Micro light emitting device display panel

Abstract

The application discloses a micro light emitting device display panel, comprising a substrate, a plurality of light emitting devices, an encapsulation layer and a microlens layer; the light emitting devices are arranged on the substrate; the encapsulation layer is arranged on the substrate, and the encapsulation layer covers the light emitting devices; the microlens layer is arranged on the side, away from the substrate, of the encapsulation layer, and the microlens layer comprises a plurality of microlenses; wherein in a first direction of the light emitting devices, the length of the first light emitting layer is less than the difference between the length of the second light emitting layer and the length of the third light emitting layer by a preset value.

Description

Technical Field

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

[0002] In traditional micro-light-emitting device (MSP) display panels, a microlens layer is placed on the side of the light-emitting device layer furthest from the substrate to improve the brightness of the displayed image. The microlens layer guides the light from the light-emitting device towards the light-emitting surface of the display panel, thereby increasing the brightness. However, while the microlens layer enhances brightness, it also causes color shift in white images when viewed from the side. Summary of the Invention

[0003] Embodiments of this application provide a micro-light-emitting device display panel to improve the color shift problem of white display images from the side viewing angle.

[0004] In a first aspect, embodiments of this application provide a micro-light-emitting device display panel, comprising:

[0005] substrate;

[0006] Multiple light-emitting devices are disposed on the substrate. The light-emitting devices include red light-emitting devices, green light-emitting devices, and blue light-emitting devices. The red light-emitting devices, green light-emitting devices, and blue light-emitting devices are arranged at intervals. The red light-emitting device includes a first light-emitting layer, the green light-emitting device includes a second light-emitting layer, and the blue light-emitting device includes a third light-emitting layer.

[0007] An encapsulation layer is disposed on the substrate and covers the light-emitting device;

[0008] A microlens layer is disposed on the side of the encapsulation layer away from the substrate, and the microlens layer includes a plurality of microlenses;

[0009] In the first direction of the light-emitting device, the difference between the length of the first light-emitting layer and the lengths of the second and third light-emitting layers is less than a preset value.

[0010] Furthermore, the microlens is hemispherical, and each microlens covers one of the light-emitting devices, with the axial direction of the microlens coinciding with the direction of the central axis of the corresponding light-emitting device.

[0011] Furthermore, the microlens is cylindrical, and a plurality of the microlenses are arranged side by side in the first direction of the light-emitting device, and the microlenses extend along the second direction of the light-emitting device, with each microlens covering a row of light-emitting devices arranged along the second direction of the light-emitting device.

[0012] Furthermore, in the first direction of the light-emitting unit, the length of the first light-emitting layer is equal to the length of the second light-emitting layer, and / or the length of the first light-emitting layer is equal to the length of the third light-emitting layer.

[0013] Furthermore, in the first direction of the light-emitting unit, the difference between the length of the first light-emitting layer and the length of the second light-emitting layer is no greater than 10% of the length of the light-emitting device, and / or the difference between the length of the first light-emitting layer and the length of the third light-emitting layer is no greater than 10% of the length of the light-emitting device.

[0014] Furthermore, in the first direction of the light-emitting device, the red light-emitting device, the green light-emitting device, and the blue light-emitting device have equal lengths, and the dimensions of two adjacent microlenses are the same.

[0015] Furthermore, in the first direction of the light-emitting device, the length of the green light-emitting device is greater than the length of the red light-emitting device, and the length of the blue light-emitting device is greater than the length of the red light-emitting device.

[0016] Furthermore, the red light-emitting device further includes a first horizontal electrode, a first transparent electrode layer, a first semiconductor layer, a second semiconductor layer, and a first vertical electrode. The first horizontal electrode is electrically connected to the substrate. The first transparent electrode layer is disposed on the side of the first horizontal electrode away from the substrate. The first semiconductor layer is disposed on the surface of the first transparent electrode layer away from the substrate. The first light-emitting layer is disposed on the surface of the first semiconductor layer away from the substrate. The second semiconductor layer is disposed on the surface of the first light-emitting layer away from the substrate. One end of the first vertical electrode is connected to the second semiconductor layer, and the other end of the first vertical electrode is electrically connected to the substrate.

[0017] The green light-emitting device further includes a second horizontal electrode, a second transparent electrode layer, a third semiconductor layer, a fourth semiconductor layer, and a second vertical electrode. The second horizontal electrode is electrically connected to the substrate. The second transparent electrode layer is disposed on the side of the second horizontal electrode away from the substrate. The third semiconductor layer is disposed on the surface of the second transparent electrode layer away from the substrate. The second light-emitting layer is disposed on the surface of the third semiconductor layer away from the substrate. The fourth semiconductor layer is disposed on the surface of the second light-emitting layer away from the substrate. One end of the second vertical electrode is connected to the fourth semiconductor layer, and the other end of the second vertical electrode is electrically connected to the substrate.

[0018] The blue light-emitting device further includes a third horizontal electrode, a third transparent electrode layer, a fifth semiconductor layer, a sixth semiconductor layer, and a third vertical electrode. The third horizontal electrode is electrically connected to the substrate. The third transparent electrode layer is disposed on the side of the third horizontal electrode away from the substrate. The fifth semiconductor layer is disposed on the surface of the third transparent electrode layer away from the substrate. The third light-emitting layer is disposed on the surface of the fifth semiconductor layer away from the substrate. The sixth semiconductor layer is disposed on the surface of the third light-emitting layer away from the substrate. One end of the third vertical electrode is connected to the sixth semiconductor layer, and the other end of the third vertical electrode is electrically connected to the substrate.

[0019] In the top view of the display panel, the area of ​​the first vertical electrode is smaller than the area of ​​the second vertical electrode and the area of ​​the third vertical electrode.

[0020] Furthermore, in the second direction of the light-emitting device, the lengths of the red light-emitting device, the green light-emitting device, and the blue light-emitting device are equal. Furthermore, the spacing between any two adjacent red light-emitting devices, the spacing between any two adjacent green light-emitting devices, and the spacing between any two adjacent blue light-emitting devices in the first direction of the light-emitting device are equal.

[0021] The beneficial effects of this application are:

[0022] This application provides a micro-light-emitting device (MSD) display panel. By configuring the light-emitting devices to include red, green, and blue light-emitting devices, which are spaced apart, each red light-emitting device includes a first light-emitting layer, each green light-emitting device includes a second light-emitting layer, and each blue light-emitting device includes a third light-emitting layer, in a first direction of the light-emitting devices, the difference between the length of the first light-emitting layer and the lengths of the second and third light-emitting layers is less than a preset value. This ensures that in the first direction of the light-emitting devices, the length of the second light-emitting layer of each green light-emitting device and the length of the third light-emitting layer of each blue light-emitting device can match the length of the first light-emitting layer of each red light-emitting device. This guarantees that the brightness of the red, green, and blue light-emitting devices is similar at different viewing angles of the white display screen on the MSD display panel, thereby reducing the brightness difference of the red, green, and blue light-emitting devices at different viewing angles of the white display screen on the MSD display panel, and thus improving the color shift problem of the white display screen on the MSD display panel at different viewing angles. Attached Figure Description

[0023] Figure 1 This is a graph showing the relationship between the light intensity of red, green, and blue light-emitting devices in a traditional micro-light-emitting device display panel at different side viewing angles.

[0024] Figure 2 This is a top view of the micro-light-emitting device display panel of this application;

[0025] Figure 3 This is a schematic diagram of the micro-light-emitting device display panel of this application;

[0026] Figure 4 yes Figure 3 The diagram shown is a schematic diagram of the first structure of the microlens layer of the micro-light-emitting device display panel of this application.

[0027] Figure 5 yes Figure 3 The diagram shown is a schematic diagram of a second structure of the microlens layer of the micro-light-emitting device display panel of this application.

[0028] Figure 6 This is a top view of the red light-emitting device of the micro-light-emitting device display panel of this application;

[0029] Figure 7 yes Figure 6 The diagram shows the structure of the red light-emitting device in the micro-light-emitting device display panel.

[0030] Figure 8 This is a top view of the green light-emitting device of the micro-light-emitting device display panel of this application;

[0031] Figure 9 yes Figure 8 The diagram shows the structure of the green light-emitting device in the micro-light-emitting device display panel.

[0032] Figure 10 This is a top view of the blue light-emitting device of the micro-light-emitting device display panel of this application;

[0033] Figure 11 yes Figure 10 The diagram shows the structure of the blue light-emitting device in the micro-light-emitting device display panel.

[0034] Figure 12 This is a graph showing the relationship between the light intensity of the red, green, and blue light-emitting devices of the micro-light-emitting device display panel of this application and the side viewing angle.

[0035] 10 - Micro-light-emitting device display panel; 100 - Substrate; 200 - Light-emitting device; 210 - Red light-emitting device; 211 - First light-emitting layer; 212 - First transparent electrode layer; 213 - First semiconductor layer; 214 - Second semiconductor layer; 215 - First vertical electrode; 216 - First horizontal electrode; 220 - Green light-emitting device; 221 - Second light-emitting layer; 222 - Second transparent electrode layer; 223 - Third semiconductor layer; 224 - Fourth semiconductor layer; 225 - First vertical electrode; 226 - Second horizontal electrode; 230 - Blue light-emitting device; 231 - Third light-emitting layer; 232 - Third transparent electrode layer; 233 - Fifth semiconductor layer; 234 - Sixth semiconductor layer; 235 - First vertical electrode; 236 - Third horizontal electrode; 300 - Encapsulation layer; 400 - Microlens layer; 410 - Microlens. Detailed Implementation

[0036] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings. The technical solutions described below are for illustrative purposes only and should not be construed as limiting the scope of protection of this application.

[0037] Furthermore, 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 indicate two or more unless otherwise expressly specified.

[0038] The first embodiment of this application provides a micro-light-emitting device display panel 10, see reference. Figure 2 , Figure 3 , Figure 4The micro-light-emitting device display panel 10 includes a substrate 100, a plurality of light-emitting devices 200, an encapsulation layer 300, and a microlens layer 400. The light-emitting devices 200 are disposed on the substrate 100, and each light-emitting device 200 includes a red light-emitting device 210, a green light-emitting device 220, and a blue light-emitting device 230. The red light-emitting device 210, green light-emitting device 220, and blue light-emitting device 230 are spaced apart. The red light-emitting device 210 includes a first light-emitting layer 211, the green light-emitting device 220 includes a second light-emitting layer 221, and the blue light-emitting device 230 is encapsulated. The light-emitting device 200 includes a third light-emitting layer 231; an encapsulation layer 300 is disposed on the substrate 100 and covers the light-emitting device 200; a microlens layer 400 is disposed on the side of the encapsulation layer 300 away from the substrate 100, and the microlens layer 400 includes a plurality of microlenses 410 arranged in an array; wherein the microlenses are hemispherical, each microlens covers one of the light-emitting devices, and in a first direction of the light-emitting device 200, the difference between the length of the first light-emitting layer and the lengths of the second and third light-emitting layers is less than a preset value.

[0039] refer to Figure 1 Because the materials of the light-emitting layers of the red, green, and blue light-emitting devices in the traditional micro-light-emitting device display panel 10 are different, when the red, green, and blue light-emitting devices are the same size, the area of ​​the light-emitting layer of the red light-emitting device is larger than that of the green and blue light-emitting devices. After setting a microlens layer on the side of the light-emitting device layer away from the substrate, the viewing angle difference between the red, green, and blue light-emitting devices increases. Within a viewing angle range of 18° to 25°, the white display image of the micro-light-emitting device display panel 10 will appear reddish, causing a color shift problem in the white display image of the micro-light-emitting device display panel 10. (Reference) Figure 12Therefore, by configuring the light-emitting device 200 to include a red light-emitting device 210, a green light-emitting device 220, and a blue light-emitting device 230, with the red light-emitting device 210, the green light-emitting device 220, and the blue light-emitting device 230 spaced apart, the red light-emitting device 210 includes a first light-emitting layer 211, the green light-emitting device 220 includes a second light-emitting layer 221, and the blue light-emitting device 230 includes a third light-emitting layer 231, and in the first direction of the light-emitting device 200, the difference between the length of the first light-emitting layer and the lengths of the second and third light-emitting layers is less than a preset value; thus, in the first direction of the light-emitting device 200, each light-emitting device 210... The lengths of the second light-emitting layer 221 of the green light-emitting device 220 and the third light-emitting layer 231 of the blue light-emitting device 230 can be matched with the length of the first light-emitting layer 211 of the red light-emitting device 210. This ensures that the brightness of the red light-emitting device 210, the green light-emitting device 220, and the blue light-emitting device 230 is similar at different side viewing angles of the white display screen of the micro-light-emitting device display panel 10, thereby reducing the brightness difference of the red light-emitting device 210, the green light-emitting device 220, and the blue light-emitting device 230 at different side viewing angles of the white display screen of the micro-light-emitting device display panel 10, and thus improving the color shift problem of the white display screen of the micro-light-emitting device display panel 10 at different side viewing angles.

[0040] In this embodiment, the axial direction of the microlens coincides with the direction of the central axis of the corresponding light-emitting device.

[0041] It should be noted that the axis of the microlens is perpendicular to the light-emitting surface of the micro-light-emitting device display panel, and the central axis of the light-emitting device is perpendicular to the light-emitting surface of the micro-light-emitting device display panel.

[0042] It should be noted that, in the above embodiments, the difference between the length of the first light-emitting layer and the length of the second light-emitting layer and the length of the third light-emitting layer being less than a preset value can be that the difference between the length of the first light-emitting layer 211 and the length of the second light-emitting layer 221 and the third light-emitting layer 231 is 0, that is, the length of the first light-emitting layer 211 is equal to the length of the second light-emitting layer 221 and the third light-emitting layer 231, or the difference between the length of the first light-emitting layer and the length of the second light-emitting layer and the length of the third light-emitting layer is not greater than 10% of the length of the light-emitting device. Specifically, by setting the difference between the length of the first light-emitting layer and the lengths of the second and third light-emitting layers to be no more than 10% of the length of the light-emitting device, on the one hand, the brightness difference of the red light-emitting device 210, the green light-emitting device 220, and the blue light-emitting device 230 under different side viewing angles of the white display screen of the micro-light-emitting device display panel 10 can be reduced, thereby improving the color shift problem of the white display screen of the micro-light-emitting device display panel 10 under side viewing angles. On the other hand, it can avoid the problem of color shift in the micro-light-emitting device display panel 10 at large viewing angles caused by the excessive length difference between the second light-emitting layer 221 and the first light-emitting layer 211 in the first direction of the light-emitting device 200, and the excessive length difference between the third light-emitting layer 231 and the first light-emitting layer 211 in the first direction of the light-emitting device 200.

[0043] Wherein, the difference between the length of the first light-emitting layer and the length of the second light-emitting layer and the length of the third light-emitting layer is less than a preset value.

[0044] In this embodiment, in the first direction of the light-emitting unit light-emitting device 200, the difference between the length of the first light-emitting layer and the lengths of the second and third light-emitting layers is 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, or 10%.

[0045] In this embodiment, the first direction of the light-emitting device 200 is the length direction of the light-emitting device 200, that is, the direction M of the row of the micro-light-emitting device display panel 10.

[0046] In this embodiment, the first direction of the light-emitting device 200 is the width direction of the light-emitting device 200, that is, the column direction L of the micro-light-emitting device display panel 10.

[0047] In this embodiment, in the first direction of the light-emitting device 200, the length of the second light-emitting layer 221 is equal to the length of the third light-emitting layer 231.

[0048] In this embodiment, the colors of light emitted by two adjacent light-emitting devices in the row direction M of the micro-light-emitting device display panel 10 are different.

[0049] In this embodiment, the light emitted by two adjacent light-emitting devices in the column direction L of the micro-light-emitting device display panel 10 is of the same color.

[0050] In this embodiment, reference Figure 6 and Figure 7 The red light-emitting device 210 further includes a first horizontal electrode 216, a first transparent electrode layer 212, a first semiconductor layer 213, a second semiconductor layer 214, and a first vertical electrode 215. The first horizontal electrode 216 is electrically connected to the substrate. The first transparent electrode layer 212 is disposed on the side of the first horizontal electrode 216 away from the substrate 100. The first semiconductor layer 213 is disposed on the surface of the first transparent electrode layer 212 away from the substrate 100. The first light-emitting layer 211 is disposed on the surface of the first semiconductor layer 213 away from the substrate 100. The second semiconductor layer 214 is disposed on the surface of the first light-emitting layer 211 away from the substrate 100. One end of the first vertical electrode 215 is electrically connected to the second semiconductor layer 214, and the other end of the first vertical electrode 215 is electrically connected to the substrate 100.

[0051] In this embodiment, reference Figure 8 and Figure 9 The green light-emitting device 220 further includes a second horizontal electrode 226, a second transparent electrode layer 222, a third semiconductor layer 223, a fourth semiconductor layer 224, and a second vertical electrode 225. The second horizontal electrode 226 is electrically connected to the substrate 100. The second transparent electrode layer 222 is disposed on the side of the second horizontal electrode 226 away from the substrate. The third semiconductor layer 223 is disposed on the surface of the second transparent electrode layer 222 away from the substrate 100. The second light-emitting layer 221 is disposed on the surface of the third semiconductor layer 223 away from the substrate 100. The fourth semiconductor layer 224 is disposed on the surface of the second light-emitting layer 221 away from the substrate 100. One end of the second vertical electrode 225 is electrically connected to the fourth semiconductor layer 224, and the other end of the second vertical electrode 225 is electrically connected to the substrate 100.

[0052] In this embodiment, reference Figure 10 and Figure 11The blue light-emitting device 230 further includes a third horizontal electrode 236, a third transparent electrode layer 232, a fifth semiconductor layer 233, a sixth semiconductor layer 234, and a third vertical electrode 235. The third horizontal electrode 236 is electrically connected to the substrate 100. The third transparent electrode layer 232 is disposed on the side of the third horizontal electrode 236 away from the substrate 100. The fifth semiconductor layer 233 is disposed on the surface of the third transparent electrode layer 232 away from the substrate 100. The third light-emitting layer 231 is disposed on the surface of the fifth semiconductor layer 233 away from the substrate 100. The sixth semiconductor layer 234 is disposed on the surface of the third light-emitting layer 231 away from the substrate 100. One end of the third vertical electrode 235 is electrically connected to the sixth semiconductor layer 234, and the other end of the third vertical electrode 235 is electrically connected to the substrate 100.

[0053] In this embodiment, the area of ​​the first vertical electrode 215 is smaller than the area of ​​the second vertical electrode 225 and the area of ​​the third vertical electrode 235.

[0054] In this embodiment, the first horizontal electrode, the second horizontal electrode, and the third horizontal electrode are P electrodes, and the first vertical electrode, the second vertical electrode, and the third vertical electrode are N electrodes.

[0055] In this embodiment, in the first direction of the light-emitting device, the lengths of the red light-emitting device, the green light-emitting device, and the blue light-emitting device are equal, and the dimensions of adjacent microlenses are the same. By setting the lengths of the red light-emitting device, the green light-emitting device, and the blue light-emitting device to be equal, and the dimensions of adjacent microlenses to be the same, in this embodiment, the difference between the length of the first light-emitting layer and the lengths of the second and third light-emitting layers is less than a preset value is not achieved by adjusting the dimensions of the red light-emitting device, the green light-emitting device, and the blue light-emitting device, but by adjusting the first light-emitting device layer of the red light-emitting device. This avoids the problem of adjusting the size of the microlenses caused by adjusting the dimensions of the red light-emitting device, the green light-emitting device, and the blue light-emitting device, thereby reducing the complexity of the fabrication process of the micro-light-emitting device display panel.

[0056] In this embodiment, in the first direction of the light-emitting device, the length of the green light-emitting device 220 is greater than the length of the red light-emitting device 210, and the length of the blue light-emitting device 230 is greater than the length of the red light-emitting device 210. By setting the length of the green light-emitting device 220 to be greater than the length of the red light-emitting device 210, and the length of the blue light-emitting device 230 to be greater than the length of the red light-emitting device 210, the lengths of the red light-emitting device 210, the green light-emitting device 220, and the blue light-emitting device 230 in the first direction of the light-emitting device can be adjusted so that the lengths of the first light-emitting layer 211 of the red light-emitting device 210, the second light-emitting layer 221 of the green light-emitting device 220, and the third light-emitting layer 231 of the blue light-emitting device 230 can be matched.

[0057] In this embodiment, when the microlens is hemispherical, not only will the differences in the first, second, and third light-emitting layers along the first direction of the light-emitting device cause a reddish tint to the white display image of the micro-light-emitting device display panel 10 within a viewing angle range of 18° to 25°, resulting in a color shift problem, but the differences in the lengths of the first, second, and third light-emitting layers along the second direction of the light-emitting device will also cause a reddish tint to the white display image of the micro-light-emitting device display panel 10, resulting in a color shift problem. Therefore, it is further configured that, along the second direction of the light-emitting device, the difference between the length of the first and second light-emitting layers is no greater than 10% of the length of the light-emitting device, and / or the difference between the length of the first and third light-emitting layers is no greater than 10% of the length of the light-emitting device. By setting the length difference between the first and second light-emitting layers in the second direction of the light-emitting device to be no greater than 10% of the length of the light-emitting device, and / or the length difference between the first and third light-emitting layers to be no greater than 10% of the length of the light-emitting device, on the one hand, the brightness difference of the red light-emitting device 210, green light-emitting device 220, and blue light-emitting device 230 under different side viewing angles of the white display screen of the micro-light-emitting device display panel 10 can be reduced, thereby improving the color shift problem of the white display screen of the micro-light-emitting device display panel 10 at side viewing angles. On the other hand, it can avoid the problem of color shift in the micro-light-emitting device display panel 10 at large viewing angles caused by excessive length difference between the second light-emitting layer 221 and the first light-emitting layer 211 in the first direction of the light-emitting device 200, and excessive length difference between the third light-emitting layer 231 and the first light-emitting layer 211 in the first direction of the light-emitting device 200.

[0058] It should be noted that when the first direction of the light-emitting device 200 is the length direction of the light-emitting device 200, that is, the row direction M of the micro-light-emitting device display panel 10, the second direction of the light-emitting device 200 is the width direction of the light-emitting device 200, that is, the column direction L of the micro-light-emitting device display panel 10; when the first direction of the light-emitting device 200 is the width direction of the light-emitting device 200, that is, the column direction L of the micro-light-emitting device display panel 10, the second direction of the light-emitting device 200 is the length direction of the light-emitting device 200, that is, the row direction M of the micro-light-emitting device display panel 10.

[0059] In this embodiment, the material of the first light-emitting layer 211 is different from the material of the second light-emitting layer 221, the material of the first light-emitting layer 211 is different from the material of the third light-emitting layer 231, and the material of the second light-emitting layer 221 is the same as the material of the third light-emitting layer 231.

[0060] In this embodiment, the material of the first light-emitting layer 211 includes gallium arsenide (GaAs), the material of the second light-emitting layer 221 includes gallium nitride (GaN), and the material of the third light-emitting layer 231 includes gallium nitride (GaN).

[0061] In this embodiment, the spacing between any two adjacent red light-emitting devices in the first direction of the light-emitting device is equal, the spacing between any two adjacent green light-emitting devices in the first direction of the light-emitting device is equal, and the spacing between any two adjacent blue light-emitting devices in the first direction of the light-emitting device is equal.

[0062] A second embodiment of this application provides a micro-light-emitting device display panel 10, see reference. Figure 2 , Figure 3 , Figure 5The micro-light-emitting device display panel 10 includes a substrate 100, a plurality of light-emitting devices 200, an encapsulation layer 300, and a microlens layer 400. The light-emitting devices 200 are disposed on the substrate 100, and include a red light-emitting device 210, a green light-emitting device 220, and a blue light-emitting device 230. The red light-emitting device 210, the green light-emitting device 220, and the blue light-emitting device 230 are spaced apart. The red light-emitting device 210 includes a first light-emitting layer 211, the green light-emitting device 220 includes a second light-emitting layer 221, and the blue light-emitting device 230 includes a third light-emitting layer 231. The encapsulation layer 300 is disposed on the substrate 100. On the 0, the encapsulation layer 300 covers the light-emitting device 200; the microlens layer 400 is disposed on the side of the encapsulation layer 300 away from the substrate 100, the microlens layer 400 includes a plurality of microlenses 410, the plurality of microlenses 410 are arranged side by side in the first direction of the light-emitting device; wherein, the microlenses are cylindrical, and the microlenses extend along the second direction of the light-emitting device, each microlens covers a row of light-emitting devices arranged along the second direction of the light-emitting device, and in the first direction of the light-emitting device 200, the difference between the length of the first light-emitting layer and the length of the second light-emitting layer and the length of the third light-emitting layer is less than a preset value.

[0063] By configuring the light-emitting device 200 to include a red light-emitting device 210, a green light-emitting device 220, and a blue light-emitting device 230, with the red light-emitting device 210, the green light-emitting device 220, and the blue light-emitting device 230 spaced apart, the red light-emitting device 210 includes a first light-emitting layer 211, the green light-emitting device 220 includes a second light-emitting layer 221, and the blue light-emitting device 230 includes a third light-emitting layer 231, and in the first direction of the light-emitting device 200, the difference between the length of the first light-emitting layer and the lengths of the second and third light-emitting layers is less than a preset value; thus, in the first direction of the light-emitting device 200, the plurality of microlenses 410 are ensured to be positioned such that... In the direction of arrangement, the length of the second light-emitting layer 221 of the green light-emitting device 220 and the length of the third light-emitting layer 231 of the blue light-emitting device 230 can be matched with the length of the first light-emitting layer 211 of the red light-emitting device 210. This ensures that the brightness of the red light-emitting device 210, the green light-emitting device 220, and the blue light-emitting device 230 is similar at different side viewing angles of the white display screen of the micro-light-emitting device display panel 10, thereby reducing the brightness difference of the red light-emitting device 210, the green light-emitting device 220, and the blue light-emitting device 230 at different side viewing angles of the white display screen of the micro-light-emitting device display panel 10, and thus improving the color shift problem of the white display screen of the micro-light-emitting device display panel 10 at side viewing angles. The difference between the second embodiment and the first embodiment is that, since the microlens is cylindrical, when the microlens is cylindrical, the white display screen of the micro-light-emitting device display panel 10 will be reddish, causing a color shift problem in the white display screen of the micro-light-emitting device display panel 10. This is caused by the difference between the first light-emitting layer, the second light-emitting layer and the third light-emitting layer in the first direction of the light-emitting device. The difference between the first light-emitting layer, the second light-emitting layer and the third light-emitting layer in the second direction of the light-emitting device is not related.

[0064] It should be noted that, in this embodiment, since the microlenses are cylindrical, each microlens covers a row of light-emitting devices arranged along the second direction of the light-emitting device. When the first direction of the light-emitting device is perpendicular to the arrangement direction of the multiple microlenses, setting the difference between the length of the first light-emitting layer and the lengths of the second and third light-emitting layers to be less than a preset value cannot improve the color shift problem of the white display screen of the micro-light-emitting device display panel 10 from the side viewing angle.

[0065] It should be noted that, in the above embodiments, the difference between the length of the first light-emitting layer and the length of the second light-emitting layer and the length of the third light-emitting layer being less than a preset value can be that the difference between the length of the first light-emitting layer 211 and the length of the second light-emitting layer 221 and the third light-emitting layer 231 is 0, that is, the length of the first light-emitting layer 211 is equal to the length of the second light-emitting layer 221 and the third light-emitting layer 231, or the difference between the length of the first light-emitting layer and the length of the second light-emitting layer and the length of the third light-emitting layer is not greater than 10%. Specifically, by setting the difference between the length of the first light-emitting layer and the lengths of the second and third light-emitting layers to be no more than 10% of the length of the light-emitting device, on the one hand, the brightness difference of the red light-emitting device 210, the green light-emitting device 220, and the blue light-emitting device 230 under different side viewing angles of the white display screen of the micro-light-emitting device display panel 10 can be reduced, thereby improving the color shift problem of the white display screen of the micro-light-emitting device display panel 10 under side viewing angles. On the other hand, it can avoid the problem of color shift in the micro-light-emitting device display panel 10 at large viewing angles caused by the excessive length difference between the second light-emitting layer 221 and the first light-emitting layer 211 in the first direction of the light-emitting device 200, and the excessive length difference between the third light-emitting layer 231 and the first light-emitting layer 211 in the first direction of the light-emitting device 200.

[0066] In this embodiment, in the first direction of the light-emitting device 200, the difference between the length of the first light-emitting layer and the lengths of the second and third light-emitting layers is 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, or 10%.

[0067] In this embodiment, the microlens is cylindrical in the second direction of the light-emitting device, and the cross-section of the microlens is semi-circular, with the diameter of the semi-circle aligned with the first direction.

[0068] In this embodiment, the first direction of the light-emitting device 200 is the length direction of the light-emitting device 200, that is, the direction M of the row of the micro-light-emitting device display panel 10.

[0069] In this embodiment, the first direction of the light-emitting device 200 is the width direction of the light-emitting device 200, that is, the column direction L of the micro-light-emitting device display panel 10.

[0070] In this embodiment, the colors of light emitted by two adjacent light-emitting devices in the row direction M of the micro-light-emitting device display panel 10 are different.

[0071] In this embodiment, the light emitted by two adjacent light-emitting devices in the column direction L of the micro-light-emitting device display panel 10 is of the same color.

[0072] In this embodiment, reference Figure 6 and Figure 7 The red light-emitting device 210 further includes a first horizontal electrode, a first transparent electrode layer 212, a first semiconductor layer 213, a second semiconductor layer 214, and a first vertical electrode 215. The first horizontal electrode is electrically connected to the substrate. The first transparent electrode layer 212 is disposed on the side of the first horizontal electrode away from the substrate. The first semiconductor layer 213 is disposed on the surface of the first transparent electrode layer 212 away from the substrate 100. The first light-emitting layer 211 is disposed on the surface of the first semiconductor layer 213 away from the substrate 100. The second semiconductor layer 214 is disposed on the surface of the first light-emitting layer 211 away from the substrate 100. One end of the first vertical electrode 215 is electrically connected to the second semiconductor layer 214, and the other end of the first vertical electrode 215 is electrically connected to the substrate 100.

[0073] In this embodiment, reference Figure 8 and Figure 9 The green light-emitting device 220 further includes a second horizontal electrode, a second transparent electrode layer 222, a third semiconductor layer 223, a fourth semiconductor layer 224, and a second vertical electrode 225. The second horizontal electrode is electrically connected to the substrate. The second transparent electrode layer 222 is disposed on the side of the second horizontal electrode away from the substrate. The third semiconductor layer 223 is disposed on the surface of the second transparent electrode layer 222 away from the substrate 100. The second light-emitting layer 221 is disposed on the surface of the third semiconductor layer 223 away from the substrate 100. The fourth semiconductor layer 224 is disposed on the surface of the second light-emitting layer 221 away from the substrate 100. One end of the second vertical electrode 225 is electrically connected to the fourth semiconductor layer 224, and the other end of the second vertical electrode 225 is electrically connected to the substrate 100.

[0074] In this embodiment, reference Figure 10 and Figure 11 The blue light-emitting device 230 further includes a third horizontal electrode, a third transparent electrode layer 232, a fifth semiconductor layer 233, a sixth semiconductor layer 234, and a third vertical electrode 235. The third horizontal electrode is electrically connected to the substrate. The third transparent electrode layer 232 is disposed on the side of the third horizontal electrode away from the substrate. The fifth semiconductor layer 233 is disposed on the surface of the third transparent electrode layer 232 away from the substrate 100. The third light-emitting layer 231 is disposed on the surface of the fifth semiconductor layer 233 away from the substrate 100. The sixth semiconductor layer 234 is disposed on the surface of the third light-emitting layer 231 away from the substrate 100. One end of the third vertical electrode 235 is electrically connected to the sixth semiconductor layer 234, and the other end of the third vertical electrode 235 is electrically connected to the substrate 100.

[0075] In this embodiment, the area of ​​the first vertical electrode is smaller than the area of ​​the second vertical electrode and the area of ​​the third vertical electrode.

[0076] In this embodiment, the first horizontal electrode, the second horizontal electrode, and the third horizontal electrode are P electrodes, and the first vertical electrode, the second vertical electrode, and the third vertical electrode are N electrodes.

[0077] In this embodiment, in the first direction of the light-emitting device, the lengths of the red light-emitting device, the green light-emitting device, and the blue light-emitting device are equal, and the dimensions of adjacent microlenses are the same. By setting the lengths of the red light-emitting device, the green light-emitting device, and the blue light-emitting device to be equal, and the dimensions of adjacent microlenses to be the same, in this embodiment, the difference between the length of the first light-emitting layer and the lengths of the second and third light-emitting layers is less than a preset value is not achieved by adjusting the dimensions of the red light-emitting device, the green light-emitting device, and the blue light-emitting device, but by adjusting the first light-emitting device layer of the red light-emitting device. This avoids the problem of adjusting the size of the microlenses caused by adjusting the dimensions of the red light-emitting device, the green light-emitting device, and the blue light-emitting device, thereby reducing the complexity of the fabrication process of the micro-light-emitting device display panel.

[0078] In this embodiment, in the first direction of the light-emitting device, the length of the green light-emitting device 220 is greater than the length of the red light-emitting device 210, and the length of the blue light-emitting device 230 is greater than the length of the red light-emitting device 210. By setting the length of the green light-emitting device 220 to be greater than the length of the red light-emitting device 210, and the length of the blue light-emitting device 230 to be greater than the length of the red light-emitting device 210, the lengths of the red light-emitting device 210, the green light-emitting device 220, and the blue light-emitting device 230 in the first direction of the light-emitting device can be adjusted so that the lengths of the first light-emitting layer 211 of the red light-emitting device 210, the second light-emitting layer 221 of the green light-emitting device 220, and the third light-emitting layer 231 of the blue light-emitting device 230 can be matched.

[0079] In this embodiment, the material of the first light-emitting layer 211 is different from the material of the second light-emitting layer 221, the material of the first light-emitting layer 211 is different from the material of the third light-emitting layer 231, and the material of the second light-emitting layer 221 is the same as the material of the third light-emitting layer 231.

[0080] In this embodiment, the material of the first light-emitting layer 211 includes gallium arsenide (GaAs), the material of the second light-emitting layer 221 includes gallium nitride (GaN), and the material of the third light-emitting layer 231 includes gallium nitride (GaN).

[0081] In this embodiment, the spacing between any two adjacent red light-emitting devices in the first direction of the light-emitting device is equal, the spacing between any two adjacent green light-emitting devices in the first direction of the light-emitting device is equal, and the spacing between any two adjacent blue light-emitting devices in the first direction of the light-emitting device is equal.

[0082] The specific embodiments of this application have been described in detail above. The embodiments disclosed above are merely preferred embodiments of this application. Those skilled in the art can make many modifications and improvements without departing from the concept of this application. All such modifications and improvements fall within the scope of protection defined by the claims of this application.

Claims

1. A micro-light-emitting device display panel, characterized in that, include: substrate; Multiple light-emitting devices are disposed on the substrate. The light-emitting devices include red light-emitting devices, green light-emitting devices, and blue light-emitting devices. The red light-emitting devices, green light-emitting devices, and blue light-emitting devices are arranged at intervals. The red light-emitting device includes a first light-emitting layer, the green light-emitting device includes a second light-emitting layer, and the blue light-emitting device includes a third light-emitting layer. An encapsulation layer is disposed on the substrate and covers the light-emitting device; A microlens layer is disposed on the side of the encapsulation layer away from the substrate, and the microlens layer includes a plurality of microlenses; In the first direction of the light-emitting device, the difference between the length of the first light-emitting layer and the lengths of the second and third light-emitting layers is less than a preset value; In the first direction of the light-emitting device, the lengths of the red light-emitting device, the green light-emitting device, and the blue light-emitting device are equal, and the dimensions of two adjacent microlenses are the same. In the second direction of the light-emitting device, the lengths of the red light-emitting device, the green light-emitting device, and the blue light-emitting device are equal. Alternatively, in the first direction of the light-emitting device, the length of the green light-emitting device is greater than the length of the red light-emitting device, and the length of the blue light-emitting device is greater than the length of the red light-emitting device.

2. The micro-light-emitting device display panel according to claim 1, characterized in that, The microlens is hemispherical, and each microlens covers one of the light-emitting devices. The axial direction of the microlens coincides with the direction of the central axis of the corresponding light-emitting device.

3. The micro-light-emitting device display panel according to claim 1, characterized in that, The microlens is cylindrical, and a plurality of the microlenses are arranged side by side in a first direction of the light-emitting device, and the microlenses extend along a second direction of the light-emitting device. Each microlens covers a row of light-emitting devices arranged along the second direction of the light-emitting device.

4. The micro-light-emitting device display panel according to claim 2 or 3, characterized in that, In a first direction of the light-emitting device, the length of the first light-emitting layer is equal to the length of the second light-emitting layer, and / or the length of the first light-emitting layer is equal to the length of the third light-emitting layer.

5. The micro-light-emitting device display panel according to claim 2 or 3, characterized in that, In the first direction of the light-emitting device, the difference between the length of the first light-emitting layer and the length of the second light-emitting layer is no greater than 10% of the length of the light-emitting device, and / or the difference between the length of the first light-emitting layer and the length of the third light-emitting layer is no greater than 10% of the length of the light-emitting device.

6. The micro-light-emitting device display panel according to claim 1, characterized in that, The red light-emitting device further includes a first horizontal electrode, a first transparent electrode layer, a first semiconductor layer, a second semiconductor layer, and a first vertical electrode. The first horizontal electrode is electrically connected to the substrate. The first transparent electrode layer is disposed on the side of the first horizontal electrode away from the substrate. The first semiconductor layer is disposed on the surface of the first transparent electrode layer away from the substrate. The first light-emitting layer is disposed on the surface of the first semiconductor layer away from the substrate. The second semiconductor layer is disposed on the surface of the first light-emitting layer away from the substrate. One end of the first vertical electrode is connected to the second semiconductor layer, and the other end of the first vertical electrode is electrically connected to the substrate. The green light-emitting device further includes a second horizontal electrode, a second transparent electrode layer, a third semiconductor layer, a fourth semiconductor layer, and a second vertical electrode. The second horizontal electrode is electrically connected to the substrate. The second transparent electrode layer is disposed on the side of the second horizontal electrode away from the substrate. The third semiconductor layer is disposed on the surface of the second transparent electrode layer away from the substrate. The second light-emitting layer is disposed on the surface of the third semiconductor layer away from the substrate. The fourth semiconductor layer is disposed on the surface of the second light-emitting layer away from the substrate. One end of the second vertical electrode is connected to the fourth semiconductor layer, and the other end of the second vertical electrode is electrically connected to the substrate. The blue light-emitting device further includes a third horizontal electrode, a third transparent electrode layer, a fifth semiconductor layer, a sixth semiconductor layer, and a third vertical electrode. The third horizontal electrode is electrically connected to the substrate. The third transparent electrode layer is disposed on the side of the third horizontal electrode away from the substrate. The fifth semiconductor layer is disposed on the surface of the third transparent electrode layer away from the substrate. The third light-emitting layer is disposed on the surface of the fifth semiconductor layer away from the substrate. The sixth semiconductor layer is disposed on the surface of the third light-emitting layer away from the substrate. One end of the third vertical electrode is connected to the sixth semiconductor layer, and the other end of the third vertical electrode is electrically connected to the substrate. In the top view of the display panel, the area of ​​the first vertical electrode is smaller than the area of ​​the second vertical electrode and the area of ​​the third vertical electrode.

7. The micro-light-emitting device display panel according to claim 1, characterized in that, The spacing between any two adjacent red light-emitting devices in the first direction of the light-emitting device is equal, the spacing between any two adjacent green light-emitting devices in the first direction of the light-emitting device is equal, and the spacing between any two adjacent blue light-emitting devices in the first direction of the light-emitting device is equal.

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