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

Abstract

The application provides a micro light emitting diode display panel and a micro light emitting diode display device; the micro light emitting diode display panel is characterized in that a gap surrounding a light emitting chip is arranged in an axisymmetric manner about the center line of the light emitting chip, so that the spacing between the transversely arranged light emitting chip and the gap is equal to the spacing between the obliquely arranged light emitting chip and the gap, and the angle at which the light emitted by the transversely arranged light emitting chip and incident on the contact surface between the prism layer and the gap is reflected is equal to the angle at which the light emitted by the obliquely arranged light emitting chip and incident on the contact surface between the prism layer and the gap is reflected, so that the plane formed by the light emitting chip and the contact surface between the prism layer and the gap is the same as the meridional focal plane or the sagittal plane, the problem of third-order aberration is improved, astigmatism is avoided, the light crosstalk between adjacent sub-pixels is avoided by reflecting the light, and the display effect is further improved.

Description

TECHNICAL FIELD

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

[0002] With the development of augmented reality (AR) technology and virtual reality (VR) technology, the micro display technology using silicon-based light emitting diodes is the best solution to improve the display effect. Specifically, the micro light emitting diode display device includes a light emitting chip and a prism, and the prism is arranged on the light emitting chip to control the light pattern of the light emitting chip. However, in the actual display process, it is found that the pitch of the horizontally arranged sub-pixel is different from the pitch of the obliquely arranged sub-pixel, which leads to different topographies of the prism in the horizontal direction and the oblique direction. The inclined surface formed by the light emitting chip and the prism is different from the meridional focal surface and the sagittal surface, which leads to third-order aberration, resulting in astigmatism during display, affecting the display effect, and the cross talk between the horizontal light of adjacent sub-pixels will cause chromatic aberration problem, further affecting the display effect.

[0003] Therefore, the existing silicon-based micro light emitting diode display device has the technical problem of poor display effect caused by different topographies of the prisms in different directions leading to display astigmatism. SUMMARY

[0004] 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 technical problem of poor display effect caused by different topographies of the prisms in different directions leading to display astigmatism in the existing silicon-based micro light emitting diode display device.

[0005] The embodiments of the present application provide a micro light emitting diode display panel, which comprises:

[0006] a substrate;

[0007] a light emitting layer arranged on one side of the substrate, the light emitting layer comprising a light emitting chip and a prism layer, the prism layer being arranged on a side of the light emitting chip away from the substrate;

[0008] wherein the prism layer is provided with a gap surrounding the light emitting chip, and the gap is arranged in axial symmetry about the center line of the light emitting chip.

[0009] In some embodiments, the light emitting layer further comprises a common electrode layer arranged between the light emitting chip and the prism layer.

[0010] The prism layer comprises a convex part and a connecting part, the connecting part is located between adjacent convex parts, and the spacing between the connecting part and the substrate is smaller than the spacing between the convex part and the substrate.

[0011] The common electrode layer comprises a first horizontal part corresponding to the convex part, a second horizontal part corresponding to the connecting part, and a third horizontal part between the first horizontal part and the second horizontal part, in the direction from the substrate to the light-emitting layer, the spacing between the first horizontal part and the bottom surface of the light-emitting chip is greater than the spacing between the third horizontal part and the bottom surface of the light-emitting chip, the spacing between the second horizontal part and the bottom surface of the light-emitting chip is greater than the spacing between the third horizontal part and the bottom surface of the light-emitting chip, and the second horizontal part is located on the side of the third horizontal part away from the substrate.

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

[0013] In some embodiments, the gap is provided at the junction of the convex part and the connecting part, and the gap is curved in the direction from the convex part to the connecting part.

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

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

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

[0017] In some embodiments, the light emitting chips are arranged along a first direction and a second direction, the micro light emitting diode display panel further comprises a third direction, the third direction forms a first included angle with the first direction, the third direction forms a second included angle with the second direction, the first included angle and the second included angle are acute angles; the common electrode layer covers the light emitting chips and is arranged between adjacent light emitting chips;

[0018] The width of the third horizontal part in the common electrode layer arranged along the first direction is equal to the width of the third horizontal part in the common electrode layer arranged along the third direction.

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

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

[0021] In some embodiments, the gap has a spacing from the upper surface of the prism layer, and the gap has a spacing from the 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] Meanwhile, the present application provides a micro light emitting diode display device, which comprises the micro light emitting diode display panel as described in any one of the above embodiments.

[0024] Beneficial effects: the application provides a micro light emitting diode display panel and a micro light emitting diode display device; the micro light emitting diode display panel comprises a substrate and a light emitting layer, the light emitting layer is arranged on one side of the substrate, the light emitting layer comprises 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 in axial symmetry about the center line of the light emitting chip. By arranging the gap surrounding the light emitting chip in the prism layer, the gap is arranged in axial symmetry about the center line of the light emitting chip, so that the distance between the transversely arranged light emitting chip and the gap is equal to the distance between the obliquely arranged light emitting chip and the gap, and the angle of the light reflected by the light emitted by the transversely arranged light emitting chip to the contact surface of the prism layer and the gap is equal to the angle of the light reflected by the light emitted by the obliquely arranged light emitting chip to the contact surface of the prism layer and the gap, so that the plane formed by the light emitting chip and the contact surface of the prism layer and the gap is the same as the meridional focal plane or the sagittal plane, the problem of third-order aberration is improved, the astigmatism is avoided, the light crosstalk between adjacent sub-pixels is avoided by reflecting the light, and the display effect is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] The technical solutions and other beneficial effects of the application will be apparent from the following detailed description of the specific embodiments of the application in conjunction with the accompanying drawings.

[0026] Figure 1 It is a schematic diagram of the existing silicon-based micro light emitting diode display device.

[0027] Figure 2 It is Figure 1 A1-A2 cross-sectional view of the existing silicon-based micro light emitting diode display device in

[0028] Figure 3 It is Figure 1 B1-B2 schematic diagram of the existing silicon-based micro light emitting diode display device in

[0029] Figure 4 It is a schematic diagram of the micro light emitting diode display panel provided by the embodiment of the application.

[0030] Figure 5 It is Figure 4 A1-A2 cross-sectional view of the micro light emitting diode display panel in

[0031] Figure 6 It is Figure 4 B1-B2 cross-sectional view of the micro light emitting diode display panel in

[0032] Figure 7 It is Figure 4 A1-A2 cross-sectional view of the micro light emitting diode display panel in

[0033] Figure 8 is a second B1-B2 cross-sectional view of the micro light emitting diode display panel in Figure 4

[0034] Figure 9 is a third A1-A2 cross-sectional view of the micro light emitting diode display panel in Figure 4

[0035] Figure 10 is a third B1-B2 cross-sectional view of the micro light emitting diode display panel in Figure 4

[0036] Figure 11 is a schematic diagram of an imaging principle of a prior art silicon-based micro light emitting diode display device.

[0037] Figure 12 is a schematic diagram of an imaging principle of a micro light emitting diode display panel provided by the embodiments of the present application.

[0038] Figure 13 is a display effect schematic diagram of a micro light emitting diode display panel provided by the embodiments of the present application.

[0039] Figure 14 is a display effect schematic diagram of a prior art silicon-based micro light emitting diode display device.

[0040] Figure 15 is a first structure schematic diagram of a micro light emitting diode display panel corresponding to each step of a preparation method of the micro light emitting diode display panel provided by the embodiments of the present application.

[0041] Figure 16 is a second structure schematic diagram of a micro light emitting diode display panel corresponding to each step of a preparation method of the micro light emitting diode display panel provided by the embodiments of the present application. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall 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 orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

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

[0046] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0047] Figure 1 Schematic diagram of an existing silicon-based micro light-emitting diode display device. Figure 2 for Figure 1 A1-A2 cross-sectional view of the 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, each sub-pixel 11 includes 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 is different from the morphology in the oblique direction (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 light is irradiated onto the prism 115, light from different directions is asymmetrically incident on the prism 115, causing the inclined surface 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. In addition, the crosstalk of lateral light between adjacent sub-pixels will cause chromatic aberration problems, further affecting the display effect. Specifically, as shown in FIG. Figure 2 and Figure 3 As shown, the same exit angle, first light 116 and second light 117, strike prisms 115 in different directions at different angles, resulting in different exit angles and astigmatism. Therefore, existing silicon-based micro-LED display devices suffer from the technical problem of display astigmatism caused by the different morphologies of prisms in different directions, resulting in poor display quality.

[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 4A1-A2 cross-sectional view of the first type of micro light emitting diode display panel in Figure 6 A1-A2 cross-sectional view of the first type of micro light emitting diode display panel in Figure 4 A1-A2 cross-sectional view of the first type of micro light emitting diode display panel in Figure 7 A1-A2 cross-sectional view of the first type of micro light emitting diode display panel in Figure 4 A1-A2 cross-sectional view of the second type of micro light emitting diode display panel in Figure 8 A1-A2 cross-sectional view of the second type of micro light emitting diode display panel in Figure 4 A1-A2 cross-sectional view of the second type of micro light emitting diode display panel in Figure 9 A1-A2 cross-sectional view of the second type of micro light emitting diode display panel in Figure 4 A1-A2 cross-sectional view of the third type of micro light emitting diode display panel in Figure 10 A1-A2 cross-sectional view of the third type of micro light emitting diode display panel in Figure 4 A1-A2 cross-sectional view of the third type of micro light emitting diode display panel in Figure 11 A1-A2 cross-sectional view of the third type of micro light emitting diode display panel in Figure 12 A1-A2 cross-sectional view of the third type of micro light emitting diode display panel in Figure 13 A1-A2 cross-sectional view of the third type of micro light emitting diode display panel in Figure 14 A1-A2 cross-sectional view of the third type of micro light emitting diode display panel in Figure 15 A1-A2 cross-sectional view of the third type of micro light emitting diode display panel in Figure 16 A1-A2 cross-sectional view of the third type of micro light emitting diode display panel in

[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 technical problems.

[0051] The embodiments of the present application provide a micro light emitting diode display panel, as shown in Figures 4 to 6 The micro light emitting diode display panel 2 comprises:

[0052] a substrate 22;

[0053] a light emitting layer 23 arranged on one side of the substrate 22, the light emitting layer 23 comprising a light emitting chip 232 and a prism layer 235 arranged on a side of the light emitting chip 232 away from the substrate 22;

[0054] wherein the prism layer 235 is provided with a gap 24 surrounding the light emitting chip 232, and the gap 24 is arranged in axial symmetry about a center line 232a of the light emitting chip 232.

[0055] The embodiment of the present application provides a micro light emitting diode display panel 2, the micro light emitting diode display panel 2 is by setting the gap 24 surrounding the light emitting chip 232 in the prism layer 235, the gap 24 is symmetrically arranged about the center line 232a of the light emitting chip 232, then the interval between the transversely arranged light emitting chip 232 and the gap 24 is equal to the interval between the obliquely arranged light emitting chip 232 and the gap 24, and the angle of the light reflected by the light emitted by the transversely arranged light emitting chip 232 to the contact surface of the prism layer 235 and the gap 24 is equal to the angle of the light reflected by the light emitted by the obliquely arranged light emitting chip 232 to the contact surface of the prism layer 235 and the gap 24, so that the plane formed by the light emitting chip 232 and the contact surface of the prism layer 235 and the gap 24 is the same as the meridional focal plane or the sagittal plane, the problem of third-order aberration is improved, the astigmatism is avoided, and the light crosstalk between adjacent sub-pixels is avoided by reflecting the light, and the display effect is further improved.

[0056] Specifically, since the gap 24 surrounding the light emitting chip 232 is arranged in the prism layer 235, the interval between the light emitting chip 232 and the gap 24 in the transverse direction is equal to the interval between the light emitting chip 232 and the gap 24 in the oblique direction, and the gap 24 is symmetric about the center line 232a of the light emitting chip 232, so that in the transverse direction, the angle of the light reflected by the light emitted by the light emitting chip 232 to the interface of the prism layer 235 and the gap 24 is equal to the angle of the light reflected by the light emitted by the light emitting chip 232 to the interface of the prism layer 235 and the gap 24 in the oblique direction, that is, the light can be symmetrically irradiated to the interface of the prism layer 235 and the gap 24, so that the light does not appear astigmatism when the light is emitted, the display effect is improved, and since the light is reflected at the interface of the prism layer 235 and the gap 24, the light crosstalk of the light emitted by the adjacent light emitting chip 232 can be avoided, the color difference can be avoided, and the display effect is further improved.

[0057] Specifically, the gap 24 is filled with air, and the refractive index of the prism layer 235 and the air is different, so that the light can be totally reflected when irradiating to the contact surface of the prism layer 235 and the gap 24, thereby adjusting the angle of the light emitted by the light emitting layer 23, symmetrically arranging the light emitted by the light emitting layer 23, modifying the light type, improving the problems of color dispersion and light crosstalk, and improving the display effect.

[0058] In some embodiments, as shown in Figure 5 , Figure 6 The light emitting layer 23 further comprises a common electrode layer 234, and the common electrode layer 234 is arranged between the light emitting chip 232 and the prism layer 235.

[0059] The prism layer 235 includes a convex part 235a and a connecting part 235b located between adjacent convex parts 235a, and the distance between the connecting part 235b and the substrate 22 is smaller than the distance between the convex part 235a and the substrate 22;

[0060] The common electrode layer 234 includes a first horizontal part 234a corresponding to the convex part 235a, a second horizontal part 234b corresponding to the connecting part 235b, and a third horizontal part 234c located between the first horizontal part 234a and the second horizontal part 234b, and the distance H1 between the first horizontal part 234a and the bottom surface of the light-emitting chip 232 is greater than the distance H3 between the third horizontal part 234c and the bottom surface of the light-emitting chip 232 in the direction from the substrate 22 to the light-emitting layer 23, the distance H2 between the second horizontal part 234b and the bottom surface of the light-emitting chip 232 is greater than the distance H3 between the third horizontal part 234c and the bottom surface of the light-emitting chip 232, and the second horizontal part 234b is located on the side of the third horizontal part 234c away from the substrate 22. 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 third horizontal part 234c and the bottom surface of the light-emitting chip 232, the distance between the second horizontal part 234b and the bottom surface of the light-emitting chip 232 is greater than the distance between the third horizontal part 234c and the bottom surface of the light-emitting chip 232, and the second horizontal part 234b is located on the side of the third horizontal part 234c away from the substrate 22, the first horizontal part 234a, the second horizontal part 234b and the third horizontal part 234c can form a groove region, so that when the prism layer 235 is formed, the gap 24 can be formed, thereby adjusting the light pattern of the light emitted by the light-emitting chip 232 through the gap 24, improving the symmetry, improving the problems of astigmatism and crosstalk, and improving the display effect.

[0061] Specifically, the connecting part 235b and the convex part 235a are defined for the convenience of explaining the design of each structure, and it can be understood that the prism layer 235 is provided on the whole surface, and there is no obvious boundary between each part. The connecting part refers to the part between the two convex parts of the prism layer 235, and Figure 4 For example, Figure 4 There can be no connecting part, or the part between the two convex parts 235a can be defined as a connecting part.

[0062] Specifically, compared with the current display device, the common electrode layer is located below the light-emitting chip between the adjacent light-emitting chips, and the gap between the obliquely arranged light-emitting chips is large, resulting in a small aspect ratio of the gap, which cannot form a gap; the embodiments of the present application make the distance between the first horizontal part 234a and the bottom surface of the light-emitting chip 232 greater than the distance between the third horizontal part 234c and the bottom surface of the light-emitting chip 232, the distance between the second horizontal part 234b and the bottom surface of the light-emitting chip 232 is greater than the distance between the third horizontal part 234c and the bottom surface of the light-emitting chip 232, and the second horizontal part 234b is arranged on the side of the third horizontal part 234c away from the substrate 22, so that the first horizontal part 234a, the second horizontal part 234b and the third horizontal part 234c form a groove with a large aspect ratio, and the prism layer 235 can form a gap 24 in the 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, as shown in Figure 5 , Figure 6 In the direction from the substrate 22 to the light-emitting layer 23, the distance H1 between the first horizontal part 234a and the bottom surface of the light-emitting chip 232 is greater than the distance H2 between the second horizontal part 234b and the bottom surface of the light-emitting chip 232, the gap 24 is arc-shaped, and the gap 24 protrudes towards the light-emitting chip 232 along the area between the light-emitting chips 232. 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, the gap 24 is arc-shaped, and the gap 24 protrudes towards the light-emitting chip 232 along the area between the light-emitting chips 232, so that when the light is incident on the arc surface at the junction of the prism layer 235 and the gap 24, it is reflected out of the prism layer 235, 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, as shown in Figure 5 , Figure 6As shown, the gap 24 is provided at the junction of the raised portion 235a and the connecting portion 235b, and the gap 24 curves from the raised portion 235a toward the connecting portion 235b. 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, when the prism layer is formed, the gap 24 is formed in the groove formed by the first horizontal portion 234a and the second horizontal portion 234b. The interface between the gap 24 and the prism layer 235 reflects light, making the light emitted by the light-emitting chip 232 symmetrical, improving the problems of astigmatism and crosstalk, and enhancing the display effect.

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

[0066] Specifically, the distance between the first horizontal portion 234a and the bottom surface of the light-emitting chip 232 is greater than the distance 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, as Figure 7 、 Figure 8 As shown, in the direction from the substrate 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 equal to the distance H2 between the second horizontal portion 234b and the bottom surface of the light-emitting chip 232, and the gap 24 is linear. By ensuring that the distance between the first horizontal portion 234a and the bottom surface of the light-emitting chip 232 is equal to the distance between the second horizontal portion 234b and the bottom surface of the light-emitting chip 232, and thus forming the gap 24 as a straight line, when light strikes the gap 24, the light is reflected at equal angles in the lateral reverse and oblique directions, resulting in symmetrical light emitted from the light-emitting chip 232. This improves the light distribution, alleviates astigmatism and crosstalk, and enhances the display effect.

[0068] Specifically, the distance between the first horizontal portion 234a and the bottom surface of the light-emitting chip 232 is equal to the distance 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, as shown in Figure 9 , In some embodiments, as shown in Figure 10 , In some embodiments, as shown in , In some embodiments, as shown in

[0070] , In some embodiments, as shown in , In some embodiments, as shown in

[0071] , In some embodiments, as shown in , In some embodiments, as shown in

[0072] , In some embodiments, as shown in Figure 4 , In some embodiments, as shown in Figure 5 , In some embodiments, as shown in Figure 6 , In some embodiments, as shown in , In some embodiments, as shown in

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

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

[0075] In some embodiments, as shown in Figure 4 、 Figure 5 、 Figure 6 The light-emitting chip 232 is arranged along the first direction 201 and the 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 included angle C with the first direction 201, and the third direction 203 forms a second included angle D with the second direction 202, and the first included angle C and the second included angle D are both acute angles; the common electrode layer 234 covers the light-emitting chip 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 adjacent protruding portions 235a arranged along the third direction 203 and the spacing K1 between adjacent protruding portions 235a arranged along the first direction 201 Figure 5The difference between the width of the second sub-portion and the width of the first sub-portion is equal to the difference between the interval between the adjacent prism portions arranged in the diagonal direction and the interval between the adjacent prism portions arranged in the horizontal direction. In the area between the adjacent light emitting chips 232, the difference between the interval K2 between the adjacent voids 24 arranged in the diagonal direction and the interval K1 between the adjacent voids 24 arranged in the horizontal direction is equal to the difference between the interval between the adjacent prism portions 235a arranged in the diagonal direction and the interval between the adjacent prism portions 235a arranged in the horizontal direction. The voids 24 in each direction are symmetrical about the center line 232a of the light emitting chip 232, so that the light is symmetrical, the problems of astigmatism and crosstalk are improved, and the display effect is improved.

[0076] Specifically, the interval between the sub-pixels arranged in the horizontal direction is still different from the interval between the sub-pixels arranged in the diagonal direction, but the voids 24 are symmetrical about the light emitting chip 232, so that the interval between the light emitting chip 232 and the voids 24 in each direction is equal, thereby improving the symmetry of the light, improving the problems of astigmatism and crosstalk, and improving the display effect.

[0077] In some embodiments, as shown in FIGS. 1A and 1B, the voids 24 are arranged in the diagonal direction and the horizontal direction, and the interval between the sub-pixels arranged in the diagonal direction is different from the interval between the sub-pixels arranged in the horizontal direction. Figure 5 、 Figure 6 In some embodiments, as shown in FIGS. 1A and 1B, the voids 24 are arranged in the diagonal direction and the horizontal direction, and the interval between the sub-pixels arranged in the diagonal direction is different from the interval between the sub-pixels arranged in the horizontal direction.

[0078] Specifically, when the voids 24 are formed, the prism layer 235 is formed on the common electrode layer 234, the prism layer 235 fills the groove between the first horizontal portion 234a and the second horizontal portion 234b and forms the voids 24, and the prism layer 235 covers the voids 24, so that the voids 24 are not in contact with the upper surface of the prism layer 235 and the voids 24 are not in contact with the upper surface of the common electrode layer 234, thereby avoiding 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, the light is emitted from the corresponding light emitting chip 232, and the light crosstalk is avoided.

[0080] Specifically, the angle range of the light between the prism layer 235 and the voids 24 is 23 degrees to 45 degrees.

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

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

[0083] The above embodiments illustrate the micro-LED display panel 2 from various perspectives. It is understood that, when there are no conflicts between the various embodiments, they can be combined to achieve better technical effects. For example, there is a distance between the gap 24 and the upper surface of the prism layer 235, there is a distance 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, such as Figure 11 、 Figure 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 ray axis 44, finally forming the best focus positions on two planes: the tangential focal plane 42 and the sagittal focal plane 41. Due to the prism ( Figure 11 、 Figure 12 The different morphologies of the lens (illustrated by lens 45 in the figure) in various directions cause light to form two separate, perpendicular short lines after passing through the lens. When combined on an ideal plane, this forms an elliptical spot 43. This means that the image points on the tangential focal plane 42 and the sagittal focal plane 41 do not overlap, resulting in different imaging at different axial positions and causing dispersion. In the present embodiment, however, a gap is provided so that the plane formed by the light emitted from point O1 and lens 45 forms the meridional focal plane O1AB or the sagittal plane O1CD, resulting in the final image O2, avoiding dispersion and improving the display quality.

[0085] Specifically, Figure 13 The display effect of the micro light emitting diode display panel provided in the embodiment of the present application is as follows: Figure 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-LED display panel, and the method for preparing a micro-LED display panel prepares the micro-LED display panel as described in any of the above embodiments.

[0087] In some embodiments, the method for preparing the micro-LED display panel includes:

[0088] A substrate (not shown in the drawings) is provided;

[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 shown in (a) of Figure 15 ;

[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 shown in (b) of Figure 15 ;

[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 shown in (c) of Figure 15 ;

[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 shown in (d) of Figure 15 ;

[0093] The insulating layer is etched for the first time, so that the area not covered by the inorganic layer and the photoresist layer forms a groove; the structure of the micro light emitting diode display panel corresponding to this step is shown in (e) of Figure 15 ;

[0094] The photoresist layer is removed; the structure of the micro light emitting diode display panel corresponding to this step is shown in (a) of Figure 16 ;

[0095] The insulating layer is etched for the second time to remove the inorganic layer, and the height of the inorganic layer between adjacent light emitting chips is less than the height of the light emitting chip; the structure of the micro light emitting diode display panel corresponding to this step is shown in (b) of Figure 16 ;

[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 shown in (c) of Figure 16 ;

[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 shown in (d) of Figure 16 .

[0098] The embodiment of the present application provides a preparation method of a micro light emitting diode display panel, the micro light emitting diode display panel prepared by the preparation method of the micro light emitting diode display panel is provided with a gap surrounding the light emitting chip in the prism layer, the gap is symmetrically arranged about the center line of the light emitting chip, the distance between the transversely arranged light emitting chip and the gap is equal to the distance between the obliquely arranged light emitting chip and the gap, the angle of the light reflected by the light emitted by the transversely arranged light emitting chip to the contact surface of the prism layer and the gap is equal to the angle of the light reflected by the light emitted by the obliquely arranged light emitting chip to the contact surface of the prism layer and the gap, the plane formed by the light emitting chip and the contact surface of the prism layer and the gap is the same as the meridional focal plane or the sagittal plane, the third-order aberration problem is improved, the astigmatism is avoided, the light crosstalk between adjacent sub-pixels is avoided by reflecting the light, and the display effect is further improved.

[0099] Meanwhile, the embodiment of the present application provides a micro light emitting diode display device, which comprises the micro light emitting diode display panel according to any one of the above-mentioned embodiments.

[0100] According to the above-mentioned embodiments, it is known 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 comprises a substrate and a light emitting layer, the light emitting layer is arranged on one side of the substrate, the light emitting layer comprises 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 symmetrically arranged about the center line of the light emitting chip. The gap surrounding the light emitting chip is arranged in the prism layer, the gap is symmetrically arranged about the center line of the light emitting chip, the distance between the transversely arranged light emitting chip and the gap is equal to the distance between the obliquely arranged light emitting chip and the gap, the angle of the light reflected by the light emitted by the transversely arranged light emitting chip to the contact surface of the prism layer and the gap is equal to the angle of the light reflected by the light emitted by the obliquely arranged light emitting chip to the contact surface of the prism layer and the gap, the plane formed by the light emitting chip and the contact surface of the prism layer and the gap is the same as the meridional focal plane or the sagittal plane, the third-order aberration problem is improved, the astigmatism is avoided, the light crosstalk between adjacent sub-pixels is avoided by reflecting the light, and the display effect is further improved.

[0102] In the above-mentioned embodiments, the description of each embodiment has its own emphasis, and the part not described in detail in an embodiment can be referred to the related description of other embodiments.

[0103] The micro light emitting diode display panel and the micro light emitting diode display device provided by the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The above embodiment description is only used to help understand the technical solutions of the present application and the core ideas thereof. It should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features thereof can be replaced by 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 disposed on one side of the substrate, the light-emitting layer comprising a light-emitting chip and a prism layer, the prism layer being 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 axially symmetrically with respect to the center line of the light-emitting chip; The light-emitting layer also includes a common electrode layer, which is arranged between the light-emitting chip and the prism layer; the prism layer includes a protrusion and a connecting portion, the connecting portion is located between adjacent protrusions, and the distance between the connecting portion and the substrate is smaller than the distance between the protrusion and the substrate; wherein, the common electrode layer includes a first horizontal portion arranged corresponding to the protrusion, 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.

2. The micro light emitting diode display panel according to claim 1, 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 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.

3. The micro light emitting diode display panel according to claim 2, wherein: The gap is provided at the junction of the protruding portion and the connecting portion, and the gap is bent from the protruding portion toward the connecting portion.

4. The micro light emitting diode display panel according to claim 1, wherein: In a 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.

5. The micro light emitting diode display panel according to claim 1, 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.

6. The micro light emitting diode display panel according to claim 1, 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.

7. The micro light emitting diode display panel according to any one of claims 2 to 6, wherein: 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, and 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 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.

8. The micro light emitting diode display panel according to any one of claims 2 to 6, wherein: 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, and 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, and 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.

9. The micro light emitting diode display panel according to any one of claims 2 to 6, wherein: 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.

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

5.

11. A micro light emitting diode display device, characterized in that: The invention comprises a micro light emitting diode display panel according to any one of claims 1 to 10.

Images