Micro light-emitting device display panel

Abstract

The invention discloses a micro light-emitting device display panel which comprises a substrate and a light-emitting device layer arranged on the substrate, the light-emitting device layer comprises a plurality of light-emitting devices, each light-emitting device comprises a first light-emitting unit, a second light-emitting unit, a third light-emitting unit and a photonic crystal layer, and the first light-emitting unit is arranged on the substrate; the second light-emitting unit is arranged on the side, away from the substrate, of the first light-emitting unit. The third light-emitting unit is arranged on the side, away from the substrate, of the second light-emitting unit. The photonic crystal layer is arranged 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, and the photonic crystal layer is used for emitting light emitted by the first light-emitting unit, the second light-emitting unit or the third light-emitting unit towards the front view direction of the micro light-emitting device display panel. The micro-light-emitting device display panel has the advantage that the crosstalk problem of the display image quality of the micro-light-emitting device display panel is solved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a micro-luminescent device display panel. Background Art

[0002] There is a large amount of stray light in the light emitting direction of the light emitting chip of the Micro LED display panel with a large viewing angle, which causes crosstalk in the display quality of the Micro LED display panel. In order to improve the above problem, the conventional Micro LED display panel sets a high-reflectivity retaining wall structure between adjacent light emitting chips. The high-reflectivity retaining wall structure can collect stray light, thereby reducing the crosstalk in the display quality of the MLED display panel. However, as the resolution of Micro LED display panels becomes higher and higher, the spacing between the light emitting chips of the Micro LED display panel continues to decrease, making it more difficult to make retaining walls between adjacent light emitting chips. It is difficult to solve the above problem by setting a highly reflective retaining wall structure. Therefore, how to reduce the stray light in the wide viewing angle direction of the light emitting chip of the Micro LED display panel and reduce the crosstalk in the display quality of the Micro LED display panel is still a problem that needs to be solved. Summary of the Invention

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

[0004] An embodiment of the present application provides a micro-light-emitting device display panel, comprising a substrate and a light-emitting device layer provided on the substrate, wherein the light-emitting device layer comprises a plurality of light-emitting devices, each of the light-emitting devices comprising:

[0005] a first light-emitting unit, wherein the first light-emitting unit is disposed on the substrate;

[0006] a second light-emitting unit, the second light-emitting unit being disposed on a side of the first light-emitting unit away from the substrate;

[0007] a third light-emitting unit, the third light-emitting unit being disposed on a side of the second light-emitting unit away from the substrate;

[0008] A photonic crystal layer, wherein the photonic crystal layer is arranged 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, and 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 normal viewing direction of the micro-light-emitting device display panel.

[0009] Furthermore, the photonic crystal layer includes:

[0010] a first photonic crystal layer, the first photonic crystal layer being provided on a light-emitting surface of the first light-emitting unit, and having a lattice parameter corresponding to the wavelength of light emitted by the first light-emitting unit, so that the light emitted by the first light-emitting unit is emitted in a normal viewing direction of the micro-light-emitting device display panel;

[0011] a second photonic crystal layer, the second photonic crystal layer being provided on a light-emitting surface of the second light-emitting unit, and having a lattice parameter corresponding to the wavelength of light emitted by the second light-emitting unit, so that the light emitted by the second light-emitting unit is emitted in a normal viewing direction of the micro-light-emitting device display panel;

[0012] a third photonic crystal layer, the third photonic crystal layer being provided on a light-emitting surface of the third light-emitting unit, and having a lattice parameter corresponding to the wavelength of light emitted by the third light-emitting unit, so that the light emitted by the third light-emitting unit is emitted in a normal viewing direction of the micro-light-emitting device display panel;

[0013] In which, 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 in a non-overlapping area on the first light-emitting unit with the second light-emitting unit, and the second photonic crystal layer is located in a non-overlapping area on the second light-emitting unit with the third light-emitting unit.

[0014] Furthermore, the first photonic crystal layer has multiple first openings, the second photonic crystal layer has multiple second openings, and the third photonic crystal layer has multiple 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 color of the light emitted by the first light-emitting unit, the color of the light emitted by the second light-emitting unit, and the color of the light emitted by the third light-emitting unit are different, and the aperture of the first opening is not larger than the wavelength of the light emitted by the first light-emitting unit, the aperture of the second opening is not larger than the wavelength of the light emitted by the second light-emitting unit, and the aperture of the third opening is not larger than the wavelength of the light emitted by the third light-emitting unit.

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

[0017] Furthermore, 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.

[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 stacked in sequence;

[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 in sequence;

[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 which are stacked in sequence;

[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-luminescent device display panel further includes:

[0023] an encapsulation layer, the encapsulation layer being provided on the substrate and covering the light-emitting device;

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

[0025] 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 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] Beneficial effects of this application:

[0028] The present application provides a micro-light-emitting device display panel. The micro-light-emitting device display panel includes a photonic crystal layer, and the photonic crystal layer is arranged 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 emit the light emitted by the first light-emitting unit, the second light-emitting unit or the third light-emitting unit in the normal viewing direction of the micro-light-emitting device display panel, thereby reducing the 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. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

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

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

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

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

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

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

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

[0041] Figure 13 This is a schematic diagram of the third photonic crystal layer of the light-emitting device of the micro-light-emitting device display panel in 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-packaging layer; 40-microlens layer, 410-sub-lens portion. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. The technical solutions described below are only used to explain and illustrate the ideas of the present application and should not be regarded as limiting the scope of protection of the present application.

[0044] In addition, the terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different technical features. The term "plurality" and similar words mean two or more, unless otherwise expressly limited.

[0045] The first embodiment of the present application provides a micro-light emitting device display panel, referring to Figure 5-Figure 8The micro-light-emitting device display panel includes a substrate 10 and a light-emitting device layer 20 provided on the substrate 10, wherein the light-emitting device layer 20 includes a plurality of light-emitting devices 20, each of the light-emitting devices 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, and the photonic crystal layer 240 is used to direct 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 normal viewing direction of the micro-light-emitting device display panel.

[0046] Specifically, the first light-emitting unit 210 is arranged on the substrate 10; the second light-emitting unit 220 is arranged on the side of the first light-emitting unit 210 away from the substrate 10; the third light-emitting unit 230 is arranged 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, and the photonic crystal layer 240 is arranged 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 parameter of the first photonic crystal layer corresponds 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 setting a micro-light-emitting device display panel to include a first photonic crystal layer 241, and setting 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 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 normal viewing direction of the micro-light-emitting device display panel, thereby reducing the 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 normal viewing direction of the micro-light-emitting device display panel is an angle range of no more than 10° between the light emitted by the first light-emitting unit 210, the light emitted by the second light-emitting unit 220, or the light emitted by the third light-emitting unit 230 and the direction perpendicular to the light-emitting plane of the micro-light-emitting device display panel.

[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 in a non-overlapping area on the first light-emitting unit 210 with the second light-emitting unit 220, and the second photonic crystal layer 242 is located in a non-overlapping area on the second light-emitting unit 220 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 openings, the distance between two adjacent openings, and the depth of the openings.

[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 apertures of the first openings 2411 correspond to the wavelength of the light emitted by the first light-emitting unit 210. By arranging 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 240 can direct the light emitted by the first light-emitting unit 210 toward the normal 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. The aperture d1 of the first openings 2411 corresponds to the wavelength of the light emitted by the second light-emitting unit 220. By arranging 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 openings 2411 corresponding to the wavelength of the light emitted by the second light-emitting unit 220, the photonic crystal layer 240 can direct the light emitted by the second light-emitting unit 220 toward the normal 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. The aperture d1 of the first openings 2411 corresponds to the wavelength of the light emitted by the third light-emitting unit 230. By arranging 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 openings 2411 corresponding to the wavelength of the light emitted by the third light-emitting unit 230, the photonic crystal layer 240 can direct the light emitted by the third light-emitting unit 230 toward the normal 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 a top view of the micro-light-emitting device display panel, the first photonic crystal layer 241 is in a grid shape.

[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 a non-overlapping area on the first light-emitting unit 210 with the second light-emitting unit 220 or a non-overlapping area on the second light-emitting unit 220 with the third light-emitting unit 230.

[0055] In this embodiment, the color of the light emitted by the first light emitting unit 210 is red, the color of the light emitted by the second light emitting unit 220 is green, and the color of 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 Figure 1-Figure 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 devices 20. The microlens layer 40 is disposed on a side of the encapsulation layer 30 away from the substrate 10. The microlens layer 40 includes a plurality of sub-lens portions 410, each corresponding to a light-emitting device 20. By configuring the microlens layer 40 to include a plurality of sub-lens portions 410, each corresponding to a light-emitting device 20, the sub-lens portions 410 can converge light from the light-emitting devices 20, preventing light from the light-emitting devices 20 from entering adjacent sub-lens portions 410, thereby reducing interference from light from adjacent light-emitting devices 20 and further improving the crosstalk problem in the display quality of the micro-light-emitting device display panel caused by stray light.

[0057] In this embodiment, reference Figure 2 and Figure 3The first axis L passing through the center of the sub-lens portion 410 coincides with the second axis M passing through the center of the light-emitting device 20, wherein the extending direction of the first axis L is the same as the light emitting direction of the micro-light-emitting device display panel, and the extending direction of the second axis M is the same as the light emitting 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 to coincide with the second axis M passing through the center of the light-emitting device 20, wherein the extending direction of the first axis L is the same as the light emitting direction of the micro-light-emitting device display panel, and the extending direction of the second axis M is the same as the light emitting direction of the micro-light-emitting device display panel, light from the light-emitting device 20 can be converged toward the center, thereby improving the light emitting brightness of the micro-light-emitting device display panel in the normal viewing 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 with each other, wherein 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 with each other, wherein 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, light from the light-emitting device 20 can be converged in a certain direction, thereby improving the light brightness of the micro-light-emitting device display panel at a certain side viewing angle.

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

[0060] The second embodiment of the present application provides a second micro-light emitting device display panel, referring to Figure 5 and Figure 9The second embodiment is similar to the first embodiment. The difference between the second embodiment and the first embodiment is 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, and 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 wavelength of the light emitted by the second light emitting unit or the wavelength of the light emitted by the third light emitting unit, and 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 wavelength of the light emitted by the second light emitting unit 220 or the wavelength of the other two of the light emitted by the third light emitting unit.

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

[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 setting a micro-light-emitting device display panel including a first photonic crystal layer 241 and a second photonic crystal layer 242, and setting the first photonic crystal layer 241 on the light-emitting surface of the first light-emitting unit 210, 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 opening 2411 corresponds to the wavelength of the light emitted by the first light-emitting unit 210, and the aperture d1 of the first opening 2411 corresponds to the wavelength of the light emitted by the second light-emitting unit 220, so that the first photonic crystal layer 241 can emit the light emitted by the first light-emitting unit 210 toward the normal viewing direction of the micro-light-emitting device display panel, and the second photonic crystal layer 242 can emit the light emitted by the second light-emitting unit 220 toward the normal viewing direction of the micro-light-emitting device display panel, thereby reducing the 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 setting the first photonic crystal layer 241 on the light-emitting surface of the first light-emitting unit 210 and the second photonic crystal layer 242 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 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, so that the first photonic crystal layer 241 can emit the light emitted by the first light-emitting unit 210 toward the normal viewing direction of the micro-light-emitting device display panel, and the second photonic crystal layer 242 can emit the light emitted by the third light-emitting unit 230 toward the normal viewing direction of the micro-light-emitting device display panel, thereby reducing the 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.

[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 setting 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 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, so that the first photonic crystal layer 241 can emit the light emitted by the third light-emitting unit 230 toward the normal viewing direction of the micro-light-emitting device display panel, and the second photonic crystal layer 242 can emit the light emitted by the second light-emitting unit 220 toward the normal viewing direction of the micro-light-emitting device display panel, thereby reducing the 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.

[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 in a non-overlapping area on the first light-emitting unit 210 with the second light-emitting unit 220, or the first photonic crystal layer 241 is located in a non-overlapping area on the second light-emitting unit 220 with the third light-emitting unit 230.

[0066] In this embodiment, the color of the light emitted by the first light emitting unit 210 is red, the color of the light emitted by the second light emitting unit 220 is green, and the color of 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 a 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 devices 20. The microlens layer 40 is disposed on a side of the encapsulation layer 30 away from the substrate 10. The microlens layer 40 includes a plurality of sub-lens portions 410, each corresponding to a light-emitting device 20. By configuring the microlens layer 40 to include a plurality of sub-lens portions 410, each corresponding to a light-emitting device 20, the sub-lens portions 410 can converge light from the light-emitting devices 20, preventing light from the light-emitting devices 20 from entering adjacent sub-lens portions 410, thereby reducing interference between light from adjacent light-emitting devices 20 and further improving the crosstalk problem of the display quality of the micro-light-emitting device display panel caused by stray light.

[0069] In this embodiment, reference Figure 2 and Figure 3The first axis L passing through the center of the sub-lens portion 410 coincides with the second axis M passing through the center of the light-emitting device 20, wherein the extending direction of the first axis L is the same as the light emitting direction of the micro-light-emitting device display panel, and the extending direction of the second axis M is the same as the light emitting 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 to coincide with the second axis M passing through the center of the light-emitting device 20, wherein the extending direction of the first axis L is the same as the light emitting direction of the micro-light-emitting device display panel, and the extending direction of the second axis M is the same as the light emitting direction of the micro-light-emitting device display panel, light from the light-emitting device 20 can be converged toward the center, thereby improving the light emitting brightness of the micro-light-emitting device display panel in the normal viewing 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 with each other, wherein the extension direction of the first axis L is the same as the light-emitting direction of the micro-light-emitting device display panel, and the extension direction of the second axis M is the same as the light-emitting 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 with each other, wherein the extension direction of the first axis L is the same as the light-emitting direction of the micro-light-emitting device display panel, and the extension direction of the second axis M is the same as the light-emitting direction of the micro-light-emitting device display panel, the light of the light-emitting device 20 can be converged in a direction to one side, thereby improving the luminous brightness of the micro-light-emitting device display panel at a certain side viewing angle. The third embodiment of the present application provides a micro-light-emitting device display panel, with reference to Figure 5 and references Figure 10 The second embodiment is similar to the first embodiment. The difference between the second embodiment and the first embodiment is 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 arranged on the light-emitting surface of the first light-emitting unit 210, the second photonic crystal layer 242 is arranged on the light-emitting surface of the second light-emitting unit 220, and the third photonic crystal layer 243 is arranged on the light-emitting surface of 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 lattice parameter of the second photonic crystal layer corresponds to the wavelength of the light emitted by the second light-emitting unit, and the lattice parameter of the third photonic crystal layer corresponds to the wavelength of the light emitted by the third light-emitting unit.

[0071] By arranging 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, the lattice parameter of the first photonic crystal layer corresponds to the wavelength of the light emitted by the first light-emitting unit, the lattice parameter of the second photonic crystal layer corresponds to the wavelength of the light emitted by the second light-emitting unit, and the lattice parameter of the third photonic crystal layer corresponds to the wavelength of the light emitted by the third light-emitting unit, so that the light emitted by the first light-emitting unit is emitted in the normal viewing direction of the micro-light-emitting device display panel, the light emitted by the second light-emitting unit is emitted in the normal viewing direction of the micro-light-emitting device display panel, and the light emitted by the third light-emitting unit is emitted in the normal viewing direction of the micro-light-emitting device display panel, thereby reducing the 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 openings, the distance between two adjacent openings, and the depth of the openings.

[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, wherein 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 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, 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 second light-emitting unit 220, so that The first photonic crystal layer 241 is capable of directing light emitted from the first light-emitting unit 210 toward the normal viewing direction of the micro-light-emitting device display panel, the second photonic crystal layer 242 is capable of directing light emitted from the second light-emitting unit 220 toward the normal viewing direction of the micro-light-emitting device display panel, and the third photonic crystal layer 243 is capable of directing light emitted from the third light-emitting unit 230 toward the normal viewing direction of the micro-light-emitting device display panel, thereby reducing stray light from the light-emitting devices 20 of the micro-light-emitting device display panel at a wide viewing angle and improving the crosstalk problem of the display image quality of the micro-light-emitting device display panel. In this embodiment, in a 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, and 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 region 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 region 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 method of unequal size of vertically stacked light-emitting units is adopted, so that the first photonic crystal layer 241 can be set 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 can be set on the second light-emitting unit 220 in a non-overlapping area with the third light-emitting unit 230, ensuring that the first photonic crystal layer 241 can effectively control the light emitted from the first light-emitting unit 210 to be collimated and emitted 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 and emitted 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 colors of the light emitted by the second light-emitting unit 220, and the colors of the light emitted by 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 color of the light emitted by the first light emitting unit 210, the color of the light emitted by the second light emitting unit 220, and the color of the light emitted by the third light emitting unit 230 to be 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, each light emitting device 20 can have three light-emitting areas of different colors, and the aperture d1 of the first opening 2411 is not larger than the wavelength of the light emitted by the first light-emitting unit 210, the aperture d2 of the second opening 2421 is not larger 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 larger than the wavelength of the light emitted by the third light-emitting unit 230, which can avoid the reduction of the light efficiency of the micro-light-emitting device display panel due to the excessive width of the first opening 2411, the second opening 2421, and the third opening 2431.

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

[0076] In this embodiment, in a 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 devices 20. The microlens layer 40 is disposed on a side of the encapsulation layer 30 away from the substrate 10. The microlens layer 40 includes a plurality of sub-lens portions 410, each corresponding to a light-emitting device 20. By configuring the microlens layer 40 to include a plurality of sub-lens portions 410, each corresponding to a light-emitting device 20, the sub-lens portions 410 can converge light from the light-emitting devices 20, preventing light from the light-emitting devices 20 from entering adjacent sub-lens portions 410, thereby reducing interference between light from adjacent light-emitting devices 20 and further improving the crosstalk problem of the display quality of the micro-light-emitting device display panel caused by stray light.

[0078] In this embodiment, reference Figure 2 and Figure 3The first axis L passing through the center of the sub-lens portion 410 coincides with the second axis M passing through the center of the light-emitting device 20, wherein the extending direction of the first axis L is the same as the light emitting direction of the micro-light-emitting device display panel, and the extending direction of the second axis M is the same as the light emitting 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 to coincide with the second axis M passing through the center of the light-emitting device 20, wherein the extending direction of the first axis L is the same as the light emitting direction of the micro-light-emitting device display panel, and the extending direction of the second axis M is the same as the light emitting direction of the micro-light-emitting device display panel, light from the light-emitting device 20 can be converged toward the center, thereby improving the light emitting brightness of the micro-light-emitting device display panel in the normal viewing 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 with each other, wherein 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 with each other, wherein 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, light from the light-emitting device 20 can be converged in a certain direction, thereby improving the light brightness of the micro-light-emitting device display panel at a certain side 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 in sequence; 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 in sequence; 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 in sequence; wherein the first photonic crystal layer 241 is located on the surface of the second semiconductor layer 215 on the side away from the substrate 10, the second photonic crystal layer 242 is located on the surface of the fourth semiconductor layer 225 on the side away from the substrate 10, and the third photonic crystal layer 243 is located on the surface of the sixth semiconductor layer 235 on the side away from the substrate 10. By providing the first reflective layer 211, the second reflective layer 221 and the third reflective layer 231, the first reflective layer 211 can direct the light emitted downwardly from 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 the light emitted downwardly from 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 the light emitted downwardly from 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 also 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 above describes in detail the specific embodiments of the present application. The above embodiments disclosed in this application are merely preferred embodiments of the present application. Those skilled in the art will appreciate that many variations and improvements can be made without departing from the spirit of the present application. These variations 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 invention comprises a substrate and a light-emitting device layer provided on the substrate, wherein the light-emitting device layer comprises a plurality of light-emitting devices, and each of the light-emitting devices comprises: A first light emitting unit, wherein the first light emitting unit is disposed on the substrate; a second light emitting unit, the second light emitting unit being disposed on a side of the first light emitting unit away from the substrate; a third light emitting unit, the third light emitting unit being disposed on a side of the second light emitting unit away from the substrate; A photonic crystal layer, wherein the photonic crystal layer is arranged 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, and 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 normal viewing direction of the micro-light emitting device display panel.

2. The micro-light emitting device display panel according to claim 1, characterized in that: The photonic crystal layer comprises: a first photonic crystal layer, wherein the first photonic crystal layer is disposed on a light-emitting surface of the first light-emitting unit, and a lattice parameter of the first photonic crystal layer corresponds to a wavelength of light emitted by the first light-emitting unit, so that the light emitted by the first light-emitting unit is emitted toward a normal viewing direction of the micro-light-emitting device display panel; a second photonic crystal layer, the second photonic crystal layer being disposed on the light-emitting surface of the second light-emitting unit, and having a lattice parameter corresponding 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 a normal viewing direction of the micro-light-emitting device display panel; a third photonic crystal layer, the third photonic crystal layer being arranged on the light-emitting surface of the third light-emitting unit, and the lattice parameter of the third photonic crystal layer corresponds 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 a normal viewing direction of the micro-light-emitting device display panel; Among them, 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 in a non-overlapping area on the first light-emitting unit with the second light-emitting unit, and the second photonic crystal layer is located in a non-overlapping area on the second light-emitting unit with 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 color of the light emitted by the first light-emitting unit, the color of the light emitted by the second light-emitting unit, and the color of the light emitted by the third light-emitting unit are different, and the aperture of the first opening is not larger than the wavelength of the light emitted by the first light-emitting unit, the aperture of the second opening is not larger than the wavelength of the light emitted by the second light-emitting unit, and the aperture of the third opening is not larger 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 color of the light emitted by the first light-emitting unit is red, the color of the light emitted by the second light-emitting unit is green, the color of the light emitted by the third light-emitting unit is blue, the aperture of the first opening is 620nm~750nm, the aperture of the second opening is 520nm~570nm, and the aperture of the third opening is 490nm~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 in sequence; 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 which are stacked in sequence; 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 which are stacked in sequence; 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 further includes: An encapsulation layer, wherein the encapsulation layer is disposed on the substrate and covers the light-emitting device; A microlens layer is provided on a side of the packaging layer away from the substrate, the microlens layer comprises a plurality of sub-lens portions, each of the sub-lens portions corresponds to one of the light-emitting devices, and the focal length of the sub-lens portions is greater than the thickness of the packaging layer.

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

Images