Display panel and display device

Abstract

This application provides a display panel and display device, relating to the field of display technology, with the aim of solving the problem of severe viewing angle distortion that easily occurs with vertically stacked Micro LEDs in related technologies. The display panel includes: a substrate and a first light-emitting device, a second light-emitting device, and a third light-emitting device sequentially disposed on the substrate along a first direction. The first, second, and third light-emitting devices emit different colors. At least one of the first and second light-emitting devices includes a plurality of spaced-apart light-emitting units, the arrangement direction of which is perpendicular to the first direction. The light-emitting units are Nano LEDs, and the third light-emitting device is a Micro LED.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a display panel and display device. Background Technology

[0002] Micro LEDs are characterized by their small size and high brightness, and therefore have been widely used in the field of display technology. For example, by vertically stacking Micro LEDs of different colors, full-color displays can be achieved.

[0003] However, because Micro LEDs of different emission colors are stacked vertically, the emission centers of the Micro LEDs are inconsistent in the vertical direction. When a user observes from an angle, the color mixing ratio of Micro LEDs of different emission colors changes at different viewing angles, resulting in a severe problem of color bias. Summary of the Invention

[0004] This application provides a display panel and display device to solve the problem of severe viewing angle distortion that easily occurs in vertically stacked Micro LEDs in related technologies.

[0005] On one hand, embodiments of this application provide a display panel, including: a substrate and a first light-emitting device, a second light-emitting device, and a third light-emitting device sequentially disposed on the substrate along a first direction, wherein the first light-emitting device, the second light-emitting device, and the third light-emitting device emit different colors; at least one of the first light-emitting device and the second light-emitting device includes a plurality of spaced light-emitting units, the arrangement direction of the plurality of light-emitting units is perpendicular to the first direction, the light-emitting units are Nano LEDs, and the third light-emitting device is a Micro LED.

[0006] In some embodiments, the first light-emitting device includes a plurality of spaced-apart first light-emitting units, the arrangement direction of the plurality of first light-emitting units being perpendicular to the first direction; the second light-emitting device includes a plurality of spaced-apart second light-emitting units, the arrangement direction of the plurality of second light-emitting units being perpendicular to the first direction, and the first light-emitting units and the second light-emitting units are Nano LEDs.

[0007] In some embodiments, the arrangement density of the plurality of first light-emitting units in the first light-emitting device is less than the arrangement density of the plurality of second light-emitting units in the second light-emitting device.

[0008] In some embodiments, each of the light-emitting units includes a first electrode, a first semiconductor layer, a light-emitting layer, a second semiconductor layer, and a second electrode stacked sequentially, wherein the first electrodes of the plurality of light-emitting units are interconnected, and the second electrodes of the plurality of light-emitting units are interconnected.

[0009] In some embodiments, a passivation layer is further provided between the first electrode and the second electrode, the passivation layer being disposed around the first semiconductor layer, the light-emitting layer and the second semiconductor layer.

[0010] In some embodiments, the third light-emitting device is a blue light-emitting device, and one of the first light-emitting device and the second light-emitting device is a red light-emitting device and the other is a green light-emitting device.

[0011] In some embodiments, the center lines of the first light-emitting device, the second light-emitting device, and the third light-emitting device coincide with each other.

[0012] In some embodiments, each light-emitting unit includes a first electrode, a first semiconductor layer, a light-emitting layer, a second semiconductor layer, and a second electrode sequentially stacked along a direction away from the substrate; the third light-emitting device includes a third electrode, a third semiconductor layer, a light-emitting functional layer, a fourth semiconductor layer, and a fourth electrode sequentially stacked; wherein, the first electrode in the first light-emitting device is a reflective electrode, and the second electrode in the first light-emitting device, the first electrode and the second electrode in the second light-emitting device, and the third electrode and the fourth electrode in the third light-emitting device are all transparent electrodes.

[0013] In some embodiments, the display panel further includes a lens disposed on the side of the third light-emitting device away from the substrate.

[0014] On the other hand, this application also provides a display device, which includes the display panel described in any of the above embodiments.

[0015] In the display panel provided in this application embodiment, since the third light-emitting device is a Micro LED, and at least one of the first and second light-emitting devices includes multiple Nano LEDs, the light pattern emitted by at least one of the first and second light-emitting devices is more converged. This helps to avoid the serious problem of viewing angle distortion caused by the large change in color ratio due to the large intensity of the light emitted by at least one of the first and second light-emitting devices at an oblique viewing angle. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the structure of a light-emitting device in related technologies;

[0017] Figure 2 This is a schematic diagram of the structure of a light-emitting device according to some embodiments of this application;

[0018] Figure 3 This is a schematic diagram of the structure of a first light-emitting device or a second light-emitting device according to some embodiments of this application;

[0019] Figure 4 This is a schematic diagram of the structure of a third light-emitting device according to some embodiments of this application;

[0020] Figure 5 This is a schematic diagram showing the light emission intensity of a light-emitting device with Nano LED and a Micro LED at different viewing angles;

[0021] Figure 6 This is a partial structural schematic diagram of a first light-emitting device according to some embodiments of this application;

[0022] Figure 7 This is a partial structural schematic diagram of a second light-emitting device according to some embodiments of this application;

[0023] Figure 8 This is a simulation diagram of light emission from a light-emitting device in related technologies;

[0024] Figure 9 These are simulation diagrams of light emission from the light-emitting devices provided in some embodiments of this application;

[0025] Figure 10 This is a schematic diagram of the structure of a display panel provided in some embodiments of this application;

[0026] Figure 11 This is a schematic diagram of the structure of a display device provided in some embodiments of this application. Detailed Implementation

[0027] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings. The described technical solutions are for illustrative purposes only and should not be construed as limiting the scope of protection of this application.

[0028] In the description of this application, it should be understood that the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different technical features. The terms "multiple" and similar words mean two or more, unless otherwise expressly defined.

[0029] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0030] The use of "applies to" or "configured to" in this application implies open and inclusive language, which does not exclude the applicability to or configuration to devices performing additional tasks or steps. Additionally, the use of "based on" implies openness and inclusivity, because processes, steps, calculations, or other actions "based on" one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0031] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application.

[0032] The various embodiments of this application are similar, and features from different embodiments and / or different examples can be combined with each other.

[0033] In related technologies, such as Figure 1 As shown, the light-emitting components typically include red light-emitting devices 01, green light-emitting devices 02, and blue light-emitting devices 03 arranged vertically, thus enabling full-color display. Furthermore, the red light-emitting devices 01, green light-emitting devices 02, and blue light-emitting devices 03 all utilize Micro LEDs, therefore possessing roughly the same light emission pattern (e.g., ...). Figure 1 (As shown by the diverging dashed lines in the image). However, the light-emitting centers of the red light-emitting device 01, the green light-emitting device 02, and the blue light-emitting device 03 have a height difference in the vertical direction, which causes the user to experience a height difference when viewing from an angle (e.g., at an angle of tilt). Figure 1 When observed from the first position (04) shown, there is a mismatch in the light intensity emitted by the red light-emitting device 01, the green light-emitting device 02, and the blue light-emitting device 03. Therefore, when the user is at an angle (such as...), the light intensity will be different. Figure 1 When observed from the first position 04 shown, the color ratio of the red light-emitting device 01, the green light-emitting device 02, and the blue light-emitting device 03 at this viewing angle is different from that at the user's normal viewing angle (e.g., ...). Figure 1 The second position (05) shown in the figure shows a significant change during observation, which leads to a serious problem of visual role bias.

[0034] Furthermore, due to the small size and high brightness of Micro LEDs, they are heavily relied upon in VR (Virtual Reality) and AR (Augmented Reality) displays. In the field of AR display technology, the vertical stacking of multiple light-emitting devices results in severe viewpoint distortion, and the diffraction waveguides in AR displays are extremely sensitive to the topological position of light rays, easily leading to severe image-text color separation.

[0035] Based on this, some embodiments of this application provide a display panel, which includes a substrate and light-emitting components disposed on the substrate. For example... Figure 2 As shown, the light-emitting component 100 includes a first light-emitting device 10, a second light-emitting device 20, and a third light-emitting device 30 sequentially disposed on a substrate along a first direction X. The first light-emitting device 10, the second light-emitting device 20, and the third light-emitting device 30 are sequentially disposed on the substrate along the first direction X, meaning that the first direction X is the same as the thickness direction of the substrate. The first light-emitting device 10, the second light-emitting device 20, and the third light-emitting device 30 emit different colors. For example, one of the first light-emitting device 10, the second light-emitting device 20, and the third light-emitting device 30 emits red light, while the other two emit green light and blue light respectively, thus achieving color display.

[0036] The light-emitting component 100 emits light along the direction of the third light-emitting device 30 away from the second light-emitting device 20, such as... Figure 2 As shown, the light emission direction of the light-emitting component 100 is the direction indicated by the arrow marked L.

[0037] like Figure 3 As shown, at least one of the first light-emitting device 10 and the second light-emitting device 20 includes a plurality of spaced-apart light-emitting units 101, the arrangement direction of which is perpendicular to the first direction X. For example, the arrangement direction of the plurality of light-emitting units 101 may be along the second direction Y, and the second direction Y is perpendicular to the first direction X. Another example is that the plurality of light-emitting units 101 may be arranged in a planar array, and the extension direction of the plane is perpendicular to the first direction X. In this case, each light-emitting unit 101 may form multiple rows of light-emitting units 101 along the second direction Y, and the plurality of light-emitting units 101 in each row are spaced-apart along a third direction, wherein the third direction and the second direction Y are respectively perpendicular to the first direction X.

[0038] In this design, the light-emitting unit 101 is a Nano LED, and at least one of the first light-emitting device 10 and the second light-emitting device 20 is a light-emitting device composed of multiple Nano LEDs. The size of the Nano LED is less than 1 micrometer.

[0039] like Figure 4 As shown, the third light-emitting device 30 is a Micro LED. For example, the size of a Micro LED is greater than 1 micrometer and less than or equal to 100 micrometers.

[0040] The inventor discovered through research that, for example Figure 5As shown, for light-emitting devices of the same size, both larger than 1 micrometer and smaller than 100 micrometers, when the light-emitting device includes multiple Nano LEDs, the light intensity of the light-emitting device including Nano LEDs decreases more significantly compared to the light intensity of Micro LEDs as the viewing angle increases. This also means that the light pattern of Nano LEDs is more convergent than that of Micro LEDs. It is worth noting that in this article, "light pattern" mainly refers to the change in light intensity with viewing angle. Convergence of the light pattern mainly refers to the situation at a larger viewing angle.

[0041] For the display panel provided in this application embodiment, since the third light-emitting device 30 is a Micro LED, and at least one of the first light-emitting device 10 and the second light-emitting device 20 includes multiple Nano LEDs, such as Figure 2 As shown, this makes the light pattern emitted by at least one of the first light-emitting device 10 and the second light-emitting device 20 more convergent, thereby helping to avoid the serious problem of viewing angle distortion caused by the large intensity of the light emitted by at least one of the first light-emitting device 10 and the second light-emitting device 20 having a large change in the color ratio due to the large color mixing.

[0042] In some examples, the first light-emitting device 10 includes a plurality of spaced-apart light-emitting units 101 arranged perpendicular to the first direction X, and the light-emitting units 101 are Nano LEDs. In this case, the light emitted by the first light-emitting device 10 is more convergent, which helps to avoid the problem of severe viewing angle distortion caused by the large change in the color ratio due to the large intensity of the light emitted by the first light-emitting device 10 at an oblique viewing angle.

[0043] In other examples, the second light-emitting device 20 includes a plurality of spaced-apart light-emitting units 101 arranged perpendicular to the first direction X, and the light-emitting units 101 are Nano LEDs. In this case, the light emitted by the second light-emitting device 20 is more convergent, which helps to avoid the problem of severe viewing angle distortion caused by the large change in the color ratio due to the large intensity of the light emitted by the second light-emitting device 20 at an oblique viewing angle.

[0044] In some embodiments, the first light-emitting device 10 and the second light-emitting device 20 each include a plurality of spaced-apart light-emitting units 101, the arrangement direction of the plurality of light-emitting units 101 being perpendicular to the first direction X. As one implementation, such as... Figure 6 and Figure 7As shown, the first light-emitting device 10 includes a plurality of first light-emitting units 1001 arranged at intervals, and the arrangement direction of the plurality of first light-emitting units 1001 is perpendicular to the first direction X; the second light-emitting device 20 includes a plurality of second light-emitting units 1002 arranged at intervals, and the arrangement direction of the plurality of second light-emitting units 1002 is perpendicular to the first direction X; wherein, the first light-emitting unit 1001 and the second light-emitting unit 1002 are both Nano LEDs.

[0045] In some embodiments, such as Figure 6 and Figure 7 As shown, the arrangement density of the first light-emitting unit 1001 in the first light-emitting device 10 is less than the arrangement density of the second light-emitting unit 1002 in the second light-emitting device 20. That is, for the first light-emitting device 10 and the second light-emitting device 20, within the same area, the number of the first light-emitting unit 1001 is less than the number of the second light-emitting unit 1002.

[0046] In this case, as the viewing angle increases, the light intensity of the first light-emitting device 10 is significantly reduced compared to the light intensity of the second light-emitting device 20. Therefore, the light pattern of the first light-emitting device 10 is more converged than that of the second light-emitting device 20. This makes the light patterns of the first light-emitting device 10, the second light-emitting device 20, and the third light-emitting device 30 more matched, thereby significantly alleviating the problem of severe viewpoint bias.

[0047] In some examples, the size of the first light-emitting unit 1001 is the same as the size of the second light-emitting unit 1002. In this case, the spacing between two adjacent first light-emitting units 1001 in the first light-emitting device 10 is greater than the spacing between two adjacent second light-emitting units 1002 in the second light-emitting device 20.

[0048] In some embodiments, the size of the Micro LED can be greater than 1 micrometer and less than or equal to 10 micrometers, which makes the Micro LED smaller in size to better meet the miniaturization requirements of VR or AR devices.

[0049] In some examples, the size of a Nano LED can be greater than 0 and less than or equal to 0.5 micrometers.

[0050] For example, the size of a Micro LED can be 5 micrometers, while the size of a Nano LED is 0.2 micrometers.

[0051] In some embodiments, the first light-emitting device 10, the second light-emitting device 20, and the third light-emitting device 30 may have the same size. That is, although the first light-emitting device 10 and / or the second light-emitting device 20 include multiple Nano LEDs, their overall size may be the same as that of the third light-emitting device 30.

[0052] This configuration allows the light pattern of the first light-emitting device 10 (and / or the second light-emitting device 20) to be adapted to the size requirements of the light-emitting component 100, while also enabling the light pattern of the first light-emitting device 10 (and / or the second light-emitting device 20) to be adapted to the third light-emitting device 30.

[0053] Here, the size of a Micro LED can refer to its dimension along the second direction Y, while the size of a Nano LED refers to its dimension along the second direction Y. In this case, the largest dimension among multiple Nano LEDs in the second direction is the size of the light-emitting device including that Nano LED.

[0054] For example, the size of the third light-emitting device 30 is 5 micrometers; when the first light-emitting device 10 includes multiple Nano LEDs, the maximum size between the Nano LEDs located at both ends in the second direction of the first light-emitting device 10 is also 5 micrometers.

[0055] In some embodiments, such as Figure 3 As shown, each light-emitting unit 101 (i.e., Nano LED) includes a first electrode 1011, a first semiconductor layer 1012, a light-emitting layer 1013, a second semiconductor layer 1014, and a second electrode 1015, which are sequentially stacked along a direction away from the substrate. The first electrodes 1011 in the plurality of light-emitting units 101 are interconnected, and the second electrodes 1015 in the plurality of light-emitting units 101 are interconnected. As an example, the plurality of first electrodes 1011 may be arranged in a single layer, and the plurality of second electrodes 1015 may also be arranged in a single layer.

[0056] In this case, all light-emitting units 101 can be driven to emit light by driving the electrode layers corresponding to the first electrode 1011 and the second electrode 1015 respectively, thereby realizing the driving of the light-emitting device including the light-emitting unit 101.

[0057] In some examples, the first electrode 1011 in the first light-emitting device 10 (the first electrode 1011 is the electrode of the first light-emitting device 10 near the substrate) can be a metal electrode, and the second electrode 1015 in the first light-emitting device 10 and the first electrode 1011 and the second electrode 1015 in the second light-emitting device 20 are both transparent electrodes. Since the first electrode 1011 in the first light-emitting device 10 is a metal electrode, it can reflect light from the first light-emitting device 10, the second light-emitting device 20, and the third light-emitting device 30, thereby causing the light-emitting component 100 to emit light along the direction from the first light-emitting device 10 towards the third light-emitting device 30. By making the second electrode 1015 in the first light-emitting device 10 and the first electrode 1011 and the second electrode 1015 in the second light-emitting device 20 transparent electrodes, the light utilization rate of the display panel can be improved.

[0058] As an example, metal electrodes can be made of materials such as silver and magnesium; transparent electrodes can be made of materials such as indium tin oxide and indium zinc oxide. This application does not limit the specific choice of materials.

[0059] In some examples, the material of the first semiconductor layer 1012 can be N-type GaN (gallium nitride); the light-emitting layer 1013 can be an InGaN / GaN (gallium indium / gallium nitride) multiple quantum well layer (MQWs), for example, a 6-cycle InGaN / GaN multiple quantum well layer; and the material of the second semiconductor layer 1014 can be P-type GaN.

[0060] For example, the first semiconductor layer 1012 can be 300 nanometers, the light-emitting layer 1013 can be 150 nanometers, and the second semiconductor layer 1014 can be 150 nanometers.

[0061] In some examples, the light-emitting unit 101 further includes a capping layer 1016 located on the second semiconductor layer 1014. The capping layer 1016 can provide a certain degree of protection for the light-emitting unit 101. In addition, the capping layer 1016 can modulate the light to achieve better light emission. As one implementation, the material of the capping layer 1016 can be the same as that of the second semiconductor layer 1014, for example, both can be p-type GaN.

[0062] In some embodiments, such as Figure 3 As shown, a passivation layer 1017 is provided between the first electrode 1011 and the second electrode 1015. The passivation layer 1017 is disposed around the first semiconductor layer 1012, the light-emitting layer 1013 and the second semiconductor layer 1014 to effectively protect the light-emitting unit 101, thereby improving the stability of the light-emitting unit 101 and thus improving the reliability of the corresponding display device.

[0063] In some examples, the material of the passivation layer 1017 can be silicon oxide.

[0064] In some embodiments, such as Figure 4 As shown, the third light-emitting device 30 includes a third electrode 301, a third semiconductor layer 302, a light-emitting functional layer 303, a fourth semiconductor layer 304, and a fourth electrode 305, which are stacked sequentially.

[0065] The materials of the third semiconductor layer 302, the light-emitting functional layer 303, and the fourth semiconductor layer 304 can be set with reference to the first semiconductor layer 1012, the light-emitting layer 1013, and the second semiconductor layer 1014, respectively, with the only difference being the size.

[0066] In some examples, the third electrode 301 and the fourth electrode 305 are both transparent electrodes, which can further improve the light utilization of the display panel.

[0067] It is worth noting that the light-emitting functional layer 303 in the third light-emitting device 30 is continuous, while the light-emitting layer 1013 in the first light-emitting device 10 or the second light-emitting device 20, which includes the light-emitting unit 101, is disconnected.

[0068] In some embodiments, such as Figure 2 As shown, the center lines of the first light-emitting device 10, the second light-emitting device 20, and the third light-emitting device 30 coincide with each other. For example, the first light-emitting device 10, the second light-emitting device 20, and the third light-emitting device 30 all use the same center line P as their respective center lines.

[0069] In this case, the position of the center line P represents the light-emitting center line of the light-emitting component 100. Along this light-emitting center line, the light intensity emitted by the light-emitting component 100 is relatively high.

[0070] Since the center lines of the first light-emitting device 10, the second light-emitting device 20, and the third light-emitting device 30 coincide with each other, the light patterns of the first light-emitting device 10, the second light-emitting device 20, and the third light-emitting device 30 can adapt to each other, thereby making the light emission uniformity of the display panel excellent.

[0071] It is worth noting that the cross-section of the aforementioned light-emitting device (e.g., the first light-emitting device 10, the second light-emitting device 20, or the third light-emitting device 30) perpendicular to its thickness direction can be circular or polygonal. The geometric center of this cross-section is located on the center line of the corresponding light-emitting device, and this center line extends along the thickness direction of the light-emitting device.

[0072] For example, when the cross-section of the light-emitting device perpendicular to its thickness direction is circular, the center of the circle is located on the center line of the light-emitting device. As another example, when the cross-section of the light-emitting device perpendicular to its thickness direction is square, the center point of the square is located on the center line of the light-emitting device.

[0073] In some embodiments, the third light-emitting device 30 is a blue light-emitting device, that is, the third light-emitting device 30 emits blue light. One of the first light-emitting device 10 and the second light-emitting device 20 is a red light-emitting device, and the other is a green light-emitting device. The red light-emitting device emits red light, and the green light-emitting device emits green light.

[0074] For example, the first light-emitting device 10 is a red light-emitting device, and the second light-emitting device 20 is a green light-emitting device. Or, for another example, the first light-emitting device 10 is a green light-emitting device, and the second light-emitting device 20 is a red light-emitting device.

[0075] Because blue light has relatively high energy, it can be excited into red light when passing through a red light-emitting device, making it difficult for the light-emitting component to emit blue light. Therefore, this application places the red light-emitting device below the blue light-emitting device, thereby ensuring that the light-emitting component 100 can successfully emit blue light, which is beneficial for achieving full-color display of the display panel.

[0076] The inventors also discussed display panels in related technologies (including such as...) Figure 1 The light-emitting components shown) and the display panel provided in the above embodiments of this application (including, as shown) Figure 2 The light-emitting component 100 shown was simulated to obtain the following results: Figure 8 and Figure 9 The simulation diagram is shown, and the color deviation values ​​(JNCD values) of the two are calculated based on the color coordinates CIExy, as shown in Table 1.

[0077]

[0078] Table 1

[0079] The JNCD value can be calculated using the following formula:

[0080] Regarding the display panel provided in the embodiments of this application, from Figure 8 and Figure 9 As can be seen, compared to display panels in related technologies, the white light spot area in the center of the light-emitting component 100 is relatively larger, and the color depth around the white light spot is relatively smaller. Referring to Table 1, where data 1 represents simulation data obtained from display panels in related technologies, and data 2 represents simulation data obtained from the display panel provided in this embodiment, it can be seen that when the light-emitting component 100 in the display panel is tilted 20 degrees off the vertical optical axis, the color difference is significantly reduced from 16.8 JNCD in related technologies to 0.5 JNCD. Therefore, the angular dispersion problem of the display panel provided in this embodiment is effectively improved.

[0081] like Figure 10 As shown, the display panel 200 includes a substrate 201 and a light-emitting component 100 located on the substrate 201.

[0082] In some examples, there are multiple light-emitting components 100, and the multiple light-emitting components 100 can be arranged in an array on the substrate 201.

[0083] In some examples, the display panel 200 can be used for lighting; in other examples, the display panel 200 can be used for displaying images.

[0084] In some embodiments, the display panel 200 further includes a lens 40, which is located on the side of the third light-emitting device 30 away from the substrate 201. By providing the lens 40, the emitted light from the light-emitting component 100 can be adjusted, thereby enabling the display panel 200 to achieve a good light emission effect.

[0085] In some examples, the number of lenses 40 can be the same as the number of light-emitting components 100. That is, each light-emitting component 100 has a corresponding lens 40 on the side away from the substrate 201.

[0086] As an example, the main optical axis of the lens 40 coincides with the center line P of the corresponding light-emitting component 100 (the center lines of all light-emitting devices in the light-emitting component 100 are coincident), which helps to improve the adjustment effect of the lens 40 on the emitted light of the light-emitting component 100, thereby improving the light emission effect of the display panel 200.

[0087] Some embodiments of this application also provide a display device, such as... Figure 11 As shown, the display device 300 includes a display panel 200.

[0088] Since it includes the display panel 200, the display device 300 has the technical effects of the display panel 200 described above, which will not be repeated here.

[0089] In some examples, the display device 300 also includes a fastener for securing the display panel 200.

[0090] For example, the display device 300 can be a VR display device or an AR display device.

[0091] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A display panel, characterized in that, include: A substrate and a first light-emitting device, a second light-emitting device, and a third light-emitting device are sequentially disposed on the substrate along a first direction. The first light-emitting device, the second light-emitting device, and the third light-emitting device emit different colors. The first direction is the same as the thickness direction of the substrate. At least one of the first light-emitting device and the second light-emitting device includes a plurality of spaced-apart light-emitting units, the arrangement direction of the plurality of light-emitting units is perpendicular to the first direction, the light-emitting units are Nano LEDs, and the third light-emitting device is a Micro LED.

2. The display panel according to claim 1, characterized in that, The first light-emitting device includes a plurality of first light-emitting units arranged at intervals, the arrangement direction of the plurality of first light-emitting units being perpendicular to the first direction; the second light-emitting device includes a plurality of second light-emitting units arranged at intervals, the arrangement direction of the plurality of second light-emitting units being perpendicular to the first direction, and the first light-emitting units and the second light-emitting units are Nano LEDs.

3. The display panel according to claim 2, characterized in that, The arrangement density of the plurality of first light-emitting units in the first light-emitting device is less than the arrangement density of the plurality of second light-emitting units in the second light-emitting device.

4. The display panel according to claim 1, characterized in that, Each of the light-emitting units includes a first electrode, a first semiconductor layer, a light-emitting layer, a second semiconductor layer, and a second electrode stacked sequentially. The first electrodes of the plurality of light-emitting units are interconnected, and the second electrodes of the plurality of light-emitting units are interconnected.

5. The display panel according to claim 4, characterized in that, A passivation layer is further provided between the first electrode and the second electrode, and the passivation layer is disposed around the first semiconductor layer, the light-emitting layer and the second semiconductor layer.

6. The display panel according to any one of claims 1-5, characterized in that, The third light-emitting device is a blue light-emitting device, and one of the first light-emitting device and the second light-emitting device is a red light-emitting device and the other is a green light-emitting device.

7. The display panel according to any one of claims 1-5, characterized in that, The center lines of the first light-emitting device, the second light-emitting device, and the third light-emitting device coincide with each other.

8. The display panel according to any one of claims 1-5, characterized in that, Each of the light-emitting units includes a first electrode, a first semiconductor layer, a light-emitting layer, a second semiconductor layer, and a second electrode, which are sequentially stacked along a direction away from the substrate. The third light-emitting device includes a third electrode, a third semiconductor layer, a light-emitting functional layer, a fourth semiconductor layer, and a fourth electrode, which are stacked sequentially. Wherein, the first electrode in the first light-emitting device is a reflective electrode, and the second electrode in the first light-emitting device, the first electrode and the second electrode in the second light-emitting device, and the third electrode and the fourth electrode in the third light-emitting device are all transparent electrodes.

9. The display panel according to any one of claims 1-5, characterized in that, The display panel also includes a lens, which is disposed on the side of the third light-emitting device away from the substrate.

10. A display device, characterized in that, Includes the display panel as described in any one of claims 1-9.

Images