Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel comprises an array substrate, a light-emitting device layer, a packaging layer, a color filter layer and a color conversion layer, the light-emitting device layer and the packaging layer are arranged on one side of the array substrate in a stacked mode, and the packaging layer packages the light-emitting device layer. The color filter layer is located on the side, away from the array substrate, of the packaging layer and comprises a blue filter layer, a green filter layer and a red filter layer. The color conversion layer is located between the packaging layer and the color filter layer, and the color conversion layer comprises a first upper conversion material layer located on the side, close to the packaging layer, of the blue filter layer; wherein the first up-conversion material layer absorbs first light rays with energy lower than a first preset value, and converts the first light rays into second light rays; the second light is blue light, and the first preset value is smaller than the energy range of the second light. The first up-conversion material layer is arranged on the side, close to the packaging layer, of the blue filter layer, so that the light emitting efficiency of the display panel can be improved, and the overall service life of the display panel is prolonged.

Description

Technical Field

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

[0002] Silicon-based organic light-emitting diode (OLED) displays have developed rapidly due to their advantages of high brightness, rich colors, low driving voltage, fast response speed and low power consumption. As the demand for VR / AR market expands, the demand for high-resolution, high-brightness, high-color gamut and micro-display devices is becoming more and more urgent.

[0003] However, with the improvement of display resolution, the conventional white light plus color glue solution, in order to comprehensively consider the final white light balance, usually the white light device structure will try to enhance the luminous intensity of blue light, thereby suppressing the light output efficiency of green and red light. On the one hand, this reduces the overall device light output efficiency and objectively increases the power consumption of the device. On the other hand, the commonly used blue light materials have a relatively low lifespan, which in turn reduces the lifespan of the overall device. Summary of the invention

[0004] The present invention provides a display panel and a display device, which can improve the light extraction efficiency of the display panel and increase the overall life of the display panel.

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

[0006] An array substrate;

[0007] A light emitting device layer and a packaging layer stacked on one side of the array substrate, wherein the packaging layer packages the light emitting device layer;

[0008] A color filter layer is located on a side of the encapsulation layer away from the array substrate; the color filter layer includes a blue filter layer, a green filter layer and a red filter layer;

[0009] A color conversion layer is further included between the encapsulation layer and the color filter layer, and the color conversion layer includes a first up-conversion material layer located on a side of the blue filter layer close to the encapsulation layer;

[0010] The first up-conversion material layer absorbs first light whose energy is lower than a first preset value, and converts the first light into second light; the second light is blue light, and the first preset value is smaller than the energy range of the second light.

[0011] Optionally, the light-emitting device layer includes light-emitting devices;

[0012] The light emitted by the light emitting device includes red light and green light, the first light includes the red light and / or the green light, and the first up-conversion material layer absorbs the red light and / or the green light and emits blue light.

[0013] Optionally, the light emitted by the light emitting device also includes blue light.

[0014] Optionally, the color conversion layer further includes a first down-conversion material layer located on a side of the red filter layer close to the encapsulation layer;

[0015] The first down-conversion material layer absorbs third light whose energy is higher than a second preset value, and converts the third light into a fourth light; the fourth light is red light, and the second preset value is greater than the energy range of the fourth light.

[0016] Optionally, the light emitting device layer includes a light emitting device, the light emitted by the light emitting device includes blue light and green light, the third light includes blue light and / or green light, and the first down-conversion material layer absorbs the blue light and / or the green light and emits red light.

[0017] Optionally, the color conversion layer further includes a second up-conversion material layer located on a side of the green filter layer close to the encapsulation layer;

[0018] Wherein, the second up-conversion material layer absorbs a fifth light whose energy is lower than the third preset value, and converts the fifth light into a sixth light; the sixth light is green light, the third preset value is lower than the first preset value, and the third preset value is lower than the energy range of the sixth light;

[0019] Alternatively, the color conversion layer further includes a second down-conversion material layer located on a side of the green filter layer close to the encapsulation layer;

[0020] Among them, the second down-conversion material layer absorbs the seventh light whose energy is higher than the fourth preset value, and converts the seventh light into the eighth light; the eighth light is green light, the fourth preset value is greater than the first preset value, and the fourth preset value is greater than the energy range of the eighth light.

[0021] Optionally, the light-emitting device layer includes light-emitting devices;

[0022] Among them, the light emitted by the light emitting device includes red light, green light and blue light; the fifth light includes the red light, the second up-conversion material layer absorbs the red light and emits green light; the seventh light includes the blue light, the second down-conversion material layer absorbs the blue light and emits green light.

[0023] Optionally, the method further includes: a planarization layer, wherein the planarization layer is located between the encapsulation layer and the color filter layer, and the color conversion layer is located in the planarization layer.

[0024] Optionally, it further includes: a microlens layer, which is located on a side of the color filter layer away from the array substrate and is configured to respectively converge the light passing through the blue filter layer, the green filter layer and the red filter layer.

[0025] In a second aspect, an embodiment of the present invention further provides a display device, characterized in that it comprises the display panel described in any embodiment of the first aspect.

[0026] In the embodiment of the present invention, a first up-conversion material layer is disposed on the side of the blue filter layer close to the encapsulation layer. Since the first up-conversion material layer can absorb the first light with energy lower than the first preset value and convert it into blue light, the intensity of the blue light can be increased. At the same time, since the first light with energy lower than the first preset value that should have been filtered out by the color filter layer is converted into blue light by the first up-conversion material layer, the luminous efficiency of the overall device is greatly improved. Since part of the blue light emitted by the display panel is converted from the first light, the dependence on the blue light material is objectively reduced, and the life of the overall device is greatly improved.

[0027] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A cross-sectional view of a display panel provided by an embodiment of the present invention;

[0030] Figure 2 A cross-sectional view of another display panel provided by an embodiment of the present invention;

[0031] Figure 3 A cross-sectional view of another display panel provided by an embodiment of the present invention;

[0032] Figure 4 A cross-sectional view of another display panel provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] Figure 1 A cross-sectional view of a display panel provided by an embodiment of the present invention, referring to Figure 1 The display panel includes: an array substrate 100, a light emitting device layer 200, an encapsulation layer 300, a color filter layer 400 and a color conversion layer 500. The light emitting device layer 200 and the encapsulation layer 300 are stacked on one side of the array substrate 100, and the encapsulation layer 300 encapsulates the light emitting device layer 200; the color filter layer 400 is located on the side of the encapsulation layer 300 away from the array substrate 100; the color filter layer 400 includes a blue filter layer 410, a green filter layer 420 and a red filter layer 430; the color conversion layer 500 is located between the encapsulation layer 300 and the color filter layer 400, and the color conversion layer 500 includes a first up-conversion material layer 510 located on the side of the blue filter layer 410 close to the encapsulation layer 300. The first up-conversion material layer 510 absorbs a first light whose energy is lower than a first preset value, and converts the first light into a second light; the second light is blue light, and the first preset value is less than the energy range of the second light.

[0036] It should be noted that the composition of the first up-conversion material layer 510 provided in the embodiment of the present invention can be freely set, as long as the first up-conversion material layer 510 is set on the side of the blue filter layer 410 close to the encapsulation layer 300, it can absorb two or more low-energy photons, reach the luminescent energy level through non-radiative relaxation, and then transition to the ground state to emit high-energy blue light photons. Exemplarily, the composition of the first up-conversion material layer 510 includes but is not limited to lanthanide doping materials, such as Yb3+ and Er 3+ , Yb 3+ and Ho 3+ and Yb 3+ and Tm 3+ The substrate includes but is not limited to fluorides (such as NaYF4, etc.) and oxides (such as Y2SiO5, etc.), the first up-conversion material layer 510 can be prepared into a core-shell structure to make nanoparticles, which are dispersed in an organic solvent to form glue, and can be prepared on the side of the blue filter layer 410 close to the encapsulation layer 300 by exposure and development.

[0037] In the embodiment of the present invention, a first up-conversion material layer 510 is disposed on the side of the blue filter layer 410 close to the encapsulation layer 300. Since the first up-conversion material layer 510 can absorb the first light with energy lower than the first preset value and convert it into blue light, the intensity of the blue light can be increased. At the same time, since the first light with energy lower than the first preset value that should have been filtered out by the color filter layer 400 is converted into blue light by the first up-conversion material layer 510, the luminous efficiency of the overall device is greatly improved. Since part of the blue light emitted by the display panel is converted from the first light, the dependence on the blue light material is objectively reduced, and the life of the overall device is greatly improved.

[0038] Optionally, based on the above embodiment, the light emitting device layer 200 includes a light emitting device, wherein the light emitted by the light emitting device includes red light and green light, the first light includes red light and / or green light, and the first up-conversion material layer 510 absorbs red light and / or green light and emits blue light.

[0039] It should be noted that the energy of blue light is greater than the energy of green light, and the energy of green light is greater than the energy of red light.

[0040] It can be understood that the light emitted by the light-emitting device in the embodiment of the present invention does not include blue light, but the first up-conversion material layer 510 can absorb the energy of red light and green light irradiated by the light-emitting device on the blue light pixel position corresponding to the blue filter layer 410, and convert it into blue light emission, which can ensure the overall light-emitting effect of the display panel and simplify the device preparation process.

[0041] Optionally, based on the above embodiment, the light emitted by the light emitting device also includes blue light.

[0042] It is understandable that the light emitted by the light emitting device in the embodiment of the present invention includes blue light, green light and red light. When the first up-conversion material layer 510 is arranged on the side of the blue filter layer 410 close to the encapsulation layer 300, it can absorb the red light and green light emitted from the light emitting device layer 200 and convert them into blue light, thereby increasing the intensity of the blue light. At the same time, since the first light whose energy is lower than the first preset value and should be filtered out by the color filter layer 400 is converted into blue light by the first up-conversion material layer 510, the luminous efficiency of the overall device is greatly improved. Since part of the blue light emitted by the display panel is converted from the first light, the dependence on the blue light material is objectively reduced, and the life of the overall device is greatly improved.

[0043] Figure 2 A cross-sectional view of another display panel provided in an embodiment of the present invention. Optionally, based on the above embodiment, refer to Figure 2 The color conversion layer 500 further includes a first down-conversion material layer 520 located on the side of the red filter layer 430 close to the encapsulation layer 300. The first down-conversion material layer 520 absorbs the third light whose energy is higher than the second preset value, and converts the third light into a fourth light; the fourth light is red light, and the second preset value is greater than the energy range of the fourth light.

[0044] It should be noted that the components of the first down-conversion material layer 520 provided in the embodiment of the present invention can be freely set, as long as the first down-conversion material layer 520 is set on the side of the red filter layer 430 close to the encapsulation layer 300, it can absorb high-energy photons and emit low-energy red light. Exemplarily, the components of the first down-conversion material layer 520 include but are not limited to CdSe, perovskite quantum dots, etc., and can also be prepared into a core-shell structure to make nanoparticles, dispersed in an organic solvent to prepare glue, and can be prepared on the side of the red filter layer 430 close to the encapsulation layer 300 by exposure and development. And the luminescent color can be adjusted according to the size of the quantum dots to emit red light.

[0045] In the embodiment of the present invention, the first down-conversion material layer 520 is arranged on the side of the red filter layer 430 close to the encapsulation layer 300. Since the first down-conversion material layer 520 can absorb the third light with energy higher than the second preset value and convert it into red light, the intensity of the red light can be increased. At the same time, since the third light with energy higher than the second preset value that should have been filtered out by the color filter layer 400 is converted into red light by the first down-conversion material layer 520, the luminous efficiency of the overall device is greatly improved. Since part of the red light emitted by the display panel is converted from the third light, the dependence on the red light material is objectively reduced, and the life of the overall device is greatly improved.

[0046] Optionally, based on the above embodiments, the light-emitting device layer 200 includes a light-emitting device, the light emitted by the light-emitting device includes blue light and green light, the third light includes blue light and / or green light, and the first down-conversion material layer 520 absorbs blue light and / or green light and emits red light.

[0047] It can be understood that the light emitted by the light-emitting device in the embodiment of the present invention does not include red light, but the first down-conversion material layer 520 can absorb the energy of blue light and green light irradiated by the light-emitting device on the red light pixel position corresponding to the red filter layer 430, and convert it into red light emission, which can ensure the overall light-emitting effect of the display panel and simplify the device preparation process.

[0048] Figure 3 A cross-sectional view of another display panel provided in an embodiment of the present invention. Optionally, based on the above embodiment, refer to Figure 3 The color conversion layer 500 further includes a second up-conversion material layer 530 located on the side of the green filter layer 420 close to the encapsulation layer 300. The second up-conversion material layer 530 absorbs the fifth light whose energy is lower than the third preset value, and converts the fifth light into the sixth light; the sixth light is green light, the third preset value is lower than the first preset value, and the third preset value is lower than the energy range of the sixth light.

[0049] It should be noted that the composition of the second up-conversion material layer 530 provided in the embodiment of the present invention can be freely set, as long as the second up-conversion material layer 530 is arranged on the side of the green filter layer 420 close to the encapsulation layer 300, it can absorb low-energy photons and emit green light. Exemplarily, the composition of the second up-conversion material layer 530 includes but is not limited to Nd doped 3+ , Yb 3+ and Er 3+ Single-doped or double-doped materials, whose doped matrix materials include but are not limited to fluorides (NaYF4, LaF3 and CaF2, etc.), oxides, fluoride oxides, halides and sulfur-containing compounds. The second up-conversion material layer 530 can be prepared into a core-shell structure to make nanoparticles, which are dispersed in an organic solvent to prepare glue, and can be prepared on the side of the green filter layer 420 close to the encapsulation layer 300 by exposure and development.

[0050] In the embodiment of the present invention, the second up-conversion material layer 530 is arranged on the side of the green filter layer 420 close to the encapsulation layer 300. Since the second up-conversion material layer 530 can absorb the fifth light whose energy is lower than the third preset value and convert it into green light, the intensity of the green light can be improved. At the same time, since the fifth light whose energy is lower than the third preset value that should have been filtered out by the color filter layer 400 is converted into green light by the second up-conversion material layer 530, the luminous efficiency of the overall device is greatly improved. Since part of the green light emitted by the display panel is converted from the fifth light, the dependence on the green light material is objectively reduced, and the life of the overall device is greatly improved.

[0051] Or, continue to refer to Figure 3 The color conversion layer 500 further includes a second down-conversion material layer 540 located on the side of the green filter layer 420 close to the encapsulation layer 300. The second down-conversion material layer 540 absorbs the seventh light whose energy is higher than the fourth preset value, and converts the seventh light into the eighth light; the eighth light is green light, the fourth preset value is greater than the first preset value, and the fourth preset value is greater than the energy range of the eighth light.

[0052] It should be noted that the components of the second down-conversion material layer 540 provided in the embodiment of the present invention can be freely set, as long as the second down-conversion material layer 540 is set on the side of the green filter layer 420 close to the encapsulation layer 300, it can absorb high-energy photons and emit green light. Exemplarily, the components of the second down-conversion material layer 540 include but are not limited to CdSe, perovskite quantum dots, etc., and can also be prepared into a core-shell structure to make nanoparticles, dispersed in an organic solvent to prepare glue, and can be prepared on the side of the red filter layer 430 close to the encapsulation layer 300 by exposure and development. And the luminescent color can be adjusted according to the size of the quantum dots to emit green light.

[0053] In the embodiment of the present invention, the second down-conversion material layer 540 is arranged on the side of the green filter layer 420 close to the encapsulation layer 300. Since the second down-conversion material layer 540 can absorb the seventh light with energy higher than the fourth preset value and convert it into green light, the intensity of the green light can be improved. At the same time, since the seventh light with energy higher than the fourth preset value that should have been filtered out by the color filter layer 400 is converted into red light by the second down-conversion material layer 540, the luminous efficiency of the overall device is greatly improved. Since part of the green light emitted by the display panel is converted from the seventh light, the dependence on the green light material is objectively reduced, and the life of the overall device is greatly improved.

[0054] Optionally, based on the above embodiments, the light-emitting device layer 200 includes a light-emitting device; wherein the light emitted by the light-emitting device includes red light, green light and blue light; the fifth light includes red light, the second up-conversion material layer 530 absorbs red light and emits green light; the seventh light includes blue light, the second down-conversion material layer 540 absorbs blue light and emits green light.

[0055] It can be understood that the light emitted by the light emitting device in the embodiment of the present invention includes blue light, green light and red light. When the second up-conversion material layer 530 is arranged on the side of the green filter layer 420 close to the encapsulation layer 300, it can absorb the red light emitted from the light emitting device layer 200 and convert it into green light, thereby increasing the intensity of the green light. At the same time, since the fifth light whose energy is lower than the third preset value and should be filtered out by the color filter layer 400 is converted into green light by the first up-conversion material layer 510, the luminous efficiency of the overall device is greatly improved. Since part of the green light emitted by the display panel is converted from the fifth light, the dependence on the green light material is objectively reduced, and the life of the overall device is greatly improved.

[0056] Figure 4 A schematic diagram of another display panel structure provided by an embodiment of the present invention. Optionally, based on the above embodiment, refer to Figure 4 The display panel further includes a planarization layer 600 , the planarization layer 600 is located between the encapsulation layer 300 and the color filter layer 400 , and the color conversion layer 500 is located in the planarization layer 600 .

[0057] It can be understood that the planarization layer 600 is disposed between the encapsulation layer 300 and the color filter layer 400 in the embodiment of the present invention, which is conducive to preparing the color filter layer 400 on a flat surface. Exemplarily, when the first up-conversion material layer 510 is disposed on the side of the blue filter layer 410 close to the encapsulation layer 300, the planarization layer 600 is disposed at the vacant position of the green filter layer 420 and the red filter layer 430 close to the encapsulation layer 300 and the surface of the first up-conversion material layer 510 close to the color filter layer 400. On this basis, when the first down-conversion material layer 520 is disposed on the side of the red filter layer 430 close to the encapsulation layer 300, the planarization layer 600 is disposed at the vacant position of the green filter layer 420 close to the encapsulation layer 300 and the surface of the first up-conversion material layer 510 and the first down-conversion material layer 520 close to the color filter layer 400. On this basis, when the second up-conversion material layer 530 or the second down-conversion material layer 540 is arranged on the side of the green filter layer 420 close to the encapsulation layer 300, the planarization layer 600 is arranged on the surface of the first up-conversion material layer 510, the first down-conversion material layer 520, and the second up-conversion material layer 530 / the second down-conversion material layer 540 close to the color filter layer 400. Optionally, based on the above embodiment, continue to refer to Figure 4, the display panel further includes a microlens layer 700. The microlens layer 700 is located on the side of the color filter layer 400 away from the array substrate 100, and is configured to respectively converge the light passing through the blue filter layer 410, the green filter layer 420, and the red filter layer 430. In the embodiment of the present invention, the microlens layer 700 is arranged on the side of the color filter layer 400 away from the array substrate 100, which can further improve the light extraction efficiency and reduce the power consumption of the display panel.

[0058] In summary, the embodiment of the present invention sets the first up-conversion material layer 510 on the side of the blue filter layer 410 close to the encapsulation layer 300, which can improve the luminous efficiency and device life. It can be applied to conventional light-emitting devices whose emitted light includes blue light, green light and red light, and it can also be applied to light-emitting devices whose emitted light does not include blue light. On the basis of setting the first up-conversion material layer 510 on the side of the blue filter layer 410 close to the encapsulation layer 300, the first down-conversion material layer 520 can be set on the side of the red filter layer 430 close to the encapsulation layer 300, further improving the luminous efficiency and device life. It can be applied to conventional light-emitting devices whose emitted light includes blue light, green light and red light, and it can also be applied to light-emitting devices whose emitted light does not include red light. The second up-conversion material layer 530 can also be set on the side of the green filter layer 420 close to the encapsulation layer 300, or the second down-conversion material layer 540 can be set on the side of the green filter layer 420 close to the encapsulation layer 300, further improving the luminous efficiency and device life. The planarization layer 600 is arranged between the encapsulation layer 300 and the color filter layer 400, which is conducive to preparing the color filter layer 400 on a flat surface. The microlens layer 700 is arranged on the side of the color filter layer 400 away from the array substrate 100, which can further improve the light extraction efficiency and reduce the power consumption of the display panel.

[0059] An embodiment of the present invention further provides a display device, comprising the display panel provided by any of the above embodiments.

[0060] Since the display device provided in the embodiment includes the display panel provided in any of the above embodiments, it has the same beneficial effects. For the contents not described in detail in this embodiment, reference may be made to the display panel provided in the above embodiments.

[0061] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A display panel, characterized in that: include: An array substrate; A light emitting device layer and a packaging layer stacked on one side of the array substrate, wherein the packaging layer packages the light emitting device layer; A color filter layer is located on a side of the encapsulation layer away from the array substrate; the color filter layer includes a blue filter layer, a green filter layer and a red filter layer; A color conversion layer is further included between the encapsulation layer and the color filter layer, and the color conversion layer includes a first up-conversion material layer located on a side of the blue filter layer close to the encapsulation layer; The first up-conversion material layer absorbs first light whose energy is lower than a first preset value, and converts the first light into second light; the second light is blue light, and the first preset value is smaller than the energy range of the second light.

2. The display panel according to claim 1, characterized in that: The light emitting device layer includes light emitting devices; The light emitted by the light emitting device includes red light and green light, the first light includes the red light and / or the green light, and the first up-conversion material layer absorbs the red light and / or the green light and emits blue light.

3. The display panel according to claim 2, characterized in that: The light emitted by the light emitting device also includes blue light.

4. The display panel according to claim 1, characterized in that: The color conversion layer further includes a first down-conversion material layer located on a side of the red filter layer close to the encapsulation layer; The first down-conversion material layer absorbs third light whose energy is higher than a second preset value, and converts the third light into a fourth light; the fourth light is red light, and the second preset value is greater than the energy range of the fourth light.

5. The display panel according to claim 4, characterized in that: The light emitting device layer includes a light emitting device, the light emitted by the light emitting device includes blue light and green light, the third light includes blue light and / or green light, and the first down-conversion material layer absorbs the blue light and / or the green light and emits red light.

6. The display panel according to claim 1, characterized in that: The color conversion layer further includes a second up-conversion material layer located on a side of the green filter layer close to the encapsulation layer; Wherein, the second up-conversion material layer absorbs a fifth light whose energy is lower than the third preset value, and converts the fifth light into a sixth light; the sixth light is green light, the third preset value is lower than the first preset value, and the third preset value is lower than the energy range of the sixth light; Alternatively, the color conversion layer further includes a second down-conversion material layer located on a side of the green filter layer close to the encapsulation layer; Among them, the second down-conversion material layer absorbs the seventh light whose energy is higher than the fourth preset value, and converts the seventh light into the eighth light; the eighth light is green light, the fourth preset value is greater than the first preset value, and the fourth preset value is greater than the energy range of the eighth light.

7. The display panel according to claim 6, characterized in that: The light emitting device layer includes light emitting devices; Among them, the light emitted by the light emitting device includes red light, green light and blue light; the fifth light includes the red light, the second up-conversion material layer absorbs the red light and emits green light; the seventh light includes the blue light, the second down-conversion material layer absorbs the blue light and emits green light.

8. The display panel according to claim 1, characterized in that: Also includes: A planarization layer is located between the encapsulation layer and the color filter layer, and the color conversion layer is located in the planarization layer.

9. The display panel according to claim 1, characterized in that: It also includes: a microlens layer, which is located on a side of the color filter layer away from the array substrate and is configured to respectively converge the light passing through the blue filter layer, the green filter layer and the red filter layer.

10. A display device, characterized in that: A display panel comprising any one of claims 1 to 9.

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