emitting element A from the distance D between the second light-reflecting dike portion and the adjacent second-color light-emitting element B . By reasonably designing the distance between the reflective column and the adjacent light-emitting element, the difference in the light extraction efficiency between the first-color light-emitting element and the second-color light-emitting element can be reduced, thereby reducing the difference in the light-emitting brightness between the first-color light-emitting element and the second-color light-emitting element, improving the display effect of the display panel, and reducing the power consumption of the display panel.

[0047] Figure 3 FIG. is a schematic diagram of another display panel provided by an embodiment of the present invention Figure 4 FIG. is a schematic diagram of a light-emitting element provided by an embodiment of the present invention. Referring to Figure 3 and Figure 4 shown, the optional light-emitting element 120 includes a first electrode 123, a second electrode 124, and a light-emitting structure 125 electrically connecting the first electrode 123 and the second electrode 124. The light-emitting structure 125 includes a light-emitting dike portion 126. The light-emitting dike portion 126 includes a side surface 126a and a bottom surface 126b facing the substrate 110. The external angle α formed between the side surface 126a and the bottom surface 126b of the light-emitting dike portion 126 is an acute angle. In this embodiment, the optional light-emitting element 120 includes a micro light-emitting diode (Micro LED).

[0048] In this embodiment, the light-emitting element 120 includes a first electrode 123 and a second electrode 124 that are insulated from each other. The substrate 110 includes a driving circuit 111 for driving the light-emitting element 120 to emit light. The driving circuit 111 includes a first bonding electrode 112 and a second bonding electrode 113 that are insulated from each other. The first bonding electrode 112 of the driving circuit 111 is electrically connected to the first electrode 123 of the light-emitting element 120, and the second bonding electrode 113 of the driving circuit 111 is electrically connected to the second electrode 124 of the light-emitting element 120. The driving circuit 111 provides a display driving signal to the light-emitting element 120 through the first bonding electrode 112 and the second bonding electrode 113 to drive the light-emitting element 120 to emit light. It can be understood that the structure of the driving circuit 111 for driving the light-emitting element 120 to emit light further includes others. Exemplarily, the driving circuit 111 includes at least one thin-film transistor. Only the first bonding electrode 112 and the second bonding electrode 113 electrically connected to the light-emitting element 120 are shown here, and the structure of the driving circuit 111 will not be described in detail.

[0049] The light-emitting element 120 includes a light-emitting structure 125 electrically connected to the first electrode 123 and the second electrode 124 respectively. Specifically, the light-emitting structure 125 includes a first-type semiconductor layer 125a, an active layer 125b, and a second-type semiconductor layer 125c that are stacked. The active layer 125b is located between the first-type semiconductor layer 125a and the second-type semiconductor layer 125c. The first-type semiconductor layer 125a is electrically connected to the first electrode 123 through a first electrode transfer layer 125d, and the second-type semiconductor layer 125c is electrically connected to the second electrode 124 through a second electrode transfer layer 125e. The light-emitting structure 125 further includes a plurality of insulating layers 125f to insulate the first-type semiconductor layer 125a and the second electrode transfer layer 125e and to insulate the second-type semiconductor layer 125c and the first electrode transfer layer 125d. The first-type semiconductor layer 125a and the second-type semiconductor layer 125c are semiconductor layers with opposite polarities. For example, the first-type semiconductor layer 125a can be an N-type semiconductor and the second-type semiconductor layer 125c can be a P-type semiconductor, or the first-type semiconductor layer 125a can be a P-type semiconductor and the second-type semiconductor layer 125c can be an N-type semiconductor. Figure 4 The structural design of the shown light-emitting element 120 is only an example. The present invention is applicable to various different types and structural designs of light-emitting elements, not limited to Figure 4 the shown Micro LED.

[0050] The light-emitting structure 125 of the light-emitting element 120 includes a light-emitting dike portion 126. The light-emitting dike portion 126 includes a side surface 126a and a bottom surface 126b facing the substrate 110. The external included angle α formed between the side surface 126a and the bottom surface 126b of the light-emitting dike portion 126 is an acute angle. It can be understood that the technical solution of designing the reflection column 130 between adjacent light-emitting elements 120 is not limited to the light-emitting element 120 with an acute external included angle α. When required by the product, the reflection column can be designed between the light-emitting elements with a right angle or an obtuse angle for the external included angle α, without specific limitation.

[0051] Figure 5 It is a schematic diagram of the reflection column and the light-emitting structure provided by an embodiment of the present invention. Refer to Figure 1 、 Figure 3 and Figure 5 As shown, it is optional that β = β 0 -(α / 2); where β is the dike included angle formed between the side surface 132 and the bottom surface 133 of the reflective dike portion, α is the external included angle formed between the side surface 126a and the bottom surface 126b of the light-emitting dike portion, and 60° ≤ β 0 ≤ 120°. It is optional that β 0 = 90°. The dike included angle β is not fixed and can be flexibly adjusted with the change of α. β and α satisfy β = β 0 -(α / 2).

[0052] In this embodiment, the reflection column 130 includes a side surface 132 facing the light-emitting element 120 and a bottom surface 133 facing the substrate 110. The internal included angle between the side surface 132 and the bottom surface 133 in the reflection column 130 is β. Among them, the side surface 132 of the reflection column 130 is the reflection surface corresponding to the adjacent light-emitting element 120, and the reflection surface 132 has a corresponding normal line NL.

[0053] The external included angle formed between the side surface 126a and the bottom surface 126b of the light-emitting structure 125 is α. The angle between the light ray Lr emitted from the side surface 126a of the light-emitting structure 125 and the side surface 126a is 90°. The light ray Lr emitted from the side surface 126a of the light-emitting structure 125 is reflected by the reflection surface 132 to form a reflected light ray Lf. In an ideal state, it is optional that the angle between the reflected light ray Lf and the bottom surface 133 of the reflection column 130 is 90°. The bottom surface 133 of the reflection column 130 is parallel to the bottom surface 126b of the light-emitting structure 125.

[0054] Figure 5The intersection point of the medium normal line NL and the reflecting surface 132 is O. A virtual line segment O-X parallel to the bottom surface 133 is drawn. It can be obtained that the internal angle between the virtual line segment O-X and the reflecting surface 132 is equal to β, and the angle between the virtual line segment O-X and the reflected light Lf is equal to 90°. Then β + βy = 90°. The angle between the normal line NL and the reflecting surface 132 is equal to 90°. The incident angle of the light Lr on the reflecting surface 132 is equal to the reflection angle βx of the reflected light Lf on the reflecting surface 132. Then βx + βy = 90°. Then β + βy = 90° = βy + βx. It can be known that the incident angle βx of the light Lr is β.

[0055] Figure 5 The planar equivalent figure of the light-emitting structure 125 has a vertex Pa. A virtual line segment Q-Pa parallel to the normal line NL, a virtual line segment Q-Pb parallel to the reflected light Lf, and a virtual line segment Q-Pc parallel to the reflecting surface 132 are drawn. It can be obtained that the internal angle between the bottom surface 126b of the light-emitting structure 125 and the virtual line segment Q-Pc is equal to β, and the angle between the virtual line segment Q-Pa and the virtual line segment Q-Pc is equal to 90°. Then θa = 180° - 90° - β = 90° - β. The internal angle θb between the light Lr and the virtual line segment Q-Pa is equal to the incident angle β of the light Lr. The angle between the light Lr and the side surface 126a is equal to 90°. Then θc = 90° - θb = 90° - β.

[0056] Given that θa = 90° - β, θc = 90° - β, and α = θa + θc, then α = 90° - β + 90° - β = 180° - 2β. It is obtained that β = 90° - (α / 2).

[0057] It should be noted that the light Lr emitted from the side surface 126a of the light-emitting structure 125 forms a reflected light Lf after being reflected by the reflecting surface 132. In an ideal state, the angle between the reflected light Lf and the bottom surface 133 of the reflecting column 130 is equal to 90°, that is, the reflected light Lf vertically exits upward from the pixel region corresponding to the light-emitting element 120. In practice, when the angle between the reflected light Lf and the bottom surface 133 of the reflecting column 130 is slightly less than 90° or slightly greater than 90°, the reflected light Lf can also exit from the pixel region corresponding to the light-emitting element 120, thereby improving the light extraction efficiency of the light-emitting element 120. Therefore, it is designed that β = β 0 -(α / 2), 60° ≤ β 0 ≤ 120°. Optionally, β 0 = 90°.

[0058] The external angle α of the light-emitting embankment of the light-emitting element is different. Correspondingly, the embankment angle β of the reflecting column adjacent to the light-emitting element can be flexibly adjusted.

[0059] Reference Figure 1As shown, the optional first-color light-emitting element 121 is a red light-emitting element, and the second-color light-emitting element 122 is a green light-emitting element or a blue light-emitting element; in the first reflecting column 134, the distance D between the first light-reflecting embankment portion 135 and the first-color light-emitting element 121 A is greater than or equal to the distance D between the second light-reflecting embankment portion 136 and the second-color light-emitting element 122 B .

[0060] In this embodiment, the optional light-emitting element 120 includes at least two of a red light-emitting element, a green light-emitting element, and a blue light-emitting element. Optionally, the first-color light-emitting element 121 is a red light-emitting element, and the second-color light-emitting element 122 is a green light-emitting element or a blue light-emitting element. Under normal circumstances, the light-emitting efficiency of the red light-emitting element is lower than that of the green light-emitting element, and the light-emitting efficiency of the red light-emitting element is also lower than that of the blue light-emitting element. The light-emitting efficiencies of the green light-emitting element and the blue light-emitting element are close to each other.

[0061] When the first-color light-emitting element 121 is a red light-emitting element, it is optional to set the distance D between the first light-reflecting embankment portion 135 and the first-color light-emitting element 121 A to be greater than the distance D between the second light-reflecting embankment portion 136 and the second-color light-emitting element 122 B . Then, compared with the second-color light-emitting element 122, the large-angle light emitted by the first-color light-emitting element 121 can be reflected more by the first light-reflecting embankment portion 135 and emitted from the corresponding pixel region, which can increase the light-emitting efficiency increment of the first-color light-emitting element 121 based on the reflecting column 130. In this way, the difference in the light-emitting brightness of the light-emitting elements 120 of different colors can be reduced, and the display effect of the display panel can be improved.

[0062] Of course, when the product requires it, when the first-color light-emitting element 121 is a red light-emitting element, D A can also be equal to D B . In other embodiments, if the first-color light-emitting element is a green light-emitting element and the second-color light-emitting element is a blue light-emitting element, the distance between the first light-reflecting embankment portion and the adjacent first-color light-emitting element can be equal to the distance between the second light-reflecting embankment portion and the adjacent second-color light-emitting element.

[0063] Figure 6 is a schematic diagram of another display panel provided by an embodiment of the present invention, as Figure 6As shown, the optional light-emitting element 120 further includes a third-color light-emitting element 127; the reflection column 130 includes a second reflection column 137 disposed between the second-color light-emitting element 122 and the third-color light-emitting element 127, and the second reflection column 137 is different from the first reflection column 134. Optionally, the first-color light-emitting element 121 is a red light-emitting element; the second-color light-emitting element 122 is one of a green light-emitting element and a blue light-emitting element, and the third-color light-emitting element 127 is the other of the green light-emitting element and the blue light-emitting element.

[0064] In this embodiment, the light-emitting element 120 includes a first-color light-emitting element 121, a second-color light-emitting element 122, and a third-color light-emitting element 127 with different light-emitting colors. Optionally, the light-emitting element 120 includes a red light-emitting element, a green light-emitting element, and a blue light-emitting element, and the first-color light-emitting element 121, the second-color light-emitting element 122, and the third-color light-emitting element 127 are respectively a red light-emitting element, a green light-emitting element, and a blue light-emitting element. Exemplarily, the first-color light-emitting element 121 is a red light-emitting element, the second-color light-emitting element 122 is a green light-emitting element, and the third-color light-emitting element 127 is a blue light-emitting element, but it is not limited thereto. In other embodiments, the light-emitting element may further include two, four, or other light-emitting elements with different light-emitting colors; or, the color distribution of the first, second, and third-color light-emitting elements in the light-emitting element is not limited to the above examples.

[0065] The reflection column 130 disposed between the second-color light-emitting element 122 and the third-color light-emitting element 127 is defined as the second reflection column 137, and the second reflection column 137 is different from the first reflection column 134. The difference described herein may be that at least one parameter such as the embankment angle (such as β), the distance from the light-emitting element 120 (such as D), and the height (such as H) of the second reflection column 137 and the first reflection column 134 is different.

[0066] The light extraction efficiencies of the light-emitting elements 120 of different colors are different. In this embodiment, the first reflection column 134 is adjacent to the first-color light-emitting element 121, the second reflection column 137 is adjacent to the third-color light-emitting element 127, the light extraction efficiencies of the first-color light-emitting element 121 and the third-color light-emitting element 127 are different, and by designing the second reflection column 137 to be different from the first reflection column 134, the light extraction efficiencies of the light-emitting elements 120 of different colors can be adjusted, so that the difference in the light extraction efficiencies of the light-emitting elements 120 of different colors can be reduced, the light emission brightness of the light-emitting elements 120 of different colors can be balanced, and the display effect of the display panel can be improved.

[0067] Reference Figure 6As shown, optionally along the first direction Z, the distance Ha between the top surface of the first reflective column 134 and the first color light-emitting element 121 is different from the distance Hb between the top surface of the second reflective column 137 and the first color light-emitting element 121, the first direction Z is perpendicular to the plane where the top surface of the reflective column 130 is located, and the side surface of the reflective column 130 facing away from the substrate 110 is the top surface of the reflective column 130.

[0068] In this embodiment, the top surface of the reflective column 130 refers to the surface of the reflective column 130 on the side facing away from the substrate 110. Along the first direction Z, the spacing Ha specifically refers to the vertical height between the surface of the first color light emitting element 121 on the side facing away from the substrate 110 and the top surface of the first reflective column 134, and the spacing Hb specifically refers to the vertical height between the surface of the first color light emitting element 121 on the side facing away from the substrate 110 and the top surface of the second reflective column 137. Ha is different from Hb. Figure 6 Taking the first reflective column 134 and the second reflective column 137 as examples, it can be seen that the height of the first reflective column 134 is different from the height of the second reflective column 137.

[0069] It can be understood that the higher the height of the reflective column 130, the larger the area of ​​the side surface (i.e., the reflective surface) of the reflective column 130, which can reflect more light from the light-emitting element 120, thereby improving the light extraction efficiency of the light-emitting element 120. Based on this, in this embodiment, by flexibly designing the heights of the plurality of reflective columns 130, the light extraction efficiency of the light-emitting elements 120 of different colors can be adjusted, thereby reducing the difference in light extraction efficiency of the light-emitting elements 120 of different colors, balancing the light emission brightness of the light-emitting elements 120 of different colors, and improving the display effect of the display panel. For any film layer, the upper side is the top surface and the lower side is the bottom surface in the figure.

[0070] Optionally, along the first direction Z, a distance Ha between the top surface of the first reflective column 134 and the first color light emitting element 121 is greater than a distance Hb between the top surface of the second reflective column 137 and the first color light emitting element 121 .

[0071] In this embodiment, the first color light emitting element 121 is a red light emitting element, and the second color light emitting element 122 and the third color light emitting element 127 are green light emitting elements and blue light emitting elements, respectively. The light extraction efficiency of the red light emitting element is lower than that of the green or blue light emitting element, so Ha is designed to be greater than Hb, so that the reflection surface area of ​​the first reflection column 134 facing the first color light emitting element 121 can be increased, so that the first reflection column 134 can reflect more light of the first color light emitting element 121, improve the light extraction efficiency of the first color light emitting element 121, reduce the difference in light extraction efficiency of light emitting elements 120 of different colors, balance the light emission brightness of light emitting elements 120 of different colors, and improve the display effect of the display panel.

[0072] refer toFigure 6 As shown, the distance D between the optional second reflecting post 137 and the adjacent second-color light-emitting element 122 E is equal to the distance D between the second reflecting post 137 and the adjacent third-color light-emitting element 127 F .

[0073] In this embodiment, the second-color light-emitting element 122 and the third-color light-emitting element 127 are a green light-emitting element and a blue light-emitting element respectively, and the light extraction efficiencies of the two are close. Then, by designing D E to be equal to D F , the light extraction efficiencies and the emission brightness of the second-color light-emitting element 122 and the third-color light-emitting element 127 can be balanced, and the problem of too large difference in the emission brightness of the light-emitting elements 120 of different colors can be avoided, thereby improving the display effect of the display panel.

[0074] Figure 7 is a schematic diagram of another display panel provided by an embodiment of the present invention. As Figure 7 shown, the optional display panel further includes: at least one spacer 130a, the spacer 130a is disposed between the reflecting post 130 and the substrate 110, and the spacer 130a is in contact with the bottom surface of the reflecting post 130. Optionally, the material of the spacer 130a is different from that of the reflecting post 130; of course, in other embodiments, it is also optional that the material of the spacer is the same as that of the reflecting post. Referring Figure 7 to the figure shown, optionally, the spacer 130a and the reflecting post 130 are both disposed on the side of the encapsulation layer 140 away from the substrate 110, and the spacer 130a is disposed between the encapsulation layer 140 and the reflecting post 130.

[0075] In this embodiment, a first reflecting post 134 is disposed between the first-color light-emitting element 121 and the second-color light-emitting element 122, and a spacer 130a is disposed between the first reflecting post 134 and the substrate 110. Assuming Figure 6 and Figure 7 the height of the first reflecting post 134 in both is Ha, then in the Z direction, Figure 7 by adding a spacer 130a on the bottom surface side of the first reflecting post 134 in, the vertical height Ha1 between the surface of the first-color light-emitting element 121 away from the substrate 110 and the top surface of the first reflecting post 134 can be made greater than Ha. Based on this, by raising the reflecting post 130, the reflecting post 130 can reflect more light of the adjacent light-emitting elements 120 to the corresponding pixel regions, improving the light extraction efficiency and the emission brightness of the light-emitting elements 120. On this basis, the width of the first reflecting post 134 in the X direction can be reduced, or the width of the first reflecting post 134 in the X direction can be reduced by increasing the embankment angle of the first reflecting post 134. In this way, while ensuring the light extraction efficiency, the occupied area of the reflecting post 130 can also be reduced, which is beneficial to improving the resolution of the display panel.

[0076] Similarly, a second reflective column 137 is disposed between the third color light emitting element 127 and the second color light emitting element 122, and a support pad 130a is disposed on the bottom surface of the second reflective column 137. Figure 6 and Figure 7 The height of the second reflective columns 137 is Hb, and Hb1 is greater than Hb, which can improve the light extraction efficiency and light brightness of the light emitting element 120 and is also beneficial to improving the resolution of the display panel.

[0077] refer to Figure 6 As shown, the display panel further includes: an encapsulation layer 140, which is filled between adjacent light-emitting elements 120. The optional light-emitting element 120 includes a first electrode 123, a second electrode 124, and a light-emitting structure 125 electrically connecting the first electrode 123 and the second electrode 124; along the first direction Z, the height of the reflective column 130 is less than or equal to the height Hc of the light-emitting structure 125, and the first direction Z is perpendicular to the plane where the bottom surface of the reflective column 130 is located. In this embodiment, the optional encapsulation layer 140 is a transparent encapsulation layer, and the reflective column 130 is located on the side of the encapsulation layer 140 away from the substrate 110. For a display panel in which the reflective column 130 is located on the side of the encapsulation layer 140 away from the substrate 110, it is necessary to first form the encapsulation layer 140 and then make the reflective column 130.

[0078] Combination Figure 4 and Figure 6 As shown, along the first direction Z, the vertical height Hc of the light emitting structure 125 is designed to be greater than or equal to the vertical height Ha of the first reflective column 134 , and / or the vertical height Hc of the light emitting structure 125 is designed to be greater than or equal to the vertical height Hb of the second reflective column 137 .

[0079] If the height of the reflective column 130 is designed to be too high, in order to ensure the resolution of the display panel, the bank angle of the reflective column 130 may be increased, and the corresponding reflected light reflected by the reflective column 130 and normally emitted from the corresponding pixel area is reduced, which is not conducive to improving the luminous brightness of the light-emitting element 120. Alternatively, if the height of the reflective column 130 is designed to be too high, in order to improve the luminous brightness of the light-emitting element 120, it is necessary to ensure that the bank angle of the reflective column 130 is small, which will cause the reflective surface of the reflective column 130 to be too long, and the display panel cannot meet the high PPI display. Based on this, the height of the reflective column 130 is reasonably designed to improve the luminous brightness of the light-emitting element 120 while meeting the high resolution of the display panel.

[0080] In addition, if the height of the reflection column 130 is too high, the reflection column 130 is likely to tilt and fall onto the pixel area corresponding to the light-emitting element 120, causing dead pixels in the light-emitting element 120 and affecting the display effect of the display panel. Therefore, optionally, in the first direction Z, the height of the reflection column 130 is less than or equal to the height Hc of the light-emitting structure 125. On the basis of ensuring the display effect of the display panel, the manufacturing yield and reliability of the display panel can be improved.

[0081] Refer to Figure 7 As shown, the display panel further includes: at least one spacer 130a disposed between the reflection column 130 and the substrate 110, and the spacer 130a is in contact with the bottom surface of the reflection column 130; in the first direction Z, the sum of the heights of the reflection column 130 and the spacer 130a is less than or equal to the height Hc of the light-emitting structure 125. Figure 7 Differing from Figure 6 is that Figure 7 a spacer 130a is provided on the bottom surface of the reflection column 130 in

[0082] Combining Figure 4 and Figure 7 As shown, in the first direction Z, it is designed that the vertical height Hc of the light-emitting structure 125 is greater than or equal to the sum of the heights Ha1 of the first reflection column 134 and the spacer 130a, and / or, it is designed that the vertical height Hc of the light-emitting structure 125 is greater than or equal to the sum of the heights Hb1 of the second reflection column 137 and the spacer 130a. Similarly, by reasonably designing the sum of the heights of the reflection column 130 and the spacer 130a, on the basis of meeting the high resolution of the display panel, the luminous brightness of the light-emitting element 120 can be increased, the display effect and manufacturing yield of the display panel can be ensured, and the reliability of the display panel can be improved.

[0083] Figure 8 is a schematic diagram of another display panel provided by an embodiment of the present invention. As Figure 8 shown, optionally, the display panel further includes: a packaging layer 140 filled between adjacent light-emitting elements 120. Optionally, the packaging layer 140 is also filled on both sides of the reflection column 130.

[0084] In this embodiment, optionally, the packaging layer 140 is a transparent packaging layer. The reflection column 130 and the light-emitting element 120 are located on the same side of the substrate 110. The packaging layer 140 is filled between adjacent light-emitting elements 120, and the packaging layer 140 is also filled on both sides of the reflection column 130. For the case where the packaging layer 140 is filled on both sides of the reflection column 130, the reflection column 130 needs to be fabricated first, and then the packaging layer 140 is formed.

[0085] Refer to Figure 8As shown, the optional light-emitting element 120 includes a first electrode 123, a second electrode 124, and a light-emitting structure 125 electrically connecting the first electrode 123 and the second electrode 124; along the first direction Z, the height of the reflection column 130 is greater than or equal to the height Hc of the light-emitting structure 125, and the first direction Z is perpendicular to the plane where the bottom surface of the reflection column 130 is located.

[0086] Combined with Figure 4 and Figure 8 As shown, along the first direction Z, it is designed that the vertical height Hc of the light-emitting structure 125 is less than or equal to the vertical height Ha2 of the first reflection column 134, and / or, it is designed that the vertical height Hc of the light-emitting structure 125 is less than or equal to the vertical height Hb2 of the second reflection column 137. Specifically, the plane where the top surface of the optional reflection column 130 is located is higher than the plane where the encapsulation layer 140 is located. By reasonably designing the height of the reflection column 130, on the basis of meeting the high resolution of the display panel, the luminous brightness of the light-emitting element 120 can be improved, the display effect and manufacturing yield of the display panel can be ensured, and the reliability of the display panel can be improved.

[0087] Figure 9 is a schematic diagram of another display panel provided by an embodiment of the present invention. Different from Figure 8 in that Figure 9 the optional display panel further includes: at least one spacer 130a, the spacer 130a is disposed between the reflection column 130 and the substrate 110, and the spacer 130a is in contact with the bottom surface of the reflection column 130; along the first direction Z, the sum of the heights of the reflection column 130 and the spacer 130a is greater than or equal to the height Hc of the light-emitting structure 125.

[0088] In this embodiment, a spacer 130a is disposed between the reflection column 130 and the substrate 110. Along the first direction Z, it is designed that the sum of the vertical heights Ha3 of the first reflection column 134 and the spacer 130a is greater than or equal to the vertical height Hc of the light-emitting structure 125, and the sum of the vertical heights Hb3 of the second reflection column 137 and the spacer 130a is greater than or equal to the vertical height Hc of the light-emitting structure 125. By reasonably designing the sum of the heights of the reflection column 130 and the spacer 130a, on the basis of meeting the high resolution of the display panel, the luminous brightness of the light-emitting element 120 can be improved, the display effect and manufacturing yield of the display panel can be ensured, and the reliability of the display panel can be improved.

[0089] Figure 10 is a schematic diagram of another display panel provided by an embodiment of the present invention. Figure 11 is a schematic diagram of another display panel provided by an embodiment of the present invention. As shown in Figure 10 and Figure 11As shown, the optional display panel further includes: an encapsulation layer 140, located on the side of the light-emitting element 120 and the reflective post 130 facing away from the substrate 110. The optional light-emitting element 120 includes a first electrode 123, a second electrode 124, and a light-emitting structure 125 electrically connecting the first electrode 123 and the second electrode 124; along the first direction Z, the height of the reflective post 130 is less than or equal to the height Hc of the light-emitting structure 125, and the first direction Z is perpendicular to the plane where the bottom surface of the reflective post 130 is located.

[0090] In this embodiment, the optional encapsulation layer 140 is a transparent encapsulation layer, and the encapsulation layer 140 is located on the side of the reflective post 130 facing away from the substrate 110. For the display panel where the encapsulation layer 140 is located on the side of the reflective post 130 facing away from the substrate 110, the reflective post 130 needs to be fabricated first; if the light-emitting element 120 is a micro light-emitting diode, then the light-emitting element 120 is transferred, and then the encapsulation layer 140 is formed. The difference between the height Hc of the optional light-emitting structure 125 and the height of the reflective post 130 is greater than or equal to 1 micron, which is beneficial to the transfer of the light-emitting element 120 and improves the transfer yield.

[0091] Specifically, the plane where the top surface of the optional reflective post 130 is located is lower than the plane where the top surface of the encapsulation layer 140 is located; in other embodiments, the plane where the top surface of the reflective post is located is flush with the plane where the top surface of the encapsulation layer is located.

[0092] As Figure 10 shown, the plane where the top surface of the optional light-emitting element 120 is located is flush with the plane where the top surface of the encapsulation layer 140, or, as Figure 11 shown, the plane where the top surface of the optional light-emitting element 120 is located is lower than the plane where the top surface of the encapsulation layer 140.

[0093] Combined with Figure 4 、 Figure 10 and Figure 11 shown, along the first direction Z, it is designed that the vertical height Hc of the light-emitting structure 125 is greater than or equal to the vertical height Ha4 of the first reflective post 134, and / or, it is designed that the vertical height Hc of the light-emitting structure 125 is greater than or equal to the vertical height Hb4 of the second reflective post 137. By reasonably designing the height of the reflective post 130, on the basis of meeting the high resolution of the display panel, the light-emitting brightness of the light-emitting element 120 can be improved, the display effect and manufacturing yield of the display panel can be ensured, and the reliability of the display panel can be improved. In other embodiments, it is also optional to provide a spacer between the reflective post and the substrate.

[0094] For the display panel described in any of the above embodiments, the parameters of at least two reflective posts may be exactly the same, or the parameters of at least two reflective posts may be different. For two reflective posts with different parameters, at least one of the following conditions is satisfied: 1) The heights of the two reflective posts in the Z direction are different; 2) The widths of the two reflective posts in the X direction are different; 3) The bank angles of the two reflective posts are different; 4) At least two bank angles of the same reflective post are different; 5) At least two bank angles of the same reflective post are different from the spacing between adjacent light-emitting elements; and so on. Relevant practitioners can reasonably design the parameters of each reflective post according to the requirements of the product. In addition, for one reflective post, the spacing between a reflective bank of the reflective post and an adjacent light-emitting element can be a fixed value or a non-fixed value; or, the bank angle of a reflective bank of the reflective post can be a fixed value or a non-fixed value; or, the surface of the reflective post facing away from the substrate can be a plane, and the cross-section of the reflective post along the X-Z plane is a trapezoid (refer to Figure 1 ); or, the two reflective surfaces of the reflective post facing away from each other can be in contact, and the cross-section of the reflective post along the X-Z plane is a triangle.

[0095] Based on the same inventive concept, an embodiment of the present invention provides a display device, including the display panel described in any of the above embodiments. Figure 12 FIG. is a schematic diagram of a display device provided by an embodiment of the present invention, as Figure 12 shown. The display device 1 includes a display panel 100. The display device 1 has the beneficial effects of the display panel 100 in the above embodiments. The same parts can be understood with reference to the explanation of the display panel 100 above, and will not be repeated below. In the present invention, by adding reflective posts, the luminous brightness of the light-emitting elements can be improved, thereby enhancing the display brightness and display effect of the display panel and reducing the power consumption of the display panel.

[0096] The display device 1 provided in this embodiment can be Figure 12 the mobile phone shown in the figure, or any electronic product with a display function, including but not limited to the following categories: television sets, laptop computers, desktop monitors, tablet computers, digital cameras, smart bracelets, smart glasses, vehicle-mounted displays, industrial control devices, medical display screens, touch interaction terminals, etc. The embodiments of the present invention do not make special limitations on this.

[0097] As Figure 12As shown in the figure, the optional display panel 100 includes a first-color light-emitting element 121, a second-color light-emitting element 122, and a third-color light-emitting element 127. A plurality of light-emitting elements 120 in the display panel 100 are arranged in an array. The first-color light-emitting element 121, the second-color light-emitting element 122, and the third-color light-emitting element 127 arranged in sequence along the X direction constitute a row of light-emitting elements, and multiple rows of light-emitting elements are arranged in sequence along the Y direction. A reflection column 130 is provided between adjacent light-emitting elements 120. Taking Figure 12 the first reflection column 134 shown in the figure as an example, since it is adjacent to two light-emitting elements 120, the first reflection column 134 includes two light-reflecting embankment parts, namely the light-reflecting embankment part facing the first-color light-emitting element 121 and the light-reflecting embankment part facing the second-color light-emitting element 122. The embankment angles of the two light-reflecting embankment parts of one reflection column 130 may be the same or different.

[0098] Figure 13 FIG. is a schematic diagram of another display device provided by an embodiment of the present invention. As Figure 13 shown, the display device 2 includes a display panel 200. The display device 2 has the beneficial effects of the display panel 200 in the above-mentioned embodiment. For the same parts, reference may be made to the explanation of the display panel 200 above, and details will not be described hereinafter. As Figure 13 shown, the light-emitting elements 120 of the optional display panel 200 include a red light-emitting element R, a green light-emitting element G, and a blue light-emitting element B. Among them, the red light-emitting element R and the blue light-emitting element B arranged in sequence along the X direction constitute a first type of light-emitting element row, and the green light-emitting element G arranged in sequence along the X direction constitutes a second type of light-emitting element row. The first type of light-emitting element row and the second type of light-emitting element row are alternately arranged along the Y direction. A reflection column 130 is provided between adjacent light-emitting elements 120. Taking Figure 13 one reflection column 130 shown in the figure as an example, since it is adjacent to four light-emitting elements 120, the reflection column 130 includes four light-reflecting embankment parts, namely the light-reflecting embankment part facing the red light-emitting element R, the light-reflecting embankment part facing the blue light-emitting element B, and two light-reflecting embankment parts respectively facing the two green light-emitting elements G. The embankment angles of the four light-reflecting embankment parts of one reflection column 130 may be the same or different.

[0099] It should be noted that the arrangement manner of the light-emitting elements in the display panel is not limited to Figure 12 and Figure 13 shown in the figure. The above are only partial examples of the present invention. In addition, without affecting the normal display of the display panel, the total number, density, distribution position, etc. of the reflection columns in the display panel can be reasonably and flexibly adjusted, and no specific limitations are imposed.

[0100] The display device provided by an embodiment of the present invention may include the display panel provided by any embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the display panel.

[0101] It should be understood that various forms of the processes shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this is not limited herein.

[0102] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. 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 modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A display panel, characterized in that: include: substrate; A plurality of light-emitting elements located on the substrate, the light-emitting elements including a first color light-emitting element and a second color light-emitting element emitting light of different colors; A plurality of reflective columns located on the substrate and on the same side as the light-emitting elements, wherein the reflective columns are arranged between two adjacent light-emitting elements, the reflective columns include a reflective dam, the reflective dam includes a side surface and a bottom surface facing the substrate, and an angle formed between the side surface and the bottom surface of the reflective dam is an acute angle; The reflective column includes a first reflective column arranged between the first color light-emitting element and the second color light-emitting element, the first reflective column includes a first reflective dam facing the first color light-emitting element and a second reflective dam facing the second color light-emitting element, and the spacing between the first reflective dam and the first color light-emitting element is different from the spacing between the second reflective dam and the second color light-emitting element.

2. The display panel according to claim 1, characterized in that: In the first reflective column, an included angle of the first reflective embankment is different from an included angle of the second reflective embankment.

3. The display panel according to claim 1, characterized in that: The light emitting element includes a first electrode, a second electrode, and a light emitting structure electrically connecting the first electrode and the second electrode; The light emitting structure comprises a light emitting dam, wherein the light emitting dam comprises a side surface and a bottom surface facing the substrate, and an external angle formed between the side surface and the bottom surface of the light emitting dam is an acute angle.

4. The display panel according to claim 3, characterized in that: β＝β0-(α / 2)； Wherein, β is the dike angle formed between the side surface and the bottom surface of the reflective dike, α is the outer angle formed between the side surface and the bottom surface of the luminous dike, and 60°≤β0≤120°.

5. The display panel according to claim 4, characterized in that: β0＝90°。 6. The display panel according to claim 1, characterized in that: The first reflective column meets the following conditions: Dc / 10≤D A ≤Dc / 5, and / or, Dc / 10≤D B ≤Dc / 5; Wherein, Dc is the distance between adjacent first color light emitting elements and second color light emitting elements, D A is the distance between the first reflective embankment and the first color light emitting element, D B is the distance between the second reflective dam and the second color light emitting element.

7. The display panel according to claim 1, characterized in that: The first color light emitting element is a red light emitting element, and the second color light emitting element is a green light emitting element or a blue light emitting element; In the first reflective column, the distance between the first reflective dam and the first color light emitting element is greater than or equal to the distance between the second reflective dam and the second color light emitting element.

8. The display panel according to claim 1, characterized in that: The light emitting element further includes a third color light emitting element; The reflective column includes a second reflective column disposed between the second-color light-emitting element and the third-color light-emitting element, and the second reflective column is different from the first reflective column.

9. The display panel according to claim 8, characterized in that: The first color light emitting element is a red light emitting element; The second color light emitting element is one of a green light emitting element and a blue light emitting element, and the third color light emitting element is the other of the green light emitting element and the blue light emitting element.

10. The display panel according to claim 8, characterized in that: Along the first direction, the distance between the top surface of the first reflective column and the first color light-emitting element is different from the distance between the top surface of the second reflective column and the first color light-emitting element, the first direction is perpendicular to the plane where the top surface of the reflective column is located, and the surface of the side of the reflective column facing away from the substrate is the top surface of the reflective column.

11. The display panel according to claim 10, characterized in that: Along the first direction, the distance between the top surface of the first reflective column and the first color light emitting element is greater than the distance between the top surface of the second reflective column and the first color light emitting element.

12. The display panel according to claim 8, characterized in that: The spacing between the second reflective column and the adjacent second-color light-emitting element is equal to the spacing between the second reflective column and the adjacent third-color light-emitting element.

13. The display panel according to claim 1, characterized in that: Also includes: At least one support pad is disposed between the reflective column and the substrate, and the support pad is disposed in contact with a bottom surface of the reflective column.

14. The display panel according to claim 13, characterized in that: The support pad and the reflective column are made of different materials.

15. The display panel according to claim 1, characterized in that: Also includes: The encapsulation layer is filled between adjacent light-emitting elements.

16. The display panel according to claim 15, characterized in that: The reflective column is located on a side of the packaging layer facing away from the substrate.

17. The display panel according to claim 16, characterized in that: The light emitting element includes a first electrode, a second electrode, and a light emitting structure electrically connecting the first electrode and the second electrode; Along a first direction, the height of the reflective column is less than or equal to the height of the light-emitting structure, and the first direction is perpendicular to the plane where the bottom surface of the reflective column is located.

18. The display panel according to claim 17, characterized in that: Also includes: At least one support pad, the support pad is arranged between the reflective column and the substrate, and the support pad is arranged in contact with the bottom surface of the reflective column; Along the first direction, the sum of the heights of the reflective column and the support pad is less than or equal to the height of the light emitting structure.

19. The display panel according to claim 15, characterized in that: The packaging layer is also filled on both sides of the reflective column.

20. The display panel according to claim 19, characterized in that: The light emitting element includes a first electrode, a second electrode, and a light emitting structure electrically connecting the first electrode and the second electrode; Along a first direction, the height of the reflective column is greater than or equal to the height of the light-emitting structure, and the first direction is perpendicular to the plane where the bottom surface of the reflective column is located.

21. The display panel according to claim 20, characterized in that: Also includes: At least one support pad, the support pad is arranged between the reflective column and the substrate, and the support pad is arranged in contact with the bottom surface of the reflective column; Along the first direction, the sum of the heights of the reflective column and the support pad is greater than or equal to the height of the light emitting structure.

22. The display panel according to claim 1, characterized in that: Also includes: The packaging layer is located on a side of the light emitting element and the reflective column away from the substrate.

23. The display panel according to claim 22, characterized in that: The light emitting element includes a first electrode, a second electrode, and a light emitting structure electrically connecting the first electrode and the second electrode; Along a first direction, the height of the reflective column is less than or equal to the height of the light-emitting structure, and the first direction is perpendicular to the plane where the bottom surface of the reflective column is located.

24. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-23.

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