Micro light emitting diode display panel and micro light emitting diode display device

Abstract

The invention provides a micro light-emitting diode display panel and a micro light-emitting diode display device. According to the micro light-emitting diode display panel, the gaps surrounding the light-emitting chips are formed in the prism layer, so that the gaps are arranged in an axial symmetry mode relative to the center lines of the light-emitting chips, and the distance between the transversely-arranged light-emitting chips and the gaps is equal to the distance between the obliquely-arranged light-emitting chips and the gaps; the reflecting angle of the light irradiated to the contact surface of the prism layer and the gap by the transversely arranged light-emitting chip is equal to the reflecting angle of the light irradiated to the contact surface of the prism layer and the gap by the obliquely arranged light-emitting chip. A plane formed by the contact surfaces of the light-emitting chip, the prism layer and the gap is the same as a meridian focal plane or sagittal plane, the problem of third-order aberration is solved, astigmatism is avoided, light crosstalk between adjacent sub-pixels is avoided through reflected light, and the display effect is further improved.

Description

Technical Field

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

[0002] With the development of augmented reality (AR) technology and virtual reality (VR) technology, the use of silicon-based light-emitting diode micro-display technology is the best solution to improve its display effect. Specifically, the micro-light-emitting diode display device includes a light-emitting chip and a prism. The prism is arranged on the light-emitting chip to control the light type of the light-emitting chip. However, in the actual display process, it is found that the spacing of the sub-pixels arranged horizontally is different from the spacing of the sub-pixels in the oblique direction, resulting in different morphologies of the prism in the horizontal and oblique directions. The inclined plane formed by the light-emitting chip and the prism is different from the meridian focal plane and the sagittal plane, resulting in third-order aberrations, resulting in astigmatism during display, affecting the display effect, and the crosstalk of the lateral light between adjacent sub-pixels will cause chromatic aberration problems, further affecting the display effect.

[0003] Therefore, the existing silicon-based micro-light emitting diode display devices have a technical problem that the prisms in different directions have different morphologies, resulting in display astigmatism and poor display effects. Summary of the invention

[0004] The embodiments of the present application provide a micro-LED display panel and a micro-LED display device, which are used to alleviate the technical problem that the existing silicon-based micro-LED display devices have different morphologies of prisms in different directions, resulting in display astigmatism and poor display effects.

[0005] The present invention provides a micro light emitting diode display panel, which includes:

[0006] substrate;

[0007] A light-emitting layer is disposed on one side of the substrate, the light-emitting layer comprises a light-emitting chip and a prism layer, and the prism layer is disposed on a side of the light-emitting chip away from the substrate;

[0008] The prism layer is provided with a gap surrounding the light-emitting chip, and the gap is arranged in an axisymmetric manner with respect to the center line of the light-emitting chip.

[0009] In some embodiments, the light-emitting layer further includes a common electrode layer, and the common electrode layer is disposed between the light-emitting chip and the prism layer;

[0010] The prism layer includes a protrusion and a connection portion, wherein the connection portion is located between adjacent protrusions, and a distance between the connection portion and the substrate is smaller than a distance between the protrusion and the substrate;

[0011] Wherein, the common electrode layer includes a first horizontal portion arranged corresponding to the raised portion, a second horizontal portion arranged corresponding to the connecting portion, and a third horizontal portion located between the first horizontal portion and the second horizontal portion. In the direction from the substrate to the light-emitting layer, the distance between the first horizontal portion and the bottom surface of the light-emitting chip is greater than the distance between the third horizontal portion and the bottom surface of the light-emitting chip, the distance between the second horizontal portion and the bottom surface of the light-emitting chip is greater than the distance between the third horizontal portion and the bottom surface of the light-emitting chip, and the second horizontal portion is arranged on the side of the third horizontal portion away from the substrate.

[0012] In some embodiments, in the direction from the substrate to the light-emitting layer, the distance between the first horizontal portion and the bottom surface of the light-emitting chip is greater than the distance between the second horizontal portion and the bottom surface of the light-emitting chip, and the gap is arc-shaped, and the gap protrudes toward the light-emitting chip along the area between adjacent light-emitting chips.

[0013] In some embodiments, the gap is disposed at the junction of the protruding portion and the connecting portion, and the gap bends from the protruding portion toward the connecting portion.

[0014] In some embodiments, in the direction from the substrate to the light-emitting layer, the distance between the first horizontal portion and the bottom surface of the light-emitting chip is equal to the distance between the second horizontal portion and the bottom surface of the light-emitting chip, and the gap is linear.

[0015] In some embodiments, in the direction from the substrate to the light-emitting layer, the distance between the first horizontal portion and the bottom surface of the light-emitting chip is smaller than the distance between the second horizontal portion and the bottom surface of the light-emitting chip, and the gap is arc-shaped, and the gap protrudes along the light-emitting chip toward the area between adjacent light-emitting chips.

[0016] In some embodiments, the light-emitting layer further includes an independent electrode layer, and the independent electrode layer is disposed on a side of the light-emitting chip away from the common electrode layer.

[0017] In some embodiments, the light-emitting chips are arranged in an array along a first direction and a second direction, the micro-LED display panel further includes a third direction, the third direction forms a first angle with the first direction, the third direction forms a second angle with the second direction, and the first angle and the second angle are both acute angles; the common electrode layer covers the light-emitting chips and is arranged between adjacent light-emitting chips;

[0018] Wherein, the width of the third horizontal portion of the common electrode layer arranged along the first direction is equal to the width of the third horizontal portion of the common electrode layer arranged along the third direction.

[0019] In some embodiments, the light emitting chips are arranged in an array along a first direction and a second direction, the micro light emitting diode display panel further includes a third direction, the third direction forms a first angle with the first direction, the third direction forms a second angle with the second direction, and the first angle and the second angle are both acute angles; the common electrode layer covers the light emitting chips and is arranged between adjacent light emitting chips, the second horizontal portion includes a first sub-portion and a second sub-portion, the first sub-portion is arranged along the first direction, and the second sub-portion is arranged along the third direction;

[0020] The difference between the width of the second sub-portion and the width of the first sub-portion is equal to the difference between the spacing between adjacent protrusions arranged along the third direction and the spacing between adjacent protrusions arranged along the first direction.

[0021] In some embodiments, there is a distance between the gap and an upper surface of the prism layer, and there is a distance between the gap and an upper surface of the common electrode layer.

[0022] In some embodiments, the refractive index of the prism layer ranges from 1.4 to 2.5.

[0023] At the same time, an embodiment of the present application provides a micro light emitting diode display device, which includes the micro light emitting diode display panel as described in any of the above embodiments.

[0024] Beneficial effects: The present application provides a micro-LED display panel and a micro-LED display device; the micro-LED display panel includes a substrate and a light-emitting layer, the light-emitting layer is arranged on one side of the substrate, the light-emitting layer includes a light-emitting chip and a prism layer, the prism layer is arranged on the side of the light-emitting chip away from the substrate, wherein the prism layer is provided with a gap surrounding the light-emitting chip, and the gap is arranged axially symmetrically about the center line of the light-emitting chip. The present application arranges a gap surrounding the light-emitting chip in the prism layer so that the gap is arranged axially symmetrically about the center line of the light-emitting chip, then the spacing between the light-emitting chip arranged horizontally and the gap is equal to the spacing between the light-emitting chip arranged obliquely and the gap, and the angle at which the light irradiated by the light-emitting chip arranged horizontally to the contact surface between the prism layer and the gap is reflected is equal to the angle at which the light irradiated by the light-emitting chip arranged obliquely to the contact surface between the prism layer and the gap is reflected, so that the plane formed by the contact surface between the light-emitting chip and the prism layer and the gap is the same as the meridional focal plane or the sagittal plane, thereby improving the problem of third-order aberration, avoiding astigmatism, and avoiding light crosstalk between adjacent sub-pixels by reflecting light, further improving the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0026] Figure 1 A schematic diagram of an existing silicon-based micro light-emitting diode display device.

[0027] Figure 2 for Figure 1 A1-A2 cross-sectional view of an existing silicon-based micro light-emitting diode display device.

[0028] Figure 3 for Figure 1 Schematic diagram B1-B2 of the existing silicon-based micro light-emitting diode display device.

[0029] Figure 4 A schematic diagram of a micro light emitting diode display panel provided in an embodiment of the present application.

[0030] Figure 5 for Figure 4 A first A1-A2 cross-sectional view of a micro light-emitting diode display panel.

[0031] Figure 6 for Figure 4 A first B1-B2 cross-sectional view of a micro light-emitting diode display panel.

[0032] Figure 7 for Figure 4 A second A1-A2 cross-sectional view of the micro light emitting diode display panel.

[0033] Figure 8 for Figure 4 A second B1-B2 cross-sectional view of the micro light-emitting diode display panel.

[0034] Fig. 9 for Figure 4 A third A1-A2 cross-sectional view of the micro light-emitting diode display panel.

[0035] Fig.10 for Figure 4 A third B1-B2 cross-sectional view of the micro light-emitting diode display panel.

[0036] Fig.11 This is a diagram of the imaging principle of an existing silicon-based micro-light-emitting diode display device.

[0037] Fig.12 This is a schematic diagram of the imaging principle of the micro light emitting diode display panel provided in an embodiment of the present application.

[0038] Fig.13 A schematic diagram of the display effect of the micro light emitting diode display panel provided in an embodiment of the present application.

[0039] Fig.14 It is a schematic diagram of the display effect of an existing silicon-based micro light-emitting diode display device.

[0040] Fig.15 A first structural schematic diagram of a micro light emitting diode display panel corresponding to each step of the method for preparing a micro light emitting diode display panel provided in an embodiment of the present application.

[0041] Fig.16 A second structural schematic diagram of a micro light emitting diode display panel corresponding to each step of the method for preparing a micro light emitting diode display panel provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0043] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0044] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0046] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0047] Figure 1 A schematic diagram of an existing silicon-based micro light-emitting diode display device. Figure 2 for Figure 1 A1-A2 cross-sectional view of an existing silicon-based micro light-emitting diode display device. Figure 3 for Figure 1 Schematic diagram B1-B2 of the existing silicon-based micro light-emitting diode display device.

[0048] like Figures 1 to 3 As shown, the existing silicon-based micro-LED display device 1 includes a plurality of sub-pixels 11, and the sub-pixels 11 include a first electrode 111, a light-emitting diode 112, an insulating layer 113, a second electrode 114, and a prism 115. The spacing L1 between the sub-pixels 11 arranged horizontally is different from the spacing L2 between the sub-pixels 11 arranged obliquely, so that the morphology of the prism 115 in the horizontal direction and the morphology in the oblique direction are different (from Figure 2 and Figure 3 It can be seen that the lateral direction is an angle, and the oblique direction is located on the horizontal line). When the light is irradiated onto the prism 115, the light from different directions is asymmetrically incident onto the prism 115, causing the inclined plane formed by the light-emitting diode 112 and the prism 115 to be different from the meridian focal plane and the sagittal plane, resulting in third-order aberration, and thus astigmatism occurs during display, affecting the display effect, and the crosstalk of lateral light between adjacent sub-pixels will cause chromatic aberration problems, further affecting the display effect. Specifically, as Figure 2 and Figure 3 As shown, the same exit angle has different angles when the first light 116 and the second light 117 are irradiated to the prism 115 in different directions, resulting in different exit angles and astigmatism. Therefore, the existing silicon-based micro-LED display device has a technical problem that the prisms in different directions have different morphologies, resulting in display astigmatism and poor display effects.

[0049] Figure 4 A schematic diagram of a micro light emitting diode display panel provided in an embodiment of the present application. Figure 5 for Figure 4A first A1-A2 cross-sectional view of a micro light-emitting diode display panel. Figure 6 for Figure 4 A first B1-B2 cross-sectional view of a micro light-emitting diode display panel. Figure 7 for Figure 4 A second A1-A2 cross-sectional view of the micro light emitting diode display panel. Figure 8 for Figure 4 A second B1-B2 cross-sectional view of the micro light-emitting diode display panel. Fig. 9 for Figure 4 A third A1-A2 cross-sectional view of the micro light-emitting diode display panel. Fig.10 for Figure 4 A third B1-B2 cross-sectional view of the micro light-emitting diode display panel. Fig.11 This is a diagram of the imaging principle of an existing silicon-based micro-light-emitting diode display device. Fig.12 This is a schematic diagram of the imaging principle of the micro light emitting diode display panel provided in an embodiment of the present application. Fig.13 A schematic diagram of the display effect of the micro light emitting diode display panel provided in an embodiment of the present application, Fig.14 It is a schematic diagram of the display effect of an existing silicon-based micro light-emitting diode display device. Fig.15 A first structural schematic diagram of a micro light emitting diode display panel corresponding to each step of the method for preparing a micro light emitting diode display panel provided in an embodiment of the present application. Fig.16 A second structural schematic diagram of a micro light emitting diode display panel corresponding to each step of the method for preparing a micro light emitting diode display panel provided in an embodiment of the present application.

[0050] The embodiments of the present application provide a micro light emitting diode display panel and a micro light emitting diode display device to alleviate the above-mentioned technical problems.

[0051] The present application embodiment provides a micro light emitting diode display panel, such as Figures 4 to 6 As shown, the micro light emitting diode display panel 2 includes:

[0052] substrate 22;

[0053] A light emitting layer 23 is disposed on one side of the substrate 22. The light emitting layer 23 includes a light emitting chip 232 and a prism layer 235. The prism layer 235 is disposed on a side of the light emitting chip 232 away from the substrate 22.

[0054] The prism layer 235 is provided with a gap 24 surrounding the light emitting chip 232 , and the gap 24 is arranged in an axisymmetric manner with respect to a center line 232 a of the light emitting chip 232 .

[0055] The embodiment of the present application provides a micro light emitting diode display panel 2, which is provided with a gap 24 surrounding a light emitting chip 232 in a prism layer 235 so that the gap 24 is axially symmetrical about a center line 232a of the light emitting chip 232. Then, the spacing between the light emitting chip 232 arranged horizontally and the gap 24 is equal to the spacing between the light emitting chip 232 arranged obliquely and the gap 24. The angle at which the light irradiated from the light emitting chip 232 arranged horizontally to the contact surface between the prism layer 235 and the gap 24 is reflected is equal to the angle at which the light irradiated from the light emitting chip 232 arranged obliquely to the contact surface between the prism layer 235 and the gap 24 is reflected. Therefore, the plane formed by the contact surface between the light emitting chip 232 and the prism layer 235 and the gap 24 is the same as the meridian focal plane or the sagittal plane, thereby improving the problem of third-order aberration, avoiding astigmatism, and avoiding light crosstalk between adjacent sub-pixels by reflecting light, thereby further improving the display effect.

[0056] Specifically, since the prism layer 235 is provided with a gap 24 surrounding the light-emitting chip 232, the spacing between the light-emitting chip 232 and the gap 24 in the lateral direction is equal to the spacing between the light-emitting chip 232 and the gap 24 in the oblique direction, and the gap 24 is symmetrical about the center line 232a of the light-emitting chip 232, then in the lateral direction, the angle at which the light emitted by the light-emitting chip 232 is reflected after irradiating the interface between the prism layer 235 and the gap 24 is equal to the angle at which the light emitted by the light-emitting chip 232 is reflected after irradiating the interface between the prism layer 235 and the gap 24 in the oblique direction, that is, the light can be symmetrically irradiated to the interface between the prism layer 235 and the gap 24, so that there will be no astigmatism when the light is emitted, thereby improving the display effect, and since the light is reflected at the interface between the prism layer 235 and the gap 24, crosstalk between the light emitted by adjacent light-emitting chips 232 can be avoided, color difference can be avoided, and the display effect can be further improved.

[0057] Specifically, air is provided in the gap 24, and the refractive index of the prism layer 235 is different from that of the air, so that when the light is irradiated to the contact surface between the prism layer 235 and the gap 24, it can be totally reflected, thereby adjusting the angle of the light emitted by the light-emitting layer 23, making the light emitted by the light-emitting layer 23 symmetrically arranged, modifying the light type, improving the problems of dispersion and light crosstalk, and improving the display effect.

[0058] In some embodiments, Figure 5 , Figure 6 As shown, the light emitting layer 23 further includes a common electrode layer 234, and the common electrode layer 234 is disposed between the light emitting chip 232 and the prism layer 235;

[0059] The prism layer 235 includes a protrusion 235a and a connection portion 235b, wherein the connection portion 235b is located between adjacent protrusions 235a, and a distance between the connection portion 235b and the substrate 22 is smaller than a distance between the protrusion 235a and the substrate 22;

[0060] Among them, the common electrode layer 234 includes a first horizontal portion 234a arranged corresponding to the protruding portion 235a, a second horizontal portion 234b arranged corresponding to the connecting portion 235b, and a third horizontal portion 234c located between the first horizontal portion 234a and the second horizontal portion 234b. In the direction from the substrate 22 to the light-emitting layer 23, the distance H1 between the first horizontal portion 234a and the bottom surface of the light-emitting chip 232 is greater than the distance H3 between the third horizontal portion 234c and the bottom surface of the light-emitting chip 232, the distance H2 between the second horizontal portion 234b and the bottom surface of the light-emitting chip 232 is greater than the distance H3 between the third horizontal portion 234c and the bottom surface of the light-emitting chip 232, and the second horizontal portion 234b is arranged on the side of the third horizontal portion 234c away from the substrate 22. By making the distance between the first horizontal portion 234a and the bottom surface of the light-emitting chip 232 greater than the distance between the third horizontal portion 234c and the bottom surface of the light-emitting chip 232, and the distance between the second horizontal portion 234b and the bottom surface of the light-emitting chip 232 greater than the distance between the third horizontal portion 234c and the bottom surface of the light-emitting chip 232, and the second horizontal portion 234b is arranged on the side of the third horizontal portion 234c away from the substrate 22, the first horizontal portion 234a, the second horizontal portion 234b and the third horizontal portion 234c can form a groove area, so that when the prism layer 235 is formed, a gap 24 can be formed, so that the light type of the light emitted by the light-emitting chip 232 can be adjusted through the gap 24, the symmetry is improved, the problems of astigmatism and crosstalk are improved, and the display effect is improved.

[0061] Specifically, the connection portion 235b and the raised portion 235a are defined for the convenience of explaining the design of each structure. It can be understood that the prism layer 235 is arranged on the entire surface, and there is no obvious boundary between the parts. The connection portion refers to the part between the two raised parts in the prism layer 235. Figure 4 For example, Figure 4 There may be no connecting portion, or the portion between two corresponding protrusions 235a may be defined as a connecting portion.

[0062] Specifically, compared with the current display device in which the portion of the common electrode layer between adjacent light-emitting chips is located under the light-emitting chip, and the gap between the light-emitting chips arranged obliquely is larger, resulting in a smaller depth-to-width ratio at the gap, and no gap can be formed; in the embodiment of the present application, by making the distance between the first horizontal portion 234a and the bottom surface of the light-emitting chip 232 larger than the distance between the third horizontal portion 234c and the bottom surface of the light-emitting chip 232, the distance between the second horizontal portion 234b and the bottom surface of the light-emitting chip 232 is larger than the distance between the third horizontal portion 234c and the bottom surface of the light-emitting chip 232, and the second horizontal portion 234b is arranged on the side of the third horizontal portion 234c away from the substrate 22, so that the depth-to-width ratio of a groove formed by the first horizontal portion 234a, the second horizontal portion 234b and the third horizontal portion 234c is larger, the prism layer 235 can form a gap 24 in this area, so that the light type of the light emitted by the light-emitting chip 232 can be adjusted through the gap 24, the symmetry is improved, the problems of astigmatism and crosstalk are improved, and the display effect is improved.

[0063] In some embodiments, Figure 5 , Figure 6 As shown, in the direction from the substrate 22 to the light-emitting layer 23, the distance H1 between the first horizontal portion 234a and the bottom surface of the light-emitting chip 232 is greater than the distance H2 between the second horizontal portion 234b and the bottom surface of the light-emitting chip 232, and the gap 24 is arc-shaped, and the gap 24 protrudes toward the light-emitting chip 232 along the area between the light-emitting chips 232. By making the distance between the first horizontal portion 234a and the bottom surface of the light-emitting chip 232 greater than the distance between the second horizontal portion 234b and the bottom surface of the light-emitting chip 232, the gap 24 is arc-shaped, and the gap 24 protrudes toward the light-emitting chip 232 along the area between the light-emitting chips 232, so that when the light is irradiated to the arc surface at the junction of the prism layer 235 and the gap 24, it can be reflected outside the prism layer 235, so that the light emitted by the light-emitting chip 232 is symmetrical, the problems of astigmatism and crosstalk are improved, and the display effect is improved.

[0064] In some embodiments, Figure 5 , Figure 6As shown, the gap 24 is provided at the junction of the protrusion 235a and the connection part 235b, and the gap 24 is bent from the protrusion 235a to the connection part 235b. By making the distance between the first horizontal part 234a and the bottom surface of the light emitting chip 232 greater than the distance between the second horizontal part 234b and the bottom surface of the light emitting chip 232, when forming the prism layer, the prism layer forms the gap 24 at the groove formed by the first horizontal part 234a and the second horizontal part 234b, and the light is reflected through the interface between the gap 24 and the prism layer 235, so that the light emitted by the light emitting chip 232 is symmetrical, the problems of astigmatism and crosstalk are improved, and the display effect is improved.

[0065] Specifically, the gap is provided between the first horizontal portion and the second horizontal portion.

[0066] Specifically, the spacing between the first horizontal portion 234a and the bottom surface of the light-emitting chip 232 is greater than the spacing between the second horizontal portion 234b and the bottom surface of the light-emitting chip 232, so that when the prism layer 235 is formed, the prism layer 235 can form a gap 24 protruding toward the light-emitting chip 232 along the area between the light-emitting chips 232, and reflect light through the interface between the gap 24 and the prism layer 235, so that the light emitted by the light-emitting chip 232 is symmetrical, thereby improving the problems of astigmatism and crosstalk and improving the display effect.

[0067] In some embodiments, Figure 7 , Figure 8 As shown, in the direction from the substrate to the light-emitting layer 23, the spacing H1 between the first horizontal portion 234a and the bottom surface of the light-emitting chip 232 is equal to the spacing H2 between the second horizontal portion 234b and the bottom surface of the light-emitting chip 232, and the gap 24 is a straight line. By making the spacing between the first horizontal portion 234a and the bottom surface of the light-emitting chip 232 equal to the spacing between the second horizontal portion 234b and the bottom surface of the light-emitting chip 232, and making the gap 24 a straight line, when the light is irradiated to the gap 24, the reflection angles of the light in the lateral reverse and oblique directions are equal, so that the light emitted by the light-emitting chip 232 is symmetrical, thereby improving the light, improving the problems of astigmatism and crosstalk, and improving the display effect.

[0068] Specifically, the spacing between the first horizontal portion 234a and the bottom surface of the light-emitting chip 232 is equal to the spacing between the second horizontal portion 234b and the bottom surface of the light-emitting chip 232, so that when the prism layer 235 is formed, the prism layer 235 can form a linear gap 24 along the direction from the prism layer 235 to the light-emitting chip 232, and reflect light through the interface between the gap 24 and the prism layer 235, so that the light emitted by the light-emitting chip 232 is symmetrical, thereby improving the problems of astigmatism and crosstalk and improving the display effect.

[0069] In some embodiments, Fig. 9 , Fig.10 As shown, in the direction from the substrate to the light-emitting layer 23, the spacing H1 between the first horizontal portion 234a and the bottom surface of the light-emitting chip 232 is smaller than the spacing H2 between the second horizontal portion 234b and the bottom surface of the light-emitting chip 232, and the gap 24 is arc-shaped, and the gap 24 protrudes along the light-emitting chip 232 to the area between the adjacent light-emitting chips 232. By making the spacing between the first horizontal portion 234a and the bottom surface of the light-emitting chip 232 smaller than the spacing between the second horizontal portion 234b and the bottom surface of the light-emitting chip 232, the gap 24 is arc-shaped, and the gap 24 protrudes along the light-emitting chip 232 to the area between the adjacent light-emitting chips 232, when the light is irradiated to the arc surface at the junction of the prism layer 235 and the gap 24, it is reflected outside the prism layer 235, so that the light emitted by the light-emitting chip 232 is symmetrical, the problems of astigmatism and crosstalk are improved, and the display effect is improved.

[0070] Specifically, by making the distance between the first horizontal portion 234a and the bottom surface of the light-emitting chip 232 smaller than the distance between the second horizontal portion 234b and the bottom surface of the light-emitting chip 232, when the prism layer 235 is formed, the prism layer 235 can form a gap 24 that protrudes along the light-emitting chip 232 toward the area between the light-emitting chips 232, and the light is reflected through the interface between the gap 24 and the prism layer 235, so that the light emitted by the light-emitting chip 232 is symmetrical, thereby improving the problems of astigmatism and crosstalk and improving the display effect.

[0071] In some embodiments, the light-emitting layer 23 further includes an independent electrode layer 231, and the independent electrode layer 231 is disposed on a side of the light-emitting chip 232 away from the common electrode layer 234. For a single light-emitting sub-pixel 21, when the independent electrode, the light-emitting chip 232 and the common electrode layer 234 are stacked, there will be a problem of display astigmatism due to different morphologies of prisms in different directions. The embodiment of the present application can solve the above technical problem by setting a gap.

[0072] In some embodiments, Figure 4 , Figure 5 , Figure 6 As shown, the light emitting chips 232 are arranged in an array along a first direction 201 and a second direction 202, and the micro light emitting diode display panel 2 further includes a third direction 203, the third direction 203 forms a first angle C with the first direction 201, and the third direction 203 forms a second angle D with the second direction 202, and the first angle C and the second angle D are both acute angles; the common electrode layer 234 covers the light emitting chips 232 and is arranged between adjacent light emitting chips 232;

[0073] The width of the third horizontal portion 234a of the common electrode layer 234 arranged along the first direction 201 is equal to the width of the third horizontal portion 234a of the common electrode layer 234 arranged along the third direction 203. By making the width of the third horizontal portion 234c of the common electrode layer 234 in the transverse direction equal to the width of the third horizontal portion 234c of the common electrode layer 234 in the oblique direction, and the interval between the first horizontal portion 234a and the third horizontal portion is constant, and the interval between the first horizontal portion 234a and the second horizontal portion 234b is constant, the length, width, thickness and angle of the gap 24 in the transverse direction and the gap 24 in the oblique direction are equal, so that when the light emitted by the light emitting chip 232 is irradiated to the interface between the gap 24 and the prism layer 235 and is reflected, each light is symmetrically arranged, thereby improving the problems of astigmatism and crosstalk and improving the display effect.

[0074] It should be noted that Figure 4 In the description, the horizontal direction is from left to right as an example, but the embodiment of the present application is not limited thereto. The horizontal direction may be from top to bottom, and the angle between the horizontal direction and the oblique direction is not limited to Figure 4 The angle may be between 0 and 90 degrees, excluding 0 and 90 degrees.

[0075] In some embodiments, Figure 4 , Figure 5 , Figure 6 As shown, the light-emitting chips 232 are arranged in an array along the first direction 201 and the second direction 202, and the micro-LED display panel 2 also includes a third direction 203, the third direction 203 forms a first angle C with the first direction 201, and the third direction 203 forms a second angle D with the second direction 202, and the first angle C and the second angle D are both acute angles; the common electrode layer 234 covers the light-emitting chips 232 and is arranged between adjacent light-emitting chips 232, the second horizontal portion 234b includes a first sub-portion 311 and a second sub-portion 312, the first sub-portion 311 is arranged along the first direction 201, and the second sub-portion 312 is arranged along the third direction 203, wherein the difference between the width D2 of the second sub-portion 312 and the width D1 of the first sub-portion 311 is equal to the spacing K3 between the adjacent protrusions 235a arranged along the third direction 203 and the spacing ( Figure 5By making the difference between the width of the second sub-portion and the width of the first sub-portion equal to the difference between the spacing between adjacent prism portions arranged in the oblique direction and the spacing between adjacent prism portions arranged in the transverse direction, the difference between the spacing K2 between adjacent gaps 24 in the oblique direction and the spacing K1 between adjacent gaps 24 in the transverse direction in the region between adjacent light-emitting chips 232 is equal to the difference between the spacing between adjacent prism portions 235a arranged in the oblique direction and the spacing between adjacent prism portions 235a arranged in the transverse direction, so that the gaps 24 in all directions are symmetrical about the center line 232a of the light-emitting chip 232, thereby making the light symmetrical, improving the problems of astigmatism and crosstalk, and improving the display effect.

[0076] Specifically, the spacing between the sub-pixels arranged horizontally is still different from the spacing between the sub-pixels arranged obliquely, but the gap 24 is made symmetrical about the light-emitting chip 232, so that the spacing between the light-emitting chip 232 and the gap 24 in each direction is equal, thereby improving the symmetry of the light, alleviating the problems of astigmatism and crosstalk, and improving the display effect.

[0077] In some embodiments, Figure 5 , Figure 6 As shown, there is a gap between the gap 24 and the upper surface of the prism layer 235, and there is a gap between the gap 24 and the upper surface of the common electrode layer 234. By making the gap between the gap 24 and the upper surface of the prism layer 235, and the gap between the gap 24 and the upper surface of the common electrode layer 234, water and oxygen are prevented from invading the light-emitting layer 23, the stability of the light-emitting layer 23 is improved, and the yield of the micro light-emitting diode display panel 2 is improved.

[0078] Specifically, when forming the gap 24, the prism layer 235 is formed on the common electrode layer 234, and the prism layer 235 fills the groove between the first horizontal portion 234a and the second horizontal portion 234b to form the gap 24, and the prism layer 235 covers the gap 24, so that the gap 24 does not contact the upper surface of the prism layer 235, and the gap 24 does not contact the upper surface of the common electrode layer 234, thereby preventing water and oxygen from invading the light-emitting layer 23, improving the stability of the light-emitting layer 23, and improving the yield of the micro light-emitting diode display panel 2.

[0079] In some embodiments, the refractive index of the prism layer 235 ranges from 1.4 to 2.5, so that the reflection angle of the light can be adjusted so that the light is emitted from the corresponding light emitting chip 232 to avoid light crosstalk.

[0080] Specifically, the angle of the light irradiated between the prism layer 235 and the gap 24 ranges from 23 degrees to 45 degrees.

[0081] Specifically, the substrate 22 includes silicon-based CMOS (Complementary Metal Oxide Semiconductor). The use of silicon-based CMOS reduces the power consumption of the display panel.

[0082] Specifically, Figure 5 As shown, the light emitting layer 23 further includes an interlayer insulating layer 233 .

[0083] In the above embodiments, the micro-LED display panel 2 is described from various structures. It is understandable that when there is no conflict between the embodiments, the embodiments can be combined to achieve better technical effects. For example, there is a gap between the gap 24 and the upper surface of the prism layer 235, there is a gap between the gap 24 and the upper surface of the common electrode layer 234, and the refractive index of the prism layer 235 ranges from 1.4 to 2.5.

[0084] Specifically, Fig.11 , Fig.12 As shown, in the coordinate axis xyz, the sub-pixel emits light from point O1, and each pair of light rays converges at different points on the principal light axis 44, and finally forms the best focusing positions on two planes: the tangential focal plane 42 and the sagittal focal plane 41. Fig.11 , Fig.12 The morphology of each direction of the lens 45 (shown in FIG. 1 ) is different, resulting in the light forming two separate and mutually perpendicular short lines after passing through the lens. After being integrated on the ideal plane, an elliptical spot 43 is formed, that is, the image points of the tangential focal plane 42 and the sagittal focal plane 41 do not overlap, resulting in different imaging at different axial positions, resulting in dispersion. In the embodiment of the present application, by setting a gap, the plane formed by the light emitted from point O1 and lens 45 is the meridian focal plane O1AB or the sagittal plane O1CD, so that the final image is O2, avoiding dispersion and improving the display effect.

[0085] Specifically, Fig.13 The display effect of the micro light emitting diode display panel provided in the embodiment of the present application is as follows: Fig.14 As for the display effect of the existing silicon-based micro-light emitting diode display device, it can be seen that the embodiment of the present application avoids dispersion and improves the display effect.

[0086] At the same time, an embodiment of the present application provides a method for preparing a micro light emitting diode display panel, and the method for preparing a micro light emitting diode display panel prepares the micro light emitting diode display panel as described in any of the above embodiments.

[0087] In some embodiments, the method for preparing the micro light emitting diode display panel includes:

[0088] Providing a substrate (the substrate is not shown in the drawings);

[0089] An independent electrode layer and a light-emitting chip are formed on the substrate; the structure of the micro light-emitting diode display panel corresponding to this step is as follows: Fig.15 As shown in (a);

[0090] An insulating layer is formed on the light-emitting chip; the structure of the micro light-emitting diode display panel corresponding to this step is as follows Fig.15 As shown in (b);

[0091] An inorganic layer 51 is formed on the insulating layer, and the inorganic layer 51 is patterned; the structure of the micro light emitting diode display panel corresponding to this step is as follows: Fig.15 As shown in (c);

[0092] A photoresist layer 52 is formed on the inorganic layer and the insulating layer, and the photoresist layer 52 is patterned; the structure of the micro light emitting diode display panel corresponding to this step is as follows: Fig.15 As shown in (d);

[0093] The insulating layer is etched for the first time to form a groove in the area not covered by the inorganic layer and the photoresist layer; the structure of the micro light emitting diode display panel corresponding to this step is as follows: Fig.15 As shown in (e);

[0094] Remove the photoresist layer; the structure of the micro light emitting diode display panel corresponding to this step is as follows Fig.16 As shown in (a);

[0095] The insulating layer is etched for a second time to remove the inorganic layer and make the height of the inorganic layer between adjacent light-emitting chips smaller than the height of the light-emitting chips; the structure of the micro light-emitting diode display panel corresponding to this step is as follows: Fig.16 As shown in (b);

[0096] A common electrode layer is formed on the insulating layer; the structure of the micro light emitting diode display panel corresponding to this step is as follows Fig.16 As shown in (c);

[0097] A prism layer is formed on the common electrode layer; the structure of the micro light emitting diode display panel corresponding to this step is as follows: Fig.16 As shown in (d) in .

[0098] The embodiment of the present application provides a method for preparing a micro-LED display panel. The micro-LED display panel prepared by the method for preparing a micro-LED display panel is provided with a gap surrounding a light-emitting chip in a prism layer so that the gap is axially symmetrical about the center line of the light-emitting chip. Then, the spacing between the light-emitting chip arranged horizontally and the gap is equal to the spacing between the light-emitting chip arranged obliquely and the gap. Moreover, the angle at which the light irradiated from the light-emitting chip arranged horizontally to the contact surface between the prism layer and the gap is reflected is equal to the angle at which the light irradiated from the light-emitting chip arranged obliquely to the contact surface between the prism layer and the gap is reflected. Therefore, the plane formed by the contact surface between the light-emitting chip and the prism layer and the gap is the same as the meridian focal plane or the sagittal plane, thereby improving the problem of third-order aberration, avoiding astigmatism, and avoiding light crosstalk between adjacent sub-pixels by reflecting light, thereby further improving the display effect.

[0099] At the same time, an embodiment of the present application provides a micro light emitting diode display device, which includes the micro light emitting diode display panel as described in any of the above embodiments.

[0100] According to the above embodiments, it can be seen that:

[0101] The embodiment of the present application provides a micro light emitting diode display panel and a micro light emitting diode display device; the micro light emitting diode display panel includes a substrate and a light emitting layer, the light emitting layer is arranged on one side of the substrate, the light emitting layer includes a light emitting chip and a prism layer, the prism layer is arranged on the side of the light emitting chip away from the substrate, wherein the prism layer is provided with a gap surrounding the light emitting chip, and the gap is arranged symmetrically about the center line of the light emitting chip. The present application arranges the gap surrounding the light emitting chip in the prism layer so that the gap is arranged symmetrically about the center line of the light emitting chip, then the spacing between the light emitting chip arranged horizontally and the gap is equal to the spacing between the light emitting chip arranged obliquely and the gap, and the angle at which the light emitting chip arranged horizontally irradiates the contact surface between the prism layer and the gap is reflected is equal to the angle at which the light emitting chip arranged obliquely irradiates the contact surface between the prism layer and the gap, so that the plane formed by the contact surface between the light emitting chip and the prism layer and the gap is the same as the meridional focal plane or the sagittal plane, thereby improving the problem of third-order aberration, avoiding astigmatism, and avoiding light crosstalk between adjacent sub-pixels by reflecting light, further improving the display effect.

[0102] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0103] The above is a detailed introduction to a micro-light emitting diode display panel and a micro-light emitting diode display device provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A micro light emitting diode display panel, characterized in that: include: substrate; A light-emitting layer is disposed on one side of the substrate, the light-emitting layer comprises a light-emitting chip and a prism layer, and the prism layer is disposed on a side of the light-emitting chip away from the substrate; The prism layer is provided with a gap surrounding the light-emitting chip, and the gap is arranged in an axisymmetric manner with respect to the center line of the light-emitting chip.

2. The micro light emitting diode display panel according to claim 1, characterized in that: The light-emitting layer further comprises a common electrode layer, and the common electrode layer is arranged between the light-emitting chip and the prism layer; The prism layer includes a protrusion and a connection portion, wherein the connection portion is located between adjacent protrusions, and a distance between the connection portion and the substrate is smaller than a distance between the protrusion and the substrate; Wherein, the common electrode layer includes a first horizontal portion arranged corresponding to the raised portion, a second horizontal portion arranged corresponding to the connecting portion, and a third horizontal portion located between the first horizontal portion and the second horizontal portion. In the direction from the substrate to the light-emitting layer, the distance between the first horizontal portion and the bottom surface of the light-emitting chip is greater than the distance between the third horizontal portion and the bottom surface of the light-emitting chip, the distance between the second horizontal portion and the bottom surface of the light-emitting chip is greater than the distance between the third horizontal portion and the bottom surface of the light-emitting chip, and the second horizontal portion is arranged on the side of the third horizontal portion away from the substrate.

3. The micro light emitting diode display panel according to claim 2, characterized in that: In the direction from the substrate to the light-emitting layer, the distance between the first horizontal part and the bottom surface of the light-emitting chip is greater than the distance between the second horizontal part and the bottom surface of the light-emitting chip, and the gap is arc-shaped, and the gap protrudes toward the light-emitting chip along the area between adjacent light-emitting chips.

4. The micro light emitting diode display panel according to claim 3, characterized in that: The gap is arranged at the junction of the protruding portion and the connecting portion, and the gap is bent from the protruding portion to the connecting portion.

5. The micro light emitting diode display panel according to claim 2, wherein: In the direction from the substrate to the light-emitting layer, the distance between the first horizontal portion and the bottom surface of the light-emitting chip is equal to the distance between the second horizontal portion and the bottom surface of the light-emitting chip, and the gap is a straight line.

6. The micro light emitting diode display panel according to claim 2, wherein: In the direction from the substrate to the light-emitting layer, the distance between the first horizontal part and the bottom surface of the light-emitting chip is smaller than the distance between the second horizontal part and the bottom surface of the light-emitting chip, and the gap is arc-shaped, and the gap protrudes along the light-emitting chip toward the area between adjacent light-emitting chips.

7. The micro light emitting diode display panel according to claim 2, wherein: The light-emitting layer further includes an independent electrode layer, and the independent electrode layer is arranged on a side of the light-emitting chip away from the common electrode layer.

8. The micro light emitting diode display panel according to any one of claims 3 to 7, characterized in that: The light-emitting chips are arranged in an array along a first direction and a second direction, and the micro-LED display panel further includes a third direction, the third direction forms a first angle with the first direction, the third direction forms a second angle with the second direction, and the first angle and the second angle are both acute angles; the common electrode layer covers the light-emitting chips and is arranged between adjacent light-emitting chips; Wherein, the width of the third horizontal portion of the common electrode layer arranged along the first direction is equal to the width of the third horizontal portion of the common electrode layer arranged along the third direction.

9. The micro light emitting diode display panel according to any one of claims 3 to 7, characterized in that: The light-emitting chips are arranged in an array along a first direction and a second direction, and the micro-LED display panel further includes a third direction, the third direction forms a first angle with the first direction, the third direction forms a second angle with the second direction, and the first angle and the second angle are both acute angles; the common electrode layer covers the light-emitting chips and is arranged between adjacent light-emitting chips, the second horizontal portion includes a first sub-portion and a second sub-portion, the first sub-portion is arranged along the first direction, and the second sub-portion is arranged along the third direction; The difference between the width of the second sub-portion and the width of the first sub-portion is equal to the difference between the spacing between adjacent protrusions arranged along the third direction and the spacing between adjacent protrusions arranged along the first direction.

10. The micro light emitting diode display panel according to any one of claims 3 to 7, characterized in that: There is a distance between the gap and the upper surface of the prism layer, and there is a distance between the gap and the upper surface of the common electrode layer.

11. The micro light emitting diode display panel according to claim 1, characterized in that: The refractive index of the prism layer ranges from 1.4 to 2.

5.

12. A micro light emitting diode display device, characterized in that: It comprises the micro light emitting diode display panel as claimed in any one of claims 1 to 11.

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