CN110335884B - Display panel, display device and display panel processing method - Google Patents
Display panel, display device and display panel processing method Download PDFInfo
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- CN110335884B CN110335884B CN201910355257.1A CN201910355257A CN110335884B CN 110335884 B CN110335884 B CN 110335884B CN 201910355257 A CN201910355257 A CN 201910355257A CN 110335884 B CN110335884 B CN 110335884B
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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
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
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Abstract
The invention provides a display panel, a display device and a display panel processing method, wherein the display panel comprises a substrate, a first electrode layer, a light emitting layer and a second electrode layer which are sequentially stacked on the substrate; the light-emitting layer comprises a plurality of light-emitting areas arranged on the substrate, each light-emitting area comprises a plurality of light-emitting units, and the plurality of light-emitting units are used for emitting N different colors of light including the first color of light; the luminous efficiency of the luminous unit emitting the first color light is less than that of each luminous unit emitting the rest N-1 colors of light; a sub-luminescent layer for emitting first color light is arranged between the first electrode layer and the second electrode layer. According to the display panel, the display device and the display panel processing method, the area of the light emitting area emitting the first color light can be increased by the sub-light emitting layer, so that the current of the light emitting unit emitting the first color light in the light emitting layer can be shared, the service life of the light emitting unit is prolonged, and the service life of the display panel is prolonged.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display panel, a display device and a display panel processing method.
Background
Organic Light-Emitting diodes (OLEDs) have excellent properties such as low power consumption, high color saturation, wide viewing angle, thin thickness, and flexibility, and are therefore widely used in flexible display devices such as terminal devices and wearable devices.
Currently, an OLED display panel includes a substrate, and an anode, a light emitting layer and a cathode sequentially stacked on the substrate, where the light emitting layer includes a plurality of red light emitting units emitting red light beams, a plurality of green light emitting units emitting green light beams, and a plurality of blue light emitting units emitting blue light beams.
However, due to the limitations of processes and materials, the light emitting efficiency of the blue light emitting unit is lower than that of the red light emitting unit and the green light emitting unit, and in order to ensure the light emitting brightness, the current of the blue light emitting unit needs to be increased, which results in a short lifetime of the blue light emitting unit.
Disclosure of Invention
The embodiment of the invention provides a display panel, a display device and a display panel processing method, which aim to solve the problem of short service life of a blue light-emitting unit in the prior art.
An embodiment of the present invention provides a display panel including: the light emitting device comprises a substrate, and a first electrode layer, a light emitting layer and a second electrode layer which are sequentially stacked on the substrate; the light-emitting layer comprises a plurality of light-emitting areas arranged on the substrate, each light-emitting area comprises a plurality of light-emitting units, and the light-emitting units are used for emitting N different colors of light including a first color of light; the luminous efficiency of the luminous units emitting the first color light is less than that of each luminous unit emitting the rest N-1 colors of light; a sub-light emitting layer for emitting first color light is arranged between the first electrode layer and the second electrode layer; wherein N is a natural number greater than 1.
The display panel as described above, wherein the sub light emitting layer includes a first sub light emitting portion; at least part of the light emitting cells in the plurality of light emitting regions are provided with openings at their peripheries, and the first sub light emitting portions are disposed in the openings.
The display panel as described above, wherein the sub light emitting layer includes a second sub light emitting portion connected to the first sub light emitting portion; the second sub-light-emitting part covers a top surface of the light-emitting units, which is away from the substrate.
The display panel as described above, wherein a carrier generation layer is further disposed between the second sub-light emitting portion and the light emitting unit.
The display panel as described above, wherein the first electrode layer is an anode layer, and the second electrode layer is a cathode layer; the light-emitting unit comprises a first hole injection layer, a first hole transport layer, a pixel region, a first electron transport layer and a first electron injection layer which are sequentially stacked on the anode layer; the second sub-light-emitting part and the first sub-light-emitting part respectively comprise a second hole injection layer, a second hole transmission layer, a first color pixel area, a second electron transmission layer and a second electron injection layer which are sequentially stacked along the direction departing from the substrate; the second hole injection layer in the second sub-light-emitting part is arranged on the surface of the carrier generation layer, which faces away from the substrate; the second hole injection layer in the first sub-light emitting portion is disposed on a surface of the anode layer facing away from the substrate.
The display panel as described above, wherein the opening is provided in the periphery of the light emitting cell in each of the light emitting regions.
The display panel as described above, wherein in each of the light emitting areas, the openings in the peripheries of two adjacent light emitting cells are connected or disconnected with each other; and/or the opening in each light emitting area is connected or disconnected with the opening in the adjacent light emitting area.
The embodiment of the invention provides a display device, which comprises a shell and the display panel; the display panel is mounted within the housing.
The embodiment of the invention provides a display panel processing method, which comprises the following steps: forming a first electrode layer on a substrate; forming a light emitting layer including a plurality of light emitting cells on the first electrode layer; the light emitting units are used for emitting light of N different colors including the first color light; the luminous efficiency of the luminous units emitting the first color light is less than that of each luminous unit emitting the rest N-1 colors of light; wherein N is a natural number greater than 1; forming a sub-light emitting layer for emitting a first color light on the light emitting unit; and forming a second electrode layer on the sub-light emitting layer.
The processing method of the display panel as described above, before forming the sub-light emitting layer for emitting the first color light on the light emitting unit, further includes: forming an opening in the periphery of at least a part of the light emitting unit; the sub-light emitting layer includes a first sub-light emitting portion and a second sub-light emitting portion connected to the first sub-light emitting portion; the first sub light emitting portion is formed within the opening; the second sub light emitting portion is formed over the plurality of light emitting cells.
The display panel, the display device and the display panel processing method provided by the embodiment of the invention have the advantages that the display panel, the display device and the display panel processing method are characterized in that a substrate is arranged, and a first electrode layer, a light emitting layer and a second electrode layer are sequentially arranged on the substrate in a stacking mode; the light-emitting layer comprises a plurality of light-emitting areas arranged on the substrate, each light-emitting area comprises a plurality of light-emitting units, and the plurality of light-emitting units are used for emitting N different colors of light including the first color of light; the luminous efficiency of the luminous unit emitting the first color light is less than that of each luminous unit emitting the rest N-1 colors of light; a sub-luminescent layer for emitting first color light is arranged between the first electrode layer and the second electrode layer. The sub-light emitting layer can increase the area of the light emitting region emitting the first color light, so that the current of the light emitting unit emitting the first color light in the light emitting layer can be shared, the service life of the light emitting unit is prolonged, and the service lives of the display panel and the display device are prolonged.
Drawings
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, and it is to be understood that the detailed description set forth herein is merely illustrative and explanatory of the present invention and is not restrictive of the invention as claimed below.
FIG. 1 is a schematic structural diagram of a display panel according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a second display panel according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic cross-sectional view taken along line C-C of FIG. 2;
FIG. 5 is a first schematic cross-sectional view taken along line D-D of FIG. 2;
FIG. 6 is a schematic cross-sectional view taken along line D-D of FIG. 2;
fig. 7 is a schematic cross-sectional view in the direction D-D of fig. 2.
Description of reference numerals:
100: a substrate;
200: a first electrode layer;
210: an anode layer;
300: a light emitting layer;
310: a light emitting unit;
320: a first hole injection layer;
330: a first hole transport layer;
340: a pixel region;
350: a first electron transport layer;
360: a first electron injection layer;
400: a second electrode layer;
410: a cathode layer;
500: a sub-light emitting layer;
510: a first sub light emitting section;
520: a second sub-light emitting section;
530: a second hole injection layer;
540: a second hole transport layer;
550: a first color pixel region;
560: a second electron transport layer;
570: a second electron injection layer;
600: a carrier generation layer;
700: and (4) opening.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, and it is to be understood that the detailed description set forth herein is merely illustrative and explanatory of the present invention and is not restrictive of the invention as claimed below.
Fig. 1 is a schematic structural diagram of a display panel according to a first embodiment of the invention. In the figure, R, G, B represents the color of light emitted by the light-emitting unit or sub-light-emitting layer, respectively, where R is red, G is green, and B is blue. Referring to fig. 1, the present embodiment provides a display panel including: a substrate 100, and a first electrode layer 200, a light-emitting layer 300, and a second electrode layer 400 which are sequentially stacked over the substrate 100; the light emitting layer 300 includes a plurality of light emitting regions disposed on the substrate 100, each light emitting region including a plurality of light emitting cells 310, the plurality of light emitting cells 310 for emitting N different colors of light including a first color of light; and the luminous efficiency of the light emitting unit 310 emitting the first color light is less than that of each of the light emitting units 310 emitting the remaining N-1 colors of light; a sub-light emitting layer 500 for emitting a first color light is disposed between the first electrode layer 200 and the second electrode layer 400; wherein N is a natural number greater than 1.
In particular, the display panel may be an OLED display panel, which may be used in various display devices such as a mobile phone, a display, a television, and the like.
In this embodiment, the substrate 100 may be provided as a bottom layer of the display panel, and the substrate 100 may be a rigid substrate made of glass or the like or a flexible substrate made of organic material such as polyimide. Or the substrate 100 may be alternately formed of organic layers and inorganic layers.
The first electrode layer 200, the light emitting layer 300, and the second electrode layer 400 may be sequentially stacked on the substrate 100. The first electrode layer 200 may be made of a conductive material such as a metal or a semiconductor. The first electrode layer 200 may be an anode layer of the display panel or a cathode layer of the display panel.
The light emitting layer 300 may be disposed over the first electrode layer 200, and the light emitting layer 300 may include a plurality of light emitting regions, and a plurality of light emitting cells 310 may be disposed in each light emitting region.
It is understood that the first electrode layer 200 may be provided with a pixel defining layer, the pixel defining layer is provided with a plurality of first openings arranged in an array, an organic light emitting material is disposed in each first opening, the organic light emitting material in each first opening may form one light emitting unit 310, each light emitting unit 310 may emit light of one color, and the plurality of light emitting units 310 may emit light beams of N different colors according to different properties of the organic light emitting material disposed in the first openings. N is a natural number greater than 1, and taking N lights of the same color as red light, green light and blue light respectively as an example, at least one red light emitting unit, at least one blue light emitting unit and at least one green light emitting unit may form a light emitting region; the light emitting layer 300 may be formed by a plurality of light emitting regions arranged in a predetermined rule (e.g., in an array), so that the display panel can emit light with uniform color.
In addition, since the light emitting efficiency of the N light emitting units 310 emitting light of N different colors is different due to limitations of materials and processes, the light emitting unit 310 having the lowest light emitting efficiency necessarily exists among the light emitting units 310, and the light emitted from the light emitting unit 310 having the lowest light emitting efficiency may be referred to as a first color light. Still take the red light emitting unit, the blue light emitting unit and the green light emitting unit as an example, wherein the blue light emitting unit has the lowest light emitting efficiency, and the blue light can be the first color light. Of course, in a display panel without a blue light emitting unit, the first color light may be other colors. Alternatively, when a light-emitting unit having a lower light-emitting efficiency than a blue light-emitting unit is present in the display panel, the first color light may be a color emitted by the light-emitting unit having the lower light-emitting efficiency.
The second electrode layer 400 may cover the light emitting layer 300, and the second electrode layer 400 may be made of a conductive material such as a metal or a semiconductor. When the first electrode layer 200 can be an anode layer of the display panel, the second electrode layer 400 is a cathode layer of the display panel.
Meanwhile, the display panel further includes a sub-light emitting layer 500, and the sub-light emitting layer 500 may be disposed between the first electrode layer 200 and the second electrode layer 400, and specific disposition positions thereof may be various, for example, referring to fig. 1, the sub-light emitting layer 500 may be disposed between the second electrode layer 400 and the light emitting layer 300. The sub-emission layer 500 may emit a first color light, for example, in the embodiment of fig. 1, the sub-emission layer 500 may emit a blue light. That is, the display panel includes two light emitting film layers emitting light beams, the sub light emitting layer 500 and the light emitting layer 300. The two light-emitting film layers are stacked, and the sub-light-emitting layer 500 emits the first color light, so that the area of a light-emitting area emitting the first color light can be increased, the current sharing effect is achieved, the service life of the light-emitting area emitting the first color light in the display panel is prolonged, and the service life of the display panel is prolonged.
Preferably, a carrier generation layer 600 is further disposed between the sub light emitting layer 500 and the light emitting cell 310. The carrier generation layer 600 can provide electrons and holes simultaneously, which can serve as an anode of the sub-light emitting layer 500 and a cathode of the light emitting unit 310, thereby forming a stacked structure, which is actually equivalent to forming two first color organic light emitting diodes for the light emitting unit 310 emitting the first color, and can simultaneously share current, thereby further improving the lifetime of the display panel.
The display panel provided by the embodiment is formed by arranging a substrate, and sequentially laminating a first electrode layer, a light-emitting layer and a second electrode layer which are arranged on the substrate; the light-emitting layer comprises a plurality of light-emitting areas arranged on the substrate, each light-emitting area comprises a plurality of light-emitting units, and the plurality of light-emitting units are used for emitting N different colors of light including the first color of light; the luminous efficiency of the luminous unit emitting the first color light is less than that of each luminous unit emitting the rest N-1 colors of light; a sub-luminescent layer for emitting first color light is arranged between the first electrode layer and the second electrode layer. The sub-light emitting layer can increase the area of the light emitting region emitting the first color light, so that the current of the light emitting unit emitting the first color light in the light emitting layer can be shared, the service life of the light emitting unit is prolonged, and the service lives of the display panel and the display device are prolonged.
Fig. 2 is a schematic structural diagram of a second display panel according to an embodiment of the invention. Referring to fig. 2, in another embodiment, the sub-emitting layer 500 includes a first sub-emitting portion 510; the periphery of at least some of the light emitting cells 310 in the plurality of light emitting regions is provided with an opening 700, and the first sub light emitting portion 510 is disposed within the opening 700.
Specifically, among all the light emitting cells 310 of the light emitting layer 300, at least a portion of the periphery of the light emitting cells 310 is provided with an opening 700. The periphery may be a peripheral portion of the light emitting unit 310 in a direction parallel to the substrate 100, i.e., the opening 700 may be disposed at the same layer as the light emitting unit 310. For some embodiments having a pixel defining layer between the light emitting cells 310, the opening 700 may be formed in the pixel defining layer.
The first sub-light emitting part 510 may be disposed in the opening 700, and the first sub-light emitting part 510 may also emit the first color light, so as to increase the area of the light emitting region emitting the first color light, thereby performing the function of current sharing and improving the service life of the display panel.
Further, with continued reference to fig. 2, the sub light emitting layer 500 includes a second sub light emitting portion 520 connected to the first sub light emitting portion 510; the second sub light emitting portion 520 covers a top surface of the plurality of light emitting cells 310 facing away from the substrate 100.
Specifically, the first sub light emitting part 510 may be disposed at the same layer as the light emitting cells 310, and the second sub light emitting part 520 may be disposed at the top of all the light emitting cells 310, i.e., the second sub light emitting part 520 is disposed at a different layer from the light emitting cells 310. The first sub light emitting part 510 and the second sub light emitting part 520 may have an entire layer structure covering the substrate 100, and may be conveniently processed.
Meanwhile, due to the limitation of the existing process, the minimum distance between two adjacent light emitting units 200 is fixed, and the formation of the opening 700 and the entire sub-light emitting layer 500 can break the limitation of the existing process, improve the aperture ratio of the display panel and the area of the light emitting region emitting the first color light, thereby further improving the service life of the display panel.
Preferably, a carrier generation layer 600 is further disposed between the second sub-light emitting portion 520 and the light emitting cell 310. The carrier generation layer 600 may provide electrons and holes simultaneously, which may serve as an anode of the second sub-light emitting part 520 and a cathode of the light emitting unit 310, thereby forming a stacked structure, which may be substantially equivalent to forming two first color organic light emitting diodes for the light emitting unit 310 emitting the first color, and may simultaneously share current, further improving the lifetime of the display panel.
FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2; fig. 4 is a schematic cross-sectional view taken along line C-C in fig. 2. Referring to fig. 3 and 4, in one embodiment, the first electrode layer 200 is an anode layer 210, and the second electrode layer 400 is a cathode layer 410; the light emitting unit 310 includes a first hole injection layer 320, a first hole transport layer 330, a pixel region 340, a first electron transport layer 350, and a first electron injection layer 360, which are sequentially stacked on the anode layer 210; each of the second sub-light emitting portion 520 and the first sub-light emitting portion 510 includes a second hole injection layer 530, a second hole transport layer 540, a first color pixel region 550, a second electron transport layer 560, and a second electron injection layer 570, which are sequentially stacked in a direction away from the substrate 100; and the second hole injection layer 530 in the second sub-light emitting portion 520 is disposed on the surface of the carrier generating layer 600 away from the substrate 100; the second hole injection layer 530 in the first sub light emitting portion 510 is disposed on a surface of the anode layer 210 facing away from the substrate 100.
Specifically, the first hole injection layer 320 and the first hole transport layer 330 may enable holes of the anode layer 210 to be more easily transported to the pixel region 340, and the second electron transport layer 560 and the second electron injection layer 570 may enable electrons generated by the carrier generation layer 600 to be more easily transported to the pixel region 340, so that the organic light emitting material of the pixel region 340 emits a light beam after the electrons and the holes are combined. Similarly, the second hole injection layer 530, the second hole transport layer 540, the second electron transport layer 560 and the second electron injection layer 570 more easily transport the holes generated by the carrier generation layer 600 and the anode layer 210 and the electrons generated by the cathode layer 410 to the first color pixel region 550, so that the first color pixel region 550 emits the first color light.
FIG. 5 is a first schematic cross-sectional view taken along line D-D of FIG. 2; FIG. 6 is a schematic cross-sectional view taken along line D-D of FIG. 2; fig. 7 is a schematic cross-sectional view in the direction D-D of fig. 2. Referring to fig. 5 to 7, for convenience of description, four columns of 12 light emitting units 310 are shown in each drawing, each column may include one blue light emitting unit, one red light emitting unit, and one green light emitting unit, and three light emitting units 310 in each column may form one light emitting region; the arrangement order of the light emitting cells 310 in the adjacent two light emitting areas may be the same or different. On the basis of the above-mentioned embodiment, the periphery of the light emitting unit 310 in each light emitting region is provided with the opening 700, and the shape of the opening 700 at the periphery of each light emitting unit 310 may be the same (for example, fig. 5) or different (for example, fig. 7). The opening 700 is formed in each light-emitting area, so that the area of the opening 700 is further increased, the current is more effectively distributed, and the service life of the display panel is prolonged.
In this embodiment, the structure and shape of the opening 700 may be various, so that the structure and shape of the first sub light emitting part 510 may also be various. In fig. 5 and 6, in each light emitting region, the openings 700 at the periphery of two adjacent light emitting cells 310 are connected to each other to form a total opening 700. In fig. 7, the openings 700 at the periphery of two adjacent light emitting cells 310 are disconnected from each other in each light emitting region.
Referring again to fig. 5 and 6, the openings 700 in each light emitting region are disconnected from the openings 700 in the adjacent light emitting regions, as a whole. In fig. 7, the openings 700 in each light emitting area interconnect with the openings 700 in the adjacent light emitting areas.
It is understood that several structures of the openings 700 may be combined with each other, for example, the openings 700 of two adjacent light emitting units 310 may be connected, and the openings 700 of two adjacent light emitting areas may not be connected, which is not described in detail.
The embodiment provides a display device, which comprises a shell and a display panel; the display panel is mounted in the housing.
Specifically, the display device of the present embodiment may be a device with a display function, such as a mobile phone, a display, a television, and a tablet computer. The structure and function of the display panel may be the same as those of the above embodiments, and are not described again. The housing may be a variety of plastic or metal housings, and the display panel may be mounted in the housing.
The display device provided by the embodiment is formed by arranging a substrate, and sequentially laminating a first electrode layer, a light-emitting layer and a second electrode layer which are arranged on the substrate; the light-emitting layer comprises a plurality of light-emitting areas arranged on the substrate, each light-emitting area comprises a plurality of light-emitting units, and the plurality of light-emitting units are used for emitting N different colors of light including the first color of light; the luminous efficiency of the luminous unit emitting the first color light is less than that of each luminous unit emitting the rest N-1 colors of light; a sub-luminescent layer for emitting first color light is arranged between the first electrode layer and the second electrode layer. The sub-light emitting layer can increase the area of the light emitting region emitting the first color light, so that the current of the light emitting unit emitting the first color light in the light emitting layer can be shared, the service life of the light emitting unit is prolonged, and the service lives of the display panel and the display device are prolonged.
The embodiment also provides a display panel processing method, which includes:
step 1, a first electrode layer 200 is formed on a substrate 100.
Step 2, forming a light emitting layer 300 including a plurality of light emitting cells 310 on the first electrode layer 200; the plurality of light emitting units 310 are for emitting N different colors of light including the first color light; and the luminous efficiency of the light emitting unit 310 emitting the first color light is less than that of each of the light emitting units 310 emitting the remaining N-1 colors of light; wherein N is a natural number greater than 1;
step 3, a sub-emission layer 500 for emitting the first color light is formed on the light emitting unit 310.
Step 4, forming a second electrode layer 400 on the sub-emission layer 500.
Specifically, the first electrode layer 200, the light emitting layer 300, the sub-light emitting layer 500, and the second electrode layer 400 may be formed by a common processing method, such as evaporation, sputtering, or the like. The specific structure of the above embodiment can be referred to, and is not described again. The sub-light emitting layer 500 may increase an area of a light emitting region emitting the first color light, so that a current of the light emitting unit 310 emitting the first color light in the light emitting layer 300 may be shared, thereby increasing a lifetime of the light emitting unit 310, and further increasing lifetimes of the display panel and the display device.
Preferably, a carrier generation layer 600 may be disposed between the light emitting layer 300 and the sub-light emitting layer 500. The carrier generation layer 600 can provide electrons and holes simultaneously, which can serve as an anode of the sub-light emitting layer 500 and a cathode of the light emitting unit 310, thereby forming a stacked structure, which is actually equivalent to forming two first color organic light emitting diodes for the light emitting unit 310 emitting the first color, and can simultaneously share current, thereby further improving the lifetime of the display panel.
Further, between step 2 and step 3, the method further comprises the following steps: step 21, forming an opening 700 at the periphery of at least part of the light emitting unit 310; the sub-light emitting layer 500 includes a first sub-light emitting portion 510 and a second sub-light emitting portion 520 connected to the first sub-light emitting portion 510; the first sub light emitting portion 510 is formed in the opening 700; the second sub light emitting part 520 is formed on the plurality of light emitting cells 310.
Specifically, after the light emitting layer 300 is formed, the openings 700 may be formed between the partial light emitting units 310, and then the entire sub-light emitting layer 500 covering the outside of the substrate 100, that is, the first sub-light emitting portion 510 and the second sub-light emitting portion 520 may be formed in the same process by the CMM process.
It can be understood that, due to the limitation of the existing process, the minimum distance between two adjacent light emitting units 310 is constant, and by forming the opening 700 and the entire sub-light emitting layer 500, the limitation of the existing process can be broken, and the gap between two adjacent light emitting units 310 can be utilized to form a light emitting region, thereby increasing the aperture ratio of the display panel and the area of the light emitting region emitting the first color light, and further increasing the lifetime of the display panel.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description above, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (11)
1. A display panel, comprising: the light emitting device comprises a substrate, and a first electrode layer, a light emitting layer and a second electrode layer which are sequentially stacked on the substrate;
the light-emitting layer comprises a plurality of light-emitting areas arranged on the substrate, each light-emitting area comprises a plurality of light-emitting units, and the light-emitting units are used for emitting N different colors of light including a first color of light; the luminous efficiency of the luminous units emitting the first color light is less than that of each luminous unit emitting the rest N-1 colors of light; a sub-light emitting layer for emitting first color light is arranged between the first electrode layer and the second electrode layer; wherein N is a natural number greater than 1;
at least a portion of the sub-light emitting layers are positioned between adjacent light emitting cells.
2. The display panel according to claim 1, wherein the sub light emitting layer includes a first sub light emitting portion; at least part of the light emitting cells in the plurality of light emitting regions are provided with openings at their peripheries, and the first sub light emitting portions are disposed in the openings.
3. The display panel according to claim 2, wherein the sub light-emitting layer includes a second sub light-emitting portion connected to the first sub light-emitting portion; the second sub-light-emitting part covers a top surface of the light-emitting units, which is away from the substrate.
4. The display panel according to claim 3, wherein a carrier generation layer is further provided between the second sub light emitting portion and the light emitting cell.
5. The display panel according to claim 4, wherein the first electrode layer is an anode layer and the second electrode layer is a cathode layer;
the light-emitting unit comprises a first hole injection layer, a first hole transport layer, a pixel region, a first electron transport layer and a first electron injection layer which are sequentially stacked on the anode layer;
the second sub-light-emitting part and the first sub-light-emitting part respectively comprise a second hole injection layer, a second hole transmission layer, a first color pixel area, a second electron transmission layer and a second electron injection layer which are sequentially stacked along the direction departing from the substrate;
the second hole injection layer in the second sub-light-emitting part is arranged on the surface of the carrier generation layer, which faces away from the substrate; the second hole injection layer in the first sub-light emitting portion is disposed on a surface of the anode layer facing away from the substrate.
6. The display panel according to any one of claims 2 to 5, wherein the opening is provided in each of the light-emitting regions at a periphery of the light-emitting unit.
7. The display panel according to claim 6, wherein in each of the light emitting regions, the openings in the peripheries of adjacent two of the light emitting cells are connected to or disconnected from each other;
and/or the presence of a gas in the gas,
the opening in each light emitting region is connected to or disconnected from the opening in an adjacent light emitting region.
8. A display panel, comprising: the light emitting device comprises a substrate, and a first electrode layer, a light emitting layer and a second electrode layer which are sequentially stacked on the substrate;
the light-emitting layer comprises a plurality of light-emitting areas arranged on the substrate, each light-emitting area comprises a plurality of light-emitting units, and the light-emitting units are used for emitting N different colors of light including a first color of light; the luminous efficiency of the luminous units emitting the first color light is less than that of each luminous unit emitting the rest N-1 colors of light; a sub-light emitting layer for emitting first color light is arranged between the first electrode layer and the second electrode layer; wherein N is a natural number greater than 1;
the sub-light emitting layer covers a top surface of the light emitting units, which faces away from the substrate.
9. A display device characterized by comprising a housing and the display panel according to any one of claims 1 to 8; the display panel is mounted within the housing.
10. A display panel processing method is characterized by comprising the following steps:
forming a first electrode layer on a substrate;
forming a light emitting layer including a plurality of light emitting cells on the first electrode layer; the light emitting units are used for emitting light of N different colors including the first color light; the luminous efficiency of the luminous units emitting the first color light is less than that of each luminous unit emitting the rest N-1 colors of light; wherein N is a natural number greater than 1;
forming a sub-light emitting layer for emitting a first color light on the light emitting unit;
and forming a second electrode layer on the sub-light emitting layer.
11. The display panel processing method according to claim 10,
before forming a sub-emitting layer for emitting a first color light on the light emitting unit, the method further includes: forming an opening in the periphery of at least a part of the light emitting unit;
the sub-light emitting layer includes a first sub-light emitting portion and a second sub-light emitting portion connected to the first sub-light emitting portion; the first sub light emitting portion is formed within the opening; the second sub light emitting portion is formed over the plurality of light emitting cells.
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| CN111864089B (en) * | 2020-07-06 | 2022-02-22 | 武汉华星光电半导体显示技术有限公司 | Organic light emitting diode device and display panel |
| CN111682125A (en) * | 2020-07-06 | 2020-09-18 | 武汉华星光电半导体显示技术有限公司 | Organic light emitting diode display device, method of manufacturing the same, and display panel |
| CN113328053A (en) * | 2021-05-20 | 2021-08-31 | 武汉华星光电技术有限公司 | Display panel |
| CN118676274A (en) * | 2023-03-17 | 2024-09-20 | 华为技术有限公司 | Light emitting diode epitaxial structure, display panel and electronic equipment |
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