CN117479774A - Display panel and display device - Google Patents

Display panel and display device Download PDF

Info

Publication number
CN117479774A
CN117479774A CN202311094916.3A CN202311094916A CN117479774A CN 117479774 A CN117479774 A CN 117479774A CN 202311094916 A CN202311094916 A CN 202311094916A CN 117479774 A CN117479774 A CN 117479774A
Authority
CN
China
Prior art keywords
dielectric layer
refractive index
layer
display panel
light emitting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311094916.3A
Other languages
Chinese (zh)
Inventor
万颖
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Original Assignee
Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority to CN202311094916.3A priority Critical patent/CN117479774A/en
Publication of CN117479774A publication Critical patent/CN117479774A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/875—Arrangements for extracting light from the devices
    • H10K59/879—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The application provides a display panel and display device, include: a substrate; a light emitting device layer disposed on the substrate and including a first light emitting unit emitting a first wavelength lambda 1 Is a light of (2); and a stacked dielectric layer located on a side of the light emitting device layer away from the substrate, and comprising: a first stacked dielectric layer overlapping the first light emitting unit in the thickness direction of the display panel and including L stacked in the thickness direction of the display panel 1 A first dielectric layer and (L) 1 -1) two second dielectric layers, one second dielectric layer being arranged between two adjacent first dielectric layers, the first refractive index n of the first dielectric layers 1 A second refractive index n greater than the second dielectric layer 2 Each first dielectric layer has a thickness lambda 1 /(4n 1 ) Each second dielectric layer has a thickness lambda 1 /(4n 2 )，L 1 Is an integer greater than or equal to 2.

Description

Display panel and display device
Technical Field
The application relates to the technical field of display, in particular to a display panel and a display device.
Background
Organic light emitting diode display panels have become one of the current mainstream display technologies. At present, the light emitted by the organic light emitting diode has the problem of low utilization rate, so that the display brightness of the organic light emitting diode display panel is not very high.
Therefore, a technical solution is needed to improve the utilization of the light emitted by the organic light emitting diode.
Disclosure of Invention
An object of the present invention is to provide a display panel and a display device, which are capable of improving the light extraction rate of the display panel and improving the display brightness of the display device.
In a first aspect, the present application provides a display panel, comprising:
a substrate;
a light emitting device layer disposed on the substrate and including a first light emitting unit emitting a first wavelength lambda 1 Is a light of (2); and
the stacked dielectric layer is positioned on one side of the light emitting device layer away from the substrate, and comprises:
a first stacked dielectric layer overlapping the first light emitting unit in a thickness direction of the display panel and including L stacked in the thickness direction of the display panel 1 A first dielectric layer and (L) 1 -1) two second dielectric layers, one second dielectric layer being arranged between two adjacent first dielectric layers, the first refractive index n of the first dielectric layers 1 A second refractive index n greater than the second dielectric layer 2 Each first dielectric layer has a thickness lambda 1 /(4n 1 ) Each second dielectric layer has a thickness lambda 1 /(4n 2 ) The L is 1 Is an integer greater than or equal to 2.
In some embodiments, the light emitting device layer further comprises:
a second light emitting unit spaced from the first light emitting unit and emitting a second wavelength lambda 2 The second wavelength lambda 2 And a first wavelength lambda 1 Different; and
a third light emitting unit spaced apart from the first light emitting unit and the second light emitting unit, the third light emitting unit emitting a third wavelength lambda 3 The third wavelength lambda 3 And the second wavelength lambda 2 A first wavelength lambda 1 Different;
the stacked dielectric layer further includes:
a second stacked dielectric layer formed on the second display panel in the thickness directionThe light emitting units overlap and include L stacked in the thickness direction of the display panel 2 A third dielectric layer and (L) 2 -1) a fourth dielectric layer, one of which is arranged between two adjacent third dielectric layers, the third dielectric layer having a third refractive index n 3 A fourth refractive index n greater than the fourth dielectric layer 4 Each third dielectric layer has a thickness lambda 2 /(4n 3 ) Each of the fourth dielectric layers has a thickness lambda 2 /(4n 4 ) The L is 2 Is an integer greater than or equal to 2; and
a third stacked dielectric layer overlapping the third light emitting unit in the thickness direction of the display panel and including L stacked in the thickness direction of the display panel 3 Fifth dielectric layer and (L) 3 -1) a sixth dielectric layer, one of which is arranged between two adjacent fifth dielectric layers, a fifth refractive index n of the fifth dielectric layers 5 A sixth refractive index n greater than the sixth dielectric layer 6 Each of the fifth dielectric layers has a thickness lambda 3 /(4n 5 ) Each of the sixth dielectric layers has a thickness lambda 3 /(4n 6 )，L 3 Is an integer greater than or equal to 2.
In some embodiments, L 1 ＝L 2 ＝L 3 。
In some embodiments, the display panel further comprises:
and the flat layer is positioned on one side of the stacked dielectric layer away from the light-emitting device layer.
In some embodiments, the refractive index n of the planar layer t A first refractive index n smaller than the first dielectric layer 1 Fifth refractive index n of the fifth dielectric layer 5 A third refractive index n of the third dielectric layer 3 。
In some embodiments, the material of the first dielectric layer is the same as the material of the third dielectric layer and the material of the fifth dielectric layer, and the material of the second dielectric layer is the same as the material of the fourth dielectric layer and the material of the sixth dielectric layer.
In some embodiments, the first wavelength λ 1 Corresponds to blue light, the second wavelength lambda 2 Corresponds to red light, the third wavelength lambda 3 Corresponds to green light;
the first refractive index n 1 And the second refractive index n 2 Is smaller than the third refractive index n 3 And the fourth refractive index n 4 The difference of the first refractive index n 1 And the second refractive index n 2 Is smaller than the fifth refractive index n 5 And the sixth refractive index n 6 Is a difference in (c).
In some embodiments, the display panel further comprises:
and the packaging layer is positioned between the light-emitting device layer and the stacking medium layer.
In some embodiments, the substrate comprises a light transmissive substrate.
In a second aspect, the present application provides a display device comprising the display panel of any of the embodiments described above.
In some embodiments of the present application, the first stacked dielectric layer overlaps the first light emitting unit in a thickness direction of the display panel. The first stacked dielectric layer includes L stacked in the thickness direction of the display panel 1 A first dielectric layer and (L) 1 -1) two second dielectric layers, one second dielectric layer being arranged between two adjacent first dielectric layers, the first refractive index n of the first dielectric layers 1 A second refractive index n greater than the second dielectric layer 2 Each first dielectric layer has a thickness lambda 1 /(4n 1 ) Each second dielectric layer has a thickness lambda 1 /(4n 2 ). By adopting the design, the light emitted by the first light-emitting unit generates coherent interference in the first stacked medium layer and is reflected to the substrate, so that the transmittance of the light emitted by the first light-emitting unit passing through the substrate is improved, the light-emitting rate of the display panel is improved, and the display brightness of the display device is further improved. In addition, the film layer of the first stacked dielectric layer farthest from the light-emitting device layer is also a first dielectric layer with high refractive index, thereby further improving the first stacked dielectricThe reflectivity of the layer to the light emitted by the first light emitting unit further increases the transmittance of the light emitted by the first light emitting unit through the substrate.
Drawings
Fig. 1 is a schematic cross-sectional structure of a display panel according to some embodiments of the present application;
fig. 2 is a schematic cross-sectional structure of a display panel according to other embodiments of the present application;
FIG. 3 is a schematic cross-sectional view of a display panel according to still other embodiments of the present application;
fig. 4 is a schematic cross-sectional structure of a display device according to some embodiments of the present application.
The reference numerals are as follows:
200, a display device; 100, a display panel; 11, a substrate; 12, a driving circuit layer;
13, a light emitting device layer; 131, a first light emitting unit; 132, a second light emitting unit; 133, a third light emitting unit;
14, stacking dielectric layers; 141, a first stacked dielectric layer; 1411, a first dielectric layer; 1412, a second dielectric layer; 142, a second stacked dielectric layer; 1421, a third dielectric layer; 1422, a fourth dielectric layer; 143, third stacked dielectric layers; 1431, a fifth dielectric layer; 1432, a sixth dielectric layer;
λ 1 a first wavelength; lambda (lambda) 2 A second wavelength; lambda (lambda) 3 A third wavelength;
15, packaging layers;
16, a flat layer;
17, a shading structure.
Detailed Description
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. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Referring to fig. 1 to 3, fig. 1 is a schematic cross-sectional structure of a display panel according to some embodiments of the present application, fig. 2 is a schematic cross-sectional structure of a display panel according to some embodiments of the present application, and fig. 3 is a schematic cross-sectional structure of a display panel according to some embodiments of the present application. The display panel is an organic light emitting diode display panel. The display panel 100 includes a substrate 11, a driving circuit layer 12, a light emitting device layer 13, a stack dielectric layer 14, and an encapsulation layer 15. The display panel 100 is a bottom emission display panel, that is, light emitted from the light emitting device layer 13 passes through the substrate 11 and exits.
The substrate 11 includes a light-transmitting substrate. The light-transmitting substrate includes at least one of a glass substrate and a transparent polymer substrate.
The driving circuit layer 12 is provided on the substrate 11, and the driving circuit layer 12 includes a driving circuit including a driving element such as a thin film transistor.
The light emitting device layer 13 is disposed on a side of the driving circuit layer 12 away from the substrate 11, and is located on the driving circuit layer 12. The light emitting device layer 13 includes a plurality of light emitting devices connected to a plurality of driving circuits, respectively. The plurality of light emitting devices include a first light emitting unit 131, a second light emitting unit 132, and a third light emitting unit 133 disposed at a distance from each other. The first light emitting unit 131 is used for emitting a first wavelength lambda 1 The second light emitting unit 132 is configured to emit light of a second wavelength lambda 2 The third light emitting unit 133 is for emitting light of a third wavelength lambda 3 Is a light source of a light.
For example, a first wavelength lambda 1 Corresponds to blue light, a first wavelength lambda 1 Greater than or equal to 430 nanometers and less than or equal to 500 nanometers. Second wavelength lambda 2 Corresponds to red light, the second wavelength lambda 2 Greater than or equal to 620 nanometers and less than or equal to 760 nanometers. Third wavelength lambda 3 Corresponds to green light, a third wavelength lambda 3 Greater than 500 nanometers and less than or equal to 580 nanometers. It will be appreciated that the first wavelength lambda may also be 1 Corresponds to red light, the second wavelength lambda 2 Corresponds to blue light and has a third wavelength lambda 3 Corresponds to green light.
The first, second and third light emitting units 131, 132 and 133 each include an organic light emitting diode. The organic light emitting diode includes an anode, a cathode, and an organic light emitting layer between the anode and the cathode. The anode and the cathode are light-transmitting electrodes, but not limited thereto, and the material of the light-transmitting electrodes includes transparent conductive material and metal. The transparent conductive material includes, but is not limited to, at least one of indium tin oxide and indium zinc oxide. Metals include, but are not limited to, silver and magnesium.
The encapsulation layer 15 is located on the side of the light emitting device layer 13 remote from the substrate 11 and on the light emitting device layer 13. The encapsulation layer 15 includes two inorganic insulating layers and an organic insulating layer between the two inorganic layers. The material of the inorganic insulating layer includes, but is not limited to, at least one of silicon oxide, silicon nitride, and silicon oxynitride. The material of the organic insulating layer includes, but is not limited to, at least one of polyimide and polyacrylate.
The stacked dielectric layer 14 is located on the side of the light emitting device layer 13 remote from the substrate 11. Specifically, the stacked dielectric layer 14 is located on the encapsulation layer 15 and is in contact with the encapsulation layer 15. The stacked dielectric layers 14 include a first stacked dielectric layer 141, a second stacked dielectric layer 142, and a third stacked dielectric layer 143.
The first stacked dielectric layer 141 is used for reflecting light emitted from the first light emitting unit 131. The first stacked dielectric layer 141 overlaps the first light emitting unit 131 in a direction in which the light emitting device layer 13 is directed toward the substrate 11, also in a thickness direction of the display panel 100. The first stacked dielectric layer 141 includes L stacked in the thickness direction of the display panel 100 1 First dielectric layers 1411 and (L) 1 -1) a second dielectric layer 1412, one second dielectric layer 1412, l being provided between two adjacent first dielectric layers 1411 1 Is an integer greater than or equal to 2. First refractive index n of first dielectric layer 1411 1 A second refractive index n greater than second dielectric layer 1412 2 . Each first dielectric layer 1411 has a thickness lambda 1 /(4n 1 ) Each second dielectric layer 1412 has a thickness lambda 1 /(4n 2 ). First thickness d1=l of first stacked dielectric layer 141 1 λ 1 /(4n 1 )+(L 1 -1)λ 1 /(4n 2 )。
The second stacked dielectric layer 142 is used for reflecting the light emitted from the second light emitting unit 132. The second stacked dielectric layer 142 overlaps the second light emitting unit 132 in the thickness direction of the display panel 100. The second stacked dielectric layer 142 includes L stacked in the thickness direction of the display panel 100 2 Third dielectric layers 1421 and (L 2 -1) a fourth dielectric layer 1422, one fourth dielectric layer 1422 being arranged between two adjacent third dielectric layers 1421, the third refractive index n of the third dielectric layers 1421 3 A fourth refractive index n greater than fourth dielectric layer 1422 4 Each third dielectric layer 1421 has a thickness λ 2 /(4n 3 ) Each fourth dielectric layer 1422 has a thickness λ 2 /(4n 4 )，L 2 Is an integer greater than or equal to 2. Second thickness d2=l of second stacked dielectric layer 142 2 λ 2 /(4n 3 )+(L 2 -1)λ 2 /(4n 4 )。
The third stacked dielectric layer 143 is used for reflecting light emitted from the third light emitting unit 133. The third stacked dielectric layer 143 overlaps the third light emitting unit 133 in the thickness direction of the display panel 100. The third stacked dielectric layer 143 includes L stacked in the thickness direction of the display panel 100 3 Fifth dielectric layers 1431 and (L 3 -1) a sixth dielectric layer 1432, one sixth dielectric layer 1432 being arranged between two adjacent fifth dielectric layers 1431, a fifth refractive index n of the fifth dielectric layers 1431 5 A sixth refractive index n greater than sixth dielectric layer 1432 6 Each fifth dielectric layer 1431 has a thickness λ 3 /(4n 5 ) Each sixth dielectric layer 1432 has a thickness λ 3 /(4n 6 )，L 3 Is an integer greater than or equal to 2. Third thickness d3=l of third stacked dielectric layer 143 3 λ 3 /(4n 5 )+(L 3 -1)λ 3 /(4n 6 )。
In some embodiments, referring to fig. 1, adjacent two of the sidewalls of the first, second, and third stacked dielectric layers 141, 142, and 143 are in contact with each other. In this way, at least part of the first stacked dielectric layer 141, at least part of the second stacked dielectric layer 142, and at least part of the third stacked dielectric layer 143 can be manufactured in the same process, thereby simplifying the manufacturing process of the stacked dielectric layer 14.
In other embodiments, referring to fig. 2, a light shielding structure 17 is disposed between any adjacent one of the sidewalls of the first stacked dielectric layer 141, the second stacked dielectric layer 142, and the third stacked dielectric layer 143. In this way, the first wavelength lambda can be improved 1 Is of a second wavelength lambda 2 Is of a third wavelength lambda 3 The light of (2) presents a problem of mutual crosstalk during coherent interference. The light shielding structure 17 includes a light absorbing material and an organic material, and the light absorbing material is dispersed in the organic material. In other embodiments, the light shielding structure 17 includes a first light shielding structure and a second light shielding structure. The first light shielding structure is disposed between the sidewall of the first stacked dielectric layer 141 and the sidewall of the third stacked dielectric layer 143, and the second light shielding structure is disposed between the sidewall of the third stacked dielectric layer 143 and the sidewall of the second stacked dielectric layer 142. The height of the first light shielding structure is the same as that of the second light shielding structure, and the height of the first light shielding structure and the second light shielding structure are equal to the thickness of the second stacked dielectric layer 142, so that the problem that different lights cross each other in the coherent interference process is solved better.
In still other embodiments, a reflective structure (not shown) is disposed between any adjacent one of the sidewalls of the first, second, and third stacked dielectric layers 141, 142, and 143. In this way, the first wavelength lambda can be improved 1 Is of a second wavelength lambda 2 Is of a third wavelength lambda 3 The light utilization rate of the light can be further improved while the mutual crosstalk problem occurs in the coherent interference process, so that the light output rate of the display panel is further improved.
In some embodiments, L 1＝ L 2＝ L 3 I.e. the number of dielectric layers in the first 141, second 142 and third 143 stacked dielectric layers is the same. In this way, the manufacturing difficulty of the first stacked dielectric layer 141, the second stacked dielectric layer 142, and the third stacked dielectric layer 143 is advantageously reduced.
In some embodiments, L 1 、L 2 L and 3 are all greater than 2 and less than or equal to 9. For example, as shown in fig. 1 and 2, L 1 、L 2 L and 3 all 3, but are not limited thereto.
It should be noted that, for the same film layer, the transmittance of blue light is greater than that of red light and green light, so in order to improve the display effect of the display panel 100, the light extraction rates of red light and green light may be improved. At a first wavelength lambda 1 The light of (2) corresponds to blue light, a second wavelength lambda 2 Corresponds to red light and a third wavelength lambda 3 In the case of the light of (a) corresponding to green light, the second and third stacked dielectric layers 142 and 143 are differently designed from the first stacked dielectric layer 141 in order to improve transmittance of red light and green light.
In some embodiments, referring to FIG. 3, L 2 Greater than L 1 And L is 3 Greater than L 1 . Thus, the number of the dielectric layers in the second stacked dielectric layer 142 and the number of the dielectric layers in the third stacked dielectric layer 143 are greater than the number of the dielectric layers in the first stacked dielectric layer 141, so that the reflectivity of the second stacked dielectric layer 142 to the light with the second wavelength λ2 is improved, the reflectivity of the third stacked dielectric layer 143 to the light with the third wavelength λ3 is improved, and the light extraction rates of the red light and the green light are improved. For example, L 2 And L 3 Are all 3, L 1 2, but is not limited thereto.
In some embodiments, L 2 May also be greater than L 3 The number of dielectric layers in the second stacked dielectric layer 142 is greater than the number of dielectric layers in the third stacked dielectric layer 143 to further improve the light extraction rate of red light.
In other embodiments, the first refractive index n 1 And a second refractive index n 2 Is smaller than the third refractive index n 3 And a fourth refractive index n 4 To improve the light yield of red light. First refractive index n 1 And a second refractive index n 2 Is smaller than the fifth refractive index n 5 And a sixth refractive index n 6 To improve the light yield of green light. Third refractive index n 3 And a fourth refractive index n 4 Is greater than the fifth refractive index n 5 And a sixth refractive index n 6 To further increase the light yield of red light.
When light interferes with the high refractive index layer and the low refractive index layer, the larger the difference between the high refractive index layer and the low refractive index layer, the larger the reflectance of light by the stack of the high refractive index layer and the low refractive index layer.
In some embodiments, the material of the first dielectric layer 1411 is the same as the material of the third dielectric layer 1421 and the material of the fifth dielectric layer 1431. The material of the second dielectric layer 1412 is the same as the material of the fourth dielectric layer 1422 and the material of the sixth dielectric layer 1432. In this way, at least a portion of the first stacked dielectric layer 141 and at least a portion of the second stacked dielectric layer 142 and at least a portion of the third stacked dielectric layer 143 may be manufactured in one process, simplifying the manufacturing process of the display panel.
Note that, when the material of the first dielectric layer 1411 is the same as the material of the third dielectric layer 1421 and the material of the fifth dielectric layer 1431 and the thicknesses of the three layers are different, the three layers may be formed using a halftone mask. The second dielectric layer 1412 may be formed of the same material as the fourth dielectric layer 1422 and the sixth dielectric layer 1432 and may be formed of a halftone mask if the thicknesses of the three layers are different.
In some embodiments, any of first dielectric layer 1411, second dielectric layer 1412, third dielectric layer 1421, fourth dielectric layer 1422, fifth dielectric layer 1431, and sixth dielectric layer 1432 are each independently selected from silicon oxide (SiO 2 ) Silicon nitride, silicon oxynitride, aluminum oxide (Al) 2 O 3 ) Titanium dioxide (TiO) 2 ) Tantalum pentoxide (Ta) 2 O) at least one of the following.
In some embodiments, the display panel 100 further includes a planarization layer 16, the planarization layer 16 being located on a side of the stacked dielectric layer 14 remote from the light emitting device layer 13. The planarization layer 16 planarizes the stacked dielectric layer 14 to ensure that the surface of the display panel 100 remote from the substrate 11 is planar. The thickness of the planar layer 16 is greater than or equal to 2 microns and less than or equal to 5 microns. The material of the planarization layer 16 includes, but is not limited to, an organic insulating material. The height of the first light shielding structure and the height of the second light shielding structure are equal to the thickness of the second stacked dielectric layer 142, which is also beneficial to improving the planarization effect of the planarization layer 16, and the contact area between the light shielding structure 17 and the planarization layer 16 is larger, so that the risk of stripping the planarization layer 16 from the stacked dielectric layer 14 is reduced.
In some embodiments, the refractive index n of the planar layer 16 t A first refractive index n less than the first dielectric layer 1411 1 Third refractive index n of third dielectric layer 1421 3 And a fifth refractive index n of the fifth dielectric layer 1431 5 . In this way, the light incident from the stacked dielectric layer 14 to the planarization layer 16 is advantageously reflected toward the substrate 11, further ensuring the first wavelength λ 1 Is a second wave lambda 2 A third wavelength lambda 3 Is reflected toward the substrate 11, and further improves the light extraction efficiency of the display panel 100.
Referring to fig. 4, based on the same inventive concept, the present application further provides a display device 200, where the display device 200 includes the display panel 100 according to any of the above embodiments.
The above description of the embodiments is only for helping to understand the technical solution of the present application and its core ideas; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A display panel, comprising:
a substrate;
a light emitting device layer disposed on the substrate and including a first light emitting unit emitting a first wavelength lambda 1 Is a light of (2); and
the stacked dielectric layer is positioned on one side of the light emitting device layer away from the substrate, and comprises:
a first layer of the dielectric stack is formed,overlap with the first light emitting unit in the thickness direction of the display panel, and includes L stacked in the thickness direction of the display panel 1 A first dielectric layer and (L) 1 -1) two second dielectric layers, one second dielectric layer being arranged between two adjacent first dielectric layers, the first refractive index n of the first dielectric layers 1 A second refractive index n greater than the second dielectric layer 2 Each first dielectric layer has a thickness lambda 1 /(4n 1 ) Each second dielectric layer has a thickness lambda 1 /(4n 2 ) The L is 1 Is an integer greater than or equal to 2.
2. The display panel of claim 1, wherein the light emitting device layer further comprises:
a second light emitting unit spaced from the first light emitting unit and emitting a second wavelength lambda 2 The second wavelength lambda 2 And a first wavelength lambda 1 Different; and
a third light emitting unit spaced apart from the first light emitting unit and the second light emitting unit, the third light emitting unit emitting a third wavelength lambda 3 The third wavelength lambda 3 And the second wavelength lambda 2 A first wavelength lambda 1 Different;
the stacked dielectric layer further includes:
a second stacked dielectric layer overlapping the second light emitting unit in a thickness direction of the display panel and including L stacked in the thickness direction of the display panel 2 A third dielectric layer and (L) 2 -1) a fourth dielectric layer, one of which is arranged between two adjacent third dielectric layers, the third dielectric layer having a third refractive index n 3 A fourth refractive index n greater than the fourth dielectric layer 4 Each third dielectric layer has a thickness lambda 2 /(4n 3 ) Each of the fourth dielectric layers has a thickness lambda 2 /(4n 4 )，L 2 Is an integer greater than or equal to 2; and
a third stacked dielectric layer overlapping the third light emitting unit in the thickness direction of the display panel and including L stacked in the thickness direction of the display panel 3 Fifth dielectric layer and (L) 3 -1) a sixth dielectric layer, one of which is arranged between two adjacent fifth dielectric layers, a fifth refractive index n of the fifth dielectric layers 5 A sixth refractive index n greater than the sixth dielectric layer 6 Each of the fifth dielectric layers has a thickness lambda 3 /(4n 5 ) Each of the sixth dielectric layers has a thickness lambda 3 /(4n 6 )，L 3 Is an integer greater than or equal to 2.
3. The display panel of claim 2, wherein L 1 ＝L 2 ＝L 3 。
4. The display panel of claim 3, further comprising:
and the flat layer is positioned on one side of the stacked dielectric layer away from the light-emitting device layer.
5. The display panel of claim 4, wherein the planar layer has a refractive index n t A first refractive index n smaller than the first dielectric layer 1 Fifth refractive index n of the fifth dielectric layer 5 A third refractive index n of the third dielectric layer 3 。
6. The display panel of claim 2, wherein a material of the first dielectric layer is the same as a material of the third dielectric layer and a material of the fifth dielectric layer, and a material of the second dielectric layer is the same as a material of the fourth dielectric layer and a material of the sixth dielectric layer.
7. The display panel of claim 2, wherein the first wavelength λ 1 Corresponding to blue light, saidSecond wavelength lambda 2 Corresponds to red light, the third wavelength lambda 3 Corresponds to green light;
the first refractive index n 1 And the second refractive index n 2 Is smaller than the third refractive index n 3 And the fourth refractive index n 4 The difference of the first refractive index n 1 And the second refractive index n 2 Is smaller than the fifth refractive index n 5 And the sixth refractive index n 6 Is a difference in (c).
8. The display panel of claim 1, further comprising:
and the packaging layer is positioned between the light-emitting device layer and the stacking medium layer.
9. The display panel of claim 1, wherein the substrate comprises a light transmissive substrate.
10. A display device comprising the display panel according to any one of claims 1-9.
CN202311094916.3A 2023-08-28 2023-08-28 Display panel and display device Pending CN117479774A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311094916.3A CN117479774A (en) 2023-08-28 2023-08-28 Display panel and display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311094916.3A CN117479774A (en) 2023-08-28 2023-08-28 Display panel and display device

Publications (1)

Publication Number Publication Date
CN117479774A true CN117479774A (en) 2024-01-30

Family

ID=89630094

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311094916.3A Pending CN117479774A (en) 2023-08-28 2023-08-28 Display panel and display device

Country Status (1)

Country Link
CN (1) CN117479774A (en)

Similar Documents

Publication Publication Date Title
JP4525536B2 (en) EL device and electronic apparatus
US10930889B2 (en) Light-emitting device, display apparatus, and illumination apparatus
US9006727B2 (en) Organic light emitting diode display and manufacturing method thereof
CN109962174B (en) Organic light emitting display device
WO2016082341A1 (en) Organic electroluminescence device, preparation method and display device thereof
KR20130095215A (en) Display apparatus, method for manufacturing display apparatus and electronic apparatus
US10510976B2 (en) Light-emitting apparatus
US20140027735A1 (en) Organic light emitting diode display and manufacturing method thereof
JP2013077383A (en) Display device
WO2018061102A1 (en) Light-emitting device
CN112599705B (en) Display panel and preparation method thereof
CN111354868B (en) Light emitting device using light emitting diode
JP4742717B2 (en) LIGHT EMITTING DEVICE, ITS MANUFACTURING METHOD, AND ELECTRONIC DEVICE
CN117479774A (en) Display panel and display device
KR101640692B1 (en) Organic el device, method for manufacturing same, and organic photoelectric conversion device
CN111799387B (en) Display panel, manufacturing method thereof and display device
JP2013073887A (en) Display device
CN113013353A (en) Organic electroluminescent device and display panel
KR101433589B1 (en) Organic Light Emitting Display Device and Method for Manufacturing The Same
KR20160043803A (en) Organic light emitting display device
WO2024065615A1 (en) Display panel and preparation method therefor, and display apparatus and driving method therefor
CN114597325B (en) Light emitting device, display panel and display device
CN110707233B (en) Display panel and display device
CN220402265U (en) Display panel and display device
WO2014069564A1 (en) Organic el element, and image display device and lighting device each of which is provided with same

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination