Micro light emitting device display panel

Abstract

This application discloses a micro-light-emitting device (LED) display panel, including a substrate and a light-emitting device layer disposed on the substrate. The LED layer includes multiple light-emitting devices, each of which includes a first light-emitting unit, a second light-emitting unit, a third light-emitting unit, and a photonic crystal layer. The first light-emitting unit is disposed on the substrate; the second light-emitting unit is disposed on the side of the first light-emitting unit away from the substrate; the third light-emitting unit is disposed on the side of the second light-emitting unit away from the substrate; the photonic crystal layer is disposed on the light-emitting surface of at least one of the first, second, and third light-emitting units, and the photonic crystal layer is used to direct the light emitted by the first, second, or third light-emitting units toward the frontal viewing direction of the LED display panel. Its advantage lies in improving the crosstalk problem in the display quality of the LED display panel.

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] The light emitted from the light-emitting chips in Micro LED display panels exhibits significant stray light over a wide viewing angle, leading to crosstalk in the display image. To mitigate this issue, conventional Micro LED display panels employ high-reflectivity barrier structures between adjacent chips. These barrier structures effectively collect stray light, reducing crosstalk. However, as the resolution of Micro LED display panels increases, the spacing between the chips decreases, making the fabrication of these barrier structures more challenging. This makes it difficult to solve the problem using high-reflectivity barrier structures alone. Therefore, reducing stray light from the light-emitting chips over a wide viewing angle and minimizing crosstalk in Micro LED display panels remains a critical challenge. Summary of the Invention

[0003] The embodiments of this application provide a micro-light-emitting device display panel to improve the crosstalk problem in the display quality of the micro-light-emitting device display panel.

[0004] Embodiments of this application provide a micro-light-emitting device display panel, including a substrate and a light-emitting device layer disposed on the substrate. The light-emitting device layer includes a plurality of light-emitting devices, each of which includes:

[0005] A first light-emitting unit is disposed on the substrate;

[0006] The second light-emitting unit is disposed on the side of the first light-emitting unit away from the substrate;

[0007] The third light-emitting unit is disposed on the side of the second light-emitting unit away from the substrate;

[0008] A photonic crystal layer is disposed on the light-emitting surface of at least one of the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit. The photonic crystal layer is used to direct the light emitted by the first light-emitting unit, the second light-emitting unit, or the third light-emitting unit toward the frontal viewing direction of the micro-light-emitting device display panel.

[0009] Furthermore, the photonic crystal layer includes:

[0010] A first photonic crystal layer is disposed on the light-emitting surface of the first light-emitting unit, and the lattice parameters of the first photonic crystal layer correspond to the wavelength of the light emitted by the first light-emitting unit, so that the light emitted by the first light-emitting unit is emitted in the front viewing direction of the micro-light-emitting device display panel.

[0011] The second photonic crystal layer is disposed on the light-emitting surface of the second light-emitting unit, and the lattice parameters of the second photonic crystal layer correspond to the wavelength of the light emitted by the second light-emitting unit, so that the light emitted by the second light-emitting unit is emitted in the front viewing direction of the micro-light-emitting device display panel.

[0012] The third photonic crystal layer is disposed on the light-emitting surface of the third light-emitting unit, and the lattice parameters of the third photonic crystal layer correspond to the wavelength of the light emitted by the third light-emitting unit, so that the light emitted by the third light-emitting unit is emitted in the front viewing direction of the micro-light-emitting device display panel.

[0013] In the top view of the micro-light-emitting device display panel, the area of ​​the first light-emitting unit is larger than the area of ​​the second light-emitting unit, the area of ​​the second light-emitting unit is larger than the area of ​​the third light-emitting unit, the first photonic crystal layer is located on the first light-emitting unit in a non-overlapping area with the second light-emitting unit, and the second photonic crystal layer is located on the second light-emitting unit in a non-overlapping area with the third light-emitting unit.

[0014] Furthermore, the first photonic crystal layer has a plurality of first openings, the second photonic crystal layer has a plurality of second openings, and the third photonic crystal layer has a plurality of third openings; wherein, the aperture of the first opening corresponds to the wavelength of the light emitted by the first light-emitting unit, the aperture of the second opening corresponds to the wavelength of the light emitted by the second light-emitting unit, and the aperture of the third opening corresponds to the wavelength of the light emitted by the third light-emitting unit.

[0015] Furthermore, the colors of the light emitted by the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit are different, and the aperture of the first opening is not greater than the wavelength of the light emitted by the first light-emitting unit, the aperture of the second opening is not greater than the wavelength of the light emitted by the second light-emitting unit, and the aperture of the third opening is not greater than the wavelength of the light emitted by the third light-emitting unit.

[0016] Furthermore, the light emitted by the first light-emitting unit is red, the light emitted by the second light-emitting unit is green, and the light emitted by the third light-emitting unit is blue. The aperture of the first opening is 620nm to 750nm, the aperture of the second opening is 520nm to 570nm, and the aperture of the third opening is 490nm to 495nm.

[0017] Furthermore, in the top view of the micro-light-emitting device display panel, the first photonic crystal layer is in a grid shape, the second photonic crystal layer is in a grid shape, and the third photonic crystal layer is in a grid shape.

[0018] Furthermore, the first light-emitting unit includes a first reflective layer, a first transparent electrode layer, a first semiconductor layer, a first light-emitting layer, and a second semiconductor layer, which are stacked sequentially.

[0019] The second light-emitting unit includes a second reflective layer, a second transparent electrode layer, a third semiconductor layer, a second light-emitting layer, and a fourth semiconductor layer stacked sequentially.

[0020] The third light-emitting unit includes a third reflective layer, a third transparent electrode layer, a fifth semiconductor layer, a third light-emitting layer, and a sixth semiconductor layer stacked sequentially.

[0021] The first photonic crystal layer is located on the surface of the second semiconductor layer away from the substrate, the second photonic crystal layer is located on the surface of the fourth semiconductor layer away from the substrate, and the third photonic crystal layer is located on the surface of the sixth semiconductor layer away from the substrate.

[0022] Furthermore, the micro-light-emitting device display panel also includes:

[0023] An encapsulation layer is disposed on the substrate and covers the light-emitting device;

[0024] A microlens layer is disposed on the side of the encapsulation layer away from the substrate. The microlens layer includes a plurality of sub-lens portions, each of which corresponds to a light-emitting device, and the focal length of the sub-lens portion is greater than the thickness of the encapsulation layer.

[0025] Furthermore, the first axis passing through the center of the sub-lens portion is perpendicular to the light-emitting plane of the display panel, and the second axis passing through the center of the light-emitting device coincides with the first axis.

[0026] Furthermore, a first axis passing through the center of the sub-lens portion is perpendicular to the light-emitting plane of the display panel, and a second axis passing through the center of the light-emitting device is perpendicular to the light-emitting plane of the display panel, wherein the first axis and the second axis do not coincide.

[0027] The beneficial effects of this application are:

[0028] This application provides a micro-light-emitting device display panel. By setting the micro-light-emitting device display panel to include a photonic crystal layer and disposing the photonic crystal layer on the light-emitting surface of at least one of the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit, the photonic crystal layer can direct the light emitted by the first light-emitting unit, the second light-emitting unit, or the third light-emitting unit toward the frontal viewing direction of the micro-light-emitting device display panel, thereby reducing stray light in the wide viewing angle direction of the light-emitting device of the micro-light-emitting device display panel and improving the crosstalk problem of the display image quality of the micro-light-emitting device display panel. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the first type of micro-light-emitting device display panel of this application;

[0030] Figure 2 yes Figure 1 The optical path diagram of the micro-light-emitting device display panel is shown below;

[0031] Figure 3 This is a schematic diagram of the second type of micro-light-emitting device display panel of this application;

[0032] Figure 4 yes Figure 3 The optical path diagram of the micro-light-emitting device display panel is shown below;

[0033] Figure 5 This is a top view of the light-emitting device of the micro-light-emitting device display panel of this application;

[0034] Figure 6 yes Figure 5 A schematic diagram of the first structure of the light-emitting device in the micro-light-emitting device display panel shown;

[0035] Figure 7 yes Figure 5 A schematic diagram of the second structure of the light-emitting device in the micro-light-emitting device display panel shown;

[0036] Figure 8 yes Figure 5 A schematic diagram of the third structure of the light-emitting device in the micro-light-emitting device display panel shown;

[0037] Figure 9 yes Figure 5 A schematic diagram of the fourth structure of the light-emitting device in the micro-light-emitting device display panel shown;

[0038] Figure 10 yes Figure 5A schematic diagram of the fifth structure of the light-emitting device in the micro-light-emitting device display panel shown;

[0039] Figure 11 This is a schematic diagram of the first photonic crystal layer of the light-emitting device in the micro-light-emitting device display panel of this application;

[0040] Figure 12 This is a schematic diagram of the second photonic crystal layer of the light-emitting device in the micro-light-emitting device display panel of this application;

[0041] Figure 13 This is a schematic diagram of the third photonic crystal layer of the light-emitting device in the micro-light-emitting device display panel of this application.

[0042] 10-Substrate; 20-Light-emitting device layer, light-emitting device; 210-First light-emitting unit; 211-First reflective layer; 212-First transparent electrode layer; 213-First semiconductor layer; 214-First light-emitting layer; 215-Second semiconductor layer; 220-Second light-emitting unit; 221-Second reflective layer; 222-Second transparent electrode layer; 223-Third semiconductor layer; 224-Second light-emitting layer; 225-Fourth semiconductor layer; 230-Third light-emitting unit; 231-Third... Reflective layer, 232-Third transparent electrode layer, 233-Fifth semiconductor layer, 234-Third light-emitting layer, 235-Sixth semiconductor layer, 240-Photonic crystal layer, 241-First photonic crystal layer, 2411-First opening, 242-Second photonic crystal layer, 2421-Second opening, 243-Third photonic crystal layer, 2431-Third opening, 250-First bonding layer, 260-Second bonding layer; 30-Encapsulation layer; 40-Microlens layer, 410-Sub-lens section. Detailed Implementation

[0043] 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.

[0044] 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.

[0045] The first embodiment of this application provides a micro-light-emitting device display panel, see reference. Figures 5-8The micro-light-emitting device display panel includes a substrate 10 and a light-emitting device layer 20 disposed on the substrate 10. The light-emitting device layer 20 includes a plurality of light-emitting devices 20. Each light-emitting device 20 includes a first light-emitting unit 210, a second light-emitting unit 220, a third light-emitting unit 230, and a photonic crystal layer 240. The photonic crystal layer 240 is used to emit the light emitted by the first light-emitting unit 210, the second light-emitting unit 220, or the third light-emitting unit 230 toward the front viewing direction of the micro-light-emitting device display panel.

[0046] Specifically, the first light-emitting unit 210 is disposed on the substrate 10; the second light-emitting unit 220 is disposed on the side of the first light-emitting unit 210 away from the substrate 10; the third light-emitting unit 230 is disposed on the side of the second light-emitting unit 220 away from the substrate 10; the photonic crystal layer 240 includes a first photonic crystal layer 241, which is disposed on the light-emitting surface of the first light-emitting unit 210, the second light-emitting unit 220, or the third light-emitting unit 230, and the lattice parameters of the first photonic crystal layer correspond to the wavelength of the light emitted by the first light-emitting unit, the wavelength of the light emitted by the second light-emitting unit, or the wavelength of the light emitted by the third light-emitting unit. By configuring the micro-light-emitting device display panel to include a first photonic crystal layer 241, and disposing the photonic crystal layer 240 on the light-emitting surface of the first light-emitting unit 210, the second light-emitting unit 220, or the third light-emitting unit 230, the photonic crystal layer 240 can direct the light emitted from the first light-emitting unit 210, the second light-emitting unit 220, or the third light-emitting unit 230 toward the frontal viewing direction of the micro-light-emitting device display panel, thereby reducing stray light in the wide viewing angle direction of the light-emitting device 20 of the micro-light-emitting device display panel and improving the crosstalk problem of the display image quality of the micro-light-emitting device display panel.

[0047] In this embodiment, the viewing direction of the micro-light-emitting device display panel is such that the angle between the light emitted from the first light-emitting unit 210, the light emitted from the second light-emitting unit 220, or the light emitted from the third light-emitting unit 230 and the direction perpendicular to the light-emitting plane of the micro-light-emitting device display panel is no greater than 10°.

[0048] In this embodiment, in the top view of the micro-light-emitting device display panel, the area of ​​the first light-emitting unit 210 is larger than the area of ​​the second light-emitting unit 220, the area of ​​the second light-emitting unit 220 is larger than the area of ​​the first light-emitting unit 210, the first photonic crystal layer 241 is located on the first light-emitting unit 210 in a non-overlapping area with the second light-emitting unit 220, and the second photonic crystal layer 242 is located on the second light-emitting unit 220 in a non-overlapping area with the third light-emitting unit 230.

[0049] It should be noted that the lattice parameters of the photonic crystal layer include the aperture of the aperture, the spacing between two adjacent apertures, and the depth of the aperture.

[0050] In this embodiment, reference Figure 6 The first photonic crystal layer 241 is located on the light-emitting surface of the first light-emitting unit 210. The first photonic crystal layer has a plurality of first openings 2411, the aperture of which corresponds to the wavelength of the light emitted by the first light-emitting unit 210. By setting the first photonic crystal layer 241 on the light-emitting surface of the first light-emitting unit 210, and the aperture d1 of the first openings 2411 corresponding to the wavelength of the light emitted by the first light-emitting unit 210, the photonic crystal layer 241 can direct the light emitted by the first light-emitting unit 210 toward the frontal viewing direction of the micro-light-emitting device display panel, thereby reducing stray light in the wide viewing angle direction of the light-emitting device 20 of the micro-light-emitting device display panel and improving the crosstalk problem of the display image quality of the micro-light-emitting device display panel.

[0051] In this embodiment, reference Figure 7 The first photonic crystal layer 241 is located on the light-emitting surface of the second light-emitting unit 220. The first photonic crystal layer has a plurality of first openings 2411, and the aperture d1 of the first opening 2411 corresponds to the wavelength of the light emitted by the second light-emitting unit 220. By setting the first photonic crystal layer 241 on the light-emitting surface of the second light-emitting unit 220, and the aperture d1 of the first opening 2411 corresponding to the wavelength of the light emitted by the second light-emitting unit 220, the photonic crystal layer 241 can direct the light emitted by the second light-emitting unit 220 toward the frontal viewing direction of the micro-light-emitting device display panel, thereby reducing stray light in the wide viewing angle direction of the light-emitting device 20 of the micro-light-emitting device display panel and improving the crosstalk problem of the display image quality of the micro-light-emitting device display panel.

[0052] In this embodiment, reference Figure 8 The first photonic crystal layer 241 is located on the light-emitting surface of the third light-emitting unit 230. The first photonic crystal layer has a plurality of first openings 2411, and the aperture d1 of the first opening 2411 corresponds to the wavelength of the light emitted by the third light-emitting unit 230. By setting the first photonic crystal layer 241 on the light-emitting surface of the third light-emitting unit 230, and the aperture d1 of the first opening 2411 corresponding to the wavelength of the light emitted by the third light-emitting unit 230, the photonic crystal layer 241 can direct the light emitted by the third light-emitting unit 230 toward the frontal viewing direction of the micro-light-emitting device display panel, thereby reducing stray light in the wide viewing angle direction of the light-emitting device 20 of the micro-light-emitting device display panel and improving the crosstalk problem of the display image quality of the micro-light-emitting device display panel.

[0053] In this embodiment, in the top view of the micro-light-emitting device display panel, the first photonic crystal layer 241 is in the form of a grid.

[0054] In this embodiment, in the top view of the micro-light-emitting device display panel, the area of ​​the first light-emitting unit 210 is larger than the area of ​​the second light-emitting unit 220, the area of ​​the second light-emitting unit 220 is larger than the area of ​​the first light-emitting unit 210, and the first photonic crystal layer 241 is located in the non-overlapping area of ​​the first light-emitting unit 210 with the second light-emitting unit 220 or the non-overlapping area of ​​the second light-emitting unit 220 with the third light-emitting unit 230.

[0055] In this embodiment, the light emitted by the first light-emitting unit 210 is red, the light emitted by the second light-emitting unit 220 is green, and the light emitted by the third light-emitting unit 230 is blue. The aperture d1 of the first opening 2411 is 620nm~750nm, 520nm~570nm, or 490nm~495nm.

[0056] In this embodiment, reference Figures 1-5 The micro-light-emitting device display panel further includes an encapsulation layer 30 and a microlens layer 40. The encapsulation layer 30 is disposed on the substrate 10 and covers the light-emitting device 20. The microlens layer 40 is disposed on the side of the encapsulation layer 30 away from the substrate 10, and the microlens layer 40 includes a plurality of sub-lens portions 410, each sub-lens portion 410 corresponding to one light-emitting device 20. By setting the microlens layer 40 to include a plurality of sub-lens portions 410, each sub-lens portion 410 corresponding to one light-emitting device 20, the sub-lens portions 410 can converge the light from the light-emitting device 20, preventing the light from the light of the light-emitting device 20 from entering adjacent sub-lens portions 410, thereby reducing the interference of light from adjacent light-emitting devices 20, and further improving the problem of crosstalk in display quality caused by stray light in the display screen of the micro-light-emitting device display panel.

[0057] In this embodiment, reference Figure 2 and Figure 3A first axis L passing through the center of the sub-lens portion 410 coincides with a second axis M passing through the center of the light-emitting device 20. The first axis L extends in the same direction as the light emission direction of the micro-light-emitting device display panel, and the second axis M extends in the same direction as the light emission direction of the micro-light-emitting device display panel. By aligning the first axis L through the center of the sub-lens portion 410 with the second axis M through the center of the light-emitting device 20, and ensuring that the light emitted by both axes is directed in the same direction, the light from the light-emitting device 20 can converge towards the center, thereby improving the luminous brightness of the micro-light-emitting device display panel in the forward viewing angle direction.

[0058] In this embodiment, reference Figure 4 and Figure 5 The first axis L passing through the center of the sub-lens portion 410 and the second axis M passing through the center of the light-emitting device 20 do not coincide. The extension direction of the first axis L is the same as the light emission direction of the micro-light-emitting device display panel, and the extension direction of the second axis M is the same as the light emission direction of the micro-light-emitting device display panel. By setting the first axis L passing through the center of the sub-lens portion 410 and the second axis M passing through the center of the light-emitting device 20 to not coincide, and the extension direction of the first axis L is the same as the light emission direction of the micro-light-emitting device display panel, and the extension direction of the second axis M is the same as the light emission direction of the micro-light-emitting device display panel, the light from the light-emitting device 20 can be concentrated towards one side, thereby improving the luminous brightness of the micro-light-emitting device display panel at a certain viewing angle.

[0059] In this embodiment, the lattice parameters of the first photonic crystal layer include the aperture of the first aperture, the spacing between two adjacent first apertures, and the depth of the first aperture.

[0060] The second embodiment of this application provides a second type of micro-light-emitting device display panel, see reference. Figure 5 and Figure 9The second embodiment is similar to the first embodiment, except that the photonic crystal layer 240 includes a first photonic crystal layer 241 and a second photonic crystal layer 242. The first photonic crystal layer 241 is located on the light-emitting surface of one of the first light-emitting unit 210, the second light-emitting unit 220, or the third light-emitting unit 230. The second photonic crystal layer 242 is located on the light-emitting surface of the other two of the first light-emitting unit 210, the second light-emitting unit 220, or the third light-emitting unit 230. The lattice parameter of the first photonic crystal layer corresponds to the wavelength of the light emitted by the first light-emitting unit, the second light-emitting unit, or the third light-emitting unit. The lattice parameter of the second photonic crystal layer corresponds to the wavelength of the light emitted by the first light-emitting unit 210, the second light-emitting unit 220, or the third light-emitting unit 230.

[0061] It should be noted that the lattice parameters of the photonic crystal layer include the aperture of the aperture, the spacing between two adjacent apertures, and the depth of the aperture.

[0062] In this embodiment, the first photonic crystal layer 241 is located on the light-emitting surface of the first light-emitting unit 210, and the second photonic crystal layer 242 is located on the light-emitting surface of the second light-emitting unit 220. The first photonic crystal layer has a plurality of first openings 2411, and the second photonic crystal layer has a plurality of second openings 2421. The aperture d1 of the first opening 2411 corresponds to the wavelength of the light emitted by the first light-emitting unit 210, and the aperture d2 of the second opening 2421 corresponds to the wavelength of the light emitted by the second light-emitting unit 220. By configuring the micro-light-emitting device display panel to include a first photonic crystal layer 241 and a second photonic crystal layer 242, with the first photonic crystal layer 241 disposed on the light-emitting surface of the first light-emitting unit 210 and the second photonic crystal layer 242 disposed on the light-emitting surface of the second light-emitting unit 220, and the aperture d1 of the first aperture 2411 corresponding to the wavelength of the light emitted from the first light-emitting unit 210 and the aperture d1 of the first aperture 2411 corresponding to the wavelength of the light emitted from the second light-emitting unit 220, the first photonic crystal layer 241 can direct the light emitted from the first light-emitting unit 210 toward the front viewing direction of the micro-light-emitting device display panel, and the second photonic crystal layer 242 can direct the light emitted from the second light-emitting unit 220 toward the front viewing direction of the micro-light-emitting device display panel, thereby reducing stray light in the wide viewing angle direction of the light-emitting device 20 of the micro-light-emitting device display panel and improving the crosstalk problem of the display image quality of the micro-light-emitting device display panel.

[0063] In this embodiment, the first photonic crystal layer 241 is located on the light-emitting surface of the first light-emitting unit 210, and the second photonic crystal layer 242 is located on the light-emitting surface of the third light-emitting unit 230. The first photonic crystal layer has a plurality of first openings 2411, and the second photonic crystal layer has a plurality of second openings 2421. The aperture d1 of the first opening 2411 corresponds to the wavelength of the light emitted by the first light-emitting unit 210, and the aperture d2 of the second opening 2421 corresponds to the wavelength of the light emitted by the third light-emitting unit 230. By disposing a first photonic crystal layer 241 on the light-emitting surface of the first light-emitting unit 210 and a second photonic crystal layer 242 on the light-emitting surface of the third light-emitting unit 230, with the aperture d1 of the first aperture 2411 corresponding to the wavelength of the light emitted from the first light-emitting unit 210 and the aperture d2 of the second aperture 2421 corresponding to the wavelength of the light emitted from the third light-emitting unit 230, the first photonic crystal layer 241 can direct the light emitted from the first light-emitting unit 210 toward the frontal viewing direction of the micro-light-emitting device display panel, and the second photonic crystal layer 242 can direct the light emitted from the third light-emitting unit 230 toward the frontal viewing direction of the micro-light-emitting device display panel. This reduces stray light in the wide viewing angle direction of the light-emitting device 20 of the micro-light-emitting device display panel and improves the crosstalk problem in the display quality of the micro-light-emitting device display panel.

[0064] In this embodiment, the first photonic crystal layer 241 is located on the light-emitting surface of the third light-emitting unit 230, and the second photonic crystal layer 242 is located on the light-emitting surface of the second light-emitting unit 220. The first photonic crystal layer has a plurality of first openings 2411, and the second photonic crystal layer has a plurality of second openings 2421. The aperture d1 of the first opening 2411 corresponds to the wavelength of the light emitted by the third light-emitting unit 230, and the aperture d2 of the second opening 2421 corresponds to the wavelength of the light emitted by the second light-emitting unit 220. By disposing the first photonic crystal layer 241 on the light-emitting surface of the third light-emitting unit 230 and the second photonic crystal layer 242 on the light-emitting surface of the second light-emitting unit 220, the aperture d1 of the first aperture 2411 corresponds to the wavelength of the light emitted from the first light-emitting unit 210, and the aperture d2 of the second aperture 2421 corresponds to the wavelength of the light emitted from the third light-emitting unit 230. This allows the first photonic crystal layer 241 to direct the light emitted from the third light-emitting unit 230 toward the frontal viewing direction of the micro-light-emitting device display panel, and the second photonic crystal layer 242 to direct the light emitted from the second light-emitting unit 220 toward the frontal viewing direction of the micro-light-emitting device display panel. This reduces stray light in the wide viewing angle direction of the light-emitting device 20 of the micro-light-emitting device display panel and improves the crosstalk problem in the display quality of the micro-light-emitting device display panel.

[0065] In this embodiment, in the top view of the micro-light-emitting device display panel, the area of ​​the first light-emitting unit 210 is larger than the area of ​​the second light-emitting unit 220, the area of ​​the second light-emitting unit 220 is larger than the area of ​​the first light-emitting unit 210, and the first photonic crystal layer 241 is located on the first light-emitting unit 210 in a non-overlapping area with the second light-emitting unit 220, or the first photonic crystal layer 241 is located on the second light-emitting unit 220 in a non-overlapping area with the third light-emitting unit 230.

[0066] In this embodiment, the light emitted by the first light-emitting unit 210 is red, the light emitted by the second light-emitting unit 220 is green, and the light emitted by the third light-emitting unit 230 is blue. The aperture d1 of the first opening 2411 is 620nm~750nm, 520nm~570nm, or 490nm~495nm.

[0067] In this embodiment, in the top view of the micro-light-emitting device display panel, the first photonic crystal layer 241 is in a grid shape, the second photonic crystal layer 242 is in a grid shape, and the third photonic crystal layer 243 is in a grid shape.

[0068] In this embodiment, the micro-light-emitting device display panel further includes an encapsulation layer 30 and a microlens layer 40. The encapsulation layer 30 is disposed on the substrate 10 and covers the light-emitting device 20. The microlens layer 40 is disposed on the side of the encapsulation layer 30 away from the substrate 10, and the microlens layer 40 includes a plurality of sub-lens portions 410, each of which corresponds to one light-emitting device 20. By configuring the microlens layer 40 to include a plurality of sub-lens portions 410, each of which corresponds to one light-emitting device 20, the sub-lens portions 410 can converge the light from the light-emitting device 20, preventing the light from the light of the light-emitting device 20 from entering adjacent sub-lens portions 410, thereby reducing the interference of light from adjacent light-emitting devices 20 and further improving the problem of crosstalk in display image quality caused by stray light in the display screen of the micro-light-emitting device display panel.

[0069] In this embodiment, reference Figure 2 and Figure 3A first axis L passing through the center of the sub-lens portion 410 coincides with a second axis M passing through the center of the light-emitting device 20. The first axis L extends in the same direction as the light emission direction of the micro-light-emitting device display panel, and the second axis M extends in the same direction as the light emission direction of the micro-light-emitting device display panel. By aligning the first axis L through the center of the sub-lens portion 410 with the second axis M through the center of the light-emitting device 20, and ensuring that the light emitted by both axes is directed in the same direction, the light from the light-emitting device 20 can converge towards the center, thereby improving the luminous brightness of the micro-light-emitting device display panel in the forward viewing angle direction.

[0070] In this embodiment, reference Figure 4 and Figure 5 The first axis L passing through the center of the sub-lens portion 410 and the second axis M passing through the center of the light-emitting device 20 do not coincide. The extension direction of the first axis L is the same as the light emission direction of the micro-light-emitting device display panel, and the extension direction of the second axis M is the same as the light emission direction of the micro-light-emitting device display panel. By setting the first axis L passing through the center of the sub-lens portion 410 and the second axis M passing through the center of the light-emitting device 20 to not coincide, and the extension direction of the first axis L is the same as the light emission direction of the micro-light-emitting device display panel, and the extension direction of the second axis M is the same as the light emission direction of the micro-light-emitting device display panel, the light from the light-emitting device 20 can be concentrated towards one side, thereby improving the luminous brightness of the micro-light-emitting device display panel at a certain viewing angle. A third embodiment of this application provides a micro-light-emitting device display panel, see reference... Figure 5 and reference Figure 10 The second embodiment is similar to the first embodiment, except that the photonic crystal layer 240 includes a first photonic crystal layer 241, a second photonic crystal layer 242, and a third photonic crystal layer 243. The first photonic crystal layer 241 is disposed on the light-emitting surface of the first light-emitting unit 210, the second photonic crystal layer 242 is disposed on the light-emitting surface of the second light-emitting unit 220, and the third photonic crystal layer 243 is disposed on the light-emitting surface of the third light-emitting unit 230. The lattice parameters of the first photonic crystal layer correspond to the wavelength of the light emitted by the first light-emitting unit, the lattice parameters of the second photonic crystal layer correspond to the wavelength of the light emitted by the second light-emitting unit, and the lattice parameters of the third photonic crystal layer correspond to the wavelength of the light emitted by the third light-emitting unit.

[0071] By setting the first photonic crystal layer 241 on the light-emitting surface of the first light-emitting unit 210, the second photonic crystal layer 242 on the light-emitting surface of the second light-emitting unit 220, and the third photonic crystal layer 243 on the light-emitting surface of the third light-emitting unit 230, with the lattice parameters of the first photonic crystal layer corresponding to the wavelength of the light emitted by the first light-emitting unit, the lattice parameters of the second photonic crystal layer corresponding to the wavelength of the light emitted by the second light-emitting unit, and the lattice parameters of the third photonic crystal layer corresponding to the wavelength of the light emitted by the third light-emitting unit, the light emitted by the first light-emitting unit is directed towards the front viewing direction of the micro-light-emitting device display panel, the light emitted by the second light-emitting unit is directed towards the front viewing direction of the micro-light-emitting device display panel, and the light emitted by the third light-emitting unit is directed towards the front viewing direction of the micro-light-emitting device display panel, thereby reducing stray light in the wide viewing angle direction of the light-emitting device 20 of the micro-light-emitting device display panel and improving the crosstalk problem of the display image quality of the micro-light-emitting device display panel.

[0072] It should be noted that the lattice parameters of the photonic crystal layer include the aperture of the aperture, the spacing between two adjacent apertures, and the depth of the aperture.

[0073] In this embodiment, the first photonic crystal layer has a plurality of first openings 2411; the second photonic crystal layer has a plurality of second openings 2421; and the third photonic crystal layer has a plurality of third openings 2431. The aperture d1 of the first opening 2411 corresponds to the wavelength of the light emitted by the first light-emitting unit 210, the aperture d2 of the second opening 2421 corresponds to the wavelength of the light emitted by the second light-emitting unit 220, and the aperture d3 of the third opening 2431 corresponds to the wavelength of the light emitted by the third light-emitting unit 230. By disposing a first photonic crystal layer 241 on the light-emitting surface of the first light-emitting unit 210, a second photonic crystal layer 242 on the light-emitting surface of the second light-emitting unit 220, and a third photonic crystal layer 243 on the light-emitting surface of the third light-emitting unit 230, the aperture d1 of the first opening 2411 corresponds to the wavelength of the light emitted from the first light-emitting unit 210, the aperture d2 of the second opening 2421 corresponds to the wavelength of the light emitted from the second light-emitting unit 220, and the aperture d3 of the third opening 2431 corresponds to the wavelength of the light emitted from the second light-emitting unit 220, such that... The first photonic crystal layer 241 directs the light emitted from the first light-emitting unit 210 toward the frontal viewing direction of the micro-light-emitting device display panel. The second photonic crystal layer 242 directs the light emitted from the second light-emitting unit 220 toward the frontal viewing direction of the micro-light-emitting device display panel. The third photonic crystal layer 243 directs the light emitted from the third light-emitting unit 230 toward the frontal viewing direction of the micro-light-emitting device display panel, thereby reducing stray light in the wide viewing angle direction of the light-emitting device 20 of the micro-light-emitting device display panel and improving the crosstalk problem of the display image quality of the micro-light-emitting device display panel. In this embodiment, in the top view of the micro-light-emitting device display panel, the area of ​​the first light-emitting unit 210 is larger than the area of ​​the second light-emitting unit 220, the area of ​​the second light-emitting unit 220 is larger than the area of ​​the first light-emitting unit 210, the first photonic crystal layer 241 is located on the first light-emitting unit 210 in a non-overlapping area with the second light-emitting unit 220, and the second photonic crystal layer 242 is located on the second light-emitting unit 220 in a non-overlapping area with the third light-emitting unit 230.By setting the area of ​​the first light-emitting unit 210 to be larger than the area of ​​the second light-emitting unit 220, and the area of ​​the second light-emitting unit 220 to be larger than the area of ​​the first light-emitting unit 210, a vertically stacked method of unequal-sized light-emitting units is adopted. This allows the first photonic crystal layer 241 to be disposed on the first light-emitting unit 210 in a non-overlapping area with the second light-emitting unit 220, and the second photonic crystal layer 242 to be disposed on the second light-emitting unit 220 in a non-overlapping area with the third light-emitting unit 230. This ensures that the first photonic crystal layer 241 can effectively control the light emitted from the first light-emitting unit 210 to be collimated from the light-emitting surface of the micro-light-emitting device display panel, and the second photonic crystal layer 242 can effectively control the light emitted from the second light-emitting unit 220 to be collimated from the light-emitting surface of the micro-light-emitting device display panel.

[0074] In this embodiment, the colors of the light emitted by the first light-emitting unit 210, the second light-emitting unit 220, and the third light-emitting unit 230 are different, and the aperture d1 of the first opening 2411 is not greater than the wavelength of the light emitted by the first light-emitting unit 210, the aperture d2 of the second opening 2421 is not greater than the wavelength of the light emitted by the second light-emitting unit 220, and the aperture d3 of the third opening 2431 is not greater than the wavelength of the light emitted by the third light-emitting unit 230. By setting the colors of the light emitted by the first light-emitting unit 210, the second light-emitting unit 220, and the third light-emitting unit 230 to be different, and by ensuring that the aperture d1 of the first opening 2411 is not greater than the wavelength of the light emitted by the first light-emitting unit 210, the aperture d2 of the second opening 2421 is not greater than the wavelength of the light emitted by the second light-emitting unit 220, and the aperture d3 of the third opening 2431 is not greater than the wavelength of the light emitted by the third light-emitting unit 230, each light-emitting device... The 20 can have three different colored light-emitting areas, and the aperture d1 of the first aperture 2411 is not greater than the wavelength of the light emitted by the first light-emitting unit 210, the aperture d2 of the second aperture 2421 is not greater than the wavelength of the light emitted by the second light-emitting unit 220, and the aperture d3 of the third aperture 2431 is not greater than the wavelength of the light emitted by the third light-emitting unit 230. This can avoid the reduction of the light efficiency of the micro-light-emitting device display panel due to the excessive width of the first aperture 2411, the second aperture 2421, and the third aperture 2431.

[0075] In this embodiment, reference Figures 11-13The first light-emitting unit 210 emits red light, the second light-emitting unit 220 emits green light, and the third light-emitting unit 230 emits blue light. The aperture d1 of the first aperture 2411 is 620nm to 750nm, the aperture d2 of the second aperture 2421 is 520nm to 570nm, and the aperture d3 of the third aperture 2431 is 490nm to 495nm. By setting the color of the light emitted by the first light-emitting unit 210 to red, the color of the light emitted by the second light-emitting unit 220 to green, and the color of the light emitted by the third light-emitting unit 230 to blue, and setting the aperture d1 of the first aperture 2411 to 620nm~750nm, the aperture d2 of the second aperture 2421 to 520nm~570nm, and the aperture d3 of the third aperture 2431 to 490nm~495nm, the red light from the first light-emitting unit 210 can be emitted in the collimated direction of the micro-light-emitting device display panel under the action of the first photonic crystal layer 241, the green light from the second light-emitting unit 220 can be emitted in the collimated direction of the micro-light-emitting device display panel under the action of the second photonic crystal layer 242, and the blue light from the third light-emitting unit 230 can be emitted in the collimated direction of the micro-light-emitting device display panel under the action of the first photonic crystal layer 241.

[0076] In this embodiment, in the top view of the micro-light-emitting device display panel, the first photonic crystal layer 241 is in a grid shape, the second photonic crystal layer 242 is in a grid shape, and the third photonic crystal layer 243 is in a grid shape.

[0077] In this embodiment, the micro-light-emitting device display panel further includes an encapsulation layer 30 and a microlens layer 40. The encapsulation layer 30 is disposed on the substrate 10 and covers the light-emitting device 20. The microlens layer 40 is disposed on the side of the encapsulation layer 30 away from the substrate 10, and the microlens layer 40 includes a plurality of sub-lens portions 410, each of which corresponds to one light-emitting device 20. By configuring the microlens layer 40 to include a plurality of sub-lens portions 410, each of which corresponds to one light-emitting device 20, the sub-lens portions 410 can converge the light from the light-emitting device 20, preventing the light from the light of the light-emitting device 20 from entering adjacent sub-lens portions 410, thereby reducing the interference of light from adjacent light-emitting devices 20 and further improving the problem of crosstalk in display image quality caused by stray light in the display screen of the micro-light-emitting device display panel.

[0078] In this embodiment, reference Figure 2 and Figure 3A first axis L passing through the center of the sub-lens portion 410 coincides with a second axis M passing through the center of the light-emitting device 20. The first axis L extends in the same direction as the light emission direction of the micro-light-emitting device display panel, and the second axis M extends in the same direction as the light emission direction of the micro-light-emitting device display panel. By aligning the first axis L through the center of the sub-lens portion 410 with the second axis M through the center of the light-emitting device 20, and ensuring that the light emitted by both axes is directed in the same direction, the light from the light-emitting device 20 can converge towards the center, thereby improving the luminous brightness of the micro-light-emitting device display panel in the forward viewing angle direction.

[0079] In this embodiment, reference Figure 4 and Figure 5 The first axis L passing through the center of the sub-lens portion 410 and the second axis M passing through the center of the light-emitting device 20 do not coincide. The extension direction of the first axis L is the same as the light emission direction of the micro-light-emitting device display panel, and the extension direction of the second axis M is the same as the light emission direction of the micro-light-emitting device display panel. By setting the first axis L passing through the center of the sub-lens portion 410 and the second axis M passing through the center of the light-emitting device 20 to not coincide, and the extension direction of the first axis L is the same as the light emission direction of the micro-light-emitting device display panel, and the extension direction of the second axis M is the same as the light emission direction of the micro-light-emitting device display panel, the light from the light-emitting device 20 can be concentrated towards one side, thereby improving the luminous brightness of the micro-light-emitting device display panel at a certain viewing angle.

[0080] In this embodiment, the first light-emitting unit 210 includes a first reflective layer 211, a first transparent electrode layer 212, a first semiconductor layer 213, a first light-emitting layer 214, and a second semiconductor layer 215 stacked sequentially; the second light-emitting unit 220 includes a second reflective layer 221, a second transparent electrode layer 222, a third semiconductor layer 223, a second light-emitting layer 224, and a fourth semiconductor layer 225 stacked sequentially; the fourth light-emitting unit includes a third reflective layer 231, a third transparent electrode layer 232, a fifth semiconductor layer 233, a third light-emitting layer 234, and a sixth semiconductor layer 235 stacked sequentially; wherein, the first photonic crystal layer 241 is located on the surface of the second semiconductor layer 215 away from the substrate 10, the second photonic crystal layer 242 is located on the surface of the fourth semiconductor layer 225 away from the substrate 10, and the third photonic crystal layer 243 is located on the surface of the sixth semiconductor layer 235 away from the substrate 10. By setting a first reflective layer 211, a second reflective layer 221, and a third reflective layer 231, the first reflective layer 211 can direct some of the downward-facing light emitted by the first light-emitting layer 214 toward the light-emitting surface of the micro-light-emitting device display panel; the second reflective layer 221 can direct some of the downward-facing light emitted by the second light-emitting layer 224 toward the light-emitting surface of the micro-light-emitting device display panel; and the third reflective layer 231 can direct some of the downward-facing light emitted by the third light-emitting layer 234 toward the light-emitting surface of the micro-light-emitting device display panel, thereby improving the light efficiency of the micro-light-emitting device display panel.

[0081] In this embodiment, the micro-light-emitting device display panel further includes a first bonding layer 250 and a second bonding layer 260. The second light-emitting unit 220 is connected to the first light-emitting unit 210 through the first bonding layer 250, and the third light-emitting unit 230 is connected to the second light-emitting unit 220 through the second bonding layer 260.

[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, The system includes a substrate and a light-emitting device layer disposed on the substrate. The light-emitting device layer includes a plurality of light-emitting devices, each of which includes: A first light-emitting unit is disposed on the substrate; The second light-emitting unit is disposed on the side of the first light-emitting unit away from the substrate; The third light-emitting unit is disposed on the side of the second light-emitting unit away from the substrate; A photonic crystal layer is disposed on the light-emitting surface of at least one of the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit. The photonic crystal layer is used to direct the light emitted by the first light-emitting unit, the second light-emitting unit, or the third light-emitting unit toward the front viewing direction of the micro-light-emitting device display panel. The photonic crystal layer includes: A first photonic crystal layer is disposed on the light-emitting surface of the first light-emitting unit, and the lattice parameters of the first photonic crystal layer correspond to the wavelength of the light emitted by the first light-emitting unit, so that the light emitted by the first light-emitting unit is emitted in the front viewing direction of the micro-light-emitting device display panel. The second photonic crystal layer is disposed on the light-emitting surface of the second light-emitting unit, and the lattice parameters of the second photonic crystal layer correspond to the wavelength of the light emitted by the second light-emitting unit, so that the light emitted by the second light-emitting unit is emitted in the front viewing direction of the micro-light-emitting device display panel. The third photonic crystal layer is disposed on the light-emitting surface of the third light-emitting unit, and the lattice parameters of the third photonic crystal layer correspond to the wavelength of the light emitted by the third light-emitting unit, so that the light emitted by the third light-emitting unit is emitted in the front viewing direction of the micro-light-emitting device display panel. In the top view of the micro-light-emitting device display panel, the first photonic crystal layer does not overlap with the second light-emitting unit, and the second photonic crystal layer does not overlap with the third light-emitting unit.

2. The micro-light-emitting device display panel according to claim 1, characterized in that, The area of ​​the first light-emitting unit is larger than the area of ​​the second light-emitting unit, and the area of ​​the second light-emitting unit is larger than the area of ​​the third light-emitting unit.

3. The micro-light-emitting device display panel according to claim 2, characterized in that, The first photonic crystal layer has a plurality of first openings, the second photonic crystal layer has a plurality of second openings, and the third photonic crystal layer has a plurality of third openings; wherein, the aperture of the first opening corresponds to the wavelength of the light emitted by the first light-emitting unit, the aperture of the second opening corresponds to the wavelength of the light emitted by the second light-emitting unit, and the aperture of the third opening corresponds to the wavelength of the light emitted by the third light-emitting unit.

4. The micro-light-emitting device display panel according to claim 3, characterized in that, The colors of the light emitted by the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit are different, and the aperture of the first opening is not greater than the wavelength of the light emitted by the first light-emitting unit, the aperture of the second opening is not greater than the wavelength of the light emitted by the second light-emitting unit, and the aperture of the third opening is not greater than the wavelength of the light emitted by the third light-emitting unit.

5. The micro-light-emitting device display panel according to claim 4, characterized in that, The first light-emitting unit emits red light, the second light-emitting unit emits green light, and the third light-emitting unit emits blue light. The aperture of the first opening is 620nm to 750nm, the aperture of the second opening is 520nm to 570nm, and the aperture of the third opening is 490nm to 495nm.

6. The micro-light-emitting device display panel according to claim 3, characterized in that, In a top view of the micro-light-emitting device display panel, the first photonic crystal layer is in a grid shape, the second photonic crystal layer is in a grid shape, and the third photonic crystal layer is in a grid shape.

7. The micro-light-emitting device display panel according to claim 2, characterized in that, The first light-emitting unit includes a first reflective layer, a first transparent electrode layer, a first semiconductor layer, a first light-emitting layer, and a second semiconductor layer, which are stacked sequentially. The second light-emitting unit includes a second reflective layer, a second transparent electrode layer, a third semiconductor layer, a second light-emitting layer, and a fourth semiconductor layer stacked sequentially. The third light-emitting unit includes a third reflective layer, a third transparent electrode layer, a fifth semiconductor layer, a third light-emitting layer, and a sixth semiconductor layer stacked sequentially. The first photonic crystal layer is located on the surface of the second semiconductor layer away from the substrate, the second photonic crystal layer is located on the surface of the fourth semiconductor layer away from the substrate, and the third photonic crystal layer is located on the surface of the sixth semiconductor layer away from the substrate.

8. The micro-light-emitting device display panel according to claim 1, characterized in that, The micro-light-emitting device display panel also includes: 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. The microlens layer includes a plurality of sub-lens portions, each of which corresponds to a light-emitting device, and the focal length of the sub-lens portion is greater than the thickness of the encapsulation layer.

9. The micro-light-emitting device display panel according to claim 8, characterized in that, A first axis passing through the center of the sub-lens portion is perpendicular to the light-emitting plane of the display panel, and a second axis passing through the center of the light-emitting device coincides with the first axis.

10. The micro-light-emitting device display panel according to claim 8, characterized in that, A first axis passing through the center of the sub-lens portion is perpendicular to the light-emitting plane of the display panel, and a second axis passing through the center of the light-emitting device is perpendicular to the light-emitting plane of the display panel, wherein the first axis and the second axis do not coincide.

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