Display panel, preparation method thereof and display device

Abstract

The present disclosure provides a display panel, comprising: a first substrate; an array of light emitting units and an array of color control units, the array of color control units being located on a side of the array of light emitting units away from the first substrate, and each color control unit in the array of color control units corresponding to one light emitting unit in the array of light emitting units; at least part of the light emitting units being provided with corresponding light barrier structures, the light barrier structures being located between the light emitting units and the color control units and having light transmission units; the light barrier structures being configured to shield light emitted by the light emitting units and directed to the color control units not corresponding to the light emitting units, and to allow part of the light emitted by the light emitting units and directed to the color control units corresponding to the light emitting units to be transmitted at the light transmission units corresponding to the light emitting units. The present disclosure also provides a preparation method of the display panel and a display device.

Description

Technical Field

[0001] This invention relates to the field of displays, and in particular to a display panel, its manufacturing method, and a display device. Background Technology

[0002] QD-OLED, which combines organic light-emitting diode (OLED) and quantum dot (QD) color filters, has the technical advantages of high color gamut and high color purity due to the narrow half-width of the photoluminescence spectrum of QD materials, and it is not dependent on viewing angle.

[0003] However, since there is often a packaging structure between the OLED and the color control unit to encapsulate the OLED, there is a certain distance (generally greater than 10μm) between the OLED and the color control unit facing it. At this time, the light emitted by the OLED can not only illuminate the color control unit facing it, but also illuminate other color control units located around the color control unit facing the OLED, thus causing brightness interference problems. Summary of the Invention

[0004] In a first aspect, embodiments of this disclosure provide a display panel, including:

[0005] First substrate;

[0006] The light-emitting unit array and the color control unit array are provided, wherein the color control unit array is located on the side of the light-emitting unit array away from the first substrate, and the color control units in the color control unit array correspond one-to-one with the light-emitting units in the light-emitting unit array.

[0007] Among them, at least some of the light-emitting units are configured with corresponding aperture structures, the aperture structures are located between the light-emitting units and the color control unit, and light-transmitting units are formed on the aperture structures;

[0008] The orthographic projection of the light-transmitting unit on the substrate overlaps with the orthographic projection of the light-emitting unit corresponding to the light-transmitting unit on the first substrate, and the orthographic projection area of ​​the light-transmitting unit on the first substrate is smaller than the orthographic projection area of ​​the light-emitting unit corresponding to the light-transmitting unit on the first substrate.

[0009] The aperture structure is configured to block the light emitted by the light-emitting unit that is directed toward the color control unit that is not corresponding to the light-emitting unit, and to allow a portion of the light emitted by the light-emitting unit that is directed toward the color control unit corresponding to the light-emitting unit to be transmitted at the light-transmitting unit corresponding to the light-emitting unit.

[0010] In some embodiments, the orthographic projection of the light-transmitting unit on the substrate is located within the orthographic projection of the light-emitting unit corresponding to the light-transmitting unit on the substrate.

[0011] In some embodiments, the aperture structure is specifically configured to block light emitted by the light-emitting unit that is directed to the color control unit not corresponding to the light-emitting unit and whose emission angle is less than or equal to a preset angle. The emission angle of the light is the angle between the light and the normal of the first substrate.

[0012] At least one dielectric layer is disposed between the aperture structure and the light-emitting unit;

[0013] The distance s between the edge of the orthogonal projection of the light-transmitting unit on the first substrate and the edge of the orthogonal projection of the light-emitting unit corresponding to the light-transmitting unit on the first substrate satisfies the following:

[0014] s = L2 - L1;

[0015] Wherein, L1 is the spacing between adjacent light-emitting units, and L2 is the offset when the light emitted by the light-emitting unit at the preset angle reaches the layer structure where the aperture structure is located;

[0016]

[0017] M is the number of dielectric layers between the aperture structure and the light-emitting unit, d i θ is the thickness of the i-th dielectric layer located between the aperture structure and the light-emitting unit and close to the light-emitting unit. i The angle between the propagation direction of the light emitted by the light-emitting unit at the preset angle and the normal of the first substrate when the light reaches the interior of the i-th dielectric layer is θ1, which is equal to the preset angle. i Let be the refractive index of the i-th dielectric layer.

[0018] In some embodiments, the orthographic projection of the light-transmitting unit on the first substrate and the orthographic projection of the light-emitting unit corresponding to the light-transmitting unit on the first substrate have the same shape and coincide at their center points.

[0019] In some embodiments, the orthographic projection of the light-transmitting unit on the first substrate and the orthographic projection of the color control unit corresponding to the light-transmitting unit on the first substrate have the same shape and coincide at their center points.

[0020] In some embodiments, the display panel further includes:

[0021] A first packaging structure is located between the light-emitting unit array and the color control unit array, and the first packaging structure is configured to encapsulate the light-emitting unit array;

[0022] The color control unit is in contact with the first packaging structure.

[0023] In some embodiments, the display panel further includes:

[0024] A first packaging structure is located between the light-emitting unit array and the color control unit array, and the first packaging structure is configured to encapsulate the light-emitting unit array;

[0025] At least a portion of the color control units are provided with a second packaging structure and a filler layer between them and the first packaging structure. The filler layer is located between the second packaging structure and the first packaging structure. The second packaging structure is configured to encapsulate at least a portion of the color control units in the color control unit array.

[0026] In some embodiments, the aperture structure is embedded within the first encapsulation structure.

[0027] In some embodiments, the first packaging structure includes:

[0028] A first inorganic encapsulation layer and an organic encapsulation layer located on the side of the first inorganic encapsulation layer away from the first substrate and in contact with the first inorganic encapsulation layer;

[0029] The aperture structure is located between the first inorganic encapsulation layer and the organic encapsulation layer.

[0030] In some embodiments, the aperture structure is located between the first packaging structure and the color control unit array.

[0031] In some embodiments, the aperture structure is in contact with the color control unit.

[0032] In some embodiments, the aperture structure is located between the first packaging structure and the color control unit array.

[0033] In some embodiments, the aperture structure is located between the first encapsulation structure and the filling layer, and the aperture structure is in contact with the filling layer.

[0034] In some embodiments, the display panel further includes:

[0035] A second packaging structure is located at least partially on the side of the color control unit away from the first substrate, and the second packaging structure is configured to encapsulate at least a portion of the color control units in the color control unit array;

[0036] A color resist pattern array is located on the side of the second packaging structure away from the first substrate, and the color resist patterns in the color resist pattern array correspond one-to-one with the color control units in the color control unit array;

[0037] A third packaging structure is located on the side of the color resist pattern array away from the first substrate, and the third packaging structure is configured to encapsulate the color resist pattern array.

[0038] In some embodiments, the orthographic projection of the color control unit on the first substrate is located within the area covered by the orthographic projection of the light-transmitting unit corresponding to the color control unit on the first substrate.

[0039] In some embodiments, the display panel further includes:

[0040] A color resist pattern array is located on the side of the color control unit array away from the first substrate, and the color resist patterns in the color resist pattern array correspond one-to-one with the color control units in the color control unit array;

[0041] The second substrate is located on the side of the color resist pattern array that is away from the first substrate.

[0042] In some embodiments, the orthographic projection of the light-transmitting unit on the substrate lies within the orthographic projection of the color control unit corresponding to the light-transmitting unit on the substrate.

[0043] In some embodiments, the orthographic projection of the light-emitting unit on the substrate is located within the orthographic projection of the color control unit corresponding to the light-emitting unit on the substrate.

[0044] In some embodiments, the preset angle is less than or equal to 60°.

[0045] In some embodiments, the optical density of the portion of the aperture structure located outside the area where the light-transmitting unit is located is greater than 1.

[0046] In some embodiments, the display panel further includes:

[0047] The second pixel defining layer has a second pixel receiving hole array, wherein the second pixel receiving holes in the second pixel receiving hole array correspond one-to-one with the color control units in the color control unit array, and the color control units in the color control unit array are located in the corresponding second pixel receiving holes.

[0048] The thickness of the second pixel defining layer is three times or more the thickness of the aperture structure.

[0049] In some embodiments, the slope angle of the sidewalls of the aperture structure used to form the light-transmitting unit is 30° to 90°.

[0050] In some embodiments, the slope angle of the sidewalls of the aperture structure used to form the light-transmitting unit is 60° to 90°.

[0051] In some embodiments, the material of the aperture structure includes a resin material with light-shielding function.

[0052] In some embodiments, the light-emitting unit emits light of a preset color;

[0053] Each color control unit in the color control unit array is selected from a color conversion unit or a light transmission unit;

[0054] The color conversion unit is configured to convert the preset color light into other color light;

[0055] The light transmission unit is configured to transmit the preset color light.

[0056] In some embodiments, the color conversion unit is made of quantum dot material;

[0057] The material of the light transmission unit includes transparent resin and scattering particles distributed within the transparent resin.

[0058] In some embodiments, when a second encapsulation structure is included within the display panel, the color control unit encapsulated by the second encapsulation structure includes at least the color conversion unit.

[0059] In some embodiments, the display panel further includes:

[0060] The first pixel defining layer has a first pixel receiving hole array, wherein the first pixel receiving hole in the first pixel receiving hole array corresponds one-to-one with the light-emitting unit in the light-emitting unit array, and the light-emitting unit is located in the corresponding first pixel receiving hole.

[0061] In some embodiments, the display panel includes an aperture layer, the aperture layer includes a plurality of aperture structures corresponding one-to-one with the light-emitting unit, and the light-transmitting unit on the aperture structure is a light-transmitting hole;

[0062] The orthogonal projection of the aperture layer on the substrate completely covers the orthogonal projection of the first pixel defining layer on the substrate, and the orthogonal projection area of ​​the aperture layer on the substrate is greater than the orthogonal projection area of ​​the first pixel defining layer on the substrate.

[0063] Secondly, embodiments of this disclosure also provide a display device, which includes: the display panel as described in the first aspect above.

[0064] Thirdly, embodiments of this disclosure also provide a method for manufacturing a display panel, wherein the method is used to manufacture the display panel as provided in the first aspect above, and the method includes:

[0065] An array of light-emitting units is formed on a first substrate.

[0066] An aperture structure is formed on the side of the light-emitting unit array away from the first substrate, which is at least part of the light-emitting units. A light-transmitting unit is formed on the aperture structure. The orthographic projection of the light-transmitting unit on the substrate overlaps with the orthographic projection of the light-emitting unit corresponding to the light-transmitting unit on the first substrate. The orthographic projection area of ​​the light-transmitting unit on the first substrate is smaller than the orthographic projection area of ​​the light-emitting unit corresponding to the light-transmitting unit on the first substrate.

[0067] A color control unit array is formed, the color control unit array is located on the side of the aperture structure away from the first substrate, and the color control units in the color control unit array correspond one-to-one with the light-emitting units in the light-emitting unit array;

[0068] The aperture structure is configured to block the light emitted by the light-emitting unit that is directed toward the color control unit that is not corresponding to the light-emitting unit, and to allow a portion of the light emitted by the light-emitting unit that is directed toward the color control unit corresponding to the light-emitting unit to be transmitted at the light-transmitting unit corresponding to the light-emitting unit.

[0069] In some embodiments, between the step of forming the light-emitting unit array and the step of forming the color control unit array, the following method is further included:

[0070] Forming the first packaging structure;

[0071] The steps of forming the first packaging structure and forming the aperture structure specifically include:

[0072] Forming the first inorganic encapsulation layer;

[0073] A first inorganic encapsulation layer is formed on the side of the light-emitting unit array away from the first substrate.

[0074] An aperture structure is formed on the side of the first inorganic encapsulation layer away from the first substrate.

[0075] An organic encapsulation layer is formed on the side of the aperture structure away from the first substrate.

[0076] In some embodiments, the step of forming the aperture structure includes:

[0077] The surface of the first inorganic encapsulation layer away from the first substrate is surface treated such that the surface of the first inorganic encapsulation layer away from the first substrate is hydrophilic in the region where the aperture structure is to be formed, and / or the surface of the first inorganic encapsulation layer away from the first substrate is hydrophobic in the region where the light-transmitting unit is to be formed.

[0078] In a nitrogen atmosphere, a light-shielding resin material is formed in the area where the aperture structure is to be formed using an inkjet printing process.

[0079] The resin material is cured to obtain the aperture structure.

[0080] In some embodiments, the display panel is the display panel of claim 10 or 12, and after the step of forming the light-emitting unit array, it further includes:

[0081] Forming the first packaging structure;

[0082] The steps to form the aperture structure include:

[0083] The aperture structure is formed on the side of the first packaging structure away from the first substrate using inkjet printing or photolithography.

[0084] In some embodiments, the preparation method includes:

[0085] Forming a first display substrate specifically includes the steps of forming a light-emitting unit array on a first substrate and forming the aperture structure on the side of the light-emitting unit array away from the first substrate.

[0086] Forming a second display substrate specifically includes the step of forming a color control unit array on a second substrate.

[0087] The first display substrate and the second display substrate are aligned, and after alignment, the light-emitting unit array, the aperture structure and the color control unit array are all located between the first substrate and the second substrate. Attached Figure Description

[0088] Figure 1 This is a schematic cross-sectional view of a display panel involved in related technologies;

[0089] Figure 2 A cross-sectional schematic diagram of a portion of a display panel provided in an embodiment of this disclosure;

[0090] Figure 3 This is a schematic diagram of the light field distribution of the light-emitting unit in an embodiment of this disclosure;

[0091] Figure 4 This is a cross-sectional schematic diagram of the light-emitting unit array, aperture structure, and color control unit array in this disclosure;

[0092] Figure 5 This is a top view schematic diagram of a light-emitting unit and its corresponding light-transmitting unit in an embodiment of this disclosure;

[0093] Figure 6 This is a top view schematic diagram of a light-emitting unit and its corresponding light-transmitting unit and color control unit in an embodiment of this disclosure;

[0094] Figure 7 Another cross-sectional schematic diagram of a portion of a display panel provided in an embodiment of this disclosure;

[0095] Figure 8 Another cross-sectional schematic diagram of a portion of a display panel provided in an embodiment of this disclosure;

[0096] Figure 9A Another cross-sectional schematic diagram of a portion of a display panel provided in an embodiment of this disclosure;

[0097] Figure 9B Another cross-sectional schematic diagram of a portion of a display panel provided in an embodiment of this disclosure;

[0098] Figure 9C Another cross-sectional schematic diagram of a portion of a display panel provided in an embodiment of this disclosure;

[0099] Figure 9D Another cross-sectional schematic diagram of a portion of a display panel provided in an embodiment of this disclosure;

[0100] Figure 10A Another cross-sectional schematic diagram of a portion of a display panel provided in an embodiment of this disclosure;

[0101] Figure 10B Another cross-sectional schematic diagram of a portion of a display panel provided in an embodiment of this disclosure;

[0102] Figure 11 for Figure 7 Figure 9 shows a cross-sectional schematic diagram of a portion of the aperture structure and light-emitting unit within the display panel;

[0103] Figure 12 for Figure 8 Figure 10 shows a cross-sectional schematic diagram of a portion of the aperture structure and light-emitting unit within the display panel.

[0104] Figure 13 A flowchart illustrating a method for manufacturing a display panel according to an embodiment of this disclosure;

[0105] Figure 14 A flowchart illustrating another method for manufacturing a display panel according to an embodiment of this disclosure;

[0106] Figure 15 A cross-sectional schematic diagram of the intermediate structure of the display panel obtained after performing step S201;

[0107] Figure 16 A cross-sectional schematic diagram of the intermediate structure of the display panel obtained after performing step S202;

[0108] Figure 17 A cross-sectional schematic diagram of the intermediate structure of the display panel obtained after performing step S203;

[0109] Figure 18 This is a flowchart of an optional implementation method of step S203 in this disclosure;

[0110] Figure 19 This is a flowchart of another optional implementation method of step S203 in this disclosure;

[0111] Figure 20 A cross-sectional schematic diagram of the intermediate structure of the display panel obtained after performing step S204;

[0112] Figure 21 This is another cross-sectional schematic diagram of the intermediate structure of the display panel obtained after performing step S204;

[0113] Figure 22 A cross-sectional schematic diagram of the intermediate structure of the display panel obtained after performing step S205;

[0114] Figure 23 A flowchart illustrating another method for manufacturing a display panel according to an embodiment of this disclosure;

[0115] Figure 24 A cross-sectional schematic diagram of the first display substrate obtained after performing step S301;

[0116] Figure 25 This is a cross-sectional schematic diagram of the second display substrate obtained after performing step S302. Detailed Implementation

[0117] To enable those skilled in the art to better understand the technical solution of the present invention, a display panel, its preparation method, and display device provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0118] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Furthermore, the embodiments and features in the embodiments of this disclosure can be combined with each other without conflict. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0119] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that an element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0120] Figure 1 This is a cross-sectional schematic diagram of a display panel involved in the related technology, such as... Figure 1 As shown, the display panel is divided into multiple sub-pixel areas (PIX). Each sub-pixel area (PIX) contains a color control unit (a) and a corresponding light-emitting unit (a). An encapsulation structure (4) is provided between the color control unit (a) and its corresponding light-emitting unit (a), creating a certain distance between them. Since the light emitted by the light-emitting unit (a) is scattered light, a portion of the light emitted by the light-emitting unit (a) (called "effective light") will be directed towards the corresponding color control unit, while another portion (called "interference light") will be directed towards other color control units (a) located around the corresponding color control unit (a).

[0121] by Figure 1 In the case shown, the light emitted by the light-emitting unit A1 will not only illuminate the corresponding color control unit a1, but also illuminate other color control units a2, a3, a4, and a5. In particular, the color control units a2 and a3 adjacent to the color control unit a1 will receive strong interference light, that is, the light-emitting unit A1 will cause serious interference to the brightness of the area where the color control units a2 and a3 are located.

[0122] As can be seen from the above, the display panels provided by the relevant technologies have the problem of brightness interference between different sub-pixel areas, and the brightness interference between adjacent sub-pixel areas is particularly severe.

[0123] To effectively improve the problem of brightness interference between sub-pixel areas caused by light emitted by the light-emitting unit illuminating the uncorresponding color control unit in related technologies, this disclosure provides a corresponding solution.

[0124] Figure 2 A cross-sectional schematic diagram of a portion of a display panel provided in an embodiment of this disclosure, such as... Figure 2 As shown, the display panel is divided into multiple sub-pixel areas arranged in an array. The display panel includes: a first substrate 1, a light-emitting unit array 2, and a color control unit array 3.

[0125] The first substrate 1 can be a suitable substrate such as a rigid substrate (e.g., a glass substrate) or a flexible substrate (e.g., a resin substrate).

[0126] The color control unit array 3 is located on the side of the light-emitting unit array 2 away from the first substrate 1. The color control unit array 3 includes multiple color control units 3r, 3g, and 3b that correspond one-to-one with the sub-pixel regions. The light-emitting unit array 2 includes multiple light-emitting units 2a that correspond one-to-one with the sub-pixel regions. In each sub-pixel region, a light-emitting unit 2a and a color control unit 3r, 3g, and 3b are provided. The light-emitting units 2a and color control units 3r, 3g, and 3b located in the same sub-pixel region correspond to each other and are arranged facing each other.

[0127] The display panel also includes an aperture structure 5 configured for at least some of the light-emitting units. The aperture structure 5 is located between the corresponding light-emitting unit and the corresponding color control unit, and a light-transmitting unit 5a is formed on the aperture structure 5. That is, for each subpixel area configured with the aperture structure 5, a light-emitting unit 2a, a color control unit 3r, 3g, 3b and a light-transmitting unit 5a are provided, and the light-transmitting unit 5a is located between the corresponding light-emitting unit 2a and the color control unit 3r, 3g, 3b.

[0128] Among them, the orthographic projection of the light-transmitting unit 5a on the first substrate 1 overlaps with the orthographic projection of the light-emitting unit 2a corresponding to the light-transmitting unit 5a on the first substrate 1, and the orthographic projection area of ​​the light-transmitting unit 5a on the first substrate 1 is smaller than the orthographic projection area of ​​the light-emitting unit 2a corresponding to the light-transmitting unit 5a on the first substrate 1.

[0129] The aperture structure 5 is configured to block the light emitted by the light-emitting unit 2a that is directed to the color control unit that is not corresponding to the light-emitting unit 2a, and to allow part of the light emitted by the light-emitting unit 2a that is directed to the color control unit corresponding to the light-emitting unit 2a to be transmitted at the light-transmitting unit 5a corresponding to the light-emitting unit 2a.

[0130] In this embodiment, by setting a corresponding aperture structure 5 between at least some light-emitting units 2a and their corresponding color control units, the aperture structure 5 allows some of the light emitted by the light-emitting unit 2a and directed towards the color control units 3r, 3g, and 3b corresponding to the light-emitting unit 2a to be transmitted through the light-transmitting unit 5a corresponding to the light-emitting unit 2a. This ensures that at least some of the light emitted by the light-emitting unit 2a can reach the color control units 3r, 3g, and 3b corresponding to the light-emitting unit 2a, thereby ensuring that each sub-pixel area can be displayed normally. At the same time, the aperture structure 5 can also block the light emitted by the light-emitting unit 2a and directed towards the color control units 3r, 3g, and 3b not corresponding to the light-emitting unit 2a, which can effectively improve the problem of brightness interference between different sub-pixel areas in the related technology.

[0131] See Figure 2 As shown, in some embodiments, each light-emitting unit 2a is configured with a corresponding aperture structure 5, which can effectively improve the problem of brightness interference between sub-pixel areas on the display panel. It should be noted that... Figure 2 The illustration only shows the case where each light-emitting unit 2a is configured with a corresponding aperture structure 5 (i.e., each light-emitting unit is configured with a corresponding light-emitting unit 5a). This case is only for illustrative purposes and will not limit the technical solution of this disclosure.

[0132] As can be seen from the foregoing inventive principles, by configuring a corresponding aperture structure for the light-emitting unit in this disclosure, the brightness interference of the corresponding light-emitting unit to other surrounding sub-pixel areas can be effectively improved; that is, in this disclosure, as long as the aperture structure is configured for some of the light-emitting units, the problem of brightness interference between different sub-pixel areas in the related technology can be improved to a certain extent.

[0133] In the embodiments of this disclosure, the light-emitting unit 2a can be an OLED, a light-emitting diode (LED), a micro-LED, a mini-LED, etc.

[0134] In some embodiments, each color control unit 3r, 3g, and 3b in the color control unit array 3 can be selected from a color conversion unit or a light transmission unit; wherein, the color conversion unit is configured to convert a preset color light into other color light; and the light transmission unit is configured to transmit the preset color light.

[0135] In some embodiments, the material of the color conversion unit includes quantum dot material; the material of the light transmission unit includes transparent resin and scattering particles distributed within the transparent resin.

[0136] As a specific example, the light-emitting unit 2a is a blue OLED. The color control unit array 3 may specifically include a red color conversion unit 3r (corresponding to a red sub-pixel area), a green color conversion unit 3g (corresponding to a green sub-pixel area), and a blue light transmission unit 3b (corresponding to a blue sub-pixel area). The red color conversion unit 3r can convert the blue light emitted by the blue OLED into red light, the green color conversion unit 3g can convert the green light emitted by the blue OLED into green light, and the blue light transmission unit 3b is filled with scattering particles (such as titanium oxide scattering particles) to allow the blue light emitted by the blue OLED to pass through and be scattered. Based on the above settings, color display of the display panel can be realized.

[0137] In some embodiments, the aperture structure 5 is specifically configured to block light emitted by the light-emitting unit 2a that is directed to a color control unit not corresponding to the light-emitting unit 2a and whose emission angle is less than or equal to a preset angle; so as to ensure that light emitted by the light-emitting unit 2a with an emission angle less than or equal to the preset angle cannot reach the uncorresponding color control units 3r, 3g, 3b; wherein, the emission angle of the light is the angle between the light and the normal of the first substrate.

[0138] Figure 3 This is a schematic diagram of the light field distribution of the light-emitting unit in an embodiment of this disclosure, as shown below. Figure 3 As shown, the horizontal axis represents the light emission angle, and the vertical axis represents the coefficient of light emission intensity; the greater the light emission intensity, the larger the corresponding coefficient. The coefficient of light emission intensity for a light emission angle of 0° is denoted as "1".

[0139] according to Figure 3 It can be seen that within the range of 0° to x1°, the coefficient of light intensity gradually decreases as the light emission angle increases; within the range of x1° to x2°, the coefficient of light intensity gradually increases as the light emission angle increases; and within the range of x2° to 90°, the coefficient of light intensity gradually decreases as the light emission angle increases. Specifically, x1° is approximately 40°, and x2° is approximately 60°.

[0140] Figure 4 This is a cross-sectional schematic diagram of the light-emitting unit array, aperture structure, and color control unit array in this disclosure, as shown below. Figure 4 As shown, since the light-emitting unit 2a emits light in any direction on the light-emitting side (the emission angle of the emitted light covers the range of 0° to 90°), when there is a certain distance between the aperture structure 5 and the light-emitting unit 2a, some light emitted by the light-emitting unit 2a with a large emission angle can always be emitted through the non-corresponding light-transmitting unit 5a, thereby causing brightness interference in the sub-pixel area where the non-corresponding light-transmitting unit 5a of the light-emitting unit 2a is located.

[0141] pass Figure 3 It is evident that light rays with small emission angles correspond to relatively high brightness, while light rays with large emission angles correspond to relatively low brightness. Therefore, to minimize the brightness interference of the light-emitting unit 2a on other sub-pixel areas, it is essential to prevent light rays with small emission angles emitted by the light-emitting unit 2a from reaching the color control unit not corresponding to the light-emitting unit 2a (light rays emitted from the light-transmitting unit 5a not corresponding to the light-emitting unit 2a should ideally have large emission angles). Based on this, the specific value of the "preset angle" can be preset according to actual needs. An emission angle larger than the preset angle can be considered a large emission angle, and an emission angle smaller than or equal to the preset angle can be considered a small emission angle. In some embodiments, the preset angle is less than or equal to 60°, for example, the preset angle is 40° or 60°.

[0142] It should be noted that the smaller the preset angle value, the smaller the linewidth of the aperture structure 5, and the more severe the brightness interference of the light-emitting unit 2a on the non-corresponding sub-pixel area. Conversely, the larger the preset angle value, the larger the linewidth of the aperture structure 5, and the more the aperture structure 5 blocks the corresponding light-emitting unit 2a (the smaller the size of the light-transmitting unit 5a). This results in less light emitted by the light-emitting unit 2a reaching the corresponding color control units 3r, 3g, and 3b, and a lower utilization rate of the light emitted by the light-emitting unit 2a. In practical applications, the specific value of the "preset angle" can be set based on both the degree of brightness interference and the utilization rate of the light emitted by the light-emitting unit 2a.

[0143] In some embodiments, the optical density (OD) of the portion of the aperture structure 5 located outside the area where the light-transmitting unit 5a is located is greater than 1, so as to ensure the light-blocking effect of the portion of the aperture structure 5 located outside the area where the light-transmitting unit 5a is located.

[0144] In some embodiments, the material of the aperture structure 5 includes a resin material with light-shielding function.

[0145] In some embodiments, the slope angle of the sidewalls of the aperture structure 5 used to form the light-transmitting unit 5a is 30° to 90°. Preferably, the slope angle of the sidewalls of the aperture structure 5 used to form the light-transmitting unit 5a is 60° to 90°. Given a fixed thickness of the aperture structure 5, the smaller the slope angle of the sidewalls used to form the light-transmitting unit 5a, the larger the area of ​​the thinner sidewall portion, and the worse the overall light-blocking effect of the sidewall portion (the smaller the OD value). Therefore, in practical applications, the slope angle should be as large as possible, ideally 90°.

[0146] Figure 5 This is a top view schematic diagram of a light-emitting unit and its corresponding light-transmitting unit in an embodiment of this disclosure, as shown below. Figure 5 As shown, in some embodiments, the orthogonal projection of the light-transmitting unit 5a on the substrate 1 lies within the orthogonal projection of the light-emitting unit 2a corresponding to the light-transmitting unit 5a on the substrate 1. That is, the light-transmitting unit 5a and the corresponding light-emitting unit 2a are arranged facing each other.

[0147] When the light-transmitting unit 5a and the corresponding light-emitting unit 2a are positioned opposite each other, the light emitted by the light-emitting unit 2a through the light-transmitting unit 5a and directed towards the corresponding color control unit is mostly small-angle light; based on Figure 3 As can be seen from the light field distribution diagram of the light-emitting unit 2a shown, the light intensity of these small-angle lights is relatively large, which is beneficial to improving the light output utilization rate of the light-emitting unit 2a.

[0148] The orthographic projection of the light-emitting unit on the substrate is located within the orthographic projection of the color control unit corresponding to the light-emitting unit on the substrate.

[0149] In some embodiments, the orthographic projection of the light-transmitting unit 5a on the first substrate 1 and the orthographic projection of the light-emitting unit 2a corresponding to the light-transmitting unit 5a on the first substrate 1 have the same shape and coincide in center.

[0150] Figure 6 This is a top view schematic diagram of a light-emitting unit and its corresponding light-transmitting unit and color control unit in an embodiment of this disclosure, as shown below. Figure 6 As shown, in some embodiments, the orthographic projection of the light-emitting unit 2a on the substrate 1 lies within the orthographic projection of the color control units 3r, 3g, and 3b corresponding to the light-emitting unit 2a on the substrate 1, and the orthographic projection of the light-transmitting unit 5a on the substrate 1 lies within the orthographic projection of the light-emitting unit 2a corresponding to the light-transmitting unit 5a on the substrate 1. That is, the light-emitting unit 2a and its corresponding light-transmitting unit 5a and corresponding color control units 3r, 3g, and 3b are all arranged facing each other. The orthographic projection area of ​​the color control unit on the substrate 1 is larger than the orthographic projection area of ​​the corresponding light-transmitting unit 5a on the substrate 1, and the orthographic projection area of ​​the light-transmitting unit 5a on the substrate 1 is larger than the orthographic projection area of ​​the corresponding light-transmitting unit 5a on the substrate 1.

[0151] In some embodiments, the orthographic projection of the light-transmitting unit 5a on the first substrate 1 and the orthographic projection of the color control units 3r, 3g, and 3b corresponding to the light-transmitting unit 5a on the first substrate 1 have the same shape and coincide in center.

[0152] Furthermore, the orthographic projection of the light-transmitting unit 5a on the first substrate 1, the orthographic projection of the light-emitting unit 2a corresponding to the light-transmitting unit 5a on the first substrate 1, and the orthographic projection of the color control units 3r, 3g, and 3b corresponding to the light-transmitting unit 5a on the first substrate 1 have the same shape and their center points coincide.

[0153] In some embodiments, the display panel is a layered display panel, meaning that the light-emitting unit array, the aperture structure, and the color control unit array are sequentially formed on the first substrate. In this case, the display panel further includes a first encapsulation structure 4, located between the light-emitting unit array 2 and the color control unit array 3, configured to encapsulate the light-emitting unit array 2; wherein the color control unit array 3 is in contact with the first encapsulation structure 4; that is, the color control unit array 3 is directly fabricated on the first encapsulation structure 4.

[0154] See also Figure 6 As shown, when the display panel is a layered display panel, in some embodiments, the orthographic projections of color control units 3r, 3g, and 3b on the first substrate 1 completely cover the orthographic projections of the light-transmitting units 5a corresponding to the color control units 3r, 3g, and 3b on the first substrate 1, and are located within the area defined by the orthographic projections of the light-emitting units 2a corresponding to the color control units 3r, 3g, and 3b on the first substrate 1; the orthographic projection area of ​​the color control units 3r, 3g, and 3b on the first substrate 1 is larger than the orthographic projection area of ​​the light-transmitting units 5a corresponding to the color control units 3r, 3g, and 3b on the first substrate 1, and smaller than the orthographic projection area of ​​the light-emitting units 2a corresponding to the color control units 3r, 3g, and 3b on the first substrate 1.

[0155] See Figure 4 As shown, in some embodiments, the spacing s1 between adjacent light-emitting units 2a is 12μm to 14μm; the spacing s2 between adjacent light-transmitting units 5a is 33μm to 35μm; and the spacing s3 between adjacent color control units 3r, 3g, and 3b is 23μm to 25μm.

[0156] See also Figure 2 As shown, in some embodiments, the aperture structure 5 is embedded within the first encapsulation structure 4.

[0157] Figure 7 Another cross-sectional view of a portion of the display panel provided in the embodiments of this disclosure, such as... Figure 7 As shown, Figure 7 This illustration shows a specific implementation where the aperture structure 5 is embedded within the first packaging structure 4. The first packaging structure 4 includes: a first inorganic packaging layer 401 and an organic packaging layer 402 located on the side of the first inorganic packaging layer 401 away from the first substrate 1 and in contact with the first inorganic packaging layer 401; the aperture structure 5 is located between the first inorganic packaging layer 401 and the organic packaging layer 402.

[0158] It should be noted that, Figure 7The diagram only shows a first inorganic encapsulation layer 401 and an organic encapsulation layer 402 as an example. This is for illustrative purposes only and does not limit the technical solutions of this disclosure. In some embodiments, a first inorganic encapsulation layer 401 and an organic encapsulation layer 402 in contact with the surface of the first inorganic encapsulation layer 401 away from the first substrate 1 constitute a repeating encapsulation unit. The first encapsulation structure 4 contains at least two repeating encapsulation units stacked along the normal direction of the first substrate 1. In this case, the aperture structure 5 can be located in any one of the repeating encapsulation units to achieve the aperture structure 5 being embedded in the first encapsulation structure 4; no corresponding drawings are given for this case.

[0159] In addition, in some embodiments, the first packaging structure 4 further includes a second inorganic packaging layer 403, which is located on the outermost side of the first packaging structure 4 and away from the first substrate 1.

[0160] Figure 8 Another cross-sectional schematic diagram of a portion of the display panel provided in the embodiments of this disclosure, such as... Figure 8 As shown, the display panel is also a layered display panel, meaning the color control unit array 3 is in contact with the first encapsulation structure 4; but with Figure 2 and Figure 7 The case where the aperture structure 5 is embedded within the first encapsulation structure 4 is different. Figure 8 This diagram illustrates the position of the aperture structure 5 between the first encapsulation structure 4 and the color control unit array 3.

[0161] It should be noted that, Figure 8 The example provided illustrates a first encapsulation structure 4 comprising a first inorganic encapsulation layer 401, an organic encapsulation layer 402, and a second inorganic encapsulation layer 403 stacked sequentially. This configuration does not limit the technical solution of this disclosure. The specific structure of the first encapsulation structure 4 is not limited in this disclosure.

[0162] In some embodiments, the first inorganic encapsulation layer 401 and the second inorganic encapsulation layer 403 can both be obtained by depositing silicon oxide and / or silicon nitride materials through chemical vapor deposition (CVD) process, with a thickness generally of 0.6 μm to 1.2 μm; the organic encapsulation film can be obtained by inkjet printing (IJP) organic materials, with a thickness generally of 6 μm to 8 μm, and the organic encapsulation film can also play a planarization role.

[0163] See also Figure 2 , Figure 7 and Figure 8As shown, in some embodiments, the display panel further includes: a first pixel defining layer 7 and a second pixel defining layer 8.

[0164] The first pixel defining layer 7 has a first pixel receiving hole array, and the first pixel receiving hole in the first pixel receiving hole array corresponds one-to-one with the light-emitting unit 2a in the light-emitting unit array 2. The light-emitting unit 2a is located in the corresponding pixel receiving hole.

[0165] The material of the first pixel defining layer 7 can be a transparent resin material or a colored resin material, preferably a colored resin material, and more preferably a black resin material. The second pixel defining layer 8 (also called a dam, bank) has a second pixel receiving hole array, and the second pixel receiving holes in the second pixel receiving hole array correspond one-to-one with the color control units 3r, 3g, and 3b in the color control unit array 3, and the color control units 3r, 3g, and 3b in the color control unit array 3 are located in the corresponding pixel receiving holes.

[0166] The material of the second pixel defining layer 8 can be a light-absorbing material (such as black resin) or a reflective material. When the second pixel defining layer 8 is made of a light-absorbing material, although it effectively avoids light crosstalk between different sub-pixels, it will result in a lower light extraction rate in the sub-pixel area. When the second pixel defining layer 8 is made of a reflective material, although it can effectively improve the light extraction rate in the sub-pixel area, the direction of light reflection is uncontrollable, which increases the risk of color crosstalk.

[0167] The size of the first / second receiving hole on the first / second pixel defining layer 8 and the spacing between the first / second receiving holes are related to the size of the sub-pixel area set on the display panel. The technical solution disclosed herein does not limit the specific values ​​of the size of the first / second receiving hole and the spacing between the first / second receiving holes.

[0168] In some embodiments, the display panel includes an aperture layer, which includes a plurality of aperture structures 5 corresponding one-to-one with the light-emitting units (i.e., all aperture structures 5 constitute the aperture layer), and the light-transmitting unit 5a on the aperture structure 5 is a light-transmitting hole; the orthogonal projection of the aperture layer on the substrate 1 completely covers the orthogonal projection of the first pixel defining layer 7 on the substrate 1, and the orthogonal projection area of ​​the aperture layer on the substrate 1 is greater than the orthogonal projection area of ​​the first pixel defining layer 7 on the substrate.

[0169] In some embodiments, the thickness of the second pixel defining layer 8 is three times or more the thickness of the aperture structure 5. Generally, the thickness of the second pixel defining layer is 6 μm; therefore, the thickness of the aperture structure can be set to less than or equal to 2 μm. It should be noted that a thicker aperture structure leads to a thicker overall display panel, which is not conducive to product thinning; however, if the aperture structure is too thin, it will affect the blocking effect. In practical applications, the thickness of the aperture structure can be designed and adjusted according to actual needs. Optionally, the thickness range of the aperture structure includes 1 μm to 2 μm. In practical applications, the thickness of the aperture structure can be designed according to actual light-blocking requirements.

[0170] Figure 9A This is another cross-sectional schematic diagram of a portion of the display panel provided in an embodiment of the present disclosure. Figure 9B Another cross-sectional schematic diagram of a portion of the display panel provided in the embodiments of this disclosure, such as... Figure 9A and Figure 9B As shown, in some embodiments, the display panel further includes: a second packaging structure 9, a color resist pattern array 11, and a third packaging structure 12.

[0171] The second packaging structure 9 is located on the side of the color control unit array 3 away from the first substrate 1. The second packaging structure 9 is configured to encapsulate at least a portion of the color space unit array in the color control unit array 3. The second packaging structure 9 uses a single-layer inorganic material film, such as silicon nitride or silicon oxide, or the second packaging structure 9 uses a stack of organic material film and inorganic material film. The second packaging structure 9 can prevent external moisture from entering the encapsulated color control units 3r, 3g, and 3b, thereby preventing external moisture from damaging the performance of the color control units 3r, 3g, and 3b.

[0172] It should be noted that the figure 9A only illustrates the case where the second packaging structure 9 encapsulates the color control units 3r, 3g, and 3b. This case is only for illustrative purposes and will not limit the technical solution of this disclosure.

[0173] The color resist pattern array 11 is located on the side of the second packaging structure 9 away from the first substrate 1. The color resist patterns 11r, 11g, and 11b in the color resist pattern array 11 correspond one-to-one with the color control units 3r, 3g, and 3b in the color control unit array 3. In some embodiments, the display panel also includes a black matrix 10 (BM) disposed on the same layer as the color resist pattern array 11. As an optional implementation, the color control unit 3r in the color control unit array 3 may specifically include: a red color conversion unit 3r, a green color conversion unit 3b, and a blue light transmission unit 3b. The color resist patterns in the color resist pattern array 11 may specifically include: a red color resist pattern 11r corresponding to the red color conversion unit 3r (located in the red subpixel area), a green color resist pattern 11g corresponding to the green color conversion unit 3g (located in the green subpixel area), and a blue color resist pattern 11b corresponding to the blue light transmission unit 3b (located in the blue subpixel area). The color resist patterns 11r, 11g, and 11b can filter the colors of the light emitted by the corresponding color control units 3r, 3g, and 3b, resulting in higher light purity and better color saturation in the corresponding subpixel areas, thereby improving the color display effect of the display panel.

[0174] The third encapsulation structure 12 is located on the side of the color resist pattern array 11 away from the first substrate 1, and is configured to encapsulate the color resist pattern array 11. Of course, the third encapsulation structure 12 can not only encapsulate the color resist pattern array 11, but also simultaneously encapsulate the entire display panel to prevent damage to the internal film layers of the display panel from external factors. In some embodiments, the material of the third encapsulation structure 12 can be a low-temperature transparent resin material.

[0175] In some embodiments, a cover plate (not shown) may be provided on the side of the third packaging structure 12 away from the first substrate 1, which can provide a certain degree of protection for the entire display panel.

[0176] Figure 9C This is another cross-sectional schematic diagram of a portion of the display panel provided in an embodiment of the present disclosure. Figure 9D Another cross-sectional schematic diagram of a portion of the display panel provided in the embodiments of this disclosure, such as... Figure 9C and Figure 9D As shown, Figure 9A and Figure 9B The second packaging structure 9 shown differs from the case where all three components (red color conversion unit 3r, green color conversion unit 3b, and blue light transmission unit 3b) are packaged. Figure 9C and Figure 9DThe second packaging structure 9 is shown in the case where only the color conversion unit is packaged, that is, the color conversion unit packages the red color conversion unit 3r and the green color conversion unit 3b, but does not package the blue light transmission unit 3b.

[0177] In practical applications, the second packaging structure 9 can be used to selectively package at least some of the color control units in the color control unit array. Specific examples will not be described here.

[0178] Figure 10A This is another cross-sectional schematic diagram of a portion of the display panel provided in an embodiment of the present disclosure. Figure 10B This is another cross-sectional schematic diagram of a portion of the display panel provided in an embodiment of the present disclosure; as shown below. Figure 10A and Figure 10B As shown, unlike the display panel in the previous embodiment which is a display panel with layers of films stacked sequentially, Figure 10A and Figure 10B The display panel shown is a cascaded display panel. Specifically, the display substrate is obtained by cascading a first display substrate 22 and a second display substrate 21; wherein, the first display substrate 22 includes: a first substrate 1 and a light-emitting unit array 2 located on the first substrate 1, and the second display substrate 21 includes: a second substrate 20 and a color control unit array 3 located on the second substrate 20.

[0179] After the first display substrate 22 and the second display substrate 21 are assembled, a first encapsulation structure 4, an encapsulation layer, and a second encapsulation structure 9 are formed between the light-emitting unit array 2 and the color control unit array 3. The first encapsulation structure 4 is configured to encapsulate the light-emitting unit array 2, the second encapsulation structure 9 is configured to encapsulate at least some of the color control units in the color control unit array 3, and the filling layer 24 is configured to fill the gap between the first display substrate 22 and the second display substrate 21. Additionally, a sealing dam 23 (Dam) may be provided in the peripheral area of ​​the first substrate 1 and the second substrate 20, and the filling layer 24 may fill the gap between the sealing dam 23 and the first display substrate 22 and the second display substrate 21.

[0180] It should be noted that, Figure 10A and Figure 10B The illustration only shows the case where the second packaging structure 9 encapsulates all color control units in the color control unit array 3. This is merely an example and does not limit the technical solution of this disclosure. In practical applications, the second packaging structure 9 can be used to selectively encapsulate at least some of the color control units in the color control unit array.

[0181] See also Figure 10AAs shown, the aperture structure 5 is embedded within the first encapsulation structure 4; for details, please refer to the previous description. Figure 7 The relevant descriptions will not be repeated here.

[0182] See also Figure 10B As shown, the aperture structure 5 is located between the first encapsulation structure 4 and the color control unit array. Optionally, the aperture structure 5 is located between the first encapsulation structure 4 and the filling layer 24, and the aperture structure 5 is in contact with the filling layer 24; that is, the aperture structure is fabricated on the first display substrate 22.

[0183] In some embodiments, a color resist pattern array is disposed between the second substrate 20 and the color control unit array 3. For a description of the color resist pattern array 11, please refer to the corresponding content in the previous embodiments; it will not be repeated here.

[0184] It should be noted that, for Figure 10A and Figure 10B For a description of the relative position, shape, size, and other related aspects of the light-transmitting unit 5a and its corresponding light-emitting unit 2a and color conversion unit, please refer to the previous section. Figure 5 and Figure 6 The relevant descriptions will not be repeated here.

[0185] Referring again to the accompanying drawings, in some embodiments, at least one dielectric layer is disposed between the aperture structure 5 and the light-emitting unit 2a.

[0186] The distance s between the light-transmitting unit 5a and the light-emitting unit 2a corresponding to the light-transmitting unit 5a on the first substrate 1 is such that the side edge of the projection on the first substrate 1 is the same as the side edge of the projection on the first substrate 1. The distance s between the two satisfies: s = L2 - L1.

[0187] Wherein, L1 is the spacing between adjacent light-emitting units 2a, and L2 is the offset when the light emitted by the light-emitting unit 2a at a preset angle reaches the layer structure where the aperture structure 5 is located.

[0188]

[0189] M represents the number of dielectric layers between aperture structure 5 and light-emitting unit 2a, d i θ is the thickness of the i-th dielectric layer located between the aperture structure 5 and the light-emitting unit 2a and close to the light-emitting unit 2a. i The angle between the propagation direction of the light emitted by the light-emitting unit 2a at a preset angle and the normal of the first substrate 1 when the light reaches the i-th dielectric layer is θ1, which is equal to the preset angle. i Let be the refractive index of the i-th dielectric layer.

[0190] by Figure 7 , Figure 9A , Figure 10A The situation shown is an example. Figure 11 for Figure 7 Figure 9 Figure 10A The diagram shows a cross-sectional view of a portion of the aperture structure and light-emitting unit within the display panel, as shown. Figure 11 As shown, a dielectric layer is disposed between the aperture structure 5 and the light-emitting unit 2a, specifically a first inorganic encapsulation layer 401.

[0191] At this time, the light emitted by the light-emitting unit 2a, pointing towards the color control units 3r, 3g, and 3b that are not corresponding to the light-emitting unit 2a, and with an emission angle of a preset angle, will have an offset L2 = d1 * tanθ1 when it reaches the aperture structure 5, where d1 is the thickness of the first inorganic encapsulation layer 401 and θ1 is the preset angle. To configure the aperture structure 5 to block light emitted by a certain light-emitting unit 2a that points towards the color control units 3r, 3g, and 3b that are not corresponding to the light-emitting unit 2a, and with an emission angle less than or equal to the preset angle, the distance s between the edge of the orthogonal projection of the light-transmitting unit 5a on the first substrate 1 and the edge of the orthogonal projection of the light-emitting unit 2a corresponding to the light-transmitting unit 5a on the first substrate 1 satisfies:

[0192] s≥d1*tanθ1-L1

[0193] by Figure 8 , Figure 9B , Figure 10B The situation shown is an example. Figure 12 for Figure 8 , Figure 9B , Figure 10B The diagram shows a cross-sectional view of a portion of the aperture structure 5 and the light-emitting unit 2a within the display panel, as shown. Figure 12 As shown, three dielectric layers are disposed between the aperture structure 5 and the light-emitting unit 2a, specifically a first inorganic encapsulation layer 401, an organic encapsulation layer 402, and a second inorganic encapsulation layer 403.

[0194] At this time, the light emitted by the light-emitting unit 2a, which is directed to the color control units 3r, 3g, and 3b that are not corresponding to the light-emitting unit 2a, and whose emission angle is a preset angle, will have an offset L2 when it reaches the aperture structure 5:

[0195] L2=d1*tanθ1+d2*tanθ2+d3*tanθ3

[0196] Where d1, d2, and d3 are the thicknesses of the first inorganic encapsulation layer 401, the organic encapsulation layer 402, and the second inorganic encapsulation layer 403, respectively; θ1 is a preset angle; θ2 is the angle between the propagation direction of the light emitted by the light-emitting unit 2a at the preset angle and the normal of the first substrate 1 when it reaches the interior of the organic encapsulation layer 402; and θ3 is the angle between the propagation direction of the light emitted by the light-emitting unit 2a at the preset angle and the normal of the first substrate 1 when it reaches the interior of the second inorganic encapsulation layer 403.

[0197] To achieve the configuration of the aperture structure 5 to block light emitted from a certain light-emitting unit 2a that is directed towards a color control unit 3r, 3g, 3b that is not corresponding to that light-emitting unit 2a, and whose emission angle is less than or equal to a preset angle, the distance s between the edge of the orthogonal projection of the light-transmitting unit 5a on the first substrate 1 and the edge of the orthogonal projection of the light-emitting unit 2a corresponding to the light-transmitting unit 5a on the first substrate 1 satisfies:

[0198] s≥L2=d1*tanθ1+d2*tanθ2+d3*tanθ3-L1

[0199] exist Figure 11 and Figure 12 In order to ensure that at least part of the light emitted by the light-emitting unit 2a can reach the color control units 3r, 3g, and 3b corresponding to the light-emitting unit 2a (i.e., to form the light-transmitting unit 5a), 2s should be less than the width L3 of the light-emitting unit 2a in the preset direction (the specific value can be preset according to actual needs), that is, s < L3 / 2.

[0200] Generally, given a fixed value for L3 and the condition that s ≥ L2 - L1, the larger s is, the more the aperture structure 5 blocks the corresponding light-emitting unit 2a, the smaller the size of the light-transmitting unit 5a, the less light emitted by the light-emitting unit 2a can reach the corresponding color control units 3r, 3g, and 3b, and the lower the utilization rate of the light emitted by the light-emitting unit 2a. Therefore, s = L2 - L1 is preferred.

[0201] It should be noted that, Figure 11 and Figure 12 The examples shown are for illustrative purposes only and do not limit the technical solutions of this disclosure.

[0202] In some embodiments, a driving layer 6 is further provided between the first substrate 1 and the light-emitting unit 2a. The driving layer 6 includes a driving circuit for driving the light-emitting unit 2a to emit light. The driving circuit includes a thin-film transistor (including a driving transistor). The thin-film transistor can be an oxide thin-film transistor or a low-temperature polysilicon (LTPS) thin-film transistor. The specific process is conventional technology in the art and will not be described in detail here.

[0203] Based on the same inventive concept, this disclosure also provides a display device, which includes the display panel provided in any of the preceding embodiments. A description of the display panel can be found in the preceding embodiments and will not be repeated here. In some embodiments, the display device may be a quantum dot display device.

[0204] Based on the same inventive concept, this disclosure also provides a method for preparing a display panel, which can be used to prepare the display panel provided in the preceding embodiments. Figure 13 A flowchart illustrating a method for manufacturing a display panel according to an embodiment of this disclosure is shown below. Figure 13 As shown, the method for manufacturing this display panel includes:

[0205] Step S101: Form an array of light-emitting units on the first substrate.

[0206] Step S102: An aperture structure is formed on the side of the light-emitting unit array away from the first substrate. The aperture structure has multiple light-transmitting units that correspond one-to-one with the light-emitting units in the light-emitting unit array.

[0207] Step S103: A color control unit array is formed on the side of the aperture structure away from the first substrate, and the color control units in the color control unit array correspond one-to-one with the light-emitting units in the light-emitting unit array.

[0208] Wherein, the orthographic projection of the light-emitting unit on the first substrate completely covers the orthographic projection of the light-transmitting unit corresponding to the light-emitting unit on the first substrate, and the orthographic projection area of ​​the light-emitting unit on the first substrate is larger than the orthographic projection area of ​​the light-transmitting unit corresponding to the light-emitting unit on the first substrate; the aperture structure is configured to block the light emitted by the light-emitting unit and pointing to the color control unit not corresponding to the light-emitting unit, and to make part of the light emitted by the light-emitting unit and pointing to the color control unit corresponding to the light-emitting unit be transmitted at the light-transmitting unit corresponding to the light-emitting unit.

[0209] For a detailed description of steps S101 and S102 above, please refer to the corresponding content in the previous embodiments, which will not be repeated here.

[0210] Figure 14A flowchart of another method for manufacturing a display panel provided in this disclosure embodiment is shown below. Figure 14 As shown, the preparation method includes:

[0211] Step S201: Form a driving layer on the first substrate.

[0212] Figure 15 A cross-sectional schematic diagram of the intermediate structure of the display panel obtained after performing step S201, as shown below. Figure 15 As shown, a driving layer 6 is fabricated on the first substrate 1 using a thin film transistor (TFT) array process. The driving layer 6 includes a driving circuit for driving the corresponding light-emitting unit to emit light.

[0213] Step S202: Form a first pixel definition layer and a light-emitting unit array on the driving layer.

[0214] Figure 16 A cross-sectional schematic diagram of the intermediate structure of the display panel obtained after performing step S202, as shown below. Figure 16 As shown, a first pixel defining layer 7 is first fabricated, and multiple first pixel receiving holes corresponding one-to-one with the sub-pixel regions are provided on the first pixel defining layer 7. Then, the light-emitting unit 2a is fabricated within the first pixel receiving holes. Taking an organic light-emitting diode (OLED) as an example, the anode of the OLED and the drain of the driving transistor are shared on the same layer. In this case, only an organic functional layer and a cathode capable of emitting light need to be fabricated within the first receiving holes. The organic functional layer includes at least an organic light-emitting layer, and of course, functional film layers such as hole transport layer, hole blocking layer, electron transport layer, and electron blocking layer can be set according to actual needs.

[0215] Generally, each light-emitting unit 2a is configured with a corresponding driving circuit, which includes a driving transistor. The driving circuit is electrically connected to the corresponding light-emitting unit to drive the light-emitting unit to emit light. In some embodiments, the anode of the organic light-emitting diode is made of a metal material (such as molybdenum, aluminum, etc.) so that the anode serves as a reflective electrode, and the cathode is made of a transparent conductive material (such as indium tin oxide, indium gallium zinc oxide, etc.).

[0216] Step S203: Form the first encapsulation structure and the aperture structure.

[0217] Figure 17 A cross-sectional schematic diagram of the intermediate structure of the display panel obtained after performing step S203, as shown below. Figure 17 As shown, in this embodiment of the disclosure, the aperture structure 5 can be embedded within the first encapsulation structure 4 (see...). Figure 17 As shown in the figure, it can also be located on the first packaging structure 4 (the corresponding figure is not shown here).

[0218] The first packaging structure and the aperture structure are formed by embedding the aperture structure 5 within the first packaging structure 4. Figure 7 Take the situation shown in Figure 9 as an example. Figure 18 Here is a flowchart of an optional implementation method of step S203 in this disclosure, as follows: Figure 18 As shown, step S203 specifically includes:

[0219] Step S2031a: Form a first inorganic encapsulation layer on the side of the light-emitting unit array away from the first substrate.

[0220] The first inorganic encapsulation layer can be obtained by depositing silicon oxide and / or silicon nitride materials through a CVD process, with a thickness of 0.6 μm to 1.2 μm.

[0221] Step S2032a: An aperture structure is formed on the side of the first inorganic encapsulation layer away from the first substrate.

[0222] Before step S2032a, since there is only one first inorganic encapsulation layer 401 above the light-emitting unit, the inorganic encapsulation layer has a poor effect on blocking water. Therefore, conventional photolithography is used to prepare the aperture structure 5, which easily leads to water vapor intruding into the light-emitting unit, resulting in defects.

[0223] To prevent moisture from entering the light-emitting unit during the fabrication of the aperture structure 5, inkjet printing is preferably used in this embodiment. More preferably, a light-shielding resin material is formed in the area where the aperture structure 5 is to be formed using inkjet printing under a nitrogen atmosphere. Compared to conventional inkjet printing under an air atmosphere, the nitrogen atmosphere used in this embodiment effectively prevents moisture from entering the light-emitting unit.

[0224] At this time, the specific steps for forming the aperture structure 5 may include: first, surface treatment of the side surface of the first inorganic encapsulation layer 401 away from the first substrate 1, so that the side surface of the first inorganic encapsulation layer 401 away from the first substrate 1 is hydrophilic in the area where the aperture structure 5 is to be formed, and / or the side surface of the first inorganic encapsulation layer 401 away from the first substrate 1 is hydrophobic in the area outside the area where the light-transmitting unit is to be formed; then, under a nitrogen atmosphere, forming a resin material with light-shielding function in the area where the aperture structure 5 is to be formed by inkjet printing process; next, curing treatment of the resin material to obtain the aperture structure 5.

[0225] Before inkjet printing, the surface of the first inorganic encapsulation layer 401 away from the first substrate 1 is treated to make the area to be formed of the aperture structure 5 hydrophilic and / or the area to be formed of the light-transmitting unit hydrophobic. This allows for precise positioning of the resin material ejected during inkjet printing. The resin material ejected during inkjet printing has a viscosity of approximately 10 cp and a surface tension of approximately 35 mN / m. This resin material is a light-shielding material, such as a black resin. After the resin material has cured, the OD value of the resulting aperture structure 5 should be greater than 1.

[0226] Step S2033a: An organic encapsulation layer is formed on the side of the aperture structure away from the first substrate.

[0227] In step S2033a, an organic encapsulation layer 402 can be obtained by inkjet printing a transparent resin material. The thickness of the organic encapsulation layer 402 is 6μm to 8μm, and the organic encapsulation layer 402 can also play a planarization role.

[0228] Step S2034a: A second inorganic encapsulation layer is formed on the side of the organic encapsulation layer away from the first substrate.

[0229] In step S2034a, the second inorganic encapsulation layer 403 can be obtained by depositing silicon oxide and / or silicon nitride materials through a CVD process, with a thickness of 0.6 μm to 1.2 μm.

[0230] Figure 19 Here is a flowchart of another optional implementation method of step S203 in this disclosure, as follows: Figure 19 As shown, step S203 specifically includes:

[0231] Step S2031b: Form the first packaging structure.

[0232] The steps for forming the first encapsulation structure 4 include: forming a first inorganic encapsulation layer, forming an organic encapsulation layer, and forming a second inorganic encapsulation layer.

[0233] Step S2032b: An aperture structure is formed on the side of the first packaging structure away from the first substrate.

[0234] The step of forming the aperture structure 5 includes: forming the aperture structure 5 on the side of the first packaging structure 4 away from the first substrate by inkjet printing or photolithography.

[0235] Since the aperture structure 5 is fabricated after the first encapsulation structure 4, the first encapsulation structure 4 has already completed the effective encapsulation of the light-emitting unit and has a better water vapor barrier effect. Therefore, the aperture structure 5 can be fabricated not only by inkjet printing process but also by photolithography process.

[0236] Step S204: Form a second pixel definition layer, a color control unit array, and a second encapsulation structure.

[0237] Figure 20 A cross-sectional schematic diagram of the intermediate structure of the display panel obtained after performing step S204, as shown below. Figure 20 As shown, in step S204, a second pixel defining layer 8 is first prepared, and a plurality of second pixel receiving holes corresponding one-to-one with the sub-pixel areas are provided on the second pixel defining layer 8. Then, the color control units 3r, 3g, and 3b are prepared in the first pixel receiving holes. Next, a second packaging structure 9 is formed on the side of the color control unit array away from the first substrate.

[0238] In some embodiments, the materials of the color control units 3r, 3g, and 3b in the color control unit array 3 include quantum dot materials. Taking the case where the subpixel region includes a red subpixel region, a green subpixel region, and a blue subpixel region as an example, red color conversion unit 3r, green color conversion unit 3g, and blue light transmission unit 3b can be fabricated in the red subpixel region, green subpixel region, and blue subpixel region, respectively.

[0239] In some embodiments, the thickness of the color control units 3r, 3g, and 3b is between 6 μm and 15 μm.

[0240] The second encapsulation structure 9 uses a single-layer inorganic material film, such as silicon nitride or silicon oxide, or the second encapsulation structure 9 uses a stack of organic material film and inorganic material film; the second encapsulation structure 9 can prevent external moisture from entering the color control unit, thereby preventing external moisture from damaging the performance of the color control unit.

[0241] Figure 21 This is another cross-sectional view of the intermediate structure of the display panel obtained after performing step S204, and... Figure 20 The second packaging structure shown differs from the case where all color control units 3r, 3g, and 3b in the color control unit array 3 are packaged. Figure 21 The second encapsulation structure shown can encapsulate only a portion of the color control unit. In this case, during step S204, the portion of the color control unit that needs to be encapsulated by the second encapsulation structure 9 can be prepared first within a portion of the first pixel receiving hole, and then the second encapsulation structure can be prepared, followed by the color control unit that does not need to be encapsulated by the second encapsulation structure 9.

[0242] by Figure 21The second encapsulation structure shown here only encapsulates the red color conversion unit 3r and the green color conversion unit 3g, and does not encapsulate the blue light transmission unit 3b. The red color conversion unit 3r and the green color conversion unit 3g can be fabricated first, then the second encapsulation structure 9 can be fabricated, and finally the blue light transmission unit 3b can be fabricated.

[0243] Step S205: Form a black matrix and a color resist pattern matrix on the second packaging structure.

[0244] Figure 22 A cross-sectional schematic diagram of the intermediate structure of the display panel obtained after performing step S205, as shown below. Figure 22 As shown, as an optional implementation, the color control unit array 3 may specifically include a red color conversion unit 3r, a green color conversion unit 3g, and a blue light transmission unit 3b. The color resist pattern array 11 may specifically include: a red color resist pattern 11r corresponding to the red color conversion unit 3r (located in the red subpixel area), a green color resist pattern 11g corresponding to the green color conversion unit 3g (located in the green subpixel area), and a blue color resist pattern 11b corresponding to the blue light transmission unit 3b (located in the blue subpixel area). The color resist patterns 11r, 11g, and 11b can filter the light emitted by their respective color control units 3r, 3g, and 3b, resulting in higher light purity and better color saturation in the corresponding subpixel areas, thereby improving the color display effect of the display panel.

[0245] Step S206: Form a third packaging structure on the side of the color resist pattern matrix away from the first substrate.

[0246] See Figures 9A to 9D As shown, the material of the third encapsulation structure 12 can be a low-temperature transparent resin material; the third encapsulation structure 12 can not only encapsulate the color resist pattern array 11, but also encapsulate the entire display panel at the same time, so as to avoid damage to the film layers inside the display panel by external factors.

[0247] Figure 23 A flowchart illustrating another method for manufacturing a display panel provided in this disclosure embodiment is shown below. Figure 23 As shown, the preparation method includes:

[0248] Step S301: Prepare the first display substrate.

[0249] Figure 24 A cross-sectional schematic diagram of the first display substrate obtained after performing step S301, as shown below. Figure 24As shown, steps S201 to S203 in the aforementioned embodiments can be used to fabricate the driving layer 6, the first pixel defining layer 7, the light-emitting unit array 2, the first encapsulation structure 4, and the aperture structure 5 on the first substrate to obtain the first display substrate 22. For the specific fabrication process, please refer to the relevant descriptions of steps S201 to S203 in the previous embodiments, which will not be repeated here. The aperture structure 5 can be embedded within the first encapsulation structure 4 (see...). Figure 24 As shown in the figure, it can also be located on the first packaging structure 4 (the corresponding figure is not shown here).

[0250] Step S302: Prepare the second display substrate.

[0251] Figure 25 A cross-sectional schematic diagram of the second display substrate obtained after performing step S302, as shown below. Figure 25 As shown, a black matrix 10, a color resist pattern array 11, a second pixel defining layer 8, a color control unit array 3, and a second packaging structure 9 are formed on the second substrate to obtain the second display substrate 21.

[0252] The technical solution disclosed herein does not impose any limitation on the execution order of steps S301 and S302.

[0253] Step S303: Align the first display substrate with the second display substrate.

[0254] See Figure 10A and Figure 10B As shown, the first display substrate 22 and the second display substrate 21 are assembled to obtain a display panel.

[0255] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A display panel, comprising: First substrate; The system comprises an array of light-emitting units and an array of color control units. The color control unit array is located on the side of the light-emitting unit array away from the first substrate. Each color control unit in the color control unit array corresponds one-to-one with a light-emitting unit in the light-emitting unit array. Each light-emitting unit emits a preset color light. Each color control unit in the color control unit array is selected from either a color conversion unit or a light transmission unit. The color conversion unit is configured to convert the preset color light into other colors. The light transmission unit is configured to allow the preset color light to be transmitted. Among them, at least some of the light-emitting units are configured with corresponding aperture structures, the aperture structures are located between the light-emitting units and the color control unit, and light-transmitting units are formed on the aperture structures; The orthographic projection of the light-transmitting unit on the substrate overlaps with the orthographic projection of the light-emitting unit corresponding to the light-transmitting unit on the first substrate, and the orthographic projection area of ​​the light-transmitting unit on the first substrate is smaller than the orthographic projection area of ​​the light-emitting unit corresponding to the light-transmitting unit on the first substrate. The aperture structure is configured to block the light emitted by the light-emitting unit and directed towards the color control unit that is not corresponding to the light-emitting unit, and to allow a portion of the light emitted by the light-emitting unit and directed towards the color control unit corresponding to the light-emitting unit to be transmitted at the light-transmitting unit corresponding to the light-emitting unit; The display panel also includes: A first encapsulation structure is located between the light-emitting unit array and the color control unit array, and the first encapsulation structure is configured to encapsulate the light-emitting unit array; the aperture structure is embedded within the first encapsulation structure; the first encapsulation structure includes: a first inorganic encapsulation layer and an organic encapsulation layer located on the side of the first inorganic encapsulation layer away from the first substrate and in contact with the first inorganic encapsulation layer; the aperture structure is located between the first inorganic encapsulation layer and the organic encapsulation layer; a first inorganic encapsulation layer and an organic encapsulation layer in contact with the surface of the first inorganic encapsulation layer away from the first substrate constitute a repeating encapsulation unit, and the first encapsulation structure includes at least two repeating encapsulation units stacked along the normal direction of the first substrate, and the aperture structure is located within any one of the repeating encapsulation units. The second pixel defining layer has a second pixel receiving hole array, wherein the second pixel receiving holes in the second pixel receiving hole array correspond one-to-one with the color control units in the color control unit array, and the color control units in the color control unit array are located in the corresponding second pixel receiving holes. The second packaging structure is located on the side of the color control unit away from the first substrate. The second packaging structure is configured to encapsulate the color conversion unit in the color control unit array. The light transmission unit in the color control unit array is located on the side of the second packaging structure opposite to the first substrate. A color resist pattern array is located on the side of the second packaging structure away from the first substrate, and the color resist patterns in the color resist pattern array correspond one-to-one with the color control units in the color control unit array; A third packaging structure is located on the side of the color resist pattern array away from the first substrate. The third packaging structure is configured to encapsulate the side surface of the color resist pattern array and its surface away from the first substrate, the side surface of the second packaging structure, and the side surface of the second pixel defining layer.

2. The display panel according to claim 1, wherein, The orthographic projection of the light-transmitting unit on the substrate is located within the orthographic projection of the light-emitting unit corresponding to the light-transmitting unit on the substrate.

3. The display panel according to claim 2, wherein, The aperture structure is specifically configured to block light emitted by the light-emitting unit that is directed towards the color control unit that is not corresponding to the light-emitting unit and whose emission angle is less than or equal to a preset angle. The emission angle of the light is the angle between the light and the normal of the first substrate. At least one dielectric layer is disposed between the aperture structure and the light-emitting unit; The distance s between the edge of the orthogonal projection of the light-transmitting unit on the first substrate and the edge of the orthogonal projection of the light-emitting unit corresponding to the light-transmitting unit on the first substrate satisfies the following: s = L2 - L1; Wherein, L1 is the spacing between adjacent light-emitting units, and L2 is the offset when the light emitted by the light-emitting unit at the preset angle reaches the layer structure where the aperture structure is located; ， M is the number of dielectric layers between the aperture structure and the light-emitting unit, and d i The thickness of the i-th dielectric layer located between the aperture structure and the light-emitting unit, and close to the light-emitting unit. The angle between the propagation direction of the light emitted by the light-emitting unit at the preset angle and the normal of the first substrate when the light reaches the interior of the i-th dielectric layer. Equal to the preset angle, Let be the refractive index of the i-th dielectric layer.

4. The display panel according to claim 1, wherein, The orthographic projection of the light-transmitting unit on the first substrate and the orthographic projection of the light-emitting unit corresponding to the light-transmitting unit on the first substrate have the same shape and coincide in center.

5. The display panel according to claim 1, wherein, The orthographic projection of the light-transmitting unit on the first substrate and the orthographic projection of the color control unit corresponding to the light-transmitting unit on the first substrate have the same shape and coincide in center.

6. The display panel according to any one of claims 1 to 5, wherein, The color control unit is in contact with the first packaging structure.

7. The display panel according to claim 1, wherein, The aperture structure is located between the first packaging structure and the color control unit array.

8. The display panel according to claim 7, wherein, The aperture structure is in contact with the color control unit.

9. The display panel according to claim 1, wherein, The orthographic projection of the light-transmitting unit on the substrate is located within the orthographic projection of the color control unit corresponding to the light-transmitting unit on the substrate.

10. The display panel according to claim 9, wherein, The orthographic projection of the light-emitting unit on the substrate is located within the orthographic projection of the color control unit corresponding to the light-emitting unit on the substrate.

11. The display panel according to claim 3, wherein, The preset angle is less than or equal to 60°.

12. The display panel according to claim 1, wherein, The optical density of the portion of the aperture structure located outside the area of ​​the light-transmitting unit is greater than 1.

13. The display panel according to claim 1, wherein, The thickness of the second pixel defining layer is three times or more the thickness of the aperture structure.

14. The display panel according to claim 1, wherein, The slope angle of the sidewalls of the aperture structure used to form the light-transmitting unit is 30° to 90°.

15. The display panel according to claim 14, wherein, The slope angle of the sidewalls of the aperture structure used to form the light-transmitting unit is 60° to 90°.

16. The display panel according to claim 1, wherein, The material of the aperture structure includes: a resin material with light-shielding function.

17. The display panel according to claim 1, wherein, The color conversion unit is made of quantum dot materials; The material of the light transmission unit includes transparent resin and scattering particles distributed within the transparent resin.

18. The display panel according to claim 1, wherein, Also includes: The first pixel defining layer has a first pixel receiving hole array, wherein the first pixel receiving hole in the first pixel receiving hole array corresponds one-to-one with the light-emitting unit in the light-emitting unit array, and the light-emitting unit is located in the corresponding first pixel receiving hole.

19. The display panel according to claim 18, wherein, The display panel includes an aperture layer, the aperture layer includes a plurality of aperture structures corresponding one-to-one with the light-emitting unit, and the light-transmitting unit on the aperture structure is a light-transmitting hole; The orthogonal projection of the aperture layer on the substrate completely covers the orthogonal projection of the first pixel defining layer on the substrate, and the orthogonal projection area of ​​the aperture layer on the substrate is greater than the orthogonal projection area of ​​the first pixel defining layer on the substrate.

20. A display device, wherein, include: The display panel as described in any one of claims 1 to 19 above.

21. A method for manufacturing a display panel, wherein, The preparation method is used to prepare a display panel as described in any one of claims 1 to 19 above, and the preparation method includes: An array of light-emitting units is formed on a first substrate. An aperture structure is formed on the side of the light-emitting unit array away from the first substrate, which is at least part of the light-emitting units. A light-transmitting unit is formed on the aperture structure. The orthographic projection of the light-transmitting unit on the substrate overlaps with the orthographic projection of the light-emitting unit corresponding to the light-transmitting unit on the first substrate. The orthographic projection area of ​​the light-transmitting unit on the first substrate is smaller than the orthographic projection area of ​​the light-emitting unit corresponding to the light-transmitting unit on the first substrate. A color control unit array is formed, located on the side of the aperture structure away from the first substrate. Each color control unit in the color control unit array corresponds one-to-one with a light-emitting unit in the light-emitting unit array. The light-emitting unit emits a preset color light. Each color control unit in the color control unit array is selected from either a color conversion unit or a light transmission unit. The color conversion unit is configured to convert the preset color light into other colors. The light transmission unit is configured to allow the preset color light to be transmitted. The aperture structure is configured to block the light emitted by the light-emitting unit and directed towards the color control unit that is not corresponding to the light-emitting unit, and to allow a portion of the light emitted by the light-emitting unit and directed towards the color control unit corresponding to the light-emitting unit to be transmitted at the light-transmitting unit corresponding to the light-emitting unit; The preparation method further includes: A second pixel defining layer is formed, the second pixel defining layer has a second pixel receiving hole array, the second pixel receiving hole in the second pixel receiving hole array corresponds one-to-one with the color control unit in the color control unit array, and the color control unit in the color control unit array is located in the corresponding second pixel receiving hole; A second packaging structure is formed, the second packaging structure is located on the side of the color control unit away from the first substrate, the second packaging structure is configured to encapsulate the color conversion unit in the color control unit array, and the light transmission unit in the color control unit array is located on the side of the second packaging structure opposite to the first substrate. A color resist pattern array is formed, the color resist pattern array is located on the side of the second packaging structure away from the first substrate, and the color resist patterns in the color resist pattern array correspond one-to-one with the color control units in the color control unit array; A third packaging structure is formed, the third packaging structure being located on the side of the color resist pattern array away from the first substrate, the third packaging structure being configured to encapsulate the side surface of the color resist pattern array and its surface away from the first substrate, the side surface of the second packaging structure, and the side surface of the second pixel defining layer. Between the step of forming the light-emitting unit array and the step of forming the color control unit array, the following is also included: Forming the first packaging structure; The steps of forming the first packaging structure and forming the aperture structure specifically include: Forming the first inorganic encapsulation layer; A first inorganic encapsulation layer is formed on the side of the light-emitting unit array away from the first substrate. An aperture structure is formed on the side of the first inorganic encapsulation layer away from the first substrate. An organic encapsulation layer is formed on the side of the aperture structure away from the first substrate.

22. The preparation method according to claim 21, wherein, The steps to form the aperture structure include: The surface of the first inorganic encapsulation layer away from the first substrate is surface treated such that the surface of the first inorganic encapsulation layer away from the first substrate is hydrophilic in the area where the aperture structure is to be formed, and / or the surface of the first inorganic encapsulation layer away from the first substrate is hydrophobic in the area where the light-transmitting unit is to be formed. In a nitrogen atmosphere, a light-shielding resin material is formed in the area where the aperture structure is to be formed using an inkjet printing process. The resin material is cured to obtain the aperture structure.

23. The preparation method according to claim 21, wherein, The display panel is the display panel of claim 7, and after the step of forming the light-emitting unit array, it further includes: Forming the first packaging structure; The steps to form the aperture structure include: The aperture structure is formed on the side of the first packaging structure away from the first substrate using inkjet printing or photolithography.

Images