Display panel and display device

Abstract

The embodiment of the present application provides a display panel and a display device, including a substrate, a first light-emitting element layer, an optical conversion layer and a first reflective structure, wherein the first light-emitting element layer includes a plurality of first-color light-emitting devices, and the plurality of first-color light-emitting devices include a first light-emitting device; the optical conversion layer is located on a side of the first light-emitting element layer away from the substrate, and the optical conversion layer includes a first film layer, along the thickness direction of the display panel, the first film layer and the first light-emitting device at least partially overlap, and the light emitted by the first light-emitting device does not change color after being emitted through the first film layer; the first reflective structure is located between the first light-emitting element layer and the optical conversion layer, along the thickness direction of the display panel, at least part of the first film layer overlaps with the first reflective structure and the first light-emitting device; the first reflective structure is used to reflect the light of the first wavelength emitted by the first light-emitting device. The present application can reduce the damage of the light of the first wavelength emitted by the first light-emitting device to the human eye.

Description

[Technical field]

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

[0002] Micro light emitting diode (Micro-LED) display panels have the advantages of long life, high brightness, low power consumption and high resolution, and have become a hot topic in panel industry research.

[0003] In the prior art, in order to achieve full-color display of the display panel, the Micro-LED display panel usually includes a blue light-emitting device. However, the short-wave blue light emitted by the blue light-emitting device has extremely high energy and can penetrate the lens directly to the retina, thereby causing vision damage and seriously threatening our health. [Summary of the invention]

[0004] In view of this, embodiments of the present application provide a display panel and a display device to solve the above problems.

[0005] In a first aspect, an embodiment of the present application provides a display panel, comprising a substrate, a first light-emitting element layer, an optical conversion layer and a first reflective structure, wherein the first light-emitting element layer is located on one side of the substrate, the first light-emitting element layer comprises a plurality of first-color light-emitting devices, the plurality of first-color light-emitting devices comprises a first light-emitting device; the optical conversion layer is located on a side of the first light-emitting element layer away from the substrate, the optical conversion layer comprises a first film layer, along the thickness direction of the display panel, the projection of the first film layer at least partially overlaps with the first light-emitting device, and the color of the light emitted by the first light-emitting device remains unchanged after being emitted through the first film layer; the first reflective structure is located between the first light-emitting element layer and the optical conversion layer, along the thickness direction of the display panel, at least a portion of the projection of the first film layer overlaps with the projection of the first reflective structure and the projection of the first light-emitting device; the first reflective structure is used to reflect the light of the first wavelength emitted by the first light-emitting device.

[0006] In a second aspect, an embodiment of the present application provides a display device, comprising a display panel provided in the first aspect.

[0007] In an embodiment of the present application, a first reflective structure is provided between the first light-emitting device and the first film layer. This can reflect the light of the first wavelength emitted by the first light-emitting device without affecting the full-color display of the display panel, thereby helping to reduce the amount of light of the first wavelength emitted by the first light-emitting device that is emitted through the first film layer, thereby helping to reduce damage to the user's eyes caused by the light of the first wavelength emitted by the first light-emitting device.

Brief Description of the Drawings

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0009] Figure 1 A schematic diagram of the structure of a display panel provided in an embodiment of the present application;

[0010] Figure 2 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0011] Figure 3 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0012] Figure 4 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0013] Figure 5 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0014] Figure 6 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0015] Figure 7 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0016] Figure 8 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0017] Fig. 9 A schematic diagram of a display device provided in an embodiment of the present application. [Specific implementation method]

[0018] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0019] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0020] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0021] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0022] In the description of this specification, it is necessary to understand that the words such as "substantially", "approximately", "approximately", "about", "roughly", "substantially" and the like described in the claims and embodiments of the present application refer to what can be generally recognized within a reasonable process operation range or tolerance range, rather than an exact value.

[0023] It should be understood that although the terms first, second, etc. may be used to describe the light-emitting device, the reflective structure, the color film layer, etc. in the embodiments of the present application, these light-emitting devices, the reflective structure, the color film layer, etc. should not be limited to these terms. These terms are only used to distinguish the light-emitting device, the reflective structure, the color film layer, etc. from each other. For example, without departing from the scope of the embodiments of the present application, the first light-emitting device may also be referred to as the second light-emitting device, and similarly, the second light-emitting device may also be referred to as the first light-emitting device.

[0024] The applicant in this case has provided a solution to the problems existing in the prior art through careful and in-depth research.

[0025] Figure 1 A schematic diagram of the structure of a display panel provided in an embodiment of the present application.

[0026] The present application embodiment provides a display panel 01, such as Figure 1 As shown, the display panel 01 includes a substrate 11, a first light-emitting element layer 12, an optical conversion layer 13 and a first reflective structure 14. The first light-emitting element layer 12 is located on one side of the substrate. The first light-emitting element layer 12 includes a plurality of first color light-emitting devices 121. The first color light-emitting devices 121 emit first color light. The plurality of first color light-emitting devices 121 include a first light-emitting device 1211. Of course, the first light-emitting device 1211 emits first color light.

[0027] Optionally, the first color light emitting device 121 is a micro light emitting diode (Micro-LED) or a sub-millimeter light emitting diode (Mini-LED).

[0028] The optical conversion layer 13 is located on the side of the first light emitting element layer 12 away from the substrate 11 , and the optical conversion layer 13 may be a quantum dot film layer. The first color light emitted by the first color light emitting device 121 in the first light emitting element layer 12 may be emitted through the optical conversion layer 13 .

[0029] The optical conversion layer 13 includes a first film layer 131. Along the thickness direction Z of the display panel 01, the projection of the first film layer 131 at least partially overlaps with the first light-emitting device 1211. The color of the light emitted by the first light-emitting device 1211 remains unchanged after passing through the first film layer 131. That is, the first color light emitted by the first light-emitting device 1211 can be emitted through the first film layer 131, and the light emitted after passing through the first film layer 131 is still the first color light.

[0030] Optionally, along the thickness direction Z of the display panel 01 , the projection of the first film layer 131 covers the first light emitting device 1211 .

[0031] In addition, please continue to refer to Figure 1 The optical conversion layer 13 further includes a second color film layer 132 and a third color film layer 133. The plurality of first color light emitting devices 121 further include a second light emitting device 1212 and a third light emitting device 1213. Of course, the second light emitting device 1212 and the third light emitting device 1213 both emit first color light.

[0032] Along the thickness direction Z of the display panel 01, the second color film layer 132 overlaps with the second light emitting device 1212, and the third color film layer 133 overlaps with the third light emitting device 1213. The first color light emitted by the second light emitting device 1212 is emitted through the second color film layer 132, and the first color light emitted by the third light emitting device 1213 is emitted through the third color film layer 133.

[0033] When the first color light is irradiated to the second color film layer 132 corresponding to it, the second color quantum dots in the second color film layer 132 can be stimulated to generate the second color light and emit it. When the first color light is irradiated to the third color film layer 133 corresponding to it, the third color quantum dots in the third color film layer 133 can be stimulated to generate the third color light and emit it. Since the first color light is still the first color light after being emitted through the first film layer 131, the display panel 01 can achieve full-color display.

[0034] Optionally, the first color light emitting device 121 is a blue light emitting device, the second color film layer 132 is a red quantum dot film layer, and the third color film layer 133 is a green quantum dot film layer.

[0035] Optionally, the first film layer 131 is a blue film layer or the first film layer 131 is a transparent film layer, that is, the first film layer 131 can be a blue quantum dot film layer or a transparent film layer.

[0036] The first reflective structure 14 is located between the first light-emitting element layer 12 and the optical conversion layer 13. Along the thickness direction Z of the display panel 01, the projection of at least part of the first film layer 131 overlaps with the projection of the first reflective structure 14 and the projection of the first light-emitting device 1211, that is, at least part of the first film layer 131 overlaps with the projection of the first reflective structure 14 and the first light-emitting device 1211 on the same plane. The first color light emitted by the first light-emitting device 1211 can be emitted after passing through the first reflective structure 14 and the first film layer 131. The first reflective structure 14 is used to reflect the light of the first wavelength emitted by the first light-emitting device 1211.

[0037] That is to say, in the first color light emitted by the first light emitting device 1211 , the light with the first wavelength can be reflected by the first reflective structure 14 but cannot be emitted through the first reflective structure 14 and the first film layer 131 .

[0038] Of course, in the first color light emitted by the first light emitting device 1211 , except for the light with the first wavelength, the light with other wavelengths can be emitted after passing through the first reflective structure 14 and the first film layer 131 .

[0039] Specifically, the first color light emitting device 121 is a blue light emitting device, and the first wavelength is λ, λ≤450nm. That is, the first reflective structure 14 is used to reflect blue light with a wavelength not greater than 450nm.

[0040] It is understandable that blue light with a wavelength of no more than 450nm has higher energy and can penetrate the lens directly to the retina, causing the retina to produce free radicals. These free radicals can cause the retinal pigment epithelial cells to die. The death of epithelial cells can cause the photosensitive cells to lack nutrients and cause vision damage, seriously affecting the user's health.

[0041] In the embodiment of the present application, a first reflective structure 14 is arranged between the first light-emitting device 1211 and the first film layer 131. The light of the first wavelength emitted by the first light-emitting device 1211 can be reflected without affecting the full-color display of the display panel 01. This is beneficial to reducing the amount of light of the first wavelength emitted by the first light-emitting device 1211 that is emitted through the first film layer 131, thereby helping to reduce damage to the user's eyes caused by the light of the first wavelength emitted by the first light-emitting device 1211.

[0042] In an implementation of the embodiment of the present application, the first reflective structure 14 includes a photonic crystal material.

[0043] Optionally, the first reflective structure 14 includes at least one of a silicon dioxide-zirconium dioxide composite material, a silicon dioxide-titanium dioxide composite material, and a silicon dioxide-niobium pentoxide composite material.

[0044] Photonic crystal is an artificial microstructure formed by periodic arrangement of media with different refractive indices. Photonic crystal is a photonic bandgap material. From the perspective of material structure, photonic crystal is a type of artificially designed and manufactured crystal with a periodic dielectric structure on an optical scale. When electromagnetic waves propagate in photonic bandgap materials, they are modulated due to the existence of Bragg scattering, and the energy of the electromagnetic waves forms an energy band structure. Band gaps appear between energy bands, namely photonic band gaps. Photons with energy within the photonic bandgap cannot enter the crystal.

[0045] It can be seen from the characteristics of photonic crystals that the first reflective structure 14 of the embodiment of the present application includes a photonic crystal material, so that the first reflective structure 14 can reflect the light of the first wavelength emitted by the first light-emitting device 1211, while allowing light of other wavelengths to pass through the first reflective structure 14. Thus, the user's eyes can be protected from the first wavelength of light emitted by the first light-emitting device 1211 without affecting the full-color display of the display panel 01.

[0046] Figure 2 A schematic diagram of the structure of another display panel provided in an embodiment of the present application is shown in FIG. Figure 3 A schematic diagram of the structure of another display panel provided in an embodiment of the present application is shown in FIG. Figure 4 A schematic diagram of the structure of another display panel provided in an embodiment of the present application.

[0047] In one embodiment of the present application, Figure 2-Figure 4 As shown, the optical conversion layer 13 further includes a second color film layer 132 and a third color film layer 133, and the plurality of first color light emitting devices 121 further include a second light emitting device 1212 and a third light emitting device 1213. Along the thickness direction Z of the display panel 01, the projection of the second color film layer 132 at least partially overlaps with the second light emitting device 1212, and the projection of the third color film layer 133 at least partially overlaps with the third light emitting device 1213. That is, the first color light emitted by the second light emitting device 1212 can be emitted via the second color film layer 132, and the first color light emitted by the third light emitting device 1213 can be emitted via the third color film layer 133.

[0048] From the above analysis, it can be seen that the first color light can generate the second color light after being irradiated to the second color film layer 132, and the first color light can generate the third color light after being irradiated to the third color film layer 133. At the same time, the first color light is still the first color light after being emitted through the first film layer 131. Therefore, the display panel 01 can achieve full-color display.

[0049] Optionally, the first color light is blue light, the second color light is red light, and the third color light is green light.

[0050] The light of the first wavelength reflected by the first reflective structure 14 enters the second color film layer 132 and / or the third color film layer 133 .

[0051] That is to say, after being reflected by the first reflective structure 14 , the light of the first wavelength emitted by the first light emitting device 1211 may only enter the second color film layer 132 , or only enter the third color film layer 133 , or partially enter the second color film layer 132 and partially enter the third color film layer 133 .

[0052] For example, Figure 2 As shown, the first color light of the first wavelength reflected by the first reflective structure 14 is only incident on the second color film layer 132. Figure 3 As shown, the first color light of the first wavelength reflected by the first reflective structure 14 is only incident on the third color film layer 133. Figure 4 As shown, the first color light of the first wavelength reflected by the first reflective structure 14 partially enters the second color film layer 132 , and partially enters the third color film layer 133 .

[0053] Of course, the first color light of the first wavelength reflected by the first reflective structure 14 will be converted into the second color light after irradiating the second color film layer 132, and will be converted into the third color light after irradiating the third color film layer 133. It is still possible to prevent the first color light of the first wavelength from directly irradiating the user's eyes and causing damage to the user's eyes.

[0054] It can be understood that since the second color light is converted by the first color light irradiating the second color film layer 132, and the third color light is converted by the first color light irradiating the third color film layer 133, the light output efficiency of the second color light and the third color light in the display panel 01 is usually lower than the light output efficiency of the first color light, and color deviation problems are likely to occur when the display panel 01 is displayed.

[0055] The embodiment of the present application can increase the amount of second color light and / or third color light emitted while preventing the first color light of the first wavelength from harming the human eye, thereby helping to improve the light emission efficiency of the second color light and / or third color light, and further helping to improve the display quality of the display panel 01.

[0056] In a technical solution of an embodiment of the present application, Figure 2 As shown, the first reflective structure 14 includes at least one inclined surface 14A, which is located on a side of the first reflective structure 14 facing the first light emitting device 1211 , and is used to reflect light of the first wavelength emitted by the first light emitting device 1211 .

[0057] For details, please continue to refer to Figure 2The display panel 01 includes a second reflective structure 15 , which is located between the first light emitting device 1211 and the second light emitting device 1212 , and is located on a side of the first reflective structure 14 close to the substrate 11 .

[0058] Optionally, the second reflective structure 15 is connected to the first light emitting device 1211 and the second light emitting device 1212 .

[0059] The at least one inclined surface 14A includes a first inclined surface 14A1 . The second reflective structure 15 is used to receive the light of the first wavelength reflected by the first inclined surface 14A1 , and reflect the received light to the second color film layer 132 .

[0060] In the present technical solution, after the first color light emitted by the first light-emitting device 1211 is irradiated onto the first reflective structure 14, the first inclined surface 14A1 of the first reflective structure 14 can reflect the first color light of the first wavelength emitted by the first light-emitting device 1211 onto the second reflective structure 15. The second reflective structure 15 reflects the first color light of the first wavelength received by it into the second color film layer 132 and converts it into second color light to be emitted from the second color film layer 132, thereby improving the light extraction efficiency of the second color light.

[0061] In another technical solution of the embodiment of the present application, Figure 3 As shown, the display panel 01 further includes a third reflective structure 16 , which is located between the first light emitting device 1211 and the third light emitting device 1213 , and is located on a side of the first reflective structure 14 close to the substrate 11 .

[0062] Optionally, the third reflective structure 16 is connected to the first light emitting device 1211 and the third light emitting device 1213 .

[0063] At least one of the inclined surfaces 14A includes a second inclined surface 14A2 . The third reflective structure 16 is used to receive the light of the first wavelength reflected by the second inclined surface 14A2 , and reflect the received light to the third color film layer 133 .

[0064] In the present technical solution, after the first color light emitted by the first light-emitting device 1211 is irradiated onto the first reflective structure 14, the second inclined surface 14A2 of the first reflective structure 14 can reflect the first color light of the first wavelength emitted by the first light-emitting device 1211 onto the third reflective structure 16. The third reflective structure 16 reflects the first color light of the first wavelength received by it into the third color film layer 133, and converts it into third color light to be emitted from the third color film layer 133, thereby improving the light extraction efficiency of the third color light.

[0065] It should be noted that if Figure 4As shown, the first reflective structure 14 may include a first inclined surface 14A1 and a second inclined surface 14A2 at the same time, and a second reflective structure 15 and a third reflective structure 16 may be provided at the same time in the display panel 01. A portion of the first color light of the first wavelength emitted by the first light emitting device 1211 may be reflected by the first inclined surface 14A1 to the second reflective structure 15, and then reflected by the second reflective structure 15 to the second color film layer 132 and then converted into the second color light for emission; another portion may be reflected by the second inclined surface 14A2 to the third reflective structure 16, and then reflected by the third reflective structure 16 to the third color film layer 133 and then converted into the third color light for emission, thereby improving the light emission efficiency of the second color light and the third color light at the same time.

[0066] In one embodiment of the present application, please continue to refer to Figure 2 , the width of the second color film layer 132 in the first direction X is W1, the distance between the second color film layer 132 and the first film layer 131 in the first direction X is W2, the distance between the optical conversion layer 13 and the second reflective structure 15 is d1, the angle between the first inclined surface 14A1 and the plane where the optical conversion layer is located is θ1, and the first direction X is the arrangement direction of the second color film layer 132 and the first film layer 131.

[0067] Among them, (w2 / 2) / d1<tan2θ1<(w2 / 2+w1) / d1.

[0068] In the present application embodiment, Figure 2 As shown, according to mathematical theorems, the incident angle and reflection angle of the first color light of the first wavelength received by the second reflective structure 15 are both 2θ1, and (w2 / 2) / d1 is set to be less than tan2θ1 and less than (w2 / 2+w1) / d1. Then, the first color light of the first wavelength transmitted to the middle position of the second reflective structure 15 can be completely reflected to the second color film layer 132, which is beneficial for the second reflective structure 15 to reflect as much of the first color light of the first wavelength received by it as possible to the second color film layer 132, thereby converting it into the second color light for emission, which is beneficial to ensure the effect of improving the light emission efficiency of the second color light.

[0069] In one embodiment of the present application, Figure 3 As shown, the width of the third color film layer 133 in the first direction X is W3, the distance between the third color film layer 133 and the first film layer 131 in the first direction X is W4, the distance between the optical conversion layer 13 and the third reflective structure 16 is d2, the angle between the second inclined surface 14A2 and the plane where the optical conversion layer is located is θ2, and the first direction X is the arrangement direction of the third color film layer 133 and the first film layer 131.

[0070] Among them, (w4 / 2) / d2<tan2θ2<(w4 / 2+w3) / d2.

[0071] In the present application embodiment, Figure 3 As shown, according to mathematical theorems, the incident angle and reflection angle of the first color light of the first wavelength received by the third reflective structure 16 are both 2θ2, and (w4 / 2) / d2 is set to be less than tan2θ2 and less than (w4 / 2+w3) / d2. Then, the first color light of the first wavelength transmitted to the middle position of the third reflective structure 16 can be completely reflected to the third color film layer 133, which is beneficial for the third reflective structure 16 to reflect as much of the first color light of the first wavelength received by it as possible to the third color film layer 133, thereby converting it into the third color light for emission, which is beneficial to ensure the effect of improving the light output efficiency of the third color light.

[0072] Figure 5 A schematic diagram of the structure of another display panel provided in an embodiment of the present application is shown in FIG. Figure 6 A schematic diagram of the structure of another display panel provided in an embodiment of the present application is shown in FIG. Figure 7 A schematic diagram of the structure of another display panel provided in an embodiment of the present application.

[0073] In one embodiment of the present application, Figure 5-Figure 7 As shown, the display panel 01 further includes a filter structure 17, at least part of the filter structure 17 is located on the side of the first light-emitting element layer 12 away from the substrate 11, and along the thickness direction Z of the display panel 01, at least part of the projection of the first film layer 131 overlaps with the projection of the filter structure 17 and the projection of the first light-emitting device 1211, that is, at least part of the first film layer 131 overlaps with the projection of the filter structure 17 and the first light-emitting device 1211 on the same plane. The first color light emitted by the first light-emitting device 1211 can be emitted through the first film layer 131 and the filter structure 17.

[0074] The filter structure 17 is used to filter the light of the first wavelength emitted by the first light emitting device 1211. That is, the light of the first wavelength emitted by the first light emitting device 1211 can be absorbed by the filter structure 17, and thus cannot pass through the filter structure 17 and then be emitted.

[0075] Optionally, the filter structure 17 includes semiconductor nanoparticles coated or modified by silicon dioxide. In addition, the filter structure 17 can also be azo compounds, chromophore compounds, benzimidazolone compounds, alkoxyacetophenone compounds, and the like.

[0076] In a technical solution of an embodiment of the present application, Figure 5 and Figure 6 As shown, the filter structure 17 can be conformally attached to the surface of the first light-emitting device 1211 , that is, the filter structure 17 can cover the light-emitting surface of the first light-emitting device 1211 .

[0077] In another technical solution of the embodiment of the present application, Figure 7 As shown, the first film layer 131 is a transparent film layer, and the filter structure 17 is located in the first film layer 131. That is, the filter structure 17 can be filled in the first film layer 131 of the optical conversion layer 13.

[0078] In an embodiment of the present application, a first reflective structure 14 can be set above a portion of the first light-emitting device 1211 to reflect the first color light of the first wavelength emitted by the first light-emitting device 1211. A filtering structure 17 can also be set above a portion of the first light-emitting device 1211 to absorb the first color light of the first wavelength emitted by the first light-emitting device 1211. This is beneficial for increasing the structural diversity of the display panel 01 while preventing the first color light of the first wavelength from harming the human eye.

[0079] Figure 8 A schematic diagram of the structure of another display panel provided in an embodiment of the present application.

[0080] In one embodiment of the present application, Figure 8 As shown, the display panel 01 further includes a second light-emitting element layer A12, which is disposed in the same layer as the first light-emitting element layer 12. The second light-emitting element layer A12 includes a first color light-emitting device 121, a second color light-emitting device 122, and a third color light-emitting device 123. The first color light-emitting device 121 emits a first color light, the second color light-emitting device 122 emits a second color light, and the third color light-emitting device 123 emits a third color light.

[0081] The first color light emitting device 121 included in the second light emitting element layer A12 may have the same structure and material as the first color light emitting device 121 included in the first light emitting element layer 12. That is, the first color light emitting device 121 included in the second light emitting element layer A12 may be the same as the first color light emitting device 121 included in the first light emitting element layer 12.

[0082] The second color light emitting device 122 may be a red light emitting device, and the third color light emitting device 123 may be a green light emitting device. Of course, the second color light emitting device 122 and the third color light emitting device 123 may be micro light emitting diodes (Micro-LED) or sub-millimeter light emitting diodes (Mini-LED).

[0083] The display panel 01 further includes a filter structure 17, at least part of which is located on the side of the second light-emitting element layer A12 away from the substrate 11, and along the thickness direction Z of the display panel 01, the filter structure 17 overlaps with the first color light-emitting device 121 in the second light-emitting element layer A12, and the first color light emitted by the first color light-emitting device 121 in the second light-emitting element layer A12 can be emitted through the filter structure 17, and the filter structure 17 is used to filter the first wavelength of light emitted by the first color light-emitting device 121. That is, the filter structure 17 is used to filter the blue light with a wavelength not greater than 450nm emitted by the second light-emitting element layer A12.

[0084] Optionally, the filter structure 17 includes semiconductor nanoparticles coated or modified by silicon dioxide. In addition, the filter structure 17 can also be azo compounds, chromophore compounds, benzimidazolone compounds, alkoxyacetophenone compounds, and the like.

[0085] In the embodiment of the present application, the filtering structure 17 can filter the first wavelength of light emitted by the first color light-emitting device 121 in the second light-emitting element layer A12, thereby preventing the first wavelength of light emitted by the first color light-emitting device 121 in the second light-emitting element layer A12 from being emitted from the light-emitting surface of the display panel 01, which is beneficial to reduce the damage of the first wavelength of the first color light to the user's eyes.

[0086] In addition, a first color light emitting device 121, a second color light emitting device 122 and a third color light emitting device 123 are provided in the second light emitting element layer A12 as light sources, and the optical conversion layer 13 may be selectively not provided on the side of the second light emitting element layer A12 facing the light emitting surface of the display panel 01, thereby achieving full-color display, which is beneficial to reducing the preparation cost of the display panel 01.

[0087] Fig. 9 A schematic diagram of a display device provided in an embodiment of the present application.

[0088] The present application embodiment provides a display device 02, such as Fig. 9 As shown, the display device 02 includes the display panel 01 provided in the above embodiment. The display device 02 provided in the embodiment of the present application may be a mobile phone, in addition, the display device 02 provided in the embodiment of the present application may also be an electronic device such as a computer, a television, and a car display.

[0089] In the display device 02, a first reflective structure 14 is arranged between the first light-emitting device 1211 and the first film layer 131. This can reflect the light of the first wavelength emitted by the first light-emitting device 1211 without affecting the full-color display of the display device 02, which is beneficial to reducing the amount of light of the first wavelength emitted by the first light-emitting device 1211 that is emitted through the first film layer 131, thereby helping to reduce damage to the user's eyes caused by the light of the first wavelength emitted by the first light-emitting device 1211.

[0090] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A display panel, It is characterized in that include: substrate; A first light-emitting element layer, located at one side of the substrate, the first light-emitting element layer comprising a plurality of first-color light-emitting devices, wherein the plurality of first-color light-emitting devices include a first light-emitting device; an optical conversion layer, located on a side of the first light-emitting element layer away from the substrate, the optical conversion layer comprising a first film layer, a projection of the first film layer at least partially overlapping with the first light-emitting device along a thickness direction of the display panel, and light emitted by the first light-emitting device remains unchanged in color after exiting through the first film layer; a first reflective structure, wherein the first reflective structure is located between the first light-emitting element layer and the optical conversion layer, and along the thickness direction of the display panel, a projection of at least part of the first film layer overlaps with a projection of the first reflective structure and a projection of the first light-emitting device; the first reflective structure is used to reflect light of a first wavelength emitted by the first light-emitting device; The optical conversion layer includes a second color film layer and a third color film layer, the plurality of first color light emitting devices include a second light emitting device and a third light emitting device, and along the thickness direction of the display panel, a projection of the second color film layer at least partially overlaps with the second light emitting device, and a projection of the third color film layer at least partially overlaps with the third light emitting device; Wherein, the light of the first wavelength reflected by the first reflective structure is incident on the second color film layer and / or the third color film layer; The first reflective structure includes at least one inclined surface, and the inclined surface is located on a side of the first reflective structure facing the first light-emitting device, and the inclined surface is used to reflect light of a first wavelength emitted by the first light-emitting device.

2. The display panel according to claim 1, It is characterized in that The first color light emitting device is a blue light emitting device, and the first wavelength is λ, λ≤450nm.

3. The display panel according to claim 2, It is characterized in that The first reflective structure includes a photonic crystal material.

4. The display panel according to claim 3, It is characterized in that The first reflective structure includes at least one of a silicon dioxide-zirconium dioxide composite material, a silicon dioxide-titanium dioxide composite material, and a silicon dioxide-niobium pentoxide composite material.

5. The display panel according to claim 1, It is characterized in that The display panel comprises a second reflective structure, wherein the second reflective structure is located between the first light emitting device and the second light emitting device, and the second reflective structure is located on a side of the first reflective structure close to the substrate; At least one of the inclined surfaces includes a first inclined surface, and the second reflective structure is used to receive light of a first wavelength reflected by the first inclined surface, and reflect the received light to the second color film layer.

6. The display panel according to claim 5, It is characterized in that The width of the second color film layer in the first direction is w1, the distance between the second color film layer and the first film layer in the first direction is w2, the distance between the optical conversion layer and the second reflective structure is d1, and the angle between the first inclined surface and the plane where the optical conversion layer is located is θ1; the first direction is the arrangement direction of the second color film layer and the first film layer; Among them, (w2 / 2) / d1<tan2θ1<(w2 / 2+w1) / d1.

7. The display panel according to claim 1, It is characterized in that The display panel comprises a third reflective structure, wherein the third reflective structure is located between the first light emitting device and the third light emitting device, and the third reflective structure is located on a side of the first reflective structure close to the substrate; At least one of the inclined surfaces includes a second inclined surface, and the third reflective structure is used to receive the light of the first wavelength reflected by the second inclined surface, and reflect the received light to the third color film layer.

8. The display panel according to claim 2, It is characterized in that The first film layer is a blue film layer or a transparent film layer.

9. The display panel according to claim 8, It is characterized in that The display panel also includes a filtering structure, at least part of which is located on a side of the first light-emitting element layer away from the substrate, and along the thickness direction of the display panel, a projection of at least part of the first film layer overlaps with a projection of the filtering structure and a projection of the first light-emitting device; the filtering structure is used to filter light of a first wavelength emitted by the first light-emitting device.

10. The display panel according to claim 9, It is characterized in that The filter structure is attached to the surface of the first light emitting device.

11. The display panel according to claim 9, It is characterized in that The first film layer is a transparent film layer, and the filtering structure is located in the first film layer.

12. The display panel according to claim 2, It is characterized in that The display panel further includes a second light-emitting element layer, which is disposed on the same layer as the first light-emitting element layer, and includes a first color light-emitting device, a second color light-emitting device, and a third color light-emitting device; The display panel also includes a filtering structure, at least part of which is located on a side of the second light-emitting element layer away from the substrate, and along the thickness direction of the display panel, the filtering structure overlaps with the first color light-emitting device in the second light-emitting element layer; the filtering structure is used to filter the first wavelength of light emitted by the first color light-emitting device.

13. The display panel according to claim 9 or 12, It is characterized in that The filtering structure includes semiconductor nanoparticles coated or modified with silicon dioxide.

14. A display device, It is characterized in that Comprising a display panel as described in any one of claims 1-13.

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