CN111863925A - Display panel, display device and display panel manufacturing method - Google Patents
Display panel, display device and display panel manufacturing method Download PDFInfo
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- CN111863925A CN111863925A CN202010760036.5A CN202010760036A CN111863925A CN 111863925 A CN111863925 A CN 111863925A CN 202010760036 A CN202010760036 A CN 202010760036A CN 111863925 A CN111863925 A CN 111863925A
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- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
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- H—ELECTRICITY
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Abstract
The invention relates to a display panel, a display device and a display panel manufacturing method, and relates to the technical field of display. The main technical scheme adopted is as follows: a display panel, comprising: the array substrate, the ultraviolet light emitting device, the color conversion layer and the photonic crystal layer; the ultraviolet light-emitting device is arranged on one side of the array substrate and used for emitting ultraviolet light; the color conversion layer is arranged on one side of the ultraviolet light emitting device, which is far away from the array substrate, and is used for converting ultraviolet light into visible light with different colors; the photon crystal layer is arranged on one side of the color conversion layer, which is far away from the ultraviolet light emitting device, and is used for preventing ultraviolet light from emitting and increasing the emission intensity of the visible light converted by the color conversion layer. The display panel solves the technical problems of high energy consumption and light leakage of the existing OLED display panel.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a display device and a display panel manufacturing method.
Background
Organic Light-Emitting diodes (OLEDs) are active Light-Emitting display devices and have the advantages of wide viewing angle, almost infinite contrast, low power consumption, very high response speed, and the like.
However, in the prior art, due to the limitation of a Fine Metal Mask (FMM), a side-by-side (side-by-side) display pixel structure cannot be adopted for large-size OLED display, and currently, a structural design of a backlight source and a color film is mainly adopted, and the following two schemes are specifically adopted: white organic electroluminescent device (WOLED) + Color Film (CF) and blue organic electroluminescent device (BOLED) + quantum dot film (QD). For WOLED + CF, the backlight adopts a white OLED, the white light passes through a three-color film and then two peaks are filtered to generate R/G/B three primary colors to participate in display, but the brightness of the white light passes through the color film and then is attenuated by 80%, a large amount of energy is converted into heat energy to be dissipated, so that not only is the energy consumption improved, but also the heat energy dissipation can cause the temperature of equipment to rise, and the service life is reduced; for BOLED + QD, the deep blue OLED is used as a backlight source, the quantum dots are used as a lower conversion layer, the energy utilization rate is greatly improved compared with that of the BOLED + QD, but the QD lower conversion layer cannot realize 100% of complete color conversion, so that a small amount of blue light is emitted (namely, light leakage) in an R/G color film area, and the color gamut of a product is seriously influenced.
Therefore, the above technical problems are urgently needed to be solved.
Disclosure of Invention
The invention mainly aims to provide a display panel with a novel structure, a display device and a display panel manufacturing method, so that the technical problems of high energy consumption and light leakage of the existing OLED display panel can be solved.
The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. According to the present invention, a display panel is provided, which includes:
an array substrate;
the ultraviolet light emitting device is arranged on one side of the array substrate and used for emitting ultraviolet light;
the color conversion layer is arranged on one side, far away from the array substrate, of the ultraviolet light emitting device and is used for converting ultraviolet light into visible light of different colors;
and the photonic crystal layer is arranged on one side of the color conversion layer, which is far away from the ultraviolet light emitting device, and is used for preventing ultraviolet light from emitting and increasing the emission intensity of the visible light converted by the color conversion layer.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
Optionally, in the foregoing display panel, the color conversion layer includes a plurality of color conversion layers capable of converting visible light of different colors, and the plurality of color conversion layers are disposed at intervals and are in one-to-one correspondence with the switching tubes of the array substrate.
Optionally, the display panel, wherein the ultraviolet light emitting device comprises:
the first electrode layer, the ultraviolet light-emitting layer and the second electrode layer are sequentially stacked on one side of the array substrate;
the first electrode layers are formed at intervals to form a plurality of first electrodes which are opposite to the switch tubes of the array substrate one by one, and the orthographic projection of each color conversion layer on the substrate covers the orthographic projection of one first electrode on the substrate.
Optionally, in the display panel, the photonic crystal layer includes a two-dimensional photonic crystal layer and a three-dimensional photonic crystal layer which are stacked;
the two-dimensional photonic crystal layer is used for increasing the emergence intensity of the visible light converted by the color conversion layer, and the three-dimensional photonic crystal layer has a band gap for blocking an ultraviolet band and is used for preventing ultraviolet light from emerging.
Optionally, the display panel, wherein the three-dimensional photonic crystal layer is disposed between the color conversion layer and the two-dimensional photonic crystal layer;
or, the two-dimensional photonic crystal layer is disposed between the color conversion layer and the three-dimensional photonic crystal layer.
Optionally, in the display panel, the two-dimensional photonic crystal layers are multiple, the multiple two-dimensional photonic crystal layers are respectively opposite to the multiple color conversion layers, and a band gap of each two-dimensional photonic crystal layer corresponds to a band of visible light converted by the opposite color conversion layer.
Optionally, the display panel further includes:
an encapsulation layer disposed between the ultraviolet light emitting device and the color conversion layer.
Optionally, the display panel further includes:
and the protective layer is arranged on one side, far away from the color conversion layer, of the photonic crystal layer.
The object of the present invention and the technical problem to be solved are achieved by the following means. According to the present invention, a display device is provided, which includes: a display panel:
the display panel includes:
an array substrate;
the ultraviolet light emitting device is arranged on one side of the array substrate and used for emitting ultraviolet light;
the color conversion layer is arranged on one side, far away from the array substrate, of the ultraviolet light emitting device and is used for converting ultraviolet light into visible light of different colors;
and the photonic crystal layer is arranged on one side of the color conversion layer, which is far away from the ultraviolet light emitting device, and is used for preventing ultraviolet light from emitting and increasing the emission intensity of the visible light converted by the color conversion layer.
The object of the present invention and the technical problem to be solved are achieved by the following means. According to the present invention, a method for manufacturing the display panel includes:
preparing an ultraviolet light emitting device on one side of the array substrate;
preparing and forming a color conversion layer on one side of the ultraviolet light-emitting device far away from the array substrate;
preparing and forming a photonic crystal layer on one side of the color conversion layer away from the ultraviolet light emitting device;
the color conversion layer is used for converting ultraviolet light into visible light with different colors, and the photonic crystal layer is used for preventing the ultraviolet light from exiting and increasing the exit intensity of the visible light converted by the color conversion layer.
By the technical scheme, the display panel, the display device and the display panel manufacturing method at least have the following advantages:
according to the display panel provided by the technical scheme, the light emitting device is set as the ultraviolet light emitting device, and the ultraviolet light with short wavelength and high energy is converted into the required visible light under the action of the color conversion layer through the arrangement of the color conversion layer and the photonic crystal layer, so that the condition that the brightness is greatly attenuated when white light passes through a color film can be effectively avoided in the light conversion process, a large amount of energy is prevented from being converted into heat energy, the energy consumption is reduced, the conversion rate is improved, the problem of light leakage is effectively solved, and meanwhile, the display panel has a wider color gamut; in addition, the photonic crystal layer provided by the embodiment of the invention has the effects of enhancing the intensity of the emergent visible light and blocking ultraviolet rays, so that the light-emitting intensity of the display panel provided by the embodiment of the invention can be further increased, and the damage of the ultraviolet rays to eyes can be avoided.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another display panel according to an embodiment of the present invention.
The reference numbers in fig. 1-2 are:
the LED packaging structure comprises a 1-array substrate, a 2-ultraviolet light emitting device, a 21-first electrode layer, a 22-ultraviolet light emitting layer, a 23-second electrode layer, a 3-color conversion layer, a 4-photonic crystal layer, a 41-two-dimensional photonic crystal layer, a 42-three-dimensional photonic crystal layer and a 5-packaging layer.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the display panel, the display device and the method for manufacturing the display panel according to the present invention, with reference to the accompanying drawings and the preferred embodiments, will be made in detail. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Example one
As shown in fig. 1-2, an embodiment of the present invention provides a display panel, including:
the array substrate 1, the ultraviolet light emitting device 2, the color conversion layer 3 and the photonic crystal layer 4; the ultraviolet light emitting device 2 is arranged on one side of the array substrate 1 and used for emitting ultraviolet light; the color conversion layer 3 is arranged on one side of the ultraviolet light emitting device 2 far away from the array substrate 1 and is used for converting ultraviolet light into visible light with different colors; the photonic crystal layer 4 is disposed on a side of the color conversion layer 3 away from the ultraviolet light emitting device 2, and is used for preventing ultraviolet light from exiting and increasing the exit intensity of the visible light converted by the color conversion layer 3.
Specifically, the array substrate 1 may include a glass substrate, a thin film crystal optical layer, and the like, and the array substrate 1 provided in the embodiment of the present invention is not limited to a specific structure, and may be appropriately selected according to actual needs.
The structure of the ultraviolet light emitting device 2 is not particularly limited as long as it can emit ultraviolet light, and may emit ultraviolet light having a wavelength of 380nm to 430nm, for example. In a specific embodiment, the ultraviolet light emitting device 2 may be an organic light emitting device, and specific components, thicknesses, and light emitting conditions thereof are known to those skilled in the art, and detailed descriptions thereof are not repeated in the embodiment of the present invention.
The color conversion layer 3 may be set to the color conversion layer 3 capable of converting visible light of a plurality of colors according to the use requirement of a user, for example, the color conversion layer 3 may be set to three colors of red, blue, and green, and each color conversion layer is arranged according to a certain rule, specifically, reference may be made to the structure of the color film layer in the prior art, for example, the color conversion layers are set at intervals in the order of red, blue, and green, and are one-to-one opposite to the switching tubes of the array substrate 1, so that the color conversion layer 3 may convert the ultraviolet light emitted by the ultraviolet light emitting layer 22 into the visible light of the above three colors of red, blue, and green, and because the color conversion layers 3 respectively correspond to the switching tubes of the array substrate 1 one-to-one, color mixing of the three colors may be realized, and further, the image display.
Further, the material of the color conversion layer 3 may include quantum dots or quantum rods. Quantum dots are an important low-dimensional semiconductor material, and the size of each of the three dimensions is not larger than twice the exciton bohr radius of the corresponding semiconductor material. Quantum dots are generally spherical or spheroidal, often with diameters between 2-20 nm. Common quantum dots are composed of IV, II-VI, IV-VI or III-V elements, and specifically include, but are not limited to, silicon quantum dots, germanium quantum dots, cadmium sulfide quantum dots, cadmium selenide quantum dots, cadmium telluride quantum dots, zinc selenide quantum dots, lead sulfide quantum dots, lead selenide quantum dots, indium phosphide quantum dots, indium arsenide quantum dots, and the like, by applying a certain electric field or optical pressure to the quantum dots, they can emit light of a specific frequency, and the frequency of the emitted light can change with the change of the size of the semiconductor, so that the color of the emitted light can be controlled by adjusting the size of the nano semiconductor. Therefore, the color conversion layer 3 can be prepared by adopting quantum dots or quantum rods with different materials and sizes, ultraviolet light can be effectively converted into visible light with preset colors required for display, such as visible light with three colors of red, blue and green, and the color conversion layer is high in light conversion efficiency, high in color purity and good in display effect.
Photonic crystals refer to artificial periodic dielectric structures with Photonic Band Gap (PBG) characteristics, sometimes referred to as PBG photonic crystal structures. The structure is a periodic structure that can control the propagation of electromagnetic waves. Certain wavelength-specific transmission or reflection can be achieved using PBG/EBG (EBG is an abbreviation for Electromagnetic Band Gap). The photonic crystal layer 4 provided by the embodiment of the present invention is capable of blocking light in the ultraviolet band and allowing visible light to pass through, and the structure of the photonic crystal layer 4 may be a stack of a two-dimensional photonic crystal layer 41 and a three-dimensional photonic crystal layer 42.
According to the display panel provided by the technical scheme, the light emitting device is set as the ultraviolet light emitting device, and the ultraviolet light with short wavelength and high energy is converted into the required visible light under the action of the color conversion layer 3 through the arrangement of the color conversion layer 3 and the photonic crystal layer 4, so that the condition that the brightness is greatly attenuated when white light passes through a color film can be effectively avoided in the light conversion process, a large amount of energy is prevented from being converted into heat energy, the energy consumption is reduced, the conversion rate is improved, the problem of light leakage is effectively solved, and meanwhile, the display panel has a wider color gamut; in addition, the photonic crystal layer 4 provided by the embodiment of the present invention has the effects of enhancing the intensity of the emitted visible light and blocking ultraviolet light, so that the light-emitting intensity of the display panel provided by the embodiment of the present invention can be further increased, and the ultraviolet light is prevented from damaging eyes.
In a specific implementation, the display panel provided by the embodiment of the present invention includes the ultraviolet light emitting device 2: a first electrode layer 21, an ultraviolet light emitting layer 22 and a second electrode layer 23 which are sequentially stacked on one side of the array substrate 1; a plurality of first electrodes are formed at intervals on the first electrode layer 21, the first electrodes are opposite to the switching tubes of the array substrate 1 one by one, and the orthographic projection of each color conversion layer 3 on the substrate covers the orthographic projection of one first electrode on the substrate.
Specifically, the structure of the ultraviolet light emitting device 2 may refer to the structure of an organic light emitting device in the art, the number of the first electrode layers 21 of the ultraviolet light emitting device 2 may be the same as the number of the switching tubes of the array substrate 1, a plurality of first electrodes of the first electrode layers 21 need to be covered on each switching tube of the array substrate 1, and the second electrode layer 23 may be an integral layer, or a plurality of second electrodes opposite to the number and positions of the first electrodes in the first electrode layers 21 may be formed. The materials and thicknesses of the first electrode layer 21, the ultraviolet light emitting layer 22, and the second electrode layer 23 are known to a skilled person, and the description of the embodiment of the present invention is omitted, as long as the ultraviolet light emitting device 2 can emit ultraviolet light with different intensities.
In a specific implementation, wherein the photonic crystal layer 4 comprises a two-dimensional photonic crystal layer 41 and a three-dimensional photonic crystal layer 42 arranged in a stack; the two-dimensional photonic crystal layer 41 is used for increasing the emission intensity of the visible light converted by the color conversion layer 3, and the three-dimensional photonic crystal layer 42 has a band gap for blocking an ultraviolet band and is used for blocking ultraviolet light from exiting.
Further, the three-dimensional photonic crystal layer 42 is disposed between the color conversion layer 3 and the two-dimensional photonic crystal layer 41 as shown in fig. 1; alternatively, the two-dimensional photonic crystal layer 41 is disposed between the color conversion layer 3 and the three-dimensional photonic crystal layer 42 as shown in fig. 2.
Specifically, the two-dimensional photonic crystal layer 41 refers to a structure in which dielectric materials having different dielectric constants are periodically arranged in a two-dimensional space. In one embodiment of the present invention, the two-dimensional photonic crystal layer 41 is composed of alternately arranged high refractive index materials (e.g., SiN, TiO)2ZnS, etc.) and low refractive index materials (e.g., SiO)2LiF, etc.), but not limited to the above substances, by alternating arrangement of the above substances with different dielectric constants, by adjusting refractive index, dielectric constant, thickness, etc., the transmission and reflection effects on light with different wavelengths can be realized, and simultaneously, the effect of blocking water and oxygen is good, and the reliability of the display panel is also improved; specific parameters such as material, thickness, refractive index and the like can be flexibly adjusted according to actually required reflection or transmission wavelength, reflectivity and transmissivity, and are not described herein in detail, but it should be noted that the two-dimensional photonic crystal layer 41 provided in the embodiment of the present invention needs to select appropriate material, thickness and refractive index according to the wavelength of the visible light converted by the light conversion layer, so as to ensure that the intensity of the visible light converted by the light conversion layer can be increased. The three-dimensional photonic crystal layer 42 is a stack of a plurality of two-dimensional photonic crystal layers 41, and the material, thickness and refractive index thereof need to satisfy the requirement of being capable of blocking ultraviolet light and projecting lightThe visible light converted by the conversion layer, i.e., the three-dimensional photonic crystal layer 42 has a band gap blocking the ultraviolet band.
In a specific implementation, in order to better increase the intensity of the visible light converted by the light conversion layer by the two-dimensional photonic crystal layer 41, for example, the intensity of the red light, the blue light and the green light is projected and increased, the two-dimensional photonic crystal layer 41 may be provided in plurality, the two-dimensional photonic crystal layer 41 is respectively opposite to the color conversion layers 3, and the band gap of each two-dimensional photonic crystal layer 41 corresponds to the wavelength band of the visible light converted by the opposite color conversion layer 3.
In a specific implementation, the display panel provided in the embodiment of the present invention further includes: an encapsulating layer 5 and a protective layer (not shown in the figure), the encapsulating layer 5 being disposed between the ultraviolet light emitting device 2 and the color conversion layer 3; the protective layer is disposed on the side of the photonic crystal layer 4 away from the color conversion layer 3.
Specifically, the encapsulation layer 5 may be a combination of an organic film layer and an inorganic film layer, and the specific structure may refer to a conventional technique as long as the encapsulation layer 5 can have waterproof, planarization, and insulating effects. The structure of the protective layer may be the same as or different from that of the encapsulating layer 5, for example, the protective layer may be only a waterproof layer, a strength-enhancing layer, or the like. Specifically, the material and thickness of the encapsulation layer 5 and the material and thickness of the protection layer are not limited in the embodiments of the present invention.
Example two
A second embodiment of the present invention provides a display device, including: a display panel;
as shown in fig. 1 to 2, the display panel includes:
the array substrate 1, the ultraviolet light emitting device 2, the color conversion layer 3 and the photonic crystal layer 4; the ultraviolet light emitting device 2 is arranged on one side of the array substrate 1 and used for emitting ultraviolet light; the color conversion layer 3 is arranged on one side of the ultraviolet light emitting device 2 far away from the array substrate 1 and is used for converting ultraviolet light into visible light with different colors; the photonic crystal layer 4 is disposed on a side of the color conversion layer 3 away from the ultraviolet light emitting device 2, and is used for preventing ultraviolet light from exiting and increasing the exit intensity of the visible light converted by the color conversion layer 3.
Specifically, the display panel described in the second embodiment can directly use the display panel provided in the first embodiment, and the specific implementation structure can refer to the related contents described in the first embodiment, and is not described herein again.
According to the display panel used by the display device, the light emitting device is set as the ultraviolet light emitting device, and the ultraviolet light with short wavelength and high energy is converted into the required visible light under the action of the color conversion layer 3 through the arrangement of the color conversion layer 3 and the photonic crystal layer 4, so that the condition that the brightness is greatly attenuated when white light passes through a color film can be effectively avoided in the light conversion process, a large amount of energy is prevented from being converted into heat energy, the energy consumption is reduced, the conversion rate is improved, the problem of light leakage is effectively solved, and meanwhile, the display panel has a wider color gamut; in addition, the photonic crystal layer 4 provided by the embodiment of the present invention has the effects of enhancing the intensity of the emitted visible light and blocking ultraviolet light, so that the light-emitting intensity of the display panel provided by the embodiment of the present invention can be further increased, and the ultraviolet light is prevented from damaging eyes.
EXAMPLE III
The third embodiment of the present invention provides a method for manufacturing a display panel, including:
preparing an ultraviolet light emitting device on one side of the array substrate;
preparing and forming a color conversion layer on one side of the ultraviolet light-emitting device far away from the array substrate;
preparing and forming a photonic crystal layer on one side of the color conversion layer away from the ultraviolet light emitting device;
the color conversion layer is used for converting ultraviolet light into visible light with different colors, and the photonic crystal layer is used for preventing the ultraviolet light from exiting and increasing the exit intensity of the visible light converted by the color conversion layer.
Specifically, the manufacturing method of the array substrate is known to the skilled person, and the invention is not particularly limited, and the array substrate can be manufactured by referring to the conventional technology. For example, a thin film transistor may be formed on a glass substrate by deposition (e.g., chemical vapor deposition or physical vapor deposition) and photolithography, and specifically, taking a gate electrode in the thin film transistor as an example, a whole electrode layer may be formed on a substrate by deposition, then a photoresist layer may be formed on the electrode layer, then the photoresist layer may be sequentially exposed and developed to obtain a patterned photoresist, then the electrode layer that is not covered by the patterned photoresist may be etched (e.g., wet etching or dry etching), and finally the patterned photoresist may be removed to obtain the gate electrode with a predetermined shape. The manufacturing methods of other structures are similar to this, and are not described in detail herein.
The uv light emitting device may also be formed through the deposition and photolithography processes, and specifically, the plurality of first electrodes may be formed through the deposition and photolithography processes, and then the uv light emitting layer and the second electrode layer may be formed sequentially through the deposition process. Alternatively, the ultraviolet light emitting layer may be formed by an ink jet printing method. The processes are mature processes, the processing yield is high, and large-scale production is easy to realize.
The color conversion layer can be prepared by referring to the manufacturing mode of the color diaphragm plate and adopting a printing process, specifically, the material for forming the color conversion layer can be prepared into ink, then the color conversion layers with different colors are sequentially printed by printing equipment, the color conversion layers are printed at intervals according to a preset arrangement mode, specific operation steps, parameters and the like can be carried out according to a conventional printing process, and redundant description is not repeated here.
The photonic crystal layer can contain superimposed two-dimensional photonic crystal layer and three-dimensional photonic crystal layer, the two-dimensional photonic crystal layer is used for enhancing the visible light's of light conversion layer conversion emergent intensity, the three-dimensional photonic crystal layer is used for blockking the emergent protection user's eyes of ultraviolet light, two-dimensional photonic crystal layer and three-dimensional photonic crystal layer can pile up through the dielectric rod, precision machine drilling, colloidal particle self-organizing growth, colloidal solution self-organizing growth and semiconductor technology's one or more mode preparation, concrete step and parameter can be gone on according to conventional process, no longer give unnecessary details one by one here. In addition, two-dimensional photonic crystal layer can also add the mode preparation of sculpture through the deposit, and three-dimensional photonic crystal layer then can form through the stack of two-dimensional photonic crystal layer, and it is only to notice that the material, thickness, the refracting index isoparametric that form two-dimensional photonic crystal layer and three-dimensional photonic crystal layer are distinguished to guarantee that two-dimensional photonic crystal layer can strengthen the intensity of the visible light of photoconversion layer conversion, and three-dimensional photonic crystal layer can supply visible light to pass through but block ultraviolet ray.
It will be appreciated that the relevant features of the devices described above may be referred to one another. In addition, "first", "second", and the like in the above embodiments are for distinguishing the embodiments, and do not represent merits of the embodiments.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed apparatus should not be construed to reflect the intent as follows: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are still within the scope of the technical solution of the present invention.
Claims (10)
1. A display panel, comprising:
an array substrate;
the ultraviolet light emitting device is arranged on one side of the array substrate and used for emitting ultraviolet light;
the color conversion layer is arranged on one side, far away from the array substrate, of the ultraviolet light emitting device and is used for converting ultraviolet light into visible light of different colors;
and the photonic crystal layer is arranged on one side of the color conversion layer, which is far away from the ultraviolet light emitting device, and is used for preventing ultraviolet light from emitting and increasing the emission intensity of the visible light converted by the color conversion layer.
2. The display panel according to claim 1,
the color conversion layer comprises a plurality of color conversion layers capable of converting visible light with different colors, and the plurality of color conversion layers are arranged at intervals and are opposite to the switch tubes of the array substrate one by one.
3. The display panel according to claim 2, wherein the ultraviolet light emitting device comprises:
the first electrode layer, the ultraviolet light-emitting layer and the second electrode layer are sequentially stacked on one side of the array substrate;
the first electrode layers are formed at intervals to form a plurality of first electrodes which are opposite to the switch tubes of the array substrate one by one, and the orthographic projection of each color conversion layer on the substrate covers the orthographic projection of one first electrode on the substrate.
4. The display panel according to claim 2,
the photonic crystal layer comprises a two-dimensional photonic crystal layer and a three-dimensional photonic crystal layer which are stacked;
the two-dimensional photonic crystal layer is used for increasing the emergence intensity of the visible light converted by the color conversion layer, and the three-dimensional photonic crystal layer has a band gap for blocking an ultraviolet band and is used for preventing ultraviolet light from emerging.
5. The display panel according to claim 4,
the three-dimensional photonic crystal layer is arranged between the color conversion layer and the two-dimensional photonic crystal layer;
or, the two-dimensional photonic crystal layer is disposed between the color conversion layer and the three-dimensional photonic crystal layer.
6. The display panel according to claim 4,
the two-dimensional photonic crystal layers are multiple and are respectively opposite to the color conversion layers, and the band gap of each two-dimensional photonic crystal layer corresponds to the band of visible light converted by the corresponding color conversion layer.
7. The display panel according to claim 1, further comprising:
an encapsulation layer disposed between the ultraviolet light emitting device and the color conversion layer.
8. The display panel according to claim 1, further comprising:
and the protective layer is arranged on one side, far away from the color conversion layer, of the photonic crystal layer.
9. A display device, characterized in that it comprises:
the display panel of any one of claims 1-8.
10. A method of manufacturing the display panel according to any one of claims 1 to 8, comprising:
preparing an ultraviolet light emitting device on one side of the array substrate;
preparing and forming a color conversion layer on one side of the ultraviolet light-emitting device far away from the array substrate;
preparing and forming a photonic crystal layer on one side of the color conversion layer away from the ultraviolet light emitting device;
the color conversion layer is used for converting ultraviolet light into visible light with different colors, and the photonic crystal layer is used for preventing the ultraviolet light from exiting and increasing the exit intensity of the visible light converted by the color conversion layer.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109545832A (en) * | 2018-11-29 | 2019-03-29 | 京东方科技集团股份有限公司 | Organic light-emitting diode display substrate and preparation method thereof, display device |
| CN110224012A (en) * | 2019-06-18 | 2019-09-10 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN111430574A (en) * | 2020-04-29 | 2020-07-17 | 武汉华星光电半导体显示技术有限公司 | Organic light-emitting device, preparation method thereof and display panel |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109545832A (en) * | 2018-11-29 | 2019-03-29 | 京东方科技集团股份有限公司 | Organic light-emitting diode display substrate and preparation method thereof, display device |
| CN110224012A (en) * | 2019-06-18 | 2019-09-10 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN111430574A (en) * | 2020-04-29 | 2020-07-17 | 武汉华星光电半导体显示技术有限公司 | Organic light-emitting device, preparation method thereof and display panel |
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