CN113224121B - Display panel, manufacturing method of display panel and display device - Google Patents
Display panel, manufacturing method of display panel and display device Download PDFInfo
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- CN113224121B CN113224121B CN202110479870.1A CN202110479870A CN113224121B CN 113224121 B CN113224121 B CN 113224121B CN 202110479870 A CN202110479870 A CN 202110479870A CN 113224121 B CN113224121 B CN 113224121B
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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
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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
- H10K59/32—Stacked devices having two or more layers, each emitting at different wavelengths
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- H—ELECTRICITY
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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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Abstract
The application provides a display panel, a manufacturing method of the display panel and display equipment, and relates to the technical field of display. In the present application, the display panel includes a plurality of light emitting units, and the output light of the light emitting units includes red output light having an output wavelength of 600nm or more, and/or blue output light having an output wavelength of 470nm or less. Based on the arrangement, the problem of poor display effect of the display panel in the prior art can be improved.
Description
Technical Field
The application relates to the technical field of display, in particular to a display panel, a manufacturing method of the display panel and display equipment.
Background
Organic Light-Emitting diodes (OLEDs) have the advantages of high response speed, high color purity, wide viewing angle, foldability, low power consumption, and the like, and thus, are widely used in the display field. However, the inventor researches and finds that the conventional OLED display panel has a problem of poor display effect.
Disclosure of Invention
In view of this, an object of the present application is to provide a display panel, a method for manufacturing the display panel, and a display device, so as to solve the problem that the display effect of the display panel in the prior art is poor.
In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions:
a display panel includes a plurality of light emitting units whose output light includes red output light having an output wavelength of 600nm or more and/or blue output light having an output wavelength of 470nm or less.
Based on the above embodiments, the light emitting unit can output red output light with a wavelength greater than or equal to 600nm and/or blue output light with a wavelength less than or equal to 470nm, so that the display panel can have a better display effect.
In a preferred option of the embodiment of the present application, in the display panel, the light emitting unit includes a red light emitting layer and a blue light emitting layer, the red light emitting layer has first light emitting attribute information, and/or the blue light emitting layer has second light emitting attribute information;
wherein the first emission property information includes that a center wavelength of output light of the red emission layer is greater than or equal to 620nm, and the second emission property information includes that a center wavelength of output light of the blue emission layer is less than or equal to 470nm.
Based on the above-described embodiment, the center wavelength of the output light of the red light-emitting layer is red-shifted by forming the red light-emitting layer with the first light-emission property information, and/or the center wavelength of the output light of the blue light-emitting layer is blue-shifted by forming the blue light-emitting layer with the second light-emission property information. Based on this, because the central wavelength of the output light is red-shifted and/or blue-shifted, the color gamut area of the output light (i.e. the area of the triangular region formed by red, green and blue in the chromaticity diagram) can be made larger, thereby improving the problem that the color gamut of the display panel in the prior art is smaller and improving the visual richness of the user.
In a preferable selection of the embodiment of the present application, in the display panel, the first light-emitting attribute information further includes that a center wavelength of output light of the red light-emitting layer is less than or equal to 670nm.
Based on the embodiment, the luminous efficiency of the display panel can be ensured on the basis of improving the color gamut area of the applied display panel.
In a preferred choice of the embodiment of the present application, in the display panel, the first light-emitting property information further includes that a half-peak width of output light of the red light-emitting layer is less than or equal to 40nm.
Based on the embodiment, on the basis of improving the color gamut area of the applied display panel, the display panel can be ensured to have higher color purity by limiting the half-peak width of the red output light.
In a preferable selection of the embodiment of the present application, in the display panel, the second light emission property information further includes that a center wavelength of output light of the blue light emitting layer is greater than or equal to 430nm.
Based on the embodiment, on the basis of increasing the color gamut area of the applied display panel, the blue damage problem caused by the display panel in use can be effectively improved, and the luminous efficiency of the display panel is increased.
In a preferred option of this embodiment, in the display panel, the second light-emitting attribute information further includes that a half-peak width of output light of the blue light-emitting layer is less than or equal to 40nm.
Based on the embodiment, on the basis of improving the color gamut area of the applied display panel, the display panel can be ensured to have higher color purity by limiting the half-peak width of the blue output light.
In a preferred option of the embodiment of the present application, in the display panel, the light emitting unit further includes a red filter layer, and the red filter layer has first filter attribute information;
wherein the first filter attribute information includes that a cutoff wavelength of filtering of the red filter layer is greater than or equal to 600nm.
Based on the embodiment, the cut-off wavelength of the red filter layer can be red-shifted, so that the reflectivity of the ambient light is reduced, and the contrast of a display picture in use is improved.
In a preferred option of this embodiment, in the display panel, the light emitting unit further includes a blue filter layer, the blue filter layer has second filter attribute information,
wherein the second filter attribute information includes a cutoff wavelength of the filtering of the blue filter layer is less than or equal to 400nm.
Based on the embodiment, the cut-off wavelength of the blue filter layer can be subjected to blue shift, so that the reflectivity of the ambient light is reduced, and the contrast of a display picture in use is improved.
On the basis of the above example, an embodiment of the present application further provides another method for manufacturing a display panel, which is used for manufacturing and forming the above display panel, and the method for manufacturing the display panel includes:
manufacturing and forming a substrate;
manufacturing and forming a light emitting unit on one side of the substrate;
wherein the output light of the light emitting unit comprises red output light with an output wavelength of more than or equal to 600nm, and/or blue output light with an output wavelength of less than or equal to 470nm.
On the basis of the above example, the embodiment of the present application further provides a display device, which includes the above display panel.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic structural diagram of a display device provided in an embodiment of the present application.
Fig. 2 is a schematic view of a hierarchical structure of a display panel including a red light emitting layer and a blue light emitting layer according to an embodiment of the present disclosure.
Fig. 3 is a second schematic view of a layer structure of a display panel including a red light emitting layer and a blue light emitting layer according to an embodiment of the present disclosure.
Fig. 4 is a schematic waveform diagram of red shift of center wavelength and cut-off wavelength according to an embodiment of the present application.
Fig. 5 is a third schematic view of a layer structure of a display panel including a red light emitting layer and a blue light emitting layer according to an embodiment of the present disclosure.
Fig. 6 is a fourth schematic view of a layer structure of a display panel including a red light emitting layer and a blue light emitting layer according to an embodiment of the present disclosure.
Fig. 7 is a fifth schematic view of a layer structure of a display panel including a red light emitting layer and a blue light emitting layer according to an embodiment of the present disclosure.
Fig. 8 is a schematic flowchart of a method for manufacturing a display panel according to an embodiment of the present disclosure.
An icon: 10-a display device; 100-a display panel; 110-a first electrode layer; 120-a light emitting layer; 122-a hole transport layer; 124-electron transport layer; 130-a second electrode layer; 140-a filter layer; 200-a drive circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
As shown in fig. 1, an embodiment of the present application provides a display device 10, which may include a display panel 100 and a driving circuit 200. The driving circuit 200 is electrically connected to the display panel 100, and is configured to drive the display panel 100 to display an image.
Alternatively, in an alternative example, the driving circuit 200 may be integrated on a circuit board, and electrically connected to the display panel 100 through a pin or a lead of the circuit board, such as electrically connected to a signal line on the display panel 100. The Circuit Board may be a Flexible Printed Circuit Board (FPCB), a Printed Circuit Board (PCB), a Chip On Film (COF), or the like.
The embodiment of the present application provides a display panel 100, which can be applied to the display device 10. Wherein the display panel 100 may include a plurality of light emitting units. The output light of the light emitting unit includes red output light having an output wavelength of 600nm or more and/or blue output light having an output wavelength of 470nm or less.
With reference to fig. 2 and 3, the light emitting unit may include a first electrode layer 110, a light emitting layer 120, and a second electrode layer 130, which are stacked, and specifically, the light emitting unit may include a red light emitting layer and a blue light emitting layer, that is, the light emitting layer 120 includes a red light emitting layer and a blue light emitting layer. The red light-emitting layer has first light-emitting property information including that a center wavelength of output light of the red light-emitting layer is greater than or equal to 620nm, and/or the blue light-emitting layer has second light-emitting property information including that a center wavelength of output light of the blue light-emitting layer is less than or equal to 470nm.
Based on the above arrangement, when the central wavelength of the output light of the red light-emitting layer is greater than or equal to 620nm, the central wavelength can be red-shifted compared to the central wavelength of the output light of the conventional display panel (as shown in fig. 4, the R-embodiment and the R-reference respectively indicate that the central wavelengths of the output light of the corresponding red light-emitting layers are 635nm and 620nm, i.e., the central wavelength is red-shifted from 620nm to 635 nm). When the center wavelength of the output light of the blue light emitting layer is less than or equal to 470nm, the center wavelength may be blue-shifted compared to the center wavelength of the output light of a conventional display panel. Based on this, because the central wavelength of the output light is red-shifted and/or blue-shifted, the color gamut area of the output light (i.e. the area of the triangular region formed by red, green and blue in the chromaticity diagram) can be made larger, thereby improving the problem that the color gamut of the display panel in the prior art is smaller and improving the visual richness of the user.
It is to be understood that, in the above-described example, "the red light-emitting layer has first light-emission property information, and/or the blue light-emitting layer has second light-emission property information" may include any one of the following three cases:
in the first case, the red light emitting layer has the first light emitting property information, and the blue light emitting layer does not have the second light emitting property information, that is, output light is red-shifted and blue-shifted;
in the second case, the red light emitting layer does not have the first light emitting property information, and the blue light emitting layer has the second light emitting property information, that is, the output light is not red-shifted and is blue-shifted;
in a third case, the red light emitting layer has the first light emitting property information, and the blue light emitting layer has the second light emitting property information, that is, output light is red-shifted and blue-shifted.
On the basis of the above example, it should be noted that, for the first light-emitting attribute information, specific content of the first light-emitting attribute information is not limited, and may be selected according to actual application requirements.
For example, in an alternative example, in order to red-shift the center wavelength of the output light of the red light emitting layer such that the color gamut area of the applied display device 10 is increased, the first light emission property information may include only the center wavelength of the output light of the red light emitting layer greater than or equal to 620nm.
For another example, in another alternative example, on the basis of increasing the color gamut area of the applied display device 10 by red-shifting the center wavelength of the output light of the red light-emitting layer, in order to guarantee the display performance of the display device 10, such as the light-emitting efficiency, and the like, through research by the inventors of the present application, it is found that the first light-emitting property information may further include that the center wavelength of the output light of the red light-emitting layer may be less than or equal to 670nm.
Based on this, in a specific application example, the center wavelength of the output light of the red light emitting layer may be greater than or equal to 620nm and less than or equal to 670nm. Preferably, in a specific embodiment, the central wavelength of the output light of the red light emitting layer may be greater than or equal to 625nm and less than or equal to 645nm. In this range, the center wavelength of the output light of the red light-emitting layer is further red-shifted, so that the color gamut area of the applied display device 10 is further increased. It is to be understood that a specific manner in which the red light-emitting layer outputs the output light having the center wavelength of 620nm or more and 670nm or less is not limited, and for example, the output light of the red light-emitting layer may be processed based on an optical resonator such that the center wavelength of the processed output light is 620nm or more and 670nm or less. For another example, the central wavelength of the output light may be 620nm or more and 670nm or less by forming a fine uneven structure on the surface of the red light-emitting layer.
For another example, in another alternative example, on the basis of increasing the color gamut area of the applied display device 10 by red-shifting the center wavelength of the output light of the red light-emitting layer, in order to make the color purity of the display device 10 higher, the first light-emitting property information may further include that the half-peak width of the output light of the red light-emitting layer is less than or equal to 40nm, as in the R-embodiment shown in fig. 4, and the corresponding half-peak width may be 20nm. In this embodiment, the center wavelength of the output light of the red light-emitting layer may be greater than or equal to 620nm and less than or equal to 670nm, and the half-peak width is less than or equal to 40nm, and by setting within this range, the color gamut display area may be increased to 95% (bt.2020), effectively improving the display effect. Further, when the center wavelength of the output light of the red light emitting layer may be 625nm or more and 645nm or less while the half-peak width is 40nm or less, the color gamut display area may be increased to 96% (bt.2020), effectively improving the display effect.
On the basis of the above example, it should be noted that, for the second light-emitting attribute information, specific contents of the second light-emitting attribute information are not limited, and may be selected according to actual application requirements.
For example, in an alternative example, in order to blue-shift the center wavelength of the output light of the blue light emitting layer such that the color gamut area of the applied display device 10 is increased, the second light emission property information may include only the center wavelength of the output light of the blue light emitting layer less than or equal to 470nm.
For another example, in another alternative example, in order to improve the blue harm problem that "blue light can penetrate through crystalline lens to reach retina to cause atrophy and even death of retinal pigment epithelial cells", and in order to guarantee display performance of the display device 10, such as luminous efficiency, and the like, on the basis of an increase in the color gamut area of the applied display device 10 caused by blue shift of the center wavelength of the output light of the blue light-emitting layer, it is found through research by the inventors of the present application that the second light-emission property information may further include that the center wavelength of the output light of the blue light-emitting layer is greater than or equal to 430nm.
Based on this, in a specific application example, the center wavelength of the output light of the blue light emitting layer may be less than or equal to 470nm and greater than or equal to 430nm. Preferably, in a specific embodiment, the central wavelength of the output light of the blue light emitting layer may be greater than or equal to 445nm and less than or equal to 465nm. In this range, the center wavelength of the output light of the blue light-emitting layer is further blue-shifted, so that the color gamut area of the applied display device 10 is further increased.
It is to be understood that a specific manner in which the blue light emitting layer outputs output light having a center wavelength of 430nm or more and 470nm or less is not limited, and for example, in an alternative example, the blue light emitting layer may include a host material and a guest material, wherein the host material may be 3-tert-butyl-9, 10-bis (2-naphthalene) anthracene (MAND), and the guest material may be NPB and 4,4' - [1, 4-phenylenedi- (1E) -2, 1-ethenediyl ] bis [ N, N-diphenylaniline ] (DSA-ph), to output light having a center wavelength of 455 nm.
In another alternative example, when the surface of the red light-emitting layer forms a micro-relief structure and the blue light-emitting layer includes a host material and a guest material, wherein the host material is 3-tert-butyl-9, 10-bis (2-naphthalene) anthracene (MAND), and the guest material is NPB and 4,4' - [1, 4-phenylenedi- (1E) -2, 1-ethenediyl ] bis [ N, N-diphenylaniline ] (DSA-ph), the specific configurations of the red light-emitting layer and the blue light-emitting layer are matched together to effectively increase the display color gamut, improve the filtering effect on short wavelengths in the visible light region, reduce the reflection of ambient light on the display panel, and improve the contrast of the display panel.
For another example, in another alternative example, the second light emission property information may further include that a half-peak width of the output light of the blue light emitting layer is less than or equal to 40nm in order to make the color purity of the display device 10 higher on the basis of an increase in a color gamut area of the applied display device 10 by blue-shifting a center wavelength of the output light of the blue light emitting layer. In this embodiment, the center wavelength of the output light of the blue light emitting layer may be 430nm or more and 470nm or less while the half-peak width is 40nm or less, and by setting within this range, the color gamut display area can be increased to 95% (bt.2020), effectively improving the display effect. Further, the center wavelength of the output light of the blue light-emitting layer may be 445nm or more and 465nm or less, and at the same time, when the half-peak width is 40nm or less, the color gamut display area may be increased to 96% (bt.2020), effectively improving the display effect.
On the basis of the above example, it should be noted that specific properties of the first electrode layer 110 and the second electrode layer 130 are not limited, and may be selected according to actual application requirements.
For example, in an alternative example, the first electrode layer 110 may be an Anode (Anode) layer, and the second electrode layer 130 may be a Cathode (Cathode) layer.
For another example, in another alternative example, the first electrode layer 110 may be a Cathode (Cathode), and the second electrode layer 130 may be an Anode (Anode) layer.
On the basis of the above example, it should be noted that the specific configuration of the light emitting layer 120 (EML) is not limited, and may be selected according to the actual application requirements.
For example, in an alternative example, the light emitting layer 120 may further include a green light emitting layer on the basis of including the red light emitting layer and the blue light emitting layer, and the light emitting layer 120 may further include a red light emitting layer.
Based on this, different colors can be formed in combination by the respective light emission of the red light emitting layer, the blue light emitting layer and the green light emitting layer, for example, the light emission of the red light emitting layer is controlled individually, and the applied display device 10 can display a red picture; the blue light emitting layer is controlled to emit light individually, and the applied display device 10 can display a blue picture; the green light emitting layer is controlled to emit light independently, and the applied display device 10 can display a green picture; the red light-emitting layer and the blue light-emitting layer are controlled to emit light simultaneously, so that red and blue mixed colors can be displayed, such as a magenta picture; the red light-emitting layer, the blue light-emitting layer and the green light-emitting layer are controlled to emit light simultaneously, and the mixed color of red, blue and green can be displayed, such as a white picture.
Wherein a relative positional relationship of the red light emitting layer, the blue light emitting layer, and the green light emitting layer is not limited. For example, in an alternative example, in conjunction with fig. 5, the red light emitting layer, the blue light emitting layer, and the green light emitting layer may be located at different positions in the same layered structure.
For another example, in another alternative example, the light emitting layer 120 may further include a yellow light emitting layer in addition to the red light emitting layer and the blue light emitting layer.
Based on this, by the light emission of the red light emitting layer, the blue light emitting layer, and the yellow light emitting layer, a mixture of red, blue, and yellow colors, such as white color, can be displayed, and for example, it can be applied to a laminated white light device as shown in fig. 6.
In the above laminated white light device, the light emitting layer may include a red light emitting layer, a yellow light emitting layer, and two blue light emitting layers respectively located in different layered structures. For example, in an alternative example, the order of lamination may be one blue light emitting layer, one red light emitting layer, one yellow light emitting layer, and one blue light emitting layer in a direction from the first electrode layer 110 to the second electrode layer 130.
For example, in an alternative example, the light emitting unit may further include a Hole Transport Layer 122 (HTL) and an Electron Transport Layer 124 (ETL), and may further include a Capping Layer.
The hole transport layer 122 may be disposed between the first electrode layer 110 and the light emitting layer 120, the electron transport layer 124 may be disposed between the light emitting layer 120 and the second electrode layer 130, and the capping layer may be disposed on a side of the second electrode layer 130 away from the light emitting layer.
For another example, in another alternative example, the light emitting unit may further include a Hole Injection Layer (HIL), a Hole blocking Layer (Hole Block Layer), an Electron Blocking Layer (EBL), and the like, on the basis of the above example.
On the basis of the above examples, the light emitting unit may further comprise different structures based on different requirements, such as to improve the problem of light reflection, i.e. the light emitting unit may further comprise a light reflection preventing structure.
Alternatively, the specific structure of the anti-reflective structure is not limited.
For example, in an alternative example, the anti-reflective structure may be a polarizer. The polaroid adopts the principle of polarized light, and can effectively reduce the reflection intensity of external environment light.
For another example, in an alternative example, referring to fig. 7, the anti-reflective structure may be a filter layer 140 formed based on a color filter on encapsulation (COE) technology.
The light emitting unit further includes a filter layer, and the filter layer 140 may be disposed on a side of the second electrode layer 130 away from the light emitting layer 120, and is used for filtering the output light of the light emitting layer 120. For example, in an alternative example, the filter layer 140 may be encapsulated by an Encapsulation layer (Encapsulation) on a side of the capping layer away from the second electrode layer 130.
It is understood that in an alternative example, the filter layer 140 may include a red filter layer. The red filter layer has first filter attribute information including a cutoff wavelength of a filter of the red filter layer greater than or equal to 600nm. Specifically, in an alternative example, the first filter attribute information includes a cut-off wavelength of a filter of the red filter layer being greater than or equal to 600nm and less than or equal to a center wavelength of the red light emitting layer, so as to retain a desired wavelength of the red light emitting layer and improve light emitting efficiency.
Based on the above arrangement, when the cut-off wavelength of the filtered light of the red filter layer is greater than or equal to 600nm, the cut-off wavelength may be red-shifted compared to the cut-off wavelength of the conventional red filter (as shown in fig. 4, CF-embodiment and CF-reference indicate that the cut-off wavelength of the corresponding red filter layer is 600nm and 580nm, respectively, i.e., the cut-off wavelength is red-shifted from 580nm to 600 nm).
In a specific embodiment, when the central wavelength of the output light of the red light emitting layer is greater than or equal to 630nm and less than or equal to 640nm, the half-peak width is less than or equal to 40nm, and the filtered cutoff wavelength of the red filter layer is greater than or equal to 600nm and less than or equal to the central wavelength of the red light emitting layer, the color gamut display area can be increased to 97% (bt.2020), the reflectivity of the ambient light on the display panel can be reduced to 4.5%, and the display effect is effectively improved.
It is understood that, in an alternative example, the filter layer 140 may also include a blue filter layer. The blue filter layer has second filter attribute information including that a cutoff wavelength of a filter of the blue filter layer is less than or equal to 400nm. Through the arrangement mode, the filtering effect of the blue filtering layer is better, the reflection of ambient light on the display panel can be reduced, and the contrast of the display panel is improved. With the above arrangement, when the cut-off wavelength of the filtered light of the blue filter layer is less than or equal to 400nm, the cut-off wavelength can be blue-shifted as compared with the cut-off wavelength of a conventional blue filter. Based on this, since the cut-off wavelength of the filter layer 140 is red-shifted and/or blue-shifted, the reflectance of the ambient light may be reduced, thereby improving the contrast of the display screen.
In a specific embodiment, when the center wavelength of the output light of the blue light emitting layer is greater than or equal to 450nm and less than or equal to 460nm, the half-peak width is less than or equal to 40nm, and the cut-off wavelength of the filtering light of the blue filter layer is less than or equal to 400nm, the color gamut display area can be increased to 97% (bt.2020), and meanwhile, the reflectivity of the ambient light on the display panel can be reduced to 4.5%, which can effectively improve the display effect.
It is to be understood that, based on the above example, any one of the following three cases may be formed with respect to the blue filter layer and the red filter layer:
in a first case, the red filter layer has the first filter attribute information, and the blue filter layer does not have the second filter attribute information, that is, the cut-off wavelength of the red filter layer is red-shifted, and the cut-off wavelength of the blue filter layer is not blue-shifted;
in a second case, the red filter layer does not have the first filter attribute information, and the blue filter layer has the second filter attribute information, that is, the cut-off wavelength of the red green layer is not red-shifted, and the cut-off wavelength of the blue filter layer is blue-shifted;
in a third case, the red filter layer has the first filter attribute information, and the blue filter layer has the second filter attribute information, that is, the cut-off wavelength of the red green layer is red-shifted, and the cut-off wavelength of the blue filter layer is blue-shifted.
In a specific embodiment, the light emitting unit may include a red light emitting layer and a blue light emitting layer, the filter layer 140 includes a red filter layer and a blue filter layer, specifically, a central wavelength of output light of the red light emitting layer is greater than or equal to 630nm, less than or equal to 640nm, a half-peak width is less than or equal to 40nm, a cut-off wavelength of an unfiltered light of the red filter layer is greater than or equal to 600nm and less than or equal to a central wavelength of the red light emitting layer, a central wavelength of output light of the blue light emitting layer is greater than or equal to 450nm, less than or equal to 460nm, a half-peak width is less than or equal to 40nm, and a cut-off wavelength of an unfiltered light of the blue filter layer is less than or equal to 400nm, a color gamut display area may be increased to 98% (bt.2020), a reflectance of ambient light on the display panel may be decreased to 4.3%, and a display effect is effectively improved. Specifically, in the present embodiment, a fine uneven structure is formed on the surface of the red light-emitting layer to obtain output light having a center wavelength of 630nm or more and 640nm or less; the blue light emitting layer may include a host material and a guest material, wherein the host material may be 3-tert-butyl-9, 10-bis (2-naphthalene) anthracene (MAND), and the guest material may be NPB and 4,4' - [1, 4-phenylenebis- (1E) -2, 1-ethenediyl ] bis [ N, N-diphenylaniline ] (DSA-ph) to obtain blue output light having a center wavelength of 450nm or more and 460nm or less.
On the basis of the above example, the display panel 100 may further include a Substrate (Substrate). The first electrode layer 110 may be disposed on one side of the substrate, and the light emitting layer 120 may be disposed on one side of the first electrode layer 110 away from the substrate.
With reference to fig. 8, an embodiment of the present application further provides a manufacturing method of a display panel. The manufacturing method of the display panel is used for manufacturing the display panel 100 described in the foregoing first embodiment, and the flow steps included in the manufacturing method of the display panel will be explained in detail with reference to fig. 8.
In step S110, a formation substrate is manufactured.
Step S120, forming a light emitting unit on one side of the substrate.
In the present embodiment, the display panel 100 including the light emitting unit may be fabricated and formed based on the above steps. Wherein the display panel 100 may output red output light having a wavelength greater than or equal to 600nm and/or blue output light having a wavelength less than or equal to 470nm based on the light emission of the light emitting unit.
It is understood that the light emitting unit can be combined with the explanation of the first embodiment, and is not described in detail herein. Moreover, the manufacturing method of the display panel may further include other steps, such as forming a substrate, a capping layer, an encapsulation layer, and the filter layer 140.
In summary, the display panel, the manufacturing method of the display panel and the display device provided in the present application enable the display panel 100 to output red output light with a wavelength greater than or equal to 600nm and/or blue output light with a wavelength less than or equal to 470nm through the light emitting unit, so that a better display effect can be achieved.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (9)
1. A display panel comprising a plurality of light emitting units whose output light includes red output light having an output wavelength of 600nm or more and blue output light having an output wavelength of 470nm or less;
the light emitting unit includes a red light emitting layer having first light emission attribute information and a blue light emitting layer having second light emission attribute information;
wherein the first emission property information includes that a center wavelength of output light of the red emission layer is greater than or equal to 620nm, and the second emission property information includes that a center wavelength of output light of the blue emission layer is less than or equal to 470nm;
the surface of the red light-emitting layer forms a fine concave-convex structure, and the blue light-emitting layer comprises a host material and a guest material.
2. The display panel according to claim 1, wherein the first light emission property information further comprises that a center wavelength of output light of the red light emission layer is less than or equal to 670nm.
3. The display panel according to claim 1, wherein the first light emission property information further comprises that a half-peak width of output light of the red light emission layer is less than or equal to 40nm.
4. A display panel according to any one of claims 1 to 3, wherein the second light emission property information further comprises that a center wavelength of output light of the blue light emitting layer is greater than or equal to 430nm.
5. The display panel according to any one of claims 1 to 3, wherein the second light emission property information further comprises that a half-peak width of output light of the blue light emitting layer is less than or equal to 40nm.
6. The display panel according to any one of claims 1 to 3, wherein the light-emitting unit further comprises a red filter layer having first filter attribute information;
wherein the first filter attribute information includes a cutoff wavelength of the filtering light of the red filter layer is greater than or equal to 600nm.
7. The display panel according to any one of claims 1 to 3, wherein the light-emitting unit further comprises a blue filter layer having second filter attribute information;
wherein the second filter attribute information includes that a cutoff wavelength of the filtering of the blue filter layer is less than or equal to 400nm.
8. A method for manufacturing a display panel, the method being used for manufacturing and forming the display panel according to any one of claims 1 to 7, and the method comprising:
manufacturing a forming substrate;
manufacturing and forming a light emitting unit on one side of the substrate;
wherein the output light of the light emitting unit includes red output light having an output wavelength of 600nm or more and blue output light having an output wavelength of 470nm or less.
9. A display device, characterized in that the display device comprises the display panel according to any one of claims 1 to 7 or the display panel manufactured by the manufacturing method of the display panel according to claim 8.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109103214A (en) * | 2017-06-20 | 2018-12-28 | 京东方科技集团股份有限公司 | Organic LED display panel and preparation method thereof, display device |
| CN109888118A (en) * | 2019-03-22 | 2019-06-14 | 上海天马有机发光显示技术有限公司 | Display panel and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109103214A (en) * | 2017-06-20 | 2018-12-28 | 京东方科技集团股份有限公司 | Organic LED display panel and preparation method thereof, display device |
| CN109888118A (en) * | 2019-03-22 | 2019-06-14 | 上海天马有机发光显示技术有限公司 | Display panel and display device |
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