Display panel and manufacturing method thereof, and display device

Abstract

The present invention discloses a display panel and a preparation method thereof, and a display device. The display panel includes: a pixel defining layer arranged on a base substrate, the pixel defining layer includes a separator and a plurality of openings for accommodating sub-pixel units; an encapsulation layer arranged on the pixel defining layer and the sub-pixel units; a color filter layer arranged on the encapsulation layer, the color filter layer includes a light shielding layer arranged corresponding to the separator and a color resistance arranged corresponding to the sub-pixel unit; wherein the vertical distance between the sub-pixel unit and the base substrate gradually decreases from the edge to the center of the sub-pixel unit; and the vertical distance between the color resistance close to the sub-pixel unit and the base substrate gradually decreases from the edge to the center of the sub-pixel unit. The scheme disclosed in the present invention can improve the light extraction efficiency of the display panel, improve the visual color deviation problem of the display panel, and at the same time reduce the reflectivity of the display panel and increase the observability of the display panel.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of display technology, and in particular to a display panel and a manufacturing method thereof, and a display device. Background Art

[0002] Active-Matrix Organic Light-Emitting Diode (AMOLED) display technology is a display technology with great development prospects. The display panels made using this technology have the advantages of self-luminescence, ultra-lightness, wide viewing angle, fast response speed, low power consumption and flexible display, and are widely used in the display field.

[0003] Existing AMOLED display panels usually use a light shielding layer + color resistance structure to replace the traditional polarizer. However, in order to reduce the reflectivity of the display panel to a greater extent, the area of ​​the color resistance is usually reduced as much as possible and the area of ​​the light shielding layer is usually increased as much as possible. As a result, the black light shielding layer absorbs ambient light while also blocking the light emitted by the pixel, thus affecting the display effect of the display panel. Summary of the invention

[0004] The present invention provides a display panel and a preparation method thereof, and a display device, which can improve the light extraction efficiency of the display panel, improve the visual color deviation problem of the display panel, and at the same time reduce the reflectivity of the display panel and increase the observability of the display panel.

[0005] In a first aspect, an embodiment of the present invention provides a display panel, including:

[0006] A pixel defining layer is disposed on the base substrate, the pixel defining layer comprising a separator and a plurality of openings for accommodating sub-pixel units;

[0007] An encapsulation layer disposed on the pixel defining layer and the sub-pixel unit;

[0008] A color filter layer is arranged on the encapsulation layer, the color filter layer comprises a light shielding layer arranged corresponding to the separator and a color resist arranged corresponding to the sub-pixel unit;

[0009] Among them, the vertical distance between the sub-pixel unit and the substrate gradually decreases from its edge to the center; the vertical distance between the side of the color resistance close to the sub-pixel unit and the substrate gradually decreases from its edge to the center.

[0010] For the display panel as above, optionally, the vertical distance between the side of the color resist away from the sub-pixel unit and the substrate gradually decreases from the edge to the center thereof; or,

[0011] The vertical distance between the side of the color resist away from the sub-pixel unit and the substrate from the edge to the center is equal; or,

[0012] The vertical distance between the side of the color resist away from the sub-pixel unit and the substrate gradually increases from the edge to the center.

[0013] In the display panel as above, optionally, the orthographic projection of the light shielding layer on the base substrate covers the orthographic projection of the separator on the base substrate;

[0014] Preferably, the orthographic projection of the light shielding layer on the base substrate coincides with the orthographic projection of the separator on the base substrate.

[0015] In the display panel as above, optionally, in a direction away from the base substrate, the sub-pixel unit includes an anode, a light-emitting layer and a cathode;

[0016] The anode is spherical, and the distance between the anode and its corresponding color resistance is less than or equal to the radius of the sphere.

[0017] In the display panel as above, optionally, the sub-pixel unit includes a first color sub-pixel unit, a second color sub-pixel unit and a third color sub-pixel unit, the color resistance includes a first color resistance, a second color resistance and a third color resistance, the first color sub-pixel unit corresponds to the first color resistance, the second color sub-pixel unit corresponds to the second color resistance, and the third color sub-pixel unit corresponds to the third color resistance;

[0018] The width of the first color resist is greater than the width of the second color resist, and the width of the second color resist is greater than the width of the third color resist;

[0019] Preferably, the first color sub-pixel unit emits blue light, the second color sub-pixel unit emits red light, and the third color sub-pixel unit emits green light.

[0020] The display panel as above may, optionally, further include:

[0021] The touch layer is arranged between the encapsulation layer and the color filter layer.

[0022] In a second aspect, an embodiment of the present invention further provides a display device, which includes a display panel having any feature of the first aspect.

[0023] In a third aspect, an embodiment of the present invention further provides a method for manufacturing a display panel, comprising:

[0024] forming a thin film transistor layer on a substrate;

[0025] forming a pixel defining layer including a separator and a plurality of openings on the thin film transistor layer, and forming sub-pixel units in the openings;

[0026] forming an encapsulation layer on the pixel defining layer and the sub-pixel unit;

[0027] forming a touch layer on the encapsulation layer;

[0028] Forming a color filter layer on the touch layer, the color filter layer comprising a light shielding layer arranged corresponding to the separator and a color resist arranged corresponding to the sub-pixel unit;

[0029] Among them, the vertical distance between the sub-pixel unit and the substrate gradually decreases from its edge to the center; the vertical distance between the side of the color resistance close to the sub-pixel unit and the substrate gradually decreases from its edge to the center.

[0030] The method for preparing the display panel as above, optionally, forms a pixel defining layer including a separator and a plurality of openings on the thin film transistor layer, and forms sub-pixel units in the openings, comprising:

[0031] Depositing a layer of metal material on the thin film transistor layer, and forming a pixel defining layer including a separator and a plurality of openings on the metal material;

[0032] Performing a patterning process on the metal material exposed in the opening to obtain an anode;

[0033] A light emitting layer and a cathode are sequentially formed on the anode.

[0034] In the above method for preparing a display panel, optionally, forming a touch layer on the encapsulation layer includes:

[0035] forming a touch control body on the encapsulation layer;

[0036] The touch control body is patterned to form a groove corresponding to the sub-pixel unit so that the color resist fills the groove.

[0037] The present invention provides a display panel and a preparation method thereof, and a display device, which adopts a structure of a light-shielding layer and a color block, so that a color filter layer can replace a polarizer, and the structure of a sub-pixel unit and a color block is designed: 1. The vertical distance between the sub-pixel unit and the substrate gradually decreases from its edge to the center, which can not only increase the luminous area of ​​the sub-pixel unit, but also make the divergent light emitted by the sub-pixel unit converge toward the center, reducing the light irradiated on the light-shielding layer and reducing the light absorption of the light-shielding layer; 2. The vertical distance between the side of the color block close to the sub-pixel unit and the substrate gradually decreases from its edge to the center, which can re-converge the light that has not been converged into the color block, further reducing the light absorption of the light-shielding layer, so that more light can be taken out from the color block. At the same time, through the design of the light-shielding layer, the reflectivity of the display panel can be reasonably reduced, the observability of the display panel can be increased, and the display effect of the display panel can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic cross-sectional structure diagram of a display panel provided by an embodiment of the present invention;

[0039] Figure 2 is a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the present invention;

[0040] Figure 3 is a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the present invention;

[0041] Figure 4 is a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the present invention;

[0042] Figure 5 is a structural schematic diagram of a display device provided by an embodiment of the present invention;

[0043] Figure 6 It is a schematic flow chart of a method for preparing a display panel provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0044] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0045] At the same time, the description of the drawings and embodiments is illustrative rather than restrictive. The same reference numerals throughout the specification represent the same elements. In addition, for the sake of understanding and ease of description, the thickness of some layers, films, panels, regions, etc. may be exaggerated in the drawings. It is also understood that when an element such as a layer, film, region or substrate is referred to as "on" another element, the element may be directly on the other element or there may be an intermediate element. In addition, "on..." refers to positioning an element on another element or below another element, but does not essentially refer to positioning on the upper side of another element according to the direction of gravity. For ease of understanding, the elements are drawn on the upper side of another element in the drawings of the present invention.

[0046] In addition, unless explicitly described to the contrary, the word “comprise” and variations such as “include” or “have”, will be understood to imply the inclusion of such elements but not the exclusion of any other elements.

[0047] It should also be noted that the "and / or" mentioned in the embodiments of the present invention refers to any and all combinations including one or more related listed items. "First", "second", "third", etc. are used to describe various components in the embodiments of the present invention, but these components should not be limited by these terms. These terms are only used to distinguish one component from another component. And, unless the context clearly indicates otherwise, the singular forms "a", "a kind of" and "the ()" are also intended to include plural forms.

[0048] When a certain embodiment can be implemented differently, the specific process order can be performed differently from the described order. For example, two processes described successively can be performed substantially at the same time or in the reverse order of the described order.

[0049] In addition, the following embodiments are all illustrated by taking the display panel as a rectangle. In actual applications, the display panel can also be a regular or irregular shape such as a circle or a polygon, and the present invention does not impose specific restrictions on this. At the same time, in order to more clearly describe the color filter layer in the display panel, the sizes of the various structures in the display panel are adjusted accordingly in the following figures of the embodiments of the present invention.

[0050] Figure 1 A schematic cross-sectional structure diagram of a display panel provided by an embodiment of the present invention is shown. Exemplarily, the display panel includes: a base substrate 10; a pixel defining layer 20 disposed on the base substrate 10, the pixel defining layer 20 includes a separator 21 and a plurality of openings 22 for accommodating sub-pixel units 30, and adjacent openings 22 are separated by the separator 21.

[0051] The sub-pixel unit 30 includes, in a direction away from the substrate 10, an anode 31, a hole injection layer ( Figure 1 Not shown), hole transport layer ( Figure 1 Not shown), light-emitting layer 32, electron transport layer ( Figure 1 Not shown), electron injection layer ( Figure 1 ), cathode 33. The sub-pixel unit 30 can emit N different colors of light, that is, the sub-pixel unit 30 is divided into N categories, and each of the N categories of sub-pixel units 30 is combined to form a pixel unit; N ≥ 3, and N is an integer. For example, the sub-pixel unit 30 may include a first color sub-pixel unit, a second color sub-pixel unit, and a third color sub-pixel unit, the first color sub-pixel unit emits blue light, the second color sub-pixel unit emits red light, and the third color sub-pixel unit emits green light.

[0052] An encapsulation layer 40 is disposed on the pixel defining layer 20 and the sub-pixel unit 30; a color filter layer 50 is disposed on the encapsulation layer 40, and the color filter layer 50 includes a light shielding layer 51 disposed corresponding to the separator 21 and a color resist 52 disposed corresponding to the sub-pixel unit 30. Specifically, the color resist 52 includes a first color resist, a second color resist and a third color resist, the first color sub-pixel unit corresponds to the first color resist, the second color sub-pixel unit corresponds to the second color resist, and the third color sub-pixel unit corresponds to the third color resist. The color filter layer 50 can replace the polarizer, avoid the problem of reducing the light output efficiency of the display panel due to the polarization principle of the polarizer, and reduce the manufacturing cost of the display panel.

[0053] In one embodiment, the light shielding layer 51 may be a black matrix (BM). When ambient light irradiates the black matrix, the black matrix may absorb the ambient light, so that the ambient light irradiating the black matrix cannot enter the interior of the display panel.

[0054] Continue to refer Figure 1 It can be seen that the vertical distance between the sub-pixel unit 30 and the substrate 10 gradually decreases from the edge to the center. Figure 1 The anode 31 is concave toward the base substrate 10, and the light-emitting layer 32 and the cathode 33 above the anode 31 are also concave toward the base substrate 10, and the light-emitting area of ​​the light-emitting layer 32 is increased. When the sub-pixel unit 30 is working, the divergent light emitted by the light-emitting layer 32 converges toward the center, and the light is irradiated into the color resistance 52 as much as possible, reducing the light irradiated on the light shielding layer 51, reducing the light absorption of the light shielding layer 51, and improving the light extraction efficiency of the display panel.

[0055] At the same time, the vertical distance between the color resist 52 and the substrate 10 gradually decreases from the edge to the center of the side close to the sub-pixel unit 30. Figure 1 The middle encapsulation layer 40 has a groove in the area corresponding to the sub-pixel unit 30, and the color resist 52 fills the groove (that is, the lower surface of the color resist 52 is convex toward the base substrate 10). In this way, the light that is not converged into the color resist 52 can be re-converged, further reducing the absorption of light by the shading layer 51, so that more light can be taken out from the color resist 52, thereby improving the light output efficiency of the display panel.

[0056] Understandably, Figure 1 In the display panel shown, the vertical distance between the side of the color resist 52 away from the sub-pixel unit 30 and the substrate 10 from the edge to the center is equal. That is, when light is emitted from the color resist 52, the path of the light will not change.

[0057] In order to make the light output more balanced, the embodiment of the present invention can also design the shape of the side of the color resist 52 away from the sub-pixel unit 30. Specifically, Figure 2FIG. 2 shows a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the present invention. Figure 3 A schematic cross-sectional structure diagram of another display panel provided by an embodiment of the present invention is shown.

[0058] and Figure 1 The display panel shown is different in that Figure 2 In the display panel shown, the vertical distance between the color resist 52 and the base substrate 10 gradually decreases from the edge to the center of the side away from the sub-pixel unit 30. In this way, according to the lens principle, when light is emitted from the color resist 52, the path of the light diverges to the surroundings, making the emitted light more balanced, improving the visual color cast problem of the display panel, and achieving the purpose of improving the display effect of the display panel.

[0059] and Figure 1 The display panel shown is different in that Figure 3 In the display panel shown, the vertical distance between the color resist 52 and the base substrate 10 gradually increases from the edge to the center of the side away from the sub-pixel unit 30. In this way, according to the lens principle, when light is emitted from the color resist 52, the path of the light diverges to the surroundings, making the emitted light more balanced, improving the visual color cast problem of the display panel, and achieving the purpose of improving the display effect of the display panel.

[0060] In one embodiment, the orthographic projection of the light-shielding layer 51 on the base substrate 10 covers the orthographic projection of the separator 21 on the base substrate 10; the aperture of the light-shielding layer 51 is relatively large (that is, the aperture of the color resist 52 is relatively small), which can ensure the light-shielding layer 51's absorption effect on external natural light and reduce the reflectivity of the display panel.

[0061] Optionally, the orthographic projection of the light shielding layer 51 on the base substrate 10 coincides with the orthographic projection of the separator 21 on the base substrate 10. In this way, the light shielding layer 51 can absorb the external natural light and reduce the reflectivity of the display panel, while ensuring the aperture ratio of the display panel and improving the light extraction efficiency of the display panel.

[0062] In one embodiment, in order to ensure that the light emitted by the light-emitting layer 32 can be projected into the color resist 52, when the anode 31 is spherical, the distance between the anode 31 and its corresponding color resist 52 is less than or equal to the radius of the spherical surface. In the present invention, the distance between the anode 31 and its corresponding color resist 52 is the distance from the surface of the anode 31 close to the base substrate 10 to the center of the corresponding color resist 52.

[0063] Among blue light, red light and green light, the human eye has the lowest sensitivity to blue light and the highest sensitivity to green light. Therefore, different color resistance widths can be designed in combination with the power consumption and life of different colors and the sensitivity of the human eye to light. Exemplarily, the sub-pixel unit 30 includes a first color sub-pixel unit, a second color sub-pixel unit and a third color sub-pixel unit, and the color resistance 52 includes a first color resistance, a second color resistance and a third color resistance. The first color sub-pixel unit corresponds to the first color resistance, the second color sub-pixel unit corresponds to the second color resistance, and the third color sub-pixel unit corresponds to the third color resistance. The first color sub-pixel unit emits blue light, the second color sub-pixel unit emits red light, and the third color sub-pixel unit emits green light; the width of the first color resistance is greater than the width of the second color resistance, and the width of the second color resistance is greater than the width of the third color resistance. In this way, the visual color cast problem of the display panel can be further improved, and the purpose of improving the display effect of the display panel is achieved.

[0064] In order to realize the touch function of the display panel, Figure 4 FIG. 2 shows a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the present invention. Figure 4 As shown, the display panel further includes: a touch layer 60 disposed between the encapsulation layer 40 and the color filter layer 50. The touch layer 60 can replace the traditional external TP and be directly disposed between the encapsulation layer 40 and the color filter layer 50, so that no colloid is needed to bond the two together, thereby reducing the overall thickness of the display panel, and at the same time, improving the flexibility and transmittance of the display panel, which is conducive to folding, realizing the under-screen camera and fingerprint recognition technology, and realizing low power consumption of the display panel.

[0065] In the embodiment provided by the present invention, the encapsulation layer 40 may include a first inorganic film layer, an organic film layer and a second inorganic film layer in a direction away from the base substrate 10 . The encapsulation layer 40 serves to isolate water vapor and effectively protect the sub-pixel unit 30 .

[0066] The touch layer 60 includes a plurality of touch electrodes. The present invention does not limit the material of the touch layer 60 . For example, the material of the touch layer 60 may be metal, or a transparent conductive material such as indium tin oxide (ITO).

[0067] In the embodiment of the present invention, the sub-pixel unit is not limited to red sub-pixels, green sub-pixels and blue sub-pixels, but may also be sub-pixels that can emit light of other colors, such as white sub-pixels, yellow sub-pixels, cyan sub-pixels or pink sub-pixels.

[0068] An embodiment of the present invention provides a display panel, comprising: a pixel defining layer arranged on a base substrate, the pixel defining layer comprising a separator and a plurality of openings for accommodating sub-pixel units; an encapsulation layer arranged on the pixel defining layer and the sub-pixel units; a color filter layer arranged on the encapsulation layer, the color filter layer comprising a shading layer arranged corresponding to the separator and a color resist arranged corresponding to the sub-pixel units; wherein the vertical distance between the sub-pixel unit and the base substrate gradually decreases from the edge to the center thereof; and the vertical distance between the color resist and the base substrate gradually decreases from the edge to the center thereof on a side close to the sub-pixel unit. The present invention adopts the structure of a light shielding layer and a color block, so that the color filter layer can replace the polarizer, and designs the structure of the sub-pixel unit and the color block: 1. The vertical distance between the sub-pixel unit and the substrate gradually decreases from the edge to the center, which can not only increase the light emitting area of ​​the sub-pixel unit, but also make the divergent light emitted by the sub-pixel unit converge to the center, reducing the light irradiated on the light shielding layer and reducing the light absorption of the light shielding layer; 2. The vertical distance between the side of the color block close to the sub-pixel unit and the substrate gradually decreases from the edge to the center, which can re-converge the light that has not been converged into the color block, further reducing the light absorption of the light shielding layer, so that more light can be taken out from the color block. At the same time, through the design of the light shielding layer, the reflectivity of the display panel can be reasonably reduced, the observability of the display panel can be increased, and the display effect of the display panel can be improved.

[0069] An embodiment of the present invention further provides a display device, Figure 5 FIG. 1 is a schematic diagram showing the structure of a display device provided by an embodiment of the present invention. Figure 5 As shown, the display device 70 includes a display panel 71 provided by any embodiment of the present invention.

[0070] The display panel 71 may be a flexible organic light-emitting display panel or a non-flexible organic light-emitting display panel. The light-emitting mode of the organic light-emitting display panel may be top-emitting, bottom-emitting or double-sided emitting. The display device 70 may further include a front camera and a sensor. The front camera and the sensor are correspondingly arranged below the display area of ​​the display panel 71. Optionally, in addition to the front camera and the sensor, other devices may be arranged below the display area, such as a gyroscope or an earpiece.

[0071] The display device 70 provided in the embodiment of the present invention can be applied to smart wearable devices (such as smart bracelets and smart watches), and can also be applied to smart phones, tablet computers, monitors and other devices. Those skilled in the art can design and select accordingly according to the actual use scenarios and functional requirements of the display device.

[0072] Figure 6A schematic flow chart of a method for manufacturing a display panel provided by an embodiment of the present invention is shown.

[0073] like Figure 6 As shown, the method for preparing a display panel may include steps S101-S105:

[0074] S101, forming a thin film transistor layer on a base substrate.

[0075] Taking a thin film transistor having a top-gate structure as an example, the thin film transistor layer may include:

[0076] A buffer layer located on the substrate, an active layer located on the buffer layer, a gate insulating layer located on the active layer, a gate located on the gate insulating layer, an interlayer insulating layer located on the gate, a source and a drain located on the interlayer insulating layer; a passivation layer located on the source and the drain; wherein the source and the drain can be located on the same layer and obtained through a single patterning process, and therefore, the source and the drain can also be referred to as source-drain metal layers.

[0077] S102 , forming a pixel defining layer including a separator and a plurality of openings on the thin film transistor layer, and forming sub-pixel units in the openings.

[0078] For step S102, the method of "forming a pixel defining layer including a separator and a plurality of openings on the thin film transistor layer, and forming sub-pixel units in the openings" may specifically include the following three steps:

[0079] Step 1: depositing a layer of metal material on the thin film transistor layer, and forming a pixel defining layer including a separator and a plurality of openings on the metal material.

[0080] Step 2: Perform a patterning process on the metal material exposed in the opening to obtain an anode.

[0081] The anode is electrically connected to the drain of the thin film transistor by penetrating the passivation layer.

[0082] Step 3: forming a light-emitting layer and a cathode on the anode in sequence.

[0083] S103 , forming an encapsulation layer on the pixel defining layer and the sub-pixel unit.

[0084] S104 , forming a touch layer on the packaging layer.

[0085] Regarding step S104, the method of “forming a touch layer on the encapsulation layer” may specifically include the following two steps:

[0086] Step 1: forming a touch control body on the packaging layer.

[0087] Step 2: Perform a patterning process on the touch control body to form a groove corresponding to the sub-pixel unit so that the color resist fills the groove.

[0088] S105 , forming a color filter layer on the touch layer, wherein the color filter layer includes a light shielding layer arranged corresponding to the separator and a color resist arranged corresponding to the sub-pixel unit.

[0089] Among them, the vertical distance between the sub-pixel unit and the substrate gradually decreases from its edge to the center; the vertical distance between the side of the color resistance close to the sub-pixel unit and the substrate gradually decreases from its edge to the center.

[0090] The present invention adopts the structure of a light shielding layer and a color block, so that the color filter layer can replace the polarizer, and designs the structure of the sub-pixel unit and the color block: 1. The vertical distance between the sub-pixel unit and the substrate gradually decreases from the edge to the center, which can not only increase the light emitting area of ​​the sub-pixel unit, but also make the divergent light emitted by the sub-pixel unit converge to the center, reducing the light irradiated on the light shielding layer and reducing the light absorption of the light shielding layer; 2. The vertical distance between the side of the color block close to the sub-pixel unit and the substrate gradually decreases from the edge to the center, which can re-converge the light that has not been converged into the color block, further reducing the light absorption of the light shielding layer, so that more light can be taken out from the color block. At the same time, through the design of the light shielding layer, the reflectivity of the display panel can be reasonably reduced, the observability of the display panel can be increased, and the display effect of the display panel can be improved.

[0091] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that: include: A pixel defining layer is disposed on the base substrate, wherein the pixel defining layer includes a separator and a plurality of openings for accommodating sub-pixel units; An encapsulation layer disposed on the pixel defining layer and the sub-pixel unit; A color filter layer disposed on the encapsulation layer, the color filter layer comprising a light shielding layer disposed corresponding to the separator and a color resist disposed corresponding to the sub-pixel unit; Among them, the vertical distance between the sub-pixel unit and the substrate gradually decreases from its edge to the center; the vertical distance between the color resistance close to the sub-pixel unit and the substrate gradually decreases from its edge to the center; in the direction away from the substrate, the sub-pixel unit includes an anode, a light-emitting layer and a cathode; the anode is spherical, and the distance between the anode and its corresponding color resistance is less than or equal to the spherical radius.

2. The display panel according to claim 1, characterized in that: The vertical distance between the side of the color resist away from the sub-pixel unit and the substrate gradually decreases from the edge to the center; or The vertical distance between the side of the color resist away from the sub-pixel unit and the substrate from the edge to the center is equal; or, The vertical distance between the side of the color resist away from the sub-pixel unit and the substrate gradually increases from the edge to the center.

3. The display panel according to claim 1 or 2, characterized in that: The orthographic projection of the light shielding layer on the base substrate covers the orthographic projection of the separator on the base substrate.

4. The display panel according to claim 3, characterized in that: The orthographic projection of the light shielding layer on the base substrate coincides with the orthographic projection of the separator on the base substrate.

5. The display panel according to claim 1 or 2, characterized in that: The sub-pixel unit includes a first color sub-pixel unit, a second color sub-pixel unit and a third color sub-pixel unit, the color resistance includes a first color resistance, a second color resistance and a third color resistance, the first color sub-pixel unit corresponds to the first color resistance, the second color sub-pixel unit corresponds to the second color resistance, and the third color sub-pixel unit corresponds to the third color resistance; The width of the first color resist is greater than the width of the second color resist, and the width of the second color resist is greater than the width of the third color resist.

6. The display panel according to claim 5, characterized in that: The first color sub-pixel unit emits blue light, the second color sub-pixel unit emits red light, and the third color sub-pixel unit emits green light.

7. The display panel according to claim 1 or 2, characterized in that: Also includes: A touch layer is disposed between the encapsulation layer and the color filter layer.

8. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-7.

9. A method for preparing a display panel, characterized in that: include: forming a thin film transistor layer on a substrate; forming a pixel defining layer including a separator and a plurality of openings on the thin film transistor layer, and forming sub-pixel units in the openings; forming an encapsulation layer on the pixel defining layer and the sub-pixel unit; forming a touch layer on the encapsulation layer; forming a color filter layer on the touch layer, wherein the color filter layer comprises a light shielding layer arranged corresponding to the separator and a color resist arranged corresponding to the sub-pixel unit; Among them, the vertical distance between the sub-pixel unit and the substrate gradually decreases from its edge to the center; the vertical distance between the color resistance close to the sub-pixel unit and the substrate gradually decreases from its edge to the center; in the direction away from the substrate, the sub-pixel unit includes an anode, a light-emitting layer and a cathode; the anode is spherical, and the distance between the anode and its corresponding color resistance is less than or equal to the spherical radius.

10. The method for preparing a display panel according to claim 9, characterized in that: A pixel defining layer including a separator and a plurality of openings is formed on the thin film transistor layer, and sub-pixel units are formed in the openings, comprising: Depositing a layer of metal material on the thin film transistor layer, and forming a pixel defining layer including a separator and a plurality of openings on the metal material; Performing a patterning process on the metal material exposed in the opening to obtain an anode; A light emitting layer and a cathode are sequentially formed on the anode.

11. The method for preparing a display panel according to claim 9, characterized in that: Forming a touch layer on the encapsulation layer, comprising: forming a touch control body on the packaging layer; The touch control body is patterned to form a groove corresponding to the sub-pixel unit, so that the color resist fills the groove.

Images