Display panel, manufacturing method thereof and display device

Abstract

The embodiment of the invention provides a display panel, a manufacturing method thereof and a display device, relates to the technical field of display, and aims to at least solve the problem of poor condensation effect of a light emitting structure in related technologies. The display panel comprises a driving substrate, light emitting units and light emitting structures, the light emitting units are arranged on the driving substrate and are mutually spaced, the light emitting structures cover the light emitting units, a gap is formed between every two adjacent light emitting structures, and each light emitting structure comprises a base part and an end part which are sequentially arranged in the height direction of the light emitting structure; the end portion is located on the side, away from the light-emitting unit, of the base portion, and the ratio of the sum of the height of the base portion and the height of the end portion to the width of the base portion is larger than or equal to 1.2.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a manufacturing method thereof, and a display device. Background Art

[0002] The display panel includes a light emitting unit and a light emitting structure covering the light emitting unit, and there is a gap between adjacent light emitting structures.

[0003] In the related art, during the formation of the light output structure, a light output structure layer is usually provided as a whole layer, and then a photoresist is provided on the light output structure layer, and then a photolithography process is performed to form a gap between adjacent light output structures, so that adjacent light output structures are separated from each other. However, after the light output structure is manufactured by the above method, it usually has a small height, which results in a relatively poor light focusing effect. Summary of the invention

[0004] The embodiments of the present application provide a display panel and a manufacturing method thereof, and a display device, which are used to at least solve the problem of poor light focusing effect of the light output structure in the related art.

[0005] On the one hand, an embodiment of the present application provides a display panel, which includes: a driving substrate, a light-emitting unit and a light-emitting structure, wherein the light-emitting units are arranged on the driving substrate and spaced apart from each other, the light-emitting structure covers the light-emitting units, and there is a gap between two adjacent light-emitting structures, and the light-emitting structure includes a base portion and an end portion arranged in sequence along its height direction, the end portion is located on a side of the base portion away from the light-emitting unit, and the ratio of the sum of the height of the base portion and the height of the end portion to the width of the base portion is greater than or equal to 1.2.

[0006] In some embodiments, a ratio of a sum of a height of the base portion and a height of the end portion to a width of the base portion is less than or equal to 6.

[0007] In some embodiments, the height of the base portion is equal to the height of the end portion.

[0008] In some embodiments, the sidewall of the base portion includes a first inclined surface, and the first inclined surface has a first slope. The sidewall of the end portion includes an arcuate surface, and along the direction of the end portion away from the base portion, the second slope of the tangent of the arcuate surface at different positions gradually decreases; or the sidewall of the end portion includes a second inclined surface, and the second inclined surface has a third slope, and the third slope is smaller than the first slope.

[0009] In some embodiments, the end portion is a portion of a sphere, and the axis of the sphere coincides with the central axis of the light-emitting unit.

[0010] In some embodiments, the end portion is a portion of an ellipsoid, and the major axis of the ellipsoid coincides with the central axis of the light-emitting unit.

[0011] In some embodiments, a ratio of a height of the light output structure to a width of the gap is greater than 6.

[0012] In some embodiments, a ratio of a height of the light output structure to a width of the gap is less than or equal to 12.

[0013] On the other hand, an embodiment of the present application further provides a display device, which includes the display panel as described in any of the above embodiments.

[0014] On the other hand, an embodiment of the present application also provides a method for manufacturing a display panel, which includes: manufacturing light-emitting units spaced apart from each other on a driving substrate; and manufacturing light-emitting structures on each of the light-emitting units, wherein a gap is provided between two adjacent light-emitting structures, and the light-emitting structure includes a base portion and an end portion sequentially arranged along its height direction, the end portion being located on a side of the base portion away from the light-emitting unit, and a ratio of a sum of a height of the base portion and a height of the end portion to a width of the base portion is greater than or equal to 1.2.

[0015] In some embodiments, the optical structure is fabricated on each of the light-emitting units, including: setting a base material layer on the side of the light-emitting unit away from the driving substrate; opening a first groove on the base material layer by a photolithography process to form a base portion; setting an end material layer on the side of the base portion away from the driving substrate; opening a second groove on the end material layer by a photolithography process to form an initial end; setting a photoresist on the side of the initial end away from the driving substrate; performing thermal reflow after exposing and developing the photoresist, so that the remaining photoresist includes an arc-shaped side, and along the direction of the initial end away from the driving substrate, the fourth slope of the tangent of the arc-shaped side at different positions gradually decreases; and, transferring the shape of the remaining photoresist to the initial end by an etching process to form the end.

[0016] For the display panel provided in the embodiment of the present application, since its light-emitting structure includes a base portion and an end portion, the base portion and the end portion can be manufactured separately, so that the height of the light-emitting structure can be effectively increased. By setting the ratio of the sum of the height of the base portion and the height of the end portion to the width of the base portion to be greater than or equal to 1.2, the height of the light-emitting structure can be relatively high, which is conducive to focusing the light of the light-emitting unit toward the central axis, thereby improving its focusing effect and improving the contrast of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1is a structural diagram of a display panel provided in some embodiments of the present application;

[0018] Figure 2 is a structural diagram of a display panel provided in some other embodiments of the present application;

[0019] Figure 3 is a structural diagram of a display panel provided by some other embodiments of the present application;

[0020] Figure 4 is a structural diagram of a display device provided in some embodiments of the present application;

[0021] Figure 5 is a manufacturing flow chart of a display panel provided in some embodiments of the present application;

[0022] Figures 6 to 13 It is a production step diagram of step S20 in some embodiments of the present application. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. The described technical solutions are only used to explain and illustrate the ideas of the present application and should not be regarded as limiting the scope of protection of the present application.

[0024] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" 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", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different technical features. The term "multiple" and similar words mean two or more, unless otherwise expressly defined.

[0025] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0026] The use of "suitable for" or "configured to" in this application is meant to be open and inclusive language, which does not exclude devices that are suitable for or configured to perform additional tasks or steps. In addition, the use of "based on" is meant to be open and inclusive, because the process, step, calculation or other action "based on" one or more stated conditions or values ​​can be based on additional conditions or values ​​beyond the stated values ​​in practice.

[0027] In this application, the word "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present application.

[0028] The various embodiments of the present application are similar, and features in different embodiments and / or different examples may be combined with each other.

[0029] Some embodiments of the present application provide a display panel, such as Figure 1 and Figure 2 As shown, the display panel 100 includes a driving substrate 10, light emitting units 20 disposed on the driving substrate 10 and spaced from each other, and a light emitting structure 30 covering each light emitting unit 20, and a gap K is provided between two adjacent light emitting structures 30. Each light emitting unit 20 and the light emitting structure 30 corresponding thereto can serve as a pixel, and by providing the gap K between the light emitting structures 30, interference between light emitted by two adjacent pixels can be reduced.

[0030] The light emitting structure 30 includes a base portion 31 and an end portion 32 which are sequentially arranged along the height direction thereof. The end portion 32 is located at a side of the base portion 31 which is away from the light emitting unit 20 .

[0031] In this embodiment, the ratio of the sum of the height D1 of the base portion 31 and the height D2 of the end portion 32 to the width D3 of the base portion 31 is greater than or equal to 1.2. In other words, (D1+D2) / D3≥1.2. The sum of the height D1 of the base portion 31 and the height D2 of the end portion 32 is the height of the light output structure 30, and the width D3 of the base portion 31 is the width of the light output structure 30.

[0032] For the display panel provided in the embodiment of the present application, since the light emitting structure 30 includes a base portion 31 and an end portion 32, the base portion 31 and the end portion 32 can be manufactured separately, so that the height of the light emitting structure 30 can be effectively increased. By setting the ratio of the height to the width of the light emitting structure 30 to be greater than or equal to 1.2, the height of the light emitting structure 30 can be relatively high, which is conducive to focusing the light toward the central axis P of the light emitting unit 20, thereby improving the focusing effect and improving the contrast of the display panel 100.

[0033] It is worth noting that the height D1 of the base portion 31 refers to the height of the base portion 31 along the central axis P of the light emitting unit 20 , and the height D2 of the end portion 32 refers to the height of the end portion 32 along the central axis P of the light emitting unit 20 .

[0034] In some examples, the central axis P of the light emitting unit 20 coincides with the central axis of the light emitting structure 30 .

[0035] In some embodiments, Figure 1 and Figure 2 As shown, the side wall 311 of the base portion 31 includes a first inclined surface, and the first inclined surface has a first slope. In this case, a section is made along the height direction of the light output structure 30, and the side wall of the base portion 31 is a straight line on the section. The first slope of the first inclined surface is the slope of the straight line. The side wall of the base portion 31 can be the same as or similar to the side wall of the truncated cone structure; or, the side wall of the base portion 31 can be the same as or similar to the side wall of the prism structure.

[0036] In some examples, such as Figure 1 As shown, the side wall 321 of the end portion 32 includes an arcuate surface, and the second slope of the tangent line of the arcuate surface at different positions gradually decreases along the direction in which the end portion 32 departs from the base portion 31. For example, along the direction in which the end portion 32 departs from the base portion 31, the arcuate surface has a first position Q1 and a second position Q2 arranged in sequence, and the slopes of the tangent lines of the arcuate surface at the first position Q1 and the second position Q2 are α1 and α2, respectively, and α1>α2.

[0037] At this time, a section is made along the height direction of the light emitting structure 30, and the side wall 321 of the end 32 is curved on the section. For example, the end 32 is a part of a sphere, or the end 32 is a part of an ellipsoid. Based on this, the second slope can be the slope of the tangent line of the side wall of the end 32 at any position, which represents the slope of the tangent line to the horizontal line ( Figure 1 The angle between the first position Q1 and the second position Q2 is the dotted line (the dotted line is the horizontal line).

[0038] When the end portion 32 is a part of a sphere, the axis of the sphere coincides with the central axis P of the light emitting unit 20. The axis of the sphere is a straight line passing through the center of the sphere. For example, the structure of the end portion 32 can be a hemisphere, a third of a sphere, etc., that is, the end portion 32 can be extended to form a sphere.

[0039] When the end portion 32 is a part of an ellipsoid, the main axis of the ellipsoid coincides with the central axis P of the light emitting unit 20. The main axis of the ellipsoid may be a major axis or a minor axis. For example, the structure of the end portion 32 may be a semi-ellipsoid, a third of an ellipsoid, etc., that is, the end portion 32 may be extended to form an ellipsoid.

[0040] It is worth noting that in the related art, during the formation process of the light-emitting structure, a light-emitting structure layer is usually set as a whole layer, and then a photoresist is set on the light-emitting structure layer, and then a photolithography process is used to form a gap between adjacent light-emitting structures, so that adjacent light-emitting structures are separated from each other. However, the light-emitting structure layer is limited by the material properties of the photoresist layer during the etching process, resulting in the greater the etching depth of the light-emitting structure layer, the greater the gap between the two light-emitting structures. For example, when the height of the light-emitting structure is 6μm, the use of conventional photoresist will make the gap between the two light-emitting structures 1μm; and when the height of the light-emitting structure is 12μm, the use of conventional photoresist will cause the gap between the two light-emitting structures to reach 2μm. Since the height of the light-emitting structure has a great influence on the light-emitting effect of the light-emitting unit, when the light-emitting structure is set to a greater height, the use of conventional photoresist for the photolithography process will make the gap between the two adjacent light-emitting structures larger, which will result in a reduction in the number of light-emitting units arranged on the display panel, thereby affecting the light-emitting brightness of the display panel.

[0041] As for the display panel provided in the embodiment of the present application, since the side wall 311 of the base portion 31 includes a first inclined surface, and the side wall 321 of the end portion 32 includes an arcuate surface, the end portion 32 and the base portion 31 are manufactured through different steps. Since the end portion 32 and the base portion 31 are manufactured through different steps, a groove can be etched first when the base portion 31 is manufactured, and then when the end portion 32 is manufactured, the material forming the end portion 32 is laid in a whole layer to form an end material layer, and the end material layer is partially filled in the groove; during the manufacturing process of the end portion 32, the end material layer is etched away in the portion located in the groove. Therefore, subject to the material property limitation of the photoresist layer, the width of the groove etched by the base portion 31 during the manufacturing process is the first width, and the width of the groove etched by the end portion 32 during the manufacturing process is the second width, and the width of the gap between the two light-emitting structures 30 is the larger of the first width and the second width, thereby avoiding the situation where the width of the gap between the two light-emitting structures 30 is the sum of the first width and the second width due to direct etching of the grooves through a single etching process. Therefore, the gap K between two adjacent light-emitting structures 30 in the above embodiment of the present application can be effectively reduced, which is beneficial to improving the density of pixels, so as to improve the luminous brightness of the display panel 100.

[0042] In addition, since the side wall 321 of the end portion 32 includes an arc surface, and the second slope of the tangent line of the arc surface at different positions gradually decreases, the end portion 32 can be manufactured by a thermal reflow process, which will be described in detail later and will not be introduced here.

[0043] In other examples, such as Figure 2As shown, the side wall 321 of the end 32 includes a second inclined surface, and the second inclined surface has a third slope. In this case, a section is made along the height direction of the light output structure 30, and the side wall 321 of the end 32 is a straight line on the section. The third slope of the second inclined surface is the slope of the straight line. The side wall of the end 32 can be the same as or similar to the side wall of the truncated cone structure; or, the side wall of the end 32 can be the same as or similar to the side wall of the conical structure; or, the side wall of the end 32 can be the same as or similar to the side wall of the prism structure; or, the side wall of the end 32 can be the same as or similar to the side wall of the pyramid structure. When the side wall of the end 32 is the same as or similar to the side wall of the conical structure or the pyramid structure, the end of the end 32 away from the base 31 is a pointed tip; and when the side wall of the end 32 is the same as or similar to the side wall of the truncated cone structure or the prism structure, the end of the end 32 away from the base 31 is a plane, and the plane can be a flat or uneven surface.

[0044] Among them, the third slope is smaller than the first slope, that is, the end portion 32 and the base portion 31 are manufactured through different steps. Since the end portion 32 and the base portion 31 are manufactured through different steps, a groove can be etched out first when the base portion 31 is manufactured, and then when the end portion 32 is manufactured, the material forming the end portion 32 is laid in a whole layer to form an end material layer, and the end material layer is partially filled in the groove; during the manufacturing process of the end portion 32, the portion of the end material layer located in the groove is etched away. Therefore, subject to the material property limitation of the photoresist layer, the groove width etched out of the base portion 31 during the manufacturing process is the first width, and the groove width etched out of the end portion 32 during the manufacturing process is the second width, and the width of the gap between the two light-emitting structures 30 is the larger of the first width and the second width, thereby avoiding the situation that the groove is directly etched through a single etching process, resulting in the width of the gap between the two light-emitting structures 30 being the sum of the first width and the second width. Therefore, in the above embodiment of the present application, the width of the gap between two adjacent light output structures 30 can be effectively reduced, which is beneficial to improving the light emitting brightness of the display panel 100 .

[0045] Since the end portion 32 may be in a truncated cone, a conical structure, a prism structure or a pyramidal structure, etc., it may be manufactured using a grayscale exposure process.

[0046] In some examples, the material of the base 31 and the material of the end 32 can be the same, so that when the light passes through the base 31 and enters the end 32, it will not be deflected, which is conducive to improving the light gathering effect of the light emitting structure 30 on the light and improving the luminous efficiency. For example, the material of the base 31 and the material of the end 32 can both be silicon dioxide.

[0047] In other examples, the material of the base portion 31 and the material of the end portion 32 may be different, so that the light output of the light emitting unit 20 may be flexibly adjusted by utilizing the interface between the base portion 31 and the end portion 32 .

[0048] In some examples, the projection of the end 32 on the base 31 is within the range of the base 31. For example, the side of the end 32 close to the base 31 falls within the range of the side of the base 31 close to the end 32, which is conducive to the production of the end 32.

[0049] As an example, Figure 1 and Figure 2 As shown, the width of the end portion 32 close to the base portion 31 is greater than the width of the end portion 32 away from the base portion 31. In this case, the width of the end portion 32 gradually decreases in the direction in which the end portion 32 is away from the light emitting unit 20, which is conducive to focusing the divergent light emitted by the light emitting unit 20 toward the central axis P of the light emitting unit 20, thereby achieving a focusing effect.

[0050] In some embodiments, the ratio of the sum of the height D1 of the base portion 31 and the height D2 of the end portion 32 to the width D3 of the base portion 31 is less than or equal to 6. By limiting the ratio of the height to the width of the light output structure 30 to the above range, the difficulty of manufacturing the light output structure 30 can be effectively reduced.

[0051] In some embodiments, the height D1 of the base portion 31 is equal to the height D2 of the end portion 32 .

[0052] In this case, during the manufacturing process of the base portion 31, due to the material property limitations of the photoresist layer, after the base material layer used to form the base portion 31 is etched, the groove between two adjacent base portions 31 has a first width. During the manufacturing process of the end portion 32, part of the end material layer used to form the end portion 32 is filled in the groove, and this part of the end material layer is subsequently etched to a second width. Since the height D1 of the base portion 31 is equal to the height D2 of the end portion 32, the first width and the second width are equal. This is conducive to minimizing the gap K between two adjacent light-emitting structures 30, thereby further increasing the density of pixels to increase the luminous brightness of the display panel 100.

[0053] In some embodiments, Figure 1 and Figure 2 As shown, the side wall 321 of the end portion 32 is connected to the side wall 311 of the base portion 31. That is, the side wall 321 of the end portion 32 and the side wall 311 of the base portion 31 are directly transitionally connected, which is conducive to improving the smoothness of the junction between the end portion 32 and the base portion 31, thereby improving the focusing effect of the light-emitting structure 30 on the light-emitting unit 20.

[0054] In other embodiments, Figure 3 As shown, there is a step 301 between the end portion 32 and the base portion 31 .

[0055] Since the end 32 needs to adapt its shape requirements during the manufacturing process (i.e., the side wall of the end 32 includes a curved surface or a second inclined surface), the edge below the end 32 does not fit the edge above the base 31, thereby forming a step 301 between the end 32 and the base 31.

[0056] In some examples, such as Figure 3 As shown, along the second direction Y, the size of the end portion 32 is smaller than the size of the base portion 31 , wherein the second direction Y is perpendicular to the height direction of the light emitting structure 30 (ie, the first direction X). In this case, there is a step 301 between the end portion 32 and the base portion 31 for transition.

[0057] In other examples, along the second direction Y, the size of the end portion 32 is larger than the size of the base portion 31 , wherein the second direction Y is perpendicular to the height direction of the light output structure 30 (i.e., the first direction X). In this case, there is a step 301 between the end portion 32 and the base portion 31 for transition.

[0058] In some examples, the step 301 surrounds the circumference of the base portion 31 , which is helpful to improve the symmetry of the light-emitting structure 30 and enhance its light-gathering effect on the light-emitting unit 20 .

[0059] In some embodiments, the ratio of the height of the light output structure 30 (ie, the sum of the height D1 of the base portion 31 and the height D2 of the end portion 32 ) to the width of the gap K is greater than 6.

[0060] The gap K is formed by etching the base material layer corresponding to the base portion 31, and the bottom size of the gap K is usually smaller than the size of its opening. In the embodiment of the present application, the width of the gap K refers to the size of the bottom of the gap K in the second direction Y.

[0061] In the related art, when etching the gap between the light-emitting structures, the traditional photoresist has a depth-to-width ratio of only 6: 1. In this case, when the height of the light-emitting structure is 12 μm, the width of the gap will reach 2 μm, which will reduce the density of the light-emitting units on the display panel, thereby reducing the brightness of the display panel.

[0062] In the present application, the ratio of the height of the light emitting structure 30 to the width of the gap K is greater than 6. In this way, when manufacturing a light emitting structure with a height of 12 μm, the width of the gap K can be made less than 2 μm, thereby effectively ensuring the density of the light emitting unit 20 on the display panel 100, and further ensuring that the display panel 100 has a better light emitting brightness.

[0063] In some embodiments, a ratio of the height of the light output structure 30 to the width of the gap K is less than or equal to 12.

[0064] Since the light output structure 30 in the present application is divided into a base portion 31 and an end portion 32 and are manufactured separately, the width of the gap K can be effectively reduced. According to the above method, the light output structure 30 can also be divided into a first base portion, a second base portion and an end portion 32 along its height direction and are manufactured separately, which can further reduce the width of the gap K. However, with the increase of the above-mentioned manufacturing steps, the manufacturing cost of the display panel 100 will increase. Therefore, the present application sets the ratio of the height of the light output structure 30 to the width of the gap K to be less than or equal to 12, which also means that the light output structure 30 is only divided into a base portion 31 and an end portion 32 and are manufactured separately, which is conducive to reducing the manufacturing cost of the display panel 100.

[0065] For example, when the height D1 of the base portion 31 and the height D2 of the end portion 32 are the same, the ratio of the height of the light output structure 30 to the width of the gap K is equal to 12.

[0066] In some embodiments, Figures 1 to 3 As shown, the driving substrate 10 may include a driving circuit electrically connected to the light emitting unit 20 to drive the light emitting unit 20 to emit light. For example, the driving substrate 10 may include a CMOS integrated circuit.

[0067] In some examples, the light-emitting unit 20 may be a Micro LED. For example, the light-emitting unit 20 may include a first electrode 21, a compound pixel 22, and a second electrode 24 that are sequentially arranged in a direction away from the driving substrate 10. The second electrodes 24 of the plurality of light-emitting units 20 may be connected to each other to form a metal layer to synchronously input voltage. The compound pixel 22 may emit light under the drive of the voltage passed through the first electrode 21 and the second electrode 24.

[0068] In some examples, the first electrode 21 and the second electrode 24 may be made of a transparent conductive material, for example, the transparent conductive material may be a combination of one or more of ITO (Indium Tin Oxide), AZO (Antimony doped Zinc Oxide), and ATO (Antimony doped Tin Oxide).

[0069] In the case where the light emitting unit 20 includes a red light emitting unit, a green light emitting unit and a blue light emitting unit, the display panel 100 can emit colored light, and thus can be used for displaying color images.

[0070] In some examples, an insulating portion 23 is provided between two adjacent light-emitting units 20 . The insulating portion 23 is located between the compound pixel 22 and the second electrode 24 and surrounds the side walls of the compound pixel 22 and the first electrode 21 , thereby avoiding a short circuit between the first electrode 21 and the second electrode 24 of the light-emitting unit 20 .

[0071] In some examples, a passivation layer 11 and a bonding metal layer may be sequentially disposed on the driving substrate 10, and the bonding metal layer includes a plurality of bonding metal parts spaced apart from each other, and adjacent bonding metal parts are insulated and spaced apart by an insulating part 23. A via is provided in the passivation layer 11, and the first electrode 21 in the light-emitting unit 20 is electrically connected to the bonding metal part, and the bonding metal part is electrically connected to the driving circuit in the driving substrate 10 through the via. For example, the bonding metal layer includes a first bonding metal layer 12 and a second bonding metal layer 13 disposed along its thickness direction and electrically connected to each other, the bonding metal part in the first bonding metal layer 12 is electrically connected to the driving circuit through the via, and the bonding metal part in the second bonding metal layer 13 is electrically connected to the corresponding first electrode 21, thereby realizing signal transmission.

[0072] Some embodiments of the present application also provide a display device, such as Figure 4 As shown, the display device 200 includes a display panel 100 .

[0073] Since the display device 200 includes the display panel 100 , it has all the technical effects of the display panel 100 , which will not be described in detail here.

[0074] The display panel 100 of this embodiment can be applied to display or lighting. More specifically, the display device 200 can be a display device, and accordingly, the display panel 100 can be used as a backlight module or directly as a display panel. Alternatively, the display device can be a lighting device, and accordingly, the display panel 100 is used for lighting.

[0075] For example, the display device 200 may be an AR device or a VR device. Since the light emitting unit 20 in the display panel 100 has a high density, it has high pixel definition and high brightness, thereby providing a realistic display effect for the AR device or the VR device, thereby improving the user experience.

[0076] In some examples, the display device 200 further includes a fixing member 101 , and the fixing member 101 can be used to fix the display panel 100 to adapt to different usage purposes.

[0077] Some embodiments of the present application provide a method for manufacturing a display panel, such as Figure 5 As shown, the method includes steps S10 to S20.

[0078] S10 : manufacturing the light emitting unit 20 on the driving substrate 10 .

[0079] S20: A light emitting structure 30 is manufactured on each light emitting unit 20, wherein a gap K is provided between two adjacent light emitting structures 30, and the light emitting structure 30 comprises a base portion 31 and an end portion 32 which are sequentially arranged along a height direction thereof, and the end portion 32 is located on a side of the base portion 31 which is away from the light emitting unit 20, and a ratio of a sum of a height of the base portion 31 and a height of the end portion 32 to a width of the base portion 31 is greater than or equal to 1.2.

[0080] In this case, the end portion 32 and the base portion 31 can be manufactured through different steps, so that the height of the light-emitting structure 30 can be effectively increased. By setting the ratio of the sum of the height of the base portion 31 and the height of the end portion 32 to the width of the base portion 31 to be greater than or equal to 1.2, the height of the light-emitting structure 30 can be relatively high, which is conducive to focusing the light of the light-emitting unit 20 toward the central axis, thereby improving its focusing effect and improving the contrast of the display panel 100.

[0081] In some embodiments, the side wall of the base portion 31 includes a first inclined surface having a first slope, and the side wall 321 of the end portion 32 includes an arcuate surface, and the second slope of the tangent line of the arcuate surface at different positions gradually decreases along the direction of the end portion 32 away from the base portion 31. In this case, step S20 includes steps S201 to S207.

[0082] S201: Figure 6 As shown, a base material layer 31 ′ is disposed on the side of the light emitting unit 20 away from the driving substrate 10 .

[0083] S202: Figures 7 to 9 As shown, a first groove K1 is provided on the base material layer 31 ′ by a photolithography process to form the base portion 31 .

[0084] Specifically, Figure 7 As shown, the first photoresist may be coated on the base material layer 31' first, and then the first photoresist may be exposed using a first mask; Figure 8 As shown, the first photoresist is developed so that the exposed photoresist is washed away; as shown Fig. 9 As shown, the base material layer 31 ′ not covered by the first photoresist is etched, and the etched portion of the base material layer 31 ′ forms a first groove K1 , while the remaining portion of the base material layer 31 ′ is the base portion 31 .

[0085] S203: Fig.10 As shown, an end material layer 32 ′ is disposed on the side of the base portion 31 facing away from the drive substrate 10 .

[0086] S204: Figure 11 to Figure 12As shown, a second groove K2 is provided on the terminal material layer 32 ′ by a photolithography process to form an initial terminal 320 .

[0087] Specifically, Fig.11 As shown, the second photoresist 42 can be first coated on the end material layer 32', and then the second photoresist is exposed using a second mask; then the second photoresist is developed so that the exposed photoresist is washed away; as shown in FIG. Fig.12 As shown, the end material layer 32' not covered by the second photoresist is etched, and the etched portion of the end material layer 32' forms a second groove K2, while the retained portion of the end material layer 32' is the initial end 320. The second groove K2 and the first groove K1 together form a gap between two adjacent light output structures.

[0088] In some examples, the coverage area of ​​the second mask may be smaller than the top surface area of ​​the portion of the second photoresist 42 located above the base portion 31. In this case, the upper portion of the initial end portion 320 is relatively protruding, which is beneficial to the subsequent manufacturing of the end portion 32.

[0089] S205: Fig.13 As shown, a third photoresist 43 is disposed on a side of the initial end portion 320 away from the driving substrate 10 .

[0090] It is worth noting that materials with relatively large aspect ratios can be selected for the first to third photoresists 41 to 43 , and the thickness of the photoresists can be determined according to the material of the light output structure and the etching rate of the photoresist material.

[0091] S206 : performing thermal reflow after exposing and developing the third photoresist 43 , so that the remaining third photoresist includes an arc-shaped side surface, and a fourth slope of a tangent line of the arc-shaped side surface at different positions gradually decreases along a direction of the initial end portion 320 away from the drive substrate 10 .

[0092] Through the thermal reflow process, the structure of the remaining third photoresist can be made into a part of an ellipsoid or a sphere. The process steps of the thermal reflow can be operated with reference to the existing technology, and will not be described in detail here.

[0093] S207: Figure 3 As shown, the shape of the remaining photoresist is transferred to the initial end portion 320 through an etching process to form the end portion 32 .

[0094] Through the above process, the end portion 32 and the base portion 31 can be manufactured in different steps, so that the gap K between two adjacent light-emitting structures 30 can be effectively reduced, thereby facilitating the increase of pixel density and the brightness of the display panel 100 .

[0095] In some other embodiments, the sidewall of the base portion 31 includes a first inclined surface having a first slope, and the sidewall of the end portion 32 includes a second inclined surface having a third slope, and the third slope is smaller than the first slope.

[0096] In this case, the end portion 32 and the base portion 31 can also be manufactured through different steps, so that the gap K between two adjacent light output structures 30 can be effectively reduced, which is beneficial to improving the pixel density and thus improving the luminous brightness of the display panel 100 .

[0097] For the manufacturing method of the end portion 32 and the base portion 31, the specific operations can refer to steps S201-S207. Since the shape of the end portion 32 in this embodiment is different from that of the end portion 32 in the previous embodiment, it is necessary to replace the thermal reflow process in the previous embodiment with a process such as grayscale exposure, so as to form the end portion 32 including the second inclined surface. For the grayscale exposure process steps, the operation can be performed with reference to the existing related technology, and will not be repeated here.

[0098] The embodiments of the present application are introduced in detail above. 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 method and core idea of ​​the present application. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A display panel, characterized in that: include: Driver substrate; Light-emitting units disposed on the driving substrate and spaced apart from each other; as well as A light emitting structure covering each of the light emitting units, with a gap between two adjacent light emitting structures, the light emitting structure comprising a base portion and an end portion sequentially arranged along a height direction thereof, the end portion being located on a side of the base portion away from the light emitting unit, and a ratio of a sum of a height of the base portion and a height of the end portion to a width of the base portion being greater than or equal to 1.

2.

2. The display panel according to claim 1, characterized in that: A ratio of a sum of a height of the base portion and a height of the end portion to a width of the base portion is less than or equal to 6.

3. The display panel according to claim 1, characterized in that: The height of the base portion is equal to the height of the end portion.

4. The display panel according to claim 1, characterized in that: The side wall of the base portion includes a first inclined surface, the first inclined surface has a first slope, wherein, The side wall of the end portion comprises an arcuate surface, and along the direction of the end portion away from the base portion, the second slope of the tangent line of the arcuate surface at different positions gradually decreases; or The side wall of the end portion includes a second inclined surface, the second inclined surface has a third slope, and the third slope is smaller than the first slope.

5. The display panel according to claim 4, characterized in that: The end portion is a part of a sphere, and the axis of the sphere coincides with the central axis of the light-emitting unit; or, The end portion is a portion of an ellipsoid, and the major axis of the ellipsoid coincides with the central axis of the light-emitting unit.

6. The display panel according to any one of claims 1 to 5, characterized in that: A ratio of the height of the light output structure to the width of the gap is greater than 6.

7. The display panel according to claim 6, characterized in that: A ratio of the height of the light output structure to the width of the gap is less than or equal to 12.

8. A display device, characterized in that: include: A display panel as claimed in any one of claims 1 to 7.

9. A method for manufacturing a display panel, characterized in that: include: Making light-emitting units spaced apart from each other on a driving substrate; A light emitting structure is respectively manufactured on each of the light emitting units, wherein a gap is provided between two adjacent light emitting structures, and the light emitting structure comprises a base portion and an end portion sequentially arranged along a height direction thereof, the end portion is located on a side of the base portion away from the light emitting unit, and a ratio of a sum of a height of the base portion and a height of the end portion to a width of the base portion is greater than or equal to 1.

2.

10. The method for manufacturing a display panel according to claim 9, characterized in that: The light structures are fabricated on each of the light-emitting units, respectively, including: Disposing a base material layer on a side of the light emitting unit away from the driving substrate; Opening a first groove on the base material layer by a photolithography process to form a base portion; Disposing an end material layer on a side of the base away from the driving substrate; Opening a second groove on the end material layer by a photolithography process to form an initial end; Disposing a photoresist on a side of the initial end away from the driving substrate; After the photoresist is exposed and developed, thermal reflow is performed, so that the remaining photoresist includes an arc-shaped side surface, and along the direction in which the initial end portion is away from the drive substrate, a fourth slope of a tangent line of the arc-shaped side surface at different positions gradually decreases; and The shape of the remaining photoresist is transferred to the initial end portion through an etching process to form the end portion.

Images