Micro light-emitting device display panel

Abstract

The invention discloses a micro light-emitting device display panel which comprises a substrate, a plurality of light-emitting devices, a packaging layer and a micro lens layer. The light-emitting device is arranged on the substrate; the packaging layer is arranged on the substrate, and the packaging layer covers the light emitting device; the micro-lens layer is arranged on one side, far away from the substrate, of the packaging layer, and the micro-lens layer comprises a plurality of micro-lenses; in the first direction of the light-emitting device, the difference value between the length of the first light-emitting layer and the length of the second light-emitting layer and the length of the third light-emitting layer is smaller than a preset value.

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] In a conventional micro-light emitting device display panel, in order to improve the brightness of the display screen of the micro-light emitting device display panel, a microlens layer is provided on the side of the light emitting device layer of the micro-light emitting device display panel away from the substrate, and the microlens layer can guide the light of the light emitting device to be emitted toward the light emitting surface of the micro-light emitting device display panel, thereby improving the brightness of the display screen of the micro-light emitting device display panel. Although the microlens layer can improve the brightness of the display screen of the micro-light emitting device display panel, it also causes the white display screen of the micro-light emitting device display panel to produce color deviation at a side viewing angle. Summary of the invention

[0003] The embodiments of the present application provide a micro-light emitting device display panel to improve the color shift problem of a white display picture of the micro-light emitting device display panel at a side viewing angle.

[0004] In a first aspect, an embodiment of the present application provides a micro-light emitting device display panel, comprising:

[0005] substrate;

[0006] A plurality of light-emitting devices, wherein the plurality of light-emitting devices are arranged on the substrate, the light-emitting devices include a red light-emitting device, a green light-emitting device and a blue light-emitting device, the red light-emitting device, the green light-emitting device and the blue light-emitting device are arranged at intervals, the red light-emitting device includes a first light-emitting layer, the green light-emitting device includes a second light-emitting layer, and the blue light-emitting device includes a third light-emitting layer;

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

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

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

[0010] Furthermore, the microlens is hemispherical, each of the microlenses is disposed on a light-emitting device, and the axial direction of the microlens coincides with the direction of the central axis of the corresponding light-emitting device.

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

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

[0013] Furthermore, in the first direction of the light-emitting device of the light-emitting unit, the difference between the length of the first light-emitting layer and the length of the second light-emitting layer is not greater than 10% of the length of the light-emitting device, and / or the difference between the length of the first light-emitting layer and the length of the third light-emitting layer is not greater than 10% of the length of the light-emitting device.

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

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

[0016] Further, the red light emitting device further comprises a first horizontal electrode, a first transparent electrode layer, a first semiconductor layer, a second semiconductor layer and a first vertical electrode, wherein the first horizontal electrode is electrically connected to the substrate, the first transparent electrode layer is arranged on a side of the first horizontal electrode away from the substrate, the first semiconductor layer is arranged on a surface of the first transparent electrode layer away from the substrate, the first light emitting layer is arranged on a surface of the first semiconductor layer away from the substrate, the second semiconductor layer is arranged on a surface of the first light emitting layer away from the substrate, one end of the first vertical electrode is connected to the second semiconductor layer, and the other end of the first vertical electrode is electrically connected to the substrate;

[0017] The green light emitting device further comprises a second horizontal electrode, a second transparent electrode layer, a third semiconductor layer, a fourth semiconductor layer and a second vertical electrode, the second horizontal electrode is electrically connected to the substrate, the second transparent electrode layer is arranged on a side of the second horizontal electrode away from the substrate, the third semiconductor layer is arranged on a surface of the second transparent electrode layer away from the substrate, the second light emitting layer is arranged on a surface of the third semiconductor layer away from the substrate, the fourth semiconductor layer is arranged on a surface of the second light emitting layer away from the substrate, one end of the second vertical electrode is connected to the fourth semiconductor layer, and the other end of the second vertical electrode is electrically connected to the substrate;

[0018] The blue light emitting device further comprises a third horizontal electrode, a third transparent electrode layer, a fifth semiconductor layer, a sixth semiconductor layer and a third vertical electrode, wherein the third horizontal electrode is electrically connected to the substrate, the third transparent electrode layer is arranged on a side of the third horizontal electrode away from the substrate, the fifth semiconductor layer is arranged on a surface of the third transparent electrode layer away from the substrate, the third light emitting layer is arranged on a surface of the fifth semiconductor layer away from the substrate, the sixth semiconductor layer is arranged on a surface of the third light emitting layer away from the substrate, one end of the third vertical electrode is connected to the sixth semiconductor layer, and the other end of the third vertical electrode is electrically connected to the substrate;

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

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

[0021] Beneficial effects of this application:

[0022] The present application provides a micro-light emitting device display panel, wherein the light emitting devices include a red light emitting device, a green light emitting device and a blue light emitting device, the red light emitting device, the green light emitting device and the blue light emitting device are arranged at intervals, the red light emitting device includes a first light emitting layer, the green light emitting device includes a second light emitting layer, and the blue light emitting device includes a third light emitting layer. In a first direction of the light emitting device, the difference between the length of the first light emitting layer and the length of the second light emitting layer and the length of the third light emitting layer is less than a preset value, so that in the first direction of the light emitting device, the length of the second light emitting layer of each of the green light emitting devices and the length of the third light emitting layer of the blue light emitting device can match the length of the first light emitting layer of the red light emitting device, so as to ensure that the brightness of the red light emitting device, the green light emitting device and the blue light emitting device at different side viewing angles of a white display screen of the micro-light emitting device display panel is similar, thereby reducing the brightness difference of the red light emitting device, the green light emitting device and the blue light emitting device at different side viewing angles of the white display screen of the micro-light emitting device display panel, thereby improving the color deviation problem of the side viewing angle of the white display screen of the micro-light emitting device display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a relationship diagram of the light intensity corresponding to the side viewing angle of the red light emitting device, the green light emitting device, and the blue light emitting device of the traditional micro-light emitting device display panel;

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

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

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

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

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

[0029] Figure 7 yes Figure 6 A structural diagram of a red light emitting device of a micro light emitting device display panel shown;

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

[0031] Fig. 9 yes Figure 8 A structural diagram of a green light emitting device of a micro light emitting device display panel shown;

[0032] Fig.10 is a top view of a blue light emitting device of a micro light emitting device display panel of the present application;

[0033] Fig.11 yes Fig.10 A structural diagram of a blue light emitting device of a micro light emitting device display panel shown;

[0034] Fig.12 It is a relationship diagram of the light output intensity corresponding to the side viewing angle of the red light emitting device, the green light emitting device, and the blue light emitting device of the micro-light emitting device display panel of the present application.

[0035] 10-micro light-emitting device display panel; 100-substrate; 200-light-emitting device, 210-red light-emitting device, 211-first light-emitting layer, 212-first transparent electrode layer, 213-first semiconductor layer, 214-second semiconductor layer, 215-first vertical electrode, 216-first horizontal electrode, 220-green light-emitting device, 221-second light-emitting layer, 222-second transparent electrode layer, 223-third semiconductor layer, 224-fourth semiconductor layer, 225-first vertical electrode, 226-second horizontal electrode, 230-blue light-emitting device, 231-third light-emitting layer, 232-third transparent electrode layer, 233-fifth semiconductor layer, 234-sixth semiconductor layer, 235-first vertical electrode, 236-third horizontal electrode; 300-encapsulation layer; 400-microlens layer, 410-microlens. DETAILED DESCRIPTION

[0036] 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.

[0037] 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 clearly defined.

[0038] The first embodiment of the present application provides a micro-light emitting device display panel 10, referring to Figure 2 , Figure 3 , Figure 4The micro-light emitting device display panel 10 includes a substrate 100, a plurality of light emitting devices 200, an encapsulation layer 300 and a microlens layer 400; the light emitting devices 200 are arranged on the substrate 100, and the light emitting devices 200 include a red light emitting device 210, a green light emitting device 220 and a blue light emitting device 230, the red light emitting device 210, the green light emitting device 220 and the blue light emitting device 230 are arranged at intervals, the red light emitting device 210 includes a first light emitting layer 211, the green light emitting device 220 includes a second light emitting layer 221, and the blue light emitting device 230 includes a first light emitting layer 212. The encapsulation layer 300 is disposed on the substrate 100, and the encapsulation layer 300 covers the light-emitting device 200; the microlens layer 400 is disposed on a side of the encapsulation layer 300 away from the substrate 100, and the microlens layer 400 includes a plurality of microlenses 410, and the plurality of microlenses 410 are arranged in an array; wherein the microlenses are hemispherical, and each of the microlenses is covered on one of the light-emitting devices, and in a first direction of the light-emitting device 200, the difference between the length of the first light-emitting layer, the length of the second light-emitting layer, and the length of the third light-emitting layer is less than a preset value.

[0039] refer to Figure 1 , because the materials of the light-emitting layers of the red light-emitting devices, green light-emitting devices, and blue light-emitting devices of the conventional micro-light-emitting device display panel 10 are different, when the sizes of the red light-emitting devices, green light-emitting devices, and blue light-emitting devices are the same, the area of ​​the light-emitting layer of the red light-emitting device is larger than the areas of the light-emitting layers of the green light-emitting devices and the blue light-emitting devices. After a microlens layer is provided on the side of the light-emitting device layer away from the substrate, the difference in viewing angles of the light of the red light-emitting devices, the green light-emitting devices, and the blue light-emitting devices increases. Within the viewing angle range of 18° to 25°, the white display screen of the micro-light-emitting device display panel 10 will be reddish, causing the problem of color cast in the white display screen of the micro-light-emitting device display panel 10. Reference Fig.12Therefore, the light emitting device 200 includes a red light emitting device 210, a green light emitting device 220 and a blue light emitting device 230, the red light emitting device 210, the green light emitting device 220 and the blue light emitting device 230 are arranged at intervals, the red light emitting device 210 includes a first light emitting layer 211, the green light emitting device 220 includes a second light emitting layer 221, the blue light emitting device 230 includes a third light emitting layer 231, and in the first direction of the light emitting device 200, the difference between the length of the first light emitting layer and the length of the second light emitting layer and the length of the third light emitting layer is less than a preset value; so that in the first direction of the light emitting device 200, each of the light emitting devices The length of the second light-emitting layer 221 of the green light-emitting device 220 and the length of the third light-emitting layer 231 of the blue light-emitting device 230 of the device 200 can match the length of the first light-emitting layer 211 of the red light-emitting device 210, thereby ensuring that the brightness of the red light-emitting device 210, the green light-emitting device 220 and the blue light-emitting device 230 at different side viewing angles of the white display screen of the micro-luminescent device display panel 10 are similar, thereby reducing the brightness difference of the red light-emitting device 210, the green light-emitting device 220 and the blue light-emitting device 230 at different side viewing angles of the white display screen of the micro-luminescent device display panel 10, and further improving the color deviation problem of the side viewing angle of the white display screen of the micro-luminescent device display panel 10.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[0057] In this embodiment, when the microlens is hemispherical, not only the difference between the first light-emitting layer, the second light-emitting layer and the third light-emitting layer in the first direction of the light-emitting device will cause the white display screen of the micro-light-emitting device display panel 10 to be reddish within the viewing angle range of 18° to 25°, causing the white display screen of the micro-light-emitting device display panel 10 to have a color shift problem, but the difference in the length of the first light-emitting layer, the second light-emitting layer and the third light-emitting layer in the second direction of the light-emitting device will also cause the white display screen of the micro-light-emitting device display panel 10 to be reddish, causing the white display screen of the micro-light-emitting device display panel 10 to have a color shift problem. Therefore, it is further provided that in the second direction of the light-emitting device, the difference between the length of the first light-emitting layer and the length of the second light-emitting layer is not greater than 10% of the length of the light-emitting device, and / or the difference between the length of the first light-emitting layer and the length of the third light-emitting layer is not greater than 10% of the length of the light-emitting device. By arranging in the second direction of the light-emitting device, the difference between the length of the first light-emitting layer and the length of the second light-emitting layer is not greater than 10% of the length of the light-emitting device, and / or the difference between the length of the first light-emitting layer and the length of the third light-emitting layer is not greater than 10% of the length of the light-emitting device. On the one hand, the brightness difference of the red light-emitting device 210, the green light-emitting device 220 and the blue light-emitting device 230 at different side viewing angles of the white display screen of the micro-light-emitting device display panel 10 can be reduced, thereby improving the color deviation problem of the side viewing angle of the white display screen of the micro-light-emitting device display panel 10. On the other hand, it can avoid the problem of color deviation of the micro-light-emitting device display panel 10 at a large viewing angle caused by excessive difference in length between the second light-emitting layer 221 and the first light-emitting layer 211 in the first direction of the light-emitting device 200 and excessive difference in length between the third light-emitting layer 231 and the first light-emitting layer 211 in the first direction of the light-emitting device 200.

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

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

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

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

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

[0063] The light emitting device 200 includes a red light emitting device 210, a green light emitting device 220 and a blue light emitting device 230, the red light emitting device 210, the green light emitting device 220 and the blue light emitting device 230 are arranged at intervals, the red light emitting device 210 includes a first light emitting layer 211, the green light emitting device 220 includes a second light emitting layer 221, and the blue light emitting device 230 includes a third light emitting layer 231. In the first direction of the light emitting device 200, the difference between the length of the first light emitting layer and the length of the second light emitting layer and the length of the third light emitting layer is less than a preset value; so that in the first direction of the light emitting device 200, that is, to ensure that the plurality of micro lenses 410 In the direction of arrangement, the length of the second light-emitting layer 221 of the green light-emitting device 220 and the length of the third light-emitting layer 231 of the blue light-emitting device 230 can match the length of the first light-emitting layer 211 of the red light-emitting device 210, thereby ensuring that the brightness of the red light-emitting device 210, the green light-emitting device 220 and the blue light-emitting device 230 at different side viewing angles of the white display screen of the micro-luminescent device display panel 10 is similar, thereby reducing the brightness difference of the red light-emitting device 210, the green light-emitting device 220 and the blue light-emitting device 230 at different side viewing angles of the white display screen of the micro-luminescent device display panel 10, thereby improving the color deviation problem of the side viewing angle of the white display screen of the micro-luminescent device display panel 10. The difference between the second embodiment and the first embodiment is that since the microlens is cylindrical, when the microlens is cylindrical, the white display image of the micro-light-emitting device display panel 10 will be reddish. The problem of color cast of the white display image of the micro-light-emitting device display panel 10 is caused by the difference between the first light-emitting layer, the second light-emitting layer and the third light-emitting layer in the first direction of the light-emitting device. The difference between the first light-emitting layer, the second light-emitting layer and the third light-emitting layer in the second direction of the light-emitting device is not related.

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

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

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

[0067] In this embodiment, the microlens is cylindrical in shape, which means that the microlens is cylindrical in the second direction of the light-emitting device, the cross section of the microlens is semicircular, and the diameter direction of the semicircle is consistent with the first direction.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[0082] The above is a detailed description of the specific implementation of the present application. The above implementation disclosed in the present application is only the preferred implementation of the present application. For ordinary technicians in this field, many modifications and improvements can be made without departing from the concept of the present application. These modifications and improvements all fall within the scope of protection defined by the claims of the present application.

Claims

1. A micro-light emitting device display panel, characterized in that: include: substrate; A plurality of light-emitting devices, wherein the plurality of light-emitting devices are arranged on the substrate, the light-emitting devices include a red light-emitting device, a green light-emitting device and a blue light-emitting device, the red light-emitting device, the green light-emitting device and the blue light-emitting device are arranged at intervals, the red light-emitting device includes a first light-emitting layer, the green light-emitting device includes a second light-emitting layer, and the blue light-emitting device includes a third light-emitting layer; An encapsulation layer, wherein the encapsulation layer is disposed on the substrate and covers the light-emitting device; A microlens layer, the microlens layer is arranged on a side of the packaging layer away from the substrate, and the microlens layer includes a plurality of microlenses; Wherein, in the first direction of the light-emitting device, a difference between the length of the first light-emitting layer, the length of the second light-emitting layer, and the length of the third light-emitting layer is less than a preset value.

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

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

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

5. The micro-light emitting device display panel according to claim 2 or 3, characterized in that: In the first direction of the light-emitting device, the difference between the length of the first light-emitting layer and the length of the second light-emitting layer is not greater than 10% of the length of the light-emitting device, and / or the difference between the length of the first light-emitting layer and the length of the third light-emitting layer is not greater than 10% of the length of the light-emitting device.

6. The micro-light emitting device display panel according to claim 1, characterized in that: In the first direction of the light emitting device, the lengths of the red light emitting device, the green light emitting device and the blue light emitting device are equal, and the sizes of two adjacent micro lenses are the same.

7. The micro-light emitting device display panel according to claim 1, characterized in that: In a first direction of the light emitting devices, the length of the green light emitting device is greater than that of the red light emitting device, and the length of the blue light emitting device is greater than that of the red light emitting device.

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

9. The micro-light emitting device display panel according to claim 6, characterized in that: In the second direction of the light emitting device, the red light emitting device, the green light emitting device and the blue light emitting device have the same length.

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

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