Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel comprises a driving substrate and a light-emitting unit electrically connected to one side of the driving substrate. The light-emitting unit comprises a light-emitting element and a color conversion structure at least located on the side, away from the driving substrate, of the light-emitting element. The light-emitting element comprises a first surface, the first surface faces the color conversion structure and is embedded with the color conversion structure, and the first surface is provided with at least one concave structure; the color conversion structure comprises a second surface, and the second surface is at least located on the side, away from the light-emitting element, of the color conversion structure and protrudes towards the side away from the light-emitting element. According to the technical scheme, the light emitting efficiency is improved, and the display effect of the display panel is improved.

Description

Technical Field

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

[0002] With the continuous development of science and technology, various display devices have been widely used in people's daily life and work, bringing great convenience to people's lives. As the core component of the display device, the display effect of the display panel directly affects the user's viewing experience.

[0003] In the related art, a color conversion structure is provided on the light-emitting side of a light-emitting unit in a display panel, such as an LED (Light-Emitting Diode) chip, and the color conversion structure performs color conversion on the LED chip to achieve full-color display of the display panel. However, due to the different materials used in the color conversion structure and the LED chip, the light emitted by the LED chip will be totally reflected at the junction of the color conversion structure and the LED chip, resulting in less light entering the color conversion structure, and then being diverged by the color conversion structure, resulting in low light output efficiency at the normal viewing angle of the display panel. Summary of the invention

[0004] In order to solve the above technical problems, the present disclosure provides a display panel and a display device, which improve the light extraction efficiency of the display panel and the display effect of the display panel.

[0005] In a first aspect, the present disclosure provides a display panel, comprising a driving substrate and a light emitting unit electrically connected to one side of the driving substrate;

[0006] The light-emitting unit includes a light-emitting element and a color conversion structure at least located on a side of the light-emitting element away from the driving substrate;

[0007] The light emitting element comprises a first surface, the first surface faces the color conversion structure and is embedded with the color conversion structure, and the first surface is provided with at least one concave structure;

[0008] The color conversion structure includes a second surface, wherein the second surface is at least located on a side of the color conversion structure away from the light emitting element and protrudes toward a side away from the light emitting element.

[0009] In a second aspect, the present disclosure further provides a display device, comprising a display panel as described in any one of the first aspects.

[0010] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0011] The display panel and display device provided by the present disclosure include a driving substrate and a light-emitting unit electrically connected to one side of the driving substrate; the light-emitting unit includes a light-emitting element and a color conversion structure at least located on the side of the light-emitting element away from the driving substrate; the light-emitting element includes a first surface, the first surface faces the color conversion structure, and is embedded with the color conversion structure, and the first surface is provided with at least one concave structure; the color conversion structure includes a second surface, the second surface is at least located on the side of the color conversion structure away from the light-emitting element, and is protruding toward the side away from the light-emitting element. Thus, the surface area of ​​the first surface is increased by using the concave structure provided on the first surface, and the contact area between the light-emitting element and the color conversion structure is also increased, thereby playing a role in diverging light, so that more light can be emitted from the first surface into the color conversion structure. The second surface protruding on the color conversion structure can converge the light, so as to converge the light emitted by the light-emitting element as much as possible to be emitted at the normal light-emitting angle, thereby improving the light-emitting efficiency and improving the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0014] Figure 1 A schematic diagram of a cross-sectional structure of a display panel provided in an embodiment of the present disclosure;

[0015] Figure 2 for Figure 1 A schematic diagram of light rays of the display panel shown;

[0016] Figure 3 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure;

[0017] Figure 4 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure;

[0018] Figure 5 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure;

[0019] Figure 6 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure;

[0020] Figure 7A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure;

[0021] Figure 8 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure;

[0022] Fig. 9 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure;

[0023] Fig.10 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure;

[0024] Fig.11 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure;

[0025] Fig.12 A schematic diagram of the structure of a display device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0028] In the related art, a color conversion structure is provided on the light-emitting side of a light-emitting unit in a display panel, such as an LED chip, and the color conversion structure performs color conversion on the LED chip to achieve full-color display of the display panel. However, due to the different materials used in the color conversion structure and the LED chip, the light emitted by the LED chip will be totally reflected at the junction of the color conversion structure and the LED chip, resulting in less light entering the color conversion structure, and then being diverged by the color conversion structure, resulting in low light output efficiency at the front viewing angle of the display panel.

[0029] In order to solve the above problems, the embodiment of the present disclosure provides a display panel, which includes: a driving substrate and a light-emitting unit electrically connected to one side of the driving substrate; the light-emitting unit includes a light-emitting element and a color conversion structure at least located on the side of the light-emitting element away from the driving substrate; the light-emitting element includes a first surface, the first surface faces the color conversion structure, and is embedded with the color conversion structure, and the first surface is provided with at least one concave structure; the color conversion structure includes a second surface, the second surface is at least located on the side of the color conversion structure away from the light-emitting element, and is protruding toward the side away from the light-emitting element. Thus, the surface area of ​​the first surface is increased by using the concave structure provided on the first surface, and the contact area between the light-emitting element and the color conversion structure is also increased, thereby playing a role in diverging light, so that more light can be emitted from the first surface into the color conversion structure. The second surface protruding on the color conversion structure can converge the light, so that the light emitted by the light-emitting element is concentrated as much as possible at the straight-view light output angle, thereby improving the light output efficiency and improving the display effect of the display panel.

[0030] Figure 1 A schematic cross-sectional structure diagram of a display panel provided in an embodiment of the present disclosure is shown in FIG. Figure 2 for Figure 1 Schematic diagram of light rays of the display panel shown. Figure 1 and Figure 2 The driving substrate 1 may have a circuit structure therein for transmitting an electrical signal for the light emitting unit 2 to the light emitting unit 2 to drive the light emitting unit 2 to emit light. The light emitting unit 2 may have a cathode and an anode, and the cathode and the anode of the light emitting unit 2 are respectively electrically connected to the driving substrate 1 to form an electrical signal loop between the light emitting unit 2 and the driving substrate 1, so as to emit light based on the electrical signal transmitted by the driving substrate 1.

[0031] The light-emitting unit 2 includes a light-emitting element 3. For example, a packaging layer 101 is provided on the side of the driving substrate 1 facing the light-emitting element 3. The light-emitting element 3 sequentially provides a first semiconductor layer 301, a light-generating layer 302, and a second semiconductor layer 303 in a direction perpendicular to the driving substrate 1. The first semiconductor layer 301 is located between the light-generating layer 302 and the driving substrate 1, and the second semiconductor layer 303 is located between the light-generating layer 302 and the color conversion structure 4. The light-emitting element 3 also includes a first electrode 304 and a second electrode 305. The first electrode 304 is located on the side of the first semiconductor layer 301 facing the driving substrate 1 and is bonded to the first pad 11 on the driving substrate 1. The second electrode 305 is located on the side of the second semiconductor layer 303 facing the driving substrate 1 and is bonded to the second pad 12 of the driving substrate 1. In the direction perpendicular to the driving substrate 1, the light-emitting area is the area where the light-generating layer 302 is located, and the non-light-emitting area is the area of ​​the light-emitting element 3 except the area where the light-generating layer 302 is located. The light generating layer 302 includes a light emitting material. For example, the light generating layer 302 may be a quantum well layer, but is not limited thereto.

[0032] The light-emitting unit 2 also includes a color conversion structure 4 located on the side of the light-emitting element 3 away from the driving substrate 1. The color conversion structure 4 is used to convert the light of the light-emitting element 3 into a preset color for emission, so as to realize full-color display of the display panel. In order to improve the light emission efficiency of the display panel, the first surface S1 of the light-emitting element 3 facing the color conversion structure 4 includes at least one concave structure 5. The first surface S1 and the color conversion structure 4 are embedded in each other. The concave structure 5 can increase the surface area of ​​the first surface S1 of the light-emitting element 3, and the contact area between the light-emitting element 3 and the color conversion structure 4 is also increased, thereby playing a role in diverging light, so that more light can be emitted from the first surface S1 into the color conversion structure 4. The second surface S2 of the color conversion structure 4 is arranged on the side of the color conversion structure 4 away from the light-emitting element 3, and bulges toward the side away from the light-emitting element 3. Figure 2 The arrows in the figure represent the direction of the light. Figure 2 It can be seen that the raised second surface S2 can converge the light, so as to converge the light emitted by the light emitting element 3 as much as possible at the normal light emitting angle, thereby improving the light emitting efficiency and the display effect of the display panel.

[0033] It should be noted that the light emitting element 3 may be, for example, an LED chip, specifically a Micro LED chip, a MiniLED chip or other types of LED chips, etc., or may be other types of light emitting elements 3, which are not limited in the embodiments of the present disclosure. The concave structure 5 may be prepared, for example, by a sapphire substrate template method, a photolithography and dry etching combined process, etc., which are not limited in the embodiments of the present disclosure.

[0034] Optionally, combined Figure 1 and Figure 2 , the refractive index of the light emitting element 3 is greater than the refractive index of the color conversion structure 4 .

[0035] Specifically, refer to Figure 2It can be seen from the refraction angle of the light that, since the refractive index of the light-emitting element 3 in the embodiment of the present disclosure is greater than the refractive index of the color conversion structure 4, it can be known from optical knowledge that when the light is emitted from a medium with a large refractive index to a medium with a small refractive index and the incident angle is greater than or equal to the critical angle, total reflection will occur. When the light emitted from the first surface S1 of the light-emitting element 3 enters the color conversion structure 4, the light emitted from the first surface S1 of the light-emitting element 3 with an angle greater than or equal to the critical angle will be totally reflected at the junction of the color conversion structure 4 and the light-emitting element 3, resulting in insufficient light entering the color conversion structure 4. Therefore, in the embodiment of the present disclosure, at least one concave structure 5 is provided on the first surface S1. The concave structure 5 can increase the surface area of ​​the first surface S1 of the light-emitting element 3, and the contact area between the light-emitting element 3 and the color conversion structure 4 is also increased accordingly, so that more light can be emitted from the first surface S1 and enter the color conversion structure 4, thereby playing a role in diverging the light. After the color is converted by the color conversion structure 4, it is converged by the raised second surface S2 on the color conversion structure 4, so that more light is emitted from the front viewing angle of the display panel, thereby improving the light extraction efficiency and improving the display effect of the display panel.

[0036] For example, the refractive index of the light emitting element 3 made of gallium nitride is 2.4, and the refractive index of the color conversion structure 4, such as a quantum dot filling layer, is 1.5. It should be noted that other types of light emitting elements 3 and color conversion structures 4 may also be used, and the embodiments of the present disclosure are not limited thereto.

[0037] Figure 3 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure, Figure 4 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure, Figure 5 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure. Figures 1 to 5 The display panel includes light-emitting units 2 with different light-emitting colors; in at least two light-emitting units 2 with different light-emitting colors, the depths of the concave structures 5 of the light-emitting elements 3 are different, and / or the number of the concave structures 5 of the light-emitting elements 3 is different; wherein the depth of the concave structure 5 is the depth of the concave structure 5 in a first direction, and the first direction is perpendicular to the plane where the driving substrate 1 is located.

[0038] For example, Figures 1 to 5Different color conversion structures 4 are distinguished by different filling patterns, and different light-emitting units 2 use different color conversion structures 4 to achieve different luminous colors. The subsequent figures can also be understood in this way. Since the color conversion structures 4 in the light-emitting units 2 of different colors are different, for example, when red quantum dots, green quantum dots and blue quantum dots are used as color conversion structures 4, due to different materials, size effects, and surface states, the red quantum dots, green quantum dots and blue quantum dots have different conversion rates for the light emitted by the light-emitting element 3, resulting in different light outputs of the light-emitting units 2 of different colors. In order to ensure that the light outputs of the light-emitting units 2 of different colors are as similar as possible, the concave structure 5 of the light-emitting element 3 can be designed differently.

[0039] Due to the different depths and numbers of the concave structures 5 of the light-emitting element 3, the surface area of ​​the first surface S1 will change. The surface areas of the first surface S1 are different, and the contact areas between the first surface S1 and the color conversion structure 4 are also different. The amount of light that can be emitted from the first surface S1 and enter the color conversion structure 4 is different, and the amount of light emitted from the color conversion structure 4 at a normal viewing angle is also different, thereby balancing the light output of the light-emitting units 2 of different luminous colors at a normal viewing angle, and avoiding the problem of color cast on the display panel.

[0040] Figure 1 and Figure 2 The concave structure 5 is exemplarily shown as a concave arc shape. Figure 3 and Figure 5 The concave structure 5 is exemplarily shown as a concave square. Figure 4 and Figure 5 The concave structure 5 is exemplarily shown as a concave triangle. Figures 1 to 4 FIG. 4 exemplarily shows that the depths of the concave structures 5 of the light-emitting units 2 with different light-emitting colors are different. Figure 5 2 shows that the number of the concave structures 5 of the light emitting units 2 with different luminous colors is different. In some embodiments, the concave structures 5 may also include a combination of concave arcs, concave squares and concave triangles, which are not limited here.

[0041] It should be noted that only the depth of the concave structure 5 of the light-emitting element 3 may be set to be different, or only the number of the concave structures 5 of the light-emitting element 3 may be set to be different, or both the depth of the concave structure 5 of the light-emitting element 3 and the number of the concave structures 5 of the light-emitting element 3 may be set to be different, and the embodiments of the present disclosure are not limited to this.

[0042] Optionally, combined Figure 1 , Figures 3 to 5The light-emitting unit 2 includes a first light-emitting unit 21 and a second light-emitting unit 22. The first light-emitting unit 21 includes a first light-emitting element 31 and a first color conversion structure 41. The second light-emitting unit 22 includes a second light-emitting element 32 and a second color conversion structure 42. The light-emitting colors of the first light-emitting element 31 and the second light-emitting element 32 are the same. The light emitted by the first light-emitting element 31 emits a first color light after passing through the first color conversion structure 41, and the second light-emitting element 32 emits a second color light after passing through the second color conversion structure 42. The conversion rate of the first color conversion structure 41 to the light effect is greater than the conversion rate of the second color conversion structure 42 to the light effect. The first light-emitting element 31 includes a first concave structure 51, and the second light-emitting element 32 includes a second concave structure 52. The depth of the first concave structure 51 is less than the depth of the second concave structure 52, and / or the number of the first concave structures 51 is less than the number of the second concave structures 52.

[0043] Specifically, combined Figure 1 , Figures 3 to 5 Since the first light-emitting element 31 and the second light-emitting element 32 emit the same color, when the amount of light emitted by the first light-emitting element 31 to the first color conversion structure 41 and the amount of light emitted by the second light-emitting element 32 to the second color conversion structure 42 are the same, since the conversion rate of the first color conversion structure 41 to the light effect is greater than the conversion rate of the second color conversion structure 42 to the light effect, the amount of the first color light emitted after conversion by the first color conversion structure 41 is greater than the amount of the second color light emitted after conversion by the second color conversion structure 42, resulting in a color shift problem on the display panel.

[0044] In order to solve this problem, the embodiment of the present disclosure makes a differentiated design for the first concave structure 51 of the first light emitting element 31 and the second concave structure 52 of the second light emitting element 32. Figure 1 , Figure 3 and Figure 4 In order to balance the amount of light of the first color light and the amount of light of the second color light, the depth h1 of the first concave structure 51 can be set to be smaller than the depth h2 of the second concave structure 52, so that the surface area of ​​the first concave structure 51 is smaller than the surface area of ​​the second concave structure 52, and the amount of light emitted through the first concave structure 51 and entering the first color conversion structure 41 is also smaller than the amount of light emitted through the second concave structure 52 and entering the second color conversion structure 42, and the conversion rate of the first color conversion structure 41 to the light effect is greater than the conversion rate of the second color conversion structure 42 to the light effect, thereby achieving the effect of balancing the amount of light of the first color light and the amount of light of the second color light, and avoiding color deviation of the display panel.

[0045] Reference Figure 5The number of the first concave structures 51 may also be set to be smaller than the number of the second concave structures 52, so that the surface area of ​​the first concave structure 51 is smaller than the surface area of ​​the second concave structure 52, and the amount of light emitted through the first concave structure 51 and entering the first color conversion structure 41 is also smaller than the amount of light emitted through the second concave structure 52 and entering the second color conversion structure 42, while the conversion rate of the first color conversion structure 41 to the light effect is greater than the conversion rate of the second color conversion structure 42 to the light effect, thereby achieving a balance between the light output of the first color light and the second color light at a normal viewing angle, thereby avoiding color deviation of the display panel.

[0046] For example, the first light emitting element 31 and the second light emitting element 32 may be set as ultraviolet LED chips, the first color conversion structure 41 may include red quantum dots, the second color conversion structure 42 may include green quantum dots, and the conversion rate of red quantum dots to light effect is greater than the conversion rate of green quantum dots to light effect. Figure 1 , Figure 3 and Figure 4 , the depth h1 of the first concave structure 51 is set to be smaller than the depth h2 of the second concave structure 52, and / or, reference may be made to Figure 5 The number of the first concave structures 51 is set to be smaller than the number of the second concave structures 52, so that the amount of light emitted through the first concave structures 51 and entering the first color conversion structure 41 is smaller than the amount of light emitted through the second concave structures 52 and entering the first color conversion structure 41, thereby balancing the light emission of red light and green light at a normal viewing angle and avoiding color deviation of the display panel.

[0047] For example, the first light emitting element 31 and the second light emitting element 32 may be set as ultraviolet LED chips, the first color conversion structure 41 may include green quantum dots, the second color conversion structure 42 may include blue quantum dots, the conversion rate of green quantum dots to light effect is greater than the conversion rate of blue quantum dots to light effect, and the conversion rate of green quantum dots to light effect may be calculated according to Figure 1 , Figure 3 and Figure 4 , the depth h1 of the first concave structure 51 is set to be smaller than the depth h2 of the second concave structure 52, and / or, reference may be made to Figure 5 The number of the first concave structures 51 is set to be smaller than the number of the second concave structures 52, so that the amount of light emitted through the first concave structures 51 and entering the first color conversion structure 41 is smaller than the amount of light emitted through the second concave structures 52 and entering the first color conversion structure 41, thereby balancing the light emission amounts of green light and blue light at a normal viewing angle and avoiding color deviation of the display panel.

[0048] For example, the first light emitting element 31 and the second light emitting element 32 may be set as ultraviolet LED chips, the first color conversion structure 41 may include red quantum dots, the second color conversion structure 42 may include blue quantum dots, the conversion rate of the red quantum dots to the light effect is greater than the conversion rate of the blue quantum dots to the light effect, and the conversion rate of the red quantum dots to the light effect may be calculated according to Figure 1 , Figure 3 and Figure 4 , the depth h1 of the first concave structure 51 is set to be smaller than the depth h2 of the second concave structure 52, and / or, reference may be made to Figure 5 The number of the first concave structures 51 is set to be smaller than the number of the second concave structures 52, so that the amount of light emitted through the first concave structures 51 and entering the first color conversion structure 41 is smaller than the amount of light emitted through the second concave structures 52 and entering the first color conversion structure 41, thereby balancing the light output of red light and blue light at a normal viewing angle and avoiding color deviation of the display panel.

[0049] Figure 6 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure, Figure 7 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure, combined with Figure 6 and Figure 7 , the display panel may include, for example, a first light-emitting element 31, a second light-emitting element 32 and a third light-emitting element 33, and the first light-emitting element 31, the second light-emitting element 32 and the third light-emitting element 33 are, for example, ultraviolet LED chips. The first color conversion structure 41 may include red quantum dots, the second color conversion structure 42 may include green quantum dots, and the third color conversion structure 43 may include blue quantum dots. The light emitted by the ultraviolet LED chip is converted into red light after being converted by the red quantum dots, the light emitted by the ultraviolet LED chip is converted into green light after being converted by the green quantum dots, and the light emitted by the ultraviolet LED chip is converted into blue light after being converted by the blue quantum dots. The conversion rate of red quantum dots to light effect is greater than that of green quantum dots, and the conversion rate of green quantum dots to light effect is greater than that of blue quantum dots, so it can be referred to Figure 6 The depth h1 of the first concave structure 51 is set to be smaller than the depth h2 of the second concave structure 52, and the depth h2 of the second concave structure 52 is smaller than the depth h3 of the third concave structure 53. Figure 7 The number of the first concave structures 51 is set to be smaller than the number of the second concave structures 52, and the number of the second concave structures 52 is set to be smaller than the number of the third concave structures 53, so that the amount of light emitted through the first concave structures 51 and entering the first color conversion structure 41 is smaller than the amount of light emitted through the second concave structures 52 and entering the second color conversion structure 42, and the amount of light emitted through the second concave structures 52 and entering the second color conversion structure 42 is smaller than the amount of light emitted through the third concave structures 53 and entering the third color conversion structure 43, thereby balancing the light output of red light, green light and blue light at a normal viewing angle and avoiding color deviation of the display panel.

[0050] Continue to refer to Figure 1 , Figures 3 to 5For example, the first light emitting element 31 and the second light emitting element 32 may be blue LED chips, the first color conversion structure 41 may include red quantum dots, the second color conversion structure 42 may include green quantum dots, the conversion rate of red quantum dots to light effect is greater than the conversion rate of green quantum dots to light effect, and the conversion rate of red quantum dots to light effect may be calculated according to Figure 1 , Figure 3 and Figure 4 , the depth h1 of the first concave structure 51 is set to be smaller than the depth h2 of the second concave structure 52, and / or, Figure 5 The number of the first concave structures 51 is set to be smaller than the number of the second concave structures 52, so that the amount of light emitted through the first concave structures 51 and entering the first color conversion structure 41 is smaller than the amount of light emitted through the second concave structures 52 and entering the second color conversion structure 42, thereby balancing the light output of red light and green light at a normal viewing angle and avoiding color deviation of the display panel.

[0051] For example, the first light emitting element 31 and the second light emitting element 32 can be set as blue light LED chips, and the light emitted by the first light emitting element 31 and the second light emitting element 32 is blue light. The first color conversion structure 41 is set as a transparent material, and the second color conversion structure 42 includes a red quantum dot material. Since the blue light does not require a laser conversion process, the conversion rate of the transparent material to the light effect is greater than the conversion rate of the red quantum dot to the light effect. Figure 1 , Figure 3 and Figure 4 , the depth h1 of the first concave structure 51 is set to be smaller than the depth h2 of the second concave structure 52, and / or, reference may be made to Figure 5 The number of the first concave structures 51 is set to be smaller than the number of the second concave structures 52, so that the amount of light emitted through the first concave structures 51 and entering the first color conversion structure 41 is smaller than the amount of light emitted through the second concave structures 52 and entering the second color conversion structure 42, thereby balancing the light output of blue light and red light at a normal viewing angle and avoiding color deviation of the display panel.

[0052] For example, the first light emitting element 31 and the second light emitting element 32 may be configured as blue LED chips, and the light emitted by the first light emitting element 31 and the second light emitting element 32 is blue light. The first color conversion structure 41 may include a transparent material, and the second color conversion structure 42 may include a green quantum dot material. Since the blue light does not require a laser conversion process, the conversion rate of the transparent material to the light effect is greater than the conversion rate of the green quantum dot to the light effect. Figure 1 , Figure 3 and Figure 4 The depth h1 of the first concave structure 51 is set to be smaller than the depth h2 of the second concave structure 52, and / or, referring to Figure 5The number of the first concave structures 51 is set to be smaller than the number of the second concave structures 52, so that the amount of light emitted through the first concave structures 51 and entering the first color conversion structure 41 is smaller than the amount of light emitted through the second concave structures 52 and entering the second color conversion structure 42, thereby balancing the light output of blue light and red light at a normal viewing angle and avoiding color deviation of the display panel.

[0053] Continue to refer to Figure 6 and Figure 7 The display panel includes, for example, a first light-emitting element 31, a second light-emitting element 32, and a third light-emitting element 33. The first light-emitting element 31, the second light-emitting element 32, and the third light-emitting element 33 are, for example, blue LED chips. The first color conversion structure 41 may include a transparent material, the second color conversion structure 42 may include red quantum dots, and the third color conversion structure 43 may include green quantum dots. The light emitted by the blue LED chip is converted into red light after being converted by the red quantum dots, and the light emitted by the blue LED chip is converted into green light after being converted by the green quantum dots. The light emitted by the blue LED chip is emitted into blue light after passing through the transparent material. The conversion rate of the transparent material to the light effect is greater than the conversion rate of the red quantum dots to the light effect, and the conversion rate of the red quantum dots to the light effect is greater than the conversion rate of the green quantum dots to the light effect. Therefore, reference can be made to Figure 6 The depth h1 of the first concave structure 51 is set to be smaller than the depth h2 of the second concave structure 52, and the depth h2 of the second concave structure 52 is set to be smaller than the depth h3 of the third concave structure 53; and / or, reference may be made to Figure 7 The number of the first concave structures 51 is set to be smaller than the number of the second concave structures 52, and the number of the second concave structures 52 is set to be smaller than the number of the third concave structures 53, so that the amount of light emitted through the first concave structures 51 and entering the first color conversion structure 41 is smaller than the amount of light emitted through the second concave structures 52 and entering the second color conversion structure 42, and the amount of light emitted through the second concave structures 52 and entering the second color conversion structure 42 is smaller than the amount of light emitted through the third concave structures 53 and entering the third color conversion structure 43, thereby balancing the light output of red light, green light and blue light at a normal viewing angle and avoiding color deviation of the display panel.

[0054] Alternatively, if Figure 1As shown, the light-emitting unit 2 includes a first light-emitting unit 21 and a second light-emitting unit 22. The first light-emitting unit 21 includes a first light-emitting element 31 and a first color conversion structure 41. The second light-emitting unit 22 includes a second light-emitting element 32 and a second color conversion structure 42. The light-emitting colors of the first light-emitting element 31 and the second light-emitting element 32 are the same. The light emitted by the first light-emitting element 31 emits a first color light after passing through the first color conversion structure 41, and the second light-emitting element 32 emits a second color light after passing through the second color conversion structure 42. The conversion rate of the light effect by the first color conversion structure 41 is greater than the conversion rate of the light effect by the second color conversion structure 42. The concave structure 5 is a concave arc. The first light-emitting element 31 includes a first concave structure 51, and the second light-emitting element 32 includes a second concave structure 52. The arc curvature of the first concave structure 51 is less than the arc curvature of the second concave structure 52.

[0055] Specifically, since the first light-emitting element 31 and the second light-emitting element 32 emit the same color, when the amount of light emitted by the first light-emitting element 31 to the first color conversion structure 41 and the amount of light emitted by the second light-emitting element 32 to the second color conversion structure 42 are the same, since the conversion rate of the first color conversion structure 41 to the light effect is greater than the conversion rate of the second color conversion structure 42 to the light effect, the amount of the first color light emitted after conversion by the first color conversion structure 41 is greater than the amount of the second color light emitted after conversion by the second color conversion structure 42, resulting in a color shift problem on the display panel.

[0056] In order to solve this problem, the embodiment of the present disclosure makes a differentiated design for the first concave structure 51 of the first light emitting element 31 and the second concave structure 52 of the second light emitting element 32. For example, Figure 1 As shown, in order to balance the amount of light of the first color light and the amount of light of the second color light, since the concave structure 5 is a concave arc, the smaller the curvature of the concave arc, the smaller the surface area of ​​the concave structure 5, the arc curvature of the first concave structure 51 can be set to be smaller than the arc curvature of the second concave structure 52, so that the surface area of ​​the first concave structure 51 is smaller than the surface area of ​​the second concave structure 52, and the amount of light emitted through the first concave structure 51 and entering the first color conversion structure 41 is also smaller than the amount of light emitted through the second concave structure 52 and entering the second color conversion structure 42, and the conversion rate of the first color conversion structure 41 to the light effect is greater than the conversion rate of the second color conversion structure 42 to the light effect, thereby achieving a balance in the light emission of the first color light and the second color light at a normal viewing angle, thereby avoiding color deviation of the display panel.

[0057] Figure 8 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure. Figure 8 As shown, the inner concave structure 5 also includes a concave-convex microstructure 6.

[0058] Specifically, Figure 8 As shown, the concave structure 5 may further include a concave-convex microstructure 6, so that the first surface S1 is a rough surface, which further increases the surface area of ​​the first surface S1 of the light-emitting element 3, and the contact area between the light-emitting element 3 and the color conversion structure 4 is also increased, so that more light can be emitted from the first surface S1 and enter the color conversion structure 4, thereby playing a role in diverging light. After the color conversion by the color conversion structure 4, the light is converged by the raised second surface S2 on the color conversion structure 4, so that more light is emitted from the front view angle of the display panel, thereby improving the light extraction efficiency and the display effect of the display panel.

[0059] It should be noted that Figure 8 It is exemplarily shown that the concave-convex microstructure 6 is a sawtooth structure, but it is not limited to this. In other embodiments, the concave-convex microstructure 6 may include at least one of a sawtooth structure, a triangular pyramid, a sphere, a square column and a polyhedral column, and the embodiments of the present disclosure are not limited to this.

[0060] Alternatively, if Figure 8 As shown, the display panel includes light-emitting units 2 with different light-emitting colors; in at least two light-emitting units 2 with different light-emitting colors, the structural densities of the concavo-convex microstructure 6 are different.

[0061] For example, Figure 8 The color conversion structure 4 is distinguished by different filling patterns to distinguish the light-emitting units 2 of different luminous colors. Since the color conversion structures 4 in the light-emitting units 2 of different colors are different, for example, when red quantum dots, green quantum dots and blue quantum dots are used as the color conversion structure 4, due to different materials, size effects and surface states, the red quantum dots, green quantum dots and blue quantum dots have different conversion rates for the light emitted by the light-emitting element 3, resulting in different light output amounts of the light-emitting units 2 of different colors. In order to ensure that the light output amounts of the light-emitting units 2 of different colors are as similar as possible, the concave-convex microstructure 6 of the light-emitting element 3 can be designed differently.

[0062] Specifically, since the structural density of the concave-convex microstructure 6 of the light-emitting units 2 of different luminous colors is different, the surface area of ​​the first surface S1 of the light-emitting units 2 of different luminous colors will be different, and the contact area between the first surface S1 and the color conversion structure 4 will also be different. The amount of light that can be emitted from the first surface S1 and enter the color conversion structure 4 will also be different, thereby balancing the light output of the light-emitting units 2 of different luminous colors at the normal viewing angle as much as possible to avoid the problem of color cast on the display panel.

[0063] Fig. 9 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure, Fig.10 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure. Figures 8 to 10, the light-emitting unit 2 includes a first light-emitting unit 21 and a second light-emitting unit 22, the first light-emitting unit 21 includes a first light-emitting element 31 and a first color conversion structure 41, the second light-emitting unit 22 includes a second light-emitting element 32 and a second color conversion structure 42, the light-emitting colors of the first light-emitting element 31 and the second light-emitting element 32 are the same; the light emitted by the first light-emitting element 31 emits a first color light after passing through the first color conversion structure 41, and the second light-emitting element 32 emits a second color light after passing through the second color conversion structure 42, and the conversion rate of the first color conversion structure 41 to the light effect is greater than the conversion rate of the second color conversion structure 42 to the light effect; the first light-emitting element 31 includes a first concave-convex microstructure 61, the second light-emitting element 32 includes a second concave-convex microstructure 62, and the structural density of the first concave-convex microstructure 61 is less than the structural density of the second concave-convex microstructure 62. Wherein, Figures 8 to 10 The shapes of the concave structures 5 are different.

[0064] Since the first light-emitting element 31 and the second light-emitting element 32 emit the same color, when the amount of light emitted by the first light-emitting element 31 to the first color conversion structure 41 and the amount of light emitted by the second light-emitting element 32 to the second color conversion structure 42 are the same, since the conversion rate of the first color conversion structure 41 to the light effect is greater than the conversion rate of the second color conversion structure 42 to the light effect, the amount of the first color light emitted after conversion by the first color conversion structure 41 is greater than the amount of the second color light emitted after conversion by the second color conversion structure 42, resulting in a color shift problem on the display panel.

[0065] In order to solve this problem, the embodiment of the present disclosure makes a differentiated design for the first concave-convex microstructure 61 of the first light-emitting element 31 and the second concave-convex microstructure 62 of the second light-emitting element 32. Exemplarily, in order to balance the light amount of the first color light and the light amount of the second color light, the structural density of the first concave-convex microstructure 61 can be set to be smaller than the structural density of the second concave-convex microstructure 62, so that the surface area of ​​the structural density of the first concave-convex microstructure 61 is smaller than the surface area of ​​the structural density of the second concave-convex microstructure 62, and the amount of light emitted through the first concave-convex microstructure 61 and entering the first color conversion structure 41 is also smaller than the amount of light emitted through the second concave-convex microstructure 62 and entering the second color conversion structure 42, and the conversion rate of the first color conversion structure 41 to the light effect is greater than the conversion rate of the second color conversion structure 42 to the light effect, thereby achieving the effect of balancing the light amount of the first color light and the light amount of the second color light, and avoiding the color deviation of the display panel.

[0066] For example, refer to Figures 8 to 10The first light-emitting element 31 and the second light-emitting element 32 can be set as ultraviolet LED chips, the first color conversion structure 41 may include red quantum dots, and the second color conversion structure 42 may include green quantum dots. The conversion rate of red quantum dots to light efficiency is greater than the conversion rate of green quantum dots to light efficiency. The structural density of the first concave-convex microstructure 61 is set to be smaller than the structural density of the second concave-convex microstructure 62, so that the amount of light emitted through the first concave-convex microstructure 61 and entering the first color conversion structure 41 is less than the amount of light emitted through the second concave-convex microstructure 62 and entering the second color conversion structure 42, thereby balancing the light output of red light and green light at a normal viewing angle and avoiding color deviation of the display panel.

[0067] Exemplarily, the first light-emitting element 31 and the second light-emitting element 32 can be set as ultraviolet LED chips, the first color conversion structure 41 may include green quantum dots, and the second color conversion structure 42 may include blue quantum dots. The conversion rate of green quantum dots to light efficiency is greater than that of blue quantum dots to light efficiency. The structural density of the first concave-convex microstructure 61 is set to be smaller than the structural density of the second concave-convex microstructure 62, so that the amount of light emitted through the first concave-convex microstructure 61 and entering the first color conversion structure 41 is smaller than the amount of light emitted through the second concave-convex microstructure 62 and entering the second color conversion structure 42, thereby balancing the light output of green light and blue light at a normal viewing angle and avoiding color deviation of the display panel.

[0068] Exemplarily, the first light-emitting element 31 and the second light-emitting element 32 can be set as ultraviolet LED chips, the first color conversion structure 41 may include red quantum dots, and the second color conversion structure 42 may include blue quantum dots. The conversion rate of red quantum dots to light efficiency is greater than that of blue quantum dots to light efficiency. The structural density of the first concave-convex microstructure 61 is set to be smaller than the structural density of the second concave-convex microstructure 62, so that the amount of light emitted through the first concave-convex microstructure 61 and entering the first color conversion structure 41 is smaller than the amount of light emitted through the second concave-convex microstructure 62 and entering the second color conversion structure 42, thereby balancing the light output of red light and blue light at a normal viewing angle and avoiding color deviation of the display panel.

[0069] Fig.11 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present disclosure is shown in FIG. Figure 3As shown, the display panel may include, for example, a first light emitting element 31, a second light emitting element 32, and a third light emitting element 33, wherein the first light emitting element 31, the second light emitting element 32, and the third light emitting element 33 are, for example, ultraviolet LED chips. The first color conversion structure 41 may include red quantum dots, the second color conversion structure 42 may include green quantum dots, and the third color conversion structure 43 may include blue quantum dots. The light emitted by the ultraviolet LED chip is converted into red light after being converted by the red quantum dots, the light emitted by the ultraviolet LED chip is converted into green light after being converted by the green quantum dots, and the light emitted by the ultraviolet LED chip is converted into blue light after being converted by the blue quantum dots. The conversion rate of red quantum dots to light effect is greater than that of green quantum dots, and the conversion rate of green quantum dots to light effect is greater than that of blue quantum dots. Therefore, the structural density of the first concave-convex microstructure 61 is set to be smaller than the structural density of the second concave-convex microstructure 62, and the structural density of the second concave-convex microstructure 62 is smaller than the structural density of the third concave-convex microstructure 63, so that the amount of light emitted through the first concave-convex microstructure 61 and entering the first color conversion structure 41 is smaller than the amount of light emitted through the second concave-convex microstructure 62 and entering the second color conversion structure 42, and the amount of light emitted through the second concave-convex microstructure 62 and entering the second color conversion structure 42 is smaller than the amount of light emitted through the third concave-convex microstructure 63 and entering the third color conversion structure 43, thereby balancing the light output of red light, green light and blue light at a normal viewing angle and avoiding color deviation of the display panel.

[0070] Exemplarily, the light-emitting elements 3 of the first light-emitting unit 21 and the second light-emitting unit 22 can be set as blue light LED chips, the first color conversion structure 41 may include red quantum dots, and the second color conversion structure 42 may include green quantum dots. The conversion rate of red quantum dots to light efficiency is greater than the conversion rate of green quantum dots to light efficiency. The structural density of the first concave-convex microstructure 61 is set to be smaller than the structural density of the second concave-convex microstructure 62, so that the amount of light emitted through the first concave-convex microstructure 61 and entering the first color conversion structure 41 is smaller than the amount of light emitted through the second concave-convex microstructure 62 and entering the second color conversion structure 42, thereby balancing the light output of red light and green light at a normal viewing angle and avoiding color deviation of the display panel.

[0071] Exemplarily, the first light-emitting element 31 and the second light-emitting element 32 can be set as blue light LED chips, and the light emitted by the first light-emitting element 31 and the second light-emitting element 32 is blue light. The first color conversion structure 41 can be set to include a transparent material, and the second color conversion structure 42 can be set to include a red quantum dot material. Since blue light does not require a laser conversion process, the conversion rate of the transparent material to the light effect is greater than the conversion rate of the red quantum dots to the light effect. The structural density of the first concave-convex microstructure 61 is set to be smaller than the structural density of the second concave-convex microstructure 62, so that the amount of light emitted through the first concave-convex microstructure 61 and entering the first color conversion structure 41 is smaller than the amount of light emitted through the second concave-convex microstructure 62 and entering the second color conversion structure 42, thereby balancing the light output of blue light and red light at a normal viewing angle and avoiding color deviation of the display panel.

[0072] Exemplarily, the first light-emitting element 31 and the second light-emitting element 32 can be set as blue light LED chips, and the light emitted by the first light-emitting element 31 and the second light-emitting element 32 is blue light. The first color conversion structure 41 can be set to include a transparent material, and the second color conversion structure 42 can be set to include a green quantum dot material. Since blue light does not require a laser conversion process, the conversion rate of the transparent material to the light effect is greater than the conversion rate of the green quantum dots to the light effect. The structural density of the first concave-convex microstructure 61 is set to be smaller than the structural density of the second concave-convex microstructure 62, so that the amount of light emitted through the first concave-convex microstructure 61 and entering the first color conversion structure 41 is smaller than the amount of light emitted through the second concave-convex microstructure 62 and entering the second color conversion structure 42, thereby balancing the light output of blue light and red light at a normal viewing angle and avoiding color deviation of the display panel.

[0073] The display panel includes, for example, a first light emitting element 31 , a second light emitting element 32 and a third light emitting element 33 . The first light emitting element 31 , the second light emitting element 32 and the third light emitting element 33 are, for example, blue LED chips. The first color conversion structure 41 may include a transparent material, the second color conversion structure 42 may include red quantum dots, and the third color conversion structure 43 may include green quantum dots. The conversion rate of the transparent material to light effect is greater than the conversion rate of the red quantum dots to light effect, and the conversion rate of the red quantum dots to light effect is greater than the conversion rate of the green quantum dots to light effect. Therefore, the structural density of the first concave-convex microstructure 61 is set to be smaller than the structural density of the second concave-convex microstructure 62, so that the amount of light emitted through the first concave-convex microstructure 61 and entering the first color conversion structure 41 is less than the amount of light emitted through the second concave-convex microstructure 62 and entering the second color conversion structure 42, and the amount of light emitted through the second concave-convex microstructure 62 and entering the second color conversion structure 42 is less than the amount of light emitted through the third concave-convex microstructure 63 and entering the third color conversion structure 43, thereby balancing the light output of red light, green light and blue light at a normal viewing angle to avoid color deviation of the display panel.

[0074] Optionally, the light emitting color of the light emitting element 3 is ultraviolet; the first color is red, and the second color is blue or green; or the first color is green, and the second color is blue; or the light emitting color of the light emitting element 3 is blue; the first color is blue, and the second color is red or green; or the first color is red, and the second color is green.

[0075] The arrangement of the concave structures 5 corresponding to different light-emitting units 2 can be understood with reference to the above embodiments, and will not be elaborated here.

[0076] Alternatively, if Figure 5 As shown, the width L1 of the concave structure 5 is equal to or greater than 0.5 microns, and the spacing L2 between adjacent concave structures 5 is equal to or greater than 0.5 microns; wherein the width L1 of the concave structure 5 is the width of the concave structure 5 in a direction parallel to the plane where the drive substrate 1 is located.

[0077] Specifically, Figure 2 As shown, considering the improvement of the light output of the light emitting element 3, the width of the concave structure 5 can be set to be equal to or greater than 0.5 microns, which can not only increase the surface area of ​​the first surface S1, so that more light can be emitted from the first surface S1 into the color conversion structure 4, but also reduce the difficulty of the roughening, dry etching or photolithography processes used when forming the concave structure 5. In addition, the embodiment of the present disclosure also sets the spacing between adjacent concave structures 5 to be equal to or greater than 0.5 microns to increase the number of concave structures 5, which can also increase the surface area of ​​the first surface S1, so that more light can be emitted from the first surface S1 into the color conversion structure 4, and improve the light output efficiency of the display panel.

[0078] Alternatively, if Figure 1 As shown, the depth h of the concave structure 5 is equal to or greater than 0.5 micrometers and less than or equal to 15 micrometers; wherein the depth h of the concave structure 5 is the depth of the concave structure 5 in a first direction, and the first direction is perpendicular to the plane where the drive substrate 1 is located.

[0079] Specifically, Figure 1 As shown, when the depth of the concave structure 5 is too large or too small, the process difficulty of forming the concave structure 5 will increase, and the light output of the light-emitting unit 2 will not continue to increase with the depth of the concave structure 5. Therefore, the embodiment of the present disclosure sets the depth of the concave structure 5 to be equal to or greater than 0.5 microns and less than or equal to 15 microns, which can not only increase the surface area of ​​the first surface S1, so that more light can be emitted from the first surface S1 into the color conversion structure 4, but also reduce the difficulty of roughening, dry etching or photolithography processes used in forming the concave structure 5.

[0080] Optionally, combined Figures 1 to 11 The color conversion structure 4 also surrounds at least part of the side surface of the light-emitting element 3 .

[0081] Specifically, combined Figures 1 to 11 Since the light emitting element 3 also emits light from the side, in order to avoid light waste and further improve the light extraction efficiency of the display panel, the embodiment of the present disclosure sets a color conversion structure 4 to surround at least part of the side of the light emitting element 3. Figures 1 to 11 In the figure, it is shown that the color conversion structure 4 surrounds all the sides of the light emitting element 3, so that the light emitted from the side of the light emitting element 3 enters the color conversion structure 4, and the color conversion structure 4 converges the light as much as possible to emit at the normal light output angle, thereby improving the light output efficiency and improving the display effect of the display panel. In other embodiments, the color conversion structure 4 may also be arranged to surround part of the side of the light emitting element 3, and the embodiments of the present disclosure are not limited to this.

[0082] Alternatively, if Figure 2 As shown, in a direction parallel to the plane where the driving substrate 1 is located, the width L3 of the color conversion structure 4 is equal to or greater than the width L4 of the light emitting element 3 .

[0083] Specifically, Figure 2 As shown, in a direction parallel to the plane where the driving substrate 1 is located, the width L3 of the color conversion structure 4 is set to be equal to or greater than the width L4 of the light emitting element 3, so that Figure 5 Taking the direction in the figure as an example, the light emitted from the top surface of the light emitting element 3 can enter the color conversion structure 4 as much as possible, and the color conversion structure 4 converges the light as much as possible to emit at the right angle of light emission, thereby avoiding the problem that when the width L3 of the color conversion structure 4 is smaller than the width L4 of the light emitting element 3, the light emitted from the top surface of the light emitting element 3 cannot enter the color conversion structure 4, causing light waste, thereby improving the light utilization rate. In addition, when the width L3 of the color conversion structure 4 is set to be larger than the width L4 of the light emitting element 3, at least part of the light emitted from the side of the light emitting element 3 can also enter the color conversion structure 4, further improving the light extraction efficiency.

[0084] Alternatively, if Figure 3 As shown, in a direction perpendicular to the plane where the driving substrate 1 is located, the thickness h3 of the color conversion structure 4 is greater than the thickness h4 of the light emitting element 3 .

[0085] Specifically, Figure 3 As shown, in the direction perpendicular to the plane where the driving substrate 1 is located, the thickness h3 of the color conversion structure 4 is greater than the thickness h4 of the light emitting element 3, so that the color conversion structure 4 can be embedded with the light emitting element 3, and the light emitted from the top surface of the light emitting element 3 and the light emitted from the side surface enter the color conversion structure 4 as much as possible, and are converged by the color conversion structure 4 to be emitted at a front light emitting angle, thereby improving the light emitting efficiency and improving the display effect of the display panel.

[0086] The embodiment of the present disclosure also provides a display device, which includes a display panel as described in any one of the above embodiments. Therefore, the display device has the technical features of the display panel provided in the embodiment of the present disclosure, and can achieve the beneficial effects of the display panel provided in the embodiment of the present disclosure. The similarities can be referred to the above description of the display panel provided in the embodiment of the present disclosure, and will not be repeated here.

[0087] For example, Fig.12 Schematic diagram of a display device provided by an embodiment of the present disclosure. Fig.12 As shown, the display device provided by the embodiment of the present disclosure includes the display panel 100 provided by any of the above embodiments of the present disclosure. Fig.12 The embodiment only takes a mobile phone as an example to illustrate the display device.

[0088] It can be understood that the display device provided in the embodiments of the present disclosure can be any electronic product with a display function, including but not limited to the following categories: mobile phones, televisions, laptops, desktop displays, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, medical equipment, industrial control equipment, touch interactive terminals, etc. The embodiments of the present invention do not specifically limit this.

[0089] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0090] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that: It includes a driving substrate and a light emitting unit electrically connected to one side of the driving substrate; The light-emitting unit includes a light-emitting element and a color conversion structure at least located on a side of the light-emitting element away from the driving substrate; The light emitting element comprises a first surface, the first surface faces the color conversion structure and is embedded with the color conversion structure, and the first surface is provided with at least one concave structure; The color conversion structure includes a second surface, wherein the second surface is at least located on a side of the color conversion structure away from the light emitting element and protrudes toward a side away from the light emitting element.

2. The display panel according to claim 1, characterized in that: The refractive index of the light emitting element is greater than the refractive index of the color conversion structure.

3. The display panel according to claim 2, characterized in that: The display panel comprises light-emitting units emitting light of different colors; in at least two light-emitting units emitting light of different colors, the depths of the concave structures of the light-emitting elements are different, and / or the numbers of the concave structures of the light-emitting elements are different; The depth of the concave structure is the depth of the concave structure in a first direction, and the first direction is perpendicular to the plane where the drive substrate is located.

4. The display panel according to claim 3, characterized in that: The light-emitting unit includes a first light-emitting unit and a second light-emitting unit, the first light-emitting unit includes a first light-emitting element and a first color conversion structure, the second light-emitting unit includes a second light-emitting element and a second color conversion structure, and the first light-emitting element and the second light-emitting element emit the same light color; The light emitted by the first light-emitting element emits a first color light after passing through the first color conversion structure, and the second light-emitting element emits a second color light after passing through the second color conversion structure, and the conversion rate of the first color conversion structure to the light effect is greater than the conversion rate of the second color conversion structure to the light effect; The first light-emitting element includes a first concave structure, the second light-emitting element includes a second concave structure, the depth of the first concave structure is less than the depth of the second concave structure, and / or the number of the first concave structures is less than the number of the second concave structures.

5. The display panel according to claim 3, characterized in that: The light-emitting unit includes a first light-emitting unit and a second light-emitting unit, the first light-emitting unit includes a first light-emitting element and a first color conversion structure, the second light-emitting unit includes a second light-emitting element and a second color conversion structure, and the first light-emitting element and the second light-emitting element emit the same light color; The light emitted by the first light-emitting element emits a first color light after passing through the first color conversion structure, and the second light-emitting element emits a second color light after passing through the second color conversion structure, and the conversion rate of the first color conversion structure to the light effect is greater than the conversion rate of the second color conversion structure to the light effect; The concave structure is in the shape of a concave arc; the arc curvature of the first concave structure is smaller than the arc curvature of the second concave structure.

6. The display panel according to claim 1, characterized in that: The inner concave structure also includes a concave-convex microstructure.

7. The display panel according to claim 6, characterized in that: The display panel includes light-emitting units that emit light of different colors; in at least two light-emitting units that emit light of different colors, the structural densities of the concave-convex microstructure are different.

8. The display panel according to claim 6, characterized in that: The light-emitting unit includes a first light-emitting unit and a second light-emitting unit, the first light-emitting unit includes a first light-emitting element and a first color conversion structure, the second light-emitting unit includes a second light-emitting element and a second color conversion structure, and the first light-emitting element and the second light-emitting element emit the same light color; The light emitted by the first light-emitting element emits a first color light after passing through the first color conversion structure, and the second light-emitting element emits a second color light after passing through the second color conversion structure, and the conversion rate of the first color conversion structure to the light effect is greater than the conversion rate of the second color conversion structure to the light effect; The first light-emitting element includes a first concave-convex microstructure, and the second light-emitting element includes a second concave-convex microstructure. The structural density of the first concave-convex microstructure is less than the structural density of the second concave-convex microstructure.

9. The display panel according to claim 4, 5 or 8, characterized in that: The light emitting color of the light emitting element is ultraviolet; the first color is red, and the second color is blue or green; or the first color is green, and the second color is blue; or, The light emitting element emits blue light; the first color is blue, and the second color is red or green; or the first color is red, and the second color is green.

10. The display panel according to claim 1, characterized in that: The width of the concave structure is equal to or greater than 0.5 micrometers, and the distance between adjacent concave structures is equal to or greater than 0.5 micrometers; The width of the concave structure is the width of the concave structure in a direction parallel to the plane where the drive substrate is located.

11. The display panel according to claim 1, characterized in that: The depth of the concave structure is equal to or greater than 0.5 micrometers and less than or equal to 15 micrometers; The depth of the concave structure is the depth of the concave structure in a first direction, and the first direction is perpendicular to the plane where the drive substrate is located.

12. The display panel according to claim 1, characterized in that: The color conversion structure also surrounds at least a portion of a side surface of the light emitting element.

13. The display panel according to claim 1, characterized in that: In a direction parallel to the plane where the driving substrate is located, the width of the color conversion structure is equal to or greater than the width of the light emitting element.

14. The display panel according to claim 1, characterized in that: In a direction perpendicular to the plane where the driving substrate is located, the thickness of the color conversion structure is greater than the thickness of the light emitting element.

15. A display device, characterized in that: A display panel comprising any one of claims 1 to 14.

Images